CN111853325B

CN111853325B - Integrated water inlet electromagnetic valve and implementation method

Info

Publication number: CN111853325B
Application number: CN201910363952.2A
Authority: CN
Inventors: 王红标; 敖林; 徐飞
Original assignee: Hanyu Group JSCL
Current assignee: Hanyu Group JSCL
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2023-05-30
Anticipated expiration: 2039-04-30
Also published as: CN110686119A; CN111853325A; CN114110238B; CN114110238A

Abstract

The invention discloses an integrated water inlet electromagnetic valve and an implementation method, wherein the method comprises the following steps: forming a coil assembly having a cavity by mounting an element comprising a tab on a bobbin around which a coil winding is wound; an upper magnetic conduction sleeve and a lower magnetic conduction sleeve are arranged in a cavity of the coil assembly, and a magnetic yoke respectively connected with the upper magnetic conduction sleeve and the lower magnetic conduction sleeve is fixed on the outer side of the coil assembly to form a stator assembly; plastic packaging is carried out on the basis of the stator assembly, so that an integrated stator assembly with a water-proof sleeve is manufactured; and assembling the integrated water inlet electromagnetic valve by assembling the stator assembly with the water blocking sleeve and other parts of the water inlet electromagnetic valve together.

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 plays a role in switching a water source. Because the water has a certain pressure during working, the valve can be designed into a stuffing box-free pilot valve action type electromagnetic valve. Fig. 1 and 2 show perspective views of a water inlet solenoid valve which is commonly used at present, comprising a plastic sealing layer 116 for sealing a gasket winding, a magnetic yoke 111 arranged outside the plastic sealing layer, a water inlet 215 and a water outlet 216 of a plug sheet 107.

Fig. 2 shows a structure which is more common in the current application and which is composed mainly of two parts, a pilot valve and a main valve. When the winding 109 is not electrified, the movable iron core 201 falls down due to the dead weight and the counterforce of the return spring to close the circulation hole 210 of the main valve plug 203, so that water entering the upper cavity of the valve plug from the balance hole 213 cannot leak, and the valve plug diaphragm is pressed on the main valve seat due to the pressure difference formed by the different effective bearing areas of the upper surface and the lower surface of the valve diaphragm, so that the valve is closed. When the winding 109 is energized, the electromagnetic attraction attracts the plunger 201 upward, and water in the valve plug upper cavity 211 leaks out through the flow hole 210 to the valve outlet. Because the flow capacity of the flow hole is designed to be far greater than that of the balance hole 213, enough pressure loss is generated on the balance hole 213 by the water flow, the pressure in the valve plug upper cavity 211 is rapidly reduced, the pressure in the valve plug lower cavity 212 is maintained to be the same as that of the inlet, and thus the pressure difference between the upper part and the lower part of the valve plug diaphragm enables the valve plug diaphragm to expand upwards, the valve is opened, and the water flow is conducted.

The water inlet solenoid valve shown in fig. 2 has a major problem in that the water blocking sleeve 117 needs to be manufactured separately, and the manufactured water blocking sleeve is inserted into the magnetic conductive sleeve in an assembling manner, so that the water blocking sleeve 107 needs to be installed in the middle hole of the coil former 104 by a certain thickness so as to bear pressure impact generated during valve closing and structural damage possibly occurring during mechanical assembly, resulting in that the non-working air gap of the existing water inlet solenoid valve is greater than 1.5mm (resulting in that the gap between the movable electric core 201 inserted into the water blocking sleeve 117 and the magnetic conductive sleeve is too large), and thus more electromagnetic force is required to actuate the movable electric core; in addition, manufacturing the water blocking sleeve alone increases manufacturing costs.

In addition, since the yoke 111 is mounted outside the plastic envelope 116 of the plastic-encapsulated coil winding, the yoke 111 must be welded with the magnetic sheath so as to be fixed to the bobbin by the magnetic sheath, which increases the welding process, resulting in 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 for manufacturing the water inlet electromagnetic valve and reducing the production cost.

A method for implementing an integrated water inlet solenoid valve according to a first example of the present invention includes:

forming a coil assembly having a cavity by mounting the insert sheet and the electronic element on a bobbin around which the coil winding is wound;

an upper magnetic conduction sleeve and a lower magnetic conduction sleeve are arranged in a cavity of the coil assembly, and a magnetic yoke respectively connected with the upper magnetic conduction sleeve and the lower magnetic conduction sleeve is fixed on the outer side of the coil assembly to form a stator assembly;

plastic packaging is carried out on the basis of the stator assembly, so that a stator assembly with a water-proof sleeve is manufactured;

and assembling the integrated water inlet electromagnetic valve by assembling the stator assembly with the water blocking sleeve and other parts of the water inlet electromagnetic valve together.

Preferably, the middle hole of the coil frame is provided with a magnetic sleeve positioning piece for positioning the upper magnetic sleeve and the lower magnetic sleeve so as to keep a preset gap between the upper magnetic sleeve and the lower magnetic sleeve at the middle hole of the coil frame, and the positioning piece can be a positioning ring or a positioning rib, for example, and forms an integral structure with the coil frame through injection molding.

Preferably, the upper end and the lower end of the coil frame are respectively provided with a magnetic yoke positioning boss for positioning a magnetic yoke, and the magnetic yoke is provided with a magnetic yoke positioning groove; the magnetic yoke is embedded into the magnetic yoke positioning boss through the magnetic yoke positioning groove.

Preferably, the step of forming the stator assembly with the water barrier sleeve by plastic packaging based on the stator assembly comprises the following steps: the stator assembly is put into a mould to be injected with plastic, the coil winding, the magnetic yoke and the electronic element are wrapped by the plastic, but the inserting sheet and the middle hole of the coil frame provided with the upper magnetic conduction sleeve and the lower magnetic conduction sleeve are exposed, so that the plastic package stator assembly is formed; the plastic package stator assembly is put into a mould to be injected with plastic, and the water-proof sleeve is injection-molded in the middle hole of the coil frame of the plastic package stator assembly, which is provided with the upper magnetic conduction sleeve and the lower magnetic conduction sleeve.

Preferably, the upper magnetic sleeve and the lower magnetic sleeve are cylindrical, the cylinder walls are provided with radial through holes for glue, the inner surfaces of the upper magnetic sleeve and the lower magnetic sleeve are provided with axial magnetic sleeve grooves, and the axial magnetic sleeve grooves are communicated with the radial through holes.

Preferably, the root of the water-blocking sleeve for positioning injection molding is formed by injecting plastic into the holes in the coil frame provided with the upper and lower magnetic sleeves, and the injected plastic for forming the water-blocking sleeve flows into the magnetic sleeve through holes along the grooves of the upper and lower magnetic sleeves.

Preferably, when plastic is injected into the stator assembly, the connecting part of the magnetic yoke connecting the upper magnetic sleeve and the lower magnetic sleeve is pressed by a mold, and then plastic is injected into other parts of the stator assembly except for the inserting sheets.

Preferably, the stator assembly is placed in a mold and the material used for injecting the plastic is a high flame retardant grade plastic; and placing the plastic package stator assembly into a mold, and injecting plastic into the mold to obtain the plastic with low flame retardant grade.

Preferably, the step of forming the stator assembly with the water barrier sleeve by plastic packaging based on the stator assembly comprises the following steps:

the stator assembly is put into a mould for one-time injection of plastic, the coil winding, the magnetic yoke and the electronic element are wrapped by the plastic, and the water-proof sleeve is injection-molded in a middle hole of the coil frame provided with the upper magnetic conduction sleeve and the lower magnetic conduction sleeve.

Preferably, the water barrier with the top of the water barrier is injection molded by placing the plastic encapsulated stator assembly into a mold and injecting plastic.

Preferably, the step of forming the stator assembly with the water barrier by plastic packaging based on the stator assembly comprises:

the stator assembly is placed into a mold, plastic is injected, the coil winding, the magnetic yoke and the electronic element are wrapped by the plastic, and the inserting sheet and the middle hole of the coil frame provided with the upper magnetic conduction sleeve and the lower magnetic conduction sleeve are exposed, so that the plastic package stator assembly is formed;

the plastic-sealed stator assembly and the magnetic conduction seat are put into a mould to be injected with plastic, and a water-proof sleeve fixedly connected with the magnetic conduction seat is injection-molded in a middle hole of a coil frame of the plastic-sealed stator assembly, wherein the coil frame is provided with an upper magnetic conduction sleeve and a lower magnetic conduction sleeve.

A method for implementing an integrated water inlet solenoid valve according to a second embodiment of the present invention includes:

inserting the upper magnetic sleeve and the lower magnetic sleeve into the middle hole of the coil rack to form a coil rack assembly;

the water-proof sleeve is injection molded in the middle hole of the coil frame assembly to manufacture a basic plastic package assembly;

winding a coil winding on a coil frame of a base assembly, mounting an electronic element, inserting an inserting sheet and mounting a magnetic yoke, and performing plastic packaging to form an integrated stator assembly;

and assembling the integrated stator assembly and the valve body assembly together to complete the assembly of the integrated water inlet electromagnetic valve.

According to a third example of the present invention, a method for implementing an integrated water inlet solenoid valve includes:

the upper magnetic conduction sleeve and the lower magnetic conduction sleeve are insert-molded into the water-blocking sleeve to form a water-blocking sleeve component with the magnetic conduction sleeve;

inserting a water-blocking sleeve assembly with a magnetic conduction sleeve into a cavity of the coil assembly to form a stator assembly;

the magnetic yoke is mounted on the stator assembly, and plastic packaging is carried out, so that an integrated plastic packaging stator assembly for plastic packaging of the coil winding and the magnetic yoke on the stator assembly is formed;

the integrated stator component and the valve body component are assembled together to complete the assembly of the integrated water inlet electromagnetic valve,

the stator assembly comprises a coil rack, coil windings wound on the coil rack and inserting sheets inserted on the coil rack.

An integrated water inlet solenoid valve according to a first example of the invention, comprising:

a coil assembly formed by mounting the coil winding and the tab on the bobbin;

a stator assembly formed by installing an upper magnetic sleeve, a lower magnetic sleeve and a magnetic yoke in a cavity of the coil assembly, wherein the magnetic yoke is connected with the upper magnetic sleeve and the lower magnetic sleeve and is positioned outside the coil assembly;

an integrated stator assembly with a water barrier formed by plastic packaging based on the stator assembly;

and a valve body assembly assembled with the integrated stator assembly.

An integrated water inlet solenoid valve according to a second example of the invention, comprising:

a bobbin assembly formed by inserting the upper and lower magnetic sleeves into the bobbin center holes;

a base plastic package assembly made by injection molding a water blocking sleeve in a middle hole of the coil former assembly;

an integrated stator assembly formed by plastic packaging after winding coil windings, mounting electronic elements, inserting pieces and mounting magnetic yokes on a coil frame of a base assembly;

and a valve body assembly assembled with the integrated stator assembly.

An integrated water inlet solenoid valve according to a third example of the invention, comprising:

the water-blocking sleeve component with the magnetic conduction sleeve is formed by injection molding the water-blocking sleeve by using the upper magnetic conduction sleeve and the lower magnetic conduction sleeve as inserts;

a stator assembly formed by inserting a water blocking sleeve assembly with a magnetic conductive sleeve into a cavity of the coil assembly;

the integrated plastic-sealed stator assembly is formed by mounting the magnetic yoke on the stator assembly and plastic-sealing the coil winding and the magnetic yoke on the stator assembly;

and a valve body assembly assembled with the integrated stator assembly.

Compared with the prior art, the integrated water inlet electromagnetic valve has the beneficial effects that the water blocking sleeve is injection molded in the stator assembly, the thickness of the water blocking sleeve can be greatly reduced, the acting force of electromagnetic force on the driving movable iron core is improved, meanwhile, the magnetic yoke and the coil assembly are fixed together through injection molding, 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 drawings and examples to further understand the contents, features and technical effects of the present invention.

Drawings

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

FIG. 2 is a sectional view showing a specific structure of a conventional water inlet solenoid valve;

FIG. 3 is a perspective view of a coil form of the water inlet solenoid valve of the present invention;

FIG. 4 is a cross-sectional view of a coil form of the water inlet solenoid valve of the present invention;

FIG. 5 is a perspective view of the bobbin of the present invention with the tab attached;

FIG. 6 is a perspective view of a coil assembly of the water inlet solenoid valve of the present invention;

FIG. 7 is an exploded view of the stator assembly of the water inlet solenoid valve of the present invention;

FIG. 8 is a perspective view of a stator assembly of the water inlet solenoid valve of the present invention;

FIG. 9 is a perspective view of a plastic encapsulated stator assembly of the water inlet solenoid valve of the present invention;

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

FIG. 11 is a front view of a first embodiment of the upper magnetically permeable inner housing of the water inlet solenoid valve of the present invention;

FIG. 12 is a cross-sectional view A-A of FIG. 11 in accordance with the present invention;

FIG. 13 is a B-B cross-sectional view of FIG. 11 in accordance with the present invention;

FIG. 14 is a perspective view of a first embodiment of the upper magnetically permeable inner housing of the water inlet solenoid valve of the present invention;

FIG. 15 is a perspective view of a stator assembly with a water blocking sleeve of the water inlet solenoid valve of the present invention;

FIG. 16 is a cross-sectional view of a stator assembly with a water shield of the water inlet solenoid valve of the present invention;

FIG. 17 is an exploded view of the water inlet solenoid valve of the present invention;

FIG. 18 is a perspective view of the water inlet solenoid valve of the invention;

FIG. 19 is a cross-sectional view of a water inlet solenoid valve made in accordance with the first embodiment of the invention;

FIG. 20 is a cross-sectional view of a water inlet solenoid valve made in accordance with a second embodiment of the invention;

FIG. 21 is a cross-sectional view of a stator assembly with a water jacket made in accordance with a third embodiment of the present invention;

FIG. 22 is a cross-sectional view of a water inlet solenoid valve made in accordance with a fourth embodiment of the invention;

FIG. 23 is a front view of a second embodiment of the upper magnetically permeable inner housing of the water inlet solenoid valve of the present invention;

FIG. 24 is a cross-sectional view A-A of FIG. 23 in accordance with the present invention;

FIG. 25 is a B-B cross-sectional view of FIG. 23 in accordance with the present invention;

FIG. 26 is a perspective view of a second embodiment of the upper magnetically permeable inner housing of the water inlet solenoid valve of the present invention;

fig. 27 is a schematic diagram of a method of implementing a water inlet solenoid valve of the present invention.

Reference numerals illustrate: a stator assembly-100 with a water barrier; plastic packaging the stator assembly-101; a stator assembly 102; a coil assembly-103; a coil former-104; a yoke positioning boss-105; a magnetic sleeve positioning ring-106; insert-107; a first insert sheet-107-1; the first insert coil winding lead connection part-107-11; first tab electronic element connection 107-12; a second insert sheet-107-2; second tab electronic element connections-107-23; third insert sheet-107-3; the third insert coil winding lead connection part-107-31; third tab first electronic element connection portion-107-32; third tab second electronic element connection portion-107-33; -an electronic component-108; coil windings-109; a yoke positioning boss-110; a yoke-111; yoke positioning grooves-112; an upper magnetic conduction inner sleeve-113; a lower magnetically conductive inner sleeve 114; the magnetic conduction sleeve passes through the glue hole-115; plastic layer-116; a water barrier 117; a water-blocking sleeve base-118; water-blocking sleeve inner cavity-119; welding the cover-120; a magnetically permeable seat-121; the magnetic conduction sleeve is axially provided with an inner groove-122; radial inner groove-122' of magnetic conduction sleeve; magnetic sleeve joint-123; a water barrier top-124; a return spring-200; a movable iron core-201; flow-through-hole plug rubber-202; a valve plug-203; valve plug rubber-204; a valve body 205; a mounting bracket-206; a decompression ring-207; rubber gasket-208; filter screen assembly-209; a flow hole-210; a valve plug upper cavity-211; a valve plug lower cavity-212; balance hole-213; a plastic gasket-214; a water inlet-215; and water outlet-216.

Detailed Description

Fig. 27 shows a method for implementing a water inlet solenoid valve according to the invention, comprising: forming a coil assembly 103 having a cavity by mounting a tab 107 and an electronic component 108 on a bobbin 104 around which a coil winding 109 is wound, see fig. 3-6; the stator assembly 102 is formed by installing an upper magnetic sleeve 113 and a lower magnetic sleeve 114 in a cavity on the coil assembly 103, and fixing a magnetic yoke 111 respectively connected with the upper magnetic sleeve 113 and the lower magnetic sleeve 114 outside the coil assembly 103, see fig. 7-8; plastic packaging is carried out on the basis of the stator assembly 102 to form an integrated stator assembly 100 with a water barrier, see fig. 9-10; the assembly of the integrated inlet solenoid valve is accomplished by assembling the integrated stator assembly 100 and the valve body assembly together, see fig. 17 and 18.

On the other hand, the water inlet electromagnetic valve can be realized by the following method: inserting the upper and lower

magnetic sleeves

113, 114 into the bobbin 104 to form a bobbin assembly; the water-proof sleeve is injection molded in the middle hole of the coil frame assembly to manufacture a basic plastic package assembly; the integrated stator assembly 100 is formed by mounting the coil windings, the electronic elements, the insert pieces and the yoke on the bobbin of the base assembly and then plastic packaging; the integrated stator assembly 100 and the valve body assembly are assembled together to complete the assembly of the integrated water intake solenoid valve.

In addition, the water inlet electromagnetic valve can be realized by adopting the following method that the upper magnetic conduction sleeve 113 and the lower magnetic conduction sleeve 114 are insert or basic injection molding water isolation sleeves to form a magnetic conduction sleeve water isolation sleeve component; inserting the magnetic conduction sleeve water-blocking sleeve component into a cavity of the coil component to form a stator component with the water-blocking sleeve; the magnetic yoke is mounted on the stator assembly with the water-proof sleeve for plastic packaging, so that an integrated plastic-packaged stator assembly 100 of the plastic-packaged coil winding, the magnetic yoke and the magnetic conduction sleeve water-proof sleeve assembly is formed; the integrated stator assembly 100 and the valve body assembly are assembled together to complete the assembly of the integrated water intake solenoid valve.

Compared with the technology of taking the upper and lower magnetic sleeves as inserts to be injection molded together with the water-proof sleeve and the coil frame, the method for manufacturing the integrated water-inlet electromagnetic valve can greatly reduce the working air gap, and the water-proof sleeve can be formed into a very thin water-proof sleeve by injection molding in the middle hole of the coil frame. The technology of taking the upper and lower magnetic sleeves as inserts to be injection molded together with the water-proof sleeve and the coil rack is to injection mold the magnetic sleeves together with the water-proof sleeve and the coil rack into an integrated part, so that a separate water-proof sleeve needs to be manufactured; in consideration of the manufacturing process, strength and other factors, the water blocking sleeve must have a certain thickness, so that the thickness of the water blocking sleeve is larger than that of the water blocking sleeve formed by injection molding of the middle hole of the coil frame. In addition, the technology of injection molding the upper and lower magnetic sleeves as inserts together with the water-blocking sleeve and the coil frame cannot mold the magnetic yoke, the coil winding, the inserting piece, the coil frame, the magnetic sleeves and the water-blocking sleeve together to form the integrated stator assembly 100.

Referring to fig. 17, a valve body assembly of the water inlet solenoid valve includes: a return spring 200 and a movable iron core 201 fitted into a hole in the stator assembly 100 with a water blocking sleeve; flow through Kong Fasai rubber 202; a valve plug 203; a valve plug rubber 204; the valve body 205, the mounting bracket 207, the rubber gasket 208 of the decompression ring 207, the filter screen assembly 209 and other components of the valve body assembly of the water inlet electromagnetic valve are all components of the existing water inlet electromagnetic valve, and the connection relationship of the components is basically the same as that of the prior art, thus belonging to the prior art. For the sake of brevity, detailed descriptions of contents belonging to the prior art are omitted. .

Alternatively, the valve body assembly may further include: the cover 120 is welded and the magnetic conductive base 121 of the connecting welding disk is installed in the hole of the stator assembly 100 with the water-proof sleeve.

Fig. 3 to 6 show a specific process of forming the coil block 103 having the cavity of the present invention, first, a bobbin 104 having a central hole is manufactured, and yoke positioning bosses 105 for positioning yokes 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 frame to 0.6mm. Wherein, the middle hole of the coil frame 104 is provided with a magnetic sleeve positioning member 106, such as a positioning ring or a positioning rib, for positioning the upper magnetic sleeve 113 and the lower magnetic sleeve 114, so as to maintain a predetermined gap between the upper magnetic sleeve 113 and the lower magnetic sleeve 114 at the middle hole of the coil frame 104, see fig. 4. Then, installing a plug-in sheet 107 on the upper end surface of the coil former 104, see fig. 5; the coil winding 109 and the welding electronics 108 are wound to form the coil assembly 103 shown in fig. 6. 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 according to the requirement, because the purpose of the invention is to improve the acting force of electromagnetic force on the driving movable iron core, simplify the production process for manufacturing the water inlet electromagnetic valve and reduce the production cost. As for how to further improve the water inlet solenoid valve by mounting electronic components after the force of electromagnetic force on the driving movable iron core is increased, another invention of the present inventor is a problem to be solved.

Referring to fig. 5, the tab 107 of the present invention includes: a first tab 107-1 having a first tab coil winding lead connection 107-11, a first tab electronic element connection 107-12; a second tab 107-2 having a second tab electronic element connection 107-23; the third tab 107-3 has a third tab coil winding lead connection 107-31, a third tab first electronic element connection 107-32, and a third tab second electronic element connection 107-33.

Fig. 7-8 illustrate the process of constructing the stator assembly 102 of the present invention, wherein the upper and lower

magnetic sleeves

113, 114 are mounted in the cavity of the coil assembly 103, and the upper and lower

magnetic sleeves

113, 114 are defined by the magnetic sleeve positioning ring 106 in the bore of the coil former 104 in a position where they can contact the yoke 112; then, the yoke positioning grooves 112 of the yoke 111 are caught by the yoke positioning bosses 105 of the upper and lower end surfaces of the bobbin 104, so that the yoke 111 is positioned on the bobbin 104 on the one hand and is brought into close contact with the upper and lower

magnetic sleeves

113 and 114 on the other hand to form a connection, thereby forming the stator assembly 102 shown in fig. 8.

Compared with the prior art, the invention can reduce the welding procedure of welding the magnetic yoke 111 on the upper magnetic sleeve and the lower magnetic sleeve, and can reduce one magnetic yoke; in the prior art, one magnetic yoke is used for welding an upper magnetic sleeve, the other magnetic yoke is used for welding a lower magnetic sleeve, and then the two magnetic yokes are in butt joint (the quality problem of butt joint cannot exist). Compared with the prior art, the invention can reduce the working procedures, reduce the cost and improve the product quality.

Referring to fig. 15-16, which illustrate the process of forming a stator assembly 100 with a water jacket according to the present invention based on a stator assembly 102 or by molding an insert, the steps of forming a stator assembly 100 with a water jacket according to the present invention include:

the plastic encapsulated stator assembly 101 shown in fig. 9 is formed by placing the stator assembly 102 shown in fig. 6 into a mold, injecting plastic once, wrapping the coil winding 109, yoke 111 and electronic component 108 with plastic, but exposing the insert 107 and the bobbin central aperture 125 with the upper and lower

magnetic sleeves

113, 114;

the integrated stator assembly 100 with the water blocking sleeve shown in fig. 15 is manufactured by placing the plastic-sealed stator assembly 101 into a mold and injecting plastic for the second time, and injection molding the water blocking sleeve 117 into the middle hole 125 of the coil frame of the plastic-sealed stator assembly 102, which is provided with the upper magnetic conductive sleeve and the lower magnetic conductive sleeve.

Fig. 16 shows a structure of the stator assembly 100 with the water blocking sleeve in which the yoke 111 is tightly fixed to the coil assembly 103 by the molding layer 116, and a part of the water blocking sleeve 117 is injection-molded on the inner walls of the upper and lower magnetic

conductive sleeves

113 and 114 of the bobbin, so that the water blocking sleeve 117 having a thickness of about 0.6mm is injection-molded in the middle hole of the bobbin, that is, the thickness of the water blocking sleeve 117 is reduced by the injection molding process of the present invention. Compared with the water-blocking 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 sleeve, and increase the acting force of electromagnetic force on the movable iron core 201.

In addition, the base 118 of the water barrier with external threads is also injection molded when the plastic is injection molded so that the water barrier stator assembly 100 can be screwed onto the internally threaded valve body 205 when the water inlet solenoid valve is assembled, see FIG. 17.

Fig. 11-14 show the structure of the first embodiment of the upper and lower magnetic sleeves of the present invention, the upper and lower

magnetic sleeves

113 and 114 of the present invention are cylindrical, the cylinder wall is provided with radial through holes 115 for glue passing, and the inner surface is provided with axial magnetic sleeve grooves 122 (for facilitating the flow of hot melt plastic during injection molding), and the magnetic sleeve axial grooves 122 are communicated with the radial through holes 115. By injecting plastic into the middle hole of the coil frame provided with the upper magnetic sleeve and the lower magnetic sleeve, the injection plastic for forming the water blocking sleeve flows into the magnetic sleeve through hole 115 along the upper magnetic sleeve and the lower magnetic sleeve axial groove 122, the root of the water blocking sleeve 117 for positioning injection molding is formed, so that the water blocking sleeve 117 is firmly fixed on the upper magnetic sleeve 113 and the lower magnetic sleeve 114 which are positioned by the magnetic sleeve positioning ring 106.

Fig. 23-26 show the structure of the second embodiment of the upper and lower magnetic sleeves of the present invention, which is different from the first embodiment in that the inner surfaces of the upper and lower

magnetic sleeves

113 and 114 of the second embodiment are further provided with a plurality of radial grooves 122' for further fixing the water blocking sleeve by using the radial grooves when the water blocking sleeve is injection-molded.

In addition, when plastic is injected into the stator assembly 102 once, the connection portion of the yoke 111 connecting the upper and lower

magnetic sleeves

113 and 114 is pressed by a mold, and then plastic is injected into the other portions of the stator assembly 101 except for the insert, so that the plastic-sealed stator assembly 101 shown in fig. 9 and 10 is formed, and only the insert 107 and the middle hole for performing secondary injection molding are exposed.

The material used in the present invention for injecting the stator assembly 102 into the mold at one time is a high flame retardant grade plastic such as flame retardant Polypropylene Plastic (PP) or polyamide Plastic (PA); the plastic encapsulated stator assembly 101 is placed into a mold and the secondary injection plastic is a low flame retardant grade plastic, such as Bulk Molding Compound (BMC). Since the plastic with higher flame retardant rating is more costly, the use of plastic with lower flame retardant rating can reduce the manufacturing cost during the secondary injection molding.

Fig. 19 shows the structure of the water inlet solenoid valve manufactured according to the first embodiment of the present invention, in which the injection molded water blocking sleeve 117 is formed without the top of the water blocking sleeve by injecting plastic secondarily by putting the plastic-sealed stator assembly 101 into a mold, leaving an upper hole identical to the water blocking sleeve 117, thus facilitating the installation of the magnetic conductive seat 121 through the upper hole. The magnetic conduction seat 121 is a cylinder supported by magnetic conduction materials, the welding cover 120 can be made of plastics, the magnetic conduction seat and the welding cover are fixed together, and then the welding cover and the water isolation sleeve are connected together in a welding mode to seal the hole at the top of the water isolation sleeve. In this case, the return spring 200 is mounted in contact with the magnet holder 121.

Fig. 20 shows the structure of a water inlet solenoid valve made in accordance with a second embodiment of the present invention in which a water barrier 117 with a water barrier top 124 is injection molded by placing the plastic encapsulated stator assembly 101 into a mold for a secondary injection of plastic. In this case, the loaded return spring 200 is in contact with the water barrier top 124.

Fig. 21 shows a structure of a stator assembly with a water blocking sleeve manufactured according to a third embodiment of the present invention, which is a stator assembly 100 with a water blocking sleeve formed by one-shot injection molding, comprising the steps of:

the stator assembly 102 is placed in a mold for one shot of plastic injection, wrapping the coil windings, yoke and electronics with plastic, and injection molding a water jacket 117 through the center hole of the bobbin with the upper and lower magnetic sleeves.

Fig. 22 shows a structure of a water inlet solenoid valve manufactured according to a fourth embodiment of the present invention, the steps of the fourth embodiment including:

the plastic-encapsulated stator assembly 101 is formed by placing the stator assembly 102 into a mold and injecting plastic once, wrapping the coil windings, yoke and electronics with plastic, exposing the insert and the bobbin central aperture 125 with the upper and lower magnetic sleeves, see fig. 15;

by placing the plastic-sealed stator assembly 101 and the magnetic conduction seat 121 into a mold for secondary injection of plastic, a water-blocking sleeve 117 fixedly connected with the magnetic conduction seat 121 is injection-molded in a middle hole of a coil frame of the plastic-sealed stator assembly 101, wherein the coil frame is provided with an upper magnetic conduction sleeve and a lower magnetic conduction sleeve, and the water-blocking sleeve is shown in fig. 22. In this case, the loaded return spring 200 contacts the magnetically permeable seat 121.

The fourth embodiment is characterized in that the magnetic base 121 is fixedly connected with the water blocking sleeve 117 by injection molding.

In addition, the invention also provides an integrated water inlet electromagnetic valve realized by the method, and the integrated water inlet electromagnetic valve is shown in fig. 3-17.

In summary, the invention is characterized in that 1) a locating ring is arranged in the middle of the coil frame cylinder; the magnetic conduction inner sleeve is used for positioning the magnetic conduction inner sleeve and also keeps the rigidity strength of the cylinder part; 2) Taking the stator assembly as an insert, placing the insert into a mold, injecting plastic for molding, and wrapping a coil winding, an electronic element, a lead welding part and the like by the injected plastic, wherein the injected plastic needs to achieve certain flame retardant property; the forming process combines the magnetic conduction inner sleeve, the magnetic yoke and the coil rack into a whole, so that the strength of the coil rack and the stator assembly is ensured. 3) Taking a stator assembly of the plastic-packaged coil as an insert, putting the insert into a mould, injecting plastic for molding, and forming a water-proof sleeve by the injected plastic; the water-proof sleeve and the stator component are integrated, so that the wall thickness of the water-proof sleeve can be reduced, the distance between the inner wall of the magnetic conduction 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. 4) The second injected plastic is not in direct contact with the coil windings or the conductive parts, so the second injected plastic can be plastic with low fire resistance level, and the same plastic with low fire resistance level has low cost.

In addition, the invention can also adopt a method of injecting plastics once: the stator assembly is used as an insert,

injection molding of plastic is performed, and the injected plastic not only wraps the coil and the like, but also forms the water-blocking sleeve. The injected plastic needs to achieve certain flame retardant properties.

In addition, more injection molding can be used, and 1 or more parts can be reduced per insert, as long as the main design intent of the invention can be achieved.

On the other hand, the first embodiment 1 of the present invention includes primary injection molding and secondary injection molding. In the secondary injection molding, the top of the water-blocking sleeve is not formed, and a hole is reserved to be communicated with the inner cavity of the water-blocking sleeve, so that the installation of the magnetic conduction seat is facilitated, and in the specific operation, the mold core of the water-blocking sleeve mold is used as a through position, and the through design can effectively ensure the concentricity of the water-blocking sleeve after injection molding and the upper and lower magnetic conduction inner sleeves. The magnetic conduction seat is a cylinder supported by magnetic conduction materials, the welding cover can be made of plastics, the magnetic conduction seat and the welding cover are fixed together, and then the welding cover and the water isolation sleeve are connected together in a welding mode to seal the hole at the top of the water isolation sleeve.

The second embodiment of the present invention directly molds the top of the water blocking sleeve at the time of the second injection molding.

In another aspect, the present invention creates the following technical concepts:

the coil component referred to in the present invention means a component including a coil winding, a bobbin, a tab, an electronic element, and the like.

The stator assembly of the invention is an assembly comprising a coil assembly, an upper magnetic conduction inner sleeve, a magnetic yoke and the like.

The stator assembly of the plastic-packaged coil refers to an assembly formed by packaging windings, welding parts and electronic elements of the coil assembly with plastic on the basis of the stator assembly.

The integrated stator assembly with the water-blocking sleeve refers to an assembly which is formed by combining the water-blocking sleeve and the stator assembly of the plastic-packaged coil into a whole on the basis of the stator assembly of the plastic-packaged coil; the term integrally joined means fixedly connected.

Although the present invention has been described in detail hereinabove, the present invention is not limited thereto and various modifications may be made by those skilled in the art in accordance with the principles of the present invention. Therefore, all modifications made in accordance with the principles of the present invention should be understood as falling within the scope of the present invention.

Claims

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

forming a coil assembly having a cavity by mounting an element comprising a tab on a bobbin around which a coil winding is wound;

the upper magnetic conduction sleeve and the lower magnetic conduction sleeve are arranged in the cavity of the coil assembly to form a coil frame middle hole provided with the upper magnetic conduction sleeve and the lower magnetic conduction sleeve;

the magnetic yoke is respectively connected with the upper magnetic sleeve and the lower magnetic sleeve which are arranged in the cavity of the coil assembly, and the magnetic yoke is fixed on the outer side of the coil assembly to form a stator assembly with a coil winding, the magnetic yoke, an electronic element, the upper magnetic sleeve and the lower magnetic sleeve;

the stator assembly is used as a base for plastic packaging, a water-blocking sleeve is injection-molded in a middle hole of a coil frame provided with an upper magnetic conduction sleeve and a lower magnetic conduction sleeve, and the coil winding, the magnetic yoke and the electronic element are wrapped by plastic, so that an integrated stator assembly with the water-blocking sleeve is manufactured;

and assembling the integrated water inlet electromagnetic valve by assembling the integrated stator assembly with the water blocking sleeve and the valve body assembly together.

2. The method of claim 1, wherein the bobbin has a sleeve retainer within the cavity for retaining the upper and lower sleeves so as to maintain the upper and lower sleeves a predetermined distance from the bobbin cavity.

3. The method according to claim 1 or 2, wherein upper and lower ends of the bobbin are provided with yoke positioning bosses for positioning yokes having yoke positioning grooves, respectively; the magnetic yoke is embedded into the magnetic yoke positioning boss through the magnetic yoke positioning groove.

4. The method of claim 2, wherein the step of molding on a stator assembly basis comprises:

the stator assembly is put into a mould to be injected with plastic, the coil winding, the magnetic yoke and the electronic element are wrapped by the plastic, but the inserting sheet and the middle hole of the coil frame provided with the upper magnetic conduction sleeve and the lower magnetic conduction sleeve are exposed, so that the plastic package stator assembly is formed;

and placing the plastic-packaged stator assembly into a mold, injecting plastic, and injecting a water-blocking sleeve into a middle hole of a coil frame of the plastic-packaged stator assembly to form the integrated stator assembly with the water-blocking sleeve.

5. The method of claim 2, wherein the step of molding on a stator assembly basis comprises:

injecting plastic into the coil frame middle hole of the stator assembly by putting the stator assembly into a mould, and injecting a water-proof sleeve into the coil frame middle hole of the stator assembly;

and (3) plastic is injected again into the stator assembly with the water-blocking sleeve which is injected into the middle hole of the coil frame, so that the integrated stator assembly with the water-blocking sleeve, which wraps the coil winding, the magnetic yoke and the electronic element by plastic, is formed.

6. The method of claim 4 or 5, wherein the upper and lower magnetic sleeves are cylindrical, and the cylinder walls are provided with radial through holes for glue passing.

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

8. The method of claim 6, wherein the root portion of the water blocking sleeve for fixing injection molding is formed by injecting plastic in the holes of the bobbin housing the upper and lower magnetic sleeves, and flowing the injection plastic for forming the water blocking sleeve into the magnetic sleeve through holes along the grooves of the upper and lower magnetic sleeves.

9. The method of claim 4 or 5, wherein the plastic is injected into the stator assembly by pressing a connection portion of the yoke connecting the upper and lower magnetic sleeves with a mold and then injecting the plastic into other portions of the stator assembly except for the insert.

10. The method of claim 8, wherein the material used to inject the plastic to place the stator assembly into the mold is a high flame retardant grade plastic; and placing the plastic package stator assembly into a mold, and injecting plastic into the mold to obtain the plastic with low flame retardant grade.

11. The method of claim 1, wherein the step of molding on a stator assembly basis comprises:

12. A method according to claim 3, wherein the injection molding of the water barrier in the holes in the coil former of the plastic encapsulated stator assembly by placing the plastic encapsulated stator assembly in a mold injects plastic, in particular:

and injecting plastic by putting the plastic package stator assembly into a mold, and injecting the plastic into the water-blocking sleeve with the top of the water-blocking sleeve.

13. The method of claim 1, wherein the step of molding on a stator assembly basis comprises:

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

inserting the upper magnetic sleeve and the lower magnetic sleeve into the cavity of the coil rack to form a coil rack assembly with a middle hole;

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

mounting a magnetic yoke on the stator assembly for plastic packaging to form an integrated plastic packaging stator assembly for plastic packaging a coil winding and the magnetic yoke on the stator assembly;

16. An integrated water inlet solenoid valve comprising:

a coil assembly formed by mounting the coil winding and the tab on the bobbin;

and a valve body assembly assembled with the integrated stator assembly.

17. An integrated water inlet solenoid valve comprising:

and a valve body assembly assembled with the integrated stator assembly.

18. An integrated water inlet solenoid valve comprising:

a valve body assembly assembled with the integrated stator assembly;