KR102357640B1 - A solenoid valve and a sealing method thereof - Google Patents

Abstract

The present invention provides a method for sealing a solenoid valve in which terminals of different materials are installed inside a power terminal in a process of manufacturing a housing of the solenoid valve, the method comprising the steps of: forming a potting hole in a region where the power terminal and the terminals are in contact with each other; and injecting a fluid sealant into the potting hole. The present invention further provides a solenoid valve comprising: a housing; a power terminal disposed to protrude from one side of the housing and having terminals mounted thereinside; a potting hole formed in the housing or the power terminal toward the terminals; and a fluid sealant injected into the housing to seal the potting hole and an accommodating space in which the terminals are mounted inside the housing. The present invention can increase airtightness that should be required for a housing of a solenoid valve.

Description

{A solenoid valve and a sealing method thereof}

The present invention relates to a solenoid valve and a sealing method thereof, and to a solenoid valve capable of sealing an interface between a power terminal and a terminal of the solenoid valve and a sealing method thereof.

In general, a solenoid valve includes a solenoid driving unit generating electromagnetic force, and a valve unit performing an opening/closing operation by the solenoid driving unit.

Such a solenoid valve appears in Korean Patent Registration 10-1011641.

When such a solenoid valve is installed on the turbocharger compressor side, it serves as a bypass valve.

That is, the compressor of the turbocharger is disposed on an intake manifold that introduces fresh air, and an air control valve (throttle valve) capable of controlling an inflow of fresh air is provided on the intake manifold.

According to the opening/closing operation of the air control valve, the pressure inside the pipe connected to the turbocharger compressor changes. In general, when the turbocharger compressor operates, the solenoid valve closes the bypass flow path.

While the turbocharger compressor is operating, if the air inflow is reduced or stopped due to the closing of the air control valve, the turbocharger may be shocked, so the bypass valve is opened to connect the inflow passage and the discharge passage.

Such a solenoid valve satisfies the responsiveness of the solenoid valve in relation to changes in air flow and pressure around the bypass flow path when opening and closing the bypass flow path, and prevents communication between the inflow flow and the discharge flow when the valve is not in operation. It is necessary to maintain the airtightness of the valve.

However, in the conventional power terminal of the solenoid valve housing, terminals of different materials are installed therein. At this time, due to the reduced sealing force through the interface between the power terminal and the terminal, it is difficult to maintain the airtightness of the solenoid valve.

Korean Patent Registration No. 10-1011641 (Registered on Jan. 24, 2011)

The present invention is to solve such a problem, and more particularly, to provide a solenoid valve capable of satisfying airtightness through the potting hole by sealing the potting hole formed in the housing of the solenoid valve, and a sealing method thereof. .

The present invention for accomplishing the above object is a method of sealing a solenoid valve in which a terminal of a different material is installed inside a power terminal in the process of manufacturing the housing of the solenoid valve, in which the power terminal and the terminal are in contact. forming a hole; and injecting a sealing solution into the potting hole. It provides a sealing method of a solenoid valve comprising a.

The sealing method of the solenoid valve may further include applying pressure so that the sealing liquid flows into an area in which the power terminal and the terminal contact each other.

In the step of applying the pressure, vacuum pressure may be applied to the potting hole or air pressure may be applied to the inside of the potting hole.

In the step of applying the pressure, when the vacuum pressure is applied, the vacuum pressure is adjusted so that the air inside the potting hole escapes and the sealing liquid flows into the inside of the receiving space where the terminal is mounted or into the microscopic gap between the housing and the terminal. It may include a vacuum pressure control step.

The step of applying the pressure may include an air pressure control step of adjusting the air pressure to forcibly introduce the sealing solution into an area where the sealing solution has not reached within the potting hole, the receiving space, and the extension hole when the air pressure is applied. have.

The sealing method of the solenoid valve may further include blocking the potting hole by pressing or heating the protrusion protruding outside the potting hole.

In the injecting of the sealing liquid, the sealing liquid may be injected from the inside of the potting hole through a jig hole formed through the terminal to an extension hole extending to a lower portion of the terminal.

The step of applying the pressure may include an interval step of setting a time interval until all of the vacuum pressure is released when the air pressure is applied.

In addition, the present invention is a housing; a power terminal disposed to protrude from one side of the housing and having a terminal mounted therein; a potting hole formed from the housing or the power terminal toward the terminal; and a sealing liquid injected therein to seal the potting hole, an interface between the housing and the terminal, and an accommodating space in which the terminal is mounted in the housing. It provides a solenoid valve comprising a.

The potting hole includes an extension hole disposed under the terminal to communicate with a jig hole formed to penetrate through one side of the terminal, and the sealing solution may be injected up to the extension hole.

When the injection of the sealing liquid is completed, the potting hole may be shielded by pressing or heating the protrusion protruding outside the potting hole.

According to the solenoid valve and its sealing method according to the present invention,

First, it is possible to increase the airtightness that must be necessarily accompanied by the housing of the solenoid valve,

Second, it is easy to inject the sealing liquid by forming a potting hole in the manufacturing process of the housing,

Third, not only the potting hole, but also the receiving space adjacent to or connected to the potting hole and the extension hole are sealed with the sealing solution, thereby preventing leakage of airtightness around the terminal.

Fourth, by shielding the potting hole by pressing or heating the protrusion provided on the inlet side of the potting hole, there is an effect of more reliably sealing the potting hole secondary.

1 is a perspective view showing a solenoid valve according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view illustrating a region II′ of the solenoid valve shown in FIG. 1 .
Fig. 3 is a cross-sectional view showing the inside of the power terminal area of the solenoid valve shown in Fig. 2;
FIG. 4 is a reference view showing a state in which the sealing liquid is injected into the potting hole of the solenoid valve shown in FIG. 3 .
FIG. 5 is a reference view illustrating a state in which the upper protrusion of the potting hole shown in FIG. 3 is shielded through post-processing.
FIG. 6 is an enlarged perspective view of a terminal inside the power supply terminal shown in FIG. 3 .
7 is a block diagram illustrating a sealing method of a solenoid valve according to an embodiment of the present invention.

Since the present invention may have various changes and may have various embodiments, specific embodiments will be illustrated and described in the drawings.

However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms.

The above terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When an element is referred to as being “connected” or “connected” to another element, it is understood that it may be directly connected or connected to the other element, but other elements may exist in between. it should be

On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components are given the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

1 is a perspective view illustrating a solenoid valve according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a region II′ of the solenoid valve shown in FIG. 1 .

1 and 2, the solenoid valve 1 according to the present invention includes a housing 10 mounted on a block B having a bypass flow path BP of a turbocharger, and a housing 10 inside. It includes a solenoid driving unit 100 accommodated, and a valve unit 200 that reciprocates by the solenoid driving unit 100 to open and close the bypass flow path BP.

The solenoid driving unit 100 moves the valve unit 200 by generating electromagnetic force through a control signal and current supply while the external connector is coupled to the power terminal 12 provided on one side of the housing 10 .

First, the solenoid driving unit 100 includes a core 110 positioned inside the housing 10, a bobbin 120 surrounding the core 110, and a coil unit 122 provided to surround the outer peripheral surface of the bobbin 120. includes

And, inside the core 110, the stud 300 is provided to be fixed in the form of a shaft or a rod, and the stud 300 movably supports the valve unit 200 that moves according to the operation of the solenoid driving unit 100, and , serves to guide the reciprocating motion.

In the core 110, a stud 300 is inserted therein, a plunger 202, which is a component of the valve unit 200, is selectively inserted, and a first internal space defining a movable space of the plunger 202 ( 111) and a second inner space 112 disposed between the first inner space 111 and the inner circumferential surface.

A spring 130 is partially inserted and supported in the second inner space 112, and the spring 130 serves to provide an elastic force to the valve unit 200, and when power is applied to the solenoid driving unit, the valve unit ( 200) to close the bypass flow path BP.

The inner diameter of the first inner space 111 is formed larger than the second inner space 112, and is formed slightly larger than the outer diameter of the plunger 202 to provide a space in which the plunger 202 can move smoothly. .

A portion extending from the body of the core 110 is formed around the first inner space 111 to form the first inner space 111 , and magnetic force is concentrated on this portion.

A plate portion 133 is disposed below the bobbin 120 to fix them so that they can be stably positioned in the housing 10 , and a through hole 133a is formed in the center thereof to allow the plunger 202 to move. to form

An extension portion 133b is formed on the inner circumferential surface of the through hole 133a to be spaced apart from the plunger 202 , and disposed to surround the plunger 202 while facing the outer circumferential surface of the plunger 202 .

As will be described later, the space inside the solenoid driving unit 100 and the space between the solenoid driving unit 100 and the valve unit 200 through the spaced apart space between the extended portion 133b of the plate 133 and the plunger 202 (or The valve head movable space) 140 may communicate.

The valve unit 200 includes a plunger 202 movable by the magnetic force of the solenoid driving unit 100, a bush 204 between the plunger 202 and the stud 300, and one end of the plunger 202. It includes a valve head 210 that is fixedly coupled.

A valve head 210 is coupled to an end of the plunger 202 through a washer 220 .

The spring 130 is disposed between one end of the bush 204 and the second inner space 112 of the core 110 to provide an elastic force to push the valve unit 200 outward.

The valve head 210 is provided in the form of a cap, and provides an open inner space.

The side wall of the valve head 210 constitutes a shape surrounding the inner space.

The valve head 210 is surrounded by the flange portion 11 of the housing and the cover 20 coupled to the housing 10 .

The valve head 210 moves along the reciprocating motion of the plunger 202 . In this case, the seal between the valve head 210 and the cover 20 must be maintained.

That is, the valve head 210 must move freely while being sealed. For this purpose, the sealing adopts a so-called lip seal structure. The sealing member 400 in the form of a lip seal is in close contact with the inner surface of the cover 20 and in close contact with the outer peripheral surface of the valve head 210 .

By adopting the sealing member 400 , the space between the cover 20 and the valve head 210 can be sealed while the valve head 210 reciprocates.

The cover 20 is fitted and fixed in the mounting groove 10a provided on one surface (lower surface or upper surface) of the housing 10 .

On the other hand, the portion where the housing 10 and the cover 20 are coupled must also be sealed, and for this purpose, auxiliary sealing members 410 and 420 in the form of an O-ring are disposed inside the coupling structure.

The stud 300 is disposed along the center of the solenoid driving unit 100 and the center of the valve unit 200 , and is positioned to span the area where the two components are disposed.

At least a portion of the stud 300 is provided in the form of a tube or a hollow shaft having an empty space therein, and a communication passage 302 is formed therein.

In addition, a first opening 311 communicating with the internal space of the valve head 210 is provided at one end of the stud 300 .

A second opening 312 is formed in the stud 300 , and the second opening 312 may be provided to penetrate the outer peripheral surface of the stud. Here, a plurality of second openings 312 may be formed on the outer peripheral surface of the stud, and the arrangement height thereof may be different from each other.

The communication passage 302 serves to communicate the first opening 311 and the second opening 312 (and/or the third opening 313), whereby the space around the valve unit 200 (in detail, The air pressure of the space formed by the valve head 210 and the inner space of the housing 10 (in detail, the inner space of the solenoid driving unit 100, the valve unit formed between the solenoid driving unit 100 and the valve unit 200) The pressure in the space between the first inner space 111 , the valve head movable space 140 , and the space between the solenoid driving unit 200 and the inner surface of the housing 10 ) may be balanced.

For smooth air communication, it is important to select the location of the second opening 312 .

To this end, when the second opening 312 is formed on the outer circumferential surface of the stud 300 , its position is at least one of the first internal space 111 or the second internal space 112 of the core 110 . It is preferably formed in the region or all.

However, if the second inner space 112 that is not affected by the movement of the plunger 202 is implemented in the formed region, the movement of air may be smoother.

The valve head movable space 140 is formed by a flange 11 formed at the inlet of the housing 10 , one surface of the valve head 210 , and a space surrounded by the plate 133 and the plunger 202 .

The valve head movable space 140 communicates with the first internal space 111 , which communicates through a space between the extension 133b of the plate 133 and the plunger 202 described above.

Accordingly, when the air outside the valve unit 200 enters through the first opening 311 and the communication passage 302 , it enters the first internal space 111 and the valve unit movable space 140 to achieve pressure equilibrium. is done

Meanwhile, the third opening 313 may be formed at the other end of the stud 300 (the upper end of the stud in the drawing).

In this case, a space is formed between the inner surface of the housing 10 and the core 110 , between the inner surface of the housing 10 and the yoke 125 , and between the inner surface of the housing 10 and the plate 133 . The space 140 between the third opening 313 and the valve head may be communicated with each other.

3 is a cross-sectional view showing the inside of the power terminal area of the solenoid valve shown in FIG. 2, and FIG. 4 is a reference view showing a state in which the sealing liquid is injected into the potting hole of the solenoid valve shown in FIG.

3 and 4 , the power terminal 12 is provided in the lateral direction of the housing 10 .

A plurality of terminals 13 are provided inside the power terminal 12 to which an external connector is coupled to supply a control signal or power. The terminal 13 may be connected to the resistor 113 or the coil unit (see FIG. 2 , 122 ).

A potting hole 14 is formed in the direction of the terminal 13 in a region between the resin housing 10 and the power terminal 12 in contact. For example, the potting hole 14 may be simultaneously formed in the process of molding the assembly of the housing 10 and the terminal 13 by an insert injection method.

The terminal 13 may be partially exposed in the potting hole 14 . In addition, the potting hole 14 includes an extension hole 15 formed toward the lower side of the terminal 13 around the terminal 13 .

In the portion where the terminal 13 is installed between the housing 10 and the power terminal 12, a receiving space 16 is formed around the terminal 13 except for the potting hole 14, and the receiving space 16 is the terminal ( 13) is in close contact with the terminal 13 to support it, but in some areas, the accommodation space 16 is not sealed and a predetermined gap may be formed. That is, when the interface inside the housing 110 in contact with the terminal 13 is slightly uneven or the surface is non-uniform, a fine gap may occur. In addition, the air introduced into the potting hole by the micro-gap may be further introduced into the receiving space.

Therefore, while the housing 10 and the terminal 13 are made of different materials, the micro-gap through the potting hole 14 to prevent the inflow of external air or moisture through the micro-gap (or interface) formed therebetween. sealing can be achieved. In order to seal the micro-gap between the housing 10 and the terminal 13, the sealing solution 17 is filled in the potting hole 14, and the sealing solution 17 permeates between the micro-gap and dries. The potting hole 14 is shielded together. The sealing method of the solenoid valve will be described later.

This sealing liquid 17 penetrates into the potting hole 14 as well as the receiving space 16 in which the micro-gaps around the extension hole 15 and the terminal 13 are formed to close the surrounding space communicating with the potting hole 14 . can be sealed.

FIG. 5 is a reference view showing a state in which the upper protrusion of the potting hole shown in FIG. 3 is shielded through post-processing.

Referring to FIG. 5 , when drying of the sealing liquid (see FIGS. 4 and 17 ) inside the potting hole (see FIGS. 4 and 14 ) is completed, the protrusion (see FIGS. 4 and 18 ) protruding out of the potting hole 14 is removed. The potting hole 14 is shielded by deforming the external shape by pressing or heating. For example, each of the protrusions 18 is pressurized and heated at the same time through a hot stamping process, and the upper portion of the potting hole 14 can be shielded in the shape of a curved cap 18 ′, approximately the same as a partial region of a sphere. . Of course, although not shown in the drawings, the protrusion 18 may be shielded while a separate component (not shown) is coupled, bonded, or attached to the upper portion of the potting hole 14 .

FIG. 6 is an enlarged perspective view of a terminal inside the power supply terminal shown in FIG. 3 .

Referring to FIG. 6 , the terminal 13 is made of a metal material because an electrical connection must be made.

The terminal 13 includes a contact piece 13a exposed to the inner space of the power terminal (see FIGS. 4 and 12 ) and connected to an external connector, a support piece 13b partially exposed to the potting hole (see FIGS. 4 and 14 ), and , the housing (refer to FIG. 4, 10) includes a resistor (refer to FIG. 4, 113) or a coil (refer to FIG. 2, 122) provided inside the connection piece (13c) connected to.

One end of the contact piece 13a may be formed in a pointed or round shape to facilitate connection with the connector. Alternatively, the contact piece 13a may have a shape in which a cross-sectional area becomes smaller toward one end.

The support piece 13b is formed with a jig hole 13d communicating with the extension hole (see FIG. 4, 15) inside the potting hole 14, and fixed between the housing 10 and the power terminal 12. This is the installed area. The support piece 13b may have a shape bent at least once depending on the structure of the housing 10 . The support piece 13b may fix the terminal 13 during the molding process of the housing 10 while the terminal jig is inserted into the jig hole 13d.

The contact piece 13c may be connected to the resistor 113 when the terminal 13 is for signal transmission, and connected to the coil unit 122 for power supply. The contact piece 13c may have an approximately “U” shape to facilitate contact with one end of the resistor 113 or the coil unit 122 .

7 is a block diagram illustrating a sealing method of a solenoid valve according to an embodiment of the present invention.

Referring to FIG. 7 , the sealing method (S100) of the solenoid valve according to the present invention includes the steps of forming a potting hole (S110), injecting a sealing liquid (S120), applying pressure, and shielding the potting hole (S150). ) is included.

First, in the potting hole forming step ( S110 ), the potting hole may be simultaneously formed in the forming step of the housing. That is, in the process of molding the housing, the terminal is disposed inside the power terminal, and the potting hole may be formed so as to communicate or penetrate at least a part of the area in which the power terminal and the terminal contact. Of course, the potting hole may be formed through a separate process after the forming of the housing is completed.

In the step of injecting the sealing liquid ( S120 ), the sealing liquid is injected into the potting hole. In this case, the sealing solution may be injected around the area adjacent to the terminal. Alternatively, the injection may be started so that the sealing liquid is filled from the jig hole or the extension hole of the terminal. As the sealing liquid, either a viscous bond or silicone may be selectively employed.

When the sealing liquid is injected in the area adjacent to the protrusion of the potting hole, it may be difficult to completely inject the sealing liquid to the inside due to the viscosity or internal structure of the sealing liquid. can be started

The step of applying the pressure includes a step of applying a vacuum pressure (S130) and a step of applying an air pressure (S140). However, the step of applying the vacuum pressure (S130) and the step of applying the air pressure (S140) are in a parallel relationship and can be selectively applied. For example, only one of the step of applying a vacuum pressure (S130) or the step of applying the air pressure (S140) may be selectively applied, and any one of the step of applying the vacuum pressure (S130) and the step of applying the air pressure (S140) It may be applied first, followed by the other one.

Hereinafter, only the process of the process will be described in detail regardless of the order of the steps of applying the pressure.

In the step of applying a vacuum pressure (S130), a vacuum pressure is generated inside the housing so that the vacuum pressure is reached inside the potting hole. That is, in the step of applying the vacuum pressure ( S130 ), the vacuum pressure is provided so that the pressure inside the potting hole is maintained in a state lower than the atmospheric pressure.

In this way, when a vacuum pressure is applied to the inside of the potting hole, the air inside the potting hole is discharged to the outside at least in part, and the sealing liquid can be spread over a wider area by equalizing the pressure. That is, as the air inside the potting hole escapes at a low pressure, the sealing liquid may take the place occupied by the air and flow into the peripheral area (eg, micro-gap) between the terminal and the housing. Accordingly, the sealing liquid can be sealed while filling the potting hole, the interface between the housing and the terminal, and the receiving space, thus preventing external air from flowing into the housing inner space through the potting hole.

The step of applying the vacuum pressure (S130) includes the step of controlling the vacuum pressure (S131).

In the vacuum pressure control step (S131), the vacuum pressure is adjusted so that the vacuum pressure extends to the receiving space including the inside of the potting hole as the air inside the potting hole is discharged. In this case, the magnitude of the vacuum pressure may be provided within a set pressure range. Of course, according to the size or scale of the potting hole, the vacuum pressure may be selectively controlled in a low vacuum range, as well as a fine vacuum range or a high vacuum range or an ultrahigh vacuum range.

In addition, the vacuum pressure control step ( S121 ) may control the time for which the set vacuum pressure is delivered to the inside of the potting hole, together with the control of the magnitude of the vacuum pressure.

In the step of applying air pressure (S140), air pressure is applied by blowing air into the potting hole, the receiving space, and the extension hole.

When the air pressure is forcibly applied in this way, the sealing liquid can be forcibly introduced while the pressure is momentarily transferred to the areas where the sealing liquid has not reached the potting hole, the receiving space, and the extension hole.

The step of applying the air pressure (S140) includes the air pressure control step (S141).

In the air pressure control step (S141), air pressure is supplied for a shorter time compared to the step (S131) of controlling the vacuum pressure. For example, in the air pressure control step S131 , air may be supplied at least once or a plurality of times in a set pressure range and a set time range. If air pressure is provided several times in a short time in this way, the sealing liquid is gradually pushed into the unreachable area inside the potting hole, the receiving space, and the extension hole. have.

In addition, when the step of applying the vacuum pressure (S130) precedes the step of applying the air pressure (S140), it may be continuously performed before all the vacuum pressures formed in the step of applying the vacuum pressure (S130) are released. In this case, when the vacuum pressure is suddenly released before the vacuum pressure is exhausted or while the vacuum pressure is applied, the high pressure external air is supplied into the potting hole in the low pressure state, so that air is forcibly injected in the step (S140) of giving the air pressure. It is possible to provide the same effect as the effect, and at the same time, since the air pressure is applied a plurality of times, the number of steps in the step of applying the air pressure can be reduced at least once, and the effect according to the air pressure supply can be maximized.

As a similar embodiment, although not shown in the drawings, the step of applying the air pressure (S140) is performed by repeating the process of applying the vacuum pressure and rapidly withdrawing the vacuum pressure in the step of applying the vacuum pressure (S130) a plurality of times. It is also possible to achieve the effect of applying air pressure without applying air pressure.

Alternatively, it may include an interval step (not shown) in which a time interval is set until all of the vacuum pressure formed in the step of applying the vacuum pressure ( S130 ) is released. The interval step may allow time to slowly release the vacuum pressure over a period of several seconds to allow the sealant to push as far as possible into the pressure sphere during the interval time.

When the step of injecting the sealing liquid (S120) or the step of applying the pressure is completed, the step of blocking the potting hole (S150) is performed. In this case, the sealing solution may be completely dried or a step (S150) of shielding the potting hole may be performed even in a dry state. More preferably, the step (S150) of shielding the potting hole is preferably performed after the sealing liquid is completely dried.

In the step of shielding the potting hole (S150), the shielding is performed by pressing or heating the protrusion that protrudes from the upper surface of the housing at the inlet side of the potting hole. As described above, the step of shielding the potting hole may be performed through a hot stamping process. A description related thereto is omitted because it overlaps with the description of the device above.

Therefore, according to the solenoid valve and the sealing method thereof according to the embodiment of the present invention, the airtightness essential in the housing of the solenoid valve can be increased, and the sealing liquid is injected by forming a potting hole during the manufacturing process of the housing. It is easy, and not only the potting hole, but also the receiving space adjacent to or connected to the potting hole and the extension hole are sealed with the sealing liquid to prevent leakage of airtight around the terminal. By shielding the potting hole through the secondary, there is an effect of more reliably sealing the potting hole.

In the above, specific embodiments have been shown and described to illustrate the technical spirit of the present invention, but the present invention is not limited to the same configuration and operation as the specific embodiments as described above, and various modifications do not depart from the scope of the present invention. can be carried out within Accordingly, such modifications should be considered to fall within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

1: Solenoid valve
10: housing 12: power terminal
13: Terminal 14: Porting Hall
100: solenoid driving unit 110: core
120: bobbin
130: spring
200: valve unit

Claims (11)

In the process of manufacturing the housing of the solenoid valve, the sealing method of the solenoid valve in which terminals of different materials are installed inside the power terminal,
forming a potting hole in a region where the power terminal and the terminal contact; and
injecting a sealing solution from the inside of the potting hole through a jig hole formed through the terminal to an extension hole extending to a lower portion of the terminal;
A sealing method of a solenoid valve comprising a. The method according to claim 1,
The method of sealing a solenoid valve, characterized in that it further comprises the step of applying a pressure so that the sealing liquid flows into the area in which the power terminal and the terminal are in contact. 3. The method according to claim 2,
The step of applying the pressure is
A method of sealing a solenoid valve, characterized in that applying vacuum pressure to the potting hole or applying air pressure to the inside of the potting hole. 4. The method according to claim 3,
The step of applying the pressure is
When the vacuum pressure is applied, the vacuum pressure control step of adjusting the vacuum pressure so that the air inside the potting hole escapes and the sealing liquid flows into the inside of the receiving space where the terminal is mounted or the microscopic gap between the housing and the terminal. Sealing method of a solenoid valve, characterized in that it comprises. 4. The method according to claim 3,
The step of applying the pressure is
and an air pressure control step of adjusting the air pressure to forcibly introduce the sealing liquid into an area where the sealing liquid has not reached within the potting hole, the receiving space, and the extension hole when the air pressure is applied. sealing method. The method according to claim 1,
The sealing method of the solenoid valve according to claim 1, further comprising the step of blocking the potting hole by pressing or heating the protrusion protruding outside the potting hole. delete 6. The method of claim 5,
The step of applying the pressure is
When applying the air pressure, the sealing method of the solenoid valve, characterized in that it comprises an interval step of leaving a time interval until all the vacuum pressure is released. housing;
a power terminal disposed to protrude from one side of the housing and having a terminal mounted therein;
a potting hole formed from the housing or the power terminal toward the terminal; and
a sealing liquid injected into the potting hole, an interface between the housing and the terminal, and an accommodating space in which the terminal is mounted in the housing; including,
The potting hole includes an extension hole disposed on the lower side of the terminal to communicate with the jig hole formed to penetrate through one side of the terminal, and the sealing liquid is injected up to the extension hole. delete 10. The method of claim 9,
When the injection of the sealing liquid is completed, the solenoid valve, characterized in that the potting hole is closed by pressing or heating the protrusion protruding outside the potting hole.

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