WO2020034423A1 - 无标题 - Google Patents

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Publication number
WO2020034423A1
WO2020034423A1 PCT/CN2018/112852 CN2018112852W WO2020034423A1 WO 2020034423 A1 WO2020034423 A1 WO 2020034423A1 CN 2018112852 W CN2018112852 W CN 2018112852W WO 2020034423 A1 WO2020034423 A1 WO 2020034423A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
hole
valve body
electronic expansion
sleeve
Prior art date
Application number
PCT/CN2018/112852
Other languages
English (en)
French (fr)
Inventor
刘乐强
贺宇辰
许学飞
Original Assignee
浙江盾安禾田金属有限公司
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 CN201821337603.0U external-priority patent/CN209012453U/zh
Priority claimed from CN201810943399.5A external-priority patent/CN110836270B/zh
Priority claimed from CN201821337584.1U external-priority patent/CN209012510U/zh
Priority claimed from CN201810943402.3A external-priority patent/CN110836271A/zh
Priority claimed from CN201821335343.3U external-priority patent/CN209012452U/zh
Priority claimed from CN201821335771.6U external-priority patent/CN209042827U/zh
Priority claimed from CN201821335535.4U external-priority patent/CN209012499U/zh
Priority claimed from CN201821335213.XU external-priority patent/CN209042825U/zh
Priority claimed from CN201810941619.0A external-priority patent/CN110836562A/zh
Priority claimed from CN201821335275.0U external-priority patent/CN209042826U/zh
Priority claimed from CN201810942746.2A external-priority patent/CN110836269B/zh
Priority to KR1020227003184A priority Critical patent/KR20220020398A/ko
Priority to JP2020551493A priority patent/JP7224366B2/ja
Priority to KR1020227003186A priority patent/KR20220020400A/ko
Priority to KR1020227003187A priority patent/KR20220020401A/ko
Priority to KR1020227007594A priority patent/KR102484650B1/ko
Priority to KR1020227003185A priority patent/KR102646329B1/ko
Priority to KR1020227003189A priority patent/KR20220020403A/ko
Priority to KR1020217041450A priority patent/KR20210156352A/ko
Application filed by 浙江盾安禾田金属有限公司 filed Critical 浙江盾安禾田金属有限公司
Priority to KR1020217037432A priority patent/KR102454733B1/ko
Priority to KR2020207000073U priority patent/KR20210000190U/ko
Priority to KR1020227003188A priority patent/KR102668677B1/ko
Publication of WO2020034423A1 publication Critical patent/WO2020034423A1/zh
Priority to JP2022040042A priority patent/JP7369225B2/ja
Priority to JP2022044043A priority patent/JP7369813B2/ja
Priority to JP2022049015A priority patent/JP7386283B2/ja
Priority to JP2022054595A priority patent/JP7369816B2/ja
Priority to JP2022057512A priority patent/JP7448580B2/ja
Priority to JP2022063134A priority patent/JP2022087187A/ja
Priority to JP2022063350A priority patent/JP7439161B2/ja
Priority to JP2022067844A priority patent/JP7448583B2/ja

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/345—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by solenoids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/20—Check valves specially designed for inflatable bodies, e.g. tyres
    • 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
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • 2018109434023 entitled “Electronic expansion valve and air-conditioning system using the same”, filed on August 17, 2018, with application number 2018213355354, entitled “Electronic expansion valve and air-conditioning system using the same”, Application dated August 17, 2018, with application number 2018109416190, entitled “Electronic expansion valve and air conditioner using the same” "Applied on August 17, 2018, with application number 2018213352892, entitled” Electronic Expansion Valve and Air-conditioning System Using the Electronic Expansion Valve ", and applied on August 17, 2018.
  • the present invention relates to the field of refrigeration technology, and in particular, to an electronic expansion valve. Background technique
  • the electronic expansion valve opens or closes the valve port opened on the valve body through the movement of the valve stem assembly in the guide sleeve and the nut sleeve, so as to achieve the purpose of adjusting flow rate and throttling and reducing pressure, and is applied in the technical field of refrigeration equipment Extensive.
  • Existing electronic expansion valves are cumbersome to install, reducing the reliability and stability of electronic expansion valves. Summary of the Invention
  • an electronic expansion valve is provided.
  • An electronic expansion valve includes a valve body, a valve needle assembly, a screw assembly, a rotor assembly, a stator assembly, and a sleeve, and a guide sleeve for guiding the movement of the valve needle assembly is provided inside the valve body.
  • the valve needle assembly is disposed on the guide sleeve, the screw assembly is connected to the rotor assembly, the stator assembly acts on the rotor assembly and can drive the rotor assembly to rotate, and the rotation of the rotor assembly can drive
  • a valve port is opened on the valve body, the valve needle assembly is closed or opened by the screw assembly, and the sleeve is sleeved on the valve body away from the valve body. Said one end of the valve port.
  • FIG. 1 is a perspective view of an electronic expansion valve according to an embodiment:
  • FIG. 2 is a cross-sectional view of an electronic expansion valve according to an embodiment:
  • FIG. 3 is a perspective view of an electronic expansion valve according to another embodiment: Correction page (Detailed Article 91) ISA / CN 4 is a cross-sectional view of the electronic expansion valve provided according to FIG. 3;
  • FIG. 5 is a sectional view of a valve body provided according to an embodiment
  • FIG. 6 is a cross-sectional view of a valve body provided with a second mounting step according to an embodiment
  • FIG. 7 is a sectional view of a valve body provided according to another embodiment.
  • FIG. 8 is a cross-sectional view of a valve body provided with a chip storage structure according to an embodiment
  • FIG. 9 is an enlarged view at position B provided according to FIG. 8;
  • FIG. 10 is a sectional view of a valve body provided with a limiting portion according to an embodiment
  • FIG. 11 is an enlarged view at C provided according to FIG. 10;
  • FIG. 12 is a cross-sectional view of a chip storage structure according to another embodiment
  • FIG. 13 is an enlarged view provided at D according to FIG. 12;
  • FIG. 14 is a cross-sectional view of a guide sleeve provided according to an embodiment
  • FIG. 15 is a cross-sectional view of a guide sleeve provided according to another embodiment
  • FIG. 16 is a cross-sectional view of a guide sleeve provided according to yet another embodiment
  • FIG. 17 is a perspective view of an electronic expansion valve omitting a sleeve and a valve body according to an embodiment
  • FIG. 18 is a perspective view of a screw assembly according to an embodiment
  • FIG. 19 is a sectional view of a valve needle assembly and a screw assembly according to an embodiment
  • 20 is a cross-sectional view of an electronic expansion valve according to another embodiment
  • FIG. 21 is a cross-sectional view of a valve needle assembly provided according to FIG. 20;
  • FIG. 22 is a cross-sectional view of an electronic expansion valve provided with a noise reduction module according to an embodiment
  • FIG. 23 is a cross-sectional view of a valve body provided with a receiving cavity according to an embodiment
  • FIG. 24 is a cross-sectional view of a noise reduction module according to an embodiment
  • FIG. 25 is a cross-sectional view of a noise reduction module according to another embodiment
  • 26 is a cross-sectional view of a noise reduction module according to another embodiment
  • FIG. 27 is a sectional view of an electronic expansion valve provided with a welding structure according to an embodiment
  • FIG. 28 is an enlarged view at position E provided according to FIG. 27;
  • FIG. 29 is an enlarged view at A provided according to FIG. 4;
  • FIG. 30 is a cross-sectional view of a guide sleeve provided according to an embodiment
  • FIG. 31 is a perspective view of a connection sheet according to an embodiment
  • FIG. 32 is a top view of a connection sheet provided according to an embodiment
  • FIG. 33 is a perspective view of a nut sleeve provided according to an embodiment
  • 34 is a cross-sectional view of a nut sleeve according to an embodiment.
  • the electronic expansion valve 100 the medium inlet pipe 101, the medium outlet pipe 102, the axis 103, the first end 104 of the valve body, the second end 105 of the valve body, the first chamfer 106, and the second chamfer 107, Weld ring 108, Weld 109, Valve body 10, Inlet 10a, Outlet 10b, Mounting frame 10c, First mounting step 10d, Second mounting step 10e, Receiving cavity 10f, Valve port 11, Valve cavity 12, Hole 13, mounting cavity 14, first positioning step 14a, stopper 141, inside side 141a of stopper, outside side 141b of stopper, opening 142, connection cavity 15, mounting base 110, mounting hole 111 , Guide sleeve 16, guide hole 16a, valve pin hole 16b, plane 161, first cylindrical section 162, step 162a, first end 162b of first cylindrical section; second end 162c of first cylindrical section, second cylindrical section 163, the third cylindrical section 164, the guide structure 165, the boss 166, the connecting
  • the present application provides an electronic expansion valve 100, which is used in an air conditioning refrigeration system to adjust the flow rate and pressure of a fluid medium.
  • the fluid medium flowing through the electronic expansion valve 100 is a refrigerant used for cold and heat exchange in an air-conditioning refrigeration system, and the electronic expansion valve 100 is used for throttling and reducing the high-temperature and high-pressure liquid refrigerant.
  • a low-temperature and low-pressure gas-liquid two-phase refrigerant is used for heat exchange to achieve cooling purposes.
  • the electronic expansion valve 100 includes a valve body 10, a valve needle assembly 20, a screw assembly 30, a sleeve 40, a rotor assembly 50, and a stator assembly (not shown).
  • the valve needle assembly 20 and the screw assembly 30 and the sleeve 40 are mounted on the valve body 10, one end of the screw assembly 30 is connected to the valve needle assembly 20, and the other end is connected to the rotor assembly 50, and the rotor assembly 50 is provided at In the sleeve 40, the stator assembly is disposed on the sleeve 40, the stator assembly is energized to generate a magnetic field, and the rotor assembly 50 is rotated by the magnetic field force, and the rotor assembly 50 is driven The screw assembly 30 moves, so that the screw assembly 30 drives the valve needle assembly 20 to move, and the electronic expansion valve 100 is opened or closed to achieve the purpose of adjusting the flow rate and pressure.
  • the valve body 10 is made of stainless steel. Of course, the valve body 10 can also be manufactured from other materials. In this embodiment, examples are not given one by one.
  • the valve body 10 is substantially cylindrical. Of course, in other embodiments, the valve body 10 may also have other shapes.
  • the valve body 10 has an axis 103, and the valve body 10 is sequentially provided with a valve port 11, a valve chamber 12, a through hole 13, a mounting chamber 14 and a connection chamber 15 along the axis 103.
  • the valve port 11 is used for the valve needle assembly 20 to extend in, so as to control the flow of the fluid medium at the valve port 11.
  • the valve needle assembly 20 closes the valve port 11, the valve port 11 Disconnected from the valve chamber 12 and the electronic expansion valve 100 is closed; when the valve needle assembly 20 is unsealed from the valve port 11, that is, the valve port 11 and the valve chamber 12 communicate with each other, The electronic expansion valve 100 is opened.
  • the through hole 13 is opened at the bottom of the mounting cavity 14, and the diameter of the through hole 13 is smaller than the inner diameter of the mounting cavity 14. It should be understood that the through hole 13 is provided so that the bottom of the mounting cavity 14 forms a first positioning step 14a in a ring shape, and the mounting cavity 14 and the connecting cavity 15 communicate with each other along the direction of the axis 103.
  • the valve body 10 is also provided with an inlet 10a for the fluid medium to enter, and an outlet 10b-the valve port 11 is provided between the inlet 10a and the outlet 10b, the inlet 10a and the valve
  • the cavity 12 is provided in communication, and the outlet 10b is in communication with the valve port 11 to control the movement of the valve needle assembly 20 so as to achieve conduction or closure between the inlet 10a and the outlet 10b.
  • a medium inlet pipe 101 for transporting a fluid medium is installed at the inlet 10a, and a medium outlet pipe 102 for transporting a fluid medium is installed at the outlet 10b.
  • the fluid medium is a refrigerant, and the refrigerant flows from the medium inlet pipe 101 into the electronic expansion valve 100, passes through the throttling and pressure reduction of the electronic expansion valve 100, and exits the pipe from the medium. 102 is discharged.
  • an end of the valve body 10 remote from the sleeve 40 is provided with a first protrusion 18 for mounting the medium outlet pipe 102, and the outlet 10b is along the axis 103 Through the first protrusion 18, the outlet 10b is in communication with the valve port 11.
  • the medium outlet pipe 102 and the valve body are connected by welding.
  • an end of the valve body 10 remote from the sleeve 40 is provided with a connection groove 19, the first protrusion 18 is located at a bottom of the connection groove 19, and the medium outlet pipe 102-end It is sleeved on the first protrusion 18 and abuts against the groove bottom of the connection groove 19.
  • Correct page here (Article 91) ISA / CN By providing the connection groove 19, the welding between the medium outlet pipe 102 and the valve body 10 can be facilitated, and the outflow of the solder can be prevented, and the welding quality can be improved.
  • the valve body 10 is provided with a guide sleeve 16 and a connecting piece 17.
  • the guide sleeve 16 is installed in the installation cavity 14 and has an interference fit with the installation cavity 14.
  • the interference fit refers to: the size of the inner diameter of the mounting cavity 14 minus the size of the outer diameter of the guide sleeve 16 that is matched is a negative value.
  • the guide sleeve 16 is used to guide the valve needle assembly 20 to move along the direction of the axis 103 of the valve body 10.
  • the connecting piece 17 is installed in the connecting cavity 15 and is used to install the screw assembly 30.
  • the connecting piece 17 is installed in the connecting cavity 15 by welding.
  • valve body is provided with a first mounting step 10d, the first mounting step 10d is located at an end of the valve body 10 where the connection cavity 15 is opened, and the sleeve 40 is mounted on the first Mount on the step 10d.
  • a mounting seat 110 may be provided on the valve body 10, and the sleeve 40 is mounted on the mounting seat 110.
  • One end of the guide sleeve 16 is installed in the mounting cavity 14 and is in an interference fit with the mounting cavity 14, and the other end protrudes from the mounting cavity 14 and is connected to the screw assembly 30.
  • the sheet 17 is mounted on the mounting base 110.
  • the mounting seat 110 is substantially cylindrical, and the mounting seat 110 is welded to the valve body 10 by welding. Of course, in other embodiments, the mounting seat 110 may also be Connected to the valve body 10 in other ways.
  • the sleeve 40 is welded to the mounting base 110 by welding, and is sealedly connected to the mounting base 110.
  • the mounting base 110 is provided with a mounting hole 111, and a part of the screw assembly 30 is extended. Into the mounting hole 111 to connect with the guide sleeve 16.
  • the mounting seat 110 replaces part of the function of the valve body 10 to install the screw assembly 30 and the sleeve 40, so that the valve body can be reduced.
  • the weight of the valve body 10 is reduced, and the processing difficulty of the valve port 11 on the valve body is reduced, the processing accuracy of the valve body 10 and the valve port 11 is ensured, and the flow control accuracy of the electronic expansion valve 100 is improved.
  • the valve body 10 is provided with a second mounting step 10e, and the mounting seat 110 is welded to the second mounting step 10e.
  • the valve body 10 and the mounting seat 110 may adopt an integrated structure or a split structure. In this embodiment, a split structure is used between the valve body 10 and the mounting seat 110.
  • the mounting cavity 14 has a limiting portion 141 in a circumferential direction at an end away from the valve port 11.
  • the mating portion 161 is used to cooperate with the limiting portion 141 to realize the positioning of the guide sleeve 16 in the direction of the axis 103, so as to prevent the guide sleeve 16 from moving along under the high pressure of the fluid medium and the high / low temperature of the fluid medium Loosing along the axis 103 generates noise.
  • the limiting portion 141 is ring-shaped, and an inner diameter of the limiting portion 141 is smaller than an inner diameter of the mounting cavity 14.
  • a section of the limiting portion 141 along a plane where the axis X is located is trapezoidal or arc-shaped.
  • One end of the limiting portion 141 having a larger inner diameter is disposed near the mounting cavity 14, and one end of the limiting portion 141 having a smaller inner diameter is disposed away from the mounting cavity 14.
  • the limiting portion 141 has an inner side surface 141a and an outer side surface 141b which are oppositely arranged to abut against the guide sleeve 16.
  • An included angle a is formed between an inner side surface 141 a of the limiting portion and an inner wall of the mounting cavity 14. It should be understood that forming an angle a between the inner side surface 141 a of the limiting portion and the inner wall of the mounting cavity 14 is equivalent to forming a shoulder that restricts the movement of the guide sleeve 16 along the X axis.
  • the limiting portion 141 may be integrated with the valve body 10, or may be provided separately from the valve body 10.
  • the limiting portion 141 and the valve body 10 are formed as an integrated structure, which can facilitate processing and manufacturing of the valve body 10 to reduce production costs.
  • the position-limiting portion 141 and the valve body 10 are provided separately, which can facilitate the installation of the guide sleeve 16.
  • the two above-mentioned arrangement manners of the position-limiting portion 141 and the valve body 10 each have advantages. Specifically, the manner of setting the position-limiting portion 141 can be set according to actual needs.
  • the limiting portion 141 may be provided as a stopper.
  • the included angle between the stopper and the valve body 10 may be 90 degrees.
  • the stopper is ring-shaped, and the stopper is installed in the connection cavity 15 by a locking member such as a bolt.
  • Correction page (Article 91) ISA / CN [0064]
  • the guide sleeve 16 is made of brass material, that is, a brass guide sleeve.
  • the brass guide sleeve is relatively soft, which can facilitate the guide sleeve 16 and the screw assembly. 30 or installation between the valve bodies 10, and can reduce the noise caused by the impact of the fluid medium with the guide sleeve 16. It can be understood that, in other embodiments, the guide sleeve 16 may also be manufactured by using materials other than brass.
  • the guide sleeve 16 is substantially cylindrical, the guide sleeve 16 and the valve port 11 are spaced apart from each other, and the end surface of the guide sleeve 16 near the valve port 11 is a flat surface 161.
  • the plane 161 is a smooth surface or a smooth surface, that is, the friction coefficient of the plane 161 is low, so that when a fluid medium passes through the plane 161, it can flow along the plane 161 to further reduce the noise of the fluid. .
  • the guide sleeve 16 has an axis Y, and the guide sleeve 16 is provided with a guide hole 16a and a valve pin hole 16b along the axis Y.
  • the diameter of the valve pin hole 16b is smaller than the diameter of the guide hole 16a.
  • the valve pin hole 16b is located at the bottom of the guide hole 16a and communicates with the guide hole 16a.
  • valve pin hole 16b is smaller than the diameter of the guide hole 16a; the bottom of the guide hole 16a combined with the valve pin hole 16b forms a limit step 161a; The valve needle assembly 20 is installed in the guide hole 16a and moves under the guidance of the guide hole 16a and the valve needle hole 16b.
  • the guide sleeve 16 may be a three-stage structure.
  • the guide sleeve 16 includes a first portion installed in the installation cavity 14.
  • the guide sleeve 16 may also be a two-stage structure.
  • the first cylindrical section 162 is an intermediate section, that is, located between the second cylindrical section 163 and the third cylindrical section 164, and the outer diameter of the first cylindrical section 162 is larger than the first cylindrical section 162, respectively.
  • a step 162a is formed between the first cylindrical section 162, the second cylindrical section 163, and the third cylindrical section 164, respectively, and the first cylindrical section 162 and the second cylindrical section
  • the step 162a between 163 and the first positioning step 14a at the bottom of the mounting cavity 14 cooperate to achieve positioning of the second cylindrical section 163.
  • the first cylindrical section 162 has a first end 162b and a second end 162c opposite to each other; the second cylindrical section 163 is connected to the first cylindrical section 162 Two ends 162c.
  • An end surface of the first end 162b of the first cylindrical segment is a plane 161.
  • the axis Y is perpendicular to the plane 161. Since the end surface of the first end 162b of the first cylindrical segment is a plane 161, the frictional force between the contact between the fluid medium and the second cylindrical segment 163 can be reduced, thereby reducing the generation of noise and improving the user's Comfort.
  • an end surface of the first end 162b of the first cylindrical section is abutted against the bottom of the mounting cavity 14, so as to achieve the installation of the guide sleeve 16.
  • the first end 162b of the first cylindrical segment has a guide structure 165 in the circumferential direction.
  • setting the guide structure 165 can facilitate the installation of the guide sleeve 16.
  • a circumferential direction of an end of the second cylindrical section 163 away from the first cylindrical section 162 also has the guide structure 165a.
  • the guide structure 165 includes a guide portion 165a provided at the second end 162c of the first cylindrical section.
  • the guide portion 165a is a round corner guide portion or a conical guide portion.
  • the guiding structure 165 may also be other structures.
  • the structure of the guide sleeve 16 is basically the same as the structure of the guide sleeve 16 in the embodiment, and the difference is that the first A boss 166 is provided on an end surface of a first end 162b of a cylindrical section, and an end surface of an end of the boss 166 far from the first cylindrical section is the plane 161.
  • the boss 166 extends into the through hole 13, and the plane 161 abuts on the first positioning step 14 a, so as to realize the positioning and installation of the guide sleeve 16.
  • Correction page (Article 91) ISA / CN [0075] As shown in FIG.
  • the structure of the guide sleeve 16 is basically the same as the structure of the guide sleeve 16 in the embodiment, and the difference is that the first The first end 162b of a cylindrical segment is provided with the third cylindrical segment 164, and the third cylindrical segment 164 and the valve port 11 are spaced from each other; the third cylindrical segment 164 is far from the first cylindrical segment One end of 162 is the plane 161.
  • An outer diameter of the third cylindrical section 164 is smaller than an outer diameter of the second cylindrical section 163, and the step 162a is also formed between the third cylindrical section 164 and the second cylindrical section 163.
  • the third cylindrical section 164 extends from the through hole 13 into the valve cavity 12.
  • the third cylindrical section 164 is stepped.
  • the length of the second cylindrical section 163 is 1 / 4-1 / 3 times the length of the guide sleeve.
  • the guide sleeve 16 can have a sufficient fitting size with the screw
  • the components 30 cooperate to improve the reliability of the connection, and at the same time reduce the risk of the guide sleeve 16 becoming loose due to vibration and other reasons.
  • the lengthening of the third cylindrical section 164 increases the overall length of the guide hole 16a.
  • the valve needle assembly 20 is installed in the guide hole 16 a to improve the overall coaxiality of the valve needle assembly 20.
  • the length of the second cylindrical segment 163 is 3/10 times the length of the guide sleeve 16. It can be understood that the length of the second cylindrical segment 163 occupies approximately 1/3 of the length of the guide sleeve 16, so that the reliability of the connection between the second cylindrical segment 163 and the screw assembly 30 can be further improved. Sex.
  • An end of the third cylindrical segment 164 away from the first cylindrical segment 162 also has a guiding structure.
  • setting the guide structure can facilitate the installation of the guide sleeve 16.
  • the guide structure is a structure such as a chamfer or a tapered surface provided on the first cylindrical section 162 and the third cylindrical section 164.
  • the connecting piece 17 is welded to the valve body 10, and the valve body 10 is further provided with a mounting frame 10c, and the mounting frame 10c is provided on the valve body 10 or the valve body At the connection between 10 and the mounting base 110, the mounting bracket 10c is welded to the valve body 10, or it is welded to the valve body 10 and the mounting base 110, respectively. External equipment cooperates to achieve the installation of the electronic expansion valve 100.
  • a chip storage structure 120 is provided between the valve body 10 and the guide sleeve 16, and the chip storage structure 120 is used to store the valve body 10 and the guide Debris between sets of 16. Therefore, during the installation process of the guide sleeve 16, debris on the valve body 10 and the guide sleeve 16 enters the electronic expansion valve 100 in the form of impurities, which affects the normal operation of the electronic expansion valve 100.
  • the mounting cavity 14 has an inner wall
  • the chip storage structure 120 includes a first chip storage groove 121 opened in a circumferential direction of the inner wall of the mounting cavity 14.
  • a plurality of the first shoulder storage grooves 121 may be provided, and a plurality of the first debris storage grooves 121 are provided on the inner wall of the mounting cavity 14 at intervals along the axis X of the valve body 10.
  • a first chip guide structure 122 is provided at a slot of each of the first chip storage grooves 121 so as to guide debris on the valve body 10 and the guide sleeve 16 into the first chip storage grooves 121.
  • the first chip guiding structure 122 includes a first chip guiding portion 122a provided on an inner wall of the mounting cavity 14, and the first chip guiding portion 122a is located in the first chip storage groove 121. Notch.
  • the first chip guide portion 122a is located at an inclined chip guide portion or a rounded shoulder guide portion.
  • the mounting cavity 14 has an opening 142, and the opening 142 is disposed away from the valve port 11.
  • An end of the first chip storage groove 121 near the opening 142 of the mounting cavity 14 is disposed on an inner wall of the mounting cavity 14. Therefore, on the premise that the assembly requirements are met, the angle of the fitting section of the guide sleeve 16 and the open 142 end of the mounting cavity 14 is reduced as much as possible to reduce the extrusion of debris.
  • the guide sleeve 16 has an outer wall, and the chip storage structure 120 includes a second chip storage groove opened in a circumferential direction of the outer wall of the guide sleeve. 123.
  • the second chip storage groove 123 is disposed on an outer wall of the first cylindrical section 162. Further, the second chip storage groove 123 is disposed near the second end 162c of the first cylindrical section 162. It can be understood that, the second end 162c of the first cylindrical section 162 is arranged as a short interference fit section with the mounting cavity 14 to reduce the extrusion of debris.
  • Correction page (Article 91) ISA / CN [0087] Further, a plurality of the second chip storage grooves 123 may be provided. A plurality of the second chip storage grooves 123 are disposed on the outer wall of the first cylindrical section 162 at intervals along the axis Y of the guide sleeve 16. A second chip guide structure 124 is provided at the slot of each of the second chip storage grooves 123 so as to guide the broken shoulders on the valve body 10 and the guide sleeve 16 into the second chip storage grooves 123. .
  • the second chip guide structure 124 includes a second chip guide portion 124a provided on an outer wall of the guide sleeve 16, and the second chip guide portion 124a is located in the second chip storage groove 123. Notch.
  • the second shoulder guide portion 124a is located at an inclined shoulder guide portion or a rounded chip guide portion.
  • the mounting cavity 14 has an inner wall
  • the guide sleeve 16 has an outer wall
  • the chip storage structure 120 includes the first chip storage groove 121 in Embodiment 1, and in Embodiment 2 ⁇ ⁇ ⁇ ⁇ ⁇ 123.
  • the first shoulder storage groove 121 on the inner wall of the mounting cavity 14 and the second debris storage groove 123 on the outer wall of the guide sleeve 16 are offset from each other along the direction of the axis 103.
  • the valve needle assembly 20 includes a valve needle sleeve 21 installed in the guide sleeve 16, and the valve needle installed.
  • the valve needle 22 in the sleeve 21 has an axis, and the axis of the valve needle 22 coincides with the axis 103 of the valve body 10.
  • One end of the valve needle 22 is connected to the screw assembly 30, and the other end is matched with the valve port 11.
  • the screw assembly 30 drives the valve needle 22 to control the opening or closing of the valve port 11, thereby
  • the electronic expansion valve 100 is opened / closed.
  • the valve needle assembly 20 further includes a first spring seat 23, a second spring seat 24, an elastic member 25, and a guide seat 26, the first elastic yellow seat 23, the second spring seat 24, and the elastic member 25 is housed in the valve needle cover 21, the first spring seat 23 is connected to the screw assembly 30 and abuts on the guide seat 26, and one end of the elastic member 25 abuts on the first spring The other end of the seat 23 is abutted against the second spring seat 24, and the guide seat 26 is installed at one end of the valve needle sleeve 21 away from the valve needle 22 and abuts against the second spring seat 24.
  • the guide seat 26 is used to cooperate with the screw assembly 30.
  • valve needle assembly 20 further includes a ball 27, the ball 27 is housed in the valve needle sleeve 21, and the ball 27 is disposed between the valve needle 22 and the screw assembly 30 To reduce the area of the friction contact surface between the valve needle 22 and the screw assembly 30, thereby reducing the wear of the valve needle 22 and the screw assembly 30, and improving the reliability of the electronic expansion valve 100 And stability.
  • the ball 27 is provided between the second spring seat 24 and the valve pin 22, and the ball 27 and the valve pin 22 or the second spring seat 24 are welded by spot welding.
  • the valve needle 22 is provided with a groove 221, the ball 27 is installed in the groove 221, and the ball 27 and the valve needle 22 are welded by spot welding.
  • the second spring seat 24 and the valve needle 22 are in point contact, so that the frictional contact surface between the second spring seat 24 and the valve needle 22 is reduced. Area to reduce contact wear between the second spring seat 24 and the valve needle 22, and improve the reliability and stability of the electronic expansion valve 100.
  • the screw assembly 30 includes a screw 31 and a nut sleeve 32, the screw 31 has a first end and a second end opposite to each other, and one end of the screw 31 Is connected to the rotor assembly 50, the second end of the screw 31 passes through the nut sleeve 32, and is connected to the first spring seat 23, between the second end of the screw 31 and the nut sleeve 32 A threaded connection.
  • One end of the nut sleeve 32 is mounted on the connecting piece 17.
  • the nut sleeve 32 has a first end 32a and a second end 32b opposite to each other, the first end 32a of the nut sleeve is mounted on the connecting piece 17, and the second of the nut sleeve The end 32 b is received in the sleeve 40.
  • the first end 32a of the nut sleeve is extended with a mating section 321, and the mating section 321 extends into the mounting hole 111 and is disposed close to the first cylindrical section 162.
  • the first end 32b of the nut sleeve is provided with a latching groove 32c, and the latching groove 32c is provided with a latching protrusion.
  • a connecting hole is provided in the connecting piece 17, The first end 32b of the nut sleeve is installed in the connection hole, and a snap connection with the connection piece 17 is achieved through the snap protrusion.
  • the rotor assembly 50 and the like move along the axial direction of the screw 31, so that the screw 31 drives the valve needle assembly 20 to move.
  • Correction page (Article 91) ISA / CN [0097]
  • the matching section 321 is provided with a matching hole 321a, and the third cylindrical section 164 extends from the matching hole 321a into the nut sleeve 32, and connects with the nut sleeve 32. Fixed connection. It can be understood that, by providing the fitting section 321, the fitting length between the guide sleeve 16 and the nut sleeve 32 can be extended, and the reliability of the connection between the guide sleeve 16 and the nut sleeve 32 can be improved.
  • the fixed connection includes a screw connection, an interference fit, and the like.
  • an interference fit exists between the third cylindrical segment 164 and the nut sleeve 32, so that the nut sleeve 32 is aligned by the third cylindrical segment 164, so that the nut sleeve
  • the axis of 32 is coincident with the axis of the guide sleeve 16 and the axis of the valve body 10.
  • the interference fit between the first cylindrical segment 162 and the mounting cavity 14 is between the third cylindrical segment 164 and the nut sleeve 32.
  • Interference fit to guide the valve body 10 through the first cylindrical section 162, and the nut sleeve 32 to be guided by the third cylindrical section 164, so that the valve body 10, the guide sleeve 16 and the The axes of the three nut sleeves 32 coincide to ensure the coaxiality between the three screws 31, the valve needle 22, and the valve port 11, so that the valve needle is reduced during the movement.
  • the collision between 22 and the valve body 10 further reduces the wear of components such as the valve needle 22 and improves the service life of the electronic expansion valve 100.
  • a second positioning step 322 may be provided in the nut sleeve 32, and the third cylindrical section 164 extends into the nut sleeve 32 and abuts on the second positioning step 322 to further improve the The reliability of the installation of the guide sleeve 16 avoids the axial movement of the guide sleeve 16 under the pressure of the fluid medium, and noise is generated.
  • the basic structure of the valve needle assembly 20 is basically the same as the structure of the valve needle assembly 20 described above, and the difference is that the
  • the valve needle assembly 20 further includes a bearing 211, a gasket 212, and an elastic member 213.
  • the bearing 211 and the gasket 212 are disposed on an end of the screw assembly 30 near the valve needle 22.
  • the needle 22 contacts; one end of the bearing 211 abuts against the screw assembly 30 and the valve needle cover 21, and the other end contacts the washer 212; the washer 212 is accommodated in the valve needle cover 21 and contacts the outer ring of the bearing 211.
  • the screw 31 is provided with a second protrusion 311 extending along the radial direction of the screw 31, the second protrusion 31 1 is flush with the inner side of the valve needle sleeve 21; the inner ring of the bearing 21 1 abuts against the first
  • the two protrusions 311, the inner side of the valve needle cover 21 faces the abutment of the outer ring of the bearing 211, so as to limit the position of the screw 31 and the valve needle cover 21 to the bearing 211.
  • the screw 31 is fixedly connected to the inner ring of the bearing 211.
  • the screw 31 and the inner ring of the bearing 211 are fixed to each other through an interference fit, that is, the size of the screw 31 is larger than the diameter of the inner ring of the bearing 21 1. At this time, there is a relatively good distance between the screw 31 and the bearing 21 1. Connection stability.
  • the screw 31 and the inner ring of the bearing 211 may be fixed to each other by other connection methods such as riveting and cementing.
  • the screw 31 rotates under the driving of the rotor assembly 50. Due to the fixed connection between the screw 31 and the inner ring of the bearing 21, the screw 31 drives the inner ring of the bearing 211 to rotate.
  • the rolling elements in the bearing 211 are in rolling contact with the outer ring of the bearing 211, thereby releasing the rotation by the screw 31.
  • the bearing 211 has a plurality of rolling bodies, so the rotation release of the screw 31 is changed from a single-point rolling contact in the conventional electronic expansion valve 100 to a multi-point rolling contact in this embodiment. Therefore, the contact force is shared by multiple rolling elements, which reduces the contact pressure at each contact point, and the rolling friction reduces the friction force.
  • the contact force on the rolling body is perpendicular to the direction of gravity of the screw 31, which also relatively reduces the contact force at the contact point in the conventional electronic expansion valve and improves the electronics. Stability and reliability of the expansion valve 100.
  • the bearing 211 has a clearance, so that the valve needle 22 has a certain degree of freedom, which can reduce the coaxiality error between the valve needle 22 and the valve port 11.
  • the elastic member 213 is a spring. At this time, the elastic member 213 has relatively high connection stability. It can be understood that, in other embodiments, the elastic member 213 may also be another type of elastic element such as an elastic post.
  • the rotor assembly 50 includes a rotor 51 located in the sleeve 40, an adapter plate 52 for mounting the screw 31, and a restriction for the rotor 51.
  • Correction page of rotation angle limiter 53 and guide piece mounted on the adapter plate 52 (Details Article 91) ISA / CN 54,
  • the rotor 51 is mounted on the adapter plate 52, and the adapter plate 52 and the screw 31 are fixedly connected by welding or the like.
  • the limiter 53 includes a spring 531 sleeved on the nut sleeve, and a stop ring 532 mounted on the guide piece 54, one end of the spring 531 and the connection piece 17
  • a stop portion 531 a is provided at the other end of the spring 531, and the stop ring 532 is wound on the spring 531.
  • a stopper 323 is provided on the outer wall of the nut sleeve 32, and the stopper 323 is matched with the stopper ring 532 to limit the rotation angle of the rotor 51.
  • the stop The ring 532 moves along the spring 531; the stop ring 532 abuts against the stop 323, limits the rotation angle of the rotor 51, and is the lower limit of the rotor 51.
  • the stop ring 532 moves along the spring 531; The stop ring 532 abuts against the stop portion 531 a to limit the rotation angle of the rotor 51, which is the upper limit of the rotor 51.
  • the outer side of the screw 31 extends outward in the radial direction of the screw 31 and forms a boss 311, and the boss 311 on the screw 31 abuts against the guide sleeve 26, thereby determining the rotor in the electronic expansion valve 100 51 and the lower limit of the movement of the screw 31.
  • the lower limit of the electronic expansion valve 100 is determined by the mutual resistance between the screw 31 and the guide sleeve 26, the screw 31 is a long straight rod, and the direction of the impact force generated by mechanical collision is consistent with the axial direction of the screw 31. Not only the vibration and noise generated is relatively low, but also the vibration and noise generated by the impact force can be quickly consumed on the long and straight rod body. Therefore, the noise generated by the electronic expansion valve 100 switching the movement state of the rotor assembly 50 due to the lower limit limit Relatively lower.
  • the upper limit position of the electronic expansion valve 100 is realized by mutual resistance between the stop ring 532 and the stop portion 531a of the spring 531.
  • the stop ring 532 moves along the spring 531.
  • the stop ring 532 abuts against the stop portion 531 a to limit the rotation angle of the rotor 51 and is the upper limit of the rotor 51 and the screw 31.
  • the upper limit of the electronic expansion valve 100 is the end of the screw 31 away from the valve needle assembly 20 and the sleeve 40 conflicting decisions.
  • the upper limit of the electronic expansion valve 100 is still determined by the screw 31.
  • the screw 31 is a long straight rod.
  • the direction of the impact force generated by the mechanical collision is consistent with the axial direction of the screw 31.
  • the vibration and noise generated by the impact force can be consumed quickly on the long and straight rod body. Therefore, the noise generated by the electronic expansion valve 100 due to the upper limit limitation of switching the movement state of the rotor assembly 50 is relatively reduced.
  • one end of the screw 31 adjacent to the sleeve 40 is set to be curved to match the shape of the inner side of the sleeve 40. At this time, the screw 31 and the sleeve 40 have relatively good connection performance.
  • the upper limit of the electronic expansion valve 100 can also be achieved by the mutual abutment between the guide seat 26 and the nut sleeve 32, the nut sleeve 32 abuts the guide seat 26, because the guide seat 26 and the screw 31 In a fixed connection, the abutment of the nut sleeve 32 on the guide seat 26 can restrict the screw 31 from being further away from the valve port 11.
  • the nut sleeve 32 is a relatively large-sized rotating part, and the noise caused by the impact force caused by mechanical collision is relatively small, and the vibration generated by the nut sleeve 32 and the noise caused by the vibration can also be quickly consumed. Therefore, the noise generated by the electronic expansion valve 100 due to the limitation of the upper limit to switch the movement state of the rotor assembly 50 is relatively reduced.
  • the lower limit referred to in this specification refers to the maximum working position of the screw 31 moving toward the valve port 11, and the working position is named the lower limit;
  • the upper limit referred to in this specification refers to the screw 31 Move away from the maximum working position of valve port 11 and name this working position the upper limit.
  • the “up” and “down” in the upper and lower limits do not have the concept of orientation, but are named for convenience of description.
  • the stator assembly (not shown) includes a coil and other components, which are used to generate a magnetic field after being energized, and under the action of the magnetic field force, the rotor 51 is driven to rotate, thereby realizing the rotation of the screw 31.
  • the electronic expansion valve 100 is an electric electronic expansion valve
  • the rotor 51 is a motor rotor made of a permanent magnet in a stepper motor
  • the stator assembly is a stepper motor.
  • the motor stator, the stepper motor transmits the signals to the coils of each phase of the motor stator after receiving the logical digital signals provided by the control circuit.
  • the motor rotor made of permanent magnets is subject to the magnetic moment to generate rotational movement, thereby achieving the stator assembly to drive the rotor assembly. Movement process of rotation.
  • the electronic expansion valve 100 in the present application uses an integrated valve seat.
  • the integrated valve seat is used to integrate a valve seat and a sleeve seat of a conventional electronic expansion valve, thereby reducing the electronic expansion valve 100 in the axial direction.
  • the number of assembly times that is, the possibility of reducing the coaxiality of each component of the electronic expansion valve 100 due to multiple assembly is reduced, the coaxiality between the various components of the electronic expansion valve 100 is increased, and due to the number of components
  • the reduction, the opening performance of the electronic expansion valve 100 can be guaranteed, the installation is more convenient, and the reliability and stability of the entire product are improved.
  • valve port 11 is disposed coaxially with the valve body 10, and an end on which the valve port 11 is provided is named a first end 104 of the valve body 10.
  • the opposite end of the end 104 is named the second end 105, and the valve port 11 is opened and opened in a direction in which the second end 105 points to the first end 104.
  • the valve port of the valve body 10 Due to the machining method of the upper end feeding, the valve port of the valve body 10 only needs to be clamped once during processing, which reduces the number of clamping times of the valve port 10 of the valve body 10 in the manufacturing process, that is, the valve body 10 is reduced. The positioning error of the valve port 11 during processing improves the coaxiality between the valve port 11 and the valve body 10.
  • valve port 11 is directly opened on the valve body 10, compared with the conventional electronic expansion valve, the welding and fixing between the valve seat core and the valve body that open the valve port are reduced, and the reduction in the number of welding improves the valve.
  • the integrity of the body 10 improves the reliability and stability of the electronic expansion valve 100.
  • One end of the valve port 11 adjacent to the second end 105 of the valve body 10 is provided with a first chamfer 106. Due to the opening of the first chamfer 106, the portion of the valve port 11 adjacent to the second end 105 of the valve body 10 forms an open structure. It can improve the sealing performance of the valve needle 22 in the valve port 11, reduce the internal leakage of the electronic expansion valve 100, and improve the accuracy of the electronic expansion valve 100's control over the fluid flow.
  • a second chamfer 107 is provided at one end of the valve port 11 away from the second end 105 of the valve body 10. Due to the opening of the first chamfer 106 and the second chamfer 107, the carry-out during the processing of the valve port 11 is eliminated. The burr makes the fluid medium have more flow characteristics when passing through the valve port 11.
  • both the first chamfer 106 and the second chamfer 107 are less than 0.1 mm.
  • the wall thickness of the valve body 10 in contact with the guide sleeve 16 is 30% to 80% of the radius of the valve body 10.
  • the wall thickness of the valve body 10 in contact with the guide sleeve 16 is set to 30% to 80% of the radius of the valve body 10, which can better isolate noise and seal the noise of the fluid medium in the interior of the valve body 10.
  • the wall thickness of the valve body 10 is too small, which is relatively ineffective in storing noise; the wall thickness of the valve body 10 is too large, which is not conducive to the fixed installation of the valve needle assembly 20 and other components in the valve body 10.
  • the wall thickness dimension of the valve body 10 in contact with the guide sleeve 16 is 80% of the radius dimension of the valve body 10.
  • a noise reduction module 60 is provided between the outlet pipe 102 and the valve body 10, and the noise reduction module 60 is used to improve the stability of the fluid medium flowing through the valve port 11, thereby reducing turbulence during the use of the electronic expansion valve 100 noise.
  • the valve body 10 is provided with an accommodating cavity 10f communicating with the valve port 11, and the accommodating cavity 10f is used for accommodating the noise reduction module 60.
  • One end of the noise reduction module 60 extends outward in a direction perpendicular to the central axis of the valve body 10 and forms a third protrusion 61, and the medium outlet pipe 102 sets a noise reduction correction page (Article 91 of the detailed rules) ISA / CN A part of the module 60 also abuts against the third protrusion 61.
  • One end of the noise reduction module 60 is in contact with the valve body 10, and the other end is resisted by the medium outlet pipe 102.
  • the welding and fixing between the medium outlet pipe 102 and the valve body 10 makes the noise reduction module 60 clamped and fixed to the valve body 10 and The medium exits the tube 102.
  • the noise reduction module 60 may also be fixed between the valve body 10 and the medium outlet pipe 102 by using another structure.
  • the medium outlet pipe 102 may directly resist the noise reduction module 60.
  • the third protrusion 61 formed on the noise reduction module 60 at this time may also be omitted.
  • the noise reduction module 60 is provided with a noise reduction hole 62.
  • the noise reduction hole 62 is connected to the valve port 11 stop.
  • the noise reduction hole 62 communicates that the aperture of the valve port 11 matches the aperture of the valve port 11 so that the fluid medium passes through the valve.
  • the port 11 enters the noise reduction hole 62 it can flow in smoothly to avoid turbulence when the fluid medium enters the noise reduction hole 62 through the valve port 11.
  • the noise reduction hole 62 is provided coaxially with the valve port 11.
  • the noise reduction hole 62 is a step hole, and the noise reduction hole 62 is gradually expanded in a direction away from the valve port 11.
  • the noise reduction hole 62 is a three-step step hole.
  • the noise reduction hole 62 includes a first hole 621, a second hole 622, and a third hole 623.
  • the first hole 621 is connected to the valve port 11.
  • the first hole 621, the second hole 622, and the third hole 623 penetrate each other in the axial direction.
  • the second hole 622 is located between the first hole 621 and the third hole 623.
  • the diameter of the third hole 623 is larger than that of the second hole 622.
  • a diameter of the second hole 622 is larger than a diameter of the first hole 621.
  • the first hole 621, the second hole 622, and the third hole 623 are symmetrical. Round hole and coaxially arranged.
  • a distance may also be formed between each central axis of the first hole 621, the second hole 622, and the third hole 623.
  • the one hole 621, the second hole 622, and the third hole 623 may also adopt the shape of a special-shaped hole.
  • the noise reduction hole 62 may also adopt two, four, or more structural forms, as long as the noise reduction hole 62 can form a step that gradually expands in a direction away from the valve port 11. Hole.
  • the noise reduction hole 62 is a stepped hole, and the effective cross-section of the fluid medium when the fluid enters the noise reduction hole 62 through the valve port 11 gradually expands in a step shape.
  • the flow velocity of the fluid medium after entering the noise reduction hole 62 decreases, and the fluid medium gradually expands through
  • the noise reduction hole suppresses the generation of the free shearing surface, which also improves the stability of the fluid medium, so that the fluid medium generates less turbulent noise, thereby reducing the noise of the electronic expansion valve 100 during use.
  • the noise reduction hole 62 is a horn hole, and the noise reduction hole 62 includes a cylindrical hole 621a communicating with the valve port 11 and a communication with the cylindrical hole 621a.
  • the hole size of the cylindrical hole 621a matches the hole size of the valve port 11.
  • tapered hole 622a can also be directly docked with the valve port 11, that is, the hole size of the end of the tapered hole 622a facing the valve port 11 matches the hole size of the valve port 11, and at this time, the cylindrical hole 621 can also be Omitted.
  • the opening of the cylindrical hole 621a is equivalent to increasing the length of the valve port 11 and further improving the stability of the fluid medium.
  • the noise reduction hole 62 is a horn hole.
  • the effective cross-section of the fluid medium when the fluid medium enters the noise reduction hole 62 through the valve port 11 is gradually enlarged.
  • the flow velocity of the fluid medium after entering the noise reduction hole 62 is reduced.
  • the holes inhibit the generation of free shearing surfaces, which also improves the stability of the fluid medium, so that the fluid medium generates less turbulent noise, thereby reducing the noise generated by the electronic expansion valve 100 during use.
  • the noise reduction hole 62 is a straight hole, and the noise reduction hole 62 runs through both ends of the noise reduction module 60.
  • Correction page (Article 91 of the detailed rules) ISA / CN It is connected to the valve port 11 on the surface, and the diameter of the noise reduction hole 62 matches the diameter of the valve port 11.
  • the noise reduction hole 62 is a straight hole with a relatively high length.
  • the noise reduction hole 62 is equivalent to extending the length of the valve port 11. This makes the fluid medium flowing through the inlet end of the valve port 11 and the end of the noise reduction hole 62
  • the reduction of the speed gradient and the pressure gradient also improves the stability of the fluid medium and reduces the noise generated by the electronic expansion valve 100 during use.
  • the noise reduction module 60 is modularly fixed in the valve body 10, and the noise reduction module and the valve body 10 are provided separately, which makes it unnecessary for the valve body 10 of the electronic expansion valve 100 to have a relatively complicated shape.
  • the more difficult to process the complex shape of the valve port 11 enables the electronic expansion valve 100 to use a combination of a standardized valve body 10 and a customized noise reduction module to further standardize the components of the electronic expansion valve 100.
  • one end of the medium outlet pipe 102 in contact with the valve body 10 is further provided with a welding ring 108, and two adjacent sides of the welding ring 108 are respectively connected to the valve body 10 and the medium outlet.
  • the tube 102 is in contact, and the welding ring 108 is used to fill the weld 109 between the valve body 10 and the medium outlet tube 102.
  • the welding ring 108 is melted under the high temperature heating of the external welding equipment, the molten filler material flows into the weld 109 formed between the valve body 10 and the medium outlet pipe 102, thereby realizing the welding of the valve body 10 and the medium outlet pipe 102. fixed.
  • the electronic expansion valve 100 is further provided with a welding structure 70, and the welding structure 70 includes a first portion of the valve body 10 adjacent to the medium outlet pipe 102 extending along the direction of the axis 103 of the vertical valve body 10 and formed thereon.
  • the welding structure 70 includes a first portion of the valve body 10 adjacent to the medium outlet pipe 102 extending along the direction of the axis 103 of the vertical valve body 10 and formed thereon.
  • Four protrusions 71, the medium outlet pipe 102 and the fourth protrusion 71 are in contact with each other.
  • the contact surface between the medium outlet pipe 102 and the fourth protrusion 71 is a weld 109 between the valve body 10 and the medium outlet pipe 102, which needs to be filled with welding material. .
  • the formation position of the welding seam 109 is set away from the welding ring 108 and the contact end face of the valve body 10, so that the center of the welding ring 108 and the welding seam 109 It can be coplanar, and the coplanarity between the center of the welding ring 108 and the welding seam 109 is flush, so that the welding ring 108 can smoothly flow into the welding seam 109 during welding, avoiding the occurrence of creep welding and desoldering.
  • the welding structure 70 further includes a convex edge 72 provided on the medium outlet pipe 102.
  • the medium outlet pipe 102 protrudes from the fourth protrusion 71 along the axis 103 direction of the valve body 10 and forms a convex edge 72, that is, the medium outlet pipe
  • the thickness of 102 is greater than the radial extension of the fourth protrusion 71.
  • the welding ring 108 can enter the welding seam 109 along the convex edge 72 in a molten state during welding, which further improves the valve body 10 and the medium outlet pipe 102. Quality of welding.
  • the welding structure 70 further includes a third chamfer 73, a third chamfer 73 connecting the convex edge 72 and the outer side of the medium outlet pipe 102, and a welding ring disposed on an end surface of the medium outlet pipe 102 in contact with the valve body 10.
  • 108 is in contact with the valve body 10 through a third chamfer 73. Due to the opening of the third chamfer 73, an accommodating space 74 for accommodating the welding ring 108 is formed between the valve body 10 and the medium outlet pipe 102.
  • the accommodating space has an open structure, which makes it easier to fix the welding ring 108 to On the valve body 10 and the medium outlet pipe 102, the welding ring 108 can more easily enter the welding seam 109 during welding.
  • the electronic expansion valve 100 is provided with a welding structure 70 on the valve body 10 and the medium outlet pipe 102, so that the center of the welding ring 108 is flush with the welding seam 109, and the welding ring 108 can be smoothly melted during welding.
  • the inflow into the weld seam 109 improves the welding forming quality between the valve body 10 and the medium outlet pipe 102, and improves the reliability and stability of the electronic expansion valve 100.
  • the electronic expansion valve 100 further includes a pressure balancing channel 80, which is used to balance the pressure of the medium at the inlet 10a with the internal pressure of the electronic expansion valve 100, This can not only avoid the impact of the fluid medium on the guide sleeve 16 and reduce noise; at the same time, when the pressure of the medium at the inlet 10a changes, the pressure balance passage 80 can make the inside of the electronic expansion valve 100 The pressure is quickly balanced with the pressure at the inlet, to avoid the phenomenon of extra load inside the electronic expansion valve 100, and to improve the stability of the operation of the electronic expansion valve 100.
  • the pressure balance channel 80 is provided between the guide sleeve 16 and the valve body 10, and the pressure balance channel 80 is used to connect the inside of the guide sleeve 16 and the valve
  • the bodies 10 communicate with each other to balance the pressure of the fluid medium at the inlet 10a and the pressure of the fluid medium between the inside of the guide sleeve 16.
  • a pressure balance passage 80 is provided on the guide sleeve 16, and the pressure balance passage 80 communicates between the valve cavity 12 and the guide hole 16a to balance The pressure between the wide cavity 12 and the guide hole 16a, so that when the correction page (Article 91 of the detailed rules) ISA / CN
  • the valve port 11 When the valve port 11 is opened, the fluid medium enters the valve chamber 12, and at the same time, a part of the fluid medium enters the guide hole 16a through the pressure balance channel 80, so as to connect the guide hole 16a and the valve chamber 11
  • This can not only avoid the impact of the fluid medium on the guide sleeve 16 and reduce noise; at the same time, when the system pressure changes, the internal pressure of the electronic expansion valve 100 can be quickly balanced to avoid additional load due to the pressure difference. To improve the operation stability of the electronic expansion valve 100.
  • the pressure between the valve chamber 12 and the guide hole 16a is balanced by a pressure balancing channel 80; that is, the valve chamber 12 and the internal cavity of the electronic expansion valve 100 are balanced.
  • the pressure in other parts of 12 is to make the entire interior of the electronic expansion valve 100 in a pressure-balanced state, so as to avoid the phenomenon of additional load inside the electronic expansion valve 100.
  • the pressure balance channel 80 includes at least one pressure balance hole 80a; the pressure balance hole 80a communicates the wide cavity 12 and the guide hole 16a with each other. Therefore, a part of the fluid medium passes through the pressure balancing hole 80a and enters the guide hole 16a, so as to achieve the purpose of balancing pressure.
  • the pressure balance hole 80a has an axis, and the axis of the pressure balance hole 80a is disposed parallel to the axis X. That is, it can be understood that the pressure balance hole 80a is vertically opened on the guide sleeve 16, so that the pressure balance hole 80a does not affect the direction of the fluid medium flow, and eliminates the noise caused by the change of the fluid medium flow direction.
  • the number of the pressure balancing holes 80a is two, and the two pressure balancing holes 80a are evenly distributed on the guide sleeve 16 along the circumferential direction of the axis X.
  • the number of the pressure balancing holes 80a may also be 3, 4, etc.
  • the specific number of the pressure balancing holes 80a may be set according to actual needs.
  • each of the pressure balancing holes 80a is a circular pressure balancing hole.
  • the pressure balancing hole 80a may also have other shapes.
  • the pressure balancing hole 80a is a rectangular or polygonal pressure balancing hole.
  • the pressure balancing channel 80 is provided between the mounting base 110, the guide sleeve 16 and the nut sleeve 32 to Communicate the inlet 10a with the inside of the guide sleeve 16, the inside of the mounting base 110, the inside of the nut sleeve 32, and the inside of the sleeve 40, so that the pressure of the fluid medium at the inlet 10a and the The fluid medium pressure balance between the inside of the guide sleeve 16, the inside of the mounting base 110, the inside of the nut sleeve 32 and the inside of the sleeve 40.
  • the pressure balance channel 80 includes a first balance channel 81 and a second balance channel 82.
  • the first balance channel 81 is used to connect the inlet 10a with the inside of the guide sleeve 16, and the inside of the screw assembly 30.
  • the interior of the sleeve 40 communicates with each other;
  • the second balance channel 82 is configured to communicate the interior of the mounting base 110 with the first balance channel 81 so as to pass through the first balance channel 81 and the first
  • the two balance channels 82 communicate with each other inside the guide sleeve 16, the inside of the mounting base 110, the inside of the nut sleeve 32, the inside of the sleeve 40 and the inlet.
  • the first balance channel 81 includes a first balance hole 811 and a second balance hole 812, and the first balance hole 811 is opened in the guide sleeve 16 to connect the inside of the guide sleeve with all
  • the valve cavity 12 communicates with each other
  • the second balance hole 812 is opened in the nut sleeve 32 to communicate the inside of the sleeve 40 with the inside of the nut sleeve 32 so as to realize the valve cavity 12 and
  • the inside of the guide sleeve 16, the inside of the nut sleeve 32, and the inside of the sleeve 40 communicate with each other to achieve the purpose of balancing pressure.
  • the first balance hole 811 has an axis, and the axis of the first balance hole 811 is disposed parallel to the axis 103. That is, it can be understood that the first balance hole 811 is vertically opened on the guide sleeve 16, so that the first balance hole 811 does not affect the direction of the fluid medium flow, and eliminates the noise caused by the change of the fluid medium flow direction. .
  • the number of the first balance holes 811 is two, and the two first balance holes 811 are evenly distributed on the guide sleeve 16 along the circumferential direction of the axis 103.
  • the number of the first balancing holes 811 may also be 3, 4, etc.
  • the specific number of the first balancing holes 811 may be set according to actual needs.
  • Each of the first balancing holes 811 is a circular pressure balancing hole.
  • the first balance hole 811 may also have a page correction (Article 91 of the detailed rules).
  • ISA / CN In other shapes. For example, rectangular, polygonal pressure balance holes.
  • the second balance hole 812 has an axis, and the axis of the second balance hole 812 is perpendicular to the axis of the first balance hole 811. Of course, in other embodiments, the axis of the second balance hole 812 may not be perpendicular to the axis of the first balance hole 811.
  • the second balance channel 82 includes the third balance hole 821, the third balance hole 821 is provided on the connecting piece 17, and the third balance hole 821 is used to mount the mounting seat.
  • the inside of 110 is in communication with the inside of the sleeve body 40, and the third balance hole 821 also serves as the spring 531. One end of the spring 531 extends into the third balance hole 821.
  • the inside of the mounting base 110 is communicated with the first balance channel 8] through the third balance hole 821, and the fluid medium at the inlet 10a passes through the first balance channel 81 and the third The balance hole 821 enters the inside of the mounting base 110.
  • the third balance hole 82] is a slot hole, and the third balance hole 821 is opened in a direction perpendicular to the axis of the valve body.
  • the number of the third balancing holes 821 is plural.
  • the number of the third balance holes 821 is two, and the two third balance holes 821 are symmetrically disposed about the valve body axis.
  • the second balance channel 82 may further include a fourth balance hole 822 and a fifth balance hole 823, and the fourth balance hole 822 is opened in the guide sleeve.
  • a fifth balance hole 823 is opened on the nut sleeve 32, and the fourth balance hole 822 is in communication with the fifth balance hole 823, so that the fourth balance hole 822 and the fifth balance hole 823 can
  • the inside of the guide sleeve 16 communicates with the inside of the mounting base 110.
  • a fourth balance hole 822 and a fifth balance hole 823 the speed of medium pressure balance between the inside of the mounting base 110 and the inlet 10a can be increased.
  • the fourth balance hole 822 is opened on the second cylindrical section 163, the fifth balance hole 823 is opened on the mating section 321, and the fourth balance hole 822 and The fifth balance hole 822 realizes the communication between the mounting hole 11 and the guide hole 16a, thereby further achieving the communication between the inside of the mounting base 110 and the first balance channel 81.
  • the fourth balance hole 822 has an axis
  • the fifth balance hole 822 has an axis
  • the axis of the fourth balance hole 822 and the axis of the fifth balance hole 822 are coincident with each other
  • the fourth balance The axis of the hole 822 is perpendicular to the axis of the first balance hole 811.
  • the axis of the fourth balance hole 822 and the axis of the fifth balance hole 822 may not be overlapped, as long as the fourth balance hole 822 and the fifth balance hole can be realized.
  • the communication between 822 is sufficient, and the axis of the fourth balance hole 822 and the axis of the first balance hole 811 may not be perpendicular.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Details Of Valves (AREA)
  • Lift Valve (AREA)
  • Valve Housings (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

一种电子膨胀阀（100），包括阀体（10）、阀针组件（20）、螺杆组件（30）、转子组件（50）、定子组件及套管（40），该阀体（10）的内部设置有用以导向该阀针组件（20）运动的导向套（16），该阀针组件（20）设置于该导向套（16）上，该螺杆组件（30）连接于该转子组件（50），该定子组件作用于该转子组件（50）并能够驱动该转子组件（50）转动，该转子组件（50）的转动能够带动该螺杆组件（30）运动，该阀体（10）上开设有阀口（11），该阀针组件（20）在该螺杆组件（30）的带动下封闭或开启该阀口（11），该套管（40）套设于该阀体（10）远离该阀口（11）的一端。

Description

电子膨胀阀 相关申请
[0001 ] 本申请要求 2018年 08月 17 日申请的， 申请号为 2018213376030 , 名称为“电子膨胀阀”、 2018 年 08月 17日申请的， 申请号为 2018213353433 , 名称为“电子膨胀阀”、 2018年 08月 17日申请的， 申请 号为 2018213375841 , 名称为“电子膨胀阀”、 2018年 08月 17日申请的， 申请号为 2018213357716, 名称 为“电子膨胀阀”、 2018年 08月 17日申请的， 申请号为 2018213352750, 名称为“电子膨胀阀”、 2018年 08 月 17日申请的， 申请号为 2018109433995 , 名称为“电子膨胀阀”、 2018年 08月 17日申请的， 申请号为 2018109434023 , 名称为“电子膨胀阀及使用该电子膨胀阀的空调系统”、 2018年 08月 17日申请的， 申请 号为 2018213355354 ,名称为“电子膨胀阀及使用该电子膨胀阀的空调系统”、 2018年 08月 17日日申请的， 申请号为 2018109416190， 名称为“电子膨胀阀及使用该电子膨胀阀的空调系统”、 2018年 08月 17日申请 的， 申请号为 2018213352892， 名称为“电子膨胀阀及使用该电子膨胀阀的空调系统”、 2018年 08月 17 0 申请的， 申请号为 2018109427462, 名称为“电子膨胀阀及使用该电子膨胀阀的空调系统”、 2018年 08月 17日申请的， 申请号为 201821335213X , 名称为‘‘电子膨胀阀及使用该电子膨胀阀的空调系统”中国专利申 请的优先权， 在此将其全文引入作为参考. 技术领域
[0002] 本发明涉及制冷技术领域， 特別是涉及一种电子膨胀阀。 背景技术
[0003] 电子膨胀阀通过阀杆组件在导向套及螺母套内的运动打开或关闭开设于阀体上的阀口， 从而实现 调节流量和节流降压的目的， 在制冷设备技术领域中应用广泛. 现有的电子膨胀阀安装繁琐， 降低了电子 膨胀阀的可靠性与稳定性. 发明内容
[0004] 基于此， 根据本申请的各种实施例， 提供一种电子膨胀阀.
[0005] 本申请的技术方案如下：
[0006] 一种电子膨胀阀， 包括阀体、 阀针组件、 螺杆组件、 转子组件、 定子组件及套管， 所述阀体的内 部设置有用以导向所述阀针组件运动的导向套， 所述阀针组件设置于所述导向套上， 所述螺杆组件连接于 所述转子组件， 所述定子组件作用于所述转子组件并能够驱动所述转子组件转动， 所述转子组件的转动能 够带动所述螺杆组件运动， 所述阀体上开设有阀口， 所述阀针组件在所述螺杆组件的带动下封闭或开启所 述阀口， 所述套管套设于所述阀体远离所述阀口的一端。
[0007] 本申请的一个或多个实施例的细节在下面的附图和描述中提出. 本申请的其它特征、 目的和优点 将从说明书、 附图以及权利要求书变得明显。 ’’但同时要保证实施例部分记载了与原技术效果和优点相对 应的表述。 附图说明
[0008] 图 1为根据一实施方式提供的电子膨胀阀的立体图：
[0009] 图 2为根据一实施方式提供的电子膨胀阀的剖视图：
[0010] 图 3为根据另一实施方式提供的电子膨胀阀的立体图: 更正页 （细则第 91条） ISA/CN [001 1 ] 图 4为根据图 3提供的电子膨胀阀的剖视图；
[0012] 图 5为根据一实施方式提供的阀体的剖视图；
[0013] 图 6为根据一实施方式提供设有第二安装台阶的阀体的剖视图；
[0014] 图 7为根据另一实施方式提供的阀体的剖视图；
[0015] 图 8为根据一实施方式提供的设有储屑结构的阀体的剖视图；
[0016] 图 9为根据图 8提供的 B处放大图；
[0017] 图 10为根据一实施例提供的设有限位部的阀体的剖视图；
[0018] 图 11为根据图 10提供的 C处放大图；
[0019] 图 12为根据另一实施方式提供的储屑结构的剖视图；
[0020] 图 13为根据图 12提供 D处放大图；
[0021 ] 图 14为根据一实施方式提供的导向套的剖视图；
[0022] 图 15为根据另一实施方式提供的导向套的剖视图；
[0023] 图 16为根据又一实施方式提供的导向套的剖视图；
[0024] 图 17为根据一实施方式提供的省略套管及阀体的电子膨胀阀的立体图；
[0025] 图 18为根据一实施方式提供的螺杆组件的立体图；
[0026] 图 19为根据一实施方式提供的阀针组件以及螺杆组件的剖视图；
[0027] 图 20为根据另一实施方式提供的电子膨胀阀的剖视图；
[0028] 图 21为根据图 20提供的阀针组件的剖视图；
[0029] 图 22为根据一实施方式提供的设有降噪模块的电子膨胀阀的剖视图；
[0030] 图 23为根据一实施方式提供的开设有容置腔的阀体的剖视图；
[0031] 图 24为根据一实施方式提供的降噪模块的剖视图；
[0032] 图 25为根据另一实施方式提供的降噪模块的剖视图；
[0033] 图 26为根据又一实施方式提供的降噪模块的剖视图；
[0034] 图 27为根据一实施方式提供的设有焊接结构的电子膨胀阀的剖视图；
[0035] 图 28为根据图 27提供的 E处放大图；
[0036] 图 29为根据图 4提供的 A处放大图；
[0037] 图 30为根据一实施方式提供的导向套的剖视图；
[0038] 图 31为根据一实施方式提供的连接片的立体图；
[0039] 图 32为根据一实施方式提供的连接片的俯视图；
[0040] 图 33为根据一实施方式提供的螺母套的立体图；
[0041 ] 图 34为根据一实施方式提供的螺母套的剖视图。
[0042] 图中， 电子膨胀阀 100、 介质进管 101、 介质出管 102、 轴线 103、 阀体的第一端 104、 阀体的第 二端 105、 第一倒角 106、 第二倒角 107、 焊环 108、 焊缝 109、 阀体 10、 进口 10a、 出口 10b、 安装架 10c、 第一安装台阶 10d、 第二安装台阶 10e、 容置腔 10f、 阀口 11、 阀腔 12、 通孔 13、 安装腔 14、 第一定位台 阶 14a、 限位部 141、 限位部的内侧面 141 a、 限位部的外侧面 141b、 敞口 142、 连接腔 15、 安装座 110、 安装孔 111、 导向套 16、 导向孔 16a、 阀针孔 16b、 平面 161、 第一圆柱段 162、 台阶 162a、 第一圆柱段的 第一端 162b； 第一圆柱段的第二端 162c、 第二圆柱段 163、 第三圆柱段 164、 导向结构 165、 凸台 166、 连接片 17、第一凸起 18、连接槽 19、储屑结构 120、第一储屑槽 121、第一导屑结构 122、第一导屑部 122a、 第二储屑槽 123、 第二导屑结构 124、 第二导屑部 124a、 阀针组件 20、 阀针套 21、 阀针 22、 凹槽 221、 第 一弹簧座 23、 第二弹簧座 24、 弹性件 25、 导向座 26、 滚珠 27、 螺杆组件 30、 螺杆 31、 第二凸起 311、 更正页 （细则第 91条） ISA/CN 螺母套 32、 螺母套的第一端 32a、 螺母套的第二端 32b、 卡接槽 32c、 配合段 321、 配合孔 321a、 第二定位 台阶 322、 止挡台 323、 套管 40、 转子组件 50、 转子 51、 转接板 52、 限位件 53、 弹簧 531、 止挡部 531a、 止挡圈 532、 导动片 54、 降噪模块 60、 第三凸起 61、 降噪孔 62、 第一孔 621、 第二孔 622、 第三孔 623、 圆柱孔 621a、 锥形孔 622a、 焊接结构 70、 第四凸起 71、 凸边 72、 第三倒角 73、 压力平衡通道 80、 压力 平衡孔 80a、 第一平衡通道 81、 第一平衡孔 811、 第二平衡孔 812、 第二平衡通道 82、 第三平衡孔 821、 第四平衡孔 822、 第五平衡孔 823。 具体实施方式
[0043] 下面结合附图和具体实施方式对本申请做进一步详细的说明。
[0044] 如图 1及图 2所示， 本申请提供一种电子膨胀阀 100, 所述电子膨胀阀 100应用于空调制冷系统 中， 用以调节流体介质的流量及压力。 在本实施方式中， 流经所述电子膨胀阀 100的流体介质为空调制冷 系统中用以进行冷热交换的冷媒， 所述电子膨胀阀 100用以将高温高压的液态冷媒进行节流降压成低温低 压的气液两相冷媒进行换热实现制冷目的。
[0045] 所述电子膨胀阀 100包括阀体 10、 阀针组件 20、 螺杆组件 30、 套管 40、 转子组件 50以及定子 组件（图未示）， 所述阀针组件 20、 所述螺杆组件 30以及所述套管 40安装于所述阀体 10上， 所述螺杆组 件 30的一端与所述阀针组件 20连接， 另一端与所述转子组件 50连接， 所述转子组件 50设于所述套管 40 内， 所述定子组件设于所述套管 40上， 所述定子组件通电产生磁场， 并在该磁场力的作用的下使所述转 子组件 50转动， 所述转子组件 50带动所述螺杆组件 30运动， 从而所述螺杆组件 30带动所述阀针组件 20 运动， 实现所述电子膨胀阀 100的开启或关闭， 以达到调节流量及压力的目的。
[0046] 如图 5所示， 所述阀体 10由不锈钢材质加工制造。 当然， 阀体 10还可以由其他材料加工制造。 在本实施方式中， 就不在一一举例。 所述阀体 10大致呈圆柱形， 当然， 在其他实施方式中， 所述阀体 10 还可以呈其他形状。
[0047] 所述阀体 10具有轴线 103, 所述阀体 10上沿着所述轴线 103依次开设有阀口 11、 阀腔 12、 通孔 13、 安装腔 14以及连接腔 15。 所述阀口 11用以供所述阀针组件 20伸入， 从而控制所述阀口 11处流体介 质的流量， 当所述阀针组件 20封闭所述阀口 11， 即所述阀口 11与所述阀腔 12断开连通， 所述电子膨胀 阀 100关闭； 当所述阀针组件 20解除对所述阀口 11的密封， 即所述阀口 11与所述阀腔 12相互连通， 所 述电子膨胀阀 100打开。 所述通孔 13开设于所述安装腔 14的底部， 所述通孔 13孔径小于所述安装腔 14 的内径。应该可以理解的是，所述通孔 13的设置使得所述安装腔 14的底部形成环形状的第一定位台阶 14a， 所述安装腔 14以及连接腔 15沿轴线 103方向互相连通。
[0048] 所述阀体 10上还开设有用以供流体介质进入的进口 10a， 以及出口 10b- 所述阀口 11设于所述 进口 10a以及出口 10b之间， 所述进口 10a与所述阀腔 12连通设置， 所述出口 10b与所述阀口 11连通， 控制所述阀针组件 20运动， 从而实现所述进口 10a与所述出口 10b之间的导通或者封闭。
[0049] 优选地， 所述进口 10a处安装有用以输送流体介质的介质进管 101 , 所述出口 10b处安装有用以 输送流体介质的介质出管 102。 在本实施方式中， 所述流体介质为冷媒， 所述冷媒从所述介质进管 101流 入所述电子膨胀阀 100, 经所述电子膨胀阀 100的节流降压， 从所述介质出管 102排出。
[0050] 进一步地， 如图 6所示， 所述阀体 10远离所述套管 40的一端凸设有用以安装所述介质出管 102 的第一凸起 18, 所述出口 10b沿轴线 103贯穿于所述第一凸起 18 , 所述出口 10b与所述阀口 11连通， 在 本实施方式中， 所述介质出管 102与阀体之间焊接连接。
[0051 ] 优选地， 所述阀体 10远离所述套管 40的一端开设有连接槽 19, 所述第一凸起 18位于所述连接 槽 19的槽底， 所述介质出管 102—端套设于所述第一凸起 18并与所述连接槽 19的槽底相抵靠。 在这里， 更正页 （细则第 91条） ISA/CN 通过设置连接槽 19能够方便于所述介质出管 102与所述阀体 10之间的焊接， 并且可以防止焊料流出， 提 高焊接质量。
[0052] 所述阀体 10上设有导向套 16、 以及连接片 17。 所述导向套 16安装于所述安装腔 14内并与所述 安装腔 14之间过盈配合。在这里， 所述过盈配合是指： 安装腔 14内径的尺寸减去相配合的所述导向套 16 外径的尺寸为负值。 所述导向套 16用于引导所述阀针组件 20沿着阀体 10的轴线 103方向运动。 所述连 接片 17安装于所述连接腔 15内， 用以安装所述螺杆组件 30。 优选地， 所述连接片 17通过焊接方式安装 于所述连接腔 15内。
[0053] 进一步地， 所述阀体上设有第一安装台阶 10d,所述第一安装台阶 10d位于所述阀体 10开设连接 腔 15的一端， 所述套管 40安装于所述第一安装台阶 10d上。
[0054] 在一实施方式中， 如图 3、 图 4以及 6所示， 所述阀体 10上可以设置安装座 110, 所述套管 40 安装于所述安装座 110上。 所述导向套 16的一端安装于所述安装腔 14内并与所述安装腔 14之间过盈配 合， 另一端从所述安装腔 14内伸出与所述螺杆组件 30连接， 所述连接片 17安装于安装座 110上。
[0055] 进一步地， 所述安装座 110大致呈圆柱形， 所述安装座 110通过焊接的方式焊接于所述阀体 10 上， 当然， 在其他实施方式中， 所述安装座 110还可以通过其他方式与所述阀体 10连接。 所述套管 40通 过焊接的方式焊接于所述安装座 110上， 并与所述安装座 110之间密封连接， 所述安装座 110上开有安装 孔 111， 所述螺杆组件 30的部分伸入所述安装孔 111内以与所述导向套 16连接。
[0056] 在本实施方式中， 通过设置安装座 110 , 所述安装座 110代替所述阀体 10的部分功能， 用以安装 所述螺杆组件 30以及套管 40, 从而可以降低所述阀体 10的重量， 并且降低所述阀体上阀口 11的加工难 度， 保证了阀体 10以及阀口 11的加工精度， 提高了所述电子膨胀阀 100流量的控制精度。
[0057] 优选地，所述阀体 10上设有第二安装台阶 10e,所述安装座 110焊接于所述第二安装台阶 10e上。 阀体 10与所述安装座 110之间可以采用一体式结构， 也可以采用分体式结构， 在本实施方式中， 所述阀 体 10与所述安装座 110之间采用的是分体式结构。
[0058] 在一实施方式中， 如图 10以及图 14所示， 所述安装腔 14远离所述阀口 11一端的周向具有限位 部 141。所述配合部 161用以与所述限位部 141配合以实现所述导向套 16的沿轴线 103方向的定位， 从而 防止导向套 16在流体介质的高压、 流体介质高 /低温等因素下沿着所述轴线 103松脱而产生噪音。
[0059] 进一步地， 所述限位部 141呈环状， 所述限位部 141的内径小于所述安装腔 14的内径。 优选地， 所述限位部 141沿轴线 X所在平面的截面呈梯形或弧形。所述限位部 141较大内径的一端靠近所述安装腔 14设置， 所述限位部 141较小内径的一端远离所述安装腔 14设置。
[0060] 所述限位部 141具有相对设置的用以与所述导向套 16抵持的内侧面 141a以及外侧面 141b。所述 限位部的内侧面 141 a与所述安装腔 14的内壁之间形成夹角 a。应该可以理解的，所述限位部的内侧面 141 a 与所述安装腔 14的内壁之间形成夹角 a相当于形成限制所述导向套 16沿 X轴运动的轴肩。
[0061 ] 优选地， 所述夹角 a的范围为： 120°sasl 60°。 从而在这个角度范围下， 既能使所述导向套 16安 装于所述安装腔 14内， 又能限制所述导向套 16沿 X轴方向运动。 具体地， 在本实施方式中， 所述夹角 a=160。。
[0062] 所述限位部 141可以与所述阀体 10设为一体式结构， 也可以与所述阀体 10分体式设置。 所述限 位部 141与所述阀体 10设为一体式结构， 可便于所述阀体 10的加工和制造， 以降低生产成本。 所述限位 部 141与所述阀体 10分体式设置， 可便于所述导向套 16的安装。 而上述的两种所述限位部 141与所述阀 体 10之间的设置方式各有优点， 具体地的限位部 141设置方式可以更具实际的需求而设置。
[0063] 当然， 在其他实施方式中， 所述限位部 141可以被设置成挡块。 此时， 所述挡块所述阀体 10之 间的夹角可以为 90度。 所述挡块呈环状， 所述挡块通过螺栓等锁紧件安装在所述连接腔 15内。 更正页 （细则第 91条） ISA/CN [0064] 如图 14所示， 所述导向套 16采用黄铜材质加工制造， 即为黄铜导向套， 黄铜材质的导向套相对 较软， 可便于所述导向套 16与所述螺杆组件 30或者所述阀体 10之间的安装， 并且可以减少流体介质与 所述导向套 16撞击发出的噪音。 可以理解， 在其他的实施方式中， 所述导向套 16也可以采用除黄铜之外 的其他材料加工制造而成。
[0065] 所述导向套 16大致呈圆柱状， 所述导向套 16与所述阀口 11之间间隔设置， 且所述导向套 16靠 近所述阀口 11一端的端面为平面 161。在这里， 所述平面 161为平滑面或者光滑面， 即所述平面 161的摩 擦系数较低， 从而当流体介质经过所述平面 161， 能够沿着所述平面 161流动， 以进一步降低流体的噪音。
[0066] 所述导向套 16具有轴线 Y， 所述导向套 16上沿所述轴线 Y开设有导向孔 16a、 阀针孔 16b。 所 述阀针孔 16b的孔径小于所述导向孔 16a的孔径。 所述阀针孔 16b位于所述导向孔 16a的底部并与所述导 向孔 16a之间连通。
[0067] 应该可以理解的是，由于所述阀针孔 16b的孔径小于所述导向孔 16a的孔径；从而所述导向孔 16a 的底部结合所述阀针孔 16b形成限位台阶 161a； 所述阀针组件 20安装于所述导向孔 16a内， 并在所述导 向孔 16a以及所述阀针孔 16b的导向下运动。
[0068] 进一步地， 如图 4以及图 12所示， 所述导向套 16可以为三段式结构， 在本实施方式中， 所述导 向套 16包括安装于所述安装腔 14内的第一圆柱段 162、伸入所述安装孔 111内用以与所述螺杆组件 30配 合的第二圆柱段 163、 以及位于所述阀腔 12内的第三圆柱段 164, 在其他实施方式中， 所述导向套 16也 可以为两段式结构。
[0069] 所述第一圆柱段 162与所述安装腔 14之间过盈配合， 以保证在所述导向套 16安装的过程中， 所 述导向套 16的自身的轴线与阀体 10的轴线 Y重合设置， 从而保证导向套 16与阀口 1 1之间的同轴度。
[0070] 优选地， 所述第一圆柱段 162为中间段， 即位于所述第二圆柱段 163和第三圆柱段 164之间， 所 述第一圆柱段 162的外径分别大于所述第二圆柱段 163的外径、 第三圆柱段 164的外径。 应该可以理解的 是， 所述第一圆柱段 162分别与所述第二圆柱段 163、 所述第三圆柱段 164之间形成台阶 162a， 所述第一 圆柱段 162与所述第二圆柱段 163之间的台阶 162a与所述安装腔 14的底部第一定位台阶 14a配合， 以实 现所述第二圆柱段 163定位。
[0071 ] 进一步地， 在一实施方式中， 所述第一圆柱段 162具有相对设置的第一端 162b及第二端 162c; 所述第二圆柱段 163连接于所述第一圆柱段的第二端 162c。 所述第一圆柱段的第一端 162b的端面为平面 161。 所述轴线 Y垂直于所述平面 161。 而由于所述第一圆柱段的第一端 162b的端面为平面 161， 从而可 以减少流体介质与所述第二圆柱段 163接触之间接触的摩擦力， 进而减少噪音的产生， 提高用户使用的舒 适性。
[0072] 优选地， 所述第一圆柱段的第一端 162b的端面抵靠于所述安装腔 14的底部， 从而以实现所述导 向套 16的安装。 进一步地， 所述第一圆柱段的第一端 162b周向具有导向结构 165。 在这里， 设置所述导 向结构 165 , 可以便于所述导向套 16的安装。进一步地， 所述第二圆柱段 163远离所述第一圆柱段 162的 一端的周向也具有所述导向结构 165a。
[0073] 具体地， 所述导向结构 165包括设于所述第一圆柱段的第二端 162c的导向部 165a。 优选地， 导 向部 165a为圆角导向部或者圆锥导向部。 当然， 在其他实施方式中， 所述导向结构 165还可以为其他结 构。
[0074] 如图 15所示， 在另一实施方式中， 所述导向套 16的结构基本与所述的实施方式中的所述导向套 16的结构基本一致， 其不同点在于， 所述第一圆柱段的第一端 162b的端面上设有凸台 166, 所述凸台 166 远离所述第一圆柱段的一端的端面为所述平面 161。 所述凸台 166伸入所述通孔 13中， 并且所述平面 161 抵靠于所述第一定位台阶 14a上， 从而以实现所述导向套 16的定位以及安装。 更正页 （细则第 91条） ISA/CN [0075] 如图 16所示， 在又一实施方式中， 所述导向套 16的结构基本与所述的实施方式中的所述导向套 16的结构基本一致， 其不同点在于， 所述第一圆柱段的第一端 162b设有所述第三圆柱段 164, 所述第三 圆柱段 164与所述阀口 11之间间隔设置； 所述第三圆柱段 164远离所述第一圆柱段 162的一端为所述平 面 161。 所述第三圆柱段 164的外径小于所述第二圆柱段 163的外径， 且与所述第二圆柱段 163之间也形 成所述台阶 162a。 所述第三圆柱段 164从所述通孔 13伸入所述阀腔 12内。 优选地， 所述第三圆柱段 164 呈阶梯状。
[0076] 进一步地， 所述第二圆柱段 163的长度为所述导向套的长度的 1/4-1/3倍。在这里， 由于所述第二 圆柱段 163的长度为所述导向套的长度的 1/4-1/3倍； 从而可以理解的是， 可以使导向套 16具有足够的配 合尺寸与所述螺杆组件 30配合，提高连接的可靠性， 同时降低因震动等原因导向套 16松脱的风险， 当然, 所述第三圆柱段 164的加长， 从而增大了导向孔 16a的整体的长度， 所述阀针组件 20安装于所述导向孔 16a内， 提高所述阀针组件 20的整体同轴度。
[0077] 优选地， 所述第二圆柱段 163的长度为所述导向套 16长度的 3/10倍。 可以理解的是， 所述第二 圆柱段 163的长度大致占所述导向套 16长度的 1/3倍，从而可以进一步地提高第二圆柱段 163与所述螺杆 组件 30之间连接的可靠性性。
[0078] 所述第三圆柱段 164远离所述第一圆柱段 162的一端也具有导向结构。 在这里， 设置所述导向结 构， 可以便于所述导向套 16的安装。 具体地， 所述导向结构为设于所述第一圆柱段 162、 所述第三圆柱段 164上的倒角或者锥面等结构。
[0079] 进一步地， 所述连接片 17与所述阀体 10焊接连接， 所述阀体 10上还设有安装架 10c, 所述安装 架 10c设于所述阀体 10或者所述阀体 10与所述安装座 110之间的连接处，所述安装架 10c与所述阀体 10 焊接连接， 或者分别与所述阀体 10、 安装座 110之间焊接连接， 所述安装架 10c与外部设备配合以实现所 述电子膨胀阀 100的安装。
[0080] 进一步地，如图 8所示，所述阀体 10与所述导向套 16之间设有储屑结构 120,所述储屑结构 120 用以储存所述阀体 10与所述导向套 16之间的碎屑。从而避免在所述导向套 16安装过程中， 所述阀体 10、 导向套 16上的碎屑以杂质的形式进入所述电子膨胀阀 100, 影响电子膨胀阀 100的正常工作。
[0081 ] 在一实施方式中， 如图 9所示， 所述安装腔 14具有内壁， 所述储屑结构 120包括开设于所述安 装腔 14的内壁周向的第一储屑槽 121。
[0082] 优选地， 所述第一储肩槽 121可以设置多个， 多个所述第一储屑槽 121沿所述阀体 10的轴线 X 间隔地设于所述安装腔 14的内壁上。每个所述第一储屑槽 121的槽口处具有第一导屑结构 122, 从而以便 引导所述阀体 10、 所述导向套 16上的碎屑进入所述第一储屑槽 121内。
[0083] 具体地， 所述第一导屑结构 122包括设于所述安装腔 14内壁上的第一导屑部 122a， 所述第一导 屑部 122a位于所述第一储屑槽 121的槽口处。 优选地， 所述第一导屑部 122a位于斜面导屑部或者圆角导 肩部等。
[0084] 进一步地， 所述安装腔 14具有敞口 142, 所述敞口 142远离所述阀口 11设置。 所述第一储屑槽 121靠近于所述安装腔 14的敞口 142端设于所述安装腔 14的内壁上。 从而在满足装配要求的前提下， 尽 可能地减小所述导向套 16与所述安装腔 14的敞口 142端的配合段角度， 以减少碎屑的挤出。
[0085] 在另一实施方式中， 如图 12、 图 13所示， 所述导向套 16具有外壁， 所述储屑结构 120包括开设 于所述导向套的外壁周向的第二储屑槽 123。
[0086] 优选地，所述第二储屑槽 123设于所述第一圆柱段 162的外壁上。进一步地，所述第二储屑槽 123 靠近于所述第一圆柱段 162的第二端 162c设置。 可以理解是， 即在所述第一圆柱段 162的第二端 162c设 置成较短的与所述安装腔 14之间的过盈配合段， 以减少碎屑的挤出。 更正页 （细则第 91条） ISA/CN [0087] 进一步地， 所述第二储屑槽 123可以设置多个。 多个所述第二储屑槽 123沿所述导向套 16的轴 线 Y间隔地设于所述第一圆柱段 162的外壁上。每个所述第二储屑槽 123的槽口处具有第二导屑结构 124, 从而以便引导所述阀体 10、 所述导向套 16上的碎肩进入所述第二储屑槽 123内。
[0088] 具体地， 所述第二导屑结构 124包括设于所述导向套 16外壁上的第二导屑部 124a, 所述第二导 屑部 124a位于所述第二储屑槽 123的槽口处。 优选地， 所述第二导肩部 124a位于斜面导肩部或者圆角导 屑部等。
[0089] 在又一实施方式中， 所述安装腔 14具有内壁， 所述导向套 16具有外壁； 所述储屑结构 120包括 实施例 1中的第一储屑槽 121、 以及实施例 2中的第二储肩槽 123。 所述安装腔 14的内壁上的第一储肩槽 121与所述导向套 16外壁上的第二储屑槽 123沿所述轴线 103方向互相错位设置。
[0090] 如图 17、 图 18以及图 19所示， 在一实施例方式中， 所述阀针组件 20包括安装于所述导向套 16 内的阀针套 21、 以及安装于所述阀针套 21内的阀针 22, 所述阀针 22具有轴线， 所述阀针 22的轴线与所 述阀体 10的轴线 103重合设置。所述阀针 22的一端与所述螺杆组件 30连接，另一端与所述阀口 11配合, 所述螺杆组件 30带动所述阀针 22运动以控制所述阀口 11的开启或者关闭，从而实现所述电子膨胀阀 100 的开启 /关闭。
[0091 ] 所述阀针组件 20还包括第一弹簧座 23、 第二弹簧座 24、 弹性件 25以及导向座 26, 所述第一弹 黃座 23、第二弹簧座 24以及所述弹性件 25收容在所述阀针套 21内， 所述第一弹簧座 23与所述螺杆组件 30连接， 并抵靠在导向座 26上， 所述弹性件 25的一端抵靠在所述第一弹簧座 23上， 另一端抵靠在第二 弹簧座 24上， 所述导向座 26安装于所述阀针套 21远离所述阀针 22的一端并与所述第二弹簧座 24抵靠， 所述导向座 26用以与所述螺杆组件 30配合。
[0092] 进一步地， 所述阀针组件 20还包括滚珠 27, 所述滚珠 27收容在所述阀针套 21内， 所述滚珠 27 设于所述阀针 22与所述螺杆组件 30之间， 用以减少所述阀针 22与所述螺杆组件 30之间的摩擦接触面的 面积， 从而减少所述阀针 22、 所述螺杆组件 30的磨损， 提高所述电子膨胀阀 100的可靠性与稳定性。
[0093] 优选地， 所述滚珠 27设于所述第二弹簧座 24与阀针 22之间， 所述滚珠 27与所述阀针 22或者 所述第二弹簧座 24之间通过点焊焊接， 在本实施方式中， 所述阀针 22上开设有凹槽 221， 所述滚珠 27安 装于所述凹槽 221内， 所述滚珠 27与所述阀针 22之间通过点焊焊接。在这里， 通过设置滚珠 27, 使得所 述第二弹簧座 24与所述阀针 22之间为点接触， 从而减少了所述第二弹簧座 24与所述阀针 22之间摩擦接 触面的面积， 以减少所述第二弹簧座 24与所述阀针 22之间的接触磨损， 提高所述电子膨胀阀 100的可靠 性与稳定性。
[0094] 如图 19、 图 33以及图 34所示， 所述螺杆组件 30包括螺杆 31以及螺母套 32, 所述螺杆 31具有 相对设置的第一端及第二端， 所述螺杆 31 的一端与所述转子组件 50连接， 所述螺杆 31 的第二端穿设于 所述螺母套 32, 并与第一弹簧座 23连接， 所述螺杆 31的第二端与所述螺母套 32之间螺纹连接， 所述螺 母套 32的一端安装于所述连接片 17上。
[0095] 进一步地， 所述螺母套 32具有相对设置的第一端 32a及第二端 32b， 所述螺母套的第一端 32a安 装于所述连接片 17上， 所述螺母套的第二端 32b收容在所述套管 40内。 所述螺母套的第一端 32a延伸设 有配合段 321， 所述配合段 321伸入所述安装孔 111 内， 并靠近于所述第一圆柱段 162设置。
[0096] 优选地， 所述螺母套的第一端 32b设有卡接槽 32c, 所述卡接槽 32c内设有卡接凸起， 对应地， 所述连接片 17上开设有连接孔， 所述螺母套的第一端 32b安装于所述连接孔内， 并通过所述卡接凸起实 现与所述连接片 17之间的卡接连接。 所述螺杆 31在所述转子组件 50的驱动下转动时， 由于所述螺杆 31 与所述螺母套 32之间形成的螺母丝杆配合关系， 所述螺杆 31以及与所述螺杆 31固定连接的转子组件 50 等会沿着螺杆 31的轴线方向运动， 从而实现所述螺杆 31带动所述阀针组件 20的运动。 更正页 （细则第 91条） ISA/CN [0097] 进一步地， 所述配合段 321上开设有配合孔 321 a, 所述第三圆柱段 164从所述配合孔 321 a伸入 所述螺母套 32内， 并与所述螺母套 32之间固定连接。 可以理解的是， 通过设置配合段 321， 可以延长所 述导向套 16与所述螺母套 32之间的配合长度， 提高所述导向套 16与所述螺母套 32之间连接的可靠性。
[0098] 优选地， 所述固定连接包括螺纹连接、 过盈配合等。 在本实施方式中， 所述第三圆柱段 164与所 述螺母套 32之间为过盈配合， 从而以通过所述第三圆柱段 164导正所述螺母套 32, 以使所述螺母套 32的 轴线与所述导向套 16的轴线、 所述阀体 10的轴线重合设置。
[0099] 在本实施方式中， 可以理解的是， 所述第一圆柱段 162与所述安装腔 14之间过盈配合， 所述第 三圆柱段 164与所述螺母套 32之间为过盈配合， 从而通过所述第一圆柱段 162导正所述阀体 10, 所述第 三圆柱段 164导正所述螺母套 32, 使得所述阀体 10、 所述导向套 16以及所述螺母套 32三者之间的轴线 重合， 以保证所述螺杆 31、 所述阀针 22以及所述阀口 11三者之间的同轴度， 从而在运动的过程中， 减少 所述阀针 22与所述阀体 10之间的碰撞， 进而以减少阀针 22等部件的磨损， 提高所述电子膨胀阀 100的 使用寿命。
[00100]所述螺母套 32内可以设置第二定位台阶 322, 所述第三圆柱段 164伸入所述螺母套 32内， 并抵 靠于所述第二定位台阶 322上， 进一步提高所述导向套 16安装的可靠性， 避免在流体介质的压力下使所 述导向套 16轴向窜动， 发生噪音。
[00101 ]如图 20以及图 21所示， 在另一实施方式中， 所述阀针组件 20的基本结构与上述所描述的阀针 组件 20的结构基本相同， 其不同之处在于， 所述阀针组件 20还包括轴承 211、 垫片 212及弹性件 213 , 轴承 211及垫片 212设置于螺杆组件 30靠近阀针 22的一端， 弹性件 213的一端与垫片 212接触， 另一端 与阀针 22接触； 轴承 211的一端抵持于螺杆组件 30及阀针套 21， 另一端与垫片 212接触； 垫片 212容置 于阀针套 21内并与轴承 211的外圈相接触。
[00102]所述螺杆 31上设有沿螺杆 31径向延伸的第二凸起 311，第二凸起 31 1与阀针套 21的内侧面平齐; 轴承 21 1的内圈抵持于第二凸起 311 , 阀针套 21的内侧面对轴承 211外圈的抵持， 实现螺杆 31及阀针套 21对轴承 211的限位。
[00103]螺杆 31与轴承 211的内圈固定连接。 本实施方式中， 螺杆 31与轴承 211的内圈通过过盈配合相 互固定， 也即螺杆 31的尺寸大于轴承 21 1内圈的孔径， 此时螺杆 31与轴承 21 1之间具有相对较佳的连接 稳定性。
[00104]可以理解， 在其他的实施方式中， 螺杆 31与轴承 211 的内圈之间还可以通过铆接、 胶固等其他 的连接方式相互固定。
[00105]螺杆 31在转子组件 50的驱动下转动， 由于螺杆 31与轴承 21 1内圈之间的固定连接， 螺杆 31带 动轴承 211的内圈转动。轴承 211内的滚动体与轴承 211的外圈滚动接触， 从而释放由螺杆 31转动。轴承 211内具有多个滚动体， 因此螺杆 31转动的释放由传统电子膨胀阀 100中的单点滚动接触， 改为本实施方 式中的多点滚动接触。 因此接触力由多个滚动体分担承受， 降低了每个接触点上的接触压力， 滚动摩擦减 小摩擦力。
[00106]此外， 由于轴承 211与螺杆 31的同轴安装， 滚动体上的接触力垂直于螺杆 31的重力方向， 这也 相对降低了传统电子膨胀阀中接触点上的接触力， 提高了电子膨胀阀 100的稳定性与可靠性。 同时， 轴承 211具有游隙， 从而阀针 22具有一定的自由度， 可以减小因阀针 22、 阀口 11之间的同轴度误差。
[00107]本实施方式中， 弹性件 213为弹簧， 此时弹性件 213具有相对较高的连接稳定性。 可以理解， 在 其他的实施方式中， 弹性件 213还可以为弹性柱等其他类型的弹性元件。
[00108]请继续参阅图 4以及图 17, 所述转子组件 50包括位于所述套管 40内的转子 51、 及用以安装所 述螺杆 31的转接板 52、用以限制所述转子 51转动角度的限位件 53以及安装于所述转接板 52上的导动片 更正页 （细则第 91条） ISA/CN 54, 所述转子 51安装于所述转接板 52上， 所述转接板 52与所述螺杆 31之间通过焊接等方式固定连接。
[00109]所述限位件 53包括套设在所述螺母套上的弹簧 531 , 以及安装于所述导动片 54上的止挡圈 532, 所述弹簧 531的一端与所述连接片 17连接， 所述弹簧 531的另一端设有止挡部 531 a, 所述止挡圈 532缠 绕在所述弹簧 531上。 优选地， 所述螺母套 32外壁上设有止挡台 323 , 所述止挡台 323用以所述止挡圈 532配合， 以限制所述转子 51转动角度。
[001 10]在一实施方式中， 在所述转子 51转动地沿所述轴线 103运动， 以驱动所述螺杆 31带动所述阀针 22关闭所述阀口 11的过程中， 所述止挡圈 532沿着所述弹簧 531运动； 所述止挡圈 532抵靠于所述止挡 台 323 ,限制所述转子 51转动角度，为所述转子 51的下限位。在所述转子 51转动地沿所述轴线 103运动， 以驱动所述螺杆 31带动所述阀针 22打开所述阀口 11的过程中， 所述止挡圈 532沿着所述弹簧 531运动； 所述止挡圈 532抵靠于止挡部 531a, 以限制所述转子 51转动角度， 为所述转子 51的上限位。
[001 1 1 ]进一步地， 螺杆 31的外侧面沿螺杆 31的径向向外延伸并形成凸台 311， 螺杆 31上的凸台 311抵 持于导向套 26, 从而确定电子膨胀阀 100中转子 51以及螺杆 31的运动下限位。
[001 12] 由于电子膨胀阀 100的下限位由螺杆 31与导向套 26之间的相互抵持决定， 螺杆 31作为长直杆 件， 机械碰撞产生的冲击力方向与螺杆 31 的轴向一致， 不仅产生的振动与噪音相对较低， 而且冲击力产 生的振动与噪音可以较快在长直的杆体上快速消耗， 因此电子膨胀阀 100由于下限位的限制切换转子组件 50运动状态而产生的噪音相对降低。
[001 13]在一实施方式中， 电子膨胀阀 100的上限位由止挡圈 532与弹簧 531的止挡部 531a之间的相互 抵持实现。 在转子 51转动地沿轴线 103运动， 以驱动螺杆 31带动阀针 22关闭阀口 11的过程中， 止挡圈 532沿着弹簧 531运动。 止挡圈 532抵靠于止挡部 531 a， 以限制转子 51转动角度， 为转子 51及螺杆 31 的上限位。
[001 14]在另一实施方式中， 为了进一步降低电子膨胀阀 100中转子组件 50切换运动状态时产生的噪音， 电子膨胀阀 100的上限位由螺杆 31远离阀针组件 20的一端与套管 40的相互抵持决定。通过调整弹簧 531 的止挡部 531a与止挡圈 532的尺寸， 使得套管 40抵持螺杆 31时， 止挡圈 532还未与弹簧 531的止挡部 531 a相接触， 从而将螺杆 31与套管 40的相互抵持设置为电子膨胀阀 100的上限位。
[001 15]此时， 电子膨胀阀 100的上限位依然由螺杆 31决定， 螺杆 31作为长直杆件， 机械碰撞产生的冲 击力方向与螺杆 31 的轴向一致， 不仅产生的振动与噪音相对较低， 而且冲击力产生的振动与噪音可以较 快在长直的杆体上快速消耗， 因此电子膨胀阀 100由于上限位的限制切换转子组件 50运动状态而产生的 噪音相对降低。
[001 16]进一步的， 螺杆 31临近套管 40的一端设置为曲面， 以匹配套管 40内侧面的形状， 此时螺杆 31 与套管 40之间具有相对较佳的连接性能。
[001 17]在又一实施方式中， 电子膨胀阀 100的上限位还可以由导向座 26与螺母套 32的相互抵持实现， 螺母套 32抵持导向座 26， 由于导向座 26与螺杆 31固定连接， 螺母套 32对导向座 26的抵持能够实现对 螺杆 31进一步远离阀口 11的限制。 此时通过设置螺杆 31的长度， 使得螺母套 32与导向座 26相互抵持 时， 螺杆 31还未与套管 40接触， 从而确保电子膨胀阀 100的上限位由螺母套 32与导向座 26之间的抵持 决定。
[001 18]螺母套 32作为体积较大的回转件， 机械碰撞产生的冲击力所带来的噪声相对较少， 而且螺母套 32上产生的振动及因振动所带来的噪声也可以快速消耗，因此降低了电子膨胀阀 100由于上限位的限制切 换转子组件 50运动状态而产生的噪音相对降低。
[001 19]可以理解， 当电子膨胀阀 100的上限位并不由止挡圈 532与弹簧 531的止挡部 531a之间的相互 抵持实现， 也即电子膨胀阀 100采用上述的实施方式时， 止挡圈 532与弹簧 531也可以省略。 省略止挡圈 更正页 （细则第 91条） ISA/CN 532、 导动片 54以及弹簧 531后的电子膨胀阀 100的结构如图 18、 图 19所示。
[00120]可以理解， 转子组件 50与螺杆组件 30是随同运动， 转子组件 50的运动上限位及下限位， 即是 螺杆组件 30的运动上限位及下限位， 本说明书不加以区分。
[00121]需要解释的是， 本说明书中所指的下限位是指螺杆 31朝向阀口 11运动的最大工作位置， 命名该 工作位置为下限位； 本说明书中所指的上限位是指螺杆 31远离阀口 11运动的最大工作位置， 命名该工作 位置为上限位。 上限位与下限位中的“上”与“下”， 并不具有方位概念， 只是为描述方便所命名。
[00122]所述定子组件 （图未示） 包括线圈等部件， 用以通电后产生磁场， 并在该磁场力的作用下， 带动 所述转子 51转动， 从而实现所述螺杆 31的转动。
[00123]在本实施方式中， 所述电子膨胀阀 100为电动式电子膨胀阀， 所述转子 51为步进电机中由永磁 铁制成的电机转子， 所述定子组件为步进电机中的电机定子， 步进电机收到控制电路提供的逻辑数字信号 后将信号传递至电机定子的各相线圈中， 永久磁铁制成的电机转子受磁力矩作用产生旋转运动， 从而实现 定子组件驱动转子组件转动的运动过程。
[00124]本申请中的电子膨胀阀 100采用了一体式的阀座， 利用一体式的阀座集成传统电子膨胀阀的阀芯 座与套管座， 因此减少了电子膨胀阀 100在轴向上的装配次数， 即降低了因为多次装配而降低电子膨胀阀 100各个零部件同轴度的可能性， 提高所述电子膨胀阀 100各个零部件之间的同轴度提高， 而且由于零部 件数量减少， 电子膨胀阀 100的开阀性能能够得到保证， 安装更为便捷，整个产品的可靠性与稳定性提高。
[00125]进一步地， 如图 7所示， 所述阀口 11与阀体 10同轴设置， 命名开设有阀口 11的一端为阀体 10 的第一端 104， 阀体 10上与第一端 104相对的另一端命名为第二端 105， 阀口 11沿第二端 105指向第一 端 104的方向进刀开设。 由于采用上端进刀的加工方式， 阀体 10的阀口在加工时仅需要进行一次装夹， 这减少了阀体 10的阀口 11在制造过程中的装夹次数， 即减少了阀体 10的阀口 11在加工中的定位误差， 提高了阀口 11与阀体 10的同轴度。
[00126]并且， 由于直接在阀体 10上开设阀口 11， 与传统的电子膨胀阀相比减少了开设阀口的阀座芯与 阀体之间的焊接固定， 焊接数量的减少提高了阀体 10的整体性， 电子膨胀阀 100的可靠性与稳定性提高。
[00127] 阀口 11临近阀体 10第二端 105的一端设置有第一倒角 106， 由于第一倒角 106的开设， 阀口 11 临近阀体 10第二端 105的部分形成敞口结构， 能够提高阀针 22在阀口 11 内的密封性能， 减少了电子膨 胀阀 100的内漏并且提高了电子膨胀阀 100对流体流量控制的精度。
[00128] 阀口 11远离阀体 10第二端 105的一端设置有第二倒角 107, 由于第一倒角 106及第二倒角 107 的开设， 清除了阀口 11加工过程中带出的毛刺， 使得流体介质通过阀口 11时具有更加流程的流通特性。
[00129]优选地， 第一倒角 106与第二倒角 107均小于 0.1mm。
[00130]此外， 为了进一步隔绝噪音， 阀体 10与导向套 16相接触的壁厚尺寸为阀体 10半径尺寸的 30% 至 80%。 阀体 10与导向套 16相接触的壁厚尺寸设置为阀体 10半径尺寸的 30%至 80%, 能够较好的隔绝 噪音， 将流体介质的流通噪音封存于阀体 10的内部。 阀体 10的壁厚过小， 对噪音的封存效果相对较差； 阀体 10的壁厚过大， 不利于阀针组件 20等部件在阀体 10内的固定安装。
[00131]优选地， 阀体 10与导向套 16相接触的壁厚尺寸为阀体 10半径尺寸的 80%。
[00132]如图 22所示， 为了降低所述电子膨胀阀 100在使用过程中产生的噪音， 降低流体介质通过所述 阀口 11时因流动不稳定性而造成的湍流噪音，在所述介质出管 102与所述阀体 10之间设置有降噪模块 60, 所述降噪模块 60用以提高流体介质流经阀口 11时的稳定性， 从而降低电子膨胀阀 100使用过程中的湍流 噪声。
[00133]如图 23所示，阀体 10上开设有与阀口 11相连通的容置腔 10f，容置腔 10f用以容置降噪模块 60。 降噪模块 60的一端沿垂直于阀体 10中心轴线的方向向外延伸并形成第三凸起 61，介质出管 102套设降噪 更正页 （细则第 91条） ISA/CN 模块 60的部分并且抵持于第三凸起 61。 降噪模块 60的一端与阀体 10接触， 另一端受介质出管 102的抵 持， 介质出管 102与阀体 10之间的焊接固定使得降噪模块 60夹设并且固定于阀体 10与介质出管 102之 间。
[00134]可以理解， 在其他的实施方式中， 降噪模块 60还可以采用其他的结构固定于阀体 10与介质出管 102之间， 例如介质出管 102也可以直接抵持降噪模块 60远离阀口 11的另一端， 此时降噪模块 60上形成 的第三凸起 61也可以省略。
[00135]降噪模块 60上开设有降噪孔 62, 降噪孔 62与阀口 11止口对接， 降噪孔 62连通阀口 11的孔径 与阀口 11 的孔径匹配， 使得流体介质通过阀口 11进入降噪孔 62时能够平滑流入， 避免流体介质在通过 阀口 11进入降噪孔 62时产生紊流。
[00136]本实施方式中， 降噪孔 62与阀口 11同轴设置。
[00137]请一并参阅图 24, 在一实施方式中， 降噪孔 62为台阶孔， 降噪孔 62沿远离阀口 11的方向逐渐 扩展。
[00138]在本实施方式中， 降噪孔 62为三段式台阶孔， 降噪孔 62包括第一孔 621、 第二孔 622以及第三 孔 623 ,第一孔 621与阀口 11对接，第一孔 621、第二孔 622以及第三孔 623沿轴向相互贯通， 第二孔 622 位于第一孔 621与第三孔 623之间， 第三孔 623的孔径大于第二孔 622的孔径， 第二孔 622的孔径大于第 一孔 621的孔径。
[00139]本实施方式中， 为了进一步减少流体流通时产生的紊流， 降低电子膨胀阀 100在使用过程中的噪 声， 第一孔 621、 第二孔 622以及第三孔 623为具有对称性的圆孔并且同轴设置。
[00140]当然， 若不考虑流体通过台阶孔时因结构不对称而可能产生的紊流， 第一孔 621、 第二孔 622以 及第三孔 623的各个中心轴之间也可以形成间距， 第一孔 621、 第二孔 622以及第三孔 623也可以采用异 型孔的形状。
[00141 ]可以理解， 在其他的实施方式中， 降噪孔 62还可以采用两段、 四段以及四段以上的结构形式， 只要降噪孔 62能够形成沿远离阀口 11方向逐渐扩展的台阶孔即可。
[00142]下面阐释本实施方式中降噪模块 60降低流体介质流通噪声的原理：
[00143]降噪孔 62为台阶孔， 流体介质通过阀口 11进入降噪孔 62时的流通有效截面以台阶状逐渐扩大， 流体介质进入降噪孔 62后的流速降低， 流体介质通过逐渐扩张的降噪孔抑制了自由剪切面的产生， 也就 提高了流体介质的稳定性， 使得流体介质较少地产生湍流噪音， 从而降低电子膨胀阀 100在使用过程中的 噪音。
[00144]请一并参阅图 25 , 在另一实施方式中， 所述降噪孔 62为喇叭孔， 降噪孔 62包括与阀口 1 1相连 通的圆柱孔 621a以及与圆柱孔 621a相连通的锥形孔 622a, 锥形孔 622a连接于圆柱孔 621a的一端向远离 阀口 11的方向逐渐扩展。 圆柱孔 621a的孔径尺寸与阀口 11的孔径尺寸匹配。
[00145]可以理解， 锥形孔 622a也可以直接与阀口 11对接， 也即； 锥形孔 622a朝向阀口 11一端的孔径 尺寸与阀口 11的孔径尺寸匹配， 此时圆柱孔 621也可以省略。
[00146] 由于圆柱孔 621a的开设， 相当于增加了阀口 11的长度， 进一步提高了流体介质的稳定性。
[00147]下面阐释本实施方式中降噪模块 60降低流体介质流通噪声的原理：
[00148]降噪孔 62为喇叭孔， 流体介质通过阀口 11进入降噪孔 62时的流通有效截面逐渐扩大， 流体介 质进入降噪孔 62后的流速降低， 流体介质通过逐渐扩张的降噪孔抑制了自由剪切面的产生， 也就提高了 流体介质的稳定性， 使得流体介质较少地产生湍流噪音， 从而降低电子膨胀阀 100在使用过程中产生的噪 音。
[00149]请一并参阅图 26, 在又一实施方式中， 降噪孔 62为直孔， 降噪孔 62贯穿降噪模块 60的两个端 更正页 （细则第 91条） ISA/CN 面并与阀口 11对接， 降噪孔 62的孔径与阀口 11的孔径匹配。
[00150]下面阐释本实施方式中降噪模块 60降低流体介质流通噪声的原理：
[00151 ]降噪孔 62为长度相对较高的直孔， 降噪孔 62相当于延长了阀口 1 1的长度， 这使得在阀口 11入 端和降噪孔 62末端流通的流体介质的速度梯度和压力梯度降低， 也就提高了流体介质的稳定性， 降低了 电子膨胀阀 100在使用过程中产生的噪音。
[00152]进一步的， 降噪模块 60呈模块化的固定于阀体 10内， 降噪模块与阀体 10分体设置， 这使得电 子膨胀阀 100上形状己经相对复杂的阀体 10无需开设更加难以加工的复杂形状的阀口 11， 使得电子膨胀 阀 100可以采用标准化阀体 10与定制化降噪模块的组合， 实现电子膨胀阀 100零部件进一步的标准化。
[00153]如图 27以及图 28所示， 所述介质出管 102与阀体 10相接触的一端还设置有焊环 108, 焊环 108 的两个相邻侧面分别与阀体 10及介质出管 102接触， 焊环 108用以填充阀体 10与介质出管 102之间的焊 缝 109。 当焊环 108在外部焊接设备的高温加热下熔融， 以熔融态的填充材料流入阀体 10与介质出管 102 之间形成的焊缝 109, 从而实现对阀体 10及介质出管 102的焊接固定。
[00154]进一步地， 所述电子膨胀阀 100上还设置有焊接结构 70, 所述焊接结构 70包括阀体 10临近介质 出管 102的一端上沿垂直阀体 10轴线 103方向延伸并形成的第四凸起 71，介质出管 102与第四凸起 71相 互接触，介质出管 102与第四凸起 71的接触面是阀体 10与介质出管 102之间需要填充焊接材料的焊缝 109。
[00155] 由于第四凸起 71在阀体 10上的设置， 使得焊缝 109的形成位置朝远离焊环 108及阀体 10接触 端面的方向设置， 从而使得焊环 108的中心与焊缝 109能够共面， 焊环 108的中心与焊缝 109之间的共面 平齐使得焊环 108在焊接时能够顺利的流入焊缝 109内， 避免了爬焊、 脱焊现象的发生。
[00156]焊接结构 70还包括设置于介质出管 102上的凸边 72,介质出管 102沿阀体 10的轴线 103方向伸 出第四凸起 71并形成凸边 72, 也即介质出管 102的厚度大于第四凸起 71的径向延伸长度， 焊环 108在焊 接时能够以熔融态的形式沿着凸边 72进入焊缝 109内， 进一步提高了阀体 10与介质出管 102之间的焊接 质量。
[00157]焊接结构 70还包括设置于介质出管 102与阀体 10相接触的端面上的第三倒角 73 , 第三倒角 73 连接凸边 72以及介质出管 102的外侧面， 焊环 108通过第三倒角 73与阀体 10接触。 由于第三倒角 73的 开设， 阀体 10与介质出管 102之间形成用以容置焊环 108的容置空间 74, 该容置空间具有敞口结构， 使 得焊环 108更容易固定于阀体 10及介质出管 102上， 焊环 108在焊接时也能够更加容易地进入焊缝 109 内。
[00158]所述电子膨胀阀 100通过在阀体 10及介质出管 102上设置焊接结构 70, 使得焊环 108的中心与 焊缝 109平齐， 焊环 108在焊接时能够以熔融态顺利地流入焊缝 109内， 提高了阀体 10与介质出管 102 之间的焊接成形质量， 提高了电子膨胀阀 100的可靠性与稳定性。
[00159]如图 2所示， 所述电子膨胀阀 100还包括压力平衡通道 80, 所述压力平衡通道 80用以使所述进 口 10a处的介质压力与所述电子膨胀阀 100 内部压力平衡， 这样不仅能够避免流体介质对所述导向套 16 的冲击， 减少噪音； 同时， 在所述进口 10a处的介质压力发生变化时， 通过所述压力平衡通道 80能够使 所述电子膨胀阀 100内部的压力与所述进口处的压力快速平衡， 避免所述电子膨胀阀 100内部出现额外负 载的现象， 提高所述电子膨胀阀 100运行的稳定性。
[00160]在一实施方式中， 所述压力平衡通道 80设于所述导向套 16与所述阀体 10之间， 所述压力平衡 通道 80用以将所述导向套 16内部与所述阀体 10之间互相连通， 以使所进口 10a处的流体介质压力与所 述导向套 16内部之间的流体介质压力平衡。
[00161]进一步地， 如图 12所示， 压力平衡通道 80开设有于所述导向套 16上， 所述压力平衡通道 80将 所述阀腔 12与所述导向孔 16a之间连通， 以平衡所述阔腔 12与所述导向孔 16a之间压力， 从而， 当所述 更正页 （细则第 91条） ISA/CN 阀口 11打开时， 流体介质进入所述阀腔 12, 同时部分的流体介质经过所述压力平衡通道 80进入所述导向 孔 16a内， 以将所述导向孔 16a与所述阀腔 11之间的压力平衡，这样不仅能够避免流体介质对所述导向套 16的冲击， 减少噪音； 同时， 在系统压力变化时， 所述电子膨胀阀 100的内部压力能快速平衡， 避免因压 差产生额外负载， 提高所述电子膨胀阀 100运行的稳定性。
[00162]在本实施方式中， 通过压力平衡通道 80平衡所述阀腔 12与所述导向孔 16a之间的压力； 即， 平 衡所述阀腔 12与所述电子膨胀阀 100内部除阀腔 12的其他部分的压力， 以使所述电子膨胀阀 100的内部 整体处于压力平衡的状态， 避免在所述电子膨胀阀 100内部出现额外负载的现象。
[00163]优选地，所述压力平衡通道 80包括至少一个压力平衡孔 80a;所述压力平衡孔 80a将所述阔腔 12 与所述导向孔 16a之间互相连通。 从而使部分流体介质经过所述压力平衡孔 80a进入所述导向孔 16a内， 以达到平衡压力的目的。
[00164]所述压力平衡孔 80a具有轴线，所述压力平衡孔 80a的轴线与所述轴线 X平行设置。即可以理解， 所述压力平衡孔 80a竖直地开设于所述导向套 16上，从而该压力平衡孔 80a不会影响流体介质流动的方向， 消除了因流体介质流向发生改变造成的噪音。
[00165]进一步地， 所述压力平衡孔 80a的数量为 2个， 2个所述压力平衡孔 80a沿所述轴线 X的周向均 勾分布在所述导向套 16上。 当然， 在本实施方式中， 所述压力平衡孔 80a的数量还可以为 3、 4等， 所述 压力平衡孔 80a的具体数量可以根据实际的需求而设置。
[00166]优选地， 每个所述压力平衡孔 80a为圆形的压力平衡孔。 当然， 在其他实施方式中， 所述压力平 衡孔 80a还可以呈其他形状。 例如， 所述压力平衡孔 80a为矩形、 多边形的压力平衡孔。
[00167]在另一实施方式中， 如图 4、 图 30至图 34所示， 所述压力平衡通道 80设于所述安装座 110、 导 向套 16以及所述螺母套 32之间， 用以将所述进口 10a与所述导向套 16内部、 所述安装座 110内部、 所 述螺母套 32内部以及所述套管 40内部之间互相连通， 以使所进口 10a处的流体介质压力与所述导向套 16 内部、 所述安装座 110内部、 所述螺母套 32内部以及所述套管 40内部之间的流体介质压力平衡。
[00168]所述压力平衡通道 80包括第一平衡通道 81以及第二平衡通道 82, 所述第一平衡通道 81用以将 所述进口 10a与所述导向套 16内部、 所述螺杆组件 30内部以及所述套管 40内部之间互相连通； 所述第 二平衡通道 82用以将所述安装座 110内部与所述第一平衡通道 81连通设置，从而通过所述第一平衡通道 81以及第二平衡通道 82将所述导向套 16内部、 所述安装座 110内部、 所述螺母套 32内部以及所述套管 40内部与所述进口之间互相连通。 当流体介质从所述进口 10a进入时， 部分的流体介质经过所述第一平衡 通道 81进入所述导向套 16内部、所述螺杆组件 30内部以及所述套管 40内部， 经过所述第二平衡通道 82 进入所述安装座 110内部， 以使得所述电子膨胀阀 100内部各处的介质压力相等。
[00169]所述第一平衡通道 81包括第一平衡孔 81 1以及第二平衡孔 812,所述第一平衡孔 811开设于所述 导向套 16上， 用以将所述导向套内部与所述阀腔 12之间连通， 所述第二平衡孔 812开设于所述螺母套 32 上， 用以将所述套管 40内部与所述螺母套 32内部连通， 从而实现所述阀腔 12与导向套 16内部、 螺母套 32内部以及套管 40内部之间互相连通， 达到平衡压力的目的。
[00170]进一步地，所述第一平衡孔 811具有轴线，所述第一平衡孔 811的轴线与所述轴线 103平行设置。 即可以理解， 所述第一平衡孔 811竖直地开设于所述导向套 16上， 从而该第一平衡孔 811不会影响流体 介质流动的方向， 消除了因流体介质流向发生改变造成的噪音。
[00171]优选地， 所述第一平衡孔 811的数量为 2个， 2个所述第一平衡孔 811沿所述轴线 103的周向均 勾分布在所述导向套 16上。 当然， 在本实施方式中， 所述第一平衡孔 811的数量还可以为 3、 4等， 所述 第一平衡孔 811的具体数量可以根据实际的需求而设置。
[00172]每个所述第一平衡孔 811为圆形的压力平衡孔。 在其他实施方式中， 所述第一平衡孔 811还可以 更正页 （细则第 91条） ISA/CN 呈其他形状。 例如矩形、 多边形的压力平衡孔。
［00173］所述第二平衡孔 812具有轴线， 所述第二平衡孔 812的轴线与所述第一平衡孔 811的轴线垂直设 置。 当然， 在其他实施方式中， 所述第二平衡孔 812的轴线也可以不与所述第一平衡孔 811的轴线垂直。 ［00174］所述第二平衡通道 82包括所述第三平衡孔 821，所述第三平衡孔 821开设有于所述连接片 17上， 所述第三平衡孔 821用以将所述安装座 110内部与所述套体 40的内部连通， 同时， 所述第三平衡孔 821 还兼作为安装所述弹簧 531。 所述弹簧 531的一端伸入所述第三平衡孔 821 内。 可以理解的是， 通过所述 第三平衡孔 821使得所述安装座 110内部与所述第一平衡通道 8］连通， 所述进口 10a处的流体介质经所 述第一平衡通道 81、 第三平衡孔 821进入所述安装座 110的内部。
［00175］优选地，所述第三平衡孔 82］为槽孔，所述第三平衡孔 821沿垂直于所述阀体轴线方向开口设置。 所述第三平衡孔 821的数量为多个。 在本实施方式中， 所述第三平衡孔 821的数量 2个， 2个所述第三平 衡孔 821关于所述阀体轴线对称设置。
［00176］如图 2及图 3所示， 进一步地， 所述第二平衡通道 82还可以包括第四平衡孔 822以及第五平衡 孔 823 , 所述第四平衡孔 822开设于所述导向套 16, 第五平衡孔 823开设于螺母套 32上， 所述第四平衡 孔 822与所述第五平衡孔 823连通， 从而通过所述第四平衡孔 822、 所述第五平衡孔 823将所述导向套 16 内部与所述安装座 110内部连通。 在这里， 通过进一步设置第四平衡孔 822以及第五平衡孔 823 , 可提高 所述安装座 110内部与所述进口 10a之间的介质压力平衡的速度。
［00177］进一步地， 所述第四平衡孔 822开设于所述第二圆柱段 163上， 所述第五平衡孔 823开设于所述 配合段 321上， 通过所述第四平衡孔 822以及所述第五平衡孔 822实现所述安装孔 11 1与所述导向孔 16a 之间的连通， 从而进一步实现所述安装座 110内部与所述第一平衡通道 81之间的连通。
［00178］所述第四平衡孔 822具有轴线， 所述第五平衡孔 822具有轴线， 所述第四平衡孔 822的轴线与所 述第五平衡孔 822的轴线重合设置， 所述第四平衡孔 822的轴线与所述第一平衡孔 811的轴线垂直设置。 当然， 在其他实施方式中， 所述第四平衡孔 822的轴线与所述第五平衡孔 822的轴线也可以不重合设置， 只要能实现所述第四平衡孔 822与所述第五平衡孔 822之间的连通即可， 所述第四平衡孔 822的轴线与所 述第一平衡孔 811的轴线也可以不垂直。
［00179］ 以上所述实施例的各技术特征可以进行任意的组合， 为使描述简洁， 未对上述实施方式中的各个 技术特征所有可能的组合都进行描述， 然而， 只要这些技术特征的组合不存在矛盾， 都应当认为是本说明 书记载的范围。
［00180］ 以上所述实施例仅表达了本发明的几种实施方式， 其描述较为具体和详细， 但并不能因此而理解 为对发明专利范围的限制。 应当指出的是， 对于本领域的普通技术人员来说， 在不脱离本发明构思的前提 下， 还可以做出若干变形和改进， 这些都属于本发明的保护范围。 因此， 本发明专利的保护范围应以所附 权利要求为准。
更正页 （细则第 91条） ISA/CN

Claims

权 利 要 求 书
1、 一种电子膨胀阀， 其特征在于， 包括阀体、 阀针组件、 螺杆组件、 转子组件、 定子组件及套管， 所述阀体的内部设置有用以导向所述阀针组件运动的导向套， 所述阀针组件设置于所述导向套上， 所述螺 杆组件连接于所述转子组件， 所述定子组件作用于所述转子组件并能够驱动所述转子组件转动， 所述转子 组件的转动能够带动所述螺杆组件运动， 所述阀体上开设有阀口， 所述阀针组件在所述螺杆组件的带动下 封闭或开启所述阀口， 所述套管套设于所述阀体远离所述阀口的一端。
2、 根据权利要求 1 所述的电子膨胀阀， 其特征在于， 所述阀体上连接有介质出管， 流体介质通过所 述阀口后流入所述介质出管并通过所述介质出管向外排出， 所述介质出管与所述阀体之间设有降噪模块， 所述降噪模块上开设有降噪孔， 所述降噪孔与所述阀口对接， 所述降噪孔与所述阀口对接一端的孔径与所 述阀口的孔径匹配。
3、 根据权利要求 2所述的电子膨胀阀， 其特征在于， 所述降噪孔为多段台阶孔， 所述台阶孔沿远离 所述阀口的方向逐渐扩展； 或者，所述降噪孔包括锥形孔，所述锥形孔朝向远离所述阀口的方向逐渐扩展; 或者， 所述降噪孔为直孔， 所述直孔贯穿所述降噪模块的两个端面。
4、 根据权利要求 1 所述的电子膨胀阀， 其特征在于， 所述阀体上设有焊环以及第一凸起， 所述焊环 与所述介质出管相接触， 所述第一凸起位于所述阀体靠近介质出管的一端， 所述第一凸起与所述介质出管 之间形成焊缝， 所述焊环的中心与所述焊缝平齐。
5、 根据权利要求 1 所述的电子膨胀阀， 其特征在于， 所述阀针组件包括阀针、 弹性件、 轴承以及垫片， 所述阀针的一端抵持于所述弹性件， 另一端用以与所述 阀口配合， 所述轴承具有外圈及内圈， 所述轴承的内圈与所述螺杆固定连接， 所述垫片的一端抵持于所述 轴承的外圈， 另一端抵持于所述弹性件。
6、 根据权利要求 1 所述的电子膨胀阀， 所述阀体上开设有所述阀口的一端命名为第一端， 所述阀体 上与所述第一端相对的一端命名为第二端， 所述阀口沿所述第二端指向所述第一端的方向进刀开设。
7、 根据权利要求 6所述的电子膨胀阀， 所述阀口上靠近所述第二端的端面设有第一倒角， 所述阀口 远离所述第二端的端面设有第二倒角。
8、 根据权利要求 6所述的电子膨胀阀， 所述阀体与所述导向套相接触的壁厚尺寸为所述阀体半径的 30%至 80%。
9、 根据权利要求 1 所述的电子膨胀阀， 所述电子膨胀阀还包括压力平衡通道， 所述阀体上开设有供 流体介质流入的进口， 所述压力平衡通道将所述进口与所述电子膨胀阀的内部连通， 以使所述进口处的流 体介质压力与所述电子膨胀阀的内部的流体介质压力平衡。
10、 根据权利要求 9所述的电子膨胀阀， 所述阀体上设有安装座， 所述安装座安装于所述阀体上， 所 述套管安装于所述安装座上， 所述压力平衡通道用以将所述进口与所述导向套内部、 所述安装座内部、 所 述螺杆组件内部以及所述套管内部之间互相连通， 以使所述进口处的流体介质压力与所述导向套内部、 所 述安装座内部、 所述螺杆组件内部以及所述套管内部之间的流体介质压力平衡。
11、 根据权利要求 10所述的电子膨胀阀， 其特征在于， 所述压力平衡通道包括第一平衡通道以及第 二平衡通道， 所述第一平衡通道用以将所述进口与所述导向套内部、 所述螺杆组件内部以及所述套管内部 之间互相连通； 所述第二平衡通道用以将所述安装座内部与所述第一平衡通道连通。
12、 根据权利要求 1所述的电子膨胀阀， 所述阀体上还开设有与所述阀口连通的安装腔， 所述导向套 安装于所述安装腔内并与所述安装腔之间过盈配合， 所述阀体与所述导向套之间设有储屑结构， 所述储屑 结构用以储存所述阀体与所述导向套之间的碎屑。
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