WO2020083065A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

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Publication number
WO2020083065A1
WO2020083065A1 PCT/CN2019/111073 CN2019111073W WO2020083065A1 WO 2020083065 A1 WO2020083065 A1 WO 2020083065A1 CN 2019111073 W CN2019111073 W CN 2019111073W WO 2020083065 A1 WO2020083065 A1 WO 2020083065A1
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WO
WIPO (PCT)
Prior art keywords
electronic expansion
expansion valve
screw
valve
protrusion
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/111073
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English (en)
French (fr)
Inventor
詹少军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dunan Artificial Environment Co Ltd
Original Assignee
Zhejiang Dunan Artificial Environment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Dunan Artificial Environment Co Ltd filed Critical Zhejiang Dunan Artificial Environment Co Ltd
Publication of WO2020083065A1 publication Critical patent/WO2020083065A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • 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

Definitions

  • This application relates to the technical field of refrigeration equipment, in particular to an electronic expansion valve.
  • 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 the flow rate and throttle and reducing the pressure, and is widely used in the field of refrigeration equipment technology.
  • the existing electronic expansion valve generally welds the screw rod and the connecting seat directly, which leads to the need to release the connection between the screw rod and the connecting seat at one end of the existing electronic expansion valve during subsequent maintenance or during mass production. When the connection is fixed, the screw or the connecting seat will be damaged. This increases the maintenance and production costs of electronic expansion valves.
  • This application provides an electronic expansion valve, including:
  • a connecting base, the connecting base is fixedly connected to the rotor
  • a screw rod, the first end of the screw rod passes through and extends out of the connecting seat
  • the electronic expansion valve further includes a fixed cap, the fixed cap is fixedly connected to the first end of the screw rod, and a rotation preventing connection is formed between the fixed cap and the connection seat.
  • the fixing cap is welded and fixed between the first end of the screw rod; or,
  • the fixing cap and the first end of the screw rod are riveted and fixed.
  • a first protrusion is protruded on the outer surface of the screw rod, and the first protrusion and the fixing cap respectively bear on both sides of the connecting seat, and axially restrict the screw rod Located on the connecting seat.
  • the connecting seat is provided with a second protrusion on a side relatively close to the fixing cap, and the second protrusion is sleeved on the screw rod;
  • the fixing cap includes a stepped distribution between each other A first sleeve portion, an abutting portion, and a second sleeve portion, the first sleeve portion sleeves the first end of the screw, and the abutting portion bears against the second protrusion At the end surface, the second sleeve portion sleeves the outer surface of the second protrusion.
  • the second protrusion has a special shape
  • the inner cavity of the second sleeve portion is a shaped cavity
  • the second sleeve portion and the second protrusion form a rotation-preventing connection through a special shape
  • the electronic expansion valve further includes a stopper, and one end of the stopper protruding from the connection seat forms a collar, and the collar surrounds the second protrusion and is disposed on the connection seat Between the fixing cap and the fixing cap, the fixing cap bears against the collar.
  • the inner wall of the collar has a special shape, and the inner wall of the collar and the outer side of the second protrusion form an anti-rotation connection through a special shape.
  • the electronic expansion valve further includes a stopper, the stopper protrudes from one end of the connection seat to form a collar; the outer side of the second protrusion extends outward and forms a stepped portion, the stepped portion
  • the outer side surface of the portion is a cylindrical surface
  • the inner side surface of the collar is an annular surface
  • the collar surrounds the stepped portion, and the collar and the stepped portion are fixedly connected.
  • the collar is a closed ring; or,
  • the collar is provided with a gap.
  • the electronic expansion valve further includes a valve body and a nut sleeve, the nut sleeve is fixedly connected to the valve body and forms a threaded fit with the screw rod.
  • the electronic expansion valve further includes a valve needle assembly
  • the screw rod further includes a second end disposed away from the first end, and the second end of the screw rod is connected to the valve needle assembly and The valve needle assembly can be driven to reciprocate.
  • the electronic expansion valve further includes a guide sleeve, the guide sleeve is fixedly connected to the valve body and sleeves the valve needle assembly.
  • the electronic expansion valve further includes a sleeve, the sleeve is connected to the guide sleeve and forms a lumen with the guide sleeve, and the rotor, the connecting seat and the fixing cap are all contained in the tube Cavity.
  • the electronic expansion valve further includes a stop ring.
  • the stop ring is wound around the nut sleeve and fixedly connected to the guide sleeve.
  • the electronic expansion valve further includes a valve seat, and a valve port is opened on the valve seat and fixedly connected to the valve body; the valve needle assembly can be moved back and forth under the driving of the screw rod and controlled The opening and closing of the valve port.
  • the electronic expansion valve provided in the present application is provided with a fixed cap fixedly connected with the screw rod, and the fixed cap is used to bear the fixed connection relationship between the connection seat and the screw rod. Due to the small size of the fixed cap, less material loss, and very low cost, the electronic expansion valve can be recovered by mass destruction by removing the cooperation of the screw and the fixed cap when the unqualified product appears in mass production. The value of the screw and the rotor assembly connected to the screw, which helps reduce maintenance and production costs.
  • Figure 1 is a schematic cross-sectional view of an electronic expansion valve in one embodiment of the present application.
  • FIG. 2 is a schematic cross-sectional view of the electronic expansion valve shown in FIG. 1 from another perspective.
  • FIG. 3 is a schematic structural view of the electronic expansion valve shown in FIG. 1 after omitting part of the structure.
  • FIG. 4 is a schematic diagram of disassembly of the electronic expansion valve shown in FIG. 3.
  • FIG. 5 is a schematic structural view of the connecting seat in the electronic expansion valve shown in FIG. 3.
  • FIG. 6 is an enlarged schematic view of the electronic expansion valve shown in FIG. 1 at A.
  • FIG. 6 is an enlarged schematic view of the electronic expansion valve shown in FIG. 1 at A.
  • Fig. 7 is a schematic perspective disassembly diagram of the electronic expansion valve in the second embodiment of the present application after omitting part of the structure.
  • FIG. 8 is a schematic perspective disassembly diagram of the electronic expansion valve in the third embodiment of the present application after omitting part of the structure.
  • FIG. 1 is a schematic cross-sectional view of an electronic expansion valve 100 according to an embodiment of the present application.
  • FIG. 2 is a schematic cross-sectional view of the electronic expansion valve 100 shown in FIG. 1 from another perspective.
  • This application provides an electronic expansion valve 100.
  • the electronic expansion valve 100 provided in this application is used to adjust the flow rate and pressure of a fluid medium.
  • the electronic expansion valve 100 is used in an air-conditioning system, and the fluid medium flowing through the electronic expansion valve 100 is a refrigerant used to exchange heat and cold in the air-conditioning system.
  • the electronic expansion valve 100 serves as a boundary element between the high-pressure side and the low-pressure side in the air-conditioning system.
  • the electronic expansion valve 100 throttles and reduces the pressure of the high-pressure liquid refrigerant, thereby regulating and controlling the amount of liquid refrigerant entering the evaporator, thereby making the liquid refrigerant
  • the dosage can be adapted to the requirements of the external cooling load.
  • the electronic expansion valve 100 may also be applied to other refrigeration systems other than air conditioning systems such as refrigerators.
  • 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, a guide sleeve 60, and a stator assembly (not shown).
  • the valve needle assembly 20, the screw assembly 30, and the guide sleeve 60 are all installed on the valve body 10; the valve needle assembly 20 passes through the guide sleeve 60 and is connected to one end of the screw assembly 30; the screw assembly 30 is relatively away from the valve needle assembly One end of 20 is connected to the rotor assembly 50; the sleeve 40 is installed on the guide sleeve 60; the stator assembly acts on the rotor assembly 50 and can drive the rotor assembly 50 to rotate in the energized state.
  • the sleeve 40 and the valve body 10 are substantially enclosed to form a cavity, and the valve needle assembly 20, the screw assembly 30, the rotor assembly 50, and the guide sleeve 60 are all accommodated in the cavity; the stator assembly is disposed outside the sleeve 40.
  • the valve body 10 is used to carry the valve needle assembly 20, the screw assembly 30 and the guide sleeve 60; the valve needle assembly 20 is used to control the opening or closing of the electronic expansion valve 100; the screw assembly 30 is used to drive the movement of the valve needle assembly 20;
  • the tube 40 is used to isolate the external environment from the screw assembly 30 and the rotor assembly 50, thereby protecting the screw assembly 30 and the rotor assembly 50 and preventing medium leakage;
  • the rotor assembly 50 is used to drive the screw assembly 30 to move;
  • the guide sleeve 60 is used to The reciprocating sliding of the needle assembly 20 is guided; the stator assembly is used to drive the rotor assembly 50 to rotate.
  • the stator assembly is energized to generate a magnetic field and drives the rotor assembly 50 to rotate through the action of the magnetic force.
  • the rotor assembly 50 drives the screw assembly 30 to move, and the valve needle assembly 20 slides back and forth under the drive of the screw assembly 30 to control the electronic expansion valve 100 to open or close To complete the process of adjusting the flow and pressure of the fluid medium by the electronic expansion valve 100.
  • valve body 10 is hollow inside and forms a valve cavity 11.
  • the valve body 10 is fixedly provided with a valve seat 12, and a valve port 13 is opened on the valve seat 12, and the valve port 13 and the valve cavity 11 communicate with each other.
  • a medium inlet pipe 101 and a medium outlet pipe 102 are connected to both sides of the valve body 10 respectively.
  • the fluid medium enters the interior of the electronic expansion valve 100 through the medium inlet pipe 101, and then flows out of the electronic expansion valve 100 through the valve port 13 and the medium outlet pipe 102.
  • the valve port 13 is for the valve needle assembly 20 to extend, thereby blocking or allowing the fluid medium in the electronic expansion valve 100 to be discharged outward through the valve port 13.
  • the electronic expansion valve 100 closes, and the medium inlet pipe 101 and the medium outlet pipe 102 are isolated from each other; when the valve needle assembly 20 unseales the valve port 13, the electronic expansion valve 100 opens , The medium inlet pipe 101 and the medium outlet pipe 102 communicate with each other.
  • the screw assembly 30 includes a screw 31 and a nut sleeve 32 sleeved on the screw 31.
  • One end of the screw 31 is connected to the rotor assembly 50, and the other end of the screw 31 is connected to the valve needle assembly 20.
  • the nut sleeve 32 is fixedly connected to the guide sleeve 60 and forms a threaded fit with the screw 31.
  • the sleeve 40 is connected to the guide sleeve 60, and a lumen 41 is formed between the sleeve 40 and the guide sleeve 60.
  • the lumen 41 is used to accommodate the rotor assembly 50 and provide a movement space for the rotor assembly 50 and the screw 31.
  • the bushing 40 isolates the moving elements (rotor assembly 50 and screw 31) of the electronic expansion valve 100 from the external environment, which can prevent people from accidentally touching these moving elements in a working state, and improve the safety performance of the use of the electronic expansion valve 100.
  • the rotor assembly 50 includes a rotor 51 and a connection base 52 fixedly connected to the rotor 51.
  • the rotor 51 is made of a magnetic material, which can rotate under the magnetic drive of the stator assembly.
  • the connecting base 52 is provided with a first through-hole 53, the first through-hole 53 is provided for the screw 31 to extend to realize the nesting relationship between the connecting base 52 and the screw 31 to ensure that the connecting base 52 and the screw 31 Precise positioning to avoid the skew of the screw 31.
  • the specific magnetic rotor 51 rotates under the action of the magnetic field torque provided by the stator assembly, and drives the screw 31 to rotate synchronously through the connection base 52; the screw between the screw 31 and the nut sleeve 32 cooperates to screw the screw
  • the rotary motion of 31 is converted into the telescopic movement of the screw 31 in the axial direction, so that the valve needle assembly 20 connected to the screw 31 is displaced in the axial direction, and the purpose of sealing the valve port 13 or releasing the sealing of the valve port 13 is achieved To control the electronic expansion valve 100 to open or close.
  • the guide sleeve 60 is sleeved with the valve needle assembly 20, which is used to guide the valve needle assembly 20 to move in the axial direction of the electronic expansion valve 100 to ensure that the valve needle assembly 20 can be smoothly aligned and embedded in the valve port 13.
  • the guide sleeve 60 carries the sleeve 40, and the sleeve 40 is connected to the valve body 10 through the guide sleeve 60 to achieve positioning and alignment between the sleeve 40 and the valve body 10.
  • the sleeve 40 may also be directly connected to the valve body 10, and at this time, the sleeve 40 is positioned and collimated on the valve body 10 through direct contact with the valve body 10.
  • the screw and the connecting seat are generally directly welded together.
  • the screw or the connecting seat will be damaged, and even the two will be destroyed together when not operated properly.
  • connection seat is generally produced by a powder metallurgy process, and the connection seat is also expensive. Therefore, the damage of the screw rod or the connecting seat will lead to high maintenance cost and high production cost of the entire electronic expansion valve, which is not conducive to the promotion and application of the electronic expansion valve.
  • FIG. 3 is a schematic structural view of the electronic expansion valve 100 shown in FIG. 1 after omitting part of the structure
  • FIG. 4 is a disassembled schematic view of the electronic expansion valve 100 shown in FIG. 3
  • FIG. 5 is FIG. 3 A schematic structural view of the connecting seat 52 in the electronic expansion valve 100.
  • the electronic expansion valve 100 provided by the present application is provided with a fixed cap 70 fixedly connected to the screw 31, and the fixed cap 70 is used to bear the fixed connection relationship between the connection base 52 and the screw 31. Due to the small size of the fixing cap 70, less material loss, and very low cost, the electronic expansion valve 100 can be used to destroy the fixing cap by removing the cooperation of the screw 31 and the fixing cap 70 when a substandard product occurs in mass production. 70 to recover the screw 31 with high value and the rotor assembly 50 connected to the screw 31, which is beneficial to reduce the cost of maintenance and production.
  • the screw 31 includes a first end 311 and a second end 312, and the first end 311 and the second end 312 are disposed away from each other; the first end 311 of the screw 31 passes from the connecting seat 52 through the first through hole 53 And the cavity formed by the rotor assembly 50 extends inside, and the second end 312 of the screw 31 is connected to the valve needle assembly 20.
  • the fixing cap 70 is fixedly connected to the first end 311 of the screw 31 and forms a rotation-proof connection with the connecting base 52.
  • the fixed connection between the fixed cap 70 and the first end 311 of the screw 31 may be in the form of welding or other fixed connection methods other than welding, such as glue fixing and riveting; the fixed cap
  • the anti-rotation connection between the 70 and the connecting base 52 can be achieved by setting a baffle on the connecting base 52 that can fix the fixing cap 70, or by setting between the fixing cap 70 and the connecting base 52
  • the special-shaped fit can also be achieved by welding, riveting, screwing, keying, and gluing between the fixed cap 70 and the connecting base 52.
  • the present application does not limit the specific form of the fixed connection between the fixed cap 70 and the first end 311 of the screw 31, nor the specific structure of the anti-rotation connection between the fixed cap 70 and the connecting seat 52, as long as the fixed cap 70 and the first One end 311 is fixed to each other, and the connecting base 52 can transmit the rotary motion provided by the rotor assembly 50 to the fixing cap 70.
  • the fixing cap 70 as a central component connects the screw 31 and the connecting base 52 respectively. This avoids direct welding between the screw 31 and the connecting base 52 and releases the fixed cooperation between the connecting base 52 and the screw 31.
  • the electronic expansion valve 100 needs maintenance, or needs to be disassembled and recycled due to quality problems during mass production, it is only necessary to destroy the fixing cap 70 with low processing difficulty and low cost, and the expensive screw 31 and Connector 52. This can reduce the production and maintenance cost of the electronic expansion valve 100 and improve the cost-effectiveness of the product, and enhance the competitiveness of the product in the market.
  • the fixing cap 70 and the first end 311 of the screw 31 are welded and fixed. At this time, the fixing cap 70 and the first end 311 of the screw 31 have better connection reliability, and the working life of the entire electronic expansion valve 100 is longer.
  • the fixing cap 70 and the first end 311 of the screw 31 can also be riveted and fixed. Riveting and fixing between the fixing cap 70 and the first end 311 of the screw 31 can avoid direct welding between the fixing cap 70 and the screw 31.
  • connection base 52 in the industry is often made of stainless steel material through powder metallurgy process, the connection base 52 at this time is easily oxidized and blackened by the influence of high temperature during welding, which leads to some black soldering positions that are easily susceptible to black oxide layer Coverage makes it more difficult for operators to inspect the quality of welds based on their own experience.
  • the fixing cap 70 and the first end 311 of the screw 31 are fixed by riveting, which can avoid the occurrence of leakage welding and help to improve the product quality of the electronic expansion valve 100.
  • FIG. 6 is an enlarged schematic view of the electronic expansion valve 100 shown in FIG. 1 at A.
  • the outer surface of the screw 31 is provided with a first protrusion 313 (that is, the outer diameter of the first protrusion 313 is greater than the outer diameter of the screw 31), and the first protrusion 313 abuts the side of the connecting base 52 to be fixed
  • the cap 70 resists the other side of the connecting seat 52; the first protrusion 313 and the fixing cap 70 cooperate with each other and resist both sides of the connecting seat 52, thereby axially restricting the screw 31 on the connecting seat 52.
  • the first protrusion 313 and the fixing cap 70 cooperate with each other and “axially restrict” the screw 31 on the connecting seat 52, which means that both ends of the screw 31 are respectively fixed by the first protrusion 313 and The cap 70 is limited, so that there is no slippage between the screw 31 and the connecting seat 52 in the axial direction of the screw 31, and the screw 31 cannot slide along the first through hole 53.
  • the axial limitation of the screw 31 on the connection seat 52 makes the screw 31 slide stably in the direction away from the valve needle assembly 20 or in the direction close to the valve needle assembly 20, can be stably connected to the connection ⁇ 52. This can ensure the accuracy of the movement of the screw 31, thereby ensuring the valve opening performance of the entire electronic expansion valve 100; at the same time, the axial limit of the screw 31 also improves the stability of the movement of the screw 31 when it rotates synchronously with the connecting base 52, It helps to ensure the smooth operation of the entire electronic expansion valve 100.
  • the first protrusion 313 on the screw 31 directly abuts the connecting seat 52 to achieve the axial limit, which is more convenient in installation.
  • the electronic expansion valve 100 also adopts other methods to achieve the axial limit between the connecting seat 52 and the screw 31, for example, between the screw 31 and the connecting seat There is direct glue between 52, and the axial limit is achieved by means such as interference fit between the screw 31 and the connecting seat 52.
  • the first protrusion 313 has an annular shape. It can be understood that the first protrusion 313 may also take other shapes other than a circular ring shape such as a truncated cone shape.
  • the resistance of the first protrusion 313 and the fixing cap 70 to the connection seat 52 may be in the form of direct resistance, that is, the first protrusion 313 and the fixing cap 70 directly contact the connection seat 52;
  • the form of indirect resistance can be adopted, that is, the first protrusion 313 and the fixing cap 70 can resist the connection seat 52 through the intermediate transition element.
  • the first protrusion 313 directly abuts the connection base 52, and the fixing cap 70 indirectly abuts the connection base 52.
  • the fixing cap 70 includes a first sleeve portion 71, a second sleeve portion 73, and a contact portion 72 provided between the first sleeve portion 71 and the second sleeve portion 73; One end of the contact portion 72 is connected to the first sleeve portion 71, and the other end is connected to the second sleeve portion 73.
  • the first sleeve portion 71 and the second sleeve portion 73 extend substantially in the axial direction of the screw 31, and the contact portion 72 extends substantially in the radial direction of the screw 31.
  • the first sleeve portion 71, the contact portion 72, and the first The two nesting portions 73 form a stepwise distribution.
  • the connecting seat 52 is provided with a second protrusion 54 on the side relatively away from the valve needle assembly 20 (that is, on the side relatively close to the fixing cap 70), and the first through hole 53 penetrates the connecting seat 52 and the second protrusion 54 at the same time Both the second protrusion 54 and the connecting base 52 sleeve the screw 31 through the first through hole 53.
  • the second protrusion 54 and the connecting base 52 are integrally formed. It can be understood that, in other embodiments, a separate structure may be used between the second protrusion 54 and the connecting base 52; in this case, the second protrusion 54 and the connecting base 52 may be welded, riveted, glued, etc. The ways are fixed to each other.
  • the second protrusion 54 has an end surface 541 extending substantially in the radial direction of the screw 31 and an outer side surface 542 extending substantially in the axial direction of the screw 31.
  • the first sleeve portion 71 on the fixing cap 70 sleeves the first end 311 of the screw 31, the contact portion 82 abuts the end surface 541 of the second protrusion 54, and the second sleeve portion 73 sleeves the second protrusion 54 ⁇ ⁇ 542.
  • the fixing cap 70 is sleeved to ensure the positioning accuracy of the screw 31 and the second protrusion 54 while taking into account the convenience of installation, and also to improve the stability of the connection with the screw 31 and the connecting seat 50 And in the case where the fixing cap 70 needs to be destroyed, the fixing cap 70 can be quickly separated from the screw rod 31 by its nesting relationship on the screw rod 31, which also improves the convenience of disassembly and assembly.
  • the fixed cap 70 may also be clamped to maintain the mutual positioning between the screw 31 and the second protrusion 54; at this time, the fixed cap 70 is clipped on the screw 31 Or, the second protrusion 54 is fixedly connected to the screw 31 and the rotation-proof connection to the second protrusion 54 through an installation process.
  • the second protrusion 54 has a special shape, that is, the outer side 542 of the second protrusion 54 adopts a non-cylindrical shape; correspondingly, the inside of the second sleeve portion 73 of the fixing cap 70
  • the cavity is also a special-shaped cavity, that is, the inner circumference of the second sheath 73 is a non-cylindrical surface.
  • the fixing cap 70 sleeves the outer surface 542 of the second protrusion 54 through the second sleeve portion 73, and forms a rotation-proof connection through the irregular fitting between the second sleeve portion 73 and the second protrusion 54.
  • the second protrusion 54 has a quadrangular prism shape, and the outer side surface 542 of the second protrusion 54 is the outer side surface of the quadrangular prism (including four connected rectangular surfaces); the second sleeve portion of the fixing cap 70
  • the inner circumference of 73 is the shape of the outer side of a quadrangular prism.
  • the second protrusion 54 and the second sleeve portion 73 may also adopt other shapes other than the quadrangular prism, such as a triangular prism, a pentagonal prism, an elliptical cylinder, and a semi-cylindrical column, as long as the second convex It is only necessary that the first 54 and the second sleeve 73 can cooperate with each other and form a rotation preventing connection.
  • the electronic expansion valve 100 does not require additional components such as baffles, and can directly form a rotation-preventing connection only by the shape fit between the second protrusion 54 and the second sleeve portion 83.
  • the irregular cooperation between the second protrusion 54 and the second sleeve 73 improves the compactness and operational stability of the electronic expansion valve 100.
  • the electronic expansion valve 100 further includes a stopper 80, and a second through hole 55 corresponding to the stopper 80 is opened on the connecting seat 52, and the stopper 80 passes through the second through hole 55 from The cavity formed by the rotor assembly 50 and the connecting base 52 protrudes, and is connected to the connecting base 52.
  • the stopper 80 is used to stop the screw assembly 30 so as to define the limit position of the rotor assembly 50 connected to the screw 31.
  • the screw assembly 30 further includes a stop ring 33, which is spiral and wound around the outer side of the nut sleeve 32.
  • the stop ring 33 and the stopper 80 cooperate with each other.
  • the stop ring 33 defines the extreme positions of the rotor assembly 50 and the screw 31 at the upper and lower ends.
  • stop ring 33 is in the shape of a spiral, and the end of the stop ring 33 away from the fixing cap 70 is fixedly connected to the guide sleeve 60 and extends to the outside of the spiral track of the stop ring 33; when the stop 80 moves to itself At the lower limit of the position, the stopper 80 contacts the end of the retainer ring 33 relatively away from the fixed cap 70 and stops its own movement due to movement interference. At this time, the rotor assembly 50 connected to the stopper 80 stops moving synchronously, so that the stop ring 33 limits the lower limit position of the rotor assembly 50.
  • the end of the stop ring 33 relatively close to the fixed cap 70 also extends outside the spiral track of the stop ring 33; when the stop 80 moves to its upper limit position, the stop 80 contacts the stop ring 33 relatively close to the fixed cap 70's end and stop its own movement. At this time, the rotor assembly 50 connected to the stopper 80 stops moving synchronously, so that the limit ring 33 limits the upper limit position of the rotor assembly 50.
  • the stopper 80 includes a rod body 81 and a collar 82 connected to the rod body 81.
  • the rod body 81 is accommodated in a cavity formed by the rotor assembly 50 and the connecting seat 52 at the end away from the fixing cap 70, and the other end passes through the second
  • the through hole 55 extends out of the cavity formed by the rotor assembly 50 and the connecting base 52.
  • the rod body 81 can cooperate with both ends of the stop ring 33 to limit the upper limit position and the lower limit position of the rotor assembly 50.
  • the collar 82 sleeves the outer surface 542 of the second protrusion 54 and is disposed between the connecting seat 52 and the fixing cap 70; the fixing cap 70 resists the collar 82, and acts on the connecting seat 52 through the collar 72, thereby pressing the collar 82 onto the connecting seat 52.
  • the collar 82 can closely adhere to the connection seat 52 under the pressing action of the fixing cap 70, which can avoid the separation between the collar 82 and the connection seat 52, thereby improving the operation stability of the electronic expansion valve 100.
  • the inner wall of the collar 82 is shaped, that is, the inner wall of the collar 82 is a non-circular surface, and the collar 82 and the fixing cap 70 and the outer side surface 542 of the second protrusion 54 are deformed to form a rotation stop at the same time connection.
  • the collar 82 and the second protrusion 54 are shaped to form a rotation-proof connection, so that the collar 82 can be firmly connected to the connection seat 52 without additional processes such as welding or riveting.
  • the rod body 81 is subjected to the stop ring 33 When stopping, the stop effect can be transmitted to the connecting base 52, the rotor 51, and the screw 31 through the rotation preventing connection between the collar 82 and the second protrusion 54.
  • the collar 82 is directly fitted onto the second protrusion 54, which greatly improves the convenience of installation.
  • the collar 82 is a closed ring; or, the collar 82 is a ring with a gap, and the cross-section of the collar 82 is substantially “C” -shaped.
  • the processing cost of the collar 82 is low, which is suitable for mass production.
  • the collar 82 adopts a ring structure with a gap, the collar 82 has a higher degree of deformability due to the existence of the gap, and can match the second protrusion 54 of a larger size range, and the convenience in installation is further improved.
  • FIG. 7 is a three-dimensional disassembly schematic diagram of the electronic expansion valve 100 in the second embodiment of the present application after omitting part of the structure.
  • the second embodiment of the present application is different from the first embodiment of the present application in that the outer side surface 542a of the second protrusion 54a extends outward and forms a stepped portion 56a, and the stepped portion 56a is located on the connecting seat 52a and the second Between the protrusions 54a.
  • the collar 82a in the stopper 80a protrudes from the second through hole 55a and sleeves the outer surface of the second protrusion 54a, and the inner wall surface of the collar 82a is an annular surface, and the outer surface of the step portion 56a
  • the stepped portion 56a is sleeved on the collar 82a as a cylindrical surface.
  • the collar 82a and the stepped portion 56a are fixed to each other by welding, riveting, gluing, or the like.
  • the collar 82a can be produced more easily, and the production cost of the electronic expansion valve 100 is lower.
  • FIG. 8 is a three-dimensional disassembly schematic diagram of the electronic expansion valve 100 in the third embodiment of the present application after omitting part of the structure.
  • the third embodiment of the present application is different from the second embodiment of the present application in that the second through hole 55b in the third embodiment of the present application matches the shape of the rod body 81b to better limit Position rod 81b.
  • the electronic expansion valve 100 provided by the present application is provided with a fixed cap 70 fixedly connected to the screw 31, and the fixed cap 70 is used to bear the fixed connection relationship between the connection base 52 and the screw 31. Due to the small size of the fixing cap 70, less material loss, and very low cost, the electronic expansion valve 100 can be used to destroy the fixing cap by removing the cooperation of the screw 31 and the fixing cap 70 when a substandard product occurs in mass production. 70 to recover the screw 31 with high value and the rotor assembly 50 connected to the screw 31, which is beneficial to reduce the cost of maintenance and production.

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Abstract

一种电子膨胀阀（100），包括：转子（51）；连接座（52），所述连接座（52）固定连接于所述转子（51）；丝杆（31），所述丝杆（31）的第一端（311）穿设并伸出所述连接座（52）；所述电子膨胀阀（100）还包括固定帽（70），所述固定帽（70）固定连接于所述丝杆（31）的第一端（311），且所述固定帽（70）与所述连接座（52）之间形成止转连接。该电子膨胀阀（100），通过设置与丝杆（31）固定连接的固定帽（70），利用固定帽（70）承受连接座（52）与丝杆（31）之间的固定连接关系。由于固定帽（70）体型较小，材料损耗较少，造价十分低廉，因此电子膨胀阀（100）在批量生产而出现不合格产品时，就可以通过拆除丝杆（31）与固定帽（70）的配合，利用破坏固定帽（70）来回收具有高价值的丝杆（31）以及连接于丝杆（31）的转子组件（50），这有利于降低维护和生产上的成本。

Description

电子膨胀阀
相关申请
本申请要求2018年10月22日申请的，申请号为201821713766.4，名称为“电子膨胀阀”的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
本申请涉及制冷设备技术领域，特别是涉及一种电子膨胀阀。
背景技术
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。现有的电子膨胀阀一般将丝杆与连接座直接焊接固定，这导致现有的电子膨胀阀在后续的维护过程中或者在大批量生产时，一端出现需要解除丝杆与连接座之间的固定连接关系时，就会导致丝杆或者连接座的破损。这提高了电子膨胀阀的维护和生产成本。
申请内容
基于此，针对上述问题，有必要提供一种维护和生产成本较低、具有较高回收利用价值的电子膨胀阀。
本申请提供一种电子膨胀阀，包括：
转子；
连接座，所述连接座固定连接于所述转子；
丝杆，所述丝杆的第一端穿设并伸出所述连接座；
所述电子膨胀阀还包括固定帽，所述固定帽固定连接于所述丝杆的第一端，且所述固定帽与所述连接座之间形成止转连接。
进一步地，所述固定帽与所述丝杆的第一端之间焊接固定；或者，
所述固定帽与所述丝杆的第一端之间铆接固定。
进一步地，所述丝杆的外侧面上凸设有第一凸起，所述第一凸起与所述固定帽分别抵持所述连接座的两侧，并将所述丝杆轴向限位于所述连接座上。
进一步地，所述连接座在相对靠近所述固定帽的一侧凸设有第二凸起，所述第二凸起套设所述丝杆；所述固定帽包括相互之间呈阶梯状分布的第一套设部、抵接部以及第二套设部，所述第一套设部套设所述丝杆的第一端，所述抵接部抵持于所述第二凸起的端面，所述第二套设部套设所述第二凸起的外侧面。
进一步地，所述第二凸起呈异形，所述第二套设部的内腔为异形腔，所述第二套设部与所述第二凸起之间通过异形配合形成止转连接。
进一步地，所述电子膨胀阀还包括止动件，所述止动件伸出所述连接座的一端形成套环，所述套环套设所述第二凸起并设置于所述连接座与所述固定帽之间，所述固定帽抵持于所述套环。
进一步地，所述套环的内壁呈异形，所述套环的内壁与所述第二凸起的外侧面之间通过异形配合形成止转连接。
进一步地，所述电子膨胀阀还包括止动件，所述止动件伸出所述连接座的一端形成套环；所述第二凸起的外侧面向外延伸并形成台阶部，所述台阶部的外侧面为圆柱面，所述套环的内侧面为圆环面，所述套环套设所述台阶部，且所述套环与所述台阶部之间固定连接。
进一步地，所述套环为封闭的环形；或者，
所述套环上开设有缺口。
进一步地，所述电子膨胀阀还包括阀体及螺母套，所述螺母套固定连接于所述阀体并与所述丝杆之间形成螺纹配合。
进一步地，所述电子膨胀阀还包括阀针组件，所述丝杆还包括与所述第 一端相背离设置的第二端，所述丝杆的第二端连接于所述阀针组件并能够带动所述阀针组件往复移动。
进一步地，所述电子膨胀阀还包括导向套，所述导向套固定连接于所述阀体并套设所述阀针组件。
进一步地，所述电子膨胀阀还包括套管，所述套管连接于所述导向套并与所述导向套之间形成管腔，所述转子、连接座及固定帽均收容于所述管腔内。
进一步地，所述电子膨胀阀还包括止挡圈，所述止挡圈绕设所述螺母套且固定连接于所述导向套。
进一步地，所述电子膨胀阀还包括阀座，所述阀座上开设有阀口并固定连接于所述阀体；所述阀针组件能够在所述丝杆的带动下往复移动，并控制所述阀口的开闭。
本申请提供的电子膨胀阀，通过设置与丝杆固定连接的固定帽，利用固定帽承受连接座与丝杆之间的固定连接关系。由于固定帽体型较小，材料损耗较少，造价十分低廉，因此电子膨胀阀在批量生产而出现不合格产品时，就可以通过拆除丝杆与固定帽的配合，利用破坏固定帽来回收具有高价值的丝杆以及连接于丝杆的转子组件，这有利于降低维护和生产上的成本。
附图说明
图1为本申请一个实施方式中电子膨胀阀的剖视示意图.
图2为图1所示电子膨胀阀在另一视角下的剖视示意图。
图3为图1所示电子膨胀阀省略部分结构后的结构示意图。
图4为图3所示电子膨胀阀的拆解示意图。
图5为图3所述电子膨胀阀中连接座的结构示意图。
图6为图1所示电子膨胀阀在A处的放大示意图。
图7为本申请第二个实施方式中电子膨胀阀省略部分结构后的立体拆解 示意图。
图8为本申请第三个实施方式中电子膨胀阀省略部分结构后的立体拆解示意图。
具体实施方式
为使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及具体实施方式，对本申请进行进一步的详细说明。应当理解的是，此处所描述的具体实施方式仅用以解释本申请，并不限定本申请的保护范围。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。
请参阅图1至图2，图1为本申请一个实施方式中电子膨胀阀100的剖视示意图，图2为图1所示电子膨胀阀100在另一视角下的剖视示意图。
本申请提供一种电子膨胀阀100，本申请提供的电子膨胀阀100用以调节流体介质的流量及压力。
本实施方式中，电子膨胀阀100应用于空调系统中，流经电子膨胀阀100的流体介质为空调系统中用以进行冷热交换的冷媒。电子膨胀阀100在空调系统中是作为高压侧与低压侧的分界元件，电子膨胀阀100将高压液态冷媒节流降压，从而调节和控制进入蒸发器中的液态冷媒的剂量，进而使得液态冷媒的剂量能够适应外界制冷负载的要求。
可以理解，在其他的实施方式中，电子膨胀阀100还可以应用至冰箱等除空调系统之外的其他制冷系统中。
电子膨胀阀100包括阀体10、阀针组件20、丝杆组件30、套管40、转子组件50、导向套60以及定子组件(图未示)。阀针组件20、丝杆组件30、导向套60均安装于阀体10上；阀针组件20穿设于导向套60并连接于丝杆组件30的一端；丝杆组件30相对远离阀针组件20的一端连接于转子组件50；套管40安装于导向套60上；定子组件作用于转子组件50并能够在通电状态下驱动转子组件50转动。套管40与阀体10大致围设形成腔体，阀针组件20、丝杆组件30、转子组件50及导向套60均容置于该腔体内；定子组件设置在套管40的外部。
阀体10用以承载阀针组件20、丝杆组件30及导向套60；阀针组件20用以控制电子膨胀阀100的开启或关闭；丝杆组件30用以带动阀针组件20运动；套管40用以将外部环境与丝杆组件30及转子组件50隔离，从而保护丝杆组件30及转子组件50并避免介质泄露；转子组件50用以带动丝杆组件30运动；导向套60用于导向阀针组件20的往复滑动；定子组件用以驱动转子组件50旋转。
定子组件通电产生磁场并通过磁场力的作用驱动转子组件50转动，转子组件50带动丝杆组件30运动，阀针组件20在丝杆组件30的带动下往复滑动从而控制电子膨胀阀100开启或者关闭，从而完成电子膨胀阀100调节流体介质流量和压力调节的过程。
具体地，阀体10的内部中空并形成阀腔11，阀体10上固定设置有阀座12，阀座12上开设有阀口13，阀口13与阀腔11相互连通。
阀体10的两侧分别连接有介质进管101及介质出管102，流体介质通过介质进管101进入电子膨胀阀100的内部，再经过阀口13和介质出管102流出电子膨胀阀100。阀口13供阀针组件20伸入，从而阻断或者允许电子膨胀阀 100内的流体介质通过阀口13向外排出。
当阀针组件20封闭阀口13时，电子膨胀阀100关闭，介质进管101与介质出管102之间相互隔离；当阀针组件20解除对阀口13的密封时，电子膨胀阀100打开，介质进管101与介质出管102之间相互连通。
丝杆组件30包括丝杆31及套设在丝杆31上的螺母套32。丝杆31的一端连接于转子组件50，丝杆31的另一端连接于阀针组件20。螺母套32固定连接于导向套60并与丝杆31之间形成螺纹配合。
当转子组件50在定子组件的磁场力作用下转动时，与转子组件50相连接的丝杆31会跟随转子组件50同步转动；由于螺母套32的固定设置以及螺母套32与丝杆31之间的螺纹配合，丝杆31自身的转动会使得丝杆31不断旋入或者旋出螺母套32，从而使得丝杆31能够在自身的轴向上往复滑动。
套管40连接于导向套60，套管40与导向套60之间形成管腔41，管腔41用于容置转子组件50，并提供转子组件50以及丝杆31的运动空间。套管40将电子膨胀阀100的运动元件(转子组件50以及丝杆31)与外部环境相隔离，能够避免人员误触处于工作状态的这些运动元件，提高电子膨胀阀100的使用安全性能。
转子组件50包括转子51以及固定连接于转子51的连接座52。转子51由磁性材料制成，其能够在定子组件的磁力驱动作用下转动。连接座52上开设有第一通孔53，第一通孔53供丝杆31伸出从而实现连接座52与丝杆31之间的套设关系，以保证连接座52与丝杆31之间的精确定位，避免丝杆31歪斜。
在定子组件通电后，具体磁性的转子51在定子组件提供的磁场力矩的作用下转动，并通过连接座52带动丝杆31同步转动；丝杆31与螺母套32之间的螺纹配合将丝杆31的旋转运动转化为丝杆31在轴向上的伸缩运动，从而带动与丝杆31相连接的阀针组件20在轴向上位移，达到密封阀口13或者解除对阀口13密封的目的，进而控制电子膨胀阀100开启或关闭。
导向套60套设阀针组件20，其用于引导阀针组件20在电子膨胀阀100的轴线方向上运动，以保证阀针组件20能够顺利对准和嵌入阀口13内。
本实施方式中，导向套60承载套管40，套管40通过导向套60连接于阀体10从而实现套管40与阀体10之间的定位和准直。可以理解，在其他的实施方式中，套管40也可以直接连接于阀体10，此时套管40通过与阀体10之间的直接接触实现在阀体10上的定位和准直。
在传统的电子膨胀阀中，丝杆与连接座之间一般直接焊接在一起。在后续的维护过程中或者在大批量生产时，一旦需要解除丝杆与连接座之间的焊接状态，就会破坏丝杆或者连接座，操作不当时甚至会将两者一同破坏。
由于需要保证在高速转动下与螺母套之间螺纹配合性能，丝杆的结构非常精密，这导致丝杆的造价相对高昂。同时连接座为了保证与转子组件之间的固定连接性能，一般会采用粉末冶金工艺生产，连接座的造价也同样高昂。因此丝杆或者连接座的破坏会导致整个电子膨胀阀的维护成本和成产成本高昂，不利于电子膨胀阀推广和应用。
请一并参阅图3至图5，图3为图1所示电子膨胀阀100省略部分结构后的结构示意图，图4为图3所示电子膨胀阀100的拆解示意图，图5为图3所述电子膨胀阀100中连接座52的结构示意图。
本申请提供的电子膨胀阀100，通过设置与丝杆31固定连接的固定帽70，利用固定帽70承受连接座52与丝杆31之间的固定连接关系。由于固定帽70体型较小，材料损耗较少，造价十分低廉，因此电子膨胀阀100在批量生产而出现不合格产品时，就可以通过拆除丝杆31与固定帽70的配合，利用破坏固定帽70来回收具有高价值的丝杆31以及连接于丝杆31的转子组件50，这有利于降低维护和生产上的成本。
具体地，丝杆31包括第一端311以及第二端312，第一端311与第二端312之间相背离设置；丝杆31的第一端311通过第一通孔53从连接座52以及 转子组件50所围设形成的腔体内部伸出，丝杆31的第二端312连接于阀针组件20。
固定帽70固定连接于丝杆31的第一端311，并与连接座52之间形成止转连接。
转子51在定子组件磁场力的作用下发生转动时，转子51的回转运动首先传递至与转子51固定连接的连接座52上，并通过连接座52与固定帽70之间的止转连接将回转运动传递至固定帽70上，最后通过固定帽70与丝杆31之间的固定连接将回转运动传递至丝杆31上，从而完成转子组件50带动丝杆31回转的运动传递过程。
需要说明的是，固定帽70与丝杆31的第一端311之间的固定连接，既可以采用焊接的形式，也可以采用胶固、铆接等除焊接之外的其他固定连接方式；固定帽70与连接座52之间的止转连接，既可以通过在连接座52上设置能够卡设固定帽70的挡板来实现，也可以通过固定帽70与连接座52之间在套设时的异形配合来实现，还可以通过固定帽70与连接座52之间的焊接、铆接、螺接、键连接以及胶固等方式来实现。
本申请并不限制固定帽70与丝杆31的第一端311之间固定连接的具体形式，也不固定帽70与连接座52之间实现止转连接的具体结构，只要固定帽70与第一端311之间相互固定，并且连接座52能够将转子组件50提供的回转运动传递至固定帽70处即可。
固定帽70作为居中部件分别连接丝杆31与连接座52，这避免了丝杆31与连接座52之间的直接焊接，释放了连接座52与丝杆31之间的固定配合关系。电子膨胀阀100在需要维护，或者在大批量生产时因为质量问题而需要拆解回收时，只需要对加工难度低、成本低廉的固定帽70进行破坏，即可回收造价高昂的丝杆31以及连接座52。这能够降低电子膨胀阀100的生产维护成本和提升产品的性价比，增强产品在市场上的竞争力。
在本申请的一个实施方式中，固定帽70与丝杆31的第一端311之间焊接固定。此时固定帽70与丝杆31的第一端311具有较佳的连接可靠性，整个电子膨胀阀100的工作寿命较久。
当然，固定帽70与丝杆31的第一端311之间也可以铆接固定。固定帽70与丝杆31的第一端311之间的铆接固定，可以避免固定帽70与丝杆31之间的直接焊接。
由于行业内连接座52常采用不锈钢材料通过粉末冶金工艺制备而成，此时的连接座52在焊接时受到高温影响极容易氧化变黑，这导致一些漏焊的位置很容易被黑色的氧化层覆盖，造成操作人员在根据自身经验视检焊缝质量时的难度提升。而固定帽70与丝杆31的第一端311之间采用铆接固定，能够避免漏焊的发生，有助于提高电子膨胀阀100的产品质量。
请一并参阅图6，图6为图1所示电子膨胀阀100在A处的放大示意图。丝杆31的外侧面上凸设有第一凸起313(也即第一凸起313的外径大于丝杆31的外径)，第一凸起313抵持连接座52的一侧，固定帽70抵持连接座52的另一个侧面；第一凸起313与固定帽70相互配合并且抵持连接座52的两侧，从而将丝杆31轴向限位于连接座52上。
需要说明的是，第一凸起313与固定帽70相互配合并将丝杆31“轴向限位”于连接座52上，是指丝杆31的两端分别被第一凸起313以及固定帽70限位，这使得丝杆31与连接座52之间在丝杆31的轴向上不存在滑移，丝杆31并不能沿第一通孔53滑动。
丝杆31在连接座52上的轴向限位，使得丝杆31无论是沿远离阀针组件20的方向滑移，还是沿靠近阀针组件20的方向滑移，都可以稳定地连接于连接座52。这能够确保丝杆31的运动精确性，进而保证整个电子膨胀阀100的开阀性能；同时丝杆31的轴向限位也提升了丝杆31跟随连接座52同步转动时的运动稳定性，有助于保障整个电子膨胀阀100的顺利运行。以丝杆31上的第一凸 起313直接抵持连接座52来实现轴向限位，在安装上也更为便利。
当然，在不考虑运动稳定性与精确性的工况环境下，电子膨胀阀100也采用其他的方式实现连接座52与丝杆31之间的轴向限位，例如在丝杆31与连接座52之间直接胶固，丝杆31与连接座52之间过盈配合等方式来实现轴向限位。
本实施方式中，第一凸起313为圆环状。可以理解，第一凸起313还可以采用棱台状等除圆环状之外的其他形状。
需要说明的是，第一凸起313以及固定帽70对连接座52的抵持，既可以采用直接抵持的形式，也即第一凸起313及固定帽70与连接座52直接接触；也可以采用间接抵持的形式，也即第一凸起313及固定帽70通过中间过渡元件实现对连接座52的抵持。
在本实施方式中，第一凸起313直接抵持连接座52，固定帽70间接抵持连接座52。
在本申请的一个实施方式中，固定帽70包括第一套设部71、第二套设部73以及设置于第一套设部71与第二套设部73之间的抵接部72；抵接部72的一端连接于第一套设部71，另一端连接于第二套设部73。第一套设部71与第二套设部73大致沿丝杆31的轴向延伸，抵接部72大致沿丝杆31的径向延伸，第一套设部71、抵接部72以及第二套设部73形成阶梯状分布。
连接座52在相对远离阀针组件20的一侧(也即相对靠近固定帽70的一侧)凸设有第二凸起54，第一通孔53同时贯穿连接座52以及第二凸起54，第二凸起54与连接座52均通过第一通孔53套设丝杆31。
本实施方式中，第二凸起54与连接座52之间一体成型。可以理解，在其他的实施方式中，第二凸起54与连接座52之间还可以采用分体结构；此时第二凸起54与连接座52之间可以通过焊接、铆接、胶固等方式相互固定。
第二凸起54上具有大致沿丝杆31的径向延伸的端面541以及大致沿丝 杆31的轴向延伸的外侧面542。固定帽70上的第一套设部71套设丝杆31的第一端311，抵接部82抵持第二凸起54的端面541，第二套设部73套设第二凸起54的外侧面542。
固定帽70采用套设的方式可以在保证自身在丝杆31以及第二凸起54上定位准确性的同时，兼顾安装的便捷性，同时也能够提升与丝杆31以及连接座50的连接稳定性；并且在需要破坏固定帽70的场合下，固定帽70可以通过自身在丝杆31上的套设关系快速从丝杆31上分离开，这同样提升了拆装时的便捷性。
可以理解，在其他的实施方式中，固定帽70也可以采用卡接等方式来保持自身与丝杆31以及第二凸起54之间的相互定位；此时固定帽70卡接在丝杆31或者第二凸起54上，再分别通过安装工艺实现与丝杆31之间的固定连接以及与第二凸起54的止转连接。
在本申请的一个实施方式中，第二凸起54呈异形，也即第二凸起54的外侧面542采用非圆柱面的形状；对应地，固定帽70的第二套设部73的内腔也为异形腔，也即第二套设部73的内部围设为非圆柱面的形状。固定帽70通过第二套设部73套设第二凸起54的外侧面542，并通过第二套设部73与第二凸起54之间的异形配合形成止转连接。
本实施方式中，第二凸起54呈四棱柱状，第二凸起54的外侧面542为四棱柱的外侧面(包括四个相接的矩形面)；固定帽70的第二套设部73的内部围设为四棱柱的外侧面形状。
可以理解，在其他的实施方式中，第二凸起54与第二套设部73还可以采用三棱柱、五棱柱、椭圆柱、半圆柱等除四棱柱之外的其他形状，只要第二凸起54与第二套设部73之间能够相互配合并形成止转连接即可。
如此设置，电子膨胀阀100无需额外设置挡板等额外的部件，仅依靠第二凸起54与第二套设部83之间的形状配合即可直接形成止转连接。第二凸起 54与第二套设部73之间的异形配合提高了电子膨胀阀100的结构紧凑性和运行稳定性。
在本申请的一个实施方式中，电子膨胀阀100还包括止动件80，连接座52上开设有对应于止动件80的第二通孔55，止动件80通过第二通孔55从转子组件50与连接座52所围设形成的腔体内伸出，并连接于连接座52。
止动件80用于止挡丝杆组件30，从而对连接于丝杆31的转子组件50的极限位置进行限定。丝杆组件30还包括止挡圈33，止挡圈33呈螺旋状并绕设在螺母套32的外侧。
止挡圈33与止动件80相互配合，止挡圈33限定了转子组件50以及丝杆31在上下两端的极限位置。
止档圈33的大部分呈螺旋线形状，止档圈33相对远离固定帽70的一端固定连接于导向套60并且延伸到止档圈33螺旋线轨迹的外部；当止动件80运动至自身的下限位置时，止动件80接触止档圈33相对远离固定帽70的端部并且因为运动干涉而停止自身的运动。此时与止动件80相连接的转子组件50同步停止运动，从而实现止档圈33对转子组件50下限位置的限制。
止档圈33相对靠近固定帽70的一端同样延伸到止档圈33螺旋线轨迹的外部；当止动件80运动至自身的上限位置时，止动件80接触止档圈33相对靠近固定帽70的端部并且停止自身的运动。此时与止动件80相连接的转子组件50同步停止运动，从而实现止档圈33对转子组件50上限位置的限制。
止动件80包括杆体81以及连接于杆体81上的套环82，杆体81相对远离固定帽70的一端容置于转子组件50与连接座52所围设形成的腔体内，另一端通过第二通孔55伸出转子组件50与连接座52所围设形成的腔体。杆体81能够与止档圈33的两个端部配合从而限位转子组件50的上限位置与下限位置。
杆体81伸出连接座52的一端形成上述的套环82，套环82套设第二凸起54的外侧面542并且设置于连接座52与固定帽70之间；固定帽70抵持套环 82，并通过套环72作用于连接座52，从而将套环82压紧至连接座52上。
此时套环82在固定帽70的压紧作用下能够紧贴连接座52，能够避免套环82与连接座52之间的分离，进而提高电子膨胀阀100的运行稳定性。
进一步地，套环82的内壁呈异形，也即套环82的内壁为非圆环面，套环82同时与固定帽70以及第二凸起54的外侧面542之间通过异形配合形成止转连接。
套环82与第二凸起54之间以异形配合形成止转连接，使得套环82无需通过焊接、铆接等额外工艺即可实现与连接座52的稳固连接，杆体81在受到止挡圈33的止挡时能通过套环82与第二凸起54之间的止转连接将停止作用传递至连接座52、转子51以及丝杆31上。同时套环82直接套装至第二凸起54上，在安装便捷性上有极大的提升。
在本申请的一个实施方式中，套环82为封闭的环形；或者，套环82为开设有缺口的环形，此时套环82的横截面大致呈“C”形。
当套环82采用封闭环形时，套环82的加工成本较低，适合大批量生产。当套环82采用带有缺口的环形结构，套环82因为缺口的存在自身的可变形程度较高，能够匹配更大尺寸范围的第二凸起54，在安装上的便捷性进一步提升。
请一并参阅图7，图7为本申请第二个实施方式中电子膨胀阀100省略部分结构后的立体拆解示意图。
本申请第二个实施方式与本申请第一个实施方式中的所不同的是，第二凸起54a的外侧面542a向外延伸并形成台阶部56a，台阶部56a位于连接座52a与第二凸起54a之间。
此时止动件80a中的套环82a自第二通孔55a中伸出并套设第二凸起54a的外侧面，且套环82a的内壁面为圆环面，台阶部56a的外侧面为圆柱面，套环82a套设台阶部56a。此时套环82a与台阶部56a之间通过焊接、铆接、胶固等方式相互固定。
如此设置，套环82a能够较为容易的生产，电子膨胀阀100的生产成本较低。
请一并参阅图8，图8为本申请第三个实施方式中电子膨胀阀100省略部分结构后的立体拆解示意图。
本申请第三个实施方式与本申请第二个实施方式中的所不同的是，本申请中第三个实施方式中的第二通孔55b与杆体81b的形状相匹配，从而更好地限位杆体81b。
本申请提供的电子膨胀阀100，通过设置与丝杆31固定连接的固定帽70，利用固定帽70承受连接座52与丝杆31之间的固定连接关系。由于固定帽70体型较小，材料损耗较少，造价十分低廉，因此电子膨胀阀100在批量生产而出现不合格产品时，就可以通过拆除丝杆31与固定帽70的配合，利用破坏固定帽70来回收具有高价值的丝杆31以及连接于丝杆31的转子组件50，这有利于降低维护和生产上的成本。
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，未对上述实施例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。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (15)

  1. 一种电子膨胀阀(100)，包括：
    转子(51)；
    连接座(52)，所述连接座(52)固定连接于所述转子(51)；
    丝杆(31)，所述丝杆(31)的第一端(311)穿设并伸出所述连接座(52)；
    其特征在于，所述电子膨胀阀(100)还包括固定帽(70)，所述固定帽(70)固定连接于所述丝杆(31)的第一端(311)，且所述固定帽(70)与所述连接座(52)之间形成止转连接。
  2. 根据权利要求1所述的电子膨胀阀(100)，其特征在于，所述固定帽(70)与所述丝杆(31)的第一端(311)之间焊接固定；或者，
    所述固定帽(70)与所述丝杆(31)的第一端(311)之间铆接固定。
  3. 根据权利要求1所述的电子膨胀阀(100)，其特征在于，所述丝杆(31)的外侧面上凸设有第一凸起(313)，所述第一凸起(313)与所述固定帽(70)分别抵持所述连接座(52)的两侧，并将所述丝杆(31)轴向限位于所述连接座(52)上。
  4. 根据权利要求1所述的电子膨胀阀(100)，其特征在于，所述连接座(52)在相对靠近所述固定帽(70)的一侧凸设有第二凸起(54)，所述第二凸起(54)套设所述丝杆(31)；所述固定帽(70)包括相互之间呈阶梯状分布的第一套设部(71)、抵接部(72)以及第二套设部(73)，所述第一套设部(71)套设所述丝杆(31)的第一端(311)，所述抵接部(72)抵持于所述第二凸起(54)的端面(541)，所述第二套设部(73)套设所述第二凸起(54)的外侧面(542)。
  5. 根据权利要求4所述的电子膨胀阀(100)，其特征在于，所述第二凸起(54)呈异形，所述第二套设部(73)的内腔为异形腔，所述第二套设部(73)与所述第二凸起(54)之间通过异形配合形成止转连接。
  6. 根据权利要求5所述的电子膨胀阀(100)，其特征在于，所述电子膨胀阀(100)还包括止动件(80)，所述止动件(80)伸出所述连接座(52)的一端形成套环(82)，所述套环(82)套设所述第二凸起(54)并设置于所述连接座(52)与所述固定帽(70)之间，所述固定帽(70)抵持于所述套环(82)。
  7. 根据权利要求6所述的电子膨胀阀(100)，其特征在于，所述套环(82)的内壁呈异形，所述套环(82)的内壁与所述第二凸起(54)的外侧面之间通过异形配合形成止转连接。
  8. 根据权利要求5所述的电子膨胀阀(100)，其特征在于，所述电子膨胀阀(100)还包括止动件(80a)，所述止动件(80a)伸出所述连接座(52a)的一端形成套环(82a)；所述第二凸起(54a)的外侧面向外延伸并形成台阶部(56a)，所述台阶部(56a)的外侧面为圆柱面，所述套环(82a)的内侧面为圆环面，所述套环(82a)套设所述台阶部(56a)，且所述套环(82)与所述台阶部(56a)之间固定连接。
  9. 根据权利要求6或8所述的电子膨胀阀(100)，其特征在于，所述套环(82,82a)为封闭的环形；或者，
    所述套环(82,82a)上开设有缺口。
  10. 根据权利要求1所述的电子膨胀阀(100)，其特征在于，所述电子膨胀阀(100)还包括阀体(10)及螺母套(32)，所述螺母套(32)固定连接于所述阀体(10)并与所述丝杆(31)之间形成螺纹配合。
  11. 根据权利要求10所述的电子膨胀阀(100)，其特征在于，所述电子膨胀阀(100)还包括阀针组件(20)，所述丝杆(31)还包括与所述第一端(311)相背离设置的第二端(312)，所述丝杆(31)的第二端(312)连接于所述阀针组件(20)并能够带动所述阀针组件(20)往复移动。
  12. 根据权利要求11所述的电子膨胀阀(100)，其特征在于，所述电子膨胀 阀(100)还包括导向套(60)，所述导向套(60)固定连接于所述阀体(10)并套设所述阀针组件(20)。
  13. 根据权利要求12所述的电子膨胀阀(100)，其特征在于，所述电子膨胀阀(100)还包括套管(40)，所述套管(40)连接于所述导向套(60)并与所述导向套(60)之间形成管腔(41)，所述转子(51)、连接座(52)及固定帽(70)均收容于所述管腔(41)内。
  14. 根据权利要求12所述的电子膨胀阀(100)，其特征在于，所述电子膨胀阀(100)还包括止挡圈(33)，所述止挡圈(33)绕设所述螺母套(32)且固定连接于所述导向套(60)。
  15. 根据权利要求11所述的电子膨胀阀(100)，其特征在于，所述电子膨胀阀(100)还包括阀座(12)，所述阀座(12)上开设有阀口(13)并固定连接于所述阀体(10)；所述阀针组件(20)能够在所述丝杆(31)的带动下往复移动，并控制所述阀口(13)的开闭。
PCT/CN2019/111073 2018-10-22 2019-10-14 电子膨胀阀 Ceased WO2020083065A1 (zh)

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