WO2021241477A1 - 容量制御弁 - Google Patents
容量制御弁 Download PDFInfo
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- WO2021241477A1 WO2021241477A1 PCT/JP2021/019528 JP2021019528W WO2021241477A1 WO 2021241477 A1 WO2021241477 A1 WO 2021241477A1 JP 2021019528 W JP2021019528 W JP 2021019528W WO 2021241477 A1 WO2021241477 A1 WO 2021241477A1
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- WIPO (PCT)
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- pressure
- valve body
- valve
- sensitive
- slide valve
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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
- 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
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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
- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
- F16K3/267—Combination of a sliding valve and a lift valve
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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
- F16K31/0624—Lift valves
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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
- F04B2027/1831—Valve-controlled fluid connection between crankcase and suction 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
- F04B2027/1845—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
- F04B2027/184—Valve controlling parameter
- F04B2027/185—Discharge 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
- F04B2027/184—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
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/048—Electromagnetically actuated valves
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 at an inclination angle with respect to the rotary shaft, 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 in the control chamber of 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 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 the target cooling capacity.
- the main valve of 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 of the capacity control valve and the suction port, and the refrigerant in the control chamber of the variable capacity compressor is supplied to the variable capacity compressor through the control port, auxiliary communication passage, and suction port. It is also known that the responsiveness of the variable capacity compressor is improved by discharging the compressor to the suction chamber 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.
- the pressure-sensitive body placed in the pressure-sensitive chamber and A pressure-sensitive valve member extending from the valve body to the pressure-sensitive chamber and constituting the pressure-sensitive valve together with the pressure-sensitive body is provided.
- An intermediate communication passage is formed between the valve body and the pressure-sensitive valve member, and the control port and the suction port can be communicated with each other by the intermediate communication passage by opening and closing the pressure-sensitive valve.
- the pressure-sensitive valve member is formed with a through hole communicating with the intermediate communication passage, and a slide valve body that slides relative to the pressure-sensitive valve member in the pressure-sensitive chamber to open and close the through hole.
- the slide valve body divides the pressure-sensitive chamber into a Pd side space on the discharge port side and a Pc side space on the control port side, and the slide valve body communicates these two spaces with each other. A Pc flow path is formed.
- the pressure sensitive chamber is divided into a Pd side space communicating with the discharge port and a Pc side space communicating with the control port by the slide valve body, and when the main valve is controlled in the energized state, the main valve is used.
- the flow of fluid flowing from the discharge port to the control port can be supplied through the Pd-Pc flow path such as openings and notches formed in the slide valve body by opening the slide valve body, and the slide valve body can be made by utilizing the force of the fluid.
- control pressure can be quickly reduced by sliding the slide valve body toward the discharge port side using the pressure to open the through hole of the pressure sensitive valve member and communicating the control port and the suction port. In this way, it is possible to improve the discharge of the liquid refrigerant and the operating efficiency at the time of starting the variable capacity compressor.
- the slide valve body may slide along the outer peripheral surface of the pressure sensitive valve member. According to this, since it slides along the pressure-sensitive valve member, the through hole can be reliably closed.
- the Pd-Pc flow path may be formed by a communication hole that penetrates the slide valve body in the axial direction. According to this, it becomes easy to adjust the amount of fluid flowing out through the Pd-Pc flow path of the slide valve body according to the number and size of the communication holes, and the operation accuracy of the slide valve body can be improved.
- a plurality of Pd-Pc flow paths may be equally arranged in the circumferential direction. According to this, since the slide valve body can receive the force due to the fluid in a well-balanced manner, the slide valve body can be operated stably.
- a protrusion may be provided between the slide valve body and the flange portion formed on the tip end side of the through hole of the pressure sensitive valve member.
- the slide valve body may be provided with a protrusion protruding toward the flange portion. According to this, in a state where the through hole of the pressure sensitive valve member is closed by the slide valve body, it is possible to secure a large pressure receiving area by the side surface facing the space on the Pc side, so that the slide valve body is opened in the opening direction by the differential pressure. Easy to operate.
- the valve housing may be provided with a stopper that restricts the movement of the slide valve body in the opening direction. According to this, since the movement amount of the slide valve body can be defined by the stopper, the controllability of the slide valve body is high.
- FIG. 1 It is a schematic block diagram which shows the swash plate type variable capacity type compressor which incorporates the capacity control valve of Example 1 which concerns on this invention. It is sectional drawing which shows the appearance that the main valve was opened in the non-energized state of the capacity control valve of Example 1, and the through hole of a pressure sensitive valve member was closed by a slide valve body. It is an enlarged sectional view of FIG. When the capacity control valve and the variable capacity compressor of Example 1 are started (energized state), the slide valve body and the pressure sensitive valve member both move to the pressure sensitive body side from the state immediately after the main valve is closed, that is, the position before the start. It is an enlarged sectional view which shows the state of this.
- FIG. 5 is an enlarged cross-sectional view showing a state in which the main valve is opened and the through hole of the pressure sensitive valve member is closed by the slide valve body in the non-energized state of the capacity control valve according to the second embodiment of the present invention.
- FIG. 5 is an enlarged cross-sectional view showing a state in which the main valve is opened and the through hole of the pressure sensitive valve member is closed by the slide valve body in the non-energized state of the capacity control valve according to the third embodiment of the present invention.
- FIG. 5 is an enlarged cross-sectional view showing a state in which the main valve is opened and the through hole of the pressure sensitive valve member is closed by the slide valve body in the non-energized state of the capacity control valve according to the fourth embodiment of the present invention.
- the capacity control valve according to the first 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 left side of the paper surface on which the pressure sensitive body 60 is arranged will be described as the left side of the capacity control valve
- the right side of the paper surface on which the solenoid 80 is arranged will be described as the right side of the capacity control valve.
- the capacity control valve V1 of the present invention is incorporated in a capacity variable compressor M used in an air conditioning system such as an automobile, and variably controls the pressure of a working fluid (hereinafter, simply referred to as “fluid”) which is a refrigerant.
- a working fluid hereinafter, simply referred to as “fluid”
- the discharge amount of the variable capacity compressor M is controlled to adjust the air conditioning system so as to have the target cooling capacity.
- 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 connected to a rotary shaft 5 rotationally driven by an engine (not shown) installed outside the casing 1 so as to be tiltable with respect to the rotary shaft 5 in the control chamber 4 by a hinge mechanism 8.
- a capacitance control valve V1 having a swash plate 6 and a plurality of pistons 7 connected to the swash plate 6 and fitted reciprocally in each cylinder 4a and driven to open and close by 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.
- FIG. 1 omits the illustration of the capacitance control valve V1 incorporated in the variable capacitance compressor M.
- the swash plate 6 is substantially perpendicular to the axis 5, that is, is slightly tilted 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 V1 incorporated in the variable capacitance compressor M adjusts the current energized in the coil 86 constituting the solenoid 80, and the main valve 50 and the sub valve 54 in the capacitance control valve V1 are adjusted.
- the control pressure Pc in the control chamber 4 is controlled by controlling the opening / closing of the pressure sensitive valve 53 by the suction pressure Ps and controlling the fluid flowing into or out of the control chamber 4. It is variably controlled.
- the main valve 50 is a main valve formed on a main / sub valve body 51 as a valve body and an annular convex portion 10c having a pedestal shape such as a cross-sectional view protruding from the inner peripheral surface of the valve housing 10 toward the inner diameter side. It is composed of a seat 10a, and the main valve 50 opens and closes when the end surface 51a on the left side in the axial direction of the main / sub valve body 51 comes into contact with the main valve seat 10a.
- the sub-valve 54 is composed of a main sub-valve body 51 and an open end surface of the fixed iron core 82, that is, a sub-valve seat 82a formed on the end surface on the left side of the fixed iron core 82 in the axial direction, and is a shaft of the main sub-valve body 51.
- the sub-valve 54 opens and closes when the step portion 51b on the right side in the direction is brought into contact with and separated from the sub-valve seat 82a.
- the pressure-sensitive valve 53 includes an adapter 70 of the pressure-sensitive body 60 and a pressure-sensitive valve seat 52a formed on the end surface on the left side in the axial direction of the pressure-sensitive valve member 52, and the end surface 70a on the right side in the axial direction of the adapter 70 is a pressure-sensitive valve seat.
- the pressure-sensitive valve 53 opens and closes by being brought into contact with and separated from the 52a.
- the capacity control valve V1 has a valve housing 10 made of a metal material or a resin material, and a main / sub valve body 51 arranged so as to reciprocate in the valve housing 10 in the axial direction.
- 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 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 fixed core 82 having a substantially cylindrical shape to be fixed, a drive rod 83 that can reciprocate in the axial direction on the inner diameter side of the fixed core 82, and a drive rod 83 whose left end portion in the axial direction is connected and fixed to the main / sub valve body 51, and a drive rod.
- the casing 81 is formed with a recess 81b recessed to the right in the axial direction on the inner diameter side on the left side in the axial direction, and the right end portion in the axial direction of the valve housing 10 is inserted and fixed to the recess 81b in a substantially sealed shape. ing.
- the fixed iron core 82 is formed of a rigid body which is 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 an insertion hole 82c through 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 radial direction from the outer peripheral surface of the portion is provided, and a concave portion 82e recessed to the right in the axial direction is formed on the inner diameter side on the left side in the axial direction of the cylindrical portion 82b.
- the valve housing 10 has a Pd port 12 as a discharge port communicating with the discharge chamber 2 of the variable capacity compressor M and a suction port communicating with the suction chamber 3 of the variable capacity compressor M.
- a Ps port 13 as a port and a Pc port 14 as a control port communicating with the control chamber 4 of the variable capacity compressor M are formed.
- the 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 pressure sensitive body 60 by adjusting the installation position of the valve housing 10 in the axial direction.
- the main valve chamber 20 is communicated with the Pd port 12 and the end surface 51a side on the left side in the axial direction of the main / sub valve body 51 is arranged, and the back pressure side of the main / sub valve body 51 is communicated with the Ps port 13. That is, the feeling that the auxiliary valve chamber 30 in which the step portion 51b on the right side in the axial direction of the main auxiliary valve body 51 is arranged, and the pressure sensitive valve member 52, the slide valve body 90, and the pressure sensitive body 60 are arranged so as to communicate with the Pc port 14.
- a compression chamber 40 and the like are formed.
- a main / sub valve body 51 and a pressure-sensitive valve member 52 inserted / fixed to the main / sub valve body 51 are arranged so as to be reciprocally reciprocating in the axial direction, and the inner circumference of the valve housing 10 is provided.
- a small-diameter guide hole 10b is formed on the surface at the right end in the axial direction so that the outer peripheral surface of the main / sub valve body 51 can be slidably contacted in a substantially sealed state.
- the main valve chamber 20 and the sub valve chamber 30 are partitioned by an outer peripheral surface of the main sub valve body 51 and an inner peripheral surface of the guide hole 10b.
- a minute gap is formed between the inner peripheral surface of the guide hole 10b and the outer peripheral surface of the main / sub valve body 51 by slightly separating them in the radial direction, and the main / sub valve body 51 has a valve housing. It is possible to move smoothly in the axial direction with respect to 10.
- the pressure sensitive body 60 is mainly composed of a bellows core 61 having a built-in coil spring 62 and an adapter 70 provided at the right end in the axial direction of the bellows core 61.
- the end face on the left side in the axial direction of the above is fixed to the partition adjusting member 11.
- the pressure-sensitive body 60 is arranged in the pressure-sensitive chamber 40, and the end face 70a on the right side in the axial direction of the adapter 70 is moved by the urging force for moving the adapter 70 to the right in the axial direction by the coil spring 62 and the bellows core 61. It is designed to be seated on the pressure-sensitive valve seat 52a of the pressure-sensitive valve member 52. Further, the adapter 70 is adapted to apply a force to the left in the axial direction according to the suction pressure Ps in the intermediate communication passage 55.
- the main / sub valve body 51 is configured in a substantially cylindrical shape, and at the left end portion in the axial direction thereof, a separate pressure-sensitive valve member having a cylindrical shape with a flange and a side view substantially turret shape is formed.
- 52 is inserted and fixed in a substantially sealed shape
- a drive rod 83 is inserted and fixed in a substantially sealed shape at the right end portion in the axial direction thereof, both of which are movable in the axial direction. ..
- the labyrinth effect of the annular groove formed on the outer peripheral surface of the main / sub valve body 51 can suppress the leakage of the fluid from the main valve chamber 20 to the sub valve chamber 30, so that the Pd port from the discharge chamber 2 can be suppressed.
- the discharge pressure Pd of the discharge fluid supplied to the main valve chamber 20 via the 12 is maintained.
- an intermediate communication passage 55 penetrating in the axial direction is formed by connecting a hollow hole.
- the intermediate communication passage 55 communicates with the sub-valve chamber 30 via a plurality of through holes 51c penetrating in the radial direction at the right end portion in the axial direction of the main sub-valve body 51.
- the pressure sensitive valve member 52 is formed of a metal material or a resin material, and the right end portion in the axial direction thereof is inserted and fixed to the main / sub valve body 51 in a substantially sealed shape to form a slide valve body.
- a cylindrical base portion 52b into which the 90 is fitted and a pressure-sensitive valve seat 52a extending in the outer radial direction from the outer peripheral surface of the axially left end portion of the base portion 52b and contacting and separating from the axially right end surface 70a of the adapter 70 are formed. It is configured in a cylindrical shape with a flange having a flange portion 52c and a side view substantially turret shape.
- a plurality of through holes 52d that penetrate in the radial direction and communicate with the intermediate communication passage 55 are provided at the left end portion of the base portion 52b in the axial direction.
- the slide valve body 90 is formed of a member different from the pressure sensitive valve member 52, is externally fitted to the base portion 52b of the pressure sensitive valve member 52, and has a predetermined thickness dimension L1 in the axial direction. It is configured in an annular shape having (see FIG. 3).
- the thickness dimension L1 of the slide valve body 90 is larger than the diameter R1 (see FIG. 3) of the through hole 52d of the pressure sensitive valve member 52 (L1> R1).
- a through hole 90a through which the base portion 52b of the pressure sensitive valve member 52 is inserted is formed in the center thereof, and the outer diameter portion is a Pd penetrating in the axial direction.
- -A plurality of communication holes 90b as Pc flow paths are equally arranged in the circumferential direction.
- the slide valve body 90 is provided with eight communication holes 90b having the same diameter in the circumferential direction, but the present invention is not limited to this, and the diameter, number, and arrangement of the communication holes 90b are free. May be configured in.
- the inner diameter of the slide valve body 90 is larger than the outer diameter of the base portion 52b of the pressure sensitive valve member 52, and the inner diameter of the slide valve body 90 is larger than the outer diameter of the slide valve body 90 in the through hole 90a.
- the peripheral surface (hereinafter, simply referred to as “inner peripheral surface of the slide valve body 90”) is slidable with the outer peripheral surface 52 g of the base portion 52b of the pressure sensitive valve member 52.
- the outer diameter of the slide valve body 90 is larger than the outer diameter of the flange portion 52c of the pressure sensitive valve member 52, and the outer peripheral surface 90e of the slide valve body 90 is the inner peripheral surface 10d of the valve housing 10. It is placed in close proximity. Specifically, a minute gap is formed between the outer peripheral surface 90e of the slide valve body 90 and the inner peripheral surface 10d of the valve housing 10 by slightly separating them in the radial direction, and the slide valve body 90 is a valve. It can be smoothly moved relative to the housing 10 in the axial direction.
- the minute gap formed between the outer peripheral surface 90e of the slide valve body 90 and the inner peripheral surface 10d of the valve housing 10 is the inner peripheral surface of the slide valve body 90 and the outer peripheral surface 52 g of the base portion 52b of the pressure sensitive valve member 52. It is formed larger than the minute gap formed between the two.
- the communication hole 90b is formed at a position on the outer diameter side of the flange portion 52c of the pressure sensitive valve member 52.
- the slide valve body 90 has a Pd side space S1 that communicates the pressure sensitive chamber 40 with the Pd port 12 on the axial right side of the slide valve body 90, and a Pc that communicates with the Pc port 14 on the axial left side of the slide valve body 90. It is divided into a side space S2, and the Pd side space S1 and the Pc side space S2 are communicated with each other by a communication hole 90b. Between the Pd side space S1 and the Pc side space S2, the fluid mainly moves through the communication hole 90b and is formed between the outer peripheral surface 90e of the slide valve body 90 and the inner peripheral surface 10d of the valve housing 10. The amount of fluid that escapes in the minute gap is so small that it does not affect the reciprocating operation of the slide valve body 90, which will be described later.
- the side surface 90c on the left side in the axial direction of the slide valve body 90 is a pressure-sensitive valve when the through hole 52d of the pressure-sensitive valve member 52 in which the slide valve body 90 moves to the left in the axial direction is closed (see FIGS. 2 to 4).
- the flange portion 52c of the member 52 is in contact with the side surface 52e on the right side in the axial direction.
- the side surface 90c on the left side in the axial direction of the slide valve body 90 is larger than the flange portion 52c of the pressure sensitive valve member 52 when the through hole 52d of the pressure sensitive valve member 52 in which the slide valve body 90 moves to the left in the axial direction is closed.
- the outer diameter side is exposed to the Pc side space S2.
- the entire surface of the side surface 90d on the right side in the axial direction of the slide valve body 90 is exposed to the Pd side space S1 from the inner diameter side to the outer diameter side regardless of the movement of the slide valve body 90.
- the through hole 52d of the pressure sensitive valve member 52 is formed on the right side in the axial direction with respect to the side surface 52e on the right side in the axial direction of the flange portion 52c, and the slide valve body 90 is formed on the side surface 52e of the flange portion 52c of the pressure sensitive valve member 52.
- the slide valve body 90 is radially superimposed on the through hole 52d and the through hole 52d is maintained in a closed state from the state of contact to the axial position of the opening end on the left side in the axial direction of the through hole 52d. It is supposed to be done.
- the normal control time will be described.
- the flow rate of the fluid from the Pd port 12 to the Pc port 14 is controlled by adjusting the opening degree and the opening time of the main valve 50 by the duty control of the capacitance control valve V1.
- the fluid flowing in from the Pd port 12 due to the opening of the main valve 50 flows to the Pc port 14 through the communication hole 90b of the slide valve body 90 (shown by the solid line arrow in FIG. 3).
- a force for moving the slide valve body 90 to the left in the axial direction acts on the slide valve body 90.
- the 90 moves to the left in the axial direction, and the through hole 52d of the pressure sensitive valve member 52 is closed (see FIG. 3).
- the slide valve body 90 is subjected to the axial direction of the slide valve body 90.
- a force (FP1 ) due to the pressure of the fluid in the Pd side space S1 of the pressure sensitive chamber 40 acts, and the axial direction of the slide valve body 90 is directed to the right in the axial direction.
- the fluid flowing into the Pd side space S1 is a discharge fluid supplied from the Pd port 12 by opening the main valve 50, and is a control fluid supplied from the Pc port 14 to the Pc side space S2.
- the pressure receiving surface of the right side surface 90d is largely configured.
- the startup time After being left for a long time without using the variable capacity compressor M, the discharge pressure Pd, the control pressure Pc, and the suction pressure Ps are substantially in equilibrium.
- the fluid having a high pressure may be liquefied in the control chamber 4 when the variable capacity compressor M is left in a stopped state for a long time. Due to the high suction pressure Ps in the communication passage 55, the pressure sensitive body 60 contracts and operates so as to separate the end face 70a on the right side in the axial direction of the adapter 70 from the pressure sensitive valve seat 52a of the pressure sensitive valve member 52, thereby causing the pressure sensitive valve. Open 53.
- the suction pressure Ps when the suction pressure Ps is high at the time of starting, by opening the pressure sensitive valve 53, the liquid refrigerant in the control chamber 4 can be discharged to the suction chamber 3 via the intermediate communication passage 55 in a short time. It has become like.
- the capacitance control valve V1 has the movable iron core 84 to the right in the axial direction due to the urging force of the coil spring 85 constituting the solenoid 80 and the urging force of the coil spring 62 and the bellows core 61 constituting the pressure sensitive body 60.
- the drive rod 83, the main / sub-valve body 51, and the pressure-sensitive valve member 52 move to the right in the axial direction, and the step portion 51b on the right side in the axial direction of the main / sub-valve body 51 is the sub-valve of the fixed iron core 82.
- the auxiliary valve 54 is closed by sitting on the seat 82a, and the end surface 51a on the left side in the axial direction of the main auxiliary valve body 51 is separated from the main valve seat 10a formed on the inner peripheral surface of the valve housing 10, so that the main valve 50 is separated from the main valve seat 10a. It is open (see FIGS. 2 and 3). At this time, the slide valve body 90 is located to the left in the axial direction due to the force of the fluid due to the opening of the main valve 50 described above, and the through hole 52d of the pressure sensitive valve member 52 is closed.
- the movable iron core 84 is axially directed toward the fixed core 82 by the electromagnetic force generated by applying a current to the solenoid 80.
- the step portion 51b on the right side in the axial direction of the main / sub valve body 51 is separated from the sub valve seat 82a to open the sub valve 54, and the end surface 51a on the left side in the axial direction of the main / sub valve body 51 is the main valve. It sits on the seat 10a and the main valve 50 is closed (see FIG. 4).
- the slide valve body 90 is not affected by the force (P f) due to the flow of the fluid acting toward the left in the axial direction, but the slide.
- the valve body 90 moves axially to the left together with the pressure sensitive valve member 52 from the position before activation (see FIG. 3) to the position where the end surface 51a on the left side in the axial direction of the main / sub valve body 51 is seated on the main valve seat 10a.
- the closed state of the through hole 52d of the pressure sensitive valve member 52 is maintained. Even if the slide valve body 90 is slightly delayed from the movement of the pressure sensitive valve member 52, the slide valve body 90 moves due to inertia and is pressed against the side surface 52e of the flange portion 52c of the pressure sensitive valve member 52.
- control pressure Pc in the control chamber 4 may become high.
- the control pressure Pc in the Pc side space S2 of the pressure sensitive chamber 40 is high from the Pc port 14.
- the control fluid of Pc flows in.
- the force (FP2 ) due to the pressure of the fluid acting to the right in the axial direction with respect to the slide valve body 90 temporarily becomes the force due to the pressure of the fluid acting to the left in the axial direction with respect to the slide valve body 90. It becomes larger than (FP1' ) (FP1' ⁇ FP2 ) and moves to the right in the axial direction to the slide valve body 90 due to the differential pressure acting on the side surfaces 90c and 90d on both sides in the axial direction of the slide valve body 90.
- a force (shown by a white arrow in FIG. 5) acts to open the through hole 52d of the pressure-sensitive valve member 52 (see FIG. 5).
- the slide valve body 90 can be moved to the right in the axial direction by the differential pressure generated between the two, and the through hole 52d of the pressure sensitive valve member 52 can be reliably opened.
- the fluid in the Pd side space S1 is compressed as the slide valve body 90 moves to the right in the axial direction.
- the pressure in the Pd side space S1 increases, and the slide valve body 90 stops at a position where the pressure in the Pd side space S1 and the pressure in the Pc side space S2 are in equilibrium.
- the main valve 50 is closed, the pressure in the Pd side space S1 and the pressure in the Pc side space S2 are balanced and the state in which the slide valve body 90 is stopped is maintained, but the main valve 50 is opened and the main valve 50 is opened.
- the slide valve body 90 opens the through hole 52d of the pressure sensitive valve member 52 at the time of starting, the pressure sensitive chamber 40 communicates with the intermediate communication passage 55 through the through hole 52d and the fluid flows. (Illustrated by a solid arrow in FIG. 5). That is, the slide valve body 90 opens the through hole 52d of the pressure sensitive valve member 52, so that the control chamber 4, the Pc port 14, the pressure sensitive chamber 40, the through hole 52d, the intermediate communication passage 55, the auxiliary valve chamber 30, and the Ps port are opened. Since the flow path for discharging the fluid is formed in the order of 13 and the suction chamber 3, the liquefied fluid in the control chamber 4 can be discharged in a short time to improve the responsiveness at the time of starting.
- the control chamber 4 is opened by opening the through hole 52d of the pressure sensitive valve member 52. It is possible to form a flow path for discharging the fluid into the suction chamber 3 via the intermediate communication passage 55.
- the pressure sensitive chamber 40 is divided into the Pd side space S1 communicating with the Pd port 12 and the Pc side space S2 communicating with the Pc port 14 by the slide valve body 90, and the capacity control valve V1 is normally controlled.
- the opening of the main valve 50 allows the flow of fluid flowing from the Pd port 12 to the Pc port 14 to be supplied through the communication hole 90b formed in the slide valve body 90, and the force of the fluid is used to supply the slide valve body.
- the control pressure Pc of the control chamber 4 becomes high when the main valve 50 is closed at the time of starting by moving the 90 to the left in the axial direction to close the through hole 52d of the pressure sensitive valve member 52, the capacity is variable type.
- slide valve body 90 slides along the outer peripheral surface 52 g of the base portion 52b of the pressure sensitive valve member 52, so that the through hole 52d of the pressure sensitive valve member 52 can be reliably closed by the slide valve body 90.
- slide valve body 90 and the base portion 52b of the pressure sensitive valve member 52 are preferably formed of different materials, frictional resistance is reduced, and the slide valve body 90 can slide smoothly.
- the slide valve body 90 is formed with a communication hole 90b as a Pd-Pc flow path that communicates the Pd port 12 and the Pc port 14, and the fluid is formed according to the number and size of the communication holes 90b. The amount of pulling out can be easily adjusted, and the operating accuracy of the slide valve body 90 can be improved.
- a plurality of communication holes 90b are equally arranged in the circumferential direction, and the side surfaces 90c and 90d on both sides in the 90-axis direction of the slide valve body can receive the force due to the fluid in a well-balanced manner, so that the slide valve body 90 can be stably arranged. Can be operated.
- a notch 190b is formed in the outer diameter portion of the ring of the slide valve body 190 as shown in the modified example of FIG.
- a Pd-Pc flow path may be formed by the outer peripheral surface of the slide valve body 190 and the inner peripheral surface 10d of the valve housing 10 (see the two-dot chain line in FIG. 7). .. Further, the shape, number, and arrangement of the notches 190b may be freely configured. Furthermore, the notch configuration in this modification is also applicable to the slide valve bodies of the following Examples 2, 3 and 4.
- the slide valve body 90 has a thickness dimension L1 larger than the diameter R1 of the through hole 52d of the pressure sensitive valve member 52 (L1> R1) (see FIG. 3), and the side surface 52e of the flange portion 52c of the pressure sensitive valve member 52. Since the through hole 52d of the pressure sensitive valve member 52 can be maintained in a state of being in contact with the side surface 90c on the left side in the axial direction until it slides to the right in the axial direction by a predetermined distance or more, disturbance such as vibration can be maintained. Even if the slide valve body 90 slides slightly, the through hole 52d of the pressure sensitive valve member 52 is maintained in a closed state. Therefore, the capacitance control valve V1 is resistant to disturbance and has excellent control accuracy.
- the slide valve body 90 can be moved to the right in the axial direction due to the differential pressure generated between the Pd side space S1 and the Pc side space S2 at the time of starting, the through hole 52d of the pressure sensitive valve member 52 is opened. Therefore, it is not necessary to separately provide an urging means such as a spring, and the number of parts of the capacitance control valve V1 can be reduced.
- the slide valve body 290 is integrally provided with an annular protrusion 290e projecting to the left in the axial direction from the inner diameter portion of the side surface 290c on the left side in the axial direction.
- the protrusions 290e are not limited to those formed in an annular shape, and a plurality of protrusions 290e may be equally arranged in the circumferential direction. Further, the protrusion 290e may have a member separate from the slide valve body 290 fixed to the side surface 290c.
- the tip surface of the protrusion 290e abuts on the side surface 52e of the flange portion 52c of the pressure sensitive valve member 52, whereby the slide valve Since the side surface 290c on the left side in the axial direction of the body 290 and the side surface 52e of the flange portion 52c of the pressure sensitive valve member 52 are prevented from coming into contact with each other, the slide valve body 290 can be easily separated from the pressure sensitive valve member 52. The responsiveness of the slide valve body 290 can be enhanced.
- the pressure receiving area by the side surface 290c exposed to the Pc side space S2 in a state where the through hole 52d of the pressure sensitive valve member 52 is closed by the slide valve body 290 Since it is possible to secure a large amount up to the inner diameter side, it is easy to operate the slide valve body 290 in the opening direction by utilizing the differential pressure generated between the Pd side space S1 and the Pc side space S2.
- the pressure sensitive valve member 352 is an annular protrusion protruding to the right in the axial direction from the outer diameter portion of the side surface 352e on the right side in the axial direction of the flange portion 352c.
- the 352f is integrally provided.
- the protrusions 352f are not limited to those formed in an annular shape, and a plurality of protrusions 352f may be equally arranged in the circumferential direction. Further, the protrusion 352f may have a member separate from the pressure sensitive valve member 352 fixed to the side surface 352e of the flange portion 352c.
- the tip surface of the protrusion 352f comes into contact with the side surface 90c on the left side in the axial direction of the slide valve body 90, thereby causing the slide valve. Since the side surface 90c on the left side in the axial direction of the body 90 and the side surface 352e of the flange portion 352c of the pressure sensitive valve member 352 are prevented from coming into contact with each other, the slide valve body 90 can be easily separated from the pressure sensitive valve member 352. The responsiveness of the slide valve body 90 can be enhanced.
- the capacity control valve according to the fourth embodiment will be described with reference to FIG. It should be noted that the description of the same configuration as that of the first, second, and third embodiments and the overlapping configuration will be omitted.
- the slide valve body 90 is opened on the axial right side of the slide valve body 90 on the inner peripheral surface 10d of the valve housing 10 in the pressure sensitive chamber 40.
- An annular stopper 400 that regulates movement in the direction, that is, to the right in the axial direction is fixed.
- the stoppers 400 are not limited to those formed in an annular shape, and a plurality of stoppers 400 may be equally arranged in the circumferential direction. Further, the stopper may be fixed to the outer peripheral surface 52g of the base portion 52b of the pressure sensitive valve member 52.
- the stopper 400 can specify the amount of movement of the slide valve body 90 to the right in the axial direction when the valve is opened, the controllability of the slide valve body 90 is high.
- the slide valve body has been described as reciprocating in the axial direction relative to the pressure-sensitive valve member, but the present invention is not limited to this, for example, while rotating and sliding with respect to the pressure-sensitive valve member. It may reciprocate relatively in the axial direction.
- the thickness dimension L1 of the slide valve body has been described as being configured to be larger (L1> R1) than the diameter R1 of the through hole of the pressure sensitive valve member, but the present invention is not limited to this.
- main / sub valve body and the pressure sensitive valve member are configured as separate bodies, but both may be integrally formed.
- slide valve body may be divided into a plurality of parts in the circumferential direction.
- the inner peripheral surface of the slide valve body is described as sliding with the outer peripheral surface of the base of the pressure sensitive valve member, but the present invention is not limited to this, and the outer peripheral surface of the slide valve body is inside the valve housing 10. It may slide on the peripheral surface 10d.
- the minute gap formed between the outer peripheral surface of the slide valve body and the inner peripheral surface 10d of the valve housing 10 is between the inner peripheral surface of the slide valve body and the outer peripheral surface of the base of the pressure sensitive valve member. It is preferably formed smaller than the minute gaps formed between them.
- the slide valve body is made of a material different from that of the valve housing.
- the base portion and the flange portion may be formed separately.
- the sub-valve 54 does not have to be provided, and the step portion 51b on the right side in the axial direction of the main sub-valve body 51 may function as a support member that receives an axial load, and does not necessarily need a sealing function.
- the pressure sensitive chamber 40 may be provided on the axial right side of the main valve chamber 20 in which the solenoid 80 is provided, and the auxiliary valve chamber 30 may be provided on the axial left side of the main valve chamber 20.
- the pressure sensitive body 60 may not use a coil spring inside.
- the opening degree and opening time of the main valve 50 are adjusted to control the flow rate of the fluid from the Pd port 12 to the Pc port 14, and the slide valve body moves to the left in the axial direction.
- the amount may be adjusted so that the opening degree of the through hole 52d of the pressure sensitive valve member 52 may be adjusted by the slide valve body. According to this, the flow rate of the fluid flowing from the Pc port 14 to the Ps port 13 can be adjusted.
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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弁体、および前記吐出ポートと前記制御ポートとの間に設けられ前記弁体が接触可能な主弁座により構成される主弁と、
感圧室に配置される感圧体と、
前記弁体から前記感圧室に延び前記感圧体と共に感圧弁を構成する感圧弁部材とを備え、
前記弁体と前記感圧弁部材とに中間連通路が形成されており、前記感圧弁の開閉により前記制御ポートと前記吸入ポートとを前記中間連通路により連通させることが可能な容量制御弁であって、
前記感圧弁部材には、前記中間連通路に連通する貫通孔が形成されているとともに、前記感圧室内において前記感圧弁部材に対して相対的にスライドし前記貫通孔を開閉するスライド弁体が設けられ、
前記スライド弁体は、前記感圧室を前記吐出ポート側のPd側空間と前記制御ポート側のPc側空間に区画するものであり、該スライド弁体にはこれら2つの空間を連通するPd-Pc流路が形成されている。
これによれば、スライド弁体により感圧室を吐出ポートと連通するPd側空間と、制御ポートと連通するPc側空間とに区画し、通電状態で主弁を制御する際においては、主弁の開放により吐出ポートから制御ポートへ流れる流体の流れをスライド弁体に形成される開口・切欠等のPd-Pc流路を通して供給可能とするとともに、当該流体の力を利用してスライド弁体を制御ポート側にスライドさせて感圧弁部材の貫通孔を閉塞し制御ポートと吸入ポートを遮断させることにより、制御ポートから吸入ポートへの流体の流れ込みを防ぐことができる。一方、起動時に主弁が閉じた際においては、容量制御弁の外部から制御ポートを通して感圧室のPc側空間に高圧の流体が流れ込むことによってPd側空間とPc側空間との間に生じる差圧を利用してスライド弁体を吐出ポート側にスライドさせて感圧弁部材の貫通孔を開放し制御ポートと吸入ポートを連通させることにより、制御圧力を素早く下げることができる。このようにして、容量可変型圧縮機の起動時の液冷媒の排出および運転効率を高めることができる。
これによれば、感圧弁部材に沿って摺動するため、貫通孔を確実に閉塞することができる。
これによれば、連通孔の数や大きさに応じてスライド弁体のPd-Pc流路を通した流体の抜け量を調整しやすくなり、スライド弁体の動作精度を高めることができる。
これによれば、スライド弁体が流体による力をバランスよく受けることができるため、スライド弁体を安定して動作させることができる。
これによれば、スライド弁体により感圧弁部材の貫通孔が閉塞された状態において、突起によりスライド弁体の側面と感圧弁部材のフランジ部の側面とが面同士で当接することが防止されるため、スライド弁体を感圧弁部材から離間させやすくなり、スライド弁体の応答性を高めることができる。
これによれば、スライド弁体により感圧弁部材の貫通孔が閉塞された状態において、Pc側空間に向く側面による受圧面積を大きく確保することができるため、スライド弁体を差圧により開方向に動作させやすい。
これによれば、ストッパによりスライド弁体の移動量を規定することができるため、スライド弁体の制御性が高い。
2 吐出室
3 吸入室
4 制御室
10 バルブハウジング
10a 主弁座
10c 環状凸部
11 仕切調整部材
12 Pdポート(吐出ポート)
13 Psポート(吸入ポート)
14 Pcポート(制御ポート)
20 主弁室
30 副弁室
40 感圧室
50 主弁
51 主副弁体(弁体)
51c 貫通孔
52 感圧弁部材
52a 感圧弁座
52b 基部
52c フランジ部
52d 貫通孔
52e 側面
53 感圧弁
54 副弁
55 中間連通路
60 感圧体
70 アダプタ
70a 軸方向右側の端面
80 ソレノイド
90 スライド弁体
90a 貫通孔
90b 連通孔(Pd-Pc流路)
90c 側面
90d 側面
190 スライド弁体
190b 切り欠き(Pd-Pc流路)
290 スライド弁体
290e 突起
352 感圧弁部材
352f 突起
400 ストッパ
M 容量可変型圧縮機
S1 Pd側空間
S2 Pc側空間
V1~V4 容量制御弁
Claims (7)
- 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弁体、および前記吐出ポートと前記制御ポートとの間に設けられ前記弁体が接触可能な主弁座により構成される主弁と、
感圧室に配置される感圧体と、
前記弁体から前記感圧室に延び前記感圧体と共に感圧弁を構成する感圧弁部材とを備え、
前記弁体と前記感圧弁部材とに中間連通路が形成されており、前記感圧弁の開閉により前記制御ポートと前記吸入ポートとを前記中間連通路により連通させることが可能な容量制御弁であって、
前記感圧弁部材には、前記中間連通路に連通する貫通孔が形成されているとともに、前記感圧室内において前記感圧弁部材に対して相対的にスライドし前記貫通孔を開閉するスライド弁体が設けられ、
前記スライド弁体は、前記感圧室を前記吐出ポート側のPd側空間と前記制御ポート側のPc側空間に区画するものであり、該スライド弁体にはこれら2つの空間を連通するPd-Pc流路が形成されている容量制御弁。 - 前記スライド弁体は、前記感圧弁部材の外周面に沿って摺動する請求項1に記載の容量制御弁。
- 前記Pd-Pc流路は、前記スライド弁体を軸方向に貫通する連通孔により形成されている請求項1または2に記載の容量制御弁。
- 前記Pd-Pc流路は、周方向に複数等配されている請求項1ないし3のいずれかに記載の容量制御弁。
- 前記スライド弁体と前記感圧弁部材の前記貫通孔よりも先端側に形成されるフランジ部との間には、突起が設けられている請求項1ないし4のいずれかに記載の容量制御弁。
- 前記スライド弁体には、前記フランジ部に向けて突出する突起が設けられている請求項5に記載の容量制御弁。
- 前記バルブハウジングには、前記スライド弁体の開方向への移動を規制するストッパが設けられている請求項1ないし6のいずれかに記載の容量制御弁。
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KR1020227041702A KR102683753B1 (ko) | 2020-05-25 | 2021-05-24 | 용량 제어 밸브 |
JP2022527015A JP7515996B2 (ja) | 2020-05-25 | 2021-05-24 | 容量制御弁 |
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