Electromagnetic pump

Abstract

Disclosed in the present invention is an electromagnetic pump, comprising: a main pipe, a coil assembly, and a retaining frame. The coil assembly is sleeved outside the main pipe; the retaining frame is fixed outside the coil assembly; the retaining frame is used for magnetic conduction outside the coil assembly and is provided with two opposite through holes; the through holes allow passage of the main pipe; the coil assembly comprises an inner coil bobbin, and at least two magnetic yoke rings and an isolation ring are provided inside the coil bobbin and outside the main pipe; the isolation ring is located between the two magnetic yoke rings; a fixing disk is provided on the main pipe; the fixing disk is used for fixedly connecting the main pipe and the retaining frame; a silencing pad is provided between the fixing disk and the retaining frame; and the silencing pad at least partially covers an end face of the retaining frame. In the electromagnetic pump of the present invention, by providing the silencing pad between the fixing disk and the retaining frame, noise caused by collision between the fixing disk of the main pipe and the retaining frame during operation of the electromagnetic pump is reduced, thereby greatly reducing the operating noise of the electromagnetic pump.

Description

An electromagnetic pump Technical Field

[0001] This invention relates to the technical field of pump equipment, and more particularly to an electromagnetic pump. Background Technology

[0002] Small household pumps are commonly used in the water supply and dispensing devices of small appliances such as electric irons, coffee makers, and cleaning machines. Existing electromagnetic pumps achieve their dispensing effect through the cyclical operation of two one-way valves at the inlet and outlet. Current known technology uses a diode connected between a conductive coil and an AC power supply. The diode controls the cyclical switching of the coil, thus controlling the coil's magnetic flux and driving the pump core to circulate accordingly. This pump core movement activates the one-way valves, ultimately enabling the electromagnetic vibrating pump to dispense water. However, this structure still needs further improvement. One issue is that electromagnetic pumps produce considerable noise during operation, leading to less than ideal performance in household appliances. Technical issues

[0003] The purpose of this invention is to provide an electromagnetic pump to solve the technical problem of high operating noise in electromagnetic pumps. Technical solutions

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An electromagnetic pump is provided, comprising: a main pipe, a coil assembly, and a retainer. The coil assembly is sleeved outside the main pipe, and the retainer is fixed outside the coil assembly. The retainer is used to conduct magnetism outside the coil assembly. The retainer has two opposing through holes through which the main pipe passes. The coil assembly includes an inner coil frame. At least two magnetic yokes and an isolation ring are disposed inside the coil frame and outside the main pipe. The isolation ring is located between the two magnetic yokes. A fixing plate is disposed on the main pipe, which is used to fix the main pipe and the retainer together. A sound-absorbing pad is disposed between the fixing plate and the retainer, and the sound-absorbing pad at least partially covers the end face of the retainer. Beneficial effects

[0005] The electromagnetic pump of the present invention reduces the noise caused by the collision between the fixed plate and the cage of the main tube during operation by setting a sound-absorbing pad between the fixed plate and the cage. In addition, the buffering effect of the sound-absorbing pad also reduces the shaking of the main tube itself, thereby reducing the collision noise between the main tube and the coil assembly and the magnetic yoke.

[0006] Preferably, the outer diameter of the magnetic yoke ring near the sound-absorbing pad is smaller than the inner diameter of the through hole on the retainer at that location. The sound-absorbing pad is provided with an annular protrusion, the position of which corresponds to one end of the adjacent magnetic yoke ring. The annular protrusion is located between the fixed disk and the magnetic yoke ring, eliminating the noise caused by the axial collision between the magnetic yoke ring and the fixed disk; at the same time, the annular protrusion presses the magnetic yoke ring tightly, reducing the noise generated by the wobbling of the magnetic yoke ring itself.

[0007] More preferably, the outer diameter of the annular protrusion is smaller than the outer diameter of the adjacent magnetic yoke. This outer diameter setting of the annular protrusion causes it to tend to be pressed towards the center by the magnetic yoke when the fixing disc is fixed to the cage, thereby filling the gap between the magnetic yoke and the main pipe and reducing collision noise between the main pipe and the magnetic yoke.

[0008] More preferably, the outer diameter of the aforementioned annular protrusion is 0.2mm-0.8mm smaller than the outer diameter of the adjacent magnetic yoke. When the difference between their outer diameters is less than 0.2mm, the magnetic yoke exerts little pressure on the annular protrusion towards the center, failing to fill the gap between the main pipe and the magnetic yoke. When the difference between their outer diameters exceeds 0.8mm, the pressing and fixing effect of the annular protrusion on the magnetic yoke is severely weakened, preventing the magnetic yoke from being properly pressed and making it prone to longitudinal vibration.

[0009] More preferably, the inner diameter of the annular protrusion is smaller than the inner diameter of the adjacent magnetic yoke. This inner diameter setting of the annular protrusion allows it to be pressed against the gap between the main pipe and the magnetic yoke when the fixing disc is fixed to the cage, reducing collision noise between the main pipe and the magnetic yoke.

[0010] More preferably, the inner diameter of the aforementioned annular protrusion is 0.1mm-0.25mm smaller than the inner diameter of the adjacent magnetic yoke. When the difference between their inner diameters is less than 0.1mm, the annular protrusion has little tendency to press against the main pipe and the magnetic yoke, and cannot effectively fill the gap between them. When the difference between their inner diameters exceeds 0.25mm, the inner diameter of the annular protrusion may not fit well with the outer diameter of the main pipe, causing the sound-absorbing pad to wrinkle at the main pipe and affecting its noise reduction effect.

[0011] Preferably, the height of the annular protrusion is in the range of 0.15mm-0.5mm. When the height of the annular protrusion is less than 0.15mm, it cannot effectively compress the magnetic yoke, and the magnetic yoke is prone to axial vibration and shaking, colliding with the cage and coil frame and generating noise. When the height of the annular protrusion is greater than 0.5mm, the sound-absorbing pad may not be able to press firmly against the cage, causing the fixed plate to collide with the cage and the main pipe to shake, resulting in greater noise.

[0012] Preferably, the fixed plate has a raised stop rib on one side of the sound-absorbing pad. The stop rib can fix the degree to which the sound-absorbing pad is compressed and fix the relative position of the fixed plate and the retainer, so as not to generate cushioning vibration due to the presence of the sound-absorbing pad.

[0013] More preferably, the number of the aforementioned stop ribs is at least two. Having multiple stop ribs allows for multi-point control of the distance between the fixing plate and the cage, thereby achieving overall vibration damping.

[0014] More preferably, the aforementioned stop ribs are symmetrically arranged with respect to the center of the main pipe. This symmetrical arrangement of the stop ribs can better stabilize the fixing plate and prevent the fixing plate from vibrating in areas where the stop ribs are lacking.

[0015] More preferably, the height of the aforementioned stop rib is in the range of 0.8mm-2mm. When the height of the stop rib is less than 0.8mm, it will not serve its purpose of stopping, or the sound-absorbing pad will need to be very thin so that the stop rib can contact the cage. This will either cause the fixed plate to vibrate because it does not directly contact the cage, or the sound-absorbing pad will be too thin to activate its buffering and vibration damping function. When the height of the stop rib is greater than 2mm, it is easy to make the sound-absorbing pad too thick, which will increase the instability of the fixation and make the main pipe more prone to vibration.

[0016] More preferably, the aforementioned sound-absorbing pad has a clearance corresponding to the position of the stop rib. This clearance can be a notch or a through hole, allowing the stop rib to contact the surface of the cage when the fixed plate and the cage are locked, thereby preventing main pipe vibration.

[0017] More preferably, the height of the stop rib is less than the thickness of the sound-absorbing pad at the corresponding clearance. The height of the stop rib is such that when the fixed plate is locked to the retainer, the sound-absorbing pad is compressed to a certain extent, allowing it to better eliminate vibration.

[0018] More preferably, the height of the stop rib is less than the thickness of the corresponding sound-absorbing pad at the clearance position by 0.05mm-0.3mm. When the difference is less than 0.05mm, the sound-absorbing pad is not compressed enough, which can easily lead to main pipe vibration; when the difference is greater than 0.3mm, the stop rib may not be able to contact the retainer, causing the fixed plate and the retainer to not make contact when locked, resulting in main pipe vibration.

[0019] Preferably, the thickness of the sound-absorbing pad is in the range of 0.8mm-2mm. When the thickness of the sound-absorbing pad is less than 0.8mm, it is easy to fail to activate the buffering and vibration damping function; when the thickness of the sound-absorbing pad is greater than 2mm, the sound-absorbing pad is too thick, which may result in a large locking force or locking stroke, which is not conducive to the relative stability and fixation of the cage and the main pipe.

[0020] Preferably, the inner surface of the isolation ring is provided with an inwardly protruding rib. This rib is used to fix the main tube from the position of the isolation ring, so that the main tube will not swing or vibrate within the coil frame.

[0021] More preferably, the number of raised ribs is at least three. At least three raised ribs can fix the main pipe from multiple directions, so that the main pipe will not swing or vibrate in multiple directions.

[0022] More preferably, the rib is arranged symmetrically with respect to the central axis of the isolation ring. The arrangement of the rib can evenly tighten the main pipe, making the main pipe subjected to uniform force in all directions and less prone to vibration.

[0023] More preferably, the height of the rib is in the range of 0.15mm-0.25mm. When the height of the rib is less than 0.15mm, it cannot hold the main pipe well, and the main pipe is prone to swaying and vibrating; when the height of the rib is greater than 0.25mm, the main pipe will be compressed too much, making the installation of the main pipe difficult, or even causing the main pipe to be deformed at that point, affecting the operation of the internal components of the main pipe.

[0024] More preferably, at least one side of the rib has a force-relieving position. This force-relieving position can be a thinned groove or a through hole. This force-relieving position prevents the isolation ring from deforming when the rib is compressed by the main pipe. Having this force-relieving position on both sides of the rib further prevents deformation of the isolation ring.

[0025] Preferably, the outer diameter of the yoke ring furthest from the fixed plate is larger than the inner diameter of the through hole on the cage at that location, and the yoke ring furthest from the fixed plate is tightly fitted to the coil frame. This tight fit of the yoke ring prevents it from wobbling within the coil frame, thereby reducing noise.

[0026] More preferably, the inner surface of the isolation ring is provided with a disassembly groove, the two ends of which point to the two magnetic yoke rings. This disassembly groove allows the tightly fitted magnetic yoke rings to be knocked off with a tool from the other end during maintenance, preventing the problem of the tightly fitted magnetic yoke rings being difficult to disassemble.

[0027] More preferably, the number of disassembly slots is at least two. Multiple disassembly slots allow the magnetic yoke to be knocked out from multiple points, preventing the magnetic yoke from tilting in another direction and becoming more difficult to remove when knocked at a single point.

[0028] More preferably, the disassembly slot is symmetrically arranged relative to the central axis of the isolation ring. This symmetrical arrangement of the disassembly slot allows the magnetic yoke ring to be controlled in its orientation when it is knocked out, preventing it from tilting and becoming difficult to remove.

[0029] More preferably, a sealing ring is provided in the through hole away from the fixed plate, and the sealing ring is provided on the main pipe. The sealing ring at the end of the main pipe further prevents the main pipe from swinging at that point and prevents the main pipe from colliding with the magnetic yoke and the cage and generating noise when it vibrates. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] in:

[0032] Figure 1 is a cross-sectional view of the electromagnetic pump 1000 according to an embodiment of the present invention;

[0033] Figure 2 is a three-dimensional structural diagram of the main pipe 1100 portion of the electromagnetic pump 1000 according to an embodiment of the present invention.

[0034] Figure 3 is a cross-sectional view of the coil assembly 1200 and the cage 1300 of the electromagnetic pump 1000 according to an embodiment of the present invention.

[0035] The labels for the attached figures are as follows:

[0036] 1000 — Electromagnetic pump;

[0037] 1100 — Supervisor;

[0038] 1110 — Fixed disk;

[0039] 1111——stop rib;

[0040] 1200 — Coil assembly;

[0041] 1210 — Coil frame;

[0042] 1211 — Isolation ring;

[0043] 1212 - convex rib;

[0044] 1213—Release force position;

[0045] 1214 — Disassemble the through groove;

[0046] 1300 – Cage;

[0047] 1310 – First through hole;

[0048] 1320 – Second through hole;

[0049] 1410 – First magnetic yoke ring;

[0050] 1420 – Second magnetic yoke ring;

[0051] 1500 – Sound-absorbing pad;

[0052] 1510 – Ring-shaped protrusion;

[0053] 1520 – Avoid the gap;

[0054] 1600 - Sealing ring. Embodiments of the present invention

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0057] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention 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, they should not be construed as limitations on the present invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] As shown in Figures 1-3, Figure 1 is a cross-sectional view of the electromagnetic pump 1000 according to an embodiment of the present invention; Figure 2 is a three-dimensional view of the main pipe 1100 of the electromagnetic pump 1000 according to an embodiment of the present invention; and Figure 3 is a cross-sectional view of the coil assembly 1200 and the retainer 1300 of the electromagnetic pump 1000 according to an embodiment of the present invention.

[0060] This embodiment discloses an electromagnetic pump 1000, including a main pipe 1100, a coil assembly 1200, and a retainer 1300. The main pipe 1100 passes through the coil assembly 1200 and the retainer 1300, and the retainer 1300 is sleeved on the coil assembly 1200.

[0061] A fixing plate 1110 is provided on the main pipe 1100, which is used to fix the main pipe 1100 and the retainer 1300 together. A sound-absorbing pad 1500 is provided between the fixing plate 1110 and the retainer 1300, and the sound-absorbing pad 1500 partially covers the end faces of the fixing plate 1110 and the retainer 1300.

[0062] The coil assembly 1200 includes a coil frame 1210 on which a coil is wound. An inwardly protruding isolation ring 1211 is formed in the center of the coil frame 1210. A first magnetic yoke 1410 and a second magnetic yoke 1420 are respectively fitted around the main tubes 1100 on both sides of the isolation ring 1211. The second magnetic yoke 1420 is interference-fitted with the coil frame 1210. Four inwardly protruding ribs 1212 are provided on the inner surface of the isolation ring 1211, symmetrically distributed along the central axis of the isolation ring 1211. In other embodiments, the number of ribs can be three. Hollowed-out grooves 1213 are provided on both sides of the ribs 1212 as stress-relieving positions 1213. These stress-relieving positions 1213 allow the ribs 1212 to deform more easily in the radial direction without affecting the shape of the isolation ring 1211 itself. In other embodiments, the stress-relieving position can be provided only on one side of the rib. In this embodiment, the height of the rib 1212 is 0.15 mm. In other embodiments, the height of the rib can also be 0.2 mm or 0.25 mm. A disassembly groove 1214 is provided on the inner surface of the isolation ring 1211. This disassembly groove 1214 connects both ends of the isolation ring 1211, pointing to the first magnetic yoke 1410 and the second magnetic yoke 1420 respectively. There are two disassembly grooves 1214, which are centrally symmetrically distributed along the central axis of the isolation ring 1211. In other embodiments, the number of disassembly grooves can be three.

[0063] The retainer 1300 is made of metal and is used for magnetic conduction. The retainer 1300 has two opposing first through holes 1310 and second through holes 1320 for the main pipe 1100 to pass through. The diameter of the first through hole 1310 is larger than the outer diameter of the first yoke 1410, and the end of the first yoke 1410 extends into the first through hole 1310. The diameter of the second through hole 1320 is smaller than the outer diameter of the second yoke 1420. The end of the second yoke 1420 can contact the retainer 1300.

[0064] The fixed plate 1110 is provided with six stop ribs 1111 protruding towards the retainer 1300. In other embodiments, the number of stop ribs 1111 may be two. The six stop ribs 1111 are symmetrical about the central axis of the main pipe 1100 and are approximately evenly distributed. A clearance 1520 is provided on the sound-absorbing pad 1500 located at the position of the stop rib 1111. The thickness of the sound-absorbing pad 1500 at the clearance 1520 exceeds the height of the stop rib 1111. In this embodiment, the height of the stop rib 1111 is 0.3 mm less than the thickness of the sound-absorbing pad 1500 at the corresponding clearance 1520. In other embodiments, this difference may be 0.2 mm or 0.05 mm. In this embodiment, the height of the stop rib is 0.8 mm. In other embodiments, the height of the stop rib may be 1 mm or 2 mm. In this embodiment, the thickness of the sound-absorbing pad 1500 is 1.1 mm. In another embodiment, the thickness of the sound-absorbing pad can be 0.8 mm or 2 mm.

[0065] The sound-absorbing pad 1500 has an annular protrusion 1510, which abuts against the end of the first magnetic yoke ring 1410. The outer diameter of the annular protrusion 1510 is smaller than the outer diameter of the end of the first magnetic yoke ring 1410. In this embodiment, the outer diameter of the annular protrusion 1510 is 0.5 mm smaller than the outer diameter of the end of the first magnetic yoke ring 1410. In another embodiment, the outer diameter of the annular protrusion is 0.2 mm or 0.8 mm smaller than the outer diameter of the end of the first magnetic yoke ring. The inner diameter of the annular protrusion 1510 is smaller than the inner diameter of the end of the first magnetic yoke ring 1410. In this embodiment, the inner diameter of the annular protrusion 1510 is 0.15 mm smaller than the inner diameter of the end of the first magnetic yoke ring 1410. In another embodiment, the inner diameter of the annular protrusion is 0.1 mm or 0.25 mm smaller than the inner diameter of the end of the first magnetic yoke ring. In this embodiment, the height of the annular protrusion 1510 is 0.4 mm. In another embodiment, the height of the annular protrusion can be 0.15 mm or 0.5 mm.

[0066] A sealing ring 1600 is provided at the end of the main pipe 1100, and the sealing ring 1600 is located inside the outer retainer 1300 of the main pipe 1100.

[0067] The electromagnetic pump 1000 in this embodiment provides a sound-absorbing pad 1500 between the fixed plate 1110 and the retainer 1300, a rib 1212 inside the isolation ring 1211, and a sealing ring 1600 at the end of the main pipe 1100. This clamps the main pipe 1100 from three positions, preventing it from swinging or vibrating and making it less likely to collide with other components, thus greatly reducing the operating noise of the electromagnetic pump 1000.

[0068] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. An electromagnetic pump, comprising: The device comprises a main tube, a coil assembly, and a retainer. The coil assembly is sleeved outside the main tube, and the retainer is fixed outside the coil assembly. The retainer is used to conduct magnetism outside the coil assembly. The retainer has two opposing through holes through which the main tube passes. The coil assembly includes an inner coil frame. At least two magnetic yokes and an isolation ring are disposed inside the coil frame and outside the main tube. The isolation ring is located between the two magnetic yokes. A fixing plate is disposed on the main tube, and the fixing plate is used to fix the main tube and the retainer. The device is characterized in that a sound-absorbing pad is disposed between the fixing plate and the retainer, and the sound-absorbing pad at least partially covers the end face of the retainer.

2. The electromagnetic pump according to claim 1, characterized in that, The outer diameter of the magnetic yoke ring near the sound-absorbing pad is smaller than the inner diameter of the through hole on the retainer at that location. The sound-absorbing pad is provided with an annular protrusion, the position of which corresponds to one end of the adjacent magnetic yoke ring.

3. The electromagnetic pump according to claim 2, characterized in that, The outer diameter of the annular protrusion is smaller than the outer diameter of the adjacent magnetic yoke.

4. The electromagnetic pump according to claim 3, characterized in that, The outer diameter of the annular protrusion is smaller than the outer diameter of the adjacent magnetic yoke by 0.2 mm to 0.8 mm.

5. The electromagnetic pump according to claim 2, characterized in that, The inner diameter of the annular protrusion is smaller than the inner diameter of the adjacent magnetic yoke.

6. The electromagnetic pump according to claim 5, characterized in that, The inner diameter of the annular protrusion is smaller than the inner diameter of the adjacent magnetic yoke by 0.1 mm to 0.25 mm.

7. The electromagnetic pump according to claim 1, characterized in that, The height of the annular protrusion ranges from 0.15mm to 0.5mm.

8. The electromagnetic pump according to claim 1, characterized in that, The fixed plate has a raised stop rib on one side of the sound-absorbing pad.

9. The electromagnetic pump according to claim 8, characterized in that, The number of stop bars is at least two.

10. The electromagnetic pump according to claim 9, characterized in that, The stop ribs are arranged symmetrically with respect to the center of the main pipe.

11. The electromagnetic pump according to claim 8, characterized in that, The height range of the stop rib is 0.8mm-2mm.

12. The electromagnetic pump according to claim 8, characterized in that, The sound-absorbing pad has a clearance corresponding to the position of the stop rib.

13. The electromagnetic pump according to claim 12, characterized in that, The height of the stop rib is less than the thickness of the sound-absorbing pad at the corresponding clearance position.

14. The electromagnetic pump according to claim 13, characterized in that, The height of the stop rib is less than the thickness of the sound-absorbing pad at the corresponding clearance position in the range of 0.05mm-0.3mm.

15. The electromagnetic pump according to claim 1, characterized in that, The thickness of the sound-absorbing pad ranges from 0.8mm to 2mm.

16. The electromagnetic pump according to claim 1, characterized in that, The inner surface of the isolation ring is provided with inwardly protruding ribs.

17. The electromagnetic pump according to claim 16, characterized in that, The number of raised ribs is at least three.

18. The electromagnetic pump according to claim 17, characterized in that, The ribs are arranged symmetrically with respect to the central axis of the isolation ring.

19. The electromagnetic pump according to claim 16, characterized in that, The height of the raised rib is in the range of 0.15mm-0.25mm.

20. The electromagnetic pump according to claim 16, characterized in that, At least one side of the rib is provided with a force-releasing position.

21. The electromagnetic pump according to claim 1, characterized in that, The outer diameter of the magnetic yoke ring away from the fixed disk is larger than the inner diameter of the through hole on the cage at that location, and the magnetic yoke ring away from the fixed disk is tightly fitted to the coil frame.

22. The electromagnetic pump according to claim 21, characterized in that, The inner surface of the isolation ring is provided with a disassembly groove, and the two ends of the disassembly groove point to the two magnetic yokes.

23. The electromagnetic pump according to claim 22, characterized in that, The number of disassembly channels is at least two.

24. The electromagnetic pump according to claim 23, characterized in that, The disassembly channel is symmetrically arranged relative to the central axis of the isolation ring.

25. The electromagnetic pump according to claim 21, characterized in that, A sealing ring is provided inside the through hole away from the fixed plate, and the sealing ring is provided on the main pipe.

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