Low-noise electromagnetic pump

Abstract

The utility model relates to the technical field of electromagnetic pumps, and discloses a low-noise electromagnetic pump which comprises a shell, a containing cavity is formed in the shell, a pipe body is arranged on the shell in a penetrating mode, one end of the pipe body is connected with a feeding connector, the other end of the pipe body is connected with a discharging connector, a piston is arranged in the pipe body, and the end, facing the discharging connector, of the feeding connector is connected with a sleeve. The end, facing the feeding connector, of the piston is provided with a material passing hole, the end, facing the feeding connector, of the piston is provided with an elastic gasket, the end, facing the piston, of the sleeve is provided with a first guide inclined face, and in the process that the piston moves towards the feeding connector, the first guide inclined face of the sleeve penetrates through the elastic gasket and is inserted into the material passing hole. As the opening area, close to the elastic washer, of the material passing hole is larger than the minimum opening area of the elastic washer, the elastic washer collides with the first guide slope earlier than the inner wall of the material passing hole, the elastic washer deforms, the piston is buffered, and noise generated by the piston and the sleeve is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic pumps, and in particular to a low-noise electromagnetic pump. Background Art

[0002] A coffee machine is a core piece of equipment for brewing coffee. Widely used in homes, businesses, offices, restaurants, and more, it meets drinking needs in a variety of settings. A coffee machine heats and pressurizes water, converting it into a high-temperature, high-pressure stream, allowing it to evenly penetrate the coffee grounds and extract the flavor. It automates the entire coffee brewing process, including grinding, pressing, filling, brewing, and removing grounds.

[0003] The electromagnetic pump provides pressure to push hot water to the extraction mechanism for coffee extraction and is one of the most important components of a coffee machine. The electromagnetic pump used in coffee machines is typically a reciprocating piston electromagnetic pump. It comprises a housing with a perforation extending through a tube. One end of the tube is fixedly connected to the water inlet pipe, and the other end is connected to the water outlet pipe. Within the tube are a piston, a spring, and a sleeve for smooth fluid transport. One end of the sleeve is connected to the water inlet pipe, and the piston is located at the end of the sleeve away from the water inlet pipe.

[0004] During coffee machine operation, water flows from the water inlet pipe, through the sleeve, and into the piston. The electromagnetic pump uses electromagnetic force to drive the piston back and forth, compressing the water and discharging it through the discharge connector. During this high-speed reciprocating motion, the piston and sleeve repeatedly collide, causing a loud noise. Utility Model Content

[0005] In order to improve the problem of high noise caused by collision with other structures during piston movement, the present application provides a low-noise electromagnetic pump.

[0006] This application provides a low-noise electromagnetic pump, which adopts the following technical solution:

[0007] The injector tube has a through hole, and the injector tube has a through hole, and the injector tube has a through hole, and the injector tube has a through hole, and the injector tube has a through hole.

[0008] By adopting the above technical solution, when the piston moves toward the feed joint, the first guide bevel of the sleeve passes through the elastic washer and is inserted into the feed hole. Since the opening area of ​​the feed hole close to the elastic washer is larger than the minimum opening area of ​​the elastic washer, the elastic washer collides with the first guide bevel before the inner wall of the feed hole, causing the elastic washer to deform, cushioning the piston and reducing the probability of collision between the piston and the sleeve. If the piston and the sleeve collide, the collision force between the piston and the sleeve is reduced, thereby reducing the noise generated by the piston and the sleeve.

[0009] Optionally, the opening size of the elastic washer gradually increases in a direction approaching the feed connector, and when the elastic washer contacts the sleeve, the inner wall of the elastic washer fits with the first guide slope.

[0010] By adopting the above technical solution, the contact area between the elastic washer and the first guide inclined surface is increased, noise is reduced, and water is better transported from the sleeve to the piston.

[0011] Optionally, a limiting ring groove for inserting an elastic gasket is provided on the side of the piston facing the feed joint.

[0012] By adopting the above technical solution, the limiting ring groove can limit the position of the elastic washer, making it difficult for the elastic washer to move along the axis of the material through hole, so that the elastic washer surrounds the axis of the material through hole.

[0013] Optionally, a first buffer ring block is provided on the outer circumferential surface of the elastic gasket, a first spring is provided in the tube body, one end of the first spring is in contact with the feed joint, and the other end of the first spring is in contact with the first buffer ring block, a second buffer ring block is provided on the outer circumferential surface of the first buffer ring block, the second buffer ring block extends in the direction close to the feed joint, and the first spring is located in the second buffer ring block.

[0014] By adopting the above technical solution, the piston compresses the first spring during the movement toward the sleeve, causing the first spring to deform. When the first guide slope abuts the elastic washer, the first spring is compressed to the maximum extent, and the elastic force of the first spring forces the piston to reset. The first buffer ring block is located between the first spring and the piston. When the piston moves and collides with the spring, the first buffer ring block is deformed, playing a buffering role and reducing noise. The first spring applies a force to the first buffer ring block, so that the piston and the spring clamp the first buffer slider, making the position of the first buffer ring block difficult to move, thereby increasing the stability of the connection between the first buffer block and the elastic washer and the piston. The second buffer block limits the first spring to prevent horizontal movement when the first spring is deformed.

[0015] Optionally, a first fixed ring groove is formed on the first guide inclined surface, a buffer ring is provided in the first fixed ring groove, and the buffer ring extends out of the first fixed ring groove.

[0016] By adopting the above technical solution, the buffer ring collides with the inner wall of the material passage hole before the first guide slope, and the buffer ring is deformed, playing a buffering role, reducing the probability of the piston and the sleeve conflicting. If the piston and the sleeve conflict, the collision force between the piston and the sleeve is reduced, thereby reducing the noise generated by the piston and the sleeve.

[0017] Optionally, a first rubber block connecting the feed connector and the sleeve is provided between the two, the first rubber block is connected to the outer circumferential surface of the sleeve, and the end of the first rubber block away from the piston is connected to the feed connector.

[0018] By adopting the above technical solution, the first rubber block connects the sleeve and the feed joint, reducing the gap between the sleeve and the feed joint and improving the sealing; the first rubber block replaces the feed joint in contact with the first spring, reducing the wear of the feed joint.

[0019] Optionally, a second fixing ring groove is provided on the outer circumferential surface of the sleeve, a second rubber block is provided at one end of the first rubber block facing the sleeve, and the second rubber block is provided in the second fixing ring groove.

[0020] By adopting the above technical solution, the second rubber block is connected to the inner wall of the second fixed ring groove, which increases the contact area between the first rubber block and the sleeve and improves the firmness of the connection between the sleeve and the feed joint.

[0021] Optionally, a protective ring block is sleeved on the outer circumference of the sleeve, and a fixed ring block is provided on the outer circumference of the protective ring block, and the fixed ring block is located between the first rubber block and the first spring.

[0022] By adopting the above technical solution, the protective ring block has a buffering effect on the collision between the piston and the rubber layer, reducing noise; the fixed ring block limits the first spring, reducing the probability of horizontal displacement when the first spring is deformed.

[0023] Optionally, the piston comprises a feeding part located near one end of the sleeve, a fixed part arranged in the feeding connector, and a connecting part for connecting the feeding part and the fixed part, a sealing ring block is arranged outside the fixed part between the discharging connector and the pipe body, an installation ring block in contact with the sealing ring block is arranged outside the connecting part, an installation ring block in contact with the fixed part is arranged outside the fixed part, and installation ring pads are arranged on the outer circumferential surfaces of the two installation ring blocks, a second spring is arranged between the two installation ring pads, and the end faces of the two installation ring pads close to each other are in abutment with the second spring.

[0024] By adopting the technical scheme, when the second spring is in contact with the outer circumferential surface of the installation ring block, the movement of the second spring along the axis of the installation ring block is limited, the second spring is limited in position, the second spring is prevented from being in contact with the connecting part / fixed part, noise is less likely to be generated between the second spring and the piston, and the wear of the connecting part, the fixed part and the second spring is reduced.

[0025] To sum up, the present application has at least one of the following beneficial technical effects:

[0026] 1. During the movement of the piston towards the feeding connector, the first guide inclined surface of the sleeve passes through the elastic gasket and is inserted into the feeding hole. Since the opening area of the feeding hole close to the elastic gasket is larger than the minimum opening area of the elastic gasket, the elastic gasket collides with the inner wall of the feeding hole first, so that the elastic gasket is deformed, the piston is buffered, the probability of the piston colliding with the sleeve is reduced, and if the piston collides with the sleeve, the collision force of the piston and the sleeve is reduced, so that the noise generated by the piston and the sleeve is reduced.

[0027] 2. The protective ring block and the fixed ring block limit the first spring, so that the probability of the horizontal displacement of the first spring during the movement of the piston is reduced; the installation ring block limits the second spring, so that the probability of the horizontal displacement of the second spring during the movement of the piston is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0029] Figure 1 is a structural schematic view of the embodiment of the present application;

[0030] Figure 2 is a sectional view highlighting the structure of the positioning pipe;

[0031] Figure 3 is Figure 2 is an enlarged schematic view of part A in FIG. 8.

[0032] Figure 4 yes Figure 2 An enlarged schematic diagram of part B;

[0033] Figure 5 yes Figure 2 Enlarged schematic diagram of part C.

[0034] Figure 1: Shell; 2: Accommodating cavity; 21: First accommodating hole; 22: Second accommodating hole; 211: Positioning tube; 3: Tube body; 4: Retaining ring; 5: Feed connector; 6: Sealing ring block; 7: Discharge connector; 8: Cover; 9: Storage groove; 91: Through hole; 10: Piston; 101: Feed portion; 1011: Limiting ring groove; 1012: Second guiding slope; 102: Connecting portion; 103: Fixing portion; 104: Through hole Hole; 105, elastic washer; 106, first buffer ring block; 107, second buffer ring block; 108, protective ring block; 109, fixed ring block; 11, mounting ring block; 111, mounting ring gasket; 12, second spring; 13, sleeve; 131, first rubber block; 132, second fixed ring groove; 133, second rubber block; 134, first guide slope; 135, first fixed ring groove; 136, buffer ring; 14, first spring. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-5 This application is described in further detail.

[0036] This embodiment discloses a low noise electromagnetic pump. Figure 1 and Figure 2 A low-noise electromagnetic pump includes a housing 1 defining a housing chamber 2. A first housing hole 21 is defined at one end of the housing 1 and communicates with the housing chamber 2. A second housing hole 22 is defined at the other end of the housing 1 and communicates with the housing chamber 2. The second housing hole 22 is aligned with the first housing hole 21 and has a smaller diameter than the first housing hole 21.

[0037] Reference Figure 2 and Figure 3 A positioning tube 211 is passed through the first accommodating hole 21 , and one end of the positioning tube 211 facing the second accommodating hole 22 abuts against the inner wall of the accommodating cavity 2 .

[0038] Reference Figure 2 and Figure 3, a tube body 3 is provided in the positioning tube 211, and one end of the tube body 3 is inserted into the second accommodating hole 22. A retaining ring 4 is fixedly connected to the outer circumferential surface of the tube body 3, and the retaining ring 4 is located outside the shell 1. The retaining ring 4 abuts against the positioning tube 211 on the side facing the shell 1. A feed connector 5 is integrally formed at one end of the tube body 3, and the feed connector 5 is located on the side of the second accommodating hole 22 away from the first accommodating hole 21. A sealing ring block 6 is provided at the other end of the tube body 3, and the sealing ring block 6 is made of rubber material. A discharge connector 7 is provided on the side of the sealing ring block 6 away from the cover body 8. The discharge connector 7 is located on the side of the first accommodating hole 21 away from the second accommodating hole 22.

[0039] Reference Figure 2 The housing 1 has a cover 8 at one end near the discharge connector 7, which is bolted to the housing 1. A storage groove 9 is defined on the end of the cover 8 facing the housing 1. A through-hole 91 is defined in the inner wall of the storage groove 9, away from the opening. The tube 3 is inserted into the storage groove 9. The sealing ring block 6 and the discharge connector 7 are located within the storage groove 9. The end of the discharge connector 7, away from the cover 8, passes through the through-hole 91 and extends outside the cover 8.

[0040] Reference Figure 2 and Figure 3 A piston 10 , a mounting ring block 11 , a second spring 12 , a sleeve 13 and a first spring 14 are provided in the tube body 3 and reciprocate along the length direction of the tube body 3 .

[0041] Reference Figure 2 and Figure 5 One end of the sleeve 13 abuts the feed connector 5. A first rubber block 131 is fixedly connected to the outer circumference of the sleeve 13. The end of the first rubber block 131, away from the discharge connector 7, is connected to the feed connector 5. A second fixing annular groove 132 is defined on the outer circumference of the sleeve 13. A second rubber block 133 is fixedly connected within the second fixing annular groove 132. The outer circumference of the second rubber block 133 is connected to the first rubber block 131. The first and second rubber blocks 131, 133 are formed through an overmolding process.

[0042] Reference Figure 2 and Figure 4 A first guide slope 134 is defined on the end of the sleeve 13 away from the feed connector 5. This first guide slope 134 is located at the intersection of the end of the sleeve 13 closer to the piston 10 and the outer edge of the sleeve 13. A first retaining ring groove 135 is defined on the first guide slope 134. A buffer ring 136 is disposed within the first retaining ring groove 135 and extends beyond the first retaining ring groove 135. This buffer ring 136 is a rubber component.

[0043] Reference Figure 2 and Figure 3The piston 10 comprises a feeding part 101, a connecting part 102 and a fixing part 103. The fixing part 103 is fixedly connected to the feeding part 101 at one end thereof which is directed towards the feeding joint 5, and the fixing part 103 penetrates the sealing ring block 6 and is inserted into the discharging joint 7. The feeding part 101 is fixedly connected to the fixing part 103 at one end thereof which is directed towards the discharging joint 7, and the outer circumferential surface of the feeding part 101 is in abutment with the inner wall of the pipe body 3.

[0044] With reference to Figure 2 , Figure 3 and Figure 4 , one end of the piston 10 is provided with a feeding hole 104 which penetrates the feeding part 101, the connecting part 102 and the fixing part 103. The sleeve pipe 13 can be inserted into the feeding hole 104. The feeding part 101 is provided with a limiting ring groove 1011 on the side thereof which is away from the connecting part 102, the limiting ring groove 1011 surrounds the feeding hole 104 and is in communication with the feeding hole 104. The feeding part 101 is provided with a second guide inclined surface 1012 which is arranged at the junction of the inner wall of the feeding hole 104 and the bottom wall of the limiting ring groove 1011.

[0045] With reference to Figure 3 , two mounting ring blocks 11 are arranged, and the inner diameter of the mounting ring blocks 11 is the same as the diameter of the connecting part 102. One mounting ring block 11 is sleeved outside the fixing part 103 and is in contact with the sealing ring block 6, and the other mounting ring block 11 is sleeved outside the connecting part 102 and is in contact with the feeding part 101. The outer circumferential surface of each of the two mounting ring blocks 11 is fixedly connected with a mounting ring pad 111. The mounting ring block 11 and the mounting ring pad 111 are rubber parts or plastic parts with elasticity.

[0046] With reference to Figure 3 , the second spring 12 is sleeved outside the connecting part 102 and the fixing part 103. The second spring 12 is in a compressed state, and the two ends of the second spring 12 are respectively in abutment with one mounting ring block 11. The outer circumferential surface of each of the two mounting ring blocks 11 is in contact with the second spring 12.

[0047] With reference to Figure 2 , Figure 3 and Figure 4, an elastic washer 105 is provided on the end of the piston 10 away from the discharge joint 7, and one end of the elastic washer 105 is inserted into the limiting ring groove 1011. The opening size of the elastic washer 105 gradually increases in the direction away from the discharge joint 7, and the minimum opening area of ​​the elastic washer 105 is smaller than the opening area of ​​the through hole 104 toward one end of the elastic washer 105. The outer circumferential surface of the elastic washer 105 is fixedly connected to the first buffer ring block 106, and the side of the first buffer ring block 106 away from the feed joint 5 is in contact with the piston 10. The outer circumferential surface of the first buffer ring block 106 is provided with a second buffer ring block 107, and the second buffer ring block 107 extends in the direction away from the discharge joint 7. The elastic washer 105, the first buffer ring block 106 and the second buffer ring block 107 are rubber parts or elastic plastic parts.

[0048] Reference Figure 2 and Figure 3 The first guide slope 134 is located on the movement path of the elastic washer 105 toward the feed connector 5. When the sleeve 13 abuts the elastic washer 105, the first guide slope 134 is coplanar with the inner wall of the elastic washer 105, and the buffer ring 136 abuts the second guide slope 1012.

[0049] Reference Figure 5 The outer sleeve 13 is provided with a protective ring block 108, which contacts the outer circumference of the sleeve 13. The outer circumference of the protective ring block 108 is fixedly connected with a fixed ring block 109. The protective ring block 108 and the fixed ring block 109 are rubber parts or elastic plastic parts.

[0050] Reference Figure 2 、 Figure 3 and Figure 4 The first spring 14 is sleeved outside the sleeve 13 and is in a compressed state. One end of the first spring 14 abuts against the first buffer ring 106, and the other end of the first spring 14 abuts against the fixed ring 109. The outer circumferential surface of the protective ring 108 and the outer circumferential surface of the elastic washer 105 both contact the inner side of the first spring 14, and the inner circumferential surface of the second buffer ring 107 contacts the outer side of the first spring 14.

[0051] A coil is provided in the accommodating chamber 2 and is sleeved on the outside of the tube body 3 . The coil is used to drive the piston 10 to perform reciprocating motion.

[0052] The implementation principle of the low-noise electromagnetic pump according to an embodiment of the application is as follows: during the movement of the piston 10 close to the feed joint 5, the first guide inclined surface 134 of the sleeve 13 is inserted into the feed hole 104 after passing through the elastic washer 105 until the sleeve 13 abuts against the elastic washer 105, and at the same time, the buffer ring 136 abuts against the second guide inclined surface 1012, at this time, the piston 10 moves to the lowest point. Conversely, the piston 10 moves away from the feed joint 5, and when the piston 10 abuts against the sealing ring block 6, at this time, the piston 10 moves to the highest point. During the reciprocating movement of the piston 10, the probability of the sleeve 13 and the piston 10 respectively abutting against the first spring 14, the probability of the sleeve 13 and the piston 10 abutting against each other, and the probability of the piston 10 abutting against the second spring 12 are reduced, thereby reducing the noise generated by the movement of the piston 10 and the sleeve 13.

[0053] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms "first", "second", "third", and the like used in the specification and claims of the present application do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "one" or "a" or the like do not denote a quantity limitation, but mean that there is at least one. The terms "include" or "contain" or the like mean that the elements or objects appearing before the "include" or "contain" cover the elements or objects listed after the "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "upper", "lower", "left", "right", and the like are used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.

[0054] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the design concept of the present application shall be included in the protection scope of the present application.

Claims

1. A low-noise electromagnetic pump, comprising a housing (1), a receiving chamber (2) defined in the housing (1), a tube (3) passing through the receiving chamber (2) passing through the housing (1), one end of the tube (3) being connected to a feed connector (5), and the other end of the tube (3) being connected to a discharge connector (7), characterized in that: A piston (10) is provided in the tube body (3) and reciprocates along the axis of the tube body (3); a sleeve (13) is connected to one end of the feed joint (5) facing the discharge joint (7); a through hole (104) for inserting the sleeve (13) is provided at one end of the piston (10) facing the feed joint (5); an elastic washer (105) surrounding the axis of the through hole (104) is provided at one end of the piston (10) facing the feed joint (5); an opening area of ​​the through hole (104) near the elastic washer (105) is larger than that of the elastic washer (105). The minimum opening area is provided, and the end of the elastic gasket (105) facing the feed connector (5) extends to the outside of the piston (10) along the length direction of the piston (10); the end of the sleeve (13) facing the piston (10) is provided with a first guide slope (134), and the first guide slope (134) is provided at the junction of the end of the sleeve (13) away from the feed connector (5) and the outer edge of the sleeve (13). When the piston (10) moves toward the feed connector (5), the first guide slope (134) is located on the moving path of the elastic gasket (105).

2. A low-noise electromagnetic pump according to claim 1, characterized in that: The opening size of the elastic washer (105) gradually increases in a direction approaching the feed connector (5). When the elastic washer (105) contacts the sleeve (13), the inner wall of the elastic washer (105) fits the first guide slope (134).

3. A low-noise electromagnetic pump according to claim 1, characterized in that: A limiting ring groove (1011) for inserting an elastic gasket (105) is provided on a side of the piston (10) facing the feed connector (5).

4. A low-noise electromagnetic pump according to claim 1, characterized in that: A first buffer ring block (106) is provided on the outer circumferential surface of the elastic washer (105), a first spring (14) is provided in the tube body (3), one end of the first spring (14) is in contact with the feed connector (5), and the other end of the first spring (14) is in contact with the first buffer ring block (106), a second buffer ring block (107) is provided on the outer circumferential surface of the first buffer ring block (106), the second buffer ring block (107) extends in a direction close to the feed connector (5), and the first spring (14) is located in the second buffer ring block (107).

5. The low-noise electromagnetic pump according to claim 1, characterized in that: A first fixed ring groove (135) is provided on the first guide inclined surface (134), a buffer ring (136) is provided in the first fixed ring groove (135), and the buffer ring (136) extends outside the first fixed ring groove (135).

6. The low-noise electromagnetic pump according to claim 1, characterized in that: A first rubber block (131) is provided between the feed connector (5) and the sleeve (13) to connect the two. The first rubber block (131) is connected to the outer circumferential surface of the sleeve (13), and the end of the first rubber block (131) away from the piston (10) is connected to the feed connector (5).

7. A low-noise electromagnetic pump according to claim 6, characterized in that: A second fixed annular groove (132) is provided on the outer circumferential surface of the sleeve (13); a second rubber block (133) is provided on one end of the first rubber block (131) facing the sleeve (13); and the second rubber block (133) is provided in the second fixed annular groove (132).

8. The low-noise electromagnetic pump according to claim 5, characterized in that: The outer circumference of the sleeve (13) is sleeved with a protective ring block (108), and the outer circumference of the protective ring block (108) is provided with a fixed ring block (109), and the fixed ring block (109) is located between the first rubber block (131) and the first spring (14).

9. The low-noise electromagnetic pump according to claim 1, characterized in that: The piston (10) comprises a feed portion (101) located near one end of the sleeve (13), a fixed portion (103) arranged in the feed joint (5), and a connecting portion (102) for connecting the feed portion (101) and the fixed portion (103); a sealing ring block (6) sleeved on the outside of the fixed portion (103) is provided between the discharge joint (7) and the tube body (3); a mounting ring block (11) in contact with the sealing ring block (6) is provided on the outer sleeve of the connecting portion (102); a mounting ring block (11) in contact with the fixed portion (103) is provided on the outer sleeve of the fixed portion (103); a mounting ring gasket (111) is provided on the outer circumferential surface of the two mounting ring blocks (11); a second spring (12) is provided between the two mounting ring gaskets (111); and the end surfaces of the two mounting ring gaskets (111) close to each other are in contact with the second spring (12).

Images