WO2022057421A1 - 电子膨胀阀、冷媒循环管路及空调器系统 - Google Patents

电子膨胀阀、冷媒循环管路及空调器系统 Download PDF

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Publication number
WO2022057421A1
WO2022057421A1 PCT/CN2021/106390 CN2021106390W WO2022057421A1 WO 2022057421 A1 WO2022057421 A1 WO 2022057421A1 CN 2021106390 W CN2021106390 W CN 2021106390W WO 2022057421 A1 WO2022057421 A1 WO 2022057421A1
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WIPO (PCT)
Prior art keywords
valve
electronic expansion
main
section
needle
Prior art date
Application number
PCT/CN2021/106390
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English (en)
French (fr)
Inventor
郜哲明
许学飞
Original Assignee
广东美的制冷设备有限公司
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
Priority claimed from CN202022064983.9U external-priority patent/CN212318817U/zh
Priority claimed from CN202010991712.XA external-priority patent/CN114278744A/zh
Application filed by 广东美的制冷设备有限公司 filed Critical 广东美的制冷设备有限公司
Priority to EP21868250.8A priority Critical patent/EP4160068A4/en
Publication of WO2022057421A1 publication Critical patent/WO2022057421A1/zh

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    • 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
    • F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present application relates to the technical field of electronic expansion valves, and in particular, to an electronic expansion valve, a refrigerant circulation pipeline and an air conditioner system.
  • the main purpose of this application is to propose an electronic expansion valve, a refrigerant circulation pipeline and an air conditioner system, aiming at optimizing the structure of the electronic expansion valve and improving the refrigerant sound of the electronic expansion valve.
  • an electronic expansion valve comprising:
  • valve seat forming a main valve cavity
  • the valve needle assembly includes a valve needle sleeve sleeved in the main valve cavity, the valve needle sleeve has a needle sleeve cavity, one end wall of the needle sleeve cavity is formed with a main valve port, and the main valve port includes a The first diversion hole section, the second diversion hole section, and the rectification hole section between the first diversion hole section and the second diversion hole section are distributed in the direction toward the outer end of the main valve port, so The rectification hole section is connected with the first guide hole section, and the diameter of the rectification hole section is larger than the diameter of the first guide hole section, so that the rectification hole section and the first guide hole section are connected.
  • the inner walls are arranged in steps.
  • the diameter of the first guide hole segment is D
  • the diameter of the rectification hole segment is D 1
  • the valve needle assembly further includes a valve needle disposed in the valve needle sleeve, the needle tip portion of the valve needle is at least partially disposed in the main valve port, and the end surface of the needle tip portion is connected to the valve needle.
  • the distance between the bottom walls of the needle sleeve cavity is L;
  • the length of the first guide hole segment is L 1
  • the length of the rectification hole segment is L 2
  • the length of the second guide hole segment is L 3
  • the end portion of the valve needle sleeve corresponding to the main valve port is protruded outside the main valve cavity to form a protruding portion
  • the electronic expansion valve further comprises a vertical pipe, one end of the vertical pipe is externally connected to the protruding portion, and the inner diameter of the vertical pipe is DL ;
  • the inner diameter of the port of the main valve port is D 2 , and 0.1 ⁇ (D L ⁇ D 2 )/D 2 ⁇ 0.4.
  • the diameter of the rectifying hole segment is D 1 , and 0.65 ⁇ D 1 /D 2 ⁇ 0.85.
  • the outer surface of the protruding portion is arranged in steps, and in the direction toward the outer end of the main valve port, the protruding portion includes a first protruding section and an outer diameter that are connected in sequence and have a larger outer diameter.
  • the vertical pipe is externally connected to the first protruding section, and a liquid retention gap is formed between the second protruding section and the vertical pipe.
  • the inner diameter of the second diversion hole segment is gradually increased, and the inner wall surface at the port of the second diversion hole segment and the first The outer sides of the two protruding sections are connected.
  • the length of the first protruding section is L 4
  • the length of the second protruding section is L 5
  • the length of the rectification hole segment is L 2
  • the depth of the second guide hole segment is L 3
  • the inner side wall of the needle sleeve cavity is provided with a main overflow hole that communicates with the main valve cavity.
  • the electronic expansion valve further comprises a cross pipe communicating with the main valve cavity, the cross pipe extending along the radial direction of the valve needle sleeve;
  • the main overflow hole and the cross pipe are staggered.
  • the included angle formed between the center line of the main overflow hole and the radial plane of the valve needle sleeve is ⁇ , and 30° ⁇ 60°.
  • ⁇ 45°.
  • the inner diameter of the needle sleeve cavity is D S ;
  • the diameter of the main overflow hole is d, and 1.8mm ⁇ d ⁇ 0.71D S .
  • a plurality of the main overflow holes are provided, and are arranged at intervals along the circumferential direction of the main valve cavity.
  • the valve needle assembly further includes a valve needle disposed in the valve needle sleeve, the valve needle includes a movable part that is sealed and slidably installed in the valve needle sleeve, and is connected to the movable part.
  • the needle tip portion is at least partially set in the main valve port, the movable portion has a cover section that at least partially covers the main overflow hole, and the movable portion is at least in a reduced configuration at the cover section, so that the An annular conducting cavity communicating with the main overflow hole is formed between the covering section and the valve needle sleeve.
  • the outer diameter of the covering segment is D f2
  • the inner diameter of the needle sleeve cavity is D S
  • the distance between the end face of the cover section away from the main valve port and the end face of the valve needle sleeve away from the main valve port is L P , and 0.8 ⁇ L p /D S ⁇ 1.7.
  • the valve needle assembly includes a valve needle, the valve needle is sleeved in the needle sleeve cavity, the valve needle is movably adjustable along the length direction of the valve needle sleeve, and the valve needle The needle tip is at least partially arranged in the main valve port.
  • the present application also proposes a medium circulation pipeline, wherein the medium circulation pipeline includes an electronic expansion valve, and the electronic expansion valve includes:
  • valve seat forming a main valve cavity
  • the valve needle assembly includes a valve needle sleeve sleeved in the main valve cavity, the valve needle sleeve has a needle sleeve cavity, one end wall of the needle sleeve cavity is formed with a main valve port, and the main valve port includes a The first diversion hole section, the second diversion hole section, and the rectification hole section between the first diversion hole section and the second diversion hole section are distributed in the direction toward the outer end of the main valve port, so The rectification hole section is connected with the first guide hole section, and the diameter of the rectification hole section is larger than the diameter of the first guide hole section, so that the rectification hole section and the first guide hole section are connected.
  • the inner walls are arranged in steps.
  • the application also proposes an air conditioner system, the air conditioner system includes a medium circulation pipeline, the medium circulation pipeline includes an electronic expansion valve, and the electronic expansion valve includes:
  • valve seat forming a main valve cavity
  • the valve needle assembly includes a valve needle sleeve sleeved in the main valve cavity, the valve needle sleeve has a needle sleeve cavity, one end wall of the needle sleeve cavity is formed with a main valve port, and the main valve port includes a The first diversion hole section, the second diversion hole section, and the rectification hole section between the first diversion hole section and the second diversion hole section are distributed in the direction toward the outer end of the main valve port, so The rectification hole section is connected with the first guide hole section, and the diameter of the rectification hole section is larger than the diameter of the first guide hole section, so that the rectification hole section and the first guide hole section are connected.
  • the inner walls are arranged in steps.
  • the valve seat is formed with a main valve cavity
  • the valve needle is sleeved in the main valve cavity
  • one end wall of the needle sleeve cavity is formed with a main valve port
  • the main valve The port includes a first guide hole section, a second guide hole section, and a rectification hole between the first guide hole section and the second guide hole section distributed along the direction toward the outer end of the main valve port
  • the rectification hole section and the inner wall surface of the first guide hole section are arranged in steps.
  • the turbulent flow is locally formed in the section corresponding to the step, and the turbulent flow at this time will guide the flow of the refrigerant flowing through the middle of the main valve port, which plays the role of flexible flow diversion and improves the refrigerant flow at the main valve port.
  • the flow state effectively reduces the noise of the refrigerant.
  • FIG. 1 is a schematic cross-sectional structural diagram of a first embodiment of an electronic expansion valve provided by the application;
  • Fig. 2 is the sectional structure schematic diagram of valve needle sleeve and valve needle assembly in Fig. 1;
  • Fig. 3 is the sectional structure schematic diagram of the valve needle sleeve in Fig. 1;
  • Fig. 4 is the sectional structure schematic diagram of the valve needle in Fig. 1;
  • FIG. 5 is a schematic cross-sectional structural diagram of a second embodiment of the electronic expansion valve provided by the application.
  • Fig. 6 is the sectional structure schematic diagram of the valve needle sleeve and the valve needle assembly in Fig. 5;
  • Fig. 7 is the sectional structure schematic diagram of the valve needle sleeve in Fig. 5;
  • FIG. 8 is a schematic cross-sectional structural diagram of the valve needle in FIG. 5 .
  • FIGS. 1 to 8 are schematic structural diagrams of embodiments of the electronic expansion valve provided by the present application.
  • the electronic expansion valve 100 includes a valve seat 1 and a valve needle assembly 2 , the valve seat 1 is formed with a main valve cavity 11 , and the valve needle assembly 2 includes a valve sleeve sleeved on the main valve
  • the valve needle sleeve 21 in the cavity 11, the valve needle sleeve 21 has a needle sleeve cavity 211, and one end wall of the needle sleeve cavity 211 is formed with a main valve port 212, the main valve port 212 includes a direction toward the main valve.
  • the first guide hole section 2121, the second guide hole section 2122, and the rectification hole section 2123 between the first guide hole section 2121 and the second guide hole section 2122 are distributed in the direction of the outer end of the port 212.
  • the rectification hole section 2123 is connected with the first guide hole section 2121, and the diameter of the rectification hole section 2123 is larger than the diameter of the first guide hole section 2121, so that the rectification hole section 2123 and the The inner wall surfaces of the first guide hole section 2121 are arranged in steps.
  • the valve seat 1 is formed with a main valve cavity 11
  • the valve needle sleeve 21 is sleeved in the main valve cavity 11
  • a main valve is formed on one end wall of the needle sleeve cavity 211 Port 212
  • the main valve port 212 includes a first guide hole section 2121, a second guide hole section 2122, and a first guide hole section distributed along the direction toward the outer end of the main valve port 212.
  • the rectification hole section 2123 between 2121 and the second guide hole section 2122, the rectification hole section 2123 and the inner wall of the first guide hole section 2121 are arranged in steps, and the electronic expansion valve 100 is working
  • a turbulent flow will locally form in the rectification hole section 2123 corresponding to the step, and the turbulent flow at this time will be directed to flow through the central position of the main valve port 212.
  • the flow of the refrigerant plays the role of flexible diversion, improves the flow state of the refrigerant at the main valve port 212, and effectively reduces the noise of the refrigerant.
  • valve needle assembly 2 further includes a valve needle 22 , the valve needle sleeve 21 is arranged in the needle sleeve cavity 211 , and the valve needle 22 is movable along the length direction of the valve needle sleeve 21 .
  • the needle tip 221 of the valve needle 22 is at least partially set in the main valve port 212 , and the needle sleeve cavity is adjusted by controlling the movement of the valve needle 22 along the length direction of the valve needle sleeve 21 . 211 and the main valve port 212, and then conduct the main valve cavity 11 and the main valve port 212 to realize the pressure of the liquid in the main valve cavity 11 and the main valve port 212. change.
  • the electronic expansion valve 100 further includes a driving mechanism for driving the valve needle 22, the driving mechanism includes a rotor structure, a stator structure, a screw driving structure, a rotation-stop structure, etc.
  • the driving mechanism includes a rotor structure, a stator structure, a screw driving structure, a rotation-stop structure, etc.
  • the above structures cooperate with each other to realize the valve
  • the needle 22 is movably adjustable along the length direction of the valve needle sleeve 21.
  • the drive mechanism is used in the electronic expansion valve 100 in the prior art, which will not be described in detail here.
  • the sealing structure in the expansion valve 100 is used in the electronic expansion valve 100 in the prior art, and will not be described in detail here.
  • the liquid flows in or out from the side of the electronic expansion valve 100, corresponding to the axial outflow or inflow from the electronic expansion valve 100, in order to reduce the refrigerant in the entire flow path Noise, in the embodiments of the present application, the related structures on the lateral flow path are improved, and the related structures on the vertical flow path are also improved.
  • the main purpose is to optimize the structure of the main valve port 212, as described above, between the first guide hole section 2121 and the second guide hole section 2122
  • the addition of the rectification hole section 2123 plays the role of flexible flow diversion, improves the flow state of the refrigerant at the main valve port 212, and effectively reduces the noise of the refrigerant. It should be noted that the number of the rectification hole sections 2123 Without limitation, one, two or more can be set.
  • each hole segment of the main valve port 212 also affects the refrigerant noise.
  • the first guide hole segment The hole diameter of 2121 is D
  • the diameter of the rectifying hole section 2123 is D 1 , and D 1 /D ⁇ 2.
  • the flow of the refrigerant should be fully considered, and on the other hand, a certain amount of cooling medium should be formed at the corresponding steps.
  • the liquid diversion vortex ring considering the above factors comprehensively, D 1 /D ⁇ 2, can significantly reduce the noise of the refrigerant and has a good effect.
  • valve needle 22 restricts the inner profile of the fluid flowing in or out from the main valve port 212 , and the inner sidewall of the main valve port 212 restricts the edge of the fluid flowing in or out from the main valve port 212 Both of the above-mentioned two have a great influence on the flow of refrigerant.
  • the valve needle assembly 2 further includes a valve needle 22 arranged in the valve needle sleeve 21.
  • the valve needle The needle tip portion 221 of the The length of the rectifier hole segment 2123 is L 2 , the length of the second guide hole segment 2122 is L 3 , and L 1 +L 2 +L 3 ⁇ L ⁇ 1.5(L 1 + L 2 +L 3 ), the length of the needle tip portion 221 of the valve needle 22 is too short to achieve a good guiding effect, and the length of the needle tip portion 221 of the valve needle 22 is too long, which will increase the difficulty of processing, increase cost.
  • the end of the valve needle sleeve 21 corresponding to the main valve port 212 is protruded outside the main valve cavity 11 to form a protruding portion 213
  • the electronic expansion valve 100 further includes a vertical pipe 3.
  • One end of the vertical pipe 3 is externally connected to the protruding portion 213, the inner diameter of the vertical pipe 3 is D L , the inner diameter of the port of the main valve port 212 is D 2 , and 0.1 ⁇ (D L ⁇ D 2 )/D 2 ⁇ 0.4, if the ratio is too small, the guiding effect will not be achieved; if the ratio is too large, the guiding effect will be too strong, and a strong secondary flow will be formed before the second shrinking guiding section, 0.1 ⁇ (D L -D 2 )/D 2 ⁇ 0.4 can not only play a better guiding role, but also weaken the secondary flow, and has a better guiding effect.
  • the diameter of the rectifying hole segment 2123 is D 1 , and 0.65 ⁇ D 1 /D 2 ⁇ 0.85, within this range, between the second guide hole segment 2122 and the rectifying hole segment 2123 The refrigerant flow is stable.
  • the outer side surface of the protruding portion 213 is arranged in steps and faces the main valve port 212 .
  • the protruding portion 213 includes a first protruding section 2131 with a larger outer diameter and a second protruding section 2132 with a smaller outer diameter, which are connected in sequence.
  • a protruding section 2131 is formed, and a liquid retention gap 31 is formed between the second protruding section 2132 and the vertical pipe 3 .
  • the refrigerant in the liquid retention gap 31 will be guided to flow through the vertical pipe 3
  • the refrigerant flows at the inner wall of the valve, which plays the role of flexible diversion, improves the flow state of the refrigerant at the main valve port 212, reduces the friction between the refrigerant and the protruding portion 213, and improves the electronic expansion valve. 100 refrigerant noise.
  • the inner diameter of the second guide hole section 2122 is gradually increased, and the port of the second guide hole section 2122 is arranged to gradually increase in inner diameter.
  • the inner wall surface is connected with the outer surface of the second protruding section 2132 , which further reduces the friction between the refrigerant and the protruding section 213 and improves the refrigerant noise of the electronic expansion valve 100 .
  • the size of the liquid retention gap 31 is also a factor affecting the noise of the refrigerant.
  • the length of the first protruding section 2131 is L 4
  • the length of the second protruding section 2132 is L 5
  • 0.4 ⁇ L 4 /L 5 ⁇ 0.85 within the range of this size relationship, the improvement of the refrigerant noise of the electronic expansion valve 100 is obvious, and has a good effect.
  • the dimensional relationship between the inner wall structure of the main valve port 212 and the structure of the outer surface of the protruding portion 213 will also affect the refrigerant noise.
  • the length of the rectifying hole section 2123 is L 2.
  • the depth of the second guide hole section 2122 is L 3 , and 0.4 ⁇ (L 2 +L 3 )/(L 4 +L 5 ) ⁇ 0.85, within the range of this size relationship, the electronic expansion is improved
  • the refrigerant noise of the valve 100 is obvious and has a better effect.
  • the inner side wall of the needle sleeve cavity 211 is provided with a main overflow hole 214 that communicates with the main valve cavity 11.
  • the needle sleeve cavity 211 and the main valve cavity 11 are communicated with the main valve cavity 11 through the main overflow hole 214.
  • the electronic expansion valve 100 further includes a transverse pipe 4 that communicates with the main valve cavity 11 , and the transverse pipe 4 extends along the radial direction of the valve needle sleeve 21 and faces the main valve port 212 .
  • the main overflow hole 214 and the cross pipe 4 are staggered, so that the impact of the kinetic energy of the refrigerant on the flow of the refrigerant is reduced, so that the refrigerant is introduced from the cross pipe 4 and fills the main pipe 4.
  • the valve cavity 11 After the valve cavity 11, it enters the needle sleeve cavity 211 from the main overflow hole 214, or the refrigerant enters the main valve cavity 11 from the needle sleeve cavity 211,
  • the horizontal pipe 4 is led out, which reduces the flow rate of the refrigerant impacting the valve needle 22 and improves reliability and durability.
  • main overflow holes 214 are provided, and are arranged at intervals along the circumferential direction of the main valve cavity 11 to ensure the refrigerant flow between the main valve cavity 11 and the needle sleeve cavity 211 sex.
  • the inner diameter of the needle sleeve cavity 211 is D S
  • the diameter of the main overflow hole 214 is d
  • 1.8mm ⁇ d ⁇ 0.71D S within the range of this size relationship, the electronic The refrigerant noise of the expansion valve 100 is obvious and has a good effect.
  • the lower edge of the main overflow hole 214 can be set at a position adjacent to the bottom wall of the main valve cavity 11 .
  • the valve needle 22 includes a movable portion 222 sealed and slidably mounted in the valve needle sleeve 21 , and a needle tip portion connected to the movable portion 222 and at least partially disposed in the main valve port 212 221.
  • the movable portion 222 has a cover section 2221 that at least partially covers the main overflow hole 214, and the movable section 222 is reduced in size at least at the cover section 2221, so that the cover section 2221 and the An annular conducting cavity 5 that communicates with the main overflow hole 214 is formed between the valve needle sleeves 21 , and the covered part of the main overflow hole 214 is conducted through the annular conducting cavity 5 to reduce the influence on the flow of refrigerant , the efficiency of the electronic expansion valve 100 is improved.
  • the outer diameter of the covering section 2221 is D f2
  • the inner diameter of the needle sleeve cavity 211 is D S
  • the distance between the end face of the cover section 2221 away from the main valve port 212 and the end face of the valve needle sleeve 21 away from the main valve port 212 is L P , and 0.8 ⁇ L p /D S ⁇ 1.7, reducing the vibration of the valve needle 22 caused by the impact of the refrigerant, improving the refrigerant noise of the electronic expansion valve 100 is obvious, and having a good effect.
  • the present application also proposes a refrigerant circulation pipeline, the refrigerant circulation pipeline includes an electronic expansion valve 100, the refrigerant circulation pipeline includes all the technical features of the electronic expansion valve 100, and therefore has the advantages brought by all the above technical features. The technical effects will not be repeated here.
  • the present application also proposes an air conditioner system.
  • the air conditioner system includes a refrigerant circulation line, and the refrigerant circulation line includes an electronic expansion valve 100.
  • the air conditioner system includes all the technical features of the above refrigerant circulation line. Therefore, there are technical effects brought about by all the above technical features, which will not be repeated here.

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Abstract

一种电子膨胀阀，包括阀座（1）以及阀针组件（2），阀座（1）形成有主阀腔（11），阀针组件（2）包括套设于主阀腔（11）内的阀针套（21），阀针套（21）具有针套腔（211），针套腔（211）的一端壁形成有主阀口（212），主阀口（212）包括第一导流孔段（2121）、第二导流孔段（2122）、以及整流孔段（2123），整流孔段（2123）与第一导流孔段（2121）连接，整流孔段（2123）的孔径大于第一导流孔段（2121）的孔径，以使整流孔段（2123）与第一导流孔段（2121）的内壁面之间呈台阶设置。以及一种冷媒循环管路及空调器系统。这种电子膨胀阀工作时在整流孔段内对应的台阶处局部形成湍流，改善了主阀口处冷媒的流动状态，降低了冷媒噪音。

Description

电子膨胀阀、冷媒循环管路及空调器系统
优先权信息
本申请要求于2020年9月18日申请的、申请号为202010991712.X以及202022064983.9的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子膨胀阀技术领域，特别涉及一种电子膨胀阀、冷媒循环管路及空调器系统。
背景技术
目前电子膨胀阀使用过程中有较强冷媒音，空调厂商在使用这样的电子膨胀阀时通常需要在节流前后增加过渡管或者毛细管，一方面降噪效果不明显且不具有通用性，另一方面增加了管路的复杂性，管路空间增大，焊点增多，泄漏风险增大，此外将导致生产效率降低，增加制造成本，因此，需要优化电子膨胀阀的结构。
发明内容
本申请的主要目的是提出一种电子膨胀阀、冷媒循环管路及空调器系统，旨在优化电子膨胀阀的结构，以改善电子膨胀阀的冷媒音。
为实现上述目的，本申请提出一种电子膨胀阀，包括：
阀座，形成有主阀腔；以及，
阀针组件，包括套设于所述主阀腔内的阀针套，所述阀针套具有针套腔，所述针套腔的一端壁形成有主阀口，所述主阀口包括沿朝向所述主阀口外端的方向上分布的第一导流孔段、第二导流孔段、以及处于所述第一导流孔段与第二导流孔段之间的整流孔段，所述整流孔段与所述第一导流孔段连接，所述整流孔段的孔径大于所述第一导流孔段的孔径，以使所述整流孔段与所 述第一导流孔段的内壁面之间呈台阶设置。
在一实施例中，所述第一导流孔段的孔径为D，所述整流孔段的孔径为D 1，且D 1/D≥2。
在一实施例中，所述阀针组件还包括设于所述阀针套内的阀针，所述阀针的针尖部至少部分设于所述主阀口内，所述针尖部的端面与所述针套腔的底壁面之间的间距为L；
所述第一导流孔段的长度为L 1，所述整流孔段的长度为L 2，所述第二导流孔段的长度为L 3，且L 1+L 2+L 3≤L≤1.5(L 1+L 2+L 3)。
在一实施例中，所述阀针套对应形成所述主阀口的端部突设于所述主阀腔外，以形成突设部；
所述电子膨胀阀还包括竖接管，所述竖接管的一端外套接于所述突设部，所述竖接管的内径为D L；
所述主阀口的端口内径为D 2，且0.1≤(D L-D 2)/D 2≤0.4。
在一实施例中，所述整流孔段的孔径为D 1，0.65≤D 1/D 2≤0.85。
在一实施例中，所述突设部的外侧面呈台阶设置，朝向所述主阀口外端的方向上，所述突设部包括依次连接且外径较大的第一突设段以及外径较小的第二突设段；
所述竖接管外套接于所述第一突设段，且所述第二突设段与所述竖接管之间形成驻液间隙。
在一实施例中，朝向所述主阀口外端的方向上，所述第二导流孔段的内径呈逐渐增大设置，所述第二导流孔段的端口处的内壁面与所述第二突设段的外侧面相连。
在一实施例中，所述第一突设段的长度为L 4，所述第二突设段的长度为L 5，且0.4≤L 4/L 5≤0.85。
在一实施例中，所述整流孔段的长为L 2，所述第二导流孔段的深度为L 3，且0.4≤(L 2+L 3)/(L 4+L 5)≤0.85。
在一实施例中，所述针套腔的内侧壁设有连通所述主阀腔的主溢流孔。
在一实施例中，所述电子膨胀阀还包括与所述主阀腔连通的横接管，所述横接管沿所述阀针套的径向延伸设置；
朝向所述主阀口外端的方向上，所述主溢流孔与所述横接管呈错开设置。
在一实施例中，所述主溢流孔中心线与所述阀针套的径向平面之间形成夹角为β，且30°≤β≤60°。
在一实施例中，β＝45°。
在一实施例中，所述针套腔的内径为D S；
所述主溢流孔的孔径为d，且1.8mm<d<0.71D S。
在一实施例中，所述主溢流孔设置多个，且沿所述主阀腔的周向上间隔设置。
在一实施例中，所述阀针组件还包括设于所述阀针套内的阀针，所述阀针包括密封且滑动安装于所述阀针套内的活动部，以及连接所述活动部且至少部分设于所述主阀口内的针尖部，所述活动部具有至少部分遮盖所述主溢流孔的遮盖段，所述活动部至少在所述遮盖段处呈缩小设置，以使所述遮盖段与所述阀针套之间形成连通所述主溢流孔的环形导通腔。
在一实施例中，所述遮盖段的外径为D f2，所述针套腔的内径为D S，且0.8<D f2/D S<0.98。
在一实施例中，所述遮盖段远离所述主阀口的一端端面至所述阀针套远离所述主阀口一端的端面之间的间距为L P，且0.8≤L p/D S≤1.7。
在一实施例中，所述阀针组件包括阀针，所述阀针套设于所述针套腔内，所述阀针沿所述阀针套的长度方向可活动调节，所述阀针的针尖部至少部分设于所述主阀口内。
本申请还提出一种媒循环管路，所述媒循环管路包括电子膨胀阀，所述电子膨胀阀包括：
阀座，形成有主阀腔；以及，
阀针组件，包括套设于所述主阀腔内的阀针套，所述阀针套具有针套腔，所述针套腔的一端壁形成有主阀口，所述主阀口包括沿朝向所述主阀口外端的方向上分布的第一导流孔段、第二导流孔段、以及处于所述第一导流孔段与第二导流孔段之间的整流孔段，所述整流孔段与所述第一导流孔段连接，所述整流孔段的孔径大于所述第一导流孔段的孔径，以使所述整流孔段与所述第一导流孔段的内壁面之间呈台阶设置。
本申请还提出一种空调器系统，所述空调器系统包括媒循环管路，所述媒循环管路包括电子膨胀阀，所述电子膨胀阀包括：
阀座，形成有主阀腔；以及，
阀针组件，包括套设于所述主阀腔内的阀针套，所述阀针套具有针套腔，所述针套腔的一端壁形成有主阀口，所述主阀口包括沿朝向所述主阀口外端的方向上分布的第一导流孔段、第二导流孔段、以及处于所述第一导流孔段与第二导流孔段之间的整流孔段，所述整流孔段与所述第一导流孔段连接，所述整流孔段的孔径大于所述第一导流孔段的孔径，以使所述整流孔段与所述第一导流孔段的内壁面之间呈台阶设置。
本申请提供的技术方案中，所述阀座形成有主阀腔，所述阀针套套设于所述主阀腔内，所述针套腔的一端壁形成有主阀口，所述主阀口包括沿朝向所述主阀口外端的方向上分布的第一导流孔段、第二导流孔段、以及处于所述第一导流孔段与第二导流孔段之间的整流孔段，所述整流孔段与所述第一导流孔段的内壁面之间呈台阶设置，所述电子膨胀阀在工作时，冷媒流经所述整流孔段时，会在所述整流孔段内对应所述台阶处局部形成湍流，此时的湍流会导向流经所述主阀口的中部位置处的冷媒流动，起到柔性导流的作用，改善了所述主阀口处冷媒的流动状态，有效降低了冷媒噪音。
附图说明
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。
图1为本申请提供的电子膨胀阀的第一实施例的剖视结构示意图；
图2为图1中阀针套与阀针装配的剖视结构示意图；
图3为图1中阀针套的剖视结构示意图；
图4为图1中阀针的剖视结构示意图；
图5为本申请提供的电子膨胀阀的第二实施例的剖视结构示意图；
图6为图5中阀针套与阀针装配的剖视结构示意图；
图7为图5中阀针套的剖视结构示意图；
图8为图5中阀针的剖视结构示意图。
附图标号说明：
标号 名称 标号 名称
100 电子膨胀阀 2131 第一突设段
1 阀座 2132 第二突设段
11 主阀腔 214 主溢流孔
2 阀针组件 22 阀针
21 阀针套 221 针尖部
211 针套腔 222 活动部
212 主阀口 2221 遮盖段
2121 第一导流孔段 3 竖接管
2122 第二导流孔段 31 驻液间隙
2123 整流孔段 4 横接管
213 突设部 5 环形导通腔
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。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，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。
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。
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，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。
目前电子膨胀阀使用过程中有较强冷媒音，空调厂商在使用这样的电子膨胀阀时通常需要在节流前后增加过渡管或者毛细管，一方面降噪效果不明显且不具有通用性，另一方面增加了管路的复杂性，管路空间增大，焊点增多，泄漏风险增大，此外将导致生产效率降低，增加制造成本，因此，需要优化电子膨胀阀的结构。
鉴于此，本申请提出一种电子膨胀阀，其中，图1至图8为本申请提供的电子膨胀阀的实施例的结构示意图。
请参阅图1至图4，所述电子膨胀阀100包括阀座1以及阀针组件2，所述阀座1形成有主阀腔11，所述阀针组件2包括套设于所述主阀腔11内的阀针套21，所述阀针套21具有针套腔211，所述针套腔211的一端壁形成有主阀口212，所述主阀口212包括沿朝向所述主阀口212外端的方向上分布的第一导流孔段2121、第二导流孔段2122、以及处于所述第一导流孔段2121与第二导流孔段2122之间的整流孔段2123，所述整流孔段2123与所述第一导流孔段2121连接，所述整流孔段2123的孔径大于所述第一导流孔段2121的孔径，以使所述整流孔段2123与所述第一导流孔段2121的内壁面之间呈台阶设置。
本申请提供的技术方案中，所述阀座1形成有主阀腔11，所述阀针套21套设于所述主阀腔11内，所述针套腔211的一端壁形成有主阀口212，所述主阀口212包括沿朝向所述主阀口212外端的方向上分布的第一导流孔段2121、第二导流孔段2122、以及处于所述第一导流孔段2121与第二导流孔段2122之间的整流孔段2123，所述整流孔段2123与所述第一导流孔段2121的内壁面之间呈台阶设置，所述电子膨胀阀100在工作时，冷媒流经所述整流孔段2123时，会在所述整流孔段2123内对应所述台阶处局部形成湍流，此时的湍流会导向流经所述主阀口212的中部位置处的冷媒流动，起到柔性导流的作用，改善了 所述主阀口212处冷媒的流动状态，有效降低了冷媒噪音。
需要说明的是，所述阀针组件2还包括阀针22，所述阀针套21设于所述针套腔211内，所述阀针22沿所述阀针套21的长度方向可活动调节，所述阀针22的针尖部221至少部分设于所述主阀口212内，通过控制所述阀针22沿所述阀针套21的长度方向的活动，以调节所述针套腔211与所述主阀口212之间的间隙，进而来导通所述主阀腔11与所述主阀口212，实现所述主阀腔11与所述主阀口212内的液体的压强的改变。
另外，所述电子膨胀阀100还包括驱动所述阀针22的驱动机构，所述驱动机构包括转子结构、定子结构、螺纹驱动结构以及止转结构等，上述的结构相互配合，实现所述阀针22沿所述阀针套21的长度方向可活动调节，需要说明的是，所述驱动机构在现有技术的电子膨胀阀100中有使用，此处不作详细叙述，另外，整个所述电子膨胀阀100内的密封结构在现有技术的电子膨胀阀100中有使用，此处也不作详细叙述。
在所述电子膨胀阀100的流路中，液体从所述电子膨胀阀100的侧向流入或者流出，对应从所述电子膨胀阀100的轴向流出或者流入，为了减少在整个流路上的冷媒噪音，本申请的实施例中，对处在横向流路上的相关结构作改进，也对竖向流路上的相关结构进行改进。
在对竖向流路上的结构改进中，主要是针对所述主阀口212的结构的优化，如上述的在所述第一导流孔段2121和所述第二导流孔段2122之间增加所述整流孔段2123，起到柔性导流的作用，改善了所述主阀口212处冷媒的流动状态，有效降低了冷媒噪音，需要说明的是，所述整流孔段2123的个数不作限制，可以是设置一个、两个或者多个。
以下仅以只包含有一个所述整流孔段2123来说明，所述主阀口212各个孔段之间的尺寸关联关系也影响着冷媒噪音，一实施例中，所述第一导流孔段2121的孔径为D，所述整流孔段2123的孔径为D 1，且D 1/D≥2，一方面，要充分考虑到冷媒的流动，另一方面也需要在对应的台阶处形成一定的液体导流涡环，综合考虑上述因素，D 1/D≥2，可以明显降低冷媒噪音，具有较好的效果。
所述阀针22限制了自所述主阀口212流入或者流出的流体中部位置的内型线，所述主阀口212的内侧壁限制了自所述主阀口212流入或者流出的流 体边缘位置的外型线，上述两者都对冷媒的流动有较大影响，一实施例中，所述阀针组件2还包括设于所述阀针套21内的阀针22，所述阀针22的针尖部221至少部分设于所述主阀口212内，所述针尖部221的端面与所述针套腔211的底壁面之间的间距为L，所述第一导流孔段2121的长度为L 1，所述整流孔段2123的长度为L 2，所述第二导流孔段2122的长度为L 3，且L 1+L 2+L 3≤L≤1.5(L 1+L 2+L 3)，所述阀针22的针尖部221的长度过短，起不到较好的导流作用，所述阀针22的针尖部221的长度过长，会增加加工难度，增加成本。
一实施例中，所述阀针套21对应形成所述主阀口212的端部突设于所述主阀腔11外，以形成突设部213，所述电子膨胀阀100还包括竖接管3，所述竖接管3的一端外套接于所述突设部213，所述竖接管3的内径为D L，所述主阀口212的端口内径为D 2，且0.1≤(D L-D 2)/D 2≤0.4，比值过小起不到导向效果，比值过大则导向效果过强，会在第二收缩导向段前形成较强二次流，0.1≤(D L-D 2)/D 2≤0.4既能起到较好的导向作用，又可以减弱二次流，具有较好的导流效果。
一实施例中，所述整流孔段2123的孔径为D 1，0.65≤D 1/D 2≤0.85，在此范围内，所述第二导流孔段2122与所述整流孔段2123之间冷媒导流平稳。
请参阅图4至图8中本申请提供的电子膨胀阀的第二实施例的结构示意图，在此实施例中，所述突设部213的外侧面呈台阶设置，朝向所述主阀口212外端的方向上，所述突设部213包括依次连接且外径较大的第一突设段2131以及外径较小的第二突设段2132，所述竖接管3外套接于所述第一突设段2131，且所述第二突设段2132与所述竖接管3之间形成驻液间隙31，此时的所述驻液间隙31内的冷媒会导向流经所述竖接管3的内壁位置处的冷媒流动，起到柔性导流的作用，改善了所述主阀口212处冷媒的流动状态，减少了冷媒与所述突设部213的摩擦，改善了所述电子膨胀阀100的冷媒噪音。
进一步地，一实施例中，朝向所述主阀口212外端的方向上，所述第二导流孔段2122的内径呈逐渐增大设置，所述第二导流孔段2122的端口处的内壁面与所述第二突设段2132的外侧面相连，进一步地减少了冷媒与所述突设部213的摩擦，改善了所述电子膨胀阀100的冷媒噪音。
所述驻液间隙31的尺寸也是影响冷媒噪音的因素，一实施例中，所述第 一突设段2131的长度为L 4，所述第二突设段2132的长度为L 5，且0.4≤L 4/L 5≤0.85，在此尺寸关系范围内，改善所述电子膨胀阀100的冷媒噪音较明显，具有较好的效果。
另外，所述主阀口212的内壁结构与所述突设部213的外侧面的结构之间的尺寸关系也会影响着冷媒噪音，一实施例中，所述整流孔段2123的长为L 2，所述第二导流孔段2122的深度为L 3，且0.4≤(L 2+L 3)/(L 4+L 5)≤0.85，在此尺寸关系范围内，改善所述电子膨胀阀100的冷媒噪音较明显，具有较好的效果。
所述针套腔211的内侧壁设有连通所述主阀腔11的主溢流孔214，所述针套腔211与所述主阀腔11通过所述主溢流孔214相连通，一实施例中，所述电子膨胀阀100还包括与所述主阀腔11连通的横接管4，所述横接管4沿所述阀针套21的径向延伸设置，朝向所述主阀口212外端的方向上，所述主溢流孔214与所述横接管4呈错开设置，如此，减少冷媒的冲击动能对冷媒流动的影响，使得冷媒自所述横接管4导入，并充满所述主阀腔11后，自所述主溢流孔214进入所述针套腔211内，或者冷媒自所述针套腔211进入所述主阀腔11，充满所述主阀腔11后，自所述横接管4导出，降低冲击阀针22冷媒的流速，提升可靠性和耐久性。
需要说明的是，所述主溢流孔214设置多个，且沿所述主阀腔11的周向上间隔设置，保证了所述主阀腔11与所述针套腔211之间的冷媒流动性。
为避免冷媒直接冲击阀针22，导致的异常冷媒音，一实施例中，所述主溢流孔214中心线与所述阀针套21的径向平面之间形成夹角为β，且30°≤β≤60°，一个较优的值是β＝45°，如此，在保证冷媒的流速的状况下，尽可能地减少冷媒直接冲击阀针22，进一步地降低冷媒噪音。
一实施例中，所述针套腔211的内径为D S，所述主溢流孔214的孔径为d，且1.8mm<d<0.71D S，在此尺寸关系范围内，改善所述电子膨胀阀100的冷媒噪音较明显，具有较好的效果，另外，可以将所述主溢流孔214的下边缘设置于邻近所述主阀腔11的底壁的位置。
为了减小阀针套21与阀套间的晃动，二者之间的间隙很小。但是溢流孔增大后，全闭状态下阀针套21会挡住一部分溢流孔，导致流态受阻，一实施例中，所述阀针组件2还包括设于所述阀针套21内的阀针22，所述阀针22 包括密封且滑动安装于所述阀针套21内的活动部222，以及连接所述活动部222且至少部分设于所述主阀口212内的针尖部221，所述活动部222具有至少部分遮盖所述主溢流孔214的遮盖段2221，所述活动部222至少在所述遮盖段2221处呈缩小设置，以使所述遮盖段2221与所述阀针套21之间形成连通所述主溢流孔214的环形导通腔5，通过所述环形导通腔5将遮盖的部分所述主溢流孔214导通，减少对冷媒流动的影响，提高了所述电子膨胀阀100的效率。
具体地，一实施例中，所述遮盖段2221的外径为D f2，所述针套腔211的内径为D S，且0.8<D f2/D S<0.98，在此尺寸关系范围内，改善了冷媒的流动状态。
一实施例中，所述遮盖段2221远离所述主阀口212的一端端面至所述阀针套21远离所述主阀口212一端的端面之间的间距为L P，且0.8≤L p/D S≤1.7，减小冷媒冲击导致的阀针22震颤，改善所述电子膨胀阀100的冷媒噪音较明显，具有较好的效果。
本申请还提出一种冷媒循环管路，所述冷媒循环管路包括电子膨胀阀100，所述冷媒循环管路包括上述电子膨胀阀100的全部技术特征，也因此具有上述全部技术特征带来的技术效果，此处不再一一赘述。
本申请还提出一种空调器系统，所述空调器系统包括冷媒循环管路，所述冷媒循环管路包括电子膨胀阀100，所述空调器系统包括上述冷媒循环管路的全部技术特征，也因此具有上述全部技术特征带来的技术效果，此处不再一一赘述。
以上所述仅为本申请的优选实施例，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。

Claims (21)

  1. 一种电子膨胀阀，其中，所述电子膨胀阀包括：
    阀座，形成有主阀腔；以及，
    阀针组件，包括套设于所述主阀腔内的阀针套，所述阀针套具有针套腔，所述针套腔的一端壁形成有主阀口，所述主阀口包括沿朝向所述主阀口外端的方向上分布的第一导流孔段、第二导流孔段、以及处于所述第一导流孔段与第二导流孔段之间的整流孔段，所述整流孔段与所述第一导流孔段连接，所述整流孔段的孔径大于所述第一导流孔段的孔径，以使所述整流孔段与所述第一导流孔段的内壁面之间呈台阶设置。
  2. 如权利要求1所述的电子膨胀阀，其中，所述第一导流孔段的孔径为D，所述整流孔段的孔径为D 1，且D 1/D≥2。
  3. 如权利要求1所述的电子膨胀阀，其中，所述阀针组件还包括设于所述阀针套内的阀针，所述阀针的针尖部至少部分设于所述主阀口内，所述针尖部的端面与所述针套腔的底壁面之间的间距为L；
    所述第一导流孔段的长度为L 1，所述整流孔段的长度为L 2，所述第二导流孔段的长度为L 3，且L 1+L 2+L 3≤L≤1.5(L 1+L 2+L 3)。
  4. 如权利要求1所述的电子膨胀阀，其中，所述阀针套对应形成所述主阀口的端部突设于所述主阀腔外，以形成突设部；
    所述电子膨胀阀还包括竖接管，所述竖接管的一端外套接于所述突设部，所述竖接管的内径为D L；
    所述主阀口的端口内径为D 2，且0.1≤(D L-D 2)/D 2≤0.4。
  5. 如权利要求4所述的电子膨胀阀，其中，所述整流孔段的孔径为D 1，0.65≤D 1/D 2≤0.85。
  6. 如权利要求4所述的电子膨胀阀，其中，所述突设部的外侧面呈台阶 设置，朝向所述主阀口外端的方向上，所述突设部包括依次连接且外径较大的第一突设段以及外径较小的第二突设段；
    所述竖接管外套接于所述第一突设段，且所述第二突设段与所述竖接管之间形成驻液间隙。
  7. 如权利要求6所述的电子膨胀阀，其中，朝向所述主阀口外端的方向上，所述第二导流孔段的内径呈逐渐增大设置，所述第二导流孔段的端口处的内壁面与所述第二突设段的外侧面相连。
  8. 如权利要求6所述的电子膨胀阀，其中，所述第一突设段的长度为L 4，所述第二突设段的长度为L 5，且0.4≤L 4/L 5≤0.85。
  9. 如权利要求4所述的电子膨胀阀，其中，所述整流孔段的长为L 2，所述第二导流孔段的深度为L 3，且0.4≤(L 2+L 3)/(L 4+L 5)≤0.85。
  10. 如权利要求1所述的电子膨胀阀，其中，所述针套腔的内侧壁设有连通所述主阀腔的主溢流孔。
  11. 如权利要求10所述的电子膨胀阀，其中，所述电子膨胀阀还包括与所述主阀腔连通的横接管，所述横接管沿所述阀针套的径向延伸设置；
    朝向所述主阀口外端的方向上，所述主溢流孔与所述横接管呈错开设置。
  12. 如权利要求10所述的电子膨胀阀，其中，所述主溢流孔中心线与所述阀针套的径向平面之间形成夹角为β，且30°≤β≤60°。
  13. 如权利要求12所述的电子膨胀阀，其中，β＝45°。
  14. 如权利要求10所述的电子膨胀阀，其中，所述针套腔的内径为D S；
    所述主溢流孔的孔径为d，且1.8mm<d<0.71D S。
  15. 如权利要求10所述的电子膨胀阀，其中，所述主溢流孔设置多个，且沿所述主阀腔的周向上间隔设置。
  16. 如权利要求10所述的电子膨胀阀，其中，所述阀针组件还包括设于所述阀针套内的阀针，所述阀针包括密封且滑动安装于所述阀针套内的活动部，以及连接所述活动部且至少部分设于所述主阀口内的针尖部，所述活动部具有至少部分遮盖所述主溢流孔的遮盖段，所述活动部至少在所述遮盖段处呈缩小设置，以使所述遮盖段与所述阀针套之间形成连通所述主溢流孔的环形导通腔。
  17. 如权利要求16所述的电子膨胀阀，其中，所述遮盖段的外径为D f2，所述针套腔的内径为D S，且0.8<D f2/D S<0.98。
  18. 如权利要求17所述的电子膨胀阀，其中，所述遮盖段远离所述主阀口的一端端面至所述阀针套远离所述主阀口一端的端面之间的间距为L P，且0.8≤L p/D S≤1.7。
  19. 如权利要求1所述的电子膨胀阀，其中，所述阀针组件包括阀针，所述阀针套设于所述针套腔内，所述阀针沿所述阀针套的长度方向可活动调节，所述阀针的针尖部至少部分设于所述主阀口内。
  20. 一种冷媒循环管路，其中，包括如权利要求1至19任意一项所述的电子膨胀阀。
  21. 一种空调器系统，其中，包括如权利要求20所述的冷媒循环管路。
PCT/CN2021/106390 2020-09-18 2021-07-15 电子膨胀阀、冷媒循环管路及空调器系统 WO2022057421A1 (zh)

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