WO2023142223A1 - Valve needle assembly, electronic expansion valve and refrigeration device - Google Patents

Valve needle assembly, electronic expansion valve and refrigeration device Download PDF

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Publication number
WO2023142223A1
WO2023142223A1 PCT/CN2022/079336 CN2022079336W WO2023142223A1 WO 2023142223 A1 WO2023142223 A1 WO 2023142223A1 CN 2022079336 W CN2022079336 W CN 2022079336W WO 2023142223 A1 WO2023142223 A1 WO 2023142223A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve needle
bearing
collar
needle assembly
Prior art date
Application number
PCT/CN2022/079336
Other languages
French (fr)
Chinese (zh)
Inventor
曾庆军
陈超
杨茂
Original Assignee
广东威灵电机制造有限公司
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 广东威灵电机制造有限公司 filed Critical 广东威灵电机制造有限公司
Publication of WO2023142223A1 publication Critical patent/WO2023142223A1/en

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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
    • 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
    • F16K1/38—Valve members of conical shape
    • 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
    • F16K1/02—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 with screw-spindle
    • 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
    • F16K1/48—Attaching valve members to screw-spindles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/48—Attaching valve members to screw-spindles
    • F16K1/487—Attaching valve members to screw-spindles by a fixing element extending in the axial direction of the spindle, e.g. a screw
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • 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
    • F16K1/50—Preventing rotation of 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/345—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by solenoids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present application relates to the field of electronic expansion valves, in particular to a valve needle assembly, electronic expansion valve and refrigeration equipment.
  • electronic expansion valves use the principle of stepping motors to drive the magnetic rotor to rotate through the coil, and convert the rotational motion of the magnetic rotor into the axial movement of the valve stem.
  • the valve stem drives the valve needle connected to it to rise or fall. Control the flow rate of the electronic expansion valve.
  • the electronic expansion valve mainly includes a rotor, a valve stem, a nut and a valve needle, wherein the valve stem is connected to the nut in rotation, the valve needle is arranged at the lower end of the valve stem, and the rotor drives the valve stem shaft. To move, and then drive the valve needle to move axially, so as to achieve the purpose of blocking and opening the valve port.
  • the valve needle will rotate relative to the valve port, resulting in wear of the valve needle and the valve port, thereby shortening the service life of the valve needle.
  • the main purpose of the present application is to propose a valve needle assembly, aiming at solving the technical problem in the prior art that the valve needle will rotate relative to the valve port and cause the valve needle to be easily worn.
  • a valve needle assembly applied to an electronic expansion valve including:
  • valve needle having opposite first and second ends, the first end being detachably mounted on a valve port of the electronic expansion valve
  • the bearing is arranged in the installation groove, and the two end surfaces of the outer ring of the bearing are limitedly abutted by the valve needle and the limiting collar respectively;
  • valve stem movably inserted in the inner ring of the bearing
  • One end of the elastic member is connected to the valve stem, and the other end is connected to the bearing.
  • the second end is provided with a mounting groove
  • the mounting groove provided at the second end has a first groove segment and a second groove segment distributed in the axial direction, and the inner diameter of the first groove segment greater than the inner diameter of the second slot section, and a limiting step is formed at the connection between the first slot section and the second slot section, and the limiting step abuts against the outer ring of the bearing. an end surface close to the first end.
  • the end surface of the limiting collar close to the first end is in limited abutment against the end surface of the outer ring of the bearing away from the first end, and the limiting collar is fixed The groove wall of the installation groove connected to the second end.
  • the limiting collar is inserted into the first slot segment.
  • the limiting collar is connected to the groove wall of the first groove segment by welding.
  • valve needle assembly further includes a driving collar fixedly sleeved on the end of the valve needle, and the driving collar is located on a side of the bearing close to the first end.
  • a positioning step is provided at the end of the valve needle, and the driving collar abuts against the positioning step.
  • the valve needle includes a connected needle body and a connecting portion, the first end is located at the needle body, the second end is located at the connecting portion, the needle body and the connecting portion part, or, the needle body and the connecting part are formed independently and fixedly connected.
  • the elastic member is configured as a spring, and a flange portion protrudes from the peripheral wall of the valve stem on the side of the bearing away from the first end, and the spring is sleeved on the valve a rod, and one end abuts against the flange part, and the other end naturally abuts against the end surface of the bearing.
  • the present application also proposes an electronic expansion valve, including:
  • the nut is provided with a mounting hole
  • valve stem of the valve needle assembly passes through the installation hole and is threadedly connected with the nut.
  • the present application also proposes a refrigeration device, including the aforementioned electronic expansion valve.
  • the outer ring of the bearing is limited by the valve needle and the limit collar on both axial sides of the bearing respectively, so that the bearing can be fixedly installed in the installation groove. Therefore, when the valve stem rotates in the circumferential direction and moves axially simultaneously to drive the valve needle, even if the inner ring of the bearing is driven to rotate with the valve stem, the outer ring of the bearing fixedly connected to the valve needle can also remain stationary in the circumferential direction. , the valve needle will not be driven to rotate in the circumferential direction.
  • the circumferential motion transmitted from the valve stem to the valve needle is offset, so that the valve needle only receives the axial movement transmitted by the valve stem without rotating relative to the valve port, which is beneficial to reduce The wear between the valve needle and the valve port ensures the reliability of the electronic expansion valve.
  • the valve stem drives the valve needle to move axially through the elastic member, and the valve needle can at least move axially relative to the bearing, so that when the valve needle touches the valve port, the valve stem can continue to move downward relative to the valve needle, thereby compressing Elastic member, so that the elastic member can provide pre-tightening force for the valve needle, so that the valve needle can be stably abutted against the valve port, and at the same time, it can also prevent the valve needle from excessively squeezing the valve port, which will cause a gap between the valve needle and the valve port. wear and tear.
  • FIG. 1 is a schematic structural view of an embodiment of the valve needle assembly of the present application
  • Figure 2 is a partial enlarged view at F in Figure 1;
  • Fig. 3 is a partial enlarged view of G in Fig. 1;
  • FIG. 4 is a schematic structural view of an embodiment of the electronic expansion valve of the present application.
  • Fig. 5 is a partial enlarged view of place A in Fig. 4;
  • Fig. 6 is a partial enlarged view of place B in Fig. 4;
  • Fig. 7 is a partial enlarged view of place C in Fig. 4;
  • Figure 8 is a partial enlarged view at D in Figure 4.
  • FIG. 9 is a partial enlarged view at E in FIG. 4 .
  • the directional indications are only used to explain the position in a certain posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly.
  • connection can be fixed connection, detachable connection, or integral connection; it can be directly connected or through an intermediate The medium is indirectly connected.
  • the present application proposes an electronic expansion valve.
  • the electronic expansion valve proposed in this application includes a valve housing 100 , a magnetic rotor 900 , a nut 200 , and a valve needle assembly.
  • the valve housing 100 includes an outer cover 101 and a valve seat 102 fixedly connected with the outer cover 101.
  • the outer cover 101 and the valve seat 102 enclose to form a valve cavity 103.
  • the magnetic rotor 900, the nut 200 and the valve needle assembly are all Set in the valve cavity 103, the magnetic rotor 900 can rotate relative to the valve housing 100, the nut 200 is fixedly connected to the valve seat 102, and the magnetic rotor 900 drives the movement of the valve needle assembly to control the electronic The flow rate of the expansion valve.
  • valve needle assembly The structure of the valve needle assembly will be introduced below.
  • the valve needle assembly includes: a valve needle 500, a limit collar 700, a bearing 600, a valve stem 300 and an elastic member 310.
  • the valve needle 500 has an opposite first end 501 and The second end 502, the first end 501 is used to be detachably installed on the valve port 104 of the electronic expansion valve; the limit collar 700 is fixedly connected to the second end 502, the second end 502 and at least one of the limiting collar 700 is provided with a mounting groove, the bearing 600 is arranged in the mounting groove, and the two ends of the outer ring of the bearing 600 are respectively covered by the valve needle 500 and the limiting collar.
  • the ring 700 abuts; the valve stem 300 is movably inserted into the inner ring of the bearing 600 after passing through the limiting collar 700; one end of the elastic member 310 is connected to the valve stem 300, and the other end is connected to the The bearing 600.
  • one of the limiting collar 700 and the second end 502 may be provided with a mounting groove for bearing installation, and the end face of the other one directly abuts against one end face of the outer ring of the bearing 600, and the mounting groove
  • a limiting structure should be formed inside to abut against the other end face of the outer ring of the bearing 600; it can also be that the limiting collar 700 and the second end 502 are respectively provided with installation grooves opposite to the notch, and the two installation grooves Both of them are provided with limiting structures for abutting against different end surfaces of the outer ring of the bearing 600 . In this way, the limiting abutment of the valve needle 500 and the limiting collar 700 on both end surfaces of the outer ring of the bearing 600 can be realized.
  • the nut 200 is provided with an installation hole 210 extending axially, the valve needle assembly passes through the installation hole 210 , and the valve stem 300 is threadedly connected with the nut 200 .
  • the end of the valve rod 300 away from the first open end is provided with a threaded rod section
  • the mounting hole 210 includes a threaded hole 211 section adapted to the threaded rod section, and the threaded rod section is connected to the threaded rod section.
  • the threaded hole 211 sections match.
  • the valve seat 102 is provided with a valve port 104 corresponding to the valve needle 500 , and the valve needle 500 is detachably installed in the valve port 104 .
  • the coil drives the magnetic rotor 900 to rotate
  • the magnetic rotor 900 drives the valve stem 300 to rotate.
  • the valve stem 300 can simultaneously perform circumferential rotation and axial movement, and the valve stem 300 drives The valve needle 500 moves axially upwards or axially downwards, thereby controlling the flow rate of the electronic expansion valve.
  • the outer ring of the bearing 600 is limited by the valve needle 500 and the limit collar 700 on both axial sides of the bearing 600 respectively, so that the bearing 600 can be fixedly installed in the installation groove. Therefore, when the valve stem 300 performs circumferential rotation and axial movement synchronously to drive the valve needle 500 to move, even if the inner ring of the bearing 600 is driven to rotate with the valve stem 300, the outer ring of the bearing 600 fixedly connected to the valve needle 500 will also Being able to keep still in the circumferential direction, the valve needle 500 will not be driven to rotate in the circumferential direction.
  • valve stem 300 drives the valve needle 500 to move axially through the elastic member 310, and the valve needle 500 can at least move axially relative to the bearing 600, so that when the valve needle 500 touches the valve port 104, the valve stem 300 can move relative to the valve port 104.
  • the needle 500 continues to move downward, thereby compressing the elastic member 310, so that the elastic member 310 can provide a pre-tightening force for the valve needle 500, so that the valve needle 500 can stably abut the valve port 104, and at the same time, the valve needle 500 can also be prevented from being excessively Extruding the valve port 104 causes wear between the valve needle 500 and the valve port 104 .
  • the end of the elastic member 310 is connected to the end surface of the inner ring of the bearing 600 away from the first end 501.
  • the end of the elastic member 310 is connected to the end of the valve stem 300 and the inner ring of the bearing 600.
  • the way of surface connection is abutment or scarfing.
  • the end of the elastic member 310 may directly contact the end surface of the valve stem 300 or the inner ring of the bearing 600 , or may indirectly contact the end surface of the valve stem 300 or the inner ring of the bearing 600 through other parts. Without loss of generality, as shown in FIG.
  • the elastic member 310 is set as a spring, the peripheral wall of the valve stem 300 is provided with a flange portion 320 , and the spring is sleeved on the valve stem 300 , and one end is abutted against the flange portion 320 , and the other end is abutted against the end surface of the bearing 600 , so as to realize their connection with the end surfaces of the valve stem 300 and the inner ring of the bearing 600 respectively.
  • the elastic member 310 can also be configured as an elastic piece, an elastic rubber sleeve or an elastic silicone sleeve.
  • the second end 502 is provided with the installation groove 530, and the installation groove 530 provided on the second end 502 has a first axial distribution.
  • a groove section and a second groove section the inner diameter of the first groove section is larger than the inner diameter of the second groove section, and a limited step 532 is formed at the connection between the first groove section and the second groove section , the limit step 532 is limited against the end surface of the outer ring of the bearing 600 that is close to the first end 501 .
  • the second groove section forms a relief space 531, and the end of the valve stem 300 can protrude from the relief space 531, so that the end of the valve stem 300 can move toward the relief space 531 to compress the spring , so as to provide pre-tightening force for the valve needle 500.
  • the end surface of the limiting collar 700 close to the first end 501 abuts against the outer ring of the bearing 600 away from the first end 501
  • the end surface of the second end 502 , and the limiting collar 700 is fixedly connected to the groove wall of the installation groove 530 of the second end 502 .
  • the limiting collar 700 is inserted into the first groove section, and is fixedly connected to the groove wall of the first groove section by welding.
  • the end face of the bearing 600 is flush with the end face of the first groove segment, and the limit collar 700 is fixed on the end face of the first groove segment, that is, it abuts against the outer surface of the bearing 600.
  • the limiting collar 700 can also be fixed to the installation groove 530 by clamping.
  • both the limit step 532 and the limit collar 700 should only be in contact with the end face of the outer ring of the bearing 600, so as to simultaneously limit the axial movement and the circumferential rotation of the outer ring of the bearing 600, and the inner ring of the bearing 600 The axial movement will also be restricted accordingly, but the circumferential rotation of the inner ring of the bearing 600 will not be affected, so as to ensure that the inner ring of the bearing 600 can be driven by the valve stem 300 to counteract the circumferential rotation of the valve stem 300 role.
  • the cooperation of the limit step 532 and the limit collar 700 can provide a large clamping force in the axial direction of the bearing 600, which can avoid friction between the outer surface of the bearing 600 and the groove wall of the installation groove 530, thereby Ensure that the bearing 600 can be stably installed in the installation groove 530 .
  • the limiting collar 700 includes a first guide segment 710 and a first connecting segment 720 distributed in the axial direction and connected, and the first connecting segment 720 is connected to the first
  • the groove walls of the groove sections are connected, and the outer diameter of the first guide section 710 gradually decreases from the end connected to the first connecting section 720 to the end away from the first connecting section 720 . In this way, under the guidance of the first guide section 710 , the limiting collar 700 can be inserted into the installation groove 530 with less effort.
  • the end surface of the first groove segment away from the second groove segment is provided with a guide structure, which can guide the limit collar 700 to be installed in the installation groove 530, and can also guide the bearing 600 to be installed in the installation groove 530.
  • the slot 530 is installed.
  • both ends of the first connecting section 720 are respectively connected with a first guiding section 710 . That is to say, both ends of the spacer collar 700 have guiding structures. When the spacer collar 700 is assembled, it is not necessary to distinguish the direction. A guide section 710 guides it. In this way, the production efficiency of the electronic expansion valve of the present application can be improved by performing a fool-proof design on the limit collar 700 .
  • the valve needle assembly further includes a driving collar 800 fixedly sleeved on the end of the valve needle 500, and the driving collar 800 is located near the bearing 600.
  • the limit collar 700 is driven by the bearing 600 to move axially upward, and the bearing 600 will also move upward when it is thrust. movement, the valve needle 500 fixedly connected with the bearing 600 will also move upward accordingly.
  • the periphery of the end of the valve stem 300 is provided with a driving convex portion, so that when the valve stem 300 moves upward and axially, the driving convex portion pushes against the end surface of the bearing 600, which can also Drive the valve needle 500 to move upward.
  • the end of the valve needle 500 is provided with a positioning step 330 , and the driving collar 800 abuts against the positioning step 330 .
  • the positioning step 330 can play a positioning role.
  • the end surface of the driving collar 800 abuts against the positioning step 330, it means that the driving collar 800 is installed in place.
  • a positioning step 330 may also be provided inside the driving collar 800 , and when the end of the valve stem 300 abuts against the positioning step 330 , it means that the driving collar 800 is installed in place.
  • the driving collar 800 includes a second guide section 820 and a second connecting section 810 distributed in the axial direction, and the valve stem 300 is interference-fitted with the second connecting section 810 , the second guiding section 820 is located on the side of the second connecting section 810 close to the bearing 600 , and the inner diameter of the second guiding section 820 faces away from the end close to the second connecting section 810 One end of the second connection section 810 gradually increases.
  • the second guide section 820 can play a guiding role during the assembly process of the valve stem 300 and the driving collar 800 , so that the operation of inserting the valve stem 300 into the driving collar 800 can save labor and be faster.
  • the driving collar 800 also includes a transition section 830 located on the side of the second connecting section 810 close to the bearing 600 , and the driving collar 800 has two sections.
  • the second guide section 820, the transition section 830 is connected to the end surface of the driving collar 800 through a second guide section 820, and connected to the second connecting section through another second guide section 820 810. That is, between the end close to the bearing 600 and the end away from the bearing 600 of the driving collar 800, there are a second guide section 820, a transition section 830, a second guide section 820 and a second connecting section 810 connected in sequence, wherein ,
  • the transition section 830 is clearance fit with the valve stem 300 .
  • valve stem 300 When assembling the drive collar 800, the valve stem 300 should be inserted from the end of the drive collar 800 close to the bearing 600, so that the end of the valve stem 300 will first contact the second guide of this end of the drive collar 800.
  • the position where the inner diameter of section 820 is the largest can facilitate the alignment and snap-in of the end of the valve stem 300.
  • the end of the valve stem 300 can be inserted into the transition section 830 with less effort, and then pass through the transition section 830 reaches another second guide section 820, the second guide section 820 is used to guide the valve stem 300 to be inserted into the second connecting section 810, because the second connecting section 810 is interference fit with the valve stem 300, so the valve stem 300
  • the assembly of the driving collar 800 and the valve rod 300 can be realized more labor-saving and faster, which is beneficial to improving the production efficiency of the electronic expansion valve.
  • a guide collar 400 is installed in the valve cavity 103, and the guide collar 400 is located on the side of the nut 200 close to the valve port 104;
  • the valve needle 500 passes through the guide collar 400 and is inserted into the valve port 104.
  • the valve needle 500 is guided by the guide collar 400 along the axis. Move toward the valve port 104 to open or close the valve port 104 .
  • the guide collar 400 is arranged coaxially with the valve port 104 .
  • the concentricity between the valve needle 500 and the valve port 104 can be improved through the restriction of the guide collar 400 on the valve needle 500; on the other hand, when the valve stem 300 drives the valve needle 500 to move, the guide collar 400 can The axial movement of the valve needle 500 acts as a guide to ensure the smooth movement of the valve needle 500 . In this way, the valve needle 500 can maintain a high degree of coaxiality with the valve port 104 in both the static state and the moving state, which is beneficial to ensure the accuracy of the opening degree control of the valve port 104, thereby ensuring the reliability of the electronic expansion valve.
  • valve needle 500 will not move unnecessary relative to the valve port 104, thereby reducing the wear between the valve needle 500 and the valve port 104, which is beneficial to prolong the valve needle.
  • the service life of the components to further ensure the reliability of the electronic expansion valve.
  • the valve needle 500 includes a connected needle body 510 and a connecting portion 520, and the needle body 510 passes through the guide collar 400 Inserted in the valve port 104 , the connecting portion 520 has a portion located in the lumen of the nut 200 .
  • the nut 200 is provided with a first guide hole 212, the connecting part 520 is inserted into the first guide hole 212, and has a part located in the inner cavity of the nut 200, and the nut 200 is the shaft of the connecting part 520 through the first guide hole 212.
  • Guidance is provided for movement; the guide collar 400 is provided with a second guide hole 401 for the needle body 510 to pass through, so as to guide its axial movement. It can be understood that both the first guide hole 212 and the second guide hole 401 are coaxial with the valve port 104, because the first guide hole 212 of the nut 200 and the second guide hole 401 of the guide collar 400 have a dual limiting effect and guide Function, the coaxiality of the valve needle 500 and the valve port 104 is high, which is conducive to ensuring the accuracy of the opening control of the valve port 104, thereby ensuring the reliability of the electronic expansion valve.
  • the depth of the second guide hole 401 is greater than or equal to 1mm, so as to meet the maximum axial movement process of the needle body 510, so that the second guide hole 401 can provide guidance during the axial movement of the needle body 510. effect.
  • the needle body 510 and the connecting portion 520 can be integrally formed to improve the production and processing efficiency of the valve needle 500; or, the needle body 510 and the connecting portion 520 can be formed independently The final connection is fixed to simplify the structure of the mold and ensure the yield of the finished product.
  • the guide collar 400 is further provided with a first relief hole 402 that is axially distributed and communicated with the second guide hole 401 , and the connecting portion 520 is connected with the second guide hole 401 .
  • One end connected to the needle body 510 protrudes from the inner cavity of the nut 200 and is accommodated in the first relief hole 402 .
  • the guide collar 400 is also provided with a second relief hole 403, the second relief hole 403 communicates with the end of the first relief hole 402 away from the second guide hole 401, The nut 200 is partially accommodated in the second relief hole 403 .
  • the second guide hole 401 of the guide collar 400 needs to guide and fit the valve needle 500, and the position of the valve needle 500 is close to the valve port 104. If the guide collar 400 is connected to the valve housing through the outer wall of the second guide hole 401 100, it is easy to affect the flow of refrigerant near the valve port 104.
  • the first relief hole 402 of the avoidance connection part 520 and the second relief hole 403 of the avoidance nut 200 are sequentially provided on the side of the second guide hole 401 away from the valve port 104, whereby the guide collar 400 is fixedly connected to the valve housing 100 through the outer wall of the first relief hole 402 or the outer wall of the second relief hole 403 , that is, the connection structure between the guide collar 400 and the valve housing 100 has adverse effects on the flow of refrigerant.
  • the outer wall of the guide collar 400 is protruded with a mounting step 410 , and the inner wall of the valve housing 100 is correspondingly provided with a stepped space 110 , the installation step 410 is engaged with the step space 110 .
  • the installation step 410 is formed on the outer wall opposite the first relief hole 402 and the second relief hole 403, and the installation step 410 is engaged with the step space 110, so that the guide collar 400 can be fixedly installed on the valve housing 100 .
  • the step space 110 is jointly formed by a connected first step surface 111 and a second step surface 112 , and the installation step 410 includes an abutment on the first step surface 111
  • the third stepped surface 411 and the fourth stepped surface 412 abutting against the second stepped surface 112
  • the first stepped surface 111 is arranged parallel to the axial direction of the guide collar 400 .
  • at least one of the end of the first stepped surface 111 away from the second stepped surface 112 and the end of the third stepped surface 411 close to the fourth stepped surface 412 is provided with a guide structure for assembling the guide collar 400 on the valve.
  • the casing 100 guides the installation step 410 to snap into the step space 110 .
  • a first guide surface 113 is provided on the side of the first stepped surface 111 away from the second stepped surface 112 , and the first guide surface 113 is The direction away from the first stepped surface 111 is gradually set away from the third stepped surface 411 .
  • one end of the third stepped surface 411 close to the fourth stepped surface 412 is provided with two second guide surfaces 413 , and the second guide surfaces 413 are in a direction away from the fourth stepped surface 412 Set gradually close to the first step surface 111, a transition surface 414 is provided between the two second guide surfaces 413, the transition surface 414 is parallel to the axial direction of the guide collar 400, the transition surface 414 is connected to the third step surface 411 through a second guide surface 413 and connected to the fourth step surface 412 through another guide surface.
  • the first guiding surface 113 and the second guiding surface 413 can be arranged in parallel, that is, arranged in parallel or approximately parallel.
  • the second guide surface 413 closer to the fourth step surface 412 first enters the space inside the first guide surface 113, and then gradually snaps into the step with the installation step 410.
  • the space 110, the transition surface 414, another guide surface, and the third step surface 411 enter the space inside the first guide surface 113 successively, and at least one of the first guide surface 113 and the second guide surface 413 can play a role in this process.
  • the side wall of the valve housing 100 is provided with a refrigerant passage 105
  • the guide collar 400 is provided with a flow guide relative to the refrigerant passage 105 Conical surface 420.
  • the conical guide surface 420 can guide the flow of the refrigerant, avoiding the disorder of the refrigerant flow and affecting the performance of the electronic expansion valve.
  • the valve cavity 103 includes a first valve cavity 1031 and a second valve cavity 1032 respectively located on both axial sides of the guide collar 400 , and the guide collar 400 or
  • the valve housing 100 is provided with a balancing channel for communicating the first valve cavity 1031 and the second valve cavity 1032 . Due to the setting of the balance channel, the air pressure in the first valve chamber 1031 and the second valve chamber 1032 can be balanced, which is beneficial to ensure the stability of the internal pressure of the electronic expansion valve, and can reduce the movement resistance of the valve needle 500, thereby ensuring the stability of the electronic expansion valve. work performance.
  • At least one of the first stepped surface 111 and the third stepped surface 411 is recessed with a first air passage groove, and the second stepped surface 112 and the fourth stepped surface 412 At least one of them is recessed with a second air passage connected to the first air passage, so as to form the balance passage in the first air passage and the second air passage.
  • the first stepped surface 111, the second stepped surface 112, the third stepped surface 411 and the fourth stepped surface 412 are all arranged in a ring shape, so that the installation step 410 and the stepped space 110 all correspond to Ring-shaped, the first stepped surface 111 and the third stepped surface 411 not only have abutting parts, but also have a concave part to form the first air passage groove.
  • the second stepped surface 112 and the fourth stepped surface 412 have both The abutting part also has a part that is recessed to form the second gas passage groove.
  • the first valve chamber 1031 is located on the side of the guide collar 400 away from the valve port 104, and the two ends of the first air passage groove are respectively connected to the first valve chamber 1031 and one end of the second air passage groove.
  • the other end of the second air passage tank is connected to the second valve cavity 1032, so that the communication between the first valve cavity 1031 and the second valve cavity 1032 can be realized, which is beneficial to ensure the stability of the internal pressure of the electronic expansion valve, thereby ensuring the electronic expansion The working stability of the valve.
  • the outer wall of the guide collar 400 is further provided with a connection surface 430, and the installation step 410 is connected to the flow guide cone surface 420 through the connection surface 430, the The connection surface 430 defines an air passage hole 440 penetrating through the inner wall of the guide collar 400 to form the balance passage in the air passage hole 440 .
  • the connection surface 430 is set relative to the first relief hole 402, and the air passage hole 440 penetrates from the connection surface 430 to the inside of the first relief hole 402. wall. In this way, the first valve cavity 1031 can communicate with the first relief hole 402 through the air passage hole 440 .
  • first relief hole 402 is an avoidance connection part 520, and there is a larger gap between it and the connection part 520, while the second relief hole 403 is an avoidance nut 200, and there is a larger gap between it and the nut 200. Therefore, the spaces in the first relief hole 402 and the second relief hole 403 belong to the space of the second valve cavity 1032 .
  • the first valve chamber 1031 communicates with the first relief hole 402 , that is, communicates with the second valve chamber 1032 , so as to ensure the stability of the internal pressure of the electronic expansion valve, thereby guaranteeing the working stability of the electronic expansion valve.
  • the gap fit between the needle body 510 and the guide collar 400 and between the needle body 510 and the valve port 104 are all clearance fit, and the connecting part 520 and the inner wall of the nut 200 are provided with a gap, and the fitting gap between the connecting part 520 and the nut 200 is greater than the minimum fitting gap between the needle body 510 and the inner wall of the valve port 104, Moreover, the matching gap between the needle body 510 and the guide collar 400 is greater than the minimum matching gap between the needle body 510 and the inner wall of the valve port 104 .
  • the fit gap between the connecting portion 520 and the nut 200 is the gap between the outer wall of the connecting portion 520 and the inner wall of the first guide hole 212 (ie, D3 in FIG. 7 ).
  • the needle body 510 has a main body section 511 and a tip 512 distributed along the axial direction, the main body section 511 is passed through the second guide hole 401, and is in clearance fit with the second guide hole 401, the cooperation between the needle body 510 and the guide collar 400
  • the gap is the gap between the outer wall surface of the main body section 511 and the inner wall surface of the second guide (that is, D2 in Figure 6); the tip 512 is the first end 501 for inserting the valve port 104, and the tip 512 is in the After being inserted into the valve port 104, it fits with the inner wall surface of the valve port 104.
  • the minimum fit gap between the needle body 510 and the inner wall surface of the valve port 104 is the minimum fit gap between the tip 512 and the inner wall surface of the valve port 104 (i.e. D1 in Figure 5).
  • the minimum fit clearance due to the existence of the minimum fit clearance, when the valve needle 500 closes the valve port 104, there is a certain gap between the outer wall surface of the tip 512 and the inner wall surface of the valve port 104, which can reduce the distance between the valve needle 500 and the valve port 104. The friction between them prevents the valve needle 500 from being stuck.
  • the main body section 511 of the needle body 510 and the second guide hole The matching gap of 401 is greater than the minimum fitting gap between the tip 512 and the inner wall of the valve port 104, so that there is enough movable space between the main body section 511 and the inner wall of the second guide hole 401, and the main body section 511 is driven to be opposite to each other.
  • the second guide hole 401 is inclined, and will not be stuck with the second guide hole 401, but still maintains a certain gap with the inner wall of the second guide hole 401, which will not affect the up and down movement of the needle body 510, and Since the gap between the outer wall surface of the connecting portion 520 and the inner wall surface of the nut 200 is greater than the minimum fitting gap between the tip 512 and the inner wall surface of the valve port 104, there is also a gap between the connecting portion 520 and the first guide hole 212 of the nut 200.
  • valve needle 500 can still move smoothly in the up and down direction, thus effectively preventing the valve needle 500 from being stuck, and at the same time avoiding the eccentric alignment of the valve needle caused by the deviation of the coaxiality during the assembly process of the valve needle assembly. 500 impact.
  • the fitting gap between the connecting portion 520 and the nut 200 is greater than the fitting gap between the needle body 510 and the guide collar 400 , that is, the fitting gap of the connecting portion 520
  • the gap D3 between the outer wall surface and the inner wall surface of the first guide hole 212 is larger than the gap D2 between the outer wall surface of the main body section 511 and the inner wall surface of the second guide hole 401 . It can be understood that when the valve port 104 is opened, the tip 512 of the needle body 510 breaks away from the valve port 104.
  • the nut 200 is provided with a threaded hole 211 communicating with the first guide hole 212 , and the threaded hole 211 is located at the end of the first guide hole 212 .
  • one end of the valve stem 300 is drivingly connected to the connecting portion 520 , and the other end of the valve stem 300 is threadedly connected to the threaded hole 211 , so that the coil drives the magnetic rotor 900 Rotate, the magnetic rotor 900 drives the valve stem 300 to rotate, and through the threaded cooperation with the nut 200, the valve stem 300 can simultaneously perform circumferential rotation and axial movement, and the valve stem 300 drives the valve needle 500 to move axially upward or downward Movement, thereby controlling the flow rate of the electronic expansion valve.
  • the threaded section of the valve stem 300 fits with the threaded hole 211 in a clearance, so that the valve stem 300 can have a certain movement deviation in the radial direction relative to the nut 200, so that the valve stem 300 and the nut 200 can further absorb the concentric deviation to improve the overall coaxial movement. Spend.
  • the fit gap between the valve stem 300 and the threaded hole 211 is larger than the fit gap (ie D3 ) between the connecting portion 520 and the first guide hole 212 .
  • the valve stem 300 is coaxially matched with the valve needle 500 , and when the connecting portion 520 is inclined relative to the first guide hole 212 , due to the minimum fitting clearance between the valve stem 300 and the nut 200 , the threaded section of the valve stem 300 and the threaded hole 211 Between, this gap value is greater than the matching gap between the connecting part 520 and the first guide hole 212, thus, there is enough space for movement between the valve stem 300 and the threaded section and the threaded hole 211, even if the valve stem 300 is driven to move against the nut 200 is tilted, the threaded section of the valve stem 300 will not be stuck with the threaded hole 211 of the nut 200, and will not affect the up and down movement of the valve needle assembly of the electronic expansion valve.
  • the present application also proposes a refrigeration device, which includes an electronic expansion valve.
  • a refrigeration device which includes an electronic expansion valve.
  • the electronic expansion valve For the specific structure of the electronic expansion valve, refer to the above-mentioned embodiments. Since this refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it has at least the above-mentioned embodiments. All the beneficial effects brought by the technical solution will not be repeated here.
  • the refrigeration equipment may be an air conditioner, a freezer, a refrigerator, a heat pump water heater, and the like.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Lift Valve (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

A valve needle assembly, an electronic expansion valve and a refrigeration device. The valve needle assembly comprises a valve needle (500), a limiting sleeve ring (700), a bearing (600), a valve rod (300) and an elastic member (310). The valve needle (500) is provided with a first end (501) and a second end (502) opposite to each other. The first end (501) is detachably mounted on a valve port (104) of the electronic expansion valve, the limiting sleeve ring (700) is fixedly connected to the second end (502), and at least one of the second end (502) and the limiting sleeve ring (700) is provided with a mounting groove. The bearing (600) is provided in the mounting groove, and two end faces of an outer ring of the bearing (600) are limited and abutted by the valve needle (500) and the limiting sleeve ring (700), respectively. The valve rod (300) is movably inserted into an inner ring of the bearing (600) after passing through the limiting sleeve ring (700). One end of the elastic member (310) is connected to the valve rod (300), and the other end is connected to the bearing (600).

Description

阀针组件、电子膨胀阀和制冷设备Valve pin assemblies, electronic expansion valves and refrigeration equipment
本申请要求于2022年1月26日申请的、申请号为202210093242.4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。This application claims the priority of the Chinese patent application with application number 202210093242.4 filed on January 26, 2022, the entire contents of which are incorporated in this application by reference.
技术领域technical field
本申请涉及电子膨胀阀领域，特别涉及一种阀针组件、电子膨胀阀和制冷设备。The present application relates to the field of electronic expansion valves, in particular to a valve needle assembly, electronic expansion valve and refrigeration equipment.
背景技术Background technique
目前，电子膨胀阀是利用步进电机的原理，通过线圈驱动磁转子转动，并将磁转子的旋转运动转化为阀杆的轴向运动，由阀杆带动与之连接的阀针上升或下降，控制电子膨胀阀的流量大小。At present, electronic expansion valves use the principle of stepping motors to drive the magnetic rotor to rotate through the coil, and convert the rotational motion of the magnetic rotor into the axial movement of the valve stem. The valve stem drives the valve needle connected to it to rise or fall. Control the flow rate of the electronic expansion valve.
相关技术中，电子膨胀阀主要包括转子、阀杆、螺母及阀针，其中，所述阀杆与螺母转动连接，所述阀针设于所述阀杆的下端，所述转子带动阀杆轴向移动，进而带动所述阀针进行轴向移动，以实现封堵、打开所述阀口的目的。但采用上述结构，在封堵和打开所述阀口时，所述阀针会相对所述阀口发生转动，导致阀针和阀口发生磨损，从而缩短了阀针的使用寿命。In the related art, the electronic expansion valve mainly includes a rotor, a valve stem, a nut and a valve needle, wherein the valve stem is connected to the nut in rotation, the valve needle is arranged at the lower end of the valve stem, and the rotor drives the valve stem shaft. To move, and then drive the valve needle to move axially, so as to achieve the purpose of blocking and opening the valve port. However, with the above structure, when the valve port is blocked and opened, the valve needle will rotate relative to the valve port, resulting in wear of the valve needle and the valve port, thereby shortening the service life of the valve needle.
上述内容仅用于辅助理解发明的技术方案，并不代表承认上述内容是现有技术。The above content is only used to assist in understanding the technical solution of the invention, and does not mean that the above content is admitted as prior art.
技术问题technical problem
本申请的主要目的是提出一种阀针组件，旨在解决现有技术中阀针会相对阀口发生转动导致阀针容易发生磨损的技术问题。The main purpose of the present application is to propose a valve needle assembly, aiming at solving the technical problem in the prior art that the valve needle will rotate relative to the valve port and cause the valve needle to be easily worn.
技术解决方案technical solution
为实现上述目的，本申请提出一种应用于电子膨胀阀的阀针组件，包括：In order to achieve the above purpose, the present application proposes a valve needle assembly applied to an electronic expansion valve, including:
阀针，具有相对的第一端和第二端，所述第一端用于可分离地安装于所述电子膨胀阀的阀口；a valve needle having opposite first and second ends, the first end being detachably mounted on a valve port of the electronic expansion valve;
限位套环，固定连接于所述第二端，所述第二端和所述限位套环中的至少一者设置有安装槽；A limiting collar fixedly connected to the second end, at least one of the second end and the limiting collar is provided with a mounting groove;
轴承，设于所述安装槽内，所述轴承的外圈的两端面分别被所述阀针和所述限位套环限位抵接；The bearing is arranged in the installation groove, and the two end surfaces of the outer ring of the bearing are limitedly abutted by the valve needle and the limiting collar respectively;
阀杆，活动插设于所述轴承的内圈；以及a valve stem movably inserted in the inner ring of the bearing; and
弹性件，一端连接于所述阀杆，另一端连接于所述轴承。One end of the elastic member is connected to the valve stem, and the other end is connected to the bearing.
在一实施例中，所述第二端设置有安装槽，设于所述第二端的安装槽具有在轴向上分布的第一槽段和第二槽段，所述第一槽段的内径大于所述第二槽段的内径，而在所述第一槽段和所述第二槽段的连通处形成有限位台阶，所述限位台阶限位抵接于所述轴承的外圈的靠近所述第一端的端面。In one embodiment, the second end is provided with a mounting groove, and the mounting groove provided at the second end has a first groove segment and a second groove segment distributed in the axial direction, and the inner diameter of the first groove segment greater than the inner diameter of the second slot section, and a limiting step is formed at the connection between the first slot section and the second slot section, and the limiting step abuts against the outer ring of the bearing. an end surface close to the first end.
在一实施例中，所述限位套环的靠近所述第一端的端面限位抵接于所述轴承的外圈的远离所述第一端的端面，且所述限位套环固定连接于所述第二端的安装槽的槽壁。In one embodiment, the end surface of the limiting collar close to the first end is in limited abutment against the end surface of the outer ring of the bearing away from the first end, and the limiting collar is fixed The groove wall of the installation groove connected to the second end.
在一实施例中，所述限位套环插设于所述第一槽段。In one embodiment, the limiting collar is inserted into the first slot segment.
在一实施例中，所述限位套环通过焊接的方式与所述第一槽段的槽壁相连接。In one embodiment, the limiting collar is connected to the groove wall of the first groove segment by welding.
在一实施例中，所述阀针组件还包括固定套设于所述阀针的末端的驱动套环，所述驱动套环位于所述轴承的靠近所述第一端的一侧。In one embodiment, the valve needle assembly further includes a driving collar fixedly sleeved on the end of the valve needle, and the driving collar is located on a side of the bearing close to the first end.
在一实施例中，所述阀针的末端设有定位台阶，所述驱动套环抵接于所述定位台阶。In one embodiment, a positioning step is provided at the end of the valve needle, and the driving collar abuts against the positioning step.
在一实施例中，所述阀针包括相连接的针本体和连接部，所述第一端位于所述针本体，所述第二端位于所述连接部，所述针本体和所述连接部一体成型，或，所述针本体和所述连接部分别独立成型后固定连接。In one embodiment, the valve needle includes a connected needle body and a connecting portion, the first end is located at the needle body, the second end is located at the connecting portion, the needle body and the connecting portion part, or, the needle body and the connecting part are formed independently and fixedly connected.
在一实施例中，所述弹性件设置为弹簧，所述阀杆的周壁在所述轴承的远离所述第一端的一侧凸设有凸缘部，所述弹簧套设于所述阀杆，且一端抵接于所述凸缘部，另一端自然抵接于所述轴承的端面。In one embodiment, the elastic member is configured as a spring, and a flange portion protrudes from the peripheral wall of the valve stem on the side of the bearing away from the first end, and the spring is sleeved on the valve a rod, and one end abuts against the flange part, and the other end naturally abuts against the end surface of the bearing.
本申请还提出一种电子膨胀阀，包括：The present application also proposes an electronic expansion valve, including:
螺母，所述螺母开设有安装孔；a nut, the nut is provided with a mounting hole;
前述的阀针组件，所述阀针组件的阀杆穿设于所述安装孔并与所述螺母螺纹连接。In the aforementioned valve needle assembly, the valve stem of the valve needle assembly passes through the installation hole and is threadedly connected with the nut.
本申请还提出一种制冷设备，包括前述的电子膨胀阀。The present application also proposes a refrigeration device, including the aforementioned electronic expansion valve.
有益效果Beneficial effect
本申请技术方案中，分别通过阀针和限位套环在轴承的轴向两侧对轴承外圈进行限位，即可使轴承固定安装于安装槽内。由此，在阀杆同步进行周向转动和轴向运动，以驱动阀针运动时，即使轴承内圈被带动随阀杆转动，与阀针固定连接的轴承外圈也能在周向上保持静止，阀针也就不会被带动而发生周向转动。本申请中，通过使阀杆与轴承配合，抵消了阀杆向阀针传递的周向运动，使得阀针只接收阀杆传递的轴向运动，而不会相对阀口转动，有利于减小阀针与阀口之间的磨损，从而保障电子膨胀阀的工作可靠性。具体地，阀杆通过弹性件驱动阀针轴向移动，且阀针至少可相对轴承轴向移动，如此，当阀针抵于阀口后，阀杆能够相对阀针继续向下运动，从而压缩弹性件，以使弹性件能够为阀针提供预紧力，从而使阀针能够稳定地抵于阀口，同时还可以避免阀针过度挤压阀口，而造成阀针与阀口之间的磨损。In the technical solution of the present application, the outer ring of the bearing is limited by the valve needle and the limit collar on both axial sides of the bearing respectively, so that the bearing can be fixedly installed in the installation groove. Therefore, when the valve stem rotates in the circumferential direction and moves axially simultaneously to drive the valve needle, even if the inner ring of the bearing is driven to rotate with the valve stem, the outer ring of the bearing fixedly connected to the valve needle can also remain stationary in the circumferential direction. , the valve needle will not be driven to rotate in the circumferential direction. In this application, by cooperating the valve stem with the bearing, the circumferential motion transmitted from the valve stem to the valve needle is offset, so that the valve needle only receives the axial movement transmitted by the valve stem without rotating relative to the valve port, which is beneficial to reduce The wear between the valve needle and the valve port ensures the reliability of the electronic expansion valve. Specifically, the valve stem drives the valve needle to move axially through the elastic member, and the valve needle can at least move axially relative to the bearing, so that when the valve needle touches the valve port, the valve stem can continue to move downward relative to the valve needle, thereby compressing Elastic member, so that the elastic member can provide pre-tightening force for the valve needle, so that the valve needle can be stably abutted against the valve port, and at the same time, it can also prevent the valve needle from excessively squeezing the valve port, which will cause a gap between the valve needle and the valve port. wear and tear.
附图说明Description of drawings
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative effort.
图1为本申请阀针组件一实施例的结构示意图；FIG. 1 is a schematic structural view of an embodiment of the valve needle assembly of the present application;
图2为图1中F处的局部放大图；Figure 2 is a partial enlarged view at F in Figure 1;
图3为图1中G处的局部放大图；Fig. 3 is a partial enlarged view of G in Fig. 1;
图4为本申请电子膨胀阀一实施例的结构示意图；4 is a schematic structural view of an embodiment of the electronic expansion valve of the present application;
图5为图4中A处的局部放大图；Fig. 5 is a partial enlarged view of place A in Fig. 4;
图6为图4中B处的局部放大图；Fig. 6 is a partial enlarged view of place B in Fig. 4;
图7为图4中C处的局部放大图；Fig. 7 is a partial enlarged view of place C in Fig. 4;
图8为图4中D处的局部放大图；Figure 8 is a partial enlarged view at D in Figure 4;
图9为图4中E处的局部放大图。FIG. 9 is a partial enlarged view at E in FIG. 4 .
附图标号说明：Explanation of reference numbers:
标号 label 名称 name 标号 label 名称 name
100 100 阀壳体 valve housing 400 400 导向套环 Guide collar
101 101 外罩 cover 401 401 第二导向孔 Second guide hole
102 102 阀座 seat 402 402 第一让位孔 first give way hole
103 103 阀腔 Cavity 403 403 第二让位孔 second give way hole
1031 1031 第一阀腔 first valve cavity 410 410 安装台阶 installation steps
1032 1032 第二阀腔 second valve chamber 411 411 第三台阶面 third step surface
104 104 阀口 valve port 412 412 第四台阶面 fourth step surface
105 105 冷媒过口 Refrigerant pass 413 413 第二导向面 second guide surface
110 110 台阶空间 step space 414 414 过渡面 transition surface
111 111 第一台阶面 first step surface 420 420 导流锥面 diversion cone
112 112 第二台阶面 second step surface 430 430 连接面 connection surface
113 113 第一导向面 first guide surface 440 440 过气孔 Air hole
200 200 螺母 nut 500 500 阀针 needle
210 210 安装孔 Mounting holes 501 501 第一端 first end
211 211 螺纹孔 Threaded hole 502 502 第二端 second end
212 212 第一导向孔 first guide hole 510 510 针本体 needle body
300 300 阀杆 Stem 511 511 主体段 main body
310 310 弹性件 Elastic 512 512 尖端 cutting edge
320 320 凸缘部 Flange 520 520 连接部 Connection
330 330 定位台阶 positioning steps 530 530 安装槽 mounting slot
600 600 轴承 bearing 531 531 让位空间 make room
800 800 驱动套环 drive collar 532 532 限位台阶 Limiting steps
810 810 第二连接段 second link 700 700 限位套环 Limiting collar
820 820 第二导向段 second guide section 710 710 第一导向段 first guide segment
830 830 过渡段 Transition 720 720 第一连接段 first link
900 900 磁转子 magnetic rotor   the   the
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The realization, functional features and advantages of the present application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.
本发明的实施方式Embodiments of the present invention
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的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有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。The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
需要说明，若本申请实施例中有涉及方向性指示（诸如上、下、左、右、前、后……），则该方向性指示仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiment of the present application, the directional indications are only used to explain the position in a certain posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly.
术语“连接”、“安装”、“固定”等均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。The terms "connection", "installation" and "fixation" should be understood in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; it can be directly connected or through an intermediate The medium is indirectly connected. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
另外，若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，若全文中出现的“和/或”的含义为，包括三个并列的方案，以“A和/或B”为例，包括A方案，或B方案，或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be interpreted as indications or hints Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, if the meaning of "and/or" appearing in the whole text includes three parallel schemes, taking "A and/or B" as an example, it includes scheme A, scheme B, or schemes in which both A and B are satisfied . In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present application.
本申请提出一种电子膨胀阀。The present application proposes an electronic expansion valve.
请参阅图4，本申请提出的电子膨胀阀包括阀壳体100、磁转子900、螺母200、及阀针组件。所述阀壳体100包括外罩101、与外罩101固定连接的阀座102，所述外罩101与所述阀座102围合形成阀腔103，所述磁转子900、螺母200、阀针组件均设于所述阀腔103内，所述磁转子900可相对阀壳体100转动，所述螺母200固定连接所述阀座102，所述磁转子900驱动所述阀针组件运动，以控制电子膨胀阀的流量大小。Referring to FIG. 4 , the electronic expansion valve proposed in this application includes a valve housing 100 , a magnetic rotor 900 , a nut 200 , and a valve needle assembly. The valve housing 100 includes an outer cover 101 and a valve seat 102 fixedly connected with the outer cover 101. The outer cover 101 and the valve seat 102 enclose to form a valve cavity 103. The magnetic rotor 900, the nut 200 and the valve needle assembly are all Set in the valve cavity 103, the magnetic rotor 900 can rotate relative to the valve housing 100, the nut 200 is fixedly connected to the valve seat 102, and the magnetic rotor 900 drives the movement of the valve needle assembly to control the electronic The flow rate of the expansion valve.
下面将对阀针组件的结构进行介绍。The structure of the valve needle assembly will be introduced below.
请一并参照图1和图4，该阀针组件包括：阀针500、限位套环700、轴承600、阀杆300以及弹性件310，所述阀针500具有相对的第一端501和第二端502，所述第一端501用于可分离地安装于所述电子膨胀阀的阀口104；所述限位套环700固定连接于所述第二端502，所述第二端502和所述限位套环700中的至少一者设置有安装槽，所述轴承600设于所述安装槽内，所述轴承600的外圈的两端面分别被阀针500和限位套环700抵接；所述阀杆300穿设于限位套环700后活动插设于所述轴承600的内圈；所述弹性件310的一端连接于所述阀杆300，另一端连接于所述轴承600。Please refer to FIG. 1 and FIG. 4 together. The valve needle assembly includes: a valve needle 500, a limit collar 700, a bearing 600, a valve stem 300 and an elastic member 310. The valve needle 500 has an opposite first end 501 and The second end 502, the first end 501 is used to be detachably installed on the valve port 104 of the electronic expansion valve; the limit collar 700 is fixedly connected to the second end 502, the second end 502 and at least one of the limiting collar 700 is provided with a mounting groove, the bearing 600 is arranged in the mounting groove, and the two ends of the outer ring of the bearing 600 are respectively covered by the valve needle 500 and the limiting collar. The ring 700 abuts; the valve stem 300 is movably inserted into the inner ring of the bearing 600 after passing through the limiting collar 700; one end of the elastic member 310 is connected to the valve stem 300, and the other end is connected to the The bearing 600.
可以理解，可以是限位套环700和第二端502中的一者设置有安装槽，以供轴承装设，另一者的端面直接抵接轴承600的外圈的其中一端面，安装槽内应形成有限位结构，用以抵接轴承600的外圈的另一端面；也可以是，限位套环700和第二端502分别设有槽口相对的安装槽，两个安装槽内均设置有限位结构，用以抵接轴承600的外圈的不同端面。由此，均可实现阀针500和限位套环700对轴承600的外圈的两端面的限位抵接。It can be understood that one of the limiting collar 700 and the second end 502 may be provided with a mounting groove for bearing installation, and the end face of the other one directly abuts against one end face of the outer ring of the bearing 600, and the mounting groove A limiting structure should be formed inside to abut against the other end face of the outer ring of the bearing 600; it can also be that the limiting collar 700 and the second end 502 are respectively provided with installation grooves opposite to the notch, and the two installation grooves Both of them are provided with limiting structures for abutting against different end surfaces of the outer ring of the bearing 600 . In this way, the limiting abutment of the valve needle 500 and the limiting collar 700 on both end surfaces of the outer ring of the bearing 600 can be realized.
在本申请的电子膨胀阀内，如图1所示，所述螺母200开设有沿其轴向延伸的安装孔210，所述阀针组件穿设于所述安装孔210，且所述阀杆300与所述螺母200螺纹连接。具体而言，所述阀杆300远离所述第一开口端的一端设有螺纹杆段，所述安装孔210包括与所述螺纹杆段适配的螺纹孔211段，所述螺纹杆段与所述螺纹孔211段相配合。所述阀座102上设有与所述阀针500对应的阀口104，所述阀针500可分离地安装于所述阀口104内。如此，线圈驱动磁转子900转动，磁转子900带动阀杆300转动，通过与螺纹杆段与螺纹孔211段的配合，阀杆300可同步进行周向转动和轴向运动，阀杆300再带动阀针500轴向向上运动或轴向向下运动，从而控制电子膨胀阀的流量大小。In the electronic expansion valve of the present application, as shown in FIG. 1 , the nut 200 is provided with an installation hole 210 extending axially, the valve needle assembly passes through the installation hole 210 , and the valve stem 300 is threadedly connected with the nut 200 . Specifically, the end of the valve rod 300 away from the first open end is provided with a threaded rod section, the mounting hole 210 includes a threaded hole 211 section adapted to the threaded rod section, and the threaded rod section is connected to the threaded rod section. The threaded hole 211 sections match. The valve seat 102 is provided with a valve port 104 corresponding to the valve needle 500 , and the valve needle 500 is detachably installed in the valve port 104 . In this way, the coil drives the magnetic rotor 900 to rotate, and the magnetic rotor 900 drives the valve stem 300 to rotate. By cooperating with the threaded rod section and the threaded hole 211 section, the valve stem 300 can simultaneously perform circumferential rotation and axial movement, and the valve stem 300 drives The valve needle 500 moves axially upwards or axially downwards, thereby controlling the flow rate of the electronic expansion valve.
在本申请的阀针组件中，分别通过阀针500和限位套环700在轴承600的轴向两侧对轴承600外圈进行限位，即可使轴承600固定安装于安装槽内。由此，在阀杆300同步进行周向转动和轴向运动，以驱动阀针500运动时，即使轴承600内圈被带动随阀杆300转动，与阀针500固定连接的轴承600外圈也能在周向上保持静止，阀针500也就不会被带动而发生周向转动。本申请中，通过使阀杆300与轴承600配合，抵消了阀杆300向阀针500传递的周向运动，使得阀针500只接收阀杆300传递的轴向运动，而不会相对阀口104转动，有利于减小阀针500与阀口104之间的磨损，从而保障电子膨胀阀的工作可靠性。具体地，阀杆300通过弹性件310驱动阀针500轴向移动，且阀针500至少可相对轴承600轴向移动，如此，当阀针500抵于阀口104后，阀杆300能够相对阀针500继续向下运动，从而压缩弹性件310，以使弹性件310能够为阀针500提供预紧力，从而使阀针500能够稳定地抵于阀口104，同时还可以避免阀针500过度挤压阀口104，而造成阀针500与阀口104之间的磨损。In the valve needle assembly of the present application, the outer ring of the bearing 600 is limited by the valve needle 500 and the limit collar 700 on both axial sides of the bearing 600 respectively, so that the bearing 600 can be fixedly installed in the installation groove. Therefore, when the valve stem 300 performs circumferential rotation and axial movement synchronously to drive the valve needle 500 to move, even if the inner ring of the bearing 600 is driven to rotate with the valve stem 300, the outer ring of the bearing 600 fixedly connected to the valve needle 500 will also Being able to keep still in the circumferential direction, the valve needle 500 will not be driven to rotate in the circumferential direction. In this application, by cooperating the valve stem 300 with the bearing 600, the circumferential motion transmitted from the valve stem 300 to the valve needle 500 is offset, so that the valve needle 500 only receives the axial movement transmitted by the valve stem 300, and does not move relative to the valve port. The rotation of 104 is beneficial to reduce the wear between the valve needle 500 and the valve port 104, thereby ensuring the working reliability of the electronic expansion valve. Specifically, the valve stem 300 drives the valve needle 500 to move axially through the elastic member 310, and the valve needle 500 can at least move axially relative to the bearing 600, so that when the valve needle 500 touches the valve port 104, the valve stem 300 can move relative to the valve port 104. The needle 500 continues to move downward, thereby compressing the elastic member 310, so that the elastic member 310 can provide a pre-tightening force for the valve needle 500, so that the valve needle 500 can stably abut the valve port 104, and at the same time, the valve needle 500 can also be prevented from being excessively Extruding the valve port 104 causes wear between the valve needle 500 and the valve port 104 .
具体而言，弹性件310的端部连接于轴承600的内圈的远离第一端501的端面，在一实施例中，弹性件310的端部与阀杆300及轴承600的内圈的端面相连接的方式为抵接或嵌接。其中，弹性件310的端部可以是直接抵接于阀杆300或轴承600的内圈的端面，也可以是，通过其他的零件间接抵接于阀杆300或轴承600的内圈的端面。不失一般性，如图1所示，本实施例中，所述弹性件310设置为弹簧，所述阀杆300的周壁设置有凸缘部320，所述弹簧套设于所述阀杆300，并一端抵接于所述凸缘部320，另一端抵接于所述轴承600的端面，以分别实现其与阀杆300以及轴承600的内圈的端面的连接。当然，在其他实施例中，弹性件310也可以设置为弹片、弹性橡胶套或弹性硅胶套。Specifically, the end of the elastic member 310 is connected to the end surface of the inner ring of the bearing 600 away from the first end 501. In one embodiment, the end of the elastic member 310 is connected to the end of the valve stem 300 and the inner ring of the bearing 600. The way of surface connection is abutment or scarfing. Wherein, the end of the elastic member 310 may directly contact the end surface of the valve stem 300 or the inner ring of the bearing 600 , or may indirectly contact the end surface of the valve stem 300 or the inner ring of the bearing 600 through other parts. Without loss of generality, as shown in FIG. 1 , in this embodiment, the elastic member 310 is set as a spring, the peripheral wall of the valve stem 300 is provided with a flange portion 320 , and the spring is sleeved on the valve stem 300 , and one end is abutted against the flange portion 320 , and the other end is abutted against the end surface of the bearing 600 , so as to realize their connection with the end surfaces of the valve stem 300 and the inner ring of the bearing 600 respectively. Of course, in other embodiments, the elastic member 310 can also be configured as an elastic piece, an elastic rubber sleeve or an elastic silicone sleeve.
在一些实施例中，请一并参阅图1和图2，所述第二端502设置有所述安装槽530，设于所述第二端502的安装槽530具有在轴向上分布的第一槽段和第二槽段，所述第一槽段的内径大于所述第二槽段的内径，而在所述第一槽段和所述第二槽段的连通处形成有限位台阶532，所述限位台阶532限位抵接于所述轴承600的外圈的靠近所述第一端501的端面。如此，第二槽段即形成有让位空间531，所述阀杆300的末端能够凸设于所述让位空间531，如此，阀杆300的末端能够向让位空间531运动，以压缩弹簧，从而为阀针500提供预紧力。当然，在其他实施例中，也可以是，通过延长轴承600的轴向长度，以提供足够的空间供阀杆300轴向运动，确保弹簧能够被压缩到位而能够向阀针500提供足够的预紧力。In some embodiments, please refer to FIG. 1 and FIG. 2 together, the second end 502 is provided with the installation groove 530, and the installation groove 530 provided on the second end 502 has a first axial distribution. A groove section and a second groove section, the inner diameter of the first groove section is larger than the inner diameter of the second groove section, and a limited step 532 is formed at the connection between the first groove section and the second groove section , the limit step 532 is limited against the end surface of the outer ring of the bearing 600 that is close to the first end 501 . In this way, the second groove section forms a relief space 531, and the end of the valve stem 300 can protrude from the relief space 531, so that the end of the valve stem 300 can move toward the relief space 531 to compress the spring , so as to provide pre-tightening force for the valve needle 500. Of course, in other embodiments, it is also possible to extend the axial length of the bearing 600 to provide enough space for the axial movement of the valve stem 300, so as to ensure that the spring can be compressed in place and provide sufficient pre-load to the valve needle 500. Tight force.
进一步地，请一并参阅图1和图3，所述限位套环700的靠近所述第一端501的端面限位抵接于所述轴承600的外圈的远离所述第一端501的端面，且所述限位套环700固定连接于所述第二端502的安装槽530的槽壁。不失一般性，限位套环700插设于第一槽段，并通过焊接的方式固定连接于第一槽段的槽壁。当然，在其他的实施例中，也可以是，轴承600的端面与第一槽段的端面平齐，限位套环700固定于第一槽段的端面，即可抵接于轴承600的外圈，此外，限位套环700还可通过卡接的方式与安装槽530相固定。Further, please refer to FIG. 1 and FIG. 3 together, the end surface of the limiting collar 700 close to the first end 501 abuts against the outer ring of the bearing 600 away from the first end 501 The end surface of the second end 502 , and the limiting collar 700 is fixedly connected to the groove wall of the installation groove 530 of the second end 502 . Without loss of generality, the limiting collar 700 is inserted into the first groove section, and is fixedly connected to the groove wall of the first groove section by welding. Of course, in other embodiments, it is also possible that the end face of the bearing 600 is flush with the end face of the first groove segment, and the limit collar 700 is fixed on the end face of the first groove segment, that is, it abuts against the outer surface of the bearing 600. In addition, the limiting collar 700 can also be fixed to the installation groove 530 by clamping.
可以理解，限位台阶532和限位套环700均应只抵接于轴承600的外圈的端面，以同时限制轴承600的外圈的轴向运动以及周向转动，轴承600的内圈的轴向运动也将随之被限制，但轴承600的内圈的周向转动不会受影响，以确保轴承600的内圈可被阀杆300带动，而起到抵消阀杆300的周向转动的作用。而且，限位台阶532和限位套环700相配合能在轴承600的轴向上提供很大的夹紧力，可避免轴承600的外侧面与安装槽530的槽壁之间发生摩擦，从而确保轴承600能够稳定安装于安装槽530内。It can be understood that both the limit step 532 and the limit collar 700 should only be in contact with the end face of the outer ring of the bearing 600, so as to simultaneously limit the axial movement and the circumferential rotation of the outer ring of the bearing 600, and the inner ring of the bearing 600 The axial movement will also be restricted accordingly, but the circumferential rotation of the inner ring of the bearing 600 will not be affected, so as to ensure that the inner ring of the bearing 600 can be driven by the valve stem 300 to counteract the circumferential rotation of the valve stem 300 role. Moreover, the cooperation of the limit step 532 and the limit collar 700 can provide a large clamping force in the axial direction of the bearing 600, which can avoid friction between the outer surface of the bearing 600 and the groove wall of the installation groove 530, thereby Ensure that the bearing 600 can be stably installed in the installation groove 530 .
进一步地，如图3所示，所述限位套环700包括在轴向上分布并相连接的第一导向段710和第一连接段720，所述第一连接段720与所述第一槽段的槽壁连接，所述第一导向段710的外径自连接于所述第一连接段720的一端朝向远离所述第一连接段720的一端逐渐减小。如此，在第一导向段710的引导下，能够更省力地限位套环700装入安装槽530内。当然，在其他实施例中，也可以是，第一槽段的远离第二槽段的端面设置有导向结构，既可引导限位套环700装入安装槽530，又可引导轴承600装入安装槽530。Further, as shown in FIG. 3 , the limiting collar 700 includes a first guide segment 710 and a first connecting segment 720 distributed in the axial direction and connected, and the first connecting segment 720 is connected to the first The groove walls of the groove sections are connected, and the outer diameter of the first guide section 710 gradually decreases from the end connected to the first connecting section 720 to the end away from the first connecting section 720 . In this way, under the guidance of the first guide section 710 , the limiting collar 700 can be inserted into the installation groove 530 with less effort. Of course, in other embodiments, it is also possible that the end surface of the first groove segment away from the second groove segment is provided with a guide structure, which can guide the limit collar 700 to be installed in the installation groove 530, and can also guide the bearing 600 to be installed in the installation groove 530. The slot 530 is installed.
进一步地，如图3所示，所述第一连接段720的两端各连接有一所述第一导向段710。也即，限位套环700的两端面均具有导向结构，在进行限位套环700的装配时，不必区分方向，限位套环700的任意一端装入安装槽530时，均能通过第一导向段710对其进行引导。如此，通过对限位套环700进行防呆设计，可提升本申请的电子膨胀阀的生产效率。Further, as shown in FIG. 3 , both ends of the first connecting section 720 are respectively connected with a first guiding section 710 . That is to say, both ends of the spacer collar 700 have guiding structures. When the spacer collar 700 is assembled, it is not necessary to distinguish the direction. A guide section 710 guides it. In this way, the production efficiency of the electronic expansion valve of the present application can be improved by performing a fool-proof design on the limit collar 700 .
在一些实施例中，如图1所示，所述阀针组件还包括固定套设于所述阀针500的末端的驱动套环800，所述驱动套环800位于所述轴承600的靠近所述第一端501的一侧，并可分离地抵于所述轴承600的端面。如此，当阀杆300向上轴向运动时，由于限位套环700抵接于轴承600的端面，限位套环700被轴承600带动轴向向上运动，轴承600受到抵推力也将随之向上运动，与轴承600固定连接的阀针500也将随之向上运动。当然，在其他实施例中，也可以是，阀杆300的末端的周缘设有驱动凸部，如此，在阀杆300向上轴向运动时，通过驱动凸部抵推轴承600的端面，同样能带动阀针500向上运动。In some embodiments, as shown in FIG. 1 , the valve needle assembly further includes a driving collar 800 fixedly sleeved on the end of the valve needle 500, and the driving collar 800 is located near the bearing 600. One side of the first end 501 and detachably abuts against the end surface of the bearing 600 . In this way, when the valve stem 300 moves upward and axially, since the limit collar 700 abuts against the end face of the bearing 600, the limit collar 700 is driven by the bearing 600 to move axially upward, and the bearing 600 will also move upward when it is thrust. movement, the valve needle 500 fixedly connected with the bearing 600 will also move upward accordingly. Of course, in other embodiments, it is also possible that the periphery of the end of the valve stem 300 is provided with a driving convex portion, so that when the valve stem 300 moves upward and axially, the driving convex portion pushes against the end surface of the bearing 600, which can also Drive the valve needle 500 to move upward.
进一步地，请一并参阅图1和图2，所述阀针500的末端设有定位台阶330，所述驱动套环800抵接于所述定位台阶330。如此，在将驱动套环800安装于阀针500的过程中，定位台阶330可起到定位的作用，当驱动套环800的端面抵接于定位台阶330时，即代表驱动套环800安装到位。当然，在其他实施例中，也可以是，驱动套环800内侧设置有定位台阶330，当阀杆300的末端抵接于该定位台阶330，即代表驱动套环800安装到位。Further, please refer to FIG. 1 and FIG. 2 together, the end of the valve needle 500 is provided with a positioning step 330 , and the driving collar 800 abuts against the positioning step 330 . In this way, during the process of installing the driving collar 800 on the valve needle 500, the positioning step 330 can play a positioning role. When the end surface of the driving collar 800 abuts against the positioning step 330, it means that the driving collar 800 is installed in place. . Of course, in other embodiments, a positioning step 330 may also be provided inside the driving collar 800 , and when the end of the valve stem 300 abuts against the positioning step 330 , it means that the driving collar 800 is installed in place.
进一步地，如图2所示，所述驱动套环800包括在轴向上分布的第二导向段820和第二连接段810，所述阀杆300与所述第二连接段810过盈配合，所述第二导向段820位于所述第二连接段810的靠近所述轴承600的一侧，所述第二导向段820的内径自靠近所述第二连接段810的一端朝向远离所述第二连接段810的一端逐渐增大。如此，第二导向段820可在阀杆300和驱动套环800的装配过程中起导向作用，而使得阀杆300***驱动套环800的操作能够更省力、更快捷。Further, as shown in FIG. 2 , the driving collar 800 includes a second guide section 820 and a second connecting section 810 distributed in the axial direction, and the valve stem 300 is interference-fitted with the second connecting section 810 , the second guiding section 820 is located on the side of the second connecting section 810 close to the bearing 600 , and the inner diameter of the second guiding section 820 faces away from the end close to the second connecting section 810 One end of the second connection section 810 gradually increases. In this way, the second guide section 820 can play a guiding role during the assembly process of the valve stem 300 and the driving collar 800 , so that the operation of inserting the valve stem 300 into the driving collar 800 can save labor and be faster.
进一步地，如图2所示，所述驱动套环800还包括位于所述第二连接段810的靠近所述轴承600的一侧的过渡段830，且所述驱动套环800具有两段所述第二导向段820，所述过渡段830通过一所述第二导向段820连接于所述驱动套环800的端面，通过另一所述第二导向段820连接于所述第二连接段810。也即，驱动套环800的靠近轴承600的一端和远离轴承600的一端之间，是依次相连接的第二导向段820、过渡段830、第二导向段820和第二连接段810，其中，过渡段830与阀杆300间隙配合。在进行驱动套环800的装配时，应将阀杆300自驱动套环800的靠近轴承600的一端***，由此，阀杆300的端部将先接触到驱动套环800该端的第二导向段820内径最大的位置，能够方便阀杆300的端部对位卡入，在第二导向段820的引导下，阀杆300的端部能够比较省力地***到过渡段830，而后经过过渡段830到达另一第二导向段820，该第二导向段820用于引导阀杆300***第二连接段810，由于，第二连接段810与阀杆300过盈配合，所以，在阀杆300的端部进入第二连接段810后，才需增大作用力，以使阀杆300继续***驱动套环800，直至驱动套环800抵接于定位台阶330。如此，能够更省力、更快捷地实现驱动套环800和阀杆300的装配，有利于提升电子膨胀阀的生产效率。Further, as shown in FIG. 2 , the driving collar 800 also includes a transition section 830 located on the side of the second connecting section 810 close to the bearing 600 , and the driving collar 800 has two sections. The second guide section 820, the transition section 830 is connected to the end surface of the driving collar 800 through a second guide section 820, and connected to the second connecting section through another second guide section 820 810. That is, between the end close to the bearing 600 and the end away from the bearing 600 of the driving collar 800, there are a second guide section 820, a transition section 830, a second guide section 820 and a second connecting section 810 connected in sequence, wherein , The transition section 830 is clearance fit with the valve stem 300 . When assembling the drive collar 800, the valve stem 300 should be inserted from the end of the drive collar 800 close to the bearing 600, so that the end of the valve stem 300 will first contact the second guide of this end of the drive collar 800. The position where the inner diameter of section 820 is the largest can facilitate the alignment and snap-in of the end of the valve stem 300. Under the guidance of the second guide section 820, the end of the valve stem 300 can be inserted into the transition section 830 with less effort, and then pass through the transition section 830 reaches another second guide section 820, the second guide section 820 is used to guide the valve stem 300 to be inserted into the second connecting section 810, because the second connecting section 810 is interference fit with the valve stem 300, so the valve stem 300 After the end of the valve enters the second connecting section 810 , it is necessary to increase the force to make the valve stem 300 continue to be inserted into the driving collar 800 until the driving collar 800 abuts against the positioning step 330 . In this way, the assembly of the driving collar 800 and the valve rod 300 can be realized more labor-saving and faster, which is beneficial to improving the production efficiency of the electronic expansion valve.
在本申请的电子膨胀阀内，如图4所示，阀腔103内还安装有导向套环400，所述导向套环400位于所述螺母200的靠近所述阀口104的一侧；所述阀针500穿设所述导向套环400后插设于所述阀口104内，在所述阀杆300的驱动下，所述阀针500在所述导向套环400的引导下沿轴向相对所述阀口104移动，从而打开或关闭所述阀口104。可以理解，导向套环400与阀口104同轴设置。一方面，通过导向套环400对阀针500的限制，能够提高阀针500和阀口104的同轴度；另一方面，当阀杆300驱动阀针500运动后，导向套环400能对阀针500的轴向运动起引导作用，以确保阀针500平稳运动。如此，阀针500在静止状态和运动状态均能与阀口104保持很高的同轴度，有利于确保阀口104开度控制的精确度，从而能够保障电子膨胀阀的工作可靠性。而且，在导向套环400的引导下，阀针500不会相对阀口104发生不必要的运动，由此，还能减小阀针500与阀口104之间的磨损，有利于延长阀针组件的使用寿命，以进一步保障电子膨胀阀的工作可靠性。In the electronic expansion valve of the present application, as shown in FIG. 4 , a guide collar 400 is installed in the valve cavity 103, and the guide collar 400 is located on the side of the nut 200 close to the valve port 104; The valve needle 500 passes through the guide collar 400 and is inserted into the valve port 104. Driven by the valve stem 300, the valve needle 500 is guided by the guide collar 400 along the axis. Move toward the valve port 104 to open or close the valve port 104 . It can be understood that the guide collar 400 is arranged coaxially with the valve port 104 . On the one hand, the concentricity between the valve needle 500 and the valve port 104 can be improved through the restriction of the guide collar 400 on the valve needle 500; on the other hand, when the valve stem 300 drives the valve needle 500 to move, the guide collar 400 can The axial movement of the valve needle 500 acts as a guide to ensure the smooth movement of the valve needle 500 . In this way, the valve needle 500 can maintain a high degree of coaxiality with the valve port 104 in both the static state and the moving state, which is beneficial to ensure the accuracy of the opening degree control of the valve port 104, thereby ensuring the reliability of the electronic expansion valve. Moreover, under the guidance of the guide collar 400, the valve needle 500 will not move unnecessary relative to the valve port 104, thereby reducing the wear between the valve needle 500 and the valve port 104, which is beneficial to prolong the valve needle. The service life of the components to further ensure the reliability of the electronic expansion valve.
进一步地，在本实施例中，请一并参阅图4和图9，所述阀针500包括相连接的针本体510和连接部520，所述针本体510穿设所述导向套环400后插设于所述阀口104内，所述连接部520具有位于所述螺母200的内腔的部分。具体而言，螺母200设有第一导向孔212，连接部520插设于第一导向孔212，而具有位于螺母200内腔的部分，螺母200通过第一导向孔212为连接部520的轴向运动提供导向；导向套环400设有第二导向孔401，以供针本体510穿设，从而引导其轴向移动。可以理解，第一导向孔212和第二导向孔401均与阀口104同轴，由于螺母200的第一导向孔212和导向套环400的第二导向孔401的双重的限位作用和引导作用，阀针500和阀口104的同轴度高，有利于确保阀口104开度控制的精确度，从而能够保障电子膨胀阀的工作可靠性。特别地，所述第二导向孔401的孔深大于或等于1mm，以满足针本体510的最大轴向运动进程，而使第二导向孔401在针本体510的轴向运动中均能提供导向作用。另外，在一实施例中，所述针本体510和所述连接部520可以一体成型，以提升阀针500的生产加工效率；亦或者，所述针本体510和所述连接部520分别独立成型后固定连接，以简化模具的结构及保障成品良率。Further, in this embodiment, please refer to FIG. 4 and FIG. 9 together, the valve needle 500 includes a connected needle body 510 and a connecting portion 520, and the needle body 510 passes through the guide collar 400 Inserted in the valve port 104 , the connecting portion 520 has a portion located in the lumen of the nut 200 . Specifically, the nut 200 is provided with a first guide hole 212, the connecting part 520 is inserted into the first guide hole 212, and has a part located in the inner cavity of the nut 200, and the nut 200 is the shaft of the connecting part 520 through the first guide hole 212. Guidance is provided for movement; the guide collar 400 is provided with a second guide hole 401 for the needle body 510 to pass through, so as to guide its axial movement. It can be understood that both the first guide hole 212 and the second guide hole 401 are coaxial with the valve port 104, because the first guide hole 212 of the nut 200 and the second guide hole 401 of the guide collar 400 have a dual limiting effect and guide Function, the coaxiality of the valve needle 500 and the valve port 104 is high, which is conducive to ensuring the accuracy of the opening control of the valve port 104, thereby ensuring the reliability of the electronic expansion valve. In particular, the depth of the second guide hole 401 is greater than or equal to 1mm, so as to meet the maximum axial movement process of the needle body 510, so that the second guide hole 401 can provide guidance during the axial movement of the needle body 510. effect. In addition, in one embodiment, the needle body 510 and the connecting portion 520 can be integrally formed to improve the production and processing efficiency of the valve needle 500; or, the needle body 510 and the connecting portion 520 can be formed independently The final connection is fixed to simplify the structure of the mold and ensure the yield of the finished product.
在一些实施例中，如图9所示，所述导向套环400还设有与第二导向孔401呈轴向分布并相连通的第一让位孔402，所述连接部520的与所述针本体510相连接的一端凸出于所述螺母200的内腔，并容置于所述第一让位孔402。进一步地，所述导向套环400内还设有第二让位孔403，所述第二让位孔403连通于所述第一让位孔402的远离所述第二导向孔401的一端，所述螺母200部分容置于所述第二让位孔403。可以理解，导向套环400的第二导向孔401需要供阀针500导向配合，而阀针500的位置靠近阀口104，若导向套环400通过第二导向孔401的外壁连接于阀壳体100，容易影响冷媒在阀口104附近的流动。本实施例中，在第二导向孔401远离阀口104的一侧依次设置有避让连接部520的第一让位孔402和避让螺母200的第二让位孔403，由此，导向套环400通过第一让位孔402的外壁或第二让位孔403的外壁固定连接于阀壳体100，即可导向套环400与阀壳体100的连接结构对冷媒的流动产生不良影响。In some embodiments, as shown in FIG. 9 , the guide collar 400 is further provided with a first relief hole 402 that is axially distributed and communicated with the second guide hole 401 , and the connecting portion 520 is connected with the second guide hole 401 . One end connected to the needle body 510 protrudes from the inner cavity of the nut 200 and is accommodated in the first relief hole 402 . Further, the guide collar 400 is also provided with a second relief hole 403, the second relief hole 403 communicates with the end of the first relief hole 402 away from the second guide hole 401, The nut 200 is partially accommodated in the second relief hole 403 . It can be understood that the second guide hole 401 of the guide collar 400 needs to guide and fit the valve needle 500, and the position of the valve needle 500 is close to the valve port 104. If the guide collar 400 is connected to the valve housing through the outer wall of the second guide hole 401 100, it is easy to affect the flow of refrigerant near the valve port 104. In this embodiment, the first relief hole 402 of the avoidance connection part 520 and the second relief hole 403 of the avoidance nut 200 are sequentially provided on the side of the second guide hole 401 away from the valve port 104, whereby the guide collar 400 is fixedly connected to the valve housing 100 through the outer wall of the first relief hole 402 or the outer wall of the second relief hole 403 , that is, the connection structure between the guide collar 400 and the valve housing 100 has adverse effects on the flow of refrigerant.
在一些实施例中，请一并参阅图4、图8和图9所示，所述导向套环400的外壁凸设有安装台阶410，所述阀壳体100的内壁对应设有台阶空间110，所述安装台阶410卡合于所述台阶空间110。具体地，安装台阶410形成于第一让位孔402和第二让位孔403相对的外壁，安装台阶410与台阶空间110相卡合，即可使导向套环400固定安装于阀壳体100。In some embodiments, please refer to FIG. 4 , FIG. 8 and FIG. 9 , the outer wall of the guide collar 400 is protruded with a mounting step 410 , and the inner wall of the valve housing 100 is correspondingly provided with a stepped space 110 , the installation step 410 is engaged with the step space 110 . Specifically, the installation step 410 is formed on the outer wall opposite the first relief hole 402 and the second relief hole 403, and the installation step 410 is engaged with the step space 110, so that the guide collar 400 can be fixedly installed on the valve housing 100 .
进一步地，如图9所示，所述台阶空间110由相连接的第一台阶面111和第二台阶面112共同构造形成，所述安装台阶410包括抵接于所述第一台阶面111的第三台阶面411和抵接于所述第二台阶面112的第四台阶面412，所述第一台阶面111并行于所述导向套环400的轴向设置。其中，第一台阶面111远离第二台阶面112的一端和第三台阶面411的靠近第四台阶面412的一端中的至少一者设置有导向结构，用以在导向套环400装配于阀壳体100时引导安装台阶410卡入台阶空间110。Further, as shown in FIG. 9 , the step space 110 is jointly formed by a connected first step surface 111 and a second step surface 112 , and the installation step 410 includes an abutment on the first step surface 111 The third stepped surface 411 and the fourth stepped surface 412 abutting against the second stepped surface 112 , the first stepped surface 111 is arranged parallel to the axial direction of the guide collar 400 . Wherein, at least one of the end of the first stepped surface 111 away from the second stepped surface 112 and the end of the third stepped surface 411 close to the fourth stepped surface 412 is provided with a guide structure for assembling the guide collar 400 on the valve. The casing 100 guides the installation step 410 to snap into the step space 110 .
具体地，如图9所示，在本实施例中，所述第一台阶面111的远离所述第二台阶面112的一侧设置有第一导向面113，所述第一导向面113在远离所述第一台阶面111的方向上逐渐远离所述第三台阶面411设置。进一步地，所述第三台阶面411的靠近所述第四台阶面412的一端设有两个第二导向面413，所述第二导向面413在远离所述第四台阶面412的方向上逐渐靠近所述第一台阶面111设置，两个所述第二导向面413之间设置有过渡面414，所述过渡面414与所述导向套环400的轴向相并行，所述过渡面414通过一所述第二导向面413连接于所述第三台阶面411，通过另一所述导向面连接于所述第四台阶面412。其中，为获得最佳的导向效果，可使第一导向面113和第二导向面413相并行设置，也即相平行设置或近似平行设置。Specifically, as shown in FIG. 9 , in this embodiment, a first guide surface 113 is provided on the side of the first stepped surface 111 away from the second stepped surface 112 , and the first guide surface 113 is The direction away from the first stepped surface 111 is gradually set away from the third stepped surface 411 . Further, one end of the third stepped surface 411 close to the fourth stepped surface 412 is provided with two second guide surfaces 413 , and the second guide surfaces 413 are in a direction away from the fourth stepped surface 412 Set gradually close to the first step surface 111, a transition surface 414 is provided between the two second guide surfaces 413, the transition surface 414 is parallel to the axial direction of the guide collar 400, the transition surface 414 is connected to the third step surface 411 through a second guide surface 413 and connected to the fourth step surface 412 through another guide surface. Wherein, in order to obtain the best guiding effect, the first guiding surface 113 and the second guiding surface 413 can be arranged in parallel, that is, arranged in parallel or approximately parallel.
在导向套环400装配于阀壳体100的过程中，更靠近第四台阶面412的第二导向面413先进入第一导向面113内侧的空间，而后，随着安装台阶410逐渐卡入台阶空间110，过渡面414、另一导向面、第三台阶面411依次进入第一导向面113内侧的空间，在这个过程中第一导向面113和第二导向面413中的至少一者能起到引导装配的作用，直至第三台阶面411与第一台阶面111相接触。如此，通过阶梯式的导向结构，可使导向套环400装配于阀壳体100的过程更省力更快捷，有利于提升电子膨胀阀的生产效率。In the process of assembling the guide collar 400 on the valve housing 100, the second guide surface 413 closer to the fourth step surface 412 first enters the space inside the first guide surface 113, and then gradually snaps into the step with the installation step 410. The space 110, the transition surface 414, another guide surface, and the third step surface 411 enter the space inside the first guide surface 113 successively, and at least one of the first guide surface 113 and the second guide surface 413 can play a role in this process. To guide the assembly until the third stepped surface 411 is in contact with the first stepped surface 111 . In this way, through the stepped guide structure, the process of assembling the guide collar 400 on the valve housing 100 can be made more labor-saving and faster, which is beneficial to improve the production efficiency of the electronic expansion valve.
在一些实施例中，请一并参阅图4和图9，所述阀壳体100的侧壁开设有冷媒过口105，所述导向套环400设有相对所述冷媒过口105的导流锥面420。如此，在冷媒在冷媒过口105和阀口104之间流动时，导流锥面420能够起到引导冷媒流动的作用，避免冷媒流动混乱，而影响电子膨胀阀的工作性能。In some embodiments, please refer to FIG. 4 and FIG. 9 together, the side wall of the valve housing 100 is provided with a refrigerant passage 105 , and the guide collar 400 is provided with a flow guide relative to the refrigerant passage 105 Conical surface 420. In this way, when the refrigerant flows between the refrigerant port 105 and the valve port 104 , the conical guide surface 420 can guide the flow of the refrigerant, avoiding the disorder of the refrigerant flow and affecting the performance of the electronic expansion valve.
在一些实施例中，请参阅图4，所述阀腔103包括分别位于所述导向套环400的轴向两侧的第一阀腔1031和第二阀腔1032，所述导向套环400或所述阀壳体100上设有用于连通所述第一阀腔1031和所述第二阀腔1032的平衡通道。由于平衡通道的设置，第一阀腔1031和第二阀腔1032的气压能够相平衡，有利于保证电子膨胀阀内部压力的稳定性，能够减小阀针500的动作阻力，从而保障电子膨胀阀的工作性能。In some embodiments, please refer to FIG. 4 , the valve cavity 103 includes a first valve cavity 1031 and a second valve cavity 1032 respectively located on both axial sides of the guide collar 400 , and the guide collar 400 or The valve housing 100 is provided with a balancing channel for communicating the first valve cavity 1031 and the second valve cavity 1032 . Due to the setting of the balance channel, the air pressure in the first valve chamber 1031 and the second valve chamber 1032 can be balanced, which is beneficial to ensure the stability of the internal pressure of the electronic expansion valve, and can reduce the movement resistance of the valve needle 500, thereby ensuring the stability of the electronic expansion valve. work performance.
在一实施例中，所述第一台阶面111和所述第三台阶面411中的至少一者凹设有第一过气槽，所述第二台阶面112和所述第四台阶面412中的至少一者凹设有连通于所述第一过气槽的第二过气槽，以在所述第一过气槽和所述第二过气槽内形成所述平衡通道。不失一般性，在一实施例中，第一台阶面111、第二台阶面112、第三台阶面411和第四台阶面412均设置为环形，以使安装台阶410和台阶空间110均对应呈环形，第一台阶面111和第三台阶面411既具有相抵接的部分，又具有凹陷形成第一过气槽的部分，同理，第二台阶面112和第四台阶面412，既具有相抵接的部分，又具有凹陷形成第二过气槽的部分。如此，既可确保安装台阶410稳定地卡合于台阶空间110，又可形成平衡通道供第一阀腔1031和第二阀腔1032相连通。本实施例中，第一阀腔1031位于导向套环400的远离阀口104的一侧，第一过气槽的两端分别连通于第一阀腔1031和第二过气槽的一端，第二过气槽的另一端连通于第二阀腔1032，如此，即可实现第一阀腔1031与第二阀腔1032的连通，有利于保证电子膨胀阀内部压力的稳定性，从而保障电子膨胀阀的工作稳定性。In one embodiment, at least one of the first stepped surface 111 and the third stepped surface 411 is recessed with a first air passage groove, and the second stepped surface 112 and the fourth stepped surface 412 At least one of them is recessed with a second air passage connected to the first air passage, so as to form the balance passage in the first air passage and the second air passage. Without loss of generality, in one embodiment, the first stepped surface 111, the second stepped surface 112, the third stepped surface 411 and the fourth stepped surface 412 are all arranged in a ring shape, so that the installation step 410 and the stepped space 110 all correspond to Ring-shaped, the first stepped surface 111 and the third stepped surface 411 not only have abutting parts, but also have a concave part to form the first air passage groove. Similarly, the second stepped surface 112 and the fourth stepped surface 412 have both The abutting part also has a part that is recessed to form the second gas passage groove. In this way, it can not only ensure that the installation step 410 is stably engaged with the step space 110 , but also form a balance passage for the first valve cavity 1031 and the second valve cavity 1032 to communicate. In this embodiment, the first valve chamber 1031 is located on the side of the guide collar 400 away from the valve port 104, and the two ends of the first air passage groove are respectively connected to the first valve chamber 1031 and one end of the second air passage groove. The other end of the second air passage tank is connected to the second valve cavity 1032, so that the communication between the first valve cavity 1031 and the second valve cavity 1032 can be realized, which is beneficial to ensure the stability of the internal pressure of the electronic expansion valve, thereby ensuring the electronic expansion The working stability of the valve.
在一实施例中，如图9所示，所述导向套环400的外壁还设有连接面430，所述安装台阶410通过所述连接面430连接于所述导流锥面420，所述连接面430开设有贯穿所述导向套环400的内壁的过气孔440，以在所述过气孔440内形成所述平衡通道。具体地，连接面430与阀壳体100的内壁面之间具有间隙，且连接面430相对于第一让位孔402设置，过气孔440自连接面430贯穿至第一让位孔402的内壁面。如此，第一阀腔1031能通过过气孔440连通于第一让位孔402。可以理解，第一让位孔402为避让连接部520，其与连接部520之间具有较大的间隙，而第二让位孔403为避让螺母200，也与螺母200之间具有较大的间隙，由此，第一让位孔402和第二让位孔403内的空间均属于第二阀腔1032的空间。第一阀腔1031连通于第一让位孔402，也即连通于第二阀腔1032，而能保证电子膨胀阀内部压力的稳定性，从而保障电子膨胀阀的工作稳定性。In one embodiment, as shown in FIG. 9 , the outer wall of the guide collar 400 is further provided with a connection surface 430, and the installation step 410 is connected to the flow guide cone surface 420 through the connection surface 430, the The connection surface 430 defines an air passage hole 440 penetrating through the inner wall of the guide collar 400 to form the balance passage in the air passage hole 440 . Specifically, there is a gap between the connection surface 430 and the inner wall surface of the valve housing 100, and the connection surface 430 is set relative to the first relief hole 402, and the air passage hole 440 penetrates from the connection surface 430 to the inside of the first relief hole 402. wall. In this way, the first valve cavity 1031 can communicate with the first relief hole 402 through the air passage hole 440 . It can be understood that the first relief hole 402 is an avoidance connection part 520, and there is a larger gap between it and the connection part 520, while the second relief hole 403 is an avoidance nut 200, and there is a larger gap between it and the nut 200. Therefore, the spaces in the first relief hole 402 and the second relief hole 403 belong to the space of the second valve cavity 1032 . The first valve chamber 1031 communicates with the first relief hole 402 , that is, communicates with the second valve chamber 1032 , so as to ensure the stability of the internal pressure of the electronic expansion valve, thereby guaranteeing the working stability of the electronic expansion valve.
进一步地，请一并参阅图4至图7，所述针本体510与所述导向套环400之间及所述针本体510与所述阀口104之间均为间隙配合，所述连接部520与所述螺母200的内壁面呈间隙设置，所述连接部520与所述螺母200之间的配合间隙大于所述针本体510与所述阀口104的内壁面之间的最小配合间隙，且所述针本体510与所述导向套环400之间的配合间隙大于所述针本体510与所述阀口104的内壁面之间的最小配合间隙。Further, please refer to FIG. 4 to FIG. 7 together, the gap fit between the needle body 510 and the guide collar 400 and between the needle body 510 and the valve port 104 are all clearance fit, and the connecting part 520 and the inner wall of the nut 200 are provided with a gap, and the fitting gap between the connecting part 520 and the nut 200 is greater than the minimum fitting gap between the needle body 510 and the inner wall of the valve port 104, Moreover, the matching gap between the needle body 510 and the guide collar 400 is greater than the minimum matching gap between the needle body 510 and the inner wall of the valve port 104 .
具体地，连接部520与螺母200之间的配合间隙即为连接部520的外壁面与第一导向孔212的内壁面的间隙（即图7中的D3）。针本体510具有沿轴向分布的主体段511和尖端512，主体段511穿设于第二导向孔401，并与第二导向孔401间隙配合，针本体510与导向套环400之间的配合间隙即为主体段511的外壁面和第二导向的内壁面之间的间隙（即图6中的D2）；尖端512即为用于插设阀口104的第一端501，且尖端512在插设于阀口104后与阀口104的内壁面间隙配合，针本体510与阀口104的内壁面之间的最小配合间隙即为尖端512与阀口104的内壁面的最小配合间隙（即图5中的D1）。另外，由于该最小配合间隙的存在，当阀针500关闭阀口104时，尖端512的外壁面与阀口104的内壁面之间具有一定的间隙，可减小阀针500与阀口104之间的摩擦，避免阀针500卡死。Specifically, the fit gap between the connecting portion 520 and the nut 200 is the gap between the outer wall of the connecting portion 520 and the inner wall of the first guide hole 212 (ie, D3 in FIG. 7 ). The needle body 510 has a main body section 511 and a tip 512 distributed along the axial direction, the main body section 511 is passed through the second guide hole 401, and is in clearance fit with the second guide hole 401, the cooperation between the needle body 510 and the guide collar 400 The gap is the gap between the outer wall surface of the main body section 511 and the inner wall surface of the second guide (that is, D2 in Figure 6); the tip 512 is the first end 501 for inserting the valve port 104, and the tip 512 is in the After being inserted into the valve port 104, it fits with the inner wall surface of the valve port 104. The minimum fit gap between the needle body 510 and the inner wall surface of the valve port 104 is the minimum fit gap between the tip 512 and the inner wall surface of the valve port 104 (i.e. D1 in Figure 5). In addition, due to the existence of the minimum fit clearance, when the valve needle 500 closes the valve port 104, there is a certain gap between the outer wall surface of the tip 512 and the inner wall surface of the valve port 104, which can reduce the distance between the valve needle 500 and the valve port 104. The friction between them prevents the valve needle 500 from being stuck.
在本申请的电子膨胀阀中，当有异物卡在阀口104与阀针500之间时，即使针本体510的尖端512发生偏斜，而由于针本体510的主体段511与第二导向孔401的配合间隙大于尖端512与阀口104的内壁面之间的最小配合间隙，则使得主体段511和第二导向孔401的内壁面之间具有足够的活动空间，主体段511被带动而相对第二导向孔401倾斜，也不会与第二导向孔401相卡死，而是仍与第二导向孔401的内壁面保持一定的间隙，也就不会影响针本体510的上下移动，且由于连接部520的外壁面与螺母200的内壁面之间的间隙大于尖端512与阀口104的内壁面之间的最小配合间隙，连接部520与螺母200的第一导向孔212之间也具有足够的活动空间，同样地，连接部520被带动而相对第一导向孔212的内壁面倾斜后，也不会与第一导向孔212卡死，而是仍与第一导向孔212的内壁面保持一定的间隙，如此，同样不会影响阀针500整体的上下移动。总括而言，当阀针500的尖端512与阀口104之间卡入异物时，由于阀针500的主体段511在导向套环400的内腔，以及连接部520在螺母200的内腔均具有足够的偏差活动空间，阀针500依然能够在上下方向上顺畅移动，从而可有效避免阀针500卡死，且同时还能够避免阀针组件组装过程中同轴度偏差导致的偏心对阀针500的影响。In the electronic expansion valve of the present application, when a foreign matter is stuck between the valve port 104 and the valve needle 500, even if the tip 512 of the needle body 510 is deflected, the main body section 511 of the needle body 510 and the second guide hole The matching gap of 401 is greater than the minimum fitting gap between the tip 512 and the inner wall of the valve port 104, so that there is enough movable space between the main body section 511 and the inner wall of the second guide hole 401, and the main body section 511 is driven to be opposite to each other. The second guide hole 401 is inclined, and will not be stuck with the second guide hole 401, but still maintains a certain gap with the inner wall of the second guide hole 401, which will not affect the up and down movement of the needle body 510, and Since the gap between the outer wall surface of the connecting portion 520 and the inner wall surface of the nut 200 is greater than the minimum fitting gap between the tip 512 and the inner wall surface of the valve port 104, there is also a gap between the connecting portion 520 and the first guide hole 212 of the nut 200. Enough space for movement, similarly, after the connecting portion 520 is driven and inclined relative to the inner wall of the first guide hole 212, it will not be stuck with the first guide hole 212, but is still in contact with the inner wall of the first guide hole 212. A certain gap is maintained, so that the overall up and down movement of the valve needle 500 will not be affected. In summary, when a foreign object is caught between the tip 512 of the valve needle 500 and the valve port 104, since the main body section 511 of the valve needle 500 is in the inner cavity of the guide collar 400 and the connecting portion 520 is in the inner cavity of the nut 200 With sufficient deviation space, the valve needle 500 can still move smoothly in the up and down direction, thus effectively preventing the valve needle 500 from being stuck, and at the same time avoiding the eccentric alignment of the valve needle caused by the deviation of the coaxiality during the assembly process of the valve needle assembly. 500 impact.
进一步地，在本实施例中，所述连接部520与所述螺母200之间的配合间隙大于所述针本体510与所述导向套环400之间的配合间隙，也即，连接部520的外壁面和第一导向孔212的内壁面之间的间隙D3大于主体段511的外壁面与第二导向孔401的内壁面之间的间隙D2。可以理解，在阀口104打开时，针本体510的尖端512脱离阀口104，此时，若有异物卡入主体段511与第二导向孔401的间隙，即使主体段511相对第二导向孔401倾斜，而带动连接部520相对第一导向孔212倾斜，连接部520也不会与第一导向孔212卡死，而是仍与第一导向孔212的内壁面保持一定的间隙，如此，仍旧不会影响阀针500整体的上下移动。Further, in this embodiment, the fitting gap between the connecting portion 520 and the nut 200 is greater than the fitting gap between the needle body 510 and the guide collar 400 , that is, the fitting gap of the connecting portion 520 The gap D3 between the outer wall surface and the inner wall surface of the first guide hole 212 is larger than the gap D2 between the outer wall surface of the main body section 511 and the inner wall surface of the second guide hole 401 . It can be understood that when the valve port 104 is opened, the tip 512 of the needle body 510 breaks away from the valve port 104. At this time, if a foreign object is caught in the gap between the main body section 511 and the second guide hole 401, even if the main body section 511 is opposite to the second guide hole 401 401 tilts, and drives the connecting part 520 to tilt relative to the first guide hole 212, the connecting part 520 will not be stuck with the first guide hole 212, but still maintains a certain gap with the inner wall of the first guide hole 212, so, Still will not affect the overall up and down movement of the valve needle 500 .
进一步地，在本实施例中，如图4所示，所述螺母200设有于所述第一导向孔212相连通的螺纹孔211，所述螺纹孔211位于所述第一导向孔212的远离所述阀口104的一侧，所述阀杆300的一端驱动连接于所述连接部520，所述阀杆300的另一端与所述螺纹孔211螺纹连接，如此，线圈驱动磁转子900转动，磁转子900带动阀杆300转动，通过与螺母200的螺纹配合，阀杆300可同步进行周向转动和轴向运动，阀杆300再带动阀针500轴向向上运动或轴向向下运动，从而控制电子膨胀阀的流量大小。而阀杆300的螺纹段与螺纹孔211间隙配合，则使得阀杆300可相对螺母200在径向上具有一定的移动偏差，从而阀杆300及螺母200能够进一步吸收同心偏差，以提升整体同轴度。Further, in this embodiment, as shown in FIG. 4 , the nut 200 is provided with a threaded hole 211 communicating with the first guide hole 212 , and the threaded hole 211 is located at the end of the first guide hole 212 . On the side away from the valve port 104 , one end of the valve stem 300 is drivingly connected to the connecting portion 520 , and the other end of the valve stem 300 is threadedly connected to the threaded hole 211 , so that the coil drives the magnetic rotor 900 Rotate, the magnetic rotor 900 drives the valve stem 300 to rotate, and through the threaded cooperation with the nut 200, the valve stem 300 can simultaneously perform circumferential rotation and axial movement, and the valve stem 300 drives the valve needle 500 to move axially upward or downward Movement, thereby controlling the flow rate of the electronic expansion valve. The threaded section of the valve stem 300 fits with the threaded hole 211 in a clearance, so that the valve stem 300 can have a certain movement deviation in the radial direction relative to the nut 200, so that the valve stem 300 and the nut 200 can further absorb the concentric deviation to improve the overall coaxial movement. Spend.
本实施例中，所述阀杆300与所述螺纹孔211之间的配合间隙大于所述连接部520与所述第一导向孔212之间的配合间隙（即D3）。可以理解，阀杆300与阀针500同轴配合，在连接部520相对第一导向孔212倾斜时，由于阀杆300与螺母200的最小配合间隙出现在阀杆300的螺纹段和螺纹孔211之间，这个间隙值大于连接部520与第一导向孔212的配合间隙，由此，阀杆300和螺纹段和螺纹孔211之间具有足够的活动空间，即使阀杆300被带动而相对螺母200发生倾斜，阀杆300的螺纹段也不会与螺母200的螺纹孔211相卡死，不会影响电子膨胀阀的阀针组件的上下移动。In this embodiment, the fit gap between the valve stem 300 and the threaded hole 211 is larger than the fit gap (ie D3 ) between the connecting portion 520 and the first guide hole 212 . It can be understood that the valve stem 300 is coaxially matched with the valve needle 500 , and when the connecting portion 520 is inclined relative to the first guide hole 212 , due to the minimum fitting clearance between the valve stem 300 and the nut 200 , the threaded section of the valve stem 300 and the threaded hole 211 Between, this gap value is greater than the matching gap between the connecting part 520 and the first guide hole 212, thus, there is enough space for movement between the valve stem 300 and the threaded section and the threaded hole 211, even if the valve stem 300 is driven to move against the nut 200 is tilted, the threaded section of the valve stem 300 will not be stuck with the threaded hole 211 of the nut 200, and will not affect the up and down movement of the valve needle assembly of the electronic expansion valve.
本申请还提出一种制冷设备，该制冷设备包括电子膨胀阀，该电子膨胀阀的具体结构参照上述实施例，由于本制冷设备采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。其中，制冷设备可以为空调器、冷冻机、冰箱、热泵热水器等。The present application also proposes a refrigeration device, which includes an electronic expansion valve. For the specific structure of the electronic expansion valve, refer to the above-mentioned embodiments. Since this refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it has at least the above-mentioned embodiments. All the beneficial effects brought by the technical solution will not be repeated here. Wherein, the refrigeration equipment may be an air conditioner, a freezer, a refrigerator, a heat pump water heater, and the like.
以上所述仅为本申请的可选实施例，并非因此限制本申请的专利范围，凡是在本申请的发明构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。The above are only optional embodiments of the present application, and are not intended to limit the patent scope of the present application. Under the inventive concept of the present application, the equivalent structural transformations made by using the description of the application and the contents of the accompanying drawings, or direct/indirect Applications in other relevant technical fields are included in the patent protection scope of the present application.

Claims (10)

  1. 一种阀针组件，应用于电子膨胀阀，其中，所述阀针组件包括：A valve needle assembly applied to an electronic expansion valve, wherein the valve needle assembly includes:
    阀针，具有相对的第一端和第二端，所述第一端用于可分离地安装于所述电子膨胀阀的阀口；a valve needle having opposite first and second ends, the first end being detachably mounted on a valve port of the electronic expansion valve;
    限位套环，固定连接于所述第二端，所述第二端和所述限位套环中的至少一者设置有安装槽；A limiting collar fixedly connected to the second end, at least one of the second end and the limiting collar is provided with a mounting groove;
    轴承，设于所述安装槽内，所述轴承的外圈的两端面分别被所述阀针和所述限位套环限位抵接；The bearing is arranged in the installation groove, and the two end surfaces of the outer ring of the bearing are limitedly abutted by the valve needle and the limiting collar respectively;
    阀杆，穿设于所述限位套环后活动插设于所述轴承的内圈；以及The valve stem is movably inserted into the inner ring of the bearing after passing through the limiting collar; and
    弹性件，一端连接于所述阀杆，另一端连接于所述轴承。One end of the elastic member is connected to the valve stem, and the other end is connected to the bearing.
  2. 如权利要求1所述的阀针组件，其中，所述第二端设置有所述安装槽，设于所述第二端的安装槽具有在轴向上分布的第一槽段和第二槽段，所述第一槽段的内径大于所述第二槽段的内径，而在所述第一槽段和所述第二槽段的连通处形成有限位台阶，所述限位台阶限位抵接于所述轴承的外圈的靠近所述第一端的端面。The valve needle assembly according to claim 1, wherein the second end is provided with the installation groove, and the installation groove provided at the second end has a first groove section and a second groove section distributed in the axial direction , the inner diameter of the first slot section is greater than the inner diameter of the second slot section, and a limiting step is formed at the connection between the first slot section and the second slot section, and the limiting step stops against connected to the end face of the outer ring of the bearing close to the first end.
  3. 如权利要求2所述的阀针组件，其中，所述限位套环的靠近所述第一端的端面限位抵接于所述轴承的外圈的远离所述第一端的端面，且所述限位套环固定连接于所述第二端的安装槽的槽壁。The valve needle assembly according to claim 2, wherein the end surface of the limiting collar close to the first end is limitedly abutted against the end surface of the outer ring of the bearing away from the first end, and The limiting collar is fixedly connected to the groove wall of the installation groove at the second end.
  4. 如权利要求3所述的阀针组件，其中，所述限位套环插设于所述第一槽段。The valve needle assembly as claimed in claim 3, wherein the limiting collar is inserted into the first groove segment.
  5. 如权利要求4所述的阀针组件，其中，所述限位套环通过焊接的方式与所述第一槽段的槽壁相连接。The valve needle assembly according to claim 4, wherein the limiting collar is connected to the groove wall of the first groove section by welding.
  6. 如权利要求1所述的阀针组件，其中，所述阀针组件还包括固定套设于所述阀针的末端的驱动套环，所述驱动套环位于所述轴承的靠近所述第一端的一侧。The valve needle assembly according to claim 1, wherein said valve needle assembly further comprises a driving collar fixedly sleeved on the end of said valve needle, said driving collar is located near said first bearing side of the end.
  7. 如权利要求6所述的阀针组件，其中，所述阀杆的末端设有定位台阶，所述驱动套环抵接于所述定位台阶。The valve needle assembly according to claim 6, wherein a positioning step is provided at the end of the valve stem, and the driving collar abuts against the positioning step.
  8. 如权利要求1至7所任一项所述的阀针组件，其中，所述阀针包括相连接的针本体和连接部，所述第一端位于所述针本体，所述第二端位于所述连接部，所述针本体和所述连接部一体成型，或，所述针本体和所述连接部分别独立成型后固定连接；The valve needle assembly according to any one of claims 1 to 7, wherein the valve needle comprises a connected needle body and a connecting portion, the first end is located at the needle body, and the second end is located at The connection part, the needle body and the connection part are integrally formed, or the needle body and the connection part are formed independently and fixedly connected;
    和/或，所述弹性件设置为弹簧，所述阀杆的周壁在所述轴承的远离所述第一端的一侧凸设有凸缘部，所述弹簧套设于所述阀杆，并位于所述凸缘部和所述轴承的端面之间。And/or, the elastic member is configured as a spring, the peripheral wall of the valve stem protrudes from the side of the bearing away from the first end with a flange, and the spring is sleeved on the valve stem, and located between the flange portion and the end surface of the bearing.
  9. 一种电子膨胀阀，其中，包括：An electronic expansion valve, including:
    螺母，所述螺母开设有安装孔；a nut, the nut is provided with a mounting hole;
    如权利要求1至8任一项所述的阀针组件，所述阀针组件的阀杆穿设于所述安装孔并与所述螺母螺纹连接。The valve needle assembly according to any one of claims 1 to 8, wherein the valve stem of the valve needle assembly passes through the installation hole and is threadedly connected with the nut.
  10. 一种制冷设备，其中，包括权利要求9所述的电子膨胀阀。A refrigeration device, comprising the electronic expansion valve according to claim 9.
PCT/CN2022/079336 2022-01-26 2022-03-04 Valve needle assembly, electronic expansion valve and refrigeration device WO2023142223A1 (en)

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CN114923013B (en) * 2022-05-05 2024-06-21 广东威灵电机制造有限公司 Electronic expansion valve and refrigeration equipment

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CN210123020U (en) * 2019-04-29 2020-03-03 苏州华越金属有限公司 Electronic expansion valve
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US5324000A (en) * 1993-02-19 1994-06-28 Boc Health Care, Inc. Non-rotating needle valve
CN103912689A (en) * 2013-01-08 2014-07-09 艾默生环境优化技术(苏州)有限公司 Valve needle assembly and electronic expansion valve comprising same
CN110345267A (en) * 2018-04-02 2019-10-18 浙江三花制冷集团有限公司 A kind of motor-driven valve
WO2020132967A1 (en) * 2018-12-26 2020-07-02 浙江盾安禾田金属有限公司 Electronic expansion valve
US20210031313A1 (en) * 2019-08-01 2021-02-04 Mahle International Gmbh Method for mounting a valve needle and a bearing bush in an expansion valve for an air conditioning system
CN210920163U (en) * 2019-09-24 2020-07-03 浙江盾安禾田金属有限公司 Valve core assembly and electronic expansion valve with same

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