WO2023143202A1 - Détendeur électronique - Google Patents

Détendeur électronique Download PDF

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Publication number
WO2023143202A1
WO2023143202A1 PCT/CN2023/072428 CN2023072428W WO2023143202A1 WO 2023143202 A1 WO2023143202 A1 WO 2023143202A1 CN 2023072428 W CN2023072428 W CN 2023072428W WO 2023143202 A1 WO2023143202 A1 WO 2023143202A1
Authority
WO
WIPO (PCT)
Prior art keywords
small
valve
electronic expansion
valve needle
sealing
Prior art date
Application number
PCT/CN2023/072428
Other languages
English (en)
Chinese (zh)
Inventor
金钜
王傅钢
沙海建
李凯龙
Original Assignee
浙江盾安人工环境股份有限公司
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 CN202210114497.4A external-priority patent/CN116557550A/zh
Priority claimed from CN202220250089.7U external-priority patent/CN216742911U/zh
Priority claimed from CN202220249819.1U external-priority patent/CN219035576U/zh
Priority claimed from CN202220250087.8U external-priority patent/CN217401728U/zh
Priority claimed from CN202220250108.6U external-priority patent/CN216742912U/zh
Application filed by 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Publication of WO2023143202A1 publication Critical patent/WO2023143202A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • 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

Definitions

  • the present application relates to the technical field of electronic expansion valves, in particular, to an electronic expansion valve.
  • the electronic expansion valve is usually composed of a valve seat part, a valve needle part and a large gasket.
  • the large gasket has a large valve port
  • the valve needle part has a small valve port. Through the movement of the valve needle part, the large valve port can be opened or closed or adjusted. The opening of the small valve port realizes flow control.
  • the electronic expansion valve in the prior art adopts hard seals for both the large valve port and the small valve port, which will lead to poor sealing effect, easy leakage, and difficult to ensure accurate control of the flow rate.
  • the present application provides an electronic expansion valve to solve the problem of poor sealing effect of the electronic expansion valve in the prior art.
  • an electronic expansion valve including: a valve seat part; a large sealing gasket, which is arranged in the cavity of the valve seat part, the large sealing gasket has a large valve port, and the large sealing gasket is made of soft material
  • the valve needle part is arranged in the cavity of the valve seat part, the valve needle part includes a small valve needle, a large valve needle part and a small sealing gasket, the small sealing gasket is arranged in the large valve needle part, and the small sealing gasket has a small valve port,
  • the small sealing gasket is made of soft material; wherein, the large valve needle part is used to cooperate with the large sealing gasket to open and close the large valve port, and the small valve needle is used to cooperate with the small sealing gasket to adjust the opening of the small valve port.
  • the small valve port has a tapered structure, and the end of the small valve port with a small opening faces the large valve port.
  • the end face of the large valve port is a sealing plane, and when one end of the large valve needle portion abuts against the sealing plane, the large valve port is closed.
  • the material of the small sealing pad is plastic or rubber
  • the material of the large sealing pad is plastic or rubber
  • the large valve needle part has a guide hole, the guide hole is located on the side of the small valve port away from the large valve port, and the small valve needle can axially move through the guide hole;
  • the valve needle part also includes a first inner sealing ring, the second An inner sealing ring is located between the outer wall of the small valve needle and the inner wall of the guide hole.
  • the large valve needle part is arranged axially movable in the cavity of the valve seat part, and the valve needle part further includes a second inner sealing ring, and the second inner sealing ring is arranged on the inner wall of the valve seat part and between the large valve needle part. between the outer walls.
  • valve needle part also includes a drive assembly
  • the drive assembly includes a screw and a connecting sleeve, one end of the connecting sleeve is connected to the small valve needle, the screw rod and the connecting sleeve are axially limited, and the screw is axially movable to drive The small valve needle moves.
  • the driving assembly also includes a rolling structure arranged in the connecting sleeve, and the connecting sleeve and the screw rod cooperate with the rolling structure respectively so that the connecting sleeve does not rotate with the screw rod.
  • the rolling structure is a bearing.
  • the drive assembly also includes a bush and an elastic member arranged in the connecting sleeve, and the bearing is sleeved on one end of the screw rod.
  • One side of the bearing and the connecting sleeve are axially limited in fit, and the other side of the bearing, the bushing, the elastic member and the small valve needle are sequentially abutted against.
  • valve needle part has a first stop surface and a second stop surface opposite to each other, and the first stop surface and the second stop surface limit the movement range of the small valve needle; the screw can drive the small valve needle within a preset stroke.
  • the valve needle moves independently, and the screw can drive the large valve needle to move through the small valve needle.
  • the electronic expansion valve further includes a reinforced sealing ring, and the reinforced sealing ring is arranged between the large sealing gasket and the inner wall of the valve seat component.
  • the electronic expansion valve further includes a large stop structure disposed in the cavity of the valve seat component, and the large stop structure abuts against the side of the large valve needle facing the large valve needle to compress the large seal.
  • the electronic expansion valve further includes a small limiting structure arranged in the large valve needle, and the small limiting structure abuts against a side of the small sealing gasket away from the small valve needle.
  • the large valve needle part has a limiting groove
  • the opening of the limiting groove faces the small limiting structure
  • the thickness of the small sealing gasket is greater than the depth of the limiting groove
  • the small limiting structure and the small sealing gasket protrude out of the limiting groove. Butt on one side.
  • an electronic expansion valve including: a valve seat part; a large sealing gasket arranged in the cavity of the valve seat part, the large sealing gasket has a large valve port, and the large sealing gasket is made of soft material
  • the valve needle part is arranged in the cavity of the valve seat part, the valve needle part includes a small valve needle, a large valve needle part and a small sealing gasket, the small sealing gasket is arranged in the large valve needle part, and the small sealing gasket has a small valve port,
  • the small sealing gasket is made of soft material; wherein, the large valve needle part is used to cooperate with the large sealing gasket to open and close the large valve port, and the small valve needle is used to cooperate with the small sealing gasket to adjust the opening of the small valve port.
  • both the large gasket and the small gasket are made of soft materials, so that both the large valve port and the small valve port are soft-sealed, and the soft-sealed sealing method can increase the effective contact area during sealing, and effectively
  • the problem of poor sealing effect of the electronic expansion valve is solved to avoid leakage.
  • a small valve needle is set to cooperate with a small gasket to adjust the opening of the small valve port, thereby realizing the adjustment of a small flow rate;
  • a large valve needle is set to cooperate with a large gasket to open or close the large valve mouth, thus achieving a large flow.
  • FIG. 1 shows a first cross-sectional view of an electronic expansion valve provided by an embodiment of the present application
  • Fig. 2 shows a sectional view of a small valve needle and a small gasket in Fig. 1;
  • Fig. 3 shows a cross-sectional view of the large valve needle part and the large sealing gasket in Fig. 1;
  • Fig. 4 shows a cross-sectional view of a valve needle component provided by an embodiment of the present application
  • Fig. 5 shows a sectional view of the large valve needle part, the first inner sealing ring, the first compression sleeve and the second compression sleeve in Fig. 4;
  • Fig. 6 shows a sectional view of the large valve needle part in Fig. 4;
  • Figure 7 shows a cross-sectional view of the second gland in Figure 4.
  • Fig. 8 shows the second cross-sectional view of the electronic expansion valve provided by the embodiment of the present application.
  • Figure 9 shows a cross-sectional view of the valve seat part in Figure 8.
  • Figure 10 shows a cross-sectional view of the seat ring in Figure 8.
  • Figure 11 shows a third cross-sectional view of the electronic expansion valve provided by the embodiment of the present application.
  • Figure 12 shows a cross-sectional view of the valve seat part, the large sealing gasket, the reinforced sealing ring and the large limit structure in Figure 11;
  • Figure 13 shows an exploded view in Figure 12
  • Fig. 14 shows the fifth cross-sectional view of the electronic expansion valve provided by the embodiment of the present application.
  • FIG. 15 shows a cross-sectional view of a partial structure of the electronic expansion valve in FIG. 14 .
  • Valve seat part 13. First flow hole; 14. Second flow hole; 15. Third annular step; 16. First accommodation groove; 17. Base;
  • valve needle part 31. Small valve needle; 71. Limiting rod; 72. Blocking rod; 32. Large valve needle part; 321. Guide hole; 322. Limiting groove; 11.
  • the first annular step; 12 second annular step; 411, sealing surface; 212, placement groove; 213, side opening; 33, small sealing gasket; 331, small valve port; 34, driving assembly; 341, screw rod; 342, connecting sleeve; 343, Rolling structure; 344, bushing; 345, elastic member; 35, first stop surface; 36, second stop surface; 37, first inner sealing ring; 38, second inner sealing ring;
  • Valve seat ring 91. Annular avoidance groove; 92. Fourth annular step; 93. Second accommodation groove; 22. Fifth annular step; 24. Operation hole; 94. First cylinder section; 95. Second cylinder Section; 96, the third barrel section; 97, connecting section; 98, guiding section;
  • valve sleeve 100, valve sleeve.
  • the embodiment of the present application provides an electronic expansion valve, including: a valve seat part 10;
  • the valve port 21 and the large sealing gasket 20 are made of soft materials;
  • the valve needle part 30 is arranged in the cavity of the valve seat part 10, and the valve needle part 30 includes a small valve needle 31, a large valve needle part 32 and a small sealing gasket 33 , the small sealing gasket 33 is arranged in the large valve needle part 32, the small sealing gasket 33 has a small valve port 331, and the small sealing gasket 33 is made of soft material; wherein, the large valve needle part 32 is used to cooperate with the large sealing gasket 20 To open and close the large valve port 21 , the small valve needle 31 is used to cooperate with the small sealing gasket 33 to adjust the opening of the small valve port 331 .
  • both the large gasket 20 and the small gasket 33 are made of soft materials, so that both the large valve port 21 and the small valve port 331 are soft-sealed, and the soft-sealed sealing method can improve the sealing efficiency.
  • the contact area effectively solves the problem of poor sealing effect of the electronic expansion valve and avoids leakage.
  • the small valve needle 31 is set to adjust the opening of the small valve port 331 in cooperation with the small sealing gasket 33, thereby realizing the adjustment of the small flow rate;
  • the large valve needle part 32 is set to cooperate with the large sealing gasket 20 to Open or close the large valve port 21, thereby realizing a large flow.
  • the soft material can be plastic or rubber, preferably PEEK material and PTFE material.
  • the electronic expansion valve can be installed on the installation base or in the valve body.
  • the small valve port 331 has a tapered structure, and the small opening end of the small valve port 331 faces the large valve port 21 .
  • the small valve port 331 is set in a tapered shape, and the end of the small valve port 331 with a large opening faces the large valve port 21, so that with the cooperation of the small valve needle 31 and the small valve port 331, the flow rate can be adjusted more accurately to meet the needs of the user. Require.
  • the end face of the large valve port 21 is a sealing plane 211 , and when one end of the large valve needle portion 32 abuts against the sealing plane, the large valve port 21 is closed.
  • the end face of the large valve port 21 is a sealing plane 211
  • one end of the large valve needle portion 32 is made to abut against the sealing plane 211, compared to the way of sealing on an inclined plane, The seal is more reliable, and this enables the largest flow area, which increases the flow rate of the electronic expansion valve.
  • the material of the small sealing pad 33 is plastic or rubber
  • the material of the large sealing pad 20 is plastic or rubber.
  • the materials of the small sealing pad 33 and the large sealing pad 20 are both set to be plastic or rubber, and the above two materials are used for good sealing performance, wear resistance and low cost.
  • the large valve needle part 32 has a guide hole 321, the guide hole 321 is located on the side of the small valve port 331 away from the large valve port 21, and the small valve needle 31 can axially move through the guide hole 321; the valve needle part 30 also The first inner sealing ring 37 is included, and the first inner sealing ring 37 is located between the outer wall of the small valve needle 31 and the inner wall of the guide hole 321 .
  • the guide hole 321 By setting the guide hole 321, the small valve needle 31 can be guided when it moves axially; the first inner sealing ring 37 is arranged between the outer wall of the small valve needle 31 and the inner wall of the guide hole 321, which can ensure the small
  • the tightness between the outer wall of the valve needle 31 and the inner wall of the guide hole 321 prevents fluid leakage.
  • the inner wall of the guide hole 321 has a sealing groove, and the first inner sealing ring 37 is disposed in the sealing groove.
  • the large valve needle part 32 is arranged axially movable in the cavity of the valve seat part 10
  • the valve needle part 30 further includes a second inner sealing ring 38
  • the second inner sealing ring 38 is arranged on the valve seat part Between the inner wall of 10 and the outer wall of the large needle part 32.
  • the second inner sealing ring 38 is arranged between the inner wall of the valve seat part 10 and the outer wall of the large valve needle part 32, which can ensure the sealing performance between the inner wall of the valve seat part 10 and the outer wall of the large valve needle part 32, and prevent Fluid leak.
  • the outer wall of the large valve needle portion 32 has a sealing groove, and the second inner sealing ring 38 is disposed in the sealing groove.
  • the valve needle part 30 also includes a drive assembly 34
  • the drive assembly 34 includes a screw rod 341 and a connecting sleeve 342, one end of the connecting sleeve 342 is connected to the small valve needle 31, and the screw rod 341 and the connecting sleeve 342 are limited in the axial direction.
  • the screw rod 341 is arranged axially movable to drive the small valve needle 31 to move.
  • the screw rod 341 and the connecting sleeve 342 are limited in the axial direction, and one end of the connecting sleeve 342 is connected to the small valve needle 31, so that when the screw rod 341 moves in the axial direction, it can drive the connecting sleeve 342 to move axially. , and then the connecting sleeve 342 drives the small valve needle 31 to move axially.
  • the driving assembly 34 further includes a rolling structure 343 disposed in the connecting sleeve 342 , and the connecting sleeve 342 and the screw rod 341 respectively cooperate with the rolling structure 343 so that the connecting sleeve 342 does not rotate with the screw rod 341 .
  • the rolling structure 343, and the connecting sleeve 342 and the screw rod 341 cooperate with the rolling structure 343 respectively, when the screw rod 341 rotates, due to the setting of the rolling structure 343, the connecting sleeve 342 is prevented from rotating with the screw rod 341, thereby avoiding the small valve
  • the rotation of the needle 31 relative to the small sealing pad 33 causes wear of the small sealing pad 33 , thus improving the life of the small sealing pad 33 .
  • the rolling structure 343 is a bearing
  • the driving assembly 34 also includes a bushing 344 and an elastic Part 345
  • the bearing is sleeved at one end of the screw rod 341
  • one side of the bearing and the connecting sleeve 342 are limited in the axial direction
  • the other side of the bearing, the bushing 344, the elastic member 345 and the small valve needle 31 are sequentially abutted.
  • One end of the small valve needle 31 is inserted into the connecting sleeve 342 and fixedly connected with the connecting sleeve 342.
  • the fixed connection method is welding, which is reliable and stable;
  • the rolling structure is set as a bearing, which has high rotation accuracy and high bearing capacity, and the bearing Covered on one end of the screw rod 341, one side of the bearing and the connecting sleeve 342 are limited in the axial direction, so that the bearing can be limited, and it can be ensured that when the screw rod 341 is rotating, the connecting sleeve 342 is also prevented from rotating.
  • the rotation of the small valve needle 31 is avoided; the other side of the bearing, the bushing 344, the elastic member 345 and the small valve needle 31 are sequentially abutted, wherein the bushing 344 is provided to prevent the elastic member 345 from directly contacting the bearing , can also play a guiding role; the elastic member 345 is provided.
  • the elastic member 345 is in a compressed state.
  • the elastic force of the elastic member 345 is released, driving the lining
  • the sleeve 344 moves to the side away from the small valve port 331, thereby realizing precise control of the opening of the small valve port 331, and further improving the control accuracy of small flow regulation.
  • the elastic member 345 can adopt a spring.
  • the valve needle part 30 has a first stop surface 35 and a second stop surface 36 opposite to each other, and the first stop surface 35 and the second stop surface 36 limit the moving range of the small valve needle 31;
  • the screw rod 341 can The small valve needle 31 is driven to move independently within the predetermined stroke, and the screw rod 341 can drive the large valve needle part 32 to move through the small valve needle 31 .
  • the first stop surface 35 when the small valve needle 31 moves to the side close to the small valve port 331, it can play a position-limiting role;
  • the second stop surface 36 when the small valve needle 31 In the process of moving to the side away from the small valve port 331 , it can function as a stop, thereby limiting the moving range of the small valve needle 31 .
  • the screw rod 341 when the screw rod 341 moves in the axial direction, it can drive the small valve needle 31 to move axially to adjust the opening of the small valve port 331, thereby realizing small flow adjustment; when the screw rod 341 drives the small valve needle 31 When moving to completely avoid the small valve port 331 , the small valve needle 31 drives the large valve needle portion 32 to move to adjust the opening of the large valve port 21 , thereby realizing a large flow rate.
  • the electronic expansion valve further includes a reinforced sealing ring 40 , and the reinforced sealing ring 40 is arranged between the large sealing gasket 20 and the inner wall of the valve seat part 10 .
  • the reinforcing sealing ring 40 By arranging the reinforcing sealing ring 40 between the large sealing gasket 20 and the inner wall of the valve seat part 10, the tightness between the large sealing gasket 20 and the inner wall of the valve seat part 10 can be ensured and fluid leakage can be prevented. After long-term use, even if the large sealing pad 20 is deformed, the sealing effect can still be guaranteed due to the provision of the reinforced sealing ring 40 .
  • the electronic expansion valve further includes a large stop structure 50 disposed in the cavity of the valve seat component 10, and the large stop structure 50 and the large sealing gasket 20 abut against the side of the large valve needle portion 32 to compress the large Gasket 20.
  • a large stop structure 50 disposed in the cavity of the valve seat component 10
  • the large stop structure 50 and the large sealing gasket 20 abut against the side of the large valve needle portion 32 to compress the large Gasket 20.
  • the end of the large sealing gasket 20 facing the large valve needle portion 32 has an annular groove, and the annular groove cooperates with the large stop structure 50; the end of the large sealing gasket 20 away from the large valve needle portion 32 has an escape groove to strengthen the sealing ring 40 It is arranged in the avoidance groove; the large sealing gasket 20 has a central hole, and the central hole forms a large valve port 21 . Since the large sealing gasket 20 is prone to deformation after long-term use, there will be leakage between the large sealing gasket 20 and the inner wall of the valve seat part 10 after assembly.
  • the reinforcing sealing ring 40 is arranged on the large sealing gasket 20 and the inner wall of the valve seat part 10, this further improves the sealing effect of the large valve port 21, effectively avoids fluid leakage, and also improves the service life of the electronic expansion valve.
  • the large limit structure 50 includes a compression ring and a connecting ring connected to each other, the compression ring and the large sealing gasket 20 abut, the connecting ring is located on the side of the compression ring away from the large sealing gasket 20, the connecting ring and the valve
  • the inner wall of the seat member 10 is welded.
  • the outer sidewall of the large stop structure 50 towards the end of the large sealing gasket 20 has chamfered or rounded corners.
  • the outer sidewall of the large stop structure 50 towards the end of the large sealing gasket 20 has chamfered or rounded corners.
  • the electronic expansion valve further includes a small limiting structure 60 disposed in the large valve needle portion 32 , and the small limiting structure 60 abuts against the side of the small sealing gasket 33 away from the small valve needle 31 .
  • the small stopper structure 60 is provided to compress the small sealing gasket 33 to ensure that the small sealing gasket 33 will not fall off.
  • the small sealing gasket 33 is arranged in the cavity of the large valve needle part 32, And through the limited cooperation between the small limit structure 60 and the side of the small sealing gasket 33 away from the small valve needle 31, in this way, the small limit structure 60 can limit the small sealing gasket 33 to compress the small sealing gasket 33. It effectively prevents the small sealing gasket 33 from falling off due to the deformation of the small sealing gasket 33 after long-term use, thereby reducing the sealing effect of the small valve port 331.
  • the electronic expansion valve can be installed on the installation base or in the valve body.
  • the large valve needle portion 32 has a limiting groove 322, the opening of the limiting groove 322 faces the small limiting structure 60, the thickness of the small sealing gasket 33 is greater than the depth of the limiting groove 322, the small limiting structure 60 and the small sealing gasket 33 One side protruding from the limiting groove 322 abuts against it.
  • the limiting groove 322 it is convenient to install the small sealing gasket 33, and the thickness of the small sealing gasket 33 is set to be greater than the depth of the limiting groove 322, so that one side of the small limiting structure 60 and the small sealing gasket 33 abuts to ensure that The sealing effect of small gasket 33 is improved.
  • the large valve needle part 32 also has a second limit groove, the radial dimension of the second limit groove is larger than the limit groove 322, the limit groove 322 and the second limit groove form a stepped structure, and the small limit structure 60 is an annular structure, the outer wall of the small limiting structure 60 is welded to the inner wall of the second limiting groove, the small limiting structure 60 and the small valve port 331 are coaxially arranged, and the inner diameter of the small limiting structure 60 is greater than or equal to the small valve port 331 minimum radial dimension.
  • the electronic expansion valve also includes a valve sleeve
  • the valve seat component 10 includes a valve seat ring and a base, and the valve sleeve, valve seat ring, and base are sequentially connected
  • the electronic expansion valve also includes a nut structure, and the nut structure Located inside the valve sleeve, the area between the nut structure and the inner wall of the valve sleeve forms a rotor cavity.
  • the electronic expansion valve is provided with a balance channel to connect the rotor cavity, the small valve port and the large valve port.
  • the balance channel includes a first channel, a second channel, a third channel and a fourth channel connected in sequence, wherein the first channel is located in the nut structure, the second channel is located in the seat ring, and the third channel Located on the side wall of the connecting sleeve, the fourth channel is located in the small valve needle 31, which realizes the communication between the rotor cavity, the small valve port and the large valve port through the balance channel, and avoids a large pressure in the rotor cavity and the small valve port Poor, avoiding the large pressure difference between the two ends of the small valve needle and the large valve needle, which leads to the problem of poor valve closing.
  • the valve needle part 30 includes: a first pressing sleeve 70, which is arranged in the cavity of the large valve needle part 32, and the first pressing sleeve 70 and the first inner sealing ring 37 are limitedly fitted to press Hold the first inner sealing ring 37; the second pressure sleeve 80, the second pressure sleeve 80 is fixedly connected with the large valve needle part 32, the second pressure sleeve 80 and the first pressure sleeve 70 abut against the side away from the first inner sealing ring 37 catch.
  • the first inner sealing ring 37 can be limited by setting the first pressure sleeve 70 and the first inner sealing ring 37 in position-limiting fit to press the first inner sealing ring 37, and the second inner sealing ring 37 can be limited.
  • the pressure sleeve 80 and the first pressure sleeve 70 abut against the side away from the first inner sealing ring 37 to compress the first pressure sleeve 70.
  • the second pressure sleeve 80 is fixedly connected to the large valve needle part 32. This connection method Stable and reliable.
  • the first pressure sleeve 70 is pressed by the second pressure sleeve 80, and the second pressure sleeve 80 is fixedly connected with the large valve needle part 32, and then the first inner sealing ring 37 is compressed by the first pressure sleeve 70, This further prevents the first inner sealing ring 37 from falling off, effectively solves the problem that the first pressure sleeve 70 is loose and the first inner sealing ring 37 is prone to falling off due to long-term use, and also improves the safety of the valve needle parts. service life.
  • the end faces of the second pressure sleeve 80 and the large valve needle portion 32 are welded, so that the connection is reliable, and the second pressure sleeve 80 and the first pressure sleeve 70 will not become loose.
  • the second pressing sleeve 80 is relatively far away from the first inner sealing ring 37 , and the welding heat will not deform the first inner sealing ring 37 .
  • the inner wall of the large valve needle portion 32 has a stepped first annular step 11 and a second annular step 12, the first inner sealing ring 37 is arranged in the first annular step 11, and the first pressure sleeve 70 is arranged in the second annular step.
  • a part of the second pressing sleeve 80 penetrates into the second annular step 12 .
  • the first annular step 11 is provided to facilitate the placement of the first inner sealing ring 37, and can play a limiting role in the circumferential direction;
  • the second annular step 12 is provided to facilitate the placement of the first compression sleeve 70 to compress the first inner sealing ring. Seal ring 37.
  • a part of the second compression sleeve 80 is inserted into the second annular step 12 for abutting against the first compression sleeve 70 to compress the first compression sleeve 70 .
  • the second compression sleeve 80 includes a first cylindrical section 41, a transition section 42 and a second cylindrical section 43 connected in sequence, the outer diameter of the first cylindrical section 41 is greater than the outer diameter of the second cylindrical section 43, A part of the second cylindrical section 43 penetrates into the cavity of the large valve needle part 32 , the second cylindrical section 43 abuts against the first pressing sleeve 70 , the outer wall of the second cylindrical section 43 and the outer wall of the large valve needle part 32 End welded.
  • At least a part of the second cylindrical section 43 is inserted into the cavity of the large valve needle part 32, and the second cylindrical section 43 abuts against the first compression sleeve 70, thus ensuring that the first compression sleeve 70 can compress the first compression sleeve 70.
  • An inner sealing ring 37 weld the outer wall of the second cylindrical section 43 and the end face of the large valve needle part 32 to weld, thus ensuring that the heat generated during welding will not cause deformation of the first inner sealing ring 37, thereby affecting the first inner sealing ring 37 A sealing effect of the inner sealing ring 37.
  • the end of the second cylindrical section 43 facing the first pressure sleeve 70 is provided with a chamfer or rounded corner, which facilitates the second cylindrical section 43 to penetrate into the cavity of the large valve needle part 32 .
  • the first pressing sleeve 70 is an annular plate, and the inner diameter of the first pressing sleeve 70 is larger than the inner diameter of the first inner sealing ring 37 .
  • the first pressure sleeve 70 is set as an annular plate, which is used to match the shape of the second annular step 12 for easy installation; the inner diameter of the first pressure sleeve 70 is set to be larger than the inner diameter of the first inner sealing ring 37, so that it will not wear
  • the fittings such as the valve pin entering the first inner sealing ring 37 will have an impact.
  • the first inner sealing ring 37 is located between the guide hole 321 and the first compression sleeve 70, the guide hole 321, the first inner sealing ring 37 and the ring plate are arranged coaxially, and the diameter of the guide hole 321 is equal to the inner diameter of the ring plate.
  • the guide hole 321, the first inner sealing ring 37 and the annular plate are arranged coaxially, which is convenient for assembling and sealing the valve needle.
  • the outer wall of the second pressing sleeve 80 has a sealing groove 44
  • the valve needle component further includes a second inner sealing ring 38
  • the second inner sealing ring 38 is disposed in the sealing groove 44 .
  • the small valve needle 31 includes a limiting rod 71 and a blocking rod 72 connected to each other, the radial dimension of the limiting rod 71 is larger than that of the blocking rod 72, and the blocking rod 72 passes through the first inner sealing ring 37 And cooperate with the small valve port 331, the limit rod 71 is located in the cavity of the second pressure sleeve 80, the limit rod 71 is matched with the first pressure sleeve 70 on the axial side, and the limit rod 71 is in the axial direction. The other side and the second pressing sleeve 80 stop fit.
  • the radial dimension of the limiting rod 71 is set to be larger than the radial dimension of the blocking rod 72, and the limiting rod 71 is matched with the first compression sleeve 70 on one side in the axial direction, and the limiting rod 71 is in the axial direction.
  • the other side cooperates with the stopper of the second pressure sleeve 80 , so that the small valve needle 31 can play a limiting role when the small valve needle 31 is moving, thereby limiting the moving range of the small valve needle 31 .
  • the small valve needle 31 can drive the large valve needle portion 32 to move.
  • the valve seat component 10 includes: a base 17, the side wall of the base 17 has a first flow hole 13, and the bottom wall of the base 17 has a second flow hole 14; a valve seat ring 90, a valve seat ring 90 and one end of the base 17 are welded, the seat ring 90
  • the outer peripheral surface of the joint with the base 17 has an annular avoidance groove 91 , and the welding position of the valve seat ring 90 and the base 17 is located in the annular avoidance groove 91 .
  • the solution of setting the first flow hole 13 on the seat ring 90 in the prior art is abandoned, but the first flow hole 13 is set on the side wall of the base 17, which further reduces the valve seat ring. 90 processing difficulty, thereby reducing production costs; and an annular avoidance groove 91 is provided on the outer peripheral surface of the seat ring 90 and the base 17, and the welding position of the valve seat ring 90 and the base 17 is located in the annular avoidance groove 91 , so that the welding surface formed after welding the seat ring 90 and the base 17 is located in the annular avoidance groove 91, thereby avoiding the influence of the welding surface formed after welding on the assembly of the electronic expansion valve.
  • the electronic expansion valve can be installed on the installation base or in the valve body.
  • first circulation holes 13 there are a plurality of first circulation holes 13 , and the plurality of first circulation holes 13 are distributed in the circumferential direction of the base 17 .
  • the outer peripheral surface of the base 17 has a third annular step 15
  • the outer peripheral surface of the valve seat ring 90 has a fourth annular step 92
  • the third annular step 15 and the fourth annular step 92 form an annular relief groove 91 .
  • the seat ring 90 has a fifth annular step 22 , a part of the seat ring 90 penetrates into the cavity of the base 17 , and the end surface and the inner wall of the base 17 are limitedly fitted with the fifth annular step 22 .
  • the fifth annular step 22 is provided to limit the insertion depth of the seat ring 90 when the seat ring 90 penetrates into the cavity of the base 17 .
  • the outer wall of the base 17 has a first accommodating groove 16 for installing a sealing ring
  • the outer wall of the seat ring 90 has a second accommodating groove 93 for installing a sealing ring
  • the first flow hole 13 is located at the first Between the receiving groove 16 and the second receiving groove 93 .
  • the outer wall of the valve seat ring 90 has an external thread for connecting with an external structure, and/or the valve seat ring 90 has an operation hole 24 for cooperating with an installation tool.
  • an installation tool can be inserted into the operation hole 24 to tighten or loosen the electronic expansion valve.
  • the electronic expansion valve further includes a valve sleeve 100 , and the end of the valve seat ring 90 away from the base 17 penetrates into the valve sleeve 100 and is welded with the valve sleeve 100 .
  • the welding connection method is adopted, which is stable and reliable.
  • the valve seat ring 90 includes a first barrel section 94, a second barrel section 95, a third barrel section 96, a connecting section 97 and a guide section 98 connected in sequence, and the outer diameter of the second barrel section 95 is larger than that of the first barrel section.
  • the outer wall of the cylinder section 96 has a second receiving groove 93 for installing the sealing ring, and the outer wall of the second cylinder section 95 has an external thread.
  • a connecting section 97 is provided to facilitate welding with the base 17; a guide section 98 is provided, and the guide section 98 is inserted into the base 17, so that the valve seat ring 90 can be guided during assembly;
  • the outer wall of the third barrel section 96 is provided with a second receiving groove 93, which is convenient for placing the gasket and improving the sealing effect;
  • the outer wall of the second barrel section 95 is provided with external threads, which is convenient for detachable connection with the external structure and improves the electronic expansion valve. versatility.
  • the outer diameter of the third barrel section 96 is equal to the outer diameter of the base 17 .
  • the outer side of the large sealing gasket 20 has a sixth annular step 23, and the reinforced sealing ring 40 is arranged in the sixth annular step 23, and the inner surface of the reinforced sealing ring 40 and the cavity of the valve seat member 10, Bottoms are all abutted.
  • the sixth annular step 23 it is convenient to place the reinforced sealing ring 40; the inner surface and the bottom surface of the reinforced sealing ring 40 and the valve seat member 10 cavity are all abutted, so that the sealing effect of the large sealing gasket 20 can be effectively guaranteed, This prevents fluid leakage from the valve seat part 10 after the deformation of the large sealing gasket 20 for a long time.
  • the large limit structure 50 includes a compression ring 51 and a connecting ring 52 connected to each other, the compression ring 51 abuts against the large gasket 20, the connection ring 52 is located on the side of the compression ring 51 away from the large gasket 20, and the connection The ring 52 is welded to the inner wall of the valve seat member 10 .
  • the connecting ring 52 is arranged on the side where the compression ring 51 is away from the large gasket 20, so that it is convenient to the valve seat part
  • the inner wall of 10 is welded to ensure that the large sealing gasket 20 will not fall off, and at the same time, it can be far away from the large sealing gasket 20 and the reinforced sealing ring 40, so as to prevent the excessive heat during welding from causing the large sealing gasket 20 and the reinforced sealing ring 40 Deformation due to heat.
  • the outer side of the large sealing gasket 20 has a seventh annular step 25 , and the large limiting structure 50 and the seventh annular step 25 are limitedly fitted.
  • the seventh annular step 25 it is convenient to carry out limit cooperation with the large limit structure 50 to limit the movement range of the large limit structure 50 , wherein the pressing ring 51 and the seventh annular step 25 are limit fit.
  • the reinforcing sealing ring 40 is made of soft material. In this way, the sealing effect of the reinforced sealing ring 40 can be improved.
  • the reinforced sealing ring 40 is made of plastic or rubber.
  • the large valve needle portion 32 is a hollow structure, and the end of the large valve needle portion 32 has a sealing surface 411 for sealingly fitting with the large sealing gasket 20 , and the sealing surface 411 is an arc-shaped surface.
  • the sealing surface 411 is an arc-shaped surface.
  • the large valve needle portion 32 has a placement groove 212 communicating with the limiting groove 322, the radial dimension of the placing groove 212 is larger than the radial dimension of the limiting groove 322, and the small limiting structure 60 is positioned Inside the groove 212.
  • the placement groove 212 it is convenient to place the small limiting structure 60; and the radial dimension of the placement groove 212 is set larger than the radial dimension of the limiting groove 322, so that when assembling, it is convenient to place the small sealing gasket 33 in the limiting groove 322 Then place a small stop structure 60 to compress the small gasket 33.
  • the small limiting structure 60 is an annular structure
  • the outer wall of the small limiting structure 60 is welded to the inner wall of the placement groove 212
  • the small limiting structure 60 and the small valve port 331 are coaxially arranged
  • the inner diameter of the small limiting structure 60 is larger than It is equal to the smallest radial dimension of the small valve port 331 .
  • the small limiting structure 60 is arranged as an annular structure, which can match the shape of the placement groove 212 and is convenient for assembly; the outer sidewall of the small limiting structure 60 and the inner sidewall of the placement groove 212 are welded to further ensure that the small gasket 33 will not take off
  • the connection method is welded, which is stable and reliable; the small limit structure 60 and the small valve port 331 are coaxially arranged, and the inner diameter of the small limit structure 60 is set to be greater than or equal to the minimum radial dimension of the small valve port 331, which is convenient Assemble the small valve needle 31 and seal the small valve port 331 .
  • the large opening end of the small valve port 331 is away from the small limiting structure 60 .
  • the end of the small valve port 331 with a large opening is away from the small limit structure 60, so that with the cooperation of the small valve needle 31 and the small valve port 331, the flow adjustment can be more accurately realized to meet the use requirements.
  • the large valve needle part 32 has a side opening 213, and the side opening 213 is located on the side of the small sealing gasket 33 away from the small limiting structure 60.
  • the small valve port 331 When the small valve port 331 is opened, the small valve port 331 passes through the side opening. 213 communicates with the first flow hole 13 .
  • the large valve needle part 32 is provided with a side opening 213.
  • the side opening 213 is located on the side of the small sealing gasket 33 away from the small limiting structure 60 , so that the interference between the side opening 213 and the small limiting structure 60 can be avoided, and the valve needle component 30 has a compact structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lift Valve (AREA)

Abstract

Détendeur électronique comprenant un élément de siège de soupape (10) ; un joint d'étanchéité plus grand (20), qui est agencé à l'intérieur d'une cavité de l'élément de siège de soupape, présente un grand orifice de soupape (21) et est composé d'un matériau souple ; et un élément d'aiguille de soupape (30), qui est agencé à l'intérieur de la cavité de l'élément de siège de soupape et comprend une aiguille de soupape plus petite (31), une partie d'aiguille de soupape plus grande (32) et un petit joint d'étanchéité (33), le petit joint d'étanchéité étant agencé dans la partie d'aiguille de soupape plus grande, et le petit joint d'étanchéité présentant un petit orifice de soupape (331) et étant composé d'un matériau souple, la partie d'aiguille de soupape plus grande étant configurée pour coopérer avec le grand joint d'étanchéité pour ouvrir et fermer le grand orifice de soupape, et l'aiguille de soupape plus petite étant configurée pour coopérer avec le petit joint d'étanchéité pour régler l'ouverture du petit orifice de soupape. Dans le détendeur électronique, à la fois le grand joint d'étanchéité et le petit joint d'étanchéité sont composés du matériau souple de sorte que le problème de mauvais effet d'étanchéité du détendeur électronique est résolu au moyen d'une étanchéité souple ; l'aiguille de soupape plus petite coopère avec le petit joint d'étanchéité pour régler l'ouverture du petit orifice de soupape de sorte qu'une régulation de faible écoulement est réalisée ; et la partie d'aiguille de soupape plus grande coopère avec le grand joint d'étanchéité pour ouvrir ou fermer le grand orifice de soupape, ce qui permet d'obtenir un écoulement important.
PCT/CN2023/072428 2022-01-30 2023-01-16 Détendeur électronique WO2023143202A1 (fr)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
CN202210114497.4A CN116557550A (zh) 2022-01-30 2022-01-30 电子膨胀阀
CN202220250089.7U CN216742911U (zh) 2022-01-30 2022-01-30 阀针部件及电子膨胀阀
CN202210114497.4 2022-01-30
CN202220249819.1U CN219035576U (zh) 2022-01-30 2022-01-30 电子膨胀阀
CN202220250087.8U CN217401728U (zh) 2022-01-30 2022-01-30 电子膨胀阀
CN202220250089.7 2022-01-30
CN202220250108.6U CN216742912U (zh) 2022-01-30 2022-01-30 电子膨胀阀
CN202220250108.6 2022-01-30
CN202220249819.1 2022-01-30
CN202220250087.8 2022-01-30

Publications (1)

Publication Number Publication Date
WO2023143202A1 true WO2023143202A1 (fr) 2023-08-03

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PCT/CN2023/072428 WO2023143202A1 (fr) 2022-01-30 2023-01-16 Détendeur électronique

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Country Link
WO (1) WO2023143202A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6454183A (en) * 1987-05-08 1989-03-01 Saginomiya Seisakusho Inc Two stage type expansion valve
CN208153800U (zh) * 2018-02-11 2018-11-27 浙江盾安机械有限公司 一种二段式电子膨胀阀
CN109723877A (zh) * 2017-10-27 2019-05-07 浙江三花制冷集团有限公司 一种电动阀
CN209762383U (zh) * 2018-12-07 2019-12-10 浙江盾安禾田金属有限公司 电子膨胀阀
KR20210096676A (ko) * 2019-04-02 2021-08-05 저장 산후아 클라이메이트 앤드 어플라이언스 컨트롤스 그룹 컴퍼니 리미티드 전기밸브
CN216742911U (zh) * 2022-01-30 2022-06-14 盾安汽车热管理科技有限公司 阀针部件及电子膨胀阀
CN216742910U (zh) * 2022-01-30 2022-06-14 盾安汽车热管理科技有限公司 电子膨胀阀
CN216742912U (zh) * 2022-01-30 2022-06-14 盾安汽车热管理科技有限公司 电子膨胀阀
CN217401728U (zh) * 2022-01-30 2022-09-09 盾安汽车热管理科技有限公司 电子膨胀阀

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6454183A (en) * 1987-05-08 1989-03-01 Saginomiya Seisakusho Inc Two stage type expansion valve
CN109723877A (zh) * 2017-10-27 2019-05-07 浙江三花制冷集团有限公司 一种电动阀
CN208153800U (zh) * 2018-02-11 2018-11-27 浙江盾安机械有限公司 一种二段式电子膨胀阀
CN209762383U (zh) * 2018-12-07 2019-12-10 浙江盾安禾田金属有限公司 电子膨胀阀
KR20210096676A (ko) * 2019-04-02 2021-08-05 저장 산후아 클라이메이트 앤드 어플라이언스 컨트롤스 그룹 컴퍼니 리미티드 전기밸브
CN216742911U (zh) * 2022-01-30 2022-06-14 盾安汽车热管理科技有限公司 阀针部件及电子膨胀阀
CN216742910U (zh) * 2022-01-30 2022-06-14 盾安汽车热管理科技有限公司 电子膨胀阀
CN216742912U (zh) * 2022-01-30 2022-06-14 盾安汽车热管理科技有限公司 电子膨胀阀
CN217401728U (zh) * 2022-01-30 2022-09-09 盾安汽车热管理科技有限公司 电子膨胀阀

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