CN111928007B

CN111928007B - Integrated water inlet electromagnetic valve and implementation method

Info

Publication number: CN111928007B
Application number: CN201910395288.XA
Authority: CN
Inventors: 王红标; 敖林; 徐飞
Original assignee: Jiangmen Tiandi Electrical Appliance Co ltd
Current assignee: Jiangmen Hanyu Electrical Co ltd
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2022-05-06
Anticipated expiration: 2039-05-13
Also published as: CN111928007A

Abstract

The invention discloses an integrated water inlet electromagnetic valve and an implementation method thereof, wherein the method comprises the following steps: the upper end part of a magnetic yoke, the lower end part of the magnetic yoke, an upper magnetic conduction inner sleeve and a lower magnetic conduction inner sleeve are arranged in a middle hole of the coil assembly to form a stator assembly part; the stator assembly part is used as an insert for plastic package to form an integrated stator assembly part with a water separating sleeve; and assembling the integrated stator assembly part with the water-separating sleeve, the magnetic yoke connecting plate and the valve body assembly together to complete the assembly of the integrated water inlet electromagnetic valve. The water separating sleeve is injected on the inner surfaces of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve, so that the thickness of the water separating sleeve is greatly reduced, and the acting force of electromagnetic force on the driving movable iron core is improved.

Description

Integrated water inlet electromagnetic valve and implementation method

Technical Field

The invention relates to the technical field of water inlet electromagnetic valve manufacturing, in particular to an integrated water inlet electromagnetic valve and an implementation method.

Background

In an automatic washing machine, a water inlet solenoid valve functions to switch on and off a water source. Because the water has a certain pressure during working, it can be designed into a non-stuffing box type pilot operated solenoid valve. FIG. 1 shows an exploded assembly view of a water inlet solenoid valve, including a plastic molded bobbin 400, which is currently used more commonly; an upper magnetically permeable inner sleeve 113 connected to one of the yokes 111; a lower magnetic conductive inner sleeve 114 connected with the second yoke 111; a hollow water stop jacket 117, a water stop jacket base 118 connected with the water stop jacket 117; the valve assembly comprises a return spring 200, a movable iron core 201, a flow hole valve plug rubber 202, a valve plug 203, a valve plug rubber 204, a valve body 205, a mounting bracket 206, a pressure reducing ring 207, a rubber gasket 208, a filter screen assembly 209, a plastic gasket 214 and the like.

The upper magnetic conduction inner sleeve 113 is installed in the middle hole of the plastic package coil rack 400 from top to bottom, the lower magnetic conduction inner sleeve 114 is installed in the middle hole of the plastic package coil rack 400 from bottom to top, and then the water isolating sleeve 117 is installed, so that the water isolating sleeve 117 contacts the upper and lower magnetic conduction

inner sleeves

113 and 114; then, the return spring 200 and the movable iron core 201 are installed in the inner hole of the water-stop jacket 117, and the flow hole valve plug rubber 202, the valve plug 203 and the valve plug rubber 204 are installed in a cavity enclosed by the water-stop jacket base 118 and the valve body 205.

Fig. 2 is a perspective view showing the water inlet solenoid valve formed by assembling the respective parts shown in fig. 1.

The working principle of the water inlet electromagnetic valve shown in fig. 1 and 2 is as follows: when the winding 109 is not energized, the movable iron core 201 falls down due to its own weight and the reaction force of the return spring, and the flow hole 210 of the main valve plug 203 is closed, so that the water entering the upper chamber of the valve plug from the balance hole 213 cannot leak out. When the winding 109 is energized, the electromagnetic attraction attracts the movable core 201 upward, and the water in the valve plug upper chamber 211 is discharged to the valve outlet through the through hole 210. Because the flow capacity of the flow hole is designed to be far larger than that of the balance hole 213, the water flow generates enough pressure loss on the balance hole 213, the pressure in the valve plug upper cavity 211 is rapidly reduced, and the pressure in the valve plug lower cavity 212 is maintained to be the same as that of the inlet, so that the pressure difference between the upper part and the lower part of the valve plug diaphragm enables the valve plug diaphragm to be expanded upwards, the valve is opened, and the water flow is conducted.

The main problem of the water inlet solenoid valve shown in fig. 1 and 2 is that the water-proof sleeve 117 needs to be separately manufactured, and the manufactured water-proof sleeve is inserted into the magnetic conductive inner sleeve by an assembling manner, so that the water-proof sleeve 107 needs to have a certain thickness so as to bear the pressure impact generated when the valve is closed and the structural damage which may occur during mechanical assembly is installed in the central hole of the coil frame 104, resulting in that the non-working air gap of the existing water inlet solenoid valve is greater than 1.5mm (thereby resulting in that the gap between the movable electric core 201 inserted into the water-proof sleeve 117 and the magnetic conductive inner sleeve is too large), and thus more electromagnetic force is required to operate the movable iron core; in addition, separately manufacturing the water blocking sleeve also increases the manufacturing cost.

In addition, since the yoke 111 is mounted outside the molding layer 116 of the mold coil winding, the yoke 111 must be welded to the magnetically conductive inner sleeve in order to fix the yoke to the bobbin through the magnetically conductive inner sleeve, which increases the welding process and leads to an increase in cost.

Disclosure of Invention

The invention aims to provide an integrated water inlet electromagnetic valve and an implementation method thereof, which are used for improving the acting force of electromagnetic force on a driving movable iron core, simplifying the production process of manufacturing the water inlet electromagnetic valve and reducing the production cost.

The implementation method of the integrated water inlet electromagnetic valve according to the first embodiment of the invention comprises the following steps:

the upper end part of a magnetic yoke, the lower end part of the magnetic yoke, an upper magnetic conduction inner sleeve and a lower magnetic conduction inner sleeve are arranged at the two ends of the coil assembly to form a stator assembly part;

the stator assembly part is used as an insert for plastic package to form an integrated stator assembly part with a water separating sleeve;

and assembling the integrated stator assembly part with the water separating sleeve, the magnet yoke connecting plate and the valve body assembly together to complete the assembly of the integrated water inlet electromagnetic valve.

Preferably, the central hole of the coil frame is provided with a magnetic conduction inner sleeve limiting piece for positioning the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve, so that the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve keep a preset distance in the central hole of the coil frame.

Preferably, the upper and lower ends of the bobbin are respectively provided with a yoke positioning boss for positioning a yoke, and the upper and lower end portions of the yoke are provided with yoke positioning grooves and are embedded in the yoke positioning boss through the yoke positioning grooves.

Preferably, the step of performing plastic encapsulation based on the stator assembly to form the integrated stator assembly with the water-blocking sleeve includes:

the stator assembly part is placed into a mold for injecting plastic, the coil winding, the electronic element and part of the upper end part of the magnetic yoke and the lower end part of the magnetic yoke are wrapped by the plastic, and the inserting sheet, the coil rack middle hole provided with the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve and the connecting ends of the upper end part of the magnetic yoke and the lower end part of the magnetic yoke are exposed to form the plastic-sealed stator assembly part;

the plastic package stator assembly part is placed in a mold for plastic injection, and the water separating sleeve is injection-molded in a coil frame middle hole of the plastic package stator assembly part, so that the integrated stator assembly part with the water separating sleeve is formed.

Preferably, the step of performing plastic package on the basis of the stator assembly to form the integrated stator assembly with the water-blocking sleeve includes:

injecting plastic by placing the stator assembly into a mold, and injecting a water-blocking sleeve into a hole in a coil frame of the stator assembly;

and injecting plastic again to the stator assembly part with the water separating sleeve to form the integrated stator assembly part with the water separating sleeve, wherein the stator assembly part with the water separating sleeve comprises a plastic packaging layer which wraps the coil winding, the electronic element and part of the upper end part of the magnetic yoke and the lower end part of the magnetic yoke.

Preferably, the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve are cylindrical, and radial through holes for glue passing are formed in the cylinder walls.

Preferably, the inner surfaces of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve are provided with axial grooves, and the axial grooves are communicated with the radial through holes.

Preferably, the inner surfaces of the upper magnetic inner sleeve and the lower magnetic inner sleeve are provided with circumferential grooves, and the circumferential grooves are communicated with the axial grooves.

Preferably, the water separating sleeve is injection-molded on the inner surfaces of the upper magnetic conduction inner sleeve, the lower magnetic conduction inner sleeve and the coil rack limiting piece by injecting plastic into the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve which are arranged in the central hole of the coil rack; in the injection molding process, hot-melt plastic flows into the through holes of the magnetic conduction inner sleeve along the axial grooves of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve to form roots for fixing the injection molding water separation sleeve.

Preferably, in the injection molding process, the hot melt plastics in the axial grooves and the circumferential grooves of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve form an integrated structure with the injection molding waterproof sleeve after being cooled.

Preferably, the step of assembling the integrated stator assembly with the water stop sleeve with the yoke connecting plate and the valve body assembly comprises:

a yoke connecting plate is fixedly connected between the upper end part of a yoke and the lower end part of the yoke of the integrated stator assembly part with the water separating sleeve to form a stator assembly with the water separating sleeve;

and assembling the stator assembly with the water separating sleeve and the valve body assembly together.

According to a second embodiment of the invention, the method for realizing the integrated water inlet electromagnetic valve comprises the following steps:

forming a coil assembly having a central hole by mounting an element including an insert on a bobbin around which a coil winding is wound;

mounting a magnetic yoke on the coil assembly and then carrying out plastic packaging to form a plastic-packaged coil assembly with the magnetic yoke;

the upper magnetic conduction inner sleeve, the limiting piece and the lower magnetic conduction inner sleeve which are arranged together are used as inserts for injection molding to form a waterproof sleeve assembly;

and assembling the plastic package coil assembly with the magnetic yoke, the waterproof sleeve assembly and the valve body assembly together to complete the assembly of the integrated water inlet electromagnetic valve.

the coil frame wound with the coil winding is provided with the inserting sheet and then is subjected to plastic package to form a plastic package coil assembly without a magnetic yoke;

and assembling the plastic package coil assembly without the magnetic yoke, the water-resisting sleeve assembly and the valve body assembly together to finish the assembly of the integrated water inlet electromagnetic valve.

Preferably, the water jacket assembly comprises: the water separating sleeve is injection-molded on the inner surfaces of the upper magnetic conduction inner sleeve, the limiting piece and the lower magnetic conduction inner sleeve; the water-insulating sleeve base and the water-insulating sleeve are of an integrated structure; an upper magnetic conduction inner sleeve, a limiting piece and a lower magnetic conduction inner sleeve which are fixed together through injection molding.

Preferably, the inner surfaces of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve are provided with circumferential grooves, and the circumferential grooves are communicated with the axial grooves.

Preferably, plastic is injected into the upper magnetic conduction inner sleeve, the limiting piece and the lower magnetic conduction inner sleeve, and a water isolating sleeve base are injected into the inner surfaces of the upper magnetic conduction inner sleeve, the lower magnetic conduction inner sleeve and the limiting piece of the coil rack; in the injection molding process, hot-melt plastic flows into the through holes of the magnetic conduction inner sleeve along the axial grooves of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve to form roots for fixing the injection molding water separation sleeve.

Preferably, the step of assembling the plastic-packaged coil assembly with the magnetic yoke, the water-resisting sleeve assembly and the valve body assembly together comprises: the water-proof sleeve assembly is installed in the plastic-packaged stator assembly part with the magnet yoke to form an integrated stator assembly with the water-proof sleeve; and assembling the integrated stator assembly with the water separating sleeve and the valve body assembly together.

Preferably, the step of assembling the plastic package coil assembly without the magnetic yoke, the water-resisting sleeve assembly and the valve body assembly together comprises: mounting the magnetic yoke on a plastic-packaged coil assembly without the magnetic yoke; the water-proof sleeve assembly is installed on the plastic-packaged coil assembly provided with the magnet yoke, so that an integrated stator assembly with the water-proof sleeve is formed; and assembling the integrated stator assembly with the water separating sleeve and the valve body assembly together.

An integrated water inlet solenoid valve according to a first embodiment of the present invention comprises:

the coil assembly comprises a coil frame, a coil winding and an inserting sheet;

the upper end part of the magnetic yoke is clamped with the upper end of the coil assembly;

the lower end part of the magnetic yoke is clamped with the lower end of the coil assembly;

an upper magnetic conduction inner sleeve which is arranged in the central hole of the coil assembly and is connected with the upper end part of the magnetic yoke;

a lower magnetic conductive inner sleeve which is arranged in the central hole of the coil assembly and is connected with the lower end part of the magnetic yoke;

the water isolating sleeve is formed by injection molding on the inner surfaces of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve;

and the magnetic yoke connecting plate is used for connecting the upper end part of the magnetic yoke and the lower end part of the magnetic yoke together after the water separating sleeve is formed on the inner surfaces of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve in an injection molding mode.

Preferably, a magnetic conduction inner sleeve limiting piece for limiting the positions of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve is arranged in the central hole of the coil frame, so that the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve keep a preset distance in the central hole of the coil frame.

Preferably, the upper end and the lower extreme of coil former are equipped with the yoke location boss that is used for joint yoke upper end and yoke lower extreme portion respectively, yoke upper end and lower tip are equipped with and are used for the joint the yoke positioning groove of yoke location boss.

Preferably, the upper end portion and the lower end portion of the magnetic yoke have a concave-convex structure connected to the magnetic yoke connecting plate, and both ends of the magnetic yoke connecting plate have concave-convex structures matched with the concave-convex structures of the upper end portion and the lower end portion of the magnetic yoke.

An integrated water inlet solenoid valve according to a second embodiment of the present invention comprises:

a valve body assembly;

a coil assembly having a coil former, a coil winding and an insert;

the plastic packaging coil assembly is provided with a plastic packaging magnetic yoke and a plastic packaging layer of the coil assembly;

the waterproof jacket assembly is provided with a waterproof jacket formed by injection molding on the inner surfaces of the upper magnetic conduction inner jacket, the limiting piece and the lower magnetic conduction inner jacket.

An integrated water inlet solenoid valve according to a third embodiment of the present invention comprises:

a valve body assembly:

a coil assembly having a coil former, a coil winding and an insert;

the plastic package coil assembly comprises a plastic package layer for coating the coil assembly;

a magnetic yoke mounted on the plastic encapsulated coil assembly;

Preferably, the plastic envelope water jacket subassembly includes: the water isolating sleeve and the water isolating sleeve base are injection molded on the inner surfaces of the upper magnetic conduction inner sleeve, the limiting piece and the lower magnetic conduction inner sleeve; an upper magnetic conduction inner sleeve, a limiting piece and a lower magnetic conduction inner sleeve which are fixed together through injection molding.

Preferably, the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve are cylindrical, and are respectively provided with a water-resisting sleeve attachment structure which enables the injection-molded water-resisting sleeve to be attached to the inner surfaces of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve.

Preferably, the water-blocking jacket attachment structure comprises a radial through hole for gluing.

Preferably, the water-separating sleeve attachment structure further comprises a groove disposed on the inner surface of the upper magnetic-conductive inner sleeve and the lower magnetic-conductive inner sleeve.

Preferably, the groove comprises an axial groove communicating with the radial through hole.

Preferably, the groove comprises a circumferential groove communicating with the axial groove.

Compared with the prior art, the invention has the beneficial technical effects that 1) the water separating sleeve is injected on the inner surfaces of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve, so that the thickness of the water separating sleeve can be greatly reduced, and the acting force of electromagnetic force on the driving movable iron core is improved; 2) the magnetic yoke and the coil assembly are fixed together through injection molding, so that the production process for manufacturing the water inlet electromagnetic valve can be simplified, the production cost is reduced, and the product quality is improved.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments, so as to further understand the contents, features and technical effects of the present invention.

Drawings

FIG. 1 is an exploded view of a prior art water inlet solenoid valve;

FIG. 2 is a perspective view showing a conventional water inlet solenoid valve;

fig. 3 is a perspective view of a bobbin of the water inlet solenoid valve according to the first embodiment of the present invention;

fig. 4 is a sectional view of the bobbin of fig. 3;

fig. 5 shows a perspective view of the bobbin shown in fig. 3 after the insert has been fitted thereon;

FIG. 6 is a perspective view of a coil assembly of the water inlet solenoid valve in accordance with the first embodiment of the present invention;

FIG. 7a is a front view of an upper magnetically permeable inner sleeve or a lower magnetically permeable inner sleeve of the present invention;

FIG. 7b is a cross-sectional view A-A of FIG. 7a of the present invention;

FIG. 7c is a cross-sectional view B-B of FIG. 7a in accordance with the present invention;

FIG. 7d is a perspective view of a first example of an upper magnetically permeable inner sleeve or a lower magnetically permeable inner sleeve of the present invention;

FIG. 8a is a front view of an alternative top or bottom magnetically permeable inner sleeve of the present invention;

FIG. 8b is a cross-sectional view A-A of FIG. 8a of the present invention;

FIG. 8c is a cross-sectional view B-B of FIG. 8a in accordance with the present invention;

FIG. 8d is a perspective view of an alternative magnetically upper or lower inner sleeve of the present invention;

FIG. 9 is an assembled exploded view of the water inlet solenoid valve stator assembly of the first embodiment of the present invention;

FIG. 10 is a perspective view of the water inlet solenoid valve stator assembly of the first embodiment of the present invention;

FIG. 11 is a perspective view of a overmolded stator assembly formed in accordance with the present invention after overmolding of the stator assembly shown in FIG. 10;

fig. 12 is a cross-sectional view of the overmolded stator assembly shown in fig. 11;

FIG. 13 is a perspective view of a stator assembly with water spacers formed in accordance with the present invention by overmolding the overmolded stator assembly shown in FIG. 11;

FIG. 14 is a cross-sectional view of the stator assembly with the water spacer shown in FIG. 13;

FIG. 15 is an exploded view of the water inlet solenoid valve according to the first embodiment of the present invention;

FIG. 16 is a perspective view of a water inlet solenoid valve in accordance with a first embodiment of the present invention;

FIG. 17 is a sectional view of a water inlet solenoid valve according to a first embodiment of the present invention;

fig. 18 is a perspective view of a bobbin of a water inlet solenoid valve according to a second embodiment of the present invention;

FIG. 19 is a cross-sectional view of FIG. 18;

fig. 20 is a view of the bobbin shown in fig. 18 with an insert sheet inserted thereon;

fig. 21 is a schematic view of a bobbin assembly formed after winding a coil winding on the bobbin of fig. 20 with the insert inserted;

fig. 22 is a view of a bobbin assembly and a yoke of a water inlet solenoid valve in accordance with a second embodiment of the present invention;

fig. 23 is a schematic view of the yoke-mounted molded coil assembly of fig. 22 after the yoke has been mounted to the bobbin assembly and molded;

FIG. 24 is a cross-sectional view of FIG. 23;

FIG. 25 is a schematic view of the assembly of the upper magnetic conductive inner sleeve, the limiting member and the lower magnetic conductive inner sleeve of the water inlet solenoid valve according to the second embodiment of the present invention;

FIG. 26 is a perspective view of a water inlet solenoid valve water jacket assembly according to a second embodiment of the present invention;

FIG. 27 is a cross-sectional view of FIG. 26;

FIG. 28 is an exploded view of the water inlet solenoid valve of the second embodiment of the present invention;

FIG. 29 is a perspective view of a water inlet solenoid valve in accordance with a second embodiment of the present invention;

FIG. 30 is a cross-sectional view of FIG. 29;

fig. 31 is a perspective view of the plastic molded bobbin without a yoke according to the third embodiment of the present invention;

FIG. 32 is a perspective view of FIG. 31;

FIG. 33 is an exploded view of the water inlet solenoid valve of the third embodiment of the present invention;

FIG. 34 is a perspective view of a water inlet solenoid valve in accordance with a third embodiment of the present invention;

FIG. 35 is a sectional view of a water inlet solenoid valve of a third embodiment of the present invention;

FIG. 36 is a schematic view of a method of implementing the first embodiment of the water inlet solenoid valve of the present invention;

FIG. 37 is a schematic view of a method of implementing the second embodiment of the water inlet solenoid valve of the present invention;

FIG. 38 is a schematic diagram of a method for implementing the third embodiment of the water inlet solenoid valve of the present invention.

Description of reference numerals: stator assembly with water-proof sleeve-100; plastic packaging stator assembly parts-101; a stator assembly 102; -103 a coil assembly; a bobbin-104; a magnetic yoke positioning boss-105; a limiting member-106; a first tab-107-1; a first tab coil winding lead connection portion-107-11; a first electronic element connection portion 107-12 of the first tab; a second tab-107-2; a second electronic element connecting part-107-23 of the second insert sheet; a third insert sheet-107-3; a coil winding lead connecting part-107-31 of the third plug sheet; connection-107-32 of the first electronic element of the third insert; connecting part-107-33 of the second electronic element of the third insert sheet; an electronic component-108; coil winding-109; a magnetic yoke positioning boss-110; a yoke-111; yoke first end-111-1; yoke second end-111-2; yoke connecting plate-111-3; a magnet yoke positioning groove-112; an upper magnetic conduction inner sleeve-113; a lower magnetically permeable inner sleeve-114; glue through hole-115; plastic-sealed layer-116; a water-insulating sleeve-117; a water-insulating jacket base-118; inner cavity-119 of water-proof jacket; welding a cover-120; a magnetic conductive seat-121; an axial internal groove-122; a circumferential inner groove-122'; bond seam-123; water-separating jacket top-124; a return spring-200; a movable iron core-201; flow orifice valve plug rubber-202; a valve plug-203; valve plug rubber-204; a valve body 205; a mounting bracket-206; a decompression ring-207; a rubber gasket-208; filter screen assembly-209; flow-through hole-210; a valve plug upper chamber-211; a plug lower cavity-212; balance hole-213; a plastic washer-214; water inlet-215; a water outlet-216; a water-resisting jacket assembly-300; plastic-encapsulated stator assembly part-400 with magnet yoke; plastic encapsulated stator assembly-500 without yokes.

Detailed Description

Fig. 36 shows a method for implementing a water inlet solenoid valve according to the present invention, which includes: a stator assembling member 102 is constituted by mounting an upper end portion of a magnetic yoke, a lower end portion of the magnetic yoke, an upper magnetically conductive inner sleeve and a lower magnetically conductive inner sleeve at both ends of the coil block 13, see fig. 9; performing plastic packaging by taking the stator assembly 102 as an insert to form an integrated stator assembly 100 with a water separating sleeve 117, referring to fig. 13 and 14; the assembly of the integrated water inlet solenoid valve is completed by assembling the integrated stator assembly 100 with the water blocking sleeve with the yoke coupling plate 111-3 and the valve body assembly, see fig. 15.

The central hole of the bobbin 104 of the present invention has a magnetically permeable inner sleeve stopper 106, such as a stopper sleeve or a stopper rib (see fig. 4), for positioning the upper and lower magnetically permeable inner sleeves at a predetermined distance from each other in the central hole of the bobbin (see fig. 12). The limiting member 106 can also play a role in enhancing the rigidity of the water stop sleeve after the injection molding of the water stop sleeve.

The bobbin 104 of the present invention is provided at the upper and lower ends thereof with yoke-positioning bosses 105 (see fig. 3) for positioning the yoke, respectively, and the upper and lower yoke end portions 111-1 and 111-2 have yoke-positioning grooves 112 (see fig. 9) and are fitted into the yoke-positioning bosses 105 through the yoke-positioning grooves 112 (see fig. 9).

In one embodiment, the present invention is a method for forming an integrated stator assembly with a water-blocking sleeve by plastic molding based on a stator assembly, comprising the steps of:

the stator assembly part 102 is placed into a mold to be injected with plastic, the coil winding, the electronic element and part of the upper end part of the magnetic yoke and the lower end part of the magnetic yoke are wrapped by the plastic, and the inserting sheet, the coil rack middle hole provided with the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve and the connecting ends of the upper end part of the magnetic yoke and the lower end part of the magnetic yoke are exposed to form a plastic-sealed stator assembly part 101 (see fig. 10 and 11); the water-blocking sleeve is injection molded in a hole in a coil frame of the plastic-encapsulated stator assembly by placing the plastic-encapsulated stator assembly in a mold to inject plastic, forming an integrated stator assembly 100 with a water-blocking sleeve (see fig. 13 and 14).

In another example (not shown), the step of molding the stator assembly to form the integrated stator assembly with water-separating sleeve according to the present invention comprises:

injecting plastic by placing the stator assembly 102 into a mold, injection molding a water-blocking sleeve into a bore in a coil former of the stator assembly; the integrated stator assembly 100 with the water spacer 117 is formed by injection molding plastic again to the stator assembly having the water spacer which is injection molded, and includes a molding layer 116 (see fig. 13 and 14) which surrounds the coil windings, the electronic components, and a portion of the upper end portion of the yoke and the lower end portion of the yoke.

In one example of the present invention shown in fig. 7 a-7 d, the upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114 of the present invention are cylindrical, and the walls of the cylinders are provided with radial through holes 115 for passing glue. The inner surfaces of the upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114 are provided with axial grooves 122, and the axial grooves 122 are communicated with the radial through holes 115.

In one example of the invention shown in fig. 8 a-8 d, the inner surfaces of the upper magnetically permeable inner sleeve 113 and the lower magnetically permeable inner sleeve 114 are provided with a circumferential groove 122 ', which circumferential groove 122' communicates with the axial groove 112.

During the injection molding process, the water isolation sleeve 117 is injection molded on the inner surfaces of the upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114 and the coil rack limiting piece 106 by injecting plastic into the upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114 which are installed in the central hole of the coil rack (see fig. 13 and 14); the hot melted plastic flows into the through holes 115 along the axial grooves 112 of the upper and lower magnetically permeable

inner sleeves

113 and 114, forming roots for fixing the injection molding water insulation sleeve. After the hot melt plastics in the axial grooves 122 and the circumferential grooves 122' of the upper magnetic conduction inner sleeve 113 and the lower magnetic conduction inner sleeve 114 are cooled, the hot melt plastics and the injection water-stop sleeve form an integrated structure.

The method for assembling the integrated stator assembly 100 with the water stop sleeve with the yoke connecting plate and the valve body assembly comprises the following steps: a yoke connecting plate 111-3 is fixedly connected between the upper end part 111-1 of the yoke and the lower end part 111-2 of the yoke of the integrated stator assembly 100 with the water separation sleeve to form a stator assembly with the water separation sleeve; and assembling the stator assembly with the water separating sleeve and the valve body assembly together.

Compared with the technology of injection molding the upper and lower magnetic conductive inner sleeves as inserts together with the water separating sleeve and the coil frame, the method for manufacturing the integrated water inlet electromagnetic valve can greatly reduce working air gaps, and because the water separating sleeve is formed by injection molding in the central hole of the coil frame, a very thin water separating sleeve can be formed. The technology of ' injection molding the upper and lower magnetic conduction inner sleeves as inserts with the water separation sleeve and the coil rack ' is to perform injection molding on the magnetic conduction inner sleeve with the water separation sleeve and the coil rack together to form an integrated part ', so that a separate water separation sleeve needs to be manufactured; considering factors such as manufacturing process, strength and the like, the water-stop jacket must have a certain thickness, so that the thickness of the water-stop jacket is larger than that of the water-stop jacket formed by injection molding in the middle hole of the coil former. In addition, the technology of injection molding the upper and lower magnetic conductive inner sleeves as inserts together with the water-proof sleeve and the coil frame cannot plastically package the magnetic yoke, the coil winding, the insertion piece, the coil frame, the magnetic conductive inner sleeve and the water-proof sleeve together to form the integrated stator assembly 100.

Referring to fig. 15, the valve body assembly of the water inlet solenoid valve includes: a reset spring 200 and a movable iron core 201 which are arranged in a central hole of the stator component with a water separating sleeve; flow orifice plug rubber 202; a valve plug 203; a valve plug rubber 204; the valve body 205, the mounting bracket 207, the pressure reducing ring 207, the rubber gasket 208, the filter screen component 209 and other components, and the components of the valve body component of the water inlet electromagnetic valve are all the components of the existing water inlet electromagnetic valve, and the connection relationship is basically the same as that of the prior art, so the water inlet electromagnetic valve belongs to the prior art. The detailed description of the present invention pertaining to the prior art will be omitted for the sake of brevity.

Alternatively, the valve body assembly may further include: and the welding cover 120 is arranged in a magnetic conduction seat 121 connected with a welding disc in a hole in the stator assembly 100 with the water separating sleeve.

Fig. 3 to 6 show a specific process of forming the coil block 103 having the central hole according to the present invention, in which a bobbin 104 having the central hole is first manufactured, and yoke-positioning bosses 105 for positioning the magnetic yoke are respectively formed on both end surfaces of the bobbin, see fig. 3. The invention can further reduce the wall thickness of the cylindrical part of the coil former to 0.6 mm. A magnetically conductive inner sleeve limiting member 106, such as a limiting ring or a limiting rib, is disposed in the central hole of the bobbin 104 for positioning the upper magnetically conductive inner sleeve 113 and the lower magnetically conductive inner sleeve 114, so as to maintain a predetermined gap between the upper magnetically conductive inner sleeve 113 and the lower magnetically conductive inner sleeve 114 in the central hole of the bobbin 104, as shown in fig. 4. Then, the first insert sheet 107-1, the second insert sheet 107-2 and the third insert sheet 107-3 are mounted on the upper end surface of the bobbin 104. The first insert has a coil winding lead connection portion 107-11 and a first electronic component connection portion 107-12; the second plug-in sheet is provided with a connecting part 107-23 of a second electronic element; the third tab has coil winding lead connection portions 107-31, connection portions 107-32 of the first electronic component and connection portions 107-33 of the second electronic component, thereby lead-connecting the coil winding 109 between the first and second tabs; connecting a first electronic element between the first insert and the third insert; and connecting the second electronic element between the second insert sheet and the third insert sheet.

Referring to fig. 5, the coil assembly 103 shown in fig. 6 is formed by winding the coil winding 109 and soldering the electronic component 108. It should be noted that the order of winding the coil winding 109, mounting the electronic component 108, and mounting the tab 107 is not limited, and any one of the components may be mounted first or last. In addition, the electronic component 108 can be selectively installed or not installed as required, because the present invention aims to improve the acting force of the electromagnetic force on the driving movable iron core, simplify the production process of manufacturing the water inlet electromagnetic valve and reduce the production cost. As for how to further improve the water inlet solenoid valve by installing electronic components after improving the acting force of the electromagnetic force on the driving movable iron core, another invention of the inventor is to solve the problem.

Fig. 9-10 illustrate a process of forming the stator assembly 102 according to the present invention, in which the upper magnetic yoke positioning groove 112 of the upper magnetic yoke end 111-1 is engaged with the upper magnetic yoke positioning boss 105 of the coil bobbin 104, and the lower magnetic yoke positioning groove 112 of the lower magnetic yoke end 111-2 is engaged with the lower magnetic yoke positioning boss 105 of the coil bobbin 104, and then the upper magnetic inner sleeve 113 and the lower magnetic inner sleeve 114 are installed in the central hole of the coil assembly 103 via the upper and lower magnetic yoke ends, and the magnetic inner sleeve positioning member 106 in the central hole of the coil bobbin 104 defines the upper magnetic inner sleeve 113 and the lower magnetic inner sleeve 114 at a position capable of contacting with the upper magnetic yoke end 111-1 and the lower magnetic yoke end 111-2, thereby forming the stator assembly 102 shown in fig. 9 and 10.

Compared with the prior art, the invention can reduce the welding procedure of welding the magnet yoke 111 on the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve; in the prior art, one magnetic yoke is welded with an upper magnetic conduction inner sleeve, the other magnetic yoke is welded with a lower magnetic conduction inner sleeve, and then the two magnetic yokes are butted. Compared with the prior art, the invention can reduce the working procedures and the cost.

Fig. 11-14 illustrate the process of the stator assembly 100 with water compartment of the present invention, which is based on the stator assembly 102 or is an insert that is molded to form the stator assembly 100 with water compartment, comprising: the plastic-encapsulated stator assembly 101 shown in fig. 11 is formed by placing the stator assembly 102 shown in fig. 10 into a mold and injecting plastic once, and wrapping the coil winding 109, the part of the upper end portion 111-1 of the yoke and the part of the lower end portion 111-2 of the yoke and the electronic component 108 with plastic, but exposing the insert sheet 107, the hole in the coil former, and the connecting end of the upper end portion 111-1 of the yoke and the connecting end of the lower end portion 111-2 of the yoke; the plastic encapsulated stator assembly 101 is placed in a mold and plastic is injected for a second time, so that the water separating sleeve 117 is injected on the inner surfaces of the upper magnetic conductive inner sleeve 113, the limiting member 106 and the lower magnetic conductive inner sleeve 114 of the plastic encapsulated stator assembly 101, and the integrated stator assembly 100 with the water separating sleeve shown in fig. 13 is formed.

Fig. 14 shows a structure of the stator assembly 100 with the water blocking sleeve, in which the yoke upper end portion 111-1 and the yoke lower end portion 111-2 are tightly fixed to the coil block 103 by the molding layer 116, and the water blocking sleeve 117 is injection-molded on the inner walls of the upper magnetically permeable inner sleeve 113 and the lower magnetically permeable inner sleeve 114 of the coil form the water blocking sleeve 117 having a thickness of about 0.6mm in the hole of the coil form, that is, the present invention reduces the thickness of the water blocking sleeve 117 by an injection molding process. Compared with the water-proof sleeve with the thickness of 1.7mm in the prior art, the invention can greatly reduce the gap between the movable iron core 201 and the magnetic conduction inner sleeve and increase the acting force of the electromagnetic force on the movable iron core 201.

In addition, during the secondary injection molding of plastic, a base 118 of the water-blocking jacket having external threads is also injected, so that the stator assembly 100 with the water-blocking jacket can be screwed to the valve body 205 with internal threads when the water inlet solenoid valve is assembled, see fig. 15.

Fig. 7 a-7 d show a structure of the upper and lower magnetic conductive inner sleeves of the present invention, the upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114 of the present invention are cylindrical, the cylindrical wall is provided with a radial through hole 115 for passing glue, and the inner surface is provided with an axial magnetic conductive inner sleeve groove 122 (for facilitating the flow of hot melt plastic during injection molding), the axial magnetic conductive inner sleeve groove 122 is communicated with the radial through hole 115. By injecting plastic into the holes in the bobbin, which are fitted with the upper and lower magnetically permeable inner sleeves, the injection plastic for forming the water-blocking jacket flows into the magnetically permeable inner sleeve through-hole 115 along the grooves 122 of the upper and lower magnetically permeable inner sleeves, forming the root of the water-blocking jacket 117 for positioning injection molding, so that the water-blocking jacket 117 is firmly fixed to the upper and lower magnetically permeable

inner sleeves

113 and 114, which have been positioned by the magnetically permeable inner sleeve positioning ring 106. The upper and lower flux sleeves also have a joint seam 123.

Fig. 8 a-8 d show another configuration of the upper and lower magnetically permeable inner sleeves of the present invention, which differs from the configuration shown in fig. 7 a-7 d by the addition of circumferential magnetically permeable inner sleeve grooves 122'.

When the stator assembly 102 is injected with plastic once, the upper and lower ends of the magnetic yoke connecting the upper magnetic inner sleeve 113 and the lower magnetic inner sleeve 114 are compressed by a mold, and then plastic is injected to the other parts of the stator assembly 101 except the insert, so that the plastic encapsulated stator assembly 101 shown in fig. 11 and 12 is formed, and only the insert 107, the connecting ends of the upper and lower magnetic yoke ends 111-1 and 111-2, and the middle hole for performing secondary injection molding are exposed.

The material used for one-shot injection of the plastic into the mold for placing the stator assembly 102 of the present invention is a high flame retardant grade plastic, such as a flame retardant Polypropylene Plastic (PP) or polyamide Plastic (PA); the overmolded stator assembly 101 is placed in a mold and a second shot of plastic is a low flame retardant grade plastic, such as Bulk Molding Compound (BMC). Since the cost of the plastic with higher flame retardant grade is higher, the manufacturing cost can be reduced by using the plastic with low flame retardant grade in the secondary injection molding.

Fig. 15 to 17 show a first embodiment of an integrated water inlet solenoid valve of the present invention comprising a valve body assembly and a coil assembly 103 having a coil former, a coil winding and an insert (see fig. 6); the upper end part 111-1 of the magnetic yoke is clamped with the upper end of the coil assembly; a lower end part 111-2 of the magnetic yoke clamped with the lower end of the coil assembly (see fig. 9); an upper magnetically permeable inner sleeve 113 mounted in the bore of the coil assembly 103 and connected to the yoke upper end 111-1 (see fig. 9 and 10); a lower magnetically permeable inner sleeve 114 mounted in the bore of coil assembly 103 and connected to yoke lower end 111-2 (see fig. 9 and 10); a water-stop jacket 117 (see fig. 14) formed by injection molding on the inner surfaces of the upper magnetic-conductive inner sleeve 113 and the lower magnetic-conductive inner sleeve 114; and a yoke connecting plate 111-3 for connecting the upper end 111-1 and the lower end 111-2 of the yoke together after the water separating jacket 117 is formed on the inner surfaces of the upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114 by injection molding (see fig. 15 and 16).

In the first embodiment of the present invention, the yoke upper end portion 111-1 and the yoke lower end portion 111-2 have a concave-convex structure connecting the yoke connecting plates, and both ends of the yoke connecting plates have concave-convex structures matching the concave-convex structures of the yoke upper end portion 111-1 and the yoke lower end portion 111-2.

Fig. 37 shows a second embodiment of the method of implementing the integrated water inlet solenoid valve of the present invention, which comprises: forming a coil assembly 103 having a central hole by mounting an element including an insert sheet on a bobbin around which a coil winding is wound (see fig. 18 to 20); mounting a magnetic yoke 111 (see fig. 22) on the coil assembly 103, and then performing plastic packaging to form a plastic-packaged coil assembly 400 with the magnetic yoke (see fig. 23 and 24); performing injection molding by using the upper magnetic conductive inner sleeve 113, the limiting member 106 and the lower magnetic conductive inner sleeve 114 which are placed together as inserts to form a water blocking sleeve component 300 (see fig. 25-27); the plastic package coil assembly 400 with the magnet yoke, the water-resisting sleeve assembly 300 and the valve body assembly are assembled together, so that the integrated water inlet electromagnetic valve is assembled.

In a second embodiment of the method for implementing the integrated water inlet solenoid valve of the present invention, the water blocking sleeve assembly 300 includes: the water separating sleeve 117 is injection molded on the inner surfaces of the upper magnetic conduction inner sleeve 113, the limiting piece 106 and the lower magnetic conduction inner sleeve 114; a water-proof jacket base 118 integrated with the water-proof jacket 117; the upper magnetically permeable inner sleeve 113, the stopper 106, and the lower magnetically permeable inner sleeve 114 are fixed together by injection molding (see fig. 25 to 27).

The upper magnetic conduction inner sleeve 113 and the lower magnetic conduction inner sleeve 114 are cylindrical, and the cylinder walls are provided with radial through holes 115 for passing glue. The inner surfaces of the upper magnetically permeable inner sleeve 113 and the lower magnetically permeable inner sleeve 114 are provided with axial grooves 122, the axial grooves 122 are in communication with the radial through holes 115, see fig. 7a to 7 d.

Furthermore, the inner surfaces of the upper magnetically permeable inner sleeve 113 and the lower magnetically permeable inner sleeve 114 may also be provided with a circumferential groove 122 ', which circumferential groove 122' communicates with the axial groove 122, see fig. 8a to 8 d.

In the second embodiment of the implementation method of the integrated water inlet solenoid valve of the present invention, plastic is injected into the upper magnetic conductive inner sleeve, the limiting member and the lower magnetic conductive inner sleeve, and a water separating sleeve 117 and a water separating sleeve base 118 are injected into the inner surfaces of the upper magnetic conductive inner sleeve 113, the lower magnetic conductive inner sleeve 114 and the coil rack limiting member 106 (see fig. 26 and 27); in the injection molding process, hot-melt plastic flows into the through holes of the magnetic conduction inner sleeve along the axial grooves of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve to form roots for fixing the injection molding water separation sleeve.

In the injection molding process, after the hot melt plastics in the axial grooves 112 and the circumferential grooves 112' of the upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114 are cooled, the hot melt plastics and the injection molding water separation sleeve 117 form an integrated structure.

In a second embodiment of the method for implementing the integrated water inlet solenoid valve of the present invention, the step of assembling the plastic-sealed stator assembly 400 with a magnetic yoke, the water-resisting sleeve assembly 300, and the valve body assembly together includes: forming an integrated stator assembly with a water-proof sleeve by installing the water-proof sleeve assembly 300 into the plastic-encapsulated stator assembly 400 with a yoke; the integrated stator assembly with water-proof sleeve and valve body assembly are assembled together, see fig. 28.

Fig. 38 shows a third embodiment of the method of implementing the integrated water inlet solenoid valve of the present invention, which comprises: the plastic package is carried out after the insertion sheet is installed on the coil frame wound with the coil winding, so that a plastic package coil assembly 500 without a magnetic yoke is formed (see fig. 31); performing injection molding by using the upper magnetic conductive inner sleeve 113, the limiting member 106 and the lower magnetic conductive inner sleeve 114 which are placed together as inserts to form a water-stop sleeve assembly 300 (see fig. 25-27); the plastic-packaged coil assembly 500 without the magnetic yoke, the magnetic yoke 111, the water-resisting sleeve assembly 300 and the valve body assembly are assembled together, so that the integrated water inlet electromagnetic valve is assembled.

In a third embodiment of the method for implementing the integrated water inlet solenoid valve of the present invention, the water blocking sleeve assembly 300 includes: a waterproof sleeve 117 is injection molded on the inner surfaces of the upper magnetic conduction inner sleeve 113, the limiting piece 106 and the lower magnetic conduction inner sleeve 114; a water-proof jacket base 118 integrated with the water-proof jacket 117; the upper magnetically permeable inner sleeve 113, the stopper 106, and the lower magnetically permeable inner sleeve 114 are fixed together by injection molding (see fig. 25 to 27).

The upper magnetic conduction inner sleeve 113 and the lower magnetic conduction inner sleeve 114 are cylindrical, and the cylinder walls are provided with radial through holes 115 for passing glue. The inner surfaces of the upper and lower magnetically permeable

inner sleeves

113, 114 are provided with axial grooves 122, the axial grooves 122 communicating with the radial through holes 115, see fig. 7a to 7 d.

In the third embodiment of the implementation method of the integrated water inlet solenoid valve of the present invention, plastic is injected into the upper magnetic conductive inner sleeve, the limiting member and the lower magnetic conductive inner sleeve, and the water separating jacket 117 and the water separating jacket base 118 are injected into the inner surfaces of the upper magnetic conductive inner sleeve 113, the lower magnetic conductive inner sleeve 114 and the coil rack limiting member 106 (see fig. 26 and 27); in the injection molding process, hot-melt plastic flows into the through holes of the magnetic conduction inner sleeve along the axial grooves of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve to form roots for fixing the injection molding water separation sleeve.

In the third embodiment of the method for implementing the integrated water inlet solenoid valve of the present invention, the step of assembling the plastic-encapsulated coil assembly 500 without a magnetic yoke, the magnetic yoke 111, the water-stop sleeve assembly 300, and the valve body assembly together includes: mounting the magnetic yoke to a plastic encapsulated coil assembly 500 without a magnetic yoke; forming an integrated stator assembly with a water separation sleeve by installing the water separation sleeve assembly on the plastic package coil assembly 500 provided with the magnet yoke; the integrated stator assembly with the water stop sleeve and the valve body assembly are assembled together, see fig. 33-35.

Referring to fig. 18 to 30, the present invention also provides a second embodiment of an integrated water inlet solenoid valve, comprising: a valve body assembly; a coil assembly 103 having a bobbin, coil windings, and tabs (see fig. 18-21); a yoked plastic molded coil assembly 400 having a plastic molded yoke and a plastic molded layer 116 of a coil assembly (i.e., mounting yoke 11 shown in fig. 22 to coil assembly 103 shown in fig. 22 to form yoked plastic molded coil assembly 400 shown in fig. 23 and 24); the water stop sleeve assembly 300 is provided with a water stop sleeve 117 which is formed by injection molding on the inner surfaces of the magnetic conductive inner sleeve 113, the limiting piece 106 and the lower magnetic conductive inner sleeve 114.

A part of the waterproof jacket assembly 300 is installed in the middle hole of the plastic-encapsulated coil assembly 400 with the magnetic yoke, so as to form a stator assembly which takes the waterproof jacket base 118 as the bottom and comprises the magnetic yoke and the waterproof jacket. The stator assembly including the magnet yoke and water-blocking sleeve is then assembled with the valve assembly, see fig. 28.

The valve assembly includes a return spring 200, a movable iron core 201, a flow hole plug rubber 202, a plug 203, a plug rubber 204, a valve body 205, a mounting bracket 206, a pressure reducing ring 207, a rubber gasket 208, a filter screen assembly 209 plastic gasket 214, and the like, and the mounting manner thereof is conventional, and therefore, the description thereof is omitted.

The plastic package waterproof jacket assembly 300 of this embodiment includes: a water stop sleeve 117 and a water stop sleeve base 118 which are injection molded on the inner surfaces of the upper magnetic conductive inner sleeve 113, the limiting piece 106 and the lower magnetic conductive inner sleeve 114; an upper magnetically permeable inner sleeve 113, a limiter 106, and a lower magnetically permeable inner sleeve 118 (see fig. 25 to 27) fixed together by injection molding.

The upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114 in this embodiment are cylindrical, and both have a water blocking sleeve attachment structure for attaching the injection-molded water blocking sleeve to the inner surfaces of the upper magnetic conductive inner sleeve and the lower magnetic conductive inner sleeve.

The waterproof jacket attachment structure of this embodiment includes a radial through hole 115 for gluing; and grooves arranged on the inner surfaces of the upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114. The grooves include axial grooves 122 (see fig. 7a to 7d) communicating with the radial through-holes; and a circumferential groove 122' (see fig. 8a to 8d) communicating with the axial groove 122.

Referring to fig. 18 to 21, 25 to 27, and 31 to 35, the present invention also provides a third embodiment of an integrated water inlet solenoid valve, which includes: a valve body assembly; a coil assembly 103 having a bobbin, coil windings, and tabs (see fig. 18-21); a yoke-free overmolded coil assembly 500 comprising an overmolded layer 116 (see fig. 31) that encases coil assembly 103; a yoke 111 mounted on the overmolded coil assembly 500 without a yoke (see fig. 33 and 34); the water stop sleeve assembly 300 is provided with a water stop sleeve 117 formed by injection molding on the inner surfaces of the upper magnetic conductive inner sleeve 113, the limiting piece 106 and the lower magnetic conductive inner sleeve 114.

After the magnetic yoke 111 is mounted on the plastic-packaged coil assembly 500 without the magnetic yoke, a part of the waterproof jacket assembly 300 is mounted in the middle hole of the plastic-packaged coil assembly 500 without the magnetic yoke, so as to form a stator assembly which takes the waterproof jacket base 118 as the bottom and comprises the magnetic yoke and the waterproof jacket. The stator assembly including the yoke and the water-blocking sleeve is then assembled with the valve assembly, see fig. 33.

The waterproof jacket attachment structure of this embodiment includes a radial penetration hole 115 for passing glue; and grooves arranged on the inner surfaces of the upper magnetic conductive inner sleeve 113 and the lower magnetic conductive inner sleeve 114. The grooves include axial grooves 122 (see fig. 7a to 7d) communicating with the radial through-holes; and a circumferential groove 122' (see fig. 8a to 8d) communicating with the axial groove 122.

In summary, the present invention is characterized in that 1) a position limiting member is disposed in the middle of the cylinder of the coil rack for limiting the magnetic conductive inner sleeve and maintaining the rigidity and strength of the cylinder; 2) and mounting the upper end part and the lower end part of the magnetic yoke and the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve on the coil assembly 103 to form the plastic-sealed stator assembly part 101. 3) The water-stop sleeve component 300 is provided with the water-stop sleeve 117 which is formed by injection molding on the inner surfaces of the magnetic-conductive inner sleeve 113, the limiting piece 106 and the lower magnetic-conductive inner sleeve 114, so that the wall thickness of the water-stop sleeve is reduced, the distance between the inner wall of the magnetic-conductive inner sleeve and the outer cylindrical surface of the movable iron core is reduced, and the non-working air gap magnetic resistance of the electromagnetic valve is reduced.

Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in light of the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.

Claims

1. An implementation method of an integrated water inlet electromagnetic valve comprises the following steps:

the upper end part of a magnetic yoke, the lower end part of the magnetic yoke, an upper magnetic conduction inner sleeve and a lower magnetic conduction inner sleeve are arranged at two ends of a coil component with a coil rack, a coil winding and an insert sheet to form a stator assembly part;

assembling the integrated stator assembly part with the water separating sleeve, the magnet yoke connecting plate and the valve body assembly together to complete the assembly of the integrated water inlet electromagnetic valve;

the middle hole of the coil rack is provided with a magnetic conduction inner sleeve limiting piece used for limiting the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve so as to enable the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve to keep a preset distance in the middle hole of the coil rack.

2. The method as claimed in claim 1, wherein the bobbin is provided at upper and lower ends thereof with yoke-positioning bosses for positioning yokes, respectively, and the yoke upper and lower end portions have yoke-positioning grooves and are fitted into the yoke-positioning bosses through the yoke-positioning grooves.

3. The method of claim 2, wherein the step of overmolding the stator assembly to form the integrated stator assembly with the water retention sleeve comprises:

4. The method of claim 2, wherein the step of overmolding the stator assembly to form the unitary water jacketed stator assembly comprises:

and injecting plastic again to the stator assembly part with the water separating sleeve to form the integrated stator assembly part with the water separating sleeve, wherein the stator assembly part with the water separating sleeve comprises a plastic package layer which wraps the coil winding, the electronic element and part of the upper end part of the magnetic yoke and the lower end part of the magnetic yoke.

5. The method according to claim 3 or 4, wherein the upper and lower magnetically conductive inner sleeves are cylindrical, and the walls of the sleeves are provided with radial through holes for glue application.

6. The method of claim 5 wherein the inner surfaces of the upper and lower magnetically permeable inner sleeves are provided with axial grooves that communicate with the radial through-holes.

7. The method of claim 6 wherein the inner surfaces of the upper and lower magnetically permeable inner sleeves are provided with circumferential grooves that communicate with the axial grooves.

8. The method of claim 7, wherein the water isolation sleeve is injection molded into the inner surfaces of the upper and lower magnetically permeable inner sleeves and the bobbin limiter by injecting plastic into the upper and lower magnetically permeable inner sleeves that fit into the holes in the bobbin; in the injection molding process, hot-melt plastic flows into the through holes of the magnetic conduction inner sleeve along the axial grooves of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve to form roots for fixing the injection molding water separation sleeve.

9. The method of claim 8, wherein during injection molding, the hot melt plastic in the axial and circumferential grooves of the upper and lower magnetically permeable inner sleeves cools to form an integral structure with the injection molded water jacket.

10. The method of claim 1, wherein the step of assembling the integrated stator assembly with the water compartment with the yoke coupling plate and the valve body assembly comprises:

a magnetic yoke connecting plate is fixedly connected between the upper end part of a magnetic yoke of the integrated stator assembly part with the water-insulating sleeve and the lower end part of the magnetic yoke to form a stator assembly with the water-insulating sleeve;

11. An implementation method of an integrated water inlet electromagnetic valve comprises the following steps:

mounting a magnetic yoke on the coil assembly and then carrying out plastic package to form a plastic package coil assembly with the magnetic yoke;

12. An implementation method of an integrated water inlet electromagnetic valve comprises the following steps:

13. The method of claim 11 or 12, wherein the riser assembly comprises:

the water separating sleeve is injection-molded on the inner surfaces of the upper magnetic conduction inner sleeve, the limiting piece and the lower magnetic conduction inner sleeve;

the water separating sleeve base and the water separating sleeve are of an integrated structure;

an upper magnetic conduction inner sleeve, a limiting piece and a lower magnetic conduction inner sleeve which are fixed together through injection molding.

14. The method of claim 13, wherein the upper and lower magnetically permeable inner sleeves are cylindrical, and each of the walls of the cylinder is provided with a radial through hole for passing glue.

15. The method of claim 14 wherein the inner surfaces of the upper and lower magnetically permeable inner sleeves are provided with axial grooves that communicate with the radial through-holes.

16. The method of claim 15 wherein the inner surfaces of the upper and lower magnetically permeable inner sleeves are provided with circumferential grooves that communicate with the axial grooves.

17. The method of claim 16, wherein the water jacket and the water jacket base are injection molded from the inner surfaces of the upper and lower magnetically permeable inner sleeves and the bobbin limiter by injecting plastic into the upper magnetically permeable inner sleeve, the limiter and the lower magnetically permeable inner sleeve; in the injection molding process, hot-melt plastic flows into the through holes of the magnetic conduction inner sleeve along the axial grooves of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve to form roots for fixing the injection molding water separation sleeve.

18. The method of claim 17, wherein during injection molding, the hot melt plastic in the axial and circumferential grooves of the upper and lower magnetically permeable inner sleeves cools to form an integral structure with the injection molded water jacket.

19. The method of claim 11, wherein assembling the yoke plastic encapsulated coil assembly, the water jacket assembly, and the valve body assembly together comprises:

the water-proof sleeve assembly is installed in the plastic-packaged stator assembly part with the magnet yoke to form an integrated stator assembly with the water-proof sleeve;

and assembling the integrated stator assembly with the water separating sleeve and the valve body assembly together.

20. The method of claim 12, wherein assembling the plastic encapsulated coil assembly without a yoke, the water jacket assembly, and the valve body assembly together comprises:

mounting the magnetic yoke on a plastic-packaged coil assembly without the magnetic yoke;

the water-proof sleeve assembly is installed on the plastic-packaged coil assembly provided with the magnet yoke, so that an integrated stator assembly with the water-proof sleeve is formed;

21. An integrated water inlet electromagnetic valve comprises a valve body assembly and a coil assembly with a coil rack, a coil winding and an inserting piece;

further comprising:

the magnetic yoke connecting plate is used for connecting the upper end part of the magnetic yoke and the lower end part of the magnetic yoke together after the water separating sleeve is formed by injection molding on the inner surfaces of the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve;

the middle hole of the coil frame is provided with a magnetic conduction inner sleeve limiting piece used for limiting the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve so as to enable the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve to keep a preset distance in the middle hole of the coil frame.

22. The integrated water inlet electromagnetic valve of claim 21, wherein the coil rack is provided at upper and lower ends thereof with yoke positioning bosses for engaging with upper and lower ends of a yoke, respectively, and the upper and lower ends of the yoke are provided with yoke positioning grooves for engaging with the yoke positioning bosses.

23. The integrated water inlet solenoid valve of claim 21, wherein the yoke upper end and the yoke lower end have a concave-convex structure connecting the yoke connecting plate, and the yoke connecting plate has concave-convex structures at both ends matching with the concave-convex structures of the yoke upper end and the yoke lower end.

24. An integrated water inlet solenoid valve comprising:

a valve body assembly;

a coil assembly having a coil former, a coil winding and an insert;

further comprising:

25. An integrated water inlet solenoid valve comprising:

a valve body assembly:

a coil assembly having a coil former, a coil winding and an insert;

a magnetic yoke mounted on the plastic encapsulated coil assembly;

further comprising:

26. The integrated water inlet solenoid valve of claim 24 or 25, wherein the plastic-sealed water jacket assembly comprises:

the water isolating sleeve and the water isolating sleeve base are injection molded on the inner surfaces of the upper magnetic conduction inner sleeve, the limiting piece and the lower magnetic conduction inner sleeve;

27. An integrated water inlet solenoid valve according to claim 21, 24 or 25 wherein the upper and lower magnetically permeable inner sleeves are cylindrical and each have a water blocking sleeve attachment structure for attaching an injection molded water blocking sleeve to the inner surface of the upper and lower magnetically permeable inner sleeves.

28. An integrated water inlet solenoid valve according to claim 27 wherein the water barrier attachment structure includes a radial through hole for glue application.

29. The integrated water inlet solenoid valve of claim 28 wherein the water blocking jacket attachment structure further comprises grooves disposed on the inner surface of the upper and lower magnetically permeable inner sleeves.

30. The integrated water inlet solenoid valve of claim 29 wherein the groove comprises an axial groove communicating with the radial through hole.

31. The integrated water inlet solenoid valve of claim 30 wherein the groove comprises a circumferential groove in communication with the axial groove.