Miniature electromagnetic water pump

Abstract

The application discloses a micro electromagnetic water pump and relates to the technical field of electromagnetic water pumps, which comprises a pump body, a cylindrical pipe for water inlet and a connector for water outlet, further comprising: an empty pipe installed in the step hole near the water inlet of the cylindrical pipe, a telescopic pipe slidingly installed in the empty pipe, a filter screen arranged at one end of the telescopic pipe in the empty pipe, an inner ring cavity formed in the inner wall of the empty pipe, and an extrusion spring connected between the telescopic pipe and the inner ring cavity; a one-way component arranged in the connector and capable of allowing water to flow out of the connector in one direction only; an iron core installed in the cylindrical pipe, the iron core being provided with a flow channel capable of allowing water to flow from the cylindrical pipe to the connector in one direction only, and a second compression spring connected between the side of the iron core close to the water inlet of the cylindrical pipe and the inner step of the cylindrical pipe. The application can treat the filtered impurities, prevent the water pump from being blocked, and ensure normal use of the water pump.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic water pumps, in particular to a miniature electromagnetic water pump. Background Art

[0002] Micro electromagnetic water pumps are widely used in household care appliances, such as steam cleaners, steam irons, steam brushes, and steam garment irons.

[0003] The micro electromagnetic water pumps currently on the market usually have some common faults when in use, such as the water pump works but does not produce water after starting, insufficient water flow, gradually decreasing flow, abnormal interruption of water output, etc. Among them, problems related to water flow, such as insufficient water flow or gradually decreasing flow, are mostly caused by blockage caused by some impurities in the water inside the water pump or water pipe. In order to solve this phenomenon, in the existing technology, a water filter is usually added inside the water pump or water pipe to filter out particulate impurities in the water, such as scale, stone particles, etc., to prevent them from entering the water pump, thereby solving the above problems to a certain extent.

[0004] However, although this measure can prevent large particles of impurities from entering the water pump for a period of time, after a long period of filtration, the water filter will need to be disassembled and the impurities filtered out will be cleaned regularly. If it is not cleaned for a long time, the filtered impurities will still remain in the pipe and affect the water flow. Summary of the Invention

[0005] The object of the present invention is to provide a micro electromagnetic water pump to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: a micro electromagnetic water pump, comprising a pump body having a cylindrical tube for water inlet and a connector for water outlet, and further comprising:

[0007] The hollow tube is installed in the stepped hole near the water inlet of the cylindrical tube. A telescopic tube is slidably installed in the hollow tube, and a water filter is provided at one end of the telescopic tube located in the hollow tube. The inner wall of the hollow tube is also provided with an inner ring cavity, and an extrusion spring is connected between the telescopic tube and the inner ring cavity.

[0008] A one-way component, which is arranged in the coupling and enables water to flow out of the coupling in only one direction;

[0009] An iron core is installed in the cylindrical tube, the iron core having a flow channel, and the flow channel can only allow water to flow in one direction from the cylindrical tube to the connector, and a second compression spring is connected between the side of the iron core close to the water inlet of the cylindrical tube and the inner step of the cylindrical tube;

[0010] The electromagnetic component cooperates with the second compression spring to control the iron core to perform piston movement in the cylindrical tube, and uses pressure changes to suck water from the cylindrical tube and discharge it from the connector.

[0011] Preferably, the water filter net is configured to be in an arc shape or a cone shape, and the protruding portion protrudes into the inner circle cavity.

[0012] Preferably, an inner wall of the empty tube is provided with an oblique groove, an outer wall of the telescopic tube is fixed with a pin block inserted and slidably installed in the oblique groove, and the spiral direction of the oblique groove is the same as the spiral direction of the extrusion spring.

[0013] Preferably, the one-way component includes a sleeve installed in the connector, and the sleeve is provided with a through hole for water to flow through. The inner wall of the connector is installed with a sealing rubber head that can close or open the through hole through a tower spring. One end of the iron core extends into the sleeve and is sealed and slidably connected thereto.

[0014] Preferably, a tension spring is connected to the inner wall of the flow channel of the iron core, a valve core is fixed to one end of the tension spring close to the sealing rubber head, and the end of the valve core extending out of the flow channel has a conical protrusion, and the maximum diameter of the conical protrusion is larger than the inner diameter of the flow channel.

[0015] Preferably, the electromagnetic assembly comprises a skeleton sleeved on the outer periphery of the cylindrical tube, and a short magnetic yoke ring, a bushing and a long magnetic yoke ring are sequentially arranged between the skeleton and the cylindrical tube;

[0016] The electromagnetic assembly further comprises a coil housing mounted on the periphery of the frame, an enameled wire is mounted between the coil housing and the frame, and a contact piece is also mounted on the coil housing.

[0017] Preferably, a first gasket, an O-ring, a sealing ring and a second gasket are sequentially provided between the sleeve and the cylindrical tube, and a first compression spring is installed between the second gasket and the stepped surface of the outer ring of the iron core.

[0018] Preferably, a push rod is fixed to one end of the valve core extending out of the flow channel, and the diameter of the push rod is smaller than the inner diameter of the through hole on the sleeve.

[0019] Preferably, a spiral guide groove is provided on the surface of the conical protrusion of the valve core, and when the conical protrusion of the valve core contacts the flow channel opening of the iron core, the spiral guide groove will not be connected to the flow channel.

[0020] Preferably, the sealing rubber head is made of PTFE.

[0021] Preferably, the pump body further comprises a retaining frame and a retaining frame cover which can be assembled and installed, and the coil housing is assembled in the retaining frame.

[0022] Preferably, the O-ring is also made of PTFE.

[0023] Preferably, the stepped hole in the cylindrical tube is provided with threads, and the empty tube is installed in the stepped hole by means of threaded connection.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention utilizes the back impact on the water filter net during the suction process to achieve the purpose of cleaning the water filter net, and under the action of the back impact, the extrusion spring is compressed, and the expansion and contraction of the extrusion spring is utilized to crush the granular impurities, and the filtered granular impurities are processed until the diameter of the granular impurities is smaller than the filter hole diameter of the water filter net and then passes through the water filter net, thereby preventing the accumulation of impurities and causing blockage of the pipeline, reducing the impact on the water flow, not only has a simple structure, but also will not cause additional vibration and other impacts to the electromagnetic water pump during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall three-dimensional diagram of the water pump of the present invention;

[0027] Figure 2 It is a cross-sectional view and a partial enlarged view of the water pump of the present invention;

[0028] Figure 3 This is a partial enlarged view of the air tube and its internal structure of the present invention;

[0029] Figure 4 For the present invention Figure 3 cutaway stereograms of perspective;

[0030] Figure 5 This is a schematic diagram of the explosion structure of the internal structure of the air tube of the present invention;

[0031] Figure 6 This is a schematic diagram of the explosion structure of the water pump of the present invention;

[0032] Figure 7 It is an enlarged three-dimensional view of the valve core of the present invention.

[0033] In the figure: 1. screw; 2. connector; 3. tower spring; 4. sealing rubber head; 5. first gasket; 6. sleeve; 7. O-ring; 8. sealing ring; 9. second gasket; 10. contact piece; 11. retainer cover; 12. retainer; 13. skeleton; 14. coil housing; 15. enameled wire; 16. valve core; 17. tension spring; 18. first compression spring; 19. iron core; 20. second compression spring; 21. short magnetic yoke ring; 22. bushing; 23. long magnetic yoke ring; 24. cylindrical tube; 25. empty tube; 26. telescopic tube; 27. water filter; 28. inner ring cavity; 29. ​​extrusion spring; 30. pin block; 31. inclined groove; 32. push rod; 33. spiral guide groove; 34. liquid exchange cavity. DETAILED DESCRIPTION

[0034] 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 making creative efforts are within the scope of protection of the present invention.

[0035] See also Figures 1 to 7 The present invention provides a technical solution: a micro electromagnetic water pump, comprising a pump body, the pump body having a cylindrical tube 24 for water inlet and a connector 2 for water outlet, and further comprising:

[0036] The hollow tube 25 is installed in the stepped hole near the water inlet of the cylindrical tube 24. A telescopic tube 26 is slidably installed in the hollow tube 25. A water filter 27 is provided at one end of the telescopic tube 26 located in the hollow tube 25. An inner ring cavity 28 is also formed on the inner wall of the hollow tube 25. An extrusion spring 29 is connected between the telescopic tube 26 and the inner ring cavity 28.

[0037] A one-way component, disposed in the connector 2 and enabling water to flow out of the connector 2 in only one direction;

[0038] The iron core 19 is installed in the cylindrical tube 24. The iron core 19 has a flow channel, and the flow channel can only allow water to flow in one direction from the cylindrical tube 24 to the connector 2. A second compression spring 20 is also connected between the side of the iron core 19 close to the water inlet of the cylindrical tube 24 and the inner step of the cylindrical tube 24;

[0039] The electromagnetic assembly cooperates with the second compression spring 20 to control the iron core 19 to perform piston motion in the cylindrical tube 24 and utilizes pressure changes to suck water from the cylindrical tube 24 and discharge it from the connector 2.

[0040] In this case, the electromagnetic assembly cooperates with the second compression spring 20 to control the iron core 19 to move closer to the connector 2 in the cylindrical tube 24. The space between the iron core 19 and the connector 2 becomes smaller and the pressure increases. The water pressure in this space then opens the one-way assembly and flows out of the connector 2. At the same time, the space between the iron core 19 and the empty tube 25 becomes larger, and water is sucked from the cylindrical tube 24. The sucked water is filtered through the water filter 27 to separate particulate impurities in the water and prevent them from entering the interior, completing the process of draining the connector 2 and letting water into the cylindrical tube 24.

[0041] When the iron core 19 moves away from the connector 2, the space between the iron core 19 and the connector 2 becomes larger, and the space between the iron core 19 and the empty tube 25 becomes smaller, the water pressure increases, and the water in the cylindrical tube 24 flows into the space between the iron core 19 and the connector 2 under the action of pressure. In this way, as the iron core 19 continues to make reciprocating piston motion, it can continuously suck water from the cylindrical tube 24 and discharge it from the connector 2, completing the process of water absorption and drainage;

[0042] It is worth noting that when the water pressure in the cylindrical tube 24 increases, it also has a counter-impact effect on the water filter 27, separating the particulate impurities filtered by the water filter 27 from the filter holes, thereby playing a role in unblocking the water filter 27 and preventing it from being blocked.

[0043] And under the counter-impact of the water pressure, the telescopic tube 26 and the water filter 27 will also slide in the empty pipe 25, and at the same time, the extrusion spring 29 will be temporarily compressed. During the compression process, the reduction of the pitch of the extrusion spring 29 can crush the granular impurities separated and floating in the inner ring cavity 28, thereby reducing their diameter. When the diameter of the granular impurities is smaller than the filter hole diameter of the water filter 27, they can pass through the water filter 27, thereby processing the filtered granular impurities, preventing the accumulation of impurities and causing pipeline blockage, and reducing the impact on water flow.

[0044] It is worth mentioning that the crushing of granular impurities by the expansion and contraction of the extrusion spring 29 is not only simple in structure, but also does not cause additional vibration and other effects on the electromagnetic water pump during use. The cross-section of the extrusion spring 29 can also adopt different shapes, and is preferably square, which can increase the contact area with the granular impurities, thereby improving the crushing rate and effect.

[0045] In one of the more preferred embodiments, the water filter 27 is configured to be in an arc or conical shape, and the protruding portion protrudes into the inner ring cavity 28 .

[0046] For details, please refer to Figure 3-4 The figure only shows the cambered surface. Since the extrusion surface of the extrusion spring 29 is limited, setting a cambered surface or a cone shape can make the impurity particles in the water roll along the protruding surface toward the edge when the water flows through, that is, close to the position of the extrusion spring 29. Then, under the action of the counter-impact force, the filtered impurities will be more easily flowed into the space between the extrusion springs 29, thereby increasing the efficiency of impurity elimination.

[0047] In one of the more preferred embodiments, an inclined groove 31 is formed on the inner wall of the hollow tube 25 , and a pin block 30 is fixed on the outer wall of the telescopic tube 26 and inserted and slidably installed in the inclined groove 31 , and the spiral direction of the inclined groove 31 is the same as the spiral direction of the extrusion spring 29 .

[0048] Specifically refer to Figure 5 When the hollow tube 25 slides, the hollow tube 25 will rotate at a certain angle under the sliding cooperation of the chute 31 and the pin block 30. Since the spiral direction of the chute 31 is the same as the spiral direction of the extrusion spring 29, the rotation of the hollow tube 25 will reduce the number of turns of the extrusion spring 29 while driving the extrusion spring 29 to compress. At this time, the inner diameter of the end of the extrusion spring 29 close to the telescopic tube 26 will gradually increase. In this way, the extrusion spring 29 will be compressed while the adjacent turns will be staggered with each other, so that the particle impurities will be crushed more thoroughly while being extruded and broken, thereby further improving the rate of impurity elimination.

[0049] In one of the more preferred embodiments, the one-way component includes a sleeve 6 installed in the coupler 2, and the sleeve 6 is provided with a through hole through which water can flow. The inner wall of the coupler 2 is installed with a sealing rubber head 4 capable of closing or opening the through hole through a torsion spring 3. One end of the iron core 19 extends into the sleeve 6 and is in sealed sliding connection therewith.

[0050] The one-way component can refer to Figure 2 When the iron core 19 moves close to the coupler 2, the water pressure in the liquid replacement cavity 34 increases and pushes the sealing rubber head 4 open, realizing the communication of the sleeve 6 and the coupler 2, so that the internal water can be discharged. When the iron core 19 moves close to the hollow tube 25, the space in the liquid replacement cavity 34 becomes smaller, and the sealing rubber head 4 closes the through hole under the action of the torsion spring 3, while the air pressure in the liquid replacement cavity 34 decreases, and the water is sucked in through the flow channel of the iron core 19.

[0051] In one of the more preferred embodiments, the inner wall of the flow channel of the iron core 19 is connected with a tension spring 17, and one end of the tension spring 17 close to the sealing rubber head 4 is fixed with a valve core 16. The valve core 16 has a tapered protruding portion extending from one end of the flow channel, and the maximum diameter of the tapered protruding portion is greater than the inner diameter of the flow channel.

[0052] The iron core 19 can refer to Figure 2 When the iron core 19 moves close to the coupler 2, the tapered protruding portion on the valve core 16 will close the flow channel, so that the water in the liquid replacement cavity 34 can be discharged through the through hole on the sleeve 6;

[0053] When the iron core 19 moves close to the hollow tube 25, the air pressure in the liquid replacement cavity 34 decreases, and in cooperation with the water pressure in the cylindrical tube 24, the valve core 16 can overcome the tension of the tension spring 17 to open the flow channel, so that water can flow into the liquid replacement cavity 34, and the water flow is unidirectional.

[0054] In one of the more preferred embodiments, the electromagnetic component includes a skeleton 13 sleeved on the periphery of the cylindrical tube 24, and a short magnetic yoke ring 21, a bushing 22 and a long magnetic yoke ring 23 are sequentially arranged between the skeleton 13 and the cylindrical tube 24.

[0055] The electromagnetic assembly further includes a coil housing 14 mounted on the periphery of the skeleton 13 , an enameled wire 15 is mounted between the coil housing 14 and the skeleton 13 , and a contact piece 10 is also mounted on the coil housing 14 .

[0056] The enameled wire 15 can be energized through the contact piece 10. When the enameled wire 15 is energized, the iron core 19 will overcome the elastic force of the second compression spring 20 under the action of the electromagnetic force and move toward the direction close to the empty tube 25 until the electromagnetic force applied to the iron core 19 is equal to the elastic force of the second compression spring 20. The movement distance of the iron core 19 reaches a maximum value. When the electromagnetic force disappears, the iron core 19 will reset and move under the elastic force of the second compression spring 20. In this way, when the electromagnetic force disappears periodically, the second compression spring 20 can be used to drive the iron core 19 to perform piston movement in the cylindrical tube 24 to complete the water suction and drainage process of the water pump.

[0057] In one of the more preferred embodiments, a first gasket 5, an O-ring 7, a sealing ring 8 and a second gasket 9 are sequentially arranged between the sleeve 6 and the cylindrical tube 24, and a first compression spring 18 is installed between the second gasket 9 and the stepped surface of the outer ring of the iron core 19.

[0058] When the iron core 19 moves under the action of the electromagnetic force, its maximum displacement is when the electromagnetic force is equal to the elastic force of the second compression spring 20. When the iron core 19 resets and moves under the elastic force of the second compression spring 20, the upward movement of the iron core 19 will be affected by the joint action of the first compression spring 18 and the second compression spring 20. The first compression spring 18 balances the elastic force of the second compression spring 20, so that the movement stroke of the iron core 19 remains stable, thereby keeping the starting flow and ending flow of the water pump consistent and maintaining the stability of the water pump flow. This structure only needs to add the first compression spring 18 to realize the control and regulation of the water pump flow, without the need to rely on PCB frequency modulation to control the water pump flow. It is simple and easy to implement and also reduces costs.

[0059] In one of the more preferred embodiments, a push rod 32 is fixed to one end of the valve core 16 extending out of the flow channel, and the diameter of the push rod 32 is smaller than the inner diameter of the through hole in the sleeve 6 .

[0060] During normal pumping and drainage, the push rod 32 on the valve core 16 will not touch the sealing rubber head 4, avoiding damage to the sealing rubber head 4. When the water pump is not pumping water, the sealing rubber head 4 is adhered to the sleeve 6. At this time, the water pump continuously dry-pumps. Due to the lack of liquid resistance in the liquid exchange chamber 34, the stroke of the iron core 19 will increase, and the moving distance of the valve core 16 will also increase accordingly. At this time, the moving distance of the push rod 32 increases, allowing it to pass through the through hole and push away the sealing rubber head 4 that is adhered to the sleeve 6, so that the water pump can work normally.

[0061] In one of the more preferred embodiments, the tapered protrusion surface of the valve core 16 is provided with a spiral flow guide groove 33, and when the tapered protrusion of the valve core 16 is in contact with the flow passage opening of the iron core 19, the spiral flow guide groove 33 is not in communication with the flow passage.

[0062] As can be seen from the foregoing, the particulate impurities filtered out by the water filtering net 27 will enter the cylindrical tube 24 after being crushed, and in order to avoid the deposition of these small substances in the liquid replacement cavity 34, the spiral flow guide groove 33 is provided, and when the valve core 16 opens the flow passage of the iron core 19, water will enter the liquid replacement cavity 34 along the spiral flow guide groove 33, and the deposited substances in the liquid replacement cavity 34 will be stirred up by the rotation thereof, preventing them from adhering to the inner wall, so that they will be discharged together with the next drainage from the coupler 2, avoiding the accumulation of small particles in the liquid replacement cavity 34 and affecting the stroke of the iron core 19.

[0063] In one of the more preferred embodiments, the sealing rubber head 4 is made of PTEE material.

[0064] The PTFE material has the characteristics of wear resistance, high temperature resistance, relatively stable size, and resistance to acid and alkali solutions. When it is subjected to high-speed reciprocating motion, the PTFE sealing ring is wear-resistant and has stable size, so the water pump has relatively good stability and continuity of flow. Moreover, since users now like to add some fragrance or the like solution to the water, the solution has a relatively high acid and alkali degree, and conventional rubber materials will be quickly corroded, leading to failure of the water pump. However, the PTFE material is resistant to acid and alkali, so it is not affected and the water pump can work normally.

[0065] In one of the more preferred embodiments, the pump body further comprises a holder 12 and a holder cover 11 which can be assembled and installed, and the coil shell 14 is assembled in the holder 12, and the coupler 2 is detachably installed by means of the screw 1.

[0066] In one of the more preferred embodiments, the O-ring 7 is also made of PTEE material.

[0067] In one of the more preferred embodiments, the stepped hole in the cylindrical tube 24 is provided with threads, and the hollow tube 25 is installed in the stepped hole by means of threaded connection. For details, please refer to Figure 2-4 By means of threaded connection, the hollow tube 25 can be conveniently disassembled and installed, facilitating subsequent maintenance and replacement.

[0068] The standard parts used in this embodiment can be directly purchased from the market, and the non-standard structural parts according to the description and drawings can also be directly processed according to the existing technical knowledge without any doubt. Moreover, the connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt the conventional models in the existing technology, so specific descriptions are not made here.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A micro electromagnetic water pump, comprising a pump body, wherein the pump body has a cylindrical tube (24) for water inlet and a connector (2) for water outlet, characterized in that: Also includes: An empty pipe (25) is installed in a stepped hole near the water inlet in the cylindrical pipe (24), a telescopic pipe (26) is slidably installed in the empty pipe (25), and a water filter net (27) is provided at one end of the telescopic pipe (26) located in the empty pipe (25), an inner ring cavity (28) is further provided on the inner wall of the empty pipe (25), and an extrusion spring (29) is connected between the telescopic pipe (26) and the inner ring cavity (28); A one-way component, arranged in the connector (2) and capable of only allowing water to flow out of the connector (2) in one direction; An iron core (19) is installed in the cylindrical tube (24), the iron core (19) having a flow channel, and the flow channel can only allow water to flow in one direction from the cylindrical tube (24) to the connector (2), and a second compression spring (20) is connected between the side of the iron core (19) close to the water inlet of the cylindrical tube (24) and the inner step of the cylindrical tube (24); The electromagnetic assembly cooperates with the second compression spring (20) to control the iron core (19) to perform piston motion in the cylindrical tube (24), and utilizes pressure changes to draw water from the cylindrical tube (24) and discharge it from the connector (2); The water filter (27) is configured to be in an arcuate or conical shape, and the protruding portion protrudes into the inner ring cavity (28); An oblique groove (31) is formed on the inner wall of the hollow tube (25), and a pin block (30) is fixed on the outer wall of the telescopic tube (26) and inserted into and slidably installed in the oblique groove (31). The spiral direction of the oblique groove (31) is the same as the spiral direction of the extrusion spring (29).

2. The micro electromagnetic water pump according to claim 1, characterized in that: The one-way assembly comprises a sleeve (6) installed in a connector (2), and the sleeve (6) is provided with a through hole for water to flow through, and a sealing rubber head (4) capable of closing or opening the through hole is installed on the inner wall of the connector (2) via a tower spring (3), and one end of the iron core (19) extends into the sleeve (6) and is sealed and slidably connected thereto.

3. The micro electromagnetic water pump according to claim 2, characterized in that: The inner wall of the flow channel of the iron core (19) is connected to a tension spring (17), and a valve core (16) is fixed to one end of the tension spring (17) close to the sealing rubber head (4). The end of the valve core (16) extending out of the flow channel has a conical protrusion, and the maximum diameter of the conical protrusion is greater than the inner diameter of the flow channel.

4. The micro electromagnetic water pump according to claim 1, characterized in that: The electromagnetic assembly comprises a skeleton (13) sleeved on the periphery of a cylindrical tube (24), wherein a short magnetic yoke ring (21), a bushing (22) and a long magnetic yoke ring (23) are sequentially arranged between the skeleton (13) and the cylindrical tube (24); The electromagnetic assembly further comprises a coil housing (14) mounted on the periphery of the frame (13), an enameled wire (15) is mounted between the coil housing (14) and the frame (13), and a contact piece (10) is also mounted on the coil housing (14).

5. The micro electromagnetic water pump according to claim 2, characterized in that: A first gasket (5), an O-ring (7), a sealing ring (8) and a second gasket (9) are sequentially arranged between the sleeve (6) and the cylindrical tube (24), and a first compression spring (18) is installed between the second gasket (9) and the stepped surface of the outer ring of the iron core (19).

6. The micro electromagnetic water pump according to claim 3, characterized in that: A push rod (32) is fixed to one end of the valve core (16) extending out of the flow channel, and the diameter of the push rod (32) is smaller than the inner diameter of the through hole on the sleeve (6).

7. The micro electromagnetic water pump according to claim 3, characterized in that: A spiral guide groove (33) is provided on the surface of the conical protrusion of the valve core (16), and when the conical protrusion of the valve core (16) contacts the flow passage opening of the iron core (19), the spiral guide groove (33) will not communicate with the flow passage.

8. The micro electromagnetic water pump according to claim 2, characterized in that: The sealing rubber head (4) is made of PTFE material.

9. The micro electromagnetic water pump according to claim 4, characterized in that: The pump body further comprises a retaining frame (12) and a retaining frame cover (11) that can be assembled and installed, and the coil housing (14) is assembled in the retaining frame (12).

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