Electromagnetic pump

Abstract

The electromagnetic pump comprises a pump body, the pump body comprises a shell, a first spring, an iron core and a valve element, the first spring, the iron core and the valve element are arranged in the shell, the valve element is fixed to the shell, at least part of the valve element is located in the iron core and is in sealing fit with the iron core, the electromagnetic pump further comprises a second spring abutting against the position between the iron core and the valve element, and the iron core can move in the axial direction relative to the valve element. The iron core and the valve element are independently arranged, at least part of the valve element is located in the iron core and matched with the iron core in a sealed mode, axial miniaturization of products can be achieved, and the space utilization rate of parts is increased.

Description

Technical Field

[0001] This application relates to the technical field of pump equipment, and particularly to an electromagnetic pump. Background Art

[0002] An electromagnetic pump is a liquid pump that uses alternating current to provide working power to achieve liquid output. The electromagnetic part is energized to provide an electromagnetic force driving force for the iron core. The iron core has a long rod structure with an inlet channel and a transverse hole. During the movement of the iron core, the medium can repeatedly pass through the inlet channel and the transverse hole to balance the pressure difference.

[0003] For those skilled in the art, it is necessary to miniaturize the product and improve the space utilization rate as much as possible. Summary of the Invention

[0004] The purpose of this application is to provide an electromagnetic pump that can achieve axial miniaturization of the product and improve the space utilization rate.

[0005] To solve the above technical problems, this application provides an electromagnetic pump, including a pump body. The pump body includes a housing, a first spring, an iron core, and a valve core disposed in the housing. The valve core is fixed to the housing. At least a part of the valve core is located inside the iron core and is sealingly fitted with the iron core. The electromagnetic pump further includes a second spring abutted between the iron core and the valve core. The iron core can move axially relative to the valve core.

[0006] The electromagnetic pump provided by this application, by independently arranging the iron core and the valve core, with at least a part of the valve core located inside the iron core and sealingly fitted with the iron core, compared with the installation and cooperation of the iron core structure with a long rod structure and other components in the background art, can achieve axial miniaturization of the product and improve the space utilization rate of the components. Brief Description of the Drawings

[0007] Figure 1 is a cross-sectional view of an electromagnetic pump provided by an embodiment of this application;

[0008] Figure 2 is Figure 1 an enlarged view of A in

[0009] Figure 3 is Figure 1 a cross-sectional view of the iron core in

[0010] Figure 4 is Figure 1 a schematic structural view of the valve core in

[0011] Figure 5 is Figure 4 a cross-sectional view of

[0012] Figure 6 is Figure 1 a cross-sectional view of the bushing in

[0013] Appended Figures 1-6 In the attached drawings, the reference numerals are explained as follows:

[0014] 10 Housing, 101 Upper cavity part, 102 Lower cavity part; 20 Electromagnetic part;

[0015] 1 First spring;

[0016] 2 Sleeve, 21 Medium inlet, 22 First flanging structure;

[0017] 3 Outlet part, 31 Medium outlet, 32 Mounting groove;

[0018] 4 Iron core, 41 First section, 42 Second section, 43 Inlet channel, 44 First groove part, 45 Side wall, 46 Guide structure;

[0019] 5 Valve core, 51 Second groove part, 52 First hole part, 53 Second hole part, 54 First sealing groove, 55 Second flanging structure, 56 Guide groove;

[0020] 6 Piston, 61 Piston spring;

[0021] 7 Check valve, 71 Check ball, 72 Check spring;

[0022] 8 Bushing, 81 Step structure;

[0023] 91 First sealing ring, 92 Second sealing ring, 93 Third sealing ring, 94 Fourth sealing ring;

[0024] 11 Second sealing groove;

[0025] 12 Third sealing groove;

[0026] 13 Second spring;

[0027] 14 Fastener;

[0028] 15 Outlet pipe, 151 Limit structure. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] The embodiments of the present application provide an electromagnetic pump, which can be applied to coffee machines, medical devices, electric irons, etc. The electromagnetic pump includes a pump body and an electromagnetic part 20, as Figure 1As shown in the figure, the pump body includes a housing 10, a first spring 1, an iron core 4, and a valve core 5 disposed within the housing 10. Among them, the valve core 5 is fixed to the housing 10, and the electromagnetic unit 20 is used to provide an electromagnetic force to the iron core 4, enabling the iron core 4 to move axially within the housing 10. The first spring 1 is clamped between the top end of the iron core 4 and the housing 10, and can drive the iron core 4 to move through elastic force.

[0031] Among them, the valve core 5 is at least partially located within the iron core 4 and is in sealed cooperation with the iron core 4. The electromagnetic pump further includes a second spring 13 that abuts between the iron core 4 and the valve core 5, and the iron core 4 can move axially relative to the valve core 5. Since the iron core 4 and the valve core 5 are independently arranged, and the valve core 5 is at least partially located within the iron core 4, compared with the solution having an iron core with a long rod structure, the axial miniaturization of the electromagnetic pump can be achieved, and the utilization rate of the internal supplementary space of the electromagnetic pump can be improved.

[0032] Moreover, during the movement of the iron core 4, the second spring 13 can buffer it, reducing vibration and thus reducing noise. At the same time, the setting of the second spring 13 can also avoid the noise generated by the collision between the iron core 4 and the valve core 5 due to the increased stroke of the iron core 4 during no-load operation.

[0033] The inner cavity of the housing 10 includes an upper cavity portion 101 and a lower cavity portion 102. The first spring 1 is located within the upper cavity portion 101. The iron core 4 is axially provided with a first section 41 and a second section 42. Among them, the first section 41 is disposed within the upper cavity portion 101, and the second section 42 is partially located within the upper cavity portion 101 and partially located within the lower cavity portion 102.

[0034] A guiding structure 46 (as shown in the figure) is further provided at the top end of the first section 41. The bottom of the first spring 1 is sleeved outside the guiding structure 46. The guiding structure 46 can provide guiding and limiting effects on the first spring 1 to ensure the stable position of the first spring 1. As shown in the figure and the figure, the first section 41 is axially provided with an inlet passage 43. The bottom wall of the second section 42 is provided with a first groove portion 44. The bottom of the side wall 45 of the first groove portion 44 is located within the lower cavity portion 102. That is to say, the side wall 45 of the first groove portion 44 is partially located within the upper cavity portion 101 and partially located within the lower cavity portion 102. Figure 3 shown), the bottom of the first spring 1 is sleeved outside the guiding structure 46. The guiding structure 46 can provide guiding and limiting effects on the first spring 1, ensuring the stable position of the first spring 1. As shown in the figure and the figure, the first section 41 is axially provided with an inlet passage 43. The bottom wall of the second section 42 is provided with a first groove portion 44. The bottom of the side wall 45 of the first groove portion 44 is located within the lower cavity portion 102. That is to say, the side wall 45 of the first groove portion 44 is partially located within the upper cavity portion 101 and partially located within the lower cavity portion 102. Figure 2 and Figure 3 shown, the first section 41 is axially provided with an inlet passage 43. The bottom wall of the second section 42 is provided with a first groove portion 44. The bottom of the side wall 45 of the first groove portion 44 is located within the lower cavity portion 102. That is to say, the side wall 45 of the first groove portion 44 is partially located within the upper cavity portion 101 and partially located within the lower cavity portion 102.

[0035] It should be noted that in the state shown in the figure and the figure, the upper cavity portion 101 is located above the lower cavity portion 102, and the iron core 4 is located above the valve core 5. The up, down, etc. mentioned later are also based on this state, that is, based on the state of each component in the figure or the positional relationship between them. The introduction of orientation words is only for the convenience of describing and understanding the technical solution and does not constitute a limitation on the protection scope. Figure 1 and Figure 2 shown, the upper cavity portion 101 is located above the lower cavity portion 102, and the iron core 4 is located above the valve core 5. The up, down, etc. mentioned later are also based on this state, that is, based on the state of each component in the figure or the positional relationship between them. The introduction of orientation words is only for the convenience of describing and understanding the technical solution and does not constitute a limitation on the protection scope.

[0036] The top of the valve core 5 is located within the first groove portion 44. Between the valve core 5 and the side wall 45, and between the side wall 45 and the housing 10, circumferential seals are respectively formed. An upper cavity portion 101 is formed above the seal, and a lower cavity portion 102 is formed below the seal. With such a setting, the forming process of the upper cavity portion 101 and the lower cavity portion 102 can be simplified.

[0037] The bottom wall of the valve core 5 is further provided with a second groove portion 51. A first hole portion 52 is provided through the top wall of the second groove portion 51, and a second hole portion 53 is provided through the circumferential wall of the second groove portion 51. The upper cavity portion 101 and the first groove portion 44 are communicated through the first hole portion 52, and the second groove portion 51 and the lower cavity portion 102 are communicated through the second hole portion 53. As Figure 4 and Figure 5 shown, four second hole portions 53 are circumferentially and spacedly provided on the side wall of the second groove portion 51. Of course, the number of the second hole portions 53 can also be one, two, three or more. At least two second hole portions 53 are convenient for quickly balancing the pressure differences at various places within the lower cavity portion 102.

[0038] The electromagnetic pump further includes a piston 6 and a piston spring 61 provided within the second groove portion 51. The piston 6 is used to block the first hole portion 52. The piston spring 61 is provided between the piston 6 and the housing 10. The piston spring 61 is used to provide power for the piston 6 so that the piston 6 blocks the first hole portion 52. The piston 6 can move axially along the second groove portion 51. With such a setting, the groove wall of the second groove portion 51 can provide a guiding effect on the piston 6 and the piston spring 61, ensuring that the piston 6 can accurately cooperate with and disengage from the first hole portion 52.

[0039] A medium inlet 21 is provided at the top end of the housing 10, and a medium outlet 31 is provided at the bottom end of the housing 10. A check valve 7 is further provided at the medium outlet 31. It is not difficult to understand that the flow direction of the check valve 7 is from top to bottom.

[0040] Specifically, after the electromagnetic part 20 is powered on, the electromagnetic part 20 can provide an electromagnetic force to the iron core 4, causing the iron core 4 to move upward and compress the first spring 1, storing elastic potential energy. As the iron core 4 moves upward, the medium above the iron core 4 can enter the space above the valve core 5 in the first groove part 44 through the inlet channel 43 to balance the pressures at various parts of the upper cavity part 101. At the same time, as the iron core 4 moves upward, the side wall 45 of the first groove part 44 moves upward, causing the volume of the side wall 45 of the first groove part 44 in the upper cavity part 101 to increase and the volume of the side wall 45 of the first groove part 44 in the lower cavity part 102 to decrease. The pressure in the upper cavity part 101 increases, the pressure in the lower cavity part 102 decreases, and a pressure difference is generated between the upper cavity part 101 and the lower cavity part 102. The pressure in the upper cavity part 101 is relatively large, and it pushes the piston 6 to disengage the piston 6 from the first hole part 52. The one-way valve 7 is in a closed state. At this time, the medium in the upper cavity part 101 can enter the lower cavity part 102 through the first hole part 52 and fill the lower cavity part 102 through the second hole part 53.

[0041] After the electromagnetic part 20 is powered off, the electromagnetic part 20 no longer provides an electromagnetic force to the iron core 4. At this time, the first spring 1 can push the iron core 4 to move downward. During the downward movement of the iron core 4, the medium in the space above the valve core 5 in the first groove part 44 can enter the space above the iron core 4 along the inlet channel 43 to balance the pressures at various parts in the upper cavity part 101. At the same time, as the iron core 4 moves downward, the volume of the side wall 45 of the first groove part 44 in the upper cavity part 101 is smaller, and the volume of the side wall 45 of the first groove part 44 in the lower cavity part 102 increases. The pressure in the upper cavity part 101 decreases, the pressure in the lower cavity part 102 increases, and a pressure difference is generated between the upper cavity part 101 and the lower cavity part 102. The pressure in the lower cavity part 102 is relatively large, and it can push the piston 6 to cooperate with the first hole part 52 for sealing. At this time, the upper cavity part 101 and the lower cavity part 102 are not connected, the one-way valve 7 is opened, and the medium in the lower cavity part 102 can flow out along the medium outlet 31.

[0042] By filtering the alternating current provided to the electromagnetic part 20, the on-off of the current can be achieved more than fifty times per second, thereby realizing continuous water pumping of the electromagnetic pump.

[0043] In this embodiment, during the movement of the iron core 4, the medium in the upper cavity part 101 can reciprocally pass through the inlet channel 43 to balance the pressures at various parts in the upper cavity part 101. After a small part of the medium enters the lower cavity part 102, it balances the pressures at various parts in the lower cavity part 102 by passing through the second hole part 53. Compared with the solution of setting an inlet channel 43 and a transverse hole in the iron core 4, the flow rate of the medium passing through the second hole part 53 can be reduced, thereby reducing the resistance of the medium flow in the electromagnetic pump, reducing the requirement for electromagnetic force, and reducing the noise.

[0044] In this embodiment, the outer wall surfaces of the first section 41 and the second section 42 are both cylindrical surfaces, and the outer diameters of the first section 41 and the second section 42 are equal. That is to say, the iron core 4 is a structure with an equal diameter arranged along the axial direction. With such a setting, the magnetic conduction cross-section between the iron core 4 and the magnetic conduction ring of the electromagnetic part 20 can be increased, the magnetic resistance between the iron core 4 and the magnetic conductor of the magnetic conduction part 20 can be reduced, and the electromagnetic force can be improved. Thus, the requirements for the electromagnetic part 20 can be reduced. For example, in the case of the same electromagnetic force requirement, the number of coils in the electromagnetic part 20 can be reduced, and the cost can be lowered.

[0045] As Figure 4 and Figure 5 shown, a guiding groove 56 is further provided at the top end of the valve core 5, and the bottom end of the second spring 13 is located in the guiding groove 56. The setting of the guiding groove 56 can provide guidance for the second spring 13 and ensure the stability of the second spring 13.

[0046] Of course, in this embodiment, there is no limitation on the specific structure of the second section 42. For example, it can also be that a seal is directly formed between the valve core 5 and the housing 10. The valve core 5 is provided with a perforation, and the bottom end of the second section 42 can pass through the perforation into the lower cavity 102 and be sealed circumferentially between the second section 42 and the perforation. And setting the second section 42 as the structure of the first groove portion 44 can simplify the overall structure and facilitate sealing when the side wall 45 of the first groove portion 44 is located between the valve core 5 and the housing 10.

[0047] As Figure 1 shown, the one-way valve 7 includes a check ball 71 and a check spring 72. An outlet pipe 15 is externally connected to the outlet portion 3, and a limiting structure 151 is provided in the outlet pipe 15. The check spring 72 is arranged between the check ball 71 and the limiting structure 151. After being energized, when the iron core 4 moves upward, the pressure in the lower cavity 102 decreases. The check ball 71 moves upward under the action of the pressure difference and the check spring 72 and cooperates with the medium outlet 31 to block the medium outlet 31. After being powered off, when the iron core 4 moves downward, the pressure in the lower cavity 102 increases. The check ball 71 moves downward under the action of the pressure difference and disengages from the medium outlet 31, and at the same time compresses the check spring 72. Controlling the opening and closing of the one-way valve 7 through the pressure difference can simplify the overall structure and reduce the cost.

[0048] As Figure 2 shown, a first sealing ring 91 is provided circumferentially between the outer wall of the valve core 5 and the inner wall of the first groove portion 44, and a second sealing ring 92 is provided circumferentially between the outer wall of the first groove portion 44 and the inner wall of the housing 10. The setting of the first sealing ring 91 and the second sealing ring 92 can ensure the sealing between the upper cavity 101 and the lower cavity 102.

[0049] Further, a first sealing groove 54 for installing a first sealing ring 91 is provided along the circumferential direction on the outer wall of the valve core 5. Through the arrangement of the first sealing groove 54, the installation stability of the first sealing ring 91 can be ensured. Similarly, a second sealing groove 11 for installing a second sealing ring 92 can also be provided on the inner wall of the housing 10 to ensure the installation stability of the second sealing ring 92.

[0050] As Figure 1 shown, the housing 10 includes a sleeve 2 and an outlet portion 3 that are fixedly connected and communicated. Among them, a medium inlet 21 is provided at the top end of the sleeve 2, the bottom end of the sleeve 2 is fixedly sealed with the outlet portion 3 along the circumferential direction, a medium outlet 31 is provided on the outlet portion 3, and a check valve 7 is provided at the medium outlet 31. An installation groove 32 is provided at the top of the outlet portion 3, and the bottom of the sleeve 2 is fixedly sealed with the opening end of the installation groove 32 along the circumferential direction. When the housing 10 is arranged to include the sleeve 2 and the outlet portion 3, it is convenient for the overall disassembly and assembly operation of the electromagnetic pump.

[0051] The electromagnetic portion 20 is fixed to the housing 10. Specifically, a first flanging structure 22 is provided at the bottom end of the sleeve 2 and extends radially outward. The electromagnetic portion 20 is sleeved outside the sleeve 2, and the bottom of the electromagnetic portion 20 is fixed to the outlet portion 3 through a fastener 14, and the first flanging structure 22 is clamped between the electromagnetic portion 20 and the outlet portion 3. That is to say, in this embodiment, there is no direct fixation between the sleeve 2 and the outlet portion 3, but indirect fixation is achieved through the electromagnetic portion 20. Specifically, after the components inside the sleeve 2, the outlet portion 3, and the housing 10 are assembled, the electromagnetic portion 20 is sleeved outside the sleeve 2 from top to bottom and fixed to the outlet portion 3 to clamp the first flanging structure 22. Compared with the scheme of directly fixing between the sleeve 2 and the outlet portion 3 and then directly fixing between the electromagnetic portion 20 and the sleeve 2, the overall structure and disassembly and assembly operation can be significantly simplified.

[0052] A bushing 8 is also provided in the installation groove 32. A second flanging structure 55 is provided at the bottom end of the valve core 5 and extends radially outward. The top end of the bushing 8 abuts against the first flanging structure 22, and the bottom end of the bushing 8 abuts against the second flanging structure 55. The arrangement of the bushing 8 can ensure the installation accuracy and stability of the valve core 5 and the iron core 4.

[0053] As Figure 2 and Figure 6 shown, a stepped structure 81 is provided along the circumferential direction at the top of the bushing 8. The stepped surface, side wall surface of the stepped structure 81, and the lower end surface of the first flanging structure 22 enclose to form the above-mentioned second sealing groove 11, which is used for installing the second sealing ring 92. Such an arrangement facilitates the installation stability of the second sealing ring 92.

[0054] As Figure 2As shown, a third sealing groove 12 is further provided along the circumferential direction of the mounting groove 32 on the end face of the opening end of the outlet portion 3. A third sealing ring 93 is installed in the third sealing groove 12, and the third sealing ring 93 is in contact with the lower end face of the first flanging structure 22 to further ensure the sealing performance between the sleeve 2 and the outlet portion 3. Further, a fourth sealing ring 94 is clamped along the circumferential direction between the corner of the electromagnetic portion 20 and the bottom of the sleeve 2 (i.e., the included angle between the outer wall of the sleeve 2 and the upper end face of the first flanging structure 22) to ensure the sealing performance and installation stability.

[0055] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An electromagnetic pump, characterized in that, It includes a pump body, the pump body includes a housing (10) and a first spring (1), an iron core (4) and a valve core (5) arranged in the housing (10). The valve core (5) is fixed to the housing (10), at least part of the valve core (5) is located inside the iron core (4) and is in sealing cooperation with the iron core (4). The electromagnetic pump further includes a second spring (13) abutted between the iron core (4) and the valve core (5), and the iron core (4) can move axially relative to the valve core (5).

2. The electromagnetic pump according to claim 1, wherein The housing (10) includes an upper cavity part (101) and a lower cavity part (102) that are independent of each other. The iron core (4) is provided with a first section (41) and a second section (42) along the axial direction. The first spring (1) and the first section (41) are arranged in the upper cavity part (101). The first section (41) is provided with an inlet channel (43) axially penetrating through it. The second section (42) is partially located in the upper cavity part (101) and partially located in the lower cavity part (102). A seal is formed circumferentially between the outer peripheral wall of the valve core (5) and the housing (10). The bottom wall of the valve core (5) is provided with a second groove part (51). The top wall of the second groove part (51) is provided with a first hole part (52) penetrating through it. The peripheral wall of the second groove part (51) is provided with a second hole part (53) penetrating through it. It further includes a piston (6) and a piston spring (61) arranged in the second groove part (51). The piston spring (61) is used to drive the piston (6) to block the first hole part (52).

3. The electromagnetic pump according to claim 2, characterized in that, The bottom wall of the second section (42) is provided with a first groove part (44). The side wall (45) of the first groove part (44) is partially located in the upper cavity part (101) and partially located in the lower cavity part (102). The top of the valve core (5) is located in the first groove part (44), and a first sealing ring (91) is clamped circumferentially between the valve core (5) and the side wall (45). A second sealing ring (92) is clamped circumferentially between the side wall (45) and the inner wall of the housing (10).

4. The electromagnetic pump according to claim 3, characterized in that, The outer wall of the valve core (5) is provided with a first sealing groove (54) for installing the first sealing ring (91) circumferentially. The inner wall of the housing (10) is provided with a second sealing groove (11) for installing the second sealing ring (92) circumferentially.

5. The electromagnetic pump according to claim 3, characterized in that, The housing (10) includes a sleeve (2) and an outlet part (3). The bottom of the sleeve (2) is fixed to the outlet part (3) and is sealed circumferentially.

6. The electromagnetic pump according to claim 5, characterized in that, It further includes an electromagnetic part (20). The electromagnetic part (20) is sleeved outside the sleeve (2). The bottom end of the sleeve (2) extends radially outward to form a first flanging structure (22). The electromagnetic part (20) is fixed to the outlet part (3), and the first flanging structure (22) is clamped between the electromagnetic part (20) and the outlet part (3).

7. The electromagnetic pump according to claim 6, characterized in that, The top of the outlet part (3) is provided with an installation groove (32), a bushing (8) is further arranged inside the installation groove (32), a second flanging structure (55) is arranged at the bottom end of the valve core (5) extending radially outwards, the top end of the bushing (8) abuts against the first flanging structure (22), and the bottom end of the bushing (8) abuts against the second flanging structure (55).

8. The electromagnetic pump according to claim 7, wherein, A step structure (81) is arranged circumferentially at the top of the bushing (8), and a second sealing groove (11) for installing a second sealing ring (92) is formed by enclosing the step surface of the step structure (81), the side wall surface of the step structure (81) and the lower end surface of the first flanging structure (22).

9. The electromagnetic pump according to any one of claims 2-8, characterized in that, The outer wall surfaces of the first section (41) and the second section (42) are both cylindrical surfaces, and the outer diameters of the first section (41) and the second section (42) are equal.

10. The electromagnetic pump according to any one of claims 5-8, characterized in that, The one-way valve (7) includes a check ball (71) and a check spring (72), an outlet pipe (15) is externally connected to the outlet part (3), a limiting structure (151) is arranged inside the outlet pipe (15), and the check spring (72) is arranged between the check ball (71) and the limiting structure (151).

11. The electromagnetic pump according to claims 2-8, characterized in that, At least two second hole parts (53) are arranged at intervals along the circumferential direction of the side wall of the second groove part (51).

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