KR101749735B1 - A solenoid valve - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve, and more particularly, to a solenoid valve capable of smoothly operating a valve unit or improving opening / closing responsiveness.
A valve unit movably disposed and operable by the solenoid driving unit; A support portion fixed to the housing and movably supported by the valve unit; and a communication passage provided in the support portion to communicate the outer space of the housing with the inner space of the housing. .
The supporting portion is provided at least partially in the form of a hollow tube, and a first opening is formed at one end thereof, and another opening is formed at the other end or the outer peripheral surface thereof. The first opening and the other opening are connected .

Description

A solenoid valve

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve, and more particularly, to a solenoid valve capable of improving opening / closing responsiveness of a valve unit.

The solenoid valve includes a solenoid driving unit for generating an electromagnetic force and a valve unit for performing opening and closing operations by a solenoid driving unit.

Such a solenoid valve is disclosed in Korean Patent No. 10-1011641.

When this solenoid valve is installed on the side of the turbocharger compressor, it functions as a bypass valve.

That is, the compressor of the turbocharger is disposed on an intake manifold through which fresh air is introduced, and an air control valve (throttle valve) capable of regulating the inflow amount of the fresh air is provided on the intake manifold.

In accordance with the opening and closing operation of the air control valve, the pressure inside the piping connected to the turbocharger compressor changes. Normally, when the turbocharger compressor operates, the solenoid valve closes the bypass passage.

When the turbocharger compressor is operated, when the inflow of air is reduced or stopped due to the closing of the air control valve, the turbocharger may be impacted, so that the bypass valve is opened to communicate the inflow passage and the discharge passage.

However, when the bypass valve is opened or closed, the response of the solenoid valve must be made in relation to the change of the air flow and the pressure around the bypass valve. In the case of the conventional solenoid valve, such a response performance is unsatisfactory There was a problem.

The present invention has an object of facilitating the operation of the solenoid valve and enhancing the responsiveness by adopting a structure capable of communicating the inside and the outside of the solenoid valve.

According to an aspect of the present invention, there is provided an electronic apparatus including a housing, a solenoid driving unit disposed in the housing, A valve unit movably disposed in the housing and operable by the solenoid driver; A support portion fixedly installed in the housing and movably supported by the valve unit and a communication passage provided in the support portion for communicating the outer space of the housing with the inner space of the housing .

The supporting portion is provided at least partially in the form of a hollow tube, and a first opening is formed at one end thereof, and another opening is formed at the other end or the outer peripheral surface thereof. The first opening and the other opening are connected .

The first opening is disposed to face the valve unit direction, and the other opening is disposed to face the inner space of the housing.

The valve unit comprising: A plunger provided to be capable of reciprocating according to the operation of the solenoid driving part; and a valve head which is coupled to the plunger and reciprocates according to the operation of the plunger and forms a space open to the outside in the inside thereof, And the other opening communicates with a space between the solenoid driving unit and the valve unit.

The solenoid driving unit includes a core, a bobbin surrounding the core, and a coil wound around the bobbin, wherein a space formed between the plunger and the solenoid driving unit communicates with the second opening.

And a space formed between the plunger and the solenoid driving unit is formed to communicate with a valve head movable region formed in the housing.

The other opening is a third opening formed at the other end of the supporting part, and the third opening is communicated with a space formed between the solenoid driving part and the inner surface of the housing.

And a space formed between the solenoid driving part and the inner surface of the housing is formed to communicate with a valve head movable area formed in the housing.

Wherein the core constituting the solenoid driving part includes a first internal space part in which a plunger constituting the valve unit can be selectively inserted and moved, And a second internal space part communicating with the first internal space part and having a part of a spring for elastically supporting the valve unit inserted and supported therein, wherein the second opening part has at least one of the first internal space part and the second internal space part And is located in one area.

According to another aspect of the present invention, there is provided an electronic apparatus including a housing, a solenoid driving unit disposed inside the housing, A valve unit movably disposed in the housing and operable by the solenoid driver; A valve unit disposed in the housing so as to communicate with a space around the valve unit and a space inside the housing, the valve unit being movably supported in the housing, And a communication passage formed in the fixed structure.

According to the present invention, by canceling not only the magnetic force but also the pressure gradient of the air during the opening and closing operation of the bypass, the operation of the valve unit can be smoothly performed, and the moving speed can be increased,

Since the plunger movable space inside the solenoid drive unit and the valve head machining space inside the housing communicate with each other, the movement of the air and the movement of the inside of the valve Air dispersion can be achieved quickly.

Further, by providing a hollow shaft or tube-shaped support member fixed inside the housing, the guide performance of the valve unit can be maintained while achieving weight reduction.

1 is a side cross-sectional view of the present invention.
FIG. 2 shows a state in which the solenoid valve according to the present invention opens the bypass passage.
FIG. 3 shows a state in which the solenoid valve according to the present invention closes the bypass flow path.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms.

The 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 a first component, and similarly, the first component may also be referred to as a second component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

 Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

1, a solenoid valve 1 according to the present invention includes a housing 10 mounted on a block (see FIG. 2, B) having a bypass passage (see FIG. 2, A solenoid driving part 100 accommodated in the housing 10 and a valve unit 200 for reciprocating the solenoid driving part 100 to open and close the bypass flow path BP.

The solenoid driver 100 generates an electromagnetic force in accordance with a signal input by an external connector and a current input to move the valve unit 200.

The structure of the solenoid driver 100 is as follows.

A core 110 positioned inside the housing 10, a bobbin 120 surrounding the core 110, a coil part 122 provided to surround the bobbin 120, And a yoke 125 disposed and opposed to the inner surface of the housing 10.

A supporting part 300 is fixed to the core 110 in a shaft or rod shape. The supporting part 300 movably supports the moving valve unit 200 according to the operation of the solenoid driving part 100, It plays a role in guiding the movement.

The core 110 has an inner diameter portion 113 to which the support portion 300 is inserted and fixed and a valve member 202 that selectively inserts the plunger 202 as one component of the valve unit 200 and defines a movable space of the plunger 202 1 inner space portion 111 and a second inner space portion 112 disposed between the first inner space portion 111 and the inner diameter portion 113.

A spring 130 is partially inserted into and supported by the second internal space 112. The spring 130 serves to provide an elastic force to the valve unit 200. When the power supply to the solenoid driving unit is interrupted, Can close the bypass flow path BP.

The inner diameter of the first inner space portion 111 is formed to be larger than that of the second space portion 112 and the inner diameter of the first inner space portion 111 is formed to be slightly larger than the outer diameter of the plunger 202 so that the plunger 202 can move smoothly to provide.

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

In the case of the yoke 125, magnetic force is concentrated in the solenoid driver 100 when magnetic force is generated.

To this end, the yoke 125 is provided to surround a part of the core 110, the bobbin 120, and the coil 122.

A plate portion 133 is disposed at one side of the yoke 125 and the bobbin 120 so as to be stably positioned in the housing 10. A through hole 133a is formed at the center of the plate portion 133, Thereby forming a movable space.

An extension portion 133b is formed at an edge of the through hole 133a to be spaced apart from the plunger 202 so as to face the outer circumferential surface of the plunger 202 so as to surround the plunger 202. [

The space between the solenoid driver 100 and the solenoid driver 100 and the space between the solenoid driver 100 and the valve unit 200 or the space between the solenoid driver 100 and the plunger 202 can be controlled through the spacing space between the extension 133b of the plate 133 and the plunger 202, Valve head movable space) 140 can communicate with each other.

The valve unit 200 includes a plunger 202 movable by the magnetic force of the solenoid driver 100, a bush 204 between the plunger 202 and the support 300, And a valve head 210 fixedly coupled thereto.

The valve head 210 is coupled to the plunger 202 by a washer 220.

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

The valve head 210 is provided in a cap shape and provides an open space.

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

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

The valve head 210 moves in accordance with the reciprocating motion of the plunger 202. In this case, sealing 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 seal adopts a so-called lip seal structure.

The lip seal type sealing member 400 includes a first sealing portion 401 adhered to the inner surface of the cover 20, a second sealing portion 402 adhered to the outer surface of the valve head 210, And a third sealing part 403 connecting the second sealing part 402 and the sealing part 403 to the opening edge of the cover 20.

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

When the housing 10 and the cover 20 are coupled to each other, the coupled portion must also be sealed. For this purpose, sealing members 410 and 420 in the form of O- .

The support portion 300 is disposed along the center of the solenoid drive portion 100 and the center of the valve unit 200, and is positioned over an area where the two components are disposed.

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

A first opening 311 communicating with the inner space of the valve head 210 is provided at one end of the support part 300.

A second opening 312 is formed in the supporting part 300. The second opening 312 may be formed to penetrate the outer surface of the supporting part. The third opening 313 may be formed at the other end of the supporting part 300.

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

The reason why such pressure equilibrium is necessary will be described later.

The positioning of the second opening 312 is important for smooth air communication.

When the second opening 312 is formed on the outer peripheral surface of the supporting part 300, the position of the second opening 312 may be at least one of the first internal space 111 and the second internal space 112 of the core 110 Region or both.

However, if the second internal space 112 is formed in the region where the plunger 202 is not affected by the movement of the plunger 202, the air can be smoothly moved.

The valve head movable space 140 is formed by a flange 11 formed at an inlet of the housing 10, a 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 through the spacing space between the extension 133b of the plate 133 and the plunger 202

Therefore, when air outside the valve unit 200 enters the first opening 311 and the communication passage 302, the first internal space portion 111 and the valve unit movable space 140 enter, .

Meanwhile, the third opening 313 may be formed at the other end of the supporting part 300 (the upper end of the supporting part in the figure).

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, between the inner surface of the housing 10 and the plate 133 So that the third opening 313 and the valve head movable space 140 can communicate with each other.

Hereinafter, the operation of the present invention will be described with reference to the accompanying drawings.

2, a bypass flow path BP is formed in the turbocharger flow path housing, the bypass flow path BP is formed of a suction side BP1 and a discharge side BP2, and a solenoid The valve 1 operates while opening and closing the valve.

Fig. 2 shows a case in which the solenoid valve 1 performs an opening operation, and Fig. 3 shows a case in which the solenoid valve 1 performs a closing operation.

Back pressure is generated on the turbocharger suction area side when the throttle valve (not shown) is closed while the bypass line BP is closed in accordance with the closing operation of the solenoid valve 1 and the supercharger is replaced by the turbocharger If the compressor is operated by excessive force, the compressor may be damaged.

Therefore, it is necessary to quickly communicate the suction side BP1 and the discharge side BP2 in order to quickly solve the back pressure. For this purpose, the solenoid valve 1 opens the bypass flow path BP.

The operation for this is shown in FIG.

As shown in FIG. 2, when power is applied to the solenoid valve 1, a current flows through the coil 122, thereby generating a magnetic field.

The plunger 202 moves to the core 110 and the valve head 210 moves toward the inside of the housing 10 as the plunger 202 moves.

Although the spring 130 supports the valve unit 210 in the pushing-out direction, the magnetic force overcomes the valve unit 210, so that the valve unit 210 can move in the above-described direction.

At this time, if the pressure is P3, then P3 is smaller than the pressure P1 of the suction side BP1 at the time of closing the bypass passage described later, but is larger than the pressure P2 of the discharge side BP2

This is because the pressure P2 of the discharge side BP2 and the air of the pressure P1 of the suction side BP1 are mixed with each other and the pressure rises more than P2.

In this case, the air of the bypass flow path BP flows into the housing 10 through the communication flow path 302 in a state where the pressure of the entire bypass flow path BP is changed to P3.

Thereby, the air pressure around the valve unit 200 (in particular, the bypass flow passage and the space around the valve head) and the pressure inside the housing 10 are in equilibrium.

The valve unit 200 may be moved away from the core 110 by the restoring force of the spring 130 to block the bypass flow path BP.

The gap between the cover 20 provided with the sealing member 400 and the valve unit 200 due to the sealing function of the sealing member 400 having the lip seal structure The air does not flow through.

The air communication between the inside and the outside of the solenoid valve 1 is prevented through the region other than the communication passage 302 and the first, second and third openings 311, 312 and 313 of the support portion 300, So that the movement of the valve unit 200 can be prevented.

3 , when no voltage is applied to the solenoid valve 1, the spring 130 pushes the valve unit 200 so that the valve unit 200 is separated from the solenoid driving unit 100 as much as possible State.

As a result, the best end of the valve head 210 is brought into close contact with the seat portion S formed on the bypass flow path.

When the compressor (not shown) of the turbocharger is operated, the suction side BP1 connected to the portion in which the air flows in the intake passage becomes the high pressure P1 and is connected to the portion of the intake passage after the air passes through the compressor And the discharge side BP2 becomes the low pressure P2.

The air of the input side BP1 is supplied to the inside of the housing 10 by the first opening 311, the communication passage 302, the second opening 312 (and / or the third opening 313) ≪ / RTI >

The first inner space 111 of the core 110 serving as the movable region of the plunger 202 and the second inner space 112 thereon and the gap between the plate 133 and the valve head 210 The pressure in all the areas inside the housing 10 such as the valve head movable space 140 becomes equal to the pressure P1 of the suction side BP1.

Further, when a separate spacing space is formed on the inner surface of the core 110, the inner surface of the housing 10, the inner surface of the yoke 125 and the housing 10, and the inner surface of the plate 133 and the housing 10, Becomes equal to the pressure P1 of the suction side BP1.

Thereby, a pressure balance state is established in which the pressure inside the solenoid valve 1 and the pressure at the suction side BP1 become equal to each other.

2, when the valve unit 200 is opened, the interior of the housing 10 will have a pressure similar to or the same as the atmospheric pressure, The pressure P3 inside the housing 10 is formed to be higher than the pressure inside the housing 10.

In this state, when the power to be applied to the solenoid driving part 100 is cut off, the spring 130 is stretched by the restoring force of the compressed spring 130 to push the valve unit 200 away from the core 110.

However, there is a problem that the pressure inside the housing is lower than the pressure of the bypass flow path BP, causing a resistance to cause the valve unit 200 to move, or the closing speed to be lowered.

To solve this problem, a spring (a strong spring) having a relatively large spring stiffness coefficient (aka K value) can be used, but in such a case, when the valve unit 200 is opened, such spring acts as a resistor.

Therefore, if there is no communication passage 302 and the first opening 311, the second opening 312, and the third opening 313, the dilemma is confronted.

However, according to the present invention, since the communication passage 302 and the first opening 311, the second opening 312 and the third opening 313 are provided, when the valve unit 200 is opened, The pressure inside the bypass valve BP can be made equal.

Accordingly, even when the power supply to the solenoid driving unit 100 is stopped, the spring unit is expanded by the restoring force without pushing the resistance of the air pressure, and the closing operation of the valve unit 200 is rapidly performed by pushing the valve unit 200 .

Therefore, it is possible to use a spring having an elastic modulus that is relatively smaller than the spring coefficient to be used when there is no communication channel.

When a spring having a relatively small elastic modulus is used, the resistance is relatively small even when power is applied to the solenoid driving part 100 as shown in FIG. 3, so that the valve unit 200 can be opened quickly.

The communicating flow path 302 is formed in the housing 10 so as to communicate the space around the valve unit 200 and the space inside the housing 10, (Such as a cover or a plate, a core, a yoke, or the like) that is located in the housing 10 or is located inside the housing 10 or is coupled to the housing.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, Or equivalent embodiments are possible.

Accordingly, the true scope of the present invention should be determined by the technical idea of the claims.

100: Solenoid driver 110: Core
111: first inner space 140: valve head movable space
200: valve unit 202: plunger
210: valve head 300: support
302: communication flow path 311: first opening
312: second opening 313: third opening
400: sealing member

Claims (10)

A housing,
A solenoid driving unit disposed inside the housing;
A valve unit movably disposed in the housing and operable by the solenoid driver;
A support member fixedly installed in the housing and movably supported by the valve unit;
And a communication passage provided in the support portion to communicate the outer space of the housing and the inner space of the housing,
The supporting portion is at least partially provided in the form of a hollow tube,
A first opening is formed at one end thereof and another opening is formed at the other end or an outer peripheral surface thereof, the first opening and the other opening are connected by the communication passage,
The valve unit comprising:
A plunger provided so as to reciprocate according to the operation of the solenoid driving unit,
And a valve head which is coupled to the plunger and is reciprocatable according to the operation of the plunger and which is formed in a cap shape so as to form a space open to the outside inside thereof and to surround the space therebetween,
The first opening is provided so as to communicate with a space surrounded by a side wall surface of the valve head,
And the other opening communicates with a space between the solenoid driver and the valve unit,
Further comprising a sealing member disposed between the valve head and the cover such that the valve head is surrounded by a cover coupled to the housing and the sealing between the valve head and the cover is maintained. delete delete delete The method according to claim 1,
The solenoid driver includes a core, a bobbin surrounding the core, and a coil wound around the bobbin,
Wherein a space formed between the plunger and the solenoid driving unit communicates with a second opening constituting the other opening. 6. The method of claim 5,
And a space formed between the plunger and the solenoid driving unit is formed to communicate with a valve head movable area formed in the housing. The method according to claim 1,
The other opening is a third opening formed at the other end of the support,
And the third opening communicates with a space formed between the solenoid driver and the inner surface of the housing. 8. The method of claim 7,
Wherein a space formed between the solenoid driving portion and the inner surface of the housing is formed to communicate with a valve head movable region formed in the housing. The method according to claim 1,
Wherein the other opening is a second opening formed to penetrate the outer peripheral surface of the support portion,
Wherein the core constituting the solenoid driving portion includes a first internal space portion in which the plunger constituting the valve unit can be selectively inserted and moved, and a portion of the spring communicating with the first internal space portion and elastically supporting the valve unit And a second internal space part which is inserted and supported,
And the second opening is located in the second internal space area. A housing,
A solenoid driving unit disposed inside the housing;
A valve unit movably disposed in the housing and operable by the solenoid driver;
A support member fixedly installed in the housing and movably supported by the valve unit;
And a communicating passage formed in a fixed structure that is located in the housing, inside the housing, or coupled to the housing to communicate the space around the valve unit with the space inside the housing,
The first opening portion is formed at one end of the fixing structure and the other opening portion is formed at the other end portion or the outer peripheral surface thereof and the first opening portion and the other opening portion are connected by the communication passage,
The valve unit comprising:
A plunger provided so as to reciprocate according to the operation of the solenoid driving unit,
And a valve head which is coupled to the plunger and is reciprocatable according to the operation of the plunger and which is formed in a cap shape so as to form a space open to the outside inside thereof and to surround the space therebetween,
The first opening is provided so as to communicate with a space surrounded by a side wall surface of the valve head,
And the other opening communicates with a space between the solenoid driver and the valve unit,
Further comprising a sealing member disposed between the valve head and its surrounding components to maintain sealing between the valve head and its surrounding components.

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