WO2022009795A1 - Soupape de régulation de capacité - Google Patents

Soupape de régulation de capacité Download PDF

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Publication number
WO2022009795A1
WO2022009795A1 PCT/JP2021/025135 JP2021025135W WO2022009795A1 WO 2022009795 A1 WO2022009795 A1 WO 2022009795A1 JP 2021025135 W JP2021025135 W JP 2021025135W WO 2022009795 A1 WO2022009795 A1 WO 2022009795A1
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WIPO (PCT)
Prior art keywords
valve
valve body
main
control
port
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Application number
PCT/JP2021/025135
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English (en)
Japanese (ja)
Inventor
貴裕 江島
大千 栗原
渉 ▲高▼橋
康平 福留
啓吾 白藤
Original Assignee
イーグル工業株式会社
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Application filed by イーグル工業株式会社 filed Critical イーグル工業株式会社
Priority to JP2022535294A priority Critical patent/JPWO2022009795A1/ja
Publication of WO2022009795A1 publication Critical patent/WO2022009795A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14—Control
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid

Definitions

  • the present invention relates to a capacity control valve that variably controls the capacity of a working fluid, for example, a capacity control valve that controls the discharge amount of a variable capacity compressor used in an automobile air conditioning system according to pressure.
  • Variable-capacity compressors used in air conditioning systems such as automobiles include a rotary shaft that is driven to rotate by an engine, a swash plate that is variably connected to a swash plate with a tilt angle, and a piston for compression that is connected to the swash plate.
  • the stroke amount of the piston is changed to control the discharge amount of the fluid.
  • the inclination angle of this swash plate is determined by the suction pressure Ps of the suction chamber that sucks the fluid and the discharge pressure Pd of the discharge chamber that discharges the fluid pressurized by the piston by using the capacity control valve that is driven to open and close by electromagnetic force. While utilizing the control pressure Pc of the control chamber accommodating the swash plate, the pressure in the control chamber can be continuously changed by appropriately controlling the pressure.
  • the capacity control valve When the capacity variable compressor is continuously driven, the capacity control valve is energized and controlled by a control computer, and the valve body is moved in the axial direction by the electromagnetic force generated by the solenoid, and the discharge port through which the discharge fluid of the discharge pressure Pd passes. Normal control is performed to adjust the control pressure Pc of the control chamber in the variable capacity compressor by opening and closing the main valve provided between the control port and the control port through which the control fluid of the control pressure Pc passes.
  • the pressure in the control chamber of the variable capacitance compressor is appropriately controlled, and the stroke amount of the piston is changed by continuously changing the tilt angle of the swash plate with respect to the rotation axis.
  • the amount of fluid discharged to the discharge chamber is controlled so that the air conditioning system has the target cooling capacity.
  • the main valve in the capacity control valve is closed to reduce the pressure in the control chamber, thereby maximizing the tilt angle of the swash plate.
  • an auxiliary communication passage is formed to communicate between the control port and the suction port of the capacity control valve, and the refrigerant in the control chamber of the variable capacity compressor at startup is of the variable capacity type through the control port, the auxiliary communication passage, and the suction port. It is also known that the responsiveness of the variable capacity compressor is improved by discharging the pressure to the suction chamber of the compressor and rapidly reducing the pressure in the control chamber at the time of starting (see Patent Document 1).
  • Patent Document 1 Although the fluid discharge function is excellent at the time of starting, the auxiliary communication passage is communicated and the refrigerant flows from the control port to the suction port when the capacity variable compressor is continuously driven. The amount of refrigerant circulation is large, and there is a risk that the operating efficiency of the variable capacity compressor will decrease.
  • the present invention has been made by paying attention to such a problem, and an object of the present invention is to provide a capacity control valve having a fluid discharge function at the time of starting and having good operation efficiency.
  • the capacitance control valve of the present invention is used.
  • a valve housing formed with a discharge port through which the discharge fluid of the discharge pressure passes, a suction port through which the suction fluid of the suction pressure passes, and a control port through which the control fluid of the control pressure passes.
  • a capacitance control valve including a main valve body driven by a solenoid, and a main valve provided between the discharge port and the control port and composed of a main valve seat with which the main valve body can contact.
  • a communication hole is formed, and the CS valve body is interlocked with the main valve body and slides to the valve housing. The communication hole is between the control port and the suction port according to the slide position of the CS valve body.
  • the CS valve has a spool valve structure, and the rate of increase in the opening of the communication hole with respect to the valve body stroke from before the fully opened state to the fully opened state can be increased from the time when the valve starts to open from the fully closed state.
  • the solenoid in the control valve is not energized and is not energized, the main valve is fully open and the CS valve is fully closed.
  • the rate of increase in the opening of the communication hole from the beginning of opening of the CS valve is small, so that fluid leakage is small and the operation efficiency of the capacity control valve is high.
  • the main valve When the variable capacity compressor is started, the main valve is fully closed and the CS valve is fully open, and the control port and the suction port are communicated with each other, so that the liquefied fluid in the control chamber is short in the suction chamber through the communication hole. It is discharged in time. In this way, the capacitance control valve can enhance the responsiveness at the time of starting the variable capacitance compressor.
  • the CS valve body may be composed of a separate member that can be separated from the main valve body. According to this, since the main valve body and the CS valve body can independently take the axis, the influence on each other's operation is suppressed, and the opening degree of the main valve and the CS valve can be adjusted with high accuracy. Can be done.
  • the main valve body and the CS valve body may be in contact with each other only in the axial direction. According to this, the influence on each other's operation due to the inclination or deviation of the axial center between the main valve body and the CS valve body can be suppressed.
  • the CS valve body may be urged in the closing direction by a spring. According to this, since the CS valve body follows the main valve body when the main valve is opened, the communication hole of the CS valve can be reliably closed.
  • the communication hole is a hole that penetrates in the radial direction, and the opening shape may be formed from a part of a circle. According to this, the opening degree of the communication hole can be gradually increased according to the valve body stroke.
  • the opening shape of the communication hole may be a circle. According to this, it is easy to process and form the communication hole for the CS valve body.
  • FIG. 5 is an enlarged cross-sectional view showing a state in which a communication hole is started to open from a fully closed state by a CS valve in an energized state (during normal control) of the capacity control valve of the embodiment.
  • FIG. 5 is an enlarged cross-sectional view showing a state in which the main valve is closed and the communication hole is fully opened by the CS valve in the maximum energized state (at the time of starting) of the capacity control valve of the embodiment. It is a figure explaining the opening area of the main valve and CS valve (communication hole) with respect to the stroke position of the main and sub-valve body of an Example. The stroke position on the horizontal axis is shown in the direction in which the main / sub valve body moves when a current is applied to the solenoid (direction from right to left in FIG. 2).
  • the capacity control valve according to the embodiment will be described with reference to FIGS. 1 to 6.
  • the left and right sides when viewed from the front side of FIG. 2 will be described as the left and right sides of the capacitance control valve.
  • the capacity control valve V of the present invention is incorporated in the variable capacity compressor M used in an air conditioning system such as an automobile.
  • the capacity control valve V variably controls the pressure of the working fluid (hereinafter, simply referred to as “fluid”) which is a refrigerant in the variable capacity compressor M.
  • fluid the working fluid which is a refrigerant in the variable capacity compressor M.
  • the capacity control valve V controls the discharge amount of the variable capacity compressor M and adjusts the air conditioning system so as to have a desired cooling capacity.
  • variable capacity compressor M As shown in FIG. 1, the variable capacity compressor M has a casing 1 including a discharge chamber 2, a suction chamber 3, a control chamber 4, and a plurality of cylinders 4a.
  • the variable capacity compressor M is provided with a communication passage (not shown) that directly communicates the control chamber 4 and the suction chamber 3.
  • a fixed orifice for balancing the pressure between the suction chamber 3 and the control chamber 4 is provided in this communication passage.
  • variable capacity compressor M includes a rotating shaft 5, a swash plate 6, and a plurality of pistons 7.
  • the rotary shaft 5 is rotationally driven by an engine (not shown) installed outside the casing 1.
  • the swash plate 6 is slantably connected to the rotating shaft 5 by a hinge mechanism 8 in the control chamber 4.
  • the plurality of pistons 7 are connected to the swash plate 6 and reciprocally fitted in each cylinder 4a.
  • FIG. 1 omits the illustration of the capacitance control valve V incorporated in the variable capacitance compressor M.
  • the capacitance control valve V is incorporated in the variable capacitance compressor M.
  • the main valve 50, the sub valve 55, and the CS valve 57 in the capacitance control valve V are controlled to open and close.
  • the pressure sensitive body 61 is operated by the suction pressure Ps in the intermediate communication passage 59, so that the pressure sensitive valve 53 is controlled to open and close.
  • the fluid flowing into or out of the control chamber 4 is controlled.
  • the control pressure Pc in the control chamber 4 is variably controlled.
  • the main valve 50 is composed of a main valve body 51 as a main valve body and a main valve seat 10a.
  • the main valve seat 10a is formed on the inner peripheral surface of the valve housing 10.
  • the main valve 50 opens and closes when the axial left end surface 51a of the main / sub valve body 51 comes into contact with the main valve seat 10a.
  • the pressure-sensitive valve 53 is composed of a cap 70 and a pressure-sensitive valve seat 52a.
  • the cap 70 is also a member constituting the pressure sensitive body 61.
  • the pressure-sensitive valve seat 52a is formed on the left end surface in the axial direction of the pressure-sensitive valve member 52.
  • the pressure-sensitive valve 53 opens and closes when the sealing surface 70a formed on the inner diameter side at the right end of the cap 70 in the axial direction is brought into contact with and separated from the pressure-sensitive valve seat 52a.
  • the sub-valve 55 is composed of a main sub-valve body 51 and a sub-valve seat 82a.
  • the auxiliary valve seat 82a is formed on the open end surface of the fixed iron core 82, that is, the left end surface in the axial direction.
  • the auxiliary valve 55 opens and closes when the axial right end surface 51b of the main auxiliary valve body 51 comes into contact with and separates from the auxiliary valve seat 82a.
  • the CS valve 57 is composed of a CS valve body 56 and a guide surface 10e.
  • the guide surface 10e is formed on the inner peripheral surface of the valve housing 10.
  • the capacitance control valve V includes a valve housing 10, a main / sub valve body 51, a pressure sensitive valve member 52, a contact member 54, a CS valve body 56, and a pressure sensitive body 61. It is mainly composed of a solenoid 80 and.
  • the valve housing 10 is made of a metal material or a resin material.
  • the main / sub valve body 51, the pressure sensitive valve member 52, the contact member 54, and the CS valve body 56 are arranged in the valve housing 10 so as to be reciprocally reciprocating in the axial direction.
  • the pressure-sensitive body 61 applies an urging force to the right in the axial direction to the main / sub-valve body 51, the pressure-sensitive valve member 52, and the contact member 54 according to the suction pressure Ps in the intermediate communication passage 59.
  • the solenoid 80 is connected to the valve housing 10 and exerts a driving force on the main / sub valve body 51, the pressure sensitive valve member 52, the contact member 54, and the CS valve body 56.
  • the solenoid 80 is mainly composed of a casing 81, a fixed iron core 82, a drive rod 83, a movable iron core 84, a coil spring 85, and a coil 86.
  • the casing 81 has an opening 81a that opens to the left in the axial direction.
  • the fixed iron core 82 is formed in a substantially cylindrical shape, is inserted from the left side in the axial direction with respect to the opening 81a in the casing 81, and is fixed to the inner diameter side of the casing 81.
  • the drive rod 83 is reciprocating in the axial direction on the inner diameter side of the fixed iron core 82, and its left end portion in the axial direction is connected and fixed to the right end portion in the main / sub valve body 51 in the axial direction.
  • the movable iron core 84 is fixed to the right end portion in the axial direction of the drive rod 83.
  • the coil spring 85 is provided between the fixed iron core 82 and the movable iron core 84, and urges the movable iron core 84 to the right in the axial direction.
  • the exciting coil 86 is wound around the outside of the fixed iron core 82 via a bobbin.
  • a recess 81b recessed to the right in the axial direction is formed on the inner diameter side of the left end portion of the casing 81 in the axial direction.
  • the right end portion of the valve housing 10 in the axial direction is inserted and fixed in the casing 81 in a substantially sealed shape with respect to the recess 81b.
  • the fixed iron core 82 is formed of a rigid body which is a magnetic material such as iron or silicon steel.
  • the fixed iron core 82 includes a cylindrical portion 82b and a flange portion 82d.
  • the cylindrical portion 82b is formed with an insertion hole 82c extending in the axial direction through which the drive rod 83 is inserted.
  • the flange portion 82d is an annular shape extending in the outer diameter direction from the outer peripheral surface of the left end portion in the axial direction of the cylindrical portion 82b.
  • a sub valve seat 82a is formed on the left end surface in the axial direction of the cylindrical portion 82b.
  • the valve housing 10 has a Pd port 12 as a discharge port, a first Ps port 13 as a suction port, a Pc port 14 as a control port, and a suction port in order from the solenoid 80 side.
  • the second Ps port 15 and the like are formed.
  • the Pd port 12 communicates with the discharge chamber 2 in the variable capacity compressor M.
  • the first Ps port 13 communicates with the suction chamber 3 in the variable capacity compressor M.
  • the Pc port 14 communicates with the control chamber 4 in the variable capacity compressor M.
  • the second Ps port 15 communicates with the suction chamber 3 in the variable capacity compressor M.
  • valve housing 10 has a bottomed substantially cylindrical shape by press-fitting the partition adjusting member 11 into the left end portion in the axial direction in a substantially sealed shape.
  • the partition adjusting member 11 can adjust the urging force of the coil spring 91 as a spring described later.
  • a main / sub valve body 51, a pressure sensitive valve member 52, an abutting member 54, and a CS valve body 56 are arranged so as to be reciprocating in the axial direction.
  • a small-diameter guide surface 10b is formed on the inner peripheral surface between the first Ps port 13 and the Pd port 12 of the valve housing 10 so that the outer peripheral surface of the main / sub valve body 51 can be slidably contacted in a substantially sealed state.
  • an annular step portion 10f having a substantially hat-shaped axial cross section is formed at the left end portion of the inner peripheral surface of the valve housing 10 in the axial direction (see FIGS. 3 to 5).
  • the annular step portion 10f is formed by an inner peripheral surface 10c, an annular groove 10d, and a guide surface 10e.
  • the inner peripheral surface 10c extends axially to the right from the axial left end surface of the valve housing 10.
  • the guide surface 10e is formed on an inner peripheral surface extending axially to the right from the axially right end of the annular groove 10d.
  • the guide surface 10e also has a function as a valve seat that is in sliding contact with the outer peripheral surface 56a of the CS valve body 56. Further, the above-mentioned second Ps port 15 is formed at the bottom of the annular groove 10d.
  • a first valve chamber 20, a second valve chamber 30, and a pressure-sensitive chamber 40 are formed inside the valve housing 10.
  • a Pd port 12, a first Ps port 13, and a Pc port 14 are communicated with the first valve chamber 20, the second valve chamber 30, and the pressure-sensitive chamber 40, respectively.
  • the left end surface 51a side in the axial direction of the main / sub valve body 51 is arranged in the first valve chamber 20.
  • the back pressure side of the main / sub valve body 51 that is, the axial right end surface 51b side is arranged.
  • a CS valve body 56 is arranged together with the pressure-sensitive body 61.
  • the second valve chamber 30 is defined by an outer peripheral surface of the main / sub valve body 51, an axial left end surface of the fixed iron core 82, and an inner peripheral surface of the valve housing 10 axially to the right of the guide surface 10b. ing.
  • the pressure sensitive body 61 is mainly composed of a bellows core 62 and a cap 70.
  • a coil spring 63 is built in the bellows core 62.
  • the cap 70 has a disk shape and is provided at the right end in the axial direction of the bellows core 62. The left end in the axial direction of the bellows core 62 is fixed to the partition adjusting member 11.
  • the pressure sensitive body 61 is arranged in the pressure sensitive chamber 40.
  • the sealing surface 70a of the cap 70 is seated on the pressure-sensitive valve seat 52a of the pressure-sensitive valve member 52 by the urging force that moves the cap 70 to the right in the axial direction by the coil spring 63 and the bellows core 62.
  • the main / sub valve body 51 is configured to have a substantially cylindrical shape.
  • a pressure-sensitive valve member 52 is connected and fixed to the left end portion in the axial direction of the main / sub valve body 51.
  • a drive rod 83 is connected and fixed to the right end portion in the axial direction of the main / sub valve body 51. Both of these are designed to move in the axial direction.
  • a minute gap is formed between the outer peripheral surface of the main / sub valve body 51 and the guide surface 10b of the valve housing 10 by slightly separating them in the radial direction. Due to this gap, the main / sub valve body 51 slides with respect to the valve housing 10 and can smoothly move relative to the axial direction.
  • an intermediate communication passage 59 that penetrates in the axial direction is formed by connecting a hollow hole.
  • the intermediate communication passage 59 can communicate with the second valve chamber 30 via the communication hole 83a formed at the left end portion in the axial direction of the drive rod 83 (see FIG. 2).
  • the fluid having a high pressure in the control chamber 4 may be liquefied when the variable capacity compressor M is left in a stopped state for a long time.
  • the pressure sensitive body 61 contracts and the pressure sensitive valve 53 is opened. As a result, the liquid refrigerant in the control chamber 4 is discharged to the suction chamber 3 in a short time via the intermediate communication passage 59.
  • the pressure sensitive valve member 52 has a substantially cylindrical shape with a flange having a first cylindrical portion 52b, a flange portion 52c, a second cylindrical portion 52d, and a contact portion 52e. It is configured.
  • the first cylindrical portion 52b is connected and fixed to the left end portion in the axial direction of the main / sub valve body 51.
  • the flange portion 52c is formed in an annular shape extending in the outer diameter direction from the outer peripheral surface of the left end portion in the axial direction of the first cylindrical portion 52b.
  • the second cylindrical portion 52d is formed on the left side of the flange portion 52c in the axial direction with a diameter smaller than that of the flange portion 52c, and the right end portion in the axial direction of the contact member 54 is connected and fixed.
  • the contact portion 52e is formed to have a smaller diameter than the second cylindrical portion 52d on the left side in the axial direction of the second cylindrical portion 52d. Further, the contact portion 52e is formed with a pressure-sensitive valve seat 52a that comes into contact with and separates from the sealing surface 70a of the cap 70 constituting the pressure-sensitive body 61.
  • the contact member 54 is configured to have a substantially cylindrical shape. Further, the contact member 54 is formed to have a diameter larger than that of the cap 70 constituting the pressure sensitive body 61.
  • the second cylindrical portion 52d of the pressure sensitive valve member 52 is connected and fixed to the right end portion in the axial direction of the abutting member 54. As a result, both the main / sub valve body 51 and the pressure sensitive valve member 52 move in the axial direction.
  • the axial left end surface 54a of the contact member 54 is axially in contact with the bottom surface of the concave portion 56c formed at the axial right end portion of the CS valve body 56.
  • a through hole 54b that penetrates in the radial direction is provided at the left end portion of the contact member 54 in the axial direction. The through hole 54b communicates the inner diameter side and the outer diameter side of the contact member 54 in the pressure sensitive chamber 40.
  • the CS valve body 56 is formed in a stepped cylindrical shape from a base portion 56b, a recessed portion 56c, an extending portion 56d, and a protruding portion 56e.
  • the base portion 56b is arranged concentrically with a diameter larger than that of the pressure sensitive body 61 in the pressure sensitive chamber 40, and is formed in a substantially cylindrical shape.
  • the recess 56c is formed in an annular shape in which the inner diameter side of the right end in the axial direction of the base 56b is recessed to the left in the axial direction.
  • the extending portion 56d is formed in a substantially cylindrical shape extending from the outer diameter side at the left end of the base portion 56b in the axial direction to the left in the axial direction.
  • the protruding portion 56e is formed in an annular shape that protrudes in the outer diameter direction from the outer peripheral surface of the left end portion in the axial direction of the extending portion 56d.
  • the outer peripheral surface 56a of the CS valve body 56 that is, between the outer peripheral surface of the base 56b and the guide surface 10e formed on the inner peripheral surface of the valve housing 10, the outer peripheral surface of the protruding portion 56e and the inner peripheral surface of the valve housing 10.
  • a minute gap is formed between the 10c and the 10c by being separated in the radial direction. Due to these gaps, the CS valve body 56 slides with respect to the valve housing 10 and can smoothly move relative to the axial direction.
  • a sealing portion Sa by a clearance seal is formed between the outer peripheral surface 56a of the CS valve body 56, that is, the outer peripheral surface of the base portion 56b and the guide surface 10e of the valve housing 10.
  • a sealing portion Sb by a clearance seal is formed between the outer peripheral surface of the protruding portion 56e and the inner peripheral surface 10c of the valve housing 10. That is, sealing portions Sa and Sb are formed on both sides in the axial direction with respect to the second Ps port 15.
  • the CS valve body 56 is provided with a protruding portion 56e.
  • an annular space 60 is formed between the valve housing 10 and the CS valve body 56.
  • the space 60 is sealed between the pressure-sensitive chamber 40 and the pressure-sensitive chamber 40 by the sealing portions Sa and Sb, and is communicated with the suction chamber 3 in the variable capacity compressor M by the second Ps port 15.
  • a plurality of communication holes 56f penetrating in the radial direction are provided in the substantially central portion of the base portion 56b of the CS valve body 56 in the axial direction.
  • the plurality of communication holes 56f can communicate the pressure sensitive chamber 40 and the space 60 on the inner diameter side and the outer diameter side of the CS valve body 56.
  • the communication hole 56f is formed of a through hole having a circular opening shape (see the balloon display portion in FIGS. 3 to 5) and a constant inner diameter. This makes it easier to process and form the communication hole 56f for the CS valve body 56.
  • the opening shape of the communication hole 56f is not limited to a circle, and may be formed from a part of a circle such as a semicircle, or may be formed into a triangle or an ellipse other than the circle.
  • the axial left end surface 54a of the contact member 54 is in axial contact with the bottom surface of the recess 56c formed at the axial right end of the CS valve body 56.
  • the inner diameter of the inner peripheral surface of the recess 56c is formed to be larger than the outer diameter of the contact member 54.
  • a recess 56g is formed at the left end portion in the axial direction due to the difference in inner diameter between the base portion 56b and the extending portion 56d. Further, the right end portion in the axial direction of the coil spring 91 is internally fitted in the recess 56g.
  • the coil spring 91 constitutes a pressure sensitive body 61 and a CS valve 57.
  • the right end of the coil spring 91 in the axial direction is in contact with the bottom surface of the recess 56g.
  • the left end of the coil spring 91 in the axial direction is in contact with the bottom surface of the recess 11b formed on the inner diameter side of the partition adjusting member 11.
  • the coil spring 91 urges the CS valve body 56 to the right in the axial direction, which is the valve closing direction of the CS valve 57.
  • the coil spring 91 is a compression spring.
  • the axial left end of the CS valve body 56 that is, the axial left end 56h of the extending portion 56d can be brought close to the axial right end surface 11a of the partition adjusting member 11 when the CS valve 57 is opened (FIG. FIG. 5).
  • the opening / closing mechanism of the CS valve 57 will be described.
  • the CS valve body 56 is closed by a coil spring 91 in a state where the main valve body 51 is in the valve open position.
  • An urging force (shown by a white arrow in FIG. 3) acts on the right side in the axial direction, which is the direction.
  • the communication hole 56f is separated from the axially right end of the annular groove 10d in the valve housing 10 to the right in the axial direction. Further, the bottom surface of the recess 56c is in contact with the axial left end surface 54a of the contact member 54.
  • the outer peripheral surface 56a of the CS valve body 56 forms a sealing portion Sa with a guide surface 10e and a clearance seal at least on the left side in the axial direction on the entire circumference of the communication hole 56f. That is, the communication hole 56f is completely closed by the sealing portion Sa. Further, a sealing portion Sb by a clearance seal is formed between the outer peripheral surface of the protruding portion 56e of the CS valve body 56 and the inner peripheral surface 10c of the valve housing 10. In this way, the CS valve 57 is fully closed by the sealed portions Sa and Sb.
  • FIGS. 3 to 5 shows the opening degree of the communication hole 56f as seen from the inner diameter side of the CS valve body 56, that is, the opening degree of the CS valve 57. Further, in the balloon display portion in FIGS. 3 to 5, the blocked portion at the opening of the communication hole 56f by the sealing portion Sa in the CS valve 57 is schematically shown by dots.
  • the solenoid 80 when the solenoid 80 is energized from the state where the main valve 50 is open, the main / sub valve body 51 moves to the left in the axial direction. As shown in FIG. 4, due to the movement of the main / sub valve body 51 to the left, the pressure sensitive valve member 52, the contact member 54, and the CS valve body 56 are pressed to the left in the axial direction and move together. The coil spring 91 contracts in response to this movement. As a result, until the stroke position P (see FIG. 6) is reached, that is, the axial left end of the communication hole 56f in the CS valve body 56 reaches the stroke position P that radially overlaps with the axial right end in the annular groove 10d.
  • the communication hole 56f is completely closed by the sealing portion Sa in the CS valve 57. Then, when the main / sub valve body 51 moves further to the left from the stroke position P, the pressure sensitive valve member 52, the contact member 54, and the CS valve body 56 are further pressed to the left in the axial direction and move together. The coil spring 91 further contracts accordingly. As a result, the communication hole 56f begins to be opened. That is, a part of the opening of the communication hole 56f begins to be opened (see the balloon display unit in FIG. 4). At this time, the main valve 50 is not yet closed.
  • the main / sub valve body 51 In the maximum energized state when the solenoid 80 is energized, the main / sub valve body 51 further moves to the left in the axial direction as shown in FIG. As a result, the main / sub valve body 51 moves to the valve closed position, the axial left end surface 51a of the main / sub valve body 51 comes into contact with the main valve seat 10a, and the main valve 50 is fully closed.
  • the left end 56h in the axial direction of the CS valve body 56 moves to a position close to the right end surface 11a in the axial direction of the partition adjusting member 11. That is, the CS valve body 56 has the maximum stroke position in the opening direction, and the communication hole 56f is fully opened. At this time, approximately half of the opening of the communication hole 56f is closed by the sealing portion Sa of the CS valve 57 (see the balloon display portion in FIG. 5).
  • variable capacity compressor M After leaving the variable capacity compressor M for a long time without using it, the variable capacity compressor M is started and the solenoid 80 in the capacity control valve V is energized so that the main valve 50 in the capacity control valve V is fully occupied. It is closed and the auxiliary valve 55 is fully opened. At this time, as shown in FIG. 5, when the main / sub valve body 51 strokes to the valve closing position, the pressure sensitive valve member 52, the contact member 54, and the CS valve body 56 move together to the left in the axial direction.
  • the left end 56h in the axial direction of the CS valve body 56 is close to the right end surface 11a in the axial direction of the partition adjusting member 11, and the communication hole 56f is fully opened.
  • the Pc port 14 and the second Ps port 15 are communicated with each other, and the liquefied fluid in the control chamber 4 is discharged into the suction chamber 3 through the communication hole 56f in a short time. Therefore, the capacitance control valve V can enhance the responsiveness of the capacitance variable compressor M at the time of starting.
  • the communication hole 56f is fully opened by the CS valve 57, so that the flow rate of the fluid discharged through the communication hole 56f becomes maximum.
  • the capacitance control valve V can further enhance the responsiveness of the capacitance variable compressor M at the time of starting. Further, since the suction pressure Ps in the intermediate communication passage 59 is high, the pressure sensitive valve 53 is opened as described above. Thereby, the capacitance control valve V can quickly release the control pressure Pc to the second valve chamber 30 through the communication hole 83a of the intermediate communication passage 59 and the drive rod 83. As described above, the capacity control valve V that discharges the liquefied fluid from the control chamber 4 into the suction chamber 3 in a short time by using the two flow paths opened by the CS valve 57 and the pressure sensitive valve 53 is provided. , The responsiveness of the variable capacity compressor M at startup can be improved.
  • the capacity control valve V of this embodiment closes the main valve 50 even when the control chamber 4 has the maximum capacity, opens the communication hole 56f by the CS valve 57, and connects the Pc port 14 and the second Ps port 15. Communicate.
  • the capacity control valve V of this embodiment can maintain the control pressure Pc and the suction pressure Ps at the same pressure (same pressure). Therefore, the stroke of the piston 7 in the cylinder 4a of the control chamber 4 is stable. Therefore, the capacity control valve V can maintain the state of the maximum capacity in the control chamber 4 and improve the operating efficiency of the variable capacity compressor M.
  • the non-energized state will be explained.
  • the main / sub valve body 51, the pressure sensitive valve member 52, and the contact member 54 are pressed to the right in the axial direction by the urging force of the pressure sensitive body 61. Therefore, the main valve 50 is fully opened.
  • the CS valve body 56 on which the urging force acts from the coil spring 91 to the right in the axial direction, which is the valve closing direction is in the valve closing position.
  • the communication hole 56f is fully closed by the sealing portion Sa in the CS valve 57. According to these, the communication hole 56f is closed by the sealing portion Sa in the CS valve 57.
  • control fluid passing through the Pc port 14 does not flow into the second Ps port 15. Therefore, the controllability of the variable capacity compressor M at the time of stopping the variable capacity compressor M and restarting after a short time has elapsed is high, and the operating efficiency of the capacity control valve V is high.
  • the opening degree and opening time of the main valve 50 are adjusted by the duty control of the capacitance control valve V.
  • the capacitance control valve V controls the flow rate of the fluid from the Pd port 12 to the Pc port 14.
  • the main / sub valve body 51 strokes toward the valve opening position side with respect to the stroke position P (see FIG. 6).
  • an urging force acts on the CS valve body 56 from the coil spring 91 to the right in the axial direction, which is the valve closing direction.
  • the communication hole 56f is maintained in a fully closed state by the sealing portion Sa in the CS valve 57.
  • the capacitance control valve V can improve the control accuracy of the control pressure Pc in the variable capacitance compressor M.
  • the main / sub valve body 51 moves to the stroke position P (see FIG. 6)
  • the axial left end of the communication hole 56f in the CS valve body 56 that moves together with the main / sub valve body 51 is the axial right end in the annular groove 10d. And overlap in the radial direction.
  • the main valve 50 is gradually closed, and the communication hole 56f is gradually opened by the CS valve 57.
  • a region where both the main valve 50 and the CS valve 57 (that is, the communication hole 56f) are opened can be set between the stroke position P of the main / sub valve body 51 and the valve closing position.
  • the balance of the opening area between the main valve 50 and the communication hole 56f can be adjusted according to the stroke position of the main / sub valve body 51.
  • the main valve 50 has a so-called poppet valve structure in which the opening area increases / decreases proportionally according to the stroke position of the main / sub valve body 51.
  • the CS valve 57 has a sealing portion Sa in which the outer peripheral surface 56a of the CS valve body 56 that moves together with the main / sub valve body 51 according to the stroke position of the main / sub valve body 51 and the guide surface 10e are in sliding contact with each other.
  • the CS valve 57 has a spool valve structure, and the opening area in the communication hole 56f provided in the CS valve body 56 is increased or decreased. Therefore, as shown in FIG. 6, when the communication hole 56f starts to open from the fully closed state, the opening degree increases substantially exponentially.
  • the opening degree of the communication hole 56f is not limited to a substantially exponential function, and the opening degree of the communication hole 56f is relative to the stroke of the main / sub valve body 51 before the communication hole 56f is fully opened immediately before the fully opened state rather than immediately after the communication hole 56f is fully closed by the CS valve 57. It is preferable that the rate of increase in the opening degree of the communication hole 56f is large (see FIG. 6). That is, during normal control in which the main / sub valve body 51 strokes in the vicinity of the stroke position P (see FIG. 6), the CS valve 57 can suppress the increase rate of the opening of the communication hole 56f with respect to the stroke of the main / sub valve body 51 to be small. can.
  • the CS valve 57 at the time of normal control can reduce the leakage of fluid from the Pc port 14 to the second Ps port 15 through the communication hole 56f.
  • the capacitance control valve V can enhance the responsiveness of the control that lowers the control pressure Pc in the variable capacitance compressor M.
  • the communication hole 56f is fully opened by the CS valve 57.
  • the capacity control valve V can quickly reduce the control pressure Pc when the liquid refrigerant is discharged from the control chamber 4 at the time of start-up or when the maximum capacity of the control chamber 4 is at the time of normal control.
  • the CS valve 57 does not have to be fully opened when the main valve 50 is fully closed.
  • the opening shape of the communication hole 56f is formed by a circle. Therefore, the opening degree of the communication hole 56f gradually increases in a gentle curved shape according to the stroke of the main / sub valve body 51 (see FIG. 6). This reduces fluid leakage during normal control. In addition, the opening area of the communication hole 56f quickly decreases from the fully open state.
  • the stroke position P (see FIG. 6) is adjusted by changing the forming position of the communication hole 56f in the axial direction of the CS valve body 56. Further, by changing the shape and size of the communication hole 56f, the rate of increase in the opening degree of the communication hole 56f and the maximum opening area according to the stroke of the main / sub valve body 51 are appropriately adjusted.
  • the main / sub valve body 51 constituting the main valve 50 and the CS valve body 56 constituting the CS valve 57 are composed of separate members that can be separated.
  • the main / sub valve body 51 and the CS valve body 56 can independently take the axis, so that the influence on each other's movement is suppressed. From this, the opening degrees of the main valve 50 and the CS valve 57 are adjusted with high accuracy.
  • the CS valve body 56 is in contact with the left end surface 54a in the axial direction of the contact member 54 only in the axial direction. From this, the influence of the inclination and the deviation of the axial center between the main / sub valve body 51 and the CS valve body 56 on the mutual operation is suppressed.
  • the CS valve body 56 is urged by the coil spring 91 to the right in the axial direction, which is the valve closing direction of the CS valve 57. Therefore, when the main valve 50 is opened, the CS valve body 56 follows the main / sub valve body 51, the pressure sensitive valve member 52, and the contact member 54. From this, the CS valve 57 is surely closed.
  • the CS valve body 56 has a substantially cylindrical shape.
  • An annular step portion 10f is formed on the inner circumference of the valve housing 10. Further, a part of the annular step portion 10f constitutes a guide surface 10e to which the outer peripheral surface 56a of the CS valve body 56 is in sliding contact. Therefore, the capacitance control valve V having the CS valve 57 has a simple structure.
  • the capacitance control valve V having the CS valve 57 has a simple structure.
  • the partition adjusting member 11 is provided at the left end portion in the axial direction of the valve housing 10. It is press-fitted and fixed. Since of such a structure, the capacity control valve V can be easily assembled.
  • the Pc port 14 is arranged at a position closer to the Pd port 12 than the second Ps port 15. Therefore, in the capacitance control valve V, the discharge pressure Pd can be easily transmitted to the control chamber 4 during normal control.
  • the configuration in which the main / sub valve body 51, the pressure sensitive valve member 52, the contact member 54, and the CS valve body 56 are configured as separate bodies has been described, but the present invention is not limited to this, and for example, the main / sub valve body is not limited to this.
  • the pressure-sensitive valve member 52 and the pressure-sensitive valve member 52 may be integrally configured, and the contact member 54 and the CS valve body 56 may be integrally configured.
  • the main / sub valve body 51, the pressure sensitive valve member 52, the contact member 54, and the CS valve body 56 may all be integrally configured.
  • the auxiliary valve does not have to be provided.
  • the right end in the axial direction of the main / sub valve body may function as a support member that receives an axial load, and does not necessarily need a sealing function.
  • the coil spring 91 as a spring is not limited to a compression spring, but may be a tension spring or may have a shape other than the coil shape.
  • the pressure sensitive body 61 may not use a coil spring inside.

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

Abstract

L'invention concerne une soupape de régulation de capacité qui est apte à fonctionner efficacement tout en présentant une fonction d'évacuation de fluide au démarrage.　Une soupape de régulation de capacité (V) comprend : un logement de soupape (10) qui présente, formé en son sein, un orifice d'évacuation (12), des orifices d'admission (13, 15) et un orifice de régulation (14) ; et une soupape principale (50) formée d'un corps de soupape principal (51) qui est entraîné par un solénoïde (80) et d'un siège de soupape principal (10a) qui est disposé entre l'orifice d'évacuation (12) et l'orifice de régulation (14) et avec lequel le corps de soupape principal (51) est apte à venir en contact, la soupape de régulation de capacité étant dotée d'une soupape CS (57) qui présente un corps de soupape CS (56) présentant un trou de communication (56f) formé en son sein et étant configurée pour se déplacer de façon coulissante sur le logement de soupape (10) conjointement avec le corps de soupape principal (51), et le trou de communication (56f) permettant à un canal d'écoulement entre l'orifice de régulation (14) et l'orifice d'admission (15) d'établir un raccordement conformément à la position de coulissement du corps de soupape CS (56).
PCT/JP2021/025135 2020-07-07 2021-07-02 Soupape de régulation de capacité WO2022009795A1 (fr)

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JP2020117314 2020-07-07

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020013156A1 (fr) * 2018-07-12 2020-01-16 イーグル工業株式会社 Vanne de contröle de capacité
WO2020013155A1 (fr) * 2018-07-12 2020-01-16 イーグル工業株式会社 Soupape de commande de capacité

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020013156A1 (fr) * 2018-07-12 2020-01-16 イーグル工業株式会社 Vanne de contröle de capacité
WO2020013155A1 (fr) * 2018-07-12 2020-01-16 イーグル工業株式会社 Soupape de commande de capacité

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