WO2024260477A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

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Publication number
WO2024260477A1
WO2024260477A1 PCT/CN2024/113173 CN2024113173W WO2024260477A1 WO 2024260477 A1 WO2024260477 A1 WO 2024260477A1 CN 2024113173 W CN2024113173 W CN 2024113173W WO 2024260477 A1 WO2024260477 A1 WO 2024260477A1
Authority
WO
WIPO (PCT)
Prior art keywords
stop
screw rod
valve
seat
limit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2024/113173
Other languages
English (en)
French (fr)
Inventor
杨忠宇
蔡培裕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dunan Artificial Environment Co Ltd
Original Assignee
Zhejiang Dunan Artificial Environment Co Ltd
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 Zhejiang Dunan Artificial Environment Co Ltd filed Critical Zhejiang Dunan Artificial Environment Co Ltd
Publication of WO2024260477A1 publication Critical patent/WO2024260477A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
    • F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between 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
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • 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 present application relates to the field of valve body technology, and in particular to an electronic expansion valve.
  • the electronic expansion valve has already broken through the concept of throttling mechanism. It is an important part of the intelligentization of the refrigeration system, an important means and guarantee for the real realization of the optimization of the refrigeration system, and a symbol of the mechatronics of the refrigeration system. It has been applied in more and more fields.
  • the electronic expansion valve When the valve core is in contact with the valve port, the electronic expansion valve is in a closed state. At this time, if the valve core does not have sufficient pre-tightening force to close the valve port, good sealing between the valve core and the valve port cannot be guaranteed, resulting in leakage of the electronic expansion valve.
  • the present application provides an electronic expansion valve including a stop seat, a rotor assembly, a screw rod and a valve seat assembly, wherein the valve seat assembly is provided with a valve mouth portion; the electronic expansion valve also includes a first elastic member, one end of the first elastic member is directly or indirectly connected to the stop seat, and the other end is directly or indirectly connected to the screw rod, when the screw rod moves in a direction from the valve mouth portion to the rotor assembly, the first elastic member can generate an elastic pre-tightening force on the screw rod from the rotor assembly toward the valve mouth portion.
  • the electronic expansion valve further includes a first limit member and a second limit member, one of the first limit member and the second limit member is fixedly connected to the stop seat, and the other is fixedly connected to the screw rod.
  • the first elastic member is a compression spring, and the first elastic member is sleeved on the outer side of the screw rod.
  • the first limit member is fixedly connected to the inner wall of the stop seat
  • the second limit member is fixedly connected to the outer wall of the screw rod
  • the end of the first elastic member away from the valve mouth abuts against the first limit member
  • the end of the first elastic member close to the valve mouth abuts against the second limit member
  • the outer wall of the screw rod is provided with a first rod body step, and the first rod body step constitutes the second limiting member.
  • a first seat body step is provided on the inner wall of the stop seat, a first stop portion is provided on a side of the stop seat away from the valve mouth, and the first limiting member is provided between the first stop portion and the first seat body step.
  • a first connecting insert is provided on the top of the stop seat, and the first stopping portion is connected to the first connecting insert.
  • the first limit member is fixedly connected to the outer wall of the screw rod
  • the second limit member is fixedly connected to the inner wall of the stop seat
  • one end of the first elastic member close to the valve mouth abuts against the first limit member
  • one end of the first elastic member away from the valve mouth abuts against the second limit member.
  • it also includes a limit ring, which is fixedly sleeved on the outside of the screw rod and stopped at the end of the first limit member away from the valve mouth; the inner wall of the stop seat is provided with a first seat body step, and the first limit member is arranged between the limit ring and the first seat body step.
  • a first stop portion is provided on a side of the stop seat away from the valve mouth portion, and the first stop portion constitutes the second limiting member.
  • a first connecting insert is provided on the top of the stop seat, and the first stop portion is connected to the first connecting insert.
  • a valve core assembly and a stop ring are further included, and the stop seat is further provided with a second stop portion. When the stop ring stops at the second stop portion, the valve core assembly abuts against the valve port portion and closes the valve port portion.
  • a valve core assembly which includes a sliding nut and a valve needle assembly.
  • the sliding nut includes a main body and a connecting portion.
  • the main body is an injection molded part.
  • the sliding nut cooperates with the stop seat or valve seat assembly through the main body.
  • One end of the connecting portion is fixedly connected to the main body, and the other end is connected to the valve needle assembly.
  • the electronic expansion valve also includes a stop structure, which is arranged on the inner wall of the stop seat, and the stop structure can abut against the side of the screw rod to prevent the screw rod from moving from the rotor assembly to the valve mouth portion; one end of the first elastic member close to the valve mouth portion abuts against the screw rod, and one end of the first elastic member away from the valve mouth portion abuts against the stop seat, and the first elastic member is in a compressed state.
  • the first elastic member in the compressed state can generate an elastic stopping force on the screw rod from the rotor assembly to the valve mouth portion.
  • it also includes a limiting ring, which is fixedly sleeved on the outside of the screw rod, and the stopping structure includes a first limiting member, one end of the first limiting member is fixedly provided on the inner wall of the stop seat, and the other end extends along the radial direction of the stop seat toward the direction close to the screw rod, and the first limiting member stops at one end of the limiting ring close to the valve mouth part, one end of the first elastic member away from the valve mouth part stops at the first limiting member, and one end of the first elastic member close to the valve mouth part stops at the outer wall of the screw rod.
  • the stop structure further includes a first seat body step disposed on an inner wall of the stop seat, and the first seat body step stops at an end of the first limiting member close to the valve mouth.
  • a first rod step is disposed on an outer wall of the screw rod, one end of the first elastic member abuts against the first rod step, and the other end of the first elastic member abuts against the first limit member.
  • the rotor assembly includes a magnetic rotor and a connecting piece, wherein the magnetic rotor is sleeved on the outer side of the stop seat and fixedly connected to the end of the screw rod away from the valve mouth through the connecting piece; the limiting ring is clamped between the first limiting piece and the connecting piece.
  • the first limit member is a bearing member
  • the outer ring of the bearing of the first limit member is fixedly connected to the inner wall of the stop seat
  • the inner ring of the bearing of the first limit member is movably sleeved on the outer wall of the screw rod, and the screw rod is guided and matched with the inner ring of the bearing of the first limit member.
  • the outer wall of the screw rod is fixedly sleeved with a first limiter
  • the stop structure includes a second seat body step provided on the inner wall of the stop seat, the second seat body step stops at one end of the first limiter close to the valve mouth portion to prevent the screw rod from moving toward the valve mouth portion, the end of the stop seat away from the valve mouth portion is provided with a first stop portion, the end of the first elastic member close to the valve mouth portion stops at the first limiter, and the end of the first elastic member away from the valve mouth portion stops at the first stop portion.
  • it also includes a limiter collar, the limiter collar is fixedly sleeved on the outside of the screw rod, the outer wall of the screw rod is also provided with a third rod body step, and the first limiter is fixedly clamped between the limiter collar and the third rod body step.
  • the first limiting member is a bearing member, and the inner ring of the bearing of the first limiting member is fixedly connected to the outer wall of the screw rod, and the outer ring of the bearing of the first limiting member is guided and matched with the inner wall of the stop seat.
  • the electronic expansion valve further includes a first stopper, wherein the first stopper is a bearing member, the outer ring of the bearing of the first stopper is limited to the inner wall of the stop seat, and the inner ring of the bearing of the first stopper is stopped at the outer wall of the screw rod to prevent the screw rod from moving toward the valve mouth; one end of the first elastic member close to the valve mouth is in contact with the screw rod, and the first elastic member One end away from the valve port is in contact with the inner ring of the first limiting member.
  • the first stopper is a bearing member
  • the outer ring of the bearing of the first stopper is limited to the inner wall of the stop seat
  • the inner ring of the bearing of the first stopper is stopped at the outer wall of the screw rod to prevent the screw rod from moving toward the valve mouth
  • one end of the first elastic member close to the valve mouth is in contact with the screw rod
  • the first elastic member One end away from the valve port is in contact with the inner ring of the first limiting member.
  • a first stop portion is provided at one end of the stop seat away from the valve mouth, and a bearing outer ring of the first limiting member is embedded between the first stop portion and the stop seat.
  • the stop seat includes a stop body and a first connecting insert
  • the stop body is an injection molded part
  • one end of the first connecting insert is embedded in the stop body, and the other end is welded to the first stop portion.
  • the stop seat further includes a second connecting insert, one end of the second connecting insert is embedded in the stop body, and the other end is welded to the valve seat assembly.
  • the electronic expansion valve also includes a first limit member, which is a bearing member.
  • the inner ring of the bearing of the first limit member is fixedly connected to the outer wall of the screw rod, and the outer ring of the bearing of the first limit member stops at the inner wall of the stop seat to prevent the screw rod from moving toward the valve mouth.
  • One end of the first elastic member 610 close to the valve mouth 410 abuts against the outer ring of the bearing of the first limit member 220, and the end of the first elastic member away from the valve mouth directly or indirectly stops at the inner wall of the stop seat.
  • a first stop portion is provided on the side of the stop seat away from the valve mouth portion, and the first stop portion constitutes the second limiting member; optionally, the first stop portion includes an annular fixing ring, the inner side of the annular fixing ring is arranged around the circumference of the screw rod, and the outer ring of the annular fixing ring is fixedly connected to the inner wall of the stop seat.
  • the stop seat includes a stop body and a first connecting insert, the stop body is an injection molded part, one end of the first connecting insert is embedded in the stop body, and the other end is welded to the annular fixing ring.
  • the stop seat supports the screw rod and the rotor assembly, the screw rod rotates in place with the rotor assembly, and the screw rod does not move along the axial direction.
  • the screw rod drives the valve core assembly to close the valve mouth, the rotor assembly continues to rotate, and the screw rod continues to rotate relative to the valve core assembly.
  • the valve core assembly has abutted against the valve mouth, the valve core assembly cannot continue to move toward the valve mouth.
  • the screw rod moves in the direction away from the valve mouth, and a first elastic member is provided between the screw rod and the stop seat, and the first elastic member is a compression elastic member.
  • the first elastic member will continue to be compressed in the process of the screw rod moving away from the valve mouth. At this time, the first elastic member will in turn apply a force to the screw rod toward the valve mouth, thereby increasing the extrusion force of the valve core assembly on the valve mouth, achieving a pre-tightening effect on the valve mouth, and preventing leakage between the valve core assembly and the valve mouth.
  • FIG. 1 is a schematic diagram of a partial structure of an electronic expansion valve according to an embodiment of the present application.
  • FIG. 2 is a cross-sectional view of an electronic expansion valve according to an embodiment of the present application.
  • FIG3 is a cross-sectional view of an electronic expansion valve according to another embodiment of the present application.
  • FIG4 is a cross-sectional view of an electronic expansion valve according to another embodiment of the present application.
  • FIG5 is a schematic diagram of a partial structure of an electronic expansion valve according to an embodiment of the present application.
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first” and “second” may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality” is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • installed can be a fixed connection, a detachable connection, or an integral connection
  • it can be a mechanical connection or an electrical connection
  • it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • the specific meanings of the above terms in this application can be understood according to specific circumstances.
  • a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.
  • a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • a first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
  • the electronic expansion valve includes a stop seat 510, a rotor assembly 100, a screw rod 200, a valve core assembly 300 and a valve seat assembly 400.
  • the stop seat 510 is fixedly connected to the valve seat assembly 400, and the stop seat 510 is arranged on the outer periphery of the screw rod 200.
  • the valve seat assembly 400 is provided with a valve mouth portion 410.
  • the valve core assembly 300 can move axially relative to the valve seat assembly 400 along the screw rod 200.
  • One end of the screw rod 200 is fixedly connected to the rotor assembly 100, and the other end is connected to the valve core assembly 300.
  • the rotor assembly 100 can drive the valve core assembly 300 to move toward or away from the valve mouth portion 410 through the screw rod 200.
  • the electronic expansion valve also includes a first limit member 220, a second limit member 230 and a first elastic member 610, one of the first limit member 220 and the second limit member 230 is fixedly connected to the stop seat 510, and the other is fixedly connected to the screw rod 200, one end of the first elastic member 610 is connected to the first limit member 220, and the other end is connected to the second limit member 230, when the screw rod 200 moves along the direction from the valve mouth portion 410 to the rotor assembly 100, the first elastic member 610 can generate an elastic pre-tightening force on the screw rod 200 from the rotor assembly 100 to the valve mouth portion 410.
  • the electronic expansion valve further includes a stop ring 520 and a guide rod 530.
  • the outer peripheral side of the stop seat 510 away from the screw rod 200 is also provided with an outer guide rail portion.
  • the stop ring 520 is sleeved on the outer periphery of the stop seat 510 and movably cooperates with the outer guide rail portion.
  • the outer peripheral side of the stop seat 510 away from the screw rod 200 is provided with an external thread portion 511.
  • the stop ring 520 is sleeved on the outer periphery of the stop seat 510 and movably cooperates with the external thread portion 511.
  • the guide rod 530 is fixedly connected to the rotor assembly 100 or the screw rod 200, so that the rotor assembly 100 can drive the guide rod 530 to push the stop ring 520 to spirally move along the external thread portion 511.
  • the screw rod 200 and the valve core assembly 300 are movably threaded.
  • the stop seat 510 supports the screw rod 200 and the rotor assembly 100, and the screw rod 200 rotates in place with the rotor assembly 100, and the screw rod 200 does not move along the axial direction.
  • the screw rod 200 drives the valve core assembly 300 to close the valve mouth 410, the rotor assembly 100 continues to rotate, and the screw rod 200 continues to rotate relative to the valve core assembly 300.
  • the valve core assembly 300 has abutted against the valve mouth 410, the valve core assembly 300 cannot continue to move toward the valve mouth 410.
  • the screw rod 200 moves in the direction away from the valve mouth 410, and due to the limiting effect of the first limit member 220 and the second limit member 230, a first elastic member 610 is clamped between the screw rod 200 and the stop seat 510, and the first elastic member 610 is a compression elastic member. Therefore, the first elastic member 610 will continue to be compressed during the process of the lead screw 200 moving away from the valve mouth portion 410.
  • the first elastic member 610 will in turn apply a force to the lead screw 200 toward the valve mouth portion 410, thereby increasing the squeezing pressure of the valve core assembly 300 on the valve mouth portion 410, achieving a pre-tightening effect on the valve mouth portion 410, and preventing loosening and leakage between the valve core assembly 300 and the valve mouth portion 410.
  • the electronic expansion valve further includes a first stopper 220 and a first elastic member 610.
  • the first stopper 220 is a bearing member.
  • the outer ring of the bearing of the first stopper 220 is limited to the inner wall of the stop seat 510.
  • the inner ring of the bearing of the first stopper 220 is stopped at the outer wall of the screw rod 200 to prevent the screw rod 200 from moving toward the valve mouth 410.
  • One end of the first elastic member 610 close to the valve mouth 410 abuts against the screw rod 200, and one end of the first elastic member 610 away from the valve mouth 410 abuts against the inner ring of the first stopper 220.
  • the first elastic member 610 can generate an elastic preload force on the screw rod 200 from the rotor assembly 100 to the valve mouth 410.
  • the electronic expansion valve further includes a stop ring 520 and a guide rod 530
  • the outer peripheral side of the stop seat 510 away from the screw rod 200 is provided with an external threaded portion 511
  • the stop ring 520 is sleeved on the outer periphery of the stop seat 510 and is movably threaded with the external threaded portion 511
  • the guide rod 530 is fixedly connected to the rotor assembly 100 or the screw rod 200, so that the rotor assembly 100 can drive the guide rod 530 to push the stop ring 520 to move along the external threaded portion 511.
  • the electronic expansion valve further includes a housing 800, which is covered on the outer side of the rotor assembly 100, part of the screw rod 200 and part of the valve core assembly 300 and is welded to the valve seat assembly 400.
  • the screw rod 200 and the valve core assembly 300 are movably threaded.
  • the screw rod 200 drives the valve core assembly 300 to close the valve port 410, the rotor assembly 100 continues to rotate, and the screw rod 200 continues to rotate relative to the valve core assembly 300. However, since the valve core assembly 300 has abutted against the valve port 410, the valve core assembly 300 cannot continue to move toward the valve port 410. At this time, under the push of the reaction force, the screw rod 200 moves in the direction away from the valve port 410, and since the first elastic member 610 is a limiting member of the compression elastic member, the screw rod 200 will continue to compress the first elastic member 610 during the process of moving away from the valve port 410.
  • the first elastic member 610 will in turn apply a force to the screw rod 200 toward the valve port 410, thereby increasing the extrusion force of the valve core assembly 300 on the valve port 410, achieving a pre-tightening effect on the valve port 410, and preventing the valve core assembly 300 and the valve port 410 from loosening and leaking.
  • the electronic expansion valve also includes a limit ring 210, which is fixedly sleeved on the outside of the screw rod 200, and the limit ring 210 stops at the end of the first limit member 220 away from the valve mouth 410.
  • the screw rod 200 Since the limiting ring 210 is fixedly mounted on the outside of the screw rod 200 and stopped at the end of the first limiting member 220 away from the valve mouth portion 410, the screw rod 200 cannot move toward the direction close to the valve mouth portion 410 under the limiting action of the limiting ring 210. In this way, the screw rod 200 cannot apply a pre-tightening force to the connection between the valve core assembly 300 and the valve mouth portion 410 by moving itself toward the direction close to the valve mouth portion 410. That is, the screw rod 200 can only apply a pre-tightening force to the connection between the valve core assembly 300 and the valve mouth portion 410 by compressing the first elastic member 610.
  • the electronic expansion valve further includes The second position-limiting member 230 is fixedly connected to the outer wall of the screw rod 200 , and one end of the first elastic member 610 close to the valve opening 410 abuts against the second position-limiting member 230 .
  • the stopper seat 510 is provided with a first stopper portion 540 for limiting the moving distance of the valve core assembly 300 toward the end away from the valve port portion 410, and the outer ring of the bearing of the first limiter 220 is embedded between the first stopper portion 540 and the stopper seat 510.
  • the stopper seat 510 includes a stopper body 512 and a first connecting insert 513, the stopper body 512 is an injection molded part, one end of the first connecting insert 513 is embedded in the stopper body 512, and the other end is welded to the first stopper portion 540; further, in one embodiment, the stopper seat 510 also includes a second connecting insert 514, one end of the second connecting insert 514 is embedded in the stopper body 512, and the other end is welded to the valve seat assembly 400.
  • the electronic expansion valve further includes a first stopper 220 and a first elastic member 610, wherein the first stopper 220 is a bearing member, wherein the inner ring of the bearing of the first stopper 220 is fixedly connected to the outer wall of the screw rod 200, and the outer ring of the bearing of the first stopper 220 is stopped at the inner wall of the stop seat 510 to prevent the screw rod 200 from moving toward the valve mouth portion 410.
  • One end of the first elastic member 610 close to the valve mouth portion 410 abuts against the first stopper 220, and one end of the first elastic member 610 away from the valve mouth portion 410 is directly or indirectly stopped at the inner wall of the stop seat 510.
  • the first elastic member 610 can generate an elastic preload force on the screw rod 200 in the direction from the rotor assembly 100 to the valve mouth portion 410.
  • the electronic expansion valve further includes a stop ring 520 and a guide rod 530.
  • the outer peripheral side of the stop seat 510 away from the screw rod 200 is provided with an external threaded portion 511.
  • the stop ring 520 is sleeved on the outer periphery of the stop seat 510 and is movably threaded with the external threaded portion 511.
  • the guide rod 530 is fixedly connected to the rotor assembly 100 or the screw rod 200, so that the rotor assembly 100 can drive the guide rod 530 to push the stop ring 520 to move along the external threaded portion 511.
  • the screw rod 200 and the valve core assembly 300 are movably threaded.
  • the screw rod 200 drives the valve core assembly 300 to close the valve port 410, the rotor assembly 100 continues to rotate, and the screw rod 200 continues to rotate relative to the valve core assembly 300. However, since the valve core assembly 300 has abutted against the valve port 410, the valve core assembly 300 cannot continue to move toward the valve port 410. At this time, under the push of the reaction force, the screw rod 200 moves in the direction away from the valve port 410, and since the first elastic member 610 is a limiting member of the compression elastic member, the screw rod 200 will continue to compress the first elastic member 610 during the process of moving away from the valve port 410.
  • the first elastic member 610 will in turn apply a force to the screw rod 200 toward the valve port 410, thereby increasing the extrusion force of the valve core assembly 300 on the valve port 410, achieving a pre-tightening effect on the valve port 410, and preventing the valve core assembly 300 and the valve port 410 from loosening and leaking.
  • the electronic expansion valve also includes a limit ring 210, which is fixedly sleeved on the outside of the screw rod 200, and the limit ring 210 stops at the end of the first limit member 220 away from the valve mouth 410.
  • the screw rod 200 Since the limiting ring 210 is fixedly mounted on the outside of the screw rod 200 and stopped at the end of the first limiting member 220 away from the valve mouth portion 410, the screw rod 200 cannot move toward the direction close to the valve mouth portion 410 under the limiting action of the limiting ring 210. In this way, the screw rod 200 cannot apply a pre-tightening force to the connection between the valve core assembly 300 and the valve mouth portion 410 by moving itself toward the direction close to the valve mouth portion 410. That is, the screw rod 200 can only apply a pre-tightening force to the connection between the valve core assembly 300 and the valve mouth portion 410 by compressing the first elastic member 610.
  • the first limit member 220 is a bearing member, and the outer ring of the bearing of the first limit member 220 is fixedly connected to the inner wall of the stop seat 510, the inner ring of the bearing of the first limit member 220 is movably sleeved on the outer wall of the screw rod 200, and the screw rod 200 is guided and matched with the inner ring of the bearing of the first limit member 220.
  • the guiding fit is a clearance fit, and the guide fit between the screw rod 200 and the inner ring of the bearing of the first limit member 220 can prevent the screw rod 200 from being deflected.
  • the first limit member 220 is a bearing member, and the inner ring of the bearing of the first limit member 220 is fixedly connected to the outer wall of the screw rod 200 , and the outer ring of the bearing of the first limit member 220 and the inner wall of the stop seat 510 are guided and matched.
  • the guiding fit is a clearance fit, and the guiding fit between the outer ring of the bearing of the first limiting member 220 and the inner wall of the stop seat 510 can prevent the screw rod 200 from being deflected.
  • the electronic expansion valve also includes a stop structure and a first elastic member 610.
  • the stop structure is arranged on the inner wall of the stop seat 510, and the stop structure can abut against the side of the screw rod 200 to prevent the screw rod 200 from moving from the rotor assembly 100 toward the valve mouth portion 410; one end of the first elastic member 610 close to the valve mouth portion 410 abuts against the screw rod 200, and one end of the first elastic member 610 away from the valve mouth portion 410 abuts against the stop seat 510, and the first elastic member 610 is in a compressed state.
  • the compressed first elastic member 610 can generate an elastic stopping force on the screw rod 200 from the rotor assembly 100 toward the valve mouth portion 410.
  • the screw rod 200 Under the stopping action of the stopping structure, the screw rod 200 can be prevented from moving from the rotor assembly 100 to the valve opening 410.
  • the first elastic member 610 can generate an elastic stopping force on the screw rod 200 from the rotor assembly 100 to the valve opening 410. Therefore, under the two-way stopping action of the stopping structure and the first elastic member 610, the screw rod 200 can only rotate relative to the stop seat 510, and cannot move along the axial direction of the stop seat 510.
  • the screw rod 200 and the valve core assembly 300 are movably threaded.
  • the axial limit of the screw rod 200 by the stop structure is a hard limit, so it can effectively ensure that the screw rod 200 cannot break through the limit of the stop structure, and the axial limit of the screw rod 200 by the first elastic member 610 is a soft limit.
  • the screw rod 200 can break through the limit of the first elastic member 610 to a certain extent.
  • Such a setting compared with the hard limit at both ends of the screw rod 200, one end is hard limited and the other end is soft limited, which can make the screw rod 200 offset the excessive axial force through the limited axial displacement, prevent the screw rod 200 from excessive wear, and increase the service life of the screw rod 200.
  • the electronic expansion valve further includes a housing 800 , which covers the outer sides of the rotor assembly 100 , a part of the lead screw 200 and a part of the valve core assembly 300 and is welded to the valve seat assembly 400 .
  • the first elastic member 610 is a compression spring, and the first elastic member 610 is sleeved on the outer side of the screw rod 200 .
  • the valve core assembly 300 includes a sliding nut 310 and a valve needle assembly 320, and one end of the screw rod 200 away from the rotor assembly 100 is threadedly matched with the sliding nut 310, and the sliding nut 310 and the stop seat 510 are matched through a limiting structure, so that the screw rod 200 can drive the sliding nut 310 to drive the valve core assembly 300 to move axially relative to the stop seat 510 along the screw rod 200 to open or close the valve mouth 410, and the limiting structure can prevent the sliding nut 310 from rotating around the axis of the screw rod 200 relative to the stop seat 510.
  • the sliding nut 310 can be prevented from rotating relative to the stop seat 510 around the axis of the screw rod 200. At this time, the sliding nut 310 can move relative to the screw rod 200 along the axial direction of the screw rod 200, so that the screw rod 200 drives the sliding nut 310 to drive the valve core assembly 300 to open or close the valve port 410. The relative rotation between the sliding nut 310 and the stop seat 510 is prevented to cause the sliding nut 310 and the stop seat 510 to wear.
  • the sliding nut 310 includes a main body 314 and a connecting portion 315, the main body 314 is an injection molded part, the connecting portion 315 is a metal part, the sliding nut 310 is threadedly connected to the screw rod 200 through the main body 314, the sliding nut 310 cooperates with the stop seat 510 or the valve seat assembly 400 through the main body 314, one end of the connecting portion 315 is fixedly connected to the main body 314, and the other end is welded to the valve needle assembly 320.
  • the main body 314 is an injection molded part, which can significantly reduce the weight of the sliding nut 310 and reduce the difficulty of processing the sliding nut 310.
  • the connecting part 315 is a metal part, which is conducive to welding the valve needle assembly 320 through the connecting part 315 of the sliding nut 310, thereby improving the connection strength between the sliding nut 310 and the valve needle assembly 320.
  • the same sliding nut 310 can be matched with valve needle assemblies 320 of different specifications, that is, only one sliding nut 310 needs to be made to adapt to valve needle assemblies 320 of different specifications.
  • the first limit member 220 is fixedly connected to the inner wall of the stop seat 510
  • the second limit member 230 is fixedly connected to the outer wall of the screw rod 200
  • the first limit member 220 is arranged at one end of the first elastic member 610 away from the valve mouth portion 410
  • the second limit member 230 is arranged at one end of the first elastic member 610 close to the valve mouth portion 410.
  • the outer wall of the screw rod 200 is provided with a first rod body step 240 , and the first rod body step 240 constitutes the second limiting member 230 .
  • the first limit member 220 is a bearing member, and the outer ring of the bearing of the first limit member 220 is fixedly connected to the inner wall of the stop seat 510, and the inner ring of the bearing of the first limit member 220 is movably sleeved on the outer wall of the screw rod 200, so that the screw rod 200 can drive the inner ring of the bearing of the first limit member 220 to rotate synchronously, and the screw rod 200 can move along its own axial direction relative to the inner ring of the bearing of the first limit member 220.
  • the bearing member is a special type of shaft connection member.
  • the screw rod 200 can drive the inner ring of the bearing of the first limit member 220 to rotate synchronously.
  • the stop seat 510 can provide a limiting effect on the screw rod 200 through the bearing member to ensure the coaxiality of the screw rod 200 and the stop seat 510 and avoid eccentricity of the screw rod 200.
  • the first limit member 220 as a bearing member, sliding friction between the screw rod 200 and the stop seat 510 is effectively prevented.
  • the bearing inner ring of the first stopper 220 is not fixed to the outer wall of the screw rod 200.
  • the screw rod 200 can move along its own axial direction relative to the bearing inner ring of the first stopper 220. That is, there is a certain friction between the screw rod 200 and the bearing inner ring of the first stopper 220. The friction can drive the bearing inner ring of the first stopper 220 to rotate synchronously.
  • the first stopper 220 will not limit the movement of the screw rod 200.
  • the valve core assembly 300 blocks the valve port 410
  • the valve core assembly 300 will not continue to move if the screw rod 200 continues to rotate.
  • the screw rod 200 can compress the first elastic member 610 in a direction away from the valve port 410, so that the first elastic member 610 applies a pre-tightening force to the connection between the valve core assembly 300 and the valve port 410.
  • the valve core assembly 300 includes a sliding nut 310, a first valve needle 321, and a second valve needle 322 that are connected to each other.
  • the end of the screw rod 200 away from the rotor assembly 100 is threadedly matched with the sliding nut 310, and the sliding nut 310 and the stop seat 510 are slidably matched along the axial direction of the screw rod 200, so that the screw rod 200 can drive the sliding nut 310 to drive the second valve needle 322 to open or close the valve port 410 through the first valve needle 321, and the second valve needle 322 is provided with a regulating valve port 3221 that can communicate with the valve port 410.
  • the end of the screw rod 200 away from the rotor assembly 100 is threadedly matched with the sliding nut 310, and the sliding nut 310 and the stop seat 510 are matched through a limiting structure.
  • the stop seat 510 is fixedly connected to the valve seat assembly 400.
  • the arrangement of the sliding nut 310 and the stopper 510 can reduce the magnitude of the impact force transmitted to the first position limiting member 220.
  • one end of the first elastic member 610 away from the valve opening portion 410 abuts against the inner ring of the bearing of the first limiting member 220 .
  • the first elastic member 610, the inner ring of the bearing of the first limit member 220, the screw rod 200 and the rotor assembly 100 can rotate synchronously, and no sliding friction occurs between the first elastic member 610 and the inner ring of the bearing of the first limit member 220, thereby reducing the wear between the screw rod 200, the first elastic member 610 and the first limit member 220, and improving the service life of the electronic expansion valve.
  • the outer ring of the bearing of the first limiting member 220 is embedded in the inner wall of the stop seat 510. Specifically, the outer ring of the bearing of the first limiting member 220 is embedded in the stop seat 510 by integral injection molding.
  • the outer ring of the bearing of the first limiting member 220 is clamped and embedded in the inner wall of the stopping seat 510 .
  • the outer ring of the bearing of the first limiting member 220 is bonded and embedded in the inner wall of the stopping seat 510 .
  • the first limiting member 220 is a metal member, and the bearing outer ring of the first limiting member 220 and the stop seat 510 can be welded, bonded or threadedly connected.
  • a first seat step 518 is provided on the inner wall of the stop seat 510
  • a first stopper 540 is provided on the side of the stop seat 510 away from the valve mouth 410
  • the first limiting member 220 is disposed between the first stopper 540 and the first seat step 518 .
  • a first connecting insert 513 is disposed on the top of the stopping seat 510 , and the first stopping portion 540 is connected to the first connecting insert 513 .
  • the stop seat 510 is further provided with a second stop portion 550 .
  • the valve core assembly 300 abuts against the valve port 410 and closes the valve port 410 .
  • the movement stroke of the stop ring 520 in the external threaded portion 511 can be effectively limited, thereby limiting the rotation angle range of the guide rod 530 relative to the stop seat 510. Since the guide rod 530 is fixedly connected to the rotor assembly 100 or the screw rod 200, such a configuration can effectively limit the rotation angle range of the rotor assembly 100, thereby controlling the movement stroke of the valve core assembly 300 relative to the valve port 410, avoiding wear of the valve core assembly 300 and the valve port 410, and reducing the impact force of the valve core assembly 300 on the valve port 410 when closing the valve. In addition, such a configuration can also prevent the stop ring 520 from moving to the area outside the external threaded portion 511, thereby affecting the thread fit between the stop ring 520 and the stop seat 510.
  • the first limit member 220 is fixedly connected to the outer wall of the screw rod 200
  • the second limit member 230 is fixedly connected to the inner wall of the stop seat 510
  • the first limit member 220 is arranged at one end of the first elastic member 610 close to the valve mouth portion 410
  • the second limit member 230 is arranged at one end of the first elastic member 610 away from the valve mouth portion 410.
  • a first stopper 540 is provided on one side of the stopper seat 510 away from the valve mouth 410.
  • the first stopper 540 can stop the stop ring 520, or the first stopper 540 constitutes the second limiter 230.
  • the stop ring 520 stops at the first stopper 540 the valve core assembly 300 and the valve mouth 410 are spaced apart and stop moving.
  • the first stop portion 540 can stop the stop ring 520 and form the second limit member 230 at the same time. In this way, the first stop portion 540 can simultaneously realize the functions of stopping the stop ring 520 and the first elastic member 610, simplifying the structure of the electronic expansion valve and improving the structural integration of the electronic expansion valve.
  • the first stop portion 540 includes an annular fixing ring 541 and a stop ridge 542.
  • the inner side of the annular fixing ring 541 is arranged around the circumference of the screw rod 200, and the outer ring of the annular fixing ring 541 is fixedly connected to the inner wall of the stop seat 510.
  • the stop seat 510 is provided with a notch corresponding to the stop ridge 542.
  • One end of the stop ridge 542 is connected to the outer ring of the annular fixing ring 541, and the other end passes through the notch along the radial direction of the stop seat 510 and protrudes from the outer side surface of the stop seat 510.
  • the first limit member 220 is a bearing member, and the inner ring of the bearing of the first limit member 220 is fixedly connected to the outer wall of the screw rod 200, and the outer ring of the bearing of the first limit member 220 is movably inserted into the inner wall of the stop seat 510, so that the screw rod 200 can drive the outer ring of the bearing of the first limit member 220 to move along its own axial direction relative to the stop seat 510, and the inner wall of the stop seat 510 can limit the rotation of the outer ring of the bearing of the first limit member 220.
  • the bearing member is a special type of shaft connection member.
  • the screw rod 200 can drive the inner ring of the bearing of the first limit member 220 to rotate synchronously.
  • the stop seat 510 can provide a limiting effect on the screw rod 200 through the bearing member to ensure the coaxiality of the screw rod 200 and the stop seat 510 and avoid eccentricity of the screw rod 200.
  • the first limit member 220 as a bearing member, sliding friction between the screw rod 200 and the stop seat 510 is effectively prevented.
  • the outer ring of the bearing of the first stopper 220 is not fixed to the inner wall of the stopper 510.
  • the screw rod 200 can drive the outer ring of the bearing of the first stopper 220 to move along its own axial direction relative to the stopper 510.
  • the first stopper 220 will not restrict the movement of the screw rod 200. More specifically, when the valve core assembly 300 blocks the valve port 410, if the screw rod 200 continues to rotate, the valve core assembly 300 will not continue to move. At this time, the screw rod 200 can compress the first elastic member 610 in a direction away from the valve port 410, so that the first elastic member 610 applies a pre-tightening force to the connection between the valve core assembly 300 and the valve port 410.
  • one end of the first elastic member 610 close to the valve opening 410 abuts against the outer ring of the bearing of the first limiting member 220 .
  • the first elastic member 610, the outer ring of the bearing of the first limiting member 220 and the stop seat 510 will not rotate synchronously with the screw rod 200. No sliding friction occurs between the first elastic member 610 and the outer ring of the bearing of the first limit member 220, thereby reducing the wear between the stop seat 510, the first elastic member 610 and the first limit member 220, and improving the service life of the electronic expansion valve.
  • the first limiting member 220 is a metal member, and the inner ring of the bearing of the first limiting member 220 and the screw rod 200 can be welded, bonded or threadedly connected.
  • the inner ring of the bearing of the first limiting member 220 is embedded in the outer wall of the screw rod 200 .
  • the inner ring of the bearing of the first limiting member 220 is injection-molded and embedded in the outer wall of the screw rod 200 .
  • the inner ring of the bearing of the first limiting member 220 is clamped and embedded in the outer wall of the screw rod 200 .
  • the inner ring of the bearing of the first limiting member 220 is bonded and embedded in the outer wall of the screw rod 200 .
  • the inner ring of the bearing of the first limiter 220 is embedded in the outer wall of the screw rod 200.
  • the inner ring of the bearing of the first limiter 220 is embedded in the screw rod 200 by integral injection molding.
  • the electronic expansion valve also includes a limiting ring 210, which is fixedly sleeved on the outer side of the screw rod 200, and a first seat body step 518 is provided on the inner wall of the stop seat 510, and a first limiting member 220 is provided between the limiting ring 210 and the first seat body step 518.
  • the stop seat 510 is further provided with a second stop portion 550 .
  • the valve core assembly 300 abuts against the valve port 410 and closes the valve port 410 .
  • the movement stroke of the stop ring 520 in the external threaded portion 511 can be effectively limited, thereby limiting the rotation angle range of the guide rod 530 relative to the stop seat 510. Since the guide rod 530 is fixedly connected to the rotor assembly 100 or the screw rod 200, such a configuration can effectively limit the rotation angle range of the rotor assembly 100, thereby controlling the movement stroke of the valve core assembly 300 relative to the valve port 410, avoiding wear of the valve core assembly 300 and the valve port 410, and reducing the impact force of the valve core assembly 300 on the valve port 410 when closing the valve. In addition, such a configuration can also prevent the stop ring 520 from moving to the area outside the external threaded portion 511, thereby affecting the thread fit between the stop ring 520 and the stop seat 510.
  • the stop seat 510 includes a stop body 512 and a first connecting insert 513 .
  • the stop body 512 is an injection molded part.
  • One end of the first connecting insert 513 is embedded in the stop body 512 , and the other end is welded to the annular fixing ring 541 .
  • annular fixing ring 541 is disposed on a side of the stop seat 510 away from the valve opening 410 , and the annular fixing ring 541 directly constitutes the second limiting member 230 .
  • a first matching portion 5101 is fixedly provided at one end of the stopper 510 away from the valve mouth portion 410 and is matched with the movable guide of the screw rod 200.
  • the first matching portion 5101 and the stopper 510 are integrally formed, and the inner wall of the first matching portion 5101 is matched with the outer wall of the screw rod 200 for movable guidance.
  • a second matching portion 5102 is fixedly provided at one end of the stopper 510 close to the valve mouth portion 410 and is matched with the movable limit of the screw rod 200, and the second matching portion 5102 and the stopper 510 are separately formed.
  • the first matching portion 5101 it is helpful to improve the coaxiality of the screw rod 200 and the stop seat 510 .
  • the second matching portion 5102 and the stop seat 510 are separately provided, which is helpful for assembling the screw rod 200 in the stop seat 510 .
  • the second matching portion 5102 stops at one end of the first stopper 220 close to the valve opening 410 to prevent the first stopper 220 from moving toward the valve opening 410.
  • one end of the first elastic member 610 abuts against the first matching portion 5101, and the other end abuts against the first stopper 220.

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  • Thermal Sciences (AREA)
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Abstract

一种电子膨胀阀。该电子膨胀阀包括止动座(510)、转子组件(100)、丝杆(200)以及阀座组件(400)，阀座组件(400)设有阀口部(410)。电子膨胀阀还包括第一弹性件(610)，第一弹性件(610)一端直接或间接连接止动座(510)，另一端直接或间接连接丝杆(200)，当丝杆(200)沿着从阀口部(410)到转子组件(100)的方向移动时，第一弹性件(610)能够对丝杆(200)产生自转子组件(100)向阀口部(410)方向的弹性预紧力。

Description

电子膨胀阀
相关申请
本申请要求2023年6月19日申请的，申请号为202321595997.0，名称为“电子膨胀阀”的中国专利申请的优先权，2023年11月30日申请的，申请号为202311631561.7，名称为“电子膨胀阀”的中国专利申请的优先权，2023年11月30日申请的，申请号为202311633139.5，名称为“电子膨胀阀”的中国专利申请的优先权，2023年11月30日申请的，申请号为202323273080.1，名称为“电子膨胀阀”的中国专利申请的优先权，以及2023年11月30日申请的，申请号为202323270079.3，名称为“电子膨胀阀”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及阀体技术领域，特别是涉及一种电子膨胀阀。
背景技术
电子膨胀阀作为一种新型的控制元件，早已经突破了节流机构的概念，它是制冷系统智能化的重要环节，也是制冷系统优化得以真正实现的重要手段和保证，也是制冷系统机电一体的象征，已经被应用在越来越多的领域中。
当阀芯抵接于阀口部时，电子膨胀阀处于关闭状态，此时，如果阀芯没有足够的预紧力关闭阀口，无法保证阀芯和阀口部之间具有较好的密封性，导致电子膨胀阀发生泄漏。
发明内容
基于此，有必要提供一种电子膨胀阀，解决阀芯和阀口部之间容易发生松脱，导致电子膨胀阀发生泄漏的问题。
本申请提供了一种电子膨胀阀包括止动座、转子组件、丝杆以及阀座组件，所述阀座组件设有阀口部；所述电子膨胀阀还包括第一弹性件，所述第一弹性件一端直接或间接连接所述止动座，另一端连接直接或间接连接所述丝杆，当所述丝杆沿着从所述阀口部到所述转子组件的方向移动时，所述第一弹性件能够对所述丝杆产生自所述转子组件向所述阀口部方向的弹性预紧力。
在一些实施例中，所述电子膨胀阀还包括第一限位件和第二限位件，所述第一限位件和所述第二限位件中的一者固定连接于止动座，另一者固定连接于所述丝杆。
在一些实施例中，所述第一弹性件为压缩弹簧，且所述第一弹性件套设于所述丝杆的外侧。
在一些实施例中，所述第一限位件固定连接于所述止动座的内壁，所述第二限位件固定连接于所述丝杆的外壁，且所述第一弹性件远离所述阀口部的一端抵接于第一限位件，所述第一弹性件靠近所述阀口部的一端抵接于第二限位件。
在一些实施例中，所述丝杆的外壁设有第一杆体台阶，所述第一杆体台阶构成所述第二限位件。
在一些实施例中，所述止动座内壁设有第一座体台阶，所述止动座远离所述阀口部的一侧设有第一止挡部，所述第一限位件设于所述第一止挡部和所述第一座体台阶之间。
在一些实施例中，所述止动座的顶部设有第一连接嵌件，所述第一止挡部与所述第一连接嵌件连接。
在一些实施例中，所述第一限位件固定连接于所述丝杆的外壁，所述第二限位件固定连接于所述止动座的内壁，所述第一弹性件靠近所述阀口部的一端抵接于第一限位件，所述第一弹性件远离所述阀口部的一端抵接于第二限位件。
在一些实施例中，还包括限位套环，所述限位套环固定套设于所述丝杆的外侧，且所述限位套环止挡于所述第一限位件远离所述阀口部的一端；所述止动座内壁设有第一座体台阶，所述第一限位件设于所述限位套环和所述第一座体台阶之间。
在一些实施例中，所述止动座远离所述阀口部的一侧设有第一止挡部，所述第一止挡部构成所述第二限位件。
在一些实施例中，所述止动座的顶部设有第一连接嵌件，所述第一止挡部与所述第一连接嵌件连接。在一些实施例中，还包括阀芯组件和止动环，所述止动座还设有第二止挡部，当所述止动环止挡于所述第二止挡部时，所述阀芯组件与所述阀口部抵接并关闭所述阀口部。
在一些实施例中，还包括阀芯组件，所述阀芯组件包括滑动螺母和阀针组件，所述滑动螺母包括主体部和连接部，所述主体部为注塑件，所述滑动螺母通过所述主体部与所述止动座或阀座组件配合，所述连接部一端固定连接于所述主体部，另一端连接于所述阀针组件。
在一些实施例中，所述电子膨胀阀还包括止挡结构，所述止挡结构设于所述止动座的内壁，所述止挡结构能够抵接于所述丝杆的侧部，以阻止所述丝杆自所述转子组件向所述阀口部的方向移动；所述第一弹性件靠近所述阀口部的一端抵接于所述丝杆，所述第一弹性件远离所述阀口部的一端抵接于所述止动座，且所述第一弹性件为压缩状态，当所述丝杆自所述阀口部向所述转子组件的方向移动时，压缩状态的所述第一弹性件能够对所述丝杆产生自所述转子组件向所述阀口部方向的弹性止挡力。
在一些实施例中，还包括限位套环，所述限位套环固定套设于所述丝杆外侧，所述止挡结构包括第一限位件，所述第一限位件一端固设于所述止动座的内壁，另一端沿着所述止动座的径向朝向靠近所述丝杆的方向延伸，且所述第一限位件止挡于所述限位套环靠近所述阀口部的一端，所述第一弹性件远离所述阀口部的一端止挡于所述第一限位件，所述第一弹性件靠近所述阀口部的一端止挡于所述丝杆的外壁。
在一些实施例中，所述止挡结构还包括设于所述止动座内壁的第一座体台阶，所述第一座体台阶止挡于所述第一限位件靠近所述阀口部的一端。
在一些实施例中，所述丝杆的外壁设有第一杆体台阶，所述第一弹性件一端抵接于所述第一杆体台阶，另一端抵接于所述第一限位件。
在一些实施例中，所述转子组件包括磁转子和连接件，所述磁转子套设于所述止动座的外侧并通过所述连接件固定连接所述丝杆远离所述阀口部的一端；所述限位套环卡设于所述第一限位件和所述连接件之间。
在一些实施例中，所述第一限位件为轴承件，并且，所述第一限位件的轴承外圈固定连接于所述止动座的内壁，所述第一限位件的轴承内圈活动套设于所述丝杆的外壁，且所述丝杆与所述第一限位件的轴承内圈导向配合。
在一些实施例中，所述丝杆的外壁固定套设有第一限位件，所述止挡结构包括设于所述止动座内壁的第二座体台阶，所述第二座体台阶止挡于所述第一限位件靠近所述阀口部的一端，以阻止所述丝杆朝向所述阀口部移动，所述止动座远离所述阀口部的一端设有第一止挡部，所述第一弹性件靠近所述阀口部的一端止挡于所述第一限位件，所述第一弹性件远离所述阀口部的一端止挡于所述第一止挡部。在一些实施例中，还包括限位套环，所述限位套环固定套设于所述丝杆外侧，所述丝杆的外壁还设有第三杆体台阶，所述第一限位件固定卡设于所述限位套环和所述第三杆体台阶之间。
在一些实施例中，所述第一限位件为轴承件，并且，所述第一限位件的轴承内圈固定连接于所述丝杆的外壁，所述第一限位件的轴承外圈和所述止动座的内壁导向配合。
在一些实施例中，其中所述电子膨胀阀还包括第一限位件所述第一限位件为轴承件，所述第一限位件的轴承外圈限位于所述止动座的内壁，所述第一限位件的轴承内圈止挡于所述丝杆的外壁，以阻止所述丝杆朝向所述阀口部移动；所述第一弹性件靠近所述阀口部的一端与所述丝杆抵接，所述第一弹性件 远离所述阀口部的一端与所述第一限位件内圈抵接。
在一些实施例中，所述止动座设远离所述阀口部的一端设有第一止挡部，所述第一限位件的轴承外圈嵌设于所述第一止挡部与所述止动座之间。
在一些实施例中，所述止动座包括止动主体和第一连接嵌件，所述止动主体为注塑成型件，所述第一连接嵌件一端嵌设于所述止动主体，另一端与所述第一止挡部焊接。
在一些实施例中，所述止动座还包括第二连接嵌件，所述第二连接嵌件一端嵌设于止动主体，另一端焊接于所述阀座组件。
在一些实施例中，所述电子膨胀阀还包括第一限位件，所述第一限位件为轴承件，所述第一限位件的轴承内圈固定连接于所述丝杆的外壁，所述第一限位件的轴承外圈止挡于所述止动座的内壁，以阻止所述丝杆朝向所述阀口部移动，所述第一弹性件610靠近所述阀口部410的一端抵接于所述第一限位件220的轴承外圈，所述第一弹性件远离所述阀口部的一端直接或者间接止挡于所述止动座的内壁。
在一些实施例中，所述止动座远离所述阀口部的一侧设有第一止挡部，所述第一止挡部构成所述第二限位件；可选地，所述第一止挡部包括环形固定圈，所述环形固定圈的内侧围设于所述丝杆的周侧，且所述环形固定圈的外圈固定连接于所述止动座的内壁。
在一些实施例中，所述止动座包括止动主体和第一连接嵌件，所述止动主体为注塑成型件，所述第一连接嵌件一端嵌设于所述止动主体，另一端与所述环形固定圈焊接。
与现有技术相比，丝杆正常工作时，止动座支撑丝杆与转子组件，丝杆随转子组件原地转动，丝杆沿着轴向不移动。当丝杆驱动阀芯组件关闭阀口部时，继续转动转子组件，则丝杆继续相对阀芯组件转动，但是，由于阀芯组件已经抵接于阀口部，因此，阀芯组件无法继续朝向阀口部移动。此时，在反作用力的推动下，丝杆朝向远离阀口部的方向移动，并且丝杆和止动座之间卡设有第一弹性件，且第一弹性件为压缩弹性件。因此，丝杆朝向远离阀口部移动的过程中将会继续压缩第一弹性件，此时，第一弹性件反过来将会对丝杆施加朝向靠近阀口部的作用力，从而使得阀芯组件对阀口部的挤压力增大，实现对阀口部预紧作用，防止阀芯组件和阀口部之间发生泄漏。
附图说明
为了更清楚地说明本申请实施例或传统技术中的技术方案，下面将对实施例或传统技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据公开的附图获得其他的附图。
图1为本申请提供的一实施例的电子膨胀阀的局部结构示意图。
图2为本申请提供的一实施例的电子膨胀阀的剖视图。
图3为本申请提供的另一实施例的电子膨胀阀的剖视图。
图4为本申请提供的又一实施例的电子膨胀阀的剖视图。
图5为本申请提供的一实施例的电子膨胀阀的局部结构示意图。
附图标记：100、转子组件；110、磁转子；120、连接件；200、丝杆；210、限位套环；220、第一限位件；230、第二限位件；240、第一杆体台阶；250、第二杆体台阶；260、第三杆体台阶；300、阀芯组件；310、滑动螺母；314、主体部；315、连接部；320、阀针组件；321、第一阀针；322、第二阀针；3221、调节阀口；400、阀座组件；410、阀口部；510、止动座；511、外螺纹部；5101、第一配合部；5102、第二配合部；512、止动主体；513、第一连接嵌件；514、第二连接嵌件；518、第一座体台阶；519、第二座体台阶；520、止动环；530、导向杆；540、第一止挡部；541、环形固定圈；542、止挡凸条；550、第二止挡部；610、第一弹性件；800、壳体。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1-图5，在一实施例中，电子膨胀阀包括止动座510、转子组件100、丝杆200、阀芯组件300以及阀座组件400，止动座510固定连接于阀座组件400，且止动座510设置于丝杆200的外周，阀座组件400设有阀口部410，阀芯组件300能够相对阀座组件400沿着丝杆200的轴向移动，丝杆200的一端固定连接于转子组件100，另一端与阀芯组件300连接，且转子组件100能够通过丝杆200驱动阀芯组件300朝向靠近或远离阀口部410的方向移动。
在一些实施例中，电子膨胀阀还包括第一限位件220、第二限位件230和第一弹性件610，第一限位件220和第二限位件230中的一者固定连接于止动座510，另一者固定连接于丝杆200，第一弹性件610一端连接第一限位件220，另一端连接第二限位件230，当丝杆200沿着从阀口部410到转子组件100的方向移动时，第一弹性件610能够对丝杆200产生自转子组件100向阀口部410方向的弹性预紧力。
具体地，电子膨胀阀还包括止动环520以及导向杆530，止动座510背离丝杆200的外周侧还设有外导轨部，止动环520套设于止动座510的外周并与外导轨部活动配合。具体为止动座510背离丝杆200的外周侧设有外螺纹部511，止动环520套设于止动座510的外周并与外螺纹部511活动螺纹配合，导向杆530固定连接于转子组件100或丝杆200，以使转子组件100能够驱动导向杆530推动止动环520沿着外螺纹部511螺旋运动。并且，丝杆200和阀芯组件300活动螺纹配合。
丝杆200正常工作时，止动座510支撑丝杆200与转子组件100，丝杆200随转子组件100原地转动，丝杆200沿着轴向不移动。当丝杆200驱动阀芯组件300关闭阀口部410时，继续转动转子组件100，则丝杆200继续相对阀芯组件300转动，但是，由于阀芯组件300已经抵接于阀口部410，因此，阀芯组件300无法继续朝向阀口部410移动。此时，在反作用力的推动下，丝杆200朝向远离阀口部410的方向移动，并且，由于第一限位件220和第二限位件230的限位作用，丝杆200和止动座510之间卡设有第一弹性件610，且第一弹性件610为压缩弹性件。因此，丝杆200朝向远离阀口部410移动的过程中将会继续压缩第一弹性件610，此时，第一弹性件610反过来将会对丝杆200施加朝向靠近阀口部410的作用力，从而使得阀芯组件300对阀口部410的挤压力增大，实现对阀口部410预紧作用，防止阀芯组件300和阀口部410之间发生松脱和泄漏。
在一些实施例中,电子膨胀阀还包括第一限位件220和第一弹性件610，第一限位件220为轴承件，第一限位件220的轴承外圈限位于止动座510的内壁，第一限位件220的轴承内圈止挡于丝杆200的外壁，以阻止丝杆200朝向阀口部410移动。第一弹性件610靠近阀口部410的一端与丝杆200抵接，第一弹性件610远离阀口部410的一端与第一限位件220内圈抵接，当丝杆200沿着从阀口部410到转子组件100的方向移动时，第一弹性件610能够对丝杆200产生自转子组件100向阀口部410方向的弹性预紧力。
具体地，电子膨胀阀还包括止动环520以及导向杆530，止动座510背离丝杆200的外周侧设有外螺纹部511，止动环520套设于止动座510的外周并与外螺纹部511活动螺纹配合，导向杆530固定连接于转子组件100或丝杆200，以使转子组件100能够驱动导向杆530推动止动环520沿着外螺纹部511螺旋运动。并且，电子膨胀阀还包括壳体800，壳体800罩设于转子组件100、部分丝杆200以及部分阀芯组件300的外侧并焊接于阀座组件400。并且，丝杆200和阀芯组件300活动螺纹配合。
当丝杆200驱动阀芯组件300关闭阀口部410时，继续转动转子组件100，则丝杆200继续相对阀芯组件300转动，但是，由于阀芯组件300已经抵接于阀口部410，因此，阀芯组件300无法继续朝向阀口部410移动。此时，在反作用力的推动下，丝杆200朝向远离阀口部410的方向移动，并且，由于第一弹性件610为压缩弹性件的限位作用，丝杆200朝向远离阀口部410移动的过程中将会继续压缩第一弹性件610，此时，第一弹性件610反过来将会对丝杆200施加朝向靠近阀口部410的作用力，从而使得阀芯组件300对阀口部410的挤压力增大，实现对阀口部410预紧作用，防止阀芯组件300和阀口部410之间发生松脱和泄漏。
为便于第一限位件220内圈支撑丝杆200，在一实施例中，电子膨胀阀还包括限位套环210，限位套环210固定套设于丝杆200外侧，且限位套环210止挡于第一限位件220远离阀口部410的一端。
由于限位套环210固定套设于丝杆200外侧，并止挡于第一限位件220远离阀口部410的一端，因此，在限位套环210的限制作用下，丝杆200不能朝向靠近阀口部410的方向移动，如此，丝杆200不能通过自身朝向靠近阀口部410的方向移动的方式对阀芯组件300和阀口部410的连接处施加预紧力，也即，丝杆200只能通过压缩第一弹性件610的方式对阀芯组件300和阀口部410的连接处施加预紧力。
为便于第一弹性件610靠近阀口部410的一端与丝杆200抵接，在一实施例中，电子膨胀阀还包括 第二限位件230，第二限位件230固定连接于丝杆200的外壁，第一弹性件610靠近阀口部410的一端抵接于第二限位件230。
在一实施例中，止动座510设有用于限制阀芯组件300朝向远离阀口部410一端移动距离的第一止挡部540，第一限位件220的轴承外圈嵌设于第一止挡部540与止动座510之间。止动座510包括止动主体512和第一连接嵌件513，止动主体512为注塑成型件，第一连接嵌件513一端嵌设于止动主体512，另一端焊接于第一止挡部540；进一步地，在一实施例中，止动座510还包括第二连接嵌件514，第二连接嵌件514一端嵌设于止动主体512，另一端焊接于阀座组件400。
在一些实施例中，电子膨胀阀还包括第一限位件220和第一弹性件610，第一限位件220为轴承件，第一限位件220的轴承内圈固定连接于丝杆200的外壁，第一限位件220的轴承外圈止挡于止动座510的内壁，以阻止丝杆200朝向阀口部410移动。第一弹性件610靠近阀口部410的一端抵接于第一限位件220，第一弹性件610远离阀口部410的一端直接或者间接止挡于止动座510的内壁。当丝杆200沿着从阀口部410到转子组件100的方向移动时，第一弹性件610能够对丝杆200产生自转子组件100向阀口部410方向的弹性预紧力。
具体地，电子膨胀阀还包括止动环520以及导向杆530，止动座510背离丝杆200的外周侧设有外螺纹部511，止动环520套设于止动座510的外周并与外螺纹部511活动螺纹配合，导向杆530固定连接于转子组件100或丝杆200，以使转子组件100能够驱动导向杆530推动止动环520沿着外螺纹部511螺旋运动。并且，丝杆200和阀芯组件300活动螺纹配合。
当丝杆200驱动阀芯组件300关闭阀口部410时，继续转动转子组件100，则丝杆200继续相对阀芯组件300转动，但是，由于阀芯组件300已经抵接于阀口部410，因此，阀芯组件300无法继续朝向阀口部410移动。此时，在反作用力的推动下，丝杆200朝向远离阀口部410的方向移动，并且，由于第一弹性件610为压缩弹性件的限位作用，丝杆200朝向远离阀口部410移动的过程中将会继续压缩第一弹性件610，此时，第一弹性件610反过来将会对丝杆200施加朝向靠近阀口部410的作用力，从而使得阀芯组件300对阀口部410的挤压力增大，实现对阀口部410预紧作用，防止阀芯组件300和阀口部410之间发生松脱和泄漏。
为便于第一限位件220内圈支撑丝杆200，在一实施例中，电子膨胀阀还包括限位套环210，限位套环210固定套设于丝杆200外侧，且限位套环210止挡于第一限位件220远离阀口部410的一端。
由于限位套环210固定套设于丝杆200外侧，并止挡于第一限位件220远离阀口部410的一端，因此，在限位套环210的限制作用下，丝杆200不能朝向靠近阀口部410的方向移动，如此，丝杆200不能通过自身朝向靠近阀口部410的方向移动的方式对阀芯组件300和阀口部410的连接处施加预紧力，也即，丝杆200只能通过压缩第一弹性件610的方式对阀芯组件300和阀口部410的连接处施加预紧力。
在一些实施例中，所述第一限位件220为轴承件，并且，所述第一限位件220的轴承外圈固定连接于所述止动座510的内壁，所述第一限位件220的轴承内圈活动套设于所述丝杆200的外壁，且所述丝杆200与所述第一限位件220的轴承内圈导向配合。
在本实施例中，导向配合为间隙活动配合，丝杆200与第一限位件220的轴承内圈导向配合，可以避免丝杆200出现偏斜。
在一些实施例中，所述第一限位件220为轴承件，并且，所述第一限位件220的轴承内圈固定连接于所述丝杆200的外壁，所述第一限位件220的轴承外圈和所述止动座510的内壁导向配合。
在本实施例中，导向配合为间隙活动配合，所述第一限位件220的轴承外圈和所述止动座510的内壁导向配合，可以避免丝杆200出现偏斜。
在一些实施例中，电子膨胀阀还包括止挡结构和第一弹性件610，止挡结构设于止动座510的内壁，止挡结构能够抵接于丝杆200的侧部，以阻止丝杆200自转子组件100向阀口部410的方向移动；第一弹性件610靠近阀口部410的一端抵接于丝杆200，第一弹性件610远离阀口部410的一端抵接于止动座510，且第一弹性件610为压缩状态，当丝杆200自阀口部410向转子组件100的方向移动时，压缩状态的第一弹性件610能够对丝杆200产生自转子组件100向阀口部410方向的弹性止挡力。
在止挡结构的止挡作用下，能够阻止丝杆200自转子组件100向阀口部410的方向移动。又因为第一弹性件610能够对丝杆200产生自转子组件100向阀口部410方向的弹性止挡力。因此，在止挡结构和第一弹性件610的双向止挡作用下，丝杆200只能相对止动座510进行转动，而无法沿着止动座510的轴向移动。
在一些实施例中，丝杆200和阀芯组件300活动螺纹配合。
需要注意的是，止挡结构对丝杆200的轴向限位是硬限制，如此，能够有效保证丝杆200无法突破止挡结构的限制作用，第一弹性件610对丝杆200的轴向限位是软限制，当丝杆200受到的轴向作用力足够大时，丝杆200是能够在一定程度上突破第一弹性件610的限位作用的。如此设置，相对于丝杆200两端均为硬限位作用，一端硬限制，另一端软限制，能够使得丝杆200通过轴向的有限位移抵消受到的过大的轴向作用力，防止丝杆200过度磨损，提高了丝杆200的使用寿命。
电子膨胀阀还包括壳体800，壳体800罩设于转子组件100、部分丝杆200以及部分阀芯组件300的外侧并焊接于阀座组件400。
在一实施例中，第一弹性件610为压缩弹簧，且第一弹性件610套设于丝杆200的外侧。
如此，显著降低了第一弹性件610的加工难度，且降低了第一弹性件610和丝杆200的装配难度。
在一实施例中，阀芯组件300包括滑动螺母310和阀针组件320，丝杆200远离转子组件100的一端和滑动螺母310螺纹配合，滑动螺母310和止动座510通过限位结构相配合，以使丝杆200能够驱动滑动螺母310带动阀芯组件300相对止动座510沿着丝杆200的轴向移动，以打开或者关闭阀口部410，且限位结构能够阻止滑动螺母310相对止动座510围绕丝杆200的轴线转动。
通过设置限位结构，可阻止滑动螺母310相对止动座510围绕丝杆200的轴线转动，此时，滑动螺母310能够相对丝杆200沿着丝杆200的轴向移动，以便于丝杆200驱动滑动螺母310带动阀芯组件300打开或者关闭阀口部410。防止滑动螺母310和止动座510之间相对转动导致滑动螺母310和止动座510磨损。
进一步地，在一实施例中，滑动螺母310包括主体部314和连接部315，主体部314为注塑件，连接部315为金属件，滑动螺母310通过主体部314螺纹连接于丝杆200，滑动螺母310通过主体部314与止动座510或阀座组件400配合，连接部315一端固定连接于主体部314，另一端焊接于阀针组件320。
主体部314为注塑件，能够显著减轻滑动螺母310的重量，并降低滑动螺母310的加工难度。连接部315为金属件，有利于滑动螺母310通过连接部315焊接阀针组件320，提高了滑动螺母310和阀针组件320的连接强度。并且，如此设置，同一滑动螺母310可与不同规格的阀针组件320相匹配，也即，只需要制作一个滑动螺母310，可适配不同规格的阀针组件320。
实施例一
在本实施例中，第一限位件220固定连接于止动座510的内壁，第二限位件230固定连接于丝杆200的外壁，且第一限位件220设于第一弹性件610远离阀口部410的一端，第二限位件230设于第一弹性件610靠近阀口部410的一端。
在本实施例中，丝杆200的外壁设有第一杆体台阶240，第一杆体台阶240构成第二限位件230。
如此，简化了第二限位件230和丝杆200的装配，提高了第二限位件230和丝杆200的连接牢固程度。
在本实施例中，第一限位件220为轴承件，并且，第一限位件220的轴承外圈固定连接于止动座510的内壁，第一限位件220的轴承内圈活动套设于丝杆200的外壁，以使丝杆200能够带动第一限位件220的轴承内圈同步转动，且丝杆200能够相对第一限位件220的轴承内圈沿着自身轴向移动。
可以理解的是，轴承件为一类较为特殊的轴类连接件，当第一限位件220为轴承件时，丝杆200能够带动第一限位件220的轴承内圈同步转动，如此，止动座510能够通过轴承件对丝杆200提供限位作用，以保证丝杆200和止动座510的同轴度，避免丝杆200发生偏心。并且，通过设置第一限位件220为轴承件，有效防止了丝杆200和止动座510之间发生滑动摩擦。
进一步地，在本实施例中，第一限位件220的轴承内圈并非固定在丝杆200的外壁，具体地，丝杆200能够相对第一限位件220的轴承内圈沿着自身轴向移动，也即，丝杆200和第一限位件220的轴承内圈之间存在一定的摩擦力，该摩擦力能够带动第一限位件220的轴承内圈同步转动，但是，当丝杆200需要克服第一弹性件610的弹力作用进行轴向移动时，第一限位件220不会限制丝杆200的移动。具体地，当阀芯组件300封堵阀口部410时，继续转动丝杆200，则阀芯组件300不会继续移动，此时，丝杆200能够朝向远离阀口部410的方向压缩第一弹性件610，以使第一弹性件610对阀芯组件300和阀口部410的连接处施加预紧力作用。
阀芯组件300包括相互连接的滑动螺母310、第一阀针321和第二阀针322。丝杆200远离转子组件100的一端和滑动螺母310螺纹配合，且滑动螺母310和止动座510沿着丝杆200的轴向滑动配合，以使丝杆200能够驱动滑动螺母310通过第一阀针321带动第二阀针322打开或者关闭阀口部410，第二阀针322设有能够连通阀口部410的调节阀口3221。丝杆200远离转子组件100的一端和滑动螺母310螺纹配合，滑动螺母310和止动座510通过限位结构相配合。止动座510固定连接于阀座组件400。
当第一阀针321撞击调节阀口3221或第二阀针322撞击阀口部410时均会具有一定的撞击力，撞击力经过滑动螺母310、止动座510消减后传递给第一限位件220，避免破坏第一限位件220。因此，滑动螺母310和止动座510的设置可减少传递给第一限位件220的撞击力大小。
进一步地，在本实施例中，第一弹性件610远离阀口部410的一端抵接于第一限位件220的轴承内圈。
如此，第一弹性件610、第一限位件220的轴承内圈、丝杆200和转子组件100能够同步转动，第一弹性件610和第一限位件220的轴承内圈之间不会发生滑动摩擦，进而减小了丝杆200、第一弹性件610和第一限位件220之间的磨损，提高了电子膨胀阀的使用寿命。
在本实施例中，第一限位件220的轴承外圈嵌设于止动座510的内壁，具体地，第一限位件220的轴承外圈通过一体注塑成型的方式嵌入止动座510。
在另一实施例中，第一限位件220的轴承外圈卡接嵌设于止动座510的内壁。
在又一实施例中，第一限位件220的轴承外圈粘接嵌设于止动座510的内壁。
或者，在其他实施例中，第一限位件220为金属件，且第一限位件220的轴承外圈和止动座510可以是焊接、粘接或者螺纹连接。
在本实施例中，止动座510内壁设有第一座体台阶518，止动座510远离阀口部410的一侧设有第一止挡部540，第一限位件220设于第一止挡部540和第一座体台阶518之间。
在本实施例中，止动座510的顶部设有第一连接嵌件513，第一止挡部540与第一连接嵌件513连接。
在一实施例中，止动座510还设有第二止挡部550，当止动环520止挡于第二止挡部550时，阀芯组件300与阀口部410抵接并关闭阀口部410。
通过设置第一止挡部540和第二止挡部550，能够有效限制止动环520在外螺纹部511的移动行程，从而限制导向杆530相对止动座510的转动角度范围，由于导向杆530固定连接于转子组件100或丝杆200，因此，如此设置，能够有效限制转子组件100的转动角度范围，进而控制阀芯组件300相对阀口部410的移动行程，避免阀芯组件300和阀口部410发生磨损，并且，能够减小关阀时，阀芯组件300对阀口部410的撞击力。并且，如此设置，还能够避免止动环520移动至外螺纹部511之外的区域，而影响止动环520和止动座510的螺纹配合。
实施例二
在本实施例中，第一限位件220固定连接于丝杆200的外壁，第二限位件230固定连接于止动座510的内壁，且第一限位件220设于第一弹性件610靠近阀口部410的一端，第二限位件230设于第一弹性件610远离阀口部410的一端。
止动座510远离阀口部410的一侧设有第一止挡部540。第一止挡部540可对止动环520进行止挡，或者，第一止挡部540构成第二限位件230。当止动环520止挡于第一止挡部540时，阀芯组件300和阀口部410间隔设置并停止移动。
第一止挡部540可同时对止动环520进行止挡且构成第二限位件230，如此，可使第一止挡部540同时实现止挡止动环520和第一弹性件610的作用，简化了电子膨胀阀的结构，并提高了电子膨胀阀的结构集成度。
具体地，在本实施例中，第一止挡部540包括环形固定圈541和止挡凸条542，环形固定圈541的内侧围设于丝杆200的周侧，且环形固定圈541的外圈固定连接于止动座510的内壁，止动座510对应止挡凸条542设有缺口，止挡凸条542一端连接于环形固定圈541的外圈，另一端沿着止动座510的径向穿过缺口并凸出于止动座510的外侧面。
在本实施例中，第一限位件220为轴承件，并且，第一限位件220的轴承内圈固定连接于丝杆200的外壁，第一限位件220的轴承外圈活动插置于止动座510的内壁，以使丝杆200能够带动第一限位件220的轴承外圈相对止动座510沿着自身轴向移动，且止动座510的内壁能够限制第一限位件220轴承外圈的转动。
可以理解的是，轴承件为一类较为特殊的轴类连接件，当第一限位件220为轴承件时，丝杆200能够带动第一限位件220的轴承内圈同步转动，如此，止动座510能够通过轴承件对丝杆200提供限位作用，以保证丝杆200和止动座510的同轴度，避免丝杆200发生偏心。并且，通过设置第一限位件220为轴承件，有效防止了丝杆200和止动座510之间发生滑动摩擦。
进一步地，在本实施例中，第一限位件220的轴承外圈并非固定在止动座510的内壁，具体地，丝杆200能够带动第一限位件220的轴承外圈相对止动座510沿着自身轴向移动，当丝杆200需要克服第一弹性件610的弹力作用进行轴向移动时，第一限位件220不会限制丝杆200的移动。更具体地，当阀芯组件300封堵阀口部410时，继续转动丝杆200，则阀芯组件300不会继续移动，此时，丝杆200能够朝向远离阀口部410的方向压缩第一弹性件610，以使第一弹性件610对阀芯组件300和阀口部410的连接处施加预紧力作用。
进一步地，在本实施例中，第一弹性件610靠近阀口部410的一端抵接于第一限位件220的轴承外圈。
如此，第一弹性件610、第一限位件220的轴承外圈和止动座510均不会随着丝杆200同步转动， 第一弹性件610和第一限位件220的轴承外圈之间不会发生滑动摩擦，进而减小了止动座510、第一弹性件610和第一限位件220之间的磨损，提高了电子膨胀阀的使用寿命。
在本实施例中，第一限位件220为金属件，且第一限位件220的轴承内圈和丝杆200可以是焊接、粘接或者螺纹连接。
或者，在其他实施例中，第一限位件220的轴承内圈嵌设于丝杆200的外壁。
进一步地，在一实施例中，第一限位件220的轴承内圈注塑嵌设于丝杆200的外壁。
在另一实施例中，第一限位件220的轴承内圈卡接嵌设于丝杆200的外壁。
在又一实施例中，第一限位件220的轴承内圈粘接嵌设于丝杆200的外壁。
或者，在其他实施例中，第一限位件220的轴承内圈嵌设于丝杆200的外壁，具体地，第一限位件220的轴承内圈通过一体注塑成型的方式嵌入丝杆200。
在本实施例中，电子膨胀阀还包括限位套环210，限位套环210固定套设于丝杆200的外侧，止动座510内壁设有第一座体台阶518，第一限位件220设于限位套环210和第一座体台阶518之间。
在一实施例中，止动座510还设有第二止挡部550，当止动环520止挡于第二止挡部550时，阀芯组件300与阀口部410抵接并关闭阀口部410。
通过设置第一止挡部540和第二止挡部550，能够有效限制止动环520在外螺纹部511的移动行程，从而限制导向杆530相对止动座510的转动角度范围，由于导向杆530固定连接于转子组件100或丝杆200，因此，如此设置，能够有效限制转子组件100的转动角度范围，进而控制阀芯组件300相对阀口部410的移动行程，避免阀芯组件300和阀口部410发生磨损，并且，能够减小关阀时，阀芯组件300对阀口部410的撞击力。并且，如此设置，还能够避免止动环520移动至外螺纹部511之外的区域，而影响止动环520和止动座510的螺纹配合。
进一步地，在一实施例中，止动座510包括止动主体512和第一连接嵌件513，止动主体512为注塑成型件，第一连接嵌件513一端嵌设于止动主体512，另一端与环形固定圈541焊接。
在另一实施例中，止动座510远离阀口部410的一侧设有环形固定圈541，环形固定圈541直接构成第二限位件230。
实施例三
在一实施例中，如图4所示，止动座510远离阀口部410的一端固设有和丝杆200活动导向配合的第一配合部5101。具体地，第一配合部5101和止动座510一体成型，且第一配合部5101的内壁和丝杆200的外壁活动导向配合。止动座510靠近阀口部410的一端固设有和丝杆200活动限位配合的第二配合部5102，且第二配合部5102和止动座510为分体成型设置。
如此，通过设置第一配合部5101，有利于提高丝杆200和止动座510的同轴度。并且，第二配合部5102和止动座510为分体式设置，则，有利于丝杆200在止动座510内的装配。
进一步地，在一实施例中，第二配合部5102止挡于第一限位件220靠近阀口部410的一端，以阻止第一限位件220朝向阀口部410移动。并且，第一弹性件610一端抵接于第一配合部5101，另一端抵接于第一限位件220。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提 下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (29)

  1. 一种电子膨胀阀，其特征在于，包括止动座、转子组件、丝杆以及阀座组件，所述阀座组件设有阀口部；
    所述电子膨胀阀还包括第一弹性件，所述第一弹性件一端直接或间接连接所述止动座，另一端连接直接或间接连接所述丝杆，当所述丝杆沿着从所述阀口部到所述转子组件的方向移动时，所述第一弹性件能够对所述丝杆产生自所述转子组件向所述阀口部方向的弹性预紧力。
  2. 根据权利要求1所述的电子膨胀阀，其中，所述电子膨胀阀还包括第一限位件和第二限位件，所述第一限位件和所述第二限位件中的一者固定连接于止动座，另一者固定连接于所述丝杆。
  3. 根据权利要求1所述的电子膨胀阀，其中，所述第一弹性件为压缩弹簧，且所述第一弹性件套设于所述丝杆的外侧。
  4. 根据权利要求2所述的电子膨胀阀，其中，所述第一限位件固定连接于所述止动座的内壁，所述第二限位件固定连接于所述丝杆的外壁，且所述第一弹性件远离所述阀口部的一端抵接于所述第一限位件，所述第一弹性件靠近所述阀口部的一端抵接于所述第二限位件。
  5. 根据权利要求4所述的电子膨胀阀，其中，所述丝杆的外壁设有第一杆体台阶，所述第一杆体台阶构成所述第二限位件。
  6. 根据权利要求4所述的电子膨胀阀，其中，所述止动座内壁设有第一座体台阶，所述止动座远离所述阀口部的一侧设有第一止挡部，所述第一限位件设于所述第一止挡部和所述第一座体台阶之间。
  7. 根据权利要求6所述的电子膨胀阀，其中，所述止动座的顶部设有第一连接嵌件，所述第一止挡部与所述第一连接嵌件连接。
  8. 根据权利要求2所述的电子膨胀阀，其中，所述第一限位件固定连接于所述丝杆的外壁，所述第二限位件固定连接于所述止动座的内壁，所述第一弹性件靠近所述阀口部的一端抵接于第一限位件，所述第一弹性件远离所述阀口部的一端抵接于第二限位件。
  9. 根据权利要求8所述的电子膨胀阀，其中，还包括限位套环，所述限位套环固定套设于所述丝杆的外侧，且所述限位套环止挡于所述第一限位件远离所述阀口部的一端；所述止动座内壁设有第一座体台阶，所述第一限位件设于所述限位套环和所述第一座体台阶之间。
  10. 根据权利要求8所述的电子膨胀阀，其中，所述止动座远离所述阀口部的一侧设有第一止挡部，所述第一止挡部构成所述第二限位件。
  11. 根据权利要求10所述的电子膨胀阀，其中，所述止动座的顶部设有第一连接嵌件，所述第一止挡部与所述第一连接嵌件连接。
  12. 根据权利要求1所述的电子膨胀阀，其中，还包括阀芯组件和止动环，所述止动座还设有第二止挡部，当所述止动环止挡于所述第二止挡部时，所述阀芯组件与所述阀口部抵接并关闭所述阀口部。
  13. 根据权利要求1所述的电子膨胀阀，其中，还包括阀芯组件，所述阀芯组件包括滑动螺母和阀针组件，所述滑动螺母包括主体部和连接部，所述主体部为注塑件，所述滑动螺母通过所述主体部与所述止动座或阀座组件配合，所述连接部一端固定连接于所述主体部，另一端连接于所述阀针组件。
  14. 根据权利要求1所述的电子膨胀阀，其中，其中所述电子膨胀阀还包括止挡结构，所述止挡结构设于所述止动座的内壁，所述止挡结构能够抵接于所述丝杆的侧部，以阻止所述丝杆自所述转子组件向所述阀口部的方向移动；所述第一弹性件靠近所述阀口部的一端抵接于所述丝杆，所述第一弹性件远离所述阀口部的一端抵接于所述止动座，且所述第一弹性件为压缩状态，当所述丝杆自所述阀口部向所 述转子组件的方向移动时，压缩状态的所述第一弹性件能够对所述丝杆产生自所述转子组件向所述阀口部方向的弹性止挡力。
  15. 根据权利要求14所述的电子膨胀阀，其中，还包括限位套环，所述限位套环固定套设于所述丝杆外侧，所述止挡结构包括第一限位件，所述第一限位件一端固设于所述止动座的内壁，另一端沿着所述止动座的径向朝向靠近所述丝杆的方向延伸，且所述第一限位件止挡于所述限位套环靠近所述阀口部的一端，所述第一弹性件远离所述阀口部的一端止挡于所述第一限位件，所述第一弹性件靠近所述阀口部的一端止挡于所述丝杆的外壁。
  16. 根据权利要求15所述的电子膨胀阀，其中，所述止挡结构还包括设于所述止动座内壁的第一座体台阶，所述第一座体台阶止挡于所述第一限位件靠近所述阀口部的一端。
  17. 根据权利要求15所述的电子膨胀阀，其中，所述丝杆的外壁设有第一杆体台阶，所述第一弹性件一端抵接于所述第一杆体台阶，另一端抵接于所述第一限位件。
  18. 根据权利要求15所述的电子膨胀阀，其中，所述转子组件包括磁转子和连接件，所述磁转子套设于所述止动座的外侧并通过所述连接件固定连接所述丝杆远离所述阀口部的一端；
    所述限位套环卡设于所述第一限位件和所述连接件之间。
  19. 根据权利要求15所述的电子膨胀阀，其中，所述第一限位件为轴承件，并且，所述第一限位件的轴承外圈固定连接于所述止动座的内壁，所述第一限位件的轴承内圈活动套设于所述丝杆的外壁，且所述丝杆与所述第一限位件的轴承内圈导向配合。
  20. 根据权利要求14所述的电子膨胀阀，其中，所述丝杆的外壁固定套设有第一限位件，所述止挡结构包括设于所述止动座内壁的第二座体台阶，所述第二座体台阶止挡于所述第一限位件靠近所述阀口部的一端，以阻止所述丝杆朝向所述阀口部移动，所述止动座远离所述阀口部的一端设有第一止挡部，所述第一弹性件靠近所述阀口部的一端止挡于所述第一限位件，所述第一弹性件远离所述阀口部的一端止挡于所述第一止挡部。
  21. 根据权利要求20所述的电子膨胀阀，其中，还包括限位套环，所述限位套环固定套设于所述丝杆外侧，所述丝杆的外壁还设有第三杆体台阶，所述第一限位件固定卡设于所述限位套环和所述第三杆体台阶之间。
  22. 根据权利要求20所述的电子膨胀阀，其中，所述第一限位件为轴承件，并且，所述第一限位件的轴承内圈固定连接于所述丝杆的外壁，所述第一限位件的轴承外圈和所述止动座的内壁导向配合。
  23. 根据权利要求1所述的电子膨胀阀，其中，其中所述电子膨胀阀还包括第一限位件所述第一限位件为轴承件，所述第一限位件的轴承外圈限位于所述止动座的内壁，所述第一限位件的轴承内圈止挡于所述丝杆的外壁，以阻止所述丝杆朝向所述阀口部移动；所述第一弹性件靠近所述阀口部的一端与所述丝杆抵接，所述第一弹性件远离所述阀口部的一端与所述第一限位件内圈抵接。
  24. 根据权利要求23所述的电子膨胀阀，其中，所述止动座设远离所述阀口部的一端设有第一止挡部，所述第一限位件的轴承外圈嵌设于所述第一止挡部与所述止动座之间。
  25. 根据权利要求24所述的电子膨胀阀，其中，所述止动座包括止动主体和第一连接嵌件，所述止动主体为注塑成型件，所述第一连接嵌件一端嵌设于所述止动主体，另一端与所述第一止挡部焊接。
  26. 根据权利要求24所述的电子膨胀阀，其中，所述止动座还包括第二连接嵌件，所述第二连接嵌件一端嵌设于止动主体，另一端焊接于所述阀座组件。
  27. 根据权利要求1所述的电子膨胀阀，其中，
    所述电子膨胀阀还包括第一限位件，所述第一限位件为轴承件，所述第一限位件的轴承内圈固定连 接于所述丝杆的外壁，所述第一限位件的轴承外圈止挡于所述止动座的内壁，以阻止所述丝杆朝向所述阀口部移动，所述第一弹性件靠近所述阀口部的一端抵接于所述第一限位件的轴承外圈，所述第一弹性件远离所述阀口部的一端直接或者间接止挡于所述止动座的内壁。
  28. 根据权利要求27或6所述的电子膨胀阀，其中，所述止动座远离所述阀口部的一侧设有第一止挡部，所述第一止挡部构成第二限位件；可选地，
    所述第一止挡部包括环形固定圈，所述环形固定圈的内侧围设于所述丝杆的周侧，且所述环形固定圈的外圈固定连接于所述止动座的内壁。
  29. 根据权利要求28所述的电子膨胀阀，其中，所述止动座包括止动主体和第一连接嵌件，所述止动主体为注塑成型件，所述第一连接嵌件一端嵌设于所述止动主体，另一端与所述环形固定圈焊接。
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CN221349459U (zh) * 2023-06-19 2024-07-16 盾安汽车热管理科技有限公司 电子膨胀阀

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