CN110529608A - Electric expansion valve - Google Patents
Electric expansion valve Download PDFInfo
- Publication number
- CN110529608A CN110529608A CN201810517508.7A CN201810517508A CN110529608A CN 110529608 A CN110529608 A CN 110529608A CN 201810517508 A CN201810517508 A CN 201810517508A CN 110529608 A CN110529608 A CN 110529608A
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- Prior art keywords
- needle
- valve
- electric expansion
- screw rod
- sleeve
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- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
- F16K1/04—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
- F16K1/487—Attaching valve members to screw-spindles by a fixing element extending in the axial direction of the spindle, e.g. a screw
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The present invention provides a kind of electric expansion valves, comprising: valve seat has valve support chamber and valve port；Sleeve, and valve seat split settings and is fixedly connected with valve seat, and at least partly sleeve protrudes into valve support chamber；Needle, part needle stretch in sleeve, and sleeve provides guiding role to needle；Screw rod can be rotated along the axis of itself, and screw rod is matched with needle by helicitic texture, and needle is under the drive of screw rod close to or far from valve port to adjust the fluid flow for flowing through valve port.The structure of electric expansion valve can be simplified by applying the technical scheme of the present invention, and improve assembly efficiency, reduce production cost.
Description
Technical field
The present invention relates to refrigeration control technical fields, in particular to a kind of electric expansion valve.
Background technique
In electronic expansion valve structure, as shown in Figure 1, by drive part (coil 7, rotor 8) and flow control division point (spiral shell
Mother 3, screw rod 4, shell, needle 5, valve seat 9, adapter tube etc.) composition.Specifically, rotor 8 is connect with the input terminal of retarder, screw rod 4
(screw rod 4 can rotate together with the output end of retarder, and screw rod 4 is in its axial direction with the connection of the output end of retarder
It can change with the relative position of the output end of retarder).Nut 3 is fixed on valve seat 9 and is threadedly coupled with screw rod 4, needle 5
It is fixedly connected with screw rod 4.Below under plain statement the product working principle: rotor 8 by coil 7 driving is rotated, slow down
The input shaft of device rotates under the driving of rotor, after retarder slows down, the output end of retarder will with lesser revolving speed into
Row rotation.Under the action of the output end of retarder, screw rod 4 carries out rotation.Screw rod 4 is by being threadedly engaged realization axis with nut 3
To movement.Under the action of screw rod 4, needle 5 carries out axial go up and down with close to or away from valve port 6.Although the electric expansion valve energy
Enough realize the adjusting purpose of flow, but the overall structure of above-mentioned electric expansion valve is complex, high production cost.
Summary of the invention
The main purpose of the present invention is to provide a kind of electric expansion valve, the structure that can simplify electric expansion valve reduces life
Produce cost.
To achieve the goals above, the present invention provides a kind of electric expansion valves, comprising: valve seat, have valve support chamber and
Valve port；Sleeve, is fixedly connected with valve seat and sleeve press-fitting is packed into valve support chamber, and at least partly sleeve protrudes into valve support chamber；Needle, part
Needle stretches in sleeve, and sleeve provides guiding role to needle；Screw rod can rotate, screw rod and needle along the axis of itself
It is matched by helicitic texture, needle is under the drive of screw rod close to or far from valve port to adjust the fluid stream for flowing through valve port
Amount.
It applies the technical scheme of the present invention, when screw rod rotation, the needle being threadedly engaged with it can be close or separate
Valve port flows through the fluid flow of valve port to adjust, and is threadedly engaged since screw rod directly passes through with needle, it is not necessary to pass through background technique
In the nut that is previously mentioned, reduce components, so that electric expansion valve overall structure can be realized simplification, eventually reduce
Production cost.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic diagram of internal structure of electric expansion valve in the prior art；
Fig. 2 shows the vertical profile structures when needle of the embodiment of electric expansion valve according to the present invention is connected to valve port to show
It is intended to；
Fig. 3 shows the enlarged structure schematic diagram at the A of the electric expansion valve of Fig. 2；
Fig. 4 shows the vertical profile structural schematic diagram when needle evacuation valve port of the electric expansion valve of Fig. 2；
The needle and the vertical profile structural schematic diagram after sleeve cooperation that Fig. 5 shows the electric expansion valve of Fig. 2；
Fig. 6 shows the vertical profile structural schematic diagram of the needle of the electric expansion valve of Fig. 2；
Fig. 7 shows the schematic perspective view of the sleeve of the electric expansion valve of Fig. 2；
Fig. 8 shows the vertical profile structural schematic diagram of the sleeve of Fig. 7；
Fig. 9 shows the schematic perspective view of the retaining ring of the electric expansion valve of Fig. 2；
Figure 10 shows the schematic perspective view of the support frame of the electric expansion valve of Fig. 2；
Figure 11 shows the vertical profile structural schematic diagram of the support frame of Figure 10；
Figure 12 shows the schematic perspective view of the valve seat body of the electric expansion valve of Fig. 2；
Figure 13 shows the vertical profile structural schematic diagram of the valve seat body of Figure 12；
Figure 14 shows the schematic perspective view of the valve core case of the electric expansion valve of Fig. 2；And
Figure 15 shows the vertical profile structural schematic diagram of the valve core case of Figure 14.
Wherein, the above drawings include the following reference numerals:
1, valve support chamber；2, accommodating chamber；10, valve seat；11, valve seat body；114, annular groove；115, the first opening；12, valve
Core print seat；121, valve port；20, needle；21, the first needle section；211, needle roof；212, needle side wall；213, mounting hole；22,
Second needle section；30, screw rod；31, second step face；40, support frame；41, support frame roof；411, pilot hole；42, support frame
Side wall；421, first section；422, second section；423, ring segment；50, driving mechanism；51, rotor；52, coil；100, outer
Shell；130, sleeve；131, sleeve body；132, the first bulge-structure；133, the first groove；134, the first retaining ring；140, it seals
Structure；160, the second groove；170, retaining ring；171, retaining ring ontology；172, lug；180, connection frame；190, supporting member；200, valve
Needle cavity.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 2 and Figure 4, the electric expansion valve of the present embodiment includes: valve seat 10, sleeve 130, needle 20 and screw rod
30.Wherein, valve seat 10 has valve support chamber 1 and valve port 121.Sleeve 130 is fixedly connected with valve seat 10 and the press-fitting of sleeve 130 is packed into
Valve support chamber 1, at least partly sleeve 130 protrude into valve support chamber 1.Part needle 20 stretches in sleeve 130, and sleeve 130 is to needle 20
Guiding role is provided.Screw rod 30 can be rotated along the axis of itself, and screw rod 30 is matched with needle 20 by helicitic texture, needle
20 fluid flows that are close under the drive of screw rod 30 or flowing through valve port 121 with adjusting far from valve port 121.
Using the technical solution of the present embodiment, when screw rod 30 rotates, the needle 20 that is threadedly engaged with it can it is close or
Person realizes the opening and closing of valve port far from valve port.It is threadedly engaged since screw rod 30 directly passes through with needle 20, without going through back
The nut being previously mentioned in scape technology is attached, and reduces components, so that the assembly efficiency of electric expansion valve can be big
Big to improve, production cost substantially reduces.In addition, applying the technical scheme of the present invention, electric expansion valve further includes dividing with valve seat 10
The sleeve 130 that body is arranged and is fixedly connected with valve seat 10, part needle 20 stretch in sleeve 130.When needle 20 is in screw rod 30
Drive under when moving axially, sleeve 130 can provide guiding role for needle 20, so that needle 20 can be moved along predetermined direction
It is dynamic, avoid needle 20 that beat phenomenon occurs when moving, and then needle 20 and valve seat 10 is avoided to generate collision.
It should be noted that in the present embodiment, the position of screw rod 30 in axial direction remains unchanged.It is above-mentioned along axial side
To position remain unchanged and refer to two kinds of situations: the first situation, in the axial direction, the position of screw rod 30 are completely fixed；
Second situation, the in the axial direction very small-scale movement since tolerances are able to carry out of upper screw rod 30.In the present embodiment,
Needle 20 is without rotation.Above-mentioned 20 not rotation of needle refers to two kinds of situations: the first situation, and needle 20 is completely without certainly
Turn；Second situation, in circumferential direction needle 20 since tolerances are able to carry out very small-scale rotation (rotation angle
It is small).
As shown in Figure 2 and Figure 4, in the present embodiment, sleeve 130 includes sleeve body 131, the roof of sleeve body 131
On be provided with the first groove 133, be provided with sealing structure 140 in the first groove 133, sealing structure 140 and sleeve body 131 with
And needle 20 abuts.Specifically, first interface and second interface are provided on valve seat 10, first interface is connected to valve port 121, valve
There is the needle chamber 200 being connected to valve port 121 in needle, sealing structure 140 is provided between sleeve body 131 and needle 20, it is close
Friction-reducing structure is provided between seal structure 140 and needle 20.Above-mentioned sealing structure 140 is not only able to prevent first interface and second
Interface passes through the gap area between valve seat 10 and needle 20, additionally it is possible to it prevents from being in communication with the outside inside valve seat 10, so as to
It is effectively isolated the transmitting of about 20 pressure difference of needle, guarantees that needle 20 can be supported at valve port 121 under the action of difference force.
Preferably, in the present embodiment, sealing structure 140 is O-ring.
As shown in figs. 5 and 9, in the present embodiment, it is provided with the first retaining ring 134 on the roof of sleeve body 131, seals
Structure 140 is connected between the lower surface of the first retaining ring 134 and the bottom wall of the first groove 133.Above structure makes sealing structure
140 can be in installation site always, to guarantee leakproofness.
As shown in Figures 2 to 6, in the present embodiment, sleeve 130 further includes being arranged on the inner wall of sleeve body 131
First bulge-structure 132, needle 20 are tensioning member, and needle 20 includes the first valve being adapted to the inner wall of the first bulge-structure 132
Needle section 21 and the second needle section 22 being adapted to the inner wall of sleeve body 131, the first needle section 21 and the second needle section 22
Junction forms First terrace, and the first bulge-structure 132 is located at the top of First terrace.Specifically, in the present embodiment,
The inner wall of first bulge-structure 132 is adapted to the outer wall of the first needle section 21, the inner wall of sleeve body 131 and the second needle section 22
Outer wall adaptation, the first needle section 21 and the second needle section 22 that above structure can be different to outer diameter play guiding role,
Beat phenomenon occurs when moving to further avoid needle 20.
As shown in Figure 5 and Figure 6, in the present embodiment, the first needle section 21 includes needle roof 211 and needle side wall
212, mounting hole 213 is provided on needle roof 211, helicitic texture is provided on the inner wall of mounting hole 213, screw rod 30 is threaded through
It is matched in mounting hole 213 and with helicitic texture, sealing structure 140 is abutted with sleeve body 131 and needle side wall 212, valve
Needle chamber is formed inside needle side wall 212.Above structure is simple, easy to process.
As shown in Figure 2 and Figure 4, in the present embodiment, electric expansion valve further includes support frame 40, support frame 40 and valve seat 10
Be fixedly connected, one of support frame 40 and needle 20 are provided with the second bulge-structure, support frame 40 with it is another in needle 20
Person is provided with the second groove 160, and the second bulge-structure can be moved axially along the second groove 160.Specifically, in this implementation
In example, needle 20 is threadedly engaged with screw rod 30.Screw rod 30 can rotation, and position in axial direction remains unchanged.Needle 20
It in axial direction upper can move, and be unable to rotation.When screw rod 30 rotates, needle 20 has rotation under the drive of screw rod 30
Trend, the side wall of the second bulge-structure between needle 20 and support frame 40 will be supported by the cell wall of the second groove 160 at this time
It connects, so that needle 20 is unable to rotation.But under the cooperation of internal and external threads, needle 20 can be moved in axial direction, thus
Realize the opening and closing of valve port.Above structure is simple, easy to process.
As shown in Fig. 2, Fig. 4, Fig. 5, Fig. 7 and Fig. 8, in the present embodiment, the second retaining ring is provided on the roof of needle 20
170, the second retaining ring 170 includes retaining ring ontology 171 and is arranged at the outer edge of retaining ring ontology 171 and outwardly extending lug
172, lug 172 forms the second bulge-structure.Above structure is simple, easy to process.
As shown in Fig. 2, Fig. 4, Figure 10 and Figure 11, in the present embodiment, support frame 40 includes support frame roof 41 and branch
Support side wall 42 is provided with pilot hole 411 on support frame roof 41, and part screw rod 30 is threaded through in pilot hole 411, support frame side
Wall 42 includes first section 421 connecting with support frame roof 41 and second section connecting with first 421 bottom of section
422, the outer diameter of second section 422 is greater than first section 421, and part needle 20 protrudes into second section 422, second section 422
Bottom be provided with the elongated slot upwardly extended, elongated slot forms the second groove 160, and the outer wall of second section 422 is interior with valve seat 10
Wall is fixedly connected.Pilot hole 411 can play guiding role to screw rod 30, existing to prevent screw rod 30 from generating beat in rotation
As.
As shown in Fig. 2, Fig. 4, Figure 10 and Figure 11, in the present embodiment, set between first section 421 and second section 422
It is equipped with ring segment 423, the second bulge-structure is arranged on needle 20, under the upper surface of the second bulge-structure and ring segment 423
Surface contacts, and the lower surface of ring segment 423 is the upper position-arresting point of needle 20, prevents needle 20 from continuing to move up.Specifically
Ground, when needle 20, which is moved along its axis to the upper surface of the second bulge-structure, to abut with the lower surface of ring segment 423, electronics is swollen
Swollen valve is shown in a fully open operation, and the flow of refrigerant can reach maximum at this time.
As shown in figure 3, in the present embodiment, it is provided with second step face 31 on the side wall of screw rod 30, it is also solid on screw rod 30
Surely it is provided with supporting member 190, support frame roof 41 is folded between the lower surface of supporting member 190 and second step face 31.Specifically
Ground, in the present embodiment, the gravity of support frame 40 are undertaken by valve seat 10, since support frame roof 41 is folded in supporting member 190
Between lower surface and second step face 31, therefore the gravity of screw rod 30 will be undertaken by support frame 40, and support frame 40 is by screw rod 30
In weight transfer to valve seat 10, finally undertaken by valve seat 10.In addition, in said structure, in the axial direction due to support frame 40
On position it is constant, therefore the position of screw rod connected to it 30 in the axial direction also can be realized it is constant.
As shown in Fig. 2, Fig. 4, Figure 12 and Figure 13, in the present embodiment, the top of valve seat 10 is provided with annular groove 114,
Electric expansion valve further includes driving mechanism 50, connection frame 180 and shell 100.Wherein, driving mechanism 50 include rotor 51 and
Coil 52, rotor 51 are fixedly connected with screw rod 30, and rotor 51 drives screw rod 30 to rotate by coil 52.The connection of connection frame 180 turns
Son 51 and screw rod 30.The bottom of shell 100 is set to annular groove 114, and is fixedly connected with valve seat 10, tool in shell 100
There is accommodating chamber 2, rotor 51, screw rod 30, connection frame 180 are respectively positioned in accommodating chamber 2.Above structure makes rotor 51, screw rod 30, connects
Connecing the equal more accurate structure of frame 180 can be contained in accommodating chamber 2, to improve the service life of electric expansion valve.
It should be noted that if accommodating chamber 2 and needle chamber 200 are disconnected, when needle 20 is supported in valve port
At 121, and when refrigerant enters needle chamber 200 from first interface (interface of vertical tube), the pressure of needle chamber 200 is much larger than accommodating chamber
2 pressure, such needle 20 will will receive upward difference force, may cause needle 20 far from valve port 121, so that needle
20 cannot keep detent position (needle 20 is connected to the position at valve port 121).At this point, only increasing driving force just can guarantee
Needle 20 is maintained at detent position.In order to avoid increasing driving force, in example 1, accommodating chamber 2 is connected to needle chamber 200.
Above structure to support at valve port 121 when needle 20, and when refrigerant enters needle chamber 200 from first interface, needle chamber 200
Pressure it is close with the pressure of accommodating chamber 2, such needle 20 will be greatly reduced by upward difference force, so that need not
Guarantee that needle 20 is maintained at detent position by increasing driving force.
As shown in Figure 2 and Figure 4, in the present embodiment, accommodating chamber 2 and needle chamber 200 pass through internal thread part and external thread part
Between gap connection.Above structure is simple, easy to process.
As shown in Fig. 2, Fig. 4, Figure 12 to Figure 15, in the present embodiment, valve seat 10 is tensioning member, and valve seat 10 includes valve seat sheet
Body 11 and valve core case 12, the bottom of valve seat body 11 are provided with the first opening 115, and the setting of valve core case 12 is in the first opening 115
Place, valve port 121 are set to valve core case 12, and the space that valve seat body 11 and valve core case 12 are surrounded forms valve support chamber 1.Above structure
Simply, enable needle 20 smoothly in upside-down mounting to valve seat 10.It should be noted that valve seat 10 in other embodiments can be with
It is integrally formed for stamping or cold-heading part.Needle 20 can also pass through stretching, punching press or cold-heading machine-shaping.Preferably, valve seat
10 and needle 20 be tensioning member, above structure can save material, and easy to process.
As shown in Fig. 2, Fig. 4, Figure 12 to Figure 15, in the present embodiment, the top of valve seat body 11 is provided with the second opening,
Sleeve 130 is pressed in the second opening.Above structure is simple, is easily assembled.
Technical solution of the present invention is illustrated below with reference to actuation principle:
In the case where being arranged the excitation for being installed on the coil 52 of 100 peripheral part of shell effect, rotor 51 rotate driving
Screw rod 30 follows rotation, screw rod 30 rotations and without actuation on axial direction.In the external screw thread and needle 20 of screw rod 30
Internal screw-thread screw effect under, screw rod 30 is able to drive needle 20 and moves upwards in the axial direction, needle 20 only in the axial direction into
Row elevating movement and without rotation, so that the sealing (bottom of needle 20) of needle 20 is gradually distance from valve port 121.It is fixed on valve
When the retaining ring 170 of needle 20 is abutted with the lower surface of ring segment 423, the sealing of needle 20 with respect to valve port 121 distance most
Greatly, it is also maximum for flowing through the cold medium flux of valve port 121 at this time.Under the effect of the excitation of coil 52, rotor 51 is reversely revolved
When turning, the external screw thread and needle 20 of screw rod 30 internal screw thread screw togather effect under, needle 20 can in the axial direction downwards
Movement, the sealing of needle 20 moves closer to valve port 121 at this time.When the relatively close support frame of retaining ring 170 for being fixed on needle 20
The lower end of 40 the second groove 160, when sealing is connected at valve port 121, electric expansion valve is in the state closed entirely, refrigerant
Flow is minimum.
It following is a brief introduction of the installation steps of the electric expansion valve:
Step: the integrated drawing and forming of valve seat body 11 is welded and fixed A10 with valve core case 12,11 side wall of valve seat body
With welding the first connecting tube and the second connecting tube is carried out on valve core case 12 respectively；
Step: A20, in the upper end thread mill drilling of needle 20, sleeve 130 is led to after the integrated drawing and forming of needle 20
The peripheral part that press fitting is packed into needle 20 is crossed, and is packed into sealing structure 140, retaining ring 170 and the upper end of needle 20 are welded and fixed；
Step: the component press-fitting that A30 is formed after assembling needle 20 and sleeve 130 is packed into the valve support chamber 1 of valve seat 10；
Step: support frame 40 and 10 end of valve seat are welded and fixed A40；
Step: A50 installs screw rod 30 and rotor 51；
Step: shell 100 and valve seat 10 are welded and fixed A60.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of electric expansion valve characterized by comprising
Valve seat (10) has valve support chamber (1) and valve port (121)；
Sleeve (130), is fixedly connected with the valve seat (10) and the sleeve (130) press-fitting is packed into the valve support chamber (1), at least
The part sleeve (130) protrudes into the valve support chamber (1)；
Needle (20), the part needle (20) stretch in the sleeve (130), and the sleeve (130) is to the needle
(20) guiding role is provided；
Screw rod (30) can be rotated along the axis of itself, and the screw rod (30) and the needle (20) are matched by helicitic texture
It closes, the needle (20) is flowed through under the drive of the screw rod (30) close to or far from the valve port (121) with adjusting described
The fluid flow of valve port (121).
2. electric expansion valve according to claim 1, which is characterized in that the sleeve (130) includes sleeve body
(131), it is provided with the first groove (133) on the roof of the sleeve body (131), is provided in first groove (133)
Sealing structure (140), the sealing structure (140) abut with the sleeve body (131) and the needle (20).
3. electric expansion valve according to claim 2, which is characterized in that be arranged on the roof of the sleeve body (131)
Have the first retaining ring (134), the sealing structure (140) is connected to the lower surface of first retaining ring (134) and described first recessed
Between the bottom wall of slot (133).
4. electric expansion valve according to claim 3, which is characterized in that the sleeve (130) further includes being arranged described
The first bulge-structure (132) on the inner wall of sleeve body (131), the needle (20) are tensioning member, needle (20) packet
Include the first needle section (21) being adapted to the inner wall of first bulge-structure (132) and with the sleeve body (131)
Second needle section (22) of inner wall adaptation, the junction of the first needle section (21) and the second needle section (22) form the
One step surface, first bulge-structure (132) are located at the top of the First terrace.
5. electric expansion valve according to claim 4, which is characterized in that the first needle section (21) includes needle roof
(211) and needle side wall (212) it, is provided with mounting hole (213) on the needle roof (211), the mounting hole (213)
Be provided with the helicitic texture on inner wall, the screw rod (30) be threaded through in the mounting hole (213) and with the helicitic texture
It matches, the sealing structure (140) abuts with the sleeve body (131) and the needle side wall (212).
6. electric expansion valve according to claim 1, which is characterized in that the electric expansion valve further include:
Support frame (40) is fixedly connected with the valve seat (10), and one of support frame as described above (40) and the needle (20) are set
It is equipped with the second bulge-structure, the other of support frame as described above (40) and the needle (20) are provided with the second groove (160), institute
Stating the second bulge-structure can move axially along second groove (160).
7. electric expansion valve according to claim 6, which is characterized in that be provided with second on the roof of the needle (20)
Retaining ring (170), second retaining ring (170) include retaining ring ontology (171) and are arranged in the outside of the retaining ring ontology (171)
Along place and outwardly extending lug (172), the lug (172) forms second bulge-structure.
8. electric expansion valve according to claim 6, which is characterized in that support frame as described above (40) includes support frame roof
(41) and support frame side wall (42) it, is provided with pilot hole (411) on support frame as described above roof (41), the part screw rod (30)
It is threaded through in the pilot hole (411), support frame as described above side wall (42) includes first section connecting with support frame roof (41)
(421) and with first section (421) bottom second section (422) connecting, the outer diameter of second section (422) are big
In first section (421), the part needle (20) is protruded into second section (422), second section (422)
Bottom be provided with the elongated slot upwardly extended, the elongated slot forms second groove (160), second section (422)
Outer wall is fixedly connected with the inner wall of the valve seat (10).
9. electric expansion valve according to claim 8, which is characterized in that first section (421) and described second
It is provided with ring segment (423) between section (422), second bulge-structure is arranged on the needle (20), and described second is convex
The lower surface of the upper surface and the ring segment (423) of playing structure contacts.
10. electric expansion valve according to claim 8, which is characterized in that be provided on the side wall of the screw rod (30)
Two step surfaces (31) are further fixedly arranged on supporting member (190) on the screw rod (30), and support frame as described above roof (41) is folded in institute
It states between the lower surface of supporting member (190) and the second step face (31).
11. electric expansion valve according to claim 1, which is characterized in that be provided with annular at the top of the valve seat (10)
Groove (114), the electric expansion valve further include:
Driving mechanism (50), including rotor (51) and coil (52), the rotor (51) are fixedly connected with the screw rod (30),
The rotor (51) drives screw rod (30) rotation by the coil (52)；
Connection frame (180) connects the rotor (51) and the screw rod (30)；
The bottom of shell (100), the shell (100) is set to the annular groove (114), and fixed with the valve seat (10)
Connection, the shell (100) is interior to have accommodating chamber (2), and the rotor (51), the screw rod (30), the connection frame (180) are equal
In the accommodating chamber (2).
12. electric expansion valve according to claim 1, which is characterized in that the valve seat (10) is tensioning member, the valve seat
It (10) include valve seat body (11) and valve core case (12), the bottom of the valve seat body (11) is provided with the first opening (115),
At first opening (115), the valve port (121) is set to the valve core case (12), institute for valve core case (12) setting
It states the space that valve seat body (11) and the valve core case (12) are surrounded and forms the valve support chamber (1).
13. electric expansion valve according to claim 12, which is characterized in that be provided at the top of the valve seat body (11)
Second opening, sleeve (130) press fitting is in second opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517508.7A CN110529608A (en) | 2018-05-25 | 2018-05-25 | Electric expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517508.7A CN110529608A (en) | 2018-05-25 | 2018-05-25 | Electric expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110529608A true CN110529608A (en) | 2019-12-03 |
Family
ID=68657099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810517508.7A Pending CN110529608A (en) | 2018-05-25 | 2018-05-25 | Electric expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110529608A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923013A (en) * | 2022-05-05 | 2022-08-19 | 广东威灵电机制造有限公司 | Electronic expansion valve and refrigeration equipment |
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| JPH11153244A (en) * | 1997-09-16 | 1999-06-08 | Fujikoki Corp | Solenoid valve |
| KR20060019716A (en) * | 2004-08-30 | 2006-03-06 | 자화전자 주식회사 | Electronic expansion valve for sealtype |
| CN103512288A (en) * | 2012-06-20 | 2014-01-15 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN103807486A (en) * | 2014-02-19 | 2014-05-21 | 碧茂科技（苏州）有限公司 | Limiting structure for rotor of expansion valve body |
| CN203686165U (en) * | 2014-01-17 | 2014-07-02 | 浙江盾安禾田金属有限公司 | Large electronic expansion valve |
| JP2014137127A (en) * | 2013-01-18 | 2014-07-28 | Fuji Koki Corp | Motor-operated valve |
| CN104791544A (en) * | 2014-01-20 | 2015-07-22 | 浙江三花股份有限公司 | Directly operated type electric valve and assembly method thereof |
| CN106705510A (en) * | 2015-07-17 | 2017-05-24 | 浙江三花智能控制股份有限公司 | Electronic expansion valve and valve seat component thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11153244A (en) * | 1997-09-16 | 1999-06-08 | Fujikoki Corp | Solenoid valve |
| KR20060019716A (en) * | 2004-08-30 | 2006-03-06 | 자화전자 주식회사 | Electronic expansion valve for sealtype |
| CN103512288A (en) * | 2012-06-20 | 2014-01-15 | 浙江三花股份有限公司 | Electronic expansion valve |
| JP2014137127A (en) * | 2013-01-18 | 2014-07-28 | Fuji Koki Corp | Motor-operated valve |
| CN203686165U (en) * | 2014-01-17 | 2014-07-02 | 浙江盾安禾田金属有限公司 | Large electronic expansion valve |
| CN104791544A (en) * | 2014-01-20 | 2015-07-22 | 浙江三花股份有限公司 | Directly operated type electric valve and assembly method thereof |
| CN103807486A (en) * | 2014-02-19 | 2014-05-21 | 碧茂科技（苏州）有限公司 | Limiting structure for rotor of expansion valve body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923013A (en) * | 2022-05-05 | 2022-08-19 | 广东威灵电机制造有限公司 | Electronic expansion valve and refrigeration equipment |
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