KR101298722B1 - Control valve of variable displacement compressor - Google Patents

Abstract

PURPOSE: A control valve for a variable capacity compressor is provided with a reduced volume as a bellows is installed in an operating unit body. CONSTITUTION: A control valve for a variable capacity compressor comprises an operating unit (100) and a driving unit (200). The operating unit controls the pressure of a crank chamber. The driving unit is connected to one side of the operating unit, and drives the operating unit. The operating comprises a body, a valve, and a bellows. One side of the body is connected to the operating unit. The valve moves straight by the operating unit, and connects a first port to a third port. The bellows controls the connection degree of the first port with the third port by adjusting the opening degree of the third port.

Description

Control Valve for Variable Capacity Compressor {CONTROL VALVE OF VARIABLE DISPLACEMENT COMPRESSOR}

The present invention relates to a control valve installed in a variable displacement compressor of a vehicle air conditioner to control the capacity of the variable displacement compressor.

The clutchless compressor used in the vehicle air conditioner is driven by the engine. However, if the operation of the compressor is limited by the engine speed, the capacity of the compressor is also affected by the engine speed. Then, since the cooling capacity of the vehicle is determined by the rotational speed of the engine, great difficulty arises in controlling the cooling capacity.

In order to overcome this problem, a variable capacity compressor has been developed and used to obtain a proper cooling capacity by varying the discharge capacity of the refrigerant without being limited by the rotational speed of the engine.

In general, the variable displacement compressor includes an airtight crank chamber and an inclined plate installed in the crank chamber and rotated by the rotating shaft of the engine. During driving of the variable displacement compressor, the inclination angle of the inclined plate with respect to the rotating shaft is variable. When the inclined plate is rotated in an inclined state, the inclined plate is oscillated, and the piston connected to the inclined plate is linearly moved by the rotation and oscillation of the inclined plate to compress the refrigerant introduced from the suction chamber communicating with the evaporator side. Then, it discharges to the discharge chamber in communication with the condenser side.

The inclination angle of the inclination plate is changed according to the pressure change of the crank chamber, and the discharge amount of the refrigerant is changed in accordance with the inclination angle of the inclination plate. That is, when the inclination angle of the inclined plate is large, the stroke of the piston is long, so that the amount of refrigerant is discharged. When the inclination angle of the inclination plate is small, the stroke of the piston is short, and the amount of refrigerant is discharged.

In order to adjust the amount of refrigerant discharged as described above, it is a control valve for the variable displacement compressor that the pressure of the crankcase of the variable displacement compressor is changed.

A conventional capacity control valve disclosed in Korean Patent Publication No. 933830 will be described.

The conventional displacement control valve includes a valve portion 15 and a solenoid portion 40, and one side of the valve portion 15 and one side of the solenoid portion 40 are in contact with each other. Thus, the valve portion 15 is operated by the solenoid portion 40 to vary the pressure of the crankcase of the variable displacement compressor.

However, the conventional capacity control valve as described above has a disadvantage in that the bellows 22A of the pressure reducing element 22 is installed inside the other side of the valve portion 15, so that it is relatively bulky.

In detail, one side portion of the valve portion 15 coupled to the solenoid portion 40 has a larger diameter than the other side portion due to its structure. By the way, since the bellows 22A is provided inside the other part of the valve part 15, the diameter of the other part of the valve part 15 also becomes large, and the volume of the capacity control valve has a disadvantage.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a control valve for a variable capacity compressor that can reduce the overall volume by installing a bellows inside the large diameter portion of the valve portion In providing.

Control valve for a variable displacement compressor according to the present invention for achieving the above object, the first port in communication with the crank chamber of the variable displacement compressor, the second in communication with the suction chamber of the variable displacement compressor and the first port is in communication with or blocked An operation unit configured to communicate with a discharge chamber of the port and the variable displacement compressor and to communicate with or block the first port, and to control the pressure of the crank chamber; A control valve for a variable displacement compressor including a drive unit coupled to one side of the operating unit to drive the operating unit, wherein the operating unit includes a body in which the first port to the third port are formed and one side is coupled to the driving unit. ); A valve installed in the body while being concentric with the body and communicating or blocking the first port and the third port while linearly reciprocating by the driving unit; It is installed inside one side of the valve adjacent to the drive unit communicates or blocks the first port and the second port, and moves the valve while being stretched in accordance with the pressure change of the suction chamber of the third port And a bellows for controlling the degree of communication between the first port and the third port by adjusting the opening and closing degree.

The control valve for the variable displacement compressor according to the present invention has an effect of reducing the volume of the control valve for the variable displacement compressor because a bellows is installed inside the body of the operating part having a relatively large diameter connected to the driving unit side.

When the variable capacity compressor of the vehicle air conditioner is driven, the suction chamber side and the crank chamber side of the variable capacity compressor of the vehicle air conditioner are also communicated with each other via the control valve for the variable capacity compressor, so that the pressure in the crank chamber is rapidly lowered. Then, since the inclination angle of the inclined plate provided in the crank chamber is quickly increased, there is an effect that the operation delay of the variable displacement compressor of the vehicle air conditioner is prevented.

1 is a perspective view of a control valve for a variable displacement compressor according to an embodiment of the present invention.
Fig. 2 is an exploded perspective view of Fig. 1; Fig.
3 is a perspective view of FIG. 2 seen in a right direction;
4 is a cross-sectional view of the body shown in FIG. 2, (a) is a "V-IV" line cross-sectional view, and (b) is a "V-V" line cross-sectional view.
5 is a cross-sectional view of a control valve for a variable displacement compressor according to an embodiment of the present invention, (a) is a cross-sectional view taken along the line "II-II" of FIG. 1, and (b) is a cross-sectional view taken along the line "III-III" of FIG. .
6 and 7 are cross-sectional views illustrating the operation of a control valve for a variable displacement compressor according to an embodiment of the present invention, and FIGS. 6 and 7 (a) and (b) are FIGS. An enlarged cross-sectional view of the operating section corresponding to (b).

DETAILED DESCRIPTION OF THE INVENTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views, and length and area, thickness, and the like may be exaggerated for convenience.

Hereinafter, a control valve for a variable displacement compressor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a control valve for a variable displacement compressor according to an embodiment of the present invention.

As shown, the control valve for a variable displacement compressor according to an embodiment of the present invention includes an operating unit 100 and a driving unit 200 coupled to each other, and is installed in a variable capacity compressor (not shown).

The operation unit 100 is a crank chamber (hereinafter referred to as a "crank chamber") of the variable displacement compressor in which the rotating shaft (not shown) side of the engine of the vehicle is communicated with the variable displacement compressor in communication with the evaporator side of the vehicle air conditioner. And the discharge chamber (hereinafter referred to as 'discharge chamber') of the variable displacement compressor in communication with the suction chamber (hereinafter referred to as 'suction chamber') and the condenser side of the vehicle air conditioner, Adjust.

The crank chamber is provided with an inclined plate (not shown) that rotates by the rotation shaft of the engine of the vehicle, and the inclined plate is provided with a variable inclination angle with respect to the rotation shaft in accordance with the pressure change of the crank chamber. The operation unit 100 controls the inclination angle of the inclined plate by adjusting the pressure of the crank chamber.

A plurality of pistons (not shown) are connected to the inclined plate. If the inclination angle of the inclination plate is large, the stroke of the piston is long due to the inclination plate which rotates and rotates, and the ejection amount of the refrigerant is large.

The driving unit 200 operates the operation unit 100 when power is supplied.

The operation unit 100 will be described with reference to FIGS. 2 to 5. FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is a perspective view of FIG. 2 viewed from the right, and FIG. 4 is a sectional view of the body shown in FIG. 2, (a) is a sectional view taken along the line “IV-IV”, (b ) Is a cross-sectional view taken along the line "V-V", Figure 5 is a cross-sectional view of a control valve for a variable displacement compressor according to an embodiment of the present invention, (a) is a cross-sectional view taken along the line "II-II" of Figure 1, (b) Is a sectional view taken along the line "III-III" in FIG.

As shown, the actuator 100 includes a body 110. The body 110 is formed in a cylindrical shape having a space 110a formed therein, and the right portion diameter is larger than the left portion diameter.

The left end surface side portion of the body 110 is inserted and coupled to the adjustment member 180 to be described later formed with the first port 181 communicating with the crank chamber, and the outer peripheral surface of the large diameter right portion communicating with the suction chamber The second port 112 is formed, and the third port 113 communicating with the discharge chamber is formed on the outer peripheral surface of the left portion having a small diameter.

At this time, the first port 118 and the third port 113 is in communication with the space 110a of the body 110, the second port 112 of the inner peripheral surface of the body 110 and the valve 120 to be described later It communicates with the space between the outer circumferential surfaces. In addition, the third port 113 is opened and closed by a valve 120 to be described later, whereby the first port 181 and the third port 112 are in communication with each other or blocked. In addition, the first port 181 and the second port 112 are mutually communicated or blocked by the bellows 130 to be described later.

Inside the body 110, a valve 120 formed in a shape substantially corresponding to the body 110 and concentric with the body 110 is installed. That is, the valve 120 is also formed in a cylindrical shape in which the right portion diameter is larger than the left portion diameter so that the valve 120 can be linearly moved along the longitudinal direction of the body 110, and the first port 181 is formed inside the valve 120. Communicate with space.

At this time, the right part of the valve 120 is installed inside the right part of the body 110 to have a gap with the inner peripheral surface of the body 110, the left part is installed inside the left part of the body 110 to the body 110 It is sealed with the inner circumferential surface of the. Accordingly, the inside of the valve 120 is always in communication with the first port 181, and the space between the valve 120 and the body 110 is always in communication with the second port 112.

The valve 120 communicates or blocks the first port 181 and the third port 113 while linearly reciprocating by the driving unit 200. In addition, the valve 120 adjusts the opening and closing degree of the third port 113 while linearly reciprocating by the bellows 130 which will be described later, and thus, the first port 181 and the third port 113. Communication is controlled.

The valve 120 is formed of a first valve 121 having a large diameter and a second valve 125 having a small diameter, and the first valve 121 and the second valve 125 are coupled to each other. In this case, the first valve 121 adjacent to the driving unit 200 may be formed of a material that is not affected by the electromagnetic force generated by the driving unit 200.

The bellows 130 is installed inside the right portion of the valve 120, and the bellows 130 is expanded and contracted according to the pressure of the second port 112 communicating with the suction chamber. When the bellows 130 is expanded and contracted in a state where the first port 181 and the second port 112 are blocked, the valve 120 is moved by the bellows 130 to open the third port 113. The degree of communication is adjusted, and thereby the degree of communication between the first port 181 and the third port 113 is adjusted. This will be described later.

The control valve for the variable displacement compressor according to the present embodiment is connected to the driving unit 200 side and the body 110, which is formed with a relatively large diameter because parts such as the plunger 240 of the driving unit 200 are located therein. And the bellows 130 is installed inside the right portion of the valve 120. Therefore, the volume of the control valve for the variable displacement compressor can be reduced.

The stopper 140 is inserted into and coupled to the valve 120. The stopper 140 is coupled to the plunger 240 of the driving unit 200 and inserted and coupled to one side of the valve 120, and moves the valve 120 while moving together with the plunger 240 to close the bellows 130. By moving the expansion and contraction of the valve 120.

The stopper 140 includes a body 141, a spaced protrusion 143 formed on a right side of the body 141 facing the core 230 of the driving unit 200, a press-in hole 145 and a communication hole formed in the body 141. 147.

The body 141 has an outer circumferential surface inserted into and coupled to an inner circumferential surface of the right end surface of the valve 120. The spacer 143 is formed on the right side of the body 141 facing the core 230 of the driving unit 200, and is in contact or non-contact with the core 230. The indentation hole 145 is formed at the center side of the body 141, and the plunger 240 is press-fitted, and a plurality of communication holes 147 are formed at the portion of the body 141 outside the indentation hole 145 to form a valve ( The inside of the 120 and the second port 112 side to communicate.

In detail, since the body 141 is coupled to the plunger 240, when the plunger 240 moves, the body 141 moves, and the valve 120 moves by the body 141. In addition, when the body 141 and the first connection member 150 to be described later are not in contact with each other, the right side surface of the body 141 and the core 230 may communicate with each other so that the first port 181 and the second port 112 side communicate with each other. There should be a gap between). To this end, the spacer 143 is formed on the right side of the body 141.

The first connection member 150 and the second connection member 160 are coupled to the right end surface and the left end surface of the bellows 130, respectively.

The first connection member 150 is in contact with or separated from the stopper 140 as the bellows 130 stretches to block or communicate with the first port 181 and the second port 112, or the stopper 140. The elastic force of the bellows 130 in contact with the transfer to the valve 120 via the stopper 140.

In detail, when the power is supplied to the driving unit 200 and the plunger 240 moves to the left side of the operating unit 100, the stopper 140 moves to the left side. Then, the valve 120 moves by the stopper 140 to block the third port 113, and the left side surface of the body 141 of the stopper 140 contacts the right side surface of the first connection member 150. The inside of the valve 140 that is the first port 181 side and the second port 112 side are blocked.

The right side portion of the first connection member 150 and the left side portion of the body 141 which are in contact with each other are formed to be inclined surfaces 151 and 141a to correspond to each other. As a result, since the contact area between the first connection member 150 and the body 141 is widened, the first connection member 150 and the body 141 are tightly sealed.

The right end of the support shaft 170 is coupled to the second connection member 160 coupled to the left end surface of the bellows 130. The support shaft 170 has a center portion located inside the left portion of the valve 120 to be spaced apart from the inner circumferential surface of the valve 120, and the left portion is placed inside the left portion of the body 110. The support shaft 170 supports the bellows 130 through the second connecting member 160.

The adjusting member 180 is inserted into and coupled to the left end surface side of the body 110, and the right end of the support shaft 170 is coupled to the adjusting member 180. Since the adjusting member 180, the support shaft 170, and the second connection member 160 are sequentially coupled and fixed, the adjustment member 180, the support shaft 170, and the second connecting member 160 are not affected by the expansion and contraction of the bellows 130.

At this time, when the adjustment member 180 is inserted deeply coupled to the inside of the left end surface of the body 110, the bellows 130 is contracted a lot, and when the insertion is shallowly inserted into the left end surface side of the body 110, the bellows ( 130) shrinks less. Since the pressure for stretching the bellows 130 is different depending on the degree of contraction of the bellows 130, if the degree of contraction of the bellows 130 can be adjusted, the bellows 130 can be stretched according to various conditions. The pressure can be adjusted.

Therefore, the adjustment member 180 inserted into the left end surface side of the body 110 is provided to adjust the insertion amount. To this end, teeth (not shown) engaged with each other are formed on the inner peripheral surface of the left end surface side of the body 110 and the outer peripheral surface of the adjustment member 180, respectively. Thus, according to the forward and reverse rotation of the adjustment member 180 to adjust the insertion amount of the adjustment member 180 is inserted into the left end of the body (110).

The first member 181 is formed in plural in the adjusting member 180, and the refrigerant on the crank chamber side flows into the inner space of the right portion of the valve 120 through the first port 181.

An elastic member 135 is installed between the first connection member 150 and the second connection member 160. The elastic member 135 elastically supports the bellows 130 so that the bellows 130 returns to its initial state when the power supplied to the driving unit 200 is cut off.

A plurality of second port 112 and the third port 113 is formed radially with respect to the center of the body 110, respectively. In addition, a ring-shaped recessed communication groove 113a is formed on the inner circumferential surface of the body 110 to communicate the plurality of third ports 113 with each other.

Since a plurality of second ports 112 and third ports 113 are formed radially with respect to the center of the body 110, respectively, the second port 112 and the third port 113 are introduced into the space 110a of the body 110 through the second port 112. The pressure of the refrigerant and the pressure of the refrigerant flowing into the body 110 through the third port 113 act on the valve 120 in a point symmetry with respect to the center of the movement direction of the valve 120. Therefore, the movement of the valve 120 is not affected by the pressure of the refrigerant.

In addition, since the refrigerant flowing into the third port 113 due to the communication groove 113a is stored in the communication groove 113a and discharged into the space of the body 110, the third port 113 is provided through the third port 113. The pressure of the introduced refrigerant does not affect the movement of the valve 120 further.

The driving unit 200 will be described with reference to FIGS. 2, 3, and 5.

As shown, the drive unit 200 includes a housing 210. The coil 220 wound in a cylindrical shape is fixed to the inner circumferential surface of the housing 210, and the cylindrical core 230 is fixed inside the coil 220.

In addition, when power is supplied to the coil 220, the plunger 240 linearly moving to the right side of the operating unit 100 is installed inside the core 230, and the coil 220 is supplied to the coil 220 inside the plunger 240. When the power supply is cut off, the spring 250 is installed to return the plunger 240 to the original state.

The left end side of the core 230 is exposed to the outside of the housing 210, the outer peripheral surface of the right portion of the body 110 of the operation unit 100 is inserted into the inner end surface of the left end of the core 230. Then, the spacer 143 of the stopper 140 of the operation unit 100 is in contact with or non-contact with the left surface of the core 230.

The operation of the control valve for the variable displacement compressor according to the present embodiment configured as described above will be described with reference to FIGS. 5 to 7. 6 and 7 are cross-sectional views illustrating the operation of a control valve for a variable displacement compressor according to an embodiment of the present invention, and FIGS. 6 and 7 (a) and (b) are FIGS. An enlarged cross-sectional view of the operating part corresponding to (b).

As shown in (a) and (b) of FIG. 5, it is assumed that a state in which no power is supplied to the coil 220 of the driving unit 200 is an initial state.

In the initial state, the plunger 240 is elastically supported by the spring 250 and is located on the right side on the driving part 200 side, and the stopper 140 and the valve 120 are also located on the right side by the plunger 240. Thus, the stopper 140 and the first connection member 150 are in contact with each other, and the third port 113 is opened to communicate with the space 110a of the body 110. Therefore, the first port 181 and the second port 112 communicate with each other, and the first port 181 and the third port 113 communicate with each other. The crank chamber and the suction chamber are also communicated with each other via the variable displacement compressor.

In the initial state, the pressure of the crank chamber, the pressure of the suction chamber, and the pressure of the discharge chamber are balanced at a state of about normal pressure, and the inclined plate provided in the crank chamber is substantially perpendicular to the rotation axis. In this state, the inclination angle is minimal.

In the initial state, the switch is turned on to operate the vehicle air conditioner. When the vehicle air conditioner is switched on, the variable capacity compressor of the vehicle air conditioner is driven, whereby the refrigerant in the suction chamber flows into the crank chamber, and the refrigerant introduced into the crank chamber is compressed and discharged into the discharge chamber. At this time, since the refrigerant of the suction chamber flows into the crank chamber, the pressure of the suction chamber is lowered. As described above, since the crank chamber and the suction chamber communicate with each other through the variable displacement compressor, the pressure of the crank chamber is also lowered. When the pressure of the crank chamber is lowered, the inclination angle of the inclined plate installed in the crank chamber is increased, whereby a large amount of refrigerant is compressed and discharged into the discharge chamber by the inclined plate.

Power is supplied to the coil 220 simultaneously with driving the variable displacement compressor of the vehicle air conditioner. Then, as shown in (a) and (b) of FIG. 6, the plunger 240 moves to the left side of the operating part 100 side by the electromagnetic force, and the stopper 140 and the valve ( 120) moves to the left. Then, the third port 113 is blocked by the valve 120, and thus, the first port 181 and the third port 113 are also blocked from each other.

Even when the third port 113 is blocked by the valve 120, the stopper 140 and the first connection member 150 are not in contact with each other. The stopper 140 and the first connection member 150 are in contact with each other when the first port 181 and the second port 112 communicate with each other. Then, the pressure of the crank chamber is discharged to the relatively low pressure suction chamber side through the first port 181 and the second port 112, so that the crank chamber quickly becomes a low pressure. Therefore, since the inclined plate has a large inclination angle more quickly, the vehicle air conditioner is driven without operation delay.

In the state shown in FIG. 6, when the plunger 240 moves further to the left, as shown in FIG. 7, the stopper 140 and the first connection member 150 contact each other, thereby causing the first port 181. ) And the second port 112 are blocked.

In the state shown in FIG. 7 in which the first port 181 and the second port 112 are blocked, when the variable capacity compressor is continuously driven to cool the vehicle to some extent, the refrigerant evaporates in the evaporator of the air conditioner of the vehicle. The amount of is reduced. Then, since the pressure in the suction chamber is reduced, the pressure flowing into the second port 112 and acting on the right side surface of the first connection member 150 is reduced, thereby expanding the bellows 130.

When the bellows 130 expands, the first connecting member 150 moves to the right, and the stopper 140, the valve 120, and the plunger 240 move to the right by the first connecting member 150. Then, the third port 113 is finely opened by the valve 120. When the third port 113 is opened and the first port 181 and the third port 113 communicate with each other, the pressure of the crank chamber is increased, thereby reducing the inclination angle of the inclined plate. Then, the amount of refrigerant compressed and discharged in the discharge chamber is also reduced.

Thereafter, when the vehicle needs more cooling, since the amount of refrigerant evaporated in the evaporator of the air conditioner of the vehicle increases, the pressure in the suction chamber increases, which flows into the second port 112 and is thus connected to the first connection. The pressure acting on the right side of the member 150 also rises. Then, the bellows 130 contracts and the third port 113 is closed while the valve 120 moves due to the contraction of the bellows 130. Then, the pressure of the crank chamber is lowered, thereby increasing the inclination angle of the inclined plate.

As such, the cooling capacity of the variable displacement compressor of the vehicle air conditioner is adjusted by expansion and contraction of the bellows 130. The intensity of the power supplied to the coil 210 of the driving unit 200 is also adjusted according to the degree of expansion and contraction of the bellows 130.

The above-described embodiments of the present invention have been described in detail with reference to the accompanying drawings, in which detailed contour lines are omitted. It should be noted that the above-described embodiments are not intended to limit the technical spirit of the present invention and are merely a reference for understanding the technical scope of the present invention.

100: operating part
110: body
120: valve
130: bellows
200:

Claims (7)

A first port in communication with the crank chamber of the variable displacement compressor, a second port in communication with the suction chamber of the variable displacement compressor and in communication with or disconnected from the first port, and a discharge chamber of the variable displacement compressor and in communication with the first port or A third port formed to be cut off and an operation unit for adjusting a pressure of the crank chamber; A control valve for a variable displacement compressor including a drive unit coupled to one side of the operation unit for driving the operation unit,
Wherein,
A body in which the first port to the third port are formed and one side thereof is coupled to the driving part;
A valve installed in the body while being concentric with the body and communicating or blocking the first port and the third port while linearly reciprocating by the driving unit;
It is installed inside one side of the valve adjacent to the drive unit communicates or blocks the first port and the second port, and moves the valve while being stretched in accordance with the pressure change of the suction chamber of the third port And a bellows for controlling the degree of communication between the first port and the third port by adjusting the opening and closing degree. The method of claim 1,
The body is formed in a cylindrical shape with a space therein,
One side diameter of the body is formed larger than the other side diameter,
The valve is formed to correspond to the body so that one side portion is installed inside one side portion of the body to have a distance from the inner circumferential surface of the body, and the other side portion is installed inside the other side portion of the body and sealed with the inner circumferential surface of the body. ,
The bellows is a control valve for a variable displacement compressor, characterized in that installed inside one side of the valve. The method of claim 2,
The valve has a first valve and a second valve coupled to each other,
The first valve is formed with a larger diameter than the second valve,
The first valve is installed inside one side of the body has a gap with the inner peripheral surface of the body,
The second valve is installed in the other side of the body control valve for a variable displacement compressor, characterized in that the sealing with the inner peripheral surface of the body. The method of claim 3,
The first port is formed on the other end surface side of the body to communicate with the space of the valve,
The second port is formed on one end side outer circumferential surface of the body and communicates with the space between the body and the valve,
The third port is formed on the outer peripheral surface of the other end side of the body is in communication with the space of the body,
Wherein,
A stopper having one side coupled to the plunger of the driving unit and an outer circumferential surface inserted and coupled to one side of the valve to move the valve while moving with the plunger and simultaneously move the valve by the expansion and contraction of the bellows;
It is coupled to one side of the bellows and as the bellows stretch, the elastic force of the bellows in contact with or separated from the stopper to block or communicate with the first port and the second port, or in contact with the stopper A first connection member for transmitting the valve to the valve via the stopper;
A second connection member coupled to the other side of the bellows;
One side is located inside one side of the valve is coupled to the second connecting member, the central side is located inside the other side of the valve is spaced from the inner peripheral surface of the valve, the other side is located inside the other side of the body A support shaft supporting the bellows;
And a control member inserted into and coupled to the other end surface of the body and coupled to and supported by the other side of the support shaft. 5. The method of claim 4,
The stopper is,
Body;
A spaced protrusion formed on one surface of the body and spaced apart from the driving unit;
A press-fit hole formed in a central portion of the body and to which the plunger is press-fitted;
And a plurality of communication holes formed in a portion of the body outside the indentation hole to communicate the inside of the valve and the second port side. The method of claim 5,
When the power is supplied to the driving unit and the plunger moves toward the operating unit side, the valve and the stopper move by the plunger, the valve blocks the third port and the other side of the body of the stopper connects the first connection. In contact with one side of the member,
The control valve for a variable displacement compressor, characterized in that the portion of the first connecting member and the portion of the body in contact with each other are formed in the inclined surface corresponding to each other. The method according to claim 6,
An adjustment member is inserted and coupled to the inside of the other end surface of the body,
The adjusting member is coupled to the support shaft,
The insertion amount of the adjustment member is inserted into the body is adjustable,
The control member for a variable displacement compressor characterized in that the plurality of the first port is formed in the adjustment member.

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