WO2022131053A1 - 弁 - Google Patents
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- Publication number
- WO2022131053A1 WO2022131053A1 PCT/JP2021/044726 JP2021044726W WO2022131053A1 WO 2022131053 A1 WO2022131053 A1 WO 2022131053A1 JP 2021044726 W JP2021044726 W JP 2021044726W WO 2022131053 A1 WO2022131053 A1 WO 2022131053A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- valve body
- elastic member
- axial direction
- annular
- Prior art date
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- 239000012530 fluid Substances 0.000 claims abstract description 27
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 description 9
- 238000011109 contamination Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000007769 metal material Substances 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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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
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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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
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
- F16K39/022—Devices for relieving the pressure on the sealing faces for lift valves using balancing surfaces
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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
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
Definitions
- the present invention relates to a valve that variably controls the working fluid, for example, a 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 driven to rotate by an engine, a swash plate that is variably connected to a rotation axis at an inclination angle, and a piston for compression that is connected to the sloping plate.
- the tilt angle of the swash plate By changing the tilt angle of 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 using a capacity control valve as a valve that is opened and closed by the electromagnetic force of a solenoid as a drive source, the suction pressure Ps of the suction chamber that sucks the fluid, and the fluid pressurized by the piston. While utilizing the discharge pressure Pd of the discharge chamber to be discharged and 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 flow path between the discharge port and the control port. Is opened and closed by a valve to adjust the control pressure Pc in the control chamber of the variable capacity compressor.
- some capacity control valves control the flow rate of the fluid flowing from the control port to the suction port.
- the fluid flows to the suction port through a through flow path communicating with the control port in the housing.
- the rod-shaped valve body moves toward the valve seat formed in the valve housing by the urging force of the bellows and can block the through-passage.
- the pressure in the control chamber of the variable capacity compressor is controlled by utilizing the pressure difference from the suction pressure Ps whose pressure is lower than the control pressure Pc.
- a tapered contact portion is formed so that one end of the valve body is tapered, and a wide surface with respect to the valve seat formed on the inner peripheral surface of the valve housing. It is designed to come into contact with and sit down.
- the action of the valve body returning from the open state toward the valve seat is due to the urging force of the bellows, and the returning force of the valve body depending on the urging force of the bellows is small. Therefore, if contamination is caught between the valve body contact portion and the valve seat when the valve is closed, the contamination is not completely crushed and a gap is created between the valve body contact portion and the valve seat. This may cause valve leakage.
- the present invention has been made focusing on such a problem, and an object of the present invention is to provide a valve capable of reducing valve leakage.
- valve of the present invention is used.
- a urging means for urging the valve body in the valve closing direction is provided.
- At least one of the contact portion of the valve body and the valve seat is formed of an elastic member. According to this, even if contamination is caught between the abutting portion of the valve body and the valve seat when the valve is closed, the elastic member is elastically deformed to generate a gap between the abutting portion and the valve seat. Since it can be suppressed, valve leakage can be reduced.
- the contact portion of the valve body or the valve seat that abuts on the contact surface of the elastic member is composed of an annular protrusion.
- the elastic member may be formed to have an elastic modulus smaller than that of the annular protrusion. According to this, even if contamination is caught between the annular protrusion and the contact surface of the elastic member when the valve is closed, the elastic member is surely elastically deformed and the gap between the contact portion and the valve seat is formed. Since the occurrence can be suppressed, valve leakage can be reduced.
- the contact surface may be a surface orthogonal to the driving direction of the valve body. According to this, when the valve is closed, it becomes difficult for the annular protrusion to move relative to the contact surface of the elastic member, so that the sealing performance is improved and the contact surface of the elastic member is prevented from being damaged by the annular protrusion. Therefore, the sealing property can be maintained for a long period of time.
- the valve body or the valve housing is provided with an annular recess.
- the elastic member inserted into the annular recess may be caulked and fixed from at least one of the inside and outside in the radial direction. According to this, it is possible to prevent the elastic member inserted into the annular recess from falling off.
- the elastic member may have a rectangular cross section. According to this, stable elasticity can be exhibited regardless of the position of the annular protrusion on the contact surface of the elastic member.
- the valve body is configured to be detachable from the rod constituting the drive source.
- the rod may be urged in the valve opening direction by the rod urging means. According to this, since the rod is held in contact with and detachable from the valve body while being urged in the valve opening direction, the valve body is not affected by the inertial force of the rod when the valve is closed. It is possible to prevent an excessive load from being applied to the valve seat and the valve seat.
- the urging means may be a compression spring. According to this, the structure on the drive source side of the valve can be simplified, and the contact portion of the valve body can be seated on the valve seat to obtain good sealing performance while the valve body is easily displaced. ..
- FIG. 3 is an enlarged cross-sectional view showing a state in which the CS valve is closed in the capacity control valve of the first embodiment.
- FIG. 3 is an enlarged cross-sectional view showing a state in which the CS valve is opened in the capacity control valve of the first embodiment.
- It is an enlarged cross-sectional view which shows the state that the elastic member elastically deformed at the time of closing a CS valve.
- It is an enlarged sectional view which shows the structure of the capacity control valve of Example 2 which concerns on this invention.
- FIG. 3 is an enlarged cross-sectional view showing a state in which the CS valve is closed in the capacity control valve of the first embodiment.
- FIG. 3 is an enlarged cross-sectional view showing a state in which the CS valve is opened in the capacity control valve of the first embodiment.
- It is an enlarged cross-sectional view which shows the state that the elastic member elastically
- FIG. 3 is an enlarged cross-sectional view showing a state in which the CS valve is closed in the capacity control valve of the third embodiment.
- FIG. 3 is an enlarged cross-sectional view showing a state in which the CS valve is opened in the capacity control valve of the third embodiment. It is a figure which shows the deformation example of an elastic member.
- the capacity control valve according to the first embodiment will be described with reference to FIGS. 1 to 3.
- the left and right sides when viewed from the front side of FIG. 1 will be described as the left and right sides of the capacitance control valve. More specifically, the left side of the paper on which the valve housing 10 is arranged will be described as the left side of the capacity control valve, and the right side of the paper on which the solenoid 80 is arranged will be described as the right side of the capacity control valve.
- the capacity control valve of the present invention is incorporated in a variable capacity compressor (not shown) 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") which is a refrigerant. ..
- a working fluid hereinafter, simply referred to as "fluid" which is a refrigerant. ..
- the capacity control valve controls the discharge amount of the variable capacity compressor and adjusts the air conditioning system to the target cooling capacity.
- variable capacity compressor has a casing including a discharge chamber, a suction chamber, a control chamber, and a plurality of cylinders.
- the variable capacity compressor is provided with a communication passage that directly connects the discharge chamber and the control chamber.
- a fixed orifice 9 for balancing the pressure between the discharge chamber and the control chamber is provided in this communication passage (see FIG. 1).
- variable capacity compressor is provided with a rotating shaft 5, a swash plate 6, and a plurality of pistons 7.
- the rotary shaft 5 is rotationally driven by an engine (not shown) installed outside the casing.
- the swash plate 6 is connected to the rotating shaft so as to be tiltable with respect to the rotating shaft by a hinge mechanism in the control chamber.
- the plurality of pistons 7 are connected to a swash plate and fitted in a reciprocating manner in each cylinder.
- the pressure in the control chamber of the variable capacity compressor M is appropriately controlled by using the control pressure Pc.
- the tilt angle of the swash plate changes continuously.
- the stroke amount of the piston changes, so that the discharge amount of the fluid from the variable capacity compressor is controlled.
- the capacitance control valve V1 of the first embodiment incorporated in the variable capacitance compressor adjusts the current energized to the coil 86 constituting the solenoid 80 as a drive source, and adjusts the current to be energized to the capacitance control valve V1. Controls the opening and closing of the CS valve 50 in the above. As a result, the fluid flowing out from the control chamber to the suction chamber is adjusted, and the control pressure Pc in the control chamber is variably controlled.
- the discharge fluid of the discharge pressure Pd in the discharge chamber is constantly supplied to the control chamber via the fixed orifice 9, and the control pressure Pc in the control chamber can be increased by closing the CS valve 50 in the capacity control valve V1. It has become like.
- the CS valve 50 is composed of a CS valve body 51 as a valve body and a CS valve seat 40a as a valve seat.
- the CS valve seat 40a is formed in an elastic member 40 that is press-fitted and caulked into the annular recess 10a of the valve housing 10.
- the CS valve 50 opens and closes when the contact portion 51a formed at the right end of the CS valve body 51 in the axial direction is brought into contact with and separated from the CS valve seat 40a in the axial direction.
- the capacity control valve V1 is provided in a valve housing 10 made of a metal material, a CS valve body 51 reciprocally arranged in the valve housing 10 in the axial direction, and a valve housing 10. It is mainly composed of a solenoid 80 that is connected and exerts a driving force on the CS valve body 51.
- the CS valve body 51 is made of a metal material or a resin material, and has a recess 51b that opens to the right in the axial direction at the center thereof.
- the rod 52 is arranged through the coil 86 of the solenoid 80.
- the left end portion of the rod 52 in the axial direction is inserted into the recess 51b so as to be contactable and detachable.
- the CS valve body 51 is formed with a communication passage 51c penetrating in the axial direction at a position displaced in the outer diameter direction from the recess 51b.
- the communication passage 51c is formed with a constant cross section.
- a plurality of continuous passages 51c may be provided.
- the CS valve body 51 is formed with an annular protrusion 51d protruding to the right in the axial direction at a position further offset in the outer diameter direction from the communication passage 51c.
- the tip of the annular projection 51d that is, the right end in the axial direction, is an abutting portion 51a that comes into contact with and separates from the CS valve seat 40a in the axial direction.
- the contact portion 51a which is the tip of the annular projection 51d, is R-chamfered inside and outside in the radial direction, and is formed in a cross-sectional shape having a flat portion between the two R chamfers (see FIGS. 2 and 3).
- the cross section may be formed into a substantially curved surface without a flat portion between the two R chamfers, and the C chamfer may be used instead of the R chamfer. Further, chamfering is not essential and may or may not be formed on only one of the inside and outside in the radial direction.
- the valve housing 10 has a Ps port 11 as a port that penetrates in the radial direction and communicates with the suction chamber of the variable capacity compressor, and a Pc as a port that communicates with the control chamber.
- the port 12 is formed.
- the Ps port 11 is formed on the right side in the axial direction with respect to the CS valve seat 40a, that is, in the valve closing direction described later.
- the Pc port 12 is formed on the left side in the axial direction with respect to the CS valve seat 40a, that is, in the valve opening direction described later.
- the first valve chamber 13 is formed by a recess 10b formed to the left in the axial direction with respect to the CS valve seat 40a and opens to the left in the axial direction, and the opening on the left in the axial direction is hermetically closed by the lid member 15. ing.
- a bellows 16 and a coil spring 17 as an urging means for urging the CS valve body 51 to the right in the axial direction, that is, in the valve closing direction are arranged.
- the left end of the bellows 16 is hermetically fixed to the lid member 15, and the right end of the bellows 16 is hermetically fixed to the left end surface of the CS valve body 51 in the axial direction, and a space S1 is formed therein.
- the coil spring 17 is a compression spring and is arranged in the space S1 formed inside the bellows 16.
- the space S1 communicates with the second valve chamber 14 via the communication passage 51c, and the fluid in the second valve chamber 14 flows into the space S1. That is, the bellows 16 separately partitions the space S1 and the first valve chamber 13 in a sealed state when the CS valve 50 is closed.
- valve housing 10 is formed with a recess 10c in which the inner diameter side of the right end in the axial direction is recessed to the left in the axial direction.
- the center post 82 is integrally connected and fixed to the valve housing 10 in a substantially sealed state.
- An open end on the solenoid 80 side of the second valve chamber 14 is formed on the inner diameter side of the bottom surface of the recess 10c of the valve housing 10.
- the elastic member 40 is a ring having a rectangular cross section formed of a material such as rubber or resin having an elastic modulus smaller than that of the annular projection 51d of the CS valve body 51.
- the elastic member 40 is press-fitted into the annular recess 10a recessed to the right in the axial direction at the bottom of the recess 10b constituting the first valve chamber 13 of the valve housing 10 from the left in the axial direction, and the opening of the annular recess 10a. It is crimped and fixed by the caulking pieces 10d (see FIGS. 2 and 3) formed in the radial direction. Further, the exposed portion formed between the caulking pieces 10d inside and outside the radial direction, that is, the contact surface 40s on the left end surface of the elastic member 40 in the axial direction is the CS valve seat 40a. The contact portion 51a at the tip of the annular projection 51d of the CS valve body 51 can be brought into contact with and detached from the contact surface 40s.
- the elastic member 40 and the annular recess 10a before and after press fitting have a rectangular cross section, and have substantially the same size in the radial direction, inside and outside, and in the thickness direction.
- the elastic member 40 before press fitting may be formed to be slightly larger or smaller than the annular recess 10a.
- the contact surface 40s of the elastic member 40 is a surface orthogonal to the driving direction of the CS valve body 51, and the radial width is formed to be larger than the radial width of the annular projection 51d.
- 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 center post 82 to be fixed, a rod 52 inserted through the center post 82 and reciprocating in the axial direction, and an axial left end thereof arranged axially to the left of the CS valve seat 40a, and a rod.
- the CS valve body 51 is press-fitted and fixed to the left end portion in the axial direction of 52, the movable iron core 84 into which the right end portion in the axial direction of the rod 52 is inserted and fixed, and the movable iron core 84 provided on the right side in the axial direction of the movable iron core 84.
- a coil spring 85 as a rod urging means for urging the rod 52 to be inserted / fixed to the left in the axial direction, that is, in the valve opening direction, and an exciting rod wound around the outside of the center post 82 via a bobbin. It is mainly composed of a coil 86.
- the coil spring 85 is a compression spring.
- 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 valve housing 10 is inserted and fixed to the recess 81b in a substantially sealed shape. ..
- the center post 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 an insertion hole 82c through which the rod 52 is inserted is formed, and an axial left end portion of the cylindrical portion 82b. It is provided with an annular flange portion 82d extending in the outer diameter direction from the outer peripheral surface of the steel.
- the center post 82 is inserted and fixed to the recess 81b of the casing 81 in a state where the end surface on the right side in the axial direction of the flange portion 82d is in contact with the bottom surface of the recess 81b of the casing 81 from the left in the axial direction. It is inserted and fixed in a substantially sealed shape with respect to the recess 10c of the valve housing 10. That is, the center post 82 is fixed by sandwiching the flange portion 82d between the bottom surface of the recess 81b of the casing 81 and the bottom surface of the recess 10c of the valve housing 10 from both sides in the axial direction.
- the non-energized state of the capacity control valve V1 will be described.
- the CS valve body 51 is pressed to the right in the axial direction, that is, in the valve closing direction by the urging force of the bellows 16 and the coil spring 17 in the non-energized state.
- the contact portion 51a at the tip of the annular projection 51d of the CS valve body 51 is seated on the CS valve seat 40a formed on the end surface on the left side in the axial direction of the elastic member 40, and the CS valve 50 is closed.
- the effective pressure receiving area A of the bellows 16, the effective pressure receiving area B of the CS valve body 51, and the right direction in the axial direction are positive, and the CS valve body 51 has the urging force (F bell ) of the bellows 16 and the coil spring 17.
- the fluid in the space S1 acts on the axially left end surface of the CS valve body 51
- the fluid in the second valve chamber 14 acts on the axially right end surface of the CS valve body 51. Since the second valve chamber 14 and the space S1 are communicated with each other by the communication passage 51c formed in the CS valve body 51, the second valve chamber 14 on the valve closing direction side with respect to the CS valve body 51 is connected to the space S1.
- the fluid inside that is, the fluid having the suction pressure Ps supplied from the Ps port 11 is flowing in.
- the communication passage 51c is a narrowed through hole, when a slight pressure difference momentarily occurs between the pressure in the space S1 and the pressure in the second valve chamber 14, the fluid in the space S1 Is difficult to move momentarily toward the second valve chamber 14, is held in the space S1, and is easy to maintain the closed state of the CS valve 50.
- the fluid flowing into the space S1 and the second valve chamber 14 is a fluid having the same suction pressure Ps supplied from the Ps port 11.
- the control pressure Pc and the suction pressure Ps act on the CS valve body 51.
- the energized state of the capacitance control valve V1 will be described.
- the electromagnetic force (F sol ) 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 rod .
- F sol > F rod the electromagnetic force generated by applying a current to the solenoid 80 in the energized state, that is, in the normal control, so-called duty control.
- the movable core 84 is pulled to the center post 82 side, that is, to the left side in the axial direction
- the body 51 moves together to the left in the axial direction, that is, in the valve opening direction.
- the contact portion 51a of the CS valve body 51 is separated from the CS valve seat 40a formed on the contact surface 40s of the elastic member 40, and the CS valve 50 is opened. Further, when the solenoid 80 is driven, the movable iron core 84 comes into contact with the center post 82 to the right in the axial direction, so that the CS valve body 51 is further restricted from being further separated from the CS valve seat 40a.
- the capacitance control valve V1 is larger than the control pressure Pc due to the valve opening degree of the CS valve 50 adjusted by the balance between the electromagnetic force of the solenoid 80 and the urging force of the bellows 16, the coil spring 17 and the coil spring 85.
- the pressure in the control chamber of the variable capacity compressor can be controlled by utilizing the pressure difference from the suction pressure Ps having a low pressure.
- the capacitance control valve V1 of the first embodiment is a CS formed on the contact portion 51a at the tip of the annular projection 51d of the CS valve body 51 and the contact surface 40s of the elastic member 40 when the valve is closed. Even if contamination is caught between the valve seat 40a, the elastic member 40 is elastically deformed, so that the generation of a gap between the contact portion 51a of the CS valve body 51 and the CS valve seat 40a can be suppressed. , Valve leakage can be reduced.
- the elastic member 40 is formed to have an elastic modulus, that is, Young's modulus, smaller than that of the annular projection 51d of the CS valve body 51, so that the contact portion 51a of the CS valve body 51 and the elastic member 40 come into contact with each other when the valve is closed. Even if a contamination is caught between the CS valve seat 40a formed on the surface 40s, the elastic member 40 is surely elastically deformed, so that the gap between the contact portion 51a of the CS valve body 51 and the CS valve seat 40a is reached. Can be suppressed. Further, regardless of the presence or absence of contamination, the contact portion 51a at the tip of the annular projection 51d elastically deforms the elastic member 40 and is slightly buried (see FIG. 4), whereby the CS valve 50 is slightly filled. In the closed state, the CS valve body 51 is less likely to move relative to the contact surface 40s of the elastic member 40, so that the sealing performance is improved.
- an elastic modulus that is, Young's modulus
- the annular projection 51d is the contact surface 40s of the elastic member 40 when the valve is closed. Since it is more difficult to move relative to each other, the sealing performance is improved. Further, when the valve is closed, the relative movement of the elastic member 40 of the annular protrusion 51d with respect to the abutting surface 40s is suppressed, so that the abutting surface 40s of the elastic member 40 is suppressed from being damaged by the annular protrusion 51d, and the sealing performance is suppressed. Can be maintained for a long period of time.
- the CS valve body 51 and the rod 52 are held so as to be in contact with each other, and the CS valve body 51 is axially to the left of the CS valve seat 40a via the lid member 15. Since it is supported by the bellows 16 fixed to the valve housing 10, the CS valve body 51 has a structure that is easy to move when the valve is closed. Since the relative movement to the relative movement is suppressed, the sealing performance and durability are guaranteed.
- the tip portion of the annular protrusion 51d is chamfered at the inner and outer corners in the radial direction to form a substantially curved cross section, so that the contact surface 40s of the elastic member 40 is further suppressed from being damaged by the annular protrusion 51d. Has been done.
- the material of the contact part of the valve body and the valve seat is a combination of metals as in the conventional case, not only a gap is likely to be generated due to the biting of contamination, but also the contact part of the valve body and the valve are in a closed state of the valve. Since a gap is likely to occur due to the displacement from the seat, valve leakage is likely to occur.
- the CS valve seat 40a is formed on the contact surface 40s of the elastic member 40.
- valve housing 10 is provided with an annular recess 10a, and the elastic member 40 press-fitted into the annular recess 10a is caulked and fixed by caulking pieces 10d inside and outside the radial direction, so that the elastic member inserted into the annular recess 10a is inserted. It is possible to prevent the 40 from falling off.
- the elastic member 40 is press-fitted into the annular recess 10a or caulked and fixed by the caulking pieces 10d inside and outside in the radial direction to deform the elastic member 40 in the radial direction and move the contact surface 40s to the left in the axial direction.
- the contact portion 51a at the tip of the annular projection 51d may be easily buried in the contact surface 40s of the elastic member 40 when the valve is closed.
- the elastic member 40 has a rectangular cross section, stable elasticity can be exhibited regardless of the position of the contact surface 40s of the elastic member 40 with the annular projection 51d.
- the CS valve body 51 is configured separately from the rod 52 constituting the solenoid 80, and the rod 52 is urged in the valve opening direction by the coil spring 85 so that the CS valve body 51 and the rod 52 can be brought into contact with each other. It is being held.
- the contact portion 51a of the CS valve body 51 is seated on the CS valve seat 40a formed on the contact surface 40s of the elastic member 40, and at the same time, the CS valve body 51 acts on the axially shifting right side of the rod 52. Not affected by the inertial force of. Therefore, an excessive load is not applied to the annular protrusion 51d and the elastic member 40.
- the coil spring 17 arranged inside the bellows 16 is a compression spring, the structure on the solenoid 80 side of the capacitance control valve V1 is simplified, and the CS valve body 51 has a structure in which the axis is easily displaced. A contact portion 51a at the tip of the annular protrusion 51d of the CS valve body 51 can be seated on the CS valve seat 40a to obtain good sealing performance.
- the valve housing 10 may be provided with a caulking piece 10d at least on either the inside or the outside in the radial direction.
- the valve housing has the axial left end of the second valve housing 211 in the axial direction with respect to the axial right end of the first valve housing 210. By being fitted from the right side, it is integrally connected and fixed in a substantially sealed state.
- the first valve housing 210 is formed with a Pc port 12 that communicates with the control chamber of the variable capacity compressor.
- the second valve housing 211 is formed with a Ps port 11 that communicates with the suction chamber of the variable capacity compressor.
- annular recess 211a recessed to the right in the axial direction is formed at the left end of the second valve housing 211 in the axial direction, and the elastic member 240 is press-fitted into the annular recess 211a from the left in the axial direction, and the annular recess 211a is formed. It is caulked and fixed by the caulking piece 211d on the inner diameter side formed in the opening. Further, when the first valve housing 210 and the second valve housing 211 are connected and fixed, the annular convex portion 210a having a rectangular cross section formed at the right end portion in the axial direction of the first valve housing 210 is on the left side in the axial direction of the elastic member 240. By being pressed against the outer diameter side of the end face, the elastic member 240 is held in a state of being sandwiched between the first valve housing 210 and the second valve housing 211.
- a CS valve seat 240a as a valve seat is formed.
- the elastic member 240 is held in a state of being sandwiched between the first valve housing 210 and the second valve housing 211 which are integrally connected and fixed. , It is possible to prevent the elastic member 240 inserted in the annular recess 211a from falling off.
- the elastic member 240 is formed by dividing the valve housing. The processing of the first valve housing 210 and the second valve housing 211 for holding is facilitated.
- the elastic member 240 can be held by the annular convex portion 210a of the first valve housing 210, the caulking piece 211d of the second valve housing 211 does not have to be formed. As a result, only the recess of the annular recess 211a needs to be formed in the second valve housing 211, which further facilitates processing.
- the capacity control valve according to the third embodiment will be described with reference to FIGS. 6 to 8. It should be noted that the description of the same configuration as that of the first embodiment and the overlapping configuration will be omitted.
- the CS valve 50 is a CS valve body 351 as a valve body and a CS valve seat as a valve seat at the tip of an annular projection 310d of the valve housing 310.
- the CS valve seat has a contact portion 340a formed on the contact surface 340s of the elastic member 340 which is formed by 310a and is press-fitted and caulked into the annular recess 351a formed at the right end in the axial direction of the CS valve body 351.
- the CS valve 50 opens and closes by being brought into contact with and separated from the 310a in the axial direction.
- the CS valve body 351 is formed of a metal material, and the CS valve body 51 is an annular shape recessed to the left in the axial direction at a position further offset in the outer diameter direction from the communication passage 351c. A recess 351a is formed.
- the elastic member 340 is press-fitted into the annular recess 351a of the CS valve body 351 from the right in the axial direction, and is formed by a caulking piece 351d (see FIGS. 7 and 8) inside and outside the radial direction formed in the opening of the annular recess 351a. It is fixed by caulking. Further, on the end surface on the right side in the axial direction of the elastic member 340, an exposed portion formed between the caulking pieces 351d inside and outside in the radial direction, that is, the contact portion 340a of the CS valve body 351 is formed by the contact surface 340s. .. The contact portion 340a can be brought into contact with and separated from the CS valve seat 310a at the tip of the annular projection 310d of the valve housing 310.
- the valve housing 310 is formed with an annular protrusion 310d formed at the bottom of the recess 310b constituting the first valve chamber 13 and projecting to the left in the axial direction.
- annular protrusion 310d formed at the tip of the annular projection 310d, that is, at the right end in the axial direction.
- a CS valve seat 310a is formed at which the contact portion 340a of the CS valve body 351 comes into contact with and separates in the axial direction.
- the elastic member 340 is provided on the CS valve body 351 which is a member assembled to the valve housing 310, the CS valve body for holding the elastic member 340 is provided.
- the processing of 351 becomes easy.
- the CS valve body 351 may be provided with a caulking piece 351d at least on either the inside or the outside in the radial direction.
- both the contact portion of the body and the CS valve seat may be composed of elastic members.
- only the annular protrusion may be composed of an elastic member.
- the elastic member on which the contact surface is formed has a smaller elastic modulus than the elastic member constituting the annular protrusion.
- Both the contact portion of the CS valve body and the CS valve seat may be composed of elastic members having the same elastic modulus.
- the contact surface of the elastic member does not have to be a surface orthogonal to the driving direction of the CS valve body, and may be formed as, for example, an inclined surface or a curved surface.
- valve housing and the CS valve body have been described as being made of a metal material or a resin material, but the member in which the elastic member is held by caulking fixing may be made of a metal material. preferable. Further, for example, when the member for holding the elastic member is made of a resin material, a portion serving as a holding piece for preventing the elastic member from falling off may be fleshed out instead of the caulking piece.
- the elastic member has been described as being press-fitted into the annular recess, but the elastic member may be simply inserted into the annular recess. Further, the elastic member is not limited to the one arranged in the annular recess, and may be fixed to the valve housing or the CS valve body by another member such as an adhesive or a bolt.
- the elastic member is not limited to the one having a rectangular cross section, and for example, the cross-sectional shape may be circular, triangular, T-shaped, V-shaped, X-shaped or the like.
- the step portion provided on the elastic member 40'pressed into the annular recess 10a is pressed by the caulking pieces 10d inside and outside in the radial direction. It may be crimped and fixed.
- the CS valve body is described as being composed of a rod penetrating the coil of the solenoid and a separate member and can be contacted and separated, but the present invention is not limited to this, and the CS valve body is not limited to this.
- the rod may be integrally connected and fixed.
- the CS valve body and the rod may be integrally formed. In this case, it is not necessary to provide a coil spring that urges the rod in the valve opening direction.
- the bellows since the bellows has a coil spring arranged inside, the bellows itself does not have to have an urging force.
- the coil spring does not have to be arranged inside the bellows.
- the present invention is not limited to this, and the effective pressure receiving area A is effectively received.
- the area B may be slightly larger (A> B) so that the closed state of the CS valve can be reliably maintained, or the effective pressure receiving area B may be slightly larger than the effective pressure receiving area A (A ⁇ B).
- the CS valve may be easily opened. That is, it is sufficient that the influence of the pressure of the fluid acting on both sides of the CS valve body in the moving direction is small.
- the capacity control valve of the above embodiment has been described by taking a CS valve as an example, but the present invention is not limited to this, and may be a DC valve that opens and closes the flow path between the Pd port and the Pc port.
- the drive source may be something other than a solenoid.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
流体が通過するポートが形成されたバルブハウジングと、
駆動源により駆動される弁体と、
前記弁体の当接部が着座する弁座と、
前記弁体を閉弁方向に付勢する付勢手段と、を備え、
前記弁体の当接部と前記弁座の少なくともいずれか一方が弾性部材により形成されている。
これによれば、閉弁時において弁体の当接部と弁座との間にコンタミが噛み込まれても、弾性部材が弾性変形することにより当接部と弁座との隙間の発生を抑制することができるため、弁漏れを低減することができる。
前記弾性部材は、前記環状突起よりも弾性係数が小さく形成されていてもよい。
これによれば、閉弁時において環状突起と弾性部材の当接面との間にコンタミが噛み込まれても、弾性部材が確実に弾性変形することにより当接部と弁座との隙間の発生を抑制することができるため、弁漏れを低減することができる。
これによれば、閉弁時において環状突起が弾性部材の当接面に対して相対移動し難くなるため、密封性が高められるとともに、環状突起により弾性部材の当接面が傷付けられることを抑制して密封性を長期間に亘って維持することができる。
前記環状凹部に挿入された前記弾性部材が径方向内外の少なくともいずれか一方からかしめ固定されていてもよい。
これによれば、環状凹部に挿入された弾性部材の脱落を防止することができる。
これによれば、環状突起が弾性部材の当接面のどの位置に当接しても安定した弾性を発揮することができる。
前記ロッドは、ロッド付勢手段により開弁方向に付勢されていてもよい。
これによれば、ロッドが開弁方向に付勢された状態で弁体と接離可能に保持されることにより、閉弁時に弁体がロッドの慣性力の影響を受けないため、当接部や弁座に過度な負荷がかかることを防止できる。
これによれば、弁の駆動源側の構造を簡素化し、弁体が軸ずれしやすい構造でありながら、弁体の当接部を弁座に着座させて良好な密封性を得ることができる。
10 バルブハウジング
10a 環状凹部
10d かしめ片
11 Psポート(ポート)
12 Pcポート(ポート)
13 第1弁室
14 第2弁室
15 蓋部材
16 ベローズ(弁体を閉弁方向に付勢する付勢手段)
17 コイルスプリング(弁体を閉弁方向に付勢する付勢手段)
40 弾性部材
40a CS弁座(弁座)
40s 当接面
50 CS弁
51 CS弁体(弁体)
51a 当接部
51d 環状突起
52 ロッド
80 ソレノイド(駆動源)
85 コイルスプリング(ロッド付勢手段)
210 第1バルブハウジング(バルブハウジング)
210a 環状凸部
211 第2バルブハウジング(バルブハウジング)
211a 環状凹部
211d かしめ片
240 弾性部材
240a CS弁座(弁座)
240s 当接面
310 バルブハウジング
310a CS弁座(弁座)
310d 環状突起
340 弾性部材
340a 当接部
340s 当接面
351 CS弁体(弁体)
351a 環状凹部
351d かしめ片
S1 空間
V1,V2,V3 容量制御弁(弁)
Claims (7)
- 流体が通過するポートが形成されたバルブハウジングと、
駆動源により駆動される弁体と、
前記弁体の当接部が着座する弁座と、
前記弁体を閉弁方向に付勢する付勢手段と、を備え、
前記弁体の当接部と前記弁座の少なくともいずれか一方が弾性部材により形成されている弁。 - 前記弾性部材の当接面に当接する前記弁体の当接部または前記弁座は、環状突起により構成され、
前記弾性部材は、前記環状突起よりも弾性係数が小さく形成されている請求項1に記載の弁。 - 前記当接面は、前記弁体の駆動方向と直交する面である請求項2に記載の弁。
- 前記弁体または前記バルブハウジングには、環状凹部が設けられ、
前記環状凹部に挿入された前記弾性部材が径方向内外の少なくともいずれか一方からかしめ固定されている請求項1ないし3のいずれかに記載の弁。 - 前記弾性部材は、断面矩形である請求項1ないし4のいずれかに記載の弁。
- 前記弁体は、前記駆動源を構成するロッドと接離可能に別体に構成され、
前記ロッドは、ロッド付勢手段により開弁方向に付勢されている請求項1ないし5のいずれかに記載の弁。 - 前記付勢手段は、圧縮バネである請求項1ないし6のいずれかに記載の弁。
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JP2022569877A JPWO2022131053A1 (ja) | 2020-12-17 | 2021-12-06 | |
KR1020237020969A KR20230104743A (ko) | 2020-12-17 | 2021-12-06 | 밸브 |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001501290A (ja) * | 1997-04-14 | 2001-01-30 | ビルケルト ベルケ ゲーエムベーハー ウント ツエーオー. | 広範囲弁 |
JP2001263527A (ja) * | 2000-03-17 | 2001-09-26 | Pacific Ind Co Ltd | パイロット式電磁弁 |
JP2013194918A (ja) * | 2012-03-22 | 2013-09-30 | Robert Bosch Gmbh | 改良されたシールシートを備えた比例弁 |
JP2020060108A (ja) * | 2018-10-05 | 2020-04-16 | 株式会社テージーケー | 可変容量圧縮機およびその制御弁 |
WO2020218284A1 (ja) | 2019-04-24 | 2020-10-29 | イーグル工業株式会社 | 容量制御弁 |
-
2021
- 2021-12-06 JP JP2022569877A patent/JPWO2022131053A1/ja active Pending
- 2021-12-06 WO PCT/JP2021/044726 patent/WO2022131053A1/ja active Application Filing
- 2021-12-06 CN CN202180084607.0A patent/CN116635656A/zh active Pending
- 2021-12-06 KR KR1020237020969A patent/KR20230104743A/ko not_active Application Discontinuation
- 2021-12-06 EP EP21906416.9A patent/EP4265949A1/en active Pending
- 2021-12-06 US US18/267,072 patent/US20240011574A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001501290A (ja) * | 1997-04-14 | 2001-01-30 | ビルケルト ベルケ ゲーエムベーハー ウント ツエーオー. | 広範囲弁 |
JP2001263527A (ja) * | 2000-03-17 | 2001-09-26 | Pacific Ind Co Ltd | パイロット式電磁弁 |
JP2013194918A (ja) * | 2012-03-22 | 2013-09-30 | Robert Bosch Gmbh | 改良されたシールシートを備えた比例弁 |
JP2020060108A (ja) * | 2018-10-05 | 2020-04-16 | 株式会社テージーケー | 可変容量圧縮機およびその制御弁 |
WO2020218284A1 (ja) | 2019-04-24 | 2020-10-29 | イーグル工業株式会社 | 容量制御弁 |
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KR20230104743A (ko) | 2023-07-10 |
EP4265949A1 (en) | 2023-10-25 |
JPWO2022131053A1 (ja) | 2022-06-23 |
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