WO2024251090A1 - 电子膨胀阀及组装方法 - Google Patents

电子膨胀阀及组装方法 Download PDF

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Publication number
WO2024251090A1
WO2024251090A1 PCT/CN2024/097124 CN2024097124W WO2024251090A1 WO 2024251090 A1 WO2024251090 A1 WO 2024251090A1 CN 2024097124 W CN2024097124 W CN 2024097124W WO 2024251090 A1 WO2024251090 A1 WO 2024251090A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
section
seat
stop
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2024/097124
Other languages
English (en)
French (fr)
Inventor
黄鸿峰
陈勇好
赵俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dunan Artificial Environment Co Ltd
Original Assignee
Zhejiang Dunan Artificial Environment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Dunan Artificial Environment Co Ltd filed Critical Zhejiang Dunan Artificial Environment Co Ltd
Priority to JP2025554164A priority Critical patent/JP2026513165A/ja
Priority to KR1020257042315A priority patent/KR20260011184A/ko
Publication of WO2024251090A1 publication Critical patent/WO2024251090A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present application relates to the technical field of electronic expansion valves, and in particular to an electronic expansion valve and an assembly method thereof.
  • the radial dimension of the sealing ring formed by the valve needle assembly in the prior art when sealing the valve port is usually the radial dimension of the valve port. It can also be understood that the sealing position of the valve needle assembly on the valve port in the prior art usually falls on the valve port.
  • the valve seat assembly and the valve needle assembly need to be replaced at the same time to ensure that a sealing ring can be formed between the valve needle assembly and the valve port to ensure a sealing effect, which is equivalent to the valve needle assembly and the valve seat assembly needing to be replaced accordingly, increasing the frequency of disassembly and assembly of the electronic expansion valve.
  • the two need to be processed as a group during processing, which increases the processing cost of the valve needle assembly and the valve seat assembly.
  • the present application provides an electronic expansion valve and an assembly method to solve the problem in the prior art that when replacing valve seats of different valve ports according to different situations, the sealing member between the valve needle assembly and the guide seat needs to be replaced together.
  • the present application provides an electronic expansion valve, which includes a valve needle assembly and a valve seat assembly.
  • the valve seat assembly has a second valve chamber and a valve mouth chamber that are interconnected.
  • the valve needle assembly includes a valve core, and the valve core has a stop section.
  • the valve needle assembly is movably inserted into the valve seat assembly to adjust the fluid flow rate flowing through the valve mouth chamber, and the stop section cooperates with the bottom wall stop of the second valve chamber.
  • valve seat assembly includes a guide seat and a valve seat
  • the valve seat has a first valve cavity, a second valve cavity and a valve cavity which are connected and penetrated in sequence
  • the guide seat is penetrated in the valve seat and separates the first valve cavity and the second valve cavity
  • the valve needle assembly and/or the valve seat has a flow channel
  • the first valve cavity and the valve cavity are connected through the flow channel
  • the valve needle assembly passes through the guide seat and is sealed with the inner wall of the guide seat.
  • the second valve chamber and the valve mouth have a stop chamber section and a valve mouth section on opposite sides respectively, the stop chamber section and the valve mouth section are connected, the radial dimension of the stop chamber section is larger than the radial dimension of the valve mouth section, and the stop section and the annular edge stop connected to the stop chamber section and the bottom wall of the second valve chamber cooperate.
  • valve seat assembly includes a guide seat and a valve seat
  • the valve seat includes a seat body and a valve port seat
  • the seat body and the valve port seat are detachably connected
  • the guide seat is inserted into the seat body
  • the stop cavity section and the valve port section are located on the valve port seat
  • the stop cavity section and the valve port section are located on the seat body.
  • the guide seat and the seat body are separately provided, the guide seat and the seat body are limitedly matched, or the guide seat and the seat body are integrally provided.
  • the stop chamber section is a truncated cone section, and the radial dimension of the stop chamber section gradually decreases in the direction of the stop chamber section toward the valve mouth section.
  • the side of the stop chamber section toward the valve mouth section has an annular stop slope for cooperating with the stop chamber section for stopping.
  • the annular stop slope has the same inclination direction as the stop chamber section, and the angle between the annular stop slope and the valve core axis is greater than the angle between the stop chamber section and the valve core axis.
  • the annular edge connecting the stop chamber section to the bottom wall of the second valve chamber and the annular stop slope stop cooperate.
  • the stop cavity section is a cylindrical section, and the side of the stop section facing the valve cavity has an annular stop slope for cooperating with the stop cavity section for stopping, and the annular edge connecting the stop cavity section to the bottom wall of the second valve cavity cooperates with the annular stop slope.
  • valve core includes a sealing section and a blocking section that are detachably connected, the sealing section and the inner wall of the valve seat assembly are sealed together, the blocking section includes a stop section and a flow regulating section connected to the stop section, the radial dimension of the stop section is larger than the radial dimension of the flow regulating section, and the flow regulating section and the valve mouth cavity are limited together.
  • the sealing section and the blocking section have a clamping protrusion and a clamping groove on one side close to each other, and the clamping protrusion and the clamping groove are limitedly matched.
  • valve seat assembly or the valve core has an annular sealing groove
  • electronic expansion valve also includes an annular sealing ring, which is arranged in the annular sealing groove and seals with the valve core and the valve seat assembly respectively.
  • the side of the second valve cavity facing the valve cavity has a stop cavity section for cooperating with the stop section.
  • the valve seat assembly has an annular sealing groove
  • the inner ring of the annular sealing ring is sealed with the valve core
  • the inner diameter of the annular sealing ring is D1
  • the radial dimension of the sealing ring formed by the abutment of the valve core and the stop cavity section is D2, 1 ⁇ D2/D1 ⁇ 1.05
  • the valve core has an annular sealing groove
  • the outer ring of the annular sealing ring is sealed with the valve seat assembly, the outer diameter of the annular sealing ring is D1, and the radial dimension of the sealing ring formed by the abutment of the valve core and the stop cavity section is D2, 1 ⁇ D2/D1 ⁇ 1.05.
  • the electronic expansion valve also includes a shell and a drive assembly, the shell is connected to the valve seat, the drive assembly is arranged in the shell, one end of the drive assembly facing the guide seat is limitedly matched with the guide seat and connected to the valve seat, and the valve needle assembly is sequentially inserted into the drive assembly, the guide seat and the valve seat.
  • valve needle assembly also includes a screw, a connecting piece and an elastic piece.
  • One end of the screw is connected to the drive assembly, and the other end of the screw is connected to the valve core through the connecting piece.
  • the connecting piece is movably arranged in the guide seat and limitedly cooperates with the inner wall of the guide seat.
  • One end of the elastic piece abuts against the valve core, and the other end of the elastic piece abuts against the screw and/or the connecting piece.
  • an assembly method is provided, which is applied to the valve seat assembly of the above-mentioned electronic expansion valve, and the assembly method includes: preparing multiple valve seats, multiple sealing rings formed by the stop section abutting against the bottom walls of multiple second valve chambers have the same radial dimensions, and multiple valve chambers have different radial dimensions; according to needs, one of the suitable valve seats is selected to connect with the guide seat.
  • an electronic expansion valve which includes a valve needle assembly and a valve seat assembly, wherein the valve seat assembly has a second valve cavity and a valve cavity that are interconnected, the valve needle assembly includes a valve core, the valve core has a stopper section, and the valve The needle assembly is movably arranged in the valve seat assembly to adjust the fluid flow through the valve cavity, and the stop section is matched with the bottom wall of the second valve cavity.
  • the stopper section of the valve needle assembly cooperates with the bottom wall stopper of the second valve cavity located above the valve cavity to form a blocking ring.
  • the blocking position of the valve needle assembly for blocking the valve cavity falls on the bottom wall of the second valve cavity, avoiding the situation in the prior art that the blocking position of the valve needle assembly for blocking the valve cavity directly falls on the valve cavity, and the radial size of the valve cavity is the radial size of the blocking ring formed by the two.
  • the blocking position of the valve needle assembly on the valve cavity is expanded and adjusted to the outside of the valve cavity through the stopper section, and the radial size of the formed blocking ring is larger than the radial size of the valve cavity.
  • valve seat assemblies in which multiple valve cavities with different radial dimensions are located to have the same radial dimensions as the sealing ring formed by the stop section of the same valve core, thereby facilitating the replacement of the valve seat assemblies in valve cavities with different radial dimensions while ensuring the sealing position, or facilitating the adjustment of the radial dimensions of the sealing ring by replacing the valve needle assembly and/or the valve seat assembly, thereby facilitating the disassembly, assembly and adjustment of the electronic expansion valve, improving the processing efficiency and applicability of the electronic expansion valve, and reducing the processing cost of the valve seat assembly and the valve needle assembly.
  • FIG1 shows a schematic structural diagram of an electronic expansion valve provided in Embodiment 1 of the present application
  • FIG2 shows a schematic structural diagram of a valve seat in the electronic expansion valve of FIG1 ;
  • FIG3 shows a partial enlarged view of FIG1 ;
  • FIG4 shows a schematic structural diagram of a guide seat in the electronic expansion valve of FIG1 ;
  • FIG5 shows a schematic structural diagram of an electronic expansion valve provided in Embodiment 2 of the present application.
  • FIG6 shows a schematic structural diagram of an electronic expansion valve provided in Embodiment 3 of the present application.
  • FIG7 shows a partial enlarged view of FIG6 ;
  • FIG8 shows a schematic structural diagram of an electronic expansion valve provided in Embodiment 4 of the present application.
  • FIG9 shows a schematic structural diagram of an electronic expansion valve provided in Embodiment 5 of the present application.
  • FIG10 shows a schematic diagram of the structure of an electronic expansion valve provided in Embodiment 6 of the present application.
  • valve needle assembly 11. Screw; 12. Connector; 13. Elastic member; 14. Valve core; 141. Sealing section; 142. Blocking section; 1421. Stopper section; 1422. Flow regulating section; 143. Clamping protrusion; 20. Guide seat; 30. Valve seat; 31. Circulation channel; 32. First valve cavity; 33. Second valve cavity; 331. Stopper cavity section; 34. Valve cavity; 341, valve port section; 35, seat body; 36, valve port seat; 42. Annular sealing ring; 50. Shell; 60. driving assembly; 61. nut assembly; 71. First takeover; 72. Second takeover.
  • embodiment 1 of the present application provides an electronic expansion valve, which includes a valve needle assembly 10 and a valve seat assembly.
  • the valve seat assembly has a second valve chamber 33 and a valve cavity 34 that are interconnected.
  • the valve needle assembly 10 includes a valve core 14, and the valve core 14 has a stop section 1421.
  • the valve needle assembly 10 is movably inserted into the valve seat assembly to adjust the fluid flow rate flowing through the valve cavity 34.
  • the stop section 1421 cooperates with the bottom wall stop of the second valve chamber 33.
  • the stopper section 1421 of the valve needle assembly 10 cooperates with the bottom wall stopper of the second valve cavity 33 located above the valve cavity 34 to form a blocking ring.
  • the blocking position of the valve needle assembly 10 for blocking the valve cavity 34 falls on the bottom wall of the second valve cavity 33, avoiding the situation in the prior art that the blocking position of the valve needle assembly 10 for blocking the valve cavity 34 directly falls on the valve cavity 34, and the radial size of the valve cavity 34 is the radial size of the blocking ring formed by the two.
  • the blocking position of the valve needle assembly 10 on the valve cavity 34 is expanded and adjusted to the outside of the valve cavity 34 through the stopper section 1421, and the radial size of the formed blocking ring is larger than the radial size of the valve cavity 34, so as to facilitate the use of multiple radial sizes.
  • the radial dimensions of the sealing ring formed by the valve seat assembly in valve cavities 34 of different sizes and the stop section 1421 of the same valve core 14 are the same, which makes it easy to replace different valve seat assemblies with valve cavities 34 of different radial dimensions while ensuring that the sealing position remains unchanged, or to adjust the radial dimension of the sealing ring by replacing the stop section 1421 and/or the valve seat assembly of the valve needle assembly 10, thereby facilitating the disassembly, assembly and adjustment of the electronic expansion valve, improving the processing efficiency and applicability of the electronic expansion valve, and reducing the processing cost of the valve seat assembly and the valve needle assembly 10.
  • the valve seat assembly includes a guide seat 20 and a valve seat 30.
  • the valve seat 30 has a first valve cavity 32, a second valve cavity 33 and a valve cavity 34 that are connected and penetrated in sequence.
  • the guide seat 20 is penetrated in the valve seat 30 and separates the first valve cavity 32 and the second valve cavity 33.
  • the valve needle assembly 10 and/or the valve seat 30 has a flow channel 31.
  • the first valve cavity 32 and the valve cavity 34 are connected through the flow channel 31.
  • the valve needle assembly 10 passes through the guide seat 20 and is sealed with the inner wall of the guide seat 20.
  • valve core 14 and the guide seat 20 are sealed together to form a sealing ring, and the radial size of the sealing ring formed between the valve core 14 and the guide seat 20 is adapted to the radial size of the blocking ring.
  • the radial dimensions of the sealing ring formed by the valve seat 30 and the stop section 1421 of the same valve core 14 are the same, and correspond to the radial dimensions of the sealing ring formed between the same group of valve cores 14 and the guide seat 20.
  • the circulation channel 31 in this embodiment is disposed on the valve seat 30 , which facilitates the processing of the circulation channel 31 .
  • both sides of the guide seat 20 have through milling grooves, the outer periphery of the guide seat 20 is limitedly matched with the inner wall of the valve seat 30 , and the gap between the guide seat 20 and the valve seat 30 is the milling groove of the guide seat 20 .
  • the circulation channel 31 is a circulation hole and/or a circulation groove.
  • the interval between the first valve cavity 32 and the second valve cavity 33 mainly emphasizes the disconnection of the position where the first valve cavity 32 is directly connected to the second valve cavity 33.
  • the interval between the first valve cavity 32 and the second valve cavity 33 does not mean that they are completely disconnected.
  • the first valve cavity 32 and the second valve cavity 33 are connected through the circulation channel 31 and the valve cavity 34.
  • the electronic expansion valve is in the closed state, the first valve cavity 32 and the second valve cavity 33 are not connected.
  • the valve seat 30 has a variety of different specifications.
  • Another embodiment of the present application provides an assembly method, which is applied to the valve seat assembly of the above-mentioned electronic expansion valve.
  • the assembly method includes: preparing a plurality of valve seats 30, the radial dimensions of the plurality of sealing rings formed by the stop section 1421 abutting against the bottom walls of the plurality of second valve chambers 33 are the same, and the radial dimensions of the plurality of valve chambers 34 are different; according to the needs, one of the suitable valve seats 30 is selected to connect with the guide seat 20.
  • the bottom wall of the second valve cavity 33 of the multiple valve seats 30 and the multiple sealing rings formed by the stop section 1421 of the same valve needle assembly 10 have the same radial dimensions, and the radial dimensions of the multiple sealing rings are all adapted to the radial dimensions of the sealing ring formed between the valve core 14 and the guide seat 20, that is, the same group of valve needle assemblies 10 and guide seats 20 can correspond to valve seats 30 with multiple valve cavities 34 with different radial dimensions.
  • the same group of valve needle assemblies 10 and guide seats 20 can correspond to valve seats 30 with multiple valve cavities 34 with different radial dimensions.
  • the second valve cavity 33 and the valve cavity 34 have a stopper cavity section 331 and a valve port section 341 on the opposite side, respectively.
  • the stopper cavity section 331 and the valve port section 341 are connected, the radial dimension of the stopper cavity section 331 is larger than the radial dimension of the valve port section 341, and the stopper section 1421 and the stopper cavity section 331 are matched.
  • the stopper section 1421 and the stopper cavity section 331 are matched to form a blocking ring for blocking the valve port section 341, which is convenient for determining the position of the formed blocking ring, ensuring the correspondence between the blocking ring and the sealing ring, and at the same time will not affect the radial dimension of the valve port section 341, which is convenient for processing the stopper section 1421, the stopper cavity section 331 and the valve port section 341.
  • the valve seat assembly includes a guide seat 20 and a valve seat 30.
  • the valve seat 30 includes a seat body 35 and a valve port seat 36.
  • the seat body 35 and the valve port seat 36 are detachably connected.
  • the guide seat 20 is inserted into the seat body 35.
  • the guide seat 20 and the seat body 35 are separately arranged, and the stopper cavity section 331 and the valve port section 341 are located on the seat body 35.
  • This arrangement is convenient for the seat
  • the stopper cavity section 331 is a truncated cone section, the radial dimension of the stopper cavity section 331 gradually decreases in the direction from the stopper cavity section 331 to the valve port section 341, the stopper section 1421 has an annular stopper slope on the side facing the valve port 34 for cooperating with the stopper cavity section 331, the annular stopper slope has the same inclination direction as the stopper cavity section 331, the angle between the annular stopper slope and the axis of the valve core 14 is greater than the angle between the stopper cavity section 331 and the axis of the valve core 14, the annular edge connecting the stopper cavity section 331 to the bottom wall of the second valve cavity 33 and the annular stopper slope cooperate in the stopper.
  • the position of the blocking ring is determined at the connection position between the stopper cavity section 331 and the bottom wall of the second valve cavity 33, and the position of the blocking ring is limited by the inclination angle between the annular stopper slope and the stopper cavity section 331.
  • the annular stopper slope is in the same inclination direction as the stopper cavity section 331, which facilitates the diversion of the fluid flowing through, and also facilitates the processing of the stopper cavity section 331 and the expansion and upward adjustment of the sealing ring.
  • the valve core 14 includes a detachably connected sealing section 141 and a blocking section 142, the sealing section 141 and the inner wall of the guide seat 20 of the valve seat assembly are sealed, the blocking section 142 includes a stop section 1421 and a flow regulating section 1422 connected to the stop section 1421, the radial dimension of the stop section 1421 is larger than the radial dimension of the flow regulating section 1422, and the flow regulating section 1422 and the valve cavity 34 are matched.
  • This arrangement facilitates the setting of the sealing position of the valve core 14 and the guide seat 20, and at the same time, the stop section 1421 facilitates the limitation of the valve core 14, and the movement of the flow regulating section 1422 relative to the valve cavity 34 facilitates the adjustment of the fluid flow through the valve cavity 34.
  • the sealing section 141 and the blocking section 142 have a clamping protrusion 143 and a clamping groove on one side close to each other, and the clamping protrusion 143 and the clamping groove are limitedly matched.
  • This arrangement facilitates the positioning and connection of the sealing section 141 and the blocking section 142, and ensures the reliability of the connection between the sealing section 141 and the blocking section 142.
  • the valve core 14 can also replace the blocking section 142 to correspond to different flow curve requirements.
  • the staff can determine the replacement of the stop section 1421 and the flow regulating section 1422 according to the actual situation.
  • the stop section 1421 is not changed to avoid affecting the size of the blocking ring formed by the stop section 1421 and the bottom wall of the second valve cavity 33, thereby affecting the movement effect of the valve core 14.
  • the clamping protrusion 143 is provided on the sealing section 141
  • the clamping groove is provided on the blocking section 142 .
  • the guide seat 20 or the valve core 14 of the valve seat assembly has an annular sealing groove
  • the electronic expansion valve further includes an annular sealing ring 42, which is arranged in the annular sealing groove and respectively seals with the valve core 14 and the guide seat 20.
  • This arrangement facilitates the sealing cooperation between the guide seat 20 and the sealing section 141 of the valve core 14, and at the same time facilitates the spacing between the first valve cavity 32 and the second valve cavity 33.
  • the annular sealing groove in this embodiment is located on the guide seat 20 of the valve seat assembly, the second valve cavity 33 has a stopper cavity section 331 for stoppering with the stopper section 1421 on the side facing the valve cavity 34, the inner ring of the annular sealing ring 42 is sealed with the valve core 14 to form a sealing ring, the inner diameter of the annular sealing ring 42 is D1, the radial dimension of the sealing ring formed by the valve core 14 and the stopper cavity section 331 is D2, 1 ⁇ D2/D1 ⁇ 1.05.
  • the inner diameter of the annular sealing ring 42 is the radial dimension of the sealing ring, and by limiting D1 and D2, the situation that the valve needle assembly 10 is hindered from moving due to the differential pressure can be effectively suppressed.
  • the electronic expansion valve further includes a housing 50 and a drive assembly 60, the housing 50 is connected to the valve seat 30, the drive assembly 60 is arranged in the housing 50, one end of the drive assembly 60 facing the guide seat 20 is limitedly matched with the guide seat 20 and connected to the valve seat 30, and the valve needle assembly 10 is sequentially inserted into the drive assembly 60, the guide seat 20 and the valve seat 30. In this way, the valve needle assembly 10 is driven by the drive assembly 60, so as to realize the conversion between the opening and closing of the electronic expansion valve.
  • the installation process of the electronic expansion valve in this embodiment at least includes: firstly installing the other parts of the valve needle assembly 10 except the plugging section 142 of the valve core 14, then assembling the installed part of the valve needle assembly 10 in the guide seat 20, then press-fitting and welding the plugging section 142 at one end of the valve needle assembly 10 passing through the guide seat 20, and then press-fitting the connected valve needle assembly 10 and the guide seat 20 into the valve seat 30 together.
  • the electronic expansion valve further includes a first connecting pipe 71 and a second connecting pipe 72
  • the driving assembly 60 includes a nut assembly 61
  • the first connecting pipe 71 is connected to the second valve cavity 33
  • the second connecting pipe 72 is connected to the valve cavity 34
  • the nut assembly 61 has a first balancing hole and a second balancing hole to connect the first valve cavity 32 and the cavity in the nut assembly 61
  • the first connecting pipe 71 and the second valve cavity 33 are always connected and the pressure is P1
  • the second connecting pipe 72 is connected to the valve cavity 34 and the pressure is P2
  • the pressure of the cavity surrounded by the nut assembly 61 and the valve needle assembly 10 is P 3
  • P2 and P3 maintain dynamic balance
  • the valve cavity 34 is connected with the cavity where the nut assembly 61 is located through the flow channel 31, the first valve cavity 32, the first balancing hole, and the second balancing hole
  • D3 is the minimum radial dimension of the connecting channel between the cavity where P2 is located and the cavity
  • D3 is the radial dimension of the second balancing hole on the nut assembly 61 (that is, the balancing hole connecting the internal cavity of the shell 50 and the internal cavity of the nut assembly 61), and the flow mode from the first connecting pipe 71 to the second connecting pipe 72 is set to forward flow, and vice versa.
  • the valve needle assembly 10 further includes a screw 11, a connector 12 and an elastic member 13.
  • One end of the screw 11 is connected to the drive assembly 60, and the other end of the screw 11 is connected to the valve core 14 through the connector 12.
  • the connector 12 is movably arranged in the guide seat 20 and is limitedly matched with the inner wall of the guide seat 20.
  • One end of the elastic member 13 abuts against the valve core 14, and the other end of the elastic member 13 abuts against the screw 11 and/or the connector 12.
  • This arrangement facilitates the driving assembly 60 to drive the valve needle assembly 10, and at the same time, the guide seat 20 is used to accommodate and guide the valve needle assembly 10, thereby ensuring the reliability of the operation of the valve needle assembly 10.
  • the second embodiment of the present application provides an electronic expansion valve, which is different from the first embodiment in that the annular sealing groove in the present embodiment is located on the valve core 14.
  • the outer ring of the annular sealing ring 42 is sealed with the guide seat 20 to form a sealing ring.
  • the outer diameter of the annular sealing ring 42 is D1
  • the diameter of the sealing ring formed by the abutment of the valve core 14 and the stopper cavity section 331 is
  • the radial dimension is D2, 1 ⁇ D2/D1 ⁇ 1.05.
  • the outer diameter of the annular sealing ring 42 is the radial dimension of the sealing ring.
  • the third embodiment of the present application provides an electronic expansion valve, which is different from the second embodiment in that the stopper cavity section 331 in this embodiment is a cylindrical section, and the side of the stopper section 1421 facing the valve cavity 34 has an annular stopper slope for cooperating with the stopper cavity section 331, and the annular edge of the stopper cavity section 331 connected to the bottom wall of the second valve cavity 33 cooperates with the annular stopper slope.
  • This arrangement facilitates the processing of the stopper cavity section 331, the expansion and upward adjustment of the sealing ring, and the determination of the position of the sealing ring.
  • the valve core 14 in this embodiment is arranged in an integrated manner, which ensures the overall structural strength of the valve core 14.
  • the fourth embodiment of the present application provides an electronic expansion valve, which is different from the third embodiment in that the annular sealing groove in the present embodiment is located on the guide seat 20, at which time, the inner ring of the annular sealing ring 42 is sealed with the valve core 14 to form a sealing ring, the inner diameter of the annular sealing ring 42 is D1, and the radial dimension of the sealing ring formed by the valve core 14 and the stopper cavity section 331 is D2, 1 ⁇ D2/D1 ⁇ 1.05. In this way, by limiting D1 and D2, it is possible to effectively suppress the situation where the valve needle assembly 10 is hindered from moving due to the differential pressure.
  • the fifth embodiment of the present application provides an electronic expansion valve, which is different from the third embodiment in that the stopper cavity section 331 and the valve port section 341 in the present embodiment are located on the valve port seat 36.
  • the sixth embodiment of the present application provides an electronic expansion valve, which is different from the fifth embodiment in that the guide seat 20 and the seat body 35 are integrally arranged.
  • This arrangement facilitates the coaxiality between the two, thereby ensuring the coaxiality of the housing 50, the nut assembly 61, the valve seat 36 and other components connected thereto, and ensuring the reliability of the electronic expansion valve.

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Abstract

公开了一种电子膨胀阀及组装方法。电子膨胀阀包括阀针组件(10)以及阀座组件，阀座组件具有相互连通的第二阀腔(33)和阀口腔(34)，阀针组件包括阀芯(14)，阀芯具有止挡段(1421)，阀针组件可移动地穿设在阀座组件内，以调节流经阀口腔的流体流量，止挡段和第二阀腔的底壁止挡配合。通过该电子膨胀阀，便于多个径向尺寸不同的阀口腔所在的阀座组件与同一阀芯的止挡段形成的封堵环的径向尺寸均相同，便于在保证封堵位置的情况下实现对具有不同径向尺寸的阀口腔的阀座组件的更换，或，便于通过更换阀针组件和/或阀座组件以达到调整封堵环的径向尺寸的目的，便于对电子膨胀阀的拆装调整，提高电子膨胀阀的加工效率和适用性。

Description

电子膨胀阀及组装方法
本申请要求于2023年06月06日提交至中国国家知识产权局，申请号为202310664114.5名称为“电子膨胀阀”的专利申请的优先权。
技术领域
本申请涉及电子膨胀阀技术领域，具体而言，涉及一种电子膨胀阀及组装方法。
背景技术
现有技术中的阀针组件在封堵阀口时与阀口形成的封堵环的径向尺寸通常即为阀口的径向尺寸，也可以理解为，现有技术中的阀针组件对阀口的封堵位置通常落在阀口上。
在需要对电子膨胀阀进行适应性拆装调整时，即需要更换电子膨胀阀的阀口尺寸时，需要同时更换阀座组件和阀针组件，保证阀针组件和阀口之间能够形成封堵环以保证封堵效果，相当于阀针组件与阀座组件需要对应更换，增大了对电子膨胀阀的拆装频率，同时，由于阀针组件和阀座组件的阀口的对应，加工时需要二者对应为组进行加工，增大了对阀针组件和阀座组件的加工成本。
发明内容
本申请提供了一种电子膨胀阀及组装方法，以解决现有技术中，在根据不同情况更换不同阀口的阀座时需要连同阀针组件与导向座之间的密封件一同更换的问题。
为了解决上述问题，根据本申请的一个方面，本申请提供了一种电子膨胀阀，电子膨胀阀包括阀针组件以及阀座组件，阀座组件具有相互连通的第二阀腔和阀口腔，阀针组件包括阀芯，阀芯具有止挡段，阀针组件可移动地穿设在阀座组件内，以调节流经阀口腔的流体流量，止挡段和第二阀腔的底壁止挡配合。
进一步地，阀座组件包括导向座和阀座，阀座具有顺次连通且贯穿的第一阀腔、第二阀腔和阀口腔，导向座穿设在阀座内并间隔第一阀腔和第二阀腔，阀针组件和/或阀座具有流通通道，第一阀腔和阀口腔通过流通通道连通，阀针组件穿过导向座并和导向座的内壁密封配合。
进一步地，第二阀腔和阀口腔相对的一侧分别具有止挡腔段和阀口段，止挡腔段和阀口段连通，止挡腔段的径向尺寸大于阀口段的径向尺寸，止挡段和止挡腔段与第二阀腔底壁连接的环形边缘止挡配合。
进一步地，阀座组件包括导向座和阀座，阀座包括座体和阀口座，座体和阀口座可拆卸地连接，导向座穿设在座体内，止挡腔段和阀口段位于阀口座上，或，止挡腔段和阀口段位于座体上。
进一步地，导向座和座体分体设置，导向座和座体限位配合，或，导向座和座体一体设置。
进一步地，止挡腔段为圆台段，止挡腔段的径向尺寸在止挡腔段朝向阀口段的方向上逐渐减小，止挡段朝向阀口腔的一侧具有用于和止挡腔段止挡配合的环形止挡斜面，环形止挡斜面与止挡腔段的倾斜方向相同，环形止挡斜面与阀芯轴线之间的夹角角度大于止挡腔段与阀芯轴线之间的夹角角度，止挡腔段与第二阀腔底壁连接的环形边缘和环形止挡斜面止挡配合。
进一步地，止挡腔段为圆柱段，止挡段朝向阀口腔的一侧具有用于和止挡腔段止挡配合的环形止挡斜面，止挡腔段与第二阀腔底壁连接的环形边缘和环形止挡斜面止挡配合。
进一步地，阀芯包括可拆卸连接的密封段和封堵段，密封段和阀座组件的内壁密封配合，封堵段包括止挡段和与止挡段连接的流量调节段，止挡段的径向尺寸大于流量调节段的径向尺寸，流量调节段和阀口腔限位配合。
进一步地，密封段和封堵段相互靠近的一侧分别具有卡接凸起和卡接凹槽，卡接凸起和卡接凹槽限位配合。
进一步地，阀座组件或阀芯具有环形密封槽，电子膨胀阀还包括环形密封圈，环形密封圈设置在环形密封槽内并分别和阀芯、阀座组件密封配合。
进一步地，第二阀腔朝向阀口腔的一侧具有用于和止挡段止挡配合的止挡腔段，在阀座组件具有环形密封槽的情况下，环形密封圈的内圈和阀芯密封配合，环形密封圈的内径为D1，阀芯和止挡腔段抵接形成的封堵环的径向尺寸为D2，1≤D2/D1≤1.05；或，在阀芯具有环形密封槽的情况下，环形密封圈的外圈与阀座组件密封配合，环形密封圈的外径为D1，阀芯和止挡腔段抵接形成的封堵环的径向尺寸为D2，1≤D2/D1≤1.05。
进一步地，电子膨胀阀还包括壳体和驱动组件，壳体和阀座连接，驱动组件设置在壳体内，驱动组件朝向导向座的一端和导向座限位配合并和阀座连接，阀针组件顺次穿设在驱动组件、导向座和阀座内。
进一步地，阀针组件还包括螺杆、连接件和弹性件，螺杆的一端和驱动组件连接，螺杆的另一端通过连接件和阀芯连接，连接件可移动地设置在导向座内并和导向座的内壁限位配合，弹性件的一端和阀芯抵接，弹性件的另一端与螺杆和/或连接件抵接。
根据本申请的另一方面，提供了一种组装方法，组装方法应用于上述的电子膨胀阀的阀座组件，组装方法包括：准备多个阀座，止挡段与多个第二阀腔的底壁抵接形成的多个封堵环的径向尺寸相同，多个阀口腔的径向尺寸不同；根据需求选取其中一个适配的阀座与导向座连接。
应用本申请的技术方案，提供了一种电子膨胀阀，电子膨胀阀包括阀针组件以及阀座组件，阀座组件具有相互连通的第二阀腔和阀口腔，阀针组件包括阀芯，阀芯具有止挡段，阀 针组件可移动地穿设在阀座组件内，以调节流经阀口腔的流体流量，止挡段和第二阀腔的底壁止挡配合。
本方案中，阀针组件的止挡段与位于阀口腔上方的第二阀腔的底壁止挡配合并形成封堵环。采用本方案，将阀针组件用于封堵阀口腔的封堵位置落在第二阀腔的底壁上，避免了现有技术中阀针组件用于封堵阀口腔的封堵位置直接落于阀口腔上，阀口腔的径向尺寸即为二者形成的封堵环的径向尺寸的情况，通过止挡段将阀针组件对阀口腔的封堵位置外扩上调至阀口腔外，并使得形成的封堵环的径向尺寸大于阀口腔的径向尺寸。这样便于多个径向尺寸不同的阀口腔所在的阀座组件与同一阀芯的止挡段形成的封堵环的径向尺寸均相同，便于在保证封堵位置的情况下对具有不同径向尺寸的阀口腔的阀座组件的更换，或，便于通过更换阀针组件和/或阀座组件以达到调整封堵环的径向尺寸的目的，便于对电子膨胀阀的拆装调整，提高电子膨胀阀的加工效率和适用性，降低了对阀座组件和阀针组件的加工成本。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了本申请的实施例一提供的电子膨胀阀的结构示意图；
图2示出了图1的电子膨胀阀中的阀座的结构示意图；
图3示出了图1的局部放大图；
图4示出了图1的电子膨胀阀中的导向座的结构示意图；
图5示出了本申请的实施例二提供的电子膨胀阀的结构示意图；
图6示出了本申请的实施例三提供的电子膨胀阀的结构示意图；
图7示出了图6的局部放大图；
图8示出了本申请的实施例四提供的电子膨胀阀的结构示意图；
图9示出了本申请的实施例五提供的电子膨胀阀的结构示意图；
图10示出了本申请的实施例六提供的电子膨胀阀结构示意图。
其中，上述附图包括以下附图标记：
10、阀针组件；11、螺杆；12、连接件；13、弹性件；14、阀芯；141、密封段；142、封
堵段；1421、止挡段；1422、流量调节段；143、卡接凸起；
20、导向座；
30、阀座；31、流通通道；32、第一阀腔；33、第二阀腔；331、止挡腔段；34、阀口腔；
341、阀口段；35、座体；36、阀口座；
42、环形密封圈；
50、壳体；
60、驱动组件；61、螺母组件；
71、第一接管；72、第二接管。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1至图4所示，本申请的实施例一提供了一种电子膨胀阀，电子膨胀阀包括阀针组件10以及阀座组件，阀座组件具有相互连通的第二阀腔33和阀口腔34，阀针组件10包括阀芯14，阀芯14具有止挡段1421，阀针组件10可移动地穿设在阀座组件内，以调节流经阀口腔34的流体流量，止挡段1421和第二阀腔33的底壁止挡配合。
在本实施例中，阀针组件10的止挡段1421与位于阀口腔34上方的第二阀腔33的底壁止挡配合并形成封堵环。采用本实施例的电子膨胀阀，将阀针组件10用于封堵阀口腔34的封堵位置落在第二阀腔33的底壁上，避免了现有技术中阀针组件10用于封堵阀口腔34的封堵位置直接落于阀口腔34上，阀口腔34的径向尺寸即为二者形成的封堵环的径向尺寸的情况，通过止挡段1421将阀针组件10对阀口腔34的封堵位置外扩上调至阀口腔34外，并使得形成的封堵环的径向尺寸大于阀口腔34的径向尺寸，便于使多个径向尺寸不同的阀口腔34所在的阀座组件与同一阀芯14的止挡段1421形成的封堵环的径向尺寸均相同，进而便于在保证封堵位置不变的情况下实现对具有不同径向尺寸的阀口腔34的不同阀座组件的更换，或，便于通过更换阀针组件10的止挡段1421和/或阀座组件以达到调整封堵环的径向尺寸的目的，便于对电子膨胀阀的拆装调整，提高电子膨胀阀的加工效率和适用性，降低了对阀座组件和阀针组件10的加工成本。
如图1至图4所示，阀座组件包括导向座20和阀座30，阀座30具有顺次连通且贯穿的第一阀腔32、第二阀腔33和阀口腔34，导向座20穿设在阀座30内并间隔第一阀腔32和第二阀腔33，阀针组件10和/或阀座30具有流通通道31，第一阀腔32和阀口腔34通过流通通道31连通，阀针组件10穿过导向座20并和导向座20的内壁密封配合。
在本实施例中，阀芯14和导向座20密封配合形成密封环，阀芯14、导向座20之间形成的密封环的径向尺寸和封堵环的径向尺寸相适配。这样便于多个径向尺寸不同的阀口腔34所 在的阀座30与同一阀芯14的止挡段1421形成的封堵环的径向尺寸均相同，并与同一组阀芯14与导向座20之间形成的密封环的径向尺寸对应，在对阀座30进行加工或更换时，不需再对应多个阀针组件10、导向座20之间的密封件加工多个阀座30，或需要同时更换阀座30和对应的阀针组件10、导向座20之间密封件的情况，实现一个密封件对应多个不同径向尺寸的阀口腔34的阀座30，便于提高电子膨胀阀的加工效率，同时可以使多个零部件标准化，减少非标产品，便于零部件管控。
具体地，本实施例中的流通通道31设置在阀座30上，便于对流通通道31的加工。
可选地，导向座20的两侧具有贯穿的铣槽，导向座20的外周与阀座30的内壁限位配合，导向座20和阀座30之间的间隙即为导向座20的铣槽。
可选地，流通通道31为流通孔和/或流通槽。其中，第一阀腔32和第二阀腔33的间隔主要强调的是第一阀腔32直接和第二阀腔33连通的位置的断开，第一阀腔32和第二阀腔33的间隔不等于完全不连通，在本实施例中，在电子膨胀阀处于开阀状态时，第一阀腔32和第二阀腔33通过流通通道31、阀口腔34连通，在电子膨胀阀处于关阀状态时，第一阀腔32和第二阀腔33不连通。
具体地，当产品因不同流量曲线要求有不同规格时，阀座30对应有多种不同规格，本申请的另一实施例提供了一种组装方法，其应用于上述的电子膨胀阀的阀座组件，组装方法包括：准备多个阀座30，止挡段1421与多个第二阀腔33的底壁抵接形成的多个封堵环的径向尺寸相同，多个阀口腔34的径向尺寸不同；根据需求选取其中一个适配的阀座30与导向座20连接。这样设置，多个阀座30的第二阀腔33的底壁与同一阀针组件10的止挡段1421形成的多个封堵环的径向尺寸均相同，且多个封堵环的径向尺寸均与阀芯14、导向座20之间形成的密封环的径向尺寸适配，即同一组阀针组件10和导向座20可对应多个径向尺寸不同的阀口腔34的阀座30，加工时不需要一个密封件对应一个阀座30去加工，实现了一个密封件对应多个阀座30，且在对阀座组件进行安装时，也可以根据需求在多个阀座30中选取阀口腔34径向尺寸最适配的一个进行更换和安装，不需再更换与封堵环适配的阀针组件10、导向座20之间密封件，便于提高电子膨胀阀的适用性以及加工的便利性。
如图3所示，第二阀腔33和阀口腔34相对的一侧分别具有止挡腔段331和阀口段341，止挡腔段331和阀口段341连通，止挡腔段331的径向尺寸大于阀口段341的径向尺寸，止挡段1421和止挡腔段331止挡配合。这样设置，通过止挡段1421和止挡腔段331的止挡配合，以形成用于封堵阀口段341的封堵环，便于确定形成的封堵环的位置，保证封堵环和密封环的对应，同时不会影响阀口段341的径向尺寸，便于止挡段1421、止挡腔段331和阀口段341的加工。
如图1至图3所示，阀座组件包括导向座20和阀座30，阀座30包括座体35和阀口座36，座体35和阀口座36可拆卸地连接，导向座20穿设在座体35内，在本实施例中，导向座20和座体35分体设置，且止挡腔段331和阀口段341位于座体35上。这样设置，便于座 体35和阀口座36的加工，当产品因不同流量曲线要求有不同规格时，只需在保证形成的封堵环与密封环的对应的基础上更换座体35即可，便于提高电子膨胀阀的加工效率。
具体地，止挡腔段331为圆台段，止挡腔段331的径向尺寸在止挡腔段331朝向阀口段341的方向上逐渐减小，止挡段1421朝向阀口腔34的一侧具有用于和止挡腔段331止挡配合的环形止挡斜面，环形止挡斜面与止挡腔段331的倾斜方向相同，环形止挡斜面与阀芯14轴线之间的夹角角度大于止挡腔段331与阀芯14轴线之间的夹角角度，止挡腔段331与第二阀腔33底壁连接的环形边缘和环形止挡斜面止挡配合。这样设置，将封堵环的位置确定在止挡腔段331与第二阀腔33底壁的连接位置，并通过对环形止挡斜面与止挡腔段331的倾斜角度保证了对封堵环位置的限制。另一方面，环形止挡斜面与止挡腔段331的倾斜方向相同，便于对流经的流体的导流，同时便于止挡腔段331的加工以及对封堵环的外扩和上调。
如图3所示，阀芯14包括可拆卸连接的密封段141和封堵段142，密封段141和阀座组件的导向座20内壁密封配合，封堵段142包括止挡段1421和与止挡段1421连接的流量调节段1422，止挡段1421的径向尺寸大于流量调节段1422的径向尺寸，流量调节段1422和阀口腔34配合。这样设置，便于阀芯14与导向座20的密封位置的设置，同时，通过止挡段1421便于实现对阀芯14的限位，通过流量调节段1422相较于阀口腔34的移动便于对流经阀口腔34的流体流量的调节。
具体地，密封段141和封堵段142相互靠近的一侧分别具有卡接凸起143和卡接凹槽，卡接凸起143和卡接凹槽限位配合。这样设置，便于密封段141和封堵段142的定位和连接，保证密封段141和封堵段142连接的可靠性，另外，当有不同流量曲线的要求的不同规格的电子膨胀阀时，阀芯14也可以更换封堵段142来对应不同的流量曲线要求，具体地，更换封堵段142时，工作人员可根据实际情况判断止挡段1421与流量调节段1422的替换情况，例如，更换不同流量调节段1422但止挡段1421相同的封堵段142，仅实现对流量调节范围的改变。一般情况下不对止挡段1421进行改变，避免影响止挡段1421和第二阀腔33底壁形成的封堵环的尺寸、进而影响阀芯14的移动效果。具体地，本实施例中，卡接凸起143设置在密封段141上，卡接凹槽设置在封堵段142上。
如图1所示，阀座组件的导向座20或阀芯14具有环形密封槽，电子膨胀阀还包括环形密封圈42，环形密封圈42设置在环形密封槽内并分别和阀芯14、导向座20密封配合。这样设置，便于导向座20和阀芯14的密封段141之间的密封配合，同时便于第一阀腔32和第二阀腔33的间隔。
其中，本实施例中的环形密封槽位于阀座组件的导向座20上，第二阀腔33朝向阀口腔34的一侧具有用于和止挡段1421止挡配合的止挡腔段331，环形密封圈42的内圈和阀芯14密封配合并形成密封环，环形密封圈42的内径为D1，阀芯14和止挡腔段331抵接形成的封堵环的径向尺寸为D2，1≤D2/D1≤1.05。这样设置，环形密封圈42内径即为密封环的径向尺寸，通过对D1和D2的限定，能够有效地抑制因差压而妨碍阀针组件10移动的情况。
如图1所示，电子膨胀阀还包括壳体50和驱动组件60，壳体50和阀座30连接，驱动组件60设置在壳体50内，驱动组件60朝向导向座20的一端和导向座20限位配合并和阀座30连接，阀针组件10顺次穿设在驱动组件60、导向座20和阀座30内。这样设置，通过驱动组件60实现对阀针组件10的驱动，以便于实现电子膨胀阀在开阀和关阀之间的转换。其中，本实施例中的电子膨胀阀的安装过程至少包括：先安装阀针组件10除阀芯14封堵段142以外的其他部分，之后将安装好的部分阀针组件10装配在导向座20中，之后在阀针组件10穿过导向座20的一端压装焊接封堵段142，之后再将连接好的阀针组件10与导向座20一起压装到阀座30内。
在本实施例中，电子膨胀阀还包括第一接管71和第二接管72，驱动组件60包括螺母组件61，第一接管71和第二阀腔33连通，第二接管72和阀口腔34连通，螺母组件61具有第一平衡孔和第二平衡孔，以连通第一阀腔32和螺母组件61内的腔体，第一接管71和第二阀腔33始终连通且压强为P1，第二接管72和阀口腔34连通且压强为P2，螺母组件61和阀针组件10围绕的腔体的压强为P3，P2和P3保持动态平衡，阀口腔34通过流通通道31、第一阀腔32、第一平衡孔、第二平衡孔与螺母组件61所在腔体连通，D3为P2所在腔体与P3所在腔体之间的连通通道的最小径向尺寸，在本实施例中，D3为螺母组件61上的第二平衡孔的径向尺寸(即连通壳体50内部腔体与螺母组件61内部腔体的平衡孔)，设定从第一接管71流向第二接管72的流动方式为正向流动，反之为反向流动。压力计算公式为F＝PS，正向流动时，F向下＝P3*[π*(D1/2)^2-π*(D3/2)^2]+P1*[π*(D2/2)^2-π*(D1/2)^2]，F向上＝P2*[π*(D2/2)^2-π*(D3/2)^2]，压差力计算公式如下：F向上＝P2*[π*(D2/2)^2-π*(D3/2)^2]-P3*[π*(D1/2)^2-π*(D3/2)^2]-P1*[π*(D2/2)^2-π*(D1/2)^2]，由于S和D成正比，故以下描述中用D替换公式中的S，公式可简化为，F向上＝P2(D2－D3)-P3(D1－D3)－P1(D2－D1)。在正向流动时，由于流体流动的情况下P1≠P2，P1＞P2，假设P2＝P3而且D1＝D2，得到F＝P1(D1－D2)+P2(D2－D1)，即压差力公式为F＝P1*π*[(D1－D2)/2]^2+P2*π*[(D2－D1)/2]^2，在D1＝D2的情况下，压差力F＝0，即阀针组件10移动过程中所受压差力理论上为0。在反向流动时，P2＞P1，以开阀为例，P2会瞬间泄压降低，导致该时的P2＜P3，若此时D1＝D2，则压差力F＝(P2－P3)(D1－D3)，F为负值，会产生压差，故对D1和D2的关系进行限定，以抵消上述存在的压差，限定范围为1≤D2/D1≤1.05。综上，对D1和D2的范围进行限定，有利于消除阀针组件10在移动过程中所受压差力，提高开关阀的流畅度。
具体地，阀针组件10还包括螺杆11、连接件12和弹性件13，螺杆11的一端和驱动组件60连接，螺杆11的另一端通过连接件12和阀芯14连接，连接件12可移动地设置在导向座20内并和导向座20的内壁限位配合，弹性件13的一端和阀芯14抵接，弹性件13的另一端与螺杆11和/或连接件12抵接。这样设置，便于驱动组件60对阀针组件10的驱动，同时通过导向座20实现对阀针组件10的容纳和导向，保证阀针组件10动作的可靠性。
如图5所示，本申请的实施例二提供了一种电子膨胀阀，与实施例一的不同之处在于，本实施例中的环形密封槽位于阀芯14上，此时，环形密封圈42的外圈与导向座20密封配合并形成密封环，环形密封圈42的外径为D1，阀芯14和止挡腔段331抵接形成的封堵环的径 向尺寸为D2，1≤D2/D1≤1.05。这样设置，环形密封圈42的外径即为密封环的径向尺寸，通过对D1和D2的限定，能够有效地抑制因差压而妨碍阀针组件10移动的情况。
如图6和图7所示，本申请的实施例三提供给了一种电子膨胀阀，与实施例二的不同之处在于，本实施例中的止挡腔段331为圆柱段，止挡段1421朝向阀口腔34的一侧具有用于和止挡腔段331止挡配合的环形止挡斜面，止挡腔段331与第二阀腔33底壁连接的环形边缘和环形止挡斜面止挡配合。这样设置，便于止挡腔段331的加工以及对封堵环的外扩和上调以及对封堵环位置的确定。与实施例二的另一个不同之处在于，本实施例中的阀芯14一体设置，保证了阀芯14的整体结构强度。
如图8所示，本申请的实施例四提供了一种电子膨胀阀，与实施例三的不同之处在于，本实施例中的环形密封槽位于导向座20上，此时，环形密封圈42的内圈与阀芯14密封配合并形成密封环，环形密封圈42的内径为D1，阀芯14和止挡腔段331抵接形成的封堵环的径向尺寸为D2，1≤D2/D1≤1.05。这样设置，通过对D1和D2的限定，能够有效地抑制因差压而妨碍阀针组件10移动的情况。
如图9所示，本申请的实施例五提供了一种电子膨胀阀，与实施例三的不同之处在于，本实施例中的止挡腔段331和阀口段341位于阀口座36上。这样设置，当产品因不同流量曲线要求有不同规格时，只需在保证形成的封堵环与密封环的对应的基础上更换阀口座36即可，便于提高电子膨胀阀的加工效率。
如图10所示，本申请的实施例六提供了一种电子膨胀阀，与实施例五的不同之处在于，导向座20与座体35为一体设置。这样设置，便于保证二者之间的同轴度，进而保证与其连接的壳体50、螺母组件61、阀口座36等零部件的同轴度，保证电子膨胀阀的可靠性。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (14)

  1. 一种电子膨胀阀，其特征在于，所述电子膨胀阀包括阀针组件(10)以及阀座组件，所述阀座组件具有相互连通的第二阀腔(33)和阀口腔(34)，所述阀针组件(10)包括阀芯(14)，所述阀芯(14)具有止挡段(1421)，所述阀针组件(10)可移动地穿设在所述阀座组件内，以调节流经所述阀口腔(34)的流体流量，所述止挡段(1421)和所述第二阀腔(33)的底壁止挡配合。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀座组件包括导向座(20)和阀座(30)，所述阀座(30)具有顺次连通且贯穿的第一阀腔(32)、所述第二阀腔(33)和所述阀口腔(34)，所述导向座(20)穿设在所述阀座(30)内并间隔所述第一阀腔(32)和所述第二阀腔(33)，所述阀针组件(10)和/或所述阀座(30)具有流通通道(31)，所述第一阀腔(32)和所述阀口腔(34)通过所述流通通道(31)连通，所述阀针组件(10)穿过所述导向座(20)并和所述导向座(20)的内壁密封配合。
  3. 根据权利要求1所述的电子膨胀阀，其特征在于，所述第二阀腔(33)和所述阀口腔(34)相对的一侧分别具有止挡腔段(331)和阀口段(341)，所述止挡腔段(331)和所述阀口段(341)连通，所述止挡腔段(331)的径向尺寸大于所述阀口段(341)的径向尺寸，所述止挡段(1421)和所述止挡腔段(331)与所述第二阀腔(33)底壁连接的环形边缘止挡配合。
  4. 根据权利要求3所述的电子膨胀阀，其特征在于，所述阀座组件包括导向座(20)和阀座(30)，所述阀座(30)包括座体(35)和阀口座(36)，所述座体(35)和所述阀口座(36)可拆卸地连接，所述导向座(20)穿设在所述座体(35)内，所述止挡腔段(331)和所述阀口段(341)位于所述阀口座(36)上，或，所述止挡腔段(331)和所述阀口段(341)位于所述座体(35)上。
  5. 根据权利要求4所述的电子膨胀阀，其特征在于，所述导向座(20)和所述座体(35)分体设置，所述导向座(20)和所述座体(35)限位配合，或，所述导向座(20)和所述座体(35)一体设置。
  6. 根据权利要求3所述的电子膨胀阀，其特征在于，所述止挡腔段(331)为圆台段，所述止挡腔段(331)的径向尺寸在所述止挡腔段(331)朝向所述阀口段(341)的方向上逐渐减小，所述止挡段(1421)朝向所述阀口腔(34)的一侧具有用于和所述止挡腔段(331)止挡配合的环形止挡斜面，所述环形止挡斜面与所述止挡腔段(331)的倾斜方向相同，所述环形止挡斜面与所述阀芯(14)轴线之间的夹角角度大于所述止挡腔段(331)与所述阀芯(14)轴线之间的夹角角度，所述止挡腔段(331)与所述第二阀腔(33)底壁连接的环形边缘和所述环形止挡斜面止挡配合。
  7. 根据权利要求3所述的电子膨胀阀，其特征在于，所述止挡腔段(331)为圆柱段，所述止挡段(1421)朝向所述阀口腔(34)的一侧具有用于和所述止挡腔段(331)止挡配合的环形止挡斜面，所述止挡腔段(331)与所述第二阀腔(33)底壁连接的环形边缘和所述环形止挡斜面止挡配合。
  8. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀芯(14)包括可拆卸连接的密封段(141)和封堵段(142)，所述密封段(141)和所述阀座组件的内壁密封配合，所 述封堵段(142)包括所述止挡段(1421)和与所述止挡段(1421)连接的流量调节段(1422)，所述止挡段(1421)的径向尺寸大于所述流量调节段(1422)的径向尺寸，所述流量调节段(1422)和所述阀口腔(34)限位配合。
  9. 根据权利要求8所述的电子膨胀阀，其特征在于，所述密封段(141)和所述封堵段(142)相互靠近的一侧分别具有卡接凸起(143)和卡接凹槽，所述卡接凸起(143)和所述卡接凹槽限位配合。
  10. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀座组件或所述阀芯(14)具有环形密封槽，所述电子膨胀阀还包括环形密封圈(42)，所述环形密封圈(42)设置在所述环形密封槽内并分别和所述阀芯(14)、所述阀座组件密封配合。
  11. 根据权利要求10所述的电子膨胀阀，其特征在于，所述第二阀腔(33)朝向所述阀口腔(34)的一侧具有用于和所述止挡段(1421)止挡配合的止挡腔段(331)，
    在所述阀座组件具有所述环形密封槽的情况下，所述环形密封圈(42)的内圈和所述阀芯(14)密封配合，所述环形密封圈(42)的内径为D1，所述阀芯(14)和所述止挡腔段(331)抵接形成的封堵环的径向尺寸为D2，1≤D2/D1≤1.05；
    或，在所述阀芯(14)具有所述环形密封槽的情况下，所述环形密封圈(42)的外圈与所述阀座组件密封配合，所述环形密封圈(42)的外径为D1，所述阀芯(14)和所述止挡腔段(331)抵接形成的封堵环的径向尺寸为D2，1≤D2/D1≤1.05。
  12. 根据权利要求2所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括壳体(50)和驱动组件(60)，所述壳体(50)和所述阀座(30)连接，所述驱动组件(60)设置在所述壳体(50)内，所述驱动组件(60)朝向所述导向座(20)的一端和所述导向座(20)限位配合并和所述阀座(30)连接，所述阀针组件(10)顺次穿设在所述驱动组件(60)、所述导向座(20)和所述阀座(30)内。
  13. 根据权利要求12所述的电子膨胀阀，其特征在于，所述阀针组件(10)还包括螺杆(11)、连接件(12)和弹性件(13)，所述螺杆(11)的一端和所述驱动组件(60)连接，所述螺杆(11)的另一端通过所述连接件(12)和所述阀芯(14)连接，所述连接件(12)可移动地设置在所述导向座(20)内并和所述导向座(20)的内壁限位配合，所述弹性件(13)的一端和所述阀芯(14)抵接，所述弹性件(13)的另一端与所述螺杆(11)和/或所述连接件(12)抵接。
  14. 一种组装方法，其特征在于，所述组装方法应用于权利要求2所述的电子膨胀阀的所述阀座组件，所述组装方法包括：
    准备多个所述阀座(30)，所述止挡段(1421)与多个所述第二阀腔(33)的底壁抵接形成的多个封堵环的径向尺寸相同，多个所述阀口腔(34)的径向尺寸不同；
    根据需求选取其中一个适配的所述阀座(30)与所述导向座(20)连接。
PCT/CN2024/097124 2023-06-06 2024-06-03 电子膨胀阀及组装方法 Ceased WO2024251090A1 (zh)

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CN205715985U (zh) * 2016-05-06 2016-11-23 浙江盾安禾田金属有限公司 一种电子膨胀阀
CN114278744A (zh) * 2020-09-18 2022-04-05 广东美的制冷设备有限公司 电子膨胀阀、冷媒循环管路及空调器系统
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CN220378999U (zh) * 2023-06-06 2024-01-23 浙江盾安人工环境股份有限公司 电子膨胀阀

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US6752377B1 (en) * 2003-01-24 2004-06-22 Taylor Innovations L.L.C. Pressure relief valve with selectable orifice size
CN205715985U (zh) * 2016-05-06 2016-11-23 浙江盾安禾田金属有限公司 一种电子膨胀阀
CN114278744A (zh) * 2020-09-18 2022-04-05 广东美的制冷设备有限公司 电子膨胀阀、冷媒循环管路及空调器系统
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CN220378999U (zh) * 2023-06-06 2024-01-23 浙江盾安人工环境股份有限公司 电子膨胀阀

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