WO2018133673A1 - 一种电子膨胀阀及其组装方法 - Google Patents

一种电子膨胀阀及其组装方法 Download PDF

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Publication number
WO2018133673A1
WO2018133673A1 PCT/CN2018/071356 CN2018071356W WO2018133673A1 WO 2018133673 A1 WO2018133673 A1 WO 2018133673A1 CN 2018071356 W CN2018071356 W CN 2018071356W WO 2018133673 A1 WO2018133673 A1 WO 2018133673A1
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WO
WIPO (PCT)
Prior art keywords
valve
screw
needle
electronic expansion
valve needle
Prior art date
Application number
PCT/CN2018/071356
Other languages
English (en)
French (fr)
Inventor
唐思杰
许国华
Original Assignee
浙江三花制冷集团有限公司
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 浙江三花制冷集团有限公司 filed Critical 浙江三花制冷集团有限公司
Priority to JP2019538515A priority Critical patent/JP6842813B2/ja
Priority to CN201880007158.8A priority patent/CN110291314B/zh
Priority to US16/478,118 priority patent/US11287167B2/en
Publication of WO2018133673A1 publication Critical patent/WO2018133673A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/50Preventing rotation of valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/50Mechanical actuating means with screw-spindle or internally threaded actuating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/005Outdoor unit expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06Details of flow restrictors or expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2513Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/315Expansion valves actuated by floats
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/32Expansion valves having flow rate limiting means other than the valve member, e.g. having bypass orifices in the valve body
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/325Expansion valves having two or more valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/33Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/36Expansion valves with the valve member being actuated by bimetal elements or shape-memory elements influenced by fluids, e.g. by the refrigerant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/37Capillary tubes
    • F25B41/375Capillary tubes characterised by a variable restriction, e.g. restrictors made of shape memory alloy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to the field of fluid control technology, and in particular to an electronic expansion valve and an assembly method thereof.
  • An electronic expansion valve of the prior art generally includes a valve body member, a rotor member, a screw member, and a valve needle member, and the rotary member of the rotor member drives the screw member to act on the valve needle member, thereby moving the valve needle member away or Close to the valve port, the flow adjustment function of the electronic expansion valve is realized.
  • the valve needle is always rotated relative to the valve port portion from the position of the valve port to the position where the valve needle is sufficiently pushed to the valve port portion, causing the two to be relatively rotated.
  • the contact surface is worn, and the moment when the valve needle is separated from the valve port portion, the friction is generated by the relative rotation, especially in the case where the valve needle is repeatedly operated, the contact surface of the valve needle and the valve mouth portion is The wear is further aggravated, which may cause the valve port to leak in the closed state, resulting in poor valve performance.
  • An object of the present invention is to provide an electronic expansion valve which reduces wear of a contact surface between a valve needle and a valve port portion, thereby reducing internal leakage of the electronic expansion valve in a valve closing state.
  • Another object of the present invention is to provide an assembly method of an electronic expansion valve having the above functions.
  • valve body member having a valve chamber
  • a rotor component disposed in the valve cavity
  • a lead screw member capable of being driven by the rotor member to move axially relative to the valve body member, the lead screw member including a first support portion;
  • a movable connecting member comprising a second supporting portion and a first hanging portion
  • valve needle member being capable of being remote from or proximate to a valve port portion for adjusting an opening of the electronic expansion valve, the valve needle member including a second suspension portion;
  • the elastic member is disposed outside the movable connecting member, one end of the elastic member abuts against the movable connecting member, and the other end abuts the valve needle member;
  • the first supporting portion can hangably support the first hanging portion, and the second supporting portion can hangably support the second hanging portion;
  • the elastic member does not generate the valve needle member to push the valve port portion when the valve needle member closes the valve mouth portion until the screw member moves toward the valve closing direction by a predetermined displacement amount Elastic force of pressure;
  • the elastic member generates pushing the valve needle member toward the valve port when the valve needle member closes the valve port portion until the screw member moves toward the valve closing direction by a predetermined displacement amount or more The elastic force of the pressure.
  • the electronic expansion valve does not generate the valve needle member from the time when the valve needle member closes the valve opening portion until the movement displacement amount of the screw member in the valve closing direction does not exceed the preset displacement amount.
  • the elastic force to the valve mouth portion is applied to the valve needle member to push it toward the valve port only after the valve needle member closes the valve port portion and the displacement amount of the screw member in the valve closing direction exceeds the preset displacement amount.
  • An electronic expansion valve of the above configuration further comprising a valve sleeve, the valve core sleeve being at least partially disposed in the valve cavity and fixedly coupled to the valve body member; the valve needle member and the movable body
  • the connecting members are each at least partially disposed in the valve sleeve, and an inner wall of the valve sleeve forms a guide that guides the movable connecting member and/or the valve needle member.
  • the movable connecting member having a first connecting cavity, the screw member including a screw member connecting portion extending into the first connecting cavity, the screw member connecting portion being formed The first support portion;
  • the movable connecting member further has a stopping portion disposed under the first supporting portion, and when the screw member tends to move in a valve closing direction until the first supporting portion abuts the stopping portion, The screw member is configured to urge the movable connecting member to move in a valve closing direction to cause the elastic member to generate an elastic force that urges the needle member toward the valve port portion.
  • the movable connecting member includes a connecting body having an upper opening portion and a lower opening portion communicating with each other, an upper member fixed to the upper opening portion, and an upper member fixed to the lower opening portion a lower member; the connecting body, the upper member and the lower member forming the first connecting cavity;
  • the upper member is formed with the first hanging portion, and the lower member is formed with the second supporting portion;
  • One end of the elastic member abuts the lower member.
  • the inner wall of the connecting body extends radially to form a first annular boss, and the first annular boss forms the stopping portion;
  • the upper member includes a first annular member having a through hole, the first annular member is disposed at an outer circumference of the screw member, and the first annular member is formed with the first hanging portion;
  • the lower member includes a base member having a through hole disposed at an outer circumference of the valve needle member, the inner wall of the base member extending radially to form a second annular boss, the second annular boss The second support portion is formed.
  • the valve needle member includes a valve needle, the valve needle includes a main body portion, a flow regulating portion and a rod portion, and the first step portion is formed between the main body portion and the rod portion, The other end of the elastic member abuts against the first step portion; the valve needle member further includes a second engaging member, the second engaging member is disposed at an outer circumference of the rod portion, and the second portion The engaging member is formed with the second hanging portion.
  • the movable connecting member comprising a connecting body having an upper opening, an upper member fixed to the upper opening, and a lower member fixedly coupled to the connecting body;
  • the connecting body and the upper member form the first connecting cavity, the upper member is formed with the first hanging portion, and the lower member is formed with the second supporting portion;
  • the elastic member is disposed on an outer peripheral portion of the connecting body, and one end of the elastic member abuts against the connecting body.
  • the connecting body includes a large diameter section and a small diameter section, the large diameter section has a stepped hole with a stepped upward surface, and the hole wall of the stepped hole is formed with a first step portion. Forming a first step portion and the stop portion;
  • the large diameter section and the small diameter section together form a second step portion with a stepped surface facing downward, and one end of the elastic element abuts against the second step portion;
  • the upper member includes a first annular member having a through hole, the first annular member is disposed at an outer circumference of the screw member, and the first annular member is formed with the first hanging portion;
  • the lower member includes a second annular member having a through hole, the second annular member being fixedly coupled to the connecting body, and the second annular member being formed with the second supporting portion.
  • valve needle member comprising a valve needle and a second engaging member
  • the valve needle includes a main body portion having an open cavity, and a flow regulating portion
  • the second engaging member is formed with a second hanging portion, and the other end of the elastic member abuts against the second hanging portion;
  • the second engaging member is fixedly coupled to the main body portion and forms a second connecting cavity, and the second supporting portion is disposed in the second connecting cavity.
  • the second engaging member includes a bottom plate portion and a cylindrical portion, the bottom plate portion having a through hole that cooperates with a small diameter portion of the connecting body, and the bottom plate portion forms the second portion a hanging portion, the bottom plate portion and the cylindrical portion form a receiving cavity, and the other end of the elastic member is placed in the receiving cavity and abuts against the bottom plate portion.
  • the screw member comprising a lead screw and a first engaging member fixedly coupled to the lead screw, the screw member connecting portion including the first engaging member and the a portion of the lead screw located in the first connection cavity;
  • the first engaging member includes a large diameter ring between the upper member and the stopping portion, and the large diameter ring forms the first supporting portion.
  • the present invention also provides an assembly method of an electronic expansion valve having the technical effect, the electronic expansion valve comprising:
  • valve body member including an upper valve body and a lower valve body, the valve body member having a valve chamber
  • valve sleeve a valve sleeve, the valve sleeve being at least partially disposed in the valve cavity
  • a rotor component disposed in the valve cavity
  • the screw member comprising a first support portion
  • valve needle member being capable of being remote from or proximate to a valve port portion for adjusting an opening of the electronic expansion valve, the valve needle member including a second suspension portion;
  • a resilient member and a movable connecting member including a first suspension portion and a second support portion;
  • the assembly method includes the following steps:
  • the lower valve body is fixedly connected with the valve core sleeve to form a second component
  • the lower end of the first component is inserted into the valve core sleeve, and the nut component is sleeved to the outer circumference of the screw rod component to screw the two, and then the nut component and the lower portion are The valve body is fixedly connected;
  • the movable connecting member includes a connecting body having an upper opening portion and a lower opening portion that communicate with each other, an upper member and a lower member, the connecting body having a function capable of cooperating with the screw member a stop portion, the upper member is formed with the first suspension portion, and the lower member is formed with the second support portion;
  • the screw member includes a lead screw and a first engaging member, and the first engaging member is formed with the first supporting portion;
  • the valve needle member includes a valve needle and a second engaging member, and the second engaging member forms the second hanging portion;
  • Step S1 specifically includes:
  • the elastic member, the lower member and the second engaging member are disposed at an outer peripheral portion of the valve needle, and one end of the elastic member abuts against the lower member, and the other end abuts against The valve needle;
  • the upper member and the lower member are fixedly coupled to the upper opening portion and the lower opening portion of the connecting body, respectively.
  • the movable connecting member includes a connecting body having an upper opening portion, an upper member, and a lower member, the connecting body having a stopper portion engageable with the screw member,
  • the upper member is formed with the first hanging portion, and the lower member is formed with the first supporting portion;
  • the screw member includes a lead screw and a first engaging member, and the first engaging member is formed with the first supporting portion;
  • the valve needle member includes a valve needle and a second engaging member, and the second engaging member is formed with the second hanging portion;
  • Step S1 specifically includes:
  • the upper member is fixedly connected to the upper opening of the connecting body, and the valve needle is fixedly connected to the second engaging member.
  • step S3 the connecting body and the valve needle are both in clearance with the spool sleeve, and the spool sleeve faces the movable connecting member and the valve The needle member is guided.
  • the invention also provides a technical solution of another electronic expansion valve, comprising:
  • valve body member having a valve chamber
  • a rotor component disposed in the valve cavity
  • a lead screw member capable of being driven by the rotor member to move axially relative to the valve body member, the lead screw member including a first support portion;
  • a movable connecting member comprising a second supporting portion and a first hanging portion
  • valve needle member being capable of being remote from or proximate to a valve port portion for adjusting an opening of the electronic expansion valve, the valve needle member including a second suspension portion;
  • the elastic member is disposed outside the movable connecting member, one end of the elastic member abuts the movable connecting member, and the other end abuts the screw member;
  • the first supporting portion can hangably support the first hanging portion, and the second supporting portion can hangably support the second hanging portion;
  • the elastic member does not generate the valve needle member to push the valve mouth portion when the valve needle member closes the valve mouth portion until the screw member moves toward the valve closing direction for a predetermined displacement amount Elastic force of pressure;
  • the elastic element generates pushing the valve needle member toward the valve port when the valve needle member closes the valve port portion until the screw member moves toward the valve closing direction by a predetermined displacement amount or more The elastic force of the pressure.
  • the electronic expansion valve of this technical solution also has the same technical effect.
  • An electronic expansion valve of the above configuration further comprising a valve sleeve, the valve core sleeve being at least partially disposed in the valve cavity and fixedly coupled to the valve body member; the valve needle member and the movable body
  • the connecting members are each at least partially disposed in the valve sleeve, and an inner wall of the valve sleeve forms a guide that guides the movable connecting member and/or the valve needle member.
  • the movable connecting member having a first connecting cavity, the screw member including a screw member connecting portion extending into the first connecting cavity, the screw member connecting portion being formed The first support portion;
  • the valve needle member includes a stop portion below the movable connecting member, the elastic member after the screw member tends to move in a valve closing direction until the movable connecting member abuts against the stopper portion An elastic force that urges the needle member toward the valve port portion can be generated.
  • the movable connecting member comprising a connecting body and a lower member
  • the connecting body has an upper opening portion and a lower opening portion communicating with each other, the connecting body is formed with the first hanging portion, and one end of the elastic member abuts the first hanging portion;
  • the lower member is fixedly coupled to the connecting body to form the first connecting cavity, the first supporting portion and the second hanging portion are disposed in the first connecting cavity, and the lower member forms the second connecting body Support section.
  • the connecting body includes a small-diameter cylinder portion disposed on an outer circumference of the screw member, and further includes a large-diameter cylinder portion for forming the first connection chamber, the small-diameter cylinder portion and The large diameter cylindrical portion forms a first step portion, and the first step portion forms the first hanging portion.
  • valve needle member including a valve needle
  • the valve needle including a main body portion, a flow rate adjusting portion and a rod portion, the main body portion and the rod portion forming a second step portion,
  • the second step portion forms the stop portion
  • a portion of the rod portion that protrudes into the first connection cavity has a first radial protrusion formed extending in a radial direction, and the first radial protrusion forms the second suspension portion.
  • the screw member comprising a lead screw and a first engaging member fixedly coupled to the lead screw, the screw member connecting portion including the first engaging member and the a portion of the lead screw located in the first connection cavity;
  • the first engaging member is formed with the first supporting portion
  • a portion of the lead screw above the movable connecting member is provided with a spring support portion, and the other end of the elastic member abuts the spring support portion.
  • the spring support portion includes a second radial projection formed by extending the lead screw in a radial direction, and the other end of the elastic member and the second radial projection Abut.
  • valve needle member having a stopper
  • the movable connecting member having a pressing portion that moves toward the pressing portion to the pressing portion when the screw member tends to be in a valve closing direction
  • the elastic member After the stopper abuts, the elastic member generates an elastic force that urges the needle member toward the valve port portion.
  • the movable connecting member includes a connecting body and a lower member, the connecting body being formed with the first hanging portion;
  • the lower member includes a first member fixedly coupled to the connecting body and a second member disposed between the first member and the elastic member, the first member being formed with the second supporting portion
  • the second member is formed with the pressing portion, and one end of the elastic member abuts against the pressing portion.
  • the screw member comprising a lead screw and a first engaging member having an upper opening portion and a lower opening portion fixedly coupled to the screw rod, the first engaging member being formed with The first supporting portion; the other end of the elastic member abuts the first engaging member;
  • the lead screw is fixedly connected with the first engaging member to form a first connecting cavity, and the first hanging portion is disposed in the first connecting cavity.
  • the connecting body includes a small diameter section that cooperates with the second member, a large diameter section that cooperates with the elastic element, and a hanging section that extends into the first connection cavity;
  • the suspension section is formed with the first suspension portion, and the first engaging member is formed with a first flange portion that protrudes inward, and the first flange portion forms the first support portion.
  • the second member is disposed at an outer peripheral portion of the small diameter section, and includes a straight cylindrical portion that cooperates with the small diameter portion and a first portion that extends radially from an outer wall of the straight cylindrical portion a radial protrusion, the first radial protrusion forming the pressing portion, and one end of the elastic member abuts the first radial protrusion.
  • valve needle member comprising a valve needle and a second engaging member fixedly coupled to the valve needle, the second engaging member being formed with the second hanging portion; a second hanging portion is disposed between the pressing portion and the second supporting portion, the valve needle and the second engaging member form a second connecting cavity, and the second supporting portion is disposed on the first Two connected to the cavity.
  • the invention also provides an assembly method for assembling the electronic expansion valve of the structure, the electronic expansion valve comprising:
  • valve body member including an upper valve body and a lower valve body, the valve body member having a valve chamber
  • valve sleeve a valve sleeve, the valve sleeve being at least partially disposed in the valve cavity
  • a rotor component disposed in the valve cavity
  • the screw member comprising a first support portion
  • valve needle member being capable of being remote from or proximate to a valve port portion for adjusting an opening of the electronic expansion valve, the valve needle member including a second suspension portion;
  • a resilient member and a movable connecting member including a first suspension portion and a second support portion;
  • the assembly method includes the following steps:
  • the lower valve body is fixedly connected with the valve core sleeve to form a second component
  • the lower end of the first component is inserted into the valve core sleeve, and the nut component is sleeved to the outer circumference of the screw rod component to screw the two, and then the nut component and the lower portion are The valve body is fixedly connected;
  • the movable connecting member includes a connecting body having an upper opening portion and a lower opening portion that communicate with each other, and a lower member, the connecting body being formed with the first hanging portion, a lower member is formed with the second support portion;
  • the screw member includes a screw rod and a first engaging member, the screw rod includes a spring supporting portion, and the first engaging member is formed with the first supporting portion;
  • the valve needle member includes a valve needle formed with a stop portion that cooperates with the upper member, and the valve needle member is formed with the second suspension portion;
  • Step S1 specifically includes:
  • the lower member is mounted on an outer peripheral portion of the valve needle
  • the SC12 the elastic member is sleeved on the outer circumference of the screw member, and the elastic member is located between the spring support portion and the lower end portion of the screw rod; the lower end portion of the screw rod is worn
  • the upper opening portion of the connecting body is fixedly connected to the first engaging member, and one end of the elastic member abuts the connecting body, and the other end abuts the spring supporting portion;
  • the lower member is fixedly coupled to the lower opening of the connecting body.
  • the movable connecting member includes a connecting body and a lower member, the connecting body is formed with the first hanging portion, and the lower member is formed with a pressing portion and the second portion Supporting portion
  • the screw member includes a lead screw and a first engaging member, and the first engaging member is formed with the first supporting portion;
  • the valve needle member includes a valve needle and a second engaging member, and the second engaging member is formed with the stopping portion and the second hanging portion;
  • Step S1 specifically includes:
  • the SD 11 assembles the first engaging member, the elastic member, the lower member, the second engaging member, and the connecting body to form a first sub-assembly.
  • SD12 forming the first component: fixedly connecting the first engaging component of the first subassembly with the screw, and the second engaging component of the first subassembly
  • the valve needle is fixedly connected.
  • the lower member includes the first member and the second member
  • the step SD11 includes: arranging the second member on an outer peripheral portion of the connecting body, the elasticity The component is sleeved on the outer peripheral portion of the connecting body and located between the first engaging member and the second member; the second engaging member is sleeved on the outer peripheral portion of the second member; The first member is fixedly coupled to the connecting body.
  • step S3 the connecting body and the valve needle are both in clearance with the valve sleeve, and the valve sleeve is connected to the movable connection The component and the valve needle member are guided.
  • FIG. 1 is a schematic cross-sectional view showing a first embodiment of an electronic expansion valve according to the present invention, in which the valve is in a fully open state;
  • Figure 2 is a partial enlarged view of the I 1 portion of Figure 1;
  • Figure 3 is a partial enlarged view of the I 1 portion of the electronic expansion valve of Figure 1 in a closed state
  • Figure 4 is a partial enlarged view of the I 1 portion of the electronic expansion valve of Figure 1 in a closed state
  • Figure 5 is a partial enlarged view of the I 1 portion of the electronic expansion valve of Figure 1 in a closed state
  • Figure 6 is a cross-sectional view of the movable connecting member of the electronic expansion valve shown in Figure 1;
  • Figure 7 is a partial cross-sectional view showing a modification of the electronic expansion valve according to the first embodiment of the present invention.
  • Figure 8 is a cross-sectional view showing a second embodiment of the electronic expansion valve of the present invention, in which the valve is in a fully open state;
  • Figure 9 is a partial enlarged view of the I 2 portion of Figure 8.
  • Figure 10 is a partial enlarged view of the I 2 portion of the electronic expansion valve of Figure 8 in a closed state
  • Figure 11 is a partial enlarged view of the I 2 portion of the electronic expansion valve of Figure 8 in a closed state
  • Figure 12 is a partial enlarged view of the I 2 portion of the electronic expansion valve of Figure 8 in a closed state
  • Figure 13 is a schematic view showing the structure of the valve needle of the electronic expansion valve shown in Figure 8;
  • Figure 14 is a cross-sectional view showing a third embodiment of the electronic expansion valve of the present invention, in which the valve is in a fully open state;
  • Figure 15 is a partial enlarged view of the I 3 portion of Figure 14;
  • Figure 16 is a partial enlarged view of the I 3 portion of the electronic expansion valve of Figure 14 in a closed state
  • Figure 17 is a partial enlarged view of the I 3 portion of the electronic expansion valve of Figure 14 in a closed state
  • Figure 18 is a partial enlarged view of the I 3 portion of the electronic expansion valve of Figure 14 in a closed state
  • Figure 19 is a cross-sectional view showing a fourth embodiment of the electronic expansion valve according to the present invention, in which the valve is in a fully open state;
  • Figure 20 is a partial enlarged view of the portion I 4 of Figure 19;
  • Figure 21 is a partial enlarged view of the I 4 portion of the electronic expansion valve of Figure 19 in a closed state
  • Figure 22 is a partial enlarged view of the I 4 portion of the electronic expansion valve of Figure 19 in a closed state
  • Figure 23 is a partial enlarged view of the I 4 portion of the electronic expansion valve of Figure 19 in a closed state
  • Fig. 24 is a view showing the operational characteristics of the electronic expansion valve of the present invention, wherein t represents t 1 , t 2 , t 3 , t 4 in each embodiment.
  • orientation words, "upper” and “lower” and the like used herein are defined on the basis of the positions illustrated in the drawings of the specification, and the "axial” referred to herein refers to the electrons.
  • the axial direction of the expansion valve in particular, is in the axial direction of the valve sleeve of the electronic expansion valve, that is, the “top-down” or “bottom-up” vertical direction of the paper surface on which the drawings herein are located.
  • “Radial” as referred to herein means a direction perpendicular to the axial direction of the aforementioned electronic expansion valve.
  • the elastic element generates an elastic force that urges the needle member toward the valve port portion
  • the elastic member generates a force for causing the valve needle member to further press the valve port portion.
  • the valve needle member can be moved away from or near the valve port portion means that the valve needle member is axially movable relative to the valve port portion, including the case where the valve needle member closes the valve port portion.
  • “suspended ground support” herein means that one of the two components supports the other but the fixed connection between the two, and, in the state of the electronic expansion valve, The other can be seen as a synchronous movement integrally, and in the state where the electronic expansion valve is in some state, the relative displacement between the two can occur in the axial direction and/or the radial direction.
  • closed refers to a state in which the electronic expansion valve is in the closed state of FIG. 3, FIG. 10, FIG. 16 or FIG. 21 below, that is, the valve needle member is open from the valve state. It tends to move in the valve closing direction to a state where the valve needle member just closes the valve port portion.
  • fixed connection includes a direct fixed connection and also includes an indirect fixed connection through other parts.
  • drive described hereinafter includes direct drive, as well as through other component pairs. The indirect drive that the action passes.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 1 is a cross-sectional schematic view of a first embodiment of an electronic expansion valve provided by the invention
  • FIG 2 is a partial enlarged view of a portion of the I 1
  • FIG. 3 is shown in Figure 1 an enlarged view of the electronic expansion valve partially closed state in a temporary site I 1
  • FIG. 4 is an electronic expansion valve in a partially enlarged view of portion I 1 when the two closed state
  • FIG. 5 is an electron
  • FIG. 6 is a cross-sectional view of the electronic expansion valve connected to active member of FIG. 1
  • FIG. 24 shows a schematic diagram of the operating characteristics of the electronic expansion valve of the present invention.
  • the valve fully open state shown in FIG. 2 is defined as the "open valve state”.
  • the screw member 4A and the movable connecting member 6A have a relatively movable distance in the axial direction, and are marked as t 1 , that is, the preset displacement amount described in the embodiment; the state when the valve needle member 5A closes the valve port portion 21A is defined as “closed valve state one”, as shown in FIG. 3, at this time, the screw member 4A
  • the movable connecting member 6A has a distance t 1 which is relatively movable in the axial direction; the axial displacement amount defined from the "closed valve state one" shown in FIG.
  • the electronic expansion valve includes a valve body member 1A having a valve chamber 11A, a valve core sleeve 2A, a rotor member 3A, a screw member 4A, a valve needle member 5A, and a nut member 8A.
  • the valve body member 1A includes an upper valve body 12A and a lower valve body 13A, and a lower connection body is connected to the lower valve body 13A, and the upper valve body 12A and the lower valve body 13A are fixedly coupled to form a valve chamber 11A.
  • the rotor member 3A, the screw member 4A, and the needle member 5A are disposed in the valve chamber 11A.
  • the valve sleeve 2A is provided with a valve port portion 21A and is welded and fixed to the lower valve body 13A.
  • the lower end portion of the valve core sleeve 2A projects from the valve chamber 11A and is connected to the second nozzle. That is, in the present embodiment, the valve sleeve 2A is partially disposed in the valve chamber 11A.
  • the needle member 5A is disposed in the valve sleeve 2A and is in contact with or separated from the valve port portion 21A.
  • the rotor member 3A includes a rotor 31A and a connecting seat 32A fixedly coupled to the rotor 31A and a stopper lever 33A fixedly coupled to the connecting seat 32A.
  • the nut member 8A includes a nut 81A having an internally threaded hole fixedly coupled to the lower valve body 13A via the connecting piece 84A, a spring rail 82A fixed to the outer peripheral portion of the nut 81A, and a slip ring 83A, and the slip ring 83A is available on the spring rail 82A.
  • the upper side slides in the axial direction.
  • the nut member 8A further includes an upper stop portion and a lower stop portion.
  • the screw member 4A provided in the valve chamber 11A is fixedly coupled to the upper end portion of the rotor member 3A, and the external thread of the screw member 4A is engaged with the female screw hole of the nut member 8A fixed to the valve body member 1A.
  • the screw member 4A includes a first support portion.
  • the movable connecting member 6A is suspendedly supported by the screw member 4A.
  • the movable connecting member 6A includes a second supporting portion and a first hanging portion that can be supported by the first supporting portion.
  • the needle member 5A is suspendedly supported by the movable connecting member 6A, and specifically, the needle member 5A includes a second hanging portion supported by the second supporting portion of the movable connecting member 6A.
  • the elastic member 7A is provided outside the movable connecting member 6A, and one end thereof abuts against the movable connecting member 6A, and the other end abuts against the needle hand member 5A.
  • the screw member 4A when the screw member 4A is moved to the first support portion to hang the first suspension portion and the second support portion hangs to support the second suspension portion, the screw member 4A can move the movable connecting member 6A in the axial direction.
  • the movable connecting member 6A can move the needle member 5A in the axial direction.
  • the movable connecting member 6A has a first connecting chamber 61A having a screw member connecting portion that projects into the first connecting chamber 61A, and the screw member connecting portion is formed with a first supporting portion.
  • the movable connecting member 6A has a first hanging portion that cooperates with the first supporting portion toward the first connecting chamber 61A, and when the screw member 4A tends to move in the valve opening direction to abut the first supporting portion and the first hanging portion, the wire
  • the lever member 4A suspends the movable connecting member 6A and can move the movable connecting member 6A in the axial direction.
  • the valve needle member 5A has a valve needle member connecting portion that projects into the first connecting chamber 61A, the valve needle member connecting portion includes a second hanging portion, and the movable connecting member 6A has a second supporting portion toward the first connecting chamber 61A, when the screw When the member 4A tends to move in the valve opening direction so that the second suspension portion abuts against the second support portion, the movable connecting member 6A can hangably support the needle member 5A and can move the needle member 5A in the axial direction.
  • the movable connecting member 6A further has a stopper portion disposed under the first support portion, and the screw member 4A can drive the movable connection after the screw member 4A moves toward the valve closing direction until the first support portion abuts against the stopper portion.
  • the member 6A tends to move in the valve closing direction so that the elastic member 7A generates an elastic force that urges the needle member 5A toward the valve port portion 21A.
  • the screw member 4A is moved downward, that is, the screw member 4A is at a preset displacement amount with respect to the movable connecting member 6A. Within the range of 1 , the axial direction tends to move in the valve closing direction. During the downward movement of the screw member 4A, the position of the movable connecting member 6A is held by the elastic force of the elastic member 7A, and the elastic member 7A does not generate an elastic force for pressing the needle member 5A in the valve port portion 21A direction.
  • the screw member 4A continues to move toward the valve closing direction to the state shown in FIG. 5 in the state shown in FIG. 4, that is, in the valve closing state three, the screw member 4A pushes the movable connecting member 6A and is movably connected. The member 6A pushes the elastic member 7A together toward the valve closing direction. In the process, the elastic member 7A is deformed by pressure to generate an elastic force that urges the needle member 5A toward the valve port portion 21A.
  • the valve needle member 5A is integrally disposed in the valve core sleeve 2A, and in order to better ensure the coaxiality of the needle needle member 5A during the above movement, when the valve needle member 5A reciprocates in the axial direction, the spool
  • the inner wall of the sleeve 2A can be guided as a guide.
  • the movable connecting member 6A is also disposed substantially in the valve sleeve 2A, and the inner wall of the valve sleeve 2A can also be guided as a guide portion when the movable connecting member 6A reciprocates in the axial direction.
  • the upper end of the movable connecting member 6A has a small portion extending from the valve core sleeve 2A, that is, the movable connecting member 6A is partially disposed in the valve core sleeve 2A. Therefore, to avoid ambiguity, use the word “roughly” to describe. It will be understood by those skilled in the art that the movable connecting member 6A in this embodiment is completely disposed in the valve core sleeve 2A, that is, it is also possible to not expose the valve core sleeve 2A.
  • the lower end portion of the needle member 5A can also extend out of the valve sleeve 2A as long as the object of the present invention can be achieved.
  • the movable connecting member 6A is substantially disposed in the valve body sleeve 2A as an example.
  • the movable connecting member 6A includes a substantially cylindrical connecting body 62A.
  • the upper end portion of the connecting body 62A has an upper opening portion
  • the lower end portion of the connecting body 62A has a lower opening portion, an upper opening portion and a lower opening portion.
  • the movable connecting member 6A further includes an upper member 63A and a lower member 64A that are respectively fixed to the upper opening portion and the lower opening portion.
  • One end of the elastic member 7A abuts against the lower member 64A.
  • the upper member 63A is formed with a first hanging portion
  • the lower member 64A is formed with a second supporting portion
  • the elastic member 7A is specifically abutted against the second supporting portion.
  • the connecting body 62A, the upper member 63A, and the lower member 64A substantially surround the first connecting cavity 61A in the embodiment.
  • the connecting body 62A has a stopper located below the upper member 63A.
  • the connecting body 62A is specifically designed to include an "H"-shaped structure of the through-holes of the tube portion 621A and the first annular boss 622A.
  • the cylindrical portion 621A refers to a cylindrical portion of the connecting body 62A from the upper end surface portion to the lower end surface portion
  • the first annular boss 622A is integral with the cylindrical portion 621A and extends radially toward the first connecting chamber 61A along the inner wall of the cylindrical portion 621A.
  • the annular boss is formed, and the first annular boss 622A forms a stopper in the embodiment, and specifically, the upper end surface thereof abuts against the second suspension portion of the screw member 4A.
  • the upper member 63A is specifically a first ring member having an axial through hole which is sleeved on the outer circumference of the screw member 4A and fixed to the upper opening portion of the connecting body 62A by welding.
  • the first ring member is formed with a first hanging portion facing the lower end surface portion of the first connecting cavity 61A, and the first hanging portion has a certain distance from the upper end surface portion of the first annular boss 622A of the connecting body 62A in the axial direction, such that the upper portion
  • the member 63A, the cylindrical portion 621A of the connecting body 62A, and the first annular boss 622A (stop portion) of the connecting body 62A collectively form an accommodating space 611A located in the first connecting chamber 61A.
  • the lower member 64A is fixed to the lower opening portion of the connecting body 62A by welding, and the second supporting portion is formed on the lower member 64A.
  • the lower member 64A is specifically a base member having an axial through hole in the present embodiment, the base member being sleeved on the outer peripheral portion of the valve needle member 5A, more specifically, the base member is a belt shaft having a shape similar to that of the connecting body 62A.
  • a part of the inner wall thereof extends in the radial direction to form a second annular boss 641A having an upper end surface portion 6411A and a lower end surface portion 6412A, and the second annular boss 641A serves as the second support portion in this embodiment.
  • the upper end surface portion 6411A is for abutting against the second engaging member below.
  • a receiving groove is formed between the lower end surface portion 6412A and the side wall of the cylindrical portion 621A of the connecting body 62A, and a gasket 53A is disposed in the receiving groove.
  • the upper end of the elastic member 7A directly abuts against the lower end surface portion of the washer 53A, and the function of the washer 53A is to reduce the frictional force between the elastic member 7A and the base member, thereby reducing the gap between the valve needle 51A (see below) and the screw member 4A.
  • the frictional force prevents the needle 51A from rotating with the screw member 4A to reduce the wear of the valve port portion 21A.
  • the screw member 4A includes a screw 41A and a first engaging member 42A that is sleeved and fixed to the lower end portion of the screw 41A, and the first engaging member 42A is formed with a first supporting portion.
  • the screw member connecting portion of the present embodiment includes the first engaging member 42A and a portion of the screw 41A located in the first connecting chamber 61A.
  • the first engaging member 42A is a kit having a middle through hole that cooperates with the screw 41A, and the kit includes a large diameter ring 421A between the upper member 63A and the first annular boss 622A, and includes The diameter of the lower end face of the large diameter ring 421A extends downward is smaller than the small diameter ring 422A of the large diameter ring 421A, and the large diameter ring 421A serves as the first support portion in this embodiment.
  • the first engaging member 42A is fixed to the lower end portion of the screw 41A by welding, and the arrangement of the small diameter ring 422A facilitates welding between the two. It can be understood that the first engaging member 42A may not be provided with the small diameter ring 422A.
  • the large diameter ring 421A of the screw member 4A is movable in the axial direction in the aforementioned accommodation space 611A. Then, in the open state and the closed state of the electronic expansion valve, the lower end surface portion of the upper member 63A abuts against the upper end surface of the large diameter ring 421A of the screw member 4A, and the screw member 4A suspends the movable connecting member 6A. At this time, the axial distance between the lower end surface of the large diameter ring 421A of the screw member 4A and the upper end surface of the first annular boss 622A is the preset displacement amount t 1 described in the embodiment. It is assumed that the magnitude of the displacement amount t 1 can be set according to actual needs.
  • the first engaging member 42A and the screw 41A are two independent members, and the two are welded and fixed.
  • the two can also be used without affecting the assembly.
  • Fig. 7 is a partial cross-sectional view showing a modification of the electronic expansion valve according to the first embodiment of the present invention.
  • the screw member 4A' is an integral structure integrally formed, and includes a screw 41A'.
  • the lower end portion of the screw 41A' extends in the radial direction to form an annular boss 42A' as a second support portion.
  • the screw rod and the first engaging member of the screw member shown in FIG. 1 are integrally formed from one piece at a time, and the assembling process of the screw rod and the first engaging member is omitted.
  • the needle member 5A includes a valve needle 51A, which in turn includes a main body portion 511A, a flow regulating portion 512A disposed below the main body portion 511A and in contact with or separated from the valve port portion 21A, and
  • the rod portion 513A is disposed above the main body portion 511A.
  • the valve needle 51A reciprocates in the axial direction
  • the main body portion 511A can be guided by the inner wall of the valve core sleeve 2A as a guide portion, and the main body portion 511A and the rod portion 513A together form the first step portion 514A.
  • the elastic member 7A is sleeved on the outer circumference of the rod portion 513A, and one end of the elastic member 7A directly abuts against the gasket 53A, and indirectly abuts against the lower member 64A (base member) of the movable connecting member 6A, and the other end of the elastic member 7A abuts
  • the first step portion 514A is on.
  • the washer 53A described above may be provided on the stepped surface of the first step portion 514A, and the lower end of the elastic member 7A directly abuts against the washer 53A and indirectly abuts against the first step portion 514A.
  • a gasket 53A may be provided between the elastic member 7A and the first step portion 514A, and the action of the washer 53A is the same as that described above, and the description thereof will not be repeated.
  • the needle member 5A further includes a second engaging member 52A that is disposed in the outer peripheral portion of the stem portion 513A of the valve needle 51A and disposed in the first connecting chamber 61A.
  • the second engaging member 52A is formed with a second hanging portion.
  • the valve needle member connecting portion in this embodiment includes the second engaging member 52A and a portion in which the rod portion 513A of the state in Fig. 2 projects into the first connecting chamber 61A.
  • the second engaging member 52A is a C-shaped insert, and functions similarly to forming a notched radial convex ring at the circumference of the rod portion 513A, which abuts against the second supporting portion to enable the movable connecting member 6A to The valve needle member 5A is suspendedly supported.
  • the second engaging member 52A and the valve needle 51A are two independent members. Of course, the two may be integrally formed without affecting the assembly.
  • the second engaging member 52A and the valve needle 51A are two independent members, the second engaging member 52A may be fixed to the valve needle 51A or may be movably connected to the valve needle 51A. When movably connected, the second engaging member 52A is only fitted over the outer circumference of the rod portion 513A, and is axially movable relative to the rod portion 512A, as shown in this embodiment.
  • first engaging member 42A and the second engaging member 52A may not be provided in the above-described structure, and the two may be configured to cooperate with the corresponding structure to achieve the above connection requirement.
  • the second engaging member 52A and the lower member 64A have a predetermined radial displacement amount, that is, the second engaging member 52A can have a certain displacement activity in the radial direction with respect to the lower member 64A.
  • the needle member 5A can automatically adjust the center so that the flow regulating portion 512A of the needle member 5A can be easily fitted to the valve port portion 21A.
  • the screw 41A and the first engaging member 42A may also be provided with a predetermined radial displacement amount relative to the connecting body 62A, so that the screw 41A and the first engaging member 42A can also be adaptively adjusted. center.
  • FIG. 24 is a schematic diagram showing the operation characteristics of the electronic expansion valve of the present invention, including the relationship between the number of pulses of the motor and the displacement of the valve needle, the number of pulses of the motor and the force of the spring. Relationship and the relationship between the number of pulses of the motor and the valve flow.
  • valve opening state shown in Fig. 2 to the valve closing state shown in Fig. 3 is as follows:
  • the electronic expansion valve is in an open state in which the needle member 5A is separated from the valve port portion 21A.
  • the large diameter ring 421A of the first engaging member 42A of the screw member 4A abuts against the lower end surface of the upper member 63A of the movable connecting member 6A, so that the screw member 4A suspends the movable connecting member 6A.
  • the lower end surface portion of the second engaging member 52A of the needle hand member 5A abuts against the upper end surface portion 6411A of the second annular boss 641A of the lower member 64A, thereby supporting the needle hand member 5A by the movable connecting member 6A.
  • the screw member 4A is driven by the rotor member 3A of the electronic expansion valve to move in the valve closing direction until the flow rate adjusting portion 512A of the valve needle 51A comes into contact with the valve port portion 21A to close the valve port portion 21A, that is, to reach In the process of the valve closing state shown in Fig. 3, the screw member 4A, the movable connecting member 6A, the elastic member 7A and the valve needle member 5A can be seen as a whole and move together in the axial direction toward the valve closing direction, the screw member 4A, the relative positional relationship of the movable connecting member 6A, the needle member 5A, and the elastic member 7A coincides with the valve opening state shown in FIG.
  • valve closing state 1 shown in FIG. 3 The operation process of the valve closing state 1 shown in FIG. 3 to the valve closing state 2 shown in FIG. 4 is as follows:
  • the needle member 5A and the movable connecting member 6A are not moved downward in the axial direction, and only the screw member 4A moves downward in the axial direction toward the valve closing direction, that is, the screw member 4A is opposed to the movable connecting member 6A and the valve needle member. 5A axial displacement.
  • the screw member 4A is moved down to the first engaging member 42A, the large diameter ring 421A abuts against the first annular boss 622A of the connecting body 62A to be the end point of the closed state 2 . That is to say, the process in which the displacement of the screw member 4A from the closed valve state to the valve closing direction is less than or equal to the preset displacement amount t 1 is the closed state 2 .
  • Figure 4 shows a state equal to the predetermined displacement amount t of FIG. 1 is a displacement amount of the screw member 4A, this is the first large-diameter ring engaging member 421A 42A active connection with the first annular member 6A boss 622A just The moment of contact but not exerting force on it.
  • the elastic member 7A does not generate an elastic force that urges the needle member 5A against the valve port portion 21A. That is, the contact surface between the valve needle 51A and the valve port portion 21A is not affected by the elastic force of the elastic member 7A. It can be seen that during the entire valve closing state 2, even if the valve needle 51A rotates, the valve port portion 21A is only subjected to the frictional force caused by the self-weight portion of the valve needle member 5A and the movable connecting member 6A, which is the pair of the valve needle 51A and the valve port portion. The contact surface of the 21A has little wear.
  • the screw member 4A is further driven by the rotor member 3A to move in the axial direction toward the valve closing direction, due to the large diameter ring 421 of the first engaging member 42A of the screw member 4A. Abutting against the first annular boss 622A of the body 62A, during the downward movement of the screw member 4A, the movable connecting member 6A is pressed down by the screw member 4A, and the elastic member 7A is compressed and deformed to generate The elastic force that the needle 51A presses against the valve port portion 21A causes the valve needle 51A to more reliably seal the valve port portion 21A, and closes the valve port portion 21A to ensure the valve flow resistance.
  • the second engaging member 52A is sleeved on the outer circumference of the stem portion 513A of the valve needle 51A, in the process, the second engaging member 52A is moved downward by the self-gravity against the valve needle 51A, and the second engaging portion The member 52A is in contact with the lower member 64A of the movable connecting member 6A, and corresponds to the second engaging member 52A supported by the second supporting portion of the movable connecting member 6A, but the movable connecting member 6A and the valve needle 51A are relatively separated from each other.
  • the valve is in the closed state three, as shown in FIG. If the second engaging member 52A is also fixed to the valve needle 51A when actually installed, the second engaging member 52A is equivalent to the valve pin 51A. In the valve closing state three, the second engaging member 52A is separated from the second supporting portion of the movable connecting member 6A.
  • valve closing process of the electronic expansion valve is the same as when the valve needle 51A is separated from the valve port portion 21A during the valve opening process, and the friction between the valve needle 51A and the valve port portion 21A at the moment when the two are separated. Only the self-weight of the needle member 5A and the movable connecting member 6A is caused, and even if the operation is repeated, the amount of wear of the contact portion between the needle 51A and the valve port portion 21A is extremely small.
  • the electronic expansion valve of the present embodiment has the valve needle 51A and the valve at the moment when the valve needle 51A closes the valve port portion 21A and the moment when the valve needle 51A is separated from the valve port portion 21A, and the valve closing state 2
  • the frictional force between the mouth portions 21A is only the force caused by the self-weight portions of the needle hand member 5A and the movable connecting member 6A, so that even if the electronic expansion valve is repeatedly operated, the contact portion of the valve needle 51A and the valve port portion 21A is The wear between the two is also extremely small, thereby reducing the internal leakage when the electronic expansion valve is in the closed state.
  • valve needle 51A, the second engaging member 52A, the washer 53A, the elastic member 7A, the connecting body 62A, the upper member 63A, the lower member 64A, the screw 41A, the first card are processed as described above in the structures shown in Figs. 1 to 6 .
  • the processed valve needle 51A includes a main body portion 511A, a flow rate adjusting portion 512A and a rod portion 513A, and the main body portion 511A and the rod portion 513A together form a first step portion 514A.
  • Step S1 specifically includes the following steps:
  • the lower end of the elastic member 7A abuts on the first step portion 514A of the valve needle 51A, and the gasket 53A and the lower member 64A are sleeved on the outer peripheral portion of the valve needle 51A and positioned above the elastic member 7A, thus, the elastic member The upper end of the 7A directly abuts against the washer 53A, and indirectly abuts against the lower member 64A. Thereafter, the second engaging member 52A is caught on the outer peripheral portion of the needle 51A and is located between the lower member 64A and the upper end portion of the valve needle 51A.
  • valve needle 51A, the elastic member 7A, the washer 53A, the lower member 64A, and the second engaging member 52A are assembled to form the first sub-assembly.
  • the assembly order between the parts is not limited as long as the assembly of the first sub-assembly can be realized.
  • the first engaging member 42A is sleeved and welded to the lower end portion of the screw 41A, and then the upper member 63A is sleeved to the outer peripheral portion of the screw 41A to form a second sub-assembly.
  • the upper member 63A may be sleeved on the outer peripheral portion of the screw 41A, and then the first engaging member 41A may be sleeved on the lower end portion of the screw 41A and welded thereto.
  • the upper member 63A and the lower member 64A are respectively welded and fixed to the upper opening portion and the lower opening portion of the connecting body 62A to form a first assembly. That is to say, in this step, the assembly of the first component is completed after the first sub-assembly and the second sub-assembly are respectively fixed on the connection body 64A.
  • the lower valve body 13A and the valve core sleeve 2A and the first nozzle and the second nozzle are fixed by welding and welding to form a second component.
  • welding and welding can also be used to connect the parts.
  • the valve core sleeve 2A is placed in the lower valve body 13A and the lower end portion thereof protrudes from the lower valve body 13A, the second joint tube is welded to the outer periphery of the lower end portion of the valve core sleeve 2A, and the first joint tube is welded to the lower valve.
  • the side wall of the body 13A is used to form a second component.
  • the lower end of the valve needle 51A of the first component is inserted into the valve core sleeve 2A, so that the valve needle 51A and the valve core sleeve 2A are clearance-fitted, and the connecting body 62A is also matched with the valve core sleeve 2A, so that when the valve needle 51A, When the connecting body 62A moves axially, the inner wall of the valve sleeve 2A can guide both as a guide.
  • the nut member 8A is sleeved on the outer circumference of the screw 41A and screwed to the nut member 8A; the nut member 8A and the lower valve body 13A are welded and fixed;
  • the assembly of the electronic expansion valve shown in FIG. 7 is different from that of the first embodiment in that it has no assembly step of arranging and welding the first engaging member to the lower end portion of the screw rod in the first embodiment, and other implementations.
  • Example 1 is the same and will not be repeated.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 8 is a cross-sectional view showing a second embodiment of the electronic expansion valve of the present invention
  • Figure 9 is a partial enlarged view of the portion I 2 of Figure 8
  • Figure 10 is an I 2 of the electronic expansion valve of Figure 8 in a closed state.
  • a partial enlarged view of the portion as shown in FIG. 11 is an electronic expansion valve in a partially enlarged view showing a closed state when the two parts of the I 2 of 8, as shown in FIG.
  • FIG. 12 is a valve closing an electronic expansion valve in a state when three of I 2 8
  • FIG. 13 is a schematic view of the valve needle structure of the electronic expansion valve shown in FIG.
  • the valve fully open state shown in FIG. 9 is defined as the "open valve state”.
  • the screw member 4B and the movable connecting member 6B have a relatively movable distance in the axial direction, and are marked as t 2 , that is, the preset displacement amount described in the embodiment; the state when the valve needle member 5B closes the valve port portion 21B is defined as “closed valve state one”, as shown in FIG. 10, at this time, the screw member 4B
  • the movable connecting member 6B has a relatively movable distance t 2 in the axial direction; the amount of axial displacement defined from the "closed state one" shown in FIG.
  • the electronic expansion valve includes a valve body member 1B having a valve chamber 11B, a valve core sleeve 2B, a rotor member 3B, a screw member 4B, a valve needle member 5B, and a nut member 8B.
  • the valve body member 1B includes an upper valve body 12B and a lower valve body 13B, and a lower connection body is connected to the lower valve body 13B, and the upper valve body 12B and the lower valve body 13B are fixedly coupled to form a valve chamber 11B.
  • the rotor member 3B, the screw member 4B, and the valve needle member 5B are disposed in the valve chamber 11B.
  • the valve sleeve 2B is provided with a valve port portion 21B and is welded and fixed to the lower valve body 13B.
  • the lower end portion of the valve core sleeve 2B projects from the valve chamber 11B and is connected to the second nozzle. That is, in the present embodiment, the valve sleeve 2B is partially disposed in the valve chamber 11B.
  • the needle member 5B is disposed in the valve sleeve 2B and is in contact with or separated from the valve port portion 21B.
  • the rotor member 3B includes a rotor 31B and a connecting seat 32B fixedly coupled to the rotor 31B and a stopper rod 33B fixedly coupled to the connecting seat 32B.
  • the nut member 8B includes a nut 81B having an internally threaded hole fixedly coupled to the lower valve body 13B via the connecting piece 84B, a spring rail 82B fixed to the outer peripheral portion of the nut 81B, and a slip ring 83B, and the slip ring 83B is at the spring rail 82B.
  • the upper side slides in the axial direction.
  • the nut member 8B further includes an upper stop portion and a lower stop portion.
  • the screw member 4B provided in the valve chamber 11B is fixedly coupled to the upper end portion of the rotor member 3B, and the external thread of the screw member 4B is engaged with the female screw hole of the nut member 8B fixed to the valve body member 1B.
  • the screw member 4B includes a first support portion.
  • the movable connecting member 6B is suspendedly supported by the screw member 4B.
  • the movable connecting member 6B includes a second supporting portion and a first hanging portion that can be supported by the first supporting portion.
  • the needle member 5B is suspendedly supported by the movable connecting member 6B.
  • the valve needle member 5B includes a second hanging portion supported by the second supporting portion of the movable connecting member 6B.
  • the elastic member 7B is provided outside the movable connecting member 6B, and one end thereof abuts against the movable connecting member 6B, and the other end abuts against the needle hand member 5B.
  • the screw member 4B when the screw member 4B is moved to the first support portion to support the first suspension portion, and the second support portion is suspended to support the second suspension portion, the screw member 4B can move the movable connecting member 6B in the axial direction.
  • the movable connecting member 6B can move the needle member 5B in the axial direction.
  • the elastic member 7B When the valve needle member 5B closes the valve port portion 21B until the screw member 4B moves toward the valve closing direction by a predetermined displacement amount t 2 , that is, from the state shown in FIG. 3 to the state shown in FIG. 4 , the elastic member 7B The elastic force that pushes the needle member 5B toward the valve port portion 21B is not generated; when the valve needle member 5B closes the valve port portion 21B until the screw member 4B moves toward the valve closing direction by a predetermined displacement amount t 2 or more, the elasticity The element 7B generates an elastic force that urges the needle member 5B toward the valve port portion 21B.
  • the movable connecting member 6B has a first connecting chamber 61B having a screw member connecting portion that projects into the first connecting chamber 61B, and the screw member connecting portion is formed with a first supporting portion.
  • the movable connecting member 6B has a first hanging portion that cooperates with the first supporting portion toward the first connecting cavity 61B, and when the screw member 4B tends to move in the valve opening direction to abut the first supporting portion and the first hanging portion, the wire
  • the lever member 4B suspends the movable connecting member 6B and can move the movable connecting member 6B in the axial direction.
  • the valve needle member 5B has a valve needle member connecting portion that extends into the first connecting chamber 61B, the valve needle member connecting portion includes a second hanging portion, and the movable connecting member 6B has a second supporting portion toward the first connecting chamber 61B, when the screw When the member 4B tends to move in the valve opening direction so that the second suspension portion abuts against the second support portion, the movable connecting member 6B can hangably support the needle member 5B and can move the needle member 5B in the axial direction.
  • the movable connecting member 6B further has a stopper portion disposed under the first support portion.
  • the screw member 4B moves toward the valve closing direction until the first support portion abuts against the stopper portion, the screw member 4B can drive the movable connection.
  • the member 6B tends to move in the valve closing direction so that the elastic member 7B generates an elastic force that urges the needle member 5B toward the valve port portion 21B.
  • the screw member 4B is moved downward, that is, the screw member 4B is at the preset displacement amount with respect to the movable connecting member 6B. In the range of 2 , the axial direction tends to move in the valve closing direction.
  • the position of the movable connecting member 6B is held by the elastic force of the elastic member 7B, and the elastic member 7B does not generate an elastic force for pressing the needle member 5B toward the valve port portion 21B.
  • the screw member 4B continues to move toward the valve closing direction to the state shown in FIG. 12 in the state shown in FIG. 11, that is, in the valve closing state three, the screw member 4B pushes the movable connecting member 6B and is movably connected.
  • the member 6B pushes the elastic member 7B together toward the valve closing direction.
  • the elastic member 7B is deformed by pressure to generate an elastic force that urges the needle member 5B toward the valve port portion 21B.
  • the valve needle member 5B is integrally disposed in the valve core sleeve 2B, and in order to better ensure the coaxiality of the needle needle member 5B during the above movement, when the valve needle member 5B reciprocates in the axial direction, the spool
  • the inner wall of the sleeve 2B can be guided as a guide.
  • the movable connecting member 6B is also disposed substantially in the valve sleeve 2B, and the inner wall of the valve sleeve 2B can also be guided as a guide portion when the movable connecting member 6B reciprocates in the axial direction.
  • the upper end of the movable connecting member 6B has a small portion extending from the valve core sleeve 2B, that is, the movable connecting member 6B is partially disposed in the valve core sleeve 2B. Therefore, to avoid ambiguity, use the word "roughly” to describe. It will be understood by those skilled in the art that the movable connecting member 6B in this embodiment is completely disposed in the valve core sleeve 2B, that is, it is also possible not to expose the valve core sleeve 2B.
  • the lower end portion of the needle member 5B can also extend out of the valve sleeve 2B as long as the object of the present invention can be achieved.
  • the movable connecting member 6B is provided substantially in the valve body sleeve 2B as an example.
  • the movable connecting member 6B includes a connecting body 62B having an upper opening portion, an upper member 63B fixed to an upper opening portion of the connecting body 62B, and a lower member 64B fixed to a lower end portion of the connecting body 62B.
  • the upper member 63B and the connecting body 62B are fixed to form a first connecting cavity 61B.
  • the upper member 63B is formed with a first hanging portion, and the lower member 64B is formed with a second supporting portion.
  • the elastic member 7B is provided on the outer peripheral portion of the connecting body 62B, and one end thereof abuts against the connecting body 62B. Further, the connecting body 62B also has a stopper located below the upper member 63B.
  • the connecting body 62B is specifically designed to include a large diameter section 621B and a small diameter section 622B extending from the lower end surface portion of the large diameter section 621B in the axial direction toward the valve opening portion 21B.
  • the large diameter section 621B has a stepped hole whose step faces upward and communicates with the upper opening, and the first stepped portion 6211B is formed in the hole wall of the stepped hole.
  • the first step portion 6211B is disposed opposite to the lower end surface portion of the upper member 64B, and the first step portion 6211B forms a stopper portion in the present embodiment.
  • the step surface of the first step portion 6211B may abut or separate from the first support portion.
  • the large diameter section 621B and the small diameter section 622B together form a second step portion 6212B having a stepped surface facing downward, and one end of the elastic member 7B abuts against the second step portion 6212B.
  • the upper member 63B is specifically a first ring member having an axial through hole which is sleeved on the outer circumference of the screw member 4B and fixed to the upper opening portion of the connecting body 62B by welding.
  • the first ring member is formed with a first hanging portion facing the lower end surface portion of the first connecting chamber 61B, and the lower end surface portion thereof has a certain distance from the step surface of the first step portion 6211B of the connecting body 62B in the axial direction, such that the upper member 63B
  • An accommodation space 611B located in the first connection chamber 61B is formed between the first step portion 621B and the first step portion 621B.
  • the lower member 64B specifically includes a second annular member having a through hole which is sleeved at a lower end portion of the small diameter portion 622B of the connecting body 62B and fixedly connected thereto by welding, and the second annular member is formed with the first embodiment. a second supporting portion that the two engaging members abut.
  • the screw member 4B includes a screw 41B and a first engaging member 42B that is sleeved and fixed to the lower end portion of the screw 41B, and the first engaging member 42B is formed with a first supporting portion.
  • the screw member connecting portion of the present embodiment includes a portion of the first engaging member 42B and the screw 41B located in the first connecting chamber 61B.
  • the first engaging member 42B is a kit having a middle through hole that cooperates with the screw 41B, and the kit includes a large diameter ring 421B between the upper member 63B and the first step portion 6211B, and includes a sizable
  • the diameter of the diameter ring 421B extends downward in the axial direction is smaller than that of the small diameter ring 422B of the large diameter ring 421B.
  • the large diameter ring 421B serves as the first supporting portion in the embodiment.
  • the arrangement of the small diameter ring 422B facilitates the screw rod 42B and the first The welding between the engaging members 42B. It can be understood that the second engaging member 42B may not be provided with the small diameter ring 422B.
  • the large diameter ring 421B of the screw member 4B is movable in the axial direction in the aforementioned accommodation space 611B. Then, as shown in FIG. 9 and FIG. 11, in the open state and the closed state of the electronic expansion valve, the lower end surface portion of the upper member 64B abuts against the upper end surface of the large diameter ring 421B of the screw member 4B, and the screw The member 4B suspends the movable connecting member 6B, and the axial distance between the lower end surface of the large diameter ring 421B and the step surface of the first step portion 6211B forms the preset displacement amount t 2 described in the embodiment, which The size of the preset displacement amount t 2 can be set according to actual needs.
  • the first engaging member 42B and the screw 41B are two independent members, and the two are welded and fixed.
  • the two can also be used without affecting the assembly. It is assumed to be a unitary structure, which can be understood with reference to FIG. 7, and the description will not be repeated here.
  • the valve needle member 5B includes a valve needle 51B and a second engaging member 52B.
  • the valve needle 51B specifically includes a main body portion 511B having an open cavity 5111B, and is disposed below the main body portion 511B and the valve.
  • the flow rate adjusting portion 512B that the mouth portion 21B contacts or separates. Further, when the valve needle 51B reciprocates in the axial direction, the main body portion 511B can be guided by the inner wall of the valve core sleeve 2B as a guide portion.
  • the upper end portion of the second engaging member 52B is fixed to the opening portion of the opening cavity 5111B, the lower end portion of the opening portion 5111B is inserted into the opening cavity 5111B, and is fixedly connected with the main body portion 511B of the valve needle 51B to form the second connecting cavity 524B, and the movable connecting member 6B
  • the second support portion is placed in the second connection chamber 524B.
  • the second engaging member 52B specifically includes a bottom plate portion 521B that is sleeved on the outer peripheral portion of the small diameter portion 622B of the connecting body 62B and that can abut against the lower member 64B, and an axial direction upward from the peripheral edge of the bottom plate portion 521B.
  • the tubular portion 522B extends to the opening of the open cavity 5111B.
  • the upper end portion of the cylindrical portion 522B has an outward flange which is overlapped and welded to the upper end surface of the main body portion 511B.
  • the bottom plate portion 521B forms a second hanging portion, and the lower end surface portion abuts against the upper end surface portion of the second engaging member 52B.
  • the bottom plate portion 521B and the cylindrical portion 522B together form a receiving cavity 523B.
  • the elastic member 7B is sleeved on the outer circumference of the small diameter portion 622B of the connecting body 62B, and the other end of the elastic member 7B is placed in the receiving cavity 523B to abut against the inner bottom wall of the receiving cavity 523B, that is, abutting The upper end surface portion of the bottom plate portion 521B of the second engaging member 52B.
  • a washer 53B is disposed between the upper end and the large diameter section 621B of the connecting body 62B, that is, the washer 53B is disposed between the second step portion 6212B and the elastic member 7B. It will be appreciated that the washer 53B may also be disposed between the lower end of the resilient member 7B and the inner bottom wall of the receiving cavity 523B. Alternatively, it is also possible to provide a gasket 53B between the upper end of the elastic member 7B and the second step portion 6212B and between the lower end of the elastic member 7B and the inner bottom wall of the accommodating cavity 523B.
  • the second engaging member 52B can be fixed to the valve needle 51B or can be movably connected to the valve needle 51B.
  • the second engaging member 52B is overlapped on the upper end surface portion of the main body portion 511B only by the flange of the upper end portion thereof, and the valve needle 51B and the second engaging member 52B are kept separated by the action of the elastic member 7B.
  • first engaging member 42B and the second engaging member 52B may not be provided in the above-described structure, and the two may be configured to cooperate with the corresponding structure to achieve the above connection requirements.
  • the second engaging member 52B has a predetermined radial displacement amount between the small diameter segments of the connecting body 62B, that is, the second engaging member 52B can have a certain radial direction with respect to the small diameter portion 622B.
  • the displacement movable space is such that the needle member 5B can automatically adjust the center so that the flow regulating portion 512B of the needle member 5B can fit well with the valve port portion 21B.
  • the screw rod 41B can also be provided with a predetermined radial displacement amount relative to the first engaging member 42B and the first engaging member 42B relative to the large diameter portion 621B of the connecting body 62B, so that the screw rod 41B
  • the first engaging member 42B is also capable of adaptively adjusting the center.
  • the specific structure of the screw member 4B, the valve needle member 5B and the movable connecting member 6B in the present embodiment has been described in detail above.
  • the electronic expansion valve of the present embodiment is opened from the valve opening state shown in Fig. 9 to Fig. 12 with reference to Fig. 24 .
  • the operation of the valve closed state shown in detail will be described in detail.
  • valve opening state shown in Fig. 9 to the valve closing state shown in Fig. 10 is as follows:
  • the electronic expansion valve is in an open state in which the valve needle 51B is separated from the valve port portion 21B.
  • the large diameter ring 421B of the first engaging member 42B of the screw member 4B abuts against the lower end surface of the upper member 63B of the movable connecting member 6B, so that the screw member 4B suspends the movable connecting member 6B.
  • the lower end surface portion of the second engaging member 52B abuts against the upper end surface portion of the lower member 64B, thereby supporting the needle hand member 5B by the movable connecting member 6B.
  • the screw member 4B is driven by the rotor member 3B of the electronic expansion valve to move in the valve closing direction until the flow rate adjusting portion 512B of the valve needle 51B comes into contact with the valve port portion 21B to close the valve port portion 21B, that is, to reach In the process of the valve closing state shown in Fig. 10, the screw member 4B, the movable connecting member 6B, the elastic member 7B and the valve needle member 5B can be seen as a whole and move together in the axial direction toward the valve closing direction, the screw member 4B.
  • the relative positional relationship between the movable connecting member 6B, the needle member 5B, and the needle member 5B coincides with the valve opening state shown in FIG.
  • the elastic force that the needle member 5B presses against the valve port portion 21B causes the needle member 5B to close the valve port portion 21B by its own gravity, and the valve needle member 5B and the valve port portion 21B are not affected by the elastic force of the elastic member 7B even if The valve needle 51B is rotated, and the valve port portion 21B is also only subjected to the frictional force caused by the self-weight portion of the needle member 5B and the movable connecting member 6B, and the wear of the contact surface of the valve needle 51B and the valve port portion 21B is small.
  • valve closing state 1 shown in FIG. 10 The operation process of the valve closing state 1 shown in FIG. 10 to the valve closing state 2 shown in FIG. 11 is as follows:
  • the screw member 4B is further driven to move in the axial direction by the rotor member 3B, because the large diameter ring 421B of the first engaging member 42B and the first step portion 6211B
  • the positional relationship between the movable connecting member 6B, the needle member 5B, and the valve port portion 21B does not change in the presence of the preset displacement amount t 2 . That is, the needle member 5B and the movable connecting member 6B do not move downward, and only the screw member 4B moves downward toward the valve closing direction, that is, the screw member 4B is axially displaced relative to the movable connecting member 6B and the needle member 5B.
  • FIG 11 is a view showing a state in which the displacement amount of the screw member 4B is equal to the preset displacement amount t 2 , which is the contact of the large diameter ring 421B of the first engaging member 42B with the first step portion 6211B of the movable connecting member 6B. But the moment that did not exert force on it.
  • the elastic member 7B does not generate an elastic force that urges the needle member 5B toward the valve port portion 21B. That is, the contact surface between the valve needle 51B and the valve port portion 21B is not affected by the elastic force of the elastic member 7B. It can be seen that during the entire valve closing state 2, even if the valve needle 51B rotates, the valve port portion 21B receives only the frictional force caused by the self-weight portion of the valve needle member 5B and the movable connecting member 6B, which is the pair of the valve needle 51B and the valve port portion. The contact surface of 21B has little wear.
  • valve closing state 2 shown in Fig. 11 The operation from the valve closing state 2 shown in Fig. 11 to the valve closing state 3 shown in Fig. 12 is as follows:
  • the screw member 4B is further driven by the rotor member 3B to move downward in the valve closing direction.
  • the large diameter ring of the first engaging member 42B of the screw member 4B The 421B abuts against the first step portion 6211B of the body 62B, so that during the downward movement of the screw member 4B, the movable connecting member 6B is pressed down by the screw member 4B, and the lower member 64B is in the process.
  • the axial relative movement between the two engaging members 52B occurs, and the lower member 64B moves downward relative to the second engaging member 52B, so that the elastic deformation of the elastic member 7B generates an elastic force for pushing the valve needle 51B toward the valve opening portion 21B.
  • This elastic force causes the valve needle 51B to more reliably seal the valve port portion 21B, and the valve port portion 21B is tightly closed to ensure the valve flow-off property.
  • valve closing process of the electronic expansion valve is the same as when the valve needle 51B is separated from the valve port portion 21B during the valve opening process, and the friction between the valve needle 51B and the valve port portion 21B at the moment when the two are separated. Only the self-weight of the needle member 5B and the movable connecting member 6B is caused, and even if the operation is repeated, the amount of wear of the contact surface between the needle 51B and the valve port portion 21B is extremely small.
  • the electronic expansion valve of the present embodiment has the valve needle 51B and the valve at the moment when the valve needle 51B closes the valve port portion 21B and the valve needle 51B is separated from the valve port portion 21B, and during the valve closing state 2
  • the frictional force between the mouth portions 21B is only the force caused by the self-weight portion of the needle hand member 5B and the movable connecting member 6B, so that the contact face of the valve needle 51B and the valve port portion 21B during the repeated operation of the electronic expansion valve
  • the wear between them is also extremely small, thereby reducing the internal leakage when the electronic expansion valve is in the closed state.
  • each part or component required for processing the electronic expansion valve of this embodiment is processed, the second engaging member 52B, the washer 53B, the elastic member 7B, the connecting body 62B, the upper member 63B, the lower member 64B, the screw 41B, and the first engaging member 42B.
  • Step S1 specifically includes the following steps:
  • the gasket 53B is sleeved on the outer circumference of the small diameter section 622B of the connection body 62B, and then the elastic member 7B is also sleeved on the outer circumference of the small diameter section 622B, and one end of the elastic member 7B is opposed to the gasket 53B.
  • the lower member 64B is welded and fixed to the lower end portion of the small diameter portion 622B, and the assembly of the first subassembly is completed.
  • one end of the elastic member 7B abuts against the lower end surface portion of the large diameter portion 621B of the connection body 62B, and the other end abuts against the inner bottom wall of the accommodation cavity 523B of the second engagement member 52B.
  • the first engaging member 42B is welded and fixed to the lower end portion of the screw rod 41B, and the upper member 63B is sleeved to the outer peripheral portion of the screw rod 41B to form a second sub-assembly;
  • the upper member 63B is welded and fixed to the upper opening portion of the connecting body 62B, and the valve needle 51B and the second engaging member 52B are welded and fixedly connected, that is, in this step, the first sub-assembly and the second sub-assembly are respectively fixed at The assembly of the first component is completed after the connection body 62B.
  • the lower valve body 13B, the valve core sleeve 2B, and the first nozzle and the second nozzle are welded and fixed to form a second component.
  • other welding methods can also be used to connect the parts.
  • the valve core sleeve 2B is placed in the lower valve body 13B and the lower end portion thereof protrudes from the lower valve body 13B, the second joint tube is welded to the outer periphery of the lower end portion of the valve core sleeve 2B, and the first joint tube is welded to the lower valve.
  • the side wall of the body 13B is placed in the lower valve body 13B and the lower end portion thereof protrudes from the lower valve body 13B, the second joint tube is welded to the outer periphery of the lower end portion of the valve core sleeve 2B, and the first joint tube is welded to the lower valve.
  • the side wall of the body 13B is welded to the lower valve.
  • the first component is extended from the lower end of the valve needle 51B into the valve core sleeve 2B, and the valve needle 51B and the connecting body 64B are clearance-fitted with the valve core sleeve 2B, so that the valve needle 51B and the connecting body 62B are axially moved.
  • the inner wall of the valve sleeve 2B can guide both as a guide.
  • the nut member 8B is sleeved on the outer circumference of the screw rod 41B and screwed to the screw rod 41B; the nut member 8B is welded and fixed to the lower valve body 13B;
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • FIG. 14 is a cross-sectional view showing a valve opening state of a third embodiment of the electronic expansion valve according to the present invention
  • FIG. 15 is a partial enlarged view of the portion I 3 in FIG. 14
  • FIG. 16 is a closed valve of the electronic expansion valve shown in FIG. I 3 parts of a partial enlarged view of the state of the moment
  • FIG. 17 is an electronic expansion valve in FIG. 14 is a partially enlarged portion I 3 when the two closed state
  • FIG. 18 FIG. 14 is an electronic expansion valve in a closed state three A partial enlarged view of the I 3 site at the time.
  • valve is fully opened to the state of "open valve state".
  • the valve needle member 5C and the movable connecting member 6C have a relatively movable distance in the axial direction, and are labeled as t 3 , that is, this document
  • the "preset displacement amount” described above is as shown in Fig. 15; the state when the valve needle member 5C closes the valve port portion 21C is defined as “closed valve state one", as shown in Fig. 16, at this time, the valve needle member 5C and the movable connecting member 6C have a relatively movable distance t 3 in the axial direction, and the axial displacement amount defined from the "closed valve state one" shown in Fig.
  • the axial displacement amount of the direction movement is greater than the preset displacement amount t 3 , it is "closed valve state three", as shown in FIG.
  • the electronic expansion valve includes a valve body member 1C having a valve chamber 11C, a valve core sleeve 2C, a rotor member 3C, a screw member 4C, a valve needle member 5C, and a nut member 8C.
  • the valve body member 1C includes an upper valve body 12C and a lower valve body 13C, and a lower connection body is connected to the lower valve body 13C, and the upper valve body 12C and the lower valve body 13C are fixedly coupled to form a valve chamber 11C.
  • the rotor member 3C, the screw member 4C, and the valve needle member 5C are disposed in the valve chamber 11C.
  • the valve sleeve 2C is provided with a valve port portion 21C and is welded and fixed to the lower valve body 13C.
  • the lower end portion of the valve core sleeve 2C projects from the valve chamber 11C and is connected to the second nozzle. That is, in the present embodiment, the valve core sleeve 2C is partially disposed in the valve chamber 11C.
  • the needle member 5C is disposed in the valve sleeve 2C and is in contact with or separated from the valve port portion 21C.
  • the rotor member 3C includes a rotor 31C and a connecting seat 32C fixedly coupled to the rotor 31C and a stopper lever 33C fixedly coupled to the connecting seat 32C.
  • the nut member 8C includes a nut 81C having an internally threaded hole fixedly coupled to the lower valve body 13C via the connecting piece 84C, a spring rail 82C fixed to the outer peripheral portion of the nut 81C, and a slip ring 83C, and the slip ring 83C is available on the spring rail 82C.
  • the upper side slides in the axial direction.
  • the nut member 8C further includes an upper stop portion and a lower stop portion.
  • the screw member 4C provided in the valve chamber 11C is fixedly coupled to the upper end portion of the rotor member 3C, and the external thread of the screw member 4C is engaged with the female screw hole of the nut member 8C fixed to the valve body member 1C.
  • the component 4C includes a first support portion.
  • the movable connecting member 6C is suspendedly supported by the screw member 4C.
  • the movable connecting member 6C includes a second supporting portion and a first hanging portion that can be supported by the first supporting portion.
  • the needle member 5C is suspendedly supported by the movable connecting member 6C, and specifically, the needle member 5C includes a second hanging portion supported by the second supporting portion of the movable connecting member 6C.
  • the elastic member 7C is provided outside the movable connecting member 6C, and one end thereof abuts against the movable connecting member 6C, and the other end abuts against the screw member 4C.
  • the screw member 4C when the screw member 4C is moved to the first support portion to support the first suspension portion, and the second support portion is suspended to support the second suspension portion, the screw member 4C can move the movable connecting member 6C in the axial direction.
  • the movable connecting member 6C can move the needle member 5C in the axial direction.
  • valve needle closes the valve port member 5C portion 4C 21C starts to screw member tends to move the valve closing direction during a predetermined displacement amount t 3, i.e., from the state shown in FIG. 16 to the state in the process shown in FIG. 17, the resilient member 7C
  • the elastic force that pushes the needle member 5C toward the valve port portion 21C is not generated; when the valve needle member 5C closes the valve port portion 21C until the screw member 4C moves toward the valve closing direction by a predetermined displacement amount t 3 or more, the elasticity
  • the element 7C generates an elastic force that urges the needle hand member 5C toward the valve port portion 21C.
  • the electronic expansion valve includes a movable connecting member 6C having a first connecting chamber 61C, the upper end portion of which is placed in the first connecting chamber 61C, and the movable connecting member 6C hangs to support the needle member 5C.
  • the lower end portion of the screw member 4C is placed in the first connection chamber 61C, and the movable connection member 6C can be suspendedly supported.
  • the portion of the screw member 4C located outside the first connection chamber 61C has an external thread to engage with the internally threaded hole of the nut member 8C fixed to the valve body member 1C.
  • the rotor member 3C provided in the valve chamber 11C is fixedly coupled to the upper end portion of the screw member 4C, and the rotor member 3C can drive the screw member 4C to reciprocate in the axial direction of the valve sleeve 2C.
  • An elastic member 7C is provided outside the movable connecting member 6C, and one end thereof abuts against the movable connecting member 6C, and the other end abuts against the screw member 4C.
  • the external thread of the screw member 4C cooperates with the internally threaded hole of the nut member 8C fixed to the valve body member 1C, and the rotor member 3C provided in the valve chamber 11C can drive the screw member 4C to reciprocate in the axial direction of the valve sleeve 2C. mobile.
  • the elastic member 7C When the valve needle member 5C closes the valve port portion 21C until the screw member 4C moves toward the valve closing direction by a predetermined displacement amount, the elastic member 7C does not generate an elastic force for pushing the needle needle member 5C toward the valve port portion 21; When the valve needle member 5C closes the valve port portion 21C until the screw member 4C moves in the valve closing direction by a predetermined displacement or more, the elastic member 7C generates an elastic force that urges the needle needle member 5C toward the valve port portion 21C.
  • the screw member 4C has a screw member connecting portion that extends into the first connecting chamber 61C.
  • the screw member connecting portion is formed with a first supporting portion
  • the movable connecting member 6C has a first connecting chamber 61C and a first portion
  • the first hanging portion that the supporting portion is engaged with, when the screw member 4C moves in the valve opening direction to abut the first supporting portion and the first hanging portion, the screw member 4C can hangably support the movable connecting member 6C and drive the movable connection
  • the part 6C tends to move in the valve opening direction.
  • the needle member 5C has a needle member connecting portion that projects into the first connecting chamber 61C, and the needle member connecting portion is formed with a second hanging portion, and the movable connecting member 6C has a second supporting portion toward the first connecting chamber 61C.
  • the lever member 4C tends to move in the valve opening direction to abut the second suspension portion and the second support portion, the movable connecting member 6C can hangably support the needle member 5C and drive the needle member 5C to move in the valve opening direction.
  • the movable connecting member 6C and the needle member 5C are also synchronously displaced, that is, at In this process, the relative displacement between the screw member 4C, the movable connecting member 6C, the valve needle member 5C, and the elastic member 7C does not occur, and it can be regarded as a whole movement.
  • the valve closing state 2 that is, during the state in which the state shown in Fig. 16 is moved to the state shown in Fig. 17, since the screw member 4C moves downward in the valve closing direction, the movable connecting member 6C is under the action of the elastic member 7C.
  • the screw member 4C moving toward the valve closing direction
  • the elastic member 7C can be regarded as a whole moving toward the valve closing direction with respect to the valve needle member 5C.
  • the movable connecting member 6C and the stopper on the needle hand member 5C just abut.
  • the elastic member 7C does not generate an elastic force that urges the needle hand member 5C in the valve port portion 21C direction.
  • the needle member 5C is disposed in the valve sleeve 2C, and in order to better ensure the coaxiality of the needle member 5C during the above movement, when the needle member 5C moves in the axial direction, the valve sleeve 2C
  • the inner wall can be guided as a guide.
  • the movable connecting member 6C is integrally provided in the valve sleeve 2C, and when the movable connecting member 6C is moved in the axial direction, the inner wall of the valve sleeve 2C can also be guided as a guide portion.
  • the movable connecting member 6C may not be provided in the valve sleeve 2C.
  • the movable connecting member 6C includes a connecting body 62C having an upper opening portion and a lower opening portion and a lower member 64C fixed to the lower opening portion, and the connecting body 62C and the lower member 64C are the first in the embodiment.
  • the chamber 61C is connected.
  • the connecting body 62C is specifically designed as a cylindrical structure having a stepped through hole, and includes a small-diameter cylindrical portion 621C that is sleeved on the screw member 4C, and a large diameter that is bent outward from the small-diameter cylindrical portion 621C and bent downward.
  • the large diameter cylindrical portion 622C and the lower member 64C surround the first connection chamber 61C in the embodiment.
  • the large-diameter cylinder portion 622C and the small-diameter cylinder portion 621C together form a first step portion 623C which is the first suspension portion in the embodiment, specifically, the lower end surface portion thereof is used with the screw member 4C.
  • the first support portion abuts.
  • the lower end of the elastic member 7C is sleeved on the outer circumference of the small-diameter cylinder portion 621C and abuts against the first step portion 623C.
  • the first step portion 623C abuts against the first support portion of the screw member 4C, and the screw member 4C suspends the movable connecting member 6C.
  • the connecting body 62C is not provided with the small-diameter cylindrical portion 621C.
  • the arrangement of the small-diameter cylindrical portion 621C has a certain guiding effect on the elastic member 7C.
  • the lower member 64C is fixed to the lower opening portion of the connecting body 62C by welding.
  • the lower member 64C includes a first annular set having a through hole formed with the second support portion in the embodiment, specifically, in the process of the electronic expansion valve being in the open state and the closed state The upper end surface portion abuts against the second suspension portion on the needle member 5C, and the lower end surface portion abuts against the stopper portion on the needle hand member 5C during the valve closing state 2 and the valve closing state 3.
  • the screw member 4C includes a screw 41C and a first engaging member 42C that is sleeved and fixed to the lower end of the screw 41C.
  • the screw member connecting portion of the embodiment includes the first engaging portion.
  • the first engaging member 42C is a second annular sleeve that is sleeved and fixed to the lower end portion of the screw member, and the second annular sleeve is formed with the first supporting portion in the embodiment, specifically, as shown in FIG. It is shown that the upper end surface portion of the second ring set abuts against the lower end surface of the first step portion 623C.
  • the screw 41C is further provided with a spring supporting portion 411C.
  • the spring supporting portion 411C is disposed outside the movable connecting member 6C and above the movable connecting member 6C, specifically, a second radial protruding portion formed by the screw 41C extending in the radial direction.
  • the other end of the elastic member 7C abuts against the lower end surface of the second radial projection.
  • a washer 53C is attached to the lower end surface of the second radial projection.
  • the upper end of the elastic member 7C directly abuts against the lower end surface portion of the washer 53C, and further abuts against the second radial projection.
  • the function of the washer 53C is to reduce the frictional force between the screw 41C and the elastic member 7C, thereby reducing the friction between the needle 51C and the screw 41C, and preventing the needle 51C from rotating with the screw 41C. It can be understood that the foregoing washer 53C can also be disposed on the first step portion 623C, and the lower end of the elastic member 7C directly abuts against the washer 53C, and can also function as the washer 53C, or in the second radial projection. A washer 53C is provided on both the lower end surface portion and the first step portion 623C.
  • the needle member 5C includes a valve needle 51C, which in turn includes a main body portion 511C, a flow regulating portion 512C disposed below the main body portion 511C and in contact with or separated from the valve port portion 21C, and a setting The rod portion 513C above the main body portion 511C.
  • the main body portion 511C may be guided by the inner wall of the valve core sleeve 2C as a guide portion, and the main body portion 511C and the rod portion 513C together form a second step portion 514C.
  • the second step portion 514C forms a stopper in the present embodiment.
  • the axial distance between the second step portion 514C and the lower end surface portion of the lower member 64C is the preset displacement amount t 3 in the present embodiment.
  • the valve needle member connecting portion in the present embodiment includes a portion in which the rod portion 513C protrudes into the first connecting chamber 61C in the state of FIG.
  • the upper end portion of the rod portion 513C extends in the radial direction to form a first radial protrusion portion 5131C which is the second suspension portion in the embodiment, and the lower end surface portion thereof is connectable to the movable connecting member 6C
  • the upper end surface portion of the lower member 64C abuts to enable the movable connecting member 6C to hangably support the needle hand member 5C.
  • the second suspension portion in this embodiment is directly formed integrally with the valve needle 51C, and the second suspension portion can also refer to the formation manner of the second suspension portion in the first embodiment, that is, at the valve needle 51C.
  • a second engaging member having the same structure in the first embodiment is disposed on the outer circumference of the rod portion 513C.
  • the first support portion and the second suspension portion may not be formed in the above-mentioned structure, and the two may be configured to cooperate with the corresponding structure to achieve the above connection requirement, for example, the C-type insertion may be specifically configured. Pieces and other structures.
  • the lower member 64C and the rod portion 513C engaged therewith have a predetermined radial displacement amount, that is, the rod portion 513C is located between the second radial boss 5131C and the main body portion 511C.
  • a predetermined amount of radial displacement between the portion and the lower member 64C so that the lower member 64C and the rod portion 513C can have a certain displacement movable space in the radial direction, and the valve needle member 5C can automatically adjust the center to make the valve needle
  • the flow rate adjusting portion 512C of the 51C can better cooperate with the valve port portion 21C.
  • a predetermined radial displacement amount is also provided between the screw shaft 41C and the small-diameter cylinder portion 611C of the coupling body 61C mated thereto, so that the two can also adaptively adjust the center.
  • the specific structure of the screw member 4C, the needle member 5C and the movable connecting member 6C in the present embodiment has been described in detail above.
  • the electronic expansion valve of the present embodiment is opened from the valve opening state shown in Fig. 15 to Fig. 18 in conjunction with Fig. 24 .
  • the operation of the valve closed state shown in detail will be described in detail.
  • the electronic expansion valve is in an open state in which the valve needle 51C is separated from the valve port portion 21C.
  • the first engaging member 42C of the screw member 4C abuts against the first step portion 623C of the connecting body 62C of the movable connecting member 6C, so that the screw member 4C suspends the movable connecting member 6C.
  • the lower end surface portion of the first radial projection 5131C on the stem portion 513C of the needle 51C abuts against the upper end surface portion of the lower member 64C of the movable connecting member 6C, thereby supporting the needle member 5C by the movable connecting member 6C.
  • the screw member 4C is driven by the rotor member 3C of the electronic expansion valve to move in the valve closing direction until the flow rate adjusting portion 512C of the valve needle 51C comes into close contact with the valve port portion 21C to close the valve port portion 21C (ie, When the valve closing state 1) shown in Fig. 16 is reached, the screw member 4C, the movable connecting member 6C, the elastic member 7C, and the valve needle member 5C can be seen as a whole and move in the axial direction toward the valve closing direction, four The positional relationship between them remains the same.
  • the lower end surface portion of the movable connecting member 6C and the second step portion 514C are maintained in the axial direction by a predetermined displacement amount t 3 .
  • the elastic member 7C does not generate an elastic force that urges the needle 51C toward the valve port portion 21C, and the valve needle 51C closes the valve port portion 21C by its own weight. At this time, even if the needle 51C rotates, the valve port portion 21C receives only the frictional force caused by the weight portion of the needle member 5C, and the wear of the contact surface between the needle 51C and the valve port portion 21C is small.
  • the screw member 4C is in the closed state 2 when the displacement amount in the valve closing direction is less than or equal to the preset displacement amount t 3 on the basis of the valve closing state 1 shown in FIG. 16 .
  • the screw member 4C, the elastic member 7C, and the movable connecting member 6C can be regarded as a whole that tends to move downward in the valve closing direction to be axially displaced with respect to the needle member 5C.
  • the elastic member 7C does not generate an elastic force that urges the needle 51C toward the valve port portion 21C, and the valve needle 51C and the valve port portion 21C are also not affected by the elastic force of the elastic member 7C.
  • the wear between the needle 51C and the valve port portion 21C is generated by the gravity of the needle member 5C, and the degree of wear is small.
  • the lower end surface portion of the lower member 64C of the member 6C abuts on the second step portion 514C of the valve needle 51C, and therefore, when the screw member 4C moves in the axial direction toward the valve closing direction, the spring support portion 411C thereon
  • the two radial projections continue to urge the elastic member 7C to move in the axial direction toward the valve closing direction, the axial relative displacement between the screw member 4C and the movable connecting member 6C, and the screw member 4C support the movable connection without being suspended.
  • Component 6C Component 6C.
  • the elastic member 7C is elastically deformed by the depression of the screw member 4C, and its elastic force is transmitted to the valve needle 51C through the movable connecting member 6C, that is, the elastic member 7C generates an elastic force for pushing the needle 51C toward the valve port portion 21C. This elastic force causes the valve needle 51C to seal the valve port portion 21C more reliably, and to ensure the valve's current interruption.
  • valve closing process of the electronic expansion valve is the same as when the valve needle 51C is separated from the valve port portion 21C during the valve opening process, and the friction between the valve needle 51C and the valve port portion 21C at the moment when the two are separated. Only the valve needle member 5C is caused by its own weight, and even if it is repeatedly operated, the amount of wear of the contact surface between the valve needle 51C and the valve port portion 21C is extremely small.
  • the electronic expansion valve of the present embodiment is in the process of closing the valve port portion 21C at the instant when the valve needle 51C is closed, and the valve needle 51C and the valve port portion 21C, and the valve needle 51C and the valve during the valve closing state 2
  • the frictional force between the mouth portions 21C is only the force caused by the self-weight portion of the needle member 5C, so that the wear between the contact faces of the valve needle 51C and the valve port portion 21C during the repeated operation of the electronic expansion valve is It is extremely small, which reduces internal leakage when the electronic expansion valve is in the closed state.
  • valve needle 51C, the second engaging member 52C, the washer 53C, the elastic member 7C, the connecting body 62C, the lower member 64C, the screw 41C, and the first engaging member 42C are processed as described above in the above-described FIGS. 14 to 18.
  • the processed valve needle includes a main body portion 511C, a flow rate adjusting portion 512C and a rod portion 513C.
  • the main body portion and the rod portion together form a second step portion 514C, which serves as a stopper portion in the present embodiment, and a valve
  • the upper end portion of the rod portion 513C of the needle protrudes in the radial direction to form the second hanging portion in the present embodiment.
  • Step S1 specifically includes the following steps:
  • the lower member 64C is sleeved on the outer peripheral portion of the valve needle 51C to form a first sub-assembly, and, in particular, the lower member 64C is located between the second suspension portion and the stop portion of the valve needle;
  • the elastic member 7C is sleeved on the outer peripheral portion of the screw 41C, and the upper end of the elastic member 7C abuts against the second radial projection (i.e., the spring support portion) on the screw member.
  • the lower end portion of the screw 41C is inserted into the connecting body 62C and the lower end of the elastic member 7C abuts on the first step portion 623C of the connecting body 62C, and the first engaging member 42C is fixed to the lower end portion of the screw rod 42C to form Second subassembly
  • the lower member 64C is fixedly coupled to the lower opening of the connecting body 62C to form a first component.
  • the S2V lower valve body 13C and the valve sleeve 2C and the first and second joints are fixed by welding to form a second component.
  • the lower valve body 13C, the valve core sleeve 2C, the first nozzle and the second nozzle are fixed together by welding once.
  • the valve core sleeve 2C is placed in the lower valve body 13C and the lower end portion thereof protrudes from the lower valve body 13C, the second joint tube is welded to the outer periphery of the lower end portion of the valve core sleeve 2C, and the first joint tube is welded to the lower valve.
  • the side wall of the body 13C is used to form a second component.
  • valve needle 51C in the first assembly is extended into the valve core sleeve 2C, so that the valve needle 51C and the connecting body 64C are in clearance with the valve core sleeve 2C, so that the valve needle 51C and the connecting body 64C move axially.
  • the spool 2C is capable of guiding both.
  • the nut member 8C is sleeved on the outer circumference of the screw shaft 41C and screwed with the screw rod 41C; the nut member 8C is welded and fixed to the lower valve body 13C;
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • Figure 19 is a cross-sectional view showing a fourth embodiment of the electronic expansion valve according to the present invention, in which the valve is in a fully open state
  • Figure 20 is a partial enlarged view of the portion I 2 in Figure 19
  • Figure 21 is an electronic expansion valve shown in Figure 19.
  • FIG. 22 is a partial enlarged view of the I 4 portion of the electronic expansion valve of FIG. 19 in the closed state
  • FIG. 23 is a partial enlarged view of the I 4 portion of the electronic expansion valve shown in FIG. A partial enlarged view of the I 4 portion at the third valve closing state.
  • the valve fully open state shown in FIG. 19 is defined as the "open valve state".
  • the screw member 4D and the movable connecting member 6D still have a relatively movable distance in the axial direction, and are marked.
  • It is t 4 that is, the “preset displacement amount” described in the present embodiment; the state when the valve needle member 5D closes the valve port portion 21D is “closed valve state one”, as shown in FIG. 21, at this time, the wire
  • the lever member 4D and the movable connecting member 6D still have a relatively movable distance t 4 in the axial direction; an axial displacement defined from the "closed valve state one" shown in Fig.
  • FIG. 21 to the movement of the screw member 4D toward the valve closing direction is defined.
  • the amount is less than or equal to the preset displacement amount t 4 during the period of "closed valve state 2"
  • the amount of axial displacement in the valve closing direction is greater than the period of the preset displacement amount t 4 , it is "closed valve state three", as shown in FIG.
  • the electronic expansion valve includes a valve body member 1D having a valve chamber 11D, a valve core sleeve 2D, a rotor member 3D, a screw member 4D and a valve needle member 5D, and a nut member 8D.
  • the valve body member 1D includes an upper valve body 12D and a lower valve body 13D, and a lower connection body is connected to the lower valve body 13D, and the upper valve body 12D and the lower valve body 13D are fixedly coupled to form a valve chamber 11D.
  • the rotor member 3D, the screw member 4D, and the valve needle member 5D are disposed in the valve chamber 11D.
  • the valve sleeve 2D is provided with a valve port portion 21D and is welded and fixed to the lower valve body 13D.
  • the lower end portion of the valve core sleeve 2D projects from the valve chamber 11D and is connected to the second nozzle. That is, in the present embodiment, the valve sleeve 2D is partially disposed in the valve chamber 11D.
  • the needle member 5D is disposed in the valve sleeve 2D and is in contact with or separated from the valve port portion 21D.
  • the rotor member 3D includes a rotor 31D and a connecting seat 32D fixedly coupled to the rotor 31D and a stopper lever 33D fixedly coupled to the connecting seat 32D.
  • the nut member 8D includes a nut 81D having an internally threaded hole fixedly coupled to the lower valve body 13D via the connecting piece 84D, a spring rail 82D fixed to the outer peripheral portion of the nut 81D, and a slip ring 83D, and the slip ring 83D is available on the spring rail 82D.
  • the upper side slides in the axial direction.
  • the nut member 8D further includes an upper stop portion and a lower stop portion.
  • the screw member 4D provided in the valve chamber 11D is fixedly coupled to the upper end portion of the rotor member 3D, and the external thread of the screw member 4D is engaged with the female screw hole of the nut member 8D fixed to the valve body member 1D.
  • the component 4D includes a first support portion.
  • the movable connecting member 6D is suspendedly supported by the screw member 4D.
  • the movable connecting member 6D includes a second supporting portion and a first hanging portion that can be supported by the first supporting portion.
  • the needle member 5D is suspendedly supported by the movable connecting member 6D, and specifically, the needle member 5D includes a second hanging portion supported by the second supporting portion of the movable connecting member 6D.
  • the elastic member 7D is provided outside the movable connecting member 6D, and one end thereof abuts against the movable connecting member 6D, and the other end abuts against the screw member 4D.
  • the screw member 4D suspends the movable connecting member 6D and can drive the movable connecting member 6D moves in the axial direction, the movable connecting member 6D hangs to support the needle member 5D and can move the needle member 5D in the axial direction; when the valve needle member 5D closes the valve port portion 21D, the screw member 4D tends to close the valve direction
  • the elastic member 7D does not generate an elastic force that urges the needle hand member 5D toward the valve port portion 21D; when the valve needle member 5D closes the valve port portion 21D, the screw member 4D tends to close the valve.
  • the elastic member 7D When the direction moves by a predetermined displacement or more, the elastic member 7D generates an elastic force that urges the needle member 5D toward the valve port portion 21D.
  • the screw member 4D is moved downward, and the elastic member 7D and the movable connecting member 6D are relatively opposed to the screw member 4D.
  • the needle member 5D moves in the axial direction toward the valve closing direction within the range of the preset displacement amount t 4 .
  • the elastic member 7D does not generate an elastic force that urges the needle member 5D in the valve closing direction.
  • the elastic member 7D With the relative movement, the elastic member 7D is compressed and deformed by the downward movement of the screw member 4D, and its elastic force is transmitted to the valve needle member 5D through the movable connecting member 6D, that is, the elastic member 7D generates the valve needle during the process.
  • the needle member 5D in order to better ensure the coaxiality of the needle member 5D during the above-described moving process, the needle member 5D is disposed in the valve sleeve 2D, and when the needle member 5D reciprocates in the axial direction, the spool sleeve The inner wall of the 2D can be guided as a guide.
  • the movable connecting member 6D is also disposed substantially in the valve sleeve 2D, and the inner wall of the valve sleeve 2D can also be guided as a guide portion when the movable connecting member 6D reciprocates in the axial direction.
  • the upper end of the movable connecting member 6D has a small portion extending from the valve core sleeve, and therefore, in order to avoid ambiguity, the term “roughly” will be used. It will be understood by those skilled in the art that it is also possible that the movable connecting member 6D in this embodiment is completely disposed in the valve core sleeve 2D. It is to be understood that the lower end portion of the needle member 5D can also extend out of the valve sleeve 2D as long as the object of the present invention can be achieved.
  • the screw member 4D includes a screw 41D and a first engaging member 42D that is sleeved and fixed to the lower end of the screw 41D.
  • the screw 41D and the first engaging member 42D together form a first The chamber 43D is connected.
  • the first engaging member 42D is formed with a first supporting portion.
  • the lower end portion of the screw 41D is a first annular boss 411D extending along the radial direction of the screw 41D
  • the first engaging member 42D is a tube having a middle through hole that cooperates with the first annular boss 411D.
  • the upper end portion of the tubular member is sleeved on a peripheral portion of the first annular boss and welded and fixed thereto.
  • the lower end portion of the tubular member has a tapered shape to form a first flange portion 421D that protrudes inward, and the first flange portion 421D serves as a first support portion in the present embodiment.
  • the other end of the elastic member 7D abuts against the lower end surface of the first engaging member 42D.
  • a washer 53D is disposed between the upper end of the elastic member 7D and the first engaging member 42D.
  • the movable connecting member 6D includes a connecting body 62D which is large in a rod shape, and a lower member including a first member 64D fixed to a lower end portion of the connecting body 62D and a resilient member 7D and The second member 63D between the first members 64D.
  • the first member 64D is formed with a second support portion, and the second member 63D is formed with a pressing portion.
  • the lower end of the elastic member 7D abuts against the pressing portion, and the lower end surface of the second member 64D abuts against the upper end surface of the first member 63D.
  • the first member 64D and the second member 63D may be fixedly connected by welding or the like, or may be two independent components separated from each other in a non-assembled state.
  • the connecting body 62D is specifically designed to include a large diameter section 621D, a small diameter section 622D extending from the lower end surface portion of the large diameter section 621D in the axial direction toward the valve opening portion 21D, and extending into the first connection.
  • the large diameter section 621D and the small diameter section 622D together form a first step portion 624D.
  • the upper end of the suspension section 623D protrudes in the radial direction to form the second flange portion 6231D, that is, the suspension section 623D has a downwardly large and small inverted tapered structure, and the second flange portion 6231D can be used as the first suspension portion in this embodiment.
  • the first member 64D of the lower member is specifically designed as a first annular member having an axial through hole which is sleeved on the outer periphery of the lower end portion of the small diameter portion 622D of the connecting body 62D and fixedly connected thereto by welding.
  • the first ring member is formed with the first support portion in the present embodiment, and specifically, the upper end surface portion directly abuts against the second suspension portion of the valve body member 5D for support.
  • the second member 63D of the lower member is sleeved on the outer peripheral portion of the connecting body 62D, and specifically includes a straight cylindrical portion 631D that cooperates with the small diameter portion 622D of the connecting body 62D and a first radial convex portion that extends radially from the outer wall of the straight cylindrical portion 631D.
  • the outlet portion 632D, the first radial projection portion 632D forms the pressing portion in this embodiment.
  • the upper end surface of the second member 63D abuts against the first step portion 624D
  • the elastic member 7D is sleeved on the outer peripheral portion of the large diameter portion 621D
  • one end of the elastic member 7D abuts against the upper end surface portion of the first radial projection portion 624D.
  • the lower end surface of the first radial projection 624D can abut or separate from the stopper on the needle member 5D.
  • the screw member 4D hangs to support the movable connecting member 6D, and the movable connecting member 6D hangsly supports the valve needle member 5D.
  • the first radial projection The distance between the lower end surface of the portion 624D and the upper end surface of the stopper portion is the "preset displacement amount t 4 " described in the embodiment. It is to be understood that the aforementioned washer 53D may also be disposed between the lower end of the elastic member 7D and the upper end surface of the first radial projection 624D. Alternatively, it is also possible to provide a gasket 53D between the upper end of the elastic member 7D and the lower end surface of the first engaging member 42D and between the lower end of the elastic member 7D and the upper end surface of the first radial projection 624D. The action of the washer 53D is the same as that of the washer in each of the foregoing embodiments, and the description thereof will not be repeated.
  • the needle member 5D includes a valve needle 51D and a second engaging member 52D fixedly coupled to the valve needle 51D.
  • the valve needle 51D specifically includes a main body portion 511D having an open cavity, and a flow rate adjusting portion 512D provided below the main body portion 511D and in contact with or separated from the valve port portion 21D.
  • the main body portion 511D can be guided by the inner wall of the valve core sleeve 2D as a guide portion.
  • the second engaging member 52D is formed with the stopper portion of the embodiment.
  • the second engaging member 52D is the first radial protruding portion 624D (the pressing portion) of the second member 63D.
  • An annular set with the first member 64D is fixedly coupled to the opening of the main body portion 511D, the lower end portion of which extends into the open cavity 5111D, and forms a second connecting cavity 524D with the valve needle 51D.
  • the upper end surface portion of the second engaging member 52D serves as a stopper portion that cooperates with the thrust portion of the second member 63D in the present embodiment. It will then be appreciated that the first member 64D of the movable connecting member 6D is placed in the second connecting chamber 524D.
  • the second engaging member 52D is formed with the second hanging portion in the present embodiment.
  • the lower end surface portion of the second engaging member 52D is engaged with the second supporting portion as the second hanging portion.
  • the second engaging member 52D and the small diameter portion 622D of the connecting body 62D have a predetermined radial displacement amount, that is, the second engaging member 52D can have a radial direction relative to the small diameter portion 622D.
  • the displacement of the movable space is such that the needle member 5D can automatically adjust the center so that the flow regulating portion 512D of the needle member 5D can fit well with the valve port portion 21D.
  • the specific structure of the screw member 4D, the valve needle member 5D and the movable connecting member 6D in the present embodiment has been described in detail above.
  • the electronic expansion valve of the present embodiment is opened from the valve opening state shown in FIG. 20 to FIG. 23 with reference to FIG. The operation of the valve closed state shown in detail will be described in detail.
  • valve opening state shown in Fig. 20 to the valve closing state shown in Fig. 21 is as follows:
  • the electronic expansion valve is in an open state in which the valve needle 51D is separated from the valve port portion 21D.
  • the first flange portion 421D of the first engaging member 42D of the screw member 4D suspends the second flange portion 6231D supporting the suspension portion 623D of the connection body 62D, thereby suspending the screw member 4D
  • the movable connecting member 6D is supported by the ground.
  • the upper end surface portion of the first member 64D abuts against the lower end surface of the second engaging member 52D, that is, the second support portion supports the second hanging portion, so that the movable connecting member 6D hangs to support the needle hand member 5D.
  • the preset displacement amount t 4 is maintained between the first radial projection 632D (the pressing portion) of the second member 63D and the stopper portion of the second engaging member 52D.
  • the screw member 4D is driven by the rotor member 3D of the electronic expansion valve to move in the valve closing direction until the flow regulating portion 512D of the needle 51D comes into contact with the valve port portion 21D to close the valve port portion 21D, that is, to reach In the process of the valve closing state shown in Fig. 21, the screw member 4D, the movable connecting member 6D, the elastic member 7D, and the valve needle member 5D can be seen as a whole moving together in the axial direction toward the valve closing direction, the screw member The relative positional relationship of the 4D, the movable connecting member 6D, the needle member 5D, and the needle member 5D coincides with the valve opening state shown in FIG.
  • valve port portion 21D Due to the elastic force, even if the needle 51D rotates, the valve port portion 21D receives only the frictional force caused by the weight portion of the needle member 5D, and the wear of the contact surface of the valve needle 51D and the valve port portion 21D is small.
  • valve closing state 1 shown in FIG. 21 The operation process of the valve closing state 1 shown in FIG. 21 to the valve closing state 2 shown in FIG. 22 is as follows:
  • the screw member 4D is further driven to move in the axial direction toward the valve closing direction by the rotor member 3D, and the screw member 4D pushes the elastic member 7D, and the elastic member 7D pushes the movable connection.
  • the member 6D is moved downward until the first radial projection 624D as the pressing portion of the second member 64D abuts against the upper end portion of the second engaging member 52D as a stopper, that is, moves to the position shown in FIG. The end of the closed valve state II.
  • Fig. 22 is a view showing a state in which the displacement amount of the screw member 4D is equal to the preset displacement amount t 4 , and the first radial projection 624D is in contact with the upper end portion of the second engaging member 52D as a stopper but The moment when no force is applied to it.
  • the screw member 4D pushes the elastic member 7D, and when the elastic member 7D pushes the movable connecting member 6D downward, the movable connecting member 6D and the needle member 5D are axially displaced relative to each other, that is, the needle member 5D
  • the position at which the valve closing state is maintained by the self-gravity is not changed, and the elastic member 7D does not exert a force on the needle member 5D, and does not generate an elastic force that urges the needle member 5D toward the valve port portion 21D. That is, the contact surface between the valve needle 51D and the valve port portion 21D is not affected by the elastic force of the elastic member 7D.
  • valve port portion 21D is only subjected to the frictional force caused by the weight portion of the needle member 5D, which wears the contact surface of the valve needle 51D and the valve port portion 21D. Very small.
  • valve closing state 2 shown in Fig. 22 The operation from the valve closing state 2 shown in Fig. 22 to the valve closing state 3 shown in Fig. 23 is as follows:
  • the screw member 4D is further driven to move downward in the valve closing direction by the rotor member 3D, due to the first radial projection 624D of the second member 64D (push The pressing portion) abuts against the upper end surface portion (stop portion) on the second engaging member 52D, so that the screw member 4D and the elastic member 7D are axially displaced with respect to the movable connecting member 6D during the downward movement of the screw member 4D.
  • the elastic member 7D is compressed and deformed to generate an elastic force for pressing the valve needle 51D toward the valve port portion 21D, and the elastic force causes the valve needle 51D to more reliably seal the valve port portion 21D and close the valve port portion 21D. To ensure the shut-off of the valve.
  • valve closing process of the electronic expansion valve is the same as when the valve needle 51D is separated from the valve port portion 21D during the valve opening process, and the friction between the valve needle 51D and the valve port portion 21D at the moment when the two are separated. Only the self-weight of the needle member 5D is caused, and even if the operation is repeated, the amount of wear of the contact surface between the needle 51D and the valve port portion 21D is extremely small.
  • the electronic expansion valve of the present embodiment is in the process of closing the valve port portion 21D at the moment when the valve needle 51D is closed and the valve needle 51D is separated from the valve port portion 21D, and the valve needle 51D and the valve during the valve closing state 2
  • the frictional force between the mouth portions 21D is only the force caused by the self-weight portion of the needle hand member 5D, so that the wear between the contact faces of the valve needle 51D and the valve port portion 21D during the repeated operation of the electronic expansion valve is also It is extremely small, which reduces internal leakage when the electronic expansion valve is in the closed state.
  • valve needle 51D of the structure shown in FIG. 8 is processed, the second engaging member 52D, the washer 53D, the elastic member 7D, the connecting body 62D, the second member 63D, the first member 64D, the screw 41D, and the first engaging member.
  • Step S1 specifically includes the following steps:
  • one end of the small diameter section 622D of the connection body 62D is passed through the first engaging member 42D, after which the seat 53D, the elastic member 7D, the second member 63D, the second engaging member 52D and the first member 64DD will be placed.
  • the large diameter section 621D and the large diameter section 622D are connected to the connecting body to form a first sub-assembly. It should be noted in this step that this step can also pass one end of the small diameter section 622D of the connecting body 62D through the first engaging member 42D, and sequentially the elastic element 7D, the washer 53D, the second member 63D, and the second engaging member.
  • the 52D and the first member 64DD are sleeved to the large diameter section 621D and the large diameter section 622D of the connecting body to form a first subassembly; or one end of the small diameter section 622D of the connection body 62D may be passed through the first engaging component 42D.
  • the washer 53D, the elastic member 7D, the washer 53D, the second member 63D, the second engaging member 52D, and the first member 64DD are sequentially sleeved to the large diameter section 621D and the large diameter section 622D of the connecting body to form a first subassembly. That is, it is also possible to provide two washers 53D.
  • the first engaging member 52D of the first sub-assembly is welded and fixedly connected with the screw 41D and forms a first connecting cavity 43D
  • the second engaging member 52D of the first sub-assembly and the main body of the valve pin 51D The 511D solder is fixedly connected and forms a second connection cavity 524D. In this step, the formation of the first connection cavity 43D and the second connection cavity 524D is not in order.
  • the lower valve body 13D and the valve core sleeve 2D and the first nozzle and the second joint tube are fixed by furnace welding to form a second component.
  • furnace welding furnace welding
  • other welding methods can also be used to connect the parts.
  • the valve core sleeve 2D is placed in the lower valve body 13D and the lower end portion thereof protrudes from the lower valve body 13D, the second joint tube is welded to the outer periphery of the lower end portion of the valve core sleeve 2D, and the first joint tube is welded to the lower valve.
  • the side wall of the body 13D is used to form a second component.
  • the first component is extended from the lower end of the valve needle 51D into the valve core sleeve 2D, so that the main body portion 511D of the valve needle and the second engaging member 42D of the screw member 4D are clearance-fitted with the valve core sleeve 2D to make the valve needle
  • the screw member 4D is axially moved by the 51D and the screw member 4D, the inner wall of the valve sleeve 2D can be guided as a guide portion.
  • the nut member 8D is sleeved on the outer circumference of the screw rod 41D and welded and fixed to the screw rod 41; the nut member 8D is welded and fixed to the lower valve body 13D;
  • the valve mouth portion of the electronic expansion valve is disposed on the valve core sleeve.
  • the valve core sleeve is a cylindrical structure having a core cavity, and the valve core sleeve is fixed to the valve body member.
  • a flow port 22A, 22B, 22C, 22D communicating the inner space of the valve core sleeve and the outer space of the valve sleeve is further provided, so that the valve mouth portion is in an open state, and the electronic expansion valve is The fluid inlet and the fluid outlet can communicate through the valve port and the flow port.
  • valve sleeve and the nut member can also be fixed to improve the coaxiality between the nut member and the valve sleeve, thereby controlling the coaxiality between the screw member and the valve sleeve.
  • valve port portion may be directly opened on the lower valve body or a separate component may be provided and a valve port portion may be opened thereon, and a separate valve core sleeve is disposed inside the valve body member for each movable connecting member. Guided with the valve needle assembly.
  • valve sleeve of each embodiment may not be directly fixed to the valve body member, but the valve core sleeve is fixed to other components, and the other components are fixedly connected with the valve body member.
  • valve needle member and the movable connecting member may be disposed in the valve core sleeve, or may be partially disposed in the valve core sleeve, or one of them may be disposed in the valve core sleeve, and the other One is not located in the valve sleeve.
  • the elastic member in each of the above embodiments may specifically be a compression spring.
  • the foregoing assembling method of the electronic expansion valve of the present invention is exemplified to understand the technical solution of the present invention, and it can be understood that the above steps are numbered only for clearly explaining the assembly steps of the electronic expansion valve, each numbered The size relationship does not represent the order relationship between the steps. As long as the assembly of the electronic expansion valve can be realized, the order relationship between the steps can be flexibly adjusted as needed.

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Abstract

一种电子膨胀阀及其组装方法,该电子膨胀阀包括丝杆部件,活动连接部件,阀针部件,弹性元件,所述弹性元件设置于所述活动连接部件的外部,所述弹性元件的一端与所述活动连接部件抵接,另一端与所述阀针部件抵接,当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向移动预设位移量期间,所述弹性元件不产生将所述阀针部件向所述阀口部推压的弹性力,当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向移动预设位移量以上时,所述弹性元件产生将所述阀针部件向所述阀口部推压的弹性力,该电子膨胀阀能够减少阀针与阀口部接触部位的磨损,减少闭阀时的内泄漏。

Description

一种电子膨胀阀及其组装方法
本申请要求于2017年1月18日提交中国专利局、申请号为201710037808.0、发明名称为“一种电子膨胀阀”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
本发明涉及流体控制技术领域,特别是涉及一种电子膨胀阀及其组装方法。
背景技术
电子膨胀阀作为组成制冷系统的重要部件,广泛应用于大型冷冻机组、大型冷库、超市冷柜等。
背景技术中的一种电子膨胀阀,大体包括阀体部件、转子部件、丝杆部件、阀针部件,通过转子部件的旋转驱动使丝杆部件作用于阀针部件,从而使阀针部件远离或接近阀口部,实现电子膨胀阀的流量调节功能。该电子膨胀阀,其阀针从位于阀口部开始至阀针被充分推压到阀口部部位的这一过程中,阀针与阀口部的接触位置始终会发生相对旋转,造成两者的接触面被磨损,而且,阀针与阀口部分离的瞬间二者之间也相对旋转而产生摩擦,特别是在阀针反复动作的情况下,阀针与阀口部部位的接触面的磨损会进一步加剧,可能造成阀口部在闭阀闭状态下泄漏的现象,导致阀性能不良。
因此,如何减少阀针部件与阀口部的接触部位之间的磨损,降低电子膨胀阀的内泄漏率是本专利申请人想要解决的技术问题。
发明内容
本发明的目的是提供一种电子膨胀阀,减少阀针与阀口部接触面的磨损,从而降低电子膨胀阀在阀口部闭阀状态下的内泄漏。
本发明的另一目的是提供一种具有上述功能的电子膨胀阀的组装方法。
本发明提供的一种电子膨胀阀的技术方案,包括:
阀体部件,所述阀体部件具有阀腔;
转子部件,所述转子部件设置于所述阀腔中;
丝杆部件,所述丝杆部件能够由所述转子部件驱动相对于所述阀体部件的轴向移动,所述丝杆部件包括第一支撑部;
活动连接部件,所述活动连接部件包括第二支撑部和第一悬挂部;
阀针部件,所述阀针部件能够远离或接近阀口部以调节所述电子膨胀阀的开度,所述阀针部件包括第二悬挂部;
弹性元件,所述弹性元件设置于所述活动连接部件的外部,所述弹性元件的一端与所述活动连接部件抵接,另一端与所述阀针部件抵接;
所述第一支撑部能够悬挂地支撑所述第一悬挂部,所述第二支撑部能够悬挂地支撑所述第二悬挂部;
当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向移动预设位移量期间,所述弹性元件不产生将所述阀针部件向所述阀口部推压的弹性力;
当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向移动预设位移量以上时,所述弹性元件产生将所述阀针部件向所述阀口部推压的弹性力。
本发明提供的电子膨胀阀,自阀针部件关闭阀口部开始至丝杆部件沿闭阀方向的移动位移量不超过预设位移量的期间内,弹性元件都不会产生将阀针部件推向阀口部的弹性力,只有在阀针部件关闭阀口部并且丝杆部件沿闭阀方向的移动位移量超过预设位移量后,弹性元件才对阀针部件施加将其推向阀口部的弹性力。这样,阀针部件从关闭阀口部开始至丝杆部件沿闭阀方向的移动位移量不超过预设位移量期间,阀针部件与阀口部之间产生的摩擦力是由阀针部件与活动连接部件的自身重力或仅由阀针部件自身的重力造成的力,阀针部件与阀口部接触面的磨损量很小,进而减少了电子膨胀阀的内泄漏,即便电子膨胀阀反复动作,也能够避免阀口部在闭阀状态下发生泄漏,保证阀断流性。
如上所述结构的电子膨胀阀,还包括阀芯套,所述阀芯套至少部分地设置于所述阀腔中,并与所述阀体部件固定连接;所述阀针部件和所述活 动连接部件均至少部分地设置于所述阀芯套中,所述阀芯套的内壁形成对所述活动连接部件和/或所述阀针部件导向的导向部。
如上所述结构的电子膨胀阀,所述活动连接部件具有第一连接腔,所述丝杆部件包括伸入所述第一连接腔的丝杆部件连接部,所述丝杆部件连接部形成有所述第一支撑部;
所述活动连接部件还具有设置于所述第一支撑部下方的止挡部,当所述丝杆部件趋于闭阀方向移动至所述第一支撑部与所述止挡部抵接后,所述丝杆部件能够推压所述活动连接部件趋于闭阀方向移动,以使所述弹性元件产生将所述阀针部件向所述阀口部推压的弹性力。
如上所述结构的电子膨胀阀,所述活动连接部件包括带有相互连通的上开口部和下开口部的连接本体、固定在所述上开口部的上部构件和固定在所述下开口部的下部构件;所述连接本体、所述上部构件和所述下部构件形成所述第一连接腔;
所述上部构件形成有所述第一悬挂部,所述下部构件形成有所述第二支撑部;
所述弹性元件的一端抵接所述下部构件。
如上所述结构的电子膨胀阀,所述连接本体的内壁沿径向延伸形成第一环形凸台,所述第一环形凸台形成所述止挡部;
所述上部构件包括具有通孔的第一环状件,所述第一环状件设置在所述丝杆部件的外周,所述第一环状件形成有所述第一悬挂部;
所述下部构件包括具有通孔的基件,所述基件设置在所述阀针部件的外周,所述基件的内壁沿径向延伸形成第二环形凸台,所述第二环形凸台形成所述第二支撑部。
如上所述结构的电子膨胀阀,所述阀针部件包括阀针,所述阀针包括主体部,流量调节部和杆部,所述主体部与所述杆部之间形成第一台阶部,所述弹性元件的另一端抵接于所述第一台阶部;所述阀针部件还包括第二卡合件,所述第二卡合件设置在所述杆部的外周,所述第二卡合件形成有所述第二悬挂部。
如上所述结构的电子膨胀阀,所述活动连接部件包括带有上开口部的连接本体、固定在所述上开口部的上部构件和与所述连接本体固定连接的 下部构件;
所述连接本体和所述上部构件形成所述第一连接腔,所述上部构件形成有所述第一悬挂部,所述下部构件形成有所述第二支撑部;
所述弹性元件设置于所述连接本体的外周部,所述弹性元件的一端抵接于所述连接本体。
如上所述结构的电子膨胀阀,所述连接本体包括大径段和小径段,所述大径段具有台阶面朝上的阶梯孔,所述阶梯孔的孔壁形成有第一台阶部,所述第一台阶部形成与所述止挡部;
所述大径段与所述小径段还共同形成台阶面朝下的第二台阶部,所述弹性元件的一端抵接于所述第二台阶部;
所述上部构件包括具有通孔的第一环状件,所述第一环状件设置在所述丝杆部件的外周,所述第一环状件形成有所述第一悬挂部;
所述下部构件包括具有通孔的第二环状件,所述第二环状件与所述连接本体固定连接,所述第二环状件形成有所述第二支撑部。
如上所述结构的电子膨胀阀,所述阀针部件包括阀针和第二卡合件;
所述阀针包括具有开口腔的主体部、流量调节部;
所述第二卡合件形成有第二悬挂部,所述弹性元件的另一端抵接于所述第二悬挂部;
所述第二卡合件与所述主体部固定连接并形成第二连接腔,所述第二支撑部设置于所述第二连接腔中。
如上所述结构的电子膨胀阀,所述第二卡合件包括底板部和筒部,所述底板部具有与所述连接本体的小径段配合的通孔,所述底板部形成所述第二悬挂部,所述底板部与所述筒部形成容纳凹腔,所述弹性元件的另一端置于所述容纳凹腔中并与所述底板部抵接。
如上所述结构的电子膨胀阀,所述丝杆部件包括丝杆和与所述丝杆固定连接的第一卡合件,所述丝杆部件连接部包括所述第一卡合件和所述丝杆位于所述第一连接腔中的部分;
所述第一卡合件包括位于所述上部构件与所述止挡部之间的大径环,所述大径环形成所述第一支撑部。
本发明还提供了一种具有该技术效果的电子膨胀阀的组装方法,该电 子膨胀阀包括:
阀体部件,所述阀体部件包括上阀体、下阀体,所述阀体部件具有阀腔;
阀芯套,所述阀芯套至少部分地设置于所述阀腔中;
转子部件,所述转子部件设置于所述阀腔中;
丝杆部件,所述丝杆部件包括第一支撑部;
螺母部件,套设在所述丝杆部件的外周并与所述丝杆部件螺纹连接;
阀针部件,所述阀针部件能够远离或接近阀口部以调节所述电子膨胀阀的开度,所述阀针部件包括第二悬挂部;
还包括弹性元件和活动连接部件,所述活动连接部件包括第一悬挂部和第二支撑部;
所述组装方法包括如下步骤:
S1,将所述弹性元件、所述丝杆部件、所述活动连接部件和所述阀针部件组装形成第一组件,并,所述第一组件中,所述丝杆部件悬挂地支撑所述活动连接部件,所述活动连接部件悬挂地支撑所述阀针部件,所述弹性元件设置于所述活动连接部件的外部,其一端抵接于活动连接部件,另一端抵接于所述阀针部件;
S2,所述下阀体与所述阀芯套固定连接形成第二组件;
S3,将所述第一组件的下端伸入所述阀芯套,将所述螺母部件套设至所述丝杆部件的外周使二者螺纹连接,之后,将所述螺母部件与所述下阀体固定连接;
S4,将所述丝杆部件与所述转子部件固定连接;
S5,将所述上阀体与所述下阀体固定连接。
如上所述电子膨胀阀的组装方法,所述活动连接部件包括具有相互连通的上开口部和下开口部的连接本体、上部构件和下部构件,所述连接本体具有能够与所述丝杆部件配合的止挡部,所述上部构件形成有所述第一悬挂部,所述下部构件形成有所述第二支撑部;
所述丝杆部件包括丝杆和第一卡合件,所述第一卡合件形成有所述第一支撑部;
所述阀针部件包括阀针和第二卡合件,所述第二卡合件形成所述第二 悬挂部;
则步骤S1中具体包括:
SA11,所述弹性元件、所述下部构件和所述第二卡合件设置在所述阀针的外周部,并使所述弹性元件的一端抵接所述下部构件,另一端抵接抵接所述阀针;
SA12,所述丝杆和所述第一卡合件固定连接,所述上部构件设置至所述丝杆外周部;
SA13,所述上部构件和所述下部构件分别与所述连接本体的上开口部和下开口部固定连接。
如上所述电子膨胀阀的组装方法,所述活动连接部件包括具有上开口部的连接本体、上部构件和下部构件,所述连接本体具有能够与所述丝杆部件配合的止挡部,所述上部构件形成有所述第一悬挂部,所述下部构件形成有所述第一支撑部;
所述丝杆部件包括丝杆和第一卡合件,所述第一卡合件形成有所述第一支撑部;
所述阀针部件包括阀针和第二卡合件,所述第二卡合件形成有所述第二悬挂部;
则步骤S1中具体包括:
SB11,所述弹性元件、所述第二卡合件和所述下部构件设置在所述连接本体的外周部后,将所述下部构件与所述连接本体固定连接,并使所述弹性元件的一端抵接所述连接本体,另一端抵接所述第二卡合件;
SB12,所述丝杆和所述第一卡合件固定连接,所述上部构件设置于所述丝杆外周部;
SB13,所述上部构件与所述连接本体的所述上开口部固定连接,所述阀针与所述第二卡合件固定连接。
如上所述电子膨胀阀的组装方法,步骤S3中,所述连接本体和所述阀针均与所述阀芯套之间间隙配合,所述阀芯套对所述活动连接部件和所述阀针部件进行导向。
本发明还提供了另一种电子膨胀阀的技术方案,包括:
阀体部件,所述阀体部件具有阀腔;
转子部件,所述转子部件设置于所述阀腔中;
丝杆部件,所述丝杆部件能够由所述转子部件驱动相对于所述阀体部件的轴向移动,所述丝杆部件包括第一支撑部;
活动连接部件,所述活动连接部件包括第二支撑部和第一悬挂部;
阀针部件,所述阀针部件能够远离或接近阀口部以调节所述电子膨胀阀的开度,所述阀针部件包括第二悬挂部;
弹性元件,所述弹性元件设置于所述活动连接部件的外部,所述弹性元件的一端与所述活动连接部件抵接,另一端与所述丝杆部件抵接;
所述第一支撑部能够悬挂地支撑所述第一悬挂部,所述第二支撑部能够悬挂地支撑所述第二悬挂部;
当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向运动预设位移量期间,所述弹性元件不产生将所述阀针部件向所述阀口部推压的弹性力;
当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向运动预设位移量以上时,所述弹性元件产生将所述阀针部件向所述阀口部推压的弹性力。
该技术方案的电子膨胀阀也具有同样的技术效果。
如上所述结构的电子膨胀阀,还包括阀芯套,所述阀芯套至少部分地设置于所述阀腔中,并与所述阀体部件固定连接;所述阀针部件和所述活动连接部件均至少部分地设置于所述阀芯套中,所述阀芯套的内壁形成对所述活动连接部件和/或所述阀针部件导向的导向部。
如上所述结构的电子膨胀阀,所述活动连接部件具有第一连接腔,所述丝杆部件包括伸入所述第一连接腔的丝杆部件连接部,所述丝杆部件连接部形成有所述第一支撑部;
所述阀针部件包括位于所述活动连接部件下方的止挡部,当所述丝杆部件趋于闭阀方向运动至所述活动连接部件与所述止挡部抵接后,所述弹性元件能够产生将所述阀针部件向所述阀口部推压的弹性力。
如上所述结构的电子膨胀阀,所述活动连接部件包括连接本体和下部构件;
所述连接本体具有相互连通的上开口部和下开口部,所述连接本体形成有所述第一悬挂部,所述弹性元件的一端与所述第一悬挂部抵接;
所述下部构件与所述连接本体固定连接形成所述第一连接腔,所述第一支撑部和所述第二悬挂部设置于所述第一连接腔,所述下部构件形成所述第二支撑部。
如上所述结构的电子膨胀阀,所述连接本体包括设置在所述丝杆部件外周的小径筒部,还包括用以形成所述第一连接腔的大径筒部,所述小径筒部与所述大径筒部形成第一台阶部,所述第一台阶部形成所述第一悬挂部。
如上所述结构的电子膨胀阀,所述阀针部件包括阀针,所述阀针包括主体部,流量调节部和杆部,所述主体部与所述杆部形成第二台阶部,所述第二台阶部形成所述止挡部;
所述杆部伸入所述第一连接腔的部分具有沿径向延伸形成的第一径向凸出部,所述第一径向凸出部形成所述第二悬挂部。
如上所述结构的电子膨胀阀,所述丝杆部件包括丝杆和与所述丝杆固定连接的第一卡合件,所述丝杆部件连接部包括所述第一卡合件和所述丝杆位于所述第一连接腔中的部分;
所述第一卡合件形成有所述第一支撑部;
所述丝杆的位于所述活动连接部件上方的部分设置有弹簧支撑部,所述弹性元件的另一端抵接所述弹簧支撑部。
如上所述结构的电子膨胀阀,所述弹簧支撑部包括所述丝杆沿径向延伸形成的第二径向凸出部,所述弹性元件的另一端与所述第二径向凸出部抵接。
如上所述结构的电子膨胀阀,所述阀针部件具有止挡部,所述活动连接部件具有推压部,当所述丝杆部件趋于闭阀方向移动至所述推压部与所述止挡部抵接后,所述弹性元件产生将所述阀针部件向所述阀口部推压的弹性力。
如上所述结构的电子膨胀阀,所述活动连接部件包括连接本体和下部构件,所述连接本体形成有所述第一悬挂部;
所述下部构件包括与所述连接本体固定连接的第一构件和设置于所述 第一构件与所述弹性元件之间的第二构件,所述第一构件形成有所述第二支撑部,所述第二构件形成有所述推压部,所述弹性元件的一端与所述推压部抵接。
如上所述结构的电子膨胀阀,所述丝杆部件包括丝杆和与所述丝杆固定连接的具有上开口部和下开口部的第一卡合件,所述第一卡合件形成有所述第一支撑部;所述弹性元件的另一端与所述第一卡合件抵接;
所述丝杆与所述第一卡合件固定连接形成第一连接腔,所述第一悬挂部设置于所述第一连接腔内。
如上所述结构的电子膨胀阀,所述连接本体包括与所述第二构件配合的小径段、与所述弹性元件配合的大径段和伸入所述第一连接腔的悬挂段;
所述小径段与所述大径段之间形成第一台阶部,所述第二构件与所述第一台阶部抵接;
所述悬挂段形成有所述第一悬挂部,所述第一卡合件形成有向内凸出的第一凸缘部,所述第一凸缘部形成所述第一支撑部。
如上所述结构的电子膨胀阀,所述第二构件设置于所述小径段的外周部,包括与所述小径段配合的直筒部和自所述直筒部的外壁沿径向延伸形成的第一径向凸出部,所述第一径向凸出部形成所述推压部,所述弹性元件的一端抵接所述第一径向凸出部。
如上所述结构的电子膨胀阀,所述阀针部件包括阀针和与所述阀针固定连接的第二卡合件,所述第二卡合件形成有所述第二悬挂部;所述第二悬挂部设置于所述推压部与所述第二支撑部之间,所述阀针与所述第二卡合件形成第二连接腔,所述第二支撑部设置于所述第二连接腔中。
本发明还提供了组装该结构电子膨胀阀的组装方法,该电子膨胀阀包括:
阀体部件,所述阀体部件包括上阀体、下阀体,所述阀体部件具有阀腔;
阀芯套,所述阀芯套至少部分地设置于所述阀腔中;
转子部件,所述转子部件设置于所述阀腔中;
丝杆部件,所述丝杆部件包括第一支撑部;
螺母部件,套设在所述丝杆部件的外周并与所述丝杆部件螺纹连接;
阀针部件,所述阀针部件能够远离或接近阀口部以调节所述电子膨胀阀的开度,所述阀针部件包括第二悬挂部;
还包括弹性元件和活动连接部件,所述活动连接部件包括第一悬挂部和第二支撑部;
所述组装方法包括如下步骤:
S1,将所述弹性元件、所述丝杆部件、所述活动连接部件和所述阀针部件组装形成第一组件,并,所述第一组件中,所述丝杆部件悬挂地支撑所述活动连接部件,所述活动连接部件悬挂地支撑所述阀针部件,所述弹性元件设置于所述活动连接部件的外部,其一端与所述活动连接部件抵接,另一端与所述丝杆部件抵接;
S2,所述下阀体与所述阀芯套固定连接形成第二组件;
S3,将所述第一组件的下端伸入所述阀芯套,将所述螺母部件套设至所述丝杆部件的外周使二者螺纹连接,之后,将所述螺母部件与所述下阀体固定连接;
S4,将所述丝杆部件与所述转子部件固定连接;
S5,将所述上阀体与所述下阀体固定连接。
如上所述的电子膨胀阀的组装方法,所述活动连接部件包括具有相互连通的上开口部和下开口部的连接本体、下部构件,所述连接本体形成有所述第一悬挂部,所述下部构件形成有所述第二支撑部;
所述丝杆部件包括丝杆和第一卡合件,所述丝杆包括弹簧支撑部,所述第一卡合件形成有所述第一支撑部;
所述阀针部件包括阀针,所述阀针形成有与所述上部构件配合的止挡部,所述阀针部件形成有所述第二悬挂部;
则步骤S1中具体包括:
SC11,将所述下部构件安装于所述阀针的外周部;
SC12,将所述弹性元件套设于所述丝杆部件的外周,并使所述弹性元件位于所述弹簧支撑部与所述丝杆的下端部之间;将所述丝杆的下端部穿过所述连接本体的所述上开口部与所述第一卡合件固定连接,并使所述弹性元件的一端与所述连接本体抵接,另一端与所述弹簧支撑部抵接;
SC13,所述下部构件与所述连接本体的所述下开口部固定连接。
如上所述的电子膨胀阀的组装方法,所述活动连接部件包括连接本体和下部构件,所述连接本体形成有所述第一悬挂部,所述下部构件形成有推压部和所述第二支撑部;
所述丝杆部件包括丝杆和第一卡合件,所述第一卡合件形成有所述第一支撑部;
所述阀针部件包括阀针和第二卡合件,所述第二卡合件形成有所述止挡部和所述第二悬挂部;
则步骤S1具体包括:
SD11,将所述第一卡合件、所述弹性元件、所述下部构件、所述第二卡合件和所述连接本体组装形成第一分组件。
SD12,形成所述第一组件:将所述第一分组件中的所述第一卡合件与所述丝杆固定连接,将所述第一分组件中的所述第二卡合件与所述阀针固定连接。
如上所述的电子膨胀阀的组装方法,所述下部构件包括第一构件和第二构件,所述步骤SD11包括:将所述第二构件套设于所述连接本体的外周部,所述弹性元件套设于所述连接本体的外周部并位于所述第一卡合件与所述第二构件之间;将所述第二卡合件套设于所述第二构件的外周部;将所述第一构件与所述连接本体固定连接。
如上所述的电子膨胀阀的组装方法,其特征在于,步骤S3中,所述连接本体和所述阀针均与所述阀芯套之间间隙配合,所述阀芯套对所述活动连接部件和所述阀针部件进行导向。
附图说明
图1为本发明所提供电子膨胀阀第一实施例的剖面示意图,此时阀处于完全打开状态;
图2为图1中I 1部位的局部放大图;
图3为图1所示电子膨胀阀处于闭阀状态一时的I 1部位的局部放大图;
图4为图1所示电子膨胀阀处于闭阀状态二时的I 1部位的局部放大图;
图5为图1所示电子膨胀阀处于闭阀状态三时的I 1部位的局部放大图;
图6为图1所示电子膨胀阀中活动连接部件的剖视图;
图7为本发明所提供电子膨胀阀在第一实施例基础上的一个变形例的局部剖面示意图;
图8为本发明所提供电子膨胀阀第二实施例的剖面示意图,此时阀处于完全打开状态;
图9为图8中I 2部位的局部放大图;
图10为图8所示电子膨胀阀处于闭阀状态一时的I 2部位的局部放大图;
图11为图8所示电子膨胀阀处于闭阀状态二时的I 2部位的局部放大图;
图12为图8所示电子膨胀阀处于闭阀状态三时的I 2部位的局部放大图;
图13为图8所示电子膨胀阀的阀针结构示意图;
图14为本发明所提供电子膨胀阀第三实施例的剖面示意图,此时阀处于完全打开状态;
图15为图14中I 3部位的局部放大图;
图16为图14所示电子膨胀阀处于闭阀状态一时的I 3部位的局部放大图;
图17为图14所示电子膨胀阀处于闭阀状态二时的I 3部位的局部放大图;
图18为图14所示电子膨胀阀处于闭阀状态三时的I 3部位的局部放大图;
图19为本发明所提供电子膨胀阀第四实施例的剖面示意图,此时阀处于完全打开状态;
图20为图19中I 4部位的局部放大图;
图21为图19所示电子膨胀阀处于闭阀状态一时的I 4部位的局部放大图;
图22为图19所示电子膨胀阀处于闭阀状态二时的I 4部位的局部放大图;
图23为图19所示电子膨胀阀处于闭阀状态三时的I 4部位的局部放大 图;
图24示出了本发明电子膨胀阀的动作特性示意图,其中t在各实施例中分别代表t 1、t 2、t 3、t 4
具体实施方式
需要先说明的是,本文中所使用的方位词、“上”和“下”等,均是以本文说明书附图中图示位置为基准定义的,本文中所涉及的“轴向”指电子膨胀阀的轴线方向,具体地,如沿电子膨胀阀的阀芯套的轴线方向,即本文中说明书附图所在的纸面的“自上而下”或“自下而上”的垂直方向。本文中所涉及的“径向”指与前述电子膨胀阀的轴线方向垂直的方向。“弹性元件产生将阀针部件向阀口部推压的弹性力”,是指,弹性元件产生使阀针部件将阀口部进一步压紧的力。“阀针部件能够远离或接近阀口部”是指阀针部件能够相对于阀口部轴向移动,其中,包括阀针部件关闭阀口部的情况。本文中各方位词的使用只是为了描述技术方案的清楚及方便,不应当对保护范围构成限制。
还需要说明的是,本文中的“悬挂地支撑”,是指两部件之间一者支撑着另一者但二者之间不固定连接,并且,在电子膨胀阀处于某些状态下,一者与另一者可看作整体地同步移动,而在电子膨胀阀处于某些状态下,二者之间又可以在轴向和/或径向发生相对位移。
还需要说明的是,本文中的“关闭”是指电子膨胀阀处于下文中图3、图10、图16或图21中的闭阀状态一的状态,也即,阀针部件从开阀状态趋于闭阀方向移动至使阀针部件刚关闭阀口部时的状态。
还需要说明的是,本文中所述的“固定连接”包括直接固定连接,也包括通过其它零件间接固定连接,同理,下文中所述的“驱动”包括直接驱动,也包括通过其它部件对动作进行传递的间接驱动。
还需要说明的是,本文中所述的丝杆部件的轴向位移量与预设位移量的大小的比较都是以图3或图10或图16或图21所示的闭阀状态一,即自电子膨胀阀处于刚关闭状态开始为基准来讨论的。
为了使本技术领域技术人员更好地理解本发明方案,下面结合附图和 具体实施例对本发明作进一步的说明,尤其主要就本发明的核心发明点作出详细说明。
实施例一:
请参考图1至图6及图24,图1为本发明所提供电子膨胀阀第一实施例的剖面示意图,图2为图1中I 1部位的局部放大图,图3为图1所示电子膨胀阀处于闭阀状态一时的I 1部位的局部放大图,图4为图1所示电子膨胀阀处于闭阀状态二时的I 1部位的局部放大图,图5为图1所示电子膨胀阀处于闭阀状态三时的I 1部位的局部放大图,图6为图1所示电子膨胀阀中活动连接部件的剖视图,图24示出了本发明电子膨胀阀的动作特性示意图。
其中,在本实施例下文中,定义图2所示的阀完全打开状态为“开阀状态”,此时,丝杆部件4A与活动连接部件6A在轴向具有可相对移动的距离,标记为t 1,即本实施例中所述的预设位移量;定义阀针部件5A关闭阀口部21A时的状态为“闭阀状态一”,如图3所示,此时,丝杆部件4A与活动连接部件6A在仍轴向具有可相对移动的距离t 1;定义自图3所示的“闭阀状态一”开始至丝杆部件4A趋于闭阀方向移动的轴向位移量小于等于预设位移量t 1期间为“闭阀状态二”,图4所示为丝杆自闭阀状态一开始移动的轴向位移量=t 1时的结构示意图;定义丝杆部件4A自“闭阀状态一”开始趋于闭阀方向移动的轴向位移量大于预设位移量t 1时为“闭阀状态三”,如图5所示。
如图1和图2所示,该电子膨胀阀包括具有阀腔11A的阀体部件1A、阀芯套2A、转子部件3A、丝杆部件4A、阀针部件5A和螺母部件8A。具体地,阀体部件1A包括上阀体12A和下阀体13A,下阀体13A上连接有第一接管,上阀体12A和下阀体13A固定连接形成阀腔11A。转子部件3A、丝杆部件4A和阀针部件5A设置于阀腔11A中。阀芯套2A开设有阀口部21A并与下阀体13A焊接固定。阀芯套2A的下端部从阀腔11A中伸出并连接有第二接管。也即,本实施例中,阀芯套2A部分地设置于阀腔11A中。阀针部件5A设置于阀芯套2A中并可与阀口部21A相接触或分离。转子部件3A包括转子31A以及与转子31A固定连接的连接座32A和与连接座32A固定连接的止动杆33A。螺母部件8A包括与下阀体13A 通过连接片84A固定连接的具有内螺纹孔的螺母81A,固定在螺母81A的外周部的弹簧导轨82A,还包括滑环83A,滑环83A可在弹簧导轨82A上沿轴向滑移。螺母部件8A还包括上止动部和下止动部。
其中,设置于阀腔11A中的丝杆部件4A与转子部件3A的上端部固定连接,丝杆部件4A的外螺纹与固定在阀体部件1A上的螺母部件8A的内螺纹孔配合,
丝杆部件4A包括第一支撑部。活动连接部件6A由丝杆部件4A悬挂地支撑,具体地,活动连接部件6A包括第二支撑部和能够由第一支撑部支撑的第一悬挂部。阀针部件5A由活动连接部件6A悬挂地支撑,具体地,阀针部件5A包括由活动连接部件6A的第二支撑部支撑的第二悬挂部。弹性元件7A设置于活动连接部件6A的外部,其一端与活动连接部件6A抵接,另一端与阀针部件5A抵接。当转子部件3A驱动丝杆部件4A沿阀体部件1A的轴向往复移动时,阀针部件5A在活动连接部件6A的作用下响应丝杆部件4A的动作从而远离或接近阀口部21A以调节电子膨胀阀的开度。
具体来说,当丝杆部件4A移动至第一支撑部悬挂地支撑第一悬挂部,第二支撑部悬挂地支撑第二悬挂部时,丝杆部件4A能够带动活动连接部件6A沿轴向移动,活动连接部件6A能够带动阀针部件5A沿轴向移动。
当阀针部件5A关闭阀口部21A开始至丝杆部件4A趋于闭阀方向移动预设位移量t 1期间,即从图3所示状态移动至图4所示状态过程中,弹性元件7A不产生将阀针部件5A向阀口部21A推压的弹性力;当阀针部件5A关闭阀口部21A开始至丝杆部件4A趋于闭阀方向移动预设位移量t 1以上时,弹性元件7A产生将阀针部件5A向阀口部21A推压的弹性力。
本方案中,活动连接部件6A具有第一连接腔61A,丝杆部件4A具有伸入第一连接腔61A的丝杆部件连接部,丝杆部件连接部形成有第一支撑部。活动连接部件6A具有朝向第一连接腔61A的与第一支撑部配合的第一悬挂部,当丝杆部件4A趋于开阀方向移动使第一支撑部与第一悬挂部抵接时,丝杆部件4A悬挂地支撑活动连接部件6A并能够带动活动连接部件6A沿轴向移动。阀针部件5A具有伸入第一连接腔61A的阀针部件连接部,阀针部件连接部包括第二悬挂部,活动连接部件6A具有朝向第一 连接腔61A的第二支撑部,当丝杆部件4A趋于开阀方向移动使第二悬挂部与第二支撑部抵接时,活动连接部件6A能够悬挂地支撑阀针部件5A并能够带动阀针部件5A沿轴向移动。
活动连接部件6A还具有设置于第一支撑部下方的止挡部,当丝杆部件4A趋于闭阀方向移动至第一支撑部与止挡部抵接后,丝杆部件4A能够带动活动连接部件6A趋于闭阀方向移动,以使弹性元件7A产生将阀针部件5A向阀口部21A推压的弹性力。
通过上述结构设计,当丝杆部件4A自图2所示的开阀状态趋于闭阀方向移动至阀针部件关闭阀口部21A,即图3所示的闭阀状态一的过程中,活动连接部件6A和阀针部件5A也在自身重力作用下发生同步位移,也就是说,在此过程中,丝杆部件4A、活动连接部件6A、弹性元件7A和阀针部件5A四者之间不发生相对位移,可看作一个整体在移动。紧接着,闭阀状态二过程中,即图3所示状态移动至图4所示状态过程中,丝杆部件4A下移,即丝杆部件4A相对于活动连接部件6A在预设位移量t 1范围内沿轴向趋于闭阀方向移动。丝杆部件4A下移过程中,活动连接部件6A的位置受弹性元件7A的弹性力作用保持不动,弹性元件7A不产生将阀针部件5A向阀口部21A方向推压的弹性力。当丝杆部件4A在图4所示状态继续趋于闭阀方向移动至图5所示的状态过程中,即闭阀状态三过程中,丝杆部件4A推压着活动连接部件6A且活动连接部件6A推压弹性元件7A一起向趋于闭阀方向移动,该过程中,弹性元件7A受压变形产生将阀针部件5A向阀口部21A推压的弹性力。
本实施例中,阀针部件5A整体设置于阀芯套2A内,为了在上述移动过程更好地保证阀针部件5A的同轴度,当阀针部件5A沿轴向往复移动时,阀芯套2A的内壁作为导向部可对其进行导向。作为一种具体实施例,活动连接部件6A也大致设置于阀芯套2A内,活动连接部件6A沿轴向往复移动时,阀芯套2A的内壁也可作为导向部对其进行导向。前述的“大致”是指本实施例中,活动连接部件6A的上端有少部分伸出了阀芯套2A,即,活动连接部件6A部分地设置于阀芯套2A中。因此,为避免歧义,使用“大致”一词进行说明。本领域技术人员可以理解的是,本实施例中的活动连接部件6A完全设置于阀芯套2A内,即不露出阀芯套2A也是可以的。可 以理解是的,阀针部件5A的下端部也可以伸出阀芯套2A,只要能实现本发明目的即可。本实施例中,以上述活动连接部件6A大致设置于阀芯套2A内为例进行说明。
为了更好地理解本方案,下面对本方案中丝杆部件4A、阀针部件5A和活动连接部件6A等各部件的具体结构设计进行详细介绍。
如图2和图6所示,活动连接部件6A包括大致筒状的连接本体62A,连接本体62A的上端部具有上开口部,连接本体62A的下端部具有下开口部,上开口部与下开口部连通。活动连接部件6A还包括分别固定在上开口部和下开口部的上部构件63A和下部构件64A。弹性元件7A的一端抵接下部构件64A。上部构件63A形成有第一悬挂部,下部构件64A形成有第二支撑部,弹性元件7A具体与第二支撑部抵接。连接本体62A、上部构件63A和下部构件64A大致围成本实施例中的第一连接腔61A。
其中,连接本体62A具有位于上部构件63A下方的止挡部。具体地,如图6所示,连接本体62A具体设计为包括筒部621A和第一环形凸台622A的带中通孔的“H”形结构。其中,筒部621A指连接本体62A的自上端面部至下端面部的圆筒部分,第一环形凸台622A为与筒部621A一体且沿筒部621A的内壁沿径向向第一连接腔61A延伸形成的环形凸台,该第一环形凸台622A形成本实施例中的止挡部,具体由其上端面部与丝杆部件4A的第二悬挂部抵接。
上部构件63A具体为具有轴向通孔的第一环状件,其套设在丝杆部件4A的外周并通过焊接方式固定在连接本体62A的上开口部。第一环状件形成有朝向第一连接腔61A的下端面部的第一悬挂部,第一悬挂部与连接本体62A的第一环形凸台622A的上端面部在轴向具有一定距离,这样,上部构件63A、连接本体62A的筒部621A和连接本体62A的第一环形凸台622A(止挡部)三者共同形成一位于第一连接腔61A内的容纳空间611A。
下部构件64A通过焊接方式固定在连接本体62A的下开口部,下部构件64A上形成有第二支撑部。下部构件64A在本实施例中具体为具有轴向通孔的基件,该基件套设在阀针部件5A的外周部,更具体地设计,基件为与连接本体62A形状相似的带轴向通孔的“H”型结构,其部分内壁沿 径向延伸形成具有上端面部6411A和下端面部6412A的第二环形凸台641A,第二环形凸台641A作为本实施例中的第二支撑部,其上端面部6411A用于与下文的第二卡合件抵接。下端面部6412A与连接本体62A的筒部621A的侧壁之间形成一容纳凹槽,容纳凹槽中设置有一垫圈53A。弹性元件7A的上端与该垫圈53A的下端面部直接相抵,垫圈53A的作用是减少弹性元件7A与基件之间的摩擦力,从而降低阀针51A(见下文)与丝杆部件4A之间的摩擦力,防止阀针51A随丝杆部件4A进行旋转,以减少阀口部21A部位的磨损。
如图3和图4所示,丝杆部件4A包括丝杆41A和套设并固定在丝杆41A下端部的第一卡合件42A,第一卡合件42A形成有第一支撑部。本实施例的丝杆部件连接部包括该第一卡合件42A和丝杆41A的位于第一连接腔61A中的部分。具体设置时,第一卡合件42A为一个具有与丝杆41A配合的中通孔的套件,该套件包括位于上部构件63A与第一环形凸台622A之间的大径环421A,还包括自大径环421A下端面部向下延伸的直径小于大径环421A的小径环422A,该大径环421A作为本实施例中的第一支撑部。本实施例中,第一卡合件42A通过焊接方式固定在丝杆41A的下端部,该小径环422A的设置便于二者之间的焊接。可以理解的是,第一卡合件42A也可以不设置小径环422A。
丝杆部件4A的大径环421A可以在前述的容纳空间611A内沿轴向移动。则,在电子膨胀阀处于开阀状态和闭阀状态一中,上部构件63A的下端面部与丝杆部件4A的大径环421A的上端面部抵接,丝杆部件4A悬挂地支撑活动连接部件6A,此时,丝杆部件4A的大径环421A的下端面与第一环形凸台622A的上端面之间的轴向距离即为本实施例中所述的预设位移量t 1,该预设位移量t 1的大小可根据实际需要来设定。
如上,本实施例中,第一卡合件42A与丝杆41A为两个独立的部件,二者之间焊接固定,当然,需要说明的是,在不影响组装的前提下,两者也可设为一体结构,如图7所示,图7为本发明所提供电子膨胀阀在第一实施例基础上的一个变形例的局部剖面示意图。该变形例中,丝杆部件4A’为一体加工形成的一体式结构,包括丝杆41A’,丝杆41A’的下端部沿径向延伸形成一环形凸台42A’作为第二支撑部。相当于将图1中所示的丝杆 部件的丝杆和第一卡合件由一个零件一次性一体加工而成,省去了丝杆与第一卡合件的装配工序。
如图1和图5所示,阀针部件5A包括阀针51A,阀针51A又具体包括主体部511A、设置于主体部511A下方与可与阀口部21A接触或分离的流量调节部512A和设置于主体部511A上方的杆部513A。其中,阀针51A沿轴向往复移动时主体部511A可由阀芯套2A的内壁作为导向部对其进行导向,主体部511A与杆部513A共同形成第一台阶部514A。弹性元件7A套设在杆部513A的外周,弹性元件7A的一端与垫圈53A直接抵接,与活动连接部件6A的下部构件64A(基件)间接抵接,弹性元件7A的另一端抵接在第一台阶部514A上。此处,可以理解的是,前述的垫圈53A也可设置在第一台阶部514A的台阶面上,则弹性元件7A的下端与垫圈53A直接抵接,与第一台阶部514A间接抵接。或者,在弹性元件7A与下部构件64A之间,弹性元件7A与第一台阶部514A之间均设置垫圈53A也是可以的,垫圈53A的作用与前述作用相同,在此不再重复叙述。
阀针部件5A还包括设置于第一连接腔61A内的套设在阀针51A的杆部513A外周部的第二卡合件52A。第二卡合件52A形成有第二悬挂部。本实施例中的阀针部件连接部包括第二卡合件52A和图2状态下杆部513A伸入第一连接腔61A的部分。具体地,第二卡合件52A为C形插片,功能类似于在杆部513A的周部形成了带缺口的径向凸环,其与第二支撑部抵接以使活动连接部件6A能够悬挂地支撑阀针部件5A。
如上,第二卡合件52A与阀针51A为两个独立的部件,当然,在不影响组装的前提下,两者也可设为一体结构。
这里需要指出的是,第二卡合件52A与阀针51A为两个独立部件时,第二卡合件52A可以与阀针51A固接,也可以与阀针51A活动连接。当活动连接时,第二卡合件52A仅外套在杆部513A的外周即可,可相对杆部512A轴向移动,如本实施例中所示。
实际设置时,第一卡合件42A和第二卡合件52A也可不设置成上述结构,两者的设置只要能够与相应的结构配合,以实现上述连接要求即可。
另外,具体设置时,第二卡合件52A与下部构件64A之间具有预设的径向位移量,也就是说,第二卡合件52A可以相对下部构件64A在径向上 有一定的位移活动空间,这样,阀针部件5A能够自动调准中心,以便使阀针部件5A的流量调节部512A能够易于与阀口部21A配合。
类似地,实际设置时,丝杆41A和第一卡合件42A相对连接本体62A也可设有预设的径向位移量,使丝杆41A和第一卡合件42A也能够自适应调准中心。
上面对本实施例中的丝杆部件4A、阀针部件5A和活动连接部件6A的具体结构进行了详细介绍,下面对本实施例电子膨胀阀从图2所示的开阀状态至图5所示的阀紧闭状态的动作进行详细说明。请结合图1至图6及图24,其中,图24示出了本发明的电子膨胀阀的动作特性示意图,包括电机的脉冲数与阀针位移的关系,电机的脉冲数与弹簧作用力的关系及电机的脉冲数与阀流量的关系。
图2所示的开阀状态至图3所示的闭阀状态一移动过程如下:
如图1和图2所示,电子膨胀阀处于阀针部件5A与阀口部21A分离的开阀状态。在此开阀状态下,丝杆部件4A的第一卡合件42A的大径环421A与活动连接部件6A的上部构件63A的下端面部抵接,从而丝杆部件4A悬挂地支撑活动连接部件6A。大径环421A的下端面部与连接本体62A的第一环形凸台622A(即,止挡部)之间存在轴向预设位移量t 1。阀针部件5A的第二卡合件52A的下端面部与下部构件64A的第二环形凸台641A的上端面部6411A抵接,从而由活动连接部件6A悬挂地支撑阀针部件5A。
从该开阀状态开始,通过电子膨胀阀的转子部件3A驱动丝杆部件4A趋于闭阀方向移动直至阀针51A的流量调节部512A与阀口部21A接触将阀口部21A关闭,即到达图3所示的闭阀状态一的过程中,丝杆部件4A、活动连接部件6A、弹性元件7A和阀针部件5A可看做一个整体一起沿轴向趋于闭阀方向移动,丝杆部件4A、活动连接部件6A、阀针部件5A和弹性元件7A四者的相对位置关系与图2所示的开阀状态时一致,第一卡合件42A的大径环421A的下端面部与活动连接部件6A的止挡部之间仍然存在轴向预设位移量t 1,弹性元件7A不会被压缩,不产生将阀针部件5A向阀口部21A推压的弹性力,阀针部件5A靠自身重力作用关闭阀口部21A,阀针部件5A与阀口部21A之间不受弹性元件7A的弹性力影响,即便阀针51A旋转,阀口部21A也只受到阀针部件5A与活动连接部件6A 的自重部分造成的摩擦力,这对阀针51A与阀口部21A的接触面的磨损很小。
图3所示的闭阀状态一至图4所示的闭阀状态二的动作过程如下:
从图3所示的阀针51A关闭阀口部21A的闭阀状态一开始,通过转子部件3A进一步驱动丝杆部件4A沿轴向趋于闭阀方向移动,由于第一卡合件42A的大径环421A与第一环形凸台622A之间的预设位移量t 1的存在,活动连接部件6A、阀针部件5A及阀口部21A三者的位置关系不发生变化。即,阀针部件5A与活动连接部件6A不沿轴向下移,只有丝杆部件4A沿轴向下移趋于闭阀方向移动,即,丝杆部件4A相对活动连接部件6A和阀针部件5A发生轴向相对位移。当丝杆部件4A下移至第一卡合件42A的大径环421A与连接本体62A的第一环形凸台622A相抵接为闭阀状态二的终点。也就是说,丝杆部件4A自闭阀状态一趋于闭阀方向移动的位移量小于或等于预设位移量t 1的过程,为闭阀状态二。图4所示为丝杆部件4A的位移量等于预设位移量t 1时的状态图,此为第一卡合件42A的大径环421A与活动连接部件6A的第一环形凸台622A刚接触但未对其施力的瞬间。
该过程中,弹性元件7A不产生将阀针部件5A向阀口部21A推压的弹性力。即,阀针51A和阀口部21A的接触面之间不受弹性元件7A的弹性力影响。可见,在整个闭阀状态二过程中,即便阀针51A旋转,阀口部21A也只受到阀针部件5A与活动连接部件6A的自重部分造成的摩擦力,这对阀针51A与阀口部21A的接触面的磨损很小。
从图4所示的闭阀状态二至图5所示的闭阀状态三的动作过程如下:
从图4所示的闭阀状态二开始,通过转子部件3A再进一步驱动丝杆部件4A沿轴向趋于闭阀方向移动,由于丝杆部件4A的第一卡合件42A的大径环421抵接着连接本体62A的第一环形凸台622A,所以在丝杆部件4A下移的过程中,活动连接部件6A受丝杆部件4A压抵也一起下移,从而使弹性元件7A压缩变形产生将阀针51A向阀口部21A推压的弹性力,该弹性力使阀针51A更可靠地密封阀口部21A,将阀口部21A紧闭,保证阀的断流性。
该过程中,由于弹性元件7A被压缩,若阀针51A与丝杆部件4A之 间的摩擦力大于阀针51A与阀口部21A之间的摩擦力,则阀针51A随丝杆部件4A一起相对于阀口部21A发生旋转,阀口部21A的与阀针51A接触的部位受到磨损。若阀针51A与丝杆部件4A之间的摩擦力小于阀针51A与阀口部21A之间的摩擦力,则阀针51A不随丝杆部件4A发生旋转,即阀口部21A的与阀针51A接触的部位无明显磨损。因此,为了减小阀针51A与丝杆部件4A之间的摩擦力,设置了前文所述的垫图53A。
该过程中,由于第二卡合件52A活动套设于阀针51A的杆部513A的外周,本过程中,第二卡合件52A受自身重力作用相对阀针51A下移,第二卡合件52A与活动连接部件6A的下部构件64A接触,相当于由活动连接部件6A的第二支撑部支撑第二卡合件52A,但活动连接部件6A与阀针51A之间相对分离。此时为闭阀状态三,如图5所示。若实际设置时,第二卡合件52A也可以与阀针51A固接,那么,第二卡合件52A相当于与阀针51A为一体结构。在闭阀状态三过程中,第二卡合件52A与活动连接部件6A的第二支撑部分离。
上述为该电子膨胀阀的闭阀过程,在开阀过程中,阀针51A与阀口部21A分离时也相同,在两者分离的瞬间,阀针51A与阀口部21A之间的摩擦力仅为阀针部件5A与活动连接部件6A的自重造成,即便反复动作,阀针51A与阀口部21A接触部位的磨损量也极少。
综上可知,本实施例的电子膨胀阀,在阀针51A将阀口部21A关闭的瞬间和阀针51A与阀口部21A分离的瞬间,以及闭阀状态二过程中,阀针51A与阀口部21A之间的摩擦力仅是由阀针部件5A和活动连接部件6A的自重部分造成的力,这样,即使电子膨胀阀反复动作过程中,阀针51A与阀口部21A的接触部位之间的磨损也极小,从而减少了电子膨胀阀闭阀状态时的内泄漏。
下面以图1所示那样第一卡合件42A与丝杆41A为分体式时的结构来说明本实施例的电子膨胀阀组装方法:
包括如下步骤:
S01,加工本实施例电子膨胀阀所需的各个零件或零部件。如加工前述图1至图6中所示结构的阀针51A,第二卡合件52A,垫圈53A,弹性元件7A,连接本体62A,上部构件63A、下部构件64A,丝杆41A,第一卡 合件42A,螺母部件8A,转子部件3A,上阀体12A,下阀体13A,阀芯套2A,第二接管和第一接管等。其中,加工的阀针51A包括主体部511A,流量调节部512A和杆部513A,主体部511A与杆部513A共同形成第一台阶部514A。
S1,将弹性元件7A、丝杆部件4A、活动连接部件6A和阀针部件5A组装形成第一组件,并,第一组件中,弹性元件7A的一端抵接于活动连接部件6A,另一端抵接于阀针51A的第一台阶部514A;
步骤S1又具体包括以下步骤:
SA11,将弹性元件7A的下端抵接在阀针51A的第一台阶部514A上、将垫圈53A和下部构件64A套设在阀针51A的外周部并位于弹性元件7A的上方,这样,弹性元件7A的上端与垫圈53A直接抵接,与下部构件64A间接抵接,之后,将第二卡合件52A卡在阀针51A的外周部并位于下部构件64A和阀针51A的上端部之间。也就是说,此步骤中,阀针51A、弹性元件7A、垫圈53A、下部构件64A和第二卡合件52A装配后形成了第一分组件。本步骤中,各零件之间的装配顺序不作限定,只要能实现第一分组件的装配即可。
SA12,将第一卡合件42A套设并焊接固定在丝杆41A的下端部,之后将上部构件63A套设至丝杆41A的外周部,形成第二分组件。此步骤中,也可以先将上部构件63A套设在丝杆41A的外周部后,再将第一卡合件41A套设在丝杆41A的下端部并与之焊接固定。
SA13,将上部构件63A和下部构件64A分别焊接固定在连接本体62A的上开口部和下开口部后形成第一组件。也就是说,此步骤中,第一分组件和第二分组件分别固定在连接本体64A上以后完成了第一组件的装配。
S2,将下阀体13A与阀芯套2A及第一接管和第二接管通过炉焊焊接固定形成第二组件。当然,可以理解的是,此步骤中,也可以采用其它焊接方式将各零件进行连接。本实施例中,阀芯套2A置于下阀体13A中且其下端部从下阀体13A中伸出,第二接管焊接在阀芯套2A的下端部的外周,第一接管焊接在下阀体13A的侧壁。
S3,将第一组件的阀针51A的下端伸入阀芯套2A,使阀针51A与阀芯套2A间隙配合,连接本体62A也与阀芯套2A间隙配合,这样,当阀 针51A、连接本体62A轴向移动时,阀芯套2A的内壁能够作为导向部对二者进行导向。将螺母部件8A套设在丝杆41A的外周并与螺母部件8A螺纹连接;将螺母部件8A与下阀体13A焊接固定;
S4,将丝杆41A的上端部与所述转子部件3A焊接固定;
S5,将上阀体12A与下阀体13A焊接固定,完成本实施例电子膨胀阀的装配。
图7所示电子膨胀阀的组装与实施例一的不同之处在于,其没有实施例一中的将第一卡合件套设并焊接固定在丝杆的下端部的组装步骤,其它与实施例一相同,不再重复叙述。
实施例二:
图8为本发明所提供电子膨胀阀第二实施例的剖面示意图,图9为图8中I 2部位的局部放大图,图10为图8所示电子膨胀阀处于闭阀状态一时的I 2部位的局部放大图,图11为图8所示电子膨胀阀处于闭阀状态二时的I 2部位的局部放大图,图12为图8所示电子膨胀阀处于闭阀状态三时的I 2部位的局部放大图,图13为图8所示电子膨胀阀的阀针结构示意图。
其中,在本实施例下文中,定义图9所示的阀完全打开状态为“开阀状态”,此时,丝杆部件4B与活动连接部件6B在轴向具有可相对移动的距离,标记为t 2,即本实施例中所述的预设位移量;定义阀针部件5B关闭阀口部21B时的状态为“闭阀状态一”,如图10所示,此时,丝杆部件4B与活动连接部件6B在仍轴向具有可相对移动的距离t 2;定义自图10所示的“闭阀状态一”开始至丝杆部件4B趋于闭阀方向移动的轴向位移量小于等于预设位移量t 2期间为“闭阀状态二”,图11所示为丝杆自闭阀状态一开始移动的轴向位移量=t 2时的结构示意图;定义丝杆部件4B自“闭阀状态一”开始趋于闭阀方向移动的轴向位移量大于预设位移量t 2时为“闭阀状态三”,如图12所示。
如图8和图9所示,该电子膨胀阀包括具有阀腔11B的阀体部件1B、阀芯套2B、转子部件3B、丝杆部件4B和阀针部件5B、螺母部件8B。具体地,阀体部件1B包括上阀体12B和下阀体13B,下阀体13B上连接有第一接管,上阀体12B和下阀体13B固定连接形成阀腔11B。转子部件3B、丝杆部件4B和阀针部件5B设置于阀腔11B中。阀芯套2B开设有阀口部 21B并与下阀体13B焊接固定。阀芯套2B的下端部从阀腔11B中伸出并连接有第二接管。也即,本实施例中,阀芯套2B部分地设置于阀腔11B中。阀针部件5B设置于阀芯套2B中并可与阀口部21B相接触或分离。转子部件3B包括转子31B以及与转子31B固定连接的连接座32B和与连接座32B固定连接的止动杆33B。螺母部件8B包括与下阀体13B通过连接片84B固定连接的具有内螺纹孔的螺母81B,固定在螺母81B的外周部的弹簧导轨82B,还包括滑环83B,滑环83B可在弹簧导轨82B上沿轴向滑移。螺母部件8B还包括上止动部和下止动部。
其中,设置于阀腔11B中的丝杆部件4B与转子部件3B的上端部固定连接,丝杆部件4B的外螺纹与固定在阀体部件1B上的螺母部件8B的内螺纹孔配合,
丝杆部件4B包括第一支撑部。活动连接部件6B由丝杆部件4B悬挂地支撑,具体地,活动连接部件6B包括第二支撑部和能够由第一支撑部支撑的第一悬挂部。阀针部件5B由活动连接部件6B悬挂地支撑,具体地,阀针部件5B包括由活动连接部件6B的第二支撑部支撑的第二悬挂部。弹性元件7B设置于活动连接部件6B的外部,其一端与活动连接部件6B抵接,另一端与阀针部件5B抵接。当转子部件3B驱动丝杆部件4B沿阀体部件1B的轴向往复移动时,阀针部件5B在活动连接部件6B的作用下响应丝杆部件4B的动作从而远离或接近阀口部21B以调节电子膨胀阀的开度。
具体来说,当丝杆部件4B移动至第一支撑部悬挂地支撑第一悬挂部,第二支撑部悬挂地支撑第二悬挂部时,丝杆部件4B能够带动活动连接部件6B沿轴向移动,活动连接部件6B能够带动阀针部件5B沿轴向移动。
当阀针部件5B关闭阀口部21B开始至丝杆部件4B趋于闭阀方向移动预设位移量t 2期间,即从图3所示状态移动至图4所示状态过程中,弹性元件7B不产生将阀针部件5B向阀口部21B推压的弹性力;当阀针部件5B关闭阀口部21B开始至丝杆部件4B趋于闭阀方向移动预设位移量t 2以上时,弹性元件7B产生将阀针部件5B向阀口部21B推压的弹性力。
本方案中,活动连接部件6B具有第一连接腔61B,丝杆部件4B具有伸入第一连接腔61B的丝杆部件连接部,丝杆部件连接部形成有第一支撑 部。活动连接部件6B具有朝向第一连接腔61B的与第一支撑部配合的第一悬挂部,当丝杆部件4B趋于开阀方向移动使第一支撑部与第一悬挂部抵接时,丝杆部件4B悬挂地支撑活动连接部件6B并能够带动活动连接部件6B沿轴向移动。阀针部件5B具有伸入第一连接腔61B的阀针部件连接部,阀针部件连接部包括第二悬挂部,活动连接部件6B具有朝向第一连接腔61B的第二支撑部,当丝杆部件4B趋于开阀方向移动使第二悬挂部与第二支撑部抵接时,活动连接部件6B能够悬挂地支撑阀针部件5B并能够带动阀针部件5B沿轴向移动。
活动连接部件6B还具有设置于第一支撑部下方的止挡部,当丝杆部件4B趋于闭阀方向移动至第一支撑部与止挡部抵接后,丝杆部件4B能够带动活动连接部件6B趋于闭阀方向移动,以使弹性元件7B产生将阀针部件5B向阀口部21B推压的弹性力。
通过上述结构设计,当丝杆部件4B自图9所示的开阀状态趋于闭阀方向移动至阀针部件关闭阀口部21B,即图10所示的闭阀状态一的过程中,活动连接部件6B和阀针部件5B也在自身重力作用下发生同步位移,也就是说,在此过程中,丝杆部件4B、活动连接部件6B、弹性元件7B和阀针部件5B四者之间不发生相对位移,可看作一个整体在移动。紧接着,闭阀状态二过程中,即图10所示状态移动至图11所示状态过程中,丝杆部件4B下移,即丝杆部件4B相对于活动连接部件6B在预设位移量t 2范围内沿轴向趋于闭阀方向移动。丝杆部件4B下移过程中,活动连接部件6B的位置受弹性元件7B的弹性力作用保持不动,弹性元件7B不产生将阀针部件5B向阀口部21B方向推压的弹性力。当丝杆部件4B在图11所示状态继续趋于闭阀方向移动至图12所示的状态过程中,即闭阀状态三过程中,丝杆部件4B推压着活动连接部件6B且活动连接部件6B推压弹性元件7B一起向趋于闭阀方向移动,该过程中,弹性元件7B受压变形产生将阀针部件5B向阀口部21B推压的弹性力。
本实施例中,阀针部件5B整体设置于阀芯套2B内,为了在上述移动过程更好地保证阀针部件5B的同轴度,当阀针部件5B沿轴向往复移动时,阀芯套2B的内壁作为导向部可对其进行导向。作为一种具体实施例,活动连接部件6B也大致设置于阀芯套2B内,活动连接部件6B沿轴向往复 移动时,阀芯套2B的内壁也可作为导向部对其进行导向。前述的“大致”是指本实施例中,活动连接部件6B的上端有少部分伸出了阀芯套2B,即,活动连接部件6B部分地设置于阀芯套2B中。因此,为避免歧义,使用“大致”一词进行说明。本领域技术人员可以理解的是,本实施例中的活动连接部件6B完全设置于阀芯套2B内,即不露出阀芯套2B也是可以的。可以理解是的,阀针部件5B的下端部也可以伸出阀芯套2B,只要能实现本发明目的即可。本实施例中,以上述活动连接部件6B大致设置于阀芯套2B内为例进行说明。
为了更好地理解本方案,下面对本方案中丝杆部件4B、阀针部件5B和活动连接部件6B等各部件的具体结构设计进行详细介绍。
如图9和图10所示,活动连接部件6B包括具有上开口部的连接本体62B、固定在连接本体62B的上开口部的上部构件63B和固定在连接本体62B下端部的下部构件64B。上部构件63B和连接本体62B固定后形成第一连接腔61B。上部构件63B形成有第一悬挂部,下部构件64B形成有第二支撑部。弹性元件7B设置于连接本体62B的外周部,且其一端与连接本体62B抵接。此外,连接本体62B还具有位于上部构件63B下方的止挡部。
具体地,如图10所示,连接本体62B具体设计为包括大径段621B和自大径段621B的下端面部沿轴向向阀口部21B方向延伸的小径段622B。其中,大径段621B具有台阶面向上且与上开口部连通的阶梯孔,阶梯孔的孔壁形成有第一台阶部6211B。第一台阶部6211B与上部构件64B的下端面部相对设置,第一台阶部6211B形成本实施例中的止挡部。具体地,第一台阶部6211B的台阶面可与第一支撑部抵接或分离。大径段621B与小径段622B共同形成台阶面朝下的第二台阶部6212B,弹性元件7B的一端与第二台阶部6212B抵接。
上部构件63B具体为具有轴向通孔的第一环状件,其套设在丝杆部件4B的外周并通过焊接方式固定在连接本体62B的上开口部。第一环状件形成有朝向第一连接腔61B的下端面部的第一悬挂部,其下端面部与连接本体62B的第一台阶部6211B的台阶面在轴向具有一定距离,这样,上部构件63B和第一台阶部621B之间形成一位于第一连接腔61B内的容纳空 间611B。
下部构件64B具体包括具有通孔的第二环状件,其套设在连接本体62B的小径段622B的下端部并通过焊接方式与之固定连接,第二环状件形成有本实施例的第二卡合件抵接的第二支撑部。
如图11所示,丝杆部件4B包括丝杆41B和套设并固定在丝杆41B下端部的第一卡合件42B,第一卡合件42B形成有第一支撑部。本实施例的丝杆部件连接部包括该第一卡合件42B和丝杆41B的位于第一连接腔61B中的部分。具体设置时,第一卡合件42B为一个具有与丝杆41B配合的中通孔的套件,该套件包括位于上部构件63B与第一台阶部6211B之间的大径环421B,还包括自大径环421B沿轴向向下延伸的直径小于大径环421B的小径环422B,该大径环421B作为本实施例中的第一支撑部,该小径环422B的设置便于丝杆42B与第一卡合件42B二者之间的焊接。可以理解的是,第二卡合件42B也可以不设置小径环422B。
丝杆部件4B的大径环421B可以在前述容纳空间611B内沿轴向移动。则,如图9和图11所示,在电子膨胀阀处于开阀状态和闭阀状态一中,上部构件64B的下端面部与丝杆部件4B的大径环421B的上端面部抵接,丝杆部件4B悬挂地支撑活动连接部件6B,并且,大径环421B的下端面部与第一台阶部6211B的台阶面之间的轴向距离形成本实施例中所述的预设位移量t 2,该预设位移量t 2的大小可根据实际需要来设定。
如上,本实施例中,第一卡合件42B与丝杆41B为两个独立的部件,二者之间焊接固定,当然,需要说明的是,在不影响组装的前提下,两者也可设为一体结构,这可参照图7理解,在此不再重复叙述。
如图11至图13所示,阀针部件5B包括阀针51B和第二卡合件52B,阀针51B又具体包括具有开口腔5111B的主体部511B、设置于主体部511B下方与可与阀口部21B接触或分离的流量调节部512B。并且,阀针51B沿轴向往复移动时主体部511B可由阀芯套2B的内壁作为导向部对其进行导向。第二卡合件52B的上端部固定在开口腔5111B的开口部,其下端部伸入开口腔5111B中,并与阀针51B的主体部511B固定连接形成第二连接腔524B,活动连接部件6B的第二支撑部置于该第二连接腔524B中。
更具体地,第二卡合件52B具体包括套设在连接本体62B的小径段 622B的外周部并可与下部构件64B抵接的底板部521B和自底板部521B的周部边缘沿轴向向上延伸至开口腔5111B的开口部的筒部522B。筒部522B的上端部具有向外的翻边,该翻边搭接在主体部511B的上端面并与之焊接固定。底板部521B形成第二悬挂部,其下端面部与第二卡合件52B的上端面部抵接。底板部521B与筒部522B共同形成一容纳凹腔523B。弹性元件7B套设在连接本体62B的小径段622B的外周,并且,弹性元件7B的另一端置于容纳凹腔523B中与容纳凹腔523B的内底壁抵接,也即,抵接在第二卡合件52B的底板部521B的上端面部。进一步地,为了减少弹性元件7B与连接本体62B之间的摩擦力,从而降低阀针51B与丝杆部件4B之间的摩擦力,防止阀针51B随丝杆部件4B进行旋转,在弹性元件7B的上端与连接本体62B的大径段621B之间设置有一垫圈53B,即垫圈53B设置在第二台阶部6212B与弹性元件7B之间。可以理解的是,垫圈53B也可设置在弹性元件7B的下端与容纳凹腔523B的内底壁之间。或者,在弹性元件7B的上端与第二台阶部6212B之间以及弹性元件7B的下端与容纳凹腔523B的内底壁之间均设置垫圈53B也是可以的。
这里需要指出的是,第二卡合件52B可以与阀针51B固接,也可以与阀针51B活动连接。当活动连接时,第二卡合件52B仅通过其上端部的翻边搭接在主体部511B的上端面部,通过弹性元件7B的作用保持阀针51B与第二卡合件52B不发生分离。
实际设置时,第一卡合件42B和第二卡合件52B也可不设置成上述结构,两者的设置只要能够与相应的结构配合,以实现上述连接要求即可。
另外,具体设置时,第二卡合件52B与连接本体62B的小径段之间具有预设的径向位移量,也就是说,第二卡合件52B可以相对小径段622B在径向上有一定的位移活动空间,这样,阀针部件5B能够自动调准中心,以便使阀针部件5B的流量调节部512B能够很好地与阀口部21B配合。
类似地,实际设置时,丝杆41B相对于第一卡合件42B以及第一卡合件42B相对连接本体62B的大径段621B也可设有预设的径向位移量,使丝杆41B和第一卡合件42B也能够自适应调准中心。
上面对本实施例中的丝杆部件4B、阀针部件5B和活动连接部件6B的具体结构进行了详细介绍,下面结合图24对本实施例电子膨胀阀从图9 所示的开阀状态至图12所示的阀紧闭状态的动作进行详细说明。
图9所示的开阀状态至图10所示的闭阀状态一移动过程如下:
如图9和图10所示,电子膨胀阀处于阀针51B与阀口部21B分离的开阀状态。在此开阀状态下,丝杆部件4B的第一卡合件42B的大径环421B与活动连接部件6B的上部构件63B的下端面部抵接,从而丝杆部件4B悬挂地支撑活动连接部件6B。大径环421B的下端面部与活动连接部件6B的第一台阶部6211B(即,止挡部)之间存在轴向预设位移量t 2。第二卡合件52B的下端面部与下部构件64B的上端面部抵接,从而由活动连接部件6B悬挂地支撑阀针部件5B。
从该开阀状态开始,通过电子膨胀阀的转子部件3B驱动丝杆部件4B趋于闭阀方向移动直至阀针51B的流量调节部512B与阀口部21B接触将阀口部21B关闭,即到达图10所示的闭阀状态一的过程中,丝杆部件4B、活动连接部件6B、弹性元件7B和阀针部件5B可看做一个整体一起沿轴向趋于闭阀方向移动,丝杆部件4B、活动连接部件6B、阀针部件5B和阀针部件5B四者的相对位置关系与图9所示的开阀状态时一致。第一卡合件42B的大径环421B的下端面部与活动连接部件6B的第一台阶部6211之间仍然存在轴向预设位移量t 2,弹性元件7B不会被压缩,不产生将阀针部件5B向阀口部21B推压的弹性力,阀针部件5B靠自身重力作用关闭阀口部21B,阀针部件5B与阀口部21B之间不受弹性元件7B的弹性力影响,即便阀针51B旋转,阀口部21B也只受到阀针部件5B与活动连接部件6B的自重部分造成的摩擦力,这对阀针51B与阀口部21B的接触面的磨损很小。
图10所示的闭阀状态一至图11所示的闭阀状态二的动作过程如下:
从阀针51B关闭阀口部21B开始,通过转子部件3B进一步驱动丝杆部件4B沿轴向趋于闭阀方向移动,由于第一卡合件42B的大径环421B与第一台阶部6211B之间的预设位移量t 2的存在,活动连接部件6B、阀针部件5B及阀口部21B三者的位置关系不发生变化。即,阀针部件5B与活动连接部件6B不下移,只有丝杆部件4B下移趋于闭阀方向移动,即,丝杆部件4B相对活动连接部件6B和阀针部件5B发生轴向相对位移。当丝杆部件4B下移使第一卡合件42B的大径环421B的下端面部与与连接本体 62B上的第一台阶部6211B(即止挡部)相抵接为闭阀状态二的终点。也就是说,丝杆部件4B自闭阀状态一趋于闭阀方向移动的位移量小于或等于预设位移量t 2的过程,为闭阀状态二。图11所示为丝杆部件4B的位移量等于预设位移量t 2时的状态图,此为第一卡合件42B的大径环421B与活动连接部件6B的第一台阶部6211B刚接触但未对其施力的瞬间。
该过程中,弹性元件7B不产生将阀针部件5B向阀口部21B推压的弹性力。即,阀针51B和阀口部21B的接触面之间不受弹性元件7B的弹性力影响。可见,在整个闭阀状态二过程中,即便阀针51B旋转,阀口部21B也只受到阀针部件5B与活动连接部件6B的自重部分造成的摩擦力,这对阀针51B与阀口部21B的接触面的磨损很小。
从图11所示的闭阀状态二至图12所示的闭阀状态三的动作过程如下:
从图11所示的闭阀状态二开始,通过转子部件3B再进一步驱动丝杆部件4B向下趋于闭阀方向移动,此时,丝杆部件4B的第一卡合件42B的大径环421B抵接着连接本体62B的第一台阶部6211B,所以在丝杆部件4B下移的过程中,活动连接部件6B受丝杆部件4B压抵也一起下移,此过程中,下部构件64B与第二卡合件52B之间发生轴向相对移动,下部构件64B相对于第二卡合件52B下移,从而使弹性元件7B压缩变形产生将阀针51B向阀口部21B推压的弹性力,该弹性力使阀针51B更可靠地密封阀口部21B,将阀口部21B紧闭,保证阀的断流性。
该过程中,由于弹性元件7B被压缩,若阀针51B与丝杆部件4B之间的摩擦力大于阀针51B与阀口部21B之间的摩擦力,则阀针51B随丝杆部件4B一起相对于阀口部21B发生旋转,阀口部21B的与阀针51B接触的部位受到磨损。若阀针51B与丝杆部件4B之间的摩擦力小于阀针51B与阀口部21B之间的摩擦力,则阀针51B不随丝杆部件4B发生旋转,即阀口部21B的与阀针51B接触的部位无明显磨损。因此,为了减小阀针51B与丝杆部件4B之间的摩擦力,设置了前文所述的垫图53B。
上述为该电子膨胀阀的闭阀过程,在开阀过程中,阀针51B与阀口部21B分离时也相同,在两者分离的瞬间,阀针51B与阀口部21B之间的摩擦力仅为阀针部件5B与活动连接部件6B的自重造成,即便反复动作,阀针51B与阀口部21B接触面的磨损量也极少。
综上可知,本实施例的电子膨胀阀,在阀针51B将阀口部21B关闭的瞬间和阀针51B与阀口部21B分离的瞬间,以及闭阀状态二过程中,阀针51B与阀口部21B之间的摩擦力仅是由阀针部件5B和活动连接部件6B的自重部分造成的力,这样,在即使电子膨胀阀反复动作过程中,阀针51B与阀口部21B的接触面之间的磨损也极小,从而减少了电子膨胀阀闭阀状态时的内泄漏。
下面对本实施例的电子膨胀阀组装方法进行说明:
包括如下步骤:
S01,加工本实施例电子膨胀阀所需的各个零件或零部件。如加工前述图8所示结构的阀针51B,第二卡合件52B,垫圈53B,弹性元件7B,连接本体62B,上部构件63B、下部构件64B,丝杆41B,第一卡合件42B,螺母部件8B,转子部件3B,上阀体12B,下阀体13B,阀芯套2B,第二接管和第一接管等。
S1,将弹性元件7B、丝杆部件4B、活动连接部件6B和阀针部件5B组装形成第一组件,并,第一组件中,弹性元件7B的一端抵接于活动连接部件6B,另一端抵接于阀针部件5B;
步骤S1又具体包括以下步骤:
SB11,将垫圈53B套设在连接本体62B的小径段622B的外周,之后将弹性元件7B也套设在小径段622B的外周,并使弹性元件7B的一端与垫圈53B相对。第二卡合件52B和下部构件64B依次套设在小径段622B的外周部后,将下部构件64B焊接固定在小径段622B的下端部,完成第一分组件的组装。这样,使弹性元件7B的一端抵接连接本体62B的大径段621B的下端面部,另一端抵接在第二卡合件52B的容纳凹腔523B的内底壁。
SB12,将第一卡合件42B焊接固定在丝杆41B的下端部,并将上部构件63B套设至丝杆41B的外周部,形成第二分组件;
SB13,将上部构件63B焊接固定在连接本体62B的上开口部,将阀针51B与第二卡合件52B焊接固定连接,也即此步骤中,第一分组件和第二分组合分别固定在连接本体62B上以后完成了第一组件的装配。
S2,将下阀体13B、与阀芯套2B及第一接管和第二接管通过炉焊焊 接固定形成第二组件。当然,可以理解的是,此步骤中,也可以采用其它焊接方式将各零件进行连接。本实施例中,阀芯套2B置于下阀体13B中且其下端部从下阀体13B中伸出,第二接管焊接在阀芯套2B的下端部的外周,第一接管焊接在下阀体13B的侧壁。
S3,将第一组件由阀针51B的下端伸入阀芯套2B,使阀针51B和连接本体64B与阀芯套2B间隙配合,以使阀针51B、连接本体62B作轴向移动时,阀芯套2B的内壁能够作为导向部对二者进行导向。将螺母部件8B套设在丝杆41B的外周并与丝杆41B螺纹连接;将螺母部件8B与下阀体13B焊接固定;
S4,将丝杆41B的上端部与转子部件3B焊接固定;
S5,将上阀体12B与下阀体13B焊接固定。完成电子膨胀组装。
实施例三:
请参考图14为本发明所提供电子膨胀阀第三实施例开阀状态的剖面示意图,图15为图14中I 3部位的局部放大图,图16为图14所示电子膨胀阀处于闭阀状态一时的I 3部位的局部放大图,图17为图14所示电子膨胀阀处于闭阀状态二时的I 3部位的局部放大,图18为图14所示电子膨胀阀处于闭阀状态三时的I 3部位的局部放大图。
其中,在本实施例下文中,定义阀完全打开状态为“开阀状态”,此时,阀针部件5C与活动连接部件6C在轴向具有可相对移动的距离,标记为t 3,即本文中所述的“预设位移量”,如图15所示;定义阀针部件5C关闭阀口部21C时的状态为“闭阀状态一”,如图16所示,此时,阀针部件5C与活动连接部件6C在轴向具有可相对移动的距离t 3,定义自图16所示的“闭阀状态一”开始至丝杆部件4C趋于闭阀方向移动的轴向位移量小于等于预设位移量t 3期间为“闭阀状态二”,图17所示为其中轴向位移量=t 3时的结构示意图;定义丝杆部件4C自“闭阀状态一”开始趋于闭阀方向移动的轴向位移量大于预设位移量t 3时为“闭阀状态三”,如图18所示。
如图14和图15所示,该电子膨胀阀包括具有阀腔11C的阀体部件1C、阀芯套2C、转子部件3C、丝杆部件4C和阀针部件5C、螺母部件8C。具体地,阀体部件1C包括上阀体12C和下阀体13C,下阀体13C上连接有第一接管,上阀体12C和下阀体13C固定连接形成阀腔11C。转子部件3C、 丝杆部件4C和阀针部件5C设置于阀腔11C中。阀芯套2C开设有阀口部21C并与下阀体13C焊接固定。阀芯套2C的下端部从阀腔11C中伸出并连接有第二接管。也即,本实施例中,阀芯套2C部分地设置于阀腔11C中。阀针部件5C设置于阀芯套2C中并可与阀口部21C相接触或分离。转子部件3C包括转子31C以及与转子31C固定连接的连接座32C和与连接座32C固定连接的止动杆33C。螺母部件8C包括与下阀体13C通过连接片84C固定连接的具有内螺纹孔的螺母81C,固定在螺母81C的外周部的弹簧导轨82C,还包括滑环83C,滑环83C可在弹簧导轨82C上沿轴向滑移。螺母部件8C还包括上止动部和下止动部。
其中,设置于阀腔11C中的丝杆部件4C与转子部件3C的上端部固定连接,丝杆部件4C的外螺纹与固定在阀体部件1C上的螺母部件8C的内螺纹孔配合,丝杆部件4C包括第一支撑部。活动连接部件6C由丝杆部件4C悬挂地支撑,具体地,活动连接部件6C包括第二支撑部和能够由第一支撑部支撑的第一悬挂部。阀针部件5C由活动连接部件6C悬挂地支撑,具体地,阀针部件5C包括由活动连接部件6C的第二支撑部支撑的第二悬挂部。弹性元件7C设置于活动连接部件6C的外部,其一端与活动连接部件6C抵接,另一端与丝杆部件4C抵接。当转子部件3C驱动丝杆部件4C沿阀体部件1C的轴向往复移动时,阀针部件5C在活动连接部件6C的作用下响应丝杆部件4C的动作从而远离或接近阀口部21C以调节电子膨胀阀的开度。
具体来说,当丝杆部件4C移动至第一支撑部悬挂地支撑第一悬挂部,第二支撑部悬挂地支撑第二悬挂部时,丝杆部件4C能够带动活动连接部件6C沿轴向移动,活动连接部件6C能够带动阀针部件5C沿轴向移动。
当阀针部件5C关闭阀口部21C开始至丝杆部件4C趋于闭阀方向移动预设位移量t 3期间,即从图16所示状态移动至图17所示状态过程中,弹性元件7C不产生将阀针部件5C向阀口部21C推压的弹性力;当阀针部件5C关闭阀口部21C开始至丝杆部件4C趋于闭阀方向移动预设位移量t 3以上时,弹性元件7C产生将阀针部件5C向阀口部21C推压的弹性力。
具体地,该电子膨胀阀包括具有第一连接腔61C的活动连接部件6C,阀针部件5C的上端部置于第一连接腔61C中,活动连接部件6C悬挂地支 撑阀针部件5C。丝杆部件4C的下端部置于第一连接腔61C中,并可以悬挂地支撑活动连接部件6C。丝杆部件4C位于第一连接腔61C外的部分具有外螺纹,以与固定在阀体部件1C上的螺母部件8C的内螺纹孔配合。设置于阀腔11C中的转子部件3C与丝杆部件4C的上端部固定连接,则转子部件3C能够驱动丝杆部件4C沿阀芯套2C的轴向往复移动。一弹性元件7C设置在活动连接部件6C的外部,其一端抵接在活动连接部件6C上,另一端与丝杆部件4C抵接。丝杆部件4C的外螺纹与固定在阀体部件1C上的螺母部件8C的内螺纹孔配合,设置于阀腔11C中的转子部件3C能够驱动丝杆部件4C沿阀芯套2C的轴向往复移动。
当阀针部件5C关闭阀口部21C开始至丝杆部件4C趋于闭阀方向移动预设位移量期间,弹性元件7C不产生将阀针部件5C向阀口部21推压的弹性力;当阀针部件5C关闭阀口部21C开始至丝杆部件4C趋于闭阀方向移动预设位移量以上时,弹性元件7C产生将阀针部件5C向阀口部21C推压的弹性力。
本方案中,丝杆部件4C具有伸入第一连接腔61C的丝杆部件连接部,丝杆部件连接部形成有第一支撑部,活动连接部件6C具有朝向第一连接腔61C可与第一支撑部配合的第一悬挂部,当丝杆部件4C趋于开阀方向移动使第一支撑部与第一悬挂部抵接时,丝杆部件4C能够悬挂地支撑活动连接部件6C并带动活动连接部件6C趋于开阀方向移动。
阀针部件5C具有伸入第一连接腔61C的阀针部件连接部,阀针部件连接部形成有第二悬挂部,活动连接部件6C具有朝向第一连接腔61C的第二支撑部,当丝杆部件4C趋于开阀方向移动使第二悬挂部与第二支撑部抵接时,活动连接部件6C能够悬挂地支撑阀针部件5C并带动阀针部件5C趋于开阀方向移动。
当丝杆部件4C自图15所示的开阀状态趋于闭阀方向移动至图16的闭阀状态一过程中,活动连接部件6C和阀针部件5C也发生同步位移,也就是说,在此过程中,丝杆部件4C、活动连接部件6C和阀针部件5C及弹性元件7C四者之间不发生相对位移,可看作一个整体在移动。闭阀状态二过程中,即,图16所示状态移动至图17所示状态过程中,由于丝杆部件4C向下趋于闭阀方向移动,则活动连接部件6C在弹性元件7C的作 用下和丝杆部件4C同步向趋于闭阀方向移动,即,丝杆部件4C、弹性元件7C和活动连接部件6C三者可看作一个整体相对阀针部件5C向下趋于闭阀方向移动,直至丝杆部件4C的位移量等于预设位移量t 3,活动连接部件6C与阀针部件5C上的止挡部刚刚抵接。此过程中,弹性元件7C不产生将阀针部件5C向阀口部21C方向推压的弹性力。当丝杆部件4C继续趋于闭阀方向移动的过程中,即,在闭阀状态三过程中,由于活动连接部件6C与阀针部件5C上的止挡部抵接,活动连接部件6C与阀针部件5C之间不发生轴向相对移动,而随着丝杆部件4C的下移,丝杆部件4C上的第一支撑部与活动连接部件6C上的第一悬挂部不再抵接,丝杆部件4C向下推压着弹性元件7C使弹性元件7C被压缩发生弹性形变产生作用于活动连接部件6C和阀针部件5C的弹性力,即弹性元件7C产生将阀针部件5C向阀口部21C推压的弹性力。
本实施例中,阀针部件5C设置于阀芯套2C内,为了在上述移动过程更好地保证阀针部件5C的同轴度,当阀针部件5C沿轴向移动时,阀芯套2C的内壁可作为导向部对其进行导向。作为一种具体实施例,活动连接部件6C整体设置于阀芯套2C内,活动连接部件6C沿轴向移动时,阀芯套2C的内壁也可作为导向部对其进行导向。根据阀芯套2C的结构设置,活动连接部件6C也可以不设置于阀芯套2C中。
为了更好地理解本方案,下面对本方案中丝杆部件4C、活动连接部件6C和阀针部件5C等各部件的具体结构设计进行详细介绍。
如图14至16所示,活动连接部件6C包括具有上开口部和下开口部的连接本体62C和固定在下开口部的下部构件64C,连接本体62C和下部构件64C围成本实施例中的第一连接腔61C。
其中,连接本体62C具体设计为具有阶梯通孔的筒状结构,其包括套设在丝杆部件4C上的小径筒部621C、自小径筒部621C向外翻边并向下弯折的大径筒部622C。大径筒部622C和下部构件64C围成本实施例中的第一连接腔61C。大径筒部622C和小径筒部621C共同形成第一台阶部623C,该第一台阶部623C为本实施例中的第一悬挂部,具体地,其下端面部用以与丝杆部件4C上的第一支撑部抵接。弹性元件7C的下端套设在小径筒部621C的外周并抵接在第一台阶部623C上。在电子膨胀阀处于开 阀状态和闭阀状态一中,第一台阶部623C与丝杆部件4C的第一支撑部抵接,丝杆部件4C悬挂地支撑活动连接部件6C。
此处需要说明的是,本实施例中,连接本体62C不设置前述小径筒部621C也是可以的,但作为一种可选方式,小径筒部621C的设置对弹性元件7C具有一定的导向作用。
如图16所示,下部构件64C通过焊接方式固定在连接本体62C的下开口部。作为一种具体设计,下部构件64C包括具有通孔的第一环形套件,其形成有本实施例中的第二支撑部,具体地,在电子膨胀阀处于开阀状态和闭阀状态一过程中,其上端面部与阀针部件5C上的第二悬挂部抵接,在闭阀状态二和闭阀状态三过程中,其下端面部与阀针部件5C上的止挡部抵接。
如图17所示,丝杆部件4C包括丝杆41C和套设并固定在丝杆41C下端部的第一卡合件42C,则,本实施例的丝杆部件连接部包括该第一卡合件42C和丝杆41C的位于第一连接腔61C中的部分。具体设置时,第一卡合件42C为外套并固定在丝杆部件下端部的第二环形套件,该第二环形套件形成有本实施例中的第一支撑部,具体地,如图17所示,第二环形套件的上端面部与第一台阶部623C的下端面部抵接。此外,与实施一不同,本实施例中,丝杆41C上还设置有弹簧支撑部411C。具体地,该弹簧支撑部411C设置于活动连接部件6C的外部并位于活动连接部件6C的上方,具体为丝杆41C沿径向延伸形成的第二径向凸出部。弹性元件7C的另一端与该第二径向凸出部的下端面部抵接。进一步地。在第二径向凸出部的下端面部贴合地设置有一垫圈53C。弹性元件7C的上端与该垫圈53C的下端面部直接抵接,进而与第二径向凸出部间接抵接。垫圈53C的作用是减少丝杆41C与弹性元件7C之间的摩擦力,从而降低阀针51C与丝杆41C之间的摩擦力,防止阀针51C随丝杆41C旋转。可以理解的是,前述的垫圈53C也可设置在第一台阶部623C上,弹性元件7C的下端与垫圈53C直接抵接,也能实施垫圈53C的作用,或者,在第二径向凸出部的下端面部和第一台阶部623C上均设置垫圈53C。
如图17和18所示,阀针部件5C包括阀针51C,阀针51C又具体包括主体部511C、设置于主体部511C下方与可与阀口部21C接触或分离的 流量调节部512C和设置于主体部511C上方的杆部513C。其中,主体部511C可由阀芯套2C的内壁作为导向部对其进行导向,主体部511C与杆部513C共同形成第二台阶部514C。第二台阶部514C形成本实施例中的止挡部。在电子膨胀阀处于开阀状态和闭阀状态一中,第二台阶部514C与下部构件64C的下端面部之间的轴向距离即为本实施例中的预设位移量t 3
其中,本实施例中的阀针部件连接部包括图17状态下杆部513C伸入第一连接腔61C的部分。杆部513C的上端部沿径向延伸形成第一径向凸出部5131C,该第一径向凸出部5131C为本实施例中的第二悬挂部,其下端面部能够与活动连接部件6C的下部构件64C的上端面部抵接以使活动连接部件6C能够悬挂地支撑阀针部件5C。
这里需要指出的是,本实施例中的第二悬挂部直接与阀针51C一体形成,第二悬挂部也可以参照实施例一中的第二悬挂部的形成方式,即,在阀针51C的杆部513C的外周设置一个实施例一中结构相同的第二卡合件。
实际设置时,第一支撑部和第二悬挂部的形成也可不设置成上述结构,两者的设置只要能够与相应的结构配合,以实现上述连接要求即可,如可以具体设置为C型插片等结构。
另外,具体设置时,下部构件64C和与其配合的杆部513C之间具有预设的径向位移量,也就是说,杆部513C的位于第二径向凸台5131C和主体部511C之间的部分与下部构件64C之间具有预设的径向位移量,这样,下部构件64C与杆部513C可在径向上有一定的位移活动空间,阀针部件5C能够自动调准中心,以便使阀针51C的流量调节部512C能够更好地与阀口部21C配合。
类似地,实际设置时,丝杆41C和与其配合的连接本体61C的小径筒部611C之间也设有预设的径向位移量,使两者也能够自适应调准中心。
上面对本实施例中的丝杆部件4C、阀针部件5C和活动连接部件6C的具体结构进行了详细说明,下面结合图24对本实施例电子膨胀阀从图15所示的开阀状态至图18所示的阀紧闭状态的动作进行详细说明。
图15所示的开阀状态至图16所示的闭阀状态一的移动过程如下:
图15所示,电子膨胀阀处于阀针51C与阀口部21C分离的开阀状态。 在此开阀状态下,丝杆部件4C的第一卡合件42C与活动连接部件6C的连接本体62C的第一台阶部623C抵接,从而丝杆部件4C悬挂地支撑活动连接部件6C。阀针51C的杆部513C上的第一径向凸出部5131C的下端面部与活动连接部件6C的下部构件64C的上端面部抵接,从而由活动连接部件6C悬挂地支撑阀针部件5C。从该开阀状态开始,通过电子膨胀阀的转子部件3C驱动丝杆部件4C趋于闭阀方向移动直至阀针51C的流量调节部512C与阀口部21C刚接触来关闭阀口部21C(即到达图16所示的闭阀状态一)过程中,丝杆部件4C、活动连接部件6C、弹性元件7C和阀针部件5C可看做一个整体一起沿轴向趋于闭阀方向移动,四者之间的位置关系保持不变。活动连接部件6C的下端面部与第二台阶部514C之间在轴向保持预设位移量t 3不变。弹性元件7C不产生将阀针51C向阀口部21C推压的弹性力,阀针51C靠其自身重力将阀口部21C关闭。这时,即便阀针51C旋转,阀口部21C也只受到阀针部件5C的自重部分造成的摩擦力,这对阀针51C与阀口部21C的接触面的磨损很小。
图16所示的闭阀状态一至图17所示的闭阀状态二的动作过程如下:
丝杆部件4C在图16所示的闭阀状态一的基础上,沿闭阀方向移动的位移量小于或等于预设位移量t 3时,为闭阀状态二。具体地,从图16所示的闭阀状态一开始,通过转子部件3C进一步驱动丝杆部件4C沿轴向趋于闭阀方向移动过程中,由于阀针51C被阀口部21C部位支撑着,该过程中,丝杆部件4C、弹性元件7C和活动连接部件6C三者可看作一个整体向下趋于闭阀方向移动,以相对于阀针部件5C发生轴向位移。当丝杆部件4C的轴向位移量等于预设位移量t 3时为闭阀状态二的终点,此时,活动连接部件6C的下部构件64C的下端面部与阀针部件5C上的第二台阶部514C(即止挡部)相接触,此时为活动连接部件6C的下部构件64C未对阀针51C的第二台阶部514C施力的瞬间。
在此过程中,弹性元件7C不产生将阀针51C向阀口部21C推压的弹性力,阀针51C和阀口部21C之间也不受弹性元件7C的弹性力影响。阀针51C与阀口部21C之间的磨损是由阀针部件5C的重力产生,其磨损程度很小。
图17所示的闭阀状态二至图18所示的闭阀状态三的动作过程如下:
从图17所示的闭阀状态二开始,通过转子部件3C再进一步驱动丝杆部件4C向下趋于闭阀方向移动,此时,由于阀针51C受阀口部21C部位支撑,而活动连接部件6C的下部构件64C的下端面部抵接在阀针51C的第二台阶部514C上,因此,当丝杆部件4C沿轴向趋于闭阀方向移动时,其上的弹簧支撑部411C(第二径向凸出部)继续推压弹性元件7C沿轴向趋于闭阀方向移动,丝杆部件4C与活动连接部件6C之间发生轴向相对位移,丝杆部件4C不悬挂地支撑活动连接部件6C。弹性元件7C受丝杆部件4C的下压发生弹性变形,其弹性力通过活动连接部件6C传递给阀针51C,也即,弹性元件7C产生将阀针51C向阀口部21C推压的弹性力,该弹性力使阀针51C更可靠的密封阀口部21C,保证阀的断流性。
该过程中,由于弹性元件7C被压缩,若阀针51C与丝杆部件4C之间的摩擦力大于阀针51C与阀口部21C之间的摩擦力,则阀针51C随丝杆部件4C一起相对于阀口部21C发生旋转,阀口部21C的与阀针51C接触的部位受到磨损。若阀针51C与丝杆部件4C之间的摩擦力小于阀针51C与阀口部21C之间的摩擦力,则阀针51C不随丝杆部件4C发生旋转,即阀口部21C的与阀针51C接触的部位无明显磨损。因此,为了减小阀针51C与丝杆部件4C之间的摩擦力,设置了前文所述的垫圈53C。
上述为该电子膨胀阀的闭阀过程,在开阀过程中,阀针51C与阀口部21C分离时也相同,在两者分离的瞬间,阀针51C与阀口部21C之间的摩擦力仅为阀针部件5C自重造成,即便反复动作,阀针51C与阀口部21C接触面的磨损量也极少。
综上可知,本实施例的电子膨胀阀,在阀针51C将阀口部21C关闭的瞬间和阀针51C与阀口部21C分离的瞬间,以及闭阀状态二过程中,阀针51C与阀口部21C之间的摩擦力仅是由阀针部件5C的自重部分造成的力,这样,在即使电子膨胀阀反复动作过程中,阀针51C与阀口部21C的接触面之间的磨损也极小,从而减少了电子膨胀阀闭阀状态时的内泄漏。
下面对本实施例电子膨胀阀的组装方法进行说明,其包括如下步骤:
S01,加工本实施例电子膨胀阀所需的各个零件或零部件。如加工前述图14至图18中所示结构的阀针51C,第二卡合件52C,垫圈53C,弹性元件7C,连接本体62C,下部构件64C,丝杆41C,第一卡合件42C,螺 母部件8C,转子部件3C,上阀体12C,下阀体13C,阀芯套2C,第二接管和第一接管等。其中,加工的阀针包括主体部511C,流量调节部512C和杆部513C,主体部和杆部共同形成第二台阶部514C,该第二台阶部514C作为本实施例中的止挡部,阀针的杆部513C的上端部沿径向凸出形成本实施例中的第二悬挂部。
S1,将弹性元件7C、丝杆部件4C、活动连接部件6C和阀针部件5C组装形成第一组件,并,第一组件中,弹性元件7C的一端抵接于活动连接部件6C,另一端抵接于丝杆部件4C。
步骤S1中又具体包括如下步骤:
SC11,将下部构件64C套设在阀针51C的外周部形成第一分组件,并,具体地,下部构件64C位于阀针的第二悬挂部与止挡部之间;
SC12,将弹性元件7C套设于丝杆41C的外周部,使弹性元件7C的上端与丝杆部件上的第二径向凸出部(即弹簧支撑部)抵接。将丝杆41C的下端部伸入连接本体62C并使弹性元件7C的下端抵接在连接本体62C的第一台阶部623C上,将第一卡合件42C固定在丝杆42C的下端部,形成第二分组件;
SC13,将下部构件64C与连接本体62C的下开口部固定连接形成第一组件。
S2V下阀体13C与阀芯套2C及第一接管和第二接管通过焊接固定形成第二组件。为了简化装配工序,此步骤中,下阀体13C、阀芯套2C、第一接管和第二接管一起通过炉焊一次焊接固定。本实施例中,阀芯套2C置于下阀体13C中且其下端部从下阀体13C中伸出,第二接管焊接在阀芯套2C的下端部的外周,第一接管焊接在下阀体13C的侧壁。
S3,将第一组件中的阀针51C的下端伸入阀芯套2C,使阀针51C和连接本体64C与阀芯套2C间隙配合,这样,阀针51C和连接本体64C轴向移动过程中,阀芯2C能够对二者进行导向。螺母部件8C套设在丝杆41C外周并与丝杆41C螺纹连接;将螺母部件8C与下阀体13C焊接固定;
S4,将丝杆41C与转子部件3C焊接固定;
S5,将上阀体12C与所述下阀体13C焊接固定,完成本实施例电子膨胀阀的装配。
实施例四:
图19为本发明所提供电子膨胀阀第四实施例的剖面示意图,此时阀处于完全打开状态,图20为图19中I 2部位的局部放大图,图21为图19所示电子膨胀阀处于闭阀状态一时的I 4部位的局部放大图,图22为图19所示电子膨胀阀处于闭阀状态二时的I 4部位的局部放大图,图23为图19所示电子膨胀阀处于闭阀状态三时的I 4部位的局部放大图。
其中,在本实施例下文中,定义图19所示的阀完全打开状态为“开阀状态”,此时,丝杆部件4D与活动连接部件6D在轴向仍具有可相对移动的距离,标记为t 4,即本实施例中所述的“预设位移量”;定义阀针部件5D关闭阀口部21D时的状态为“闭阀状态一”,如图21所示,此时,丝杆部件4D与活动连接部件6D在轴向仍具有可相对移动的距离t 4;定义自图21所示的“闭阀状态一”开始至丝杆部件4D趋于闭阀方向移动的轴向位移量小于等于预设位移量t 4期间为“闭阀状态二”,图22所示为轴向位移量=t 4时的结构示意图;定义丝杆部件4D自“闭阀状态一”开始趋于闭阀方向移动的轴向位移量大于预设位移量t 4期间时为“闭阀状态三”,如图23所示。
该电子膨胀阀包括具有阀腔11D的阀体部件1D、阀芯套2D、转子部件3D、丝杆部件4D和阀针部件5D、螺母部件8D。具体地,阀体部件1D包括上阀体12D和下阀体13D,下阀体13D上连接有第一接管,上阀体12D和下阀体13D固定连接形成阀腔11D。转子部件3D、丝杆部件4D和阀针部件5D设置于阀腔11D中。阀芯套2D开设有阀口部21D并与下阀体13D焊接固定。阀芯套2D的下端部从阀腔11D中伸出并连接有第二接管。也即,本实施例中,阀芯套2D部分地设置于阀腔11D中。阀针部件5D设置于阀芯套2D中并可与阀口部21D相接触或分离。转子部件3D包括转子31D以及与转子31D固定连接的连接座32D和与连接座32D固定连接的止动杆33D。螺母部件8D包括与下阀体13D通过连接片84D固定连接的具有内螺纹孔的螺母81D,固定在螺母81D的外周部的弹簧导轨82D,还包括滑环83D,滑环83D可在弹簧导轨82D上沿轴向滑移。螺母部件8D还包括上止动部和下止动部。
其中,设置于阀腔11D中的丝杆部件4D与转子部件3D的上端部固 定连接,丝杆部件4D的外螺纹与固定在阀体部件1D上的螺母部件8D的内螺纹孔配合,丝杆部件4D包括第一支撑部。活动连接部件6D由丝杆部件4D悬挂地支撑,具体地,活动连接部件6D包括第二支撑部和能够由第一支撑部支撑的第一悬挂部。阀针部件5D由活动连接部件6D悬挂地支撑,具体地,阀针部件5D包括由活动连接部件6D的第二支撑部支撑的第二悬挂部。弹性元件7D设置于活动连接部件6D的外部,其一端与活动连接部件6D抵接,另一端与丝杆部件4D抵接。当转子部件3D驱动丝杆部件4D沿阀体部件1D的轴向往复移动时,阀针部件5D在活动连接部件6D的作用下响应丝杆部件4D的动作从而远离或接近阀口部21D以调节电子膨胀阀的开度。具体地,当所述丝杆部件4D移动至第一支撑部支撑第一悬挂部,第二支撑部支撑第二悬挂部时,丝杆部件4D悬挂地支撑活动连接部件6D并能够带动活动连接部件6D沿轴向移动,活动连接部件6D悬挂地支撑阀针部件5D并能够带动阀针部件5D沿轴向移动;当阀针部件5D关闭阀口部21D开始至丝杆部件4D趋于闭阀方向移动预设位移量期间,弹性元件7D不产生将阀针部件5D向阀口部21D推压的弹性力;当阀针部件5D关闭所述阀口部21D开始至丝杆部件4D趋于闭阀方向移动预设位移量以上时,弹性元件7D产生将阀针部件5D向阀口部21D推压的弹性力。
这样,当丝杆部件4D自图20所示的开阀状态趋于闭阀方向移动至阀针部件5D关闭阀口部即图21所示的闭阀状态一的过程中,活动连接部件6D和阀针部件5D也在自身重力作用下发生同步位移,也就是说,在此过程中,丝杆部件4D、活动连接部件6D、弹性元件7D和阀针部件5D四者之间不发生相对位移,可看作一个整体在移动。紧接着,闭阀状态二过程中,即图21所示状态移动至图22所示状态过程中,丝杆部件4D下移,弹性元件7D和活动连接部件6D随丝杆部件4D相对一起相对于阀针部件5D在预设位移量t 4范围内沿轴向趋于闭阀方向移动。该过程中,弹性元件7D不产生将阀针部件5D向闭阀方向推压的弹性力。当丝杆部件4D继续趋于闭阀方向移动,即,在图22所示状态移动至图23所示闭阀状态三过程中,由于活动连接部件6D和阀针部件5D二者之间不发生相对移动,由随着丝杆部件4D的下移,弹性元件7D受压变形,其弹性力通过活动连接 部件6D传递给将阀针部件5D,即,该过程中,弹性元件7D产生将阀针部件5D向阀口部21D推压的弹性力。
本实施例中,为了在上述移动过程更好地保证阀针部件5D的同轴度,阀针部件5D设置于阀芯套2D内,当阀针部件5D沿轴向往复移动时,阀芯套2D的内壁可作为导向部对其进行导向。作为一种具体实施例,活动连接部件6D也大致设置于阀芯套2D内,活动连接部件6D沿轴向往复移动时,阀芯套2D的内壁也可作为导向部对其进行导向。前述的“大致”是指本实施例中,活动连接部件6D的上端有少部分伸出了阀芯套,因此,为避免歧义,使用“大致”一词进行说明。本领域技术人员可以理解的是,本实施例中的活动连接部件6D完全设置于阀芯套2D内也是可以的。可以理解是的,阀针部件5D的下端部也可以伸出阀芯套2D,只要能实现本发明目的即可。
为了更好地理解本方案,下面对本方案中丝杆部件4D、活动连接部件6D和阀针部件5D等各部件的结构设计进行详细介绍。
如图20和图21所示,丝杆部件4D包括丝杆41D和套设并固定在丝杆41D下端部的第一卡合件42D,丝杆41D和第一卡合件42D共同形成第一连接腔43D。第一卡合件42D形成有第一支撑部。具体设置时,丝杆41D的下端部为沿丝杆41D的径向延伸形成的第一环形凸台411D,第一卡合件42D为具有与第一环形凸台411D配合的中通孔的筒状构件,该筒状构件的上端部套设在第一环形凸台的周部并与之焊接固定。该筒状构件的下端部呈缩口状,形成向内凸出的第一凸缘部421D,第一凸缘部421D作为本实施例中的第一支撑部。弹性元件7D的另一端与第一卡合件42D的下端面部抵接。进一步地,为了减少弹性元件7D与第一卡合件42D之间的摩擦力,从而降低阀针51D与丝杆部件4D之间的摩擦力,防止阀针51D随丝杆部件4D进行旋转,在弹性元件7D的上端与第一卡合件42D之间设置有一垫圈53D。
如图20所示,活动连接部件6D包括连接本体62D和下部构件,连接本体62D大至呈杆状,下部构件包括固定在连接本体62D的下端部的第一构件64D和设置于弹性元件7D与第一构件64D之间的第二构件63D。第一构件64D形成有第二支撑部,第二构件63D形成有推压部。弹性元件 7D的下端与推压部抵接,第二构件64D的下端面与第一构件63D的上端面抵接。可以理解的是,此处,第一构件64D与第二构件63D二者之间可以通过焊接等方式固定连接,也可以是在非组装状态下彼此分离的两个独立零部件。
更具体地,如图21所示,连接本体62D具体设计为包括大径段621D、自大径段621D的下端面部沿轴向向阀口部21D方向延伸的小径段622D和伸入第一连接腔43D内的悬挂段623D。大径段621D与小径段622D共同形成第一台阶部624D。悬挂段623D的上端沿径向凸出形成第二凸缘部6231D,即悬挂段623D呈上大下小的倒锥形结构,第二凸缘部6231D作为本实施例中的第一悬挂部能够与第一凸缘部421D配合。
下部构件的第一构件64D具体设计为具有轴向通孔的第一环状件,其套设在连接本体62D的小径段622D的下端部的外周并通过焊接方式与之固定连接。该第一环状件形成有本实施例中的第一支撑部,具体地,由其上端面部直接与阀芯部件5D的第二悬挂部抵接实现支撑。
下部构件的第二构件63D套设于连接本体62D的外周部,具体包括与连接本体62D的小径段622D配合的直筒部631D和自直筒部631D的外壁沿径向延伸形成的第一径向凸出部632D,第一径向凸出部632D形成本实施例中的推压部。第二构件63D的上端面部抵接于第一台阶部624D,弹性元件7D套设于大径段621D的外周部,弹性元件7D的一端与第一径向凸出部624D的上端面部抵接,第一径向出凸624D的下端面能够与阀针部件5D上的止挡部抵接或分离。如图20所示,当电子膨胀阀处于全开状态时,丝杆部件4D悬挂地支撑活动连接部件6D,活动连接部件6D悬挂地支撑着阀针部件5D,此时,第一径向凸出部624D的下端面与止挡部的上端面之间的距离为本实施例中所述的“预设位移量t 4”。可以理解的是,前述的垫圈53D也可设置在弹性元件7D的下端与第一径向凸出部624D的上端面之间。或者,在弹性元件7D的上端与第一卡合件42D的下端面之间以及弹性元件7D的下端与第一径向凸出部624D的上端面之间均设置垫圈53D也是可以的。垫圈53D的作用与前述各实施例中垫圈的作用相同,再此不再重复叙述。
如图20和图22所示,阀针部件5D包括阀针51D和与阀针51D固定 连接的第二卡合件52D。阀针51D又具体包括具有开口腔的主体部511D、设置于主体部511D下方并可与阀口部21D接触或分离的流量调节部512D。阀针51D沿轴向往复移动时主体部511D可由阀芯套2D的内壁作为导向部对其进行导向。第二卡合件52D形成有本实施例的止挡部,具体地,本实施例中,第二卡合件52D为设置于第二构件63D的第一径向凸出部624D(推压部)与第一构件64D之间的环形套件,其与主体部511D的开口部固定连接,其下端部伸入开口腔5111D中,并与阀针51D形成第二连接腔524D。第二卡合件52D的上端面部作为本实施例中与第二构件63D的止推部配合的止挡部。则可以理解,活动连接部件6D的第一构件64D置于该第二连接腔524D中。第二卡合件52D形成有本实施例中的第二悬挂部,具体地设计中,由第二卡合件52D的下端面部作为第二悬挂部与第二支撑部配合。另外,具体设置时,第二卡合件52D与连接本体62D的小径段622D之间具有预设的径向位移量,也就是说,第二卡合件52D可以相对小径段622D在径向上有一定的位移活动空间,这样,阀针部件5D能够自动调准中心,以便使阀针部件5D的流量调节部512D能够很好地与阀口部21D配合。
上面对本实施例中的丝杆部件4D、阀针部件5D和活动连接部件6D的具体结构进行了详细介绍,下面结合图24对本实施例电子膨胀阀从图20所示的开阀状态至图23所示的阀紧闭状态的动作进行详细说明。
图20所示的开阀状态至图21所示的闭阀状态一移动过程如下:
如图20所示,电子膨胀阀处于阀针51D与阀口部21D分离的开阀状态。在此开阀状态下,丝杆部件4D的第一卡合件42D的第一凸缘部421D悬挂支撑着连接本体62D的悬挂段623D的第二凸缘部6231D,从而使丝杆部件4D悬挂地支撑活动连接部件6D。第一构件64D的上端面部与第二卡合件52D的下端面抵接,即,第二支撑部支撑着第二悬挂部,从而活动连接部件6D悬挂地支撑阀针部件5D。此时,第二构件63D的第一径向凸出部632D(推压部)与第二卡合件52D的止挡部之间保持预设位移量t 4不变。
从该开阀状态开始,通过电子膨胀阀的转子部件3D驱动丝杆部件4D趋于闭阀方向移动直至阀针51D的流量调节部512D与阀口部21D接触将 阀口部21D关闭,即到达图21所示的闭阀状态一的过程中,丝杆部件4D、活动连接部件6D、弹性元件7D和阀针部件5D可看做一个整体一起沿轴向趋于闭阀方向移动,丝杆部件4D、活动连接部件6D、阀针部件5D和阀针部件5D四者的相对位置关系与图20所示的开阀状态时一致。第一构件63D的第一径向凸出部632D的下端面与第二卡合件52D的上端面部即止推部之间仍然存在轴向预设位移量t 4,弹性元件7D不会被压缩,不产生将阀针部件5D向阀口部21D推压的弹性力,阀针部件5D靠自身重力作用关闭阀口部21D,阀针部件5D与阀口部21D之间不受弹性元件7D的弹性力影响,即便阀针51D旋转,阀口部21D也只受到阀针部件5D自重部分造成的摩擦力,这对阀针51D与阀口部21D的接触面的磨损很小。
图21所示的闭阀状态一至图22示的闭阀状态二的动作过程如下:
从阀针51D关闭阀口部21D开始,通过转子部件3D进一步驱动丝杆部件4D沿轴向趋于闭阀方向移动,丝杆部件4D推压着弹性元件7D,弹性元件7D推压着活动连接部件6D下移,直至第二构件64D的作为推压部的第一径向凸出部624D与第二卡合件52D的作为止挡部的上端部抵接,即移动至图22所示的闭阀状态二的终点。也就是说,丝杆部件4D自闭阀状态一趋于闭阀方向移动的位移量小于或等于预设位移量t 4的过程,为闭阀状态二。图22所示为丝杆部件4D的位移量等于预设位移量t 4时的状态图,第一径向凸出部624D与第二卡合件52D的作为止挡部的上端部刚接触但未对其施力的瞬间。
该过程中,丝杆部件4D推压着弹性元件7D,弹性元件7D推压着活动连接部件6D下移时,活动连接部件6D与阀针部件5D发生轴向相对位移,即,阀针部件5D靠自身重力作用保持在闭阀状态一时的位置不变,弹性元件7D不对阀针部件5D产生作用力,不产生将阀针部件5D向阀口部21D推压的弹性力。即,阀针51D和阀口部21D的接触面之间不受弹性元件7D的弹性力影响。可见,在整个闭阀状态二过程中,即便阀针51D旋转,阀口部21D也只受到阀针部件5D自重部分造成的摩擦力,这对阀针51D与阀口部21D的接触面的磨损很小。
从图22所示的闭阀状态二至图23所示的闭阀状态三的动作过程如下:
从图22所示的闭阀状态二开始,通过转子部件3D再进一步驱动丝杆 部件4D向下使其趋于闭阀方向移动,由于第二构件64D的第一径向凸出部624D(推压部)与第二卡合件52D上的上端面部(止挡部)抵接着,所以在丝杆部件4D下移的过程中,丝杆部件4D与弹性元件7D相对于活动连接部件6D发生轴向相对移动,从而使弹性元件7D压缩变形产生将阀针51D向阀口部21D推压的弹性力,该弹性力使阀针51D更可靠地密封阀口部21D,将阀口部21D紧闭,保证阀的断流性。
该过程中,由于弹性元件7D被压缩,若阀针51D与丝杆部件4D之间的摩擦力大于阀针51D与阀口部21D之间的摩擦力,则阀针51D随丝杆部件4D一起相对于阀口部21D发生旋转,阀口部21D的与阀针51D接触的部位受到磨损。若阀针51D与丝杆部件4D之间的摩擦力小于阀针51D与阀口部21D之间的摩擦力,则阀针51D不随丝杆部件4D发生旋转,即阀口部21D的与阀针51D接触的部位无明显磨损。因此,为了减小阀针51D与丝杆部件4D之间的摩擦力,设置了前文所述的垫圈53D。
上述为该电子膨胀阀的闭阀过程,在开阀过程中,阀针51D与阀口部21D分离时也相同,在两者分离的瞬间,阀针51D与阀口部21D之间的摩擦力仅为阀针部件5D的自重造成,即便反复动作,阀针51D与阀口部21D接触面的磨损量也极少。
综上可知,本实施例的电子膨胀阀,在阀针51D将阀口部21D关闭的瞬间和阀针51D与阀口部21D分离的瞬间,以及闭阀状态二过程中,阀针51D与阀口部21D之间的摩擦力仅是由阀针部件5D的自重部分造成的力,这样,在即使电子膨胀阀反复动作过程中,阀针51D与阀口部21D的接触面之间的磨损也极小,从而减少了电子膨胀阀闭阀状态时的内泄漏。
下面对本实施例的电子膨胀阀组装方法进行说明:
包括如下步骤:
S01,加工本实施例电子膨胀阀所需的各个零件或零部件。如加工前述图8所示结构的阀针51D,第二卡合件52D,垫圈53D,弹性元件7D,连接本体62D,第二构件63D、第一构件64D,丝杆41D,第一卡合件42D,螺母部件8D,转子部件3D,上阀体12D,下阀体13D,阀芯套2D,第二接管和第一接管等。
S1,将弹性元件7D、丝杆部件4D、活动连接部件6D和阀针部件5D 组装形成第一组件,并,第一组件中,弹性元件7D的一端抵接于活动连接部件6D,另一端抵接于丝杆部件4D;
步骤S1又具体包括以下步骤:
SD11,将连接本体62D的小径段622D的一端穿过第一卡合件42D,之后,位次将将垫圈53D、弹性元件7D、第二构件63D、第二卡合件52D和第一构件64DD套设至连接本体的大径段621D和大径段622D,形成第一分组件。此步骤中需要说明的是,此步骤也可以将连接本体62D的小径段622D的一端穿过第一卡合件42D,依次将弹性元件7D、垫圈53D、第二构件63D、第二卡合件52D和第一构件64DD套设至连接本体的大径段621D和大径段622D,形成第一分组件;或者也可以将连接本体62D的小径段622D的一端穿过第一卡合件42D,依次将垫圈53D、弹性元件7D、垫圈53D、第二构件63D、第二卡合件52D和第一构件64DD套设至连接本体的大径段621D和大径段622D,形成第一分组件,也即设置两个垫圈53D也是可以的。
SD12,将第一分组件中的第一卡合件52D与丝杆41D焊接固定连接并形成第一连接腔43D,将第一分组件中的第二卡合件52D与阀针51D的主体部511D焊接固定连接并形成第二连接腔524D,此步骤中,第一连接腔43D和第二连接腔524D的形成没有先后顺序。
S2,将下阀体13D与阀芯套2D及第一接管和第二接管通过炉焊焊接固定形成第二组件。当然,可以理解的是,此步骤中,也可以采用其它焊接方式将各零件进行连接。本实施例中,阀芯套2D置于下阀体13D中且其下端部从下阀体13D中伸出,第二接管焊接在阀芯套2D的下端部的外周,第一接管焊接在下阀体13D的侧壁。
S3,将第一组件由阀针51D的下端伸入阀芯套2D,使阀针的主体部511D和丝杆部件4D的第二卡合件42D与阀芯套2D间隙配合,以使阀针51D、丝杆部件4D作轴向移动时,阀芯套2D的内壁能够作为导向部对二者进行导向。将螺母部件8D套设在丝杆41D的外周并与丝杆41焊接固定;将螺母部件8D与下阀体13D焊接固定;
S4,将丝杆41D的上端部与转子部件3D焊接固定;
S5,将上阀体12D与下阀体13D焊接固定。完成电子膨胀组装。
需要说明的是,在上述各实施例中,电子膨胀阀的阀口部均设于阀芯套上,具体地,阀芯套为具有芯腔的筒状结构,阀芯套固定在阀体部件上,在阀芯套的周壁上还开设有连通阀芯套内腔与阀芯套外部空间的流通口(22A,22B,22C,22D),以便阀口部处于开启状态下,电子膨胀阀的流体进口和流体出口能够通过阀口部、流通口连通。
另外,阀芯套的上端与螺母部件也可以固定,以提高螺母部件与阀芯套之间的同轴度,从而控制丝杆部件与阀芯套之间的同轴度。
当然,实际设置时,也可将阀口部直接开设于下阀体上或另外设置零件并在其上开设阀口部,并在阀体部件内部设置单独的阀芯套,对各活动连接部件和阀针部件进行导向。同理,各实施例中的阀芯套也可以不与阀体部件直接固定,而将阀芯套固定在其它部件上,再将其它部件与阀体部件固定连接。
在能够实现本发明目的的前提下,阀针部件和活动连接部件可以均设置于阀芯套内,也可以分别部分地设置于阀芯套内,或者一者设于阀芯套内,而另一者不设于阀芯套内。
上述各实施例中的弹性元件具体可选用压缩弹簧。
再者,前述对本发明电子膨胀阀的组装方法进行了举例说明,以便理解本发明技术方案,可以理解的是,上述各步骤的编号只是了为清楚地说明电子膨胀阀的装配步骤,各编号的大小关系并不代表各步骤之间的顺序关系,只要能够实现本电子膨胀阀的组装,各步骤之间的顺序关系可以根据需要灵活调整。
以上对本发明所提供的一种电子膨胀阀及组装方法进行了详细介绍。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方法及其核心思想。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 (34)

  1. 一种电子膨胀阀,包括:
    阀体部件,所述阀体部件具有阀腔;
    转子部件,所述转子部件设置于所述阀腔中;
    丝杆部件,所述丝杆部件能够由所述转子部件驱动相对于所述阀体部件的轴向移动,所述丝杆部件包括第一支撑部;
    活动连接部件,所述活动连接部件包括第二支撑部和第一悬挂部;
    阀针部件,所述阀针部件能够远离或接近阀口部以调节所述电子膨胀阀的开度,所述阀针部件包括第二悬挂部;
    弹性元件,所述弹性元件设置于所述活动连接部件的外部,所述弹性元件的一端与所述活动连接部件抵接,另一端与所述阀针部件抵接;
    所述第一支撑部能够悬挂地支撑所述第一悬挂部,所述第二支撑部能够悬挂地支撑所述第二悬挂部;
    当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向移动预设位移量期间,所述弹性元件不产生将所述阀针部件向所述阀口部推压的弹性力;
    当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向移动预设位移量以上时,所述弹性元件产生将所述阀针部件向所述阀口部推压的弹性力。
  2. 根据权利要求1所述的电子膨胀阀,其特征在于,
    还包括阀芯套,所述阀芯套至少部分地设置于所述阀腔中,并与所述阀体部件固定连接;
    所述阀针部件和所述活动连接部件均至少部分地设置于所述阀芯套中,所述阀芯套的内壁形成对所述活动连接部件和/或所述阀针部件导向的导向部。
  3. 根据权利要求1或2所述的电子膨胀阀,其特征在于,
    所述活动连接部件具有第一连接腔,所述丝杆部件包括伸入所述第一连接腔的丝杆部件连接部,所述丝杆部件连接部形成有所述第一支撑部;
    所述活动连接部件还具有设置于所述第一支撑部下方的止挡部,当所述丝杆部件趋于闭阀方向移动至所述第一支撑部与所述止挡部抵接后,所 述丝杆部件能够推压所述活动连接部件趋于闭阀方向移动,以使所述弹性元件产生将所述阀针部件向所述阀口部推压的弹性力。
  4. 根据权利要求3所述的电子膨胀阀,其特征在于,所述活动连接部件包括带有相互连通的上开口部和下开口部的连接本体、固定在所述上开口部的上部构件和固定在所述下开口部的下部构件;所述连接本体、所述上部构件和所述下部构件形成所述第一连接腔;
    所述上部构件形成有所述第一悬挂部,所述下部构件形成有所述第二支撑部;
    所述弹性元件的一端抵接所述下部构件。
  5. 根据权利要求4所述的电子膨胀阀,其特征在于,
    所述连接本体的内壁沿径向延伸形成第一环形凸台,所述第一环形凸台形成所述止挡部;
    所述上部构件包括具有通孔的第一环状件,所述第一环状件设置在所述丝杆部件的外周,所述第一环状件形成有所述第一悬挂部;
    所述下部构件包括具有通孔的基件,所述基件设置在所述阀针部件的外周,所述基件的内壁沿径向延伸形成第二环形凸台,所述第二环形凸台形成所述第二支撑部。
  6. 根据权利要求1所述的电子膨胀阀,其特征在于,
    所述阀针部件包括阀针,所述阀针包括主体部,流量调节部和杆部,所述主体部与所述杆部之间形成第一台阶部,所述弹性元件的另一端抵接于所述第一台阶部;所述阀针部件还包括第二卡合件,所述第二卡合件设置在所述杆部的外周,所述第二卡合件形成有所述第二悬挂部。
  7. 根据权利要求3所述的电子膨胀阀,其特征在于,
    所述活动连接部件包括带有上开口部的连接本体、固定在所述上开口部的上部构件和与所述连接本体固定连接的下部构件;
    所述连接本体和所述上部构件形成所述第一连接腔,所述上部构件形成有所述第一悬挂部,所述下部构件形成有所述第二支撑部;
    所述弹性元件设置于所述连接本体的外周部,所述弹性元件的一端抵接于所述连接本体。
  8. 根据权利要求7所述的电子膨胀阀,其特征在于,所述连接本体包 括大径段和小径段,所述大径段具有台阶面朝上的阶梯孔,所述阶梯孔的孔壁形成有第一台阶部,所述第一台阶部形成与所述止挡部;
    所述大径段与所述小径段还共同形成台阶面朝下的第二台阶部,所述弹性元件的一端抵接于所述第二台阶部;
    所述上部构件包括具有通孔的第一环状件,所述第一环状件设置在所述丝杆部件的外周,所述第一环状件形成有所述第一悬挂部;
    所述下部构件包括具有通孔的第二环状件,所述第二环状件与所述连接本体固定连接,所述第二环状件形成有所述第二支撑部。
  9. 根据权利要求7所述的电子膨胀阀,其特征在于,
    所述阀针部件包括阀针和第二卡合件;
    所述阀针包括具有开口腔的主体部、流量调节部;
    所述第二卡合件形成有第二悬挂部,所述弹性元件的另一端抵接于所述第二悬挂部;
    所述第二卡合件与所述主体部固定连接并形成第二连接腔,所述第二支撑部设置于所述第二连接腔中。
  10. 根据权利要求9所述的电子膨胀阀,其特征在于,
    所述第二卡合件包括底板部和筒部,所述底板部具有与所述连接本体的小径段配合的通孔,所述底板部形成所述第二悬挂部,所述底板部与所述筒部形成容纳凹腔,所述弹性元件的另一端置于所述容纳凹腔中并与所述底板部抵接。
  11. 根据权利要求3所述的电子膨胀阀,其特征在于,
    所述丝杆部件包括丝杆和与所述丝杆固定连接的第一卡合件,所述丝杆部件连接部包括所述第一卡合件和所述丝杆位于所述第一连接腔中的部分;
    所述第一卡合件包括位于所述上部构件与所述止挡部之间的大径环,所述大径环形成所述第一支撑部。
  12. 一种电子膨胀阀的组装方法,该电子膨胀阀包括:
    阀体部件,所述阀体部件包括上阀体、下阀体,所述阀体部件具有阀腔;
    阀芯套,所述阀芯套至少部分地设置于所述阀腔中;
    转子部件,所述转子部件设置于所述阀腔中;
    丝杆部件,所述丝杆部件包括第一支撑部;
    螺母部件,套设在所述丝杆部件的外周并与所述丝杆部件螺纹连接;
    阀针部件,所述阀针部件能够远离或接近阀口部以调节所述电子膨胀阀的开度,所述阀针部件包括第二悬挂部;
    还包括弹性元件和活动连接部件,所述活动连接部件包括第一悬挂部和第二支撑部;
    所述组装方法包括如下步骤:
    S1,将所述弹性元件、所述丝杆部件、所述活动连接部件和所述阀针部件组装形成第一组件,并,所述第一组件中,所述丝杆部件悬挂地支撑所述活动连接部件,所述活动连接部件悬挂地支撑所述阀针部件,所述弹性元件设置于所述活动连接部件的外部,其一端抵接于活动连接部件,另一端抵接于所述阀针部件;
    S2,所述下阀体与所述阀芯套固定连接形成第二组件;
    S3,将所述第一组件的下端伸入所述阀芯套,将所述螺母部件套设至所述丝杆部件的外周使二者螺纹连接,之后,将所述螺母部件与所述下阀体固定连接;
    S4,将所述丝杆部件与所述转子部件固定连接;
    S5,将所述上阀体与所述下阀体固定连接。
  13. 根据权利要求12所述的电子膨胀阀的组装方法,其特征在于,
    所述活动连接部件包括具有相互连通的上开口部和下开口部的连接本体、上部构件和下部构件,所述连接本体具有能够与所述丝杆部件配合的止挡部,所述上部构件形成有所述第一悬挂部,所述下部构件形成有所述第二支撑部;
    所述丝杆部件包括丝杆和第一卡合件,所述第一卡合件形成有所述第一支撑部;
    所述阀针部件包括阀针和第二卡合件,所述第二卡合件形成所述第二悬挂部;
    则步骤S1中具体包括:
    SA11,所述弹性元件、所述下部构件和所述第二卡合件设置在所述阀 针的外周部,并使所述弹性元件的一端抵接所述下部构件,另一端抵接抵接所述阀针;
    SA12,所述丝杆和所述第一卡合件固定连接,所述上部构件设置至所述丝杆外周部;
    SA13,所述上部构件和所述下部构件分别与所述连接本体的上开口部和下开口部固定连接。
  14. 根据权利要求12所述的电子膨胀阀的组装方法,其特征在于,
    所述活动连接部件包括具有上开口部的连接本体、上部构件和下部构件,所述连接本体具有能够与所述丝杆部件配合的止挡部,所述上部构件形成有所述第一悬挂部,所述下部构件形成有所述第一支撑部;
    所述丝杆部件包括丝杆和第一卡合件,所述第一卡合件形成有所述第一支撑部;
    所述阀针部件包括阀针和第二卡合件,所述第二卡合件形成有所述第二悬挂部;
    则步骤S1中具体包括:
    SB11,所述弹性元件、所述第二卡合件和所述下部构件设置在所述连接本体的外周部后,将所述下部构件与所述连接本体固定连接,并使所述弹性元件的一端抵接所述连接本体,另一端抵接所述第二卡合件;
    SB12,所述丝杆和所述第一卡合件固定连接,所述上部构件设置于所述丝杆外周部;
    SB13,所述上部构件与所述连接本体的所述上开口部固定连接,所述阀针与所述第二卡合件固定连接。
  15. 根据权利要求12-14任一项所述的电子膨胀阀的组装方法,其特征在于,步骤S3中,所述连接本体和所述阀针均与所述阀芯套之间间隙配合,所述阀芯套对所述活动连接部件和所述阀针部件进行导向。
  16. 一种电子膨胀阀,包括:
    阀体部件,所述阀体部件具有阀腔;
    转子部件,所述转子部件设置于所述阀腔中;
    丝杆部件,所述丝杆部件能够由所述转子部件驱动相对于所述阀体部 件的轴向移动,所述丝杆部件包括第一支撑部;
    活动连接部件,所述活动连接部件包括第二支撑部和第一悬挂部;
    阀针部件,所述阀针部件能够远离或接近阀口部以调节所述电子膨胀阀的开度,所述阀针部件包括第二悬挂部;
    弹性元件,所述弹性元件设置于所述活动连接部件的外部,所述弹性元件的一端与所述活动连接部件抵接,另一端与所述丝杆部件抵接;
    所述第一支撑部能够悬挂地支撑所述第一悬挂部,所述第二支撑部能够悬挂地支撑所述第二悬挂部;
    当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向运动预设位移量期间,所述弹性元件不产生将所述阀针部件向所述阀口部推压的弹性力;
    当所述阀针部件关闭所述阀口部开始至所述丝杆部件趋于闭阀方向运动预设位移量以上时,所述弹性元件产生将所述阀针部件向所述阀口部推压的弹性力。
  17. 根据权利要求16所述的电子膨胀阀,其特征在于,
    还包括阀芯套,所述阀芯套至少部分地设置于所述阀腔中,并与所述阀体部件固定连接;
    所述阀针部件和所述活动连接部件均至少部分地设置于所述阀芯套中,所述阀芯套的内壁形成对所述活动连接部件和/或所述阀针部件导向的导向部。
  18. 根据权利要求16或17所述的电子膨胀阀,其特征在于,
    所述活动连接部件具有第一连接腔,所述丝杆部件包括伸入所述第一连接腔的丝杆部件连接部,所述丝杆部件连接部形成有所述第一支撑部;
    所述阀针部件包括位于所述活动连接部件下方的止挡部,当所述丝杆部件趋于闭阀方向运动至所述活动连接部件与所述止挡部抵接后,所述弹性元件能够产生将所述阀针部件向所述阀口部推压的弹性力。
  19. 根据权利要求18所述的电子膨胀阀,其特征在于,
    所述活动连接部件包括连接本体和下部构件;
    所述连接本体具有相互连通的上开口部和下开口部,所述连接本体形成有所述第一悬挂部,所述弹性元件的一端与所述第一悬挂部抵接;
    所述下部构件与所述连接本体固定连接形成所述第一连接腔,所述第一支撑部和所述第二悬挂部设置于所述第一连接腔,所述下部构件形成所述第二支撑部。
  20. 根据权利要求19所述的电子膨胀阀,其特征在于,
    所述连接本体包括设置在所述丝杆部件外周的小径筒部,还包括用以形成所述第一连接腔的大径筒部,所述小径筒部与所述大径筒部形成第一台阶部,所述第一台阶部形成所述第一悬挂部。
  21. 根据权利要求19所述的电子膨胀阀,其特征在于,
    所述阀针部件包括阀针,所述阀针包括主体部,流量调节部和杆部,所述主体部与所述杆部形成第二台阶部,所述第二台阶部形成所述止挡部;
    所述杆部伸入所述第一连接腔的部分具有沿径向延伸形成的第一径向凸出部,所述第一径向凸出部形成所述第二悬挂部。
  22. 根据权利要求18所述的电子膨胀阀,其特征在于,
    所述丝杆部件包括丝杆和与所述丝杆固定连接的第一卡合件,所述丝杆部件连接部包括所述第一卡合件和所述丝杆位于所述第一连接腔中的部分;
    所述第一卡合件形成有所述第一支撑部;
    所述丝杆的位于所述活动连接部件上方的部分设置有弹簧支撑部,所述弹性元件的另一端抵接所述弹簧支撑部。
  23. 根据权利要求22所述的电子膨胀阀,其特征在于,
    所述弹簧支撑部包括所述丝杆沿径向延伸形成的第二径向凸出部,所述弹性元件的另一端与所述第二径向凸出部抵接。
  24. 根据权利要求16或17所述的电子膨胀阀,其特征在于,
    所述阀针部件具有止挡部,所述活动连接部件具有推压部,当所述丝杆部件趋于闭阀方向运动至所述推压部与所述止挡部抵接后,所述弹性元件产生将所述阀针部件向所述阀口部推压的弹性力。
  25. 根据权利要求24所述的电子膨胀阀,其特征在于,
    所述活动连接部件包括连接本体和下部构件,所述连接本体形成有所述第一悬挂部;
    所述下部构件包括与所述连接本体固定连接的第一构件和设置于所述 第一构件与所述弹性元件之间的第二构件,所述第一构件形成有所述第二支撑部,所述第二构件形成有所述推压部,所述弹性元件的一端与所述推压部抵接。
  26. 根据权利要求25所述的电子膨胀阀,其特征在于,
    所述丝杆部件包括丝杆和与所述丝杆固定连接的具有上开口部和下开口部的第一卡合件,所述第一卡合件形成有所述第一支撑部;所述弹性元件的另一端与所述第一卡合件抵接;
    所述丝杆与所述第一卡合件固定连接形成第一连接腔,所述第一悬挂部设置于所述第一连接腔内。
  27. 根据权利要求26所述的电子膨胀阀,其特征在于,
    所述连接本体包括与所述第二构件配合的小径段、与所述弹性元件配合的大径段和伸入所述第一连接腔的悬挂段;
    所述小径段与所述大径段之间形成第一台阶部,所述第二构件与所述第一台阶部抵接;
    所述悬挂段形成有所述第一悬挂部,所述第一卡合件形成有向内凸出的第一凸缘部,所述第一凸缘部形成所述第一支撑部。
  28. 根据权利要27所述的电子膨胀阀,其特征在于,
    所述第二构件设置于所述小径段的外周部,包括与所述小径段配合的直筒部和自所述直筒部的外壁沿径向延伸形成的第一径向凸出部,所述第一径向凸出部形成所述推压部,所述弹性元件的一端抵接所述第一径向凸出部。
  29. 根据权利要求24所述的电子膨胀阀,其特征在于,
    所述阀针部件包括阀针和与所述阀针固定连接的第二卡合件,所述第二卡合件形成有所述第二悬挂部;所述第二悬挂部设置于所述推压部与所述第二支撑部之间,所述阀针与所述第二卡合件形成第二连接腔,所述第二支撑部设置于所述第二连接腔中。
  30. 一种电子膨胀阀的组装方法,该电子膨胀阀包括:
    阀体部件,所述阀体部件包括上阀体、下阀体,所述阀体部件具有阀腔;
    阀芯套,所述阀芯套至少部分地设置于所述阀腔中;
    转子部件,所述转子部件设置于所述阀腔中;
    丝杆部件,所述丝杆部件包括第一支撑部;
    螺母部件,套设在所述丝杆部件的外周并与所述丝杆部件螺纹连接;
    阀针部件,所述阀针部件能够远离或接近阀口以调节所述电子膨胀阀的开度,所述阀针部件包括第二悬挂部;
    还包括弹性元件和活动连接部件,所述活动连接部件包括第一悬挂部和第二支撑部;
    所述组装方法包括如下步骤:
    S1,将所述弹性元件、所述丝杆部件、所述活动连接部件和所述阀针部件组装形成第一组件,并,所述第一组件中,所述丝杆部件悬挂地支撑所述活动连接部件,所述活动连接部件悬挂地支撑所述阀针部件,所述弹性元件设置于所述活动连接部件的外部,其一端与所述活动连接部件抵接,另一端与所述丝杆部件抵接;
    S2,所述下阀体与所述阀芯套固定连接形成第二组件;
    S3,将所述第一组件的下端伸入所述阀芯套,将所述螺母部件套设至所述丝杆部件的外周使二者螺纹连接,之后,将所述螺母部件与所述下阀体固定连接;
    S4,将所述丝杆部件与所述转子部件固定连接;
    S5,将所述上阀体与所述下阀体固定连接。
  31. 根据权利要求30所述的电子膨胀阀的组装方法,其特征在于,
    所述活动连接部件包括具有相互连通的上开口部和下开口部的连接本体、下部构件,所述连接本体形成有所述第一悬挂部,所述下部构件形成有所述第二支撑部;
    所述丝杆部件包括丝杆和第一卡合件,所述丝杆包括弹簧支撑部,所述第一卡合件形成有所述第一支撑部;
    所述阀针部件包括阀针,所述阀针形成有与所述上部构件配合的止挡部,所述阀针部件形成有所述第二悬挂部;
    则步骤S1中具体包括:
    SC11,将所述下部构件安装于所述阀针的外周部;
    SC12,将所述弹性元件套设于所述丝杆部件的外周,并使所述弹性元 件位于所述弹簧支撑部与所述丝杆的下端部之间;将所述丝杆的下端部穿过所述连接本体的所述上开口部与所述第一卡合件固定连接,并使所述弹性元件的一端与所述连接本体抵接,另一端与所述弹簧支撑部抵接;
    SC13,所述下部构件与所述连接本体的所述下开口部固定连接。
  32. 根据权利要求30所述的电子膨胀阀的组装方法,其特征在于,
    所述活动连接部件包括连接本体和下部构件,所述连接本体形成有所述第一悬挂部,所述下部构件形成有推压部和所述第二支撑部;
    所述丝杆部件包括丝杆和第一卡合件,所述第一卡合件形成有所述第一支撑部;
    所述阀针部件包括阀针和第二卡合件,所述第二卡合件形成有所述止挡部和所述第二悬挂部;
    则步骤S1具体包括:
    SD11,将所述第一卡合件、所述弹性元件、所述下部构件、所述第二卡合件和所述连接本体组装形成第一分组件。
    SD12,形成所述第一组件:将所述第一分组件中的所述第一卡合件与所述丝杆固定连接,将所述第一分组件中的所述第二卡合件与所述阀针固定连接。
  33. 根据权利要求32所述的电子膨胀阀的组装方法,其特征在于,所述下部构件包括第一构件和第二构件,所述步骤SD11包括:将所述第二构件套设于所述连接本体的外周部,所述弹性元件套设于所述连接本体的外周部并位于所述第一卡合件与所述第二构件之间;将所述第二卡合件套设于所述第二构件的外周部;将所述第一构件与所述连接本体固定连接。
  34. 根据权利要求30-33任一项所述的电子膨胀阀的组装方法,其特征在于,步骤S3中,所述连接本体和所述阀针均与所述阀芯套之间间隙配合,所述阀芯套对所述活动连接部件和所述阀针部件进行导向。
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