Electromagnetic valve with improved flow limiting assembly

Abstract

An electromagnetic valve with an improved flow limiting assembly comprises a valve body, a coil assembly, an opening and closing assembly and the flow limiting assembly, the flow limiting assembly comprises a flow limiting valve seat and an elastic piece with a mounting through hole, the flow limiting valve seat comprises a base part, a surrounding edge part and a limiting column, and the limiting column is hollow to form a through hole penetrating through the base part; the limiting column is sleeved with the elastic piece through the mounting through hole, a water passing hole is formed in the area, located on the outer side of the limiting column, of the base part, a plurality of flow limiting columns are arranged on the side, axially facing the elastic piece, of the base part in a protruding mode in the circumferential direction, and a plurality of bosses are arranged on the other side, axially deviating from the elastic piece, of the base part in a protruding mode in the circumferential direction. The flow limiting column is located on the radial outer side of the profile of the projection of the water passing hole, and the boss is located on the radial inner side of the profile of the projection of the water passing hole. By means of the improved electromagnetic valve, bubbles of liquid penetrating through the base part can be punctured, the situation that the bubbles intersect at the downstream of the base part and collide is reduced, and the good noise reduction effect is achieved.

Description

Technical Field

[0001] The utility model relates to a water inlet solenoid valve for improving a current limiting component, and belongs to F16K 7 / 17 in the IPC classification. Background Art

[0002] For the existing solenoid valve with a current limiting component, as shown in the prior patent application No. CN218480217U and the patent name "A water inlet solenoid valve with a current limiting component", it includes a valve body, a coil assembly, a closing member and a current limiting component arranged on the valve body. When the valve works, liquid enters from the water inlet of the valve body and passes through the current limiting component. After the liquid passes through the holes or gaps of the current limiting component, the liquid converges and collides with each other to generate noise. Especially when the water inlet pressure is above 6 bar, the generated impact noise is very obvious. Therefore, there is a need for improvement. Content of the Utility Model

[0003] To solve the above problems, the utility model provides the following technical solutions:

[0004] A solenoid valve with an improved current limiting component includes a valve body, a coil assembly, a closing assembly and a current limiting component arranged in the water inlet of the valve body. The current limiting component includes a current limiting valve seat and an elastic member with an installation through hole. The current limiting valve seat includes a base portion, a circumferentially protruding annular edge portion on the outer edge of the base portion, and an axially protruding columnar limiting column in the center of the base portion. The limiting column is hollow to form a through hole penetrating the base portion. The elastic member is sleeved on the limiting column through the installation through hole. The area of the base portion located outside the limiting column is provided with water passing holes. Its characteristics are that: several current limiting columns are circumferentially and convexly arranged on the axially elastic member side of the base portion, and several convex platforms are circumferentially and convexly arranged on the axially opposite side of the elastic member. And in the axial projection of the current limiting valve seat, the current limiting columns are located radially outside the contour of the projection of the water passing holes, and the convex platforms are located radially inside the contour of the projection of the water passing holes.

[0005] For the solenoid valve with an improved current limiting component of the utility model, by providing convex platforms on the axial end face of the base portion facing away from the elastic member, this design can puncture the bubbles of the liquid after passing through the base portion, reduce the impact of the bubbles converging and colliding downstream of the base portion, and achieve a good noise reduction effect.

[0006] Further, the convex platforms are tooth-shaped and are evenly distributed circumferentially.

[0007] Furthermore, the through hole is provided as several small water passing holes at the bottom of the base portion.

[0008] Furthermore, the gap between adjacent convex platforms is smaller than the opening width of the small water passing holes.

[0009] Further, the water passing small holes include first water passing small holes uniformly distributed in the circumferential direction and second water passing small holes located in the space surrounded by the first water passing small holes and passing through the axis of the flow limiting valve seat.

[0010] Further, in the axial projection of the base portion, the size of the circumferential profile of the convex platform profile is smaller than the size of its radial profile.

[0011] Further, the axial heights of the flow limiting columns are not equal. Description of the Drawings

[0012] Figure 1 is an axial sectional view of the solenoid valve with an improved flow limiting component of the present utility model;

[0013] Figure 2 is an exploded structural schematic diagram of the flow limiting component of the present utility model;

[0014] Figure 3 is an axial sectional view of the flow limiting valve seat of the present utility model;

[0015] Figure 4 is a front view of the flow limiting valve seat of the present utility model;

[0016] Figure 5 is Figure 4 a partial enlarged structural schematic diagram of A in

[0017] Figure 6 is a three-dimensional structural schematic diagram of the flow limiting valve seat of the present utility model;

[0018] Wherein: 41 - first water passing small hole, 42 - second water passing small hole, 100 - valve body, 110 - water inlet, 200 - coil assembly, 300 - opening and closing assembly, 400 - flow limiting assembly, 410 - flow limiting valve seat, 411 - base portion, 412 - surrounding edge portion, 413 - limiting column, 414 - through hole, 415 - water passing hole, 416 - flow limiting column, 417 - convex platform, 418 - convex block, 419 - water passing hole, 420 - elastic member, 421 - installation through hole, 500 - filter Detailed Embodiments

[0019] The present utility model discloses a solenoid valve with an improved flow limiting component, as shown in Figure 1 and Figure 2 , the solenoid valve includes a valve body 100, a coil assembly 200, an opening and closing assembly 300, and a flow limiting assembly 400 arranged in the water inlet 110 of the valve body. Except for the flow limiting assembly 400, the structures and assembly relationships of the other parts of the solenoid valve of the present utility model are the same as those of the water inlet solenoid valve with a flow limiting component disclosed in the prior patent application with the publication number CN218480217U and the patent name of a water inlet solenoid valve with a flow limiting component, and will not be described herein again.

[0020] SeeFigure 2 and Figure 3 , the current-limiting component 400 of the present utility model includes a current-limiting valve seat 410 and an elastic member 420. Among them, the current-limiting valve seat 410 includes a base portion 411, a peripheral edge portion 412 that protrudes in a ring shape from the outer edge of the base portion 411, and a columnar limiting column 413 that protrudes axially from the center of the base portion 411. The limiting column 413 is hollow to form a through hole 414 that penetrates the base portion 411. A water passing hole 415 is provided in the area of the base portion 411 outside the limiting column 413; the elastic member 420 is a columnar body provided with an installation through hole 421; during assembly, the elastic member 420 is sleeved and installed on the limiting column 413 through the installation through hole 421. Usually, the water inlet end of the solenoid valve is connected to tap water. When the solenoid valve works, liquid (i.e., tap water) enters from the water inlet 110 of the valve body 100, then passes through the current-limiting component 400 and enters the water inlet cavity 10 surrounded by the valve body 100 and the stator assembly 200. Also, because there are many bubbles in tap water, in order to reduce the impact caused by the intersection of the water with bubbles after passing through the current-limiting component 400 downstream of the base portion 410, see Figures 1 to Figure 4 , on the end face of the base portion 411 of the present utility model that protrudes axially towards the elastic member 420 side, several columnar current-limiting columns 416 are protruded along the circumferential direction, and on the end face of the base portion 411 that protrudes axially away from the elastic member 420 side, several bosses 417 are protruded along the circumferential direction. And in the axial projection of the current-limiting valve seat 410, the current-limiting columns 416 are located radially outside the contour of the projection of the water passing hole 415, and the bosses 417 are located radially inside the contour of the projection of the water passing hole 415.

[0021] For the solenoid valve with an improved current-limiting component of the present utility model, by providing a boss on the axial end face of the base portion of the current-limiting seat that faces away from the elastic member, and arranging the boss and the current-limiting columns on the radial two sides of the contour of the projection of the water passing hole respectively. Such a design can puncture the bubbles in the liquid after passing through the base portion, reduce the impact caused by the intersection of the bubbles downstream of the base portion, and achieve a good noise reduction effect.

[0022] Preferably, see Figure 2 , the boss 417 of the present utility model is tooth-shaped and is evenly distributed along the circumferential direction. This design can more effectively puncture the bubbles in the liquid after passing through the base portion, reduce the impact caused by the intersection of the bubbles downstream of the base portion, and improve the working stability of the solenoid valve. Of course, as other embodiments, the boss can also be designed as a frustum of a pyramid shape. Further, in order to make the liquid passing through the water passing hole converge more smoothly towards the axis and further improve the working stability of the solenoid valve, see Figure 5 , in the axial projection of the base portion, the circumferential dimension L3 of the contour of the boss 417 is smaller than its radial dimension L4.

[0023] Further, see Figure 2 and Figure 4, the through holes 414 of the current-limiting valve seat 410 of the present utility model are provided with several water-passing small holes 419 at the bottom of the base portion 411. Through the above design, the electromagnetic valve can balance the flow rate through the through holes and the flow rate through the water-passing holes when the water pressure of the incoming water is low, which is beneficial to improving the working stability of the electromagnetic valve. As a preferred embodiment, a plate-shaped convex block 418 protrudes from the radial surface of the through hole 414 of the current-limiting valve seat 410, and the water-passing small holes 419 are provided on the convex block 418. Further, see Figure 5 , the gap size between adjacent bosses 417 of the present utility model is L1, and the opening width size of the water-passing small hole 419 is L2, and it satisfies that L1 is less than L2. Through the above design, the liquid passing through the water-passing holes can cross the tooth tips and converge towards the axis, which is convenient for piercing the bubbles of the liquid after passing through the water-passing holes, and further improves the working stability of the electromagnetic valve.

[0024] Further, see Figure 4 , in order to allow the liquid to pass through the water-passing small holes more smoothly, the water-passing small holes 419 of the present utility model include first water-passing small holes 41 evenly distributed along the circumferential direction and second water-passing small holes 42 located within the space surrounded by the first water-passing small holes 41 and passing through the axis of the current-limiting valve seat.

[0025] Preferably, see Figure 6 , in order to perform current-limiting regulation to meet different incoming water pressures and further improve the applicability of the electromagnetic valve, the axial heights of the current-limiting columns 416 of the present utility model are not equal.

[0026] The present utility model is not limited to the above embodiments. If various modifications or deformations of the present utility model do not depart from the spirit and scope of the present utility model, and if these modifications and deformations fall within the scope of the claims of the present utility model and equivalent technical scope, then the present utility model also intends to include these modifications and deformations.

Claims

1. A solenoid valve with an improved flow-limiting assembly, comprising a valve body (100), a coil assembly (200), an opening and closing assembly (300), and a flow-limiting assembly (400) arranged in a water inlet of the valve body, wherein the flow-limiting assembly (400) comprises a flow-limiting valve seat (410) and an elastic member (420) with a mounting through hole (421), wherein the flow-limiting valve seat (410) comprises a base portion (411), a protruding annular column on the outer edge of the base portion (411), and a plurality of protruding annular columns on the outer edge of the base portion (411). The invention relates to a base part (411) having a cylindrical surrounding edge portion (412) and a columnar limiting column (413) protruding axially from the center of the base part, wherein the limiting column (413) is hollow to form a through hole (414) penetrating the base part (411), the elastic member (420) is sleeved on the limiting column (413) through the mounting through hole (421), and a water hole (415) is provided in the area of ​​the base part (411) located outside the limiting column (413), characterized in that: The base portion (411) is provided with a plurality of flow-limiting columns (416) distributed along the circumferential direction on one side axially facing the elastic member (420), and a plurality of bosses (417) are provided with a plurality of bosses distributed along the circumferential direction on the other side axially away from the elastic member (420), and in the axial projection of the flow-limiting valve seat (410), the flow-limiting columns (416) are located radially outside the outline of the projection of the water passage hole (415), and the bosses (417) are located radially inside the outline of the projection of the water passage hole (415).

2. The solenoid valve with an improved flow limiting assembly according to claim 1, characterized in that: The bosses (417) are tooth-shaped and evenly distributed along the circumferential direction.

3. The solenoid valve with an improved flow limiting assembly according to claim 2, characterized in that: The through hole (414) is arranged at the bottom of the base portion (411) to form a plurality of small water holes (419).

4. The solenoid valve with an improved flow limiting assembly according to claim 3, characterized in that: The gap L1 between the adjacent bosses (417) is smaller than the opening width L2 of the water-passing hole (419).

5. The solenoid valve with an improved flow limiting assembly according to claim 3, characterized in that: The water-passing holes (419) include first water-passing holes (41) uniformly distributed along the circumferential direction and second water-passing holes (42) located in the space surrounded by the first water-passing holes (41) and passing through the axis of the flow-limiting valve seat.

6. The solenoid valve with an improved flow limiting assembly according to claim 2, characterized in that: In the axial projection of the base portion, the dimension L3 of the circumferential contour of the boss (417) is smaller than the dimension L4 of the radial contour thereof.

7. The solenoid valve with an improved flow limiting assembly according to claim 1, characterized in that: The axial heights of the flow-limiting columns (416) are different.

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