Electromagnetic valve with noise reduction function

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve with a noise reduction function, which comprises a magnetic shield, a static iron core, a movable iron core, a plug, a reset spring and a magnetizer. The static iron core and the plug are fixed to the two ends of the magnetic isolation sleeve, the movable iron core is arranged between the static iron core and the plug, the reset spring is arranged between the static iron core and the movable iron core, and the magnetizer provides driving force for the movable iron core to move towards the static iron core. Wherein an elastic cushion is arranged between the movable iron core and the plug, a cylindrical groove is formed in the movable iron core, a buffer spring is arranged in the cylindrical groove, and the end, extending out of the cylindrical groove, of the buffer spring abuts against the elastic cushion. By means of a double buffering mechanism of the elastic cushion and the buffering spring, the movable iron core does not directly impact the plug in the resetting process, the movable iron core gradually decelerates and stops through buffering, the impact force of the movable iron core on the plug is effectively reduced, noise is remarkably reduced, the noise reduction effect of the electromagnetic valve is improved, and the riding comfort level is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, and in particular to an electromagnetic valve with noise reduction function. Background Technology

[0002] Solenoid valves are electromagnetically controlled industrial devices and are basic automated components used to control fluids. They belong to the actuator category, and their main principle is to open and close by combining electromagnetic force and elastic force.

[0003] As people's living standards improve, their demands for vehicle comfort are also increasing. The noise standards of traditional air conditioning thermal management systems can no longer meet user needs. In particular, noise reduction of air conditioning solenoid valves has faced unprecedented challenges in recent years.

[0004] In existing solenoid valves, when the solenoid coil is de-energized, the moving iron core loses the magnetic attraction of the stationary iron core, and the return spring pushes the moving iron core back to its original position. However, due to the spring force, the moving iron core may move rapidly and collide with the plug, generating significant noise and severely affecting passenger comfort. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a solenoid valve with noise reduction function, which effectively solves the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a solenoid valve with noise reduction function, comprising: a magnetic shielding sleeve, a stationary iron core, a moving iron core, a plug, a return spring, and a magnetic conductor;

[0007] The stationary iron core and the plug are fixed at both ends of the magnetic shielding sleeve. The moving iron core is disposed between the stationary iron core and the plug. The reset spring is disposed between the stationary iron core and the moving iron core. The magnetic conductor provides driving force for the movement of the moving iron core toward the stationary iron core.

[0008] An elastic pad is provided between the moving iron core and the plug. A cylindrical groove is provided inside the moving iron core. A buffer spring is provided inside the cylindrical groove. One end of the buffer spring extending out of the cylindrical groove abuts against the elastic pad.

[0009] Furthermore, the diameter of the elastic pad is larger than the diameter of the cylindrical groove.

[0010] Furthermore, the elastic pad extends towards the center of the end face of the moving iron core to form a guide post;

[0011] The guide post is embedded in the cylindrical groove, and the buffer spring is sleeved on the guide post.

[0012] Furthermore, the length of the guide post is less than the depth of the cylindrical groove.

[0013] Furthermore, the edge of the end face of the elastic pad that contacts the plug is provided with an arc surface.

[0014] Furthermore, the moving iron core and the stationary iron core are provided with matching conical heads and conical grooves at their opposite ends.

[0015] Furthermore, the stationary iron core is provided with a groove to accommodate the return spring;

[0016] One end of the reset spring is fixed in the groove, and the other end abuts against the moving iron core.

[0017] Furthermore, a mounting hole is provided on the central axis of the moving iron core, and a valve needle and a first spring are provided in the mounting hole;

[0018] One end of the first spring is fixedly installed, and the other end abuts against the valve needle, which passes through the stationary iron core and connects to the piston head.

[0019] Furthermore, the buffer spring is either a cylindrical helical compression spring or a disc spring.

[0020] Furthermore, the elastic pad is made of rubber, silicone, or polyurethane.

[0021] The beneficial effects of this utility model are as follows: Through the dual buffering mechanism of elastic pad and buffer spring, the moving iron core will not directly hit the plug during the reset process. Instead, it will gradually decelerate and stop through buffering, which effectively reduces the impact force of the moving iron core on the plug, significantly reduces noise, improves the noise reduction effect of the solenoid valve, and ensures the comfort of the ride. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of the solenoid valve with noise reduction function in an embodiment of this utility model;

[0024] Figure 2 This is an exploded view of the elastic pad and buffer spring in an embodiment of this utility model;

[0025] Figure 3This is a schematic diagram of the elastic pad and buffer spring when the valve port is closed in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the elastic pad and buffer spring when the valve port is opened in an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of another structure of the elastic pad in an embodiment of this utility model.

[0028] Reference numerals in the attached diagram: 1. Magnetic shielding sleeve; 2. Stationary iron core; 3. Moving iron core; 31. Groove; 32. Mounting hole; 4. Plug; 5. Return spring; 6. Magnetic conductor; 7. Elastic pad; 71. Guide post; 72. Arc surface; 8. Buffer spring; 9. Valve needle; 10. First spring. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] like Figures 1 to 5 The solenoid valve with noise reduction function shown includes: a magnetic shielding sleeve 1, a stationary iron core 2, a moving iron core 3, a plug 4, a return spring 5, and a magnetic conductor 6; the stationary iron core 2 and the plug 4 are fixed at both ends of the magnetic shielding sleeve 1, the moving iron core 3 is disposed between the stationary iron core 2 and the plug 4, the return spring 5 is disposed between the stationary iron core 2 and the moving iron core 3, and the magnetic conductor 6 provides driving force for the movement of the moving iron core 3 toward the stationary iron core 2;

[0033] Among them, an elastic pad 7 is provided between the moving iron core 3 and the plug 4, a cylindrical groove 31 is provided inside the moving iron core 3, a buffer spring 8 is provided inside the cylindrical groove 31, and one end of the buffer spring 8 extending out of the cylindrical groove 31 abuts against the elastic pad 7.

[0034] In this invention, the reaction force of the buffer spring 8 is less than the elastic force of the return spring 5. When the moving iron core 3 loses its magnetic attraction, the return spring 5 pushes the moving iron core 3 away from the stationary iron core 2. At this time, the buffer spring 8 can absorb the kinetic energy of the moving iron core 3 and reduce its impact speed. When the moving iron core 3 contacts the elastic pad 7, the elasticity of the rubber can further absorb some of the impact energy, reducing the rigid collision between the moving iron core 3 and the plug 4. Through the dual buffering mechanism of the elastic pad 7 and the buffer spring 8, the moving iron core 3 will not directly hit the plug 4 during the reset process, but will gradually decelerate and stop through buffering, effectively reducing the impact force of the moving iron core 3 on the plug 4, significantly reducing noise, improving the noise reduction effect of the solenoid valve, and ensuring the comfort of the ride.

[0035] In this design, the diameter of the elastic pad 7 is larger than the diameter of the cylindrical groove 31. After the buffer spring 8 is compressed, the moving iron core 3 can abut against the elastic pad 7, avoiding direct contact with the plug 4. In addition, the larger diameter of the elastic pad 7 can provide a larger contact area, allowing the impact energy of the moving iron core 3 to be more evenly distributed on the elastic pad 7, effectively protecting the plug 4 and the moving iron core 3, and extending the service life of the solenoid valve.

[0036] In a preferred embodiment of this invention, the elastic pad 7 extends towards the center of the end face of the moving iron core 3 to form a guide post 71; the guide post 71 is embedded in the cylindrical groove 31, and the buffer spring 8 is sleeved on the guide post 71. The design of the guide post 71 makes the installation of the buffer spring 8 more stable, avoiding the spring from shifting or twisting during compression and extension, thereby improving the reliability and stability of the entire buffer system.

[0037] As a preferred embodiment of the above, the length of the guide post 71 is less than the depth of the cylindrical groove 31. After the moving iron core 3 contacts the elastic pad 7, the guide post 71 will not contact the bottom of the groove 31, so that the buffer spring 8 maintains a certain compression stroke, thereby more effectively absorbing the kinetic energy of the moving iron core 3, further reducing the impact speed, and avoiding additional impact force and noise caused by the hard contact between the guide post 71 and the bottom of the groove 31.

[0038] In this invention, the edge of the end face of the elastic pad 7 that contacts the plug 4 is provided with an arc surface 72. When the moving iron core 3 moves and contacts the elastic pad 7, the arc surface 72 can provide a smoother contact transition and reduce the impact force caused by sudden contact.

[0039] In a preferred embodiment of this invention, the moving iron core 3 and the stationary iron core 2 are provided with matching conical heads and conical grooves at their opposite ends. The matching of the conical heads and conical grooves provides more stable contact and reduces friction and wear between the moving iron core 3 and the stationary iron core 2.

[0040] Based on the above embodiment, the stationary iron core 2 is provided with a groove to accommodate the reset spring 5; one end of the reset spring 5 is fixed in the groove and the other end abuts against the moving iron core 3, which can ensure that the reset spring 5 can quickly and accurately reset after the electromagnetic force disappears, and avoid the unstable movement of the moving iron core 3 due to the shaking or displacement of the reset spring 5.

[0041] In the preferred embodiment, a mounting hole 32 is provided on the central axis of the moving iron core 3, and a valve needle 9 and a first spring 10 are disposed within the mounting hole 32. One end of the first spring 10 is fixedly disposed, and the other end abuts against the valve needle 9. The valve needle 9 passes through the stationary iron core 2 and connects to the piston head. When the valve port is closed, the valve needle 9 can be finely adjusted by the elastic extension and contraction of the first spring 10, thereby better fitting the valve seat, ensuring sealing, and effectively reducing leakage problems caused by the small gap between the valve needle 9 and the valve seat. When the solenoid valve is closed, the valve needle 9 gradually contacts the valve seat under the buffering action of the spring, rather than directly impacting it. This buffering mechanism can significantly reduce the impact force, reduce the wear of the valve needle 9 and the valve seat, and extend the service life of the solenoid valve.

[0042] In this invention, the buffer spring 8 is either a cylindrical helical compression spring or a disc spring. This effectively reduces the impact and noise generated during the operation of the solenoid valve. The elastic pad 7 is made of rubber, silicone, or polyurethane. These materials have good elasticity, wear resistance, and shock absorption properties. Installed between the moving iron core 3 and the plug 4, it absorbs the kinetic energy of the moving iron core 3, reduces impact and noise, and thus improves the smoothness of the solenoid valve's operation and its service life.

[0043] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A solenoid valve with noise reduction function, characterized in that, The utility model relates to a magnetic valve, comprising: a magnetic isolation sleeve (1), a static iron core (2), a dynamic iron core (3), a plug (4), a reset spring (5) and a magnetic conductor (6); the static iron core (2) and the plug (4) are fixed at both ends of the magnetic isolation sleeve (1), the dynamic iron core (3) is arranged between the static iron core (2) and the plug (4), the reset spring (5) is arranged between the static iron core (2) and the dynamic iron core (3), and the magnetic conductor (6) provides driving force for the movement of the dynamic iron core (3) towards the static iron core (2); wherein, an elastic pad (7) is arranged between the dynamic iron core (3) and the plug (4), a cylindrical recess (31) is arranged in the dynamic iron core (3), a buffer spring (8) is arranged in the cylindrical recess (31), and one end of the buffer spring (8) extending out of the cylindrical recess (31) abuts against the elastic pad (7).

2. The electromagnetic valve having a noise reduction function according to claim 1, characterized by, The diameter of the elastic pad (7) is greater than the diameter of the cylindrical recess (31).

3. The electromagnetic valve having a noise reduction function according to claim 1, characterized by, An end surface of the elastic pad (7) facing the dynamic iron core (3) extends to form a guide column (71); the guide column (71) is embedded in the cylindrical recess (31), and the buffer spring (8) is sleeved on the guide column (71).

4. The electromagnetic valve having a noise reduction function according to claim 3, characterized by, The length of the guide column (71) is less than the depth of the cylindrical recess (31).

5. The electromagnetic valve having a noise reduction function according to claim 1, characterized by, An edge of an end surface of the elastic pad (7) in contact with the plug (4) is provided with a circular arc surface (72).

6. The electromagnetic valve having a noise reduction function according to claim 1, characterized by, The dynamic iron core (3) and the static iron core (2) are provided with a matching conical head and a conical groove at opposite ends.

7. The electromagnetic valve having a noise reduction function according to claim 6, characterized by The static iron core (2) is provided with a containing groove accommodating the reset spring (5); one end of the reset spring (5) is fixed in the containing groove, and the other end abuts against the dynamic iron core (3).

8. The electromagnetic valve having a noise reduction function according to claim 1, characterized by, A mounting hole (32) is arranged on the central axis of the dynamic iron core (3), and a valve needle (9) and a first spring (10) are arranged in the mounting hole (32); one end of the first spring (10) is fixedly arranged, and the other end abuts against the valve needle (9), and the valve needle (9) is connected with a piston head through the static iron core (2).

9. The electromagnetic valve having a noise reduction function according to claim 1, characterized by, The buffer spring (8) is one of a cylindrical helical compression spring or a butterfly spring.

10. The electromagnetic valve having a noise reduction function according to claim 1, characterized by, The elastic pad (7) is made of rubber, silicone or polyurethane.

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