WO2020204131A1 - 容量制御弁 - Google Patents
容量制御弁 Download PDFInfo
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- WO2020204131A1 WO2020204131A1 PCT/JP2020/015175 JP2020015175W WO2020204131A1 WO 2020204131 A1 WO2020204131 A1 WO 2020204131A1 JP 2020015175 W JP2020015175 W JP 2020015175W WO 2020204131 A1 WO2020204131 A1 WO 2020204131A1
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- suction
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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
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- 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
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
- F16K31/0613—Sliding valves with cylindrical slides
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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
- F04B27/1804—Controlled by crankcase pressure
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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
- F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
- F04B27/0895—Component parts, e.g. sealings; Manufacturing or assembly thereof driving means
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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
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1009—Distribution members
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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
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- 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
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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
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1809—Controlled pressure
- F04B2027/1813—Crankcase pressure
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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
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1822—Valve-controlled fluid connection
- F04B2027/1827—Valve-controlled fluid connection between crankcase and discharge chamber
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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
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/184—Valve controlling parameter
- F04B2027/1854—External parameters
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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
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/184—Valve controlling parameter
- F04B2027/1859—Suction pressure
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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
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1863—Controlled by crankcase pressure with an auxiliary valve, controlled by
- F04B2027/1877—External parameters
-
- 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
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1863—Controlled by crankcase pressure with an auxiliary valve, controlled by
- F04B2027/1881—Suction pressure
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 rotating shaft that is rotationally driven by an engine, a swash plate that is variably connected to a swash plate at an inclination angle with respect to the rotating shaft, and a compression piston that is connected to the swash plate.
- the inclination angle of the swash plate is determined by the suction pressure Ps of the suction chamber that sucks the fluid, the discharge pressure Pd of the discharge chamber that discharges the fluid pressurized by the piston, using the capacitance control valve that is driven to open and close by electromagnetic force. It is possible to continuously change the pressure in the control chamber by appropriately controlling the pressure in the control chamber while utilizing the control pressure Pc in the control chamber containing the swash plate.
- 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 to control the control pressure in the control chamber of the capacity variable compressor. Normal control for adjusting Pc is performed.
- 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 inclination 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 a desired cooling capacity.
- the tilt angle of the swash plate is maximized by controlling the capacitance control valve to reduce the pressure in the control chamber of the variable capacitance compressor. It has become.
- an auxiliary communication passage is formed to communicate between the control port of the capacity control valve and the suction port, and the refrigerant in the control chamber of the variable capacity compressor is flown through the control port, auxiliary communication passage, and suction port at the time of start-up. It is also known that the responsiveness of a 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 startup (see Patent Document 1).
- Patent Document 1 Although the fluid discharge function at startup is excellent, since the auxiliary communication passage is always in communication, the control port is passed through the auxiliary communication passage when the capacitance variable compressor is continuously driven. There is a risk that the compression efficiency will be deteriorated due to the flow of the refrigerant into the suction port.
- the present invention has been made by paying attention to such a problem, and an object of the present invention is to provide a capacitance control valve having an excellent fluid discharge function at startup and high compression 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 rod driven by a solenoid and A CS valve composed of a CS valve seat and a CS valve body that opens and closes communication between the control port and the suction port.
- a DC valve composed of a DC valve seat and a DC valve body, arranged so as to be movable relative to the CS valve body, and opening and closing the communication between the discharge port and the control port by the movement of the rod.
- a pressure drive unit that is interlockably connected to the CS valve body, is formed in the valve housing, is arranged in the suction fluid supply chamber to which the suction fluid is supplied, and operates by suction pressure.
- the movement of the rod causes the CS valve body and the DC valve body to move together while maintaining the closed state of the CS valve, and when the rod moves further, the DC valve body moves while maintaining the closed state of the DC valve.
- the CS valve body moves independently, leaving the above. According to this, since the DC valve body is arranged so as to be relatively movable with respect to the CS valve body, it is possible to control the opening and closing of the DC valve while the CS valve is closed during normal control, and at the maximum.
- the control pressure can be reduced by opening the CS valve by moving the rod and communicating the control port and the suction port while maintaining the closed state of the DC valve, so that the fluid discharge function at startup It is possible to provide a capacitance control valve that is excellent and has high compression efficiency.
- the pressure drive unit can be operated to assist the driving force of the solenoid, which provides a stable fluid discharge function during startup.
- a capacitance control valve having compression performance can be provided.
- the DC valve body may be fitted onto the CS valve body, and the CS valve seat may be formed on the inner diameter portion of the DC valve body. According to this, by inserting the CS valve body through the DC valve body, the capacitance control valve having the DC valve can be compactly configured, and the closed state of the CS valve is surely maintained in the non-energized state and the normal control state.
- the DC valve body can be moved together with the CS valve body as it is.
- the CS valve seat may be formed at the other end of the DC valve body, and the DC valve seat may be formed on the outer diameter side thereof. According to this, a CS valve seat is formed on the inner diameter portion at the other end of the DC valve body, and a DC valve seat is formed on the outer diameter side thereof, so that the flow path can be switched by opening and closing the CS valve and the DC valve. The responsiveness is good because it is done smoothly.
- the DC valve body may be urged in the valve closing direction of the DC valve by the urging means. According to this, the DC valve body is surely maintained in the closed state with respect to the CS valve body in the non-energized state and the normal control, and the DC valve body is surely closed with respect to the DC valve seat in the maximum energized state. Can be maintained. In addition, since the DC valve body is urged in the moving direction of the rod by the urging means in the non-energized state and the normal control, the current applied to the solenoid can be reduced.
- the CS valve body may be formed with a communication portion that communicates with the suction fluid supply chamber. According to this, the structure of the valve housing can be simplified.
- a second suction port may be formed in the valve housing at a position where the pressure drive unit is not arranged. According to this, the structure of the CS valve body can be simplified.
- FIG. 5 is a cross-sectional view showing a state in which the DC valve is opened and the CS valve is closed in a non-energized state of the capacity control valve. It is sectional drawing which shows the pressure distribution when the DC valve and the CS valve are closed in the energized state (normal control time) of a capacitance control valve. In addition, in order to show the pressure distribution, the display of the cross section of each member is omitted.
- FIG. 2 is an enlarged cross-sectional view of FIG. 2 showing a state in which the DC valve is opened and the CS valve is closed in a non-energized state of the capacity control valve.
- FIG. 5 is an enlarged cross-sectional view showing a state in which the DC valve and the CS valve are closed in the energized state (normal control) of the capacitance control valve.
- FIG. 5 is an enlarged cross-sectional view showing a state in which the DC valve is closed and the CS valve is opened in the energized state (maximum energized state) of the capacity control valve. It is a figure explaining the opening / closing state of the DC valve with respect to the stroke position of the CS valve body in the capacity control valve, and the opening / closing state of the CS valve. It is sectional drawing which shows the state that the DC valve was opened and the CS valve was closed in the non-energized state of the capacity control valve of Example 2 which concerns on this invention.
- the capacity control valve according to the first embodiment will be described with reference to FIGS. 1 to 7.
- 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 a variable capacity compressor M used in an air conditioning system of an automobile or the like, and variably controls the pressure of a working fluid (hereinafter, simply referred to as “fluid”) as a refrigerant. Therefore, the discharge amount of the variable capacity compressor M is controlled to adjust the air conditioning system so as to have a desired cooling capacity.
- a working fluid hereinafter, simply referred to as “fluid”
- 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 connects the control chamber 4 and the suction chamber 3, and the pressure between the suction chamber 3 and the control chamber 4 is balanced in this communication passage.
- a fixed orifice is provided for adjustment.
- variable capacity compressor M is eccentrically connected to the rotary shaft 5 which is rotationally driven by an engine (not shown) installed outside the casing 1 and the rotary shaft 5 in the control chamber 4 by a hinge mechanism 8.
- a capacitance control valve V including a swash plate 6 to be formed and a plurality of pistons 7 connected to the swash plate 6 and fitted to reciprocate in each cylinder 4a and opened and closed by an electromagnetic force is used. While using the suction pressure Ps of the suction chamber 3 for sucking the fluid, the discharge pressure Pd of the discharge chamber 2 for discharging the fluid pressurized by the piston 7, and the control pressure Pc of the control chamber 4 accommodating the swash plate 6.
- the stroke amount of the piston 7 is changed to control the discharge amount of the fluid by continuously changing the inclination angle of the swash plate 6 by appropriately controlling the pressure in the control chamber 4.
- the capacity control valve V incorporated in the variable capacity compressor M is not shown in FIG. 1.
- the swash plate 6 is substantially perpendicular to the shaft 5, that is, is slightly inclined from the vertical.
- the stroke amount of the piston 7 is minimized, and the pressurization of the fluid in the cylinder 4a by the piston 7 is minimized, so that the amount of fluid discharged to the discharge chamber 2 is reduced and the cooling capacity of the air conditioning system is minimized. It becomes.
- the capacitance control valve V incorporated in the variable capacitance compressor M adjusts the current energizing the coil 86 constituting the solenoid 80, and the control port and the suction port in the capacitance control valve V A CS valve 50 that opens and closes communication, a combined control valve that controls opening and closing of a DC valve 54 that opens and closes communication between a discharge port and a control port, and a pressure-sensitive chamber 60 as an intake fluid supply chamber.
- the pressure sensitive body 61 as a pressure drive unit is operated by the suction pressure Ps in the above, and the control pressure Pc in the control chamber 4 is variably controlled by controlling the fluid flowing into the control chamber 4 or flowing out from the control chamber 4. are doing.
- the CS valve 50 is composed of a CS valve body 51 and a CS valve seat 53a formed at the inner diameter of the left end in the axial direction, which is the other end of the DC valve body 53, and is composed of the CS valve body 51.
- the CS valve 50 opens and closes when the step portion 51a formed substantially in the center of the axial direction is brought into contact with and separated from the CS valve seat 53a.
- the DC valve 54 is a central convex portion protruding in the inner diameter direction between the other end of the DC valve body 53 and the Pc port 15 and the Pd port 14 described later in the axial direction of the first valve housing 10 as the valve housing.
- the capacitance control valve V includes a first valve housing 10 and a second valve housing 12 as a valve housing formed of a metal material or a resin material, and a first valve housing 10 and a second valve housing.
- An axial urging force is applied to the CS valve body 51, the DC valve body 53, and the CS valve body 51 and the DC valve body 53 which are arranged in the 12 so as to be reciprocally reciprocated in the axial direction according to the suction pressure Ps.
- It is mainly composed of a pressure sensitive body 61 and a solenoid 80 connected to the second valve housing 12 and exerting a driving force on the CS valve body 51 and the DC valve body 53.
- the first valve housing 10 is controlled to communicate with the Ps port 13 as a suction port communicating with the suction chamber 3 of the variable capacity compressor M and the control chamber 4 of the variable capacity compressor M in order from the left side in the axial direction.
- a Pc port 15 as a port and a Pd port 14 as a discharge port communicating with the discharge chamber 2 of the variable capacity compressor M are formed.
- the solenoid 80 is inserted into the casing 81 having an opening 81a that opens to the left in the axial direction from the left side in the axial direction with respect to the opening 81a of the casing 81 and is located on the inner diameter side of the casing 81.
- a substantially cylindrical fixed iron core 82 to be fixed, and a drive rod 83 as a rod inserted through the fixed iron core 82 and reciprocating in the axial direction, and the left end portion 83a in the axial direction is inserted and fixed to the CS valve body 51.
- the movable iron core 84 into which the right end portion 83b of the drive rod 83 in the axial direction is inserted and fixed, and the movable iron core 84 provided between the fixed iron core 82 and the movable iron core 84 is the shaft in the valve closing direction of the CS valve 50. It is mainly composed of a coil spring 85 urging to the right in the direction and an exciting coil 86 wound around the outside of the fixed iron core 82 via a bobbin.
- the casing 81 is formed with a recess 81b in which the inner diameter side of the left end in the axial direction is recessed to the right in the axial direction, and the right end portion in the axial direction of the second valve housing 12 is inserted and fixed to the recess 81b in a substantially sealed shape. Has been done.
- the fixed iron core 82 is formed of a rigid body made of a magnetic material such as iron or silicon steel, and has a cylindrical portion 82b in which an insertion hole 82c extending in the axial direction and into which a drive rod 83 is inserted is formed, and an axial left end of the cylindrical portion 82b.
- An annular flange portion 82d extending in the outer diameter direction from the outer peripheral surface of the portion is provided.
- the fixed iron core 82 is a second valve housing 12 that is inserted and fixed to the recess 81b of the casing 81 in a state where the right end surface of the flange portion 82d in the axial direction is in contact with the bottom surface of the recess 81b of the casing 81.
- the inner diameter side of the right end in the axial direction is inserted and fixed in a substantially sealed shape with respect to the recess 12c recessed to the left in the axial direction.
- the drive rod 83 is formed in a columnar shape, and the axial left end portion 83a inserted and fixed to the CS valve body 51 and the axial right end portion 83b inserted and fixed to the movable iron core 84 form a plate shape. There is.
- the first valve housing 10 has a bottomed substantially cylindrical shape by press-fitting the partition adjusting member 17 into the left end portion in the axial direction in a substantially sealed shape.
- the partition adjusting member 17 can adjust the urging force of the pressure sensitive body 61 by adjusting the installation position of the first valve housing 10 in the axial direction.
- an annular step portion 10c protruding in the inner diameter direction is formed between the Ps port 13 and the Pc port 15, and a CS valve body is formed in the shaft hole 10d of the step portion 10c.
- a pressure sensitive chamber 60 is formed on the left side of the step portion 10c in the axial direction so as to communicate with the Ps port 13 and arrange the pressure sensitive body 61.
- the first valve housing 10 has a recess 10e formed by recessing the right end in the axial direction to the left in the axial direction, and the left end in the axial direction of the second valve housing 12 is inserted from the right in the axial direction to be integrally substantially substantially. It is connected and fixed in a sealed state.
- a first valve chamber 20 is formed which is communicated with the Pc port 15 and has a large diameter portion 51c (see FIGS. 4 to 6) on the left side in the axial direction of the CS valve body 51.
- a second valve chamber 30 is formed which is communicated with the Pd port 14 and in which the DC valve body 53 is arranged.
- the supply path 56 as a communication portion described later and the notch 51e (see FIGS. 4 to 6) are communicated with the Ps port 13 in the axial direction of the CS valve body 51.
- a third valve chamber 40 is formed in which the small diameter portion 51d on the right side (see FIGS. 4 to 6) and the axially right end portion of the DC valve body 53 are arranged.
- the CS valve body 51 and the DC valve body 53 are arranged so as to be reciprocating in the axial direction.
- a shaft hole 10f through which the large diameter portion 51c of the CS valve body 51 is inserted is formed substantially in the center in the axial direction.
- a DC valve seat 10b to which the outer diameter portion 53b at the left end in the axial direction of the DC valve body 53 can come into contact with the inner diameter portion substantially in the center of the first valve housing 10 is located at the right end in the axial direction of the central convex portion 10a. It is formed on the inner diameter.
- the first valve chamber 20 has a radial gap formed between the inner peripheral surface of the shaft hole 10f and the outer peripheral surface of the large diameter portion 51c of the CS valve body 51 at substantially the center of the first valve housing 10 in the axial direction. Through it, it is possible to communicate with the second valve chamber 30 or the third valve chamber 40. Specifically, as shown in FIGS. 2 and 4, when the CS valve 50 is closed and the DC valve 54 is opened, the second valve chamber 30 and the first valve chamber 20 are communicated with each other, and the first valve chamber is connected. 20 and the third valve chamber 40 are isolated. Further, as shown in FIGS.
- the CS valve body 51 has a large diameter portion 51c inserted into the shaft hole 10f of the first valve housing 10 and a large diameter portion 51c on the right side of the large diameter portion 51c in the axial direction.
- the DC valve body 53 which is formed to have a small diameter and has a cylindrical shape, is formed into a substantially cylindrical shape with a stepped shape from a small diameter portion 51d in which the DC valve body 53 is fitted in a non-sealed manner.
- the axial right end of the CS valve body 51 that is, the axial right end of the small diameter portion 51d, is fitted and fixed with the axial left end 83a of the drive rod 83 constituting the solenoid 80, both of which are axial.
- a supply path 56 extending in the axial direction from the right end in the axial direction to the left end in the axial direction is formed, and the left end portion in the axial direction of the supply path 56 is formed in the left end portion in the axial direction.
- the supply path 56 is communicated with the pressure sensitive chamber 60 via a notch 51e penetrating in the radial direction at the left end in the axial direction.
- a plate-shaped left end portion 83a of the drive rod 83 in the axial direction is inserted and fixed to the right end portion in the axial direction of the small diameter portion 51d of the CS valve body 51, and the right end portion 51b in the axial direction and the fixed iron core 82 are axially oriented. Since the left end is separated from the left end in the left-right direction of the axis at a predetermined interval, the plate surface of the axial left end portion 83a of the drive rod 83 and the inner peripheral surface of the small diameter portion 51d of the CS valve body 51 are communicated with each other. , The fluid can always circulate from the third valve chamber 40 to the supply path 56.
- the step portion 51a formed at substantially the center of the CS valve body 51 in the axial direction, that is, at the right end in the axial direction of the large diameter portion 51c is formed in a tapered shape that tapers toward the right in the axial direction in which the small diameter portion 51d is formed.
- the DC valve body 53 is brought into contact with and separated from the CS valve seat 53a formed at the inner diameter of the left end in the axial direction.
- the CS valve body 51 is formed in a constricted shape in which the outer peripheral surface is recessed toward the inner diameter side from the large diameter portion 51c to the small diameter portion 51d, so that the Pc from the Pc port 15 to the Ps port 13 when the CS valve 50 is opened.
- a large flow path area of the ⁇ Ps flow path (shown by the solid arrow in FIG. 6) can be secured.
- a coil spring 55 as an urging means is externally fitted to the axial right end of the small diameter portion 51d of the CS valve body 51, and the axial right end of the coil spring 55 is fixed. It is in contact with the axial left surface of the iron core 82, and the axial left end of the coil spring 55 is in contact with the axial right end, which is one end of the DC valve body 53.
- the coil spring 55 is a DC valve seat 10b in which the outer diameter portion 53b at the left end in the axial direction, which is the other end of the DC valve body 53, is formed at the inner diameter portion at the right end in the axial direction of the central convex portion 10a of the first valve housing 10.
- the coil spring 55 is set to have a smaller spring constant than the coil spring 63 provided in the pressure sensitive body 61.
- the pressure sensitive body 61 is mainly composed of a bellows core 62 in which a coil spring 63 is built and a disk-shaped adapter 70 provided at the right end in the axial direction of the bellows core 62.
- the left end of the bellows core 62 in the axial direction is fixed to the partition adjusting member 17.
- the pressure sensitive body 61 is arranged in the pressure sensitive chamber 60, and the axial right end of the adapter 70 is connected and fixed to the axial left end 51f of the CS valve body 51. That is, the driving force of the solenoid 80 to the left in the axial direction is applied to the pressure sensitive body 61 via the drive rod 83 and the CS valve body 51, and the pressure sensitive body 61 is applied in the axial direction according to the suction pressure Ps. You can receive the force.
- FIG. 3 shows a state in which the CS valve 50 and the DC valve 54 are closed in the energized state of the capacitance control valve V (during normal control).
- the control pressure Pc introduced from the Pc port 15 is the inner peripheral surface of the shaft hole 10f substantially central in the axial direction from the first valve chamber 20 to the first valve housing 10 and the CS valve body 51. It is distributed to the axial left side of the CS valve 50 closed and the inner diameter side of the closed DC valve 54 through a radial gap formed between the large diameter portion 51c and the outer peripheral surface.
- discharge pressure Pd introduced from the Pd port 14 is distributed from the second valve chamber 30 to the outer diameter side of the closed DC valve 54. Further, the suction pressure Ps introduced from the Ps port 13 is distributed in the pressure sensitive chamber 60 and also distributed to the inner diameter side of the CS valve 50 closed through the notch 51e and the supply path 56.
- the capacitance control valve V is shafted by the urging force of the coil spring 85 in which the movable iron core 84 constitutes the solenoid 80 or the urging force of the coil spring 63 and the bellows core 62 in the non-energized state.
- the drive rod 83 and the CS valve body 51 move to the right in the axial direction, and the step portion 51a of the CS valve body 51 is formed at the inner diameter portion of the left end in the axial direction of the DC valve body 53. It is seated on the CS valve seat 53a, and the CS valve 50 is closed.
- the urging force of the coil spring 55 acts on the DC valve body 53 to the left in the axial direction, and the urging force is supported by the CS valve body 51.
- the CS valve body 51 receives the urging force (F sp1 ) of the coil spring 85 via the drive rod 83 toward the right in the axial direction and the urging force (F bel ) of the pressure sensitive body 61 from the left end 51f in the axial direction. ), That is, the urging force of the bellows core 62 and the coil spring 63 and the urging force of the coil spring 55 (F sp2 ) are acting via the DC valve body 53 toward the left in the axial direction. That is, the force F rod ⁇ F sp2 acts on the CS valve body 51 with the rightward direction as positive.
- the force F rod F sp1 + F bel .
- the urging force (F sp2 ) of the coil spring 55 is smaller than the force F rod (F sp2 ⁇ F rod ). Furthermore, since the effect of pressure is small, it is omitted.
- the DC valve body 53 is pressed to the right in the axial direction by the CS valve body 51, so that the outer diameter portion 53b at the left end in the axial direction of the DC valve body 53 is separated from the DC valve seat 10b.
- the DC valve 54 is open.
- the energized state of the capacitance control valve V will be described.
- the electromagnetic force (F sol 1) generated by applying a current to the solenoid 80 in the energized state, that is, in the normal control, so-called duty control is the force F.
- the rod- F sp2 is exceeded (F sol 1> F rod- F sp2 )
- the movable core 84 is pulled toward the fixed core 82, that is, to the left in the axial direction, and the drive rod 83 and the CS valve body are fixed to the movable core 84.
- the outer diameter portion 53b of the DC valve body 53 is seated on the DC valve seat 10b by moving the 51 and the DC valve body 53 together to the left in the axial direction and pressing the pressure sensitive body 61 to the left in the axial direction to contract. Then, the DC valve 54 is closed.
- the CS valve body 51 is subjected to an electromagnetic force (F sol 1) to the left in the axial direction and an urging force (F sp2 ) of the coil spring 55 via the DC valve body 53.
- a force Frod is acting to the right in the axial direction. That is, the force F rod- F sp2- F sol 1 acts on the CS valve body 51 with the rightward direction as positive.
- the urging force (F sp2 ) of the coil spring 55 acting on the left side in the axial direction via the DC valve body 53 acts on the DC valve seat 10b, so that the CS valve body 51 is affected. Does not work. That is, the force F rod- F sol 1 acts on the CS valve body 51 with the rightward direction as positive.
- the capacity control valve V is set to the maximum energized state, that is, the energized state of the maximum duty during normal control, and the solenoid 80 is charged.
- the CS valve body 51 fixed to the drive rod 83 is the DC valve 54 because the electromagnetic force (F sol 2) generated by applying the maximum current exceeds the force F rod (F sol 2> F rod ).
- the CS valve body 51 independently moves to the left in the axial direction while leaving the DC valve body 53 while maintaining the closed state of the CS valve body 51, so that the step portion 51a of the CS valve body 51 has an inner diameter of the left end in the axial direction of the DC valve body 53.
- the CS valve 50 is opened apart from the CS valve seat 53a formed in the portion. According to this, the CS valve 50 is opened while maintaining the closed state of the DC valve 54, and a Pc-Ps flow path (shown by a solid arrow in FIG. 6) for communicating the Pc port 15 and the Ps port 13 is formed. .. That is, by communicating the control chamber 4 and the suction chamber 3, the control pressure Pc can be quickly lowered and the control pressure Pc and the suction pressure Ps can be maintained at a uniform pressure, so that the capacitance control valve V having high compression efficiency is provided. it can.
- the CS valve 50 can be opened and the Pc port 15 and the Ps port 13 can communicate with each other by setting the capacity control valve V to the maximum energized state. It is possible to provide a capacitance control valve V having an excellent fluid discharge function at start-up.
- FIG. 7 The horizontal axis of FIG. 7 indicates the stroke position where the CS valve body 51 moves with the current applied to the solenoid 80.
- the stroke position of the CS valve body 51 corresponding to the non-energized state of the solenoid 80 is zero, the CS valve 50 is closed and the opening area of the DC valve 54 is maximized.
- the opening area of the DC valve 54 in the Pd-Pc flow path decreases linearly according to the stroke position of the CS valve body 51 accompanying the current applied to the solenoid 80.
- the CS valve 50 is maintained in the closed state.
- the DC valve 54 and the CS valve 50 are closed.
- the stroke position of the CS valve body 51 passes the point P, the DC valve 54 is maintained in the closed state, and the opening area of the CS valve 50 in the Pc-Ps flow path is linear according to the stroke position of the CS valve body 51. It will increase like this.
- the opening and closing of the DC valve 54 and the CS valve 50 can be switched depending on the stroke position of the CS valve body 51 with respect to the point P, the controllability is improved.
- the suction pressure Ps acting on the pressure sensitive body 61 is high at the time of starting the capacitance control valve V, normal control, etc., and constitutes the pressure sensitive body 61.
- the force based on the suction pressure Ps exceeds the urging force of the bellows core 62 and the coil spring 63, the CS valve body 51 which is connected and fixed to the adapter 70 by connecting and fixing the left end 51f in the axial direction by contracting the pressure sensitive body 61 is the shaft.
- the CS valve 50 is attracted to the left in the direction and moves the CS valve body 51, the drive rod 83, and the movable iron core 84 to the left in the axial direction against the urging force of the coil spring 85 constituting the solenoid 80.
- the outer diameter portion 53b of the DC valve body 53 is seated on the DC valve seat 10b while maintaining the closed state, and the DC valve 54 is closed (see FIG. 5). Further, when the suction pressure Ps is sufficiently high, the CS valve body 51 is pulled to the left in the axial direction by further contracting the pressure sensitive body 61 from the state where the DC valve 54 is closed, and the coil spring 85.
- the step portion of the CS valve body 51 is maintained in the closed state.
- the 51a is separated from the CS valve seat 53a, and the CS valve 50 is opened (see FIG. 6).
- the capacitance control valve V having a stable fluid discharge function and compression performance at the time of starting is provided. it can.
- the CS valve 50 in the Pc-Ps flow path opened by the electromagnetic force (F sol 2) generated by applying the maximum current to the solenoid 80.
- the opening area can be expanded.
- the movement of the drive rod 83 causes the CS valve body 51 and the DC valve body 53 to move together while maintaining the closed state of the CS valve 50, and when the drive rod 83 further moves, the closed state of the DC valve 54 is changed.
- the CS valve body 51 moves independently, leaving the DC valve body 53 while maintaining the DC valve body 53.
- the DC valve body 53 is arranged so as to be relatively movable with respect to the CS valve body 51, it is possible to control the opening and closing of the DC valve 54 with the CS valve 50 closed during normal control.
- the control pressure Pc can be reduced by opening the CS valve 50 by moving the drive rod 83 and communicating the Pc port 15 and the Ps port 13 while maintaining the closed state of the DC valve 54. Therefore, it is possible to provide the capacitance control valve V which is excellent in the fluid discharge function at the time of starting and has high compression efficiency.
- the pressure sensitive body 61 can be operated to assist the driving force of the solenoid 80, so that the fluid at the time of stable starting is stable.
- a capacitance control valve V having a discharge function and compression performance can be provided.
- the CS valve body 51 is attached to the DC valve body 53.
- the capacitance control valve V having the DC valve 54 can be compactly configured, and the DC valve body 53 can be connected to the CS valve body 51 while reliably maintaining the closed state of the CS valve 50 during the non-energized state and the normal control. Can be moved with.
- the CS valve seat 53a is formed on the inner diameter portion on the left side in the axial direction, which is the other end of the DC valve body 53, and the DC valve seat 10b is formed on the outer diameter side thereof, the CS valve 50 and Since the flow path is smoothly switched by opening and closing the DC valve 54, the responsiveness is good.
- the DC valve body 53 is urged to the left in the axial direction, which is the valve closing direction of the DC valve 54, by the coil spring 55, the DC valve body 53 is a CS valve in the non-energized state and the normal control.
- the closed state can be reliably maintained with respect to the body 51, and the DC valve body 53 can reliably maintain the closed state with respect to the DC valve seat 10b in the maximum energized state.
- the DC valve body 53 is urged in the moving direction of the drive rod 83 by the coil spring 55 in the non-energized state and the normal control, the current applied to the solenoid 80 can be reduced.
- the CS valve body 51 is formed with a notch 51e communicating with the pressure sensitive chamber 60 and a supply path 56, the structures of the first valve housing 10 and the second valve housing 12 can be simplified.
- the capacitance control valve V' includes a first valve housing 10 and a second valve housing 12 as valve housings made of a metal or resin material, said second valve housing 12.
- a second Ps port 161 as a second suction port communicating with the suction chamber 3 of the variable capacity compressor M is formed independently of the Ps port 13.
- the second Ps port 161 communicates with the third valve chamber 40 formed inside the second valve housing 12.
- the left end portion in the axial direction of the supply path 56 formed inside the CS valve body 51 has a cylindrical shape and is connected to the adapter 70 in a substantially sealed shape so as to be contactable and detachable. There is.
- the notch 51e shown in the first embodiment is not formed, and the third valve chamber 40 is closed with respect to the pressure sensitive chamber 60 inside the first valve housing 10 and the second valve housing 12.
- the second suction port is formed in the second valve housing 12 at a position where the pressure sensitive body 61 is not arranged, the structure of the CS valve body 51 can be simplified.
- control characteristics of the CS valve body 51 may be changed by changing the spring constant of the coil spring 55.
- the coil spring 55 may be a tension spring.
- the tension spring may be arranged on the left side in the axial direction of the DC valve body 53 in a pulled state.
- the timing of opening and closing the CS valve 50 and the DC valve 54 according to the stroke position of the CS valve body 51 based on the driving force of the solenoid 80 is the axial arrangement of the DC valve body 53 with respect to the CS valve body 51 and the first valve housing 10.
- the position of formation of the DC valve seat 10b in the axial direction in the above, or the size and shape of the DC valve body 53 may be changed to make appropriate adjustments.
- the CS valve 50 is configured by bringing the CS valve body 51 into contact with and detaching from the CS valve seat 53a while maintaining the closed state of the DC valve 54
- the CS valve may have a spool valve structure.
- first valve housing 10 and the second valve housing 12 constituting the valve housing may have a part or all of them integrally formed.
- the pressure sensitive body 61 may have a bellows core 62 having an urging force without using a coil spring inside.
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Abstract
Description
吐出圧力の吐出流体が通過する吐出ポート、吸入圧力の吸入流体が通過する吸入ポートおよび制御圧力の制御流体が通過する制御ポートが形成されたバルブハウジングと、
ソレノイドにより駆動されるロッドと、
CS弁座とCS弁体とにより構成され前記制御ポートと前記吸入ポートとの連通を開閉するCS弁と、
DC弁座とDC弁体とにより構成され、前記CS弁体に対して相対移動可能に配置され、前記ロッドの移動により前記吐出ポートと前記制御ポートとの連通を開閉するDC弁と、
前記CS弁体と連動可能に連結され、前記バルブハウジングに形成され吸入流体が供給される吸入流体供給室に配置され吸入圧力により動作する圧力駆動部とを備え、
前記ロッドの移動により前記CS弁の閉塞状態を維持したまま前記CS弁体と前記DC弁体とが共に移動し、前記ロッドがさらに移動すると前記DC弁の閉塞状態を維持したまま前記DC弁体を残して前記CS弁体が単独で移動する。
これによれば、DC弁体はCS弁体に対して相対移動可能に配置されていることにより、通常制御時においてCS弁が閉塞された状態でDC弁を開閉制御することができるとともに、最大通電状態ではDC弁の閉塞状態を維持したままロッドの移動によりCS弁を開放し制御ポートと吸入ポートとを連通させることにより、制御圧力を低下させることができるため、起動時の流体排出機能に優れ、かつ高圧縮効率となる容量制御弁を提供できる。加えて、起動時や通常制御時等に、吸入流体供給室における吸入圧力が高いときには圧力駆動部を動作させてソレノイドの駆動力を補助することができるため、安定した起動時の流体排出機能と圧縮性能を有する容量制御弁を提供できる。
これによれば、DC弁体にCS弁体を挿通させることにより、DC弁を有する容量制御弁をコンパクトに構成できるとともに、非通電状態および通常制御時においてCS弁の閉塞状態を確実に維持したままDC弁体をCS弁体と共に移動させることができる。
これによれば、DC弁体の他端における内径部にCS弁座が形成され、その外径側にDC弁座が形成されることにより、CS弁およびDC弁の開閉による流路の切り換えがスムーズに行われるため、応答性が良い。
これによれば、非通電状態および通常制御時においてはDC弁体がCS弁体に対して閉鎖状態を確実に維持し、最大通電状態ではDC弁体がDC弁座に対して閉鎖状態を確実に維持できる。加えて、非通電状態および通常制御時においてDC弁体は付勢手段によりロッドの移動方向に付勢されることから、ソレノイドへの印加電流を少なくできる。
これによれば、バルブハウジングの構造を簡素にできる。
これによれば、CS弁体の構造を簡素にできる。
2 吐出室
3 吸入室
4 制御室
10 第1バルブハウジング(バルブハウジング)
10b DC弁座
12 第2バルブハウジング(バルブハウジング)
13 Psポート(吸入ポート)
14 Pdポート(吐出ポート)
15 Pcポート(制御ポート)
20 第1弁室
30 第2弁室
40 第3弁室
50 CS弁
51 CS弁体
51a 段部
51e 切り欠き(連通部)
53 DC弁体
53a CS弁座
53b 外径部
54 DC弁
55 コイルスプリング(付勢手段)
56 供給路(連通部)
60 感圧室(吸入流体供給室)
61 感圧体(圧力駆動部)
62 ベローズコア
63 コイルスプリング
70 アダプタ
80 ソレノイド
83 駆動ロッド(ロッド)
84 可動鉄心
85 コイルスプリング
161 第2Psポート(第2吸入ポート)
Pc 制御圧力
Pd 吐出圧力
Ps 吸入圧力
V,V’ 容量制御弁
Claims (6)
- 吐出圧の吐出流体が通過する吐出ポート、吸入圧の吸入流体が通過する吸入ポートおよび制御圧の制御流体が通過する制御ポートが形成されたバルブハウジングと、
ソレノイドにより駆動されるロッドと、
CS弁座とCS弁体とにより構成され前記制御ポートと前記吸入ポートとの連通を開閉するCS弁と、
DC弁座とDC弁体とにより構成され、前記CS弁体に対して相対移動可能に配置され、前記ロッドの移動により前記吐出ポートと前記制御ポートとの連通を開閉するDC弁と、
前記CS弁体と連動可能に連結され、前記バルブハウジングに形成され吸入流体が供給される吸入流体供給室に配置され吸入圧力により動作する圧力駆動部とを備え、
前記ロッドの移動により前記CS弁の閉塞状態を維持したまま前記CS弁体と前記DC弁体とが共に移動し、前記ロッドがさらに移動すると前記DC弁の閉塞状態を維持したまま前記DC弁体を残して前記CS弁体が単独で移動する容量制御弁。 - 前記DC弁体は前記CS弁体に外嵌されているとともに、前記DC弁体の内径部には前記CS弁座が形成されている請求項1に記載の容量制御弁。
- 前記CS弁座は、前記DC弁体の他端に形成され、その外径側には前記DC弁座が形成されている請求項2に記載の容量制御弁。
- 前記DC弁体は、付勢手段により前記DC弁の閉弁方向に付勢されている請求項1ないし3のいずれかに記載の容量制御弁。
- 前記CS弁体には、前記吸入流体供給室に連通する連通部が形成されている請求項1ないし4のいずれかに記載の容量制御弁。
- 前記バルブハウジングには、前記圧力駆動部が配置されない位置に第2吸入ポートが形成されている請求項1ないし4のいずれかに記載の容量制御弁。
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JP2021512301A JP7358022B2 (ja) | 2019-04-03 | 2020-04-02 | 容量制御弁 |
US17/599,539 US11841090B2 (en) | 2019-04-03 | 2020-04-02 | Capacity control valve |
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- 2020-04-02 WO PCT/JP2020/015175 patent/WO2020204131A1/ja unknown
- 2020-04-02 EP EP20783639.6A patent/EP3951173B1/en active Active
- 2020-04-02 CN CN202080026386.7A patent/CN113646528B/zh active Active
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US20220196168A1 (en) | 2022-06-23 |
EP3951173A1 (en) | 2022-02-09 |
JP7358022B2 (ja) | 2023-10-10 |
KR20210136128A (ko) | 2021-11-16 |
CN113646528A (zh) | 2021-11-12 |
US11841090B2 (en) | 2023-12-12 |
CN113646528B (zh) | 2023-05-26 |
EP3951173A4 (en) | 2022-12-21 |
EP3951173B1 (en) | 2024-06-19 |
JPWO2020204131A1 (ja) | 2020-10-08 |
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