WO2023143024A1 - Electronic expansion valve - Google Patents

Electronic expansion valve Download PDF

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Publication number
WO2023143024A1
WO2023143024A1 PCT/CN2023/071383 CN2023071383W WO2023143024A1 WO 2023143024 A1 WO2023143024 A1 WO 2023143024A1 CN 2023071383 W CN2023071383 W CN 2023071383W WO 2023143024 A1 WO2023143024 A1 WO 2023143024A1
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WO
WIPO (PCT)
Prior art keywords
section
diameter
transition
valve
core assembly
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PCT/CN2023/071383
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French (fr)
Chinese (zh)
Inventor
贺宇辰
刘曈晖
徐冠军
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浙江盾安人工环境股份有限公司
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Publication of WO2023143024A1 publication Critical patent/WO2023143024A1/en

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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
    • 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
    • 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 valves, in particular, to an electronic expansion valve.
  • the valve port of the electronic expansion valve includes a plurality of connected flow sections, but generally adjacent flow sections have different diameters at the connections, that is, there is a stepped surface at the connection of the flow sections.
  • the present application provides an electronic expansion valve to solve the problem in the prior art that the fluid forms a vortex at the valve port.
  • the application provides an electronic expansion valve, including: a valve core assembly; a valve seat, the valve seat has a housing chamber, the valve core assembly is movably arranged in the housing chamber, a valve port is provided on the valve seat, and the valve port includes sequential The connected first cylindrical section and a plurality of transition sections, the first cylindrical section is arranged close to the valve core assembly, each transition section has a head end and an end oppositely arranged, the head end of the transition section is arranged close to the valve core assembly, and the plurality of transition sections
  • the diameter of the head end of the transition section connected to the first cylindrical section is the same as the diameter of the first cylindrical section, and the diameter of the head end of each transition section is smaller than the diameter of the end of the transition section, and the adjacent transition section is close to the valve.
  • the end of the transition section of the spool assembly has the same diameter as the head end of the transition section away from the spool assembly.
  • a plurality of transition sections are arranged between the first cylindrical section and the second cylindrical section, the diameter of the head end of each transition section is smaller than the diameter of the end of the transition section, and the adjacent two transition sections
  • the end diameters of the connecting ends of the valves are set to be the same, so that the step surface can be eliminated, and the flow velocity of the fluid can be changed slowly when the fluid circulates in the valve port, so that the fluid can flow smoothly and the noise of the fluid flow can be reduced.
  • valve port also includes a second cylindrical section, the second cylindrical section is connected to an end of the transition section away from the valve core assembly, and the end diameter of the transition section connected to the second cylindrical section among the plurality of transition sections is the same as that of the second cylindrical section.
  • the segments have the same diameter.
  • each transition section is a tapered section, and the cone angles of the multiple transition sections gradually decrease toward a direction away from the valve core assembly.
  • the transition section is set as a tapered section, so that the side wall of the transition section is smooth, so that the flow velocity of the fluid can be changed slowly when the fluid flows in the transition section, thereby further reducing the noise and flow resistance of the fluid flow.
  • the plurality of transition sections include a first conical section, the first conical section is connected to the first cylindrical section, and the taper angle of the first conical section is ⁇ , 180°> ⁇ >90°. If the setting is 180°> ⁇ >90°, the fluid will not form a vortex at the end of the first cylindrical section away from the valve core assembly, and the overall length of the valve port can be reduced.
  • the diameter of the first cylindrical section is d
  • the diameter of the end of the first tapered section is d1
  • 4d ⁇ d1 ⁇ 1.1d If the setting is 4d ⁇ d1 ⁇ 1.1d, the flow velocity of the fluid in the valve port can be changed evenly, so that the fluid can flow smoothly and the noise generated by the fluid can be further reduced.
  • the plurality of transition sections include a second tapered section, the second tapered section is arranged at the end of the first tapered section away from the valve core assembly, the cone angle of the second tapered section is ⁇ , 50°> ⁇ 25°. If it is set to 50°> ⁇ 25°, the overall length of the valve port can be made smaller, and the fluid noise can be made smaller.
  • the length of the first cylindrical section is L, and 5mm>L ⁇ 0.5mm. If the setting is 5mm>L ⁇ 0.5mm, the valve core assembly can better seal the first cylindrical section and the overall volume of the valve seat can be reduced.
  • the bottom of the valve seat is provided with a connecting protrusion, and part of the valve port runs through the connecting protrusion, and the difference between the inner diameter and the outer diameter of the end of the connecting protrusion away from the valve port is A, 0.8mm ⁇ A ⁇ 0.3 mm.
  • the setting of 0.8mm ⁇ A ⁇ 0.3mm can not only make the structural strength of the connecting raised part better, but also prevent the fluid from swirling at the end surface of the connecting raised part.
  • the electronic expansion valve further includes a connecting pipe, which is sheathed on the outside of the connecting protruding part, and there is a welding gap between the end of the connecting protruding part and the inner wall of the connecting pipe.
  • the welding slit is provided to facilitate the welding of the inner wall of the connecting pipe and the outer wall of the connecting boss.
  • a fluid opening is provided on the side of the valve seat, and the fluid opening communicates with the accommodating chamber.
  • the fluid opening and the valve port serve as the inlet and outlet of the fluid, respectively.
  • Figure 1 shows a schematic structural view of the electronic expansion valve provided by the present application
  • Figure 2 shows a schematic structural view of the electronic expansion valve provided by the present application
  • Fig. 3 shows a schematic diagram of the fluid flow direction of the electronic expansion valve provided by the present application.
  • valve seat 11, fluid opening; 20, valve port; 21, first cylindrical section; 22, second cylindrical section; 23, first conical section; 24, second conical section; 30, raised part ; 40, connecting pipe; 50, welding gap.
  • the embodiment of the present application provides an electronic expansion valve, including a valve core assembly and a valve seat 10 .
  • the valve seat 10 has an accommodating chamber, the valve core assembly is movably arranged in the accommodating chamber, the valve seat 10 is provided with a valve port 20, the valve port 20 includes a first cylindrical section 21 and a plurality of transition sections connected in sequence, the first The cylindrical section 21 is arranged close to the spool assembly, each transition section has a head end and an end set oppositely, the head end of the transition section is arranged close to the spool assembly, and the transition section connected to the first cylindrical section 21 among the plurality of transition sections
  • the diameter of the head end is the same as the diameter of the first cylindrical section 21, and the diameter of the head end of each transition section is smaller than the diameter of the end of the transition section, and the diameter of the end of the transition section near the valve core assembly in the adjacent transition sections
  • the head ends of the transition sections of the spool assembly have the same diameter.
  • the valve core assembly can be used to block or open the valve port 20 .
  • the arrows in FIG. 3 indicate the schematic diagram of fluid flow in the valve port 20 .
  • the electronic expansion valve also includes a valve casing, which is connected to the valve seat 10 , and there is an accommodation cavity between the valve casing and the valve seat 10 .
  • the valve port 20 includes a first cylindrical section 21 connected in sequence and a plurality of transition sections, and the diameter of the transition section connected to the first cylindrical section 21 is the same as the diameter of the first cylindrical section 21 , the diameter of the head end of each transition section is smaller than the diameter of the end of the transition section, and the end diameters of the connecting ends of two adjacent transition sections are set to be the same, so that the step surface can be canceled and the flow velocity of the fluid in the valve port is slow The change can make the fluid flow smoothly and reduce the noise of fluid flow.
  • the valve port further includes a second cylindrical section 22, the second cylindrical section 22 is connected to an end of the transition section away from the valve core assembly, and the transition section connected to the second cylindrical section 22 among the multiple transition sections
  • the tip diameter is the same as the diameter of the second cylindrical section 22 . Setting the second cylindrical section 22 can extend the length of the valve port, so that it is convenient to connect other structures at the valve port.
  • the diameter of the head end of the transition section connected to the first cylindrical section 21 is the same as the diameter of the first cylindrical section 21, so that a step surface between the first cylindrical section 21 and the transition section can be avoided, thereby avoiding fluid A vortex is formed at the junction of the first cylindrical section 21 and the transition section, thereby making the flow resistance of the fluid smaller and the noise less;
  • the end diameter of the transition section connected with the second cylindrical section 22 is the same as the The diameters are the same, avoiding a step surface between the transition section and the second cylindrical section 22, thereby preventing the fluid from forming a vortex at the junction of the transition section and the second cylindrical section 22, thereby enabling the fluid to have less flow resistance and less noise.
  • the diameter of the end of the transition section close to the valve core assembly in the adjacent transition sections is the same as the diameter of the head end of the transition section away from the valve core assembly, which can prevent the fluid from forming a vortex at the connection of the adjacent transition sections, thereby The flow resistance of the fluid is small and the noise is small.
  • each transition section is a tapered section, and the cone angles of the multiple transition sections gradually decrease toward a direction away from the valve core assembly.
  • the transition section is set as a tapered section, so that the side wall of the transition section is smooth, so that the flow velocity of the fluid can be changed slowly when the fluid flows in the transition section, thereby further reducing the noise and flow resistance of the fluid flow.
  • the cone angles of the plurality of transition sections gradually decrease toward the direction away from the valve core assembly, so that the cross-sectional area of the inner side walls of the plurality of transition sections in the direction away from the valve core assembly becomes slower and slower, so that further Make the fluid flow smoothly in the valve port, thereby reducing the noise of fluid flow.
  • a plurality of transition sections include a first conical section 23, the first conical section 23 is connected to the first cylindrical section 21, the cone angle of the first conical section 23 is ⁇ , 180°> ⁇ >90 °. If ⁇ is 180°, the first tapered section 23 is not conical, and the fluid will form a vortex at the end of the first cylindrical section 21 away from the valve core assembly, which increases the fluid noise and flow resistance; if ⁇ 90°, Then the cross-sectional area of the first tapered section 23 changes slowly from the head end to the end, and the cone angle of the transition section located at the end of the first tapered section 23 away from the valve core assembly is too small, thus requiring the transition section of each transition section
  • the length is longer to meet the structural design of the valve port 20, which increases the overall length of the valve port 20; therefore, it is set to 180°> ⁇ >90°, that is, the fluid can be kept away from the valve core assembly in the first cylindrical section 21 A vortex will not be formed at one end of the valve port, and
  • the diameter of the first cylindrical section 21 is d
  • the diameter of the end of the first tapered section 23 is d1, 4d ⁇ d1 ⁇ 1.1d. If d1 ⁇ 1.1d, the diameter difference between the end of the first tapered section 23 and the diameter of the first cylindrical section 21 is small, and the length of the first tapered section 23 is relatively small, so that other transition sections need to be longer , so that the cross-sectional area of the transition section toward the direction away from the valve core assembly increases at an uneven rate, thereby causing the fluid flow rate to change unevenly; if d1>4d, the diameter of the end of the first tapered section 23 is the same as that of the second The difference in diameter of the cylindrical section 22 is small, resulting in a relatively small length of the second tapered section 24 and other transition sections, which also causes the cross-sectional area of the transition section toward the direction away from the valve core assembly to increase at an uneven rate, thereby causing The flow velocity of the fluid varies unevenly; therefore, setting 4d ⁇ d1 ⁇ 1.1d
  • the plurality of transition sections include a second tapered section 24, the second tapered section 24 is arranged at an end of the first tapered section 23 away from the valve core assembly, and the cone angle of the second tapered section 24 is ⁇ , 50°> ⁇ 25°.
  • ⁇ is less than 25°, the length of the second tapered section 24 is longer, resulting in a larger overall length of the valve port 20, which increases the volume of the valve seat 10; if ⁇ 50°, the cone angles of other transition sections Both are large, resulting in short lengths of the transition sections, resulting in a faster change in the cross-sectional area of multiple transition sections, which in turn makes the fluid flow rate change faster and makes the fluid noise louder; therefore, it is set to 50°> ⁇ 25°, not only can make the overall length of the valve port 20 smaller, but also can make the fluid noise smaller. Specifically, in this embodiment, ⁇ may be 25°, 35° or 45°.
  • the length of the first cylindrical segment 21 is L, and 5mm>L ⁇ 0.5mm. If L ⁇ 0.5mm, the matching area between the inner side wall of the first cylindrical section 21 and the valve core assembly is small, so that the effect of the valve core assembly blocking the first cylindrical section 21 is poor; if L ⁇ 5mm, then the first cylindrical section 21
  • the length of a cylindrical section 21 is longer, so that the overall length of the valve port 20 is longer, which in turn leads to a larger overall volume of the valve seat 10, which increases the space occupied by the electronic expansion valve; therefore, it is set to 5mm>L ⁇ 0.5mm , that is, the valve core assembly can better block the first cylindrical section 21 , and the overall volume of the valve seat 10 can be made smaller.
  • L may be 0.5mm, 2mm or 4.5mm.
  • the bottom of the valve seat 10 is provided with a connecting raised portion 30, part of the valve port 20 penetrates through the connecting raised portion 30, and the difference between the inner diameter and the outer diameter of the end of the connecting raised portion 30 away from the valve port 20 is It is A, 0.8mm ⁇ A ⁇ 0.3mm.
  • A may be 0.3mm, 0.5mm or 0.8mm.
  • the electronic expansion valve further includes a connecting pipe 40 sleeved on the outside of the connecting protruding portion 30 , and there is a welding gap 50 between the end of the connecting protruding portion 30 and the inner wall of the connecting pipe 40 .
  • the fluid flows through the valve port 20 and enters the connecting pipe 40 .
  • the welding gap 50 is provided to facilitate the welding of the inner wall of the connecting pipe 40 and the outer wall of the connecting protrusion 30 .
  • a fluid opening 11 is provided on the side of the valve seat 10, and the fluid opening 11 communicates with the containing chamber.
  • the fluid opening 11 and the valve port 20 serve as the inlet and outlet of the fluid respectively.
  • orientation words such as “front, back, up, down, left, right", “horizontal, vertical, vertical, horizontal” and “top, bottom” etc. indicate the orientation Or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description. In the absence of a contrary statement, these orientation words do not indicate or imply the device or element referred to It must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the protection scope of the present application; the orientation words “inner and outer” refer to the inner and outer relative to the outline of each component itself.
  • spatially relative terms may be used here, such as “on !, “over !, “on the surface of !, “above”, etc., to describe The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as “above” or “above” other devices or configurations would then be oriented “beneath” or “above” the other devices or configurations. under other devices or configurations”. Thus, the exemplary term “above” can encompass both an orientation of “above” and “beneath”. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

Abstract

An electronic expansion valve, comprising: a valve core assembly; and a valve seat (10). The valve seat (10) is provided with an accommodating cavity, and the valve core assembly is movably disposed in the accommodating cavity; the valve seat (10) is provided with a valve port (20), and the valve port (20) comprises a first cylindrical section (21) and a plurality of transition sections which are connected in sequence; the first cylindrical section (21) is disposed close to the valve core assembly; each transition section has a head end and a tail end disposed opposite to each other, and the head end of the transition section is disposed close to the valve core assembly; the diameter of the head end of the transition section connected to the first cylindrical section (21) in the plurality of transition sections is the same as the diameter of the first cylindrical section (21), and the diameter of the head end of each transition section is less than the diameter of the tail end of the transition section; the diameter of the tail end of the transition section close to the valve core assembly in two adjacent transition sections is the same as the diameter of the head end of the transition section distant from the valve core assembly. By adoption of the present technical solution, the problem in the prior art that a fluid forms a vortex at a valve port is solved.

Description

电子膨胀阀Electronic expansion valve
本申请要求于2022年01月26日提交至中国国家知识产权局，申请号为202220236777.8、发明名称为“电子膨胀阀”的专利申请的优先权。This application claims the priority of the patent application with the application number 202220236777.8 and the invention name "electronic expansion valve" submitted to the State Intellectual Property Office of China on January 26, 2022.
技术领域technical field
本申请涉及阀技术领域，具体而言，涉及一种电子膨胀阀。The present application relates to the technical field of valves, in particular, to an electronic expansion valve.
背景技术Background technique
现有技术中，电子膨胀阀的阀口包括相连接的多个流通段，但是一般相邻的流通段在连接处的直径不同，即在流通段的连接处具有台阶面。在实际使用时，流体从阀腔向阀口流动时，易在阀口处形成漩涡，造成流体流动的噪音较大，且漩涡使流体的流阻增大，降低了流体的流速。In the prior art, the valve port of the electronic expansion valve includes a plurality of connected flow sections, but generally adjacent flow sections have different diameters at the connections, that is, there is a stepped surface at the connection of the flow sections. In actual use, when the fluid flows from the valve chamber to the valve port, a vortex is likely to be formed at the valve port, causing the noise of the fluid flow to be large, and the vortex increases the flow resistance of the fluid and reduces the flow velocity of the fluid.
实用新型内容Utility model content
本申请提供一种电子膨胀阀，以解决现有技术中的流体在阀口处形成漩涡的问题。The present application provides an electronic expansion valve to solve the problem in the prior art that the fluid forms a vortex at the valve port.
本申请提供了一种电子膨胀阀，包括：阀芯组件；阀座，阀座具有容纳腔，阀芯组件可移动地设置在容纳腔内，阀座上设置有阀口，阀口包括顺次连接的第一圆柱段和多个过渡段，第一圆柱段靠近阀芯组件设置，每个过渡段具有相对设置的首端和末端，过渡段的首端靠近阀芯组件设置，多个过渡段中与第一圆柱段相连接的过渡段的首端直径与第一圆柱段的直径相同，且每个过渡段的首端的直径小于该过渡段的末端的直径，相邻的过渡段中靠近阀芯组件的过渡段的末端的直径与远离阀芯组件的过渡段的首端的直径相同。The application provides an electronic expansion valve, including: a valve core assembly; a valve seat, the valve seat has a housing chamber, the valve core assembly is movably arranged in the housing chamber, a valve port is provided on the valve seat, and the valve port includes sequential The connected first cylindrical section and a plurality of transition sections, the first cylindrical section is arranged close to the valve core assembly, each transition section has a head end and an end oppositely arranged, the head end of the transition section is arranged close to the valve core assembly, and the plurality of transition sections The diameter of the head end of the transition section connected to the first cylindrical section is the same as the diameter of the first cylindrical section, and the diameter of the head end of each transition section is smaller than the diameter of the end of the transition section, and the adjacent transition section is close to the valve. The end of the transition section of the spool assembly has the same diameter as the head end of the transition section away from the spool assembly.
应用本申请的技术方案，在第一圆柱段和第二圆柱段之间设置多个过渡段，每个过渡段的首端的直径小于该过渡段的末端的直径，并将相邻两个过渡段的连接端的端部直径设置相同，如此能够取消台阶面，使流体在阀口内流通时流速缓慢变化，进而能够使流体平稳流动，降低流体流动的噪音。Applying the technical solution of the present application, a plurality of transition sections are arranged between the first cylindrical section and the second cylindrical section, the diameter of the head end of each transition section is smaller than the diameter of the end of the transition section, and the adjacent two transition sections The end diameters of the connecting ends of the valves are set to be the same, so that the step surface can be eliminated, and the flow velocity of the fluid can be changed slowly when the fluid circulates in the valve port, so that the fluid can flow smoothly and the noise of the fluid flow can be reduced.
进一步地，阀口还包括第二圆柱段，第二圆柱段与过渡段的远离阀芯组件的一端连接，多个过渡段中与第二圆柱段相连接的过渡段的末端直径与第二圆柱段的直径相同。Further, the valve port also includes a second cylindrical section, the second cylindrical section is connected to an end of the transition section away from the valve core assembly, and the end diameter of the transition section connected to the second cylindrical section among the plurality of transition sections is the same as that of the second cylindrical section. The segments have the same diameter.
进一步地，每个过渡段为锥形段，且多个过渡段的锥角朝远离阀芯组件的方向逐渐减小。将过渡段设置为锥形段，使过渡段的侧壁平滑，从而能够使流体在过渡段流动时流速缓慢变化，从而进一步降低了流体流动的噪音和流阻。Further, each transition section is a tapered section, and the cone angles of the multiple transition sections gradually decrease toward a direction away from the valve core assembly. The transition section is set as a tapered section, so that the side wall of the transition section is smooth, so that the flow velocity of the fluid can be changed slowly when the fluid flows in the transition section, thereby further reducing the noise and flow resistance of the fluid flow.
进一步地，多个过渡段包括第一锥形段，第一锥形段与第一圆柱段连接，第一锥形段的锥角为α，180°＞α＞90°。设置为180°＞α＞90°，即能够使流体在第一圆柱段的远离阀芯组件的一端不会形成漩涡，又能够使阀口的整体长度较小。Further, the plurality of transition sections include a first conical section, the first conical section is connected to the first cylindrical section, and the taper angle of the first conical section is α, 180°>α>90°. If the setting is 180°>α>90°, the fluid will not form a vortex at the end of the first cylindrical section away from the valve core assembly, and the overall length of the valve port can be reduced.
进一步地，第一圆柱段的直径为d，第一锥形段的末端的直径为d1，4d≥d1≥1.1d。设置为4d≥d1≥1.1d，能够使流体在阀口内的流通速度均匀变化，从而使流体平稳流动，进一步降低流体产生的噪音。Further, the diameter of the first cylindrical section is d, the diameter of the end of the first tapered section is d1, 4d≥d1≥1.1d. If the setting is 4d≥d1≥1.1d, the flow velocity of the fluid in the valve port can be changed evenly, so that the fluid can flow smoothly and the noise generated by the fluid can be further reduced.
进一步地，多个过渡段包括第二锥形段，第二锥形段设置在第一锥形段的远离阀芯组件的一端，第二锥形段的锥角为β，50°＞β≥25°。设置为50°＞β≥25°，即能够使阀口的整体长度较小，又能够使流体噪音较小。Further, the plurality of transition sections include a second tapered section, the second tapered section is arranged at the end of the first tapered section away from the valve core assembly, the cone angle of the second tapered section is β, 50°>β≥ 25°. If it is set to 50°>β≥25°, the overall length of the valve port can be made smaller, and the fluid noise can be made smaller.
进一步地，第一圆柱段的长度为L，5mm＞L≥0.5mm。设置为5mm＞L≥0.5mm，即能够使阀芯组件较好地封堵第一圆柱段，又能够使阀座的整体体积较小。Further, the length of the first cylindrical section is L, and 5mm>L≥0.5mm. If the setting is 5mm>L≥0.5mm, the valve core assembly can better seal the first cylindrical section and the overall volume of the valve seat can be reduced.
进一步地，阀座底部设置有连接凸起部，部分阀口贯穿连接凸起部，连接凸起部的远离阀口的端部的内径与外径的差值为A，0.8mm≥A≥0.3mm。设置为0.8mm≥A≥0.3mm，既能够使连接凸起部的结构强度较好，且能够避免流体在连接凸起部的端面处产生漩涡。Further, the bottom of the valve seat is provided with a connecting protrusion, and part of the valve port runs through the connecting protrusion, and the difference between the inner diameter and the outer diameter of the end of the connecting protrusion away from the valve port is A, 0.8mm≥A≥0.3 mm. The setting of 0.8mm≥A≥0.3mm can not only make the structural strength of the connecting raised part better, but also prevent the fluid from swirling at the end surface of the connecting raised part.
进一步地，电子膨胀阀还包括连接管，连接管套设在连接凸起部的外侧，连接凸起部的端部与连接管的内壁之间具有焊接缝隙。设置焊接缝隙，能够便于将连接管的内壁和连接凸起部的外壁焊接在一起。Further, the electronic expansion valve further includes a connecting pipe, which is sheathed on the outside of the connecting protruding part, and there is a welding gap between the end of the connecting protruding part and the inner wall of the connecting pipe. The welding slit is provided to facilitate the welding of the inner wall of the connecting pipe and the outer wall of the connecting boss.
进一步地，阀座的侧面设置有流体开口，流体开口与容纳腔连通。流体开口和阀口分别作为流体的进口和出口。Further, a fluid opening is provided on the side of the valve seat, and the fluid opening communicates with the accommodating chamber. The fluid opening and the valve port serve as the inlet and outlet of the fluid, respectively.
附图说明Description of drawings
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute an improper limitation of the present application. In the attached picture:
图1示出了本申请提供的电子膨胀阀的结构示意图；Figure 1 shows a schematic structural view of the electronic expansion valve provided by the present application;
图2示出了本申请提供的电子膨胀阀的结构示意图；Figure 2 shows a schematic structural view of the electronic expansion valve provided by the present application;
图3示出了本申请提供的电子膨胀阀的流体流动方向的示意图。Fig. 3 shows a schematic diagram of the fluid flow direction of the electronic expansion valve provided by the present application.
其中，上述附图包括以下附图标记：Wherein, the above-mentioned accompanying drawings include the following reference signs:
10、阀座；11、流体开口；20、阀口；21、第一圆柱段；22、第二圆柱段；23、第一锥形段；24、第二锥形段；30、凸起部；40、连接管；50、焊接缝隙。10, valve seat; 11, fluid opening; 20, valve port; 21, first cylindrical section; 22, second cylindrical section; 23, first conical section; 24, second conical section; 30, raised part ; 40, connecting pipe; 50, welding gap.
具体实施方式Detailed ways
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何 限制。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the application, its application or uses. 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.
如图1至图3所示，本申请实施例提供一种电子膨胀阀，包括阀芯组件和阀座10。阀座10具有容纳腔，阀芯组件可移动地设置在容纳腔内，阀座10上设置有阀口20，阀口20包括顺次连接的第一圆柱段21和多个过渡段，第一圆柱段21靠近阀芯组件设置，每个过渡段具有相对设置的首端和末端，过渡段的首端靠近阀芯组件设置，多个过渡段中与第一圆柱段21相连接的过渡段的首端直径与第一圆柱段21的直径相同，且每个过渡段的首端的直径小于该过渡段的末端的直径，相邻的过渡段中靠近阀芯组件的过渡段的末端的直径与远离阀芯组件的过渡段的首端的直径相同。通过设置阀芯组件可以用于封堵或打开阀口20。图3中的箭头表示流体在阀口20内的流动示意图。电子膨胀阀还包括阀壳，阀壳与阀座10连接，阀壳与阀座10之间具有容纳腔。As shown in FIGS. 1 to 3 , the embodiment of the present application provides an electronic expansion valve, including a valve core assembly and a valve seat 10 . The valve seat 10 has an accommodating chamber, the valve core assembly is movably arranged in the accommodating chamber, the valve seat 10 is provided with a valve port 20, the valve port 20 includes a first cylindrical section 21 and a plurality of transition sections connected in sequence, the first The cylindrical section 21 is arranged close to the spool assembly, each transition section has a head end and an end set oppositely, the head end of the transition section is arranged close to the spool assembly, and the transition section connected to the first cylindrical section 21 among the plurality of transition sections The diameter of the head end is the same as the diameter of the first cylindrical section 21, and the diameter of the head end of each transition section is smaller than the diameter of the end of the transition section, and the diameter of the end of the transition section near the valve core assembly in the adjacent transition sections The head ends of the transition sections of the spool assembly have the same diameter. The valve core assembly can be used to block or open the valve port 20 . The arrows in FIG. 3 indicate the schematic diagram of fluid flow in the valve port 20 . The electronic expansion valve also includes a valve casing, which is connected to the valve seat 10 , and there is an accommodation cavity between the valve casing and the valve seat 10 .
应用本申请的技术方案，阀口20包括顺次连接的第一圆柱段21和多个过渡段，与第一圆柱段21相连接的过渡段的首端直径与第一圆柱段21的直径相同，每个过渡段的首端的直径小于该过渡段的末端的直径，并将相邻两个过渡段的连接端的端部直径设置相同，如此能够取消台阶面，使流体在阀口内流通时流速缓慢变化，进而能够使流体平稳流动，降低流体流动的噪音。Applying the technical solution of the present application, the valve port 20 includes a first cylindrical section 21 connected in sequence and a plurality of transition sections, and the diameter of the transition section connected to the first cylindrical section 21 is the same as the diameter of the first cylindrical section 21 , the diameter of the head end of each transition section is smaller than the diameter of the end of the transition section, and the end diameters of the connecting ends of two adjacent transition sections are set to be the same, so that the step surface can be canceled and the flow velocity of the fluid in the valve port is slow The change can make the fluid flow smoothly and reduce the noise of fluid flow.
在本实施例中，阀口还包括第二圆柱段22，第二圆柱段22与过渡段的远离阀芯组件的一端连接，多个过渡段中与第二圆柱段22相连接的过渡段的末端直径与第二圆柱段22的直径相同。设置第二圆柱段22，能够延长阀口的长度，从而能够方便在阀口处连接其他结构。In this embodiment, the valve port further includes a second cylindrical section 22, the second cylindrical section 22 is connected to an end of the transition section away from the valve core assembly, and the transition section connected to the second cylindrical section 22 among the multiple transition sections The tip diameter is the same as the diameter of the second cylindrical section 22 . Setting the second cylindrical section 22 can extend the length of the valve port, so that it is convenient to connect other structures at the valve port.
具体地，将与第一圆柱段21相连接的过渡段的首端直径与第一圆柱段21的直径相同，这样可以避免第一圆柱段21和过渡段之间具有台阶面，从而避免了流体在第一圆柱段21和过渡段的连接处形成漩涡，进而能够使流体的流阻较小、噪音较小；与第二圆柱段22相连接的过渡段的末端直径与第二圆柱段22的直径相同，避免了过渡段和第二圆柱段22之间具有台阶面，从而避免了流体在过渡段和第二圆柱段22的连接处形成漩涡，进而能够使流体的流阻较小且噪音较小；相邻的过渡段中靠近阀芯组件的过渡段的末端的直径与远离阀芯组件的过渡段的首端的直径相同，这样能够避免流体在相邻的过渡段的连接处形成漩涡，从而使流体的流阻较小且噪音较小。Specifically, the diameter of the head end of the transition section connected to the first cylindrical section 21 is the same as the diameter of the first cylindrical section 21, so that a step surface between the first cylindrical section 21 and the transition section can be avoided, thereby avoiding fluid A vortex is formed at the junction of the first cylindrical section 21 and the transition section, thereby making the flow resistance of the fluid smaller and the noise less; the end diameter of the transition section connected with the second cylindrical section 22 is the same as the The diameters are the same, avoiding a step surface between the transition section and the second cylindrical section 22, thereby preventing the fluid from forming a vortex at the junction of the transition section and the second cylindrical section 22, thereby enabling the fluid to have less flow resistance and less noise. Small; the diameter of the end of the transition section close to the valve core assembly in the adjacent transition sections is the same as the diameter of the head end of the transition section away from the valve core assembly, which can prevent the fluid from forming a vortex at the connection of the adjacent transition sections, thereby The flow resistance of the fluid is small and the noise is small.
其中，过渡段的侧壁可以为斜面，也可以为弧面。在本实施例中，每个过渡段为锥形段，且多个过渡段的锥角朝远离阀芯组件的方向逐渐减小。将过渡段设置为锥形段，使过渡段的侧壁平滑，从而能够使流体在过渡段流动时流速缓慢变化，从而进一步降低了流体流动的噪音和流阻。多个过渡段的锥角朝远离阀芯组件的方向逐渐减小，这样，使朝远离阀芯组件的方向多个过渡段的内侧壁的横截面面积变大速度越来越慢，从而能够进一步使流体在阀口内平稳流动，进而降低了流体流动的噪音。Wherein, the side wall of the transition section may be a slope or an arc. In this embodiment, each transition section is a tapered section, and the cone angles of the multiple transition sections gradually decrease toward a direction away from the valve core assembly. The transition section is set as a tapered section, so that the side wall of the transition section is smooth, so that the flow velocity of the fluid can be changed slowly when the fluid flows in the transition section, thereby further reducing the noise and flow resistance of the fluid flow. The cone angles of the plurality of transition sections gradually decrease toward the direction away from the valve core assembly, so that the cross-sectional area of the inner side walls of the plurality of transition sections in the direction away from the valve core assembly becomes slower and slower, so that further Make the fluid flow smoothly in the valve port, thereby reducing the noise of fluid flow.
如图2所示，多个过渡段包括第一锥形段23，第一锥形段23与第一圆柱段21连接，第一锥形段23的锥角为α，180°＞α＞90°。若α为180°，则第一锥形段23不是圆锥形， 流体会在第一圆柱段21的远离阀芯组件的一端形成漩涡，增大了流体噪音和流阻；若α≤90°，则第一锥形段23从首端至末端的横截面积变化速度较慢，位于第一锥形段23的远离阀芯组件的一端的过渡段的锥角过小，从而需要各过渡段的长度较长以满足阀口20的结构设计，这样增大了阀口20的整体长度；因此，设置为180°＞α＞90°，即能够使流体在第一圆柱段21的远离阀芯组件的一端不会形成漩涡，又能够使阀口20的整体长度较小。在本实施例中，α可以设置为100°、120°、140°或170°。As shown in Figure 2, a plurality of transition sections include a first conical section 23, the first conical section 23 is connected to the first cylindrical section 21, the cone angle of the first conical section 23 is α, 180°>α>90 °. If α is 180°, the first tapered section 23 is not conical, and the fluid will form a vortex at the end of the first cylindrical section 21 away from the valve core assembly, which increases the fluid noise and flow resistance; if α≤90°, Then the cross-sectional area of the first tapered section 23 changes slowly from the head end to the end, and the cone angle of the transition section located at the end of the first tapered section 23 away from the valve core assembly is too small, thus requiring the transition section of each transition section The length is longer to meet the structural design of the valve port 20, which increases the overall length of the valve port 20; therefore, it is set to 180°>α>90°, that is, the fluid can be kept away from the valve core assembly in the first cylindrical section 21 A vortex will not be formed at one end of the valve port, and the overall length of the valve port 20 can be made smaller. In this embodiment, α can be set to 100°, 120°, 140° or 170°.
在本实施例中，第一圆柱段21的直径为d，第一锥形段23的末端的直径为d1，4d≥d1≥1.1d。若d1＜1.1d，则第一锥形段23的末端的直径与第一圆柱段21的直径相差较小，且第一锥形段23的长度较小，这样需要其他过渡段的长度较长，从而使朝向远离阀芯组件的方向过渡段的横截面积增大速度不均匀，进而使流体的流速变化不均匀；若d1＞4d，则第一锥形段23的末端的直径与第二圆柱段22的直径相差较小，导致第二锥形段24和其他过渡段的长度较小，这样也会导致朝向远离阀芯组件的方向过渡段的横截面积增大速度不均匀，进而使流体的流速变化不均匀；因此，设置为4d≥d1≥1.1d，能够使流体在阀口20内的流通速度均匀变化，从而使流体平稳流动，进一步降低流体产生的噪音。具体在本实施例中，可以为d1＝1.1d、d1＝2d或d1＝4d。In this embodiment, the diameter of the first cylindrical section 21 is d, the diameter of the end of the first tapered section 23 is d1, 4d≥d1≥1.1d. If d1<1.1d, the diameter difference between the end of the first tapered section 23 and the diameter of the first cylindrical section 21 is small, and the length of the first tapered section 23 is relatively small, so that other transition sections need to be longer , so that the cross-sectional area of the transition section toward the direction away from the valve core assembly increases at an uneven rate, thereby causing the fluid flow rate to change unevenly; if d1>4d, the diameter of the end of the first tapered section 23 is the same as that of the second The difference in diameter of the cylindrical section 22 is small, resulting in a relatively small length of the second tapered section 24 and other transition sections, which also causes the cross-sectional area of the transition section toward the direction away from the valve core assembly to increase at an uneven rate, thereby causing The flow velocity of the fluid varies unevenly; therefore, setting 4d≥d1≥1.1d can make the flow velocity of the fluid in the valve port 20 change uniformly, thereby making the fluid flow smoothly and further reducing the noise generated by the fluid. Specifically, in this embodiment, it may be d1=1.1d, d1=2d or d1=4d.
在本实施例中，多个过渡段包括第二锥形段24，第二锥形段24设置在第一锥形段23的远离阀芯组件的一端，第二锥形段24的锥角为β，50°＞β≥25°。若β小于25°，则第二锥形段24的长度较长，导致阀口20的整体长度较大，增大了阀座10的体积；若β≥50°，则其他过渡段的锥角均较大，导致过渡段的长度均较短，从而导致多个过渡段的横截面积变化速度较快，进而使流体的流速变化较快，使流体噪音较大；因此，设置为50°＞β≥25°，即能够使阀口20的整体长度较小，又能够使流体噪音较小。具体在本实施例中，β可以为25°、35°或45°。In this embodiment, the plurality of transition sections include a second tapered section 24, the second tapered section 24 is arranged at an end of the first tapered section 23 away from the valve core assembly, and the cone angle of the second tapered section 24 is β, 50°>β≥25°. If β is less than 25°, the length of the second tapered section 24 is longer, resulting in a larger overall length of the valve port 20, which increases the volume of the valve seat 10; if β≥50°, the cone angles of other transition sections Both are large, resulting in short lengths of the transition sections, resulting in a faster change in the cross-sectional area of multiple transition sections, which in turn makes the fluid flow rate change faster and makes the fluid noise louder; therefore, it is set to 50°> β≥25°, not only can make the overall length of the valve port 20 smaller, but also can make the fluid noise smaller. Specifically, in this embodiment, β may be 25°, 35° or 45°.
具体地，第一圆柱段21的长度为L，5mm＞L≥0.5mm。若L＜0.5mm，则第一圆柱段21的内侧壁与阀芯组件相配合的面积较小，从而使阀芯组件封堵第一圆柱段21的效果较差；若L≥5mm，则第一圆柱段21的长度较长，从而使阀口20的整体长度较长，进而导致阀座10的整体体积较大，增加了电子膨胀阀占用的空间；因此，设置为5mm＞L≥0.5mm，即能够使阀芯组件较好地封堵第一圆柱段21，又能够使阀座10的整体体积较小。具体在本实施例中，L可以为0.5mm、2mm或4.5mm。Specifically, the length of the first cylindrical segment 21 is L, and 5mm>L≥0.5mm. If L<0.5mm, the matching area between the inner side wall of the first cylindrical section 21 and the valve core assembly is small, so that the effect of the valve core assembly blocking the first cylindrical section 21 is poor; if L≥5mm, then the first cylindrical section 21 The length of a cylindrical section 21 is longer, so that the overall length of the valve port 20 is longer, which in turn leads to a larger overall volume of the valve seat 10, which increases the space occupied by the electronic expansion valve; therefore, it is set to 5mm>L≥0.5mm , that is, the valve core assembly can better block the first cylindrical section 21 , and the overall volume of the valve seat 10 can be made smaller. Specifically, in this embodiment, L may be 0.5mm, 2mm or 4.5mm.
在本实施例中，阀座10底部设置有连接凸起部30，部分阀口20贯穿连接凸起部30，连接凸起部30的远离阀口20的端部的内径与外径的差值为A，0.8mm≥A≥0.3mm。若A＜0.3mm，则连接凸起部30的远离阀口20的端部的厚度过小，从而导致连接凸起部30的强度较小；若A大于0.8mm，则连接凸起部30的远离阀口20的端面结构尺寸较大，当流体在连接凸起部30的端面处易产生漩涡，从而导致流体的流阻较大且噪音较大；因此，设置为0.8mm≥A≥0.3mm，既能够使连接凸起部30的结构强度较好，且能够避免流体在连接凸起部30的端面处产生漩涡。具体在本实施例中，A可以为0.3mm、0.5mm或0.8mm。In this embodiment, the bottom of the valve seat 10 is provided with a connecting raised portion 30, part of the valve port 20 penetrates through the connecting raised portion 30, and the difference between the inner diameter and the outer diameter of the end of the connecting raised portion 30 away from the valve port 20 is It is A, 0.8mm≥A≥0.3mm. If A<0.3mm, the thickness of the end portion of the connection protrusion 30 away from the valve port 20 is too small, resulting in a low strength of the connection protrusion 30; if A is greater than 0.8mm, the thickness of the connection protrusion 30 The structure size of the end face away from the valve port 20 is large, and when the fluid is prone to vortex at the end face connecting the raised part 30, resulting in a large flow resistance and high noise of the fluid; therefore, the setting is 0.8mm≥A≥0.3mm , not only can make the structural strength of the connecting raised portion 30 better, but also can prevent the fluid from swirling at the end surface of the connecting raised portion 30 . Specifically, in this embodiment, A may be 0.3mm, 0.5mm or 0.8mm.
在本实施例中，电子膨胀阀还包括连接管40，连接管40套设在连接凸起部30的外侧，连接凸起部30的端部与连接管40的内壁之间具有焊接缝隙50。流体流经阀口20后进入连接管40内。设置焊接缝隙50，能够便于将连接管40的内壁和连接凸起部30的外壁焊接在一起。In this embodiment, the electronic expansion valve further includes a connecting pipe 40 sleeved on the outside of the connecting protruding portion 30 , and there is a welding gap 50 between the end of the connecting protruding portion 30 and the inner wall of the connecting pipe 40 . The fluid flows through the valve port 20 and enters the connecting pipe 40 . The welding gap 50 is provided to facilitate the welding of the inner wall of the connecting pipe 40 and the outer wall of the connecting protrusion 30 .
具体地，阀座10的侧面设置有流体开口11，流体开口11与容纳腔连通。流体开口11和阀口20分别作为流体的进口和出口。Specifically, a fluid opening 11 is provided on the side of the valve seat 10, and the fluid opening 11 communicates with the containing chamber. The fluid opening 11 and the valve port 20 serve as the inlet and outlet of the fluid respectively.
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.
除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本申请的范围。同时，应当明白，为了便于描述，附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为授权说明书的一部分。在这里示出和讨论的所有示例中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它示例可以具有不同的值。应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as illustrative only, and not as limiting. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.
在本申请的描述中，需要理解的是，方位词如“前、后、上、下、左、右”、“横向、竖向、垂直、水平”和“顶、底”等所指示的方位或位置关系通常是基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，在未作相反说明的情况下，这些方位词并不指示和暗示所指的装置或元件必须具有特定的方位或者以特定的方位构造和操作，因此不能理解为对本申请保护范围的限制；方位词“内、外”是指相对于各部件本身的轮廓的内外。In the description of the present application, it should be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. indicate the orientation Or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description. In the absence of a contrary statement, these orientation words do not indicate or imply the device or element referred to It must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the protection scope of the present application; the orientation words "inner and outer" refer to the inner and outer relative to the outline of each component itself.
为了便于描述，在这里可以使用空间相对术语，如“在……之上”、“在……上方”、“在……上表面”、“上面的”等，用来描述如在图中所示的一个器件或特征与其他器件或特征的空间位置关系。应当理解的是，空间相对术语旨在包含除了器件在图中所描述的方位之外的在使用或操作中的不同方位。例如，如果附图中的器件被倒置，则描述为“在其他器件或构造上方”或“在其他器件或构造之上”的器件之后将被定位为“在其他器件或构造下方”或“在其他器件或构造之下”。因而，示例性术语“在……上方”可以包括“在……上方”和“在……下方”两种方位。该器件也可以其他不同方式定位(旋转90度或处于其他方位)，并且对这里所使用的空间相对描述作出相应解释。For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations”. Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.
此外，需要说明的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对相应零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本申请保护范围的限制。In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. To limit the protection scope of this application.
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

  1. 一种电子膨胀阀，其特征在于，包括：An electronic expansion valve, characterized in that it comprises:
    阀芯组件；Spool assembly;
    阀座(10)，所述阀座(10)具有容纳腔，所述阀芯组件可移动地设置在所述容纳腔内，所述阀座(10)上设置有阀口(20)，所述阀口(20)包括顺次连接的第一圆柱段(21)和多个过渡段，所述第一圆柱段(21)靠近所述阀芯组件设置，每个所述过渡段具有相对设置的首端和末端，所述过渡段的首端靠近所述阀芯组件设置，多个所述过渡段中与所述第一圆柱段(21)相连接的过渡段的首端直径与所述第一圆柱段(21)的直径相同，且每个所述过渡段的首端的直径小于该所述过渡段的末端的直径，相邻的所述过渡段中靠近所述阀芯组件的过渡段的末端的直径与远离所述阀芯组件的过渡段的首端的直径相同。A valve seat (10), the valve seat (10) has an accommodating cavity, the valve core assembly is movably arranged in the accommodating cavity, the valve seat (10) is provided with a valve port (20), the The valve port (20) includes a first cylindrical section (21) connected in sequence and a plurality of transition sections, the first cylindrical section (21) is arranged close to the valve core assembly, and each of the transition sections has an opposite setting The head end and the end of the transition section, the head end of the transition section is arranged close to the valve core assembly, and the diameter of the head end of the transition section connected to the first cylindrical section (21) among the plurality of transition sections is the same as the diameter of the transition section The diameter of the first cylindrical section (21) is the same, and the diameter of the head end of each transition section is smaller than the diameter of the end of the transition section, and the transition section near the valve core assembly in the adjacent transition section The diameter of the distal end is the same as the diameter of the head end of the transition section away from the valve core assembly.
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀口还包括第二圆柱段(22)，所述第二圆柱段(22)与所述过渡段的远离所述阀芯组件的一端连接，多个所述过渡段中与所述第二圆柱段(22)相连接的过渡段的末端直径与所述第二圆柱段(22)的直径相同。The electronic expansion valve according to claim 1, characterized in that, the valve port further includes a second cylindrical section (22), and the second cylindrical section (22) is connected to the transition section far away from the valve core assembly. The end diameter of the transition section connected to the second cylindrical section (22) among the plurality of transition sections is the same as the diameter of the second cylindrical section (22).
  3. 根据权利要求1所述的电子膨胀阀，其特征在于，每个所述过渡段为锥形段，且多个所述过渡段的锥角朝远离所述阀芯组件的方向逐渐减小。The electronic expansion valve according to claim 1, wherein each of the transition sections is a tapered section, and the cone angles of the plurality of transition sections gradually decrease toward a direction away from the valve core assembly.
  4. 根据权利要求1所述的电子膨胀阀，其特征在于，多个所述过渡段包括第一锥形段(23)，所述第一锥形段(23)与所述第一圆柱段(21)连接，所述第一锥形段(23)的锥角为α，180°＞α＞90°。The electronic expansion valve according to claim 1, characterized in that, the plurality of transition sections include a first conical section (23), and the first conical section (23) is connected to the first cylindrical section (21 ) connection, the cone angle of the first tapered section (23) is α, 180°>α>90°.
  5. 根据权利要求4所述的电子膨胀阀，其特征在于，所述第一圆柱段(21)的直径为d，所述第一锥形段(23)的末端的直径为d1，4d≥d1≥1.1d。The electronic expansion valve according to claim 4, characterized in that, the diameter of the first cylindrical section (21) is d, the diameter of the end of the first tapered section (23) is d1, 4d≥d1≥ 1.1d.
  6. 根据权利要求1所述的电子膨胀阀，其特征在于，多个所述过渡段包括第二锥形段(24)，所述第二锥形段(24)设置在所述第一锥形段(23)的远离所述阀芯组件的一端，所述第二锥形段(24)的锥角为β，50°＞β≥25°。The electronic expansion valve according to claim 1, characterized in that, the plurality of transition sections include a second tapered section (24), and the second tapered section (24) is arranged on the first tapered section At the end of (23) away from the valve core assembly, the taper angle of the second tapered section (24) is β, 50°>β≥25°.
  7. 根据权利要求1所述的电子膨胀阀，其特征在于，所述第一圆柱段(21)的长度为L，5mm＞L≥0.5mm。The electronic expansion valve according to claim 1, characterized in that, the length of the first cylindrical section (21) is L, 5mm>L≥0.5mm.
  8. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀座(10)底部设置有连接凸起部(30)，部分所述阀口(20)贯穿所述连接凸起部(30)，所述连接凸起部(30)的远离所述阀口(20)的端部的内径与外径的差值为A，0.8mm≥A≥0.3mm。The electronic expansion valve according to claim 1, characterized in that, the bottom of the valve seat (10) is provided with a connecting protrusion (30), and part of the valve port (20) passes through the connecting protrusion (30) ), the difference between the inner diameter and the outer diameter of the end of the connecting protrusion (30) away from the valve port (20) is A, 0.8mm≥A≥0.3mm.
  9. 根据权利要求8所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括连接管(40)，所述连接管(40)套设在所述连接凸起部(30)的外侧，所述连接凸起部(30)的端部与所述连接管(40)的内壁之间具有焊接缝隙(50)。The electronic expansion valve according to claim 8, characterized in that, the electronic expansion valve further comprises a connecting pipe (40), and the connecting pipe (40) is sheathed on the outside of the connecting protrusion (30), There is a welding gap (50) between the end of the connecting protrusion (30) and the inner wall of the connecting pipe (40).
  10. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀座(10)的侧面设置有流体开口(11)，所述流体开口(11)与所述容纳腔连通。The electronic expansion valve according to claim 1, characterized in that a fluid opening (11) is provided on the side of the valve seat (10), and the fluid opening (11) communicates with the accommodating chamber.
PCT/CN2023/071383 2022-01-26 2023-01-09 Electronic expansion valve WO2023143024A1 (en)

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CN202220236777.8 2022-01-26
CN202220236777.8U CN217736277U (en) 2022-01-26 2022-01-26 Electronic expansion valve

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CN217736277U (en) * 2022-01-26 2022-11-04 浙江盾安人工环境股份有限公司 Electronic expansion valve

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DE2842799A1 (en) * 1978-09-30 1980-04-10 Schell Kg Hubert Low noise angle valve - has conical seat with seal which lifts off to give annular passage when valve cone is raised
JP2004340260A (en) * 2003-05-15 2004-12-02 Saginomiya Seisakusho Inc Flow control valve
JP2007032863A (en) * 2005-07-22 2007-02-08 Tgk Co Ltd Expansion valve
CN102713383A (en) * 2010-08-20 2012-10-03 术富仪表设备制造有限公司 Control valve, in particular angle control valve and double control valve, also in the form of a straight-seat valve and inc.lined-seat valve for extreme control applications
CN103097836A (en) * 2010-09-24 2013-05-08 大金工业株式会社 Expansion valve
JP2019007550A (en) * 2017-06-23 2019-01-17 株式会社鷺宮製作所 Motor valve and refrigeration cycle system
CN113566460A (en) * 2020-04-26 2021-10-29 浙江三花智能控制股份有限公司 Electronic expansion valve
CN217736277U (en) * 2022-01-26 2022-11-04 浙江盾安人工环境股份有限公司 Electronic expansion valve

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2842799A1 (en) * 1978-09-30 1980-04-10 Schell Kg Hubert Low noise angle valve - has conical seat with seal which lifts off to give annular passage when valve cone is raised
JP2004340260A (en) * 2003-05-15 2004-12-02 Saginomiya Seisakusho Inc Flow control valve
JP2007032863A (en) * 2005-07-22 2007-02-08 Tgk Co Ltd Expansion valve
CN102713383A (en) * 2010-08-20 2012-10-03 术富仪表设备制造有限公司 Control valve, in particular angle control valve and double control valve, also in the form of a straight-seat valve and inc.lined-seat valve for extreme control applications
CN103097836A (en) * 2010-09-24 2013-05-08 大金工业株式会社 Expansion valve
JP2019007550A (en) * 2017-06-23 2019-01-17 株式会社鷺宮製作所 Motor valve and refrigeration cycle system
CN113566460A (en) * 2020-04-26 2021-10-29 浙江三花智能控制股份有限公司 Electronic expansion valve
CN217736277U (en) * 2022-01-26 2022-11-04 浙江盾安人工环境股份有限公司 Electronic expansion valve

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