WO2019139132A1 - Compresseur à capacité variable - Google Patents

Compresseur à capacité variable Download PDF

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Publication number
WO2019139132A1
WO2019139132A1 PCT/JP2019/000724 JP2019000724W WO2019139132A1 WO 2019139132 A1 WO2019139132 A1 WO 2019139132A1 JP 2019000724 W JP2019000724 W JP 2019000724W WO 2019139132 A1 WO2019139132 A1 WO 2019139132A1
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WO
WIPO (PCT)
Prior art keywords
valve
passage
port
chamber
pressure
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Application number
PCT/JP2019/000724
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English (en)
Japanese (ja)
Inventor
田口　幸彦
Original Assignee
サンデン・オートモーティブコンポーネント株式会社
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Publication of WO2019139132A1 publication Critical patent/WO2019139132A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/12—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having plural sets of cylinders or pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14—Control
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block

Definitions

  • variable displacement compression wherein the pressure in the control pressure chamber is adjusted and the discharge capacity is changed by supplying the refrigerant in the discharge chamber to the control pressure chamber and discharging the refrigerant in the control pressure chamber to the suction chamber.
  • the variable displacement compressor described in Patent Document 1 includes a first control valve that controls the opening degree of a pressure supply passage that communicates the discharge chamber with the crank chamber;
  • a second control including a spool having a first valve portion for opening and closing the pressure supply passage between the control valve and the crank chamber, and a second valve portion for opening and closing a pressure release passage communicating the crank chamber and the suction chamber. And a valve.
  • the second control valve controls the first valve portion of the spool to supply the pressure
  • the passage is opened to supply the refrigerant from the discharge chamber to the crank chamber, and the second valve portion of the spool is configured to minimize the opening degree of the pressure release passage.
  • the second control valve controls the first valve portion of the spool to The pressure supply passage is closed to prevent the backflow of the refrigerant from the crank chamber toward the first control valve, and the second valve portion of the spool is configured to maximize the opening degree of the pressure release passage.
  • the refrigerant in the crank chamber flows into the pressure supply passage between the first control valve and the second control valve via the internal passage of the spool having a passage cross-sectional area larger than that of the throttle passage. For this reason, the pressure in the pressure supply passage between the first control valve and the second control valve does not rapidly decrease to the pressure in the suction chamber, and as a result, the movement of the spool and, consequently, the pressure in the crank chamber There is a risk that the adjustment (reduction of the pressure in the crank chamber) may be delayed.
  • an object of this invention is to provide the variable displacement compressor which can prevent the delay of pressure adjustment of control pressure chambers, such as the said crank chamber.
  • the refrigerant in the discharge chamber is supplied to the control pressure chamber and the refrigerant in the control pressure chamber is discharged to the suction chamber, whereby the pressure in the control pressure chamber is adjusted to change the discharge capacity.
  • a variable displacement compressor is provided.
  • the variable displacement compressor is provided in a supply passage for supplying the refrigerant in the discharge chamber to the control pressure chamber, and controls the opening degree of the supply passage, and the control valve in the supply passage.
  • the switching valve provided on the control pressure chamber side, wherein an upstream passage between the control valve and the switching valve in the supply passage, and a distance between the switching valve in the supply passage and the control pressure chamber.
  • the switching valve includes: a switching valve that switches to a second state in which the refrigerant functions as a discharge passage for discharging the refrigerant into the suction chamber; and a throttle passage connecting the upstream passage and the suction chamber.
  • the switching valve includes a valve chamber having a first port communicating with the upstream passage, a second port communicating with the downstream passage, and a third port communicating with the suction chamber, and the valve chamber
  • a main valve body which is accommodated and moves in the valve chamber according to a difference between the pressure in the upstream passage and the pressure in the control pressure chamber, comprising a first internal passage, and the pressure in the upstream passage
  • the first port is opened and the third port is closed, and when the pressure of the upstream passage becomes lower than the pressure of the control pressure chamber, the third port is opened and the first It is a sub valve body which moves according to the difference between the pressure of the main valve which closes a port, the pressure of the upstream passage, and the pressure of the control pressure chamber, wherein the pressure of the upstream passage is the pressure of the control pressure chamber.
  • the first internal passage of the main valve body When the pressure is higher than the pressure, the first internal passage of the main valve body is opened, and And an auxiliary valve body which operates earlier than the main valve body to close the first internal passage of the main valve body when the pressure in the side passage becomes lower than the pressure in the control pressure chamber.
  • the refrigerant in the upstream passage flows into the valve chamber and flows out to the downstream passage via the first internal passage and the second port.
  • the refrigerant in the downstream passage is made to flow into the valve chamber and flow out into the suction chamber through the third port.
  • the second port is constituted by an internal space of a cylindrical member, and the sub valve body is movably accommodated in the internal space of the cylindrical member constituting the second port.
  • the sub valve body when the control valve is closed and the pressure in the upstream passage is lower than the pressure in the control pressure chamber, the sub valve body operates earlier than the main valve body. Closing the first internal passage of the main valve body; Therefore, the refrigerant in the control pressure chamber is suppressed from flowing into the upstream passage through the first internal passage, and the pressure in the upstream passage is rapidly reduced to the pressure in the suction chamber. As a result, the delay of the movement of the main valve body and the delay of the pressure adjustment (the decrease of the pressure) of the control pressure chamber accompanying this are suppressed.
  • the second port is constituted by an internal space of a cylindrical member, and the sub valve body is movably accommodated in the internal space of the cylindrical member constituting the second port. For this reason, stable and smooth movement of the sub valve body can be ensured.
  • FIG. 1 is a cross-sectional view of a variable displacement compressor according to a first embodiment of the present invention. It is a figure which shows typically the supply passage and the discharge passage (a 1st discharge passage, a 2nd discharge passage) of the said variable capacity compressor. It is a sectional view of a control valve of the variable displacement compressor. It is a figure which shows the relationship between the coil electricity supply amount in the said control valve, and setting pressure (suction chamber). It is sectional drawing of the switching valve of the said variable displacement compressor, (A) shows the state when the said control valve is valve opening, (B), when the said control valve is valve closing. It shows the state. It is sectional drawing of the valve chamber which comprises the said switching valve.
  • FIG. 7 is a cross-sectional view taken along line AA of FIG. It is sectional drawing of the main valve body which comprises the said switching valve. It is sectional drawing of the subvalve body which comprises the said switching valve. It is a principal part enlarged view of the said variable capacity compressor. It is operation
  • FIG. 15 shows the state when the said control valve is valve opening, (B), the state when the said valve is closed It shows.
  • FIG. 15 (B).
  • FIG. 15 shows the state when the said control valve is valve opening, (B), the said control valve is valve closing. Shows the state when It is sectional drawing of the valve chamber which comprises the switching valve of the variable displacement compressor which concerns on 2nd Embodiment.
  • FIG. 20 is a cross-sectional view taken along the line CC in FIG. It is sectional drawing of the main valve body which comprises the switching valve of the variable displacement compressor which concerns on 2nd Embodiment. It is sectional drawing of the modification of the switching valve of the variable displacement compressor which concerns on 2nd Embodiment.
  • FIG. 1 is a cross-sectional view of a variable displacement compressor according to a first embodiment of the present invention.
  • the variable displacement compressor according to the first embodiment is mainly configured as a clutchless compressor applied to an air conditioner system (air conditioner system) for a vehicle.
  • the upper side in FIG. 1 is the upper side in the direction of gravity
  • the lower side in FIG. 1 is the lower side in the direction of gravity.
  • variable displacement compressor 100 includes a cylinder block 101 having a plurality of cylinder bores 101 a annularly arranged, a front housing 102 provided at one end of the cylinder block 101, and the cylinder block 101. And a cylinder head 104 provided at the end via a valve plate 103.
  • the front housing 102, center gasket (not shown), cylinder block 101, cylinder gasket 152, suction valve forming plate 150, valve plate 103, discharge valve forming plate 151, head gasket 153, and cylinder head 104 are arranged in this order. And tightened by a plurality of through bolts 105 to form a compressor housing. Further, a crank chamber 140 is formed by the cylinder block 101 and the front housing 102, and a drive shaft 110 extending in the horizontal direction is provided so as to penetrate the crank chamber 140.
  • a swash plate 111 is disposed at an axial intermediate portion of the drive shaft 110.
  • the swash plate 111 is connected to a rotor 112 fixed to the drive shaft 110 via a link mechanism 120 and rotates with the drive shaft 110.
  • the swash plate 111 is configured to be changeable in angle (tilt angle of the swash plate 111) with respect to a plane orthogonal to the axis O of the drive shaft 110.
  • the link mechanism 120 includes a first arm 112 a protruding from the rotor 112, a second arm 111 a protruding from the swash plate 111, and one end of the link mechanism 120 with respect to the first arm 112 a via the first connection pin 122. And a link arm 121, the other end of which is rotatably coupled to the second arm 111a via the second coupling 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 in the range of the maximum tilt angle and the minimum tilt angle.
  • the through hole 111 b is formed with a minimum inclination restricting portion that abuts on the drive shaft 110. Assuming that the inclination angle of the swash plate 111 when the swash plate 111 is orthogonal to the drive shaft 110 is 0 °, the minimum inclination restricting portion of the through hole 111b is the drive shaft 110 when the inclination angle of the swash plate 111 becomes almost 0 °. It abuts, and it is formed so as to restrict further tilting of the swash plate 111. When the inclination angle of the swash plate 111 reaches the maximum inclination angle, the swash plate 111 abuts on the rotor 112 and the further inclination is restricted.
  • the drive shaft 110 is provided with an inclination reducing spring 114 for urging the swash plate 111 in a direction to reduce the inclination of the swash plate 111, and an inclination increasing spring 115 for urging the swash plate 111 in a direction to increase the inclination of the swash plate 111. And are worn.
  • the tilt angle reducing spring 114 is disposed between the swash plate 111 and the rotor 112, and the tilt angle increasing spring 115 is mounted between the swash plate 111 and a spring support member 116 fixed to the drive shaft 110.
  • the biasing force of the tilting angle increase spring 115 is set to be larger than the biasing force of the inclination angle reducing spring 114, and the drive shaft 110 is rotating.
  • the swash plate 111 is positioned at a tilt angle at which the biasing force of the tilt angle reducing spring 114 and the biasing force of the tilt angle increasing spring 115 are balanced.
  • One end side (the left end side in FIG. 1) of the drive shaft 110 penetrates the inside of a projecting portion 102 a of the front housing 102 that partially protrudes outward and extends 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.
  • the inside of the crank chamber 140 is shut off from the external space by a shaft seal device 130 provided in the projecting portion 102 a.
  • the other end side (right end side in FIG. 1) of the drive shaft 110 is inserted into a center bore 101 b formed in the cylinder block 101.
  • the center bore 101b penetrates the cylinder block 101 at the center of the plurality of cylinder bores 101a, and is a large diameter portion opened at the end face of the cylinder block 101 on the cylinder head 104 side from the valve plate 103 side toward the crank chamber 140 side.
  • a medium diameter portion 101b2 having a diameter smaller than that of the large diameter portion 101b1 and a small diameter portion 101b3 having a diameter smaller than the middle diameter portion 101b2 are provided.
  • a connecting body consisting of the drive shaft 110 and the rotor 112 fixed to the drive shaft 110 is supported by the first bearing 131 and the second bearing 132 in the radial direction, and in the thrust direction the third bearing 133 and the thrust receiving member 134 It is supported by The drive shaft 110 is configured to rotate in synchronization with the rotation of the power transmission device by transmitting power from an external drive source to the power transmission device.
  • the first bearing 131 is mounted inside the shaft sealing device 130 of the protruding portion 102 a of the front housing 102, and the second bearing 132 is mounted to the small diameter portion 101 b 3 of the center bore 101 b of the cylinder block 101.
  • the third bearing 133 is disposed between the inner surface of the front housing 102 and the rotor 112, and the thrust receiving member 134 is attached to the middle diameter portion 101 b 2 of the center bore 101 b of the cylinder block 101.
  • a piston 136 is accommodated in each cylinder bore 101a.
  • An outer peripheral portion of the swash plate 111 and the vicinity thereof are accommodated in an inner space formed in a projecting portion which protrudes into the crank chamber 140 of the piston 136, and the swash plate 111 receives the piston 136 via a pair of shoes 137. It is configured to work with. Then, by the rotation of the swash plate 111 accompanying the rotation of the drive shaft 110, each piston 136 reciprocates in the corresponding cylinder bore 101a.
  • a suction chamber 141 disposed at a central portion and a discharge chamber 142 annularly surrounding the suction chamber 141 are formed.
  • the suction chamber 141 and each cylinder bore 101 a communicate with each other through a communication hole 103 a provided in the valve plate 103 and a suction valve (not shown) formed in the suction valve forming plate 150.
  • the discharge chamber 142 and the cylinder bores 101 a communicate with each other through a discharge valve (not shown) formed in the discharge valve forming plate 151 and a communication hole 103 b provided in the valve plate 103.
  • a discharge check valve 200 is disposed in the discharge chamber 142.
  • the low pressure side refrigerant of the refrigerant circuit of the air conditioning system is led to the suction chamber 141 via the suction port 106 and the suction passage 107.
  • the refrigerant in the suction chamber 141 is sucked into the corresponding cylinder bore 101 a by the reciprocating motion of each piston 136, compressed and discharged into the discharge chamber 142. That is, in the present embodiment, the cylinder bore 101a and the piston 136 constitute a compression unit that sucks and compresses the refrigerant in the suction chamber 141.
  • the refrigerant discharged to the discharge chamber 142 (the refrigerant compressed by the compression unit) is led to the high pressure side of the refrigerant circuit of the air conditioner system via the discharge passage 108 and the discharge port 109. Further, the discharge check valve 200 prevents back flow of the refrigerant (refrigerant gas) from the high pressure side of the refrigerant circuit of the air conditioning system toward the discharge chamber 142.
  • variable displacement compressor 100 supplies the refrigerant in the discharge chamber 142 to the crank chamber 140, and the first discharge for discharging the refrigerant in the crank chamber 140 to the suction chamber 141.
  • a second discharge passage 147 FIG. 2 is a view schematically showing the supply passage 145, the first discharge passage 146, and the second discharge passage 147. As shown in FIG.
  • the supply passage 145 is formed as a passage connecting the discharge chamber 142 and the crank chamber 140, and the control valve 300 is provided in the middle of the supply passage 145.
  • the control valve 300 is configured to adjust the opening degree (passage cross-sectional area) of the supply passage 145, thereby controlling the amount of supply of the refrigerant (discharged refrigerant) in the discharge chamber 142 to the crank chamber 140. .
  • the first discharge passage 146 is formed as a passage for constantly communicating the crank chamber 140 and the suction chamber 141, and has a throttle portion in the middle thereof.
  • a switching valve 400 is provided on the crank chamber 140 side (downstream side) of the control valve 300 in the supply passage 145.
  • the switching valve 400 operates in conjunction with the opening and closing of the control valve 300, and the upstream passage 145 a between the control valve 300 and the switching valve 400 in the supply passage 145, the switching valve 400 and the crank chamber 140 in the supply passage 145. It is configured to be switched to a “first state” in which the downstream side passage 145 b is communicated and a “second state” in which the downstream side passage 145 b and the suction chamber 141 are communicated.
  • the switching valve 400 when the control valve 300 is open, the switching valve 400 is configured to be in the first state.
  • the upstream passage 145a and the downstream passage 145b communicate with each other, the refrigerant in the upstream passage 145a flows to the downstream passage 145b.
  • the discharge chamber 142 and the crank chamber 140 communicate with each other, and the refrigerant in the discharge chamber 142 is supplied to the crank chamber 140 through the supply passage 145, that is, through the upstream passage 145a and the downstream passage 145b. Be done.
  • the switching valve 400 is configured to be in the second state.
  • the communication between the upstream passage 145a and the downstream passage 145b is blocked.
  • the communication between the discharge chamber 142 and the crank chamber 140 is shut off.
  • the downstream side passage 145b and the suction chamber 141 communicate with each other, further, since the crank chamber 140 and the suction chamber 141 communicate with each other, the refrigerant in the crank chamber 140 passes through the downstream side passage 145b and flows into the suction chamber. It is discharged to 141.
  • the second discharge passage 147 including the downstream passage 145b which is a part of the supply passage 145 is formed (the downstream passage 145b which is a part of the supply passage 145 functions as a discharge passage).
  • the passage cross sectional area of the second discharge passage 147 is set larger than the passage cross sectional area of the narrowed portion of the first discharge passage 146.
  • the crank chamber 140 and the suction chamber 141 communicate with each other through the first discharge passage 146 and the second discharge passage 147, and the refrigerant in the crank chamber 140 is communicated with the first discharge passage 146 and the The gas flows through the discharge passage 147 and is discharged into the suction chamber 141. Therefore, the refrigerant in the crank chamber 140 is promptly discharged to the suction chamber 141, and the pressure in the crank chamber 140 is reduced. As the pressure in the crank chamber 140 decreases, the inclination angle of the swash plate 111 increases, and the stroke of the piston 136 (that is, the discharge capacity of the variable displacement compressor 100) also increases.
  • the crank chamber 140 and the suction chamber 141 are communicated only by the first discharge passage 146 having the throttling portion. That is, the refrigerant in the crank chamber 140 is limited to be discharged into the suction chamber 141, and the pressure in the crank chamber 140 is easily increased. Then, the refrigerant in the discharge chamber 142 is supplied to the crank chamber 140 via the supply passage 145 according to the degree of opening of the supply passage 145 by the control valve 300, and the pressure in the crank chamber 140 rises. As the pressure in the crank chamber 140 increases, the inclination angle of the swash plate 111 decreases and the stroke of the piston 136 (ie, the discharge capacity of the variable displacement compressor 100) also decreases.
  • the refrigerant in the discharge chamber 142 is supplied to the crank chamber 140 via the supply passage 145, and the inside of the crank chamber 140 via the first and second discharge passages 146 and 147.
  • the pressure of the crank chamber 140 is adjusted by discharging the refrigerant into the suction chamber 141, whereby the discharge capacity is changed. Therefore, in the present embodiment, the crank chamber 140 corresponds to the "control pressure chamber" of the present invention.
  • the upstream passage 145 a is in communication with the suction chamber 141 via the throttle passage 148. Further, lubricating oil is enclosed inside the variable displacement compressor 100. Then, the oil is agitated as the drive shaft 110 rotates, and the oil moves as the refrigerant moves, whereby the inside of the variable displacement compressor 100 is lubricated.
  • the control valve 300, the first discharge passage 146, the switching valve 400, the supply passage 145 (the upstream passage 145a, the downstream passage 145b), and the throttle passage 148 will be described in detail below.
  • FIG. 3 is a cross-sectional view of control valve 300. As shown in FIGS. 1 and 3, in the present embodiment, the control valve 300 is accommodated in an accommodation hole 104 a formed in the cylinder head 104. Three O-rings 300a to 300c are attached to the outer peripheral surface of the control valve 300. The outer space of the control valve 300 in the housing hole 104a is divided into first to third regions S1 to S3 by the three O-rings 300a to 300c.
  • the first region S1 communicates with the suction chamber 141 via a communication passage 104b (see FIG. 1) formed in the cylinder head 104.
  • the second region S2 communicates with the discharge chamber 142 through a communication passage 104c (see FIG. 1) formed in the cylinder head 104.
  • the third region S3 is formed via the communication passage 104d formed in the cylinder head 104, the switching valve 400, the large diameter portion 101b1 of the center bore 101b formed in the cylinder block 101, and the communication passage 101c formed in the cylinder block 101.
  • the crank chamber 140 is connected to the crank chamber 140 (see FIG. 1), and communicates with the crank chamber 140 when the switching valve 400 is in the first state. As described later, the second area S2 and the third area S3 form a part of the supply passage 145.
  • the control valve 300 includes a valve unit and a drive unit (solenoid) for opening and closing the valve unit, and flows to the solenoid according to the pressure of the suction chamber 141 introduced via the first region S1 and an external signal.
  • the opening degree of the supply passage 145 is controlled in response to the electromagnetic force generated by the current.
  • the valve unit of the control valve 300 has a cylindrical valve housing 301. Inside the valve housing 301, a first pressure sensing chamber 302, a valve chamber 303, and a second pressure sensing chamber 307 are formed in order in the axial direction from one end side (the bottom side of the accommodation hole 104a).
  • the first pressure sensing chamber 302 is in communication with the third region S3 in the accommodation hole 104a via a communication hole 301a formed on the outer peripheral surface of the valve housing 301.
  • the valve chamber 303 communicates with the second region S2 in the accommodation hole 104a via a communication hole 301b formed in the outer peripheral surface of the valve housing 301.
  • the second pressure sensing chamber 307 is in communication with the first region S1 in the housing hole 104a via a communication hole 301e formed on the outer peripheral surface of the valve housing 301.
  • the first pressure sensing chamber 302 and the valve chamber 303 communicate with each other through the valve hole 301 c, and a support hole 301 d is formed between the valve chamber 303 and the second pressure sensing chamber 307.
  • a bellows 305 is disposed in the first pressure sensing chamber 302.
  • the bellows 305 is evacuated internally and incorporates a spring.
  • the bellows 305 is disposed displaceably in the axial direction of the valve housing 301, and has a function as pressure sensing means for receiving the pressure in the first pressure sensing chamber 302, that is, the pressure in the crank chamber 140 mainly.
  • valve body 304 One end of a cylindrical valve body 304 is accommodated in the valve chamber 303.
  • the outer peripheral surface of the valve body 304 is slidably supported by the support hole 301 d, and the valve body 304 can move in the axial direction of the valve housing 301.
  • the said one end part of the valve body 304 comprises the valve part which opens and closes the valve hole 301c.
  • the other end of the valve body 304 protrudes into the second pressure sensing chamber 307, and constitutes a pressure receiving portion that receives the pressure in the second pressure sensing chamber 307, that is, the pressure in the suction chamber 141.
  • the second region S2 and the third region S3 correspond to the communication hole 301b, the valve chamber 303, the valve hole 301c, and the first pressure sensing chamber 302. And communicate with each other through the communication hole 301a. Then, as described later, the communication hole 301 b, the valve chamber 303, the valve hole 301 c, the first pressure sensing chamber 302, and the communication hole 301 a form a part of the supply passage 145.
  • a rod-like connecting portion 306 is formed to protrude.
  • the distal end portion of the connection portion 306 is connected to the bellows 305 so as to be capable of coming into contact with each other, and has a function as a transmission portion for transmitting the displacement of the bellows 305 to the valve body 304.
  • the drive unit has a cylindrical solenoid housing 312.
  • the solenoid housing 312 is connected to the other end of the valve housing 301 (opposite to the bottom side of the accommodation hole 104a).
  • a substantially cylindrical mold coil 314 in which an electromagnetic coil is covered with a resin is accommodated in the solenoid housing 312, and inside the mold coil 314, the fixed core 310 and movable which are accommodated in the bottomed cylindrical accommodation member 313
  • a core 308 is housed.
  • the housing member 313 is disposed with its open end facing the valve housing 301.
  • the fixed core 310 has a protrusion 310 a protruding from the open end of the housing member 313.
  • the projecting portion of the fixed core 310 is fitted in a fitting hole 301 f formed in the valve housing 301, and the tip surface of the projecting portion 310 a constitutes a wall surface of the second pressure sensing chamber 307.
  • the fixed core 310 has an insertion hole 310 b.
  • the insertion hole 310b penetrates the fixed core 310 in the longitudinal direction, one end of the insertion hole 310b is opened at the end face of the protrusion 310a, and the other end of the insertion hole 310b is opposite to the protrusion 310a.
  • the end face of the fixed core 310 is open.
  • the solenoid rod 309 is inserted into the insertion hole 310b with a gap.
  • One end of the solenoid rod 309 is fixed to the end face of the other end of the valve body 304, and the other end of the solenoid rod 309 is fitted (press-fit) in a through hole formed in the movable core 308. That is, the valve body 304, the movable core 308 and the solenoid rod 309 are integrated.
  • a forced release spring 311 is provided to bias.
  • the movable core 308, the fixed core 310 and the solenoid housing 312 are formed of a magnetic material to constitute a magnetic circuit.
  • the housing member 313 is formed of a nonmagnetic material such as a stainless steel material.
  • the mold coil 314 is connected to a control device (not shown) provided outside the variable displacement compressor 100 via a signal line or the like.
  • the drive unit generates an electromagnetic force F (I) when the control current I is supplied to the mold coil 314 from the controller.
  • F (I) the electromagnetic force F (I)
  • the movable core 308 is attracted toward the fixed core 310, and the valve body 304 moves in the valve closing direction.
  • valve body 304 of the control valve 300 in addition to the electromagnetic force F (I) generated by the drive unit, the force by the biasing force f by the forced release spring 311 and the pressure by the pressure of the valve chamber 303 (pressure Pd of the discharge chamber 142)
  • the force due to the pressure of the first pressure sensing chamber 302 (pressure Pc of the crank chamber 140), the force due to the pressure of the second pressure sensing chamber 307 (pressure Ps of the suction chamber 141), and the biasing force F due to the spring built in the bellows 305 Works.
  • the connection body of the bellows 305, the connection portion 306 and the valve body 304 increases the discharge capacity, thereby increasing the valve hole 301c (ie, the supply passage 145) to reduce the pressure in the crank chamber 140 and to decrease the discharge volume when the pressure in the suction chamber 141 falls below the set pressure, the valve hole 301 c (ie, The pressure in the crank chamber 140 is increased by increasing the opening degree of the supply passage 145). That is, the control valve 300 autonomously controls the opening degree of the supply passage 145 so that the pressure in the suction chamber 141 approaches the set pressure.
  • the control device controls energization of the mold coil 314 by pulse width modulation (PWM control) at a predetermined frequency in the range of 400 Hz to 500 Hz, for example, and pulses so that the current value flowing through the mold coil 314 becomes a desired value. Change the width (duty ratio).
  • PWM control pulse width modulation
  • First discharge passage 146 In the present embodiment, the first discharge passage 146 is formed by a communication passage 101d formed in the cylinder block 101 and a throttle passage (fixed throttle) 103c formed in the valve plate 103 (see FIG. 1).
  • FIG. 5 is a cross-sectional view of the switching valve 400.
  • FIG. 5A shows the state of the switching valve 400 when the control valve 300 opens the valve hole 301c (ie, when the valve hole 301c is open)
  • FIG. 5B shows the state where the control valve 300 is a valve.
  • the state of the switching valve 400 is shown when the hole 301 c is closed (that is, when the valve is closed).
  • the switching valve 400 includes a valve chamber 410, a main valve body 420, and a sub valve body 430.
  • FIG. 6 is a cross-sectional view of the valve chamber 410.
  • the valve chamber 410 is mainly formed by an accommodation hole 104 e provided in the cylinder head 104.
  • the accommodation hole 104 e is formed as a substantially cylindrical hole opened at an end face of the cylinder head 104 on the cylinder block 101 side.
  • the accommodation hole 104e is adjacent to the suction chamber 141 and has a large diameter of the center bore 101b formed in the cylinder block 101 with the intervening member interposed therebetween. It is provided to face the portion 101b1.
  • the interposed member is a member interposed between the cylinder block 101 and the cylinder head 104, and includes a suction valve forming plate 150, a valve plate 103, a discharge valve forming plate 151, a head gasket 153, and the like.
  • a portion around the opening of the accommodation hole 104 e in the cylinder head 104 is in contact with the head gasket 153, and the opening of the accommodation hole 104 e is closed by the discharge valve forming plate 151.
  • the bottom surface of the housing hole 104e forms one end wall surface 411 of the valve chamber 410
  • the opening of the housing hole 104e in the surface on the cylinder head 104 side of the discharge valve forming plate 151 is A portion to be closed forms the other end wall surface 412 of the valve chamber 410 opposite to the one end wall surface 411.
  • the inner peripheral surface of the accommodation hole 104 e forms a peripheral wall surface 413 of the valve chamber 410.
  • a cylindrical guide sleeve (cylindrical member) 414 is fixed to a portion of the valve plate 103 located between the valve chamber 410 and the large diameter portion 101 b 1 of the center bore 101 b.
  • the guide sleeve 414 is fixed by fitting the middle portion in the longitudinal direction to the through hole 103 d formed in the valve plate 103, and in the valve chamber 410, the other end wall 412 to the one end wall 411 side And a second protrusion 414 b that protrudes into the large diameter portion 101 b 1 of the center bore 101 b formed in the cylinder block 101.
  • the inner space 414c of the guide sleeve 414 is a small diameter space portion having a smaller diameter than the large diameter space portion 414c1 on the side of the first protrusion 414a and the large diameter space portion 414c1 on the side of the second protrusion 414b. And 414 c 2.
  • One end of the communication passage 104 d is opened as a first port 501 on the one end wall surface 411 of the valve chamber 410.
  • the other end of the communication passage 104 d is open to the third region S 3 in the accommodation hole 104 a for accommodating the control valve 300. That is, the communication passage 104 d is a passage between the control valve 300 and the switching valve 400, and the first port 501 is in communication with the communication passage 104 d between the control valve 300 and the switching valve 400.
  • the inner space 414c of the guide sleeve 414 constitutes a second port 502 communicating with the large diameter portion 101b1 of the center bore 101b.
  • the third port 503 and the fourth port 504 are opened in the other end wall surface 412 of the valve chamber 410.
  • the third port 503 is suctioned through a communication passage 505 formed by a groove formed in the valve plate 103 and the discharge valve formation plate 151 and a communication hole 506 penetrating the discharge valve formation plate 151 and the head gasket 153. It communicates with the chamber 141.
  • the fourth port 504 is formed as a recess whose bottom surface is the surface on the discharge valve forming plate 151 side of the valve plate 103.
  • FIG. 7 is an enlarged view of the AA cross section of FIG.
  • the second port 502 (inner space 414 c of the guide sleeve 414) is located approximately at the center of the other end wall surface 412 of the valve chamber 410, and the third port 503 is a second port. It is located above the port 502 in FIG.
  • the third port 503 is formed as an arc-shaped hole extending along the outer peripheral surface of (the first protrusion 414 a of) the guide sleeve 414.
  • the fourth port 504 is concentric with the guide sleeve 414 and is formed as a semicircular recess having a diameter larger than that of the guide sleeve 414, and is located below the third port 503 in FIG.
  • the opening area of the fourth port 504 is set to be larger than the opening area of the third port 503.
  • the main valve body 420 is configured to be accommodated in the valve chamber 410 and to move between the one end wall surface 411 and the other end wall surface 412.
  • FIG. 8 is a cross-sectional view of the main valve body 420.
  • the main valve body 420 includes a first valve portion 421 provided on the one end wall surface 411 side, and the other end wall surface 412. It has the 2nd valve part 422 provided in the side, and the internal passage (it is called the following "1st internal passage") 423 formed in the inside.
  • the first valve portion 421 is formed in a cylindrical shape extending in the moving direction of the main valve body 420.
  • the first valve portion 421 has an end surface 421 a that is in contact with the one end wall surface 411.
  • the second valve portion 422 extends in the moving direction of the main valve body 420 and is formed in a cylindrical shape having a diameter larger than that of the first valve portion 421.
  • the second valve portion 422 has an end surface 422 a that is in contact with the other end wall surface 412.
  • a receiving hole 422b for receiving the first protrusion 414a of the guide sleeve 414 is formed.
  • the accommodation hole 422 b is formed such that the depth thereof is greater than the height (protrusion length) of the first protrusion 414 a of the guide sleeve 414 from the other end wall surface 412.
  • at least one groove 422c extending in the depth direction is formed on the inner peripheral surface of the housing hole 422b.
  • a plurality of (for example, four) grooves 422c extending in the depth direction of the accommodation hole 422b are formed at equal intervals in the circumferential direction on the inner peripheral surface of the accommodation hole 422b.
  • the first internal passage 423 is open at one end on the bottom of the accommodation hole 422b and extends inside the main valve body 420 (mainly the first valve portion 421) in the moving direction of the main valve body 420 and the other end is closed. It includes a first passage portion 423a, and at least one second passage portion 423b, one end of which opens at the side surface of the first valve portion 421 and the other end of which opens at the first passage portion 423a.
  • the first internal passage 423 communicates the valve chamber 410 with the accommodation hole 422 b.
  • a plurality of (for example, four) second passage portions 423 b are formed at equal intervals in the circumferential direction.
  • the main valve body 420 slides the outer peripheral surface of the first protrusion 414 a of the guide sleeve 414 by the inner peripheral surface of the accommodation hole 422 b formed in the second valve portion 422. It is configured to move between the one end wall surface 411 and the other end wall surface 412.
  • the opening end of the accommodation hole 422b is formed between the inner peripheral surface of the accommodation hole 422b formed in the second valve portion 422 of the main valve body 420 and the outer peripheral surface of the first projection 414a of the guide sleeve 414.
  • at least one passage portion 440 is formed by at least one groove 422c formed in the inner peripheral surface of the accommodation hole 422b.
  • the gap between the inner peripheral surface of the accommodation hole 422b and the outer peripheral surface of the first projecting portion 414a may be at least one passage portion 440, or the first projecting portion 414a.
  • At least one passage portion 440 may be formed by at least one groove formed on the outer circumferential surface of
  • One end of the main valve body 420 is restricted by the end surface 421a of the first valve portion 421 coming into contact with the one end wall surface 411 of the valve chamber 410, and the end surface 422a of the second valve portion 422 is the valve chamber 410. By contacting the other end wall surface 412, the movement of the other is restricted.
  • the end surface 421a of the first valve portion 421 when the end surface 421a of the first valve portion 421 abuts on the one end wall surface 411, the end surface 422a of the second valve portion 422 is separated from the other end wall surface 412, and the second valve portion When the end surface 422 a of the second valve 422 abuts on the other end wall surface 412, the end surface 421 a of the first valve portion 421 is configured to be separated from the one end wall surface 411.
  • the end surface 421a of the first valve portion 421 abuts on the one end wall surface 411 and the first valve portion 421 closes the first port 501
  • the end surface 422a of the second valve portion 422 is the other end wall surface 412.
  • the third port 503 is opened and the second port 502 and the third port 503 communicate with each other through the accommodation hole 422b, the at least one passage portion 440, and the valve chamber 410 (see FIG. 5B). reference).
  • the end surface 421a of the first valve portion 421 is the one end wall surface 411.
  • the first port 501 is opened, and the first port 501 and the second port 502 communicate with each other through the valve chamber 410, the first internal passage 423, and the accommodation hole 422b (see FIG. 5A).
  • the opening of the fourth port 504 is covered by (the end surface 422a of) the second valve portion 422, but the fourth port 504 is connected to the second valve portion 422 via the at least one passage portion 440 and the accommodation hole 422b. It communicates with the 2 port 502.
  • the main valve body 420 may be formed of, for example, a metal or a resin material, but is preferably formed of a resin material for weight reduction.
  • a resin material polyphenylene sulfide (PPS) resin, nylon (polyamide) resin, etc. may be suitably selected as the resin material.
  • the sub valve body 430 is accommodated in the internal space 414 c of the guide sleeve 414 and moves the internal space 414 c of the guide sleeve 414 in the axial direction of the guide sleeve 414. That is, the sub valve body 430 is configured to move in the second port 502.
  • FIG. 9 is a cross-sectional view of the sub valve 430.
  • the sub valve body 430 has an insertion portion 431 provided on one end side and a valve portion provided on the other end side (hereinafter referred to as 3), a sliding portion 433 provided between the insertion portion 431 and the third valve portion 432, and an internal passage (hereinafter referred to as a "second internal passage") 434 formed therein. And.
  • the insertion portion 431 is formed in a cylindrical shape extending in the moving direction of the sub valve body 430, and is inserted into the small diameter space portion 414 c 2 of the guide sleeve 414.
  • the third valve portion 432 is formed in a cylindrical shape extending in the moving direction of the sub valve body 430, and the end face 432a of the accommodation hole 422b formed in the second valve portion 422 of the main valve body 420 is in contact with the bottom surface.
  • the sliding portion 433 extends in the moving direction of the sub valve body 430 and is formed in a cylindrical shape having a diameter larger than that of the insertion portion 431 and the valve portion 432.
  • the outer peripheral surface (mainly the lower portion) of the sliding portion 433 slides on (the main lower portion) of the large diameter space portion 414c1 of the guide sleeve 414. It is configured to move in the internal space 414 c (second port 502) of the guide sleeve 414.
  • the second internal passage 434 has a first passage portion 434a whose one end is open to the end face 431a of the insertion portion 431 and which extends inside the sub valve body 430 in the moving direction of the sub valve body 430 and whose other end is closed; And at least one second passage portion 434b open at the side surface of the valve portion 432 and the other end opening at the first passage portion 434a.
  • a plurality of (for example, four) second passage portions 434b are formed at equal intervals in the circumferential direction.
  • the movement of one side of the sub valve body 430 is restricted by the end face 432 a of the third valve portion 432 coming into contact with the bottom surface of the accommodation hole 422 b formed in the second valve portion 422 of the main valve body 420.
  • the end face 433a of the insertion portion 431 on the 433 side abuts on the step portion 414c3 (see FIG. 6) between the large diameter space portion 414c1 and the small diameter space portion 414c2 of the guide sleeve 414, thereby restricting the other movement.
  • the end face 432a of the third valve portion 432 abuts on the bottom surface of the accommodation hole 422b formed in the second valve portion 422 of the main valve body 420, the end face 433a of the sliding portion 433 is stepped
  • the end surface 432a of the third valve portion 432 is configured to be separated from the bottom surface of the accommodation hole 422b of the main valve body 420 when it is separated from the portion 414c3 and the end surface 433a of the sliding portion 433 abuts on the step portion 414c3.
  • the first internal passage 423 of the main valve body 420 (specifically, The open end of the first passage portion 423a is closed.
  • the end face 432a of the third valve portion 432 is separated from the bottom surface of the accommodation hole 422b formed in the second valve portion 422 of the main valve body 420, the first internal passage 423 of the main valve body 420 is opened.
  • the first internal passage 423 of the body 420 communicates with the internal space 414c (second port 502) of the guide sleeve 414 through the accommodation hole 422b.
  • first internal passage 423 of the main valve body 420 passes through the accommodation hole 422 b and the large diameter space portion 414 c 1 (second port 502) of the guide sleeve 414, and the second internal passage 434 of the auxiliary valve body 430. It communicates with
  • the sub valve body 430 may be formed of, for example, a metal or a resin material, but is movable than the main valve body 420 so that the main valve body 420 can be moved by a smaller force. It is lightweight.
  • the moving direction of the auxiliary valve body 430 on at least one of the outer peripheral surface of the auxiliary valve body 430 and the inner peripheral surface of the guide sleeve 414 may be formed.
  • providing the second internal passage 434 in the auxiliary valve body 430 is preferable because the auxiliary valve body 430 can be further reduced in weight while securing a pressure receiving area.
  • the end face 432a of the third valve portion 432 is separated from the bottom surface of the accommodation hole 422b formed in the second valve portion 422 of the main valve body 420, and the end face 433 a of the sliding portion 433 is stepped.
  • the first internal passage 423 of the main valve body 420 is opened by contacting the portion 414c3.
  • the communication passage 104d and the large diameter portion 101b1 of the center bore 101b are the first port 501, the valve chamber 410, and the first internal passage 423 of the main valve body 420.
  • the accommodation hole 422b of the main valve body 420, the second port 502 (specifically, the large diameter space portion 414c1 of the guide sleeve 414, the second internal passage 434 of the sub valve body 430, and the small diameter space portion 414c2 of the guide sleeve 414) It communicates through
  • the discharge chamber 142 and the crank chamber 140 are the communication passage 104c, the second region S2 of the accommodation hole 104a, the control valve 300 (communication hole 301b, valve chamber 303, valve hole 301c, first pressure sensing chamber 302 and communication hole 301a), third region S3, communication passage 104d, switching valve 400 (first port 501, valve chamber 410, internal passage 423 of main valve body 420, main valve body 420 Housing hole 422b, large diameter space portion 414c1 (second port 502) of guide sleeve 414, second internal passage 434 of sub valve body 430, small diameter space portion 414c2 (second port 502) of guide sleeve 414, center bore 101b
  • the refrigerant in the discharge chamber 142 is supplied to the crank chamber 140 through the first passage formed of the large diameter portion 101b1 and the communication passage 101c.
  • the supply passage 145 is formed by the first passage.
  • the third region S3 and the communication passage 104d form the upstream passage 145a between the control valve 300 and the switching valve 400 in the supply passage 145, and the supply passage 145 by the large diameter portion 101b1 of the center bore 101b and the communication passage 101c.
  • a downstream side passage 145 b between the switching valve 400 and the crank chamber 140 at the position is formed.
  • the main valve body 420 has an end surface 422 a of the second valve portion 422 of the valve chamber 410. While opening from the other end wall surface 412 and opening the third port 503, the end surface 421a of the first valve portion 421 abuts against the one end wall surface 411 of the valve chamber 410 and closes the first port 501. Further, in the sub-valve body 430, the end face 433a of the sliding portion 433 is separated from the step portion 414c3, and the end face 432a of the third valve portion 432 is in contact with the bottom surface of the accommodation hole 422b of the main valve body 420. The first internal passage 423 of 420 is closed.
  • the large diameter portion 101b1 of the center bore 101b and the suction chamber 141 are connected to the second port 502 (specifically, the small diameter space portion 414c2 of the guide sleeve 414).
  • the chamber 410 communicates with the third port 503 through the communication passage 505 and the communication hole 506.
  • the crank chamber 140 and the suction chamber 141 include the communication passage 101c, the large diameter portion 101b1 of the center bore 101b, the switching valve 400 (small diameter space portion 414c2 of the guide sleeve 414 (second port 502)) and the sub valve 430 2 internal passage 434, large diameter space portion 414c1 (second port 502) of guide sleeve 414, accommodation hole 422b of main valve body 420, at least one passage portion 440, valve chamber 410, third port 503), communication passage 505 And the communication passage 506, and the refrigerant in the crank chamber 140 is discharged to the suction chamber 141 via the second passage. That is, the second discharge passage 147 is formed by the second passage.
  • downstream passage 145 b (the large diameter portion 101 b 1 of the center bore 101 b and the communication passage 101 c) between the switching valve 400 and the crank chamber 140 in the supply passage 145 functions as a part of the second discharge passage 147. ing.
  • FIG. 10 is an enlarged view of an essential part of FIG.
  • the communication passage 104d constituting the upstream passage 145a between the control valve 300 and the switching valve 400 in the supply passage 145 is an end surface of the cylinder head 104 on the cylinder block 101 side.
  • the second communication portion 104 d 3 that communicates the valve chamber 410 of the switching valve 400.
  • the throttle passage 148 is formed to communicate the space portion 104d1 with the suction chamber 141.
  • the throttle passage 148 corresponds to the first through hole 153a penetrating the head gasket 153 and the discharge valve forming plate 151 at the position corresponding to the space portion 104d1, and the suction chamber 141.
  • the second through hole 153b which penetrates the head gasket 153 and the discharge valve forming plate 151 at the same position, and the communication groove 103e which is formed in the valve plate 103 and communicates the first through hole 153a and the second through hole 153b. It is done.
  • One end side of the main valve body 420 receives the pressure Pm of the communication passage 104 d (the upstream passage 145 a between the control valve 300 and the switching valve 400 in the supply passage 145), and the other end side of the main valve body 420 is The pressure of the large diameter portion 101b1 of the bore 101b (the downstream passage 145b between the switching valve 400 and the crank chamber 140 in the supply passage 145), that is, the pressure Pc of the crank chamber 140 is received.
  • FIG. 11 is a diagram for describing the operation of the switching valve 400 when the control valve 300 is opened (that is, when the valve closing state is changed to the valve opening state).
  • the control valve 300 When the control valve 300 is opened, the refrigerant in the discharge chamber 142 is supplied to the communication passage 104d (the upstream passage 145a), the pressure Pm of the communication passage 104d is increased, and the pressure Pm of the communication passage 104d is larger than the center bore 101b.
  • the pressure is higher than the pressure Pc of the crank chamber 140, which is the pressure of the diameter portion 101b1 (downstream passage 145b).
  • the main valve body 420 moves in the valve chamber 410 by the force due to the pressure difference (Pm-Pc), and the end surface 421a of the first valve portion 421
  • the first port 501 is opened apart from the one end wall surface 411 of the valve chamber 410, and the end surface 422a of the second valve portion 422 abuts on the other end wall surface 412 of the valve chamber 410 to close the third port 503.
  • the sub valve body 430 moves in the internal space 414 c (second port 502) of the guide sleeve 414, and the end face 432 a of the third valve portion 432 is formed in the second valve portion 422 of the main valve body 420.
  • the first internal passage 423 of the main valve body 420 is opened apart from the bottom surface of the hole 422b.
  • the communication passage 104d (the upstream passage 145a) and the large diameter portion 101b1 (the downstream passage 145b) of the center bore 101b are the first port 501, the valve chamber 410, and the first internal passage 423 of the main valve body 420,
  • the accommodation hole 422b formed in the second valve portion 422 of the main valve body 420, the large diameter space portion 414c1 (second port 502) of the guide sleeve 414, the second internal passage 434 of the sub valve body 430, and the small diameter of the guide sleeve 414 Communication is performed via the space 414 c 2 (second port 502).
  • the refrigerant in the communication passage 104 d (upstream passage 145 a) flows from the first port 501 into the valve chamber 410, and the refrigerant flowing into the valve chamber 410 is the main valve body 420. And flow through the first internal passage 423.
  • the refrigerant having passed through the first inner passage 423 further passes through the accommodation hole 422b, the second port 502 (the inner space 414c of the guide sleeve 414) and the second inner passage 434 of the sub valve body 430, and more specifically Through the accommodation hole 422b, the large diameter space portion 414c1 (second port 502) of the guide sleeve 414, the second internal passage 434 of the sub valve body 430, and the small diameter space portion 414c2 (second port 502) of the guide sleeve 414. , And flows out to the large diameter portion 101b1 (downstream passage 145b) of the center bore 101b.
  • the switching valve 400 is in the first state in which the upstream passage 145a and the downstream passage 145b communicate with each other to flow the refrigerant in the upstream passage 145a to the downstream passage 145b. Then, the switching valve 400 maintains the first state while the control valve 300 is open.
  • FIGS. 12 to 14 are diagrams for explaining the operation of the switching valve 400 when the control valve 300 is closed (ie, changed from the open state to the open state).
  • the control valve 300 When the control valve 300 is closed, the refrigerant in the discharge chamber 142 is not supplied to the communication passage 104 d (upstream passage 145 a), and the communication passage 104 d (upstream passage 145 a) is discharged through the throttle passage 148. It is in communication with Therefore, the pressure Pm of the communication passage 104d (upstream passage 145a) becomes lower than the pressure Pc of the crank chamber 140 which is the pressure of the large diameter portion 101b1 (downstream passage 145b) of the center bore 101b. Then, as shown by the arrow in FIG.
  • the sub valve body 430 When the backflow of the refrigerant occurs, as shown in FIG. 13, first, the sub valve body 430 is pressed and moved by the back flow of the refrigerant, and the end face 432 a of the third valve portion 432 of the sub valve body 430 is the main valve body
  • the first internal passage 423 of the main valve body 420 is closed by coming into contact with the bottom surface of the accommodation hole 422 b formed in the second valve portion 422 of 420. For this reason, the backflowed refrigerant does not flow into the communication passage 104d (the upstream passage 145a), and the pressure Pm of the communication passage 104d (the upstream passage 145a) reliably and promptly decreases to the pressure Ps of the suction chamber 141.
  • the third port 503 is opened and the first port 501 is closed, the communication between the communication passage 104d (upstream passage 145a) and the large diameter portion 101b1 (downstream passage 145b) of the center bore 101b is blocked.
  • the second port 502 and the third port 503 communicate with each other through at least one passage portion 440 and the valve chamber 410.
  • the refrigerant in the large diameter portion 101b1 (downstream side passage 145b) of the center bore 101b is the small diameter space portion 414c2 (second port 502) of the guide sleeve 414, the sub valve body 430 Flow through the second internal passage 434, the large diameter space 414c1 (second port 502) of the guide sleeve 414, the receiving hole 422b and the at least one passage 440 into the valve chamber 410 and into the valve chamber 410.
  • the refrigerant flows out to the suction chamber 141 through the third port 503, the communication passage 505 and the communication hole 506.
  • the switching valve 400 causes the downstream passage 145 b to communicate with the suction chamber 141 and causes the downstream passage 145 b to function as a discharge passage for discharging the refrigerant in the crank chamber 140 to the suction chamber 141. It becomes. Then, the switching valve 400 maintains the second state while the control valve 300 is closed.
  • the one end wall surface 411 of the valve chamber 410 corresponds to the “first wall surface of the valve chamber” of the present invention
  • the other end wall surface 412 of the valve chamber 410 corresponds to the “first valve wall of the valve chamber”. It corresponds to "2 wall surface”.
  • the sub valve body 430 is the main valve. Operating prior to the body 420, it closes the first internal passage 423 of the main valve body 420. Therefore, the pressure Pm in the communication passage 104d (upstream passage 145a) reliably and promptly decreases to the pressure Ps in the suction chamber 141 to prevent a delay in the movement of the main valve body 420, and the switching valve 400 The state is quickly switched to the second state. Therefore, the refrigerant in crank chamber 140 is promptly discharged to suction chamber 141, and pressure Pc in crank chamber 140 is reduced. That is, the delay of the pressure adjustment of the crank chamber 140 (drop of the pressure of the crank chamber 140) is prevented.
  • the sub valve body 430 is configured to move in the cylindrical guide sleeve 414, stable and smooth movement of the sub valve body 430 is ensured.
  • the fourth port 504 formed on the other end wall surface 412 of the valve chamber 410 includes the at least one passage portion 440, the accommodation hole 422b, and the large diameter space portion 414c1 of the guide sleeve 414 (second Communicating with the large diameter portion 101b1 (downstream passage 145b) of the center bore 101b via the port 502), the second internal passage 434 of the sub valve body 430, and the small diameter space portion 414c2 (second port 502) of the guide sleeve 414; There is.
  • the pressure Pc of the crank chamber 140 is guided to the end surface 422 a of the second valve portion 422, and the portion corresponding to the fourth port 504 in the end surface 422 a of the second valve portion 422 of the main valve body 420 is the crank chamber 140.
  • the pressure receiving portion receives the pressure Pc (the pressure Pc of the crank chamber 140 acts on the second valve portion 422). Since the opening area of the fourth port 504 is set larger than the opening area of the third port 503, the pressure receiving area of the pressure Pc of the crank chamber 140 in the main valve body 420 can be increased.
  • the fourth port 504 corresponds to the “voltage introduction port” of the present invention.
  • the first protrusion 414 a of the guide sleeve 414 is accommodated in the accommodation hole 422 b formed in the second valve 422 of the main valve body 420, the first protrusion 414 a is provided. An increase in the axial length of the switching valve 400 due to the above can be suppressed.
  • the inner peripheral surface of the housing hole 422b slides on the outer peripheral surface of the first protrusion 414a of the guide sleeve 414, whereby the one end wall surface 411 of the valve chamber 410 and the other end It is configured to move between the wall surface 412 and the wall surface 412.
  • the main valve body 420 is movably supported on the outer peripheral surface of the guide sleeve 414 and is not in contact with the peripheral wall surface 413 of the valve chamber 410. For this reason, the sliding resistance at the time of the movement of the main valve body 420 is suppressed, and the stable movement of the main valve body 420 is ensured.
  • the main valve body 420 is positioned by the first protrusion 414 a of the guide sleeve 414, assembly of the switching valve 400 is easy.
  • the third port 503 is formed as an arc-shaped hole extending along the outer peripheral surface of the first protrusion 414 a of the guide sleeve 414, and the fourth port 504 is concentric with the guide sleeve 414. And, it is formed as a semicircular recess having a diameter larger than that of the guide sleeve 414. For this reason, in each of the third port 503 and the fourth port 504, the enlargement of the main valve body 420 and hence the switching valve 400 can be suppressed while securing the required opening area. However, it is not limited to this.
  • the third port 503 may be formed by a plurality of holes disposed along the outer circumferential surface of the first protrusion 414 a of the guide sleeve 414. That is, the third port 503 may be opened to the other end wall surface 412 of the valve chamber 410 so as to be along the outer peripheral surface of the first protrusion 414 a of the guide sleeve 414.
  • the downstream side passage 145b includes the large diameter portion 101b1 which is a part of the center bore 101b, and the guide sleeve 414 whose internal space 414c constitutes the second port 502 has a large diameter in the center bore 101b. It has the 2nd projection part 414b which protrudes in diameter part 101b1. Therefore, when the switching valve 400 is switched from the first state to the second state, the outflow of the oil from the crank chamber 140 to the suction chamber 141 can be suppressed.
  • FIG. 15 is a cross-sectional view showing a switching valve 500 according to a modification
  • FIG. 15 (A) shows a state of the switching valve 500 when the control valve 300 is open
  • FIG. 6 shows the state of the switching valve 500 when the control valve 300 is closed
  • FIG. 16 is a cross-sectional view taken along the line BB of FIG. 15 (B).
  • FIGS. 15 (A), (B) and FIG. 16 the same reference numerals are used for components common to the above-described switching valve 400.
  • the fourth port 504 formed as a recess is opened on the other end wall surface 412 of the valve chamber 410, and the fourth port 504 is a large diameter portion 101b1 of the center bore 101b ( It indirectly communicates with the downstream side passage 145 b).
  • the discharge valve forming plate 151, the valve plate 103 and the suction valve forming plate 150 are substituted for the fourth port 504 on the other end wall surface 412 of the valve chamber 410.
  • At least one (here, two) fifth ports 507 that penetrate are open, and at least one fifth port 507 directly communicates with the large diameter portion 101b1 (downstream passage 145b) of the center bore 101b. doing.
  • each of the at least one fifth port 507 is an arc-shaped hole extending along the outer peripheral surface of the first protrusion 414 a of the guide sleeve 414, as with the third port 503.
  • the second end wall 412 of the valve chamber 410 is opened lower than the third port 503 in FIG. 16.
  • the opening area (total opening area) of at least one fifth port 507 is set larger than the opening area of the third port 503.
  • the fifth port 507 is configured to be opened and closed together with the third port 503 by the end face 422a of the second valve portion 422 of the main valve body 420 coming into contact with the other end wall surface 412 of the valve chamber 410. There is.
  • At least one passage portion 440 to be provided is formed by at least one groove 422c formed in the inner peripheral surface of the accommodation hole 422b.
  • the operation of the switching valve 500 according to the modification is basically the same as the operation of the switching valve 400 described above. That is, when the control valve 300 is opened, the pressure Pm of the communication passage 104d (upstream passage 145a) rises.
  • the main valve body 420 moves in the valve chamber 410 by a force due to the pressure difference (Pm-Pc), and the end surface 421 a of the first valve portion 421 is separated from the one end wall surface 411 of the valve chamber 410.
  • the 501 is opened, and the end surface 422 a of the second valve portion 422 abuts on the other end wall surface 412 of the valve chamber 410 to close the third port 503 and the fifth port 507.
  • the sub valve body 430 moves in the internal space 414 c (second port 502) of the guide sleeve 414, and the end face 432 a of the third valve portion 432 is formed in the second valve portion 422 of the main valve body 420.
  • the first internal passage 423 of the main valve body 420 is opened apart from the bottom surface of the hole 422b.
  • the refrigerant in the communication passage 104d flows from the first port 501 into the valve chamber 410, and the refrigerant flowing into the valve chamber 410 is the main
  • the gas flows into the first internal passage 423 of the valve body 420 and passes through the first internal passage 423.
  • the refrigerant having passed through the first inner passage 423 further passes through the accommodation hole 422 b, the inner space 414 c (second port 502) of the guide sleeve 414, and the second inner passage 434 of the sub valve body 430.
  • the switching valve 500 is in the first state in which the upstream passage 145a and the downstream passage 145b communicate with each other and the refrigerant in the upstream passage 145a flows to the downstream passage 145b. Then, the switching valve 500 maintains the first state while the control valve 300 is open.
  • the backflowed refrigerant does not flow into the communication passage 104d (the upstream passage 145a), and the pressure Pm of the communication passage 104d (the upstream passage 145a) reliably and promptly decreases to the pressure Ps of the suction chamber 141.
  • the fifth port 507 formed on the other end wall surface 412 of the valve chamber 410 is in communication with the large diameter portion 101b1 (downstream passage 145b) of the center bore 101b. That is, the pressure of the crank chamber 140 is led to the end surface 422 a of the second valve portion 422, and the portion of the end surface 422 a of the second valve portion 422 of the main valve body 420 corresponds to the pressure of the crank chamber 140.
  • the pressure receiving portion receives Pc (the pressure Pc of the crank chamber 140 directly acts on the second valve portion 422).
  • the fifth port 507 corresponds to the “pressure-introducing port” of the present invention.
  • the communication path 104d upstream passage 145a
  • the large diameter portion 101b1 of the center bore 101b downstream passage 145b
  • the communication is interrupted, and the second port 502 and the third port 503 form the passage portion 440 (here, the gap between the inner peripheral surface of the accommodation hole 422b and the outer peripheral surface of the first projecting portion 414a) and the valve chamber 410.
  • the fifth port 507 and the third port 503 communicate with each other through the valve chamber 410 while communicating with each other.
  • the refrigerant in the large diameter portion 101b1 (downstream passage 145b) of the center bore 101b is the small diameter space portion 414c2 (second port 502) of the guide sleeve 414,
  • the second internal passage 434 of the valve body 430, the large diameter space portion 414c1 (second port 502) of the guide sleeve 414, and the passage portion 440 (the gap) flow into the valve chamber 410, and the large diameter of the center bore 101b.
  • the refrigerant in the diameter portion 101b1 flows from the fifth port 507 into the valve chamber 410, and the refrigerant flowing into the valve chamber 410 passes through the third port 503, the communication passage 505 and the communication hole 506 and is sucked. It flows into the room 141. That is, the switching valve 500 is in the second state in which the downstream passage 145 b and the suction chamber 141 communicate with each other and the downstream passage 145 b functions as the discharge passage. Then, the switching valve 500 maintains the second state while the control valve 300 is closed.
  • variable displacement compressor according to a second embodiment of the present invention will be described.
  • the description is suitably abbreviate
  • FIG. 17 is an enlarged view (corresponding to FIG. 10) of main parts of a variable displacement compressor according to a second embodiment of the present invention.
  • a switching valve 600 is used instead of the above-described switching valve 400 (or switching valve 500).
  • the switching valve 600 includes a valve chamber 610, a main valve body 620, and a sub valve body 430.
  • the communication passage 104 d constituting the upstream passage 145 a between the control valve 300 and the switching valve 600 in the supply passage 145 corresponds to the third region S 3 in the housing hole 104 a for housing the control valve 300 and the switching valve 600. It is formed to be in direct communication.
  • FIG. 18 is a cross-sectional view of the switching valve 600, and FIG. 18 (A) shows the state of the switching valve 600 when the control valve 300 is open, and FIG. 18 (B) shows the control valve 300. The state of the switching valve 600 at the time of closing is shown.
  • FIG. 19 is a cross-sectional view of the valve chamber 610.
  • the valve chamber 610 is mainly formed by a receiving hole 104 f provided in the cylinder head 104.
  • the housing hole 104f is adjacent to the suction chamber 141 and faces the large diameter portion 101b1 of the center bore 101b formed in the cylinder block 101 with the intervening member interposed therebetween, similarly to the housing hole 104e in the first embodiment. It is provided.
  • the housing hole 104f has a cylindrical large diameter hole portion 104f1 opened at the end face of the cylinder head 104 on the cylinder block 101 side, and a smaller diameter than the large diameter hole portion 104f1 and opens at the bottom surface 104f1a of the large diameter hole portion 104f1.
  • a small diameter hole portion 104 f 2 The bottom surface 104f1a of the large diameter hole portion 104f1 and the bottom surface 104f2a of the small diameter hole portion 104f2 are parallel to each other.
  • the periphery of the opening of the large diameter hole portion 104 f 1 in the cylinder head 104 is in contact with the head gasket 153, and the opening of the large diameter hole portion 104 f 1 is closed by the discharge valve forming plate 151.
  • the bottom surface of the accommodation hole 104f that is, the bottom surface 104f2a of the small diameter hole portion 104f2 forms one end wall surface 611 of the valve chamber 610, and the large diameter hole portion 104f1 in the surface of the discharge valve forming plate 151 on the cylinder head 104 side.
  • the portion closing the opening forms the other end wall surface 612 of the valve chamber 610.
  • the inner peripheral surface of the accommodation hole 104 f (the large diameter hole portion 104 f 1 and the small diameter hole portion 104 f 2) forms a peripheral wall surface 613 of the valve chamber 610.
  • the other end wall surface 612 faces the one end wall surface 611 (the bottom surface 104f2a of the small diameter hole portion 104f2) and also faces the bottom surface 104f1a of the large diameter hole portion 104f1 parallel to the one end wall surface 611. doing.
  • a cylindrical guide sleeve (cylindrical member) 414 is fixed to a portion of the valve plate 103 located between the valve chamber 610 and the large diameter portion 101 b 1 of the center bore 101 b.
  • the guide sleeve 414 is fixed by fitting the middle portion in the length direction to the through hole 103 d formed in the valve plate 103, and the bottom surface of the large diameter hole portion 104 f 1 from the other end wall surface 612 in the valve chamber 610
  • a first projection 414a that protrudes to the 104f1a side (or to the one end wall 611 side) and a second projection 414b that protrudes into the large diameter portion 101b1 of the center bore 101b formed in the cylinder block 101. ,have.
  • An internal space 414c of the guide sleeve 414 includes a large diameter space 414c1 located on the first protrusion 414a side, and a small diameter space 414c2 located on the second protrusion 414b and smaller in diameter than the large diameter space 414c1. It is formed of
  • One end (downstream end) of the communication passage 104 d is open on the inner peripheral surface of the bottom surface 104 f 2 a of the small diameter hole portion 104 f 2 or in the vicinity thereof in the valve chamber 610.
  • the opening of the small diameter hole portion 104f2 opened in the bottom surface 104f1a of the large diameter hole portion 104f1 is the communication passage 104d (that is, the upstream side between the control valve 300 and the switching valve 600 in the supply passage 145).
  • a first port 601 communicating with the passage 145a) is configured.
  • the internal space 414c (large diameter space portion 414c1, small diameter space portion 414c2) of the guide sleeve 414 is located downstream of the large diameter portion 101b1 of the center bore 101b (ie, between the switching valve 600 and the crank chamber 140 in the supply passage 145).
  • a second port 602 communicating with the side passage 145 b) is configured.
  • a third port 603 and at least one fourth port 604 are opened in the other end wall surface 612 of the valve chamber 610.
  • the third port 603 is provided via a communication passage 605 formed by a groove formed in the valve plate 103 and the discharge valve forming plate 151, and a communication hole 606 penetrating the discharge valve forming plate 151 and the head gasket 153. It communicates with the suction chamber 141.
  • the fourth port 604 penetrates the discharge valve forming plate 151, the valve plate 103, and the suction valve forming plate 150, and the large diameter portion 101b1 of the center bore 101b (ie, the switching valve 600 and the crank chamber 140 in the supply passage 145). In communication with the downstream side passage 145 b).
  • FIG. 20 is a CC cross-sectional enlarged view of FIG.
  • the second port 602 (the inner space 414c of the guide sleeve 414) is located approximately at the center of the other end wall surface 612 of the valve chamber 610
  • the third port 603 is a second port 602.
  • an arc-shaped hole extending along the outer peripheral surface of the first protrusion 414 a of the guide sleeve 414 is formed.
  • each of the at least one (here, two) fourth ports 604 is formed as an arc-shaped hole extending along the outer peripheral surface of the first protrusion 414a of the guide sleeve 414, and The three ports 603 are opened downward in FIG.
  • the opening area (total opening area) of at least one fourth port 604 is set larger than the opening area of the third port 603.
  • the discharge valve forming plate 151 is formed with a throttle passage 607 communicating the valve chamber 610 with the suction chamber 141.
  • FIG. 21 is a cross-sectional view of the main valve body 620.
  • the main valve body 620 includes a main body 621 located in the large diameter hole portion 104 f 1 forming the valve chamber 610, and the valve chamber 610. It has a projection 622 mainly located in the small diameter hole 104 f 2 to be formed, and a first internal passage 623 formed inside.
  • the main body portion 621 is formed in a cylindrical shape having a diameter smaller than that of the large diameter hole portion 104f1 and larger than that of the small diameter hole portion 104f2.
  • the main body portion 621 is configured to move between the bottom surface 104f1a of the large diameter hole portion 104f1 and the other end wall surface 612 of the valve chamber 610 in the valve chamber 610, and one end surface thereof is the large diameter hole portion
  • the first valve portion 621a is in contact with the bottom surface 104f1a of 104f1 and the other end surface is in contact with the second end wall 612.
  • a communication groove 621c is formed in a portion in contact with the bottom surface 104f1a of the large diameter hole portion 104f1 of the first valve portion 621a.
  • the communication groove 621c functions as a narrowed portion communicating with the large diameter hole portion 104f1 and the small diameter hole portion 104f2 in the valve chamber 610 when the first valve portion 621a is in contact with the bottom surface 104f1a of the large diameter hole portion 104f1.
  • the protruding portion 622 protrudes from the one end surface (first valve portion 621a) of the main body portion 621 toward the one end wall surface 611 (bottom surface 104f2a of the small diameter hole portion 104f2) of the valve chamber 610.
  • the projecting portion 622 is formed to have a smaller diameter than the opening (that is, the first port 601) of the small diameter hole portion 104f2 and has a protruding height (protruding length) smaller than the depth of the small diameter hole portion 104f2. .
  • the tip end surface 622a of the protrusion 622 is on the bottom surface 104f2a of the small diameter hole portion 104f2. Without contact, a sufficient gap is formed between the outer surface of the projecting portion 622 and the inner surface of the small diameter hole portion 104f2.
  • an accommodation hole 621 d for accommodating the first projecting portion 414 a of the guide sleeve 414 is formed.
  • the accommodation hole 621 d is formed such that the depth thereof is greater than the height (protrusion length) of the valve chamber 610 of the first projection 414 a of the guide sleeve 414 from the other end wall surface 612.
  • a predetermined gap G1 is formed between the inner peripheral surface of the accommodation hole 621d and the outer peripheral surface of the first protrusion 414a of the guide sleeve 414.
  • the first internal passage 623 has one end open to the bottom surface of the accommodation hole 621 d and the other end open to the tip end surface 622 a of the projection 622, and (small diameter hole 104 f 2 of the valve chamber 610) and the accommodation hole 621 d It is in communication.
  • the main valve body 620 moves in the valve chamber 610 by sliding the inner peripheral surface of the accommodation hole 621 d on the outer peripheral surface of the first protrusion 414 a of the guide sleeve 414. Further, when moving the inside of the valve chamber 610, the main valve body 620 does not contact the peripheral wall surface 613 of the valve chamber 610 (the inner peripheral surface of the large diameter hole portion 104f1 and the inner peripheral surface of the small diameter hole portion 104f2). It has become.
  • the movement of one of the main valve body 620 is restricted by the first valve portion 621a of the main body portion 621 contacting the bottom surface 104f1a of the large diameter hole portion 104f1, and the second valve portion 621b of the main body portion 621 By contacting the other end wall surface 612, the movement of the other is restricted.
  • the second valve portion 621b is separated from the other end wall surface 612, and the second valve portion 612b is a valve chamber
  • the first valve portion 621a is configured to be separated from the bottom surface 104f1a of the large diameter hole portion 104f1 when contacting the other end wall surface 612 of 610.
  • the opening (that is, the first port 601) of the small diameter hole portion 104f2 is closed by the first valve portion 621a.
  • the large diameter hole portion 104f1 and the small diameter hole portion 104f2 in the valve chamber 610 communicate with each other through the communication groove 621c that functions as a throttling portion formed in the first valve portion 621a. That is, "closing the first port" in the present invention includes closing the first port in a state where there is a gap such as a narrowed portion.
  • the second valve portion 621b When the first valve portion 621a abuts on the bottom surface 104f1a of the large diameter hole portion 104f1, the second valve portion 621b is separated from the other end wall surface 612, and the third port 603 and the fourth port 604 are opened.
  • the second port 602 and the third port 603 communicate with each other through the accommodation hole 621 d, the gap G 1 and the large diameter hole portion 104 f 1 of the valve chamber 610, and the fourth port 604 and the third port 603 communicate with each other. Communication is performed via the large diameter hole portion 104f1 (see FIG. 18B).
  • the sub valve body 430 is accommodated in the internal space 414 c of the guide sleeve 414 and moves the internal space 414 c of the guide sleeve 414 in the axial direction of the guide sleeve 414. That is, the sub valve body 430 is configured to move in the second port 602.
  • the configuration and the like of the sub valve body 430 are as described above (see FIG. 9 and the like), and thus detailed description thereof will be omitted.
  • the first internal passage 623 of the main valve body 620 passes through the accommodation hole 621 d and the large diameter space portion 414 c 1 (second port 602) of the guide sleeve 414. It communicates with the second internal passage 434 of the sub valve body 430 (see FIGS. 18A and 18B).
  • the sub valve body 430 moves in the internal space 414 c (second port 602) of the guide sleeve 414, and the end face 432 a of the third valve portion 432 is separated from the bottom surface of the accommodation hole 621 d of the main valve body 620.
  • the first internal passage 623 of the main valve body 620 is opened.
  • the communication passage 104 d (the upstream passage 145 a) and the large diameter portion 101 b 1 (the downstream passage 145 b) of the center bore 101 b are the valve chamber 610, the first internal passage 623 of the main valve body 620, and the main valve body 620.
  • the refrigerant in the communication passage 104d flows into the valve chamber 610, and the refrigerant flowing into the valve chamber 610 flows in the main valve body 620. 1 flows into the internal passage 623 and passes through the first internal passage 623;
  • the refrigerant that has passed through the first inner passage 623 passes through the accommodation hole 621 d, the inner space 414 c of the guide sleeve 414 (second port 602), and the second inner passage 434 of the sub valve 430 more specifically.
  • the switching valve 600 is in the first state in which the upstream passage 145a and the downstream passage 145b communicate with each other to flow the refrigerant in the upstream passage 145a to the downstream passage 145b. Then, the switching valve 600 maintains the first state while the control valve 300 is open.
  • the second valve portion 621b of the main valve body 620 moves away from the other end wall surface 612 of the valve chamber 610 to move the third port 603 and the fourth port 604 by the force of the difference (Pc-Pm).
  • the first valve portion 621a of the main valve body 620 abuts on the bottom surface 104f1a of the large diameter hole portion 104f1 in the valve chamber 610, and the first port 601 is closed.
  • the fourth port 604 formed on the other end wall surface 612 of the valve chamber 610 communicates with the large diameter portion 101b1 (downstream side passage 145b) of the center bore 101b, and the pressure of the crank chamber 140 It is led to the 2 valve part 621b. That is, a portion of the second valve portion 621b of the main valve body 620 corresponding to the fourth port 604 becomes a pressure receiving portion for receiving the pressure Pc of the crank chamber 140 (the pressure Pc of the crank chamber 140 directly affects the second valve portion 621b). To work).
  • the fourth port 604 corresponds to the “voltage introduction port” of the present invention.
  • the large diameter space portion 414c1 (second port 602) of the guide sleeve 414, the gap G1, the valve chamber 610, the third port 603, the communication passage 605 and the communication hole 606 communicate with each other, and the fourth port 604, the valve chamber Communication is performed via the third port 603, the communication passage 605, and the communication hole 606.
  • the refrigerant in the large diameter portion 101b1 (downstream passage 145b) of the center bore 101b is the small diameter space portion 414c2 (second port 602) of the guide sleeve 414,
  • the refrigerant in the passage 145 b) flows into the valve chamber 610 through the fourth port 604, and the refrigerant flowing into the valve chamber 610 flows into the suction chamber 141 through the third port 603, the communication passage 605 and the communication hole 606.
  • the switching valve 600 is in the second state in which the downstream passage 145 b and the suction chamber 141 communicate with each other and the downstream passage 145 b functions as a discharge passage. Then, the switching valve 600 maintains the second state while the control valve 300 is closed.
  • the large diameter hole portion 104f1 and the small diameter hole portion 104f2 in the valve chamber 610 communicate with the communication groove 621c formed in the first valve portion 621a ( Since the communication is made via the throttle portion, the pressure in the valve chamber 610 (the pressure of the large diameter hole portion 104 f 1 and the pressure of the small diameter hole portion 104 f 2) is equalized.
  • the bottom surface 104f1a of the large diameter hole portion 104f1 in the valve chamber 610 corresponds to the “first wall surface of the valve chamber” in the present invention
  • the other end wall surface 612 of the valve chamber 610 is the “valve in the present invention It corresponds to the second wall of the room.
  • the same effect as the switching valves 400 and 500 in the first embodiment can be obtained.
  • the length in the moving direction of the main valve body is shortened compared to the switching valves 400 and 500 in the first embodiment, and the main valve body can be miniaturized.
  • the structure of the main valve body (in particular, the first internal passage) is simplified.
  • FIG. 22 is a cross-sectional view showing a switching valve 700 according to a modification.
  • the switching valve 700 according to the modification includes a valve chamber 610, a main valve body 720, and a sub valve body 430.
  • the main valve body 720 is internally formed with a main body 721 located in the large diameter hole 104f1 forming the valve chamber 610, and a projection 722 mainly located in the small diameter hole 104f2 forming the valve chamber 610, And the first internal passage 723.
  • a second valve portion 721 b constituting a first valve portion 721 a in which one end surface of the main body portion 721 approaches or separates from the bottom surface 104 f 1 a of the large diameter hole portion 104 f 1 and the other end surface separates and contacts the other end wall surface 612 are configured. Further, one end of the first internal passage 723 opens at the bottom surface of the accommodation hole 721 d formed in the second valve portion 721 b and the other end opens at the tip end surface 722 a of the projecting portion 722.
  • the projecting portion 622 of the main valve body 620 has a projecting height (projecting length) smaller than the depth of the small diameter hole portion 104f2, and the first valve portion 621a communicates with the communication groove 621c (a throttle Part) is formed.
  • the projecting portion 722 of the main valve body 720 has a projecting height (projecting length) larger than the depth of the small diameter hole portion 104f2, and the first valve portion 721a No communicating groove (squeezed portion) is formed.
  • the first valve portion 621a of the main body portion 621 abuts on the bottom surface 104f1a of the large diameter hole portion 104f1 in the main valve body 620, thereby restricting the one movement.
  • the first valve portion 621a abuts on the bottom surface 104f1a of the large diameter hole portion 104f1
  • the first port 601 is closed
  • the large diameter hole portion 104f1 in the valve chamber 610 The small diameter hole portion 104f2 communicates with the small diameter hole portion 104f2 via a communication groove 621c (a throttling portion) formed in the first valve portion 621a.
  • the tip end surface 722a of the projecting portion 722 abuts on the one end wall surface 611 (bottom surface 104f2a of the small diameter hole portion 104f2) of the valve chamber 610. Controls the movement of the one side. Then, when the front end surface 722a of the projecting portion 722 abuts on the one end wall surface 611 (bottom surface 104f2a of the small diameter hole portion 104f2) of the valve chamber 610, the first valve portion 721a of the main body portion 721 has a minute gap G2.
  • the minute gap G2 functions as a throttling portion replacing the communication groove 621c.
  • the above-described switching valve 600 and the switching valve 700 according to the modification are basically in common. Also in the switching valve 700 according to the modification, the same effect as that of the switching valve 600 described above can be obtained.
  • the present invention is not limited to the above-mentioned embodiment and modification, and the further modification and change are possible based on the technical idea of the present invention It is.
  • variable displacement compressor 101: cylinder block, 101a: cylinder bore, 101b: center bore, 103: valve plate (intervening member), 140: crank chamber (control pressure chamber), 141: suction chamber, 142: discharge chamber, 145 ... supply passage, 145a ... upstream passage, 145b ... downstream passage, 146 ... first discharge passage, 147 ... second discharge passage, 148 ... throttle passage, 300 ... control valve, 400, 500 ... switching valve, 410 ...
  • Valve chamber 411 One end wall surface (first wall surface) of the valve chamber 412: Other end wall surface (second wall surface) of the valve chamber 413: Peripheral wall surface of the valve chamber 414: Guide sleeve (cylindrical member) 414c Internal space of guide sleeve 420 Main valve body 421 First valve portion of main valve body 422 Second valve portion of main valve body 423 Internal passage of main valve body (First internal passage ), 430

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  • General Engineering & Computer Science (AREA)
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Abstract

La présente invention concerne un compresseur à capacité variable dans lequel : lorsque la pression d'un passage qui est en amont d'une vanne de commutation 400 qui est disposée en aval d'une vanne de commande qui ajuste l'ouverture d'un passage de distribution qui distribue un fluide frigorigène qui est à l'intérieur d'une chambre de décharge à une chambre de pression de commande s'élève au-dessus de la pression de la chambre de pression de commande, un corps de vanne principal 420 ouvre un premier orifice 501, un corps de vanne auxiliaire 430 ouvre un premier passage interne 423 du corps de vanne principal 420, et un fluide frigorigène dans le passage côté amont s'écoule dans une chambre de vanne 410 et ensuite, par l'intermédiaire du premier passage interne 423 et d'un deuxième orifice 502, s'écoule dans un passage côté aval ; et lorsque la pression du passage côté amont diminue au-dessous de la pression de la chambre de pression de commande, le corps de vanne auxiliaire 430 fonctionne à l'avance du corps de vanne principal 420 et ferme le premier passage interne 423, le corps de vanne principal 420 ouvre un troisième orifice 503, et un fluide frigorigène dans le passage côté aval s'écoule dans la chambre de vanne 410 et ensuite, par l'intermédiaire du troisième orifice 503, s'écoule dans une chambre d'admission. Le deuxième orifice 502 est formé par un espace interne 414c d'un manchon de guidage 414, et le corps de vanne auxiliaire 430 est logé de façon mobile dans le deuxième orifice 502.
PCT/JP2019/000724 2018-01-15 2019-01-11 Compresseur à capacité variable WO2019139132A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020153287A (ja) * 2019-03-20 2020-09-24 サンデン・オートモーティブコンポーネント株式会社 可変容量圧縮機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04134188A (ja) * 1990-09-27 1992-05-08 Toyota Autom Loom Works Ltd 容量可変揺動斜板型圧縮機
JP2017218926A (ja) * 2016-06-03 2017-12-14 サンデン・オートモーティブコンポーネント株式会社 可変容量圧縮機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04134188A (ja) * 1990-09-27 1992-05-08 Toyota Autom Loom Works Ltd 容量可変揺動斜板型圧縮機
JP2017218926A (ja) * 2016-06-03 2017-12-14 サンデン・オートモーティブコンポーネント株式会社 可変容量圧縮機

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020153287A (ja) * 2019-03-20 2020-09-24 サンデン・オートモーティブコンポーネント株式会社 可変容量圧縮機
WO2020189604A1 (fr) * 2019-03-20 2020-09-24 サンデン・オートモーティブコンポーネント株式会社 Compresseur à capacité variable
CN113574275A (zh) * 2019-03-20 2021-10-29 三电汽车部件株式会社 可变容量压缩机
CN113574275B (zh) * 2019-03-20 2022-10-28 三电汽车部件株式会社 可变容量压缩机
JP7185568B2 (ja) 2019-03-20 2022-12-07 サンデン株式会社 可変容量圧縮機
US11841010B2 (en) 2019-03-20 2023-12-12 Sanden Corporation Variable displacement compressor

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