CN111022741A

CN111022741A - Solenoid valve coil assembly

Info

Publication number: CN111022741A
Application number: CN201911053697.8A
Authority: CN
Inventors: 王红标; 敖林; 徐飞
Original assignee: Jiangmen Tiande Electrical Appliance Co ltd
Current assignee: Hanyu Group JSCL
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-04-17
Anticipated expiration: 2039-06-05
Also published as: CN111022741B

Abstract

The present invention provides a solenoid valve coil assembly comprising: a bobbin around which a coil is wound; the coil rack is arranged on the end face of the coil rack, one end of the coil rack is connected with a first insertion piece of a power live wire, one end of the coil rack is connected with a power zero wire, the other end of the coil rack is connected with a second insertion piece of a coil, and one end of the coil rack is connected with a third insertion piece of the coil; and the current limiting element is arranged between the other end of the first inserting sheet and the other end of the third inserting sheet. The invention can effectively meet the design requirement of the electric connection of the coil and the current-limiting element, improve the acting force of the magnetomotive force driving movable iron core, simplify the production process of manufacturing the electromagnetic valve and reduce the production cost.

Description

Solenoid valve coil assembly

Technical Field

The invention relates to the technical field of manufacturing of water inlet electromagnetic valves, and belongs to the IPC classification of F16K 31/02.

Background

The application is a divisional application of CN 201910485701.1. In the structure of the conventional solenoid valve coil assembly, as shown in fig. 2 to 11 of the specification of chinese patent CN201149123Y, a groove is formed on the end face side of the frame, thereby solving the problem that the connection terminal is inserted and formed in the frame. However, the structure can not meet the design requirement of the electrical connection of the coil and the current-limiting element, and according to the content of the application specification of the parent application, the novel coil can meet the design requirement, the technical problems that the existing water inlet electromagnetic valve cannot use an aluminum wire and uses too many copper wires can be solved, and the product cost is reduced.

Disclosure of Invention

The invention provides a solenoid valve coil assembly which can effectively meet the design requirement of electric connection of a coil and a current-limiting element, improve the acting force of a magnetomotive force driving movable iron core, simplify the production process of manufacturing a solenoid valve and reduce the production cost.

A solenoid coil assembly comprising: the coil frame is wound with a coil, and the first inserting piece, the second inserting piece, the third inserting piece and the current limiting element are arranged on the end face of the coil frame; one end of the first plug-in strip is used for being connected to one pole of a single-phase power supply; one end of the second plug-in sheet is used for connecting to the other pole of the single-phase power supply, and two winding ends of the coil are in bridge connection with the other end of the second plug-in sheet and the connecting end of the third plug-in sheet; and the other end of the first insert sheet is connected with the connecting end of the third insert sheet in a bridging manner by two terminals of the current limiting element.

As one specific embodiment, preferably, the solenoid valve coil assembly further includes a plastic casing, so that the coil assembly is wrapped by plastic, but the first plug is exposed and connected to one pole of the single-phase power supply, and the second plug is exposed and connected to one end of the other pole of the single-phase power supply.

Preferably, the solenoid valve coil assembly further comprises a magnetic yoke, an upper flux sleeve and a lower flux sleeve; the magnetic yoke is fixed on the outer side of the coil rack, and the upper magnetic conductive sleeve and the lower magnetic conductive sleeve are respectively and fixedly connected with two end faces of the magnetic yoke.

As a second specific embodiment, preferably, the solenoid valve coil assembly further includes a magnetic yoke, an upper flux sleeve, and a lower flux sleeve; the magnetic yoke is fixed on the outer side of the coil frame, so that the through hole arranged on the end face of the magnetic yoke is aligned with the center of the middle hole of the coil frame; the upper magnetic conductive sleeve and the lower magnetic conductive sleeve respectively pass through the through hole in an interference fit manner and are arranged at two ends in the middle hole of the coil rack.

Preferably, a limiting structure is arranged in the central hole of the coil frame, so that the upper magnetic conductive sleeve and the lower magnetic conductive sleeve keep a preset distance in the central hole of the coil frame.

Preferably, solenoid valve coil pack still includes plastic envelope cover, makes the plastic envelope coil pack, nevertheless expose first inserted sheet and connect to the one end of single phase power one utmost point, the one end that the second inserted sheet connects to the single phase power another utmost point and go up the inner wall of magnetic conductive sleeve and lower magnetic conductive sleeve.

For all embodiments, the following preferred designs are possible:

1. the current limiting element which is bridged between the other end of the first inserting piece and the connecting end of the third inserting piece is connected with the first inserting piece and the third inserting piece in a welding mode.

2. If the current limiting element is a one-way conduction element; still connect through a diode between second inserted sheet, the third inserted sheet for the diode is parallelly connected with the coil, the positive pole of diode connects to the second inserted sheet, the negative pole of diode connects to the third inserted sheet.

The solenoid valve coil component provided by the invention has the following advantages:

1. two inserts of traditional intercommunication coil power supply circuit are improved into three inserts, reserve space for the series/parallel connection of current-limiting element and coil, do not influence coil assembly whole volume, and the product structure is compacter, convenient in the subsequent plastic envelope operation of coil assembly.

2. The equal voltage division element of the resistor is connected with the coil in series, and the current is reduced in a voltage division mode, so that the temperature rise of the coil is reduced.

3. And a diode and other one-way conduction elements are connected with the coil in series, so that the current is reduced in a chopping mode, and the temperature rise of the coil is reduced.

4. The diode is connected with the coil in parallel to form a freewheeling diode, so that the impact of the induced voltage on the coil is reduced when the polarity of the power supply is reversed.

5. A limiting structure is arranged in the central hole of the coil frame, so that a preset distance is kept between the upper magnetic sleeve and the lower magnetic sleeve in the central hole of the coil frame, and parasitic air gap magnetic conductance generated by too close distance between the two magnetic sleeves is prevented, thus the main working air gap magnetic flux is shunted, and the electromagnetic attraction is reduced.

6. The plastic sleeve covers the surface of the coil assembly through injection molding, so that the product is protected from being damaged by external force in the assembling and using processes, and the product quality is improved.

Drawings

Fig. 1 is a perspective view of a coil assembly according to embodiment 1 of the present invention;

fig. 2 is a perspective view of a plastic encapsulated coil assembly according to embodiment 1 of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

fig. 4 is a perspective view of a bobbin of the 1 st embodiment of the present invention;

FIG. 5 is a perspective view of an insert according to embodiment 1 of the invention;

fig. 6 is an axial assembly view of a plastic encapsulated coil assembly according to embodiment 1 of the present invention;

fig. 7 is a perspective view of a bobbin of embodiment 2 of the present invention;

fig. 8 is a sectional view of a bobbin of embodiment 2 of the present invention;

FIG. 9 is an axial assembly view of the coil assembly of embodiment 2 of the present invention;

fig. 10 is a perspective view of a coil assembly of embodiment 2 of the present invention;

fig. 11 is a perspective view of a plastic encapsulated coil assembly according to embodiment 2 of the present invention;

fig. 12 is a cross-sectional view of a mold coil assembly according to embodiment 2 of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples.

All matters hithertofore set forth herein are to be interpreted in an illustrative and non-limiting sense.

As embodiment 1 of the present invention (embodiment 1 from the specification of the parent application), as shown in fig. 1 to 3, the coil assembly includes a coil 10, a bobbin 20, a first tab 31, a second tab 32, a third tab 33, and a current limiting element 40. As shown in fig. 4, the coil bobbin 20 is a cylindrical plastic member having an end face 21 at one end. The coil 10 is wound on the cylinder of the coil rack, and the two ends of the coil 10 respectively form the head end and the tail end of the outgoing line. As shown in fig. 1 to 5, a first insertion piece 31, a second insertion piece 32, and a third insertion piece 33 are inserted into the end face of the bobbin 20 in an insulated manner. First inserted sheet 31 and second inserted sheet 32 are used for being connected with the power, both parallel arrangement, and the length of first inserted sheet 31 is greater than the length of second inserted sheet 32. The third insert 33 is disposed behind the second insert 32 in the same direction. The second inserting piece 32 is provided with a wire end welding column 321, and is connected with the head end of the outgoing wire. The third inserting piece 33 is provided with a tail welding column 331 connected with the tail end of the outgoing line. The ends of the first insert sheet 31 and the third insert sheet 33 are provided with terminals (312, 332), and the current limiting element 40 is bridged on the terminals (312, 332) and fixed by soldering. Fig. 2 shows the coil assembly after plastic packaging, which is wrapped by the plastic packaging of the coil assembly with an insulating material to form a plastic packaging cover 50, and only the connecting end in front of the first insertion sheet 31 and the second insertion sheet 32 for power connection is exposed.

As shown in fig. 6, the upper and lower flux sleeves (71, 72) are assembled with an L-shaped iron frame, respectively, and are installed into two ends of the central hole of the coil frame; the two L-shaped iron brackets are snap-connected at their ends and fixed to the plastic envelope 50 of the coil assembly to form a magnetic yoke 60.

As embodiment 2 of the present invention (embodiment 2 from the specification of the parent application), as shown in fig. 9 and 10, the coil assembly includes a coil 10, a bobbin 20, a first insert sheet 31, a second insert sheet 32, a third insert sheet 33, a current limiting element 40, a yoke 60, an upper flux sleeve 71, and a lower flux sleeve 72. As shown in fig. 7, the coil frame 20 is a cylindrical plastic member, and both ends are provided with end faces (21, 22), and the end faces (21, 22) are provided with positioning bosses (211, 221); as shown in fig. 8, a magnetic conductive sleeve positioning ring 23 is arranged in the middle of the hole in the coil rack, and the diameter of the positioning ring 23 is slightly smaller than that of the hole in the coil rack. As shown in fig. 9, the coil 10 is wound around the bobbin cylinder, and the leading end of the lead wire and the trailing end of the lead wire are formed at both ends of the coil 10. A first insertion sheet 31, a second insertion sheet 32 and a third insertion sheet 33 are inserted into the end face 21 of the coil bobbin 20 in an insulated manner. First inserted sheet 31 and second inserted sheet 32 are used for being connected with the power, both parallel arrangement, and the length of first inserted sheet 31 is greater than the length of second inserted sheet 32. The third insert 33 is disposed behind the second insert 32 in the same direction. The second inserting piece 32 is provided with a wire end welding column 321, and is connected with the head end of the outgoing wire. The third inserting piece 33 is provided with a tail welding column 331 connected with the tail end of the outgoing line.

The ends of the first tab 31 and the third tab 33 are connected via a current limiting element 40. The magnetic yoke 60 is designed into a '21274', the upper end surface and the lower end surface of the iron frame are provided with positioning grooves (61, 62) and through holes (63, 64), the positioning grooves (61, 62) are connected with the positioning bosses (211, 221) in a clamping mode, and the through holes (63, 64) are aligned with the center of a hole in the coil frame. The upper and lower magnetic sleeves (71, 72) respectively pass through the upper and lower through holes (63, 64) in interference fit and are arranged at two ends in the central hole of the coil frame.

Fig. 11 and 12 are coil assemblies after being molded, and are wrapped by the coil assemblies plastic package to form a plastic package cover 50, and the connecting ends in front of the first insertion sheet 31 and the second insertion sheet 32 for power connection and the inner walls of the upper magnetic conductive sleeve 71 and the lower magnetic conductive sleeve 72 are exposed.

In both the above embodiments, the current limiting element 40 may be a voltage dividing element such as a resistor, or a unidirectional conducting element such as a diode.

For the retaining ring 23, both of the above embodiments can have the following design (paragraph 6 from the parent application description): the upper and

lower flux sleeves

71, 72 are spaced apart at the location of the mold cavity by locating features, such as steps or ribs, in the mold cavity, which form a stop feature during injection molding.

The above two embodiments may also be modified as follows (from paragraph 2 last of example 1 of the parent application): when the current limiting element 40 is a diode, a freewheeling diode may be connected in parallel across the coil 10. After the first insertion sheet 31 and the second insertion sheet 32 are connected with an alternating current power supply, current from the alternating current power supply enters from the first insertion sheet 31, reaches the third insertion sheet 33 through the current limiting element 40, then enters the coil through the tail wire welding column 331 and the tail end of the outgoing wire, flows out through the head end and the head end welding column 321 of the outgoing wire, and reaches the other end of the alternating current power supply through the second insertion sheet 32. The freewheeling diode is welded between the head-of-wire welding column 321 and the tail-of-wire welding column 331, the anode of the freewheeling diode is welded to the head-of-wire welding column 321, and the cathode of the freewheeling diode is welded to the tail-of-wire welding column 331 (not shown in the figure).

Although the present invention has been described in detail, the technical solutions of the present invention can be generalized by those skilled in the art according to the principles of the parent application without departing from the scope of the claims and the specification of the parent application.

Claims

1. A solenoid coil assembly comprising: the coil frame is wound with a coil, and the first inserting piece, the second inserting piece, the third inserting piece and the current limiting element are arranged on the end face of the coil frame;

one end of the first plug-in strip is used for being connected to one pole of a single-phase power supply; one end of the second plug-in sheet is used for connecting to the other pole of the single-phase power supply, and two winding ends of the coil are in bridge connection with the other end of the second plug-in sheet and the connecting end of the third plug-in sheet; and the other end of the first insert sheet is connected with the connecting end of the third insert sheet in a bridging manner by two terminals of the current limiting element.

2. The solenoid valve coil assembly of claim 1, further comprising a plastic wrap that encapsulates the coil assembly but exposes the first tab for connection to one pole of a single phase power supply and the second tab for connection to an end of the other pole of the single phase power supply.

3. The solenoid coil assembly of claim 2, further comprising a yoke, an upper flux sleeve, and a lower flux sleeve; the magnetic yoke is fixed on the outer side of the coil rack, and the upper magnetic conductive sleeve and the lower magnetic conductive sleeve are respectively and fixedly connected with two end faces of the magnetic yoke.

4. The solenoid coil assembly of claim 1, further comprising a yoke, an upper flux sleeve, and a lower flux sleeve; the magnetic yoke is fixed on the outer side of the coil frame, so that the through hole arranged on the end face of the magnetic yoke is aligned with the center of the middle hole of the coil frame; the upper magnetic conductive sleeve and the lower magnetic conductive sleeve respectively pass through the through hole in an interference fit manner and are arranged at two ends in the middle hole of the coil rack.

5. A solenoid valve coil assembly according to claim 4 wherein the aperture in the bobbin is provided with a stop arrangement to maintain the upper flux sleeve and the lower flux sleeve at a predetermined spacing in the bobbin aperture.

6. The solenoid valve coil assembly of claim 4, further comprising a plastic wrap that wraps the coil assembly but exposes the first tab to connect to one end of one pole of the single phase power supply, the second tab to connect to one end of the other pole of the single phase power supply, and the inner walls of the upper flux sleeve and the lower flux sleeve.

7. The solenoid valve coil assembly of any one of claims 1 to 6, wherein the second terminal of the current limiting element bridges the other end of the first insert tab and the connecting end of the third insert tab, and the current limiting element is connected to the first insert tab and the third insert tab by welding.

8. Solenoid valve coil assembly according to one of claims 1 to 6, characterized in that the current limiting element is a one-way conducting element; still connect through a diode between second inserted sheet, the third inserted sheet for the diode is parallelly connected with the coil, the positive pole of diode connects to the second inserted sheet, the negative pole of diode connects to the third inserted sheet.