KR101991958B1 - A valve apparatus - Google Patents

Abstract

The present invention relates to a valve device. Valve device according to one aspect, the cylinder forming a flow space of the fluid; An inlet provided at one side of the cylinder to allow fluid to flow into the cylinder; A discharge mechanism having a plurality of holes for discharging the fluid introduced into the cylinder; A piston in which at least a portion is accommodated in the cylinder; A driving unit connected to one side of the piston and providing a driving force to the piston; A damper portion coupled to the piston and selectively opening one discharge portion of the plurality of holes; And a pressurizing mechanism for pressurizing the damper part toward the discharge mechanism.

Description

Valve device {A valve apparatus}

The present invention relates to a valve device.

In general, the valve device is a device for controlling the amount or pressure of the fluid, is configured to change the flow direction of the fluid or to control the flow rate. The valve device includes a four-way valve capable of guiding the discharge direction of the fluid introduced into the device in one direction or the other direction.

In one example, the four-way valve can be used in an air conditioner. The four-way valve is provided on the discharge side of the extruder constituting the air conditioner and configured to change the flow direction of the refrigerant.

In detail, the air conditioner includes a compressor, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger constituting a refrigerant cycle. According to an operation mode of the air conditioner, that is, a cooling or heating operation mode, the refrigerant compressed in the compressor may flow into the outdoor heat exchanger or the indoor heat exchanger.

Therefore, based on the operation mode, the refrigerant discharged from the compressor may be diverted from the inlet side of the outdoor heat exchanger to the inlet side of the indoor heat exchanger or to the inlet side of the indoor heat exchanger to the inlet side of the indoor heat exchanger. There is a need. At this time, the four-way valve is provided on the discharge side of the compressor, it is possible to switch the flow direction of the refrigerant.

The four-way valve includes a housing, a piston slidably provided in the housing to adjust a flow path, and a plurality of discharge parts selectively opened or closed by the piston. The piston may be driven by a piston drive, such as a solenoid.

According to the conventional four-way valve, a gap is generated between the piston and the housing having the plurality of discharge parts by the flow of the refrigerant in a state where the movement of the piston is completed (the lifting of the piston), so that the refrigerant leaks into the gap. there is a problem.

An object of the present invention is to provide a valve device in which a refrigerant is prevented from leaking into regions other than the refrigerant passage.

Valve device according to one aspect, the cylinder forming a flow space of the fluid; An inlet provided at one side of the cylinder to allow fluid to flow into the cylinder; A discharge mechanism having a plurality of holes for discharging the fluid introduced into the cylinder; A piston in which at least a portion is accommodated in the cylinder; A driving unit connected to one side of the piston and providing a driving force to the piston; A damper portion coupled to the piston and selectively opening one discharge portion of the plurality of holes; And a pressurizing mechanism for pressurizing the damper part toward the discharge mechanism.

According to the proposed invention, there is an effect that the structure of the valve device is simple and easy to assemble. In particular, since the plurality of discharge portions act to selectively open and close during the process of integrally moving the piston and the damper portion, there is an advantage that a separate pipe for moving the fluid is not required.

In addition, since a separate pipe or the like for which the pressure of the fluid is applied is not required, there is an effect that the flow path loss or the like that may occur while the fluid moves the pipe or the like can be reduced.

In addition, the piston and the damper portion is provided in one cylinder, and the damper portion is configured to selectively shield the discharge portion of the cylinder side, there is an advantage that the overall size of the valve device can be miniaturized.

In addition, since the damping of the damper portion is prevented by the pressurizing mechanism, the refrigerant may leak out between the damper portion and the discharge mechanism or the refrigerant may be prevented from flowing between the damper portion and the discharge mechanism.

In addition, since the damper portion is disposed inside the inflow portion and the damper portion is formed with a guide surface to easily guide the fluid toward the discharge portion, there is an effect of reducing the flow resistance of the fluid.

In addition, there is an advantage that the simple structure and operation of the valve device can reduce the possibility of failure of the device and improve the reliability of the operation of the device.

1 is a perspective view of a valve device according to a first embodiment of the present invention.
2 and 3 are views of some components of the valve device according to the first embodiment of the present invention.
4 is a cross-sectional view taken along AA of FIG. 1.
5 is a view showing the bottom configuration of the damper unit according to the first embodiment of the present invention.
Figure 6 is an exploded view showing the configuration of the drive unit according to the first embodiment of the present invention.
7 is a cross-sectional view taken along the line BB of FIG. 6.
8 is a block diagram showing a configuration of a valve device according to a first embodiment of the present invention.
9 is a view showing the operation of the drive unit according to the first embodiment of the present invention.
10 and 11 are cross-sectional views showing the operation of the valve device according to the first embodiment of the present invention.
12 is a cross-sectional view of a valve device according to a second embodiment of the present invention.
13 is a cross-sectional view of a valve device according to a third embodiment of the present invention.

Hereinafter, with reference to the drawings will be described a specific embodiment of the present invention.

1 is a perspective view of a valve device according to a first embodiment of the present invention.

Referring to FIG. 1, the valve device 100 according to the first embodiment of the present invention may be a four-way valve.

In detail, the valve device 100 includes a cylinder 110 having a substantially cylindrical main body 111 and forming a flow space of a fluid, and provided on one side of the cylinder 110 and of the cylinder 110. It may include an inlet 112 for introducing fluid into the inside and a plurality of discharge parts 115, 116, and 117 provided at the other side of the cylinder 110 and for discharging the fluid in the cylinder 110.

The plurality of discharge parts 115, 116, and 117 may be arranged on the lower surface of the cylinder 110 to be spaced apart from each other, and may include a first discharge part 115, a second discharge part 116 and a third discharge part ( 117).

The singer valve device 100 may further include a driving unit 170 coupled to the cylinder 110 and providing a driving force for the movement of the piston 190 (see FIG. 2). Hereinafter, the configurations of the cylinder 110 and the driving unit 170 will be described in detail with reference to the drawings.

2 and 3 are views of a partial configuration of the valve device according to the first embodiment of the present invention, Figure 4 is a cross-sectional view taken along the AA of Figure 1, Figure 5 is a first embodiment of the present invention Figure is a view showing the bottom configuration of the damper portion.

2 shows the internal structure of the cylinder 110 by removing the main body 111, and FIG. 3 shows a state in which the damper part 130 is removed in FIG.

2 to 5, the valve device 100 according to the embodiment of the present invention includes a driving unit 170, a piston 190 and the piston 190 which are provided to be movable by the driving unit 170. And a damper part 130 moving together with the piston 190 and selectively opening at least some of the discharge parts of the plurality of discharge parts 115, 116, and 117.

The driving unit 170 is spaced apart from the piston 190 and has a core 200 having an electromagnet 205 that is magnetic when an electric current is applied, and between the core 200 and the piston 190. It may be provided to the elastic member 210 and the piston 190 to elastically support the piston 190, and may include a sleeve 180 for guiding the movement of the piston 190.

One end of the elastic member 210 may be supported by the core 200, and the other end thereof may be supported by an end of the piston 190. For example, the elastic member 210 may be a compression spring.

When the electromagnet 205 has magnetic properties, the attraction force acts on the piston 190 in a direction closer to the electromagnet 205. To this end, at least a portion of the piston 190, for example, an end portion of the piston 190 may be formed of a material that works with the electromagnet 205.

On the other hand, when the electromagnet 205 loses its magnetic force, the attraction force does not work, and the piston 190 moves away from the electromagnet 205 by the restoring force of the elastic member 210.

The sleeve 180 has a hollow cylindrical shape. In detail, one end of the sleeve 180 is coupled to one end of the cylinder 110, and the core 200 is coupled to the other end.

In addition, the elastic member 210 is disposed in the sleeve 180, and a space for the movement of the piston 190 is formed.

At least a portion of the piston 190 may be located inside the cylinder 110, and the remaining portion may be located inside the sleeve 180. In addition, the piston 190 is moved in the horizontal direction according to the action of the drive unit 170, in this process the length of the piston 190 located in the cylinder 110 is changed.

On one side of the piston 190, a piston coupling portion 125 for coupling the piston 190 and the damper portion 130 is provided. The piston coupling part 125 may be located inside the cylinder 110 and may be coupled to one side surface of the damper part 130.

In detail, the piston coupling portion 125 is formed between the plurality of insertion portions 127 and the plurality of insertion portions 127 inserted into the first grooves (see 192 of FIG. 6) of the piston 190. The second groove 126 is formed to receive at least a portion of the piston 190.

The first groove (see 192 of FIG. 6) is understood as a cutting groove recessed inward from the outer circumferential surface of the piston 190, and the second groove 126 is downward from the upper end of the piston engaging portion 125. It is understood as an incision groove which is incision into.

In addition, the piston 190 may rotate in a state in which the piston 190 is coupled to the piston coupling part 125.

An opening 128 through which the refrigerant inside the cylinder may pass may be formed in the piston coupling part 125 when the piston coupling part 125 moves in the horizontal direction. As the opening 128 is formed in the piston coupling portion 125, the resistance of the fluid acting on the piston coupling portion 125 may be reduced as the fluid inside the cylinder passes through the opening 128. have.

The damper unit 130 may include a damper body 131 formed in a substantially plate shape. The damper body 131 may include a flow path guide 134 for guiding the flow of the fluid and an opening 135 through which the fluid passes.

The damper main body 131 is disposed to be movable above the discharge mechanism 140.

The discharge mechanism 140 is connected to the plurality of discharge parts 115, 116, and 117. For example, the discharge parts 115, 116, and 117 may be provided in three, as shown in FIG. 3. In addition, the discharge mechanism 140 is disposed between the plurality of discharge parts 115, 116, and 117 and the damper part 130.

The discharge mechanism 140 may be integrally formed with or coupled to the cylinder.

In detail, the discharge mechanism 140 includes a plurality of coupling bodies 141 coupled to upper sides of the plurality of discharge units 115, 116, and 117 and at least a portion of the coupling bodies 141 penetrating through the discharge mechanisms 140. It may include through holes 142, 143, and 144.

The plurality of through holes 142, 143, and 144 may include a first hole 142, a second hole 143, and a third hole disposed corresponding to the plurality of discharge parts 115, 116, and 117, respectively. 144). The first to third holes 142, 143, and 144 are formed in the same size and are spaced apart from each other in a horizontal direction, that is, in a direction in which the piston 190 and the damper part 130 move.

The fluid inside the cylinder 110 may flow through one of the plurality of through holes 142, 143, and 144, and may be discharged through a discharge part corresponding to the one hole.

The flow guide 134 connects two through holes of the three through holes 142, 143, and 144. In addition, the opening 135 may be selectively communicated with the third through hole 144.

The holes corresponding to the flow path guide 134 and the opening 135 of the three through holes 142, 143, and 144 may be different from each other according to the movement position of the damper part 130.

The damper part 130 may include a shielding part 132 protruding upward of the damper main body 131.

The flow guide 134 is formed in the shield 132. For example, when the flow guide 134 is positioned above the first hole 142 and the second hole 143, the fluid in the cylinder 110 may pass through the first and second holes 142 and 143. You will not be able to pass.

On the upper surface of the shield 132, a guide surface 133 is formed to be inclined downward. For example, the guide surface 133 may be formed to be rounded at a predetermined curvature from the top to the bottom of the shielding portion 132 adjacent to the inflow portion 11.

When the fluid is introduced into the cylinder 110 through the inlet 112, the fluid is guided downward along the guide surface 133. In addition, the fluid may flow to one of the discharge parts 115, 116, and 117 through an open one of the first to third holes 142, 143, and 144. In this way, the guide surface 133 is configured, the fluid can be easily guided to the one discharge portion in the cylinder (110).

On the upper surface of the shield 132 is a receiving portion 137 for receiving the elastic member 138, and the ball 139 is elastically supported upward by the elastic member 138 accommodated in the receiving portion 137 It may be provided.

The ball 139 supported by the elastic member 138 contacts the inner surface of the cylinder 110. At this time, the ball 139 is a reaction of the pressing force for pressing the inner surface (inner upper surface) of the cylinder 110, the cylinder 110 is to press the ball 139. Accordingly, the damper part 130 is pressed toward the discharge mechanism 140 inside the cylinder 110, so that a gap does not occur between the damper part 130 and the discharge mechanism 140, thereby allowing the fluid to Leakage between the damper unit 130 and the discharge mechanism 140 can be prevented. Alternatively, the fluid may be prevented from flowing between the damper unit 130 and the discharge mechanism 140. That is, according to the present invention, the flow of the refrigerant between the damper unit 130 and the discharge mechanism 140 can be prevented.

In addition, since the ball 139 may be rotated in contact with the inner surface of the cylinder 110, the damper 130 may move smoothly in the horizontal direction.

In the present embodiment, the elastic member 138 and the ball 139, the pressing mechanism for pressing the damper 130 toward the discharge mechanism 140 and at the same time as the pressure mechanism for guiding the movement of the damper 130 can do.

On the other hand, on one side of the damper body 131, a coupling surface 136 coupled to the piston coupling portion 125 is formed. The damper unit 130 is coupled to the piston coupling unit 125 at the coupling surface 136 by a predetermined coupling method.

Therefore, when the piston coupling portion 126 moves in one direction, the damper portion 130 moves together with the piston coupling portion 125. In summary, the piston 190, the piston coupling portion 125 and the damper portion 130 may be integrally formed by a predetermined coupling structure, the piston coupling portion 125 in accordance with the movement of the piston 190 ) And the damper unit 130 may move together with the piston 190.

6 is an exploded view showing the configuration of the driving unit according to the first embodiment of the present invention, Figure 7 is a cross-sectional view taken along the line B-B of FIG.

6 and 7, the piston 190 is formed in a cylindrical shape, and the first groove 192 is formed at one end thereof as described above. A plurality of protrusions 193 are formed at the other end of the piston 190. The plurality of protrusions 193 are spaced apart in the circumferential direction.

The plurality of protrusions 193 may include a first slope 194 formed on the left side of FIG. 6 and a second slope 195 formed on the right side of FIG. 6.

The first slope 194 and the second slope 195 are inclined in a direction approaching each other. Therefore, the plurality of protrusions 193 may be formed in a trapezoidal shape as an example. The inclination angles of the first slope 194 and the second slope 195 may be the same.

A plurality of guides 182 are formed on the inner circumferential surface of the sleeve 180 spaced apart in the circumferential direction. For example, the plurality of guides 182 may be elongated in the central axis direction (left and right directions in FIG. 6) of the sleeve 180. In this case, the plurality of guides 182 extend from one end (eg, the left end in FIG. 6) of the sleeve 180 toward the right end of the sleeve 180. At this time, the length of the plurality of guides 182 is formed shorter than the entire length of the sleeve 180.

Since the plurality of guides 182 are spaced apart in the circumferential direction of the sleeve 180, a path 181 through which the protrusions 193 of the piston 190 may move may be formed between two adjacent guides 182. do. In this case, the number of the paths 181 is the same as the number of the plurality of protrusions 193.

Each guide 182 is provided with a locking groove 183 and the second sleeve inclined surface 186 for catching the protrusion 193 of the piston 190. The locking groove 183 may include a first sleeve inclined surface 184 that is inclined at the same angle as the first inclined surface 194 of the protrusion 193, and a contact surface 185 that is parallel to the central axis direction of the sleeve 180. It may include. The first sleeve inclined surface 184 and the second sleeve inclined surface 186 are inclined in the same direction.

Therefore, when the protrusion of the piston 190 is inserted into the locking groove 183, the piston 190 is no longer moved in a state that is elastically supported by the elastic member 210.

At one end of the core 200, a plurality of contact protrusions 202 may be formed to contact the protrusion 193 of the piston 190.

The plurality of contact protrusions 202 may be spaced apart in the circumferential direction of the core 200. Each of the contact protrusions 202 has a core inclined surface 203 which is inclined at the same angle as the second inclined surface 195 of the protrusion 193 of the piston 190, and a central axis direction of the core 200 (FIG. 6). In the left and right direction) it may include a contact surface 204 parallel to.

The lengths of the inclined surfaces 194 and 195 of the protrusion 193 of the piston 190 are shorter than the lengths of the first sleeve inclined surface 184 and the core inclined surface 203. Thus, the first inclined surface 194 may slide along the first sleeve inclined surface 184 while the first inclined surface 194 is in contact with the first sleeve inclined surface 184. In addition, the second inclined surface 195 may slide along the core inclined surface 206 while the second inclined surface 195 is in contact with the core inclined surface 203.

8 is a block diagram showing a configuration of a valve device according to a first embodiment of the present invention, Figure 9 is a view showing the operation of the drive unit according to the first embodiment of the present invention, Figures 10 and 11 the present invention A cross-sectional view showing the action of the valve device according to the first embodiment of the present invention.

FIG. 9A shows an operating state of the drive unit when the drive unit is on, and FIG. 9B shows an operating state of the drive unit when the drive unit is off, and FIG. 9C shows a drive unit. Is a view showing the operating state of the drive unit when the on again. 9 illustrates a state in which the sleeve and the core are deployed in a plane for easy understanding.

First, referring to FIG. 8, the valve device 100 according to the embodiment of the present invention may include a power supply unit 220 and the power supply unit 220 to generate magnetic properties by selectively applying a current to the electromagnet 205. It may include a control unit 220 for controlling the operation of the).

The power supply unit 220 may be a switching member that is controlled on / off. When the power supply unit 220 is turned on, magnetism is generated in the electromagnet 205 and the piston 190 moves toward the electromagnet 205 by the attraction force of the electromagnet 205.

On the other hand, when the power supply unit 220 is off, the magnetism and attraction of the electromagnet 205 is extinguished, the piston 190 is away from the electromagnet 205 by the restoring force of the elastic member 210 Is moved to.

Hereinafter, the operation of the valve device according to the embodiment of the present invention will be described.

First, in FIG. 9, end portions of the sleeve inclined surfaces 184 and 186 are disposed at positions corresponding to approximately intermediate portions of the core inclined surface 203. That is, in FIG. 9A, the imaginary line L extending in the horizontal direction at the ends of the sleeve inclined surfaces 184 and 186 passes through the middle portion of the core inclined surface 203.

A portion of the core 200 is inserted into the sleeve 180, and the guide 182 and the core of the sleeve 180 are inserted in the state in which the core 200 is inserted into the sleeve 180. The contact protrusions 202 of the 200 are spaced apart. The reason for this is to allow the protrusion 193 of the piston 190 to move between the guide 182 of the sleeve 180 and the contact protrusion 202.

FIG. 10 shows the operation of the valve device 100 when the power supply 220 is turned on for the first operation mode of the valve device.

9 (a) and 10, when the power supply unit 220 is turned on, the piston 190 moves in a direction closer to the core 200 (the right direction in FIG. 10). At this time, the protrusion 193 of the piston 190 moves along the path 181 of the sleeve 180. When the piston 190 moves to the right side, the second inclined surface 195 of the protrusion 193 of the piston 190 comes into contact with the core inclined surface 203. At this time, the elastic member 210 may be compressed.

In this state, since the power supply unit 220 is turned on, the second inclined surface 195 of the protrusion 193 is slid along the core inclined surface 203 and the piston 190 is rotated at an angle.

Then, the power supply 220 is turned off. Then, the piston 190 moves in a direction away from the core 200 (the left direction in FIG. 10) by the restoring force of the elastic member 210. When the piston 190 moves to the left side, as shown in FIG. 9B, the first inclined surface 194 of the protrusion 193 of the piston 190 is disposed on the first sleeve inclined surface 184. Contact. In this state, since the piston 190 continuously receives elastic force from the elastic member 210, the first inclined surface 194 slides along the first sleeve inclined surface 184, and the piston 190 is Rotated by a certain angle.

When the protrusion 193 of the piston 190 comes into contact with the contact surface 185 while the first inclined surface 194 slides along the first sleeve inclined surface 184, the piston 190 is no longer in contact with the contact surface 185. You will not be able to move to the left.

When the movement of the piston 190 is arranged in the first operation mode, the piston 190 moves to the right side when the power supply 220 is turned on, and then the power supply 220 is turned off. It stops after moving a certain distance to the left by the elastic force of the member 210.

When the piston 190 is moved, the piston coupling portion 125 and the damper portion 130 moves together with the piston 190 in the right direction, and stops after moving a certain distance in the left direction. When the movement of the damper part 130 is completed, the flow guide 134 is positioned above the second discharge part 116 and the third discharge part 117, and thus the second discharge part ( 116 and the third discharge part 117 is closed by the shield 132.

As a result, the fluid introduced into the main body 111 through the inlet 112 is discharged to the first discharge unit 115 located below the inlet 112.

On the other hand, Figure 11 shows the action of the valve device 100 when the power supply 220 is turned on again for the second operation mode of the valve device.

Referring to FIGS. 9C and 11, when the power supply unit 220 is turned on again, the piston 190 moves in a direction closer to the core 200. When the piston 190 moves to the right side, the second inclined surface 195 of the protrusion 193 of the piston 190 comes into contact with the core inclined surface 203 again.

At this time, the contact protrusion which the protrusion part of the said piston contacts in FIG. 9 (c) is different from the contact protrusion which the protrusion part of the said piston contacts in FIG. In FIG. 9C, the contact protrusion that the protrusion of the piston contacts is a protrusion located after the contact protrusion that the protrusion of the piston contacts in FIG. 9A.

After the second inclined surface 195 of the protrusion 190 contacts the core inclined surface 203, the second inclined surface 195 slides along the core inclined surface 203, and the piston 190 is fixed. The angle is rotated. Then, when the power supply unit 220 is off, the piston 190 is moved to the left direction by the elastic force of the elastic member 210.

When the piston 190 moves in the left direction, the first inclined surface 194 of the protrusion 193 comes into contact with the second sleeve inclined surface 186. Then, the first inclined surface 194 slides along the second sleeve inclined surface 186. The protrusion 193 is positioned on the path 181 of the sleeve 180 while the first inclined surface 194 is slid along the second sleeve inclined surface 186. Then, the protrusion 193 finally moves to the left along the path 181.

When the movement of the piston 190 in the second operation mode is summarized, the piston 190 is moved to the right by a certain distance when the power supply 220 is turned on, and then the power supply 220 is turned off. After moving to the left by the elastic force of the elastic member 210 is stopped.

When the piston 190 is moved to the left side, the piston coupling portion 125 and the damper unit 130 moves together with the piston 190 in the left direction. In addition, when the damper part 130 is moved, the flow guide 134 is located above the first discharge part 115 and the second discharge part 116, and thus the first discharge part 115. And the second discharge part 116 is closed by the shielding part 132.

As a result, the fluid introduced into the main body 111 flows to the right along the guide surface 133 and is discharged to the open third discharge part 117. At this time, since the guide surface 133 is formed to be rounded downward with a predetermined curvature, the fluid can be easily guided to the third discharge part 117 side.

According to the present embodiment as described above, it is not necessary to continuously turn on the power supply unit 220 when switching the flow path of the valve device, and after turning off for a predetermined time, the advantage that the power consumption of the driving unit 170 is reduced. have. At this time, the on time of the power supply unit 220 is a time required until the piston 190 moves to contact the core 200.

In addition, there is an advantage that the internal structure of the valve device is simple, so there is little fear of failure, and the reliability of the operation of the device can be improved.

12 is a cross-sectional view of a valve device according to a second embodiment of the present invention.

The second embodiment of the present invention is the same as the first embodiment in other parts, except that there is a difference in the pressure mechanism. Therefore, hereinafter, only characteristic parts of the second embodiment of the present invention will be described.

Referring to FIG. 12, the pressing mechanism 300 according to the second embodiment of the present invention includes an accommodating part 310 formed on an inner surface of the main body 110 and an elastic member accommodated in the accommodating part 310. And a ball 320 elastically supported downward by the elastic member 320.

The ball 330 supported by the elastic member 320 contacts the upper surface of the damper unit 130 to press the damper unit 130 downward. Accordingly, the damper part 130 is pressed toward the discharge mechanism 140 inside the cylinder 110, so that a gap does not occur between the damper part 130 and the discharge mechanism 140, thereby allowing the fluid to Flow between the damper 130 and the discharge mechanism 140 can be prevented.

In addition, since the ball 320 may be rotated in contact with the damper unit 130, the damper unit 130 may smoothly move in a horizontal or horizontal direction.

13 is a cross-sectional view of a valve device according to a third embodiment of the present invention.

The third embodiment of the present invention is the same as the first embodiment in other parts, except that there is a difference in the pressure mechanism. Therefore, hereinafter, only characteristic parts of the third embodiment of the present invention will be described.

Referring to FIG. 13, the pressure mechanism 400 according to the third embodiment of the present invention may include one or more elastic members 411 installed on an inner surface of the main body 111 and elastic forces of the elastic members 411. A first guide part 413, at least one ball 415 provided in the first guide 413, and a second guide part contacting the ball 415 and provided in the damper part 420 ( 420.

A part of the ball 415 may be accommodated in the first guide part 413. That is, the first guide portion 413 may be formed with a receiving groove of a shape corresponding to the ball 415. Therefore, the ball 415 may be rotated in a state accommodated in the first guide portion 413.

The ball 415 contacts the upper surface of the second guide part 420 so that the ball 415 may receive the elastic force of the elastic member 411 to pressurize the second guide part 420.

On the upper surface of the second guide portion 420 is formed a guide groove (not shown) that can accommodate a portion of the ball 415 so that the horizontal or horizontal movement of the second guide portion 420 smoothly Can be. At this time, the guide groove is long in the direction parallel to the direction of movement of the damper unit 130 to prevent the ball 415 and the damper unit 130 from interfering when the damper unit 130 moves. Can be formed. Therefore, the ball 415 is rotated in the state accommodated in the first guide portion 411, the damper 130 is moved in the horizontal direction with the second guide portion 420.

In the above embodiment, the elastic member 411 is disposed between the main body 111 and the first guide portion 413 to support the first guide portion 413 elastically, but the damper is differently The elastic member 411 is fixed to the part 130, and the second guide part 413 may be connected to the elastic member 411. In this case, the first guide part 413 may be fixed or integrally formed on an inner surface of the main body 111.

As another example, the ball 415 may be horizontally moved together with the second guide part 420 while being accommodated in the second guide part 420 to rotate.

According to the present embodiment, the damper part 130 is pressed toward the discharge mechanism 140 inside the cylinder 110, so that a gap does not occur between the damper part 130 and the discharge mechanism 140. The fluid may be prevented from flowing between the damper unit 130 and the discharge mechanism 140.

100: valve unit 110: cylinder
130: damper unit 170: drive unit
180: sleeve 190: piston
200: core

Claims (12)

A cylinder forming a flow space of the fluid;
An inlet provided at one side of the cylinder to allow fluid to flow into the cylinder;
A discharge mechanism having a plurality of holes for discharging the fluid introduced into the cylinder;
A piston in which at least a portion is accommodated in the cylinder;
A driving unit connected to one side of the piston and providing a driving force to the piston;
A damper portion coupled to the piston and selectively opening one discharge portion of the plurality of holes;
A pressing mechanism for pressing the damper portion toward the discharge mechanism side; And
A piston coupling portion for coupling the piston and the damper portion,
The piston coupling portion, the valve device is formed with an opening through which the refrigerant in the cylinder can pass. The method of claim 1,
The damper unit may include a shield that shields some of the plurality of holes; And
And a damper body provided at one side of the shield and disposed to correspond to the remaining one of the plurality of holes to allow fluid to pass therethrough. The method of claim 2,
The shield is disposed below the inlet,
The upper surface of the shield is a valve device, characterized in that inclined rounded downward. The method of claim 1,
The piston coupling portion, the valve device including a plurality of inserts that are inserted into the first groove of the piston. The method of claim 4, wherein
The piston coupling portion,
And a second groove formed between the plurality of inserts to allow at least a portion of the piston to be inserted. delete The method of claim 1,
The damper unit valve device including an opening for passing the refrigerant in the cylinder. The method of claim 1,
The pressing mechanism includes a ball contacting the damper portion, and a valve device including an elastic member for elastically supporting the ball toward the damper portion. The method of claim 1,
The pressing mechanism includes a ball contacting the cylinder and an elastic member for pressing the ball toward the cylinder. The method of claim 1,
The pressing mechanism, the ball,
A first guide part in contact with the ball and connected to the cylinder;
A second guide part in contact with the ball and connected to the damper part;
Valve device including an elastic member for pressing any one of the first guide portion and the second guide portion. The method of claim 10,
The valve device of any one of the first guide portion and the second guide portion is formed with a receiving groove formed in a shape corresponding to the ball so that the ball is rotated. A cylinder forming a flow space of the fluid;
An inlet provided at one side of the cylinder to allow fluid to flow into the cylinder;
A discharge mechanism having a plurality of holes for discharging the fluid introduced into the cylinder;
A piston in which at least a portion is accommodated in the cylinder;
A driving unit connected to one side of the piston and providing a driving force to the piston;
A damper portion coupled to the piston and selectively opening one discharge portion of the plurality of holes;
A pressing mechanism for pressing the damper portion toward the discharge mechanism side; And
A piston coupling portion for coupling the piston and the damper portion,
The piston includes a first groove which is formed recessed in the inner direction from the outer peripheral surface,
The piston coupling portion, the valve device including a second groove formed by cutting downward from the upper end of the piston coupling portion so that at least a portion of the first groove is inserted.

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