WO2004059166A1 - Control valve for variable capacity compressor - Google Patents

Control valve for variable capacity compressor Download PDF

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Publication number
WO2004059166A1
WO2004059166A1 PCT/JP2003/014432 JP0314432W WO2004059166A1 WO 2004059166 A1 WO2004059166 A1 WO 2004059166A1 JP 0314432 W JP0314432 W JP 0314432W WO 2004059166 A1 WO2004059166 A1 WO 2004059166A1
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WO
WIPO (PCT)
Prior art keywords
pressure
valve
housing
chamber
opening
Prior art date
Application number
PCT/JP2003/014432
Other languages
French (fr)
Japanese (ja)
Inventor
Yukio Kazahaya
Akiyoshi Sekine
Original Assignee
Zexel Valeo Climate Control Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zexel Valeo Climate Control Corporation filed Critical Zexel Valeo Climate Control Corporation
Publication of WO2004059166A1 publication Critical patent/WO2004059166A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08Multi-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
    • F04B27/14Control
    • F04B27/16Control of pumps with stationary cylinders
    • F04B27/18Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804Controlled by crankcase pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08Multi-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
    • F04B27/14Control
    • F04B27/16Control of pumps with stationary cylinders
    • F04B27/18Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804Controlled by crankcase pressure
    • F04B2027/184Valve controlling parameter
    • F04B2027/1854External parameters

Definitions

  • the present invention is used for a variable displacement compressor used in a vehicle air conditioner or the like, and is disposed on an air supply passage that clearly communicates a discharge pressure region with a crank chamber, and an opening degree of the air supply passage
  • the present invention relates to a control valve for a variable displacement compressor, which is capable of controlling pressure in a crank chamber by adjusting pressure.
  • a valve body that opens and closes the valve hole is arranged in the center, and connected to one side of the valve body via a pressure-sensitive rod, and when the pressure in the suction pressure region rises, the valve hole is opened.
  • a pressure-sensitive part that urges the valve body in the decreasing direction is provided, and is connected to the other side of the valve body via a solenoid rod, and the opening of the valve hole is reduced when the coil is excited. It is known to dispose a solenoid part for urging the valve body in the direction (Japanese Patent Application Laid-Open No. 9-1268973 [0505 to 0577 column, FIG. 1] and Japanese Patent Application Laid-Open No. 2000-184420 [columns [004] to 046, FIG. 1]). Further, in these documents, a configuration having a forced opening means for forcibly opening a valve hole by degaussing a coil is disclosed.
  • the configuration of these control valves is such that the pressure sensing portion and the solenoid portion are disposed on opposite sides of the valve body, and these components are arranged side by side in the axial direction.
  • the length of the control valve was reduced, and it was difficult to reduce the size of the compressor using the control valve.
  • the configuration be one that can avoid the inconveniences involved.
  • the main object of the present invention is to reduce the axial size of a control valve used in a variable displacement compressor, thereby reducing the size of the control valve and, consequently, the size of the compressor. . It is also an object to eliminate the inconvenience caused by such miniaturization. Disclosure of the invention
  • a control valve for a variable displacement compressor is provided on an air supply passage communicating a discharge pressure region with a crank chamber, and adjusts an opening degree of the air supply passage.
  • a valve hole communicating between a discharge pressure introduction port communicating with the discharge pressure region and a pressure supply port communicating with the crank chamber; and opening the valve hole.
  • a pressure-sensitive part for urging the valve body for urging the valve body; a solenoid part for reducing the urging force for increasing the opening of the valve hole by exciting a coil; and a valve for decreasing the opening degree of the valve hole.
  • Valve closing direction biasing means for biasing the body;
  • control valve described above may be provided with a forced opening means for forcibly opening the valve hole by degaussing the coil.
  • the pressure-sensitive portion is disposed inside the solenoid, the axial dimension can be reduced. Also, a forced opening means is provided so that when the coil is demagnetized, the discharge pressure region and the crank chamber are communicated to force the crank chamber pressure to be equal to the discharge pressure. Can be minimized, and it is possible to support a clutchless variable displacement compressor.
  • a plunger chamber for accommodating the plunger abutting on the valve element in a reciprocating manner, It is preferable that a conical surface that is inclined in the same direction at a predetermined angle with respect to a plane perpendicular to the axis is formed on the opposing surface of the plunger and the fixed suction element.
  • the conical surface is formed on the suction surface of the fixed suction element and the surface of the plunger opposed thereto, the distance between the opposing surfaces is shortened, the amount of magnetic flux is increased, and the suction force is increased. It is possible to increase.
  • the portion where the conical surface protrudes and forms causes magnetic saturation and suppresses an excessive increase in magnetic attraction, so that the operating point should be set to a place where the air gap is small.
  • the suction power can be raised as a whole. According to the study of the inventors, it is desirable that the conical surface has an angle of about 40 degrees with respect to a plane perpendicular to the axis).
  • a first housing accommodating a control valve, a valve body, a pressure sensing portion, and a valve closing direction urging means, and a second housing which is fixedly provided with a coil and can be assembled to the first housing.
  • An adjusting plug for adjusting the set pressure of the pressure-sensitive portion is provided in the first housing; a fitting portion that can be fitted to the adjusting plug is provided in the second housing; Assemble with 2 housing
  • the relative plug between the housings may be made possible by fitting the adjust plug and the fitting part, and the set pressure of the pressure sensing part may be adjusted by changing the phase of the housing.
  • the set pressure of the pressure-sensitive portion can be adjusted by rotating the first housing and the second housing relatively. This can be easily performed.
  • FIG. 1 is a cross-sectional view of a variable displacement compressor according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a state when the control valve according to the embodiment of the present invention is energized.
  • FIG. 3 is a cross-sectional view illustrating a state when the control valve according to the embodiment of the present invention is not energized.
  • FIG. 4 is a cross-sectional view showing a state before assembling the first housing and the second housing constituting the control valve according to the embodiment of the present invention.
  • FIG. 5 is an enlarged cross-sectional view showing a configuration of a portion from a suction pressure introduction port of a control valve to a pressure sensing chamber.
  • Figure 7 shows the air gap and the suction force between the plunger fixed suction element when the conical surface whose angle (0) with respect to the plane perpendicular to the axis is 20 degrees is formed on the opposing surface of the plunger and the fixed suction element.
  • FIG. 6 is a characteristic diagram showing the relationship of FIG.
  • Figure 8 shows the air gap and suction force between the plunger fixed suction element when a conical surface with an angle ( ⁇ ) of 30 degrees with respect to a plane perpendicular to the axis is formed on the opposing surface of the plunger and the fixed suction element.
  • FIG. 4 is a characteristic diagram showing the relationship between Figure 9 shows the air gap and suction force between the plunger fixed suction element when a conical surface whose angle (0) is 40 degrees with respect to a plane perpendicular to the axis is formed on the facing surface of the plunger and the fixed suction element.
  • FIG. 4 is a characteristic diagram showing the relationship between
  • Figure 10 shows the air gap between the plunger fixed suction element and the suction force when a conical surface with an angle (0) of 50 degrees with respect to a plane perpendicular to the axis is formed on the opposing surface of the plunger and the fixed suction element.
  • FIG. 6 is a characteristic diagram showing the relationship of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 shows a clutchless variable displacement swash plate compressor as an example of a compressor.
  • This compressor has a cylinder block 1, a rear head 3 mounted on the rear side (right side in the figure) of the cylinder block 1 via a valve plate 2, and a front side of the cylinder block 1 (see FIG. (Left, middle, left).
  • the front head 4, the cylinder block 1, the valve plate 2, and the rear head 3 are axially fastened by fastening bolts 5 and constitute a housing of the entire compressor.
  • a drive shaft 7 whose one end projects from the front head 4 is accommodated in a crank chamber 6 defined by the front head 4 and the cylinder block 1.
  • a relay member 9 attached in the axial direction by a bolt 8 is fixed, and the relay member 9 is attached to an end of the front head 4 at the end of the front head 4.
  • a drive pulley 10 rotatably fitted to the outside of the vehicle and connected to an engine of the vehicle via a belt is fixed by means such as screws.
  • One end of the drive shaft 7 is hermetically sealed with the front head 4 via a sealing member 11 provided between the drive shaft 7 and the front head 4 and is provided with a radial bearing 12. Rotatably supported The other end of the drive shaft 7 is rotatably supported by a radial bearing 13 housed in the cylinder opening 1.
  • the cylinder block 1 has a through hole 14 in which the radial bearing 13 is housed, and a plurality of cylinder bores 15 arranged at equal intervals on a circumference centered on the through hole 14.
  • a single-ended screw 16 is inserted into each of the cylinder bores 15 so as to be able to slide back and forth.
  • the single-headed piston 16 has a head 16 a inserted into the cylinder pore 15, and an engaging portion 1 protruding into the crank chamber.
  • a thrust flange 17 that rotates integrally with the drive shaft 7 in the crank chamber 6 is fixed to the drive shaft 7.
  • the thrust flange 17 is rotatably supported on the front head 4 via a thrust bearing 18.
  • a swash plate 20 is connected to the thrust flange 17 via a link member 19. ing.
  • the swash plate 20 is attached so as to be tiltable around a hinge ball 21 provided on the drive shaft 7, and rotates integrally with the rotation of the thrust flange 17. I have.
  • the swash plate 20 has its peripheral edge moored to the engaging portion 16b of the single-headed piston 16 via a pair of front and rear shrouds 122.
  • Valve plate 2 has suction holes 2 corresponding to each cylinder bore 15
  • the rear head 3 has a suction chamber 26 for containing a working fluid supplied to the compression chamber, and a discharge chamber 27 for containing the working fluid discharged from the compression chamber. Is drawn.
  • the suction chamber 26 is formed at the center of the rear head 3 and communicates with a suction port 28 communicating with the outlet side of the evaporator.
  • the suction hole 24 of the plate 2 Through the suction hole 24 of the plate 2, communication with the compression chamber is possible. Further, the discharge chamber 27 is formed continuously around the suction chamber 26, communicates with a discharge port communicating with the inlet side of a condenser (not shown), and also through a discharge hole 25 of the valve plate 2. It can communicate with the compression chamber.
  • the suction hole 24 is opened and closed by a suction valve 29 provided on the front end surface of the valve plate 2
  • the discharge hole 25 is provided with a discharge valve 30 provided on the rear end surface of the valve plate 2. It is opened and closed by the
  • the discharge capacity of this compressor is determined by the stroke of piston 16, which is determined by the pressure applied to the front of piston 16, that is, the pressure in the compression chamber (the pressure in the cylinder bore) and the pressure applied to the back of the piston. That is, it is determined by the pressure difference from the pressure in the crank chamber 6 (crank chamber pressure P c). Specifically, if the pressure in the crankcase 6 is increased, the differential pressure between the compression chamber and the crankcase 6 is reduced, and the inclination angle (swing angle) of the swash plate 20 is reduced. When the stroke of the piston 16 becomes smaller, the discharge capacity becomes smaller. Conversely, when the pressure in the crank chamber 6 is made lower, the differential pressure between the compression chamber and the crank chamber 6 becomes larger. The inclination angle (oscillation angle) increases, and therefore, the stroke of piston 16 increases, and the discharge capacity increases.
  • an air supply passage 31 communicating between the discharge chamber 27 and the crank chamber 6 is formed over the cylinder head 1, the valve plate 2, and the rear head 3, and the air supply passage 31 is formed.
  • a control valve 32 is provided on the passage 31.
  • the control valve 32 is mounted in a control valve mounting hole 33 formed in the rear head 3.
  • control valve 32 a specific configuration example of the control valve 32 is shown. Hereinafter, the control valve 32 will be described in detail.
  • the control valve 32 includes a valve body 34, a plunger 35, and a pressure-sensitive element 36.
  • the first housing 37 and the second housing 39 to which the coil 38 is fixed are assembled.
  • the first housing 37 includes a valve housing 40 in which the valve element 34 is accommodated, and a base end 37 a of the first housing 37 that is air-tightly connected to the valve housing 40 to form the plunger 3. 5)
  • a base-end housing 41 that houses the pressure-sensitive element 36, and a magnetic material, which is crimped to the base-end housing 41 via an L-shaped spacer 67. At the same time, the surroundings of the housing 41
  • the valve housing 40 which is constituted by a cylindrical outer cover member 61 formed so as to cover with a gap therebetween, introduces a discharge pressure communicating with the discharge chamber 27 via the air supply passage 31.
  • a port 42 is formed on the peripheral surface near the front end, and a pressure supply port 43 communicating with the crank chamber 6 via the air supply passage 31 is formed at the front end.
  • a valve housing space 44 formed following the pressure supply port 43 and an axial extension from the valve housing space 44 are provided.
  • a valve hole 45 to which the discharge pressure introduction port 42 is connected is formed.
  • a valve element 34 is slidably inserted in the valve hole 45 in the axial direction.
  • the valve body 34 has a large-diameter valve head 34 a housed in the valve housing space 44 at the tip thereof, and the valve from the seat portion 46 formed on the periphery of the opening of the valve hole 45.
  • the opening of the valve hole 45 is controlled by adjusting the lift amount of the head 34 a.
  • the valve element 34 is always urged by a valve closing spring 47 mounted in the valve accommodating space 44 in a direction to decrease the opening degree of the valve hole 45.
  • a suction pressure introduction port 49 is formed in the valve housing 40 and communicates with the suction chamber 26 via a detection passage 48 formed in the rear head 3.
  • Pd indicates the discharge pressure
  • Ps indicates the suction pressure.
  • the base end housing 41 is made of a non-magnetic material, and is formed around the plunger. It is composed of a cylindrical non-magnetic portion 41a formed to be thinner in thickness and a magnetic portion 41b formed by welding to this and integrally formed and formed of a magnetic material in a cylindrical shape.
  • the end opposite to the side connected to the valve housing 40 is closed by an axial plug 50 screwed so as to be able to advance and retreat in the axial direction, and extends in the axial direction between the valve housing 40 and the inner space. 5 form one.
  • This internal space 51 is divided into two spaces that are axially back and forth by a fixed suction element 52 fixed in the middle, and one of the spaces connects the suction pressure introduction port 49 and A plunger chamber 51a for accommodating the plunger 35 so as to be displaceable in the axial direction is formed, and a pressure-sensitive chamber 51b for accommodating the pressure-sensitive element 36 is constituted by the other space.
  • the plunger 35 constitutes a solenoid together with the fixed suction element 52 and a coil assembly to be described later, and has a base end of a valve body 34 projecting into the plunger chamber 51 a through the valve hole 45.
  • the valve body 34 is constantly urged in a direction to increase the opening degree of the valve hole 45 by a forcible opening spring 53 mounted in contact with the fixed suction element 52.
  • the spring force of the forcible opening spring 53 is larger than the spring force of the valve closing spring 47, and the valve body 34 and the plunger 35 are in contact with each other by these springs 47, 53. Is operatively connected to maintain
  • the pressure-sensitive element 36 is made of, for example, a metal bellows, and responds according to the pressure of the fluid in the pressure-sensitive chamber 51b.
  • the pressure-sensitive element contracts when the pressure of the fluid increases, and expands when the pressure decreases.
  • a vacuum or a predetermined working body is sealed in the inside of the metal base so that a predetermined expansion / contraction characteristic can be obtained with respect to the surrounding pressure.
  • an internal spring 56 for giving the bellows a predetermined panel constant is elastically mounted in the metal bellows, and the bellows contracts more than the limit due to the contact between the end member 55 and the stopper member 57. Don't do it I'm wearing Further, a hexagonal hole 58 is formed at the base end of the adjusting plug 50 exposed from the base end configuration housing 41 so that a hexagonal wrench or the like can be attached thereto.
  • the set pressure of the pressure-sensitive element (metal bellows) 36 can be adjusted by moving forward and backward.
  • the plunger 35 has a fixed suction element.
  • a plunger rod 60 passing through a through hole 52 a formed at the center of 52 is fixed, and the tip of the plunger rod 60 is fitted into a concave portion 55 a formed in the end member 55. It is loosely fitted so that the alternation can be changed.
  • the plunger chamber 51 a to which the suction pressure introduction port 49 is connected has a flat chamfer 59 a or a concave groove provided on the side surface of the plunger 35, and a flat chamfer 59 provided on the plunger rod.
  • the pressure sensing chamber 51b communicates with the pressure sensing chamber 51b via the b, and the pressure sensing chamber 51b is filled with the fluid of the suction chamber 26 introduced from the suction pressure introduction port 49. I have.
  • the second housing 39 covers the base end 37 a of the first housing 37 in which the plunger 35 and the pressure-sensitive element 36 are housed (the base end housing 41).
  • the coil bobbin that is formed in a cylindrical shape
  • a coil 38 wound around the coil bobbin 62, a terminal 64 electrically connected to the coil 38, and a magnetic plate 65 fixed to the coil bobbin are molded with resin. It constitutes a coil assembly.
  • the resin mold 63 used here is formed so as to close one end of the coil bobbin 62, and has an input socket portion 63b in which the terminal 64 is exposed following the closing portion 63a. are doing.
  • the coil 38 is adapted to be energized from a control unit (not shown) via an input socket section 63b.
  • the coil assembly (coil bobbin 6 The inner diameter of 2) is set to be equal to or greater than the outer diameter of the base end 37a of the first housing 37 (base end housing 41), and the outer diameter of the coil assembly (coil bobbin 6 2) 6 It is set to the inner diameter of 1 or less.
  • the second housing 39 has an opening 39a at the end opposite to the input socket portion 63b, and the base end of the first housing 37 is formed through the opening 39a.
  • 37a is inserted inside the coil bobbin 62, and the outer cover member 61 is arranged outside the coil bobbin 62. That is, the coil assembly of the second housing can be inserted between the base end housing 41 of the first housing 37 and the outer cover member 61.
  • the plunger 35 and the fixed suction element 52 provided in the first housing 37 and the coil assembly provided in the second housing 39 are used.
  • a solenoid part is configured, and a pressure-sensitive part including a pressure-sensitive chamber 51 b, a pressure-sensitive element 36, a compression spring 54, an internal spring 56, and the like is disposed inside the solenoid part. It will be.
  • a magnetic path is formed around the coil 38 by the outer cover member 61, the plunger 35, the fixed suction element 52, the magnetic part 41 b of the housing 41, and the magnetic plate 65. Will be done.
  • the first housing 37 and the second housing 39 are caulked with a caulking portion 6 la integrally formed at the opening end of the outer cover member 61 to the resin mold 63 of the second housing 39. Is fixed.
  • the opening degree of the valve hole 45 that is, the lift amount of the valve body 34 is determined by the force that the valve body 34 receives from the pressure-sensitive element (bellows) 36 by the pressure of the pressure-sensitive chamber 51b and the coil 3 It is determined by the attraction force of the plunger 35 determined by the amount of electricity to the coil 8 and the balance of the spring forces of the various springs. If the amount of electricity to the coil 38 is constant, the pressure of the pressure-sensitive chamber 51b As the pressure rises, the pressure-sensitive element (bellows) 36 contracts, so the urging force for increasing the opening of the valve hole 45 decreases, and as the pressure in the pressure-sensitive chamber 51b decreases, the pressure-sensitive element (bellows) decreases.
  • the urging force for increasing the opening of the valve hole 45 increases. Also, if the pressure of the pressure sensing chamber 51b is constant, the suction force of the plunger 35 increases as the amount of power to the coil 38 increases, so the opening of the valve hole 45 is increased. The urging force decreases, and as the amount of current to the coil 38 decreases, the attraction force of the plunger 35 decreases, so that the urging force for increasing the opening degree of the valve hole 45 increases.
  • the plunger 35 loses its attraction force, so that the plunger 35 is fixed as shown in FIG.
  • the valve element 34 is urged in a direction to increase the opening of the valve hole 45 by a forcible opening spring 53 mounted elastically between the valve element 52 and the valve hole 52.
  • the spring force of the forcible opening spring 53 is set to be larger than the panel force of the valve closing spring 47, and the plunger rod 60 is loosely fitted in the concave part 55a of the end member 55.
  • the valve element 34 is not urged in the valve closing direction by the bellows 36, but is displaced in a direction to increase the opening degree of the valve hole 45 by piled on the panel force of the valve closing spring 47, and is in a fully opened state. It becomes.
  • the discharge chamber 27 and the crank chamber 6 communicate with each other, and a high pressure (discharge pressure P d) flows into the crank chamber 6 at a stretch, so that the pressure in the crank chamber 6 sharply increases and the swash plate 20 has a minimum tilt angle. Move to.
  • the piston strokes by a small amount even at the minimum tilt angle, but the compressed gas is discharged to the outside of the compressor by a check valve (not shown) provided at the compressor discharge port and having a predetermined valve opening pressure. Is blocked, and circulates inside the compressor through the inside of the control valve that is fully opened. Therefore, according to the above-described configuration, since the pressure-sensitive part is provided inside the solenoid part while having the same function as the conventional one for adjusting the opening degree of the air supply passage 31, the control valve 3 The axial dimension of (2) can be reduced, and the size of the compressor can be reduced.
  • the confronting surface of the plunger 35 and the fixed suction element 52 is provided with a cone inclined in the same direction at a predetermined angle with respect to a plane perpendicular to the axis.
  • the surfaces 70a and 70b are formed and shortening the distance between the opposing surfaces, the amount of magnetic flux is increased even with the same amount of current to increase the attractive force.
  • the periphery of the plunger 35 is cut into a tapered shape to form a conical surface 70a, and the periphery of the fixed suction element 52 is protruded toward the plunger to form a conical surface 70b.
  • the portion where the conical surface 70 b is formed causes magnetic saturation and suppresses an excessive increase in magnetic attraction, and the operating point is set to a place where the air gap is small.
  • the suction force is raised as a whole.
  • the plunger 35 and the fixed suction element 52 14 It has been found that the conical surfaces 70a, 70b formed on the opposing surfaces are preferably at about 40 degrees with respect to a plane perpendicular to the axis.
  • the solenoid section needs to obtain predetermined control characteristics based on required specifications (ie, characteristics for controlling a predetermined suction pressure P s for a predetermined current), so that the conical surface with respect to a plane perpendicular to the axis is required. Even if the angle (0) of 0a, 70b is changed, the relative difference of the attraction generated by each current must be the same.
  • the above findings indicate that when the angles ( ⁇ ) of the conical surfaces 70a and 70b with respect to a plane perpendicular to the axis are 0 °, as shown in FIG. Since a predetermined control characteristic (difference between the maximum suction force MaxF and the minimum suction force MinF) is obtained at g1, the operating point that maintains this control characteristic is changed when the angle (0) is changed. It is based on the result of verifying whether or not it can be found.
  • a predetermined control characteristic difference between the maximum suction force MaxF and the minimum suction force MinF
  • the second housing 39 covers the adjust plug 50 for adjusting the set pressure of the pressure-sensitive element (bellows) 36.
  • the second housing 39 is provided with a projection 66 that fits into the hexagon hole 58 of the adjustment plug 50, the first housing 37 is attached to the second housing 39. After that, by rotating these housings 37, 39 relative to each other, it becomes possible to displace the adjust plug 50 in the axial direction. Therefore, even when the adjust plug 50 is covered with the second housing 39, the set pressure of the pressure-sensitive element (bellows) 36 can be adjusted, and when a predetermined control characteristic value is obtained.
  • the two housings 37, 39 are fixed so as not to be relatively displaced in the axial direction and the circumferential direction. Therefore, the first housing PC Listening Island " 432
  • the conical surfaces 70 a and 70 Ob formed on the opposing surfaces of the plunger 35 and the fixed suction element 52 are pressed in such a manner that the peripheral edge of the plunger 35 is tapered.
  • the fixed suction element 52 is formed by projecting the peripheral edge of the fixed suction element 52 toward the plunger side. 52 may be formed by cutting the peripheral edge into a tapered shape.
  • the hexagonal hole 58 is provided in the adjust plug 50 of the first housing 37, and the protrusion 66 is formed in the second housing 39 to fit the hexagonal hole 58.
  • the positional relationship between the hexagonal hole 58 and the projection 66 fitted thereto may be reversed, a hexagonal hole may be provided in the second housing, and a projection fitted to this may be provided in the first housing.
  • the pressure sensing portion is provided inside the solenoid portion, the axial dimension of the control valve can be shortened, and the compressor can be further reduced. The size can be reduced.
  • a forced opening means is provided to forcibly open the valve hole when the coil is demagnetized.
  • the crank chamber pressure can be quickly set to the discharge pressure, and the clutch This makes it possible to provide a control valve suitable for a variable displacement compressor.
  • the disadvantage of arranging the pressure-sensitive part inside the solenoid part is that the conical surface is provided on the opposing surface of the plunger and the fixed suction element.
  • the valve direction urging means is housed in the first housing, and the coil is fixed to the second housing which can be assembled to the first housing, and the coil is fixed to the first housing.
  • a fitting portion capable of fitting with the adjust plug is provided in the second housing, and the first housing and the second housing are assembled.
  • the problem can be solved by fitting the adjust plug and the fitting portion to enable relative rotation between the housings. That is, even if the magnetic path width cannot be sufficiently secured due to the arrangement of the pressure-sensitive part inside the solenoid, the supply current to the coil can be increased by providing a conical surface on the opposing surface of the plunger and the fixed attractor. The suction force can be increased without increasing the pressure, and the first housing having the pressure sensing portion and the second housing having the coil are relatively rotated to set the pressure sensing portion. By adjusting the pressure, it is possible to easily adjust the set pressure of the pressure-sensitive part even when the pressure-sensitive part is covered with the solenoid.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

A control valve for a variable capacity compressor has a valve hole (45) that penetrates between a discharge pressure-introducing port (42) penetrating to a discharge chamber (27) and a pressure-supplying port (43) penetrating to a crank chamber (6); a valve body (34) for regulating the opening of the valve hole (45); a pressure-sensing chamber (51b) that penetrates to a suction chamber (26); a pressure-sensing portion that acts in accordance with the pressure of a fluid introduced in the pressure-sensing chamber (51b) and, when the fluid pressure is reduced, urges the valve body (34) in a direction to increase the opening of the valve hole (45); a solenoid portion that reduces, when a solenoid (38) is excited , the urging force that increases the opening of the valve body (45); and a valve-closing spring (47) that urges the valve body (34) in a direction to reduce the opening of the valve body (34). The pressure-sensing portion is provided inside the solenoid portion. Conical faces that incline at a predetermined angle with respect to a flat face perpendicular to the axis of the valve may be formed on opposite faces of a plunger (35) and a fixed attraction element (52). The axial dimension of the control valve used for a variable capacity compressor is reduced, so that the control valve and furthermore the compressor is downsized. Further, disadvantages caused by such downsizing can be eliminated.

Description

可変容量型圧縮機用制御弁 技術分野  Technical field of control valve for variable displacement compressor
この発明は、 車両用空調装置などに用いられる可変容量型圧縮機に利用さ れ、 吐出圧領域とクランク室とを明連通する給気通路上に配されて、 該給気通 路の開度を調節してクランク室の圧力細を制御し得るようにしている可変容量 型圧縮機用制御弁に関する。 背景技術  The present invention is used for a variable displacement compressor used in a vehicle air conditioner or the like, and is disposed on an air supply passage that clearly communicates a discharge pressure region with a crank chamber, and an opening degree of the air supply passage The present invention relates to a control valve for a variable displacement compressor, which is capable of controlling pressure in a crank chamber by adjusting pressure. Background art
この種の制御弁として、 弁孔を開閉する弁体を中央に配し、 弁体の一方側 に、 感圧ロッドを介して連結され、 吸入圧領域の圧力が上昇すると弁孔の開 度を減少する方向に弁体を付勢する感圧部を配設し、 弁体の他方側に、 ソレ ノイ ドロッ ドを介して連結され、 コイルが励磁されると弁孔の開度を減少す る方向に弁体を付勢するソレノイ ド部を配設するようにしたものが公知とな つている (特開平 9一 2 6 8 9 7 3号公報 [ 0 0 5 1〜0 0 5 7欄、 図 1 ] 及び特開 2 0 0 0— 1 8 4 2 0号公報 [ 0 0 4 1〜 0 0 4 6欄、 図 1 ] 参 照) 。 また、 これらの文献にあっては、 コイルの消磁により弁孔を強制的に 開放する強制開放手段を備えた構成が示されている。  As this type of control valve, a valve body that opens and closes the valve hole is arranged in the center, and connected to one side of the valve body via a pressure-sensitive rod, and when the pressure in the suction pressure region rises, the valve hole is opened. A pressure-sensitive part that urges the valve body in the decreasing direction is provided, and is connected to the other side of the valve body via a solenoid rod, and the opening of the valve hole is reduced when the coil is excited. It is known to dispose a solenoid part for urging the valve body in the direction (Japanese Patent Application Laid-Open No. 9-1268973 [0505 to 0577 column, FIG. 1] and Japanese Patent Application Laid-Open No. 2000-184420 [columns [004] to 046, FIG. 1]). Further, in these documents, a configuration having a forced opening means for forcibly opening a valve hole by degaussing a coil is disclosed.
しかしながら、 これらの制御弁の構成は、 弁体に対して感圧部とソレノィ ド部とが反対側に配置され、 これらが軸方向に並べて配設されているので、 制御弁自体が軸方向に長くなり、 制御弁の小型化、 引いてはこの制御弁を用 いる圧縮機の小型化が図りにく くなる不都合があった。 また、 このような不 都合を解消する構成を考える場合でも、 それに伴う不都合を回避し得る構成 であることが望ましい。 そこで、 この発明においては、 可変容量型圧縮機に用いる制御弁の軸方向 の寸法の縮小化を図り、 制御弁の小型化、 引いては圧縮機の小型化を図るこ とを主たる課題としている。 また、 このような小型化に伴って生じる不都合 を解消することをも課題としている。 発明の開示 However, the configuration of these control valves is such that the pressure sensing portion and the solenoid portion are disposed on opposite sides of the valve body, and these components are arranged side by side in the axial direction. However, the length of the control valve was reduced, and it was difficult to reduce the size of the compressor using the control valve. In addition, even when considering a configuration that solves such inconveniences, it is desirable that the configuration be one that can avoid the inconveniences involved. In view of the above, the main object of the present invention is to reduce the axial size of a control valve used in a variable displacement compressor, thereby reducing the size of the control valve and, consequently, the size of the compressor. . It is also an object to eliminate the inconvenience caused by such miniaturization. Disclosure of the invention
上記課題を達成するために、 この発明にかかる可変容量型圧縮機用制御弁 は、 吐出圧領域とクランク室とを連通する給気通路上に設けられ、 前記給気 通路の開度を調節して前記クランク室の圧力を制御するものであり、 前記吐 出圧領域に通じる吐出圧力導入ポ一トと前記クランク室に通じる圧力供給ポ —トとを連通する弁孔と、 前記弁孔の開度を調節する弁体と、 吸入圧領域に 通じる感圧室と、 前記感圧室に導かれた流体の圧力に応じて応動し、 圧力が 減少すると前記弁孔の開度を増加させる方向へ前記弁体を付勢する感圧部と、 コイルの励磁により、 前記弁孔の開度を増加させる付勢力を低減するソレノ ィ ド部と、 前記弁孔の開度を減少させる方向へ前記弁体を付勢する閉弁方向 付勢手段とを備え、 前記感圧部を前記  To achieve the above object, a control valve for a variable displacement compressor according to the present invention is provided on an air supply passage communicating a discharge pressure region with a crank chamber, and adjusts an opening degree of the air supply passage. A valve hole communicating between a discharge pressure introduction port communicating with the discharge pressure region and a pressure supply port communicating with the crank chamber; and opening the valve hole. A valve body for adjusting the degree of pressure, a pressure-sensitive chamber communicating with the suction pressure area, and responding in accordance with the pressure of the fluid introduced into the pressure-sensitive chamber, and when the pressure decreases, the opening degree of the valve hole increases. A pressure-sensitive part for urging the valve body; a solenoid part for reducing the urging force for increasing the opening of the valve hole by exciting a coil; and a valve for decreasing the opening degree of the valve hole. Valve closing direction biasing means for biasing the body;
ソレノィ ド部の内部に配設するようにしたことを特徴としている。 It is characterized by being installed inside the solenoid.
ここで、 上述した制御弁には、 コイルの消磁により、 弁孔を強制的に開放 する強制開放手段を設けるようにしてもよい。  Here, the control valve described above may be provided with a forced opening means for forcibly opening the valve hole by degaussing the coil.
したがって、 ソレノイ ド部の内部に感圧部が配されているので、 軸方向の 寸法を小さくすることが可能となる。 また、 強制開放手段を設けて、 コイル が消磁したときに、 吐出圧領域とクランク室とを連通させてクランク室圧を 吐出圧に強制的に均しくするようにしたので、 圧縮機の吐出容量を最小にす ることが可能となり、 クラッチレスの可変容量型圧縮機に対応することが可 能となる。  Therefore, since the pressure-sensitive portion is disposed inside the solenoid, the axial dimension can be reduced. Also, a forced opening means is provided so that when the coil is demagnetized, the discharge pressure region and the crank chamber are communicated to force the crank chamber pressure to be equal to the discharge pressure. Can be minimized, and it is possible to support a clutchless variable displacement compressor.
ところで、 強制開放手段を設けたことから、 コイルが消磁すると、 弁体 3 PC蘭聽 14432 By the way, the valve 3 PC Lan Listen 14432
4が強制的に全開位置に移動するので、 プランジャと吸引子との間隔 (エア ギヤヅプ) が大きくなる。 このため、 プランジャを引き寄せ、 再び制御弁を 稼動状態 (O N状態) に復帰させる場合には、 大きな吸引力が必要となる。 また、 ソレノイ ド部の内部に感圧部が設けられると、 十分な磁路巾を確保し にく くなるので、 このような点からもプランジャの吸引力を大きくする必要 がある。 4 is forcibly moved to the fully open position, so the distance between the plunger and the suction element (air gap) increases. Therefore, a large suction force is required to pull the plunger back and return the control valve to the operating state (ON state) again. Also, if a pressure-sensitive part is provided inside the solenoid, it will be difficult to secure a sufficient magnetic path width. Therefore, it is necessary to increase the attraction force of the plunger from this point.
そこで、 上述の構成においては、 ソレノイ ド部に、 前記弁体に当接するプ ランジャを往復動可能に収容するプランジャ室と、 このプランジャ室と感圧 室との間に配された固定吸引子とを設け、 プランジャと固定吸引子との対向 面に、 軸に垂直な平面に対して所定の角度で同方向に傾斜する錐面を形成す ることが好ましい。  Therefore, in the above-described configuration, in the solenoid section, a plunger chamber for accommodating the plunger abutting on the valve element in a reciprocating manner, It is preferable that a conical surface that is inclined in the same direction at a predetermined angle with respect to a plane perpendicular to the axis is formed on the opposing surface of the plunger and the fixed suction element.
このような構成によれば、 固定吸引子の吸引面とこれに対向するプランジ ャの面に錐面が形成されるので、 対向面間の距離が短くなり、 磁束量を多く して吸引力を増大させることが可能となる。 なお且つ、 供給電流が増大した 場合に、 錐面を突出形成した部分が磁気飽和を起して磁気吸引力の過剰な増 加を抑えるので、 動作点をエアギャップの小さいところに設定することがで き、 吸引力を全体的に底上げできる利点もある。 尚、 発明者らの研究によれ ば、 上記錐面は、 軸に垂直な平面に対する角度が約 4 0度であることが望ま しい) 。  According to such a configuration, since the conical surface is formed on the suction surface of the fixed suction element and the surface of the plunger opposed thereto, the distance between the opposing surfaces is shortened, the amount of magnetic flux is increased, and the suction force is increased. It is possible to increase. In addition, when the supply current increases, the portion where the conical surface protrudes and forms causes magnetic saturation and suppresses an excessive increase in magnetic attraction, so that the operating point should be set to a place where the air gap is small. Another advantage is that the suction power can be raised as a whole. According to the study of the inventors, it is desirable that the conical surface has an angle of about 40 degrees with respect to a plane perpendicular to the axis).
また、 上述のように、 感圧部をソレノィ ド部の内部に配設すると、 感圧部 にアクセスしにく くなるので、 感圧部のセッ ト圧を如何に調節するかが問題 となるが、 例えば、 制御弁を、 弁体、 感圧部、 及び閉弁方向付勢手段を収容 する第 1ハウジングと、 コイルを固設し、 前記第 1ハウジングに組付け可能 な第 2ハウジングとを有して構成し、 前記第 1ハウジングに感圧部のセッ ト 圧を調節するアジャス トプラグを設け、 前記第 2ハウジングにアジャストプ ラグに嵌合可能な嵌合部を設け、 第 1ハウジングと第 2ハウジングとを組付 けた場合に、 アジヤス トプラグと嵌合部とを嵌合させてハウジング同士の相 対的な回動を可能とし、 感圧部のセッ ト圧をハウジングの位相を変えること で調節してもよい。 In addition, as described above, if the pressure-sensitive part is disposed inside the solenoid, it becomes difficult to access the pressure-sensitive part, so there is a problem in how to adjust the set pressure of the pressure-sensitive part. However, for example, a first housing accommodating a control valve, a valve body, a pressure sensing portion, and a valve closing direction urging means, and a second housing which is fixedly provided with a coil and can be assembled to the first housing. An adjusting plug for adjusting the set pressure of the pressure-sensitive portion is provided in the first housing; a fitting portion that can be fitted to the adjusting plug is provided in the second housing; Assemble with 2 housing In the case of a beam, the relative plug between the housings may be made possible by fitting the adjust plug and the fitting part, and the set pressure of the pressure sensing part may be adjusted by changing the phase of the housing.
このような構成によれば、 感圧部がソレノィ ド部で覆われても、 第 1ハウ ジングと第 2ハウジングとを相対的に回動させることで、 感圧部のセッ ト圧 の調節を容易に行うことが可能となる。 図面の簡単な説明  According to such a configuration, even if the pressure-sensitive portion is covered with the solenoid, the set pressure of the pressure-sensitive portion can be adjusted by rotating the first housing and the second housing relatively. This can be easily performed. BRIEF DESCRIPTION OF THE FIGURES
図 1は、 本願発明の実施の形態に係る可変容量型圧縮機の断面図である。 図 2は、 本発明の実施の形態に係る制御弁の通電時の状態を示す断面図で ある。  FIG. 1 is a cross-sectional view of a variable displacement compressor according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state when the control valve according to the embodiment of the present invention is energized.
図 3は、 本発明の実施の形態に係る制御弁の無通電時の状態を示す断面図 である。  FIG. 3 is a cross-sectional view illustrating a state when the control valve according to the embodiment of the present invention is not energized.
図 4は、 本発明の実施の形態に係る制御弁を構成する第 1ハウジングと第 2ハウジングとを組み付ける前の状態を示す断面図である。  FIG. 4 is a cross-sectional view showing a state before assembling the first housing and the second housing constituting the control valve according to the embodiment of the present invention.
図 5は、 制御弁の吸入圧力導入ポートから感圧室に至る部分の構成を示す 拡大断面図である。  FIG. 5 is an enlarged cross-sectional view showing a configuration of a portion from a suction pressure introduction port of a control valve to a pressure sensing chamber.
図 6は、 プランジャと固定吸引子との対向面に錐面を形成しない場合 (0 = 0度の場合) のプランジャー固定吸引子間のエアギヤヅプと吸引力との関 係を示す特性線図である。  Figure 6 is a characteristic diagram showing the relationship between the air gap between the plunger fixed suction element and the suction force when the conical surface is not formed on the opposing surface of the plunger and the fixed suction element (when 0 = 0 degrees). is there.
図 7は、 プランジャと固定吸引子との対向面に軸に垂直な平面に対する角 度 (0 ) が 2 0度となる錐面を形成した場合のプランジャー固定吸引子間の エアギヤヅプと吸引力との関係を示す特性線図である。  Figure 7 shows the air gap and the suction force between the plunger fixed suction element when the conical surface whose angle (0) with respect to the plane perpendicular to the axis is 20 degrees is formed on the opposing surface of the plunger and the fixed suction element. FIG. 6 is a characteristic diagram showing the relationship of FIG.
図 8は、 プランジャと固定吸引子との対向面に軸に垂直な平面に対する角 度 (Θ ) が 3 0度となる錐面を形成した場合のプランジャー固定吸引子間の エアギャップと吸引力との関係を示す特性線図である。 図 9は、 ブランジャと固定吸引子との対向面に軸に垂直な平面に対する角 度 (0 ) が 4 0度となる錐面を形成した場合のプランジャー固定吸引子間の エアギャップと吸引力との関係を示す特性線図である。 Figure 8 shows the air gap and suction force between the plunger fixed suction element when a conical surface with an angle (Θ) of 30 degrees with respect to a plane perpendicular to the axis is formed on the opposing surface of the plunger and the fixed suction element. FIG. 4 is a characteristic diagram showing the relationship between Figure 9 shows the air gap and suction force between the plunger fixed suction element when a conical surface whose angle (0) is 40 degrees with respect to a plane perpendicular to the axis is formed on the facing surface of the plunger and the fixed suction element. FIG. 4 is a characteristic diagram showing the relationship between
図 1 0は、 プランジャと固定吸引子との対向面に軸に垂直な平面に対する 角度 (0 ) が 5 0度となる錐面を形成した場合のプランジャー固定吸引子間 のエアギヤップと吸引力との関係を示す特性線図である。 発明を実施するための最良の形態  Figure 10 shows the air gap between the plunger fixed suction element and the suction force when a conical surface with an angle (0) of 50 degrees with respect to a plane perpendicular to the axis is formed on the opposing surface of the plunger and the fixed suction element. FIG. 6 is a characteristic diagram showing the relationship of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
以下、 この発明の実施め態様を図面に基づいて説明する。  Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図 1において、 圧縮機の一例としてクラッチレスの可変容量犁斜板式圧縮 機が示されている。 この圧縮機は、 シリンダブロック 1と、 このシリンダブ ロック 1のリア側 (図中、 右側) にバルブプレート 2を介して組み付けられ たリァへッ ド 3と、 シリンダブ口ック 1のフロント側 (図中、 左側) を閉塞 するように組み付けられたフロントへッ ド 4とを有して構成されている。 こ れらフロントへヅ ド 4、 シリンダブロック 1、 バルブプレート 2、 及び、 リ アヘッ ド 3は、 締結ボルト 5により軸方向に締結されており、 圧縮機全体の ハウジングを構成している。  FIG. 1 shows a clutchless variable displacement swash plate compressor as an example of a compressor. This compressor has a cylinder block 1, a rear head 3 mounted on the rear side (right side in the figure) of the cylinder block 1 via a valve plate 2, and a front side of the cylinder block 1 (see FIG. (Left, middle, left). The front head 4, the cylinder block 1, the valve plate 2, and the rear head 3 are axially fastened by fastening bolts 5 and constitute a housing of the entire compressor.
フロントへッ ド 4とシリンダブロック 1とによって画設されるクランク室 6には、 一端がフロントへヅ ド 4から突出する駆動シャフト 7が収容されて いる。 この駆動シャフ ト 7のフロントヘッ ド 4から突出した部分には、 ボル ト 8によって軸方向に取り付けられた中継部材 9が固定されており、 この中 継部材 9にフロントヘッ ド 4の端部に回転自在に外嵌され、 且つ、 車両のェ ンジンにベルトを介して連結される駆動プーリ 1 0がネジ止めなどの手段に よって固定されている。 また、 この駆動シャフト 7の一端側は、 フロントへ ッ ド 4との間に設けられたシール部材 1 1を介してフロントへヅ ド 4との間 が気密よく封じられると共にラジアル軸受 1 2にて回転自在に支持されてお り、 駆動シャフト 7の他端側は、 シリンダブ口ヅク 1に収容されたラジアル 軸受 1 3にて回転自在に支持されている。 A drive shaft 7 whose one end projects from the front head 4 is accommodated in a crank chamber 6 defined by the front head 4 and the cylinder block 1. At a portion of the drive shaft 7 protruding from the front head 4, a relay member 9 attached in the axial direction by a bolt 8 is fixed, and the relay member 9 is attached to an end of the front head 4 at the end of the front head 4. A drive pulley 10 rotatably fitted to the outside of the vehicle and connected to an engine of the vehicle via a belt is fixed by means such as screws. One end of the drive shaft 7 is hermetically sealed with the front head 4 via a sealing member 11 provided between the drive shaft 7 and the front head 4 and is provided with a radial bearing 12. Rotatably supported The other end of the drive shaft 7 is rotatably supported by a radial bearing 13 housed in the cylinder opening 1.
シリンダブ口ック 1には、 前記ラジアル軸受 1 3が収容される貫通孔 1 4 と、 この貫通孔 1 4を中心とする円周上に等間隔に配された複数のシリンダ ボア 1 5とが形成されており、 それそれのシリンダボア 1 5には、 片頭ビス トン 1 6が往復摺動可能に挿入されている。 この片頭ピストン 1 6は、 シリ ンダポア 1 5内に挿入される頭部 1 6 aと、 クランク室に突出する係合部 1 The cylinder block 1 has a through hole 14 in which the radial bearing 13 is housed, and a plurality of cylinder bores 15 arranged at equal intervals on a circumference centered on the through hole 14. A single-ended screw 16 is inserted into each of the cylinder bores 15 so as to be able to slide back and forth. The single-headed piston 16 has a head 16 a inserted into the cylinder pore 15, and an engaging portion 1 protruding into the crank chamber.
6 bとを軸方向に接合して中空に形成されている。 6b are joined in the axial direction to form a hollow.
前記駆動シャフ ト 7には、 クランク室 6内において、 該駆動シャフト 7と 一体に回転するスラス トフランジ 1 7が固定されている。 このスラストフラ ンジ 1 7は、 フロントヘッド 4に対してスラスト軸受 1 8を介して回転自在 に支持されており、 このスラストフランジ 1 7には、 リンク部材 1 9を介し て斜板 2 0が連結されている。 斜板 2 0は、 駆動シャフ ト 7上に設けられた ヒンジボール 2 1を中心に傾動可能に取り付けられているもので、 スラスト フランジ 1 7の回転に同期して一体に回転するようになっている。 そして、 斜板 2 0は、 その周縁部分が前後に設けられた一対のシュ一 2 2を介して片 頭ビストン 1 6の係合部 1 6 bに係留されている。  A thrust flange 17 that rotates integrally with the drive shaft 7 in the crank chamber 6 is fixed to the drive shaft 7. The thrust flange 17 is rotatably supported on the front head 4 via a thrust bearing 18. A swash plate 20 is connected to the thrust flange 17 via a link member 19. ing. The swash plate 20 is attached so as to be tiltable around a hinge ball 21 provided on the drive shaft 7, and rotates integrally with the rotation of the thrust flange 17. I have. The swash plate 20 has its peripheral edge moored to the engaging portion 16b of the single-headed piston 16 via a pair of front and rear shrouds 122.
したがって、 駆動シャフ ト 7が回転すると、 これに伴って斜板 2 0が回転 し、 この斜板 2 0の回転運動がシュ一 2 2を介して片頭ピストン 1 6の往復 直線運動に変換され、 シリンダボア内において片頭ビストン 1 6とバルブプ レート 2との間に形成される圧縮室の容積が変更されるようになっている。 バルブプレート 2には、 それぞれのシリンダボア 1 5に対応して吸入孔 2 Therefore, when the drive shaft 7 rotates, the swash plate 20 rotates with the rotation, and the rotational motion of the swash plate 20 is converted into the reciprocating linear motion of the single-headed piston 16 via the shroud 22. The volume of the compression chamber formed between the single-headed piston 16 and the valve plate 2 in the cylinder bore is changed. Valve plate 2 has suction holes 2 corresponding to each cylinder bore 15
4と吐出孔 2 5とが形成され、 また、 リアヘッ ド 3には、 圧縮室に供給する 作動流体を収容する吸入室 2 6と、 圧縮室から吐出した作動流体を収容する 吐出室 2 7とが画設されている。 吸入室 2 6は、 リアへヅド 3の中央部分に 形成されており、 蒸発器の出口側に通じる吸入口 2 8に連通すると共にバル PC聽麵 "432 4 and a discharge hole 25 are formed, and the rear head 3 has a suction chamber 26 for containing a working fluid supplied to the compression chamber, and a discharge chamber 27 for containing the working fluid discharged from the compression chamber. Is drawn. The suction chamber 26 is formed at the center of the rear head 3 and communicates with a suction port 28 communicating with the outlet side of the evaporator. PC Listen 麵 " 432
ブプレー.ト 2の吸入孔 2 4を介して圧縮室に連通可能となっている。 また、 吐出室 2 7は、 吸入室 2 6の周囲に連続的に形成されており、 図示しない凝 縮器の入口側に通じる吐出口に連通すると共にバルブプレート 2の吐出孔 2 5を介して圧縮室に連通可能となっている。 ここで、 吸入孔 2 4は、 バルブ プレート 2のフロント側端面に設けられた吸入弁 2 9によって開閉され、 吐 出孔 2 5は、 バルブプレート 2のリア側端面に設けられた吐出弁 3 0によつ て開閉されるようになっている。 Through the suction hole 24 of the plate 2, communication with the compression chamber is possible. Further, the discharge chamber 27 is formed continuously around the suction chamber 26, communicates with a discharge port communicating with the inlet side of a condenser (not shown), and also through a discharge hole 25 of the valve plate 2. It can communicate with the compression chamber. Here, the suction hole 24 is opened and closed by a suction valve 29 provided on the front end surface of the valve plate 2, and the discharge hole 25 is provided with a discharge valve 30 provided on the rear end surface of the valve plate 2. It is opened and closed by the
この圧縮機の吐出容量は、 ピストン 1 6のストロークによって決定され、 ' このストロークは、 ピストン 1 6の前面にかかる圧力、 即ち圧縮室の圧力 (シリンダポア内の圧力) と、 ピストンの背面にかかる圧力、 即ちクランク 室 6内の圧力 (クランク室圧 P c ) との差圧によって決定される。 具体的に は、 クランク室 6内の圧力を高くすれば、 圧縮室とクランク室 6との差圧が 小さくなるので、 斜板 2 0の傾斜角度 (揺動角度) が小さくなり、 このため、 ピストン 1 6のストロークが小さくなつて吐出容量が小さくなり、 逆に、 ク ランク室 6の圧力を低くすれば、 圧縮室とクランク室 6との差圧が大きくな るので、 斜板 2 0の傾斜角度 (揺動角度) が大きくなり、 このため、 ピスト ン 1 6のストロ一クが大きくなつて吐出容量が大きくなる。  The discharge capacity of this compressor is determined by the stroke of piston 16, which is determined by the pressure applied to the front of piston 16, that is, the pressure in the compression chamber (the pressure in the cylinder bore) and the pressure applied to the back of the piston. That is, it is determined by the pressure difference from the pressure in the crank chamber 6 (crank chamber pressure P c). Specifically, if the pressure in the crankcase 6 is increased, the differential pressure between the compression chamber and the crankcase 6 is reduced, and the inclination angle (swing angle) of the swash plate 20 is reduced. When the stroke of the piston 16 becomes smaller, the discharge capacity becomes smaller. Conversely, when the pressure in the crank chamber 6 is made lower, the differential pressure between the compression chamber and the crank chamber 6 becomes larger. The inclination angle (oscillation angle) increases, and therefore, the stroke of piston 16 increases, and the discharge capacity increases.
そして、 この例においては、 シリンダへヅ ド 1、 バルブプレート 2、 及び リアへッ ド 3に亘つて吐出室 2 7とクランク室 6とを連通する給気通路 3 1 が形成され、 この給気通路 3 1上に制御弁 3 2が設けられている。 この制御 弁 3 2は、 リアへッド 3に形成された制御弁装着孔 3 3に装着されているも ので、 給気通路 3 1の開度を調節することで、 クランク室 6の圧力 (クラン ク室圧 P c ) を制御している。  In this example, an air supply passage 31 communicating between the discharge chamber 27 and the crank chamber 6 is formed over the cylinder head 1, the valve plate 2, and the rear head 3, and the air supply passage 31 is formed. A control valve 32 is provided on the passage 31. The control valve 32 is mounted in a control valve mounting hole 33 formed in the rear head 3. By adjusting the opening degree of the air supply passage 31, the pressure in the crank chamber 6 ( It controls the crank chamber pressure P c).
図 2〜図 4において、 制御弁 3 2の具体的構成例が示されており、 以下、 この制御弁 3 2について'詳述する。  2 to 4, a specific configuration example of the control valve 32 is shown. Hereinafter, the control valve 32 will be described in detail.
制御弁 3 2は、 弁体 3 4、 プランジャ 3 5、 感圧素子 3 6が収容された第 1ハウジング 3 7と、 コイル 3 8が固設された第 2ハウジング 3 9とを組み 付けて構成されている。 The control valve 32 includes a valve body 34, a plunger 35, and a pressure-sensitive element 36. The first housing 37 and the second housing 39 to which the coil 38 is fixed are assembled.
第 1ハウジング 3 7は、 弁体 3 4が収容されたバルブハウジング 4 0と、 このバルブハウジング 4 0に気密に結合されて第 1ハウジング 3 7の基端部 3 7 aを構成すると共にプランジャ 3 5ゃ感圧素子 3 6を収容する基端部構 成ハウジング 4 1と、 磁性材料によって形成され、 基端部構成ハウジング 4 1に L字状のスぺ一サ 6 7を介して圧着されると共に、 基端部構成ハウジン グ 4 1の周囲を所定の  The first housing 37 includes a valve housing 40 in which the valve element 34 is accommodated, and a base end 37 a of the first housing 37 that is air-tightly connected to the valve housing 40 to form the plunger 3. 5) A base-end housing 41 that houses the pressure-sensitive element 36, and a magnetic material, which is crimped to the base-end housing 41 via an L-shaped spacer 67. At the same time, the surroundings of the housing 41
隙間を隔てて覆うように形成された筒状の外覆部材 6 1とから構成されている バルブハウジング 4 0には、 前記吐出室 2 7に給気通路 3 1を介して連通 する吐出圧力導入ポート 4 2が先端近傍の周面に形成され、 クランク室 6に 給気通路 3 1を介して連通する圧力供給ポ一ト 4 3が先端に形成されている。 また、 吐出圧力導入ポート 4 2と圧力供給ポート 4 3との間には、 圧力供給 ポート 4 3に続いて形成された弁収容空間 4 4と、 この弁収容空間 4 4から 軸方向に延設されて、 吐出圧力導入ポート 4 2が接続される弁孔 4 5が形成 されている。 そして、 この弁孔 4 5には、 弁体 3 4が軸方向に摺動可能に揷 入されている。 弁体 3 4は、 その先端に弁収容空間 4 4に収容された大径の 弁頭部 3 4 aを有し、 弁孔 4 5の開口周縁部に形成されたシート部 4 6から の弁頭部 3 4 aのリフ ト量を調節して弁孔 4 5の開度を制御するようにして いる。 また、 この弁体 3 4は、 弁収容空間 4 4に弹装された閉弁ばね 4 7に より、 弁孔 4 5の開度を減少させる方向へ弁体 3 4を常時付勢するようにし ている。 さらに、 バルブハウジング 4 0には、 リアヘッド 3に形成された検 圧通路 4 8を介して吸入室 2 6と連通する吸入圧力導入ポート 4 9が形成さ れている。 尚、 図中、 P dとあるのは吐出圧力、 P sとあるのは吸入圧力を それぞれ示す。 The valve housing 40, which is constituted by a cylindrical outer cover member 61 formed so as to cover with a gap therebetween, introduces a discharge pressure communicating with the discharge chamber 27 via the air supply passage 31. A port 42 is formed on the peripheral surface near the front end, and a pressure supply port 43 communicating with the crank chamber 6 via the air supply passage 31 is formed at the front end. Further, between the discharge pressure introduction port 42 and the pressure supply port 43, a valve housing space 44 formed following the pressure supply port 43 and an axial extension from the valve housing space 44 are provided. Thus, a valve hole 45 to which the discharge pressure introduction port 42 is connected is formed. A valve element 34 is slidably inserted in the valve hole 45 in the axial direction. The valve body 34 has a large-diameter valve head 34 a housed in the valve housing space 44 at the tip thereof, and the valve from the seat portion 46 formed on the periphery of the opening of the valve hole 45. The opening of the valve hole 45 is controlled by adjusting the lift amount of the head 34 a. Further, the valve element 34 is always urged by a valve closing spring 47 mounted in the valve accommodating space 44 in a direction to decrease the opening degree of the valve hole 45. ing. Further, a suction pressure introduction port 49 is formed in the valve housing 40 and communicates with the suction chamber 26 via a detection passage 48 formed in the rear head 3. In the figure, Pd indicates the discharge pressure, and Ps indicates the suction pressure.
基端部構成ハウジング 4 1は、 非磁性材料で構成されてプランジャの周囲 に肉薄に形成された筒状の非磁性部 4 1 aと、 これに溶接されて一体に形成 されると共に磁性材料で筒状に形成された磁性部 4 1 bとによって構成され ているもので、 バルブハウジング 4 0に結合する側と反対側の端部が軸方向 に進退可能に螺合されたアジヤストプラグ 5 0によって閉塞され、 バルブハ ウジング 4 0との間に軸方向に延びる.内部空間 5 1を形成している。 この内 部空間 5 1は、 中程に固定された固定吸引子 5 2によって軸方向に前後する 2つの空間に分けられており、 一方の空間によって、 吸入圧力導入ポート 4 9が接続されると共に、 プランジャ 3 5を軸方向に変位可能に収容するブラ ンジャ室 5 1 aが構成され、 他方の空間によって、 感圧素子 3 6を収容する 感圧室 5 1 bが構成されている。 The base end housing 41 is made of a non-magnetic material, and is formed around the plunger. It is composed of a cylindrical non-magnetic portion 41a formed to be thinner in thickness and a magnetic portion 41b formed by welding to this and integrally formed and formed of a magnetic material in a cylindrical shape. The end opposite to the side connected to the valve housing 40 is closed by an axial plug 50 screwed so as to be able to advance and retreat in the axial direction, and extends in the axial direction between the valve housing 40 and the inner space. 5 form one. This internal space 51 is divided into two spaces that are axially back and forth by a fixed suction element 52 fixed in the middle, and one of the spaces connects the suction pressure introduction port 49 and A plunger chamber 51a for accommodating the plunger 35 so as to be displaceable in the axial direction is formed, and a pressure-sensitive chamber 51b for accommodating the pressure-sensitive element 36 is constituted by the other space.
プランジャ 3 5は、 固定吸引子 5 2や後述するコイルアセンブリと共にソ レノィ ド部を構成しているもので、 弁孔 4 5を介してプランジャ室 5 1 aに 突出する弁体 3 4の基端と当接し、 固定吸引子 5 2との間に弾装された強制 開放ばね 5 3により、 弁孔 4 5の開度を増加させる方向へ弁体 3 4を常時付 勢するようにしている。 尚、 強制開放ばね 5 3のばね力は、 閉弁ばね 4 7の ばね力よりも大きくなつており、 弁体 3 4とプランジャ 3 5とは、 これらば ね 4 7, 5 3によって当接状態を保つように作動連結されている。  The plunger 35 constitutes a solenoid together with the fixed suction element 52 and a coil assembly to be described later, and has a base end of a valve body 34 projecting into the plunger chamber 51 a through the valve hole 45. The valve body 34 is constantly urged in a direction to increase the opening degree of the valve hole 45 by a forcible opening spring 53 mounted in contact with the fixed suction element 52. The spring force of the forcible opening spring 53 is larger than the spring force of the valve closing spring 47, and the valve body 34 and the plunger 35 are in contact with each other by these springs 47, 53. Is operatively connected to maintain
感圧素子 3 6は、 例えば、 金属べローズによって構成されているもので、 感圧室 5 1 bの流体の圧力に応じて応動し、 この流体の圧力が増加すると収 縮し、 減少すると伸長する特性を有しており、 一端がアジャストプラグ 5 0 に固定され、 他端が固定吸引子 5 2に対して圧縮ばね 5 4を介して軸方向に 変位可能に配されたエンド部材 5 5に固定されている。 ここで、 金属べ口一 ズの内部は、 真空又は所定の作動体が封入され、 周囲の圧力に対して所定の 伸縮特性が得られるようになつている。 また、 金属べローズ内には、 該ベロ ーズに所定のパネ定数を与える内部ばね 5 6が弾装され、 エンド部材 5 5と ストヅパ部材 5 7との当接によりべローズが限界以上に収縮しないようにな つている。 さらに、 基端部構成ハウジング 4 1から表出したアジャストブラ グ 5 0の基端には、 六角レンチ等を揷着可能とする六角孔 5 8が形成され、 このアジヤス卜プラグ 5 0を軸方向に進退させて感圧素子 (金属べローズ) 3 6のセッ ト圧を調節可能としている。 The pressure-sensitive element 36 is made of, for example, a metal bellows, and responds according to the pressure of the fluid in the pressure-sensitive chamber 51b. The pressure-sensitive element contracts when the pressure of the fluid increases, and expands when the pressure decreases. An end member 55 fixed at one end to the adjustment plug 50 and having the other end axially displaceable with respect to the fixed suction element 52 via a compression spring 54. Fixed. Here, a vacuum or a predetermined working body is sealed in the inside of the metal base so that a predetermined expansion / contraction characteristic can be obtained with respect to the surrounding pressure. Further, an internal spring 56 for giving the bellows a predetermined panel constant is elastically mounted in the metal bellows, and the bellows contracts more than the limit due to the contact between the end member 55 and the stopper member 57. Don't do it I'm wearing Further, a hexagonal hole 58 is formed at the base end of the adjusting plug 50 exposed from the base end configuration housing 41 so that a hexagonal wrench or the like can be attached thereto. The set pressure of the pressure-sensitive element (metal bellows) 36 can be adjusted by moving forward and backward.
そして、 前記プランジャ 3 5には、 図 5にも示されるように、 固定吸引子 As shown in FIG. 5, the plunger 35 has a fixed suction element.
5 2の中央に形成された通孔 5 2 aを揷通するプランジャロッド 6 0が固定 され、 このプランジャロッ ド 6 0の先端を、 エンド部材 5 5に形成された凹 部 5 5 aに嵌合代を変更し得るように遊嵌させている。 また、 前記吸入圧力 導入ポート 4 9が接続されたプランジャ室 5 1 aは、 プランジャ 3 5の側面 に設けられた平面取り 5 9 a又は凹溝、 及びプランジャロッ ドに設けられた 平面取り 5 9 bを介して感圧室 5 1 bに連通しており、 感圧室 5 1 bには、 吸入圧力導入ポ一ト 4 9から導入された吸入室 2 6の流体が満たされるよう になっている。 A plunger rod 60 passing through a through hole 52 a formed at the center of 52 is fixed, and the tip of the plunger rod 60 is fitted into a concave portion 55 a formed in the end member 55. It is loosely fitted so that the alternation can be changed. Also, the plunger chamber 51 a to which the suction pressure introduction port 49 is connected has a flat chamfer 59 a or a concave groove provided on the side surface of the plunger 35, and a flat chamfer 59 provided on the plunger rod. The pressure sensing chamber 51b communicates with the pressure sensing chamber 51b via the b, and the pressure sensing chamber 51b is filled with the fluid of the suction chamber 26 introduced from the suction pressure introduction port 49. I have.
これに対して、 第 2ハウジング 3 9は、 プランジャ 3 5ゃ感圧素子 3 6が 収容された第 1ハウジング 3 7の基端部 3 7 a (基端部構成ハウジング 4 1 ) を覆うように形成されているもので、 円筒状に形成されたコイルボビン On the other hand, the second housing 39 covers the base end 37 a of the first housing 37 in which the plunger 35 and the pressure-sensitive element 36 are housed (the base end housing 41). The coil bobbin that is formed in a cylindrical shape
6 2と、 このコイルボビン 6 2に卷設されたコイル 3 8と、 このコイル 3 8 に電気的に接続された端子 6 4と、 コイルボビンに固定された磁性板 6 5と を樹脂でモールドしてコイルアセンブリを構成している。 ここで用いられる 樹脂モールド 6 3は、 コイルボビン 6 2の一端側を閉塞するように形成され、 この閉塞部 6 3 aに続いて端子 6 4を表出させた入力ソケッ ト部 6 3 bを有 している。 前記コイル 3 8は、 図示しないコントロールュニヅ 卜から入力ソ ケッ ト部 6 3 bを介して通電されるようになっている。 6, a coil 38 wound around the coil bobbin 62, a terminal 64 electrically connected to the coil 38, and a magnetic plate 65 fixed to the coil bobbin are molded with resin. It constitutes a coil assembly. The resin mold 63 used here is formed so as to close one end of the coil bobbin 62, and has an input socket portion 63b in which the terminal 64 is exposed following the closing portion 63a. are doing. The coil 38 is adapted to be energized from a control unit (not shown) via an input socket section 63b.
尚、 樹脂モールド 6 3の閉塞部 6 3 aには、 第 1ハウジング 3 7と第 2ハ ウジング 3 9とを組付けた際に、 アジャス トプラグ 5 0の六角孔 5 8に嵌合 する突起 6 6が形成されている。 また、 コイルアセンブリ (コイルボビン 6 2 ) の内径は、 第 1ハウジング 3 7の基端部 3 7 a (基端部構成ハウジング 4 1 ) の外径以上に設定され、 コイルアセンブリ (コイルボビン 6 2 ) の外 径は、 外覆部材 6 1の内径以下に設定されている。 Note that, when the first housing 37 and the second housing 39 are assembled, a projection 6 that fits into the hexagonal hole 58 of the adjust plug 50 is formed in the closed portion 63a of the resin mold 63. 6 are formed. The coil assembly (coil bobbin 6 The inner diameter of 2) is set to be equal to or greater than the outer diameter of the base end 37a of the first housing 37 (base end housing 41), and the outer diameter of the coil assembly (coil bobbin 6 2) 6 It is set to the inner diameter of 1 or less.
したがって、 第 2ハウジング 3 9は、 入力ソケッ ト部 6 3 bと反対側の端 部に開口部 3 9 aが形成され、 この開口部 3 9 aを介して第 1ハウジング 3 7の基端部 3 7 aをコイルボビン 6 2の内側に挿入させると共に、 外覆部材 6 1をコイルボビン 6 2の外側に配設させる構成となっている。 即ち、 第 1 ハウジング 3 7の基端部構成ハウジング 4 1と外覆部材 6 1との間に、 第 2 ハウジングのコイルアセンブリを揷入できる構成となっている。  Therefore, the second housing 39 has an opening 39a at the end opposite to the input socket portion 63b, and the base end of the first housing 37 is formed through the opening 39a. 37a is inserted inside the coil bobbin 62, and the outer cover member 61 is arranged outside the coil bobbin 62. That is, the coil assembly of the second housing can be inserted between the base end housing 41 of the first housing 37 and the outer cover member 61.
よって、 第 1ハウジング 3 7を第 2ハウジングに装着すると、 第 1ハウジ ング 3 7に設けられたプランジャ 3 5及び固定吸引子 5 2と、 第 2ハウジン グ 3 9に設けられたコイルアセンブリとによってソレノィ ド部が構成され、 このソレノィ ド部の内部に、 感圧室 5 1 b、 感圧素子 3 6、 圧縮ばね 5 4、 内部ばね 5 6等によって構成された感圧部が配設されることとなる。 そして、 コイル 3 8の周囲には、 外覆部材 6 1、 プランジャ 3 5、 固定吸引子 5 2、 基端部構成ハウジング 4 1の磁性部 4 1 b、 及び磁性板 6 5によって磁路が 構成されることとなる。 尚、 第 1ハウジング 3 7と第 2ハウジング 3 9とは、 外覆部材 6 1の開口端部に一体に形成されたかしめ部 6 l aを第 2ハウジン グ 3 9の樹脂モールド 6 3にかしめ付けて固定されている。  Therefore, when the first housing 37 is mounted on the second housing, the plunger 35 and the fixed suction element 52 provided in the first housing 37 and the coil assembly provided in the second housing 39 are used. A solenoid part is configured, and a pressure-sensitive part including a pressure-sensitive chamber 51 b, a pressure-sensitive element 36, a compression spring 54, an internal spring 56, and the like is disposed inside the solenoid part. It will be. A magnetic path is formed around the coil 38 by the outer cover member 61, the plunger 35, the fixed suction element 52, the magnetic part 41 b of the housing 41, and the magnetic plate 65. Will be done. In addition, the first housing 37 and the second housing 39 are caulked with a caulking portion 6 la integrally formed at the opening end of the outer cover member 61 to the resin mold 63 of the second housing 39. Is fixed.
以上の構成において、 コイル 3 8に通電して励磁すると、 図 2に示される ように、 プンラジャ 3 5と固定吸引子 5 2との間で吸引力が働き、 プンラジ ャ 3 5が固定吸引子 5 2に向って吸引され、 弁体 3 4は、 閉弁ばね 4 7の付 勢力によって閉弁方向に移動する。 この際、 プランジャロッ ド 6 0に段部を 形成し、 プランジャ 3 5が固定吸引子 5 2に吸着する手前でこの段部を固定 吸引子 5 2に当接させ、 プランジャ 3 5と固定吸引子 5 2との間に所定の隙 間を形成するようしてもよい。 弁孔 4 5の開度、 即ち、 弁体 3 4のリフ ト量は、 感圧室 5 1 bの圧力によ つて弁体 3 4が感圧素子 (ベローズ) 3 6から受ける力とコイル 3 8への通 電量によって決まるプランジャ 3 5の吸引力、 及び各種ばねのばね力の釣り 合いによって決定されるが、 コイル 3 8への通電量が一定であれば、 感圧室 5 1 bの圧力が高くなるほど感圧素子 (ベローズ) 3 6は収縮するので、 弁 孔 4 5の開度を大きくする付勢力は小さくなり、 感圧室 5 1 bの圧力が低く なるほど感圧素子 (ベロ一ズ) 3 6は伸長するので、 弁孔 4 5の開度を大き くする付勢力は大きくなる。 また、 感圧室 5 1 bの圧力が一定であれば、 コ ィル 3 8への通電量が多くなるほどプランジャ 3 5の吸引力は大きくなるの で、 弁孔 4 5の開度を大きくする付勢力は小さくなり、 コイル 3 8への通電 量が小さくなるほどプランジャ 3 5の吸引力は小さくなるので、 弁孔 4 5の 開度を大きくする付勢力は大きくなる。 In the above configuration, when the coil 38 is energized and excited, as shown in FIG. 2, an attractive force acts between the punjah 35 and the fixed attraction unit 52, and the punjawer 35 becomes the fixed attraction unit 5 as shown in FIG. The valve body 34 is moved in the valve closing direction by the biasing force of the valve closing spring 47. At this time, a step is formed in the plunger rod 60, and this step is brought into contact with the fixed suction element 52 before the plunger 35 is attracted to the fixed suction element 52, so that the plunger 35 and the fixed suction element A predetermined gap may be formed between the gap and the gap 52. The opening degree of the valve hole 45, that is, the lift amount of the valve body 34 is determined by the force that the valve body 34 receives from the pressure-sensitive element (bellows) 36 by the pressure of the pressure-sensitive chamber 51b and the coil 3 It is determined by the attraction force of the plunger 35 determined by the amount of electricity to the coil 8 and the balance of the spring forces of the various springs.If the amount of electricity to the coil 38 is constant, the pressure of the pressure-sensitive chamber 51b As the pressure rises, the pressure-sensitive element (bellows) 36 contracts, so the urging force for increasing the opening of the valve hole 45 decreases, and as the pressure in the pressure-sensitive chamber 51b decreases, the pressure-sensitive element (bellows) decreases. Since 36 extends, the urging force for increasing the opening of the valve hole 45 increases. Also, if the pressure of the pressure sensing chamber 51b is constant, the suction force of the plunger 35 increases as the amount of power to the coil 38 increases, so the opening of the valve hole 45 is increased. The urging force decreases, and as the amount of current to the coil 38 decreases, the attraction force of the plunger 35 decreases, so that the urging force for increasing the opening degree of the valve hole 45 increases.
これに対して、 コイル 3 8への通電が遮断され、 コイル 3 8が消磁される と、 プランジャ 3 5の吸引力はなくなるので、 プランジャ 3 5は、 図 3に示 すように、 固定吸引子 5 2との間に弾装された強制開放ばね 5 3により弁孔 4 5の開度を大きくする方向に弁体 3 4を付勢する。 この際、 強制開放ばね 5 3のバネカは閉弁ばね 4 7のパネ力よりも大きく設定され、 また、 プラン ジャロヅ ド 6 0はェンド部材 5 5の凹部 5 5 aに遊嵌されているので、 弁体 3 4は、 ベローズ 3 6によって閉弁方向に付勢されることなく、 閉弁ばね 4 7のパネ力に杭して弁孔 4 5の開度を増大する方向に変位して全開状態とな る。 このため、 吐出室 2 7とクランク室 6とが連通し、 高圧圧力 (吐出圧力 P d ) がクランク室 6に一気に流れ込むので、 クランク室 6の圧力が急増し、 斜板 2 0が最小傾動角へ移行する。 この際、 最小傾動角においてもピストン は僅かな量でストロークするが、 圧縮ガスは圧縮機吐出ポート部に設けた所 定の開弁圧を有する逆止弁 (図示せず) によって圧縮機外部への吐出が阻止 され、 全開状態となった制御弁内部を介して圧縮機内を内部循環する。 よって、 上述した構成によれば、 給気通路 3 1の開度を調節する従来と同 様の機能を持ちつつ、 ソレノィ ド部の内側に感圧部が配設されているので、 制御弁 3 2の軸方向寸法を小さくすることが可能となり、 圧縮機の小型化を 図ることが可能となる。 On the other hand, when energization of the coil 38 is cut off and the coil 38 is demagnetized, the plunger 35 loses its attraction force, so that the plunger 35 is fixed as shown in FIG. The valve element 34 is urged in a direction to increase the opening of the valve hole 45 by a forcible opening spring 53 mounted elastically between the valve element 52 and the valve hole 52. At this time, the spring force of the forcible opening spring 53 is set to be larger than the panel force of the valve closing spring 47, and the plunger rod 60 is loosely fitted in the concave part 55a of the end member 55. The valve element 34 is not urged in the valve closing direction by the bellows 36, but is displaced in a direction to increase the opening degree of the valve hole 45 by piled on the panel force of the valve closing spring 47, and is in a fully opened state. It becomes. As a result, the discharge chamber 27 and the crank chamber 6 communicate with each other, and a high pressure (discharge pressure P d) flows into the crank chamber 6 at a stretch, so that the pressure in the crank chamber 6 sharply increases and the swash plate 20 has a minimum tilt angle. Move to. At this time, the piston strokes by a small amount even at the minimum tilt angle, but the compressed gas is discharged to the outside of the compressor by a check valve (not shown) provided at the compressor discharge port and having a predetermined valve opening pressure. Is blocked, and circulates inside the compressor through the inside of the control valve that is fully opened. Therefore, according to the above-described configuration, since the pressure-sensitive part is provided inside the solenoid part while having the same function as the conventional one for adjusting the opening degree of the air supply passage 31, the control valve 3 The axial dimension of (2) can be reduced, and the size of the compressor can be reduced.
また、 コイル 3 8が消磁したときには、 強制開放ばね 5 3により弁体 3 4 を全開させ、 クランク室圧 (P c ) と吐出圧力 (P d ) とを強制的に均しく したので、 圧縮機が常に回転しているクラッチレスの可変容量型圧縮機に対 応させることが可能となる。  When the coil 38 was demagnetized, the valve body 34 was fully opened by the forcible release spring 53 to forcibly equalize the crank chamber pressure (Pc) and the discharge pressure (Pd). Can be used for clutchless variable displacement compressors that are always rotating.
ところで、 強制開放ばね 5 3を設けたことから、 コイル 3 8が消磁すると、 弁体 3 4が強制的に全開位置に移動することとなるので、 プランジャ 3 5と 固定吸引子 5 2との間隔 (エアギャップ) が大きくなる。 このため、 このよ うな全開状態からプランジャを引き寄せ、 弁体を再び稼動状態 (O N状態) に復帰させる場合には、 大きな吸引力が必要となる。 また、 ソレノイ ド部の 内部に感圧部が設けられると、 基端部構成ハウジング 4 1の磁性部 4 1わの 磁路巾が確保しにく くなるので、 このような観点からもプランジャの吸引力 を増大する必要がある。  By the way, since the forced release spring 53 is provided, when the coil 38 is demagnetized, the valve body 34 is forcibly moved to the fully open position, so that the distance between the plunger 35 and the fixed suction element 52 is increased. (Air gap) increases. Therefore, when the plunger is pulled from such a fully opened state and the valve body is returned to the operating state (ON state) again, a large suction force is required. Also, if a pressure-sensitive part is provided inside the solenoid part, it becomes difficult to secure the magnetic path width of the magnetic part 41 of the base-end housing 41. It is necessary to increase suction power.
そこで、 上述の構成においては、 図 5にも示されるように、 プランジャ 3 5と固定吸引子 5 2との対向面に、 軸に垂直な平面に対して所定の角度で同 方向に傾斜する錐面 7 0 a , 7 O bを形成し、 対向面間の距離を短くするこ とで、 同じ通電量でも磁束量を多く して吸引力の増大を図るようにしている。 特に、 この例においては、 プランジャ 3 5の周縁をテーパ状にカヅ トして錐 面 7 0 aを形成し、 固定吸引子 5 2の周縁をプランジャ側に突出させて錐面 7 0 bを形成することで、 供給電流が増大した場合に錐面 7 0 bを形成した 部分が磁気飽和を起して磁気吸引力の過剰な増加を抑え、 動作点をエアギヤ ップの小さいところに設定して吸引力を全体的に底上げするようにしている。 ここで、 発明者らの研究によれば、 プランジャ 3 5と固定吸引子 5 2との 14 対向面に形成されるそれそれの錐面 7 0 a, 7 O bは、 軸に垂直な平面に対 して約 40度であることが好ましいとの知見を得ている。 Therefore, in the above-described configuration, as shown in FIG. 5, the confronting surface of the plunger 35 and the fixed suction element 52 is provided with a cone inclined in the same direction at a predetermined angle with respect to a plane perpendicular to the axis. By forming the surfaces 70a and 70b and shortening the distance between the opposing surfaces, the amount of magnetic flux is increased even with the same amount of current to increase the attractive force. In particular, in this example, the periphery of the plunger 35 is cut into a tapered shape to form a conical surface 70a, and the periphery of the fixed suction element 52 is protruded toward the plunger to form a conical surface 70b. Therefore, when the supply current increases, the portion where the conical surface 70 b is formed causes magnetic saturation and suppresses an excessive increase in magnetic attraction, and the operating point is set to a place where the air gap is small. The suction force is raised as a whole. Here, according to the research of the inventors, the plunger 35 and the fixed suction element 52 14 It has been found that the conical surfaces 70a, 70b formed on the opposing surfaces are preferably at about 40 degrees with respect to a plane perpendicular to the axis.
ソレノィ ド部は、 要求仕様に基づき所定の制御特性 (即ち、 所定の電流に 対して、 所定の吸入圧力 P sに制御する特性) を得る必要があるので、 軸に 垂直な平面に対する錐面 7 0 a, 7 0 bの角度 (0) を変更した場合でも、 それそれの電流で発生する吸引力の相対差は同じでなければならない。  The solenoid section needs to obtain predetermined control characteristics based on required specifications (ie, characteristics for controlling a predetermined suction pressure P s for a predetermined current), so that the conical surface with respect to a plane perpendicular to the axis is required. Even if the angle (0) of 0a, 70b is changed, the relative difference of the attraction generated by each current must be the same.
このため、 上述の知見は、 軸に垂直な平面に対する錐面 7 0 a, 7 O bの 角度 (Θ) が 0° である場合に、 図 6に示されるように、 ある大きさのエア ギャップ g 1において所定の制御特性 (最大吸引力 MaxFと最小吸引力 MinFと の差) が得られていることから、 この制御特性を維持するような動作点を角 度 (0) を変化させた場合に見出せるかどうかを検証した結果に基づいてい る。  Therefore, the above findings indicate that when the angles (Θ) of the conical surfaces 70a and 70b with respect to a plane perpendicular to the axis are 0 °, as shown in FIG. Since a predetermined control characteristic (difference between the maximum suction force MaxF and the minimum suction force MinF) is obtained at g1, the operating point that maintains this control characteristic is changed when the angle (0) is changed. It is based on the result of verifying whether or not it can be found.
即ち、 0を 2 0度にすれば、 図 7に示されるように、 吸引力の差 (MaxF— MinF) が等しくなる動作点でのエアギャップは g 2と小さくなり (g 2 < g 1 ) 、 同じ供給電流でも吸引力が全体的に大きくなつた。 また、 0 = 3 0度、 40度と錐面 7 0 a, 70 bの角度を大きく していくと、 図 8及び図 9に示 されるように、 プランジャと固定吸引子との対向面のエアギヤヅプは g 3 , g 4とさらに小さくなり (g 4く g 3 < g 2) 、 同じ供給電流に対する吸引 力も徐々に大きくなる傾向が見られた。 ところが、 S = 5 0度とすると、 図 1 0に示されるように、 吸引力の差 (MaxF— MinF) が 0 = 0度と同じになる 動作点を見出すことができなくなった。 また、 軸に垂直な平面に対する角度 (Θ) が 40度を越えると、 プランジャ 3 5に対して軸方向のみならず、 径 方向にも吸引力が作用し、 プランジャ 3 5がコイルボビン 6 2の内壁に押し 付けられて、 摺動抵抗の増大によりプランジャ 3 5のスムーズな動きが阻害 されることとなる。 このため、 以上の結果から、 プランジャ 35と固定吸引 子 5 2との対向面に形成される錐面 7 0 a, 7 0 bの角度は、 軸に垂直な平 面に対して約 4 0度とすることが最も好ましいとの知見を得るに至った。 ところで、 錐面の角度 ( ) を 4 0度にした場合には、 g 4なるエアギヤ ヅプで 0 = 0度と同等の制御特性 (MaxF— MinF) が得られることとなるが、 実際には、 吸引力が全体的に大きくなるので、 同じ電流値であっても閉弁方 向の力が強くなり、 その結果、 クランク室が増大 (吐出容量が増大) して吸 入圧の制御値が低下する。 このため、 このような制御値の低下を修正するた めに、 アジャストプラグ 5 0で開弁方向への付勢力を調節し、 0 = 0度と同 等の制御特性を得るようにしている。 That is, if 0 is set to 20 degrees, as shown in FIG. 7, the air gap at the operating point where the suction force difference (MaxF−MinF) becomes equal becomes smaller as g2 (g2 <g1). However, even with the same supply current, the suction force increased as a whole. When the angles of the conical surfaces 70a and 70b are increased as 0 = 30 degrees and 40 degrees, as shown in Figs. 8 and 9, the opposing surfaces of the plunger and the fixed suction element are increased. The air gap was further reduced to g 3 and g 4 (g 4 <g 3 <g 2), and the attraction for the same supply current tended to increase gradually. However, assuming that S = 50 degrees, as shown in Fig. 10, it was impossible to find the operating point where the difference in suction force (MaxF-MinF) was the same as 0 = 0 degrees. If the angle (Θ) with respect to the plane perpendicular to the axis exceeds 40 degrees, suction force acts on the plunger 35 not only in the axial direction but also in the radial direction, so that the plunger 35 becomes an inner wall of the coil bobbin 62. , And the smooth movement of the plunger 35 is hindered by an increase in the sliding resistance. For this reason, from the above results, the angles of the conical surfaces 70 a and 70 b formed on the opposing surfaces of the plunger 35 and the fixed suction element 52 are flat angles perpendicular to the axis. It has been found that it is most preferable to set the angle to about 40 degrees with respect to the plane. By the way, when the angle () of the conical surface is set to 40 degrees, a control characteristic (MaxF—MinF) equivalent to 0 = 0 degrees can be obtained with an air gear of g4. However, since the suction force increases as a whole, the force in the valve closing direction increases even with the same current value, and as a result, the crank chamber increases (discharge capacity increases) and the control value of the suction pressure decreases. descend. Therefore, in order to correct such a decrease in the control value, the adjusting plug 50 adjusts the urging force in the valve opening direction to obtain a control characteristic equivalent to 0 = 0 degrees.
また、 上述の構成においては、 弁体が全開状態となる場合には、 プランジ ャロヅ ド 6 0がェンド部材 5 5の凹部 5 5 aに遊嵌されてその底部から離反 されるので、 プランジャ 3 5には、 ベロ一ズ 3 6やアジャストプラグ 5 0か らの力が作用しなくなる。 このため、 全開時においては、 錐面を形成したこ とによる吸引力の増加を純粋にプラン.ジャ 3 5を吸引するために用いること ができ、 制御弁 3 2を〇 N状態に復帰させる電流をさらに少なくすることが 可能となる。  In the above-described configuration, when the valve element is fully opened, the plunger rod 60 is loosely fitted into the concave part 55a of the end member 55 and is separated from the bottom thereof. The force from the bellows 36 and the adjust plug 50 does not work. For this reason, at the time of full opening, the increase in suction force due to the formation of the conical surface can be used purely to suck the jaw 35, and the current for returning the control valve 32 to the 〇N state can be used. Can be further reduced.
また、 感圧部をソレノィ ド部の内部に配設した場合には、 感圧素子 (ベロ —ズ) 3 6のセヅ ト圧を調節するアジヤス トプラグ 5 0が第 2ハウジング 3 9に覆われることになるが、 第 2ハウジング 3 9には、 アジャス トプラグ 5 0の六角孔 5 8に嵌合する突起 6 6が設けられているので、 第 1ハウジング 3 7を第 2ハウジング 3 9に揷着した後、 これらハウジング 3 7, 3 9を相 対的に回動させることでアジヤストプラグ 5 0を軸方向に変位させることが 可能となる。 このため、 アジャストプラグ 5 0が第 2ハウジング 3 9で覆わ る場合でも感圧素子 (ベローズ) 3 6のセッ ト圧を調節することが可能とな り、 所定の制御特性値が得られた時点で外覆部材 6 1のかしめ部 6 1 aを第 2ハウジングにかしめ付けることで、 双方のハウジング 3 7 , 3 9が軸方向 及び周方向に相対的にずれないように固定される。 したがって、 第 1ハウジ PC聽嶋" 432 When the pressure-sensitive part is arranged inside the solenoid part, the second housing 39 covers the adjust plug 50 for adjusting the set pressure of the pressure-sensitive element (bellows) 36. In other words, since the second housing 39 is provided with a projection 66 that fits into the hexagon hole 58 of the adjustment plug 50, the first housing 37 is attached to the second housing 39. After that, by rotating these housings 37, 39 relative to each other, it becomes possible to displace the adjust plug 50 in the axial direction. Therefore, even when the adjust plug 50 is covered with the second housing 39, the set pressure of the pressure-sensitive element (bellows) 36 can be adjusted, and when a predetermined control characteristic value is obtained. By caulking the caulking portion 61a of the outer cover member 61 to the second housing with the above, the two housings 37, 39 are fixed so as not to be relatively displaced in the axial direction and the circumferential direction. Therefore, the first housing PC Listening Island " 432
' 16 ング 3 7をわざわざ取り外し、 アジヤストプラグ 5 0の六角孔 5 8に六角レ ンチを揷着してベローズのセット圧を調節する作業が不要となり、 微調整を 簡易に行うことが可能となる。 " 'No need to remove the ring 37 and attach a hexagon wrench to the hexagon hole 58 of the adjust plug 50 to adjust the bellows set pressure, making fine adjustments easy. Become. "
尚、 上述の構成においては、 プランジャ 3 5と固定吸引子 5 2との対向面 に形成される錐面 7 0 a , 7 O bを、 プランジャ 3 5の周縁をテーパ状に力 ヅ トして形成すると共に、 固定吸引子 5 2の周縁をプランジャ側に突出させ て形成するようにしたが、 この関係を逆にして、 プランジャ 3 5の周縁を固 定吸引子側に突出させ、 固定吸引子 5 2の周縁をテーパ状にカツ トして形成 してもよい。 また、 上述の構成においては、 第 1ハウジング 3 7のアジヤス トプラグ 5 0に六角孔 5 8を、 また第 2ハウジング 3 9にこの六角孔 5 8と 嵌合する突起 6 6を設けるようにしたが、 六角孔 5 8とこれに嵌合する突起 6 6との位置関係を逆にし、 第 2ハウジングに六角孔を設け、 第 1ハウジン グにこれと嵌合する突起を設けるようにしてもよい。 産業上の利用可能性  In the above-described configuration, the conical surfaces 70 a and 70 Ob formed on the opposing surfaces of the plunger 35 and the fixed suction element 52 are pressed in such a manner that the peripheral edge of the plunger 35 is tapered. The fixed suction element 52 is formed by projecting the peripheral edge of the fixed suction element 52 toward the plunger side. 52 may be formed by cutting the peripheral edge into a tapered shape. Further, in the above-described configuration, the hexagonal hole 58 is provided in the adjust plug 50 of the first housing 37, and the protrusion 66 is formed in the second housing 39 to fit the hexagonal hole 58. Alternatively, the positional relationship between the hexagonal hole 58 and the projection 66 fitted thereto may be reversed, a hexagonal hole may be provided in the second housing, and a projection fitted to this may be provided in the first housing. Industrial applicability
以上述べたように、 この発明によれば、 ソレノイ ド部の内部に感圧部を配 設するようにしたので、 制御弁の軸方向寸法を短くすることが可能となり、 引いては、 コンプレヅサの小型化を図ることができる。  As described above, according to the present invention, since the pressure sensing portion is provided inside the solenoid portion, the axial dimension of the control valve can be shortened, and the compressor can be further reduced. The size can be reduced.
また、 強制開放手段を設けて、 コイルが消磁した場合に弁孔を強制的に開 放するようにしたので、 このような場合にクランク室圧を速やかに吐出圧に することが可能となり、 クラッチレスの可変容量型圧縮機に適した制御弁を 提供することが可能となる。  In addition, a forced opening means is provided to forcibly open the valve hole when the coil is demagnetized. In such a case, the crank chamber pressure can be quickly set to the discharge pressure, and the clutch This makes it possible to provide a control valve suitable for a variable displacement compressor.
そして、 感圧部をソレノイ ド部の内部に配設したことによる不都合は、 プ ランジャと固定吸引子との対向面に錐面を設けたことにより、 また、 弁体、 感圧部、 及び閉弁方向付勢手段を第 1ハウジングに収容し、 コイルを前記第 1ハウジングに組付け可能な第 2ハウジングに固設し、 第 1ハウジングに感 P T/JP2003/014432 The disadvantage of arranging the pressure-sensitive part inside the solenoid part is that the conical surface is provided on the opposing surface of the plunger and the fixed suction element. The valve direction urging means is housed in the first housing, and the coil is fixed to the second housing which can be assembled to the first housing, and the coil is fixed to the first housing. PT / JP2003 / 014432
17 圧部のセッ ト圧を調節するアジヤストプラグを設け、 第 2ハウジングに前記 アジャストプラグと嵌合可能な嵌合部を設け、 第 1ハウジングと第 2ハウジ ングとを組付けた場合に、 アジヤストプラグと嵌合部とを嵌合させてハウジ ング同士の相対的な回動を可能にしたことで解消することが可能となる。 即ち、 感圧部をソレノィ ド部の内部に配設したことで磁路巾が十分に確保 できない場合でも、 プランジャと固定吸引子との対向面に錐面を設けること で、 コイルへの供給電流を増加せずに吸引力の増大を図ることが可能となる, また、 感圧部を備えた第 1ハウジングとコイルを備えた第 2ハウジングとを 相対的に回動させて感圧部のセッ ト圧を調節できるようにすることで、 感圧 部がソレノィ ド部で覆われる場合でも、 感圧部のセット圧を容易に調節する ことが可能となる。  17 When an adjust plug for adjusting the set pressure of the pressure portion is provided, a fitting portion capable of fitting with the adjust plug is provided in the second housing, and the first housing and the second housing are assembled. The problem can be solved by fitting the adjust plug and the fitting portion to enable relative rotation between the housings. That is, even if the magnetic path width cannot be sufficiently secured due to the arrangement of the pressure-sensitive part inside the solenoid, the supply current to the coil can be increased by providing a conical surface on the opposing surface of the plunger and the fixed attractor. The suction force can be increased without increasing the pressure, and the first housing having the pressure sensing portion and the second housing having the coil are relatively rotated to set the pressure sensing portion. By adjusting the pressure, it is possible to easily adjust the set pressure of the pressure-sensitive part even when the pressure-sensitive part is covered with the solenoid.

Claims

請 求 の 範 囲 The scope of the claims
1 . 吐出圧領域とクランク室とを連通する給気通路上に設けられ、 前記 給気通路の開度を調節して前記クランク室の圧力を制御するようにしている 可変容量型圧縮機用制御弁において、  1. A control for a variable displacement compressor, which is provided on an air supply passage connecting a discharge pressure region and a crank chamber, and controls the pressure of the crank chamber by adjusting an opening degree of the air supply passage. In the valve,
前記吐出圧領域に通じる吐出圧力導入ポートと前記クランク室に通じる圧 力供給ポ一卜とを連通する弁孔と、  A valve hole communicating between a discharge pressure introduction port communicating with the discharge pressure region and a pressure supply port communicating with the crank chamber;
前記弁孔の開度を調節する弁体と、  A valve body for adjusting the opening of the valve hole,
吸入圧領域に通じる感圧室と、  A pressure-sensitive chamber communicating with the suction pressure area,
前記感圧室に導かれた流体の圧力に応じて応動し、 圧力が減少すると前記 弁孔の開度を増加させる方向へ前記弁体を付勢する感圧部と、  A pressure-sensitive portion that responds according to the pressure of the fluid guided to the pressure-sensitive chamber, and urges the valve body in a direction to increase the opening of the valve hole when the pressure decreases;
コイルの励磁により、 前記弁孔の開度を増加させる付勢力を低減するソレ ノィ ド部と、  A solenoid that reduces the biasing force that increases the opening of the valve hole by exciting the coil;
前記弁孔の開度を減少させる方向へ前記弁体を付勢する閉弁方向付勢手段 とを備え、  Valve closing direction urging means for urging the valve body in a direction to decrease the opening of the valve hole,
前記感圧部を前記ゾレノィ ド部の内部に配設するようにしたことを特徴と する可変容量型圧縮機用制御弁。  The control valve for a variable displacement compressor, wherein the pressure-sensitive part is disposed inside the solenoid part.
2 . 前記コイルの消磁により、 前記弁孔を強制的に開放する強制開放手 段を設けたことを特徴とする請求項 1記載の可変容量型圧縮機用制御弁。  2. The control valve for a variable displacement compressor according to claim 1, wherein a forced opening means for forcibly opening the valve hole by degaussing the coil is provided.
3 . 前記ソレノィ ド部には、 前記弁体に当接するプランジャを往復動可 能に収容するプランジャ室を有し、 このプランジャ室と前記感圧室との間に 固定吸引子を設け、 前記プランジャと前記固定吸引子との対向面に、 軸に垂 直な平面に対して所定の角度で同方向に傾斜する錐面を形成したことを特徴 とする請求項 1又は 2記載の可変容量型圧縮機用制御弁。  3. The solenoid section has a plunger chamber for reciprocally accommodating a plunger abutting on the valve element, and a fixed suction element is provided between the plunger chamber and the pressure-sensitive chamber. The variable-capacity compression according to claim 1, wherein a conical surface that is inclined in the same direction at a predetermined angle with respect to a plane perpendicular to an axis is formed on a surface opposing the fixed suction element and the fixed suction element. Control valve for machine.
4 . 前記プランジャと前記固定吸引子との対向面に形成される錐面は、 前記所定の角度が約 4 0度であることを特徴とする請求項 3記載の可変容量 型圧縮機用制御弁。 4. The control valve for a variable displacement compressor according to claim 3, wherein the predetermined angle of the conical surface formed on the opposing surface of the plunger and the fixed suction element is about 40 degrees. .
5 . 前記弁体、 前記感圧部、 及び前記閉弁方向付勢手段を収容する第 1 ハウジングと、 前記コイルを固設し、 前記第 1ハウジングに組付け可能な第 2ハウジングとを有し、 前記第 1ハウジングに前記感圧部のセッ ト圧を調節 するアジヤス トプラグを設け、 前記第 2ハウジングに前記アジヤストプラグ に嵌合可能な嵌合部を設け、 前記第 1ハウジングと前記第 2ハウジングとを 組付けた場合に、 前記アジヤストプラグと前記嵌合部とを嵌合させて前記ハ ウジング同士の相対的な回動を可能にしたことを特徴とする請求項 1乃至 4 のいずれか 1つに記載の可変容量型圧縮機用制御弁。 5. A first housing accommodating the valve element, the pressure sensing portion, and the valve closing direction urging means, and a second housing which is fixed to the coil and can be assembled to the first housing. The first housing is provided with an adjust plug for adjusting the set pressure of the pressure-sensitive portion, the second housing is provided with a fitting portion capable of fitting with the adjust plug, and the first housing and the second housing are provided. The housing according to any one of claims 1 to 4, wherein when the housing is assembled, the adjust plug and the fitting portion are fitted to each other to enable relative rotation between the housings. The control valve for a variable displacement compressor according to one of the above.
PCT/JP2003/014432 2002-12-24 2003-11-13 Control valve for variable capacity compressor WO2004059166A1 (en)

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JP2002-372705 2002-12-24

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Publication number Priority date Publication date Assignee Title
EP2952741B1 (en) * 2013-01-31 2019-03-13 Eagle Industry Co., Ltd. Variable capacity compressor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0727049A (en) * 1993-07-06 1995-01-27 Toyota Autom Loom Works Ltd External switching type capacity control valve for variable displacement compressor
EP1247981A2 (en) * 2001-04-06 2002-10-09 Fujikoki Corporation Control valve for variable capacity compressors
EP1256718A2 (en) * 2001-05-10 2002-11-13 Kabushiki Kaisha Toyota Jidoshokki Control valve for variable displacement compressor
EP1316726A2 (en) * 2001-11-30 2003-06-04 Fujikoki Corporation Control valve for variable-capacity compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0727049A (en) * 1993-07-06 1995-01-27 Toyota Autom Loom Works Ltd External switching type capacity control valve for variable displacement compressor
EP1247981A2 (en) * 2001-04-06 2002-10-09 Fujikoki Corporation Control valve for variable capacity compressors
EP1256718A2 (en) * 2001-05-10 2002-11-13 Kabushiki Kaisha Toyota Jidoshokki Control valve for variable displacement compressor
EP1316726A2 (en) * 2001-11-30 2003-06-04 Fujikoki Corporation Control valve for variable-capacity compressor

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