KR100941994B1 - A Micro Valve Of AirPressure - Google Patents

Abstract

The present invention relates to a pneumatic microvalve and, for this purpose, a pneumatic microvalve comprising a first body having a bobbin wound with a coil wound along an axial direction, a stator and a flange formed inside the bobbin, A second body fixed to a central portion of the second body and being in communication with a plurality of air ports, a second body having a plurality of air ports formed along the width direction, The stator and the flange are disposed so as to cross each other along the axial direction of the channel connector so that the stator and the flange are in close contact with the flange. : 6, and a protection circuit means for suppressing the surge current at the moment of power supply.

Air pressure, microvalve, air port, channel connector, body, flanger

Description

[0001] The present invention relates to a micro valve < RTI ID = 0.0 >

In order to maximize the attractive force, the present invention distributes the length ratio of the stator and the flanger to 4: 6, and also generates a minimum magnetic force for operation with a minimum power consumption of 0.1 watt, To a pneumatic microvalve having a protection circuit means with improved speed.

In general, the key technologies of pneumatic microvalves are high responsiveness, high speed, low power consumption, high discharge capability, high precision control, high performance, and high reliability.

This pneumatic microvalve technology is a combined technology of electric, electronic, and machine, and it is applicable to IT, NT, BT, and so on because it has a wide range of applications throughout the industry for reasons of cleanliness, non- explosion, low cost, It is the basis of ET technology.

Particularly, pneumatic microvalve technology is divided into DC type and AC type according to the target power source, and all of them are composed of a plunger that moves when magnetic force is generated around the coil.

At this time, core technologies of pneumatic microvalves are Flanger's maximum attraction force determination technique, flux density analysis technique, flange size and shape determination technology, optimal bobbin designing technology, magnetic material analysis and decision technology considering safety factor and temperature rise have.

Particularly, there is a large difference in magnetic flux density depending on the length of the stator (core) and the flanger in the bobbin, which greatly affects the attraction force, power consumption, and the amount of the coil.

Therefore, it is possible to optimize the length of the stator and the flanger to maximize the attractive force, and to form the minimum magnetic force for operation at the minimum power consumption with minimum power consumption, so that the operation response speed of the flanger to the stator can be improved An air pressure microvalve is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a bobbin having a first body in which a bobbin wound with a coil is wound along an axial direction, a stator and a flange, A second body fixed to an end of the first body and having a plurality of air ports formed along the width thereof, a flow path connector fixed to a central portion of the second body and communicating with the plurality of air ports, And a poppet which is installed across the axial direction of the flow path connector so as to intermittently connect the air port of the body and the end of which is in close contact with and cooperates with the flange, And a protection circuit means for suppressing the surge current at the moment of power supply, wherein the ratio is 4: 6 in order to maximize the suction force.

According to the pneumatic microvalve of the present invention, the length ratio between the stator and the flanger is distributed to 4: 6 so as to maximize the suction force, and a minimum magnetic force for operation is formed with a minimum power consumption of 0.1 watt, There is an advantage that the operation response speed of the flanger with respect to the engine can be improved.

Hereinafter, the pneumatic microvalve according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a sectional view of a pneumatic microvalve according to the present invention.

As shown in FIG. 1, the length ratio of the stator 21 and the flange 20 is 4: 6 in order to maximize the suction force, and the minimum power consumption of 0.1 watt And a protective circuit means (60) for improving the response speed of the flange (20) with respect to the stator (10) so as to form a magnetic force of the flange (20).

The pneumatic microvalve 100 is composed of two parts: a first body 10 and a second body 30.

Here, the first body 10 has a bobbin 11 in which a coil 12 is wound inside.

At this time, the bobbin 11 has a structure in which the stator 21 and the flange 20 are disposed with a gap therebetween.

Therefore, when power is connected to the coil 12, the flange 20 comes into close contact with the stator 21 with no gap due to the magnetic force.

On the contrary, when the power source is shut off, the magnetic force is lost, and the flange 20 is separated from the stator 21 to form a gap. This is possible by resilient return of the elastic means 201 mounted on the outer peripheral surface of the end portion of the flange 20.

Therefore, the flange 20 is structured to move up and down according to the power supply.

On the other hand, it is preferable that the length ratio of the stator 21 and the flanger 20 is 4: 6 in terms of the optimum ratio for maximizing the suction force. Otherwise, the responsiveness of the flange 20 is not preferable.

The second body 30 is disposed at the end of the first body 10 and has a plurality of air ports 31, 32, and 33 formed along the width thereof.

At this time, a flow path connector 40, which is in communication with a plurality of air ports 31, 32, 33, is coupled to the inside of the central portion of the second body 30.

The flow path connector 40 is provided with a poppet 50 crossing the axial direction.

The end of the poppet 50 is in close contact with the upper end of the flange 20 and interlocked with the upper end of the flange 20. When the poppet 50 is lifted and lowered, the air ports 31, 32, 33 of the second body 30 are interrupted .

Here, the flow path connector 40 further includes a vent hole 41 through which the remaining air can be discharged to the residual pressure air discharge port 33 as the poppet 50 ascends and descends.

The air ports 31, 32 and 33 include air intake ports 31 that are closed by the rise of the poppet 50, air intake ports 31 that are opened by the fall of the poppet 50, And a residual pressure air exhaust port 33 for discharging the internal residual pressure when the poppet 50 is lifted or lowered.

The present invention preferably includes a protection circuit means (60) for suppressing the surge current at the moment of power supply. The protection circuit means 60 will be described later with reference to the drawings.

Hereinafter, the operation of the pneumatic microvalve according to the present invention will be described in brief with reference to the attached drawings.

FIG. 2A is a first operation diagram of shutting off the air supply of the air pressure microvalve according to FIG. 1, and FIG. 2B is a second operation diagram of opening air supply of the air pressure microvalve according to FIG.

2A, when the power to the coil 12 is cut off, the flange 20 is raised by the elastic return force of the elastic means 201, and the raised flange 20 Pushes up the poppet 50 to block the air intake port 31 to block the intake of air.

At this time, the residual air pressure exhaust port 33, the vent hole 41, and the air exhaust port 32 are structured to communicate with each other.

As shown in FIG. 2B, when power is applied to the coil 12, the flange 20 is brought into close contact with the stator 21 with no gap due to the magnetic force.

At this time, the elastic means 201 is compressed, and at the same time, the poppet 50 is also interlocked with the flange 20 to open the air intake port 31 which is shut off.

The air introduced through the air intake port 31 is discharged to the air discharge port 32 and the residual air suction port 31 and the air hole 41 are blocked by the poppet 50. [

Hereinafter, the protection circuit means will be described in detail with reference to the accompanying drawings.

Fig. 3A is a circuit diagram showing an embodiment of the protection circuit means. Fig.

Referring to FIG. 3A, the configuration of the protection circuit means will be described with reference to FIGS. 3A and 3B. L1.

A resistor R1, a switching diode D1 and a switching diode D2 are connected in series between the power supply unit 70 and the ground.

The resistor R2 and the capacitor C1 are connected in parallel to the resistor R1 and the switching diode D1 so that the initial operation ON), the surge current is prevented.

A bipolar transistor Q1 having a base connected to the capacitor C1 and a resistor R3 connected between the collector and the emitter is provided between the capacitor C1 and the ground.

A capacitor C2 is connected in parallel to the connection point of the resistor R2 and the bipolar transistor Q1 and the resistor R3. A resistor R4 and an inductor L1 are connected in parallel to the capacitor C2. One end coil of the pneumatic microvalve is electrically connected to the connection point of the capacitor R4 and the capacitor C1 and the other end coil of the pneumatic microvalve is electrically connected to the connection point of the inductor L1 and the ground.

3B is a circuit diagram showing another embodiment of the protection circuit means.

Referring to FIG. 3B, the protection circuit means includes various resistors R1, R2, and R3, switching diodes D1, D2, and D3, capacitors C1 and C2, and a bipolar transistor Q1.

A resistor R1, a switching diode D1 and a switching diode D2 are connected in series between the power supply unit 70 and the ground.

The resistor R2 and the capacitor C1 are connected in parallel to the resistor R1 and the switching diode D1 and are connected in parallel to each other by using the charging effect of the capacitor C1 and the low- And is configured to prevent a surge current that abruptly flows when driving (ON).

Bipolar transistor Q1 is provided between capacitor C1 and ground and has a base connected to capacitor C1 and a resistor R3 connected between the collector and emitter.

The condenser C2 and the resistor R4 are connected in parallel to the connection point between the resistor R2 and the bipolar transistor Q1 and the resistor R3 and the connection point between the resistor R2 and the condenser C2 is connected to one end of the pneumatic microvalve And the other end coil of the air pressure microvalve is electrically connected to the connection between the resistor R3 and the resistor R4.

The protection circuit means of the present invention having such a configuration is configured such that when an initial driving power is supplied from a power supply unit (not shown), the current instantly flows through the capacitor C1, By delaying the current transfer using a low pass effect, surge removal and filtering are performed.

Then, the capacity of each element is appropriately adjusted to generate surge current suppression as well as power for minimum magnetic force for attracting the stator and the flanger.

In this way, the power supplied to the stator and the flanger is reduced to the minimum power, thereby reducing the power consumption through the power-saving driving.

1 is a sectional view of a pneumatic microvalve according to the present invention;

FIG. 2A is a first operation diagram for shutting off the air supply of the pneumatic microvalve according to FIG.

2B is a second operation diagram of opening the air supply of the pneumatic microvalve according to FIG.

Figure 3a is a first view of a protection circuit means according to an embodiment of the present invention,

FIG. 3B is a second circuit diagram showing the protection circuit means according to another embodiment of the present invention. FIG.

Description of the Related Art

10: first body 11: bobbin

12: Coil

20: Flanger 201: Elastic means

21: Stator

30: second body 31: air intake port

32: air outlet port 33: residual pressure air outlet port

40: a flow path connector 41: a vent hole

50: Poppet 60: Protection circuit means

70: Power supply

100: air pressure microvalve

Claims (6)

A first body 10 in which a bobbin 11 wound with a coil 12 is embedded along an axial direction; A stator (21) and a flange (20) that are installed in the bobbin (11) in the interior; A second body 30 which is provided at an end of the first body 10 and has a plurality of air ports 31, 32, 33 formed along the width direction thereof; A flow path connector (40) fixed to a central portion of the second body (30) and communicating with a plurality of air ports (31, 32, 33); And a poppet (50) interlocked with the flow path connector (40) so as to intermittently control the air ports (31, 32, 33) of the second body (30) The stator 21 and the flange 20 have a ratio of 4: 6 in order to maximize the suction force and have a protection circuit means 60 for suppressing the surge current at the moment of power supply, The protection circuit means 60 supplies the minimum power so as to form a minimum magnetic force for operation so as to improve the operation response speed of the flange 20 with respect to the stator 21 and to reduce power consumption Pressure micro-valve. The method according to claim 1, The air ports 31, 32 and 33 are communicated with an air intake port 31 which is closed by the rise of the poppet 50 and an air intake port 31 which is opened by the fall of the poppet 50 An air discharge port (32), and a residual pressure air discharge port (33) for discharging an internal residual pressure when the poppet (50) is lifted or lowered. The method according to claim 1, Wherein the vent hole (40) is further formed with a vent hole (41) through which the remaining air can be discharged to the residual pressure air exhaust port (33) as the poppet (50) ascends and descends. The method according to claim 1, Wherein the flange (20) is elastically restored so that the elastic means (201) is tacked on the outer peripheral surface of the end portion. delete The method according to claim 1, Wherein the minimum power is 0.1 watt.

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