Electromagnetic valve with improved waterproof sleeve structure

Abstract

An electromagnetic valve with an improved waterproof sleeve structure comprises a stator assembly, a waterproof sleeve fixed on the stator assembly and a valve cover arranged on the waterproof sleeve in a covering mode, the waterproof sleeve comprises a columnar sleeve part, and a hollow cavity for containing a movable iron core and a spring is formed in the center of the sleeve part. The valve is characterized in that the end face, axially facing one side of the valve cover, of the sleeve part is concave downwards to form a plurality of concave parts which are distributed in the circumferential direction and are communicated with the cavity of the sleeve part. According to the electromagnetic valve with the improved waterproof sleeve structure, the downward concave part communicated with the cavity is formed in the end face of the side, facing the end cover in the axial direction, of the sleeve part, the gap between the top end of the sleeve part and part of the radial direction of the movable iron core is enlarged, and the situation that bacteria breed at the top end of the sleeve part and adhere to the movable iron core is reduced; and when water is supplied for the first time after the electromagnetic valve leaves a factory or the electromagnetic valve is started in a standby mode for a long time, water can quickly enter the electromagnetic valve from the downward concave part and flush away bacteria bonded between the sleeve part and the movable iron core, the electromagnetic valve is quick in starting response, and the working stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electromagnetic valve with improved water-proof sleeve structure, which belongs to the IPC classification F16K 31 / 06 (2006.01). BACKGROUND

[0002] The structure of the existing electromagnetic valve is shown in the prior art patent CN114110238B, entitled "Stator assembly of water inlet electromagnetic valve and water inlet electromagnetic valve", which comprises a water-proof sleeve and a movable iron core installed on the water-proof sleeve. After the electromagnetic valve is assembled, it needs to be tested for water to ensure that the sealing and flow characteristics of the electromagnetic valve meet the customer's requirements. Although the residual water inside the electromagnetic valve is cleaned after the water test, it is difficult to completely remove the water due to the compact cooperation of the internal structural parts of the electromagnetic valve. The residual water in the water-proof sleeve for a long time is easy to breed bacteria, causing the movable iron core to adhere to the water-proof sleeve, resulting in the situation that the electromagnetic valve cannot be started or the response is slow after the initial power-on after leaving the factory.

[0003] The utility model aims at solving the above technical defects, and realizes noise reduction and improves assembly reliability through structure optimization. For related terms and common knowledge, please refer to "Mechanical Engineering Handbook", "Electrical Engineering Handbook", and national standards GB14536.9 "Special requirements (including mechanical requirements) for electric automatic controllers for household and similar purposes", GB / T21465-2008 "Valve terminology", and national light industry standard QB / T1291 "Water inlet electromagnetic valve for automatic washing machine". UTILITY MODEL CONTENTS

[0004] To solve the above problems, the utility model provides the following technical solutions:

[0005] An electromagnetic valve with improved water-proof sleeve structure, comprising a stator assembly, a water-proof sleeve fixed to the stator assembly, and a valve cover covering the water-proof sleeve, the water-proof sleeve comprising a cylindrical sleeve portion, the center of the sleeve portion forming a hollow cavity accommodating a movable iron core and a spring, characterized in that: the end face of the sleeve portion axially towards the valve cover side is concave to form a plurality of concave portions distributed along the circumference and communicating with the hollow cavity.

[0006] The electromagnetic valve with improved water-proof sleeve structure of the utility model has the concave portions communicating with the hollow cavity on the end face of the sleeve portion axially towards the end cover side, which increases the gap between the top end of the sleeve portion and the movable iron core in the radial direction, reduces the adhesion of the movable iron core caused by the bacteria breeding at the top end of the sleeve portion, and when the electromagnetic valve is initially powered on or started after a long standby, water can quickly enter the concave portions and flush away the bacteria adhering between the sleeve portion and the movable iron core. The electromagnetic valve with the above design has fast start-up response and improved working stability.

[0007] Further, the axial projection profiles of the lower recesses are identical and are uniformly arranged in the circumferential direction.

[0008] Further, the axial projection profiles of the lower recesses are identical and are uniformly arranged in the circumferential direction.

[0009] Further, the axial projection profiles of the lower recesses are identical and are uniformly arranged in the circumferential direction.

[0010] Further, the axial projection profiles of the lower recesses are identical and are uniformly arranged in the circumferential direction.

[0011] Further, the axial projection profiles of the lower recesses are identical and are uniformly arranged in the circumferential direction.

[0012] Further, the axial projection profiles of the lower recesses are identical and are uniformly arranged in the circumferential direction. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic diagram of the electromagnetic valve with the improved water-proof sleeve structure of the utility model;

[0014] Figure 2 is an axial sectional view of the electromagnetic valve of the utility model;

[0015] Figure 3 is an axial sectional view of the first embodiment of the water-proof sleeve of the utility model;

[0016] Figure 4 is a schematic diagram of the enlarged structure of part A of the utility model; Figure 3

[0017] Figure 5 is a top view of the water-proof sleeve of the utility model;

[0018] Figure 6 is a schematic diagram of the enlarged structure of part B of the utility model; Figure 5

[0019] is a schematic diagram of the enlarged structure of part C of the utility model; Figure 7

[0020] is a schematic diagram of the second embodiment of the water-proof sleeve of the utility model; Figure 8 Figure 7

[0021] ​​​10 - working chamber, 11 - hollow cavity, 21 - side surface, 22 - first sunken surface, 100 - stator assembly, 200 - water-proof sleeve, 210 - sleeve portion, 211 - lower recessed portion, 212 - flat surface portion, 213 - transition surface portion, 214 - sunken groove, 215 - convex rib, 216 - lower recessed ring, 220 - flange portion, 300 - valve cover, 400 - opening and closing assembly, 500 - movable iron core, 600 - spring DETAILED DESCRIPTION

[0022] The utility model discloses an electromagnetic valve with improved water-proof sleeve structure, see Figures 1 to 4 The electromagnetic valve comprises a stator assembly 100, a water-proof sleeve 200 fixed on the stator assembly 100, a valve cover 300 covered on the water-proof sleeve 200, an opening and closing assembly 400 arranged in a working chamber 10 surrounded by the water-proof sleeve 200 and the valve cover 300, a movable iron core 500 and a spring 600 installed on the water-proof sleeve 200. The improvement of the utility model is to optimize the structure of the water-proof sleeve 200. The stator assembly (including a coil holder, an enameled wire wound on the coil holder, a magnetic yoke and a water-proof sleeve, etc.) and the opening and closing assembly (including a valve plug and a valve plug rubber, etc.) are the same as the existing structure, which will not be repeated here.

[0023] Embodiment I:

[0024] See Figures 2 to 6 The water-proof sleeve 200 of the utility model comprises a sleeve portion 210 in the shape of a column. The center of the sleeve portion 210 forms a hollow cavity 11 for accommodating the movable iron core 500 and the spring 600. The end surface K1 of the sleeve portion 210 axially facing the valve cover 300 is recessed to form a plurality of lower recessed portions 211 distributed in the circumferential direction. The lower recessed portions 211 are in communication with the hollow cavity 11 of the sleeve portion 210. Through the above-mentioned electromagnetic valve, the space between the top end of the sleeve portion 210 and the movable iron core 500 in the radial direction is increased, which can avoid the bacteria growing at the top end of the sleeve portion 210 from adhering to the movable iron core 500. When the electromagnetic valve is first used or started after a long standby, water can quickly enter the lower recessed portions 211 and wash away the bacteria adhering between the sleeve portion and the movable iron core. The above-mentioned electromagnetic valve has fast starting response and improved working stability.

[0025] Preferably, see Figures 3 to 6, the axial projection profile of the lower recess 21 of the water-proof sleeve 210 is the same, and is uniformly arranged in the circumferential direction. Through the design, the movable iron core can be uniformly stressed during operation, and the swing of the movable iron core during operation is reduced. In order to make the water entering from the water inlet end of the valve body flow more smoothly between the sleeve part and the radial gap of the movable iron core, and further reduce the swing of the movable iron core during operation, the axial projection of the lower recess 211 is in a tooth shape, specifically, the lower recess 211 includes side surfaces 21 on both circumferential sides and a connecting surface (not shown) connecting the two side surfaces, and the side surface 21 includes a planar portion 212 in a planar shape, and the planar portions 212 of adjacent lower recesses 211 are connected by arc-shaped transition surface portions 213 close to one end of the hollow cavity 11 in the radial direction.

[0026] See Figure 3 The inner wall surface of the hollow cavity 11 of the sleeve part 210 of the water-proof sleeve 200 is radially protruded by a plurality of protruding ribs 215. Through the design, the generation of bacteria between the sleeve part and the radial gap of the movable iron core is reduced, the resistance during the start of the electromagnetic valve is reduced, and the working stability of the electromagnetic valve is improved.

[0027] See Figure 3 and Figure 4 As a preferred embodiment, the bottom surface K2 of the lower recess 211 of the water-proof sleeve 210 is continuously recessed to form a sunken groove 214. Through the design, residual water can be accumulated in the sunken groove, the generation of bacteria between the sleeve part and the radial gap of the movable iron core is reduced, and the resistance during the start of the electromagnetic valve is reduced. In order to make the residual water easily flow into the sunken groove 214 and further reduce the resistance during the start of the electromagnetic valve, the sunken groove 214 in the embodiment is radially close to the side surface of the hollow cavity 11, and the top end of the first sunken surface 22 is inclined to the axis L of the water-proof sleeve.

[0028] Embodiment two:

[0029] See Figure 7 and Figure 8 The water-proof sleeve 200 of the embodiment also includes a sleeve part 210 in a columnar shape and a plurality of lower recesses 211 formed in the end surface K1 of the sleeve part 210 axially towards the valve cover (not shown) by being recessed. Different from the above-mentioned embodiment, the end surface K1 of the sleeve part 210 axially towards the valve cover is recessed to form a ring-shaped lower recess ring 216 with a depth greater than that of the lower recess 211 on the radial outer side of the lower recess 211. Through the design of the electromagnetic valve shell, the water inlet area and the water storage volume for storing residual water are increased, the generation of bacteria between the sleeve part and the radial gap of the movable iron core is further reduced, the resistance during the start of the electromagnetic valve is reduced, and the working stability of the electromagnetic valve is improved.

[0030] The utility model is not limited to the above embodiment, if the various modifications or deformation of the utility model do not deviate from the spirit and scope of the utility model, if these modifications and deformation belong to the right claim and equivalent technical scope of the utility model, then the utility model also intends to contain these modifications and deformation.

Claims

1. An electromagnetic valve having an improved water-proof sleeve structure, comprising a stator assembly (100), a water-proof sleeve (200) fixed to the stator assembly (100), and a valve cover (300) provided on the water-proof sleeve (200), the water-proof sleeve (200) comprising a cylindrical sleeve portion (210) having a hollow cavity (11) formed in the center thereof to accommodate a movable core (500) and a spring (600), characterized in that: The end face of the sleeve part (210) on the side of the valve cover (300) is concave to form a plurality of concave parts (211) which are distributed in the circumferential direction and communicate with the hollow cavity (11).

2. The improved electromagnetic valve of the water-resistant sleeve structure according to claim 1, characterized in that: The axial projection profiles of the concave parts (211) are identical and are uniformly arranged in the circumferential direction.

3. The improved electromagnetic valve of the water-resistant sleeve structure according to claim 2, characterized in that: The axial projection of the concave part (211) is in the shape of a tooth, and the side face (21) includes a flat part (212), and the flat parts (212) of adjacent concave parts (211) are connected by arc-shaped transition part (213) on the side close to the end of the hollow cavity (11) in the radial direction.

4. The improved electromagnetic valve of a water-cushion structure according to claim 1 or 2, characterized by: The radial bottom face of the concave part (211) is further concave to form a sunken groove (214).

5. The improved electromagnetic valve of the water-resistant jacket structure according to claim 4, characterized by: The side face of the sunken groove (214) on the side close to the hollow cavity (11) in the radial direction forms a first sunken face (22) which is inclined to the axis L of the water jacket.

6. The improved electromagnetic valve of the water-resistant jacket structure according to claim 1, characterized by: The end face of the concave part (211) on the side of the valve cover (300) is further concave to form an annular concave ring (216) with a depth greater than that of the concave part (211), and the concave ring (216) is located on the radial outer side of the concave part (211).

7. The improved electromagnetic valve of the water-resistant jacket structure according to claim 1, characterized by: The inner wall face of the hollow cavity (11) is convex to the inside in the radial direction to form a plurality of convex ribs (215) which are distributed in the circumferential direction.

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