WO2019179517A1 - Electronic expansion valve - Google Patents

Electronic expansion valve Download PDF

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Publication number
WO2019179517A1
WO2019179517A1 PCT/CN2019/079229 CN2019079229W WO2019179517A1 WO 2019179517 A1 WO2019179517 A1 WO 2019179517A1 CN 2019079229 W CN2019079229 W CN 2019079229W WO 2019179517 A1 WO2019179517 A1 WO 2019179517A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
electronic expansion
core
stem
port
Prior art date
Application number
PCT/CN2019/079229
Other languages
French (fr)
Chinese (zh)
Inventor
王宇栋
Original Assignee
浙江三花智能控制股份有限公司
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
Application filed by 浙江三花智能控制股份有限公司 filed Critical 浙江三花智能控制股份有限公司
Priority to JP2020549656A priority Critical patent/JP7018519B2/en
Publication of WO2019179517A1 publication Critical patent/WO2019179517A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/38Expansion means; Dispositions thereof specially adapted for reversible cycles, e.g. bidirectional expansion restrictors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift 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
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/36Valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644One-way valve
    • F16K31/0655Lift valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/50Mechanical actuating means with screw-spindle or internally threaded actuating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/50Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F16K31/508Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention relates to the technical field of refrigeration control, and particularly relates to an electronic expansion valve for regulating the flow rate of a refrigerant.
  • the electronic expansion valve is a refrigerant flow control component of a refrigeration and heating device, and is mainly composed of two parts, one part is a valve body part for flow adjustment, and the other part is a coil part for driving.
  • Figure 1 is an electronic expansion valve with a small flow adjustment function in the background art.
  • the coil part comprises: a permanent magnet type stepping motor 1', a spur gear reduction device 2' having a three-stage deceleration, a thread sub-structure 4' for converting a rotary motion of the motor into a vertical movement of the screw rod, and a thread sub-structure 4' is formed
  • the threaded portion 5', the screw rod 3', the valve body portion includes a valve body 8, a large valve port 10', the inner cavity of the valve body 8 accommodates a bellows 6', and the bellows 6' is fixedly connected with a valve stem 7'.
  • the valve stem 7' drives the valve needle portion 9' to perform an axial lifting movement in the inner cavity of the valve body 8 to approach or away from the large valve port 10' to regulate the flow rate of the refrigerant flowing through the large valve port 10'.
  • the valve needle portion 9' There is also a small valve port 91', the valve stem 7' can be moved up and down under the action of the bellows 6' to open or close the small valve port 91', and the valve stem 7' is fixedly connected with a blocking piece 92'.
  • the principle of motion briefly describes the mode of operation of the product: the stepping motor 1' of the electronic expansion valve controlled by the electronic controller of the air conditioning system drives the reduction gear 2', and the screw 3' is acted upon by the threaded rod 3' and the threaded portion 5' Moving downward, the valve stem 7' is also moved downward by the action of the steel ball and the bushing of the force transmitting member.
  • the tube 6' is continuously subjected to stretching, and the needle portion 9' is gradually approached to the large valve port 10'; when a reverse pulse is applied, the elastic force of the bellows 6' is restored, and the valve stem 7' is continuously moved upward, the valve stem 7' gradually moves away from the small valve port 91', and the small valve port 91' is opened.
  • the valve needle portion 9' is integrally moved away from the large valve port 10'.
  • the directional movement, the structure of the scheme is relatively complicated, the presence of the reduction gear device requires the coil component to provide a larger driving force for the opening and closing valve, and the bellows 6' is often required in the process of adjusting the flow rate of the electronic expansion valve.
  • the resilience effect can be turned on, but with the long-term use of the product, the bellows 6' is prone to aging and other phenomena, and the opening and closing valve cannot be smoothly realized.
  • a design is designed.
  • the product structure is relatively simple, and the small driving force can also realize the adjustment of the size and flow of the electronic expansion valve, which is a technical problem to be solved by those skilled in the art.
  • the main object of the present invention is to provide an electronic expansion valve, which has a simple product structure and can realize the flow adjustment of the electronic expansion valve under the action of a small driving force.
  • an electronic expansion valve comprising:
  • valve body a valve body and a valve seat
  • the valve body has a valve cavity
  • valve seat is provided with a first valve port
  • the rotor assembly the rotor assembly comprises a rotor and a screw rod, and the rotor is fixedly connected directly or indirectly to the screw rod, and the screw rod has an external thread portion;
  • the support frame is fixedly connected with the valve body, the support frame comprises a matching groove and a first mounting hole, the first mounting hole is matched with the screw rod; the nut and the nut comprise a fitting portion and an internal thread portion that is threadedly engaged with the external thread portion, The mating portion can be axially moved up and down along the matching groove; the core assembly and the core assembly are fixedly connected with the nut, and the core assembly can perform axial lifting movement in the valve cavity by the screwing action of the external thread portion and the internal thread portion.
  • the core assembly comprises a connecting seat and a valve core, the connecting seat is fixedly connected with the valve stem, the valve core has a valve core head, the valve core head can be close to or away from the first valve port, the valve core is further provided with a second valve port, and the valve stem can Approach or stay away from the second valve port.
  • the electronic expansion valve provided by the present application has a core assembly and a nut fixedly connected, and the core assembly can perform axial lifting movement in the valve cavity by the threaded action of the screw rod and the nut, thereby eliminating the complicated reduction gear device and the corrugation.
  • the tube structure greatly reduces the driving force required for the coil component.
  • the core assembly includes a valve core and a connecting seat, so that the connecting seat and the valve stem are fixedly connected, and the valve core Being able to approach or move away from the first valve port, the valve stem can be approached or away from the second valve port, and the core assembly can perform axial lifting movement in the valve cavity according to the thread transmission of the screw rod and the nut to realize the electronic expansion valve
  • the size and flow rate adjustment, the overall product structure is relatively simple, and the size and flow adjustment of the electronic expansion valve can also be realized under the action of small driving force.
  • FIG. 1 is a cross-sectional view showing the overall structure of a two-stage electronic expansion valve in the background art
  • FIG. 2 is a cross-sectional view showing the entire structure of an electronic expansion valve according to a first embodiment of the present invention
  • Figure 3 is a cross-sectional view showing the entire structure of the core assembly of the electronic expansion valve of Figure 2;
  • Figure 4 is a perspective view showing the structure of the support frame of the electronic expansion valve of Figure 2;
  • Figure 5 is a perspective view showing the nut structure of the electronic expansion valve of Figure 2;
  • Figure 6 is a schematic structural view of the connecting seat of the electronic expansion valve of Figure 2;
  • Figure 7 is a cross-sectional view showing the entire structure of a valve body of an electronic expansion valve according to the present invention.
  • Figure 8 is a cross-sectional view showing the overall structure of an electronic expansion valve having another core assembly structure according to the present invention.
  • Figure 9 is a cross-sectional view showing the entire structure of an electronic expansion valve according to a second embodiment of the present invention.
  • FIG. 10 is a schematic overall structural view of an electronic expansion valve according to a third embodiment of the present invention.
  • 11-a and 11-b are schematic diagrams showing the relationship between the first flow path S1 and the second flow path S2 of the electronic expansion valve provided by the present invention.
  • valve 2 is an electronic expansion valve according to a first embodiment of the present invention, comprising a valve body 10 and a valve seat 20, the valve body 10 is formed with a valve chamber 102, and the valve seat 20 and the valve body 10 can be a separate structure.
  • the first valve port 101 is opened on the valve seat 10 by the welding.
  • the valve seat 20 and the valve body 10 can also be an integral structure.
  • the side wall of the valve body 10 is provided with a first connecting port, and the first connecting port is welded and fixed.
  • the first connecting connector 100 has a second connecting port at the lower end of the valve seat 20, and the second connecting port is welded and fixed with the second connecting connector 200.
  • the first connecting connector 100 and the second connecting connector 200 pass through the first valve port 101.
  • the refrigerant may flow from the first connecting nozzle 100 and then pass through the first valve port 101 and then flow out from the second connecting nozzle 200 or the refrigerant may also enter from the second connecting nozzle 200 and pass through the first valve port 101 and then be connected by the first connection.
  • the nozzle 100 flows out, and the refrigerant flow direction of the electronic expansion valve can be bidirectionally circulated.
  • a valve body projecting portion 103 is provided at an upper end portion of the valve body 10.
  • the outer peripheral wall of the valve body projecting portion 103 is welded and fixed to the outer casing portion 30.
  • the outer casing portion 30 has a cylindrical structure in which the upper end portion is a closed port, and the outer casing portion 30 and the valve are provided.
  • the body 10 together constitutes an inner cavity of the electronic expansion valve, the inner cavity of the electronic expansion valve is roughly divided into upper and lower cavities, the lower cavity forms the valve cavity 102, the upper cavity forms a rotor cavity, and the outer peripheral portion of the outer casing portion 30 is sleeved.
  • the coil component, the rotor cavity of the electronic expansion valve, houses a rotor assembly 40 including a rotor component 41, a mount 42, a rotating shaft 43, and a lead screw 44.
  • the mount 42 does not interfere with the rotor component 41 as a separate component.
  • the fixing base 42 is provided with a guiding hole.
  • One end of the rotating shaft 43 is matched with the guiding portion, and the other end is matched with the screw mounting hole of the screw rod 44.
  • the rotor member 41 has a substantially H-shaped structure as a whole, and the rotor member 41 is provided with one.
  • the rotor protrusion 411, the screw rod 44 is provided with a screw step portion 441 and a screw groove portion 442.
  • the screw groove portion 442 is mated with the rotor protrusion 411, and the rotor member 41 and the screw rod 44 are integrally molded. Molded structure, electronic expansion valve actuation The rotation of the rotor member 41 is driven by the exciting action of the coil driving member. Since the rotor member 41 and the screw 44 are fixed as a single integral member, the screw 44 rotates with the rotor member 41, and is passed through the external thread portion 44a of the screw 44.
  • the threaded engagement of the internal thread portion 74a of the nut 70 causes the core assembly 60 to perform an axial lifting movement within the valve chamber 102, and the upper end portion of the rotating shaft 43 and the fixing seat 42 is abutted against the end closing opening of the outer casing portion 30 to The axial movement of the lead screw 44 is limited.
  • the electronic expansion valve shown in FIG. 4 includes a support frame 50.
  • the support frame 50 has a generally large cap-like structure, including an upper support frame 51 and a lower support frame 52.
  • the upper support frame 51 is provided with a first installation.
  • the hole 54 cooperates with the screw 44 for the threaded rod 44 to pass therethrough, and the end table of the upper support frame 51 cooperates with the screw step 441 of the screw 44 to limit the axial downward movement of the screw 44.
  • the screw rod is rotated only in the circumferential direction and cannot be lifted and moved in the axial direction.
  • the lower support frame 52 defines at least one fitting groove 53 for engaging with the nut 70, and passes through the outer peripheral wall of the lower support frame 52 and the valve body protrusion portion.
  • the inner peripheral wall of the 103 is welded and fixed to integrally fix the support frame 50 to the valve body 10.
  • the support frame 50 plays a role in limiting the axial movement of the screw 44 and the circumferential movement of the nut 70, and reduces the screw 44. Stabilize to prevent pulse or flow deviation due to crosstalk.
  • the support frame 50 defined herein is only for the shape description in the embodiment provided by the present invention, as long as it can limit the axial movement of the screw 44 and the circumferential movement of the nut 70, it should be pointed out Other shape changes, such as cup shapes, may also be included, and should be covered by the scope of the present invention.
  • the electronic expansion valve provided by the present invention further includes a core assembly 60 including a connector block 61 including a body 611 and a guide portion 612.
  • the body 611 is formed with a body cavity 6111 and has a body end surface 611a.
  • the body end surface 611a is formed with a card slot 611b.
  • the guiding portion 612 is formed with a guiding inner cavity 6121.
  • the nut 70 includes The nut body 71, the connecting piece 72 and the at least one engaging portion 73, the connecting piece 72 may be made of a metal material, the nut body 71 may be made of a plastic material, and the connecting piece 72 may be integrally formed by injection molding with the nut body 71 or the connecting piece 72 may be selected.
  • the nut body 71 is fixedly connected by a metal material by welding. The material of the nut is not specifically limited.
  • the connecting piece 72 has a connecting piece lower end surface 72a, and the engaging portion 73 is a convex portion extending outward from the nut body 71.
  • the engaging portion 73 can be engaged with the engaging groove 53 to prevent the circumferential rotation of the nut 70 and the core assembly 60.
  • the nut body 71 is integrally press-fitted into the body cavity 6111, and the nut 70 and the core assembly 60 are fixedly connected. Specifically, the lower end surface 72a of the connecting piece 72 of the nut 70 is welded and fixed to the main body end surface 611a of the connecting seat 61. The nut 70 is integrally fixed to the core assembly 60, and the engaging portion 73 is also abutted against the engaging groove 611b.
  • a nut mounting hole 74 is provided for the screw rod 44 to pass therethrough, and the rotation of the rotor 41 is driven by the excitation of the coil, and the screw rod 44 rotates together with the rotor 41, since the screw rod 44 always maintains the rotation in the circumferential direction, the rotor 41
  • the screw 44 is fixedly coupled to the screw 44, and the rotor 41 is also rotated in the circumferential direction like the screw 44. Therefore, the rotor 41 can fully exert its magnetic action, and is threaded by the external thread portion 44a of the screw 44 and the female screw portion 74a of the nut 70.
  • the rotation of the screw 44 is gradually converted into the axial lifting movement of the core assembly 60 in the valve chamber 102, and the nut 70 and the core assembly 60 are axially moved up and down in the valve chamber 102, and the driving mode is electronic expansion.
  • the valve direct-acting drive mode eliminates the complicated reduction gear device and bellows structure, greatly reduces the output force requirement of the coil, and can realize the miniaturization of the coil, enabling the electronic even for a small driving force.
  • Flow regulating expansion valve size object In order to achieve a more reliable manner of operation, one or two engaging portions 73 may be provided.
  • the matching groove 53 and the latching groove 611b are also provided as one or two corresponding to the engaging portion 73.
  • the engaging portion 73 may also be set to 3 More than one, it should be noted that the nut 70 and the core assembly 60 are fixedly connected, and the nut 70 and the core assembly 60 are only subjected to axial lifting movement and cannot perform axial rotational movement, and the screw 44 is transmitted to the nut 70 through the thread pair. The force is directly reflected in the axial lifting movement of the core assembly 60, effectively avoiding the pulse delay and reducing the valve pulse deviation, and the screw rod 44, the nut 70 and the core assembly 60 are always in a lightly pre-tightened state.
  • the core assembly 60 further includes a valve core 63 and a valve stem 64.
  • the connecting seat 61 is fixedly connected to the valve stem 64.
  • the connecting seat 61 is provided with a mounting hole 611c.
  • the valve stem 64 is welded and fixed to the connecting seat 61 through the mounting hole 611c.
  • At least a portion of the body is axially movable along the guiding lumen 61121, and the spool 63 includes a valve plug head 631 that is capable of approaching or moving away from the first valve port 101 to regulate the flow of refrigerant through the first valve port 101.
  • the spool 63 together with the first valve port 101 constitutes a large flow regulating mechanism
  • the spool 63 is further provided with a second valve port 633
  • the valve stem 64 can approach or move away from the second valve port 633 to regulate the flow through the second valve port 633.
  • the refrigerant flow rate, the valve stem 64 and the second valve port 633 together constitute a small flow adjustment mechanism
  • the core assembly 60 of the electronic expansion valve further includes a sleeve 62, and the sleeve 62 as a whole has a tubular member with an opening at the lower end.
  • the sleeve 62 has an opening portion 621.
  • the lower end of the sleeve 62 is formed with an inwardly bent support portion 622.
  • the support portion 622 is formed with a support surface 622a.
  • the valve core 63 is suspended by the valve core protrusion portion 632 and the support portion 622.
  • the valve core boss 632 On the sleeve 62 to prevent the valve core 63 from coming off, the valve core boss 632 has a support surface 622.
  • valve core convex portion 632 and the step portion 6122 are further provided with a a spring member 400 for preventing the impact on the core assembly 60 when the refrigerant enters from the second connecting joint 200 when the valve is in the closed state, and ensuring that the spool 63 is in contact with the first valve port 101 In connection with the pressure of the refrigerant, the valve head 631 is prevented from coming off the first valve port 101.
  • the electronic expansion valve further includes a muffling device 90.
  • the body 611 is provided with a first circulation passage S1 for circulating refrigerant
  • the muffler device 90 includes a first muffler. 91, the first muffler 91 covers the first flow passage S1 to eliminate the eddy current generated by the flowing refrigerant, breaks the large bubble into small bubbles to reduce the refrigerant noise
  • the valve stem 64 is formed with the valve stem cavity 641 and the valve stem 64 A through hole is formed in the side wall, and the through hole forms a second flow passage S2 through which the refrigerant flows.
  • the valve stem 64 includes a head having a third flow passage S3 through which the refrigerant flows, and the muffler 90 further includes a second a muffling member 92, the second muffler 92 is received in the valve stem cavity 641 and covers the third flow passage S3.
  • the muffler 90 further includes a third muffler 93 and a fourth muffler 94.
  • the third muffler 93 is received in the valve.
  • the spool chamber 635 of the core 63, the fourth silencing member 94 is disposed on the outer peripheral portion of the valve stem 64 and covers the second flow passage S2.
  • the material of each of the silencing members may be a mesh-shaped or block-shaped sound-absorbing member or a superposition thereof.
  • the electronic expansion valve forms a fixed small flow rate adjustment state, that is, a fixed small flow rate adjustment mechanism in which the refrigerant flows through the third circulation passage S3 to form an electronic expansion valve, and the refrigerant passes from the first connection nozzle 100.
  • the vortex generated by the refrigerant is eliminated through the first sound absorbing member 91 through the valve chamber 102, and the large air bubble is gradually broken and then enters the first circulation passage S1, and is silenced by the fourth silencing member 94 and then enters the valve through the second circulation passage S2.
  • the rod cavity 641 is silenced by the second muffler 92, and then enters the valve core cavity 635 through the third flow passage S3 through the second valve port 633, and is silenced by the third muffler 93, and finally passes through the first valve port 101.
  • the refrigerant suppressing the flow of the refrigerant through the silencing device of the muffler device greatly reduces the flow sound of the refrigerant, further improving the comfort of the customer to use the product, and the need to explain is to achieve a better
  • the muffling effect as shown in FIGS. 11-a and 11-b, the first flow passage S1 and the second flow passage S2 may be alternately arranged to center the center line of the first flow passage S1 and the center of the second flow passage S2.
  • the line is vertically disposed, and two first flow passages S1 and two second flow passages S2 or only one first flow passage S1 and two second flow passages S2 are respectively disposed, and when the refrigerant enters the valve chamber 102, The stroke of the flow passage S1 to the second flow passage S2 is lengthened, so that the distance of the refrigerant passing through the effective silencing area is lengthened, thereby further enhancing the noise-damping effect, and the electronic expansion valve is prevented in order to prevent the medium from entering between the components.
  • a sealing member 80 is also provided to improve the sealing performance between the respective components of the electronic expansion valve, the sealing member 80 including a first sealing member 81 disposed at the outer peripheral portion of the fourth muffling member 94 and guided Between the inner peripheral walls of the portion 612, a second sealing member 82 is further included, and the second sealing member 82 is fitted into the groove portion 634 of the valve body 63.
  • the operation principle of the electronic expansion valve of this embodiment will be briefly described below, and the rotation of the rotor 41 is driven by the magnetic force of the coil.
  • the screw shaft 44 is abutted from the upper end portion of the rotating shaft 43 and the fixed seat 42 and the outer casing portion 30 and the support frame 50.
  • the limit action only performs circumferential rotation, and the screw drive nut 70 and the core assembly 60 are axially disposed in the valve chamber 102 by the screwing action of the external thread portion 44a of the screw 44 and the internal thread portion 74a of the nut 70.
  • the valve core boss 632 is supported on and abuts against the support surface 622a of the sleeve 62.
  • the nut 70 and the core assembly 60 are threaded.
  • the engaging portion 73 of the nut 70 can only perform the axial lifting movement by the limiting action of the support frame 50, the engaging portion 73 also moves downward along the engaging groove 53, and the valve head 631 of the spool 63 is gradually approached.
  • the first valve port 101 is in a large flow adjustment state.
  • the screw drive 44 drives the nut 70 and the core assembly 60 to continue downward movement.
  • the core convex surface 632a and the support surface 622a are originally The abutting state gradually falls off, and the valve stem 64 gradually approaches the second valve port 633.
  • This process is a small flow adjustment state until the maximum distance between the valve core convex surface 632a and the support surface 622a is released, the valve stem 64 and the first The two valve ports 633 abut against each other to realize the valve closing process; and in the valve closing state, the valve core boss portion 632 and the support surface 622a of the sleeve 62 are disengaged, and when it is required to close from the valve to the valve opening, the reverse is applied.
  • the excitation pulse drives the rotation of the rotor 41, the screw 44 rotates, and the threaded transmission nut 70 and the core assembly 60 of the screw rod 44 and the nut 70 move upward as a whole, and the engaging portion 73 also moves upward along the engagement groove 53.
  • the support surface 622a of the cylinder 62 gradually approaches the valve core convex surface 632a, and the valve stem 64 gradually opens the second valve port 633 to constitute a small flow adjustment state, in which the valve core 63 is maintained by the spring force of the first spring member 400.
  • the engagement between the valve plug head 631 and the first valve port 101 abuts.
  • the connecting seat 61 is fixedly connected to the valve stem 64 by optimizing the structure of the core assembly 60.
  • the screw 44 can be transmitted through the screw thread of the screw 44 and the nut 70.
  • the axial rotational motion is converted to drive the core assembly 60 to move axially upward in the valve chamber 102.
  • the connecting seat 61 drives the valve stem 64 away from the second valve port 633 to form a small flow adjustment state.
  • the valve core 63 of the electronic expansion valve cooperates with the first valve port 101 or the nut 44 and the screw 44 during the cooperation of the valve stem 64 and the second valve port 633.
  • the threading action that is, the direct-acting driving mode of the electronic expansion valve, can realize the adjustment of the flow rate of the refrigerant, eliminating the complicated gear reduction device and the bellows structure, and the overall structure of the product is simpler, and the output of the coil component is eliminated.
  • the force requirement is low, and the coil can be miniaturized, and the opening and closing valve can be smoothly realized even with a small driving force.
  • FIG. 8 is another schematic structural view of the core assembly of the electronic expansion valve provided by the present invention.
  • the core assembly 60 is The sleeve 62 and the first spring member 400 may be eliminated.
  • the core assembly 60 includes a joint 61 that is a unitary structure.
  • the joint 61 includes a body 611 and a guide portion 612'.
  • the lower end portion of the guide portion 612' has a guide.
  • the opening portion 621a' at least a portion of the valve body 63 extends into the valve chamber 102 through the guide opening portion 621a', and the lower end portion of the guide portion 612' further has a guide support portion 612b' bent inwardly, and the guide support portion 612b' is formed There is a guiding support surface 6121b', and the valve core protrusion 632 of the valve core 63 is suspended from the connecting seat 61 by the guiding support surface 6121b', and at least a part of the valve core 63 can be axially moved along the guiding inner cavity 6121'.
  • the guiding portion 612' also has an inner wall surface 612c'.
  • the inner wall surface 612c' can be relatively close to or away from the valve core projection 632, specifically when the valve head 631 and the first After a valve port 101 is abutted, it is excited, and the connecting seat 61 is followed by the valve stem 64. Continued downward movement gradually closes the second valve port 633.
  • the guiding support surface 6121b' gradually moves away from the valve core convex surface 632a, and the inner wall surface 612c' gradually approaches the valve core convex portion 632;
  • the valve stem 64 gradually moves away from the second valve port 633, and the connecting seat 61 moves upwardly together with the valve stem 64 such that the inner wall surface 612c' gradually moves away from the valve core projection 632, and the guiding support surface 6121b' gradually approaches the valve core convex surface.
  • the 632a drives the spool 63 to open the first valve port 101 after the abutment.
  • the distance between the guiding support surface 6121b' of the guiding portion 612' of the electronic expansion valve provided by the present invention and the valve core convex surface 632a of the valve core 63 or the supporting surface 622a of the sleeve 62 and the valve core projection constitutes the stroke of the small flow regulating mechanism of the valve stem 64 and the second valve port 633.
  • FIG. 9 is a schematic structural view of an electronic expansion valve according to a second embodiment of the present invention.
  • the electronic expansion valve is different from the electronic expansion valve of the first embodiment mainly in a rotor assembly structure and a core assembly structure.
  • the electronic expansion valve includes a rotor assembly 40'.
  • the rotor assembly 40' includes a rotor 41', a fixed seat 42' fixedly coupled to the rotor 41', and a screw 44'.
  • the rotor 41' is integrally molded with the fixed seat 42'.
  • the core assembly 60 includes a connecting seat 61 and a valve core 63.
  • the connecting base 61 includes a body 611 and a guiding portion 612.
  • the body 611 has a body cavity 6111.
  • the nut 70 is press-fitted into the body cavity 6111, and the body 611
  • the side wall is provided with a first flow passage S1 and the body 611 has a third valve port 611d.
  • the valve stem 64' is press-fitted into the guide inner cavity 6121.
  • the valve stem 64' has a head and a stem cavity 641', and the stem is formed with The third circulation passage S3, the outer peripheral portion of the first circulation passage S1 is covered with the first silencing member 91, the valve stem chamber 641' accommodates the second muffler 92, and the second muffler 92 is located at the second valve port 633' and the third Between the valve ports 611d, the second sound absorbing member 92 covers the third flow passage S3.
  • the remaining structural features and actuation modes have been described in detail in the first embodiment, and will not be further described herein.
  • FIG. 9 and FIG. 10 are a schematic structural view of an electronic expansion valve according to a second embodiment of the present invention and a schematic structural view of a connector.
  • the rotor assembly 40' of the electronic expansion valve includes a rotor 41' and is fixedly coupled to the rotor 41'.
  • the fixing seat 42' and the screw rod 44', the rotor 41' is integrally injection-molded with the fixing seat 42', the fixing seat 42' has a guiding portion and is provided with a fixing seat hole, and the fixing seat 42' is fixedly connected with the connecting rod 421, the connection
  • the rod 421 includes a horizontal portion and a longitudinal portion. The horizontal portion is welded and fixed to the guiding portion. The longitudinal portion extends axially into the rotor cavity through the fixing seat hole.
  • the nut 70' is integrally injection molded with the connecting piece 71' and the nut 70' passes through the connecting piece 71'.
  • the valve body 10 is fixedly mounted, and the outer peripheral portion of the nut 70 is sleeved with a spring rail 500.
  • the spring rail 500 includes a slip ring 501.
  • the slip ring 501 is wound by a steel wire and can be spirally moved along the spring rail 500.
  • the slip ring 501 is engaged to control the upper and lower dead points of the spiral movement of the slip ring 501.
  • the upper end portion of the spring guide 500 is provided with an upper stop portion. When the slip ring 501 moves upward to the upper stop point, the upper stop portion limits the slip ring 501.
  • the lower end portion of the 500 is provided with a lower stop portion.
  • the lower stop portion restricts the downward movement of the slip ring 501, and the spring guide 500, the slip ring 501 and the link 421 constitute an electronic expansion.
  • the locking mechanism of the valve cooperates with the slip ring 501 to control the movement stroke of the screw shaft 44 in the axial direction to drive the axial movement of the core assembly 60' in the axial direction of the valve chamber 102.
  • the screw rod 44' The nut mounting portion 74' has an externally threaded portion 44a' and the lead screw 44' extends substantially integrally into the nut 70'.
  • the nut 70' is provided with an internally threaded portion 74a' through the thread of the externally threaded portion 44a' and the internally threaded portion 74a'.
  • the screw The sleeve 700 has a first thrust surface 701, and the upper end portion of the connecting seat 61' is fixedly connected with a valve needle sleeve 600.
  • the valve needle sleeve 600 and the screw sleeve 700 are disposed opposite to each other, and the valve needle sleeve 600 has a second thrust surface 601.
  • the first thrust surface 701 and the second thrust surface 601 are disposed opposite to each other, and the first thrust surface 701 can be separated from the second thrust surface 601 Or abutting, that is, the screw sleeve 700 can be relatively close to the valve needle sleeve 600 or the screw sleeve 700 can be relatively close to the valve needle sleeve 600 or the screw sleeve 700 can abut the valve needle sleeve 600, when the valve core head 631 and the first When the valve port 101 abuts and the excitation valve stem 64' starts to close the second valve port 633', the first thrust surface 701 begins to disengage from the second thrust surface 601, when the valve stem 64' and the second valve port When the 633' abuts, the first thrust surface 701 has been disengaged from the second thrust surface 60
  • the first The thrust surface 701 starts to approach the second thrust surface 601.
  • the first thrust surface 701 gradually approaches the second thrust surface 601 or the first thrust surface 701 and the second thrust.
  • the surface 601 abuts, that is, the screw sleeve 700 abuts against the valve needle sleeve 600 or the screw sleeve 700 and the valve needle sleeve 600. It should be noted that when the valve rod 64' is farthest from the second valve opening 633', the screw rod The sleeve 700 is in contact with the valve needle sleeve.
  • the core assembly 60' includes a connecting seat 61' and a valve body 63.
  • the connecting seat 61' includes a body 611' and a guiding portion 612.
  • the body 611' has a body cavity 6111', and the body cavity 6111' is provided with a second spring member.
  • 800 in the core assembly 60', the body 611' is provided with a first communication passage S1' and a third valve port 611d, one end of the second spring member 800 abuts against the third valve port 611d, and the other end abuts the screw sleeve 700.
  • the valve stem 64' is press-fitted into the guiding inner cavity 6121 of the guiding portion 612.
  • the guiding portion 612 has a stepped portion 6122.
  • the sleeve 62 is fixedly attached to the connecting seat 61' by welding with the stepped portion 6122, and the stepped portion 6122 and the valve core are convex.
  • a first spring member 400 is disposed between the rising portions 632.
  • the sound absorbing device 90 is further included to further reduce the refrigerant flow noise.
  • the sound absorbing device 90 includes a first sound absorbing member 91 for covering the first flow passage S1, and the second sound absorbing member 92, the second muffler 92 is received in the valve stem cavity 641' and located between the second valve port 633 and the third valve port 611d, and the third muffler 93 received in the spool cavity 635, the third muffler 93 It is fixedly mounted in the spool cavity 635 by the stopper 300.
  • the electronic expansion valve is further provided with a sealing member 80 for improving the sealing performance between the components of the electronic expansion valve, the sealing member 80 including the second sealing member 82,
  • the second sealing member 82 is disposed on the valve core 63.
  • the valve core 63 is provided with a groove portion 634, and the second sealing member 82 is fitted to the groove portion 634.
  • the threaded action of 70' converts the rotation of the screw 44' into an axial upward movement of the core assembly 60', and the first thrust surface 701 and the second thrust surface 601 are subjected to the self-elastic recovery of the second spring member 800.
  • Abutting, the screw rod 44' drives the connecting seat 61' and the sleeve 62' to move axially upward.
  • the supporting surface 622a' of the sleeve 62' gradually approaches the valve core convex surface 632a, and the valve stem 64' gradually moves away from the second
  • the valve port 633' and the second valve port 633' are opened to realize a small flow adjustment of the refrigerant.
  • the screw assembly 44' drives the core assembly.
  • the 60' overall continues upward movement, and the connecting rod 61' and the sleeve 62' drive the spool 63 away from the first valve port 101.
  • the first valve port 101 is opened to realize large flow adjustment of the refrigerant, and the screw 44' is rotated by the excitation of the coil member with the rotor member 41' and the fixed seat 42', and passes through the external thread portion 44a' of the screw 44'.
  • the structure design of the electronic expansion valve provided by the invention is transmitted to the rotor component through the excitation action of the coil driving component, and the rotation of the screw rod is directly converted into the axial lifting movement of the core component through the thread transmission action of the screw rod and the nut, and the cancellation is cancelled.
  • the structure of the reduction gear device and the bellows structure, the electronic expansion valve product has a simple overall structure, the output force requirement for the coil component is greatly reduced, and the reliability of the product actuation is improved, and can be realized under the control condition of a small driving force.
  • the large flow rate and small flow adjustment function of the electronic expansion valve, and the layer silencer device is arranged in the core assembly. When the refrigerant enters the valve cavity, it is silenced and disturbed, and the large bubble is gradually broken into smaller ones. The bubble reduces the refrigerant flow sound to achieve better noise reduction effect, and enhances the comfort of the customer during the use of the product.

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  • General Engineering & Computer Science (AREA)
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  • Thermal Sciences (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Lift Valve (AREA)

Abstract

Disclosed is an electronic expansion valve, comprising: a valve body (10) and a valve base (20), wherein the valve body (10) has a valve cavity (102), and the valve base (20) is provided with a first valve port (101); a rotor assembly (40), wherein the rotor assembly (40) comprises a rotor (41) and a screw shaft (44), the rotor (41) is fixedly connected to the screw shaft (44) directly or indirectly, and the screw shaft (44) has a male thread portion (44a); a support frame (50), wherein the support frame (50) is fixedly connected to the valve body (10), and comprises an engagement slot (53) and a first mounting hole (54) that corresponds to the screw shaft (44); a nut (70), wherein the nut (70) comprises an engagement portion (73) and a female thread portion (74a) that cooperates with the male thread portion (44a), and the engagement portion (73) can be axially moved up and down along the engagement slot (53); and a core assembly (60), wherein the core assembly (60) is fixedly connected to the nut (70), and can be axially moved up and down in the valve cavity (102) by means of the cooperation between the male thread portion (44a) and the female thread portion (74a). The core assembly (60) comprises: a connection base (61), wherein the connection base (61) is fixedly connected to a valve shaft (64); and a valve core (63), wherein the valve core (63) has a valve core head (631) that can be moved towards or away from the first valve port (101). The valve core (63) is further provided with a second valve port (633), and the valve shaft (64) can be moved towards or away from the second valve port (633). The design optimization of the electronic expansion valve results in the elimination of a reduction-gear device and a bellows structure, thereby achieving a simpler overall structure of the product. Moreover, a reduced output force requirement of a coil component enables miniaturization of the coil, and the flow rate of the electronic expansion valve can be adjusted even with a smaller driving force.

Description

电子膨胀阀Electronic expansion valve
本申请要求于2018年03月23日提交中国专利局、申请号为201810243059.1、发明名称为“电子膨胀阀”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。The present application claims priority to Chinese Patent Application No. 201810243059.1, entitled "Electronic Expansion Valve", filed on March 23, 2018, the entire disclosure of which is incorporated herein by reference.
技术领域Technical field
本发明涉及制冷控制技术领域,具体涉及一种调节冷媒流量的电子膨胀阀。The invention relates to the technical field of refrigeration control, and particularly relates to an electronic expansion valve for regulating the flow rate of a refrigerant.
背景技术Background technique
在制冷制热技术领域,电子膨胀阀是制冷制热设备的冷媒流量控制部件,主要由两部分组成,一部分为阀体部分用于流量调节,另一部分为用于驱动的线圈部分。In the field of refrigeration and heating technology, the electronic expansion valve is a refrigerant flow control component of a refrigeration and heating device, and is mainly composed of two parts, one part is a valve body part for flow adjustment, and the other part is a coil part for driving.
图1为背景技术中一种带有小流量调节功能的电子膨胀阀。其中线圈部分包括:永磁式步进电机1’、具有三级减速的正齿轮减速装置2’、具有将电机旋转运动转化成丝杆垂直运动的螺纹副结构4’,螺纹副结构4’形成有螺纹部5’、丝杆3’,阀体部分包括阀体8、大阀口10’,阀体8的内腔容纳有波纹管6’,波纹管6’固定连接有阀杆7’,阀杆7’带动阀针部9’在阀体8的内腔进行轴向升降运动以接近或远离大阀口10’以调节流经大阀口10’的冷媒的流量,阀针部9’还设有小阀口91’,阀杆7’在波纹管6’的作用下能够上下移动以打开或关闭小阀口91’,阀杆7’上固定 连接有挡片92’,下面结合作动原理简单描述产品作动方式:由空调***的电子控制器控制电子膨胀阀的步进电机1’带动减速装置2’,通过丝杆3’和螺纹部5’的螺纹配合作用丝杆3’向下运动,通过钢球及传力部件衬套作用使阀杆7’也向下运动,此时波纹管6’不断受到拉伸作用,阀针部9’逐渐靠近大阀口10’;当施加反向脉冲时,受波纹管6’的弹力回复作用,阀杆7’不断向上运动,阀杆7’逐渐朝远离小阀口91’的方向运动,小阀口91’开启,当挡片92’移动至于固定套的下端面抵接时带动阀针部9’整体朝远离大阀口10’的方向运动,该方案结构较为复杂,减速式齿轮装置的存在需线圈部件提供更大的驱动力来进行开闭阀,且在电子膨胀阀大小冷媒流量调节过程中往往需要借助于波纹管6’的回复力作用才得以开启,但随着产品的长期使用,波纹管6’易产生老化等现象就无法顺利实现开闭阀,有鉴于此如何对电子膨胀阀结构进行进一步优化设计,设计一种产品结构较为简单,小驱动力也能实现对电子膨胀阀的大小流量调节是本领域技术人员亟待解决的技术问题。Figure 1 is an electronic expansion valve with a small flow adjustment function in the background art. The coil part comprises: a permanent magnet type stepping motor 1', a spur gear reduction device 2' having a three-stage deceleration, a thread sub-structure 4' for converting a rotary motion of the motor into a vertical movement of the screw rod, and a thread sub-structure 4' is formed The threaded portion 5', the screw rod 3', the valve body portion includes a valve body 8, a large valve port 10', the inner cavity of the valve body 8 accommodates a bellows 6', and the bellows 6' is fixedly connected with a valve stem 7'. The valve stem 7' drives the valve needle portion 9' to perform an axial lifting movement in the inner cavity of the valve body 8 to approach or away from the large valve port 10' to regulate the flow rate of the refrigerant flowing through the large valve port 10'. The valve needle portion 9' There is also a small valve port 91', the valve stem 7' can be moved up and down under the action of the bellows 6' to open or close the small valve port 91', and the valve stem 7' is fixedly connected with a blocking piece 92'. The principle of motion briefly describes the mode of operation of the product: the stepping motor 1' of the electronic expansion valve controlled by the electronic controller of the air conditioning system drives the reduction gear 2', and the screw 3' is acted upon by the threaded rod 3' and the threaded portion 5' Moving downward, the valve stem 7' is also moved downward by the action of the steel ball and the bushing of the force transmitting member. The tube 6' is continuously subjected to stretching, and the needle portion 9' is gradually approached to the large valve port 10'; when a reverse pulse is applied, the elastic force of the bellows 6' is restored, and the valve stem 7' is continuously moved upward, the valve stem 7' gradually moves away from the small valve port 91', and the small valve port 91' is opened. When the blocking piece 92' is moved until the lower end surface of the fixing sleeve abuts, the valve needle portion 9' is integrally moved away from the large valve port 10'. The directional movement, the structure of the scheme is relatively complicated, the presence of the reduction gear device requires the coil component to provide a larger driving force for the opening and closing valve, and the bellows 6' is often required in the process of adjusting the flow rate of the electronic expansion valve. The resilience effect can be turned on, but with the long-term use of the product, the bellows 6' is prone to aging and other phenomena, and the opening and closing valve cannot be smoothly realized. In view of how to further optimize the structure of the electronic expansion valve, a design is designed. The product structure is relatively simple, and the small driving force can also realize the adjustment of the size and flow of the electronic expansion valve, which is a technical problem to be solved by those skilled in the art.
发明内容Summary of the invention
本发明的主要目的在于提供一种电子膨胀阀,产品结构较为简单且在小驱动力作用下也能实现对电子膨胀阀的大小流量调节。The main object of the present invention is to provide an electronic expansion valve, which has a simple product structure and can realize the flow adjustment of the electronic expansion valve under the action of a small driving force.
为了实现上述目的,本发明提供一种电子膨胀阀,包括:In order to achieve the above object, the present invention provides an electronic expansion valve comprising:
阀体和阀座,阀体具有阀腔,阀座设有第一阀口;转子组件,转子组件包括转子和丝杆,转子与丝杆直接或间接固定连接,丝杆具有外螺纹部;a valve body and a valve seat, the valve body has a valve cavity, the valve seat is provided with a first valve port; the rotor assembly, the rotor assembly comprises a rotor and a screw rod, and the rotor is fixedly connected directly or indirectly to the screw rod, and the screw rod has an external thread portion;
支撑架,支撑架与阀体固定连接,支撑架包括配合槽和第一安装孔,第一安装孔与丝杆相配合;螺母,螺母包括配合部以及与外螺纹部螺纹配合的内螺纹部,配合部能够沿配合槽进行轴向升降运动;芯体组件,芯体组件与螺母固定连接,通过外螺纹部和内螺纹部的螺纹配合作用,芯体组件能够在阀腔进行轴向升降运动,芯体组件包括连接座和阀芯,连接座与阀杆固定连接,阀芯具有阀芯头,阀芯头能够接近或远离第一阀口,阀芯还设有第二阀口,阀杆能够接近或远离第二阀口。a support frame, the support frame is fixedly connected with the valve body, the support frame comprises a matching groove and a first mounting hole, the first mounting hole is matched with the screw rod; the nut and the nut comprise a fitting portion and an internal thread portion that is threadedly engaged with the external thread portion, The mating portion can be axially moved up and down along the matching groove; the core assembly and the core assembly are fixedly connected with the nut, and the core assembly can perform axial lifting movement in the valve cavity by the screwing action of the external thread portion and the internal thread portion. The core assembly comprises a connecting seat and a valve core, the connecting seat is fixedly connected with the valve stem, the valve core has a valve core head, the valve core head can be close to or away from the first valve port, the valve core is further provided with a second valve port, and the valve stem can Approach or stay away from the second valve port.
本申请提供的电子膨胀阀,芯体组件和螺母固定连接,通过丝杆与螺母的螺纹配合作用,使芯体组件能够在阀腔进行轴向升降运动,取消了复杂的减速式齿轮装置及波纹管结构,对线圈部件所需的驱动力大大减小,通过对电子膨胀阀的芯体组件结构进一步优化设计,芯体组件包括阀芯和连接座,使连接座和阀杆固定连接,阀芯能够接近或远离第一阀口,阀杆能够接近或远离第二阀口,芯体组件根据丝杆和螺母的螺纹传递作用能在阀腔内进行轴向升降运动,以实现对电子膨胀阀的大小流量调节,整体产品结构较为简单,在小驱动力作用也能实现对电子膨胀阀的大小流量调节。The electronic expansion valve provided by the present application has a core assembly and a nut fixedly connected, and the core assembly can perform axial lifting movement in the valve cavity by the threaded action of the screw rod and the nut, thereby eliminating the complicated reduction gear device and the corrugation. The tube structure greatly reduces the driving force required for the coil component. By further optimizing the design of the core assembly structure of the electronic expansion valve, the core assembly includes a valve core and a connecting seat, so that the connecting seat and the valve stem are fixedly connected, and the valve core Being able to approach or move away from the first valve port, the valve stem can be approached or away from the second valve port, and the core assembly can perform axial lifting movement in the valve cavity according to the thread transmission of the screw rod and the nut to realize the electronic expansion valve The size and flow rate adjustment, the overall product structure is relatively simple, and the size and flow adjustment of the electronic expansion valve can also be realized under the action of small driving force.
附图说明DRAWINGS
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:The accompanying drawings, which are incorporated in the claims of the claims In the drawing:
图1为背景技术中的二段式电子膨胀阀整体结构剖视图;1 is a cross-sectional view showing the overall structure of a two-stage electronic expansion valve in the background art;
图2为本发明提供的第一种实施方式的电子膨胀阀整体结构剖视图;2 is a cross-sectional view showing the entire structure of an electronic expansion valve according to a first embodiment of the present invention;
图3为图2电子膨胀阀的芯体组件整体结构剖视图;Figure 3 is a cross-sectional view showing the entire structure of the core assembly of the electronic expansion valve of Figure 2;
图4为图2电子膨胀阀的支撑架结构立体示意图;Figure 4 is a perspective view showing the structure of the support frame of the electronic expansion valve of Figure 2;
图5为图2电子膨胀阀的螺母结构立体示意图;Figure 5 is a perspective view showing the nut structure of the electronic expansion valve of Figure 2;
图6为图2电子膨胀阀的连接座结构示意图;Figure 6 is a schematic structural view of the connecting seat of the electronic expansion valve of Figure 2;
图7为本发明提供的电子膨胀阀的阀芯整体结构剖视图;Figure 7 is a cross-sectional view showing the entire structure of a valve body of an electronic expansion valve according to the present invention;
图8为本发明提供的具有另一种芯体组件结构的电子膨胀阀整体结构剖视图;Figure 8 is a cross-sectional view showing the overall structure of an electronic expansion valve having another core assembly structure according to the present invention;
图9为本发明提供的第二种实施方式的电子膨胀阀整体结构剖视图;Figure 9 is a cross-sectional view showing the entire structure of an electronic expansion valve according to a second embodiment of the present invention;
图10为本发明提供的第三种实施方式的电子膨胀阀整体结构示意图;10 is a schematic overall structural view of an electronic expansion valve according to a third embodiment of the present invention;
图11-a、图11-b为本发明提供的电子膨胀阀的第一流通通道S1与第二流通通道S2之间两种位置关系示意图。11-a and 11-b are schematic diagrams showing the relationship between the first flow path S1 and the second flow path S2 of the electronic expansion valve provided by the present invention.
具体实施方式detailed description
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.
如图2所示为本发明提供的第一种实施方式的电子膨胀阀,包括阀体10和阀座20,阀体10形成有阀腔102,阀座20和阀体10可以为分体结构通过焊接固定,阀座10上开设有第一阀口101,阀座20和阀体10也可以为一体结构,阀体10的侧壁开设有第一连接口,该第一连接口焊接固定有第一连接接管100,阀座20的下端部开设有第二连接口,该第二连接口焊接固定有第二连接接管200,第一连接接管100与第二连接接管200通过第一阀口101进行连通,冷媒可以从第一连接接管100进入后通过第一 阀口101后由第二连接接管200流出或冷媒也可以从第二连接接管200进入后通过第一阀口101后由第一连接接管100流出,该电子膨胀阀的冷媒流动方向可以为双向流通。2 is an electronic expansion valve according to a first embodiment of the present invention, comprising a valve body 10 and a valve seat 20, the valve body 10 is formed with a valve chamber 102, and the valve seat 20 and the valve body 10 can be a separate structure. The first valve port 101 is opened on the valve seat 10 by the welding. The valve seat 20 and the valve body 10 can also be an integral structure. The side wall of the valve body 10 is provided with a first connecting port, and the first connecting port is welded and fixed. The first connecting connector 100 has a second connecting port at the lower end of the valve seat 20, and the second connecting port is welded and fixed with the second connecting connector 200. The first connecting connector 100 and the second connecting connector 200 pass through the first valve port 101. In communication, the refrigerant may flow from the first connecting nozzle 100 and then pass through the first valve port 101 and then flow out from the second connecting nozzle 200 or the refrigerant may also enter from the second connecting nozzle 200 and pass through the first valve port 101 and then be connected by the first connection. The nozzle 100 flows out, and the refrigerant flow direction of the electronic expansion valve can be bidirectionally circulated.
阀体10的上端部设有阀体突起部103,阀体突起部103的外周壁焊接固定有外壳部30,该外壳部30整体呈上端部为封闭口的筒状结构,外壳部30与阀体10一起构成电子膨胀阀的内腔,该电子膨胀阀的内腔大致分为上下腔体,下部腔体形成该阀腔102,上部腔体形成转子腔,外壳部30的外周部套设有线圈部件,电子膨胀阀的转子腔内容纳有转子组件40,该转子组件40包括转子部件41、固定座42、转轴43以及丝杆44,固定座42作为独立的部件不与转子部件41进行干涉,固定座42设置有引导孔,转轴43的一端与引导部相配合,另一端与丝杆44的丝杆安装孔相配合,转子部件41整体呈大致的H型结构,转子部件41设有一个以上转子凸起411,丝杆44设有丝杆台阶部441和丝杆凹槽部442,丝杆凹槽部442与转子凸起411相配合抵接,转子部件41与丝杆44为一体注塑成型结构,电子膨胀阀作动时由线圈驱动部件的励磁作用驱动转子部件41的旋转,因转子部件41与丝杆44作为固接的一个整体部件,丝杆44随转子部件41进行旋转,通过丝杆44的外螺纹部44a与螺母70的内螺纹部74a的螺纹配合作用带动芯体组件60在阀腔102内进行轴向升降运动,转轴43和固定座42的上端部与外壳部30的端部封闭口进行抵顶以对丝杆44轴向向上的移动进行限位。A valve body projecting portion 103 is provided at an upper end portion of the valve body 10. The outer peripheral wall of the valve body projecting portion 103 is welded and fixed to the outer casing portion 30. The outer casing portion 30 has a cylindrical structure in which the upper end portion is a closed port, and the outer casing portion 30 and the valve are provided. The body 10 together constitutes an inner cavity of the electronic expansion valve, the inner cavity of the electronic expansion valve is roughly divided into upper and lower cavities, the lower cavity forms the valve cavity 102, the upper cavity forms a rotor cavity, and the outer peripheral portion of the outer casing portion 30 is sleeved. The coil component, the rotor cavity of the electronic expansion valve, houses a rotor assembly 40 including a rotor component 41, a mount 42, a rotating shaft 43, and a lead screw 44. The mount 42 does not interfere with the rotor component 41 as a separate component. The fixing base 42 is provided with a guiding hole. One end of the rotating shaft 43 is matched with the guiding portion, and the other end is matched with the screw mounting hole of the screw rod 44. The rotor member 41 has a substantially H-shaped structure as a whole, and the rotor member 41 is provided with one. The rotor protrusion 411, the screw rod 44 is provided with a screw step portion 441 and a screw groove portion 442. The screw groove portion 442 is mated with the rotor protrusion 411, and the rotor member 41 and the screw rod 44 are integrally molded. Molded structure, electronic expansion valve actuation The rotation of the rotor member 41 is driven by the exciting action of the coil driving member. Since the rotor member 41 and the screw 44 are fixed as a single integral member, the screw 44 rotates with the rotor member 41, and is passed through the external thread portion 44a of the screw 44. The threaded engagement of the internal thread portion 74a of the nut 70 causes the core assembly 60 to perform an axial lifting movement within the valve chamber 102, and the upper end portion of the rotating shaft 43 and the fixing seat 42 is abutted against the end closing opening of the outer casing portion 30 to The axial movement of the lead screw 44 is limited.
如图4所示电子膨胀阀包括有支撑架50,该支撑架50整体大致呈上小下大的盖帽状结构,包括上支撑架51和下支撑架52,上支撑架51设有 第一安装孔54与丝杆44相配合供丝杆44穿过,上支撑架51的端部台面与丝杆44的丝杆台阶部441进行配合以对丝杆44的轴向向下移动进行限位,使丝杆只在周向进行旋转而无法在轴向方向进行升降运动,下支撑架52开设至少一条配合槽53用于与螺母70的配合,通过下支撑架52的外周壁与阀体突起部103的内周壁焊接固定从而将支撑架50整体固定安装于阀体10,该支撑架50对丝杆44的轴向运动以及螺母70的周向运动均起到限位作用,减少丝杆44的串动,防止因串动出现的脉冲或流量偏差。需要说明的是这里定义的支撑架50仅仅是针对本发明所提供的实施例中的形状描述,只要能够对丝杆44的轴向运动以及螺母70的周向运动起到限位作用,应当指出还可以有其他形状的变化如杯状部等其他形状结构,也应该涵盖在本发明要保护的范围之内。The electronic expansion valve shown in FIG. 4 includes a support frame 50. The support frame 50 has a generally large cap-like structure, including an upper support frame 51 and a lower support frame 52. The upper support frame 51 is provided with a first installation. The hole 54 cooperates with the screw 44 for the threaded rod 44 to pass therethrough, and the end table of the upper support frame 51 cooperates with the screw step 441 of the screw 44 to limit the axial downward movement of the screw 44. The screw rod is rotated only in the circumferential direction and cannot be lifted and moved in the axial direction. The lower support frame 52 defines at least one fitting groove 53 for engaging with the nut 70, and passes through the outer peripheral wall of the lower support frame 52 and the valve body protrusion portion. The inner peripheral wall of the 103 is welded and fixed to integrally fix the support frame 50 to the valve body 10. The support frame 50 plays a role in limiting the axial movement of the screw 44 and the circumferential movement of the nut 70, and reduces the screw 44. Stabilize to prevent pulse or flow deviation due to crosstalk. It should be noted that the support frame 50 defined herein is only for the shape description in the embodiment provided by the present invention, as long as it can limit the axial movement of the screw 44 and the circumferential movement of the nut 70, it should be pointed out Other shape changes, such as cup shapes, may also be included, and should be covered by the scope of the present invention.
结合图2-图3及图5-图7所示本发明提供的电子膨胀阀还包括有芯体组件60,该芯体组件60包括连接座61,该连接座61包括本体611和导向部612,本体611形成有本体腔6111且具有本体端面611a,本体端面611a上形成有卡槽611b,导向部612形成有导向内腔6121,如图5所示的螺母70包括有螺母70,螺母70包括螺母本体71、连接片72以及至少一个配合部73,连接片72可以为金属材质,螺母本体71可以为塑料材质,连接片72可以采用与螺母本体71一体注塑成型方式成型也可以选择连接片72和螺母本体71都为金属材质通过焊接固定连接,在此不对螺母的构成材质进行具体限定,连接片72具有连接片下端面72a,配合部73为由螺母本体71向外延伸的凸起部,配合部73能够与配合槽53进行卡合从而防止螺母70和芯体组件60的周向旋转,螺母本体71整体压配装入本体腔6111, 螺母70和芯体组件60固定连接,具体地螺母70的连接片72的下端面72a与连接座61的本体端面611a焊接固定使螺母70整体固定安装于芯体组件60,配合部73还与卡槽611b进行抵接,螺母70还设有螺母安装孔74供丝杆44穿过,在线圈的励磁作用下带动转子41的旋转,丝杆44随从转子41一起旋转,因丝杆44始终保持在周向方向的旋转,转子41和丝杆44固定连接,转子41也同丝杆44一样保持在周向的旋转,因此转子41能充分发挥其磁性作用,通过丝杆44的外螺纹部44a与螺母70的内螺纹部74a螺纹配合作用将丝杆44的旋转运动逐渐转化为芯体组件60在阀腔102的轴向升降运动,螺母70和芯体组件60一起在阀腔102进行轴向升降运动,该驱动方式为电子膨胀阀直动式的驱动方式,取消了复杂的减速式齿轮装置及波纹管构造,对线圈的输出力需求大大减小,能够实现线圈的小型化,即使是小驱动力也能够实现对电子膨胀阀的大小流量调节目的。为了实现更可靠的作动方式,可设置一个或两个配合部73,与配合部73相对应地配合槽53和卡槽611b也设置为一个或两个,当然配合部73也可以设置为3个以上,需要说明的是螺母70和芯体组件60为固定连接,螺母70和芯体组件60只进行轴向升降运动而无法进行轴向旋转运动,丝杆44通过螺纹副传递给螺母70驱动力,直接体现在芯体组件60的轴向升降运动上,有效避免脉冲延时,减少开阀脉冲偏差,丝杆44、螺母70以及芯体组件60三者之间始终处于相互轻预紧状态,驱动开始时减小了丝杆44对螺纹传动时的瞬间冲击,提升螺母70的使用寿命;驱动进行时,受力部位由螺纹副承担,又减小了螺母70的受力磨损风险。The electronic expansion valve provided by the present invention further includes a core assembly 60 including a connector block 61 including a body 611 and a guide portion 612. The body 611 is formed with a body cavity 6111 and has a body end surface 611a. The body end surface 611a is formed with a card slot 611b. The guiding portion 612 is formed with a guiding inner cavity 6121. The nut 70 shown in FIG. 5 includes a nut 70, and the nut 70 includes The nut body 71, the connecting piece 72 and the at least one engaging portion 73, the connecting piece 72 may be made of a metal material, the nut body 71 may be made of a plastic material, and the connecting piece 72 may be integrally formed by injection molding with the nut body 71 or the connecting piece 72 may be selected. The nut body 71 is fixedly connected by a metal material by welding. The material of the nut is not specifically limited. The connecting piece 72 has a connecting piece lower end surface 72a, and the engaging portion 73 is a convex portion extending outward from the nut body 71. The engaging portion 73 can be engaged with the engaging groove 53 to prevent the circumferential rotation of the nut 70 and the core assembly 60. The nut body 71 is integrally press-fitted into the body cavity 6111, and the nut 70 and the core assembly 60 are fixedly connected. Specifically, the lower end surface 72a of the connecting piece 72 of the nut 70 is welded and fixed to the main body end surface 611a of the connecting seat 61. The nut 70 is integrally fixed to the core assembly 60, and the engaging portion 73 is also abutted against the engaging groove 611b. Further, a nut mounting hole 74 is provided for the screw rod 44 to pass therethrough, and the rotation of the rotor 41 is driven by the excitation of the coil, and the screw rod 44 rotates together with the rotor 41, since the screw rod 44 always maintains the rotation in the circumferential direction, the rotor 41 The screw 44 is fixedly coupled to the screw 44, and the rotor 41 is also rotated in the circumferential direction like the screw 44. Therefore, the rotor 41 can fully exert its magnetic action, and is threaded by the external thread portion 44a of the screw 44 and the female screw portion 74a of the nut 70. The rotation of the screw 44 is gradually converted into the axial lifting movement of the core assembly 60 in the valve chamber 102, and the nut 70 and the core assembly 60 are axially moved up and down in the valve chamber 102, and the driving mode is electronic expansion. The valve direct-acting drive mode eliminates the complicated reduction gear device and bellows structure, greatly reduces the output force requirement of the coil, and can realize the miniaturization of the coil, enabling the electronic even for a small driving force. Flow regulating expansion valve size object. In order to achieve a more reliable manner of operation, one or two engaging portions 73 may be provided. The matching groove 53 and the latching groove 611b are also provided as one or two corresponding to the engaging portion 73. Of course, the engaging portion 73 may also be set to 3 More than one, it should be noted that the nut 70 and the core assembly 60 are fixedly connected, and the nut 70 and the core assembly 60 are only subjected to axial lifting movement and cannot perform axial rotational movement, and the screw 44 is transmitted to the nut 70 through the thread pair. The force is directly reflected in the axial lifting movement of the core assembly 60, effectively avoiding the pulse delay and reducing the valve pulse deviation, and the screw rod 44, the nut 70 and the core assembly 60 are always in a lightly pre-tightened state. When the driving starts, the instantaneous impact of the screw 44 on the screw transmission is reduced, and the service life of the nut 70 is improved; when the driving is performed, the force receiving portion is borne by the thread pair, and the risk of the force and wear of the nut 70 is reduced.
芯体组件60还包括阀芯63和阀杆64,连接座61与阀杆64固定连接,连接座61设有安装孔611c,阀杆64通过安装孔611c与连接座61焊接固定,阀芯63的至少部分本体能够沿导向内腔6121进行轴向移动,阀芯63包括阀芯头631,该阀芯头631能够接近或远离第一阀口101以调节流经第一阀口101的冷媒流量,阀芯63与第一阀口101一起构成大流量调节机构,阀芯63还设有第二阀口633,阀杆64能够接近或远离第二阀口633以调节流经第二阀口633的冷媒流量,阀杆64与第二阀口633一起构成小流量调节机构,该电子膨胀阀的芯体组件60还包括有套筒62,套筒62整体呈下端带开口部的筒状部件,套筒62具有开口部621,套筒62的下端形成有朝内弯折的支撑部622,支撑部622形成有支撑面622a,阀芯63通过阀芯凸起部632与支撑部622的配合悬挂于套筒62上以防止阀芯63的脱落,阀芯凸起部632具有与支撑面622a进行配合抵接的阀芯凸起面632a,套筒62通过与导向部612的台阶部6122焊接固定安装于连接座61,该阀芯凸起部632和台阶部6122之间还设置有第一弹簧部件400,该第一弹簧部件400用于闭阀状态时冷媒从第二连接接管200进入时,防止对芯体组件60造成的冲击,确保使阀芯63与第一阀口101的抵接,防止受冷媒的压力作用阀芯头631脱离第一阀口101。The core assembly 60 further includes a valve core 63 and a valve stem 64. The connecting seat 61 is fixedly connected to the valve stem 64. The connecting seat 61 is provided with a mounting hole 611c. The valve stem 64 is welded and fixed to the connecting seat 61 through the mounting hole 611c. At least a portion of the body is axially movable along the guiding lumen 61121, and the spool 63 includes a valve plug head 631 that is capable of approaching or moving away from the first valve port 101 to regulate the flow of refrigerant through the first valve port 101. The spool 63 together with the first valve port 101 constitutes a large flow regulating mechanism, and the spool 63 is further provided with a second valve port 633, and the valve stem 64 can approach or move away from the second valve port 633 to regulate the flow through the second valve port 633. The refrigerant flow rate, the valve stem 64 and the second valve port 633 together constitute a small flow adjustment mechanism, the core assembly 60 of the electronic expansion valve further includes a sleeve 62, and the sleeve 62 as a whole has a tubular member with an opening at the lower end. The sleeve 62 has an opening portion 621. The lower end of the sleeve 62 is formed with an inwardly bent support portion 622. The support portion 622 is formed with a support surface 622a. The valve core 63 is suspended by the valve core protrusion portion 632 and the support portion 622. On the sleeve 62 to prevent the valve core 63 from coming off, the valve core boss 632 has a support surface 622. a is engaged with the abutting valve core convex surface 632a, and the sleeve 62 is fixedly attached to the connecting seat 61 by being welded to the step portion 6122 of the guiding portion 612, and the valve core convex portion 632 and the step portion 6122 are further provided with a a spring member 400 for preventing the impact on the core assembly 60 when the refrigerant enters from the second connecting joint 200 when the valve is in the closed state, and ensuring that the spool 63 is in contact with the first valve port 101 In connection with the pressure of the refrigerant, the valve head 631 is prevented from coming off the first valve port 101.
为使产品在使用过程中进一步降低冷媒流动音提升客户使用舒适感,电子膨胀阀还包括有消音装置90,本体611开设有供冷媒流通的第一流通通道S1,消音装置90包括第一消音件91,该第一消音件91覆盖第一流通通道S1以消除流经的冷媒产生的涡流,将大气泡打碎成小气泡降低冷媒噪音,阀杆64形成有阀杆腔641且阀杆64的侧壁开设有贯通孔,该贯通孔 形成冷媒流通的第二流通通道S2,阀杆64包括杆头,该杆头上开设有供冷媒流通的第三流通通道S3,消音装置90还包括第二消音件92,该第二消音件92容纳于阀杆腔641并覆盖第三流通通道S3,消音装置90还包括有第三消音件93以及第四消音件94,第三消音件93容纳于阀芯63的阀芯腔635,第四消音件94设于阀杆64的外周部并覆盖第二流通通道S2,各消音件的材质可以是网孔状或块状消音件也可以是其叠加,在此不对消音件的具体材质作任何限定只需能够实现消音功能即可,下面以闭阀状态为例来简单说明消音作动原理,阀芯63的阀芯头631与第一阀口101抵接配合且阀杆64的杆头与第二阀口633抵接配合时,电子膨胀阀形成固定小流量调节状态即冷媒流经第三流通通道S3构成电子膨胀阀的固定小流量调节机构,冷媒从第一连接接管100进入后经过阀腔102通过第一消音件91消除冷媒产生的涡流以及将大气泡逐渐打碎后进入第一流通通道S1,经过第四消音件94消音扰流后通过第二流通通道S2进入阀杆腔641由第二消音件92消音扰流,再通过第三流通通道S3经第二阀口633进入阀芯腔635,又经第三消音件93消音扰流后最后通过第一阀口101流出第二连接接管200,冷媒通过消音装置的层层消音扰流作用大大减小了冷媒流动音,进一步提升了客户使用产品的舒适感,需要说明的是为了实现更为良好的消音效果,如图11-a、11-b所示可将第一流通通道S1和第二流通通道S2进行交错设置,将第一流通通道S1的中心线与所述第二流通通道S2的中心线进行垂直设置,可分别设置两条第一流通通道S1以及两条第二流通通道S2或仅设置一条第一流通通道S1以及两条第二流通通道S2,当冷媒进入阀腔102后由第一流通通道S1到第二流通通道S2的行程变长使冷媒通 过有效消音面积的距离变长,进一步提升消音扰流效果,为了防止各零部件之间的配合间隙有介质进入,该电子膨胀阀还设置有密封件80以提升电子膨胀阀的各零部件之间的密封性能,该密封件80包括第一密封件81,该第一密封件81设置于第四消音件94的外周部和导向部612的内周壁之间,还包括有第二密封件82,第二密封件82嵌装于阀芯63的凹槽部634内。In order to further reduce the refrigerant flow sound during use, the electronic expansion valve further includes a muffling device 90. The body 611 is provided with a first circulation passage S1 for circulating refrigerant, and the muffler device 90 includes a first muffler. 91, the first muffler 91 covers the first flow passage S1 to eliminate the eddy current generated by the flowing refrigerant, breaks the large bubble into small bubbles to reduce the refrigerant noise, and the valve stem 64 is formed with the valve stem cavity 641 and the valve stem 64 A through hole is formed in the side wall, and the through hole forms a second flow passage S2 through which the refrigerant flows. The valve stem 64 includes a head having a third flow passage S3 through which the refrigerant flows, and the muffler 90 further includes a second a muffling member 92, the second muffler 92 is received in the valve stem cavity 641 and covers the third flow passage S3. The muffler 90 further includes a third muffler 93 and a fourth muffler 94. The third muffler 93 is received in the valve. The spool chamber 635 of the core 63, the fourth silencing member 94 is disposed on the outer peripheral portion of the valve stem 64 and covers the second flow passage S2. The material of each of the silencing members may be a mesh-shaped or block-shaped sound-absorbing member or a superposition thereof. Here is not the muffler Any limitation of the body material only needs to be able to achieve the muffling function. The following is a simple example of the muffling operation principle by taking the valve closing state as an example. The valve core head 631 of the valve core 63 abuts against the first valve port 101 and the valve stem 64 When the club head is in abutting engagement with the second valve port 633, the electronic expansion valve forms a fixed small flow rate adjustment state, that is, a fixed small flow rate adjustment mechanism in which the refrigerant flows through the third circulation passage S3 to form an electronic expansion valve, and the refrigerant passes from the first connection nozzle 100. After entering, the vortex generated by the refrigerant is eliminated through the first sound absorbing member 91 through the valve chamber 102, and the large air bubble is gradually broken and then enters the first circulation passage S1, and is silenced by the fourth silencing member 94 and then enters the valve through the second circulation passage S2. The rod cavity 641 is silenced by the second muffler 92, and then enters the valve core cavity 635 through the third flow passage S3 through the second valve port 633, and is silenced by the third muffler 93, and finally passes through the first valve port 101. Flowing out of the second connecting joint 200, the refrigerant suppressing the flow of the refrigerant through the silencing device of the muffler device greatly reduces the flow sound of the refrigerant, further improving the comfort of the customer to use the product, and the need to explain is to achieve a better The muffling effect, as shown in FIGS. 11-a and 11-b, the first flow passage S1 and the second flow passage S2 may be alternately arranged to center the center line of the first flow passage S1 and the center of the second flow passage S2. The line is vertically disposed, and two first flow passages S1 and two second flow passages S2 or only one first flow passage S1 and two second flow passages S2 are respectively disposed, and when the refrigerant enters the valve chamber 102, The stroke of the flow passage S1 to the second flow passage S2 is lengthened, so that the distance of the refrigerant passing through the effective silencing area is lengthened, thereby further enhancing the noise-damping effect, and the electronic expansion valve is prevented in order to prevent the medium from entering between the components. A sealing member 80 is also provided to improve the sealing performance between the respective components of the electronic expansion valve, the sealing member 80 including a first sealing member 81 disposed at the outer peripheral portion of the fourth muffling member 94 and guided Between the inner peripheral walls of the portion 612, a second sealing member 82 is further included, and the second sealing member 82 is fitted into the groove portion 634 of the valve body 63.
下面简单陈述下该实施例电子膨胀阀的作动原理,由线圈磁力作用驱动转子41的旋转,丝杆44由转轴43与固定座42的上端部与外壳部30的抵顶以及支撑架50的限位作用只进行周向转动,通过丝杆44的外螺纹部44a与螺母70的内螺纹部74a的螺纹传动作用,丝杆带动螺母70以及芯体组件60一起在阀腔102内进行轴向升降运动,在开阀状态时,阀芯凸起部632支撑于套筒62的支撑面622a上并与其相抵接,当从开阀逐渐到闭阀过程中,螺母70和芯体组件60由螺纹传递作动向下运动,螺母70的配合部73受支撑架50的限位作用只可进行轴向升降运动,配合部73也沿配合槽53向下运动,阀芯63的阀芯头631逐渐靠近第一阀口101,此过程为大流量调节状态,当阀芯头631与第一阀口101配合抵接后受螺纹传动作用丝杆44带动螺母70和芯体组件60继续向下运动,阀芯凸起面632a与支撑面622a由原先的配合抵接状态逐渐脱落,阀杆64逐渐靠近第二阀口633,此过程为小流量调节状态,直至阀芯凸起面632a与支撑面622a之间脱离至最大距离时,阀杆64与第二阀口633抵接配合,实现闭阀过程;而在闭阀状态时,阀芯凸起部632与套筒62的支撑面622a为脱离状态,当需要从闭阀到开阀时,施加反向励磁脉冲驱动转子41的旋转,丝杆44 随从转动,受丝杆44和螺母70的螺纹传动作动螺母70和芯体组件60整体向上运动,配合部73也沿配合槽53向上移动,套筒62的支撑面622a逐渐靠近阀芯凸起面632a,阀杆64逐渐打开第二阀口633构成小流量调节状态,在此过程中阀芯63受第一弹簧部件400的弹簧力作用继续保持阀芯头631与第一阀口101之间的配合抵接,当支撑面622a与阀芯凸起面632a配合抵接时,阀杆64距离第二阀口633最远,受丝杆44和螺母70的螺纹传动作用螺母70和芯体组件60继续向上运动,由套筒62带动阀芯63向上抬升使阀芯头631逐渐远离第一阀口101,第一阀口打开构成大流量调节状态。The operation principle of the electronic expansion valve of this embodiment will be briefly described below, and the rotation of the rotor 41 is driven by the magnetic force of the coil. The screw shaft 44 is abutted from the upper end portion of the rotating shaft 43 and the fixed seat 42 and the outer casing portion 30 and the support frame 50. The limit action only performs circumferential rotation, and the screw drive nut 70 and the core assembly 60 are axially disposed in the valve chamber 102 by the screwing action of the external thread portion 44a of the screw 44 and the internal thread portion 74a of the nut 70. During the lifting movement, the valve core boss 632 is supported on and abuts against the support surface 622a of the sleeve 62. When the valve is gradually opened to the valve closing process, the nut 70 and the core assembly 60 are threaded. When the transmission is moved downward, the engaging portion 73 of the nut 70 can only perform the axial lifting movement by the limiting action of the support frame 50, the engaging portion 73 also moves downward along the engaging groove 53, and the valve head 631 of the spool 63 is gradually approached. The first valve port 101 is in a large flow adjustment state. When the valve plug head 631 is engaged with the first valve port 101, the screw drive 44 drives the nut 70 and the core assembly 60 to continue downward movement. The core convex surface 632a and the support surface 622a are originally The abutting state gradually falls off, and the valve stem 64 gradually approaches the second valve port 633. This process is a small flow adjustment state until the maximum distance between the valve core convex surface 632a and the support surface 622a is released, the valve stem 64 and the first The two valve ports 633 abut against each other to realize the valve closing process; and in the valve closing state, the valve core boss portion 632 and the support surface 622a of the sleeve 62 are disengaged, and when it is required to close from the valve to the valve opening, the reverse is applied. When the excitation pulse drives the rotation of the rotor 41, the screw 44 rotates, and the threaded transmission nut 70 and the core assembly 60 of the screw rod 44 and the nut 70 move upward as a whole, and the engaging portion 73 also moves upward along the engagement groove 53. The support surface 622a of the cylinder 62 gradually approaches the valve core convex surface 632a, and the valve stem 64 gradually opens the second valve port 633 to constitute a small flow adjustment state, in which the valve core 63 is maintained by the spring force of the first spring member 400. The engagement between the valve plug head 631 and the first valve port 101 abuts. When the support surface 622a is mated with the valve core convex surface 632a, the valve stem 64 is farthest from the second valve port 633, and the thread receiving rod 44 and The threaded nut 70 and the core assembly 60 of the nut 70 continue to move upward By the sleeve 62 driven spool valve body 63 upwardly so that the head 631 is gradually lifted away from the first valve port 101, constituting a first valve port opening big flow rate adjusting state.
以上通过对芯体组件60结构的优化设计使连接座61与阀杆64固定连接,在需开阀进行小流量调节过程中,通过丝杆44和螺母70的螺纹传递作用即可将丝杆44的轴向旋转运动转化为驱使芯体组件60整体在阀腔102进行轴向向上运动,在螺纹传动作用下使连接座61带动阀杆64逐渐远离第二阀口633从而形成小流量调节状态,其他在进行大小流量调节需求时也同样,无论是电子膨胀阀的阀芯63与第一阀口101的配合还是阀杆64与第二阀口633的配合过程中通过螺母70和丝杆44的螺纹配合作用,即电子膨胀阀的直动式的驱动方式就可实现对冷媒的大小流量调节,取消了复杂的齿轮减速式装置和波纹管结构,产品整体结构更为简单,对线圈部件的输出力要求低,能够实现线圈的小型化设计,即使是小驱动力也能顺利实现开闭阀。The connecting seat 61 is fixedly connected to the valve stem 64 by optimizing the structure of the core assembly 60. During the small flow adjustment process, the screw 44 can be transmitted through the screw thread of the screw 44 and the nut 70. The axial rotational motion is converted to drive the core assembly 60 to move axially upward in the valve chamber 102. Under the screw drive, the connecting seat 61 drives the valve stem 64 away from the second valve port 633 to form a small flow adjustment state. The same applies to the other requirements of the large and small flow rate adjustment, whether the valve core 63 of the electronic expansion valve cooperates with the first valve port 101 or the nut 44 and the screw 44 during the cooperation of the valve stem 64 and the second valve port 633. The threading action, that is, the direct-acting driving mode of the electronic expansion valve, can realize the adjustment of the flow rate of the refrigerant, eliminating the complicated gear reduction device and the bellows structure, and the overall structure of the product is simpler, and the output of the coil component is eliminated. The force requirement is low, and the coil can be miniaturized, and the opening and closing valve can be smoothly realized even with a small driving force.
如图8所示的为本发明提供的电子膨胀阀的芯体组件的另一种结构示意图,当冷媒只需单向从第一连接接管100进入阀体10的内部时该芯体组 件60就可取消套筒62和第一弹簧部件400,芯体组件60包括连接座61,连接座61为一体结构,该连接座61包括本体611和导向部612',导向部612'的下端部具有导向开口部621a',阀芯63的至少部分通过导向开口部621a'伸入阀腔102,导向部612'的下端部还具有向内进行弯折的导向支撑部612b',导向支撑部612b'形成有导向支撑面6121b',阀芯63的阀芯凸起部632通过与该导向支撑面6121b'悬挂于连接座61上,阀芯63的至少一部分能够沿导向内腔6121'进行轴向移动,导向部612'还具有内壁面612c',当阀杆64接近或远离第二阀口633时,内壁面612c'能够相对接近或远离阀芯凸起部632,具体地当阀芯头631与第一阀口101抵接后受励磁作用,连接座61连同阀杆64继续往下运动逐渐关闭第二阀口633,在此过程中,导向支撑面6121b'逐渐远离阀芯凸起面632a,而内壁面612c'逐渐靠近阀芯凸起部632;反之在受相反励磁作用时,阀杆64逐渐远离第二阀口633,连接座61连同阀杆64向上运动使内壁面612c'逐渐远离阀芯凸起部632,而导向支撑面6121b'逐渐靠近阀芯凸起面632a直至抵接后带动阀芯63打开第一阀口101。需要说明的是本发明提供的电子膨胀阀的导向部612'的导向支撑面6121b'与阀芯63的阀芯凸起面632a之间的距离或者套筒62的支撑面622a与阀芯凸起面632a之间的距离构成阀杆64与第二阀口633的小流量调节机构行程,其他相关部件的结构及作动原理已在上述电子膨胀阀作具体陈述在此不再一一赘述。FIG. 8 is another schematic structural view of the core assembly of the electronic expansion valve provided by the present invention. When the refrigerant only needs to enter the inside of the valve body 10 from the first connecting socket 100 in one direction, the core assembly 60 is The sleeve 62 and the first spring member 400 may be eliminated. The core assembly 60 includes a joint 61 that is a unitary structure. The joint 61 includes a body 611 and a guide portion 612'. The lower end portion of the guide portion 612' has a guide. The opening portion 621a', at least a portion of the valve body 63 extends into the valve chamber 102 through the guide opening portion 621a', and the lower end portion of the guide portion 612' further has a guide support portion 612b' bent inwardly, and the guide support portion 612b' is formed There is a guiding support surface 6121b', and the valve core protrusion 632 of the valve core 63 is suspended from the connecting seat 61 by the guiding support surface 6121b', and at least a part of the valve core 63 can be axially moved along the guiding inner cavity 6121'. The guiding portion 612' also has an inner wall surface 612c'. When the valve stem 64 approaches or moves away from the second valve opening 633, the inner wall surface 612c' can be relatively close to or away from the valve core projection 632, specifically when the valve head 631 and the first After a valve port 101 is abutted, it is excited, and the connecting seat 61 is followed by the valve stem 64. Continued downward movement gradually closes the second valve port 633. During this process, the guiding support surface 6121b' gradually moves away from the valve core convex surface 632a, and the inner wall surface 612c' gradually approaches the valve core convex portion 632; When acting, the valve stem 64 gradually moves away from the second valve port 633, and the connecting seat 61 moves upwardly together with the valve stem 64 such that the inner wall surface 612c' gradually moves away from the valve core projection 632, and the guiding support surface 6121b' gradually approaches the valve core convex surface. The 632a drives the spool 63 to open the first valve port 101 after the abutment. It should be noted that the distance between the guiding support surface 6121b' of the guiding portion 612' of the electronic expansion valve provided by the present invention and the valve core convex surface 632a of the valve core 63 or the supporting surface 622a of the sleeve 62 and the valve core projection The distance between the faces 632a constitutes the stroke of the small flow regulating mechanism of the valve stem 64 and the second valve port 633. The structure and operation principle of other related components have been specifically described in the above electronic expansion valve, and will not be further described herein.
如图9所示的为本发明提供的第二种实施方式的电子膨胀阀结构示意图,该电子膨胀阀与第一实施方式的电子膨胀阀对比不同点主要在于转子组件结构以及芯体组件结构,该电子膨胀阀包括转子组件40',转子组件 40'包括转子41'、与转子41'固定连接的固定座42'以及丝杆44',转子41'与固定座42'一体注塑成型,丝杆44'通过固定座42'与转子41'间接固定连接,固定座42'具有引导部且开设有固定座孔,丝杆44'的上端部与该固定座孔相配合且丝杆44'的上端部与外壳30的端部封闭口进行抵顶以限制丝杆44'的轴向向上运动,丝杆台阶部441'与上支撑架51的端部台面相抵接配合以限制丝杆44'的轴向向下运动,以使丝杆44'始终保持在周向的旋转,芯体组件60包括连接座61以及阀芯63,连接座61包括本体611以及导向部612,本体611具有本体腔6111,螺母70压配装入本体腔6111,本体611的侧壁设有第一流通通道S1且本体611具有第三阀口611d,阀杆64'压配装入导向内腔6121,阀杆64'具有杆头和阀杆腔641',杆头形成有第三流通通道S3,第一流通通道S1的外周部覆盖有第一消音件91,阀杆腔641'容纳有第二消音件92且第二消音件92位于第二阀口633'和第三阀口611d之间,第二消音件92覆盖第三流通通道S3,其余结构特征及作动方式已在第一实施例进行详细描述,在此不再一一赘述。FIG. 9 is a schematic structural view of an electronic expansion valve according to a second embodiment of the present invention. The electronic expansion valve is different from the electronic expansion valve of the first embodiment mainly in a rotor assembly structure and a core assembly structure. The electronic expansion valve includes a rotor assembly 40'. The rotor assembly 40' includes a rotor 41', a fixed seat 42' fixedly coupled to the rotor 41', and a screw 44'. The rotor 41' is integrally molded with the fixed seat 42'. 44' is indirectly fixedly coupled to the rotor 41' by a fixing seat 42' having a guiding portion and having a fixing seat hole, the upper end portion of the screw rod 44' mating with the fixing seat hole and the upper end of the screw rod 44' The portion is abutted against the end closing opening of the outer casing 30 to restrict the axial upward movement of the screw 44', and the screw step 441' abuts against the end table of the upper support frame 51 to limit the axis of the screw 44' Moving downward to keep the screw 44' always rotated in the circumferential direction, the core assembly 60 includes a connecting seat 61 and a valve core 63. The connecting base 61 includes a body 611 and a guiding portion 612. The body 611 has a body cavity 6111. The nut 70 is press-fitted into the body cavity 6111, and the body 611 The side wall is provided with a first flow passage S1 and the body 611 has a third valve port 611d. The valve stem 64' is press-fitted into the guide inner cavity 6121. The valve stem 64' has a head and a stem cavity 641', and the stem is formed with The third circulation passage S3, the outer peripheral portion of the first circulation passage S1 is covered with the first silencing member 91, the valve stem chamber 641' accommodates the second muffler 92, and the second muffler 92 is located at the second valve port 633' and the third Between the valve ports 611d, the second sound absorbing member 92 covers the third flow passage S3. The remaining structural features and actuation modes have been described in detail in the first embodiment, and will not be further described herein.
如图9和图10所示为本发明提供的第二种实施方式的电子膨胀阀结构示意图以及连接座结构示意图,该电子膨胀阀的转子组件40'包括转子41'、与转子41'固定连接的固定座42'以及丝杆44',转子41'与固定座42'一体注塑成型,固定座42'具有引导部且开设有固定座孔,固定座42'固定连接有连杆421,该连杆421包括水平部及纵向部,水平部与引导部焊接固定,纵向部通过固定座孔轴向伸入转子腔,螺母70'与连接片71'一体注塑成型且螺母70'通过连接片71'与阀体10固定安装,螺母70的外周部套设有弹簧导轨500,该弹簧导轨500包括滑环501,滑环501由钢丝 绕制而成能够沿弹簧导轨500做螺旋运动,连杆421与滑环501进行配合,为控制滑环501螺旋运动的上下止点,弹簧导轨500的上端部设置有上止动部,当滑环501向上运动至上止动点时上止动部会限制滑环501继续往上运动,弹簧导轨500的下端部设置有下止动部,当滑环501运动至下止动点时下止动部会限制滑环501继续往下运动,该弹簧导轨500、滑环501以及连杆421构成了电子膨胀阀的止动机构,通过连杆421与滑环501的配合作用以控制丝杆44的轴向方向的运动行程从而带动芯体组件60'在阀腔102的轴向升降运动,丝杆44'具有外螺纹部44a'且丝杆44'大致整体伸入螺母70'的螺母安装孔74',螺母70'设有内螺纹部74a',通过外螺纹部44a'与内螺纹部74a'的螺纹配合作动将丝杆44'受转子41'驱动的旋转运动转化为芯体组件60'在阀腔102的轴向升降运动,丝杆44'的下端部固定连接有丝杆套700,丝杆套700具有第一推力面701,连接座61'的上端部固定连接有阀针套600,阀针套600与丝杆套700呈对向设置结构,阀针套600具有第二推力面601,第一推力面701和第二推力面601对向设置,第一推力面701能够与第二推力面601脱离或抵接,即丝杆套700能够相对远离阀针套600或丝杆套700能够相对接近阀针套600或丝杆套700能够与阀针套600相抵接,当阀芯头631与第一阀口101相抵接后受励磁作用阀杆64'开始向下关闭第二阀口633'时,第一推力面701开始与第二推力面601发生脱离,当阀杆64'与第二阀口633'抵接时,第一推力面701已与第二推力面601脱离,即丝杆套700相对远离阀针套600,当阀杆64'向上运动开启第二阀口633'时,第一推力面701开始靠近第二推力面601,当阀杆64'不与第二阀口633'抵接时,第一推力面701逐渐靠近第二推力 面601或第一推力面701与第二推力面601相抵接,即丝杆套700相对靠近阀针套600或丝杆套700与阀针套600相抵接,需要说明的是当阀杆64'距离第二阀口633'最远时丝杆套700与阀针套为抵接状态。该芯体组件60'包括有连接座61'以及阀芯63,连接座61'包括本体611'以及导向部612,本体611'具有本体腔6111',该本体腔6111'设有第二弹簧部件800,芯体组件60'中,本体611'开设有第一连通通道S1'以及第三阀口611d,第二弹簧部件800的一端抵接于第三阀口611d,另一端抵接丝杆套700。阀杆64'压配装入导向部612的导向内腔6121,导向部612具有台阶部6122,套筒62通过与该台阶部6122焊接固定安装于连接座61',台阶部6122与阀芯凸起部632之间设置有第一弹簧部件400,为进一步降低冷媒流动噪音还包括有消音装置90,消音装置90包括第一消音件91,用于覆盖第一流通通道S1,,第二消音件92,该第二消音件92容纳于阀杆腔641'并位于第二阀口633与第三阀口611d之间,以及容纳于阀芯腔635的第三消音件93,第三消音件93通过挡件300固定安装于阀芯腔635中。为了防止各零部件之间的配合间隙有介质进入,该电子膨胀阀还设置有密封件80以提升电子膨胀阀的各零部件之间的密封性能,该密封件80包括第二密封件82,第二密封件82设置于阀芯63,具体地,阀芯63设有凹槽部634,第二密封件82嵌装于该凹槽部634。9 and FIG. 10 are a schematic structural view of an electronic expansion valve according to a second embodiment of the present invention and a schematic structural view of a connector. The rotor assembly 40' of the electronic expansion valve includes a rotor 41' and is fixedly coupled to the rotor 41'. The fixing seat 42' and the screw rod 44', the rotor 41' is integrally injection-molded with the fixing seat 42', the fixing seat 42' has a guiding portion and is provided with a fixing seat hole, and the fixing seat 42' is fixedly connected with the connecting rod 421, the connection The rod 421 includes a horizontal portion and a longitudinal portion. The horizontal portion is welded and fixed to the guiding portion. The longitudinal portion extends axially into the rotor cavity through the fixing seat hole. The nut 70' is integrally injection molded with the connecting piece 71' and the nut 70' passes through the connecting piece 71'. The valve body 10 is fixedly mounted, and the outer peripheral portion of the nut 70 is sleeved with a spring rail 500. The spring rail 500 includes a slip ring 501. The slip ring 501 is wound by a steel wire and can be spirally moved along the spring rail 500. The slip ring 501 is engaged to control the upper and lower dead points of the spiral movement of the slip ring 501. The upper end portion of the spring guide 500 is provided with an upper stop portion. When the slip ring 501 moves upward to the upper stop point, the upper stop portion limits the slip ring 501. Continue to move up, spring guide The lower end portion of the 500 is provided with a lower stop portion. When the slip ring 501 moves to the lower stop point, the lower stop portion restricts the downward movement of the slip ring 501, and the spring guide 500, the slip ring 501 and the link 421 constitute an electronic expansion. The locking mechanism of the valve cooperates with the slip ring 501 to control the movement stroke of the screw shaft 44 in the axial direction to drive the axial movement of the core assembly 60' in the axial direction of the valve chamber 102. The screw rod 44' The nut mounting portion 74' has an externally threaded portion 44a' and the lead screw 44' extends substantially integrally into the nut 70'. The nut 70' is provided with an internally threaded portion 74a' through the thread of the externally threaded portion 44a' and the internally threaded portion 74a'. Cooperating to convert the rotary motion of the screw 44' by the rotor 41' into the axial lifting movement of the core assembly 60' in the valve chamber 102, and the lower end of the screw 44' is fixedly connected with the screw sleeve 700, the screw The sleeve 700 has a first thrust surface 701, and the upper end portion of the connecting seat 61' is fixedly connected with a valve needle sleeve 600. The valve needle sleeve 600 and the screw sleeve 700 are disposed opposite to each other, and the valve needle sleeve 600 has a second thrust surface 601. The first thrust surface 701 and the second thrust surface 601 are disposed opposite to each other, and the first thrust surface 701 can be separated from the second thrust surface 601 Or abutting, that is, the screw sleeve 700 can be relatively close to the valve needle sleeve 600 or the screw sleeve 700 can be relatively close to the valve needle sleeve 600 or the screw sleeve 700 can abut the valve needle sleeve 600, when the valve core head 631 and the first When the valve port 101 abuts and the excitation valve stem 64' starts to close the second valve port 633', the first thrust surface 701 begins to disengage from the second thrust surface 601, when the valve stem 64' and the second valve port When the 633' abuts, the first thrust surface 701 has been disengaged from the second thrust surface 601, that is, the screw sleeve 700 is relatively far from the valve needle sleeve 600. When the valve rod 64' moves upward to open the second valve opening 633', the first The thrust surface 701 starts to approach the second thrust surface 601. When the valve stem 64' does not abut the second valve port 633', the first thrust surface 701 gradually approaches the second thrust surface 601 or the first thrust surface 701 and the second thrust. The surface 601 abuts, that is, the screw sleeve 700 abuts against the valve needle sleeve 600 or the screw sleeve 700 and the valve needle sleeve 600. It should be noted that when the valve rod 64' is farthest from the second valve opening 633', the screw rod The sleeve 700 is in contact with the valve needle sleeve. The core assembly 60' includes a connecting seat 61' and a valve body 63. The connecting seat 61' includes a body 611' and a guiding portion 612. The body 611' has a body cavity 6111', and the body cavity 6111' is provided with a second spring member. 800, in the core assembly 60', the body 611' is provided with a first communication passage S1' and a third valve port 611d, one end of the second spring member 800 abuts against the third valve port 611d, and the other end abuts the screw sleeve 700. The valve stem 64' is press-fitted into the guiding inner cavity 6121 of the guiding portion 612. The guiding portion 612 has a stepped portion 6122. The sleeve 62 is fixedly attached to the connecting seat 61' by welding with the stepped portion 6122, and the stepped portion 6122 and the valve core are convex. A first spring member 400 is disposed between the rising portions 632. The sound absorbing device 90 is further included to further reduce the refrigerant flow noise. The sound absorbing device 90 includes a first sound absorbing member 91 for covering the first flow passage S1, and the second sound absorbing member 92, the second muffler 92 is received in the valve stem cavity 641' and located between the second valve port 633 and the third valve port 611d, and the third muffler 93 received in the spool cavity 635, the third muffler 93 It is fixedly mounted in the spool cavity 635 by the stopper 300. In order to prevent medium from entering the fitting gap between the components, the electronic expansion valve is further provided with a sealing member 80 for improving the sealing performance between the components of the electronic expansion valve, the sealing member 80 including the second sealing member 82, The second sealing member 82 is disposed on the valve core 63. Specifically, the valve core 63 is provided with a groove portion 634, and the second sealing member 82 is fitted to the groove portion 634.
下面简单举例陈述该实施例电子膨胀阀由闭阀到开阀的作动原理,闭阀时阀芯头631与第一阀口101抵接配合,阀杆64与第二阀口633抵接配合,受线圈励磁作用转子41'进行旋转,固定座42'随从旋转并带动丝杆44'的旋转,连杆421带动滑环501沿弹簧导轨500轴向向上作动,通过丝 杆44'与螺母70'的螺纹传动作用将丝杆44'的旋转转化为芯体组件60'的轴向向上作动,受第二弹簧部件800的自身弹力回复作用第一推力面701和第二推力面601进行抵接,由丝杆44'带动连接座61'和套筒62'整体轴向向上运动,套筒62'的支撑面622a'逐渐靠近阀芯凸起面632a,阀杆64'逐渐远离第二阀口633',第二阀口633'开启实现冷媒小流量调节,当套筒62'的支撑面622a'与阀芯凸起面632a抵接后受螺纹传动作用丝杆44'带动芯体组件60'整体继续向上运动,由连接座61'和套筒62'带动阀芯63朝远离第一阀口101的方向作动,第一阀口101开启实现冷媒的大流量调节,丝杆44'由线圈部件的励磁作用随从转子部件41'以及固定座42'进行旋转,通过丝杆44'的外螺纹部44a'和螺母70'的内螺纹部74a'的螺纹传动作用将丝杆44'的旋转运动转化为芯体组件60'的沿轴向的升降运动,又通过阀针套700与丝杆套600之间的配合作用进一步带动芯体组件60'在阀腔102内进行轴向升降运动,该方案取消了复杂的齿轮式减速装置和波纹管结构,产品整体结构较为简单,通过丝杆44'与螺母70'的螺纹传动作用即电子膨胀阀直动式的驱动方式即可实现对电子膨胀阀大小流量调节的目的。The following is a simple example of the operation principle of the electronic expansion valve of the embodiment from the closed valve to the open valve. When the valve is closed, the valve head 631 abuts against the first valve port 101, and the valve stem 64 abuts with the second valve port 633. The rotor 41' is rotated by the coil excitation, the fixed seat 42' rotates and drives the rotation of the screw 44', and the connecting rod 421 drives the sliding ring 501 to move upward along the spring rail 500, through the screw 44' and the nut. The threaded action of 70' converts the rotation of the screw 44' into an axial upward movement of the core assembly 60', and the first thrust surface 701 and the second thrust surface 601 are subjected to the self-elastic recovery of the second spring member 800. Abutting, the screw rod 44' drives the connecting seat 61' and the sleeve 62' to move axially upward. The supporting surface 622a' of the sleeve 62' gradually approaches the valve core convex surface 632a, and the valve stem 64' gradually moves away from the second The valve port 633' and the second valve port 633' are opened to realize a small flow adjustment of the refrigerant. When the supporting surface 622a' of the sleeve 62' abuts against the valve core convex surface 632a, the screw assembly 44' drives the core assembly. The 60' overall continues upward movement, and the connecting rod 61' and the sleeve 62' drive the spool 63 away from the first valve port 101. Actuated, the first valve port 101 is opened to realize large flow adjustment of the refrigerant, and the screw 44' is rotated by the excitation of the coil member with the rotor member 41' and the fixed seat 42', and passes through the external thread portion 44a' of the screw 44'. And the threading action of the internal thread portion 74a' of the nut 70' converts the rotational movement of the screw 44' into an axial lifting movement of the core assembly 60', which is in turn between the valve sleeve 700 and the spindle sleeve 600. The cooperation function further drives the core assembly 60' to perform axial lifting movement in the valve chamber 102. This solution eliminates the complicated gear type reduction device and the bellows structure, and the overall structure of the product is relatively simple, and the screw 44' and the nut 70 are passed through the screw. 'The thread drive function, that is, the direct-acting drive mode of the electronic expansion valve can achieve the purpose of adjusting the flow rate of the electronic expansion valve.
以上对本发明的相关实施例进行了简单的陈述,需要说明的是以上所陈述的实施例只是本发明提供的电子膨胀阀结构的优选实施例,并不用于限制本发明,所陈述的芯体组件的结构均可以在不同的实施例中进行相互替换,例如本发明提供的第一种实施方式的电子膨胀阀的芯体组件结构完全可应用于第二实施方式的电子膨胀阀结构中。The foregoing embodiments of the present invention have been briefly described. It should be noted that the above-described embodiments are merely preferred embodiments of the electronic expansion valve structure provided by the present invention, and are not intended to limit the present invention, the stated core assembly. The structures of the electronic expansion valves of the first embodiment provided by the present invention can be completely applied to the electronic expansion valve structure of the second embodiment.
本说明书文本中出现的上、下、左、右、中、内等方位词以及第一、第二、第三、第四等序数词均是以相应的说明书附图所呈现的状态为基准进行说明,为介绍方便而引入不应当理解为对本发明的相关零部件的顺序上的限制。The upper, lower, left, right, middle, and inner orientation words and the first, second, third, fourth and other ordinal words appearing in the text of this specification are based on the state presented in the corresponding specification drawings. The description, for convenience of introduction, should not be construed as limiting the order of the related components of the present invention.
本发明提供的电子膨胀阀结构设计通过线圈驱动部件的励磁作用传递给转子部件,经丝杆和螺母的螺纹传动作动将丝杆的旋转直接转化为芯体组件的轴向升降运动,取消了减速式齿轮装置及波纹管结构,电子膨胀阀产品整体结构较为简单,对线圈部件的输出力需求大大减小同时提升了产品作动的可靠性,在较小驱动力的控制条件下也能够实现电子膨胀阀的大流量和小流量调节功能,且在芯体组件内进行层层消音装置的布置,当冷媒进入阀腔后对其进行消音扰流,将大气泡逐渐打碎变成较小的气泡减低冷媒流动音达到较好的降噪效果,提升客户在使用产品过程中的舒适感。The structure design of the electronic expansion valve provided by the invention is transmitted to the rotor component through the excitation action of the coil driving component, and the rotation of the screw rod is directly converted into the axial lifting movement of the core component through the thread transmission action of the screw rod and the nut, and the cancellation is cancelled. The structure of the reduction gear device and the bellows structure, the electronic expansion valve product has a simple overall structure, the output force requirement for the coil component is greatly reduced, and the reliability of the product actuation is improved, and can be realized under the control condition of a small driving force. The large flow rate and small flow adjustment function of the electronic expansion valve, and the layer silencer device is arranged in the core assembly. When the refrigerant enters the valve cavity, it is silenced and disturbed, and the large bubble is gradually broken into smaller ones. The bubble reduces the refrigerant flow sound to achieve better noise reduction effect, and enhances the comfort of the customer during the use of the product.
本发明除以上所陈述的相关实施例外,对于本领域技术人员来说,本发明还可以有各种更改和变化,但凡在本发明的精神原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。The present invention is not limited to the related embodiments set forth above, and various modifications and changes can be made thereto by those skilled in the art, and any modifications, equivalent substitutions, improvements, etc., made within the spirit of the invention. All should be included in the scope of protection of the present invention.

Claims (11)

  1. 一种电子膨胀阀,其特征在于,包括:An electronic expansion valve characterized by comprising:
    阀体(10)和阀座(20),所述阀体(10)具有阀腔(102),所述阀座(20)设有第一阀口(101);a valve body (10) and a valve seat (20), the valve body (10) has a valve chamber (102), the valve seat (20) is provided with a first valve port (101);
    转子组件(40),所述转子组件(40)包括转子(41)和丝杆(44),所述转子(41)与所述丝杆(44)固定连接,所述丝杆(44)具有外螺纹部(44a);a rotor assembly (40) including a rotor (41) and a lead screw (44), the rotor (41) being fixedly coupled to the lead screw (44), the lead screw (44) having External threaded portion (44a);
    支撑架(50),所述支撑架(50)与所述阀体(10)固定连接,所述支撑架(50)包括配合槽(53)和第一安装孔(54);a support frame (50), the support frame (50) is fixedly connected to the valve body (10), the support frame (50) comprises a matching groove (53) and a first mounting hole (54);
    螺母(70),所述螺母(70)包括配合部(73)以及与所述外螺纹部(44a)螺纹配合的内螺纹部(74a),所述配合部(73)能够沿所述配合槽(53)进行轴向升降运动;a nut (70) including a fitting portion (73) and an internal thread portion (74a) threadedly engaged with the external thread portion (44a), the fitting portion (73) being capable of following the fitting groove (53) performing an axial lifting movement;
    芯体组件(60),所述芯体组件(60)与所述螺母(70)固定连接,通过所述外螺纹部(44a)和所述内螺纹部(74a)的螺纹配合作用,所述芯体组件(60)的至少部分在所述阀腔(102)进行轴向升降运动,所述芯体组件(60)包括连接座(61)和阀芯(63),所述连接座(61)与阀杆(64)固定连接,所述阀芯(63)具有阀芯头(631),所述阀芯头(631)能够接近或远离所述第一阀口(101),所述阀芯(63)还设有第二阀口(633),所述阀杆(64)能够接近或远离所述第二阀口(633)。a core assembly (60) fixedly coupled to the nut (70) by a threaded engagement of the externally threaded portion (44a) and the internally threaded portion (74a) At least a portion of the core assembly (60) is axially moved up and down in the valve chamber (102), the core assembly (60) including a connector (61) and a spool (63), the connector (61) a fixed connection with a valve stem (64) having a valve plug head (631) capable of approaching or moving away from the first valve port (101), the valve The core (63) is also provided with a second valve port (633) that is capable of approaching or moving away from the second valve port (633).
  2. 根据权利要求1所述的电子膨胀阀,其特征在于,所述连接座(61)包括本体(611)和导向部(612/612'),所述本体(611)具有本体腔(6111), 所述导向部(612/612')具有导向内腔(6121/6121'),所述阀芯(63)的至少一部分在所述导向内腔(6121/6121')进行轴向移动。The electronic expansion valve according to claim 1, wherein said connecting seat (61) comprises a body (611) and a guiding portion (612/612'), said body (611) having a body cavity (6111), The guide (612/612') has a guiding lumen (6121/6121'), at least a portion of which is axially displaced within the guiding lumen (6121/6121').
  3. 根据权利要求2所述的电子膨胀阀,其特征在于,所述芯体组件(60)还包括套筒(62),所述套筒(62)与所述连接座(61)固定连接,所述阀芯(63)具有阀芯凸起部(632),所述套筒(62)具有开口部(621)以及支撑部(622),所述阀芯(63)的至少一部分通过所述开口部(621)伸入所述阀腔(102),所述支撑部(622)具有支撑面(622a),所述支撑面(622a)能够与所述阀芯凸起部(632)抵接或脱离。The electronic expansion valve according to claim 2, wherein said core assembly (60) further comprises a sleeve (62), said sleeve (62) being fixedly coupled to said connecting seat (61), The spool (63) has a spool boss (632) having an opening (621) and a support portion (622) through which at least a portion of the spool (63) passes a portion (621) extending into the valve cavity (102), the support portion (622) having a support surface (622a), the support surface (622a) being capable of abutting the valve core projection (632) or Get rid of.
  4. 根据权利要求3所述的电子膨胀阀,其特征在于,所述导向部(612)具有台阶部(6122),所述套筒(62)与所述台阶部(6122)固定连接,所述台阶部(6122)与所述阀芯凸起部(632)之间设有第一弹簧部件(400)。The electronic expansion valve according to claim 3, wherein the guide portion (612) has a step portion (6122), and the sleeve (62) is fixedly coupled to the step portion (6122), the step A first spring member (400) is disposed between the portion (6122) and the spool boss (632).
  5. 根据权利要求2所述的电子膨胀阀,其特征在于,所述导向部(612’)具有导向开口部(612a')以及导向支撑部(612b'),所述阀芯(63)的至少一部分通过所述导向开口部(612a')伸入所述阀腔(102),所述导向支撑部(612b')具有导向支撑面(6121b'),所述导向支撑面(6121b')能够与所述阀芯凸起部(632)抵接或脱离,所述导向部(612')还包括内壁面(612c'),所述内壁面(612c')能够接近或远离所述阀芯凸起部(632)。The electronic expansion valve according to claim 2, wherein the guide portion (612') has a guide opening portion (612a') and a guide support portion (612b'), at least a portion of the spool (63) The guide cavity (102) is extended through the guide opening (612a'), and the guide support (612b') has a guide support surface (6121b'), and the guide support surface (6121b') can The valve boss protrusion (632) abuts or disengages, the guide portion (612') further includes an inner wall surface (612c'), the inner wall surface (612c') being capable of approaching or away from the valve core protrusion (632).
  6. 根据权利要求3或5所述的电子膨胀阀,其特征在于,所述本体(611)设有安装孔(611c)及第一流通通道S1,所述阀杆(64)通过所述安装孔(611c)与所述本体(611)固定连接,所述阀杆(64)具有阀杆腔(641)。The electronic expansion valve according to claim 3 or 5, wherein the body (611) is provided with a mounting hole (611c) and a first flow passage S1 through which the valve stem (64) passes ( 611c) is fixedly coupled to the body (611), the valve stem (64) having a stem cavity (641).
  7. 根据权利要求6所述的电子膨胀阀,其特征在于,所述阀杆(64)的侧壁设有贯通孔,所述贯通孔形成第二流通通道S2,所述阀杆(64)的杆 头设有第三流通通道S3,所述电子膨胀阀还包括消音装置(90),所述第一流通通道S1的外周部覆盖有第一消音件(91),所述阀杆腔(641)容纳有第二消音件(92)且所述消音件(92)覆盖所述第三流通通道S3,所述阀芯(63)的阀芯腔(635)容纳有第三消音件(93),所述第三消音件(93)通过挡件(300)固定安装于所述阀芯腔(635),所述第二流通通道S2的外周部覆盖有第四消音件(94),所述第一流通通道S1的中心线垂直于所述第二流通通道S2的中心线。The electronic expansion valve according to claim 6, wherein a side wall of the valve stem (64) is provided with a through hole, and the through hole forms a second flow passage S2, and the stem of the valve stem (64) The head is provided with a third circulation passage S3, and the electronic expansion valve further includes a noise reduction device (90), and an outer peripheral portion of the first circulation passage S1 is covered with a first sound absorbing member (91), and the valve stem chamber (641) A second sound absorbing member (92) is accommodated, and the sound absorbing member (92) covers the third flow passage S3, and a spool chamber (635) of the valve core (63) houses a third sound absorbing member (93). The third sound absorbing member (93) is fixedly mounted to the valve core cavity (635) by a stopper (300), and the outer peripheral portion of the second flow passage S2 is covered with a fourth sound absorbing member (94), The center line of a flow passage S1 is perpendicular to the center line of the second flow passage S2.
  8. 根据权利要求7所述的电子膨胀阀,其特征在于,所述电子膨胀阀还包括密封件(80),所述密封件(80)包括第一密封件(81)及第二密封件(82),所述第一密封件(81)设于所述第四消音件(94)的外周部与所述导向部(612)的内周壁之间,所述第二密封件(82)嵌装于所述阀芯(63)的凹槽部(634)。The electronic expansion valve according to claim 7, wherein said electronic expansion valve further comprises a seal (80), said seal (80) comprising a first seal (81) and a second seal (82) The first sealing member (81) is disposed between the outer peripheral portion of the fourth silencing member (94) and the inner peripheral wall of the guiding portion (612), and the second sealing member (82) is fitted a groove portion (634) of the valve body (63).
  9. 根据权利要求3或5所述的电子膨胀阀,其特征在于,所述本体(611)设有第一流通通道S1及第三阀口(611d),所述阀杆(64')压配装入所述导向内腔(6121/6121'),所述阀杆(64')具有阀杆腔(641'),所述阀杆(64')的杆头形成第三流通通道S3。The electronic expansion valve according to claim 3 or 5, wherein the body (611) is provided with a first flow passage S1 and a third valve port (611d), and the valve stem (64') is press-fitted. Into the guiding lumen (6121/6121'), the valve stem (64') has a valve stem cavity (641'), and the stem of the valve stem (64') forms a third flow passage S3.
  10. 根据权利要求9所述的电子膨胀阀,其特征在于,所述电子膨胀还包括消音装置(90),所述第一流通通道S1的外周部覆盖有第一消音件(91),所述阀杆腔(641')容纳有第二消音件(92),所述消音件(92)覆盖所述第三流通通道S3且所述消音件(92)位于所述第二阀口(633)与所述第三阀口(611d)之间,所述阀芯(63)的阀芯腔(635)容纳有第三消音件(93)。The electronic expansion valve according to claim 9, wherein said electronic expansion further comprises a muffling device (90), and an outer peripheral portion of said first flow passage S1 is covered with a first muffler (91), said valve The rod cavity (641') houses a second muffler (92), the muffler (92) covers the third flow passage S3 and the muffler (92) is located at the second valve port (633) Between the third valve ports (611d), the spool chamber (635) of the spool (63) houses a third muffler (93).
  11. 一种电子膨胀阀,其特征在于,包括An electronic expansion valve characterized by including
    阀体(10)和阀座(20),所述阀体(10)具有阀腔(102),所述阀座(20)设有第一阀口(101);a valve body (10) and a valve seat (20), the valve body (10) has a valve chamber (102), the valve seat (20) is provided with a first valve port (101);
    转子组件(40'),所述转子组件(40')包括转子(41')和丝杆(44'),所述转子(41')与所述丝杆(44')固定连接,所述丝杆(44')具有外螺纹部(44a');螺母(70'),所述螺母(70')与所述阀体(10)固定连接,所述螺母(70')具有与所述外螺纹部(44a')相配合的内螺纹部(74a')。a rotor assembly (40'), the rotor assembly (40') including a rotor (41') and a lead screw (44'), the rotor (41') being fixedly coupled to the lead screw (44'), The lead screw (44') has an externally threaded portion (44a'); a nut (70') fixedly coupled to the valve body (10), the nut (70') having the The female threaded portion (74a') is fitted with a female threaded portion (74a').
    止动机构,所述止动机构包括连杆(421),套设于所述螺母(70')外周的弹簧导轨(500)以及滑环(501),所述连杆(421)与所述滑环(501)抵接配合以控制丝杆(44)的轴向运动行程;a stopping mechanism, the stopping mechanism comprising a connecting rod (421), a spring rail (500) sleeved on an outer circumference of the nut (70'), and a slip ring (501), the connecting rod (421) and the The slip ring (501) abuts to control the axial movement stroke of the screw (44);
    芯体组件(60'),所述芯体组件(60')包括连接座(61')以及阀芯(63),所述连接座(61')与阀杆(64')固定连接,所述阀芯(63)具有阀芯头(631),所述阀芯头(631)能够接近或远离所述第一阀口(101),所述阀芯(63)还设有第二阀口(633),所述阀杆(64')能够接近或远离所述第二阀口(633),所述连接座(61')的上端部与阀针套(600)固定连接,所述丝杆(44')的下端部与丝杆套(700)固定连接,所述阀针套(600)与所述丝杆套(700)呈对向设置,当所述阀杆(64')与所述第二阀口(633)抵接时,所述丝杆套(700)相对远离所述阀针套(600);当所述阀杆(64')未与所述第二阀口(633)抵接时,所述丝杆套(700)相对接近所述第二阀口(633)或与所述第二阀口(633)进行抵接。a core assembly (60'), the core assembly (60') including a connector (61') and a spool (63), the connector (61') being fixedly coupled to the valve stem (64') The spool (63) has a spool head (631) capable of approaching or away from the first valve port (101), and the spool (63) is further provided with a second valve port (633), the valve stem (64') can be close to or away from the second valve port (633), and the upper end of the connecting seat (61') is fixedly connected with the valve needle sleeve (600), the wire The lower end of the rod (44') is fixedly connected to the screw sleeve (700), and the valve needle sleeve (600) is disposed opposite to the screw sleeve (700) when the valve stem (64') is When the second valve port (633) abuts, the screw sleeve (700) is relatively far from the valve needle sleeve (600); when the valve stem (64') is not with the second valve port ( 633) When the abutment, the screw sleeve (700) is relatively close to the second valve port (633) or abuts the second valve port (633).
PCT/CN2019/079229 2018-03-23 2019-03-22 Electronic expansion valve WO2019179517A1 (en)

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CN114352747A (en) * 2022-01-20 2022-04-15 广东威灵电机制造有限公司 Electronic expansion valve, refrigeration equipment and automobile
CN114352752A (en) * 2022-01-20 2022-04-15 广东威灵电机制造有限公司 Electronic expansion valve, refrigeration equipment and automobile
CN114352751A (en) * 2022-01-20 2022-04-15 广东威灵电机制造有限公司 Electronic expansion valve, refrigeration equipment and automobile
CN115218562A (en) * 2021-04-15 2022-10-21 浙江三花智能控制股份有限公司 Electronic expansion valve

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