WO2014107998A1 - 阀针组件以及包括该阀针组件的电子膨胀阀 - Google Patents

阀针组件以及包括该阀针组件的电子膨胀阀 Download PDF

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Publication number
WO2014107998A1
WO2014107998A1 PCT/CN2013/088058 CN2013088058W WO2014107998A1 WO 2014107998 A1 WO2014107998 A1 WO 2014107998A1 CN 2013088058 W CN2013088058 W CN 2013088058W WO 2014107998 A1 WO2014107998 A1 WO 2014107998A1
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WO
WIPO (PCT)
Prior art keywords
valve needle
needle assembly
collar
valve
sleeve
Prior art date
Application number
PCT/CN2013/088058
Other languages
English (en)
French (fr)
Inventor
刘敬喜
吕晓
费谷丰
Original Assignee
艾默生环境优化技术(苏州)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201310007329.6A external-priority patent/CN103912689B/zh
Priority claimed from CN2013200085180U external-priority patent/CN203098902U/zh
Application filed by 艾默生环境优化技术(苏州)有限公司 filed Critical 艾默生环境优化技术(苏州)有限公司
Publication of WO2014107998A1 publication Critical patent/WO2014107998A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/36Valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/36Valve members
    • F16K1/38Valve members of conical shape
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644One-way valve
    • F16K31/0655Lift valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a valve needle assembly and an electronic expansion valve including the same, and more particularly to a valve needle assembly having an improvement in assembly and the like, and an electronic expansion valve including the valve needle assembly.
  • Electronic expansion valves are important components in refrigeration/heating systems and are primarily used to regulate the flow of refrigerant fluids.
  • the valve needle is fixedly coupled to the transmission member (e.g., interference crimping), or the valve needle is integrally formed with the transmission member (e.g., injection molded).
  • the valve needle cannot be disassembled and replaced at all, or it cannot be easily and freely removed and replaced as required.
  • a valve needle assembly comprising: a first member coupled to a drive member of a drive mechanism or integral with the transmission member, the first member The drive mechanism receives power to be movable up and down in an axial direction; and a second member, the second member including a valve needle, the second member being detachably coupled to the first member, the second member Capable of moving up and down in the axial direction as the first member moves up and down Move to allow the needle to engage or disengage from the seat.
  • an electronic expansion valve comprising: a drive mechanism; a valve seat; and a valve needle assembly as described above.
  • FIG. 1 is a longitudinal cross-sectional view of a valve needle assembly in accordance with a first embodiment of the present invention
  • FIGS. 2A-2H are perspective views of various components included in a valve needle assembly in accordance with a first embodiment of the present invention.
  • Figure 3 is a longitudinal cross-sectional view of a valve needle assembly in accordance with a second embodiment of the present invention.
  • FIGS. 4A-4D are perspective views of various components included in a valve needle assembly in accordance with a second embodiment of the present invention.
  • Figure 5 is a longitudinal sectional view of a valve needle assembly in accordance with a third embodiment of the present invention.
  • FIGS. 6A-6E are perspective views of various components included in a valve needle assembly in accordance with a third embodiment of the present invention.
  • Figure 7 is a perspective view showing an assembly of a mandrel and a moving iron using a hole dam according to the present invention
  • Figure 8 is a longitudinal sectional view showing an assembly of a mandrel and a moving iron using a hole dam according to the present invention
  • Figures 9A-9C are perspective views of various components included in the assembly of the mandrel and the moving iron;
  • Figure 10 is a perspective view showing an assembly of a sleeve and a valve needle using a hole dam according to the present invention
  • Figure 11 is a perspective view showing an assembly of a mandrel and a bushing using a shaft dam according to the present invention
  • Figure 12 is a longitudinal sectional view showing an assembly of a mandrel and a bushing using a shaft dam according to the present invention
  • 13A to 13C are perspective views of respective components included in an assembly of a mandrel and a bushing
  • Fig. 14 is a perspective view showing a damper in the related art. detailed description
  • FIGS. 2A-2H are perspective views of respective components included in the valve needle assembly according to the first embodiment of the present invention.
  • the valve needle assembly 10 can include a sleeve 20 and a valve needle 30.
  • the sleeve 20 generally includes: a first/upper section (internal threaded portion/anti-rotation portion) 22; and a second/lower section (a valve needle joint) 24.
  • a hole e.g., a through hole is formed in the first section 22 of the sleeve 20, the hole having a circular shape, and an internal thread is formed in the hole.
  • the outer circumference of the first section 22 of the sleeve 20 has an anti-rotation structure (e.g., a non-circular or multi-faceted outer circumference, preferably an octahedral circumference as shown in Figure 2E).
  • the first section 22 of the sleeve 20 is for threaded connection with a corresponding component of the drive mechanism (not shown, for example, the lower end/external end of the spindle of the drive mechanism that rotates integrally with the rotor of the rotary motor) to drive
  • the mechanism receives power so as to be able to translate up and down in the axial direction A with the mandrel of the drive mechanism rotated.
  • the second section 24 of the sleeve 20 is adapted to engage the valve needle 30 such that the valve needle 30 can move up and down in the axial direction A as the sleeve 20 moves up and down.
  • the sleeve 20 is used as the first member according to the present invention.
  • the drive mechanism may further include a solenoid coil and a movable plunger.
  • Electromagnetic drive mechanism In the case of an electromagnetic drive mechanism, the first member (sleeve 20) may be fixedly coupled to a corresponding component of the drive mechanism, such as the lower end of the movable plunger, or may even be integral with the corresponding components of the drive mechanism ( For example, molded into one).
  • the internal thread portion and/or the anti-rotation portion may not be provided at the first member (sleeve 20), and the first member (sleeve 20) may also be entirely A suitable shape other than a substantially cylindrical shape is shown.
  • the first component (sleeve 20) in the case of using an electric drive mechanism
  • the first component (sleeve 20) can also be fixedly connected to a corresponding component of the drive mechanism, such as the lower end of the mandrel, or even integrally formed (eg, molded integrally) with the corresponding components of the drive mechanism.
  • the internal thread portion and/or the anti-rotation portion may not be provided at the first member (sleeve 20), and the first member (sleeve 20) as a whole is also Other suitable shapes than the substantially cylindrical shape may be presented.
  • the second section 24 of the sleeve 20 may include a body portion 241 and a rim portion (male joint portion) 242 disposed at a lower end of the second portion 24.
  • the porch portion 242 is a non-circular rim portion in a radial section (i.e., a section obtained by cutting in a radial direction B perpendicular to the axial direction A).
  • the porch portion 242 is a generally elongate plate-like body and has a lower contact surface 2421 (eg, a flat contact surface), opposing two generally straight sides 2422, and two opposing sides. Arc-shaped side portion 2423.
  • the body portion 241 may have a substantially cylindrical shape.
  • the length of the contour portion 242 in the radial direction i.e., the distance substantially corresponding to the two arc-shaped side portions 2423
  • the width of the contour portion 242 in the radial direction can be greater than (eg, slightly greater than), equal to, or less than (eg, slightly smaller than) the outer diameter of the body portion 241.
  • the axially central portion of the contour portion 242 is hollow, however, it should be noted that the axially central portion of the contour portion 242 may also be solid, that is, the lower contact surface 2421 is completely continuous. Contact surface.
  • the contour portion (male joint portion) 242 is used as the first joint portion according to the present invention.
  • the valve needle 30 generally includes a collar (yin joint) 32, a barrel 34, and a valve needle body 36.
  • the valve needle 30 is used as the second member according to the present invention.
  • an upper accommodating chamber 341 (serving as a collar accommodating chamber according to the present invention) is disposed, and the collar 32 is disposed in the upper accommodating chamber 341.
  • the collar 32 is fixedly coupled to the barrel 34 by an interference fit in the upper receiving cavity 341.
  • a central accommodating chamber 342 is provided at the axially middle portion of the cylinder 34, and the central accommodating chamber 342 is for accommodating a coil spring or the like which will be described later.
  • a step portion 343 is provided between the upper receiving chamber 341 and the middle receiving chamber 342 at the inner peripheral wall of the barrel 34, and the step portion 343 facilitates stable positioning of the collar 32 with respect to the barrel 34.
  • valve needle body 36 is held.
  • a generally annular, convexly projecting flange 344 is provided at the lower end of the barrel 34, and the needle body 36 is retained by the flange 344 to the barrel 34.
  • the collar 32 has a through hole 321 through which the contour portion 242 can be inserted but through the through hole
  • the 321 cannot be rotated or cannot be completely rotated (ie, cannot be rotated 360 degrees).
  • the contour portion 242 can be inserted through the through hole 321 only at a predetermined circumferential angle, that is, when the rim portion 242 is inserted downward in the axial direction and is rotated at an angle after passing through the through hole 321 Next, the contour portion is stopped by the collar 32 and cannot be inserted back through the through hole 321 in the axial direction.
  • the through hole 321 is a through hole having a non-circular radial cross section such that the contour portion 242 and the through hole 321 are when the contour portion 242 is inserted through the through hole 321
  • the guiding clearance fit relationship in other words, the contour portion 242 is substantially incapable of rotating or moving in the radial direction.
  • the through-holes 321 are correspondingly generally through-holes having a generally elongated radial cross section and having two opposing substantially straight sides The inner peripheral wall segment 3212 and the opposite two arcuate inner peripheral wall segments 3213.
  • the collar 32 has a receiving recess 322 at the second end (lower end in FIG. 1), the receiving recess 322 for receiving the porch portion 242 such that the rim portion 242 is stopped It is not possible to move upward in the axial direction, which is opposite to the end of the collar 32 that is initially inserted by the contour portion 242 (the first end, ie the upper end in Figure 1).
  • the receiving groove 322 is a non-circular receiving groove having a radial cross section substantially matching the wheel portion 242 such that the wheel portion 242 and the receiving groove 322 are received when the contour portion 242 is received in the receiving groove 322.
  • the receiving recess 322 is a receiving recess having a substantially elongated radial cross section, substantially matching the contoured portion 242 of the generally elongate plate-like body.
  • the valve needle assembly can be made by using a substantially matched porch portion having a substantially elongated plate-like body, a through hole having a substantially elongated radial cross section, and a accommodating groove having a substantially elongated radial cross section. The assembly and disassembly are smoother, and the contour portion is stably received in the accommodating recess after assembly, thereby making the detachable connection of the first member and the second member of the valve needle assembly more stable.
  • the collar (female joint portion) 32 is used as the second joint portion according to the present invention.
  • the axial centerline of the receiving groove 322 and the axial centerline of the through hole 321 may substantially coincide.
  • the radial longitudinal axis B 1 of the receiving groove 322 is open
  • the radial longitudinal axes B2 of the holes 321 are offset from each other in the circumferential direction, preferably by 90 degrees from each other.
  • the valve needle body 36 includes: a valve needle core 361, a seal 362, and Reinforcing member 363.
  • the needle body 36 can be held at the lower end of the barrel 34 to be movable up and down with respect to the barrel 34 in the axial direction.
  • the valve needle body 36 may also be fixedly coupled to the lower end of the barrel 34.
  • the valve needle assembly 10 can also include a coil spring 40 (serving as a biasing member in accordance with the present invention).
  • the coil spring 40 is housed in the central receiving chamber 342 of the cylinder 34.
  • the coil spring 40 biases the contour portion 242 of the sleeve 20 and thus the entire sleeve 20 upwardly such that the contour portion 242 is pressed against, for example, the receiving recess 322.
  • the coil spring 40 also biases the needle body 36 downward.
  • other suitable elastic members may be used instead of the coil spring 40 to constitute the biasing member.
  • a spacer 50 is disposed between the rim portion 242 and the coil spring 40.
  • the spacer 50 facilitates the coil spring 40 to more gently bias the contour portion 242.
  • a force transmission assembly may be provided between the coil spring 40 and the valve needle body 36. 60.
  • the force transfer assembly 60 is in point contact with the valve needle body 36 (e.g., the stiffener 363 of the valve needle body 36) to effect the valve needle body 36 (specifically, the valve needle core portion 361 of the valve needle body 36) relative to the valve seat (not shown) Self-alignment of the show).
  • the force transfer assembly 60 includes a ball seat 62 and a ball 64.
  • the ball seat 62 is used to hold the ball 64, and the ball 64 is used for point contact with the valve needle body 36.
  • valve needle assembly 10 An exemplary assembly and disassembly process of the valve needle assembly 10 in accordance with the first embodiment of the present invention is described below.
  • the valve needle 30 is rotated relative to, for example, the sleeve 20 that has been coupled to the corresponding component of the drive mechanism to an appropriate circumferential angle (ie, the through hole 321 of the collar 32 of the valve needle 30 and the sleeve 20 are
  • the rim portion 242 of the second section 24 is aligned in the axial direction, and then the through hole 321 is fitted over the contour portion 242 such that the contour portion 242 is inserted through the through hole 321 until the contour portion 242 is inserted into the through hole 321 .
  • the needle 30 is rotated together with the collar 32 by, for example, 90 degrees, so that the receiving groove 322 of the collar 32 of the needle 30 is aligned with the rim portion 242 in the axial direction. Then, the rim portion 242 is pressed against the accommodating recess 322 by, for example, the elastic force of the coil spring 40, thereby completing the assembly.
  • the valve needle 30 is urged upwardly with the collar 32 such that the contoured portion 242 exits the receiving recess 322.
  • the needle 30 is rotated together with the collar 32 by, for example, 90 degrees, so that the through hole 321 of the collar 32 of the needle 30 is aligned with the contour portion 242 in the axial direction.
  • valve needle 30 is pulled downward, thereby completing the disassembly.
  • the valve needle assembly 10 can be appropriately mounted. Dispensing and disassembling, and also enabling the valve needle assembly 10 to operate properly during operation of the electronic expansion valve.
  • the valve needle can be easily and freely removed and replaced as needed by means of any external tool without any external tools, so that it can be used in a single electronic expansion valve.
  • the purpose of adjusting the capacity of the electronic expansion valve is achieved by replacing the valve needles of different specifications, thereby expanding the application range of the electronic expansion valve and enhancing the versatility.
  • FIG. 3 is a longitudinal sectional view of a valve needle assembly according to a second embodiment of the present invention
  • FIGS. 4A-4D are perspective views of respective components included in the valve needle assembly according to the second embodiment of the present invention.
  • the valve needle assembly 10A may include a sleeve 20A and a valve needle 30A.
  • the sleeve 20A generally includes: a first/upper section (internal threaded portion/anti-rotation portion) 22A; a second/lower section (a valve needle joint) 24A; and a collar (female joint) 26A
  • a hole (for example, a through hole) is formed in the first section 22A of 20A, the hole has a circular shape, and an internal thread is formed in the hole.
  • the outer circumference of the first section 22A of the sleeve 20A has an anti-rotation.
  • the structure e.g., non-circular or multi-faceted outer circumference, preferably an octahedral circumference as shown in Figure 4A.
  • the first section 22A of the sleeve 20A is for use with a corresponding component of the drive mechanism (not shown, such as the drive mechanism).
  • the lower end/external thread end of the spindle that rotates integrally with the rotor of the rotary motor is screwed to receive power from the drive mechanism so as to be able to translate up and down in the axial direction A with the spindle of the drive mechanism rotated.
  • Sleeve 20A The second section 24A is for engaging with the valve needle 30A so that the valve needle 30A can move up and down in the axial direction A as the sleeve 20A moves up and down.
  • Sleeve 20A is used as the first member according to the present invention.
  • a lower accommodating chamber 28A (serving as a collar accommodating chamber according to the present invention) is disposed, and a collar 26A is disposed in the lower accommodating chamber 28A.
  • the collar 26A is fixedly coupled to the second section 24A by an interference fit in the lower receiving cavity 28A.
  • a central accommodating chamber 29A is provided at an axially central portion of the sleeve 20A, for example, for accommodating a coil spring which will be described later.
  • a step portion 243A is provided between the lower receiving chamber 28A and the middle receiving chamber 29A at the inner peripheral wall of the sleeve 20A.
  • the step 243A facilitates stable positioning of the collar 26A relative to the sleeve 20A, specifically the second section 24A.
  • a step portion 223A for supporting a coil spring to be described later is provided at the inner peripheral wall of the first section 22A of the sleeve 20A.
  • the structure of the collar 26A is similar to that of the collar 32 of the first embodiment.
  • the collar 26A has a through hole 261A.
  • the through hole 261A is a through hole having a non-circular radial cross section.
  • the through hole 261 A is a through hole having a substantially elongated radial cross section, and has two opposite substantially flat inner peripheral wall segments 2612A and two opposite arcuate inner peripheral wall segments 2613A.
  • the collar 26A has a receiving recess 262A at a first end (upper end in Fig. 3) for receiving a rim portion of the valve needle 30A which will be described later.
  • the accommodating recess 262A is a accommodating recess having a non-circular radial cross section. More preferably, the receiving groove 262A is a receiving groove having a substantially elongated radial cross section.
  • the collar (female joint) 26A is used as the first joint portion according to the present invention.
  • the valve needle 30A generally includes a valve needle body 36A.
  • the valve needle 30A is used as the second member according to the present invention.
  • a contour portion (male joint portion) 365A is provided at the upper end of the needle body 36A.
  • the structure of the contour portion 365A is similar to that of the wheel house portion 242 in the first embodiment.
  • the contour portion 365A is a contour portion having a non-circular radial cross section.
  • the contour portion 365A is a generally elongate plate-like body and has an upper contact surface 3651A (eg, a flat contact surface), opposing two generally straight sides 3652A, and two opposing circles. Curved side 3653A.
  • the length of the contour portion 365A in the radial direction (i.e., the distance substantially corresponding to the two arc-shaped side portions 3653A) is larger than the outer diameter of the upper end portion of the valve needle body 36A, and the radial direction of the contour portion 365A
  • the width of the direction i.e., substantially corresponding to the distance between the generally straight sides 3652A
  • the contour portion (male joint portion) 365A is used as the second joint portion according to the present invention.
  • the valve needle assembly 10A may also include a coil spring 40A (used as a biasing member in accordance with the present invention).
  • the coil spring 40A is housed in the central accommodating chamber 29A of the sleeve 20A.
  • the assembly and disassembly process of the valve needle assembly 10A according to the second embodiment of the present invention is substantially similar to the assembly and disassembly process of the valve needle assembly 10 according to the first embodiment of the present invention.
  • the valve needle can be easily and freely removed and replaced as needed by means of any external tool without any external tools, so that it can be used in a single electron
  • the purpose of adjusting the capacity of the electronic expansion valve is achieved by replacing the valve needle of different specifications, thereby expanding the application range of the electronic expansion valve and enhancing the versatility.
  • FIGS. 6A to 6E are perspective views of respective components included in the valve needle assembly according to the third embodiment of the present invention.
  • the valve needle assembly 10B may include a sleeve 20B and a valve needle 30B.
  • the sleeve 20B generally includes: a first/upper section (internal threaded portion/anti-rotation portion) 22B; and a second/lower section (a valve needle joint) 24B.
  • a hole e.g., a through hole is formed in the first section 22B of the sleeve 20B, the hole having a circular shape, and an internal thread is formed in the hole.
  • the outer circumference of the first section 22B of the sleeve 20B has an anti-rotation structure (e.g., a non-circular or multi-faceted outer circumference, preferably an octahedral circumference).
  • the first section 22B of the sleeve 20B is for threaded connection with a corresponding component of the drive mechanism (not shown, for example, the lower end/external end of the spindle of the drive mechanism that rotates integrally with the rotor of the rotary motor) to drive
  • the mechanism receives power so as to be able to translate up and down in the axial direction A with the mandrel of the drive mechanism rotated.
  • the second section 24B of the sleeve 20B is for engagement with the valve needle 30B such that the valve needle 30B can be moved up and down in the axial direction A as the sleeve 20B moves up and down.
  • the sleeve 20B is used as the first member according to the present invention.
  • a lower accommodating chamber 28B is provided, and a part of the valve needle 30A is disposed in the lower accommodating chamber 28B.
  • a central accommodating chamber 29B is provided at the axially middle portion of the sleeve 20B, and the central accommodating chamber 29B is used, for example, to accommodate a coil spring which will be described later.
  • a step portion 25B for supporting a coil spring which will be described later is provided at the inner peripheral wall of the sleeve 20B.
  • a groove 27B is provided at the inner peripheral wall of the lower end of the second section 24B for accommodating the dam as will be described later.
  • the groove 27B is used as the first joint portion according to the present invention.
  • the valve needle 30B generally includes a valve needle core portion 361B, a seal member 362B, and a reinforcing member 363B.
  • the valve needle 30B is used as the second member according to the present invention.
  • a flange 3621B (which serves as an abutment portion according to the present invention) which protrudes outward in the radial direction is formed at the seal member 362B.
  • other components/portions of the valve needle 30B may also be used to abut the dam as will be described below to constitute An abutment according to the invention.
  • a flange 3631B that protrudes outward in the radial direction is formed at the reinforcing member 363B.
  • the flange 3621B (or the flange 3621B and the flange 3631B) is used to abut against the dam as will be described later, or to abut against the lining ring to be indirectly supported by the dam.
  • the flange 3621B (or the flange 3621B and the flange 3631B) is used as the second joint portion according to the present invention.
  • valve needle may be of any other suitable type, such as the valve needle of the third embodiment.
  • the flange serving as the second engaging portion may be the meandering side portion 2423 of the contour portion 365A as described in the second embodiment, or may be in the radial direction from the valve needle body 36A. Any other suitable flange that projects outward.
  • the valve needle assembly 10B includes a dam 90B (serving as an intermediate member in accordance with the present invention).
  • the groove 27B (first joint portion) of the sleeve 20B (first member) and the flange 3621B (second joint portion) of the valve needle 30B (second member) are detachable by means of the dam 90B Ground connection.
  • the dam 90B may include a body portion 901B that is substantially annular and a grip portion 902B that protrudes from the body portion 901B.
  • the damper 90B can be implemented as an elastic member. Specifically, the body portion 901B of at least the damper 90B has elasticity to be elastically deformable.
  • the dam 90B is detachably disposed in the groove 27B such that the body portion 901B of the dam 90B is partially embedded in the groove 27B, and the other portion of the body portion 901B of the dam 90B is protruded with respect to the groove 27B.
  • the flange 3621B of the valve needle 30B can be stopped directly or indirectly to stop the entire valve needle 30B.
  • the grip portion 902B is formed as a pair and protrudes inwardly from the body portion 901B of the dam 90B substantially in the radial direction (for example, slightly convex) and then protrudes in the axial direction. Due to such a configuration, it is possible to prevent the grip portion from interfering with other members while also ensuring that the grip portion can be easily accessed in space.
  • the body portion 901B can be elastically deformed to reduce the diameter of the ring body of the substantially annular body portion 901B to be easily detached from the groove 27B, for example.
  • the dam 90B is configured such that, in the natural state of the dam 90B, the diameter of the ring body of the body portion 901B of the dam 90B is suitably larger (preferably slightly larger) than the ring of the groove 27B.
  • the diameter of the body ie, the imaginary ring formed by the groove 27B.
  • the valve needle assembly 10B further includes a backing ring 95B (used as an additional intermediate member in accordance with the present invention).
  • the backing ring 95B can have a small clearance fit on the outside with the second section 24B of the sleeve 20B, and the backing ring 95B can surround the corresponding portion of the valve needle 30B on the inside with a small clearance fit (the corresponding portion is located below the flange 3621B) .
  • the backing ring 95B is disposed between the body portion 901B of the damper 90B and the flange 3621B of the valve needle 30B such that a portion of the backing ring 95B (eg, the inner upper portion) abuts the flange 3621B and a portion of the backing ring 95B (eg, The outer lower portion is in contact with the body portion 901B of the dam 90B.
  • a portion of the backing ring 95B eg, the inner upper portion
  • a portion of the backing ring 95B eg, The outer lower portion is in contact with the body portion 901B of the dam 90B.
  • the valve needle assembly 10B may also include a coil spring 40B (used as a biasing member in accordance with the present invention).
  • the coil spring 40B is housed in the central accommodating chamber 29B of the sleeve 20B.
  • the coil spring 40B is supported by the step portion 25B and biases the valve needle 30B downward.
  • valve needle assembly 10B in accordance with the third embodiment of the present invention is described below.
  • the valve needle 30B is inserted into the lower receiving chamber 28B of the sleeve 20B.
  • the backing ring 95B is inserted into the lower receiving chamber 28B of the sleeve 20B, whereby the backing ring 95B is on the outside with a small clearance fit and on the inside of the second section 24B of the sleeve 20B Around the corresponding portion of the valve needle 30B.
  • the grip portion 902B of the damper 90B is nip, and the body portion 901B of the dam 90B is fitted in the groove 27B in a state where the diameter of the ring body of the body portion 901B is reduced.
  • the portion of the main body portion 901B that protrudes with respect to the groove 27B abuts against the flange 3621B of the valve needle 30B or abuts against the backing ring 95B to indirectly support the flange 3621B via the backing ring 95B, thereby completing the assembly. .
  • the grip portion 902B is directly pressed by hand to detach the dam 90B from the groove 27B in a state where the diameter of the ring body of the body portion 901B is reduced. Then, the valve needle 30B is detached from the sleeve 20B, thereby completing the disassembly.
  • the valve needle 30B is inserted into the sleeve When the lower portion of the 20B is accommodated in the chamber 28B, the valve needle 30B is urged against the elastic force of the coil spring 40B, and after the assembly is completed, the valve needle 30B receives the downward elastic force of the coil spring 40B.
  • the assembly of the valve needle 30B relative to the sleeve 20B can be more stable. Then, it should be noted that even in the case where the biasing member such as the coil spring 40 is not provided, the assembly and disassembly of the valve needle assembly 10B can be appropriately performed, and the valve needle assembly 10B can also be in the electronic expansion valve. Operate properly during work.
  • a groove (a groove opening outward in the radial direction) may be formed at the outer circumference of the valve needle 30B, and a flange (a flange projecting inward in the radial direction) may be formed at the sleeve 20B.
  • the dam can be configured such that: in the natural state of the dam, the diameter of the ring of the body portion of the dam is suitably smaller (preferably slightly smaller than) the groove of the groove (ie, the groove is formed) The diameter of the imaginary ring).
  • the dam body portion can apply a proper elastic force to the groove in the radially inward direction, thereby making the dam body portion more stably accommodated in the groove.
  • the valve needle is further fitted in the sleeve more stably.
  • the grip portions may be formed in a pair and protrude outward (e.g., slightly convex) from the body portion of the dam substantially in the radial direction and then protrude in the axial direction.
  • the body portion can be elastically deformed to increase the diameter of the ring body of the substantially annular body portion to, for example, easily detach from the groove.
  • the free removal and replacement of the valve needle assembly can likewise be achieved.
  • valve needle can be easily and freely removed and replaced as needed by means of any external tool without any external tools, so that The purpose of adjusting the capacity of the electronic expansion valve is achieved by replacing the valve needles of different specifications in a single electronic expansion valve, thereby expanding the application range of the electronic expansion valve and enhancing versatility.
  • the dam is a so-called non-standard or self-made or profiled damper made of, for example, steel wire. Therefore, the detachable (flexible or rigid) axial connection structure according to the third embodiment of the present invention can eliminate the vibration environment as compared with the "thread plus shoulder" scheme of the related art for achieving the axial connection. Loose, low reliability, high cost, narrow application range and other shortcomings.
  • the "standard dam see FIG. 14, FIG.
  • FIG. 14 is a perspective view showing the dam in the related art)" method for preventing axial traverse in the related art, according to the present invention.
  • the detachable axial connection structure of the three embodiments can be used, for example, in the case of a relatively small radial space, which can eliminate or reduce the amount of axial nominal clearance present in the "standard dam” scheme, in assembly and Eliminate the need for special tools for assembly and disassembly Single, versatility is improved, its structure is simple, and the associated costs are reduced.
  • the dam according to the third embodiment of the present invention (the non-standard dam for the hole) and the dam according to the modification (the non-standard yoke for the shaft) are designed to be non-standard according to the specific situation, Various non-standard shackles can be designed to meet the actual assembly and space requirements, and the versatility is greatly enhanced.
  • an electronic expansion valve which may include a drive mechanism, a valve seat, and a valve needle assembly as described above.
  • the first member (sleeve) of the valve needle assembly can be coupled to a corresponding member of the drive mechanism to receive power from the drive mechanism to move up and down in the axial direction.
  • the second member (the valve needle) of the valve needle assembly detachably coupled to the first member may move up and down in the axial direction as the second member moves up and down to adjust the refrigerant fluid flowing through the electronic expansion valve. Flow, and can engage the valve seat to close the electronic expansion valve.
  • FIG. 7 is a perspective view showing an assembly of a mandrel and a moving iron using the hole dam according to the present invention
  • FIG. 8 is a view showing assembly of a mandrel and a moving iron using the hole dam according to the present invention
  • 9A-9C is a perspective view of various components included in the assembly of the mandrel and the moving iron
  • FIG. 10 is an assembly showing the sleeve and the valve needle using the hole damper according to the present invention. Stereogram.
  • the dam 90B can be used to detachably connect the mandrel 70B (used as a male connector according to another aspect of the invention) and the moving iron 80B (used as another according to the present invention).
  • the female connector Specifically, a flange (serving as an abutment portion according to the present invention) or a bushing 72B fixedly coupled to the upper end of the mandrel 70B, for example, in the axial direction, is provided at the upper end of the mandrel 70B (used as an accommodating according to the present invention) Connection). Further, a lower accommodating chamber 82B is provided at the lower end of the moving iron 80B for accommodating the upper end of the mandrel 70B.
  • a groove 84B is provided at the inner peripheral wall of the lower end.
  • the axial stop mechanism according to the present invention is constituted by the damper 90B, the flange of the mandrel 70B or the bushing 72B provided to the mandrel 70B, and the groove 84B of the moving iron 80B.
  • a step portion 86B is provided at the inner peripheral wall of the lower end of the moving iron 80B above the groove 84B, and the step portion 86B is used to abut against the flange of the mandrel 70B or the bushing 72B provided on the mandrel 70B.
  • the mandrel 70B and the moving iron 80B are more stably assembled or the relative movement of the mandrel 70B and the moving iron 80B in the axial direction up and down can be restricted.
  • the dam 50B may be used to detachably connect the sleeve 20B (used as a female connector according to another aspect of the present invention).
  • valve needle 30B (used as a male connector according to another aspect of the present invention).
  • the other axial stop mechanism according to the present invention is constituted by the damper 50B, the groove 27B of the sleeve 20B, and the flange 3621B of the valve needle 30B.
  • FIG. 11 is a perspective view showing an assembly of a mandrel and a bushing using a shaft dam according to the present invention
  • FIG. 12 is a view showing assembly of a mandrel and a bushing using the shaft dam according to the present invention.
  • a longitudinal cross-sectional view of the body, and Figures 13A-13C are perspective views of various components included in the assembly of the mandrel and the bushing.
  • the shaft retainer 90C can be used to removably connect the mandrel 70C (used as a male connector according to another aspect of the invention) and the bushing 72C (used in accordance with the present invention).
  • the female connector On the other hand the female connector).
  • a groove 74C is provided at the outer periphery of the upper end of the mandrel 70C.
  • the other axial stop mechanism according to the present invention is constituted by the dam 90C, the groove 74C of the mandrel 70C, and the bushing 72C.
  • a step portion 76C is provided below the groove 74C, and the step portion 76C is for abutting against the bushing 72C, thereby making the mandrel 70C and the bushing 72C more stable.
  • the ground assembly or the relative movement of the mandrel 70C and the bushing 72C in the axial direction up and down can be restricted.
  • the dam 90C may include a substantially annular elastic body portion 901C and a pair of grip portions 902C each extending from a respective end of the elastic body portion.
  • the grip portion 902C extends outwardly from the distal end of the elastic body portion 901C in a substantially radial direction and then extends in the axial direction. Due to such a configuration, it is possible to prevent the grip portion from interfering with other members while also ensuring that the grip portion can be easily accessed in space.
  • an electronic expansion valve which may include one or more dampers as described above, or one or more axial stop mechanisms.
  • a valve needle assembly comprising: a first member connected to a transmission member of a drive mechanism or integrated with the transmission member, a member receives power from the drive mechanism to be movable up and down in an axial direction; and a second member, the second member including a valve needle, the second member being detachably coupled to the first member, The second member is capable of following the axis along with the up and down movement of the first member Move up and down in the direction to allow the needle to engage or disengage from the seat.
  • the first member has a first portion
  • the second member has a second engaging portion
  • the first engaging portion is one of a contour portion and a collar
  • the second engaging portion is another one of a collar and a contour portion One
  • the collar has a through hole such that the rim portion can be inserted through the through hole from the first end side of the collar when assembled, but the insertion portion is inserted in the contour portion
  • the contour portion is stopped by the collar and cannot be moved back in the axial direction.
  • the radial portion of the rim portion is non-circular, and the through hole is a non-circular through hole substantially matching the contour portion.
  • the rim portion has a substantially elongated plate-like body and has a contact surface, two opposite substantially straight sides, and two opposite sides a circular arc-shaped side portion, and the through hole is correspondingly a through hole having a substantially elongated radial cross section, and has two opposite substantially straight inner peripheral wall segments and two opposite arcuate inner portions Week wall section.
  • the collar is provided with a receiving groove at a second end side opposite to the first end side, the receiving groove being used for The contour portion is accommodated such that the contour portion is stopped and cannot be moved back in the axial direction.
  • the accommodating recess is a non-negative accommodating recess substantially matching the contour portion.
  • the accommodating recess is a accommodating recess having a substantially elongated radial cross section substantially matching the contour portion.
  • the through hole is a through hole having a substantially elongated radial cross section substantially matching the contour portion, and an axial direction of the receiving groove
  • the centerline substantially coincides with an axial centerline of the through hole, and a radial longitudinal axis of the receiving groove and a radial longitudinal axis of the through hole are circumferentially offset from each other.
  • the radial longitudinal axis of the accommodating recess and the radially longitudinal axis of the through hole are mutually offset by 90 degrees in the circumferential direction.
  • the valve needle assembly is further included a biasing member disposed between the first member and the second member to bias the first in a direction separating the first member from the second member a member and the second member.
  • the first portion is the contour portion provided at a lower end of the first member
  • the second joint portion is disposed at a collar at an upper end of the second member
  • the second member further includes a barrel and a valve needle body connected at a lower end of the barrel, and a sleeve is disposed at an upper end of the barrel A ring receiving cavity, the collar being received in the collar receiving cavity.
  • the collar is accommodated in the collar accommodating chamber in an interference fit manner.
  • a central receiving chamber is provided in the cylindrical body, and the valve needle assembly further includes a biasing member, and the biasing member is accommodated in The central receiving chamber is configured to bias the rim portion upwardly to abut the contour portion against the collar.
  • the valve needle assembly further includes a spacer disposed between the contour portion and the biasing member.
  • valve needle body is coupled to be movable up and down with respect to the cylindrical body in an axial direction
  • valve needle assembly further includes a setting A force transmitting assembly between the biasing member and the valve needle body, the force transmitting assembly in point contact with the valve needle body to effect self-centering of the valve needle relative to the valve seat.
  • the biasing member is a coil spring.
  • the first portion is the collar provided at a lower end of the first member
  • the second joint portion is a rim portion disposed at an upper end of the second member
  • the first member is a sleeve
  • a collar accommodating cavity is disposed at a lower end of the sleeve, the collar being received in the sleeve The collar is received in the cavity.
  • the collar is accommodated in the collar accommodating chamber in an interference fit manner.
  • a central receiving chamber is provided in the sleeve, and the valve needle assembly further includes a biasing member, and the biasing member is accommodated in The central receiving chamber is configured to bias the rim portion downwardly to abut the contour portion against the collar.
  • the biasing member is a coil spring.
  • the first engaging portion is one of a groove and an abutting portion and is disposed at a lower end of the first member
  • the second engaging portion is the other of the abutting portion and the groove
  • the valve needle assembly further includes an intermediate member, the first engaging portion and the second engaging portion being detachable by the intermediate member Ground connection.
  • the intermediate member is an elastic dam
  • the elastic dam is detachably disposed in the groove such that the elastic block A portion of the weir is embedded in the groove, and another portion of the elastic dam protrudes from the groove to be able to stop the beat.
  • the elastic dam in the valve needle assembly described above, includes a substantially annular body portion and a grip portion extending from the body portion
  • the first member is a sleeve
  • the first engaging portion is a portion provided at an inner peripheral wall of a lower end of the sleeve a groove
  • the second joint portion is the abutment portion provided at the second member
  • the grip portions are provided as a pair, and are respectively substantially radial from an end of the body portion The direction extends inward and then extends in the axial direction.
  • the first member is a sleeve
  • the first engaging portion is the abutment provided at a lower end of the sleeve
  • the second portion is disposed in the direction of the member, and the member is extended in the direction.
  • the valve needle assembly further includes a backing ring, and the backing ring is disposed between the elastic dam and the abutting portion, A portion of the backing ring is capable of abutting the elastic dam and another portion of the backing ring is capable of abutting the abutment.
  • the abutting portion is a flange that protrudes outward in the radial direction or protrudes inward in the radial direction.
  • the flange is a flange that protrudes outward in the radial direction or protrudes inward in the radial direction.
  • an electronic expansion valve comprising: a drive mechanism; a valve seat; and a valve needle assembly as described above.
  • the drive mechanism is an electromagnetic drive mechanism
  • the electromagnetic drive mechanism includes an electromagnetic coil and serves as the transmission portion The plunger of the piece.
  • the drive mechanism is an electric drive mechanism
  • the electric drive mechanism includes a motor and a spindle, and the spindle is configured to The rotor of the motor rotates integrally, and the mandrel serves as the transmission member.
  • the first member is fixedly coupled to the mandrel or screwed.
  • the first member is a sleeve
  • the sleeve is provided with an anti-rotation structure at an outer circumference, and is disposed in the sleeve
  • An internal threaded portion is threadedly coupled to the externally threaded end of the mandrel.

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  • Lift Valve (AREA)

Abstract

公开了一种阀针组件以及包括该阀针组件的电子膨胀阀。一个方面,该阀针组件包括:第一构件(20,20A,20B),所述第一构件(20,20A,20B)与驱动机构的传动部件连接或者与所述传动部件成一体,所述第一构件(20,20A,20B)从所述驱动机构接收动力从而能够沿轴向方向(A)上下移动;以及第二构件(30,30A,30B),所述第二构件(30,30A,30B)包括阀针,所述第二构件(30,30A,30B)与所述第一构件(20,20A,20B)可拆卸地连接,所述第二构件(30,30A,30B)能够随着所述第一构件(20,20A,20B)的上下运动而沿轴向方向(A)上下移动,使得阀针能够与阀座接合或分离。可以在单个电子膨胀阀中通过更换不同规格的阀针来实现调节电子膨胀阀的容量,由此扩大电子膨胀阀的应用范围并增强通用性。

Description

岡针组件以及包括该阀针组件的电子膨胀阀 相关申请的交叉引用
[01]本申请要求于 2013 年 1 月 8 日提交中国专利局、 申请号为 201310007329.6、 发明名称为 "阀针组件以及包括该阀针组件的电子膨 胀阀" 的中国专利申请以及于 2013年 1月 8提交中国专利局、 申请号 为 201320008518.0、 发明名称为 "阀针组件以及包括该阀针组件的电子 膨胀阀" 的中国专利申请的优先权, 其全部内容通过引用结合在本申请 中。 技术领域
[02]本发明涉及阀针组件以及包括该阀针组件的电子膨胀阀, 更具体 地, 涉及在装配等方面具有改进之处的阀针组件以及包括该阀针组件的 电子膨胀阀。 背景技术
[03]电子膨胀阀是制冷 /制热系统中的重要部件, 主要用于对制冷剂流体的 流量进行调节。 在传统的电子膨胀阀中, 一般地, 阀针与传动部件采用固 定连接(例如过盈压接), 或者阀针与传动部件制成一体(例如注塑成一 体)。 由此, 阀针根本不能够按需求拆卸和更换, 或者不能够方便地和自 由地按需求拆卸和更换。
[04]因此, 对于电子膨胀阀而言, 所期望的是, 实现阀针自由更换(特别 地, 不需要借助任何外部工具), 从而在同一个电子膨胀阀中通过更换不 同 的阀针来实现不同的流量调节能力 , 由此扩大电子膨胀阀的应用范 围并增强通用性。
[05]这里, 应当指出的是, 本部分中所提供的技术内容旨在有助于本领域 技术人员对本发明的理解, 而不一定构成现有技术。 发明内容
[06]根据本发明的一个方面, 提供一种阀针组件, 包括: 第一构件, 所述 第一构件与驱动机构的传动部件连接或者与所述传动部件成一体, 所述第 一构件从所述驱动机构接收动力从而能够沿轴向方向上下移动; 以及第二 构件, 所述第二构件包括阀针, 所述第二构件与所述第一构件可拆卸地连 接, 所述第二构件能够随着所述第一构件的上下运动而沿轴向方向上下移 动, 使得阀针能够与阀座接合或分离。
[07]根据本发明的另一方面, 提供一种电子膨胀阀, 包括: 驱动机构; 阀 座; 以及如上所述的阀针组件。 附图说明
[08]通过以下参照附图的详细描述, 本发明的特征和优点将变得更加容 易理解, 在附图中:
[09]图 1是根据本发明第一实施方式的阀针组件的纵剖视图;
[10]图 2A-2H 是根据本发明第一实施方式的阀针组件所包括的各个部 件的立体图;
[11]图 3是根据本发明第二实施方式的阀针组件的纵剖视图;
[12]图 4A-4D 是根据本发明第二实施方式的阀针组件所包括的各个部 件的立体图;
[13]图 5是根据本发明第三实施方式的阀针组件的纵剖视图;
[14]图 6A-6E是根据本发明第三实施方式的阀针组件所包括的各个部件 的立体图;
[15]图 7是示出使用根据本发明的孔用挡圏的心轴与动铁的组装体的立体 图;
[16]图 8是示出使用根据本发明的孔用挡圏的心轴与动铁的组装体的纵剖 视图;
[17]图 9A-9C是心轴与动铁的组装体所包括的各个部件的立体图;
[18]图 10是示出使用根据本发明的孔用挡圏的套筒与阀针的组装体的立 体图;
[19]图 11 是示出使用根据本发明的轴用挡圏的心轴与轴衬的组装体的立 体图;
[20]图 12是示出使用根据本发明的轴用挡圏的心轴与轴衬的组装体的纵 剖视图; [21]图 13A-13C是心轴与轴衬的组装体所包括的各个部件的立体图; 以及 [22]图 14是示出相关技术中的挡圏的立体图。 具体实施方式
[23]下面参照附图、 借助示例性实施方式对本发明进行详细描述。 对本 发明的以下详细描述仅仅是出于示范目的, 而绝不是对本发明及其应用 或用途的限制。
[24]首先,参照图 1和图 2A-2H描述根据本发明第一实施方式的阀针组 件 10。 其中, 图 1是根据本发明第一实施方式的阀针组件的纵剖视图, 而图 2A-2H 是根据本发明第一实施方式的阀针组件所包括的各个部件 的立体图。
[25]如图 1所示, 阀针组件 10可以包括套筒 20以及阀针 30。 套筒 20 一般包括: 第一 /上部区段(内螺紋部 /防旋转部) 22; 以及第二 /下部区 段(阀针接合部) 24。在套筒 20的第一区段 22中形成有孔(例如通孔), 该孔具有圆形形状, 并且在该孔中形成有内螺纹。 此外, 套筒 20的第 一区段 22的外周具有防旋转结构 (例如非圆形或多面体外周, 优选为 如图 2E所示的八面体外周)。套筒 20的第一区段 22用于与驱动机构的 相应部件(未图示, 例如驱动机构的与旋转马达的转子一体地旋转的心 轴的下端 /外螺紋端) 螺纹连接, 以从驱动机构接收动力, 从而能够在 驱动机构的心轴旋转的情况下沿轴向方向 A上下平移。 套筒 20的第二 区段 24用于与阀针 30接合,使得阀针 30能够随着套筒 20的上下运动 而沿轴向方向 A上下移动。 这里, 需要指出的是, 在第一实施方式中, 套筒 20用作根据本发明的第一构件。
[26]这里, 需要注意的是, 根据本发明, 驱动机构除了可以是包括旋转 马达(例如步进马达)以及心轴的电动式驱动机构之外, 还可以是包括 电磁线圏以及活动柱塞的电磁式驱动机构。在使用电磁式驱动机构的情 况下, 第一构件(套筒 20 )可以与驱动机构的相应部件(例如活动柱塞 的下端)固定地连接, 或者甚至可以与驱动机构的相应部件形成为一体 (例如模制成一体)。 由此, 在使用电磁式驱动机构的情况下, 在第一 构件(套筒 20 )处可以不设置内螺紋部和 /或防旋转部,并且第一构件(套 筒 20 )在整体上也可以呈除了大致圆筒形之外的其它合适的形状。
[27]这里, 还需要注意的是, 根据本发明, 在使用电动式驱动机构的情 况下, 第一构件(套筒 20 )也可以与驱动机构的相应部件(例如心轴的 下端)固定地连接,或者甚至可以与驱动机构的相应部件形成为一体(例 如模制成一体)。 由此, 在使用电动式驱动机构的情况下, 在第一构件 (套筒 20 )处也可以不设置内螺纹部和 /或防旋转部, 并且第一构件(套 筒 20 )在整体上也可以呈除了大致圆筒形之外的其它合适的形状。
[28]套筒 20的第二区段 24可以包括本体部 241以及设置在第二区段 24 的下端处的轮廊部 (阳接合部) 242。 在优选的示例中, 轮廊部 242是 径向截面 (即, 沿垂直于轴向方向 A的径向方向 B剖切所获得的截面) 呈非圆形的轮廊部。在更优选的示例中,轮廊部 242呈大致长形板状体, 并且具有下接触表面 2421 (例如为平坦的接触表面)、 相对的两个大致 平直的侧部 2422以及相对的两个圆弧形的侧部 2423。 本体部 241可以 呈大致圆筒形。 轮廓部 242的沿径向方向的长度(即, 大致对应于两个 圆弧形的侧部 2423之间的距离)大于本体部 241的外径, 而轮廓部 242 的沿径向方向的宽度 (即, 大致对应于大致平直的侧部 2422之间的距 离) 可以大于 (例如略微大于)、 等于或小于 (例如略微小于)本体部 241的外径。 在图示的示例中, 轮廓部 242的轴向中央部是中空的, 然 而, 需要指出的是, 轮廓部 242的轴向中央部也可以是实心的, 亦即, 下接触表面 2421是完全连续的接触表面。 这里, 需要指出的是, 在第 一实施方式中, 轮廓部 (阳接合部) 242用作根据本发明的第一接合部。
[29]阀针 30—般包括: 套环 (阴接合部 ) 32、 筒体 34以及阀针本体 36。 这里, 需要指出的是,在第一实施方式中, 阀针 30用作根据本发明的第二 构件。
[30]在筒体 34的第一端(上端)处设置有上部容纳腔 341 (用作根据本发 明的套环容纳腔), 套环 32布置在上部容纳腔 341中。 在优选的示例中, 套环 32通过过盈配合在上部容纳腔 341中而固定地连接至筒体 34。 在筒 体 34的轴向中部处设置有中部容纳腔 342, 中部容纳腔 342用于容纳下文 将做描述的螺旋弹簧等零部件。 在优选的示例中, 在筒体 34的内周壁处、 在上部容纳腔 341与中部容纳腔 342之间设置有台阶部 343, 台阶部 343 有利于套环 32相对于筒体 34的稳定定位。在筒体 34的第二端(下端)处, 保持有阀针本体 36。 在优选的示例中, 在筒体 34的下端处设置有大致环 形的向向凸出的凸缘 344, 阀针本体 36通过凸缘 344保持于筒体 34。
[31]套环 32具有通孔 321, 轮廓部 242能够插入穿过通孔 321但是在通孔 321中不能够旋转或者不能够完全地旋转 (即, 不能够 360度地旋转)。 换 言之, 只有在预定的周向角度下, 轮廓部 242才能够插入穿过通孔 321, 亦即, 在轮廊部 242沿轴向方向向下插入穿出通孔 321之后以一定角度旋 转的情况下,轮廓部被套环 32止挡而不能够沿轴向方向向上往回插入穿过 通孔 321。 在优选的示例中, 与轮廊部 242大致匹配地, 通孔 321是径向 截面呈非圆形的通孔, 使得当轮廓部 242插入穿过通孔 321时轮廓部 242 与通孔 321是导向间隙配合关系 (换言之, 轮廓部 242基本上不能够旋转 或沿径向方向移动)。 在更优选的示例中, 与呈大致长形板状体的轮廊部 242大致匹配地, 通孔 321相应地是径向截面呈大致长形的通孔, 并且具 有相对的两个大致平直的内周壁段 3212 以及相对的两个圆弧形的内周壁 段 3213。
[32]在一个示例中, 套环 32在第二端(图 1 中的下端)处具有容纳凹槽 322, 容纳凹槽 322用于容纳轮廊部 242, 使得轮廊部 242被止挡而不能够 沿轴向方向向上移动,该第二端与套环 32的被轮廓部 242开始插入的那个 端部(第一端, 即图 1中的上端)相反。 优选地, 容纳凹槽 322是与轮廊 部 242大致匹配的径向截面呈非圆形的容纳凹槽, 使得当轮廓部 242容纳 在容纳凹槽 322中时轮廊部 242与容纳凹槽 322是小间隙配合的关系 (换 言之,轮廓部 242基本上不能够旋转或沿径向方向移动)。 更优选地, 与呈 大致长形板状体的轮廓部 242大致匹配地, 容纳凹槽 322是径向截面呈大 致长形的容纳凹槽。 根据本发明, 由于采用大致匹配的呈大致长形板状体 的轮廊部、 径向截面呈大致长形的通孔以及径向截面呈大致长形的容纳凹 槽, 可以使阀针组件的装配和拆卸更加顺利, 并且在装配之后使轮廓部稳 定地容纳在容纳凹槽中, 从而使阀针组件的第一构件与第二构件的可拆卸 式连接更加稳定。
[33]这里, 需要指出的是, 在第一实施方式中, 套环(阴接合部) 32用 作根据本发明的第二接合部。
[34]容纳凹槽 322 的轴向中心线与通孔 321 的轴向中心线可以大致重 合。在通孔 321是径向截面呈大致长形的通孔而容纳凹槽 322是径向截 面呈大致长形的容纳凹槽的情况下, 容纳凹槽 322的径向纵长轴线 B 1 与通孔 321的径向纵长轴线 B2沿圆周方向相互偏移, 优选为相互偏移 90度。
[35]在图示的示例中, 阀针本体 36包括: 阀针芯部 361、 密封件 362以及 加强件 363。 阀针本体 36可以在筒体 34的下端处被保持成能够相对于筒 体 34沿轴向方向上下移动。 然而, 需要注意的是, 阀针本体 36也可以固 定地连接至筒体 34的下端。
[36]阀针组件 10还可以包括螺旋弹簧 40 (用作根据本发明的偏置部件)。 螺旋弹簧 40容纳在筒体 34的中部容纳腔 342中。 螺旋弹簧 40将套筒 20 的轮廓部 242进而整个套筒 20向上偏置,使得轮廓部 242压靠在例如容纳 凹槽 322中。 另外, 在阀针本体 36与筒体 34以能够相对于彼此沿轴向方 向移动的方式连接的情况下, 螺旋弹簧 40还将阀针本体 36向下偏置。 这 里, 需要注意的是, 可以使用其它合适的弹性元件代替螺旋弹簧 40以构 成偏置部件。
[37]在优选的示例中, 在轮廊部 242与螺旋弹簧 40之间设置有垫片 50。 垫片 50有利于螺旋弹簧 40更加平稳地偏置轮廓部 242。
[38]在阀针本体 36在筒体 34的下端处被保持成能够相对于筒体 34沿轴向 方向上下移动的情况下, 可以在螺旋弹簧 40与阀针本体 36之间设置力传 递组件 60。力传递组件 60与阀针本体 36(例如阀针本体 36的加强件 363 ) 点接触,从而实现阀针本体 36 (具体为阀针本体 36的阀针芯部 361 )相对 于阀座(未图示)的自对中。 在图示的示例中, 力传递组件 60 包括球座 62以及球体 64。 球座 62用于保持球体 64, 而球体 64用于与阀针本体 36 进行点接触。
[39]下面描述根据本发明第一实施方式的阀针组件 10 的示例性装配和拆 卸过程。在装配时,使阀针 30相对于例如已经与驱动机构的相应部件连接 的套筒 20旋转至适当的周向角度(即, 使阀针 30的套环 32的通孔 321 与套筒 20的第二区段 24的轮廊部 242沿轴向方向对齐),然后将通孔 321 套在轮廓部 242上, 使得轮廓部 242插入穿过通孔 321, 直至轮廓部 242 插入穿出通孔 321。 然后, 使阀针 30连同套环 32旋转例如 90度, 使得阀 针 30的套环 32的容纳凹槽 322与轮廊部 242沿轴向方向对齐。 然后, 例 如在螺旋弹簧 40的弹性力的作用下, 使轮廊部 242压靠在容纳凹槽 322 中, 由此完成装配。 在拆卸时, 将阀针 30连同套环 32向上推压, 使得轮 廓部 242离开容纳凹槽 322。然后,使阀针 30连同套环 32旋转例如 90度, 使得阀针 30的套环 32的通孔 321与轮廓部 242沿轴向方向对齐。 然后, 向下拉出阀针 30, 由此完成拆卸。 这里, 需要注意的是, 即便在不设置例 如螺旋弹簧 40的偏置部件的情况下, 也能够适当地实现阀针组件 10的装 配和拆卸,而且也能够使阀针组件 10在电子膨胀阀的工作过程中适当地操 作。
[40]根据本发明第一实施方式,可以在不需要借助任何外部工具的情况下, 以直接用手的方式方便地和自由地按需求拆卸和更换阀针, 从而可以在单 个电子膨胀阀中通过更换不同规格的阀针来实现调节电子膨胀阀容量的 目的, 由此扩大电子膨胀阀的应用范围并增强通用性。
[41]下面,参照图 3和图 4A-4D描述根据本发明第二实施方式的阀针组 件 10A。其中,图 3是根据本发明第二实施方式的阀针组件的纵剖视图, 而图 4A-4D 是根据本发明第二实施方式的阀针组件所包括的各个部件 的立体图。
[42]为了简便起见, 下面将主要描述第二实施方式与第一实施方式的不 同之处。
[43]如图 3所示, 阀针组件 10A可以包括套筒 20A以及阀针 30A。套筒 20A 一般包括: 第一 /上部区段(内螺紋部 /防旋转部) 22A; 第二 /下部 区段(阀针接合部) 24A; 以及套环 (阴接合部 ) 26A„ 在套筒 20A的第 一区段 22A中形成有孔(例如通孔), 该孔具有圆形形状, 并且在该孔 中形成有内螺紋。 此外, 套筒 20A的第一区段 22A的外周具有防旋转 结构 (例如非圆形或多面体外周, 优选为如图 4A所示的八面体外周)。 套筒 20A的第一区段 22A用于与驱动机构的相应部件(未图示, 例如 驱动机构的与旋转马达的转子一体地旋转的心轴的下端 /外螺紋端) 螺 纹连接, 以从驱动机构接收动力, 从而能够在驱动机构的心轴旋转的情 况下沿轴向方向 A上下平移。套筒 20A的第二区段 24A用于与阀针 30A 接合, 使得阀针 30A能够随着套筒 20A的上下运动而沿轴向方向 A上 下移动。 这里, 需要指出的是, 在第二实施方式中, 套筒 20A用作根据 本发明的第一构件。
[44]在第二区段 24A的下端处设置有下部容纳腔 28A(用作根据本发明的 套环容纳腔), 套环 26A布置在下部容纳腔 28A中。 在优选的示例中, 套 环 26A通过过盈配合在下部容纳腔 28A中而固定地连接至第二区段 24A。 在套筒 20A的轴向中部处设置有中部容纳腔 29A, 中部容纳腔 29A例如 用于容纳下文将做描述的螺旋弹簧。在优选的示例中,在套筒 20A的内周 壁处、 在下部容纳腔 28A与中部容纳腔 29A之间设置有台阶部 243A, 台 阶部 243A有利于套环 26A相对于套筒 20A (具体为第二区段 24A )的稳 定定位。 在优选的示例中, 在套筒 20A的第一区段 22A的内周壁处设置 有台阶部 223A, 台阶部 223A用于支承下文将做描述的螺旋弹簧。
[45]套环 26A的结构与第一实施方式中的套环 32相似。 套环 26A具有通 孔 261A。 在优选的示例中, 通孔 261A是径向截面呈非圆形的通孔。 在更 优选的示例中, 通孔 261 A是径向截面呈大致长形的通孔, 并且具有相对 的两个大致平直的内周壁段 2612A 以及相对的两个圆弧形的内周壁段 2613A。 在一个示例中, 套环 26A在第一端(图 3中的上端)处具有容纳 凹槽 262A, 容纳凹槽 262A用于容纳下文将做描述的阀针 30A的轮廊部。 优选地, 容纳凹槽 262A是径向截面呈非圆形的容纳凹槽。 更优选地, 容 纳凹槽 262A是径向截面呈大致长形的容纳凹槽。 这里, 需要指出的是, 在第二实施方式中, 套环 (阴接合部) 26A用作根据本发明的第一接合 部。
[46]阀针 30A—般包括阀针本体 36A。 这里, 需要指出的是, 在第二实施 方式中, 阀针 30A用作根据本发明的第二构件。
[47]在阀针本体 36A的上端处设置有轮廓部(阳接合部) 365A。 轮廓部 365A的结构与第一实施方式中的轮廊部 242相似。 在优选的示例中, 轮 廓部 365A是径向截面呈非圆形的轮廓部。 在更优选的示例中, 轮廓部 365A呈大致长形板状体, 并且具有上接触表面 3651A (例如为平坦的 接触表面)、 相对的两个大致平直的侧部 3652A以及相对的两个圆弧形 的侧部 3653A。 轮廓部 365A的沿径向方向的长度 (即, 大致对应于两 个圆弧形的侧部 3653A之间的距离) 大于阀针本体 36A的上端部的外 径, 而轮廓部 365A的沿径向方向的宽度(即, 大致对应于大致平直的 侧部 3652A之间的距离)可以大于 (例如略微大于)、 等于或小于 (例 如略微小于)阀针本体 36A的上端部的外径。 这里, 需要指出的是, 在 第二实施方式中, 轮廓部(阳接合部) 365A用作根据本发明的第二接合 部。
[48]阀针组件 10A还可以包括螺旋弹簧 40A (用作根据本发明的偏置部 件)。 螺旋弹簧 40A容纳在套筒 20A的中部容纳腔 29A中。
[49]根据本发明第二实施方式的阀针组件 10A的装配和拆卸过程与根据本 发明第一实施方式的阀针组件 10装配和拆卸过程基本上相似。 [50]根据本发明第二实施方式, 相似地, 可以在不需要借助任何外部工具 的情况下, 以直接用手的方式方便地和自由地按需求拆卸和更换阀针, 从 而可以在单个电子膨胀阀中通过更换不同规格的阀针来实现调节电子膨 胀阀容量的目的, 由此扩大电子膨胀阀的应用范围并增强通用性。
[51]下面,参照图 5和图 6A-6E描述根据本发明第三实施方式的阀针组 件 10B。其中,图 5是根据本发明第三实施方式的阀针组件的纵剖视图, 而图 6A-6E 是根据本发明第三实施方式的阀针组件所包括的各个部件 的立体图。
[52]为了简便起见, 下面将主要描述第三实施方式与第一和第二实施方 式的不同之处。
[53]如图 5所示, 阀针组件 10B可以包括套筒 20B以及阀针 30B。 套筒 20B 一般包括: 第一 /上部区段(内螺紋部 /防旋转部) 22B; 以及第二 / 下部区段(阀针接合部) 24B。 在套筒 20B的第一区段 22B中形成有孔 (例如通孔), 该孔具有圆形形状, 并且在该孔中形成有内螺纹。 此外, 套筒 20B的第一区段 22B的外周具有防旋转结构 (例如非圆形或多面 体外周, 优选为八面体外周)。 套筒 20B的第一区段 22B用于与驱动机 构的相应部件(未图示, 例如驱动机构的与旋转马达的转子一体地旋转 的心轴的下端 /外螺紋端) 螺紋连接, 以从驱动机构接收动力, 从而能 够在驱动机构的心轴旋转的情况下沿轴向方向 A上下平移。 套筒 20B 的第二区段 24B用于与阀针 30B接合,使得阀针 30B能够随着套筒 20B 的上下运动而沿轴向方向 A上下移动。 这里, 需要指出的是, 在第三实 施方式中, 套筒 20B用作根据本发明的第一构件。
[54]在第二区段 24B的下端处设置有下部容纳腔 28B,阀针 30A的一部分 布置在下部容纳腔 28B 中。 在套筒 20B的轴向中部处设置有中部容纳腔 29B , 中部容纳腔 29B例如用于容纳下文将做描述的螺旋弹簧。 在优选的 示例中,在套筒 20B的内周壁处设置有台阶部 25B, 台阶部 25B用于支承 下文将做描述的螺旋弹簧。
[55]在第二区段 24B的下端的内周壁处设置有沟槽 27B, 沟槽 27B用于 容纳下文将做描述的挡圏。 这里, 需要指出的是, 在第三实施方式中, 沟槽 27B用作根据本发明的第一接合部。
[56]阀针 30B—般包括: 阀针芯部 361B、 密封件 362B以及加强件 363B。 这里, 需要指出的是, 在第三实施方式中, 阀针 30B用作根据本发明的第 二构件。
[57]在图示的示例中, 在密封件 362B处形成有沿径向方向向外凸出的凸 缘 3621B (用作根据本发明的抵接部)。 这里, 需要注意的是, 除了沿径向 方向向外或向内凸出的凸缘之外,例如阀针 30B的其它部件 /部分也可以用 于与下文将做描述的挡圏抵接以构成根据本发明的抵接部。 相应地, 在加 强件 363B处形成有沿径向方向向外凸出的凸缘 3631B。凸缘 3621B (或者 凸缘 3621B与凸缘 3631B—起)用于与下文将做描述的挡圏抵接、或者与 衬环抵接而间接地被支承挡圏。这里, 需要指出的是,在第三实施方式中, 凸缘 3621B (或者凸缘 3621B与凸缘 3631B—起 )用作根据本发明的第二 接合部。
[58]这里, 需要注意的是, 在第三实施方式中, 阀针也可以是任何其它 合适的类型, 例如第三实施方式中的阀针。 在这种情况下, 用作第二接 合部的凸缘可以是如第二实施方式中所述的轮廓部 365A的圃弧形的侧 部 2423, 或者可以是从阀针本体 36A沿径向方向向外凸出的任何其它合 适的凸缘。
[59]阀针组件 10B 包括挡圏 90B (用作根据本发明的中间构件)。 根据 第三实施方式, 套筒 20B (第一构件) 的沟槽 27B (第一接合部) 与阀 针 30B (第二构件)的凸缘 3621B (第二接合部)借助挡圏 90B而可拆 卸地连接。 挡圏 90B可以包括呈大致环形的本体部 901B以及从本体部 901B凸出的抓持部 902B。 挡圏 90B可以实施为弹性部件。 具体地, 至 少挡圏 90B的本体部 901B具有弹性从而能够弹性变形。挡圏 90B可拆 卸地布置在沟槽 27B中,使得挡圏 90B的本体部 901B—部分嵌置在沟 槽 27B中,而挡圏 90B的本体部 901B的另一部分则相对于沟槽 27B凸 出, 从而能够直接地或间接地止挡阀针 30B的凸缘 3621B进而止挡整 个阀针 30B。
[60]在优选的示例中, 抓持部 902B形成为一对, 并且从挡圏 90B的本 体部 901B大致沿径向方向向内凸出 (例如略微凸出) 然后再沿轴向方 向凸出。 由于如此构造, 可以避免抓持部与其它部件相互干涉, 同时也 在空间上确保能够方便地接触到抓持部。 通过夹压该一对抓持部 902B , 能够使本体部 901B弹性变形从而使呈大致环形的本体部 901B的环体 的直径变小以例如容易地从沟槽 27B中脱离。 [61]在优选的示例中, 挡圏 90B构造成: 在挡圏 90B处于自然状态下, 挡圏 90B的本体部 901B的环体的直径适当地大于 (优选为略微大于) 沟槽 27B的环体(即, 沟槽 27B所形成的假想环体) 的直径。 这样, 在挡圏 90B的本体部 901B容纳在沟槽 27B中的状态下,挡圏 90B的本 体部 901B可以向沟槽 27B沿径向向外方向施加适当的弹性力, 由此使 得挡圏 90B的本体部 901B更加稳定地容纳在沟槽 27B中, 进而使得阀 针 30B更加稳定地装配在套筒 20B中。
[62]在优选的示例中, 阀针组件 10B还包括衬环 95B (用作根据本发明 的附加中间构件)。衬环 95B可以在外侧与套筒 20B的第二区段 24B小 间隙配合,并且衬环 95B可以在内侧以小间隙配合的方式围绕阀针 30B 的相应部分(该相应部分位于凸缘 3621B下方)。 衬环 95B用于布置在 挡圏 90B的本体部 901B与阀针 30B的凸缘 3621B之间,从而衬环 95B 的一部分(例如内侧上部) 与凸缘 3621B抵接并且衬环 95B的一部分 (例如外侧下部)与挡圏 90B的本体部 901B抵接。通过设置衬环 95B, 一方面, 由于成本更高的阀针 30B不与挡圏 90B直接接触而可以避免 阀针 30B磨损和损坏, 另一方面, 可以改进阀针 30B在套筒 20B中的 稳定定位。
[63]阀针组件 10B 还可以包括螺旋弹簧 40B (用作根据本发明的偏置部 件)。 螺旋弹簧 40B容纳在套筒 20B的中部容纳腔 29B中。 螺旋弹簧 40B 由台阶部 25B支承, 并且将阀针 30B向下偏置。
[64]下面描述根据本发明第三实施方式的阀针组件 10B的示例性装配和拆 卸过程。 在装配时, 将阀针 30B插入套筒 20B的下部容纳腔 28B中。 然 后, 在设置有衬环 95B的情况下, 将衬环 95B插入套筒 20B的下部容纳 腔 28B中, 由此衬环 95B在外侧与套筒 20B的第二区段 24B小间隙配 合并且在内侧围绕阀针 30B的相应部分。 然后, 夹压挡圏 90B的抓持 部 902B ,以在本体部 901B的环体的直径变小的状态下将挡圏 90B的本 体部 901B嵌置在沟槽 27B中。 此时, 本体部 901B的相对于沟槽 27B 凸出的部分与阀针 30B的凸缘 3621B抵接、 或者与衬环 95B抵接而经 由衬环 95B间接地支承凸缘 3621B , 由此完成装配。 在拆卸时, 直接用 手夹压抓持部 902B , 以在本体部 901B的环体的直径变小的状态下将挡 圏 90B从沟槽 27B中拆下。 然后, 将阀针 30B从套筒 20B中拆下, 由 此完成拆卸。 在设置有螺旋弹簧 40B的情况下, 在将阀针 30B插入套筒 20B的下部容纳腔 28B中时, 需要顶着螺旋弹簧 40B的弹性力推压阀针 30B,并且在装配完成之后, 阀针 30B承受螺旋弹簧 40B的向下的弹性力。 这样, 阀针 30B相对于套筒 20B的装配可以更加稳定。 然后, 需要注意的 是,即便在不设置例如螺旋弹簧 40的偏置部件的情况下,也能够适当地实 现阀针组件 10B的装配和拆卸,而且也能够使阀针组件 10B在电子膨胀阀 的工作过程中适当地操作。
[65]这里, 需要注意的是, 在第三实施方式中, 可以容许以下变型。 亦即, 沟槽(沿径向方向向外开口的沟槽)可以形成在阀针 30B的外周处, 而凸 缘(沿径向方向向内凸出的凸缘)可以形成在套筒 20B 的第二区段 24B 的下端的内周壁处。 在该变型中, 挡圏可以构造成: 在挡圏处于自然状 态下, 挡圏的本体部的环体的直径适当地小于(优选为略微小于)沟槽 的环体(即, 沟槽所形成的假想环体)的直径。 这样, 在挡圏的本体部 容纳在沟槽中的状态下,挡圏本体部可以向沟槽沿径向向内方向施加适 当的弹性力, 由此使得挡圏本体部更加稳定地容纳在沟槽中, 进而使得 阀针更加稳定地装配在套筒中。 在该变型中, 抓持部可以形成为一对, 并且从挡圏的本体部大致沿径向方向向外凸出 (例如略微凸出)然后再 沿轴向方向凸出。 通过撑开该一对抓持部, 能够使本体部弹性变形从而 使呈大致环形的本体部的环体的直径变大以例如容易地从沟槽中脱离。 根据该变型, 同样可以实现阀针组件的自由拆卸和更换。
[66]根据本发明第三实施方式及其变型, 相似地, 可以在不需要借助任何 外部工具的情况下, 以直接用手的方式方便地和自由地按需求拆卸和更换 阀针, 从而可以在单个电子膨胀阀中通过更换不同规格的阀针来实现调节 电子膨胀阀容量的目的, 由此扩大电子膨胀阀的应用范围并增强通用性。
[67]而且, 在第三实施方式中, 挡圏是例如由钢丝制成的所谓的非标或自 制或异型挡圏。 因此, 与相关技术中的同样用于实现轴向连接的 "螺纹加 台肩" 方案相比, 根据本发明第三实施方式的可拆卸的 (柔性或刚性)轴 向连接结构可以消除振动环境下松动、 可靠性不高、 成本高、 适用范围窄 等缺点。 另一方面, 与相关技术中的同样用于防止轴向串动的 "标准挡圏 (参见图 14, 图 14是示出相关技术中的挡圏的立体图)"方案相比, 根据 本发明第三实施方式的可拆卸的轴向连接结构可以: 在例如径向空间比较 小的情况下使用、 可以消除或减小 "标准挡圏" 方案所存在的一定的轴向 公称间隙量、 在装配和拆卸时无需使用专用工具从而装配和拆卸更加简 单、 通用性得以改进、 本身结构简单、 并且相关成本得以减小。 特别地, 根据本发明第三实施方式的挡圏 (孔用非标挡圏) 以及根据其变型的挡圏 (轴用非标挡圏), 由于可以根据具体情况按需求进行非标设计, 因此可 以设计出各种非标挡圏来满足实际装配及空间要求, 从而通用性得以大大 地增强。
[68]根据本发明的另外方面, 提供一种电子膨胀阀, 该电子膨胀阀可以包 括驱动机构、 阀座以及如上所述的阀针组件。 在该电子膨胀阀中, 阀针组 件的第一构件(套筒)可以与驱动机构的相应部件连接, 以从驱动机构接 收动力, 从而沿轴向方向上下移动。 另外, 阀针组件的与第一构件可拆 卸地连接的第二构件(阀针)可以随着第二构件的上下运动而沿轴向方向 上下移动从而调节流过电子膨胀阀的制冷剂流体的流量, 并且能够与阀 座接合从而关闭电子膨胀阀。
[69]下面,参照图 7、图 8、图 9A-9C和图 10以及前面的图 5和图 6A-6E 进一步描述根据本发明的挡圏及其应用。 其中, 图 7是示出使用根据本发 明的孔用挡圏的心轴与动铁的组装体的立体图, 图 8是示出使用根据本发 明的孔用挡圏的心轴与动铁的组装体的纵剖视图, 图 9A-9C是心轴与动铁 的组装体所包括的各个部件的立体图,而图 10是示出使用根据本发明的孔 用挡圏的套筒与阀针的组装体的立体图。
[70]如图所示, 挡圏 90B可以用来可拆卸地连接心轴 70B (用作才艮据本发 明的另一方面的阳连接件)和动铁 80B (用作根据本发明的另一方面的阴 连接件)。 具体地, 在心轴 70B的上端处设置有凸缘(用作根据本发明的 抵接部)、 或者与心轴 70B的上端例如轴向固定地连接的轴衬 72B (用作 根据本发明的抵接部)。另外,在动铁 80B的下端处设置有下部容纳腔 82B, 用于容纳心轴 70B的上端。 在下端的内周壁处设置有沟槽 84B。 由此, 由 挡圏 90B、心轴 70B的凸缘或设置于心轴 70B的轴衬 72B、以及动铁 80B 的沟槽 84B构成了根据本发明的轴向止位机构。 在一个示例中, 在动铁 80B的下端的内周壁处、 在沟槽 84B上方设置有台阶部 86B, 台阶部 86B 用于与心轴 70B的凸缘或设置于心轴 70B的轴衬 72B抵接, 由此使心轴 70B与动铁 80B更加稳定地装配或者可以限制心轴 70B与动铁 80B在 轴向上下双方向上的相对移动。
[71]另外, 如图 10所示以及如上文参照图 5等所述, 挡圏 50B可以用来 可拆卸地连接套筒 20B (用作才艮据本发明的另一方面的阴连接件)和阀针 30B (用作根据本发明的另一方面的阳连接件)。 由此, 由挡圏 50B、 套筒 20B的沟槽 27B、 以及阀针 30B的凸缘 3621B构成了根据本发明的另一 轴向止位机构。
[72]下面, 参照图 11、 图 12以及图 13A-13C进一步描述根据本发明的挡 圏(孔用挡圏)及其应用。 其中, 图 11是示出使用根据本发明的轴用挡圏 的心轴与轴衬的组装体的立体图,图 12是示出使用根据本发明的轴用挡圏 的心轴与轴衬的组装体的纵剖视图,而图 13A-13C是心轴与轴衬的组装体 所包括的各个部件的立体图。
[73]如图所示, 轴用挡圏 90C可以用来可拆卸地连接心轴 70C (用作才艮据 本发明的另一方面的阳连接件)和轴衬 72C (用作根据本发明的另一方面 的阴连接件)。 具体地, 在心轴 70C的上端的外周处设置有沟槽 74C。 由 此, 由挡圏 90C、 心轴 70C的沟槽 74C、 以及轴衬 72C构成了根据本发 明的另一轴向止位机构。 在一个示例中, 在动铁 70C的上端的外周处、 在沟槽 74C下方设置有台阶部 76C , 台阶部 76C用于与轴衬 72C抵接, 由此使心轴 70C与轴衬 72C更加稳定地装配或者可以限制心轴 70C与 轴衬 72C在轴向上下双方向上的相对移动。
[74]如图 13B所示, 挡圏 90C可以包括呈大致环形的弹性本体部 901C以 及一对抓持部 902C ,每个抓持部 902C分别从弹性本体部的相应末端延伸 出。在优选的示例中,抓持部 902C从弹性本体部 901C的末端大致沿径向 方向向外延伸然后再沿轴向方向延伸。 由于如此构造, 可以避免抓持部 与其它部件相互干涉, 同时也在空间上确保能够方便地接触到抓持部。
[75]根据本发明的另外方面, 提供一种电子膨胀阀, 该电子膨胀阀可以包 括如上所述的一个或多个挡圏、 或者一个或多个轴向止位机构。
[76]上文已具体描述本发明示例性实施方式及其变型, 但是本领域技术 人员应当理解, 本发明并不局限于上述具体的实施方式 /示例 /变型而是 可以包括多种不同的可能方案。
[77] 例如, 根据本发明的第一方面, 提供一种阀针组件, 包括: 第一构 件, 所述第一构件与驱动机构的传动部件连接或者与所述传动部件成一 体, 所述第一构件从所述驱动机构接收动力从而能够沿轴向方向上下移 动; 以及第二构件, 所述第二构件包括阀针, 所述第二构件与所述第一构 件可拆卸地连接, 所述第二构件能够随着所述第一构件的上下运动而沿轴 向方向上下移动, 使得阀针能够与阀座接合或分离。
[78] 根据本发明的第二方面, 在上述阀针组件中, 所述第一构件具有第 一 ^部, 所述第二构件具有第二接合部, 所述第一接合部与所述第二接 合部可拆卸地连接。
[79] 根据本发明的第三方面, 在上述阀针组件中, 所述第一接合部是轮 廓部和套环中的一者, 所述第二接合部是套环和轮廓部中的另一者, 并且 所述套环具有通孔, 使得在装配时所述轮廊部能够从所述套环的第一端侧 插入穿过所述通孔, 但是在所述轮廓部插入穿出所述通孔之后绕轴向方向 旋转至预定周向角度的情况下所述轮廓部被所述套环止挡而不能够沿轴 向方向往回移动。
[80] 根据本发明的第四方面, 在上述阀针组件中, 所述轮廊部的径向截 面呈非圆形, 所述通孔是与所述轮廓部大致匹配的非圆形通孔。
[81 ] 根据本发明的第五方面, 在上述阀针组件中, 所述轮廊部呈大致长 形板状体, 并且具有接触表面、 两个相对的大致平直的侧部以及两个相对 的圆弧形的侧部, 并且所述通孔相应地是径向截面呈大致长形的通孔, 并 且具有两个相对的大致平直的内周壁段以及两个相对的圆弧形的内周壁 段。
[82] 根据本发明的第六方面, 在上述阀针组件中, 所述套环在与所述第 一端侧相反的第二端侧处设置有容纳凹槽, 所述容纳凹槽用于容纳所述轮 廓部, 使得所述轮廓部被止挡而不能够沿轴向方向往回移动。
[83] 根据本发明的第七方面, 在上述阀针组件中, 所述容纳凹槽是与所 述轮廓部大致匹配的非圃形容纳凹槽。
[84] 根据本发明的第八方面, 在上述阀针组件中, 所述容纳凹槽是与所 述轮廓部大致匹配的径向截面呈大致长形的容纳凹槽。
[85] 根据本发明的第九方面, 在上述阀针组件中, 所述通孔是与所述轮 廓部大致匹配的径向截面呈大致长形的通孔, 所述容纳凹槽的轴向中心线 与所述通孔的轴向中心线大致重合, 并且所述容纳凹槽的径向纵长轴线与 所述通孔的径向纵长轴线沿圆周方向相互偏移。
[86] 根据本发明的第十方面, 在上述阀针组件中, 所述容纳凹槽的径向 纵长轴线与所述通孔的径向纵长轴线沿圆周方向相互偏移 90度。
[87] 根据本发明的第十一方面, 在上述阀针组件中, 所述阀针组件还包 括偏置部件, 所述偏置部件设置在所述第一构件与所述第二构件之间, 以 便沿使所述第一构件与所述第二构件相互分离的方向偏压所述第一构件 和所述第二构件。
[88] 根据本发明的第十二方面, 在上述阀针组件中, 所述第一 部是 设置在所述第一构件的下端处的所述轮廓部, 所述第二接合部是设置在所 述第二构件的上端处的所述套环, 并且所述第二构件还包括筒体以及连接 在所述筒体的下端处的阀针本体, 在所述筒体的上端处设置有套环容纳 腔, 所述套环容纳在所述套环容纳腔中。
[89] 根据本发明的第十三方面, 在上述阀针组件中, 所述套环以过盈配 合方式容纳在所述套环容纳腔中。
[90] 根据本发明的第十四方面, 在上述阀针组件中, 在所述筒体中设置 有中部容纳腔, 并且所述阀针组件还包括偏置部件, 所述偏置部件容纳在 所述中部容纳腔中, 以便向上偏压所述轮廊部从而使所述轮廓部抵靠所述 套环。
[91] 根据本发明的第十五方面, 在上述阀针组件中, 所述阀针组件还包 括设置在所述轮廓部与所述偏置部件之间的垫片。
[92] 根据本发明的第十六方面, 在上述阀针组件中, 所述阀针本体被连 接成能够相对于所述筒体沿轴向方向上下移动, 并且所述阀针组件还包括 设置在所述偏置部件与所述阀针本体之间的力传递组件, 所述力传递组件 与所述阀针本体点接触, 以便实现阀针相对于阀座的自对中。
[93] 根据本发明的第十七方面, 在上述阀针组件中, 所述偏置部件是螺 旋弹簧。
[94] 根据本发明的第十八方面, 在上述阀针组件中, 所述第一^ ^部是 设置在所述第一构件的下端处的所述套环, 所述第二接合部是设置在所述 第二构件的上端处的所述轮廊部, 并且所述第一构件是套筒, 在所述套筒 的下端处设置有套环容纳腔, 所述套环容纳在所述套环容纳腔中。
[95] 根据本发明的第十九方面, 在上述阀针组件中, 所述套环以过盈配 合方式容纳在所述套环容纳腔中。
[96] 根据本发明的第二十方面, 在上述阀针组件中, 在所述套筒中设置 有中部容纳腔, 并且所述阀针组件还包括偏置部件, 所述偏置部件容纳在 所述中部容纳腔中, 以便向下偏压所述轮廊部从而使所述轮廓部抵靠所述 套环。 [97] 根据本发明的第二十一方面, 在上述阀针组件中, 所述偏置部件是 螺旋弹簧。
[98] 根据本发明的第二十二方面, 在上述阀针组件中, 所述第一接合部 是沟槽和抵接部中的一者并且设置在所述第一构件的下端处, 所述第二接 合部是抵接部和沟槽中的另一者, 并且所述阀针组件还包括中间构件, 所 述第一接合部与所述第二接合部借助所述中间构件而可拆卸地连接。
[99] 根据本发明的第二十三方面, 在上述阀针组件中, 所述中间构件是 弹性挡圏, 所述弹性挡圏可拆卸地布置在所述沟槽中, 使得所述弹性挡圏 的一部分嵌置在所述沟槽中、 并且所述弹性挡圏的另一部分从所述沟槽凸 出从而能够止挡所述拍接部。
[】()()]根据本发明的第二十四方面, 在上述阀针组件中, 所述弹性挡圏包 括呈大致环形的本体部以及从所述本体部延伸出的抓持部„
[101]根据本发明的第二十五方面, 在上述阀针组件中, 所述第一构件是 套筒, 所述第一接合部是设置在所述套筒的下端的内周壁处的所述沟槽, 所述第二接合部是设置在所述第二构件处的所述抵接部, 并且所述抓持部 设置为一对, 并且分别从所述本体部的末端大致沿径向方向向内延伸然后 再沿轴向方向延伸。
[102]根据本发明的第二十六方面, 在上述阀针组件中, 所述第一构件是 套筒, 所述第一接合部是设置在所述套筒的下端处的所述抵接部, 所述第 二接^部是,置在^ "述第 ,构件^:的所 ,,,、 †所述抓 部设 为了 方向延伸。
[103]根据本发明的第二十七方面, 在上述阀针组件中, 所述阀针组件还 包括衬环, 所述衬环设置在所述弹性挡圏与所述抵接部之间, 所述衬环的 一部分能够与所述弹性挡圏抵接并且所述衬环的另一部分能够与所述抵 接部抵接。
[1()4]根据本发明的第二十八方面, 在上述阀针组件中, 所述抵接部是沿 径向方向向外凸出的凸缘或者是沿径向方向向内凸出的凸缘。
[105]根据本发明的第二十九方面, 提供一种电子膨胀阀, 包括: 驱动 机构; 阀座; 以及如上所述的阀针组件。
[106]根据本发明的第三十方面, 在上述电子膨胀阀中, 所述驱动机构是 电磁式驱动机构, 所述电磁式驱动机构包括电磁线圏以及用作所述传动部 件的柱塞。
[107]根据本发明的第三十一方面, 在上述电子膨胀阀中, 所述驱动机构 是电动式驱动机构, 所述电动式驱动机构包括马达以及心轴, 所述心轴构 造成与所述马达的转子一体地旋转, 所述心轴用作所述传动部件。
[108]根据本发明的第三十二方面, 在上述电子膨胀阀中, 所述第一构件 与所述心轴固定地连接或者以螺紋传动方式螺纹连接。
[109]根据本发明的第三十三方面, 在上述电子膨胀阀中, 所述第一构件 是套筒, 所述套筒在外周处设置有防旋转结构, 并且在所述套筒中设置有 内螺紋部, 所述内螺紋部与所述心轴的外螺紋端螺紋连接。
[110]在本申请文件中, 方位术语 "上"、 "下"、 "上方" 和 "下方" 等的使 用仅仅出于便于描述的目的, 而不应视为是限制性的。
[111] 总之, 尽管文中已详细描述本发明, 但是应当理解本发明并不局限 于文中详细描述和示出的具体实施方式 /示例 /变型。 在不偏离本发明的实 质和范围的情况下可由本领域技术人员实现进一步的变型和变体。 所有这 些变型和变体都落入本发明的范围内。 另外, 所有在此描述的构件 /部件都 可以由其它技术性上等同的构件 /部件来代替。

Claims

权利要求书
1. 一种阀针组件(10, 10A, 10B ), 包括:
第一构件(20, 20 A , 20B ), 所述第一构件与驱动机构的传动部件连 接或者与所述传动部件成一体, 所述第一构件从所述驱动机构接收动力从 而能够沿轴向方向 (A )上下移动; 以及
第二构件( 30, 30A, 30B ), 所述第二构件包括阀针, 所述第二构件 与所述第一构件可拆卸地连接, 所述第二构件能够随着所述第一构件的上 下运动而沿轴向方向 (A )上下移动, 使得阀针能够与阀座接合或分离。
2.根据权利要求 1所述的阀针组件(10, 10A, 10B ), 其中, 所述第 一构件(20, 20A, 20B )具有第一接合部 ( 242, 26 A , 27B ), 所述第二 构件(30, 30A, 30B )具有第二接合部( 32, 365A, 3621B ), 所述第一 接合部与所述第二接合部可拆卸地连接。
3.根据权利要求 2所述的阀针组件(10, 10A ), 其中
所述第一接合部 (242, 26A )是轮廊部 (242 )和套环( 26A ) 中的 一者, 所述第二接合部 ( 32, 365A )是套环(32 )和轮廓部 ( 365A ) 中 的另一者, 并且
所述套环 ( 32, 26A )具有通孔(321, 261A ), 使得在装配时所述轮 廓部(242, 365A )能够从所述套环的第一端侧插入穿过所述通孔, 但是 在所述轮廓部插入穿出所述通孔之后绕轴向方向 (A )旋转至预定周向角 度的情况下所述轮廓部被所述套环止挡而不能够沿轴向方向 (A )往回移 动。
4.根据权利要求 3所述的阀针组件( 10, 10A:),其中,所述轮廓部( 242, 365A ) 的径向截面呈非圆形, 所述通孔(321, 261A )是与所述轮廊部大 致匹配的非圆形通孔。
5.根据权利要求 4所述的阀针组件(10, 10A ), 其中
所述轮廓部( 242, 365A:)呈大致长形板状体,并且具有接触表面( 2421 , 3651A)、 两个相对的大致平直的侧部(2422, 3652A )以及两个相对的圆 弧形的侧部 (2423, 3653A), 并且
所述通孔(321, 261A)相应地是径向截面呈大致长形的通孔, 并且 具有两个相对的大致平直的内周壁段(3212, 2612A) 以及两个相对的圆 弧形的内周壁段( 3213, 2613A)o
6.根据权利要求 3所述的阀针组件(10, 10A),其中, 所述套环(32, 26A )在与所述第一端侧相反的第二端侧处设置有容纳凹槽( 322, 262A ), 所述容纳凹槽用于容纳所述轮廓部(242, 365A), 使得所述轮廓部被止挡 而不能够沿轴向方向 (A)往回移动。
7.根据权利要求 6所述的阀针组件(10, 10A), 其中, 所述容纳凹槽 (322, 262A)是与所述轮廓部 (242, 365A )大致匹配的非圆形容纳凹 槽。
8.根据权利要求 7所述的阀针组件(10, 10A), 其中, 所述容纳凹槽 (322, 262A)是与所述轮廊部 (242, 365A )大致匹配的径向截面呈大 致长形的容纳凹槽。
9.根据权利要求 8所述的阀针组件(10, 10A), 其中
所述通孔(321, 261A)是与所述轮廊部 (242, 365A )大致匹配的 径向截面呈大致长形的通孔,
所述容纳凹槽 (322, 262A) 的轴向中心线与所述通孔(321, 261 A ) 的轴向中心线大致重合, 并且
Figure imgf000022_0001
沿圆周方向相互偏移,
10.根据权利要求 9所述的阀针组件( 10, 10A), 其中, 所述容纳凹 槽的径向纵长轴线(B1)与所述通孔的径向纵长轴线(B2)沿圆周方向相 互偏移 90度。
11.才艮据权利要求 2所述的阀针组件(10, 10A, 10B ), 其中, 所述 阀针组件还包括偏置部件( 40, 40A, 40B ), 所述偏置部件设置在所述第 一构件(20, 20A, 20B)与所述第二构件(30, 30A, 30B )之间, 以便 沿使所述第一构件与所述第二构件相互分离的方向偏压所述第一构件和 所述第二构件。
12.根据权利要求 3所述的阀针组件 (10), 其中
所述第一接合部 ( 242 )是设置在所述第一构件( 20 )的下端处的所述 轮廓部( 242 ),
所述第二接合部 (32)是设置在所述第二构件(30)的上端处的所述 套环 ( 32 ), 并且
所述第二构件还包括筒体(34) 以及连接在所述筒体的下端处的阀针 本体(36), 在所述筒体的上端处设置有套环容纳腔( 341 ), 所述套环容纳 在所述套环容纳腔中。
13.根据权利要求 12所述的阀针组件 ( 10), 其中, 所述套环 (32) 以过盈配合方式容纳在所述套环容纳腔(341) 中。
14.根据权利要求 12所述的阀针组件(10), 其中
在所述筒体(34) 中设置有中部容纳腔(342), 并且
所述阀针组件还包括偏置部件( 40 ),所述偏置部件容纳在所述中部容 纳腔中, 以便向上偏压所述轮廓部( 242 )从而使所述轮廊部抵靠所述套环 (32)。
15.根据权利要求 14所述的阀针组件(10), 其中, 所述阀针组件还 包括设置在所述轮廓部(242)与所述偏置部件(40)之间的垫片 (50)。
16.根据权利要求 14所述的阀针组件 ( 10), 其中
所述阀针本体 (36)被连接成能够相对于所述筒体(34) 沿轴向方向 (A)上下移动, 并且 所述阀针组件还包括设置在所述偏置部件(40)与所述阀针本体之间 的力传递组件(60), 所述力传递组件与所述阀针本体点接触, 以便实现阀 针相对于阀座的自对中。
17.根据权利要求 14所述的阀针组件( 10 ),其中,所述偏置部件( 40 ) 是螺旋弹簧( 40 )。
18.根据权利要求 3所述的阀针组件 ( 10A), 其中
所述第一接合部 ( 26A )是设置在所述第一构件( 20A )的下端处的所 述套环 ( 26A ),
所述第二接合部 ( 365A)是设置在所述第二构件(30A)的上端处的 所述轮廓部( 365A ), 并且
所述第一构件是套筒(20A), 在所述套筒的下端处设置有套环容纳腔 ( 28A ), 所述套环容纳在所述套环容纳腔中。
19.根据权利要求 18所述的阀针组件 ( 10A ),其中, 所述套环 ( 26A ) 以过盈配合方式容纳在所述套环容纳腔(28A) 中。
20.根据权利要求 18所述的阀针组件 (10A), 其中
在所述套筒 (20A) 中设置有中部容纳腔(29A), 并且
所述阀针组件还包括偏置部件(40A), 所述偏置部件容纳在所述中部 容纳腔中, 以便向下偏压所述轮廊部( 365A )从而使所述轮廊部抵靠所述 套环 ( 26A )„
21.根据权利要求 20 所述的阀针组件 (10A), 其中, 所述偏置部件 ( 40A )是螺旋弹簧( 40A )„
22.根据权利要求 2所述的阀针组件 ( 10B ), 其中
所述第一接合部 ( 27B )是沟槽( 27B )和抵接部中的一者并且设置在 所述第一构件(20B)的下端处, 所述第二接合部 ( 3621B )是抵接部 ( 3621B )和沟槽中的另一者, 并 且
所述阀针组件还包括中间构件( 90B ), 所述第一接合部与所述第二接 合部借助所述中间构件而可拆卸地连接。
23.根据权利要求 22 所述的阀针组件 ( 10B ), 其中, 所述中间构件 ( 90B )是弹性挡圏( 90B ),所述弹性挡圏可拆卸地布置在所述沟槽( 27B ) 中, 使得所述弹性挡圏的一部分嵌置在所述沟槽中、 并且所述弹性挡圏的 另一部分从所述沟槽凸出从而能够止挡所述抵接部 ( 3621B )。
24.根据权利要求 23所述的阀针组件 ( 10B ), 其中, 所述弹性挡圏包 括呈大致环形的本体部( 901B )以及从所述本体部延伸出的抓持部( 902B )。
25.根据权利要求 24所述的阀针组件 ( 10B ), 其中
所述第一构件( 20B )是套筒( 20B ), 所述第一接合部 ( 27B )是设置 在所述套筒的下端的内周壁处的所述沟槽(27B ),
所述第二接合部 ( 3621B )是设置在所述第二构件( 30B )处的所述抵 接部 ( 3621B ), 并且
所述抓持部 ( 902B )设置为一对, 并且分别从所述本体部 ( 901B )的 末端大致沿径向方向向内延伸然后再沿轴向方向 (A )延伸。
26.根据权利要求 24所述的阀针组件 ( 10B ), 其中
所述第一构件(20B )是套筒 (20B ), 所述第一接合部是设置在所述 套筒的下端处的所述抵接部,
所述第二接合部是设置在所述第二构件处的所述沟槽, 并且
所述抓持部设置为一对, 并且分别从所述本体部的末端大致沿径向方 向向外延伸然后再沿轴向方向 (A )延伸。
27.根据权利要求 23所述的阀针组件 ( 10B ), 其中, 所述阀针组件还 包括衬环 (95B ), 所述衬环设置在所述弹性挡圏 (90B ) 与所述抵接部 ( 3621B )之间, 所述衬环的一部分能够与所述弹性挡圏抵接并且所述衬 环的另一部分能够与所述抵接部抵接。
28.根据权利要求 22所述的阀针组件 ( 10B ), 其中, 所述 部是沿 径向方向向外凸出的凸缘( 3621B )或者是沿径向方向向内凸出的凸缘。
29. 一种电子膨胀阀, 包括:
驱动机构;
阀座; 以及
如权利要求 1至 28中任一项所述的阀针组件 ( 10, 10A, 10B )。
30.根据权利要求 29所述的电子膨胀阀, 其中, 所述驱动机构是电磁 式驱动机构, 所述电磁式驱动机构包括电磁线圏以及用作所述传动部件的 柱塞。
31.根据权利要求 29所述的电子膨胀阀, 其中, 所述驱动机构是电动 式驱动机构, 所述电动式驱动机构包括马达以及心轴, 所述心轴构造成与 所述马达的转子一体地旋转, 所述心轴用作所述传动部件。
32.根据权利要求 31所述的电子膨胀阀, 其中, 所述第一构件(20, 20 A , 20B )与所述心轴固定地连接或者以螺纹传动方式螺纹连接。
33.根据权利要求 32所述的电子膨胀阀, 其中, 所述第一构件(20, 20A, 20B )是套筒(20, 20A, 20B ), 所述套筒在外周处设置有防旋转结 构, 并且在所述套筒中设置有内螺紋部, 所述内螺紋部与所述心轴的外螺 紋端螺纹连接。
PCT/CN2013/088058 2013-01-08 2013-11-28 阀针组件以及包括该阀针组件的电子膨胀阀 WO2014107998A1 (zh)

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US20210239378A1 (en) * 2018-05-08 2021-08-05 Emerson Climate Technologies (Suzhou) Co., Ltd. Valve needle assembly and electronic expansion valve having the valve needle assembly
CN114121771A (zh) * 2021-11-18 2022-03-01 深圳新益昌科技股份有限公司 顶针机构及顶晶设备
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US20210239378A1 (en) * 2018-05-08 2021-08-05 Emerson Climate Technologies (Suzhou) Co., Ltd. Valve needle assembly and electronic expansion valve having the valve needle assembly
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