CN115126878A

CN115126878A - Water inlet electromagnetic valve and implementation method

Info

Publication number: CN115126878A
Application number: CN202210374536.4A
Authority: CN
Inventors: 王红标; 敖林; 徐飞
Original assignee: Jiangmen Tiandi Electrical Appliance Co ltd
Current assignee: Hanyu Group JSCL
Priority date: 2019-04-30
Filing date: 2019-06-05
Publication date: 2022-09-30

Abstract

The invention discloses a water inlet electromagnetic valve and an implementation method. The implementation method of the water inlet electromagnetic valve comprises the following steps: winding a coil winding with the number of turns D lower than the standard number of turns B of the coil winding on a coil frame, and then assembling the coil frame wound with the number of turns D of the coil winding with other parts of the water inlet electromagnetic valve; by reducing the current flowing through the coil winding of the number of turns D during the start-up of the water inlet solenoid valve, a current is supplied in accordance with the resistance value of the coil winding of the number of turns D, so as to prevent a temperature rise due to a reduction in the resistance value of the coil winding caused by a reduction in the number of turns of the coil winding.

Description

Water inlet electromagnetic valve and implementation method

The invention relates to a divisional application with the application date of 2019, 6 and 5, the application number of 201910485701.1 and the name of 'a water inlet electromagnetic valve and an implementation method'.

Technical Field

The invention relates to the technical field of water inlet electromagnetic valves, in particular to a water inlet electromagnetic valve and an implementation method for reducing the number of turns of a coil winding under the condition of ensuring the normal starting of the water inlet electromagnetic valve.

Background

At present, the water inlet valve is mainly used for washing machines, dish washing machines, coffee machines, ice machines and the like, and has the forms of a single valve, a double valve and a triple valve in structure.

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. The structure is composed of two parts, the upper part is a pilot valve and the lower part is a main valve.

When the winding is not electrified, the movable iron core falls down due to self weight and the counter force of the reset spring, the circulation hole of the main valve plug is closed, so that water entering the upper cavity of the valve plug from the balance hole cannot leak, and because the effective bearing areas of the upper surface and the lower surface of the valve plug diaphragm are different, pressure difference is formed to enable the valve plug diaphragm to be tightly pressed on the valve seat of the main valve, and the valve is closed. When the winding is electrified, the electromagnetic attraction attracts the movable iron core to rise, and water in the cavity on the valve plug is discharged to the outlet of the valve through the flow through hole. Because the circulation capacity of the circulation hole is designed to be far larger than that of the balance hole, the water flow generates enough pressure loss on the balance hole, the pressure in the upper cavity of the valve plug is sharply reduced, and the pressure in the lower cavity of the valve plug is kept 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 upwards expand, the valve is opened, and the water flow is conducted.

One of the main problems of the existing water inlet solenoid valve is that the number of turns of the coil winding for providing the electromagnetic attraction is about 14000 to 16000 turns, and the wire diameter can be as small as 0.06 mm. Due to the process, the minimum wire diameter of the aluminum enameled wire is 0.12mm, and the wire diameter of the copper-clad aluminum wire is 0.1mm, so that under the condition that the volume of the water inlet electromagnetic valve is not changed, the aluminum enameled wire or the copper-clad aluminum wire cannot be used for winding 14000 and 16000 turns, and therefore only the copper enameled wire can be used for winding the coil winding. This results in a water inlet solenoid valve that is not cost effective.

In addition, the weight of 14000-16000 turns of copper wire with the wire diameter of 0.06mm is about 26.5g-28g, so how to reduce the weight of the used copper wire and further reduce the manufacturing cost of the water inlet solenoid valve is also the technical problem to be considered.

Disclosure of Invention

The invention aims to provide a water inlet electromagnetic valve, which is used for solving the technical problems that an aluminum wire cannot be used and a copper wire is too much in the existing water inlet electromagnetic valve.

According to a first aspect of the present invention, there is provided a water inlet solenoid valve, the rated voltage of which is in the range of 200V to 240V, the method comprising:

winding a coil winding with the number of turns D lower than the standard number of turns B of the coil winding on a coil frame, and then assembling the coil frame wound with the number of turns D of the coil winding with other parts of the water inlet electromagnetic valve;

the current flowing through the coil winding with the number of turns D during the starting period of the water inlet electromagnetic valve is reduced, and the current which is suitable for the resistance value of the coil winding with the number of turns D is provided, so that the temperature rise caused by the reduction of the resistance value of the coil winding due to the reduction of the number of turns of the coil winding is prevented;

the coil winding standard turn number B is 14000 turns to 16000 turns required by conventional design, and the number of turns D lower than the coil winding standard turn number B is between 0.54B and 0.65B.

Preferably, the current through the coil winding with the number of turns D is reduced by connecting a current limiting element in series with the supply circuit of the coil winding.

Preferably, the coil rack is provided with a first insertion piece, one end of the first insertion piece is connected with a power supply live wire or a power supply zero wire, one end of the first insertion piece is connected with the power supply zero wire or the live wire, the other end of the first insertion piece is connected with the coil winding, and one end of the third insertion piece is connected with the coil winding; the current limiting element is installed between the other end of the first inserting sheet and the other end of the third inserting sheet.

Preferably, the coil winding wire diameter of the number of turns D is at least 0.01mm smaller than that of the standard number of turns B; the number of turns D is 9000 turns; the coil winding is a copper enameled wire winding.

According to a second aspect of the present invention, there is provided a water inlet solenoid valve, the rated voltage of which is 200V to 240V, the method comprising:

providing a starting voltage suitable for the coil winding with the number of turns D by reducing the starting voltage at two ends of the coil winding; the current flowing through the coil winding with the number of turns D during the starting period of the water inlet electromagnetic valve is reduced, and the driving current adaptive to the resistance value of the coil winding with the number of turns D is provided, so that the temperature rise caused by the reduction of the resistance value of the coil winding due to the reduction of the number of turns of the coil winding is prevented;

the coil winding standard turn number B is 14000 turns to 16000 turns required by conventional design, and the number of turns D lower than the coil winding standard turn number B is between 0.48B and 0.58B.

Preferably, the current flowing through the coil winding with the number of turns D and the starting voltage across the coil winding are reduced by connecting a current limiting element and a voltage dividing element in series with the supply circuit of the coil winding.

Preferably, the coil rack is provided with a first insertion piece, one end of the first insertion piece is connected with a power supply live wire or a power supply zero wire, one end of the first insertion piece is connected with the power supply zero wire or the live wire, the other end of the first insertion piece is connected with the coil winding, and one end of the third insertion piece is connected with the coil winding; and the current limiting element and the voltage dividing element are connected in series and then are installed between the other end of the first inserting piece and the other end of the third inserting piece.

Preferably, the coil winding wire diameter of the number of turns D is the same as that of the standard number of turns B; the number of turns D is 8000 turns; the coil winding is a copper enameled wire winding.

According to a third aspect of the present invention, there is provided a water inlet solenoid valve rated in a voltage range of 200V to 240V, the method comprising:

the starting voltage which is suitable for the resistance value of the coil winding with the number of turns D is provided by reducing the starting voltage at two ends of the coil winding, so that the temperature rise caused by the reduction of the resistance value of the coil winding due to the reduction of the number of turns of the coil winding is prevented;

the coil winding standard turn number B is 14000 turns to 16000 turns required by the conventional design, and the number of turns D lower than the coil winding standard turn number B is between 0.36B and 0.43B or between 0.42B and 0.51B.

Preferably, the starting voltage across the coil winding is reduced by connecting a voltage dividing element in series with the supply circuit of the coil winding.

Preferably, the coil rack is provided with a first insertion piece, one end of the first insertion piece is connected with a power supply live wire or a power supply zero wire, one end of the first insertion piece is connected with the power supply zero wire or the live wire, the other end of the first insertion piece is connected with the coil winding, and one end of the third insertion piece is connected with the coil winding; the voltage division element is installed between the other end of the first inserting sheet and the other end of the third inserting sheet.

Preferably, the coil winding wire diameter of the number of turns D is at least 0.04mm to 0.06mm larger than the coil winding wire diameter of the number of standard turns B; the number of turns D is 6000 and 7000 turns; the coil winding wire is an aluminum enameled wire or a copper-clad aluminum wire winding.

According to a fourth aspect of the present invention, there is provided a water inlet solenoid valve rated in a voltage range of 100V to 127V, the method comprising:

the number of coil winding standard turns B is 6700-7700 required by conventional design, and the number of turns D lower than the number of coil winding standard turns B is between 0.51B and 0.96B.

Preferably, the current flowing through the coil winding with the number of turns D is reduced by connecting a current limiting element in series with a power supply circuit of the coil winding; the number of turns D lower than the standard number of turns B of the coil winding is between 0.51B and 0.64B, and the wire diameter of the coil winding with the number of turns D is at least 0.01mm smaller than that of the coil winding with the standard number of turns B; the coil winding is a copper enameled wire winding.

Preferably, the current flowing through the coil winding with the number of turns D is reduced by connecting a current limiting element in series with a power supply circuit of the coil winding; the number of turns D lower than the standard number of turns B of the coil winding is between 0.56B and 0.72B, and the wire diameter of the coil winding with the number of turns D is at least 0.02mm smaller than that of the coil winding with the standard number of turns B; the coil winding is a copper enameled wire winding.

Preferably, the current flowing through the coil winding with the number of turns D is reduced by connecting a current limiting element in series with a power supply circuit of the coil winding; the number of turns D lower than the standard number of turns B of the coil winding is between 0.75B and 0.96B, and the wire diameter of the coil winding with the number of turns D is at least 0.01mm larger than that of the coil winding with the standard number of turns B; the coil winding is a copper-clad aluminum or aluminum enameled wire winding.

According to the first to fourth aspects, the step of assembling the coil bobbin on which the coil winding is wound by the number D of turns with other components of the water inlet solenoid valve includes:

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;

an upper magnetic conduction inner sleeve and a lower magnetic conduction inner sleeve are installed in a center hole in the coil assembly, and magnetic yokes respectively connected with the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve are fixed on the outer side of the coil assembly to form a stator assembly;

performing plastic package on the stator assembly as a basis to manufacture the stator assembly with the water separating sleeve;

and assembling the stator assembly with the water separating sleeve and the valve body assembly together to complete the assembly of the water inlet electromagnetic valve.

Preferably, a magnetic conduction inner sleeve positioning piece for positioning the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve is arranged in the middle 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 middle hole of the coil frame.

Preferably, the upper and lower end portions of the bobbin are respectively provided with yoke positioning bosses for positioning a yoke having yoke positioning grooves; the magnet yoke is embedded into the magnet yoke positioning boss through the magnet yoke positioning groove of the magnet yoke.

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

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

the plastic package stator assembly is placed into a mold for plastic injection, and the water-isolating sleeve is injected in a middle hole of a coil rack of the plastic package stator assembly, wherein the coil rack is provided with an upper magnetic conductive sleeve and a lower magnetic conductive inner sleeve.

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

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

Preferably, the root portion for fixing the injection-molded water blocking jacket is formed by injecting plastic into a hole in the bobbin in which the upper and lower magnetically permeable inner sleeves are installed, so that the injected plastic for forming the water blocking jacket flows into the radial through hole along the axial groove.

Preferably, when the stator assembly is injected with plastic, the connecting part of the magnetic yoke connecting the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve is pressed by a mold, and then the plastic is injected to the other parts of the stator assembly except the insert.

Preferably, the step of assembling the bobbin on which the coil winding is wound by the number of turns D with other components of the water inlet solenoid valve includes: 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; the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve which are placed together are used as inserts for injection molding to form a waterproof sleeve component; 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.

Preferably, the step of assembling the bobbin on which the coil winding is wound by the number of turns D with other components of the water inlet solenoid valve includes: 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; the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve which are placed together are used as inserts for injection molding to form a waterproof sleeve component; 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 step of assembling the bobbin on which the coil winding is wound by the number of turns D with other components of the water inlet solenoid valve includes: a coil assembly formed by mounting the coil winding and the insert on the bobbin; the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve which are placed together are used as inserts for injection molding to form a waterproof sleeve assembly; mounting a magnet yoke on the coil assembly, inserting a waterproof sleeve assembly with a magnetic sleeve into a cavity of the coil assembly, and performing injection molding and plastic packaging to form an integrated plastic packaging stator assembly for plastically packaging the coil assembly, the magnet yoke and the waterproof sleeve assembly; and assembling the integrated plastic package stator assembly and the valve body assembly together to complete the assembly of the integrated water inlet electromagnetic valve.

According to a fifth aspect of the invention, the invention also provides an integrated water inlet electromagnetic valve realized according to the method.

Compared with the prior art, the invention has the beneficial technical effects that 1) the copper consumption can be saved under the condition of ensuring the normal starting of the water inlet electromagnetic valve; 2) under the condition that the volume of the water inlet electromagnetic valve is not changed, an aluminum wire can be used as a coil winding; 3) the water-isolating sleeve is injection-molded on the inner surfaces of the upper magnetic-conducting inner sleeve, the limiting piece and the lower magnetic-conducting inner sleeve, so that the thickness of the water-isolating sleeve can be greatly reduced, and the acting force of the electromagnetic attraction on the driving movable iron core 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 content, features and technical effects of the present invention.

Drawings

FIG. 1 is a circuit schematic of a winding-series diode of a first embodiment of the present invention;

FIG. 2 is a perspective view of a first embodiment of an insert of the present invention;

fig. 3 is a perspective view of the bobbin of the first embodiment of the present invention;

fig. 4 is a perspective view of the bobbin into which the insert of the first embodiment of the present invention is inserted;

FIG. 5 is a perspective view of a coil assembly of the first embodiment of the present invention;

fig. 6 is a perspective view of a plastic encapsulated coil assembly according to a first embodiment of the present invention;

fig. 7 is a cross-sectional view of a plastic encapsulated coil assembly in accordance with a first embodiment of the present invention;

FIG. 8 is a schematic perspective assembly view of a fill valve according to a first embodiment of the present invention;

FIG. 9 is a perspective view of a fill valve according to a first embodiment of the present invention;

FIG. 10 is a sectional view showing a closed state of the feed valve according to the first embodiment of the present invention, in which a yoke is not shown;

FIG. 11 is a schematic circuit diagram of a winding series resistance of a second embodiment of the present invention;

FIG. 12 is a perspective view of a second embodiment of an insert of the present invention;

fig. 13 is a perspective view of a bobbin of the second embodiment of the present invention;

fig. 14 is a sectional view of the bobbin of the second embodiment of the present invention;

fig. 15 is a perspective view of the bobbin into which the insert of the second embodiment of the present invention is inserted;

fig. 16 is a perspective view of a coil bobbin wound with windings in accordance with a second embodiment of the present invention;

fig. 17 is a perspective assembly view of a coil assembly of a second embodiment of the present invention;

fig. 18 is a perspective view of a coil assembly of a second embodiment of the present invention;

fig. 19 is a perspective view of a plastic encapsulated coil assembly in accordance with a second embodiment of the present invention;

fig. 20 is a cross-sectional view of a plastic encapsulated coil assembly in accordance with a second embodiment of the present invention;

fig. 21 is a perspective view of a plastic encapsulated coil assembly with a water blocking sleeve according to a second embodiment of the present invention;

fig. 22 is a cross-sectional view of a plastic encapsulated coil assembly with a water spacer in accordance with a second embodiment of the present invention;

FIG. 23 is a schematic perspective view of a fill valve according to a second embodiment of the present invention;

FIG. 24 is a perspective view of a fill valve according to a second embodiment of the present invention;

FIG. 25 is a sectional view showing a closed state of the feed valve in accordance with the second embodiment of the present invention;

FIG. 26 is a front elevational view of a magnetically permeable inner sleeve of the second embodiment of the present invention;

FIG. 27 is a cross-sectional view taken along line A-A of the magnetically permeable inner sleeve of the second embodiment of the present invention;

FIG. 28 is a cross-sectional view of the magnetically permeable inner sleeve B-B of the second embodiment of the present invention;

FIG. 29 is a perspective view of a magnetically permeable inner sleeve of a second embodiment of the present invention;

FIG. 30 is a schematic circuit diagram of a winding series resistor and diode of a third embodiment of the present invention;

FIG. 31 is a schematic perspective view of a fill valve according to a fourth embodiment of the present invention;

FIG. 32 is a schematic perspective view of a fill valve according to a fifth embodiment of the invention;

FIG. 33 is a schematic perspective view of a fill valve according to a sixth embodiment of the present invention;

FIG. 34 is a schematic view of a first embodiment of a method of implementing a solenoid feed valve of the present invention;

FIG. 35 is a schematic view of a second embodiment of a method for implementing a solenoid inlet valve of the present invention;

fig. 36 is a schematic diagram of a third embodiment of a method for implementing a solenoid valve for water inlet according to the present invention.

Description of reference numerals: a bobbin-104; a flux sleeve limiter-106; an insert sheet-107; a first tab-107-1; a second tab-107-2; a third insert sheet-107-3; an electronic component-108; coil winding-109; a magnetic yoke positioning boss-110; a yoke-111; a magnet yoke positioning groove-112; an upper magnetically permeable inner sleeve 113; a lower magnetically permeable inner sleeve 114; radial glue-passing holes-115; plastic-sealed layer-116; a water-insulating sleeve-117; a water-insulating jacket base-118; inner cavity-119 of water-proof sleeve; welding a cover-120; an axial inner groove 122; a bond seam 123; a stub weld post 125; a wire tail weld post 126; coil former end face-127; a return spring-200; a movable iron core-201; a rubber flow through hole plug-202; a plastic valve plug-203; a rubber valve plug-204; a valve body 205; a mounting bracket-206; a pressure reducing ring 207; a plastic gasket 208; filter screen assembly-209; flow-through hole-210; a valve plug upper chamber-211; a plug lower cavity-212; balance hole-213; water inlet-215; a water outlet 216; an interface 217.

Detailed Description

The number of turns B of the coil winding of the existing water inlet solenoid valve is a standard number of turns specified for enabling the coil winding to provide electromagnetic attraction, and the standard number of turns B is generally between 14000 turns and 16000 turns, which has become common knowledge or technical specifications. Through the intensive research on the water inlet electromagnetic valve, the inventor finds that the electromagnetic suction force provided by the coil winding with the standard number of turns is actually far greater than the electromagnetic suction force required by opening the water inlet electromagnetic valve; further, it is found that, for a water inlet electromagnetic valve with a rated voltage of 220V, the relationship between the lowest starting voltage of the water inlet electromagnetic valve and the number of turns of the coil winding is shown in table 1 below; when the number of turns of the coil winding is between 15000 turns and 6000 turns, the lowest starting voltage of the water inlet electromagnetic valve is continuously reduced, because the resistance value of the coil winding is reduced after the number of turns of the coil winding is reduced; between 5000 turns and 2000 turns, the lowest starting voltage of the water inlet electromagnetic valve continuously rises, and the heat quantity of the coil after being electrified will rise rapidly, which is an abnormal phenomenon and is not preferable.

Since the standard voltage of the mains frequency alternating current is 220 volts, there is a possibility of realizing a coil winding with fewer turns by lowering the minimum starting voltage on the coil winding. By reducing the number of turns of the coil winding, an aluminum wire with a larger wire diameter can be used under the condition that the volume of the water inlet electromagnetic valve is not changed; the number of turns of the coil winding can be reduced, so that the copper consumption is reduced, and the manufacturing cost is reduced.

TABLE 1

Fig. 31 shows a first technical solution of a method for implementing a water inlet solenoid valve based on the above research of the inventor, wherein the rated voltage of the water inlet solenoid valve is 220V, and the first technical solution comprises:

winding a coil winding 109 with the number of turns D lower than the standard number of turns B of the coil winding on the coil frame 104, and then assembling the coil frame wound with the number of turns D of the coil winding with other parts of the water inlet electromagnetic valve;

providing a current adapted to a resistance value of a coil winding having a number of turns D by reducing a current flowing through the coil winding having the number of turns D during the start-up of the water inlet solenoid valve, so as to prevent a temperature rise due to a reduction in the resistance value of the coil winding due to a reduction in the number of turns of the coil winding;

the coil winding standard turn number B is 14000 turns to 16000 turns required by technical specifications, and the turn number D lower than the coil winding standard turn number B is 0.6B.

On the other hand, considering that the rated voltage of the alternating current used in some countries or regions is higher or lower than 220V, namely, the alternating current with the rated voltage of 200V-240V is used, the first technical proposal is suitable for the number of turns D of 200V-240V rated voltage to be between 0.54B and 0.65B (namely, 0.54B ≦ D ≦ 0.65B).

In the first embodiment of the present invention, a current limiting element (e.g., a diode) is connected in series to the power supply circuit of the coil winding 109, so that the current flowing through the coil winding having the number of turns D is reduced.

In the first technical scheme of the invention, a first plug-in sheet 107-1 with one end connected with a power live wire, a second plug-in sheet 107-2 with one end connected with a power zero wire and the other end connected with a coil winding, and a third plug-in sheet 107-3 with one end connected with the coil winding are arranged on a coil rack 104; the current limiting element is mounted between the other end of the first tab 107-1 and the other end of the third tab 107-3, see fig. 2, 4, 12.

In the first technical scheme of the invention, the wire diameter of the coil winding with the number of turns D is at least 0.01mm lower than that of the coil winding with the standard number of turns B; the number of turns D is 9000 turns; the coil winding is a copper enameled wire winding.

Fig. 32 shows a second technical solution of an implementation method of a water inlet solenoid valve, where the rated voltage of the water inlet solenoid valve is 220V, and the technical solution includes:

winding a coil winding 109 with the number of turns D lower than the standard number of turns B of the coil winding on a coil frame 104, and then assembling the coil frame 104 wound with the coil winding 109 with the number of turns D with other parts of the water inlet electromagnetic valve;

supplying a current adapted to a resistance value of the coil winding 109 having the number of turns D flowing therethrough and a starting voltage across the coil winding by reducing a current flowing through the coil winding having the number of turns D during a start-up of the water inlet solenoid valve and reducing the starting voltage across the coil winding, so as to prevent a temperature rise due to a reduction in the resistance value of the coil winding due to a reduction in the number of turns of the coil winding;

the coil winding standard turn number B is 14000 turns to 16000 turns required by technical specifications, and the turn number D lower than the coil winding standard turn number B is 0.533B.

On the other hand, considering that the rated voltage of the alternating current used in some countries or regions is higher or lower than 220V, namely, the alternating current with the rated voltage of 200V-240V is used, the second technical proposal is suitable for the number of turns D of 200V-240V rated voltage to be between 0.48B and 0.58B (namely, 0.48B ≦ D ≦ 0.58B).

In the second technical scheme of the invention, a current limiting element (such as a diode) and a voltage dividing element (such as a resistor) are connected in series with a power supply circuit of the coil winding, so that the current flowing through the coil winding with the turn number D during the starting period of the water inlet electromagnetic valve is reduced, and the starting voltage at two ends of the coil winding is reduced.

In the second technical scheme of the invention, a first inserting sheet 107-1 with one end connected with a live wire of a power supply, a second inserting sheet 107-2 with one end connected with a zero wire of the power supply and the other end connected with a coil winding and a third inserting sheet with one end connected with the coil winding are arranged on the coil rack; and the current limiting element and the voltage dividing element are connected in series and then are installed between the other end of the first inserting piece and the other end of the third inserting piece.

In the second technical scheme of the invention, the wire diameter of the coil winding with the number of turns D is the same as that of the coil winding with the standard number of turns B; the number of turns D is 8000 turns; the coil winding is a copper enameled wire winding.

Fig. 33 shows a third technical solution of an implementation method of an electromagnetic water inlet valve, where a rated voltage of the electromagnetic water inlet valve is 220V, and the third technical solution includes:

the coil winding standard turn number B is 14000 turns to 16000 turns required by technical specifications, and the turn number D lower than the coil winding standard turn number B is between 0.4B and 0.466B.

On the other hand, considering that the rated voltage of the alternating current used in some countries or regions is higher or lower than 220V, i.e. alternating current with rated voltage of 200V-240V is used, the third technical proposal is suitable for the number of turns D of 200V-240V rated voltage is between 0.36B and 0.43B (corresponding to 0.1mm copper-clad aluminum wire) or between 0.42B and 0.51B (corresponding to 0.12mm aluminum wire).

In the third technical scheme of the invention, a voltage division element is connected in series with a power supply circuit of the coil winding, so that the driving current of the coil winding with the turn number D for driving the water inlet electromagnetic valve to start is reduced, and the starting voltage at two ends of the coil winding is reduced.

In the third technical scheme of the invention, the coil rack 104 is provided with a first plug-in sheet 107-1 of which one end is connected with a power supply live wire or a zero wire, a second plug-in sheet 107-2 of which one end is connected with the power supply zero wire or the live wire and the other end is connected with a coil winding, and a third plug-in sheet 107-3 of which one end is connected with the coil winding; the voltage dividing element is installed between the other end of the first insertion sheet 107-1 and the other end of the third insertion sheet 107-3.

In the third technical scheme of the invention, the diameter of the coil winding wire with the number of turns D is at least 0.04mm to 0.06mm higher than that of the coil winding wire with the number of standard turns B; the number of turns D is 6000 and 7000 turns; the coil winding wire is an aluminum enameled wire or a copper-clad aluminum wire winding.

It should be noted that the current limiting element and/or the voltage dividing element may also be installed in the power supply module or the control board.

The current limiting element is not limited to a diode, and may be any one-way conduction element.

It should be noted that the electromagnetic attraction of the water inlet electromagnetic valve is related to the number of turns of the winding and the current. Under the condition of maintaining the same electromagnetic attraction, the number of turns is reduced, the current is inevitably increased, and the increased current can cause heating problems and even lead the water inlet valve to be burnt. Therefore, the present invention is directed to finding that the electromagnetic attraction of the existing water inlet solenoid valve is much higher than the required electromagnetic attraction, and that reliable start-up of the water inlet solenoid valve can be achieved by reducing the number of turns of the coil winding and by reducing the electromagnetic attraction by reducing the current flowing through the coil winding.

In summary, the first technical solution of the present invention reduces the winding weight by reducing the wire diameter of the winding and reducing the number of winding turns, and the coil winding is connected in series with the diode (see fig. 1). The smaller the wire diameter, the larger the resistance value. The small-wire-diameter winding is used for replacing a large-wire-diameter winding, the number of turns of the winding is greatly reduced, the resistance of the coil winding is greatly reduced, the current is increased, and the temperature rise is increased. Therefore, by connecting the diode in series with the winding, the current is reduced by chopping, and the temperature rise is finally reduced.

It should be noted that the reduction of the number of turns of the coil winding results in the reduction of the resistance value of the coil winding, which results in the increase of the current flowing through the coil winding; therefore, the purpose of serially connecting the diode with the coil winding is to reduce the current in a chopping mode and finally reduce the temperature rise.

If the standard number of turns B is used, it is not necessary to connect diodes in series, because the operating temperature of the coil winding of the standard number of turns B is suitable and there is no need to lower the operating temperature.

The second technical scheme of the invention reduces the weight of the winding by reducing the number of turns of the winding, and the winding is connected with a resistor and a diode in series, and is shown in figure 30. The wire diameter of the copper wire winding is not changed, but the number of turns of the winding is greatly reduced, the using amount of the copper wire is reduced, the resistance of the winding is reduced, the current is increased, and the temperature rise is increased. The voltage at two ends of the winding is reduced through resistance voltage division, the average current passing through the winding is reduced through diode chopping, and finally the temperature rise is reduced. The specific design is as the second configuration scheme.

The third technical solution of the present invention uses an aluminum wire winding with a larger wire diameter and fewer turns, and the winding is connected with a resistor in series, see fig. 11. Under the same length, the impedance of a 0.06mm copper wire is equivalent to that of a 0.07mm aluminum wire, but the minimum manufacturing process of the aluminum wire at present can only reach 0.12mm, so the aluminum wire with a larger wire diameter is used for replacing the copper wire, the impedance of a winding is reduced, the current is increased, and the temperature rise is increased. The resistor is connected with the winding in series, the current is reduced through a voltage division mode, and finally the temperature rise is reduced.

Table 2 shows the best examples of the diode, the resistor, the type of the enameled wire and the number of turns using the above three solutions when the rated voltage is 220V, and it should be noted that those skilled in the art can change the values in table 2 more or less according to the actual situation.

TABLE 2

	Diode with a high-voltage source	Resistance (RC)	Type of enameled wire	Number of turns	Weight of winding
						Prior art solutions	Is free of	Is free of	0.06mm copper wire	15000	26.5-28g
Scheme one of the invention	Is provided with	Is free of	0.05mm copper wire	9000	8.1g
						Scheme two of the invention	Is provided with	1000Ω	0.06mm copper wire	8000	9.7g
Scheme three of the invention	Is free of	2000Ω	0.1mm copper-clad aluminum wire	6000	10g
						III 'of scheme of the invention'	Is free of	2000Ω	0.12mm aluminum wire	7000	15g

On the other hand, the inventor also finds that the lowest starting voltage is about 96V and the temperature rise is within 110K for the water inlet electromagnetic valve with the rated voltage of 110V. Therefore, the weight of the winding can be reduced by reducing the wire diameter of the winding and reducing the number of turns of the winding, and the winding is connected with the diode in series.

Therefore, for the water inlet electromagnetic valve with the rated voltage of 110V, the implementation method of the water inlet electromagnetic valve further comprises the following fourth to sixth technical schemes.

In the fourth to sixth technical solutions of the present invention, firstly, a coil winding with a number of turns D lower than the standard number of turns B of the coil winding is wound on a bobbin, and then the bobbin wound with the number of turns D of the coil winding is assembled with other components of the water inlet solenoid valve; by reducing the current flowing through the coil winding with the number of turns D during the startup of the water inlet solenoid valve, the current is supplied in accordance with the resistance value of the coil winding with the number of turns D, so as to prevent the temperature rise caused by the reduction of the resistance value of the coil winding due to the reduction of the number of turns of the coil winding.

And according to the circuit shown in fig. 1, a current limiting element can be connected in series with the power supply circuit of the coil winding to reduce the current flowing through the coil winding with the number of turns D. In a specific implementation, according to the mode shown in fig. 2, the coil frame is provided with a first insertion sheet, one end of which is connected with the live wire or the neutral wire of the power supply, one end of which is connected with the zero wire or the live wire of the power supply, and the other end of which is connected with the second insertion sheet of the coil winding, and one end of which is connected with the third insertion sheet of the coil winding; the current limiting element is installed between the other end of the first inserting sheet and the other end of the third inserting sheet.

For the fourth technical scheme, the standard turn number B of the coil winding is 6700 turns-7700 turns required by the conventional design, and the turn number D lower than the standard turn number B of the coil winding is 0.56B. The wire diameter of the coil winding with the number of turns D is at least 0.01mm smaller than that of the coil winding with the standard number of turns B; the number of turns D is 4000 turns; the coil winding is a copper enameled wire winding.

On the other hand, considering that the rated voltage of the alternating current used in some countries or regions is higher or lower than 110V, namely alternating current with the rated voltage of 100V-127V is used, the fourth technical proposal is suitable for the number of turns D of the rated voltage of 100V-127V between 0.51B and 0.64B (namely, 0.51B ≦ D ≦ 0.64B).

For the fifth technical scheme, the standard turn number B of the coil winding is 6700 turns-7700 turns required by the conventional design, and the turn number D lower than the standard turn number B of the coil winding is 0.63B. The wire diameter of the coil winding with the number of turns D is at least 0.02mm smaller than that of the coil winding with the standard number of turns B; the number of turns D is 4500 turns; the coil winding is a copper enameled wire winding.

On the other hand, considering that the rated voltage of the alternating current used in some countries or regions is higher or lower than 110V, i.e. alternating current with rated voltage of 100V-127V is used, the fifth technical proposal is suitable for the number of turns D of 100V-127V rated voltage between 0.56B and 0.72B (i.e. 0.56B ≦ D ≦ 0.72B).

For the sixth technical scheme, the standard turn number B of the coil winding is 6700 turns-7700 turns required by the conventional design, and the turn number D lower than the standard turn number B of the coil winding is 0.83B. The coil winding is a copper-clad aluminum or aluminum enameled wire winding, and the wire diameter of the coil winding with the number of turns D is at least 0.01mm larger than that of the coil winding with the standard number of turns B; the number of turns D is 6012 turns.

On the other hand, considering that the rated voltage of the alternating current used in some countries or regions is higher or lower than 110V, namely, the alternating current with the rated voltage of 100V-127V is used, the sixth technical proposal is suitable for the number of turns D of the rated voltage of 100V-127V is between 0.75B and 0.96B (namely, 075B D is less than or equal to 0.96B).

The specific design of the water inlet solenoid valve with the rated voltage of 110V is shown in the following table 3.

TABLE 3

In addition, the invention can also improve the acting force of the electromagnetic attraction generated by the coil winding on the movable iron core by improving the manufacturing method of the water inlet electromagnetic valve, because the starting of the water inlet electromagnetic valve is actually realized by the acting force of the electromagnetic attraction generated by the coil winding on the movable iron core.

In the first to sixth aspects, the step of assembling the bobbin 104 on which the coil winding 109 having the number of turns D is wound and the other components of the water inlet solenoid valve includes:

a coil assembly having a central hole is formed by mounting elements including tabs and electronic elements (e.g., diodes and/or resistors) on the bobbin 104 around which the coil windings are wound, see fig. 13-16;

an upper flux sleeve 113 and a lower flux sleeve 114 are installed in a middle hole of the coil assembly, and a magnetic yoke 111 respectively connected with the upper flux sleeve 113 and the lower flux sleeve 114 is fixed on the outer side of the coil assembly to form a stator assembly, which is shown in fig. 17-18;

performing plastic packaging on the stator assembly as a basis to manufacture the stator assembly with the water separating sleeve 117, and referring to fig. 19-22;

the assembly of the water inlet solenoid valve is completed by assembling the stator assembly with the water blocking sleeve 117 and the valve body assembly together, see fig. 23-25.

Referring to fig. 23, 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 hole of the stator assembly 100 with a water separating sleeve; a rubber flow-through hole plug 202; a valve plug 203; a valve plug rubber 204; the water inlet electromagnetic valve comprises a valve body 205, a mounting bracket 207, a pressure reducing ring 207, a rubber gasket 208, a filter screen assembly 209 and the like, wherein the components 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.

In addition, the water inlet solenoid valve of the present invention may further include a welding cap 120 fitted into an upper end of the central hole of the stator assembly 100 with the water blocking sleeve.

Fig. 13 to 16 show a specific process of forming a coil assembly having a central hole according to the present invention, in which a bobbin 104 having a central hole is first manufactured, and yoke-positioning bosses 110 for positioning yokes are respectively formed on both end surfaces of the bobbin, see fig. 13. The invention makes it possible to further reduce the wall thickness of the cylindrical part of the coil former to 0.6 mm. In the central hole of the coil frame 104, a flux sleeve positioning member 106, such as a positioning ring or a positioning rib, is installed to position the upper flux sleeve 113 and the lower flux sleeve 114, so as to maintain a predetermined distance between the upper flux sleeve 113 and the lower flux sleeve 114 in the central hole of the coil frame 104, as shown in fig. 4. Then, the inserting sheet 107 is installed on the upper end face of the coil former 104, see fig. 15; the coil windings 109 and the welding electronics 108 are wound to form the coil assembly shown in fig. 16. 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.

Fig. 17-18 illustrate the process of forming a stator assembly of the present invention, wherein the upper flux sleeve 113 and the lower flux sleeve 114 are mounted to the central opening of the coil assembly, and the upper flux sleeve 113 and the lower flux sleeve 114 are retained in position to contact the yoke 111 by the flux sleeve retaining ring 106 in the central opening of the bobbin 104; then, the yoke positioning groove 112 of the yoke 111 is engaged with the yoke positioning bosses 110 on the upper and lower end surfaces of the bobbin 104, so that the yoke 111 is positioned on the bobbin 104 on one hand, and is in close contact with the upper flux sleeve 113 and the lower flux sleeve 114 to form electrical connection, thereby forming the stator assembly shown in fig. 18.

Fig. 21-22 show the process of the stator assembly with the water-proof sleeve of the present invention, and the steps of the present invention for plastic-molding the stator assembly with the water-proof sleeve based on the stator assembly or by an insert include:

the plastic-encapsulated stator assembly shown in fig. 9 is formed by placing the stator assembly shown in fig. 19 into a mold and injecting plastic once, wrapping the coil winding 109, the magnetic yoke 111 and the electronic component 108 with the plastic, but exposing the insert sheet 107 and the central hole of the coil frame provided with the upper magnetic sleeve 113 and the lower magnetic sleeve 114;

the stator assembly with the water-proof sleeve shown in fig. 20 is manufactured by placing the plastic-sealed stator assembly 101 into a mold and performing secondary plastic injection, and then injecting the water-proof sleeve 117 into the hole in the coil rack of the plastic-sealed stator assembly 102, which is provided with the upper magnetic conductive sleeve and the lower magnetic conductive sleeve.

Fig. 22 shows the structure of the stator assembly 100 with the water blocking jacket, in which the yoke 111 is tightly fixed to the coil assembly 103 by the molding layer 116, and a portion of the water blocking jacket 117 is injection-molded on the inner walls of the upper and

lower flux sleeves

113 and 114 of the bobbin, so that the water blocking jacket 117 having a thickness of about 0.6mm is injection-molded in the hole of the bobbin, that is, the thickness of the water blocking jacket 117 is reduced by the injection molding process of the present invention. Compared with the water-resisting 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 sleeve and increase the acting force of electromagnetic force on the movable iron core 201, so that the invention is beneficial to reducing the electromagnetic attraction generated by the coil winding, and is beneficial to reducing the number of turns of the coil winding.

In addition, during the secondary injection molding of plastic, a base 118 (see fig. 21) of the water-blocking sleeve with external threads is also injected, so that the stator assembly 100 with the water-blocking sleeve can be screwed to the valve body 205 with internal threads when the water inlet solenoid valve is assembled.

Fig. 26 to 29 show the structure of the upper flux sleeve and the lower flux sleeve of the present invention, in which the upper flux sleeve 113 and the lower flux sleeve 114 of the present invention are cylindrical, and the cylinder wall is provided with a water-stop sleeve attachment structure for attaching the injection-molded water-stop sleeve to the inner surfaces of the upper flux sleeve 113 and the lower flux sleeve 114. The attachment structure includes: radial through holes 115 for the passage of the glue, axial grooves 122 provided on the inner surface (for facilitating the flow of the hot-melt plastic during injection molding). The axial groove 122 communicates with the radial through hole 115. By injecting plastic into the holes in the coil frame in which the upper and lower flux sleeves are mounted, the injected plastic for forming the water partition sleeve flows into the flux sleeve through hole 115 along the grooves 122 of the upper and lower flux sleeves, forming the root portion for positioning the injection-molded waterproof sleeve 117, so that the water partition sleeve 117 is firmly fixed to the upper and

lower flux sleeves

113 and 114 that have been positioned by the flux sleeve positioning ring 106. The cylindrical upper flux sleeve and lower flux sleeve are both rolled from a flat material, and thus have flux sleeve joint seams 123 shown in fig. 28. The attachment structure may further include: a circumferential groove (not shown) provided in the inner surface.

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 figures 23-25.

The following describes the manufacturing process of the water inlet solenoid valve according to the present invention by using three embodiments of the water inlet solenoid valve, and it should be noted that the following embodiments are only examples and are not intended to limit the present invention.

Example 1:

this embodiment reduces the amount of copper wire compared to the prior art, and the coil winding is connected in series with a diode (as shown in fig. 1). As shown in fig. 5 and 6, the coil assembly includes a coil winding 109, a coil former 104, tabs 107-1, tabs 107-2, tabs 107-3, and electronic components (e.g., diodes) 108. As shown in fig. 3, the coil frame is a cylindrical plastic member with an end face at one end. The winding is wound on the cylinder of the coil frame, and the head end and the tail end of the outgoing line are respectively formed at the two ends of the winding. As shown in fig. 2 to 4, the insertion sheet 107-1, the insertion sheet 107-2 and the insertion sheet 107-3 are inserted into the end face of the coil frame in an insulated manner. The plug-in sheets 107-1 and 107-3 are used for being connected with a power supply and are arranged in parallel, and the length of the plug-in sheet 107-1 is larger than that of the plug-in sheet 107-3. The insert sheet 107-2 is arranged at the back of the insert sheet 107-3 in the same direction. The inserting piece 107-2 is provided with a wire tail welding column which is connected with the tail end of the outgoing wire of the winding. The inserting sheet 107-3 is provided with a wire end welding column which is connected with the head end of the outgoing wire of the winding 109. The ends of the insert 107-1 and the insert 107-2 are provided with terminals, and the diode is bridged on the terminals and fixed by soldering. As shown in fig. 6, the coil assembly is encapsulated with an insulating material to form an encapsulation cover of the coil assembly, and only the connection ends in front of the blades 107-1 and 107-3 for power connection are exposed.

It should be noted that when the coil winding is connected in series with the diode D, a freewheeling diode (not shown in fig. 1) should be connected in parallel across the coil winding.

As shown in fig. 8, the upper and lower magnetically conductive

inner sleeves

113 and 114 are assembled with an L-shaped iron frame, respectively, and are installed at two ends of the cylinder of the coil frame; the two L-shaped iron frames are snap-connected at their ends and fixed on the plastic envelope 116 of the coil assembly 109 to form a magnetic yoke 111.

As shown in fig. 8 and 10, the inlet valve body assembly of the present embodiment comprises a return spring 200 and a movable iron core 201 installed in the water compartment 117; a rubber flow-through hole plug 202; a plastic valve plug 203 with a flow orifice 210; a rubber valve plug 204; a valve body 205; a mounting bracket 206; a pressure reducing ring 207; a rubber gasket 208; a screen assembly 209.

The valve body 205 comprises a water inlet 215, a water outlet 216 and a joint 217, the inside of which is provided with threads.

The upper end of the valve body 205 is provided with a rubber valve plug 204, a plastic valve plug-203 and a rubber flow hole plug 202 in sequence. The movable core 201 is located between the return spring 200 and the rubber flow hole plug 202.

The mounting bracket 206, the pressure reducing ring 207, the rubber gasket 208 and the filter screen assembly 209 are sequentially mounted on the water inlet side of the valve body 205.

The upper chamber of the water-blocking sleeve 117 is cylindrical and is mounted in the coil rack cylinder; the outer side of the lower cavity of the water separating sleeve is provided with threads which are in threaded connection with the valve body joint 217. The upper cavity of the water-separating sleeve is provided with a movable iron core and a return spring positioned above the movable iron core, and a rubber through hole plug is arranged below the movable iron core. The water separating sleeve and the plastic valve plug surround to form a valve plug upper cavity, a circulation hole is arranged in the plastic valve plug, and the valve plug upper cavity is communicated with the water outlet. The rubber valve plug 204 is provided with a balance hole 213 for communicating the upper cavity of the valve plug with the water inlet. The return spring 200 has a certain precompression, and when the valve is not energized, the movable iron core falls down due to the self-weight and the spring force to drive the rubber circulation hole plug to seal the circulation hole.

As shown in fig. 1-5, after the plug-in sheet 107-1 and the plug-in sheet 107-3 are connected to an ac power supply, a current from the ac power supply enters from the plug-in sheet 107-1, passes through a diode to reach the plug-in sheet 107-2, then enters into a winding through a tail welding column 126 and a tail end of a winding outgoing line, flows out through a head end of the winding outgoing line and a head welding column 125, and reaches the other end of the ac power supply through the plug-in sheet 107-3. A freewheeling diode (not shown) may be bonded between the lead bonding post 125 and the tail bonding post 126.

As shown in fig. 10, the current generates a magnetic field in the winding to drive the movable iron core to compress the return spring upwards, so that the rubber through-hole plug moves upwards, the through-hole is opened, the water source pressure drops in front of the balance hole, the rubber valve plug presses upwards, the plastic valve plug is driven to rise to open the valve, the water inlet and the water outlet are communicated, and the electromagnetic valve is opened. After the power is cut off, the magnetic field generated by the winding disappears, the reset spring extends to push the rubber circulation hole plug to move downwards, the circulation hole is closed, the water source pressure passes through the balance hole to press the rubber valve plug and the plastic valve plug to reset, the water inlet and the water outlet are enabled to flow discontinuously, and the water inlet valve is closed.

Example 2:

compared with the prior art, the copper-clad aluminum wire or the aluminum wire with larger wire diameter is used for replacing the copper wire, and the winding is connected with the resistor in series. As shown in fig. 11-29, the coil assembly includes a winding 109, a coil former 104, a magnetic yoke 111, an upper magnetic conductive inner 113 sleeve, a lower magnetic conductive inner sleeve 114, an insert sheet 107-1, an insert sheet 107-2, an insert sheet 107-3, and a resistor. As shown in fig. 13, the coil frame is a cylindrical plastic member, one end of which is provided with an end face, and the end face is provided with a positioning boss 110; as shown in fig. 14, a flux sleeve retaining ring 106 is provided at an intermediate position within the bobbin cylinder, the diameter of the retaining ring being slightly smaller than the diameter of the bobbin cylinder. As shown in fig. 16, the winding is wound on the bobbin cylinder, and the two ends of the winding form the head end and the tail end of the leading wire respectively. As shown in fig. 12 to 15, the insertion piece 107-1, the insertion piece 107-2 and the insertion piece 107-3 are inserted into the end face of the coil bobbin in an insulated manner. The plug-in sheets 107-1 and 107-3 are used for being connected with a power supply and are arranged in parallel, and the length of the plug-in sheet 107-1 is larger than that of the plug-in sheet 107-3. The insert 107-2 is arranged at the rear of the insert 107-3 in the same direction. The inserting piece 107-2 is provided with a wire tail welding column which is connected with the tail end of the outgoing wire of the winding. The inserting sheet 107-3 is provided with a wire end welding column which is connected with the head end of the outgoing wire of the winding.

As shown in fig. 11, 17 and 18, the electronic component 108 is a resistor R, and terminals are disposed at the ends of the blades 1 and 107-2 and connected through the resistor R. The magnetic yoke is designed into a \ 21274 \ shaped iron frame, the upper end surface and the lower end surface of the magnetic yoke are provided with a positioning groove and a through hole, the magnetic yoke positioning groove 112 is connected with the end surface positioning boss of the coil frame in a clamping way, and the through hole is aligned with the center of the cylinder of the coil frame. The upper and lower magnetic conduction inner sleeves respectively pass through the upper and lower through holes in interference fit and are arranged at two ends in the coil frame cylinder.

As shown in fig. 19, the coil assembly is encapsulated by an insulating material to form an encapsulation cover of the coil assembly, and the connection ends in front of the insertion pieces 107-1 and 107-3 for power connection and the inner walls of the upper and lower magnetic conductive inner sleeves are exposed.

Referring to fig. 23, the water inlet valve of the present embodiment includes a valve body 205, a plastic valve plug 203, a rubber valve plug 204, a movable iron core 201, a plastic-encapsulated coil assembly 101-2 with a magnetic yoke, and a welding cover 120, wherein the plastic-encapsulated coil assembly 101-2 with a magnetic yoke includes a water-proof sleeve 117, a coil assembly 109, and the like (see fig. 22). The valve body 205 comprises a water inlet 215, a water outlet 216 and a joint 217, which is provided with threads on the inside. Referring to fig. 21 and 22, the waterproof sleeve is formed by secondary injection molding on the basis of the plastic-sealed coil assembly, and an upper magnetic inner sleeve and a lower magnetic inner sleeve are covered in the coil rack cylinder to form an upper cavity; the top of the water-proof sleeve is not subjected to injection molding, a hole is left to be communicated with the upper cavity, and a welding cover made of plastics is welded with the water-proof sleeve to seal the hole in the top of the water-proof sleeve; the outer side of the lower cavity of the water-resisting sleeve is provided with threads which are connected with the valve body connector threads. As shown in fig. 23, a movable iron core and a return spring located above the movable iron core are arranged in an upper cavity of the water-separating sleeve, and a rubber through hole plug is arranged below the movable iron core. As shown in fig. 25, the water-separating sleeve and the plastic valve plug surround to form a valve plug upper cavity, and a circulation hole is arranged in the plastic valve plug to communicate the valve plug upper cavity with the water outlet. The rubber valve plug is equipped with the balancing hole, intercommunication valve plug epicoele and water inlet. The reset spring has certain precompression, and when the valve is not electrified, the movable iron core falls down due to dead weight and spring force to drive the rubber circulation hole plug to seal the circulation hole.

As shown in fig. 18, after the plug-in sheet 107-1 and the plug-in sheet 107-3 are connected to an ac power supply, a current from one end of the ac power supply enters from the plug-in sheet 107-1, reaches the plug-in sheet 107-2 through an electronic component (such as a resistor), enters the winding through the tail welding column and the tail end of the outgoing line of the winding, flows out through the head end and the head welding column of the outgoing line of the winding, and reaches the other end of the ac power supply through the plug-in sheet 107-3. As shown in fig. 25, the current generates a magnetic field in the winding to drive the movable iron core to compress the return spring upwards, so that the rubber through-hole plug moves upwards, the through-hole is opened, the water source pressure drops in front of the balance hole, the rubber valve plug presses upwards, the plastic valve plug is driven to rise to open the valve, the water inlet and the water outlet are communicated, and the electromagnetic valve is opened. After the power is cut off, the magnetic field generated by the winding disappears, the reset spring extends to push the rubber circulation hole plug to move downwards, the circulation hole is closed, the water source pressure passes through the balance hole to press the rubber valve plug and the plastic valve plug to reset, the water inlet and the water outlet are enabled to flow discontinuously, and the water inlet valve is closed.

Embodiment 3 differs from embodiment 2 in that its electronic components 108 are a diode D and a resistor R connected in series as shown in fig. 30.

Alternatively, as shown in fig. 31, the step of assembling the bobbin on which the coil winding having the number of turns D is wound with other components of the water inlet solenoid valve according to the present invention includes: mounting a magnetic yoke on the coil assembly and then carrying out plastic packaging to form a plastic-packaged coil assembly 400 with the magnetic yoke; the upper magnetic conduction inner sleeve 113, the limiting piece 106 and the lower magnetic conduction inner sleeve 114 which are placed together are used as inserts for injection molding to form an independent waterproof sleeve assembly 300; the plastic package coil assembly 400 with the magnet yoke, the water-resisting sleeve assembly 300 and the valve body assembly are assembled together, and the integrated water inlet electromagnetic valve is assembled.

Alternatively, as shown in fig. 32, the step of assembling the bobbin on which the coil winding of the number D of turns is wound with other components of the water inlet solenoid valve according to the present invention includes: the insert is mounted on the coil frame wound with the coil winding and then plastic-packaged to form a plastic-packaged coil assembly 500 without a magnetic yoke; the upper magnetic conduction inner sleeve 113, the limiting piece 106 and the lower magnetic conduction inner sleeve 114 which are placed together are used as inserts for injection molding to form an independent waterproof sleeve assembly 300; and assembling 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 together to finish the assembly of the integrated water inlet electromagnetic valve.

For the limiter 106, there are the following variations: the magnetically permeable inner sleeve positioning ring 106 is formed during injection molding by providing a positioning structure, such as a step or rib, in the mold cavity to space the upper magnetically permeable inner sleeve 113 and the lower magnetically permeable inner sleeve 114 at the desired location in the mold cavity.

Alternatively, as shown in fig. 33, the step of assembling the bobbin on which the coil winding of the number D of turns is wound with other components of the water inlet solenoid valve according to the present invention includes: a coil assembly formed by mounting the coil winding and the insert on the bobbin; the water separating sleeve is injection-molded by taking the upper magnetic sleeve 113 and the lower magnetic sleeve 114 as inserts or bases to form a magnetic sleeve water separating sleeve component; mounting a yoke to the coil assembly; inserting the waterproof sleeve assembly with the magnetic sleeve into the cavity of the coil assembly, and carrying out injection molding and plastic packaging; an integrated plastic package stator assembly 100 for plastic packaging the coil assembly, the magnetic yoke and the waterproof sleeve assembly is formed;

the assembly of the integrated water inlet solenoid valve is completed by assembling the integrated stator assembly 100 and the valve body assembly together. Wherein, the outer side of the lower cavity of the integrated stator assembly 100 is provided with threads 118 which are in threaded connection with the valve seat and the valve body joint of the main valve.

In conclusion, the invention can save copper consumption under the condition of ensuring the normal starting of the water inlet electromagnetic valve; under the condition that the volume of the water inlet electromagnetic valve is not changed, an aluminum wire can be used as a coil winding; and through moulding plastics in stator module and separating the water jacket, can significantly reduce the thickness of separating the water jacket to the effort of electromagnetic suction to drive movable core has been improved.

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. A method for realizing a water inlet electromagnetic valve with a rated voltage range of 200V to 240V comprises the following steps:

2. The method of claim 1, wherein the current through the coil winding having the number of turns D is reduced by connecting a current limiting element in series with a power supply circuit of the coil winding.

3. The method according to claim 2, wherein the bobbin is provided with a first insertion piece having one end connected to the power supply line or neutral, a second insertion piece having one end connected to the power supply line or neutral and the other end connected to the coil winding, and a third insertion piece having one end connected to the coil winding; the current limiting element is installed between the other end of the first inserting sheet and the other end of the third inserting sheet.

4. The method of claim 1, wherein the coil winding wire diameter of the number of turns D is at least 0.01mm smaller than the coil winding wire diameter of the number of standard turns B; the number of turns D is 9000 turns; the coil winding is a copper enameled wire winding.

5. A method for realizing a water inlet electromagnetic valve, wherein the rated voltage range of the water inlet electromagnetic valve is 100V-127V, and the method comprises the following steps:

winding a coil winding with the number of turns D lower than the standard number of turns B of the coil winding on a coil frame, and then assembling the coil frame wound with the coil winding with the number of turns D with other parts of the water inlet electromagnetic valve;

the coil winding standard turn number B is 6700 turns-7700 turns required by conventional design, and the number of turns D lower than the coil winding standard turn number B is between 0.51B and 0.96B.

6. The method of claim 5, wherein the current through the coil winding for the number of turns D is reduced by connecting a current limiting element in series with the power supply circuit of the coil winding;

the number of turns D lower than the standard number of turns B of the coil winding is between 0.51B and 0.64B, and the wire diameter of the coil winding with the number of turns D is at least 0.01mm smaller than that of the coil winding with the standard number of turns B; the coil winding is a copper enameled wire winding.

7. The method of claim 5, wherein the current through the coil winding with the number of turns D is reduced by connecting a current limiting element in series with the power supply circuit of the coil winding;

the number of turns D lower than the standard number of turns B of the coil winding is between 0.56B and 0.72B, and the wire diameter of the coil winding with the number of turns D is at least 0.02mm smaller than that of the coil winding with the standard number of turns B of the coil winding; the coil winding is a copper enameled wire winding.

8. The method of claim 5, wherein the current through the coil winding with the number of turns D is reduced by connecting a current limiting element in series with the power supply circuit of the coil winding;

the number of turns D which are lower than the standard number of turns B of the coil winding is between 0.75B and 0.96B, and the wire diameter of the coil winding with the number of turns D is at least 0.01mm larger than that of the coil winding with the standard number of turns B; the coil winding is a copper-clad aluminum or aluminum enameled wire winding.

9. A method according to claim 6 or 7 or 8, wherein the coil former is provided with a first tab connected at one end to the mains or neutral line, a second tab connected at one end to the mains or live line and at the other end to the coil winding, and a third tab connected at one end to the coil winding; the current limiting element is installed between the other end of the first inserting sheet and the other end of the third inserting sheet.

10. The method according to any one of claims 1 to 9, wherein the step of assembling the bobbin on which the number D of turns of the coil winding are wound with other components of the water inlet solenoid valve comprises:

the stator component is formed by installing an upper magnetic conduction inner sleeve and a lower magnetic conduction inner sleeve in a central hole of the coil component and fixing a magnetic yoke connecting the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve on the coil component;

11. The method according to any one of claims 1 to 9, wherein the step of assembling the bobbin on which the number D of turns of the coil winding are wound with other components of the water inlet solenoid valve comprises:

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;

the upper magnetic conduction inner sleeve and the lower magnetic conduction inner sleeve which are placed together are used as inserts for injection molding to form a waterproof sleeve component;

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

12. The method according to any one of claims 1 to 9, wherein the step of assembling the bobbin on which the number D of turns of the coil winding are wound with other components of the water inlet solenoid valve comprises:

the coil frame wound with the coil winding is provided with the inserting sheet and then is subjected to plastic packaging to form a plastic packaging 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.

13. The method as claimed in any one of claims 1 to 9, wherein the step of assembling the bobbin on which the coil winding is wound by the number of turns D with other components of the water inlet solenoid valve comprises:

forming a coil assembly by mounting the coil winding and the insert on a coil former;

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

mounting a magnet yoke on the coil assembly, inserting a waterproof sleeve assembly with a magnetic sleeve into a cavity of the coil assembly, and performing injection molding and plastic packaging to form an integrated plastic packaging stator assembly for plastically packaging the coil assembly, the magnet yoke and the waterproof sleeve assembly;

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

14. An integrated water inlet solenoid valve implemented according to the method of any one of claims 1 to 13.