WO2020259656A1 - 一种电子膨胀阀 - Google Patents

一种电子膨胀阀 Download PDF

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Publication number
WO2020259656A1
WO2020259656A1 PCT/CN2020/098380 CN2020098380W WO2020259656A1 WO 2020259656 A1 WO2020259656 A1 WO 2020259656A1 CN 2020098380 W CN2020098380 W CN 2020098380W WO 2020259656 A1 WO2020259656 A1 WO 2020259656A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve needle
nut
seat
guide section
Prior art date
Application number
PCT/CN2020/098380
Other languages
English (en)
French (fr)
Inventor
魏先让
Original Assignee
浙江三花智能控制股份有限公司
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
Application filed by 浙江三花智能控制股份有限公司 filed Critical 浙江三花智能控制股份有限公司
Priority to KR1020217035646A priority Critical patent/KR102597661B1/ko
Priority to CN202080013129.XA priority patent/CN113748287B/zh
Priority to EP20832602.5A priority patent/EP3992501A4/en
Priority to US17/604,070 priority patent/US11906055B2/en
Priority to JP2021577020A priority patent/JP7353397B2/ja
Publication of WO2020259656A1 publication Critical patent/WO2020259656A1/zh

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Classifications

    • 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
    • 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
    • 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
    • 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
    • F16K1/42—Valve seats
    • 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
    • F16K1/48—Attaching valve members to screw-spindles
    • F16K1/487—Attaching valve members to screw-spindles by a fixing element extending in the axial direction of the spindle, e.g. a screw
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention relates to the technical field of refrigeration control, in particular to an electronic expansion valve.
  • the electronic expansion valve is mainly used in the frequency conversion air conditioning system.
  • the electronic controller controls the rotation of the stepper motor rotor. Through the transmission of the nut and the screw rod, the valve needle is driven to move axially relative to the valve port, thereby adjusting the flow of the valve port. Area to realize automatic adjustment of refrigerant flow.
  • valve needle If the valve needle is skewed relative to the valve port, it is easy to cause eccentric wear of the valve needle and affect the working effect of the electronic expansion valve.
  • an electronic expansion valve can be designed, the valve needle of which is not easy to deviate from the valve port.
  • the object of the present invention is to provide an electronic expansion valve, the valve needle of which is not easily deflected relative to the valve port.
  • an electronic expansion valve including a valve needle screw assembly, the valve needle screw assembly including a valve needle, a valve needle sleeve, and a screw assembly;
  • valve needle is fixedly connected to the valve needle sleeve, the valve needle sleeve includes a peripheral wall portion and a matching portion, and the inner diameter of the matching portion is smaller than the inner diameter of the peripheral wall portion;
  • the screw assembly includes a valve needle support part, the valve needle support part includes a valve needle support washer or a suspension engagement part or a bushing washer, the valve needle support washer or the suspension engagement part or the The sleeve gasket can abut against the matching portion of the valve needle sleeve;
  • the valve needle screw assembly further includes an outer edge guide section, and the electronic expansion valve includes an inner edge guide section matched with the outer edge guide section.
  • the outer edge guide section of the valve needle screw assembly and the inner edge guide section of the electronic expansion valve are matched to provide guidance for the valve needle, and the relative reduction of the valve needle The valve port is skewed, thereby reducing the eccentric wear of the valve needle.
  • FIG. 1 is a cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention in a fully closed state
  • FIG. 2 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention in a fully open state
  • FIG. 3 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention when the valve needle and the valve port sealing part just contact;
  • FIG. 4 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention when the spring has not been further compressed at the critical point;
  • FIG. 5 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention in a fully closed state
  • Figure 6 is a cross-sectional view of the valve needle screw assembly in Figure 1;
  • Figure 7 is an exploded view of the valve needle screw assembly in Figure 6;
  • Figure 8 is a partial cross-sectional view of another valve needle screw assembly provided by the present invention in a fully open state
  • valve needle screw assembly provided by the present invention in a fully open state
  • valve needle screw assembly provided by the present invention in a fully open state
  • FIG. 11 is a partial cross-sectional view of another valve needle screw assembly provided by the present invention in a fully open state
  • Figure 12 is a partial cross-sectional view of another valve needle screw assembly provided by the present invention in a fully open state
  • FIG. 13 is a partial cross-sectional view of the second embodiment of the electronic expansion valve provided by the present invention in a fully open state
  • FIG. 14 is a partial cross-sectional view of the third embodiment of the electronic expansion valve provided by the present invention in a fully open state
  • 15 is a partial cross-sectional view of the fourth embodiment of the electronic expansion valve provided by the present invention in a fully open state
  • Figure 16 is a partial cross-sectional view of another valve needle screw assembly provided by the present invention in a fully open state
  • Figure 17 is a partial cross-sectional view of another valve needle screw assembly provided by the present invention in a fully open state
  • valve needle screw assembly 11. valve needle; 111, valve needle sealing part; 112, valve needle upper wire section; 113, step part; 114, valve needle lower guide section; 12. valve needle sleeve; 121, fit Part; 122, peripheral wall part; 13, spring washer part; 14, spring; 15, screw assembly; 16, outer edge guide section; 151, screw rod; 1511, spring lower groove part; 1512, valve needle support groove 1513, valve needle support flange valve needle support flange; 1514, spring upper ring groove; 153, lower stop part; 1531, lower flange part; 154, valve needle support part; 1541, valve needle Support washer; 155, upper stop portion; 1551, upper flange portion; 1552, upper retaining ring; 156, sleeve part; 1561, structural hole portion; 1562, body portion; 1563, suspension engagement portion; 20, Valve body; 2, valve seat assembly; 2A, inner edge guide section; 21, valve seat; 211, valve port; 2111, valve port sealing part; 212, internal
  • Figure 1 is a cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention when fully closed
  • Figure 2 is the first embodiment of the electronic expansion valve provided by the present invention fully open
  • Fig. 3 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention when the valve needle and the valve port sealing part just contact
  • Fig. 4 is the first embodiment of the electronic expansion valve provided by the present invention, the spring return
  • Fig. 5 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention when the critical point is not further compressed
  • Fig. 6 is a cross-sectional view of the valve needle screw assembly in Fig. 1
  • FIG. 6 is an exploded view of the valve needle screw assembly
  • Fig. 16 is a partial cross-sectional view of another valve needle screw assembly provided by the present invention in a fully open state
  • Fig. 17 is a partial cross-sectional view of another valve needle screw assembly provided by the present invention. Partial sectional view in the open state;
  • FIG. 1 is a cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention in a fully closed state.
  • the electronic expansion valve provided by the present invention consists of a valve body 20 and a stator coil 30. constitute.
  • the valve body 20 includes a valve needle screw assembly 1, a valve seat assembly 2, a nut assembly 3, a rotor assembly 4 and a housing 5.
  • the stator coil 30 of the electronic expansion valve is connected to the drive controller. After the drive controller is energized, it sends a pulse drive signal to the stator coil 30.
  • the stator coil 30 generates a periodically changing magnetic field to drive the rotor assembly 4 of the electronic expansion valve to perform a forward or In reverse rotation, the rotor assembly 4 is fixedly connected to the screw rod 151 of the valve pin screw assembly 1, and the rotor assembly 4 will synchronously drive the screw rod 151 to rotate when it rotates.
  • the screw rod 151 of the valve needle screw assembly 1 is provided with an external thread, and the inner hole of the nut 31 of the nut assembly 3 is provided with an internal thread.
  • the screw rod 151 and the nut 31 are threaded, and the rotor assembly 4 rotates while the wire
  • the rod 151 will move along the axial direction, thereby driving the valve needle screw assembly 1 to realize the opening and closing action of the valve port 211.
  • the valve seat assembly 2 provided in this embodiment includes a valve seat 21, a first connecting portion 22, a second connecting portion 23, a guide seat 24, and a connecting seat 25.
  • the first connecting portion 22, the second connecting portion 23, and the guide seat 24 And the connecting seat 25 and the valve seat 21 are fixedly assembled.
  • the first connecting portion 22 and the second connecting portion 23 are fixedly connected to the valve seat 21, and the fluid medium can flow out of the second connecting portion 23 from the first connecting portion 22 through the valve seat 21.
  • the fluid medium can also be
  • the second connecting portion 23 flows through the valve seat 21 and then flows out from the first connecting portion 22.
  • the first connecting portion 22 and the second connecting portion 23 serve as the inflow or outflow channel of the fluid medium of the electronic expansion valve, and are generally used to connect with the system pipeline when the electronic expansion valve is installed in a refrigeration or heating system such as an air conditioner.
  • the valve seat 21 is provided with a valve port 211 at a position close to the center of the second connecting portion 23, and a valve port sealing portion 2111 is provided on the upper edge of the valve port 211.
  • the center inner hole of the guide seat 24 of the valve seat assembly 2 is provided with an inner edge guide section 2A that matches with the outer wall of the valve needle screw assembly 1.
  • the inner edge guide section 2A is the valve
  • the needle screw assembly 1 provides a guiding function.
  • a nut assembly 3 is arranged concentrically.
  • the nut assembly 3 includes a nut 31, a nut connecting body 32, a sliding ring 33 and a spiral guide 34.
  • the nut 31 can be fixedly connected to the valve seat assembly 3 by means of welding or the like through the nut connecting body 32.
  • the nut connecting body 32 is welded to the connecting seat.
  • a sliding ring 33 and a spiral guide 34 are provided on the outer circle of the nut 31 on the upper side.
  • the sliding ring 33 can spirally rotate along the spiral guide 34 within the upper and lower stroke limits.
  • the sliding ring 33 and the spiral guide 34 are connected to the rotor Component 4 cooperates to realize the stroke control of the electronic expansion valve from fully open to fully closed.
  • the rotor assembly 4 includes a rotor magnet 41, a rotor connecting portion 42, and a rotor stopper 43 (the rotor stopper 43 and the rotor magnet 41 can be integrally formed, and a separate assembly method is adopted in this embodiment).
  • the rotor assembly 4 can be fixedly connected with the screw 151 of the valve pin screw assembly 1 through the rotor connecting body 4 (for example, welding connection can be adopted).
  • the rotor assembly 4 is driven by the stator coil 60 to drive the screw 151 to rotate synchronously.
  • a rotor stop part 43 is provided inside the rotor assembly 4, and the rotor stop part 43 cooperates with the sliding ring 33 on the nut 31 and the spiral guide 34 to limit the rotation of the rotor assembly 4 within a prescribed stroke range.
  • the electronic expansion valve provided by this embodiment also includes a housing 5 with an open end, which is sleeved on the outside of the rotor assembly 4.
  • the opening of the housing 5 is welded and sealed with the connecting seat 25 on the upper side of the valve seat assembly 2 to form a closed containment. Cavity.
  • the valve needle screw assembly 1 mainly includes the valve needle 11, the valve needle sleeve 12, the spring washer portion 13, the spring 14 and the screw assembly 15.
  • Figure 6 shows the valve needle screw assembly. Sectional view
  • Figure 7 is an exploded view of the valve needle screw assembly
  • valve needle 11 and the valve needle sleeve 12 can be fixedly connected by welding or the like.
  • One end of the valve needle 11 includes a valve needle sealing portion 111, which is used to cooperate with the valve port sealing portion 2111 to close the valve port 211.
  • the sleeve 12 includes a peripheral wall portion 122 on its outer periphery and a matching portion 121 integrally formed with the peripheral wall portion 122.
  • the peripheral wall portion 122 and the matching portion 121 can also be fixedly connected by welding, clamping, etc., and the inner diameter of the peripheral wall portion 122 It is larger than the inner diameter of the mating part 121.
  • the valve needle 11 and the valve needle sleeve 12 form a receiving cavity A after being fixedly connected. Therefore, the valve needle 11 and the valve needle sleeve 12 define the receiving cavity A.
  • the valve needle 11 includes an upper valve needle guide section 112. After the valve needle 11 and the valve needle sleeve 12 are fixedly connected, the outer edges of the valve needle 11 and the valve needle sleeve 12 can be simultaneously matched with the inner wall of the guide seat 24 At this time, the valve needle 11 and the peripheral wall portion 122 of the valve needle sleeve jointly define the outer edge guide section 16, which is located on the outer wall of the valve needle 11 guide section 112 and the peripheral wall portion 12.
  • the parts matching the inner wall of the guide seat 24 will also change.
  • the inner diameter of the outer wall of the guide section 112 on the valve needle is larger than that of the peripheral wall
  • the inner diameter of the outer wall of the part 122 only the upper guide section 112 of the valve needle and the guide seat 24 are guided and matched.
  • the guiding function of the valve needle screw assembly 1 is from the upper end of the valve needle to the inner edge of the section 112 and the guide seat 24.
  • the guide section 2A ensures that, at this time, the upper guide section 112 of the valve needle defines the outer edge guide section 16.
  • valve needle 11 also includes a lower valve needle guide section 114.
  • the outer diameter of the lower valve needle guide section 114 is smaller than the outer diameter of the upper valve needle guide section 112.
  • guide seat 24 is also provided with a valve The small inner edge guide section 241 is matched with the needle lower guide section 114.
  • the small inner edge guide section 241 extends substantially along the inner wall of the guide seat 24 toward the center of its circle, so as to cooperate with the lower guide section 114 of the valve needle.
  • At least one of the upper guide section 112 of the valve needle and the peripheral wall portion 122 defines the outer edge guide section 16.
  • the inner diameter of the outer edge guide section 16 can be set to be larger than the inner diameter of the inner edge guide section 2A, and the outer diameter of the outer edge guide section 16 is larger than the inner edge guide section.
  • the inner diameter of the section 2A is smaller by 0.02mm-.015mm.
  • the inner diameter of the small inner edge guide section 241 is larger than the outer diameter of the lower valve needle guide section 114 by 0.02-0.05mm.
  • the nut 31 further includes a nut guide section 311, and the nut guide section 311 is sheathed on the guide seat 24. At this time, the inner wall of the nut guide section 311 is matched with the outer wall of the guide seat 24.
  • peripheral wall portion 122 of the valve needle sleeve 12 may further extend upward, and therefore, the height of the peripheral wall portion 122 is not further limited in the present invention.
  • the spring washer portion 13 provided in this embodiment may adopt a combination of a snap ring and a washer. That is, in this embodiment, the spring washer portion 13 includes both a snap ring and a washer.
  • the opening retaining ring of the spring washer portion 13 in the embodiment is not limited to the C-shaped opening retaining ring shown in the figure, and other shapes of opening retaining ring can also be used instead; similarly, the washer in this embodiment is not limited to the figure.
  • the annular gasket shown in the figure can also be replaced by other retaining rings that can play the same role, for example, an open retaining ring can also be used instead.
  • the rotational friction mating surfaces are mainly on the upper and lower surfaces of the opening retaining ring, or on the upper and lower surfaces of the washer
  • a coating with lubricating and wear-resistant functions on its surface for example, a coating containing polytetrafluoroethylene, or containing graphite, or containing molybdenum disulfide). Layer
  • the screw assembly 15 includes a lower stop portion 153 that abuts against the spring washer portion 13.
  • the screw rod 151 includes a lower spring groove portion 1511 and a lower spring groove portion 1511 It is formed recessed along the surface of the screw rod 151.
  • the screw rod assembly 15 forms a lower flange portion 1531.
  • the lower stop portion 153 is a lower flange portion 1531.
  • the lower spring groove portion 151 is provided with a spring washer portion 13, and at this time, the spring washer portion 13 is connected to the lower spring groove portion 152 in a limiting position.
  • the lower flange portion 1531 can also be formed in different ways.
  • the screw rod 151 does not include the lower spring groove portion 1511, and the lower flange portion 1531 may be formed by extending the lower end of the screw rod 151 in the circumferential direction along its surface. At this time, the lower flange portion 1531 can still abut the spring washer portion 13.
  • the screw assembly 15 further includes an upper stopper 155, and the upper stopper 155 abuts against the spring 14.
  • the screw assembly 15 includes an upper flange portion 1551 that extends along the The surface of the screw rod 151 extends in the circumferential direction.
  • the upper flange portion 1551 and the screw rod 151 can be integrally formed or fixedly connected by welding or the like.
  • the upper stop portion 155 is the upper flange portion 1551.
  • the spring 14 is also sheathed on the screw rod 151. Specifically, one end of the spring 14 abuts against the upper flange 1551, and the other end of the spring 14 abuts against the spring washer part 13. Under the action of the spring 14, the spring washer part 13 and the lower The flange portion 1531 abuts. It is worth noting that one end of the spring 14 abuts the upper flange 1551, including one end of the spring 14 directly abuts the upper flange 1551, and also includes one end of the spring 14 indirectly abuts the upper flange 1551, for example, the spring 14 and The upper flange 1551 is directly provided with a retaining ring or other components.
  • the spring 14 is sheathed on the screw rod 151, and the upper end of the spring 14 abuts against the upper stop part 155, and the lower end of the spring 14 abuts against the lower stop part 153. 14 and the screw assembly 15 can relatively reduce the deflection of the spring 14, thereby reducing eccentric wear.
  • the screw valve needle assembly 1 provided in this embodiment further includes a valve needle support portion 154, and the valve needle support portion 154 abuts against the mating portion 121.
  • the screw rod assembly 15 includes a sleeve member 156.
  • the sleeve member 156 includes a hole portion 1561, a body portion 1562, and a suspension engaging portion 1563.
  • the hole portion 1561 may be a through hole or a blind hole.
  • One end of the screw rod 151 is connected to the hole portion 1561. The connection can be fixed by welding, interference fit, etc.
  • the suspension engaging portion 1563 extends along the circumferential direction of the body portion 1562. At this time, the outer diameter of the suspension engaging portion 1563 is larger than the outer diameter of the body portion 1562.
  • the valve needle support portion 154 is a suspension card At this time, the outer diameter of the suspension engaging portion 1563 is larger than the inner diameter of the mating portion 121.
  • the distance D1 between the suspension engaging portion 1563 and the first retaining ring 13 is greater than or equal to the distance D2 between the suspension engaging portion 1563 and the upper end of the mating portion 121.
  • the distance between D1-D2 can be between 0-0.03mm.
  • valve needle 11 can be hung on the suspension engaging portion 1563 through the valve needle sleeve 12. Since the valve needle 11 is hung on the suspension engaging portion 1563 through the valve needle sleeve 12, the valve needle 11 is not subjected to the elastic load generated by the spring 14. .
  • FIG. 2 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention in a fully open state.
  • the stroke of the valve needle 11 from the valve port 211 is L.
  • the spring 14 is in its initial compressed state, and the slidable spring washer portion 13 provided on the valve needle screw assembly 1 abuts on the upper surface of the lower flange portion 1531 , The valve needle 11 is not subjected to the elastic load generated by the spring 11.
  • the valve needle 11 is suspended on the suspension engaging portion 1563 through the valve needle sleeve 12.
  • the screw rod 151 will move along the axis, and the distance between the valve needle sealing portion 111 of the valve needle 11 and the valve port sealing portion 2111 of the valve port 211 will also change.
  • FIG. 3 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention when the valve needle and the valve port sealing part just contact, the electronic expansion valve is from the fully open state to the valve needle sealing part 111 Just touching the valve port sealing part 2111, the displacement amount of the valve needle 11 moving down at this time is L.
  • the spring 11 is always in its initial compression state, and the lower stop part 153 provided on the screw rod 151 always abuts against the wire
  • the valve needle 11 is not subjected to the elastic load generated by the compression spring 11 in this state.
  • the lower surface of the first retaining ring 13 and the mating portion 121 of the valve needle sleeve 12 The upper surface still maintains a certain amount of gap D1-D2.
  • FIG. 4 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention when the spring has not been further compressed at the critical point.
  • the screw rod 151 in FIG. 4 continues to move downward by the displacement of D1-D2.
  • the lower surface of the spring washer portion 13 is just in contact with the upper end of the mating portion 121 of the valve needle sleeve 12
  • the critical point at this time is equivalent to that the spring 14 is at the critical point to be further compressed, and the valve needle 11 and the valve needle sleeve 12 are at the critical point to bear the elastic load of the compression spring 12 that is further compressed.
  • FIG. 5 is a partial cross-sectional view of the first embodiment of the electronic expansion valve provided by the present invention in a fully closed state. Compared with the state in FIG. 4, the screw rod 151 in FIG. 5 has moved downward by a displacement amount of ⁇ .
  • FIG. 8 is a partial cross-sectional view of another valve needle screw assembly when it is fully opened;
  • the screw assembly 15 includes a lower stop portion 153, which can abut against the spring washer portion 13, specifically
  • the screw assembly 15 includes a sleeve part 156, which includes a hole portion 1561, a body portion 1562, and a suspension engaging portion 1563.
  • the hole portion 1561 can be a through hole or a blind hole.
  • One end of the rod 151 and the hole portion 1561 can be fixedly connected by welding, interference fit, or the like.
  • the suspension engaging portion 1563 extends along the circumferential direction of the body portion 1562. At this time, the outer diameter of the suspension engaging portion 1563 is larger than the outer diameter of the body portion 1562.
  • the valve needle support portion 154 is a suspension card The engagement portion 1563. At this time, the outer diameter of the suspension engagement portion 1563 is larger than the inner diameter of the mating portion 121. Therefore, the suspension engagement portion 1563 can abut against the engagement portion 121 of the valve needle sleeve 12.
  • the lower stop portion 153 of the valve needle screw assembly 1 is no longer the lower flange portion 1531.
  • the lower stop portion 153 is the body portion 1562 of the sleeve member 156, that is, in this embodiment, the body portion 1562 can collide with the spring washer portion 13.
  • the “capable” mentioned in the present invention refers to the electronic expansion valve in a specific state, and does not mean that the electronic expansion valve is in all working states.
  • the body portion 1562 can be combined with the spring washer portion 13 Offset means that the valve port 211 is fully opened, etc.
  • the distance between D1-D2 can be between 0-0.03mm.
  • FIG. 9 is a partial cross-sectional view of another valve needle screw assembly in a fully open state.
  • the screw assembly 15 includes a valve needle support portion 154.
  • the upper surface of the valve needle support portion 154 can abut against the mating portion 121 of the valve needle sleeve 12.
  • the screw assembly 15 includes a valve needle support washer 1541.
  • the stem 151 is also provided with a valve needle support groove portion 1512 and a valve needle support flange portion 1513.
  • the valve needle support groove portion 1512 is recessed along the surface of the screw rod 151. Therefore, the valve needle support groove portion 1512 is located below the valve needle support groove portion 1512.
  • the needle support flange portion 1513 protrudes relative to the circumference of the valve needle support groove portion 1512, the valve needle support washer 1541 is assembled in the valve needle support groove portion 1512, specifically, the valve needle support washer 1541 and the valve needle support groove
  • the part 1512 is fixedly connected or connected with a limit position.
  • valve needle support flange portion 1513 can be used for the molding of the valve needle support flange portion 1513.
  • the screw rod 151 does not include the valve needle support groove portion 1512, and the valve needle support flange portion 1513 may be formed by the screw rod 151.
  • the lower end is formed along the circumferential direction of the surface. At this time, the valve needle support flange 1513 can still abut against the valve needle support washer 1541.
  • valve needle support portion 154 is a valve needle support washer 1541, and the upper surface of the valve needle support washer 1541 can abut against the mating portion 121 of the valve needle sleeve 12.
  • valve needle 11 can pass and The fixedly connected valve needle sleeve 12 is supported by the valve needle support washer 154.
  • valve needle support portion 154 is no longer a suspension engagement portion 1563, and the valve needle support portion 154 is a valve needle support washer 154, that is, in this embodiment, the mating portion 121 and The valve pin support washer 1541 can be offset.
  • the “capable” mentioned in the present invention refers to the electronic expansion valve in a specific state, and does not mean that the electronic expansion valve is in all states.
  • the mating portion 121 and the valve needle support washer 1541 can Offset means that the valve port 211 is fully opened, etc.
  • the surface of the valve needle support washer 1541 can be sprayed or plated with a coating with lubricating and wear-resistant functions (for example, containing polytetrafluoroethylene, or containing graphite, Or a coating containing molybdenum disulfide), thereby increasing the service life of the electronic expansion valve.
  • a coating with lubricating and wear-resistant functions for example, containing polytetrafluoroethylene, or containing graphite, Or a coating containing molybdenum disulfide
  • Figure 10 is a partial cross-sectional view of another valve needle screw assembly when it is fully opened
  • the screw assembly 15 includes an upper stopper 155, and the upper stopper 155 abuts against the spring 14.
  • the screw assembly 15 is equipped with an upper retainer ring 1552.
  • the screw 151 is also An upper spring ring groove 1514 is provided.
  • the upper spring ring groove 1514 is recessed along the surface of the screw rod 151.
  • the upper retaining ring 1552 is assembled in the upper spring ring groove 1514.
  • the upper retaining ring 1552 and the spring upper ring groove 1514 The fixed connection or the limit connection, that is, it is locked into the annular groove 1514 on the spring to limit the position.
  • the upper stop portion 155 is no longer an upper flange portion 1551, and the upper stop portion 155 is an upper stop ring 1552, that is, in this embodiment, the upper stop ring 1552 abuts the spring 14.
  • the spring 14 is sleeved on the shaft of the screw rod 151, and the upper end of the spring 14 abuts against the lower end surface of the upper retaining ring 1552.
  • the present invention does not limit the number of retaining rings in the upper retaining ring 1552.
  • the upper retaining ring 1552 provided on the upper ring groove 1514 of the spring of the screw rod 151 can be composed of an open retaining ring, It is also possible to add one or more retaining rings on the lower side of the open retaining ring to form a superposition.
  • the distance between the suspension engaging portion 1563 and the lower flange portion 1531 is D1
  • the distance between the suspension engaging portion 1563 and the upper end of the mating portion 121 is D2, which still satisfies D1 ⁇ D2.
  • the rotating friction surface may also occur between the upper end of the spring 14 and the upper retaining ring 1552.
  • Figure 11 is a partial cross-sectional view of another valve needle screw assembly when it is fully opened
  • the number of the spring washer portion 13 of the valve needle screw assembly 1 is one. This embodiment illustrates that: in the present invention, the number of the spring washer portion 13 is not limited.
  • the spring 14 is sheathed on the screw rod 151, and the upper end of the spring 14 abuts against the upper stop part 155, and the lower end of the spring 14 abuts against the lower stop part 153. 14 and the screw assembly 15 can relatively reduce the deflection of the spring 14, thereby reducing eccentric wear.
  • the distance between the suspension engaging portion 1563 and the spring washer portion 13 is D1
  • the distance between the suspension engaging portion 1563 and the upper end of the mating portion 121 is D2, which still satisfies D1 ⁇ D2.
  • FIG. 12 is a partial cross-sectional view of another valve needle screw assembly in a fully open state
  • a sleeve gasket 157 is added between the sleeve part 156 and the valve needle sleeve 22.
  • valve needle support portion 154 is a sleeve washer 157, and the upper surface of the sleeve washer 157 and the lower surface of the mating portion 121 of the valve needle sleeve 12 can abut.
  • the upper end of the suspension engaging portion 1542 can abut against the mating portion 121 of the valve needle sleeve 12, and it is not limited to the direct abutment between the two, but also includes the indirect abutment between the two.
  • the distance between the sleeve washer 157 and the spring washer portion 13 is D1
  • the distance between the sleeve washer 157 and the upper end of the mating portion 121 is D2, which still satisfies D1 ⁇ D2.
  • a coating with lubricating and wear-resistant functions on the surface of the sleeve gasket 157 for example, containing polytetrafluoroethylene.
  • Ethylene, or coating containing graphite or molybdenum disulfide composition thereby increasing the service life of the electronic expansion valve.
  • FIG. 17 is a schematic structural diagram of another valve needle screw assembly
  • the valve needle includes a step portion 113.
  • the peripheral wall portion 122 of the valve needle sleeve 12 is sheathed on the side surface of the step portion 113 and is connected to the step portion 113.
  • the stepped surface of the part 113 abuts, and the mating part 121 is an annular protrusion extending inward from the inner wall of the peripheral wall 122.
  • the suspension engaging part 1563 is located at the upper end of the sleeve member 156, which is more It is easy to engage with the mating portion 121 formed as above. At this time, the valve needle 11 and the valve needle sleeve 12 can be fixedly connected by welding, crimping or the like.
  • FIG. 13 is a partial cross-sectional view of the second embodiment of the electronic expansion valve provided by the present invention when it is fully opened;
  • the purpose of the present invention is mainly to improve the screw valve needle assembly 1 of the electronic expansion valve.
  • the electronic expansion valve such as magnetic rotor assembly, screw valve needle assembly, nut assembly, stop device, etc.
  • the components can all adopt general technology, or other electronic expansion valve structures that can achieve the same function.
  • valve seat assembly 2 the structure of the valve seat assembly 2 is slightly different.
  • the valve seat assembly 2 is assembled and fixedly connected by a valve seat 21, a first connecting portion 22, a second connecting portion 23, and a guide seat 24.
  • the nut member 30 is fixedly connected to the upper side of the valve seat 21 through the nut connecting body 32, and the fixed connection method may preferably adopt a welding fixed connection method.
  • the valve needle 11 includes an upper valve needle guide section 112. After the valve needle 11 and the valve needle sleeve 12 are fixedly connected, the outer edges of the valve needle 11 and the valve needle sleeve 12 can be simultaneously matched with the inner wall of the guide seat 24 At this time, the valve needle 11 and the peripheral wall portion 122 of the valve needle sleeve 12 jointly define the outer edge guide section 16, and the outer edge guide section 16 is located on the outer wall of the upper guide section 112 and the peripheral wall portion 122 of the valve needle 11.
  • the parts that cooperate with the inner wall of the guide seat 24 will also change.
  • the inner diameter of the outer wall of the guide section 112 on the valve needle is larger than that of the peripheral wall
  • the inner diameter of the outer wall of the part 122 only the upper guide section 112 of the valve needle and the guide seat 24 are guided and matched.
  • the guiding function of the valve needle screw assembly 1 is from the upper end of the valve needle to the inner edge of the section 112 and the guide seat 24.
  • the guide section 2A ensures that, at this time, the upper guide section 112 of the valve needle defines the outer edge guide section 16.
  • the spring 14 is sheathed on the screw rod 151, and the upper end of the spring 14 abuts against the upper stop part 155, and the lower end of the spring 14 abuts against the lower stop part 153. 14 and the screw assembly 15 can relatively reduce the deflection of the spring 14, thereby reducing eccentric wear.
  • Figure 14 is a partial cross-sectional view of the third embodiment of the electronic expansion valve provided by the present invention in a fully open state
  • valve seat assembly 2 is assembled and fixedly connected by the valve seat 21, the first connecting portion 12 and the second connecting portion 13.
  • the center inner hole of the valve seat 21 of the valve seat assembly 2 is provided with an inner hole guide section 212 that matches with the valve pin screw assembly 1.
  • the inner hole guide section 212 of the valve seat 21 is The valve needle screw assembly 1 provides a guiding function.
  • the inner hole guide section 212 of the valve seat 21 cooperates with the outer edge of the valve needle 11 and/or the peripheral wall portion 122 of the valve needle sleeve 12 to form a valve needle screw assembly 1 Provide guidance.
  • the valve seat assembly 2 includes a valve seat 21, a first connecting portion 22, and a second connecting portion 23.
  • the first connecting portion 22 and the second connecting portion 23 are fixedly connected to the valve seat 21, and the fluid medium can be A connecting portion 22 flows out from the second connecting portion 23 through the valve seat 21.
  • the fluid medium can also flow from the second connecting portion 23 through the valve seat 21 and then out of the first connecting portion 22.
  • valve seat 21 is also provided with an inner edge guide section 2A that cooperates with the valve needle screw assembly 1. At this time, the valve seat 21 defines the inner edge guide section 2A.
  • FIG. 15 is a partial cross-sectional view of the fourth embodiment of the electronic expansion valve provided by the present invention in a fully open state
  • the valve seat assembly 2 is assembled and fixedly connected by a valve seat 21, a first connecting portion 22, a second connecting portion 23, and a connecting seat 25.
  • the first connecting portion 12 is fixedly connected to the connecting seat 25, and the second The connecting portion 13 is fixedly connected to the valve seat 21.
  • the inner edge guide portion 2A is provided on the inner hole wall on the upper side of the valve port 211 of the valve seat 21.
  • the inner hole guide section 212 of the valve seat assembly 2 provides a guide for the valve needle screw assembly 1 effect.
  • the valve needle screw assembly 1 cooperates with the inner hole guide section 10b of the valve seat member to realize the guiding and guiding function of the valve needle.
  • the inner hole guide section 212 of the valve seat 21 cooperates with the outer edge of the valve needle 11 and/or the peripheral wall 122 of the valve needle sleeve 12 to provide guidance for the valve needle screw assembly 1.
  • the nut 31 further includes a nut guide section 311 which is sheathed on the valve seat 21. At this time, the inner wall of the nut guide section 311 matches the outer wall of the valve seat 21.
  • orientation nouns such as up, down, left, and right mentioned in this embodiment are all introduced based on the drawings in the specification for ease of description; and "first” and “in the names of components” Ordinal numbers such as “second” are also introduced for ease of description, and do not imply any restriction on any order of components.

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  • General Engineering & Computer Science (AREA)
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Abstract

一种电膨胀阀，该阀针丝杆组件（1）还包括外缘导向段（16），该电子膨胀阀包括与该外缘导向段（16）配合的内缘导向段（12A），该电子膨胀阀其阀针（11）在动作过程中，阀针丝杆组件（1）的外缘导向段（16）与电子膨胀阀的内缘导向段（12A）相配合，为阀针（11）提供导向，相对减少了阀针（11）相对于阀口出现偏斜的情况，从而减少了阀针出现偏心磨损的情况。

Description

一种电子膨胀阀
本申请要求于2019年06月28日提交中国专利局、申请号为201910574593.5、发明名称为“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】
本发明涉及制冷控制技术领域，特别涉及一种电子膨胀阀。
【背景技术】
电子膨胀阀主要应用于变频空调系统中，由电子控制器控制步进电机转子的旋转，通过螺母与丝杆的传动，带动阀针相对于阀口作轴向移动，从而调节阀口的通流面积，以实现制冷剂流量的自动调节。
若阀针相对于阀口出现偏斜的情况，容易导致阀针出现偏心磨损的情况，影响电子膨胀阀的工作效果。
因此，可以设计一种电子膨胀阀，其阀针相对于阀口不易产生偏斜。
【发明内容】
本发明的目的在于提供一种电子膨胀阀，其阀针相对与阀口不易产生偏斜。
为实现上述目的，采用如下技术方案：一种电子膨胀阀，包括阀针丝杆组件，所述阀针丝杆组件包括阀针、阀针套以及丝杆组件；
所述阀针与所述阀针套固定连接，所述阀针套包括周壁部和配合部，所述配合部的内径小于所述周壁部的内径；
所述丝杆组件包括阀针支撑部，所述阀针支撑部包括阀针支撑垫圈或悬吊卡合部或轴套垫圈，所述阀针支撑垫圈或所述悬吊卡合部或所述轴套垫圈能够与所述阀针套的所述配合部相抵；
所述阀针丝杆组件还包括外缘导向段，所述电子膨胀阀包括与所述外缘导向段配合的内缘导向段。
本发明提供的电子膨胀阀，其阀针在动作过程中，阀针丝杆组件的外缘导向段与电子膨胀阀的内缘导向段相配合，为阀针提供导向，相对减少了阀针相对于阀口出现偏斜的情况，从而减少了阀针出现偏心磨损的情况。
【附图说明】
图1为本发明提供的电子膨胀阀第一实施例全闭状态时的剖视图；
图2为本发明提供的电子膨胀阀第一实施例全开状态时的局部剖视图；
图3为本发明提供的电子膨胀阀第一实施例阀针与阀口密封部刚接触时的局部剖视图；
图4为本发明提供的电子膨胀阀第一实施例弹簧还没有被进一步压缩的临界点时的局部剖视图；
图5为本发明提供的电子膨胀阀第一实施例全闭状态时的局部剖视图；
图6为图1中阀针丝杆组件的剖视图；
图7为图6中阀针丝杆组件的爆炸图；
图8为本发明提供的另一种阀针丝杆组件全开状态时的局部剖视图；
图9为本发明提供的另一种阀针丝杆组件全开状态时的局部剖视图；
图10为本发明提供的另一种阀针丝杆组件全开状态时的局部剖视图；
图11为本发明提供的另一种阀针丝杆组件全开状态时的局部剖视图；
图12为本发明提供的另一种阀针丝杆组件全开状态时的局部剖视图；
图13为本发明提供的电子膨胀阀第二实施例全开状态时的局部剖视图；
图14为本发明提供的电子膨胀阀第三实施例全开状态时的局部剖视图；
图15为发明提供的电子膨胀阀第第四实施例全开状态时的局部剖视图；
图16本发明提供的另一种阀针丝杆组件全开状态时的局部剖视图；
图17本发明提供的另一种阀针丝杆组件全开状态时的局部剖视图；
其中，上述附图包括以下附图标记：
1、阀针丝杆组件；11、阀针；111、阀针密封部；112、阀针上导线段；113、台阶部；114、阀针下导向段；12、阀针套；121、配合部；122、周壁部；13、弹簧垫圈部；14、弹簧；15、丝杆组件；16、外缘导向段；151、丝杆；1511、弹簧下凹槽部；1512、阀针支撑凹槽部；1513、阀针支撑凸缘部阀针支撑凸缘部；1514、弹簧上环形凹槽；153、下止挡部；1531、下凸缘部；154、阀针支撑部；1541、阀针支撑垫圈；155、上止挡部；1551、上凸缘部；1552、上挡圈；156、轴套部件；1561、结构孔部；1562、本体部；1563、悬吊卡合部；20、阀体；2、阀座组件；2A、内缘导向段；21、阀座；211、阀口；2111、阀口密封部；212、内控导向段；22、第一接管部部；23、第二接管部部；24、导向座；241、小内缘导向段；25、连接座；3、螺母组件；31、螺母；32、螺母连接部；33、滑动环；4、转子组件；41、转子磁体；42、转子连接部；43、转子止动部；5、外壳；30、定子线圈；
【具体实施方式】
为了使本领域的技术人员更好地理解本发明的技术方案，下面结合附图和具体实施例对本发明作进一步的详细说明。
请参考图1至图7、图16，其中，图1为本发明提供的电子膨胀阀第一实施例全闭状态时的剖视图；图2为本发明提供的电子膨胀阀第一实施例全开状态时的局部剖视图；图3为本发明提供的电子膨胀阀第一实施例阀针与阀口密封部刚接触时的局部剖视图；图4为本发明提供的电子膨胀阀第一实施例弹簧还没有被进一步压缩的临界点时的局部剖视图；图5为本发明提供的电子膨胀阀第一实施例全闭状态时的局部剖视图；图6为图1中阀针丝杆组件的剖视图；图7为图6中阀针丝杆组件的爆炸图；图16本发明提供的另一种阀针丝杆组件全开状态时的局部剖视图；图17本发明提供的另一种阀针丝杆组件全开状态时的局部剖视图；
请具体参考图1，图1为本发明提供的电子膨胀阀第一实施例全闭状态时的剖视图，在一种具体实施例中，本发明提供的电子膨胀阀由阀体20和定子线圈30构成。阀体20包括阀针丝杆组件1、阀座组件2、螺母组件3、转子组件4和外壳5。电子膨胀阀的定子线圈30连接驱动控制器，驱动控制器通电后，向定子线圈30发出脉冲驱动信号，定子线圈30产生周期性变化的磁场，从而驱动电子膨胀阀的转子组件4进行正向或反向旋转，转子组件4与阀针丝杆组件1的丝杆151固定连接，转子组件4在旋转时会同步带动丝杆151进行旋转。阀针丝杆组件1的丝杆151上设有外螺纹，螺母组件3的螺母31的内孔部位设有内螺纹，丝杆151与螺母31为螺纹配合，转子组件4旋转运动的同时，丝杆151会沿轴方向发生位移运动，从而可带动阀针丝杆组件1实现阀口211的开闭动作。
本实施例提供的阀座组件2，包括阀座21、第一接管部22、第二接管部23、导向座24和连接座25，第一接管部22、第二接管部23、导向座24和连接座25与阀座21固定组装。具体的，第一接管部22、第二接管部23与阀座21固定连接，流体介质能够由第一接管部22通过阀座21从第二接管部23流出，当然，流体介质也可以由第二接管部23流经阀座21再从第一接管部22流出。
第一接管部22和第二接管部23作为电子膨胀阀流体介质的流入或流出通道，一般用于其安装在空调等制冷、制热系统中时与系统管路连接。阀座21在第二接管部23靠近中心的位置，设置有阀口211，阀口211的上侧边缘设有阀口密封部2111。
阀座组件2的导向座24的中心内孔位置，设有与阀针丝杆组件1的外壁相配合的内缘导向段2A，电子膨胀阀进行开闭动作时，内缘导向段2A为阀针丝杆组件1提供引导导正作用。
阀座组件2的上侧，同轴心设置有螺母组件3，螺母组件3包括螺母31、螺母连接体32、滑动环33和螺旋导轨34。螺母31可以通过螺母连接体32与阀座组件3采用焊接等方式固定连接，在本实施例中，螺母连接体32焊接于连接座。
螺母31靠上侧的外圆上，设置有滑动环33和螺旋导轨34，滑动环33 可沿螺旋导轨34在上、下限定的行程范围内螺旋转动，上述滑动环33和螺旋导轨34与转子组件4配合，用于实现电子膨胀阀从全开与全闭之间的行程控制。
转子组件4包括转子磁体41、转子连接部42、转子止动部43(转子止动部43与转子磁体41可以一体成型，本实施中采用分体组装的方式)。转子组件4可以通过转子连接体4部与阀针丝杆组件1的丝杆151固定连接(比如可采用焊接连接)，转子组件4在定子线圈60的驱动下，带动丝杆151同步转动。转子组件4内侧设置有转子止动部43，转子止动部43与螺母31上的滑动环33和螺旋导轨34配合，用于限制转子组件4在规定的行程范围内转动。
另外，本实施例提供的电子膨胀阀还包括一端开口的外壳5，套装在转子组件4的外部，外壳5的开口与阀座组件2的上侧的连接座25焊接密封，构成一个密闭的容纳腔。
阀针丝杆组件1主要包括阀针11、阀针套12、弹簧垫圈部13、弹簧14以及丝杆组件15，具体的，请参考图6和图7，图6为阀针丝杆组件的剖视图；图7为阀针丝杆组件的爆炸图；
其中，阀针11与阀针套12可以通过焊接等方式固定连接，阀针11的一端包括阀针密封部111，用于与阀口密封部2111相配合以实现阀口211的关闭，阀针套12包括位于其外周的周壁部122以及与周壁部122一体成型的配合部121，当然，周壁部122与配合部121也可以采用焊接、卡接等方式固定连接，并且，周壁部122的内径大于配合部121的内径。阀针11与阀针套12固定连接后形成一个容纳腔A，因此，阀针11与阀针套12限定容纳腔A。
在本实施例中，阀针11包括阀针上导向段112，阀针11与阀针套12固定连接之后，阀针11与阀针套12的外缘可以同时与导向座24的内壁相配合，此时，阀针11和阀针套的周壁部122共同限定了外缘导向段16，外缘导向段16位于阀针11的阀针上导向段112和周壁部12的外壁。
当然，当阀针上导向段112与周壁部12的外径存在差异时，与导向座24的内壁相配合的部件也会发生变化，例如，当阀针上导向段112的外壁 的内径大于周壁部122的外壁的内径时，仅存在阀针上导向段112与导向座24导向配合，此时阀针丝杆组件1的引导导正作用由阀针上端向段112与导向座24的内缘导向段2A来保证，此时，阀针上导向段112限定外缘导向段16。
同理，当周壁部122的外壁的内径大于阀针上导向段112的外壁的内径时，仅存在周壁部122与导向座24的导向配合，此时阀针丝杆组件1的引导导正作用由周壁部122与导向座24的内缘导向段2A来保证，此时，周壁部122限定外缘导向段16。
此外，在本实施例中，阀针11还包括阀针下导向段114，阀针下导向段114的外径小于阀针上导向段112的外径，此外，导向座24还设有与阀针下导向段114相配合的小内缘导向段241。
小内缘导向段241大致沿着导向座24的内壁朝其圆心方向延伸形成，以与阀针下导向段114配合。
因此，在本实施例中，阀针上导向段112和周壁部122至少其中一者限定外缘导向段16。
为了确保外缘导向段16与内缘导向段2A之间的导向效果，可以设置为外缘导向段16的内径大于内缘导向段2A的内径，且外缘导向段16的外径比内缘导向段2A的内径小0.02mm-.015mm，同理，小内缘导向段241的内径比阀针下导向段114的外径大0.02-0.05mm。此外，在本实施例中，螺母31还包括螺母导向段311，螺母导向段311外套于导向座24，此时，螺母导向段311的内壁与导向座24的外壁相配合。
此外，经具体参考图16，在图16中，阀针套12的周壁部122还可以进一步向上延伸，因此，本发明对周壁部122的高度不作进一步限制。
本实施例提供的弹簧垫圈部13可以采用开口挡圈和垫圈组合的方式，即在本实施例中，弹簧垫圈部13同时包括开口挡圈与垫圈，当然，从本发明的功能原理出发，本实施例中的弹簧垫圈部13的开口挡圈并不仅限于图示中的C形开口挡圈，也可以采用其它形状的开口挡圈替代；同理，本实施例中的垫圈，也不限于图示中的圆环形垫圈，也可采用能起到同样作用的其它挡圈替代，例如也可采用开口挡圈替代。
本实施方式中，当与阀针11固定连接的阀针套12与丝杆151发生相对旋转时，其旋转摩擦配合面主要在开口挡圈的上、下表面，或者在垫圈的上、下表面，为了进一步减小其相对旋转的摩擦阻力，优选的可以在其表面喷涂或镀覆具有润滑耐磨功能的涂层(例如含有聚四氟乙烯，或者含有石墨，或者含有二硫化钼成分的涂层)，从而提高电子膨胀阀的使用寿命。
该丝杆组件15包括下止挡部153，下止挡部153与弹簧垫圈部13相抵，具体的，在本实施例中，丝杆151包括弹簧下凹槽部1511，弹簧下凹槽部1511沿丝杆151的表面凹陷而形成，此时，丝杆组件15形成下凸缘部1531，在本实施例中，下止挡部153为下凸缘部1531。
在弹簧下凹槽部151，设有弹簧垫圈部13，此时，弹簧垫圈部13与弹簧下凹槽部152限位连接。
值得注意的是，下凸缘部1531也可以采用不同的成型方式，例如，丝杆151不包括弹簧下凹槽部1511，下凸缘部1531可以由丝杆151下端沿其表面周向延伸形成，此时，下凸缘部1531仍然可以与弹簧垫圈部13相抵。
此外，丝杆组件15还包括上止挡部155，上止挡部155与弹簧14相抵，具体的，在本实施例中，丝杆组件15包括上凸缘部1551，上凸缘部1551沿丝杆151的表面周向延伸，上凸缘部1551与丝杆151可以采用一体成型的方式，也可以通过焊接等方式固定连接，在本实施例中，上止挡部155为上凸缘部1551。
此外，弹簧14还外套于丝杆151，具体的，弹簧14的一端与上凸缘部1551相抵，弹簧14另一端与弹簧垫圈部13相抵，在弹簧14的作用下，弹簧垫圈部13与下凸缘部1531相抵。值得说明的是，弹簧14的一端与上凸缘部1551相抵，包括弹簧14的一端与上凸缘部1551直接相抵，也包括弹簧14的一端与上凸缘部1551间接相抵，例如弹簧14与上凸缘部1551直接设置有挡圈或者其他部件。
由于弹簧垫圈部13与弹簧下凹槽部152限位连接，此时，由于弹簧14对弹簧垫圈部13的影响，弹簧垫圈部13与下凸缘部1531相抵。
本实施例提供的电子膨胀阀，其弹簧14外套于丝杆151，且弹簧14 的上端与所述上止挡部155相抵，所述弹簧14的下端与所述下止挡部153相抵，弹簧14与该丝杆组件15配合，可以相对降低弹簧14出现偏斜的情况，从而减少偏心磨损。
此外，本实施例提供的丝杆阀针组件1，还包括阀针支撑部154，阀针支撑部154与配合部121相抵，具体的，在本实施例中，丝杆组件15包括轴套部件156，轴套部件156包括接孔部1561、本体部1562以及悬吊卡合部1563，该接孔部1561可以为通孔，也可以为盲孔，丝杆151的一端与该接孔部1561可以通过焊接、过盈配合等方式固定连接。
悬吊卡合部1563沿本体部1562的周向延伸，此时，悬吊卡合部1563的外径大于本体部1562的外径，在本实施例中，阀针支撑部154为悬吊卡合部1563，此时，悬吊卡合部1563的外径大于配合部121的内径。
此外，在阀口完全打开等情况下，悬吊卡合部1563与第一挡圈13之间的距离D1大于或者等于悬吊卡合部1563与配合部121上端的距离D2。
D1-D2的距离可以位于0-0.03mm之间。
此时，阀针11可以通过阀针套12悬挂于悬吊卡合部1563，由于阀针11通过阀针套12悬挂于悬吊卡合部1563，阀针11不受到弹簧14产生的弹力载荷。
请具体参考图2，图2为本发明提供的电子膨胀阀第一实施例全开状态时的局部剖视图，电子膨胀阀处于全开状态时，阀针11距离阀口211的行程为L，此时阀针丝杆组件1处于其行程的最上端，弹簧14处于其初始压缩状态，设置在阀针丝杆组件1上的可滑移的弹簧垫圈部13抵靠在下凸缘部1531的上表面，阀针11不受到弹簧11产生的弹力载荷。阀针11通过阀针套12悬挂于悬吊卡合部1563，弹簧垫圈部13的下表面抵靠在下凸缘部1531的上表面，此时弹簧垫圈部13的下表面与配合部121的上表面还有一定量的间隙D1-D2，因此阀针不受到所述弹簧14产生的弹力载荷，此时，阀针11被轴套部件156的悬吊卡合部1563悬吊支撑。
此外，随着转子组件4的转动，丝杆151会沿轴方向发生位移运动，阀针11的阀针密封部111相对于阀口211阀口密封部2111的距离也会发生变化。
请具体参考图3，图3为本发明提供的电子膨胀阀第一实施例阀针与阀口密封部刚接触时的局部剖视图，此时电子膨胀阀从全开状态，到阀针密封部111刚好接触阀口密封部2111，此时阀针11下移的位移量为L，此过程中弹簧11始终处于其初始压缩状态，设置在丝杆151上的下止挡部153始终抵靠在丝杆组件15的下凸缘部1531上，阀针11在此状态下也不受到所述压缩弹簧11产生的弹力载荷，此时第一挡圈13的下表面与阀针套12的配合部121的上表面仍然保持着一定量的间隙D1-D2。
请具体参考图4，图4为本发明提供的电子膨胀阀第一实施例弹簧还没有被进一步压缩的临界点时的局部剖视图。与图3中的状态相比，图4中的丝杆151继续下移了D1-D2的位移量，此时弹簧垫圈部13的下表面与阀针套12的配合部121的上端刚好处于接触的临界点，此时相当于弹簧14处于要被进一步压缩的临界点，也相当于阀针11和阀针套12处于要承受被进一步压缩的压缩弹簧12的弹力载荷的临界点。
请具体参考图5，图5为本发明提供的电子膨胀阀第一实施例全闭状态时的局部剖视图。与图4中的状态相比，图5中的丝杆151下移了α的位移量，此时第一挡圈13的下表面与阀针套12的配合部121已经抵紧，并且弹簧14被进一步压缩，阀针丝杆组件1的阀针密封部2与所述阀座部件2的阀口密封部2111抵触压紧，设置在丝杆151上的弹簧垫圈部13抵靠在阀针套12的配合部121的上表面，阀针11被进一步压缩的弹簧11产生的弹力所载荷。此时，电子膨胀阀处于全闭状态，丝杆151处于其行程的最下端位置，从全开状态到全闭状态丝杆151向下的行程为L+α。
请具体参考图8，图8另一种阀针丝杆组件全开状态时的局部剖视图；该丝杆组件15包括下止挡部153，下止挡部153能够与弹簧垫圈部13相抵，具体的，丝杆组件15包括轴套部件156，轴套部件156包括接孔部1561、本体部1562以及悬吊卡合部1563，该接孔部1561可以为通孔，也可以为盲孔，丝杆151的一端与该接孔部1561可以通过焊接、过盈配合等方式固定连接。
悬吊卡合部1563沿本体部1562的周向延伸，此时，悬吊卡合部1563的外径大于本体部1562的外径，在本实施例中，阀针支撑部154为悬吊卡 合部1563，此时，悬吊卡合部1563的外径大于配合部121的内径，因此，悬吊卡合部1563能够与阀针套12的配合部121相抵。
此外，本阀针丝杆组件1的下止挡部153不再为下凸缘部1531，此时，下止挡部153为轴套部件156的本体部1562，即本实施例中，本体部1562与弹簧垫圈部13能够相抵。
值得说明的是，本发明所述的“能够”是指在特定状态下，而并非指该电子膨胀阀在所有工作状态下，例如，在本实施例中，本体部1562能够与弹簧垫圈部13相抵，是指阀口211在完全打开等情况下。
当然，此时悬吊卡合部1563与第一挡圈13之间的距离D1与悬吊卡合部1563与配合部121上端的距离D2仍然满足D1≥D2。
D1-D2的距离可以位于0-0.03mm之间。
请具体参考图9，图9为另一种阀针丝杆组件全开状态时的局部剖视图。
该丝杆组件15包括阀针支撑部154，阀针支撑部154的上表面能够与阀针套12的配合部121相抵，具体的，丝杆组件15包括阀针支撑垫圈1541，此外，在丝杆151上还设置有阀针支撑凹槽部1512以及阀针支撑凸缘部1513，阀针支撑凹槽部1512沿着丝杆151表面凹陷，于是，位于阀针支撑凹槽部1512下方的阀针支撑凸缘部1513相对于阀针支撑凹槽部1512的周向凸出，阀针支撑垫圈1541装配于阀针支撑凹槽部1512，具体的，阀针支撑垫圈1541与阀针支撑凹槽部1512固定连接或者限位连接。
值得注意的是，对于阀针支撑凸缘部1513的成型方式还可以采用其他的形式，例如，丝杆151不包括阀针支撑凹槽部1512，阀针支撑凸缘部1513可以由丝杆151下端沿其表面周向延伸形成，此时，阀针支撑凸缘部1513仍然可以与阀针支撑垫圈1541相抵。
此时，阀针支撑部154为阀针支撑垫圈1541，阀针支撑垫圈1541的上表面能够与阀针套12的配合部121相抵，在阀口211打开等情况下，阀针11能够通过与之固定连接的阀针套12支撑于阀针支撑垫圈154。
与第一实施例不同的是，本实施例中阀针支撑部154不再为悬吊卡合 部1563，阀针支撑部154为阀针支撑垫圈154，即本实施例中，配合部121与阀针支撑垫圈1541能够相抵。
值得说明的是，本发明所述的“能够”是指在特定状态下，而并非指该电子膨胀阀在所有状态下，例如，在本实施例中，配合部121与阀针支撑垫圈1541能够相抵，是指阀口211在完全打开等情况下。
当然，此时阀针支撑垫圈1541与第一挡圈13之间的距离D1，阀针支撑垫圈1541与配合部121上端的距离D2仍然满足D1≥D2。
为了进一步减小配合部121相对于丝杆151的旋转摩擦阻力，可以在阀针支撑垫圈1541的表面喷涂或镀覆具有润滑耐磨功能的涂层(例如含有聚四氟乙烯，或者含有石墨，或者含有二硫化钼成分的涂层)，从而提高电子膨胀阀的使用寿命。
请具体参考图10，图10为另一种阀针丝杆组件全开状态时的局部剖视图；
该丝杆组件15包括上止挡部155，上止挡部155与弹簧14相抵，具体的，在本实施例中，该丝杆组件15装配有上挡圈1552，另外，丝杆151上还设置有弹簧上环形凹槽1514，弹簧上环形凹槽1514沿着丝杆151表面凹陷，上挡圈1552装配于弹簧上环形凹槽1514，具体的，上挡圈1552与弹簧上环形凹槽1514固定连接或者限位连接，即卡入弹簧上环形凹槽1514内以限位。
该上止挡部155不再为上凸缘部1551，上止挡部155为上挡圈1552，即在本实施例中，上挡圈1552与弹簧14相抵。
此时，弹簧14套装在丝杆151的轴上，弹簧14的上端部与上挡圈1552的下端面相抵。值得说明的是，本发明并不限定上挡圈1552中挡圈的数量，具体的，设置于丝杆151的弹簧上环形凹槽1514上的上挡圈1552，可以由一个开口挡圈构成，也可以在开口挡圈下侧再增加一个或者多个挡圈叠加构成。
当然，此时悬吊卡合部1563与下凸缘部1531之间的距离为D1,悬吊卡合部1563与配合部121上端的距离为D2,仍然满足D1≥D2。
在本实施例中，当阀针11与丝杆151发生相对旋转时，其旋转摩擦面也可能发生在弹簧14上端与上挡圈1552之间，为了进一步减小其相对旋转的摩擦阻力，可以在上述上挡圈1552表面喷涂或镀覆具有润滑耐磨功能的涂层(例如含有聚四氟乙烯，或者含有石墨，或者含有二硫化钼成分的涂层)，从而提高电子膨胀阀的使用寿命。
请具体参考图11，图11为另一种阀针丝杆组件全开状态时的局部剖视图；
该阀针丝杆组件1的弹簧垫圈部13的数量为1个，本实施例说明的是：在本发明中，并不限定弹簧垫圈部13中垫圈的数量。
本实施例提供的电子膨胀阀，其弹簧14外套于丝杆151，且弹簧14的上端与所述上止挡部155相抵，所述弹簧14的下端与所述下止挡部153相抵，弹簧14与该丝杆组件15配合，可以相对降低弹簧14出现偏斜的情况，从而减少偏心磨损。
当然，此时悬吊卡合部1563与弹簧垫圈部13之间的距离为D1,悬吊卡合部1563与配合部121上端的距离为D2,仍然满足D1≥D2。
请具体参考图12，图12为又一种阀针丝杆组件全开状态时的局部剖视图；
该阀针丝杆组件1，其在轴套部件156与阀针套22之间增加了轴套垫圈157。在阀针11不受到所述弹簧14产生的弹力载荷期间，阀针11与阀针套12间隔了轴套垫圈157悬吊在轴套部件156的悬吊卡合部1563上。
此时，阀针支撑部154为轴套垫圈157，轴套垫圈157的上表面与阀针套12的配合部121的下表面能够相抵。
本实施例说明的是：在本发明中，悬吊卡合部1542的上端能够与阀针套12的配合部121相抵，并不是局限于两者直接相抵，还包括两者间接相抵。
当然，此时轴套垫圈157与弹簧垫圈部13之间的距离为D1,轴套垫圈157与配合部121上端的距离为D2,仍然满足D1≥D2。
为了进一步减小阀针套12的配合部121相对于丝杆151的旋转摩擦阻力，优选的可以在轴套垫圈157的表面喷涂或镀覆具有润滑耐磨功能的涂 层(例如含有聚四氟乙烯，或者含有石墨，或者含有二硫化钼成分的涂层)，从而提高电子膨胀阀的使用寿命。
请具体参考图17，图17为另一种阀针丝杆组件的结构示意图；
该阀针丝杆组件1，其阀针11与阀针套12的结构有所变化，其阀针包括台阶部113，阀针套12的周壁部122外套于台阶部113的侧面，并与台阶部113的台阶面抵接，配合部121为自周壁部122内壁向内延伸形成的环形凸起，另外，与上述实施例相比，悬吊卡合部1563位于轴套部件156的上端，更易于与如上形成的配合部121。此时，阀针11与阀针套12可以采用焊接、压接等方式固定连接。
请具体参考图13，图13为发明提供的电子膨胀阀第二实施例全开状态时的局部剖视图；
需要指出的是，本发明目的主要是对电子膨胀阀的丝杆阀针组件1进行改进，对于电子膨胀阀的其他部件，如磁转子组件、丝杆阀针组件、螺母组件、止动装置等部件均可以采用通用的技术，也可以采用其他可以实现相同功能的电子膨胀阀结构。
为了便于描述本实施例，对于本实施例与第一实施例中具有相同结构且具有相同作用的部件采用同一附图标记，第一实施例中各部件的描述同样适用于第三实施例，以下针对与第一实施例不同之处加以详细描述。
例如在本实施例中，其阀座组件2的构造略有不同。阀座组件2由阀座21、第一接管部22、第二接管部23、导向座24组装固定连接而成。本实施例中的螺母部件30通过螺母连接体32固定连接在阀座21的上侧，其固定连接的方式优选的可以采用焊接固定连接的方式。
在本实施例中，阀针11包括阀针上导向段112，阀针11与阀针套12固定连接之后，阀针11与阀针套12的外缘可以同时与导向座24的内壁相配合，此时，阀针11和阀针套12的周壁部122共同限定了外缘导向段16，外缘导向段16位于阀针11的阀针上导向段112和周壁部122的外壁。
当然，当阀针上导向段112与周壁部122的外径存在差异时，与导向座24的内壁相配合的部件也会发生变化，例如，当阀针上导向段112的外壁的内径大于周壁部122的外壁的内径时，仅存在阀针上导向段112与导 向座24导向配合，此时阀针丝杆组件1的引导导正作用由阀针上端向段112与导向座24的内缘导向段2A来保证，此时，阀针上导向段112限定外缘导向段16。
同理，当周壁部122的外壁的内径大于阀针上导向段112的外壁的内径时，仅存在周壁部122与导向座24的导向配合，此时阀针丝杆组件1的引导导正作用由周壁部122与导向座24的内缘导向段2A来保证，此时，周壁部122限定外缘导向段16。
本实施例提供的电子膨胀阀，其弹簧14外套于丝杆151，且弹簧14的上端与所述上止挡部155相抵，所述弹簧14的下端与所述下止挡部153相抵，弹簧14与该丝杆组件15配合，可以相对降低弹簧14出现偏斜的情况，从而减少偏心磨损。
见图14，图14为发明提供的电子膨胀阀第第三实施例全开状态时的局部剖视图；
为了便于描述本实施例，对于本实施例与第一实施例中具有相同结构且具有相同作用的部件采用同一附图标记，第一实施例中各部件的描述同样适用于第三实施例，以下针对与第一实施例不同之处加以详细描述。
在本实施例中，阀座组件2由阀座21、第一接管部12、第二接管部13组装固定连接而成。阀座组件2的阀座21的中心内孔位置设有与阀针丝杆组件1相配合的内孔导向段212，电子膨胀阀进行开闭动作时，阀座21的内孔导向段212为阀针丝杆组件1提供引导导正作用，具体的，阀座21的内孔导向段212与阀针11的外缘和/或阀针套12的周壁部122配合，为阀针丝杆组件1提供导向。
在本实施例中，阀座组件2包括阀座21、第一接管部22以及第二接管部23，第一接管部22、第二接管部23与阀座21固定连接，流体介质能够由第一接管部22通过阀座21从第二接管部23流出，当然，流体介质也可以由第二接管部23流经阀座21再从第一接管部22流出。
此外，阀座21还设有与阀针丝杆组件1相配合的内缘导向段2A，此时，阀座21限定内缘导向段2A。
此时阀针丝杆组件1的引导导正作用由外缘导向段16与阀座21的内 缘导向段2A来保证。
请具体参考图15，图15为发明提供的电子膨胀阀第第四实施例全开状态时的局部剖视图；
为了便于描述本实施例，对于本实施例与第一实施例中具有相同结构且具有相同作用的部件采用同一附图标记，第一实施例中各部件的描述同样适用于第三实施例，以下针对与第一实施例不同之处加以详细描述。
在本实施例中，阀座组件2由阀座21、第一接管部22、第二接管部23、连接座25组装固定连接而成，第一接管部12与连接座25固定连接，第二接管部13与阀座21固定连接。本实施例中的内缘导向部2A，设置于阀座21的阀口211上侧的内孔壁上，该阀座组件2的内孔导向段212为阀针丝杆组件1提供引导导正作用。电子膨胀阀进行开闭动作时，阀针丝杆组件1与阀座部件的内孔导向段10b配合，实现对阀针部的引导导正作用。具体的，阀座21的内孔导向段212与阀针11的外缘和/或阀针套12的周壁部122配合，为阀针丝杆组件1提供导向。
此外，在本实施例中，螺母31还包括螺母导向段311，螺母导向段311外套于阀座21，此时，螺母导向段311的内壁与阀座21的外壁相配合。
需要说明的是，本实施例所提及的上、下、左、右等方位名词，均是以说明书附图作为基准，为便于描述而引入的；以及部件名称中的“第一”、“第二”等序数词，也是为了便于描述而引入的，并不意味着对部件的任何次序作出任何的限定。
以上对本发明所提供的电子膨胀阀进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (12)

  1. 一种电子膨胀阀，其特征在于，包括阀针丝杆组件(1)，所述阀针丝杆组件(1)包括阀针(11)、阀针套(12)以及丝杆组件(15)；
    所述阀针(11)与所述阀针套(12)固定连接，所述阀针套(12)包括周壁部(122)和配合部(121)，所述配合部(121)的内径小于所述周壁部(122)的内径；
    所述丝杆组件(15)包括阀针支撑部(154)，所述阀针支撑部(154)能够与所述阀针套(12)的所述配合部(121)相抵；
    所述阀针丝杆组件(1)还包括外缘导向段(16)，所述电子膨胀阀包括与所述外缘导向段(16)配合的内缘导向段(2A)。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀针(11)包括阀针上导向段(112)，所述外缘导向段(16)至少包括部分所述阀针上导向段(112)和/或至少部分所述阀针套(12)的周壁部(122)的外壁。
  3. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀针(11)包括台阶部(113)，所述台阶部(113)与所述阀针套(12)固定连接，所述外缘导向段(16)至少包括部分所述周壁部(121)的外壁。
  4. 根据权利要求2或3所述的电子膨胀阀，其特征在于，还包括阀座组件(2)，所述阀座组件(2)包括阀座(21)、第一接管部(22)、第二接管部(23)以及导向座(24)，所述导向座(24)与所述阀座(21)固定连接，所述导向座(24)限定所述内缘导向段(2A)，所述第一接管部(22)、第二接管部(23)与所述阀座(21)固定连接。
  5. 根据权利要求4所述的电子膨胀阀，其特征在于，所述阀针(11)还包括阀针下导向段(114)，所述导向座(24)包括与所述阀针下导向段(114)配合的小内缘导向段(241)。
  6. 根据权利要求4所述的电子膨胀阀，其特征在于，还包括螺母组件(3)，所述螺母组件(3)包括螺母(31及螺母连接体(32)，所述螺母(31)与所述螺母连接体(32)固定连接，所述螺母(31)还包括螺母导向段(311)，所述螺母导向段(311)的内壁与所述导向座(24)的外壁配合；
    所述螺母连接体(32)与所述阀座(21)固定连接；
    或，所述阀座组件(2)还包括连接座(25)，所述连接座(25)与所述阀座(21)固定连接，所述螺母连接体(32)与所述连接座(25)固定连接。
  7. 根据权利要求2或3所述的电子膨胀阀，其特征在于，还包括阀座组件(2)，所述阀座组件(2)包括阀座(21)、第一接管部(22)、第二接管部(23)以及连接座(25)，所述连接座(25)与所述阀座(21)固定连接，所述第一接管部(22)、第二接管部(23)与所述连接座(25)固定连接，所述阀座(21)的内壁与所述阀针(11)的外壁配合，所述阀座(21)限定所述内缘导向段(2A)。
  8. 根据权利要求8所述的电子膨胀阀，其特征在于，还包括螺母组件(3)，所述螺母组件(3)包括螺母(31)以及螺母连接体(32)，所述螺母(31)与所述螺母连接体(32)固定连接，所述螺母连接体(32)与所述连接座(25)固定连接，所述螺母(31)还包括螺母导向段(311)，所述螺母导向段(311)的内壁与所述阀座(21)的外壁配合。
  9. 根据权利要求2或3所述的电子膨胀阀，其特征在于，还包括阀座(21)、第一接管部(22)、第二接管部(23)，所述第一接管部(22)、第二接管部(23)与所述阀座(21)固定连接，所述阀座(21)的内壁与所述阀针(11)的外壁配合，所述阀座(21)限定所述内缘导向段(2A)。
  10. 根据权利要求9所述的电子膨胀阀，其特征在于，还包括螺母组件(3)，所述螺母组件(3)包括螺母(31)以及螺母连接体(32)，所述螺母(31)与所述螺母连接体(32)固定连接，所述螺母连接体(32)与所述阀座(21)固定连接。
  11. 根据权利要求2-3任一项所述的电子膨胀阀，其特征在于，所述外缘导向段(16)的内径比所述内缘导向段2A的内径大0.02-0.15mm。
  12. 根据权利要求1-3任一项所述的电子膨胀阀，其特征在于，所述阀针支撑部(154)包括阀针支撑垫圈(1541)或悬吊卡合部(1563)或轴套垫圈(157)，所述阀针支撑垫圈(1541)或所述悬吊卡合部(1563)或所述轴套垫圈(157)能够与所述阀针套(12)的所述配合部(121)相抵。
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