JP2019132199A - Capacity control valve for variable displacement compressor - Google Patents

Abstract

To provide a capacity control valve for variable displacement compressor for restricting a reduction in compression efficiency of a variable displacement compressor.SOLUTION: A capacity control variable valve 300 defines a minimum flow passage sectional area of a supply passage 145 at a clearance between an outer peripheral surface of an approaching part 322b that approaches to a first valve hole 321d and an inner peripheral surface of a straight hole part 321d1. A first distance L1 ranging from an abutting location against a first valve hole opening peripheral edge 321b2 at the first abutting part 322c to an abutting location at a connecting plane 323c at an intermediate location 324a is longer than a second distance L2 ranging from a valve chamber one end wall 321b1 to a connecting plane 323c at the second valve part 323 kept under a state in which it is abutted against the second valve hole opening peripheral edge 321g2. A third distance L3 ranging from an extremity end of the approaching part 322b to an abutting location against a connecting plane 323c of the second valve part 323 at the intermediate location 324a is less than a fourth distance L4 ranging from the valve chamber side end edge of the straight hole part 321d1 to the connecting plane 323c at the second valve part 323 kept under a state where it is abutted against the second valve hole opening peripheral edge 321g2.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a capacity control valve used in a variable capacity compressor.

  As a variable capacity compressor used in a vehicle air conditioner system or the like, a suction chamber into which refrigerant before compression is introduced, a compression unit that sucks and compresses refrigerant in the suction chamber, and a refrigerant after compression compressed by the compression unit 2. Description of the Related Art A variable capacity compressor that includes a discharge chamber to be discharged, a control pressure chamber, and a capacity control valve that controls the discharge capacity by adjusting the pressure of the control pressure chamber is generally known.

  By the way, in a vehicle air conditioner system, if the variable capacity compressor is stopped for a long time when the air conditioner is turned off, a large amount of liquid refrigerant may accumulate in the compressor. In such a state, even if the compressor is started when the air conditioner is ON, the pressure in the control pressure chamber remains high until the liquid refrigerant in the control pressure chamber is discharged, the discharge capacity does not increase, and the effectiveness of the air conditioner is delayed. There was a problem.

  In view of such a problem, a displacement control valve shown in Patent Document 1 has been proposed. The capacity control valve includes a supply passage that connects the discharge chamber and the control pressure chamber, a first valve portion that forms a part of the supply passage and adjusts the opening of the first valve hole that opens in the valve chamber; A discharge passage that connects between the control pressure chamber and the suction chamber, and a second valve portion that forms part of the discharge passage and adjusts the opening of the second valve hole that opens to the valve chamber. Has been. When the first valve portion and the second valve portion perform opening / closing operations in opposite directions with one valve body housed in the valve chamber, the first valve portion closes the first valve hole. The second valve portion is configured to open the second valve hole to the maximum opening. As a result, when the variable valve compressor has been stopped for a long time and the first valve portion closes the supply passage when the air conditioner is ON, the second valve portion opens the discharge passage to the maximum opening. The refrigerant discharge performance is improved, and the effectiveness of the air conditioner is increased.

  Further, in the capacity control valve disclosed in Patent Document 1, the first valve portion has a first tip portion that enters the first valve hole by the operation in the valve closing direction, and the first valve hole is the first tip portion. A first cylindrical hole defining a minimum flow path cross-sectional area with the outer peripheral surface of the second valve portion, and similarly, the second valve portion enters the second valve hole by operation in the valve closing direction. The second valve hole has a second cylindrical hole that defines a minimum flow passage cross-sectional area with the outer peripheral surface of the second tip portion. When at least a part of the first tip of the first valve part is located in the first cylindrical hole, the supply passage is at a minimum opening degree, and at least a part of the second tip of the second valve part is in the second cylindrical hole. When positioned, the discharge passage is configured to have a minimum opening. And from the state where the tip peripheral edge of the first tip portion is located at a position facing the valve chamber side edge of the first cylindrical hole, the first valve portion moves in the direction of opening the first valve hole, The peripheral edge of the first tip portion retreats from the inside of the first cylindrical hole, and the opening degree of the first valve hole is adjusted in an opening degree region equal to or larger than the minimum opening degree.

JP 2017-129042 A

  However, in the capacity control valve described in Patent Document 1, when the first valve portion is adjusting the opening degree of the first valve hole in an opening range equal to or larger than the minimum opening degree, the second valve portion is the second valve portion. At least a part of the tip is only positioned in the second cylindrical hole. Therefore, when the 1st valve part is adjusting the opening degree of a 1st valve hole in the opening area | region beyond a minimum opening degree, the discharge passage is open | released by the minimum opening degree. As a result, when the refrigerant is going to be supplied from the discharge chamber to the control pressure chamber, a part of the refrigerant in the valve chamber leaks into the suction chamber via the second valve hole. Therefore, more compressed refrigerant must be supplied from the discharge chamber to the control pressure chamber via the first valve hole by the amount of refrigerant leakage, which may reduce the compression efficiency of the compressor.

  Then, an object of this invention is to provide the capacity | capacitance control valve of the variable capacity compressor which can suppress the fall of compression efficiency.

  According to one aspect of the present invention, a suction chamber into which a refrigerant before compression is guided, a compression unit that sucks and compresses the refrigerant in the suction chamber, and a discharge from which the compressed refrigerant compressed by the compression unit is discharged A variable capacity compressor having a chamber and a control pressure chamber, the discharge capacity of which varies according to the pressure of the control pressure chamber, the capacity of the variable capacity compressor used to adjust the pressure of the control pressure chamber A control valve is provided. The capacity control valve of the variable capacity compressor includes a valve chamber that is always in communication with the control pressure chamber, a pressure sensing chamber that is in constant communication with the suction chamber, a first valve hole, a second valve hole, and a central hole. , A first valve portion, a second valve portion, a rod, a solenoid unit, a pressure-sensitive member, and an urging member. The first valve hole extends from one end wall of the valve chamber on the pressure-sensitive chamber side toward the pressure-sensitive chamber and always communicates with the discharge chamber, and the refrigerant in the discharge chamber is communicated with the control pressure chamber. A part of the supply passage for supplying is constituted. The second valve hole connects between the valve chamber and the pressure sensing chamber radially outward of the first valve hole, and discharges the refrigerant in the control pressure chamber to the suction chamber. Part of The central hole extends toward the pressure sensitive chamber continuously from the first valve hole, and opens at one end wall of the pressure sensitive chamber on the valve chamber side in the pressure sensitive chamber. The first valve portion is accommodated in the valve chamber and adjusts the opening of the first valve hole. The second valve portion is housed in the pressure sensitive chamber and adjusts the opening of the second valve hole. The rod is formed integrally with the first valve portion, penetrates the central hole, has one end connected to the first valve portion, and the other end penetrated the second valve portion, and the pressure sensitive. Located indoors. The solenoid unit applies an electromagnetic force in a direction to close the first valve hole to the first valve portion. The pressure-sensitive member is a pressure-sensitive member that is accommodated in the pressure-sensitive chamber and expands and contracts according to the pressure of the suction chamber, and extends as the pressure of the suction chamber decreases and the other end of the rod A biasing force in the direction of opening the first valve hole is applied to the first valve portion via the portion. The biasing member applies a biasing force in a direction to close the second valve hole to the second valve portion. The first valve portion includes a columnar entry portion that enters the first valve hole, and a first entry portion that is provided at a proximal end portion of the entry portion and contacts and separates from a first valve hole opening peripheral edge of the valve chamber one end wall. 1 contact portion. The second valve portion includes a second contact portion that contacts and separates from a peripheral edge of the opening of the second valve hole in the one end wall of the pressure sensing chamber, a through hole through which the other end portion of the rod passes, and an intermediate portion of the rod And a connecting surface that contacts and separates. The first valve hole has a straight hole portion having an inner peripheral surface extending linearly facing the outer peripheral surface of the entering portion that has entered. A gap between the outer peripheral surface of the entry portion and the inner peripheral surface of the straight hole portion defines a minimum channel cross-sectional area for the supply passage. The first distance from the contact portion of the first contact portion with the peripheral edge of the first valve hole opening to the contact portion of the intermediate portion with the connecting surface of the second valve portion is one end of the valve chamber. The predetermined distance is set longer than a second distance from the wall to the connection surface of the second valve portion in contact with the peripheral edge of the second valve hole opening. The third distance from the tip of the entry part to the contact part of the intermediate part with the connecting surface of the second valve part is from the valve chamber side edge of the straight hole part to the peripheral edge of the second valve hole opening. Is set to a predetermined distance equal to or less than a fourth distance to the connection surface in the second valve portion in a state of being in contact with the second valve portion.

In the capacity control valve of the variable capacity compressor, from a contact portion with the peripheral edge of the first valve hole in the first contact portion to a contact portion with the connection surface of the second valve portion in the intermediate portion. The first distance is set to a predetermined distance longer than the second distance from the one end wall of the valve chamber to the connection surface of the second valve portion in contact with the peripheral edge of the second valve hole opening. . Therefore, when the entry portion enters the first valve hole and the first contact portion comes into contact with the first valve hole opening peripheral edge and the first valve portion closes the first valve hole. The intermediate portion of the rod can press the connecting surface of the second valve portion so that the second valve portion can reliably open the second valve hole to the maximum opening. Thus, when the first valve portion closes the supply passage, the second valve portion opens the discharge passage to the maximum opening, so that the refrigerant discharge performance of the control pressure chamber is improved, As with technology, the effectiveness of the air conditioner is increased.
And the 3rd distance from the tip of the entrance part to the contact part with the connection surface of the 2nd valve part in the intermediate part is the 2nd valve hole from the valve chamber side edge of the straight hole part It is set to a predetermined distance equal to or less than a fourth distance to the connection surface in the second valve portion in contact with the peripheral edge of the opening. For this reason, when the first valve portion moves in the opening direction from the closed state of the first valve hole, the tip of the entry portion reaches a position facing the valve chamber side edge of the straight hole portion. Alternatively, before reaching, the pressing of the intermediate portion of the rod to the connecting surface of the second valve portion is released, and the second valve portion is opened to the peripheral edge of the second valve hole by the urging force from the urging member. And the second valve hole is closed. Therefore, the first valve portion moves in a direction to open the first valve hole from a state where the tip of the entry portion is located at a position facing the valve chamber side edge of the straight hole. When the opening degree of one valve hole is adjusted in an opening degree region equal to or larger than the minimum opening degree, the second valve hole can be reliably maintained in a fully closed state. Therefore, when the opening of the first valve hole is adjusted in an opening range equal to or larger than the minimum opening and refrigerant is going to be supplied from the discharge chamber to the control pressure chamber, the first valve is discharged from the discharge chamber. It is possible to reliably prevent a part of the refrigerant guided into the valve chamber through the hole from leaking into the suction chamber through the second valve hole. As a result, it is possible to reliably improve the compression efficiency of the variable capacity compressor as compared with the prior art.

It is sectional drawing which shows schematic structure of the variable capacity compressor to which this invention was applied. It is sectional drawing which shows the structure of the outline of embodiment of the capacity | capacitance control valve of the said variable capacity compressor. It is a principal part expanded sectional view of the 2nd valve part of the said capacity | capacitance control valve. It is a principal part expanded sectional view of the 1st valve part of the said capacity | capacitance control valve, and a 2nd valve part. It is a conceptual diagram for demonstrating the dimensional relationship of the longitudinal direction in the principal part of the said capacity | capacitance control valve. It is a conceptual diagram for demonstrating the lift characteristic of a said 1st valve part and a said 2nd valve part. It is a principal part cross section for demonstrating the modification of the said capacity | capacitance control valve.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a sectional view showing a schematic configuration of a swash plate type variable capacity compressor to which the present invention is applied. This variable capacity compressor is configured as a clutchless compressor mainly applied to an air conditioning system for a vehicle.

  The variable capacity compressor 100 includes a cylinder block 101 in which a plurality of cylinder bores 101 a are formed, a front housing 102 provided on one end side of the cylinder block 101, and a valve plate 103 on the other end side of the cylinder block 101. Cylinder head 104. The cylinder block 101, the front housing 102, the valve plate 103, and the cylinder head 104 are fastened by a plurality of through bolts 105 to constitute a compressor housing. A crank chamber 140 is formed by the cylinder block 101 and the front housing 102, and a drive shaft 110 rotatably supported by the compressor housing is provided so as to traverse the crank chamber 140. Although not shown in the drawing, a center gasket is disposed between the front housing 102 and the cylinder block 101, and a cylinder plate is provided between the cylinder block 101 and the cylinder head 104 in addition to the valve plate 103. A gasket, a suction valve forming plate, a discharge valve forming plate and a head gasket are arranged.

  A swash plate 111 is disposed around an intermediate portion of the drive shaft 110 in the axial direction. The swash plate 111 is connected to a rotor 112 fixed to the drive shaft 110 via a link mechanism 120 and rotates together with the drive shaft 110. Further, the swash plate 111 is configured such that an angle (tilt angle) with respect to a plane orthogonal to the axis O of the drive shaft 110 can be changed.

  The link mechanism 120 includes a first arm 112 a projecting from the rotor 112, a second arm 111 a projecting from the swash plate 111, and one end side rotating with respect to the first arm 112 a via the first connecting pin 122. A link arm 121 that is movably connected and whose other end is rotatably connected to the second arm 111 a via a second connection pin 123.

  The through hole 111b of the swash plate 111 through which the drive shaft 110 is inserted is formed in a shape that allows the swash plate 111 to tilt within a range of a maximum inclination angle and a minimum inclination angle. The through hole 111b is formed with a minimum tilt angle restricting portion that comes into contact with the drive shaft 110. When the inclination angle (minimum inclination angle) of the swash plate 111 when the swash plate 111 is orthogonal to the axis O of the drive shaft 110 is set to 0 °, the minimum inclination restriction portion of the through hole 111b has an inclination angle of the swash plate 111 of approximately 0. When it is, it contacts the drive shaft 110 and is configured to restrict further tilting of the swash plate 111. Further, when the inclination of the swash plate 111 reaches the maximum inclination, the swash plate 111 is brought into contact with the rotor 112 and further tilting is restricted.

  The drive shaft 110 includes a tilt angle reducing spring 114 that biases the swash plate 111 in a direction that decreases the tilt angle of the swash plate 111, and a tilt angle increasing spring 115 that biases the swash plate 111 in a direction that increases the tilt angle of the swash plate 111. And are attached. The inclination decreasing spring 114 is disposed between the swash plate 111 and the rotor 112, and the inclination increasing spring 115 is attached between the swash plate 111 and a spring support member 116 fixed to the drive shaft 110.

  Here, when the inclination angle of the swash plate 111 is the minimum inclination angle, the urging force of the inclination increasing spring 115 is set to be larger than the urging force of the inclination decreasing spring 114, and the drive shaft 110 rotates. When not, the swash plate 111 is positioned at an inclination angle at which the urging force of the inclination angle decreasing spring 114 and the urging force of the inclination angle increasing spring 115 are balanced.

  One end (the left end in FIG. 1) of the drive shaft 110 extends through the boss portion 102 a of the front housing 102 to the outside of the front housing 102. A power transmission device (not shown) is connected to the one end of the drive shaft 110. A shaft seal device 130 is provided between the drive shaft 110 and the boss portion 102a, and the crank chamber 140 is shut off from the external space.

  The coupling body of the drive shaft 110 and the rotor 112 is supported by bearings 131 and 132 in the radial direction, and supported by the bearing 133 and the thrust plate 134 in the thrust direction. The drive shaft 110 (and the rotor 112) is configured to rotate in synchronization with the rotation of the power transmission device when power from an external drive source is transmitted to the power transmission device. The clearance between the other end of the drive shaft 110, that is, the end on the thrust plate 134 side, and the thrust plate 134 is adjusted to a predetermined clearance by an adjustment screw 135.

  A piston 136 is disposed in each cylinder bore 101a. The inner space formed in the protruding portion that protrudes into the crank chamber 140 of the piston 136 accommodates the outer peripheral portion of the swash plate 111 and its vicinity, and the swash plate 111 is connected to the piston 136 via a pair of shoes 137. It is configured to work with. The piston 136 reciprocates in the cylinder bore 101a by the rotation of the swash plate 111 accompanying the rotation of the drive shaft 110. That is, the rotational movement of the drive shaft 110 is converted into the reciprocating movement of the piston 136 by a conversion mechanism including the swash plate 111, the link mechanism 120, a pair of shoes 137, and the like.

  The cylinder head 104 is formed with a suction chamber 141 disposed substantially at the center and a discharge chamber 142 that surrounds the suction chamber 141 in an annular shape. The suction chamber 141 communicates with the cylinder bore 101a via a communication hole 103a provided in the valve plate 103 and a suction valve (not shown) formed on the suction valve forming plate (not shown). The discharge chamber 142 communicates with the cylinder bore 101a through a discharge valve (not shown) formed in the discharge valve forming plate (not shown) and a communication hole 103b provided in the valve plate 103.

  The cylinder head 104 has a suction passage 104b having a suction port 104a at one end. One end of the suction passage 104b (suction port 104a) is connected to the low pressure side of the refrigerant circuit of the air conditioning system (not shown). The other end of the suction passage 104 b extends from the outer peripheral side of the cylinder head 104 so as to cross a part of the discharge chamber 142 and opens into the suction chamber 141.

  A muffler 160 is provided on the side wall (upper portion in FIG. 1) of the cylinder block 101 in order to reduce noise and vibration due to refrigerant pulsation. The muffler 160 is formed by fastening the lid member 106 with a bolt via a seal member (not shown) to a muffler forming wall 101b that is defined on the upper part of the cylinder block 101. In the muffler space 143 in the muffler 160, a check valve 200 for preventing the backflow of the refrigerant gas from the discharge side refrigerant circuit to the discharge chamber 142 is disposed.

  The check valve 200 is disposed at a connection portion between the communication path 144 formed across the cylinder head 104, the valve plate 103, and the cylinder block 101 and the muffler space 143. The check valve 200 operates in response to a pressure difference between the communication path 144 (upstream side) and the muffler space 143 (downstream side), and shuts off the communication path 144 when the pressure difference is smaller than a predetermined value. Is greater than a predetermined value, the communication path 144 is opened. The discharge chamber 142 is connected to the refrigerant circuit of the air conditioner system (not shown) through a discharge passage constituted by the communication passage 144, the check valve 200, the muffler space 143, and the discharge port 106a opened to the lid member 106. Connected to the high pressure side.

  The low-pressure side refrigerant (the refrigerant before compression) in the refrigerant circuit of the air conditioning system is guided to the suction chamber 141 through the suction passage 104b. The refrigerant in the suction chamber 141 is sucked and compressed into the cylinder bore 101a by the reciprocating motion of the piston 136, and the compressed refrigerant is discharged into the discharge chamber 142. That is, in this embodiment, the cylinder bore 101a and the piston 136 constitute a compression unit that sucks and compresses the refrigerant in the suction chamber 141. Then, the refrigerant (compressed refrigerant) discharged into the discharge chamber 142 is guided to the high-pressure side of the refrigerant circuit of the air conditioner system through the discharge passage.

  The cylinder head 104 is further provided with a capacity control valve 300. The capacity control valve 300 is disposed in a valve storage chamber (not shown) formed in the cylinder head 104. The valve storage chamber constitutes a part of a supply passage 145 for supplying the refrigerant in the discharge chamber 142 to the crank chamber 140. The capacity control valve 300 is configured to adjust the opening degree (flow passage cross-sectional area) of the supply passage 145 and thereby control the supply amount of the refrigerant in the discharge chamber 142 to the crank chamber 140. .

  The pressure of the crank chamber 140 can be changed (that is, increased or decreased) by adjusting the opening of the supply passage 145 by the capacity control valve 300, and thereby the inclination angle of the swash plate 111, that is, the stroke of the piston 136 can be increased. The discharge capacity of the variable capacity compressor 100 can be changed by decreasing or increasing the capacity. In other words, the variable displacement compressor 100 is configured such that the discharge capacity is changed by changing the state of the compression section (specifically, the stroke of the piston 136) according to the pressure of the crank chamber 140. In other words, in the variable capacity compressor 100, the crank chamber 140 changes the discharge capacity by changing the state of the compression unit according to the internal pressure. The capacity control valve 300 is mainly used to adjust the pressure in the crank chamber 140. Therefore, in the present embodiment, the crank chamber 140 corresponds to the “control pressure chamber” of the present invention.

  Specifically, by changing the pressure in the crank chamber 140, the pressure difference between the front and rear of each piston 136, in other words, the pressure difference between the compression chamber in the cylinder bore 101a sandwiching the piston 136 and the crank chamber 140 is used. The inclination angle of the swash plate 111 can be changed. As a result, the stroke amount of the piston 136 changes and the discharge capacity of the variable capacity compressor 100 changes. More specifically, when the pressure in the crank chamber 140 is decreased, the inclination angle of the swash plate 111 is increased, the stroke amount of the piston 136 is increased, and the discharge capacity of the variable capacity compressor 100 is increased.

  In the present embodiment, the refrigerant in the crank chamber 140 flows to the suction chamber 141 via the discharge passage 146. The discharge passage 146 includes a first discharge passage 146a having a fixed throttle 103c and a second discharge passage 146b provided in parallel to the first discharge passage 146a via the capacity control valve 300. The first discharge passage 146a includes a communication passage 101c and a space 101d formed in the cylinder block 101, and a fixed throttle 103c formed in the valve plate 103, and is always open. Accordingly, the first discharge passage 146a mainly functions as a passage for releasing the pressure in the crank chamber 140. As will be described in detail later, the opening degree of the second discharge passage 146b is adjusted by the capacity control valve 300, and the capacity control valve 300 opens the opening degree of the supply passage 145 above the minimum opening degree. The second discharge passage 146b is configured to be maintained in a fully closed state when the adjustment is performed in the degree region.

  In the present embodiment, a signal is input to the capacity control valve 300 from a control device (not shown) provided outside the variable capacity compressor 100. Further, the pressure (refrigerant) of the suction chamber 141 is guided to the capacity control valve 300 via a pressure introduction passage 147 that constitutes a part of the second discharge passage 146b. The capacity control valve 300 basically opens the supply passage 145 so that the pressure in the suction chamber 141 becomes a pressure set by the signal based on the air conditioning setting (chamber interior set temperature), the external environment, and the like. Configured to adjust the degree. As the opening of the supply passage 145 is adjusted by the capacity control valve 300, the discharge capacity of the variable capacity compressor 100 changes.

  Next, an embodiment of the capacity control valve 300 will be described with reference to FIGS. 2 and 3. In the following, for convenience of explanation, a portion from the discharge chamber 142 to the capacity control valve 300 in the supply passage 145 is referred to as a supply passage 145A, and a portion from the capacity control valve 300 to the crank chamber 140 in the supply passage 145 is defined. Let it be a supply passage 145B.

  As shown in FIG. 2, the capacity control valve 300 includes a solenoid unit 310 and a valve unit 320.

  The solenoid unit 310 includes a fixed core 311 in which a through hole 311a extending from one end surface to the other end surface is formed, a movable core 312 disposed with a gap between the one end surface of the fixed core 311, and a movable core Solenoid rod 313 that is integrally connected to 312 and inserted in through hole 311a with a gap, compression coil spring 314 that urges movable core 312 in a direction away from fixed core 311, and a bottomed cylindrical shape. A housing member 315 for housing the fixed core 311 and the movable core 312, a coil 316 disposed so as to surround the housing member 315 and covered with resin, and a solenoid housing 317 for housing the coil 316 and holding the housing member 315. And having. In the present embodiment, the end of the fixed core 311 opposite to the movable core 312 is formed as a large-diameter portion 311b having a larger diameter than other portions.

  The solenoid rod 313 is formed integrally with a later-described first valve portion 322 of the valve unit 320. The housing member 315 is made of a nonmagnetic material. The fixed core 311, the movable core 312 and the solenoid housing 317 are made of a magnetic material and constitute a magnetic circuit. When the coil 316 is energized, the solenoid unit 310 generates an electromagnetic force that moves the movable core 312 toward the fixed core 311 against the biasing force of the compression coil spring 314. Then, the movement of the movable core 312 toward the fixed core 311 is transmitted to the first valve part 322 of the valve unit 320 via the solenoid rod 313, and the first valve part 322 moves in the direction of closing the supply passage 145. That is, the solenoid unit 310 is configured to apply an electromagnetic force in a direction to close the supply passage 145 to the first valve portion 322. In addition, the direction which closes the supply channel | path 145 means the direction which the 1st valve part 322 closes the 1st valve hole 321d so that it may mention later.

  The valve unit 320 includes a valve housing 321, a first valve part 322, a second valve part 323, a pressure sensitive rod 324, a pressure sensitive member 325, and a biasing member 326. In the present embodiment, the pressure-sensitive rod 324 corresponds to a “rod” according to the present invention.

  In the valve housing 321, a first recess 321 a that is recessed in a columnar shape and a valve chamber 321 b that houses the first valve portion 322 are formed in cooperation with the fixed core 311 in order from the solenoid unit 310 side. A first valve hole 321d opened / closed by the first valve part 322, a second valve hole 321e opened / closed by the second valve part 323, a central hole 321f through which the pressure-sensitive rod 324 is inserted and supported, A pressure sensitive chamber 321g for accommodating the pressure member 325 is formed on the same axis except for the second valve hole 321e. Further, the valve housing 321 includes a communication hole 321h that communicates the supply passage 145B and the valve chamber 321b, a communication hole 321i that communicates the supply passage 145A and the first valve hole 321d, and a pressure introduction passage 147 and a pressure sensing chamber. A communication hole 321j communicating with 321g is formed.

  In the present embodiment, for example, one second valve hole 321e is provided, the communication hole 321h and the communication hole 321j are respectively provided at a plurality of positions spaced in the circumferential direction of the valve housing 321, and the communication hole 321i is the second valve. It is assumed that the valve housing 321 is provided at a plurality of positions separated from each other in the circumferential direction so as to avoid the hole 321e. One or all of the communication holes 321h to 321j may be provided.

  The large-diameter portion 311b of the fixed core 311 of the solenoid unit 310 is fitted into the first recess 321a. The end surface of the large diameter portion 311b of the fixed core 311 is in contact with the bottom surface of the first recess 321a. By fitting the large-diameter portion 311b of the fixed core 311 into the first recess 321a, the opening of the second recess 321c is closed. As a result, the valve chamber 321b is partitioned and formed by the second recess 321c and the end surface of the large diameter portion 311b of the fixed core 311.

  The valve chamber 321b always communicates with the crank chamber 140 through the communication hole 321h and the supply passage 145B. The bottom wall of the second recess 321c constitutes the valve chamber one end wall 321b1 on the pressure sensitive chamber 321g side in the valve chamber 321b. The valve chamber one end wall 321b1 is formed as a flat plane.

  The first valve hole 321d extends from the valve chamber one end wall 321b1 toward the pressure sensing chamber 321g and always communicates with the discharge chamber 142 to constitute a part of the supply passage 145. Specifically, the first valve hole 321d has one end opened to the valve chamber one end wall 321b1, and the other end side is always in communication with the discharge chamber 142 via the communication hole 321i and the supply passage 145A.

  The second valve hole 321e connects the valve chamber 321b and the pressure sensing chamber 321g on the radially outer side of the first valve hole 321d, and is a part of the discharge passage 146 (specifically, a part of the second discharge passage 146b). Part). One end of the second valve hole 321e opens to the valve chamber one end wall 321b1, and the other end of the second valve hole 321e opens to the pressure sensing chamber one end wall 321g1 on the valve chamber 321b side in the pressure sensing chamber 321g.

  The central hole 321f extends toward the pressure sensing chamber 321g continuously to the first valve hole 321d and opens to the pressure sensing chamber one end wall 321g1. Specifically, one end of the central hole 321f is connected to the other end of the first valve hole 321d, and the other end of the central hole 321f opens to the pressure-sensitive chamber one end wall 321g1. In the present embodiment, the central hole 321f has an inner diameter that is the same as that of the first valve hole 321d and extends toward the pressure sensing chamber 321g. The first valve hole 321d is formed at the opening portion of the pressure sensing chamber one end wall 321g1. It has an enlarged diameter portion 321f1 extending with an inner diameter larger than the inner diameter. Therefore, the inner diameter of the enlarged diameter portion 321f1 is larger than the outer diameter of a later-described large diameter portion 324c of the pressure sensitive rod 324.

  The pressure sensing chamber 321g always communicates with the suction chamber 141 through the communication hole 321j and the pressure introduction passage 147.

  In the present embodiment, the pressure-sensitive chamber one end wall 321g1 on the valve chamber 321b side in the pressure-sensitive chamber 321g is flush with a second valve hole opening peripheral edge 321g2, which will be described later, and is formed in an annular shape around the central hole 321f. It has an annular seating surface 321g3.

  The first valve portion 322 is accommodated in the valve chamber 321b and adjusts the opening degree of the first valve hole 321d. The first valve portion 322 connects between the solenoid rod 313 and the pressure sensitive rod 324. In the present embodiment, the first valve portion 322 is formed integrally with the solenoid rod 313 and the pressure sensitive rod 324. That is, the end of the solenoid rod 313 is connected to one end of the first valve portion 322, and the end of the pressure sensitive rod 324 is connected to the other end of the first valve portion 322. The integrally formed body of the solenoid rod 313, the first valve portion 322, and the pressure sensitive rod 324 extends in one direction.

  The 2nd valve part 323 is accommodated in the pressure sensitive chamber 321g, and adjusts the opening degree of the 2nd valve hole 321e. The second valve part 323 is formed separately from the first valve part 322. The second valve portion 323 has a through hole 323a through which the pressure sensitive rod 324 passes. A groove portion 323a1 extending in the hole axis direction of the through hole 323a is formed in the hole wall of the through hole 323a.

  The pressure sensitive rod 324 is formed integrally with the first valve part 322 and penetrates the central hole 321f. One end of the pressure sensitive rod 324 is connected to the first valve portion 322, and the other end of the pressure sensitive rod 324 passes through the second valve portion 323 (through hole 323a) and is located in the pressure sensitive chamber 321g. An intermediate portion 324a in the longitudinal direction of the pressure-sensitive rod 324 contacts and separates from the second valve portion 323 (specifically, a connecting surface 323c described later).

  In this embodiment, the pressure-sensitive rod 324 includes a cylindrical small-diameter portion 324b that constitutes the other end portion and contacts and separates from one end of the pressure-sensitive member 325 (more specifically, an end member 325b described later), and a small-diameter portion 324b. A cylindrical large-diameter portion 324c having a large outer diameter and supported by the inner peripheral surface of the central hole 321f is connected to the large-diameter portion 324c and the first valve portion 322, and the first valve hole 321d. And a connecting portion 324d having an outer diameter smaller than that of the large diameter portion 324c.

  The intermediate portion 324a that contacts and separates from the second valve portion 323 in the pressure-sensitive rod 324 is formed as an annular surface that connects between the outer peripheral surface of the small diameter portion 324b and the outer peripheral surface of the large diameter portion 324c. In a state where the second valve portion 323 closes the second valve hole 321e, the intermediate portion 324a is located in the diameter-enlarged portion 321f1 of the central hole 321f. A gap between the outer peripheral surface of the large diameter portion 324c and the inner peripheral surface of the central hole 321f is set as a minute gap. Thereby, the first valve hole 321d and the pressure sensitive chamber 321g are substantially partitioned. Preferably, as shown in FIG. 2, an annular groove for labyrinth seal is formed on the outer peripheral surface of the large diameter portion 324c.

  The pressure-sensitive member 325 is accommodated in the pressure-sensitive chamber 321g and expands and contracts according to the pressure in the suction chamber 141. The pressure-sensitive member 325 expands as the pressure in the suction chamber 141 decreases, and the first valve hole 321d is formed with respect to the first valve portion 322 via the small-diameter portion 324b (the other end portion) of the pressure-sensitive rod 324. An urging force in the opening direction is applied. Specifically, the pressure-sensitive member 325 includes a bellows 325a, an end member 325b as a movable end, a compression coil spring 325d, and a stopper 325e. The bellows 325a is formed in a bellows shape with a bottom so that the bellows 325a can expand and contract in the moving direction of the first valve portion 322. The end member 325b closes one end of the bellows 325a and receives the small diameter portion 324b of the pressure-sensitive rod 324. The compression coil spring 325d is disposed between the end member 325b and the stopper 325e inside the bellows 325a, and biases the end member 325b in a direction in which the bellows 325a extends. The stopper 325e is a member that regulates the contraction of the bellows 325a.

  The urging member 326 is a member that applies an urging force in a direction to close the second valve hole 321e to the second valve portion 323, and includes, for example, a compression coil spring.

  In the present embodiment, the urging member 326 is provided between the second valve portion 323 and the pressure sensitive member 325. Therefore, the pressure-sensitive member 325 is pressed against the pressure-sensitive chamber other end wall 321g4 facing the pressure-sensitive chamber one-end wall 321g1 by the biasing member 326.

  Here, the pressure-sensitive rod 324, the first valve portion 322, the solenoid rod 313, and the movable core 312 are integrated. In the integrated structure including the pressure sensitive rod 324, the first valve portion 322, the solenoid rod 313, and the movable core 312, the pressure sensitive rod 324 (the outer peripheral surface of the large diameter portion 324c) slides on the inner peripheral surface of the center hole 321f. The outer peripheral surface of the movable core 312 is slidably supported on the inner peripheral surface of the housing member 315. Therefore, the integrated component is supported so as to be movable in the axial direction.

  The capacity control valve 300 includes a first internal passage that connects the discharge chamber 142 (supply passage 145A) and the crank chamber 140 (supply passage 145B), a crank chamber 140 (supply passage 145B), and a suction chamber 141 (pressure introduction passage). 147) is formed. The first internal passage includes a communication hole 321i, a first valve hole 321d, a valve chamber 321b, and a communication hole 321h. The second internal passage includes a communication hole 321h, a valve chamber 321b, a second valve hole 321e, a pressure sensing chamber 321g, a gap between the outer peripheral surface of the small diameter portion 324b and the inner peripheral surface of the through hole 323a, a groove portion 323a1, It is comprised by the clearance gap between the outer peripheral surface of the 2 valve part 323, and the internal peripheral surface of the pressure sensitive chamber 321g, and the communicating hole 321j. The second discharge passage 146b includes a supply passage 145B, the second internal passage, and a pressure introduction passage 147. Accordingly, the first valve hole 321d which is a part of the first internal passage constitutes a part of the supply passage 145 for supplying the refrigerant in the discharge chamber 142 to the crank chamber 140, and the second internal passage The second valve hole 321e which is a part constitutes a part of a discharge passage 146 (specifically, the second discharge passage 146b) for discharging the refrigerant in the crank chamber 140 to the suction chamber 141.

  Then, the solenoid unit 310 and the valve unit 320 are fitted and fixed to be integrated with each other, whereby the displacement control valve 300 is completed.

  Next, detailed structures of the first valve portion 322 and the first valve hole 321d, and the second valve portion 323 and the second valve hole 321e will be described with reference to FIGS.

  The first valve portion 322 includes a columnar first body portion 322a, a columnar entry portion 322b that enters the first valve hole 321d and has an outer diameter smaller than the first body portion 322a, and the entry portion 322b. A first abutting portion 322c that is provided at the base end portion and contacts and separates from the first valve hole opening peripheral edge 321b2 in the valve chamber one end wall 321b1.

  The first contact portion 322c is a plane that is orthogonal to the extending direction of the first valve portion 322 and parallel to the valve chamber one end wall 321b1. Specifically, the first contact portion 322c is configured by an annular surface at the tip of the first main body portion 322a. The first valve hole 321d is closed by the first contact portion 322c formed of an annular surface coming into contact with the first valve hole opening peripheral edge 321b2 in the valve chamber one end wall 321b1. That is, in the present embodiment, the first valve hole opening peripheral edge 321b2 constitutes a valve seat having an annular surface with which the first valve portion 322 abuts, and the first valve portion 322 is a first valve seat. It contacts the valve hole opening periphery 321b2 by surface contact. Thereby, the 1st valve part 322 is stably seated on the 1st valve hole opening peripheral edge 321b2 as a valve seat.

  The first valve hole 321d has a straight hole 321d1 having an inner peripheral surface that extends linearly facing the outer peripheral surface of the entering portion 322b that has entered.

  A gap between the outer peripheral surface of the entry portion 322b and the inner peripheral surface of the straight hole portion 321d1 defines a minimum flow path cross-sectional area greater than zero for the supply passage 145. In other words, the minimum opening of the first valve hole 321d is defined by the gap between the outer peripheral surface of the entry portion 322b and the inner peripheral surface of the straight hole portion 321d1. Therefore, the straight hole portion 321d1 is a flow rate restricting portion.

  In the present embodiment, the first valve hole 321d is configured only by the straight hole portion 321d1. That is, the valve chamber side edge of the straight hole portion 321d1 is positioned on the valve chamber one end wall 321b1.

  The second valve portion 323 is in contact with the second contact portion 323b contacting and separating from the second valve hole opening peripheral edge 321g2 in the pressure sensing chamber one end wall 321g1, the above-described through hole 323a, and the intermediate portion 324a of the pressure sensing rod 324. And a connecting surface 323c to be separated.

  In the present embodiment, as described above, the pressure-sensitive chamber one end wall 321g1 is flush with the second valve hole opening peripheral edge 321g2, and has an annular seat surface 321g3 formed in an annular shape around the central hole 321f. . The through hole 323a passes through the second contact portion 323b. The second contact portion 323b is formed in an annular shape corresponding to the annular seat surface 321g3 with the through hole 323a as a center, and has an annular contact surface 323b1 that contacts and separates from the annular seat surface 321g3.

  Specifically, the second contact portion 323b is formed in a cylindrical shape, and the annular contact surface 323b1 is configured by a cylindrical one end surface of the second contact portion 323b. The second valve hole 321e is closed by the annular contact surface 323b1 contacting the annular seat surface 321g3 including the second valve hole opening peripheral edge 321g2. That is, in the present embodiment, the annular seat surface 321g3 including the second valve hole opening peripheral edge 321g2 constitutes a valve seat having an annular surface with which the second valve portion 323 abuts, and the second valve portion 323 (details). The annular contact surface 323b1) contacts the annular seat surface 321g3 as a valve seat by surface contact.

  In the present embodiment, the connecting surface 323c is configured by the through hole opening peripheral edge of the annular contact surface 323b1. An intermediate portion 324a formed of an annular surface of the pressure-sensitive rod 324 contacts the connecting surface 323c formed of the peripheral edge of the through-hole opening. When the second valve portion 323 is pressed against the biasing force of the biasing member 326 by the intermediate portion 324a of the pressure-sensitive rod 324, the second valve portion 323 moves in the direction of opening the second valve hole 321e, and the second valve hole Open 321e.

  In the present embodiment, the second valve portion 323 further includes a guide portion 323d that is slidably supported on the inner peripheral surface of the pressure sensitive chamber 321g. Specifically, the guide portion 323d is formed in a cylindrical shape, has an outer diameter that matches the inner diameter of the inner peripheral surface of the pressure-sensitive chamber 321g, and a pressure-sensitive member from the other end surface of the cylindrical second contact portion 323b. It extends toward the 325 side. The pressure sensitive chamber 321g has a substantially cylindrical space inside, and the movement of the second valve portion 323 is guided by the inner peripheral surface of the pressure sensitive chamber 321g. Therefore, the second valve portion 323 supported by the inner peripheral surface of the pressure sensitive chamber 321g has a gap over the entire circumference between the inner peripheral surface of the through hole 323a and the outer peripheral surface of the small diameter portion 324b. Is provided.

  The second valve hole 321e extends linearly substantially parallel to the axis of the first valve hole 321d on the outer side in the radial direction of the first valve hole 321d. One end of the second valve hole 321e opens at a position avoiding the first valve hole opening peripheral edge 321b2 in the valve chamber one end wall 321b1. The other end of the second valve hole 321e opens to the pressure sensing chamber one end wall 321g1. The second valve hole 321e is not limited to one, and is formed to extend substantially parallel to the axis of the first valve hole 321d at a plurality of positions spaced in the circumferential direction of the valve housing 321 so as to surround the first valve hole 321d. May be.

  Next, with reference to FIG. 5, dimensions in the longitudinal direction (extending direction) and the like in the main part including the first valve part 322 and the second valve part 323 will be described.

  The first distance L1 from the contact portion with the first valve hole opening peripheral edge 321b2 in the first contact portion 322c to the contact portion with the connection surface 323c of the second valve portion 323 in the intermediate portion 324a is one end of the valve chamber. It is set to a predetermined distance longer than the second distance L2 from the wall 321b1 to the connecting surface 323c (annular contact surface 323b1) in the second valve portion 323 in contact with the second valve hole opening peripheral edge 321g2 (L1). > L2). In other words, in the present embodiment, the first contact portion 322c is an annular surface at the tip of the first main body portion 322a, and the intermediate portion 324a includes the outer peripheral surface of the small diameter portion 324b and the outer peripheral surface of the large diameter portion 324c. Since these surfaces are formed in parallel to each other, the first distance L1 is the inter-surface distance between the first contact portion 322c and the intermediate portion 324a. is there. Further, since the connecting surface 323c is flush with the annular contact surface 323b1, the second distance L2 can be said to be a distance between the valve chamber one end wall 321b1 and the annular contact surface 323b1. Accordingly, when the entry portion 322b enters the first valve hole 321d, the first contact portion 322c contacts the first valve hole opening peripheral edge 321b2, and the first valve portion 322 closes the first valve hole 321d. The intermediate portion 324a of the pressure-sensitive rod 324 presses the connecting surface 323c of the second valve portion 323, and the second valve portion 323 is spaced apart from the second valve hole opening peripheral edge 321g2 to the maximum, so that the second valve hole 321e is maximized. Open to opening.

  The third distance L3 from the tip of the entry portion 322b to the contact portion of the intermediate portion 324a with the connecting surface 323c of the second valve portion 323 is the second valve hole opening peripheral edge from the valve chamber side edge of the straight hole portion 321d1. It is set to a predetermined distance equal to or less than a fourth distance L4 to the connection surface 323c in the second valve portion 323 in contact with 321g2 (L4 ≧ L3). For this reason, when the first valve portion 322 moves from the closed state of the first valve hole 321d to the opening direction, the tip of the entry portion 322b faces the valve chamber side edge (valve chamber one end wall 321b1) of the straight hole portion 321d1. When reaching or before reaching the position, the pressure from the intermediate portion 324a of the pressure-sensitive rod 324 to the connecting surface 323c of the second valve portion 323 is released, and the second valve portion 323 is pressed from the biasing member 326. The second valve hole 321e is closed by abutting against the second valve hole opening peripheral edge 321g2 by force. In the present embodiment, the valve chamber side edge of the straight hole portion 321d1 is located on the valve chamber one end wall 321b1. Therefore, the fourth distance L4 is a distance from the valve chamber one end wall 321b1 to the connection surface 323c of the second valve portion 323 in contact with the second valve hole opening peripheral edge 321g2, and is the same as the second distance L2. . The first distance L1 is naturally larger than the third distance L3.

  In the present embodiment, the third distance L3 is set shorter than the fourth distance L4. Therefore, in this embodiment, the relationship of L1> L4 (= L2)> L3 is established. For this reason, when the first valve portion 322 moves from the closed state of the first valve hole 321d to the opening direction, the tip of the entry portion 322b faces the valve chamber side edge (valve chamber one end wall 321b1) of the straight hole portion 321d1. Before reaching the position, the pressure from the intermediate portion 324a of the pressure-sensitive rod 324 to the connecting surface 323c of the second valve portion 323 is reliably released, and the second valve portion 323 is biased by the biasing member 326. Thus, the second valve hole 321e is closed by abutting on the second valve hole opening peripheral edge 321g2.

  Here, in this embodiment, the one-piece structure including the pressure-sensitive rod 324, the first valve portion 322, the solenoid rod 313, and the movable core 312 is defined by the outer diameter of the large-diameter portion 324c of the pressure-sensitive rod 324. The cross-sectional area of the large-diameter portion 324c and the cross-sectional area of the entry portion 322b defined by the outer diameter of the entry portion 322b are set to be approximately equal. For this reason, the pressure in the discharge chamber 142 is canceled by acting on substantially the same area in the vertical direction in the space formed by the first valve hole 321d and the central hole 321f. Since the pressure sensitive chamber 321g communicates with the suction chamber 141, the pressure sensitive member 325 expands and contracts according to the pressure of the suction chamber 141. Therefore, when the second valve portion 323 closes the second valve hole 321e, the first valve portion 322 generally includes the electromagnetic force in the direction of closing the first valve hole 321d generated by the solenoid unit 310, and the integrated configuration. Opening / closing is controlled according to the pressure of the suction chamber 141 acting on the pressure-sensitive member 325 via the object. The pressure-sensitive member 325 has a bellows 325a that expands as the pressure in the suction chamber 141 decreases, and a biasing force in the direction of opening the first valve hole 321d with respect to the first valve portion 322 via the pressure-sensitive rod 324. Will act.

  Next, functions of the first internal passage and the second internal passage will be described.

  In the capacity control valve 300, the first internal passage (communication hole 321i, first valve hole 321d, valve chamber 321b, communication hole 321h) is discharged when the first valve portion 322 opens the first valve hole 321d. When the chamber 142 (supply passage 145A) communicates with the crank chamber 140 (supply passage 145B) and the first valve portion 322 closes the first valve hole 321d, the discharge chamber 142 (supply passage 145A) and the crank chamber 140 (supply) The communication with the passage 145B) is cut off. Then, when the first valve portion 322 opens the first valve hole 321d, the refrigerant in the discharge chamber 142 is supplied to the crank chamber 140, and the pressure in the crank chamber 140 increases. Therefore, the first valve hole 321d constitutes a part of the supply passage 145 as described above, and is downstream of the first valve hole 321d in the first internal passage, specifically, the valve chamber. 321b and the communication hole 321h constitute a part of the supply passage 145 when the first valve portion 322 opens the first valve hole 321d.

  In the capacity control valve 300, the second internal passage (the communication hole 321h, the valve chamber 321b, the second valve hole 321e, the pressure sensing chamber 321g, the outer peripheral surface of the small diameter portion 324b and the inner peripheral surface of the through hole 323a). , The groove portion 323a1, the gap between the outer peripheral surface of the second valve portion 323 and the inner peripheral surface of the pressure sensing chamber 321g, and the communication hole 321j), the second valve portion 323 opens the second valve hole 321e. When this occurs, the crank chamber 140 (supply passage 145B) and the suction chamber 141 (pressure introduction passage 147) communicate with each other, and the refrigerant in the crank chamber 140 flows toward the suction chamber 141 through the second internal passage. Therefore, the second internal passage including the second valve hole 321e constitutes a part of the second discharge passage 146b different from the first discharge passage 146a.

  In the state where the first valve portion 322 opens the first valve hole 321d and the second valve portion 323 closes the second valve hole 321e, a part of the refrigerant from the discharge chamber 142 is connected to the communication hole 321i, The first valve hole 321d and the large diameter portion 324c flow into the enlarged diameter portion 321f1 of the central hole 321f via a gap between the outer peripheral surface of the large diameter portion 324c and the inner peripheral surface of the central hole 321f. However, the gap between the outer peripheral surface of the small diameter portion 324b and the inner peripheral surface (hole wall) of the through hole 323a of the second valve portion 323 and the flow path cross-sectional area defined by the groove portion 323a1 are the large diameter portion 324c. Is set larger than the flow path cross-sectional area defined by the gap between the outer peripheral surface of the central hole 321f and the inner peripheral surface of the central hole 321f. For this reason, in the state where the second valve portion 323 closes the second valve hole 321e, the refrigerant that has flowed into the enlarged diameter portion 321f1 from the discharge chamber 142 passes through the outer peripheral surface of the small diameter portion 324b and the through hole of the second valve portion 323. It is quickly discharged into the pressure-sensitive chamber 321g via the gap between the inner peripheral surface (hole wall) of 323a and the flow path formed by the groove 323a1. As a result, the pressure of the enlarged diameter portion 321f1 facing the second valve portion 323 is maintained substantially equal to the pressure of the pressure sensitive chamber 321g. Accordingly, the second valve portion 323 does not move in the direction of opening the second valve hole 321e due to the refrigerant flow from the discharge chamber 142 to the enlarged diameter portion 321f1, and the valve closing state of the second valve hole 321e is maintained. .

  Next, the operation of the capacity control valve 300 will be described in detail with reference to FIGS. FIG. 6 is a lift characteristic diagram of the first valve portion 322 and the second valve portion 323, and the states shown in FIGS. 4 (a), 4 (b) and 4 (c) are shown in FIG. ), (B) and (c) respectively corresponding to the state of the valve lift. In FIG. 6, the horizontal axis indicates the ratio of the lift amount to the total lift amount (total movement amount) in one direction of the first valve portion 322, and the vertical axis indicates the flow in the first valve hole 321d and the second valve hole 321e. The road cross-sectional area (valve opening) is shown. The lift amount is an amount based on the position when the first valve portion 322 closes the first valve hole 321d.

  When the air conditioning system is in operation, that is, in the operating state of the variable capacity compressor 100, the control device performs PWM control at a predetermined frequency in the range of 400 to 500 Hz, for example, based on air conditioning settings (cabin set temperature), external environment, and the like. To control the energization amount of the coil 316 of the capacity control valve 300. The capacity control valve 300 then opens the first valve hole 321d (that is, the supply passage 145) by the first valve portion 322 so that the pressure in the suction chamber 141 becomes a set pressure corresponding to the energization amount of the coil 316. Is adjusted to control the discharge capacity of the variable capacity compressor 100.

  In the state before the operation in which the control device turns off the coil 316 of the capacity control valve 300, the first valve portion 322 opens the first valve hole 321d to the maximum opening degree mainly by the urging force of the compression coil spring 314. The second valve portion 323 closes the second valve hole 321e mainly by the urging force from the urging member 326.

  When the control device turns on the coil 316 of the displacement control valve 300, the integrated component composed of the pressure-sensitive rod 324, the first valve portion 322, the solenoid rod 313, and the movable core 312 is subjected to the urging force of the compression coil spring 314 and the like. The first valve portion 322 moves against the first valve hole 321d.

  Then, as shown in FIG. 4A, the first contact portion 322c of the first valve portion 322 contacts the first valve hole opening peripheral edge 321b2, and the first valve hole 321d is closed. At the same time, the intermediate portion 324a of the pressure-sensitive rod 324 presses the connecting surface 323c of the second valve portion 323 against the biasing force of the biasing member 326, and the second valve portion 323 has a second valve hole opening peripheral edge 321g2. The second valve hole 321e is opened to the maximum opening degree (see the position (a) in FIG. 6). At this time, the crank chamber 140 includes the first exhaust passage 146a (the communication passage 101c, the space 101d, the fixed throttle 103c) and the second exhaust passage 146b (the supply passage 145B, the second valve hole 321e). In addition, the refrigerant communicates with the suction chamber 141 via two paths including the pressure introduction passage 147), so that the refrigerant in the crank chamber 140 can be quickly discharged to the suction chamber 141. Accordingly, the pressure in the crank chamber 140 is equivalent to the pressure in the suction chamber 141, the inclination angle of the swash plate 111 is maximized, and the stroke amount of the piston 136 is maximized. And when the 1st valve part 322 has closed the 1st valve hole 321d, the 2nd valve part 323 always opens the 2nd valve hole 321e. For example, such a state is continued from the start of the air conditioner until it approaches a predetermined state in which the air conditioning state in the passenger compartment is set.

From the state shown in FIG. 4A, for example, even if the first contact portion 322c is slightly separated from the first valve hole opening peripheral edge 321b2, the tip of the entry portion 322b is located in the straight hole portion 321d1. When (see the region between the positions (a) and (b ′) in FIG. 6), the first valve hole 321d is throttled to the minimum opening, and the first valve hole 321d is connected to the valve chamber 321b. The flow is the minimum flow, and the pressure in the crank chamber 140 cannot be increased. On the other hand, the second valve portion 323 approaches the second valve hole 321e, and the opening degree of the second valve hole 321e gradually decreases from the maximum opening degree as shown in FIG. The opening degree of the second valve hole 321e is determined by the flow path area S of the belt-shaped flow path formed by the gap between the second valve hole opening peripheral edge 321g2 and the annular contact surface 323b1. This flow path area S is determined by the following equation (1), where r is the radius of the second valve hole 321e and t is the distance between the second valve hole opening peripheral edge 321g2 and the annular contact surface 323b1. .
S = 2πrt Formula (1)

  Then, for example, the first valve portion 322 further moves in the direction of opening the first valve hole 321d, and the tip of the entry portion 322b faces the valve chamber side edge (the valve chamber one end wall 321b1) of the straight hole portion 321d1. Before reaching the position (corresponding to the position (b ′) in FIG. 6), the pressure from the intermediate portion 324a of the pressure-sensitive rod 324 to the connecting surface 323c of the second valve portion 323 is released. At this time, as shown in FIG. 4B, the second valve portion 323 contacts the second valve hole opening peripheral edge 321g2 by the urging force from the urging member 326 and closes the second valve hole 321e. As a result, the flow to the suction chamber 141 via the second discharge passage 146b including the second valve hole 321e is blocked (see the position (b) in FIG. 6).

  Therefore, as shown in FIG. 4B, when the intermediate portion 324a of the pressure-sensitive rod 324 is positioned so as to be flush with the pressure-sensitive chamber one end wall 321g1 (annular contact surface 323b1), the entry portion 322b The front end of the first valve portion 322d is still positioned in the straight hole portion 321d1, and the outer peripheral surface of the entry portion 322b overlaps the inner peripheral surface of the straight hole portion 321d1 by a predetermined width in the longitudinal direction of the first valve portion 322. Has been. At this time, the opening degree of the first valve hole 321d is maintained at the minimum opening degree, and the second valve hole 321e is closed (see the position (b) in FIG. 6). That is, as shown in FIG. 6, there is a region (overlap region) where the region where the opening of the first valve hole 321d is maintained at the minimum opening and the region where the second valve hole 321e is closed overlap each other. Is provided. In this overlap region, the crank chamber 140 communicates with the suction chamber 141 only through the first discharge passage 146a.

  From the state shown in FIG. 4B, for example, the first valve portion 322 further moves in the direction of opening the first valve hole 321d, and the tip of the entry portion 322b is the valve chamber side edge of the straight hole portion 321d1 ( When a position opposite to the valve chamber one end wall 321b1) (corresponding to the position (b ′) in FIG. 6) is exceeded, the first valve portion 322 reduces the opening of the first valve hole 321d according to the lift amount. The opening is adjusted to be greater than or equal to the opening (see the flow rate adjustment region on the right side of the position (b ′) in FIG. 6). On the other hand, the intermediate portion 324a of the pressure-sensitive rod 324 is separated from the connection surface 323c of the second valve portion 323, and then the second valve portion 323 keeps the second valve hole 321e closed by the biasing force of the biasing member 326. Is done. Accordingly, even in the flow rate adjustment region, the crank chamber 140 is only in communication with the suction chamber 141 only through the first discharge passage 146a. Therefore, in the flow path adjustment region, the discharge of the refrigerant from the crank chamber 140 to the suction chamber 141 via the discharge passage 146 is suppressed, and the pressure of the crank chamber 140 is adjusted by adjusting the opening of the first valve hole 321d. It can be easily changed (pressure increase, pressure reduction), and the stroke angle of the piston 136 can be quickly controlled by changing the inclination angle of the swash plate 111. By controlling the stroke amount of the piston 136, the flow rate of the refrigerant flowing through the refrigerant circuit of the air conditioning system is adjusted, and the air conditioning state in the passenger compartment is maintained in a predetermined state.

  Then, for example, when the first valve portion 322 moves in the direction of opening the first valve hole 321d until the end of the solenoid rod 313 on the movable core 312 side contacts the bottom wall of the housing member 315, at this position, The movement of the first valve part 322 is prevented. At this time, as shown in FIG. 4 (c), the first contact portion 322c of the first valve portion 322 is maximally separated from the first valve hole opening peripheral edge 321b2, and the first valve portion 322 is the first valve hole 321d. Is opened to the maximum opening (see position (c) in FIG. 6). Specifically, when the operation of the air conditioning system is stopped, that is, when the variable capacity compressor 100 is switched from the operating state to the non-operating state, the control device turns off the energization of the coil 316 of the capacity control valve 300. Then, the one-piece component composed of the pressure-sensitive rod 324, the first valve portion 322, the solenoid rod 313, and the movable core 312 is in a direction in which the first valve portion 322 opens the first valve hole 321d by the urging force of the compression coil spring 314. The first valve hole 321d (supply passage 145) is opened to the maximum opening, and the second valve hole 321e (second discharge passage 146b) is kept closed. At this time, the inclination angle of the swash plate 111 is minimized, the stroke amount of the piston 136 is minimized, and the discharge capacity of the variable displacement compressor 100 is minimized. And while the variable capacity compressor 100 is in a non-operation state, the state with the minimum discharge capacity is maintained.

  In the capacity control valve 300 according to the present embodiment, from the contact portion with the first valve hole opening peripheral edge 321b2 in the first contact portion 322c to the contact portion with the connection surface 323c of the second valve portion 323 in the intermediate portion 324a. The first distance L1 is set to a predetermined distance longer than the second distance L2 from the valve chamber one end wall 321b1 to the connection surface 323c in the second valve portion 323 in contact with the second valve hole opening peripheral edge 321g2. Yes. Therefore, when the entry portion 322b enters the first valve hole 321d, the first contact portion 322c contacts the first valve hole opening peripheral edge 321b2, and the first valve portion 322 closes the first valve hole 321d. The intermediate portion 324a of the pressure-sensitive rod 324 can be configured to press the connecting surface 323c of the second valve portion 323 so that the second valve portion 323 reliably opens the second valve hole 321e to the maximum opening. . Accordingly, when the first valve portion 322 closes the supply passage 145, the second valve portion 323 opens the discharge passage 146 to the maximum opening, so that the refrigerant discharge performance of the crank chamber 140 is improved, and the related art As with, the effectiveness of the air conditioner is faster.

  In the capacity control valve 300 according to the present embodiment, the third distance L3 from the tip of the entry portion 322b to the contact portion of the intermediate portion 324a with the connection surface 323c of the second valve portion 323 is equal to the straight hole 321d1. The distance is set to a predetermined distance equal to or less than a fourth distance L4 from the valve chamber side edge to the connecting surface 323c of the second valve portion 323 in contact with the second valve hole opening peripheral edge 321g2. For this reason, when the first valve portion 322 moves in the opening direction from the state in which the first valve hole 321d is closed, when the tip of the entry portion 322b reaches a position facing the valve chamber side edge of the straight hole portion 321d1 or Before reaching, the pressing from the intermediate portion 324a to the connecting surface 323c is released, and the second valve portion 323 abuts on the second valve hole opening peripheral edge 321g2 by the urging force from the urging member 326 to close the second valve hole 321e. . Therefore, when the first valve portion 322 moves in a direction to open the first valve hole 321d from a state where the tip of the entry portion 322b is located at a position facing the valve chamber side edge of the straight hole portion 321d1, When the opening degree of the first valve hole 321d is adjusted in an opening degree region equal to or larger than the minimum opening degree, the second valve hole 321e can be reliably maintained in the fully closed state. Therefore, when the refrigerant is supplied from the discharge chamber 142 to the crank chamber 140 by adjusting the opening of the first valve hole 321d in an opening range equal to or larger than the minimum opening, the first valve hole 321d from the discharge chamber 142 is supplied. It is possible to reliably prevent a part of the refrigerant introduced into the valve chamber 321b from passing through the second valve hole 321e from leaking into the suction chamber 141. As a result, it is possible to reliably improve the compression efficiency of the variable capacity compressor 100 as compared with the prior art.

  The second valve hole 321e connects the valve chamber 321b and the pressure sensing chamber 321g radially outward of the first valve hole 321d, and discharges the refrigerant in the crank chamber 140 to the suction chamber 141. It constitutes a part of the discharge passage 146 (second discharge passage 146b). Thereby, a part of the discharge passage 146 can be formed without going through the first valve portion 322 and the pressure-sensitive rod 324. Therefore, the outer diameter of the first valve portion 322 can be reduced. Here, the opening degree of the first valve hole 321d in the flow rate adjustment region is substantially the same as the second valve hole 321e and is formed by a gap between the distal end periphery of the entry portion 322b and the first valve hole opening periphery 321b2. It is determined by the channel area S ′ of the belt-like channel. Since the flow path area S ′ increases in proportion to the radius of the first valve hole 321d, when the lift amount of the first valve portion 322 is the same, the larger the radius of the first valve hole 321d (in other words, The larger the radius of the entry portion 322b of the first valve portion 322), the larger the amount of change in the opening of the first valve hole 321d with respect to the lift amount. As a result, it is difficult to adjust the minute flow rate. In this respect, since a part of the discharge passage 146 is not formed in the first valve portion 322, the outer diameter of the first valve portion 322 can be made smaller than the conventional one, so that the fine flow rate can be easily adjusted. Can be done.

  In the present embodiment, the third distance L3 is set shorter than the fourth distance L4. Thus, a region (overlap region) is provided in which the region where the opening degree of the first valve hole 321d is maintained at the minimum opening degree and the region where the second valve hole 321e is closed overlap each other. As a result, in this overlap region, it is possible to absorb variations such as the lift amount due to manufacturing tolerances of the first valve portion 322 and the like, and as a result, the first valve portion 322 increases the opening of the first valve hole 321d. The second valve hole 321e can be reliably maintained in the closed state when the adjustment is performed in an opening range larger than the minimum opening. Therefore, when the first valve portion 322 adjusts the opening degree of the first valve hole 321d in an opening degree region larger than the minimum opening degree, the refrigerant surely leaks to the refrigerant suction chamber 141 via the second valve hole 321e. Therefore, the compression efficiency of the variable capacity compressor 100 can be more reliably improved as compared with the prior art.

  In other words, the capacity control valve 300 according to the present embodiment is configured such that the relationship of L1> L4 (= L2)> L3 is established. Therefore, (i) when the first valve portion 322 closes the first valve hole 321d, the second valve portion 323 opens the second valve hole 321e to the maximum opening (see the position (a) in FIG. 6). (Ii) When the opening degree of the first valve hole 321d is adjusted in an opening range where the first valve part 322 is larger than the minimum opening degree larger than zero, the second valve part 323 is adjusted to the second valve hole 321e. (Iii) In the overlap region, the first valve portion 322 opens the first valve hole 321d with the minimum opening, and the second valve portion 323 is the second valve hole. 321e is closed (refer to the region between the positions (b) and (b ′) in FIG. 6), and (iv) the second valve portion 323 fully closes the opening of the second valve hole 321e from the maximum opening. While changing to the position, the first valve portion 322 maintains the opening degree of the first valve hole 321d substantially at the minimum opening degree ((a in FIG. 6 )) (Refer to the region between the position and (b) position).

  In the present embodiment, the pressure-sensitive rod 324 passes through the second valve portion 323 and is a circle that is supported by the cylindrical small-diameter portion 324b that contacts and separates from one end of the pressure-sensitive member 325, and the inner peripheral surface of the central hole 321f. The intermediate portion 324a is formed as an annular surface connecting the outer peripheral surface of the small diameter portion 324b and the outer peripheral surface of the large diameter portion 324c. Thereby, it is possible to realize a contact and separation structure of the integrally formed body of the solenoid rod 313, the first valve portion 322, and the pressure sensitive rod 324, and the second valve portion 323, and the pressure sensitive member 325 with a simple configuration. it can.

  In the present embodiment, the pressure-sensitive chamber one end wall 321g1 is flush with the second valve hole opening peripheral edge 321g2, and has an annular seat surface 321g3 formed around the central hole 321f. The second contact portion 323b penetrates through the second contact portion 323b, and the second contact portion 323b is formed in an annular shape corresponding to the annular seat surface 321g3 with the through hole 323a as a center, and is in contact with and away from the annular seat surface 321g3. It has surface 323b1. As a result, the second valve portion 323 can be stably seated and held by bringing the annular contact surface 323b1 into surface contact with the annular seating surface 321g3.

  In the present embodiment, the connecting surface 323c is configured by the through hole opening peripheral edge of the annular contact surface 323b1. Thereby, the connection structure of the 2nd valve part 323 and the pressure-sensitive rod 324 is realizable with a simple structure.

  In the present embodiment, the second valve portion 323 further includes a guide portion 323d that is slidably supported on the inner peripheral surface of the pressure sensitive chamber 321g, and the inner peripheral surface of the through hole 323a and the outer peripheral surface of the small diameter portion 324b. A gap is provided over the entire circumference. That is, when the first valve portion 322 adjusts the opening degree of the first valve hole 321d, the integrally formed body of the solenoid rod 313, the first valve portion 322, and the pressure sensitive rod 324 is connected to the second valve portion 323. While being separated from the surface 323c, the radial direction is also completely separated from the second valve portion 323. Therefore, it is possible to reliably prevent the second valve portion 323 from being inadvertently moved in the valve opening direction by the lift movement (operation) of the first valve portion 322.

  In the present embodiment, the biasing member 326 is provided between the second valve portion 323 and the pressure-sensitive member 325, and the pressure-sensitive member 325 is pressed against the pressure-sensitive chamber other end wall 321g4 by the biasing member 326. Yes. That is, the urging member 326 also has a function of holding the pressure sensitive member 325 on the pressure sensitive chamber other end wall 321g4. Thereby, the holding structure of the pressure-sensitive member 325 can be simplified.

  In the present embodiment, the third distance L3 is set to be shorter than the fourth distance L4. However, the third distance L3 may be the same as the fourth distance L4. Even in this case, the second valve hole 321e can be reliably maintained in the fully closed state when the opening degree of the first valve hole 321d is adjusted in the opening degree region equal to or larger than the minimum opening degree.

  Moreover, although the 1st valve hole 321d shall consist only of the straight hole part 321d1, it is not restricted to this. For example, the first valve hole 321d extends from the valve chamber side end edge of the straight hole portion 321d1 so as to expand in a tapered shape toward the valve chamber 321b, although not shown in the drawing, the straight hole portion 321d1 and the valve chamber 321b You may further have a taper hole part which connects between. Accordingly, by appropriately setting the inclination angle of the tapered hole portion, a desired opening degree characteristic of the first valve hole 321d (for example, change in opening degree of the first valve hole 321d with respect to the lift amount of the first valve part 322). Can be easily realized. In this case, the fourth distance L4 from the valve chamber side edge of the straight hole portion 321d1 to the connecting surface 323c in the second valve portion 323 in contact with the second valve hole opening peripheral edge 321g2 is the valve chamber one end wall 321b1. From the second distance L2 to the connecting surface 323c of the second valve portion 323 in contact with the second valve hole opening peripheral edge 321g2. In this case, the relationship L1> L2> L4> L3 is established.

  Moreover, although the 2nd valve part 323 shall have the guide part 323d slidably supported by the internal peripheral surface of the pressure sensitive chamber 321g, it is not restricted to this. For example, as shown in FIG. 7, a cylindrical rod guide portion 323e guided by the outer peripheral surface of the small diameter portion 324b may be provided on the other end surface of the second contact portion 323b. What is necessary is just to set the internal diameter of this rod guide part 323e to the same diameter as the through-hole 323a. Thereby, the integrally formed body of the solenoid rod 313, the first valve portion 322, and the pressure sensitive rod 324 can be lifted and moved smoothly.

  Although the case where the present invention is applied to a swash plate type variable displacement compressor using a crank chamber as a control pressure chamber for capacity control has been described above, the present invention is not limited thereto. The present invention can be widely applied to a variable capacity compressor having a configuration in which the discharge capacity is variably controlled by changing the pressure in the chamber.

  The present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Variable capacity compressor, 101a ... Cylinder bore (compression part), 136 ... Piston (compression part), 140 ... Crank chamber (control pressure chamber), 141 ... Suction chamber, 142 ... Discharge chamber, 145 ... Supply passage, 146 ... Discharge passage, 310 ... Solenoid unit, 321b ... Valve chamber, 321b1 ... One end wall of valve chamber, 321b2 ... First valve hole opening peripheral edge, 321d ... First valve hole, 321d1 ... First straight hole, 321e ... Second valve hole , 321g ... pressure sensing chamber, 321g1 ... pressure sensing chamber one end wall, 321g2 ... second valve hole opening peripheral edge, 321g3 ... annular seating surface, 321g4 ... pressure sensing chamber other end wall, 321f ... central hole, 322 ... first valve part 322b ... Entry portion, 322c ... first contact portion, 323 ... second valve portion, 323a ... through hole, 323b ... second contact portion, 323b1 ... annular contact surface, 323c ... connecting surface, 323d ... ga 324 ... Pressure sensitive rod (rod), 324a ... Intermediate portion, 324b ... Small diameter part, 324c ... Large diameter part, 325 ... Pressure sensitive member, 326 ... Biasing member, L1 ... First distance, L2 ... First 2 distance, L3 ... 3rd distance, L4 ... 4th distance

Claims (8)

A suction chamber into which the refrigerant before compression is guided; a compression unit that sucks and compresses the refrigerant in the suction chamber; a discharge chamber into which the compressed refrigerant compressed by the compression unit is discharged; and a control pressure chamber. A variable capacity compressor having a discharge capacity that changes in accordance with the pressure in the control pressure chamber, the capacity control valve of the variable capacity compressor used to adjust the pressure in the control pressure chamber;
A valve chamber always in communication with the control pressure chamber;
A pressure sensing chamber that is in constant communication with the suction chamber;
A supply passage for extending from the valve chamber one end wall of the valve chamber toward the pressure sensitive chamber and always communicating with the discharge chamber, and supplying refrigerant in the discharge chamber to the control pressure chamber. A first valve hole constituting a part;
The valve chamber and the pressure sensing chamber are connected radially outward of the first valve hole, and a part of a discharge passage for discharging the refrigerant in the control pressure chamber to the suction chamber is configured. Two valve holes,
A central hole extending continuously toward the pressure sensing chamber toward the pressure sensing chamber and opening in one end wall of the pressure sensing chamber on the valve chamber side in the pressure sensing chamber;
A first valve portion that is housed in the valve chamber and adjusts an opening degree of the first valve hole;
A second valve portion housed in the pressure sensitive chamber and adjusting the opening of the second valve hole;
It is formed integrally with the first valve portion, passes through the central hole, has one end connected to the first valve portion, and the other end penetrates the second valve portion and is located in the pressure sensitive chamber. The rod,
A solenoid unit for applying an electromagnetic force in a direction to close the first valve hole to the first valve portion;
A pressure-sensitive member that is housed in the pressure-sensitive chamber and expands and contracts in accordance with the pressure in the suction chamber, and extends as the pressure in the suction chamber decreases, and the first through the other end of the rod. A pressure-sensitive member that applies a biasing force in a direction to open the first valve hole to one valve portion;
A biasing member that applies a biasing force in a direction to close the second valve hole to the second valve portion;
Including
The first valve portion includes a columnar entry portion that enters the first valve hole, and a first entry portion that is provided at a proximal end portion of the entry portion and contacts and separates from a first valve hole opening peripheral edge of the valve chamber one end wall. 1 abutting part,
The second valve portion includes a second contact portion that contacts and separates from a peripheral edge of the opening of the second valve hole in the one end wall of the pressure sensing chamber, a through hole through which the other end portion of the rod passes, and an intermediate portion of the rod And a connecting surface that contacts and separates,
The first valve hole has a straight hole portion having an inner peripheral surface extending linearly facing the outer peripheral surface of the entering portion that has entered,
The gap between the outer peripheral surface of the entry portion and the inner peripheral surface of the straight hole portion defines a minimum flow path cross-sectional area for the supply passage,
The first distance from the contact portion of the first contact portion with the peripheral edge of the first valve hole opening to the contact portion of the intermediate portion with the connecting surface of the second valve portion is one end of the valve chamber. Set to a predetermined distance longer than a second distance from the wall to the connection surface of the second valve portion in contact with the peripheral edge of the second valve hole opening;
The third distance from the tip of the entry part to the contact part of the intermediate part with the connecting surface of the second valve part is from the valve chamber side edge of the straight hole part to the peripheral edge of the second valve hole opening. A capacity control valve that is set to a predetermined distance that is equal to or less than a fourth distance to the connection surface in the second valve portion that is in contact with the valve.   The capacity control valve according to claim 1, wherein the third distance is set shorter than the fourth distance. The rod is supported by an inner peripheral surface of the central hole, which has a cylindrical small-diameter portion that constitutes the other end portion and contacts and separates from one end of the pressure-sensitive member, and an outer diameter larger than the small-diameter portion. A cylindrical large-diameter portion,
The capacity control valve according to claim 1 or 2, wherein the intermediate portion of the rod is formed as an annular surface that connects between the outer peripheral surface of the small diameter portion and the outer peripheral surface of the large diameter portion. The one end wall of the pressure-sensitive chamber is flush with the peripheral edge of the second valve hole opening, and has an annular seating surface formed around the central hole,
The through hole penetrates the second contact portion,
The said 2nd contact part is formed in cyclic | annular form corresponding to the said annular seat surface centering | focusing on the said through-hole, and has an annular contact surface which contacts / separates to the said annular seat surface, Capacity control valve.   The capacity control valve according to claim 4, wherein the connection surface is constituted by a through-hole opening peripheral edge in the annular contact surface. The second valve portion further includes a guide portion slidably supported on the inner peripheral surface of the pressure sensitive chamber,
The capacity control valve according to any one of claims 3 to 5, wherein a gap is provided over the entire circumference between the inner peripheral surface of the through hole and the outer peripheral surface of the small diameter portion. The biasing member is provided between the second valve portion and the pressure sensitive member,
The capacity control valve according to claim 1, wherein the pressure-sensitive member is pressed against the pressure-sensitive chamber other end wall by the biasing member. A suction chamber into which the refrigerant before compression is guided;
A compression section that sucks and compresses the refrigerant in the suction chamber;
A discharge chamber into which the compressed refrigerant compressed by the compression unit is discharged;
A control pressure chamber;
And a variable capacity compressor whose discharge capacity changes according to the pressure of the control pressure chamber,
A variable capacity compressor comprising the capacity control valve according to claim 1.