CN108361386A - Electric expansion valve - Google Patents
Electric expansion valve Download PDFInfo
- Publication number
- CN108361386A CN108361386A CN201710056894.XA CN201710056894A CN108361386A CN 108361386 A CN108361386 A CN 108361386A CN 201710056894 A CN201710056894 A CN 201710056894A CN 108361386 A CN108361386 A CN 108361386A
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- China
- Prior art keywords
- needle
- expansion valve
- electric expansion
- sleeve part
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007667 floating Methods 0.000 claims abstract description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000003466 welding Methods 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000003028 elevating effect Effects 0.000 description 4
- 239000007770 graphite material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000806 Latten Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002547 anomalous effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- -1 brass to be formed Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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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
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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
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
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- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Electric expansion valve, which is characterized in that including：Valve seat, the valve seat offer valve port；Close to or away from the valve port to carry out the needle of flow-rate adjustment to the electric expansion valve；Lead screw, the lead screw realize floating connection with the needle by sleeve part；The second gasket is provided between the needle and the sleeve part.The electronic expansion valve structure of this structure can also greatly reduce the resistance between needle and sleeve part in the case that even if spring rubs with sleeve part side wall.
Description
Technical field
The present invention relates to fluid control component technical field, more particularly to a kind of electric expansion valve.
Background technology
In cooling and warming technical field, electric expansion valve is the cold medium flux control unit of heating-cooling equipment, work
Process is generally：With the energization or power-off of the coil device as stator, the magnetic rotor component as rotor is driven to rotate, with
The lead screw that magnet rotor is fixedly connected and follows magnet rotor to rotate drives valve needle movements, and nut part is provided in electric expansion valve,
Nut part is provided with internal thread structure, correspondingly, external thread structure is provided on lead screw, by the cooperation of screw thread pair,
Lead screw is set also needle to be driven to make elevating movement while rotating, in a manner of adjusting the aperture between needle and valve port
The flow for the refrigerant for flowing through valve port is adjusted, to realizing system function and achieve the purpose that accurately control.
Electric expansion valve in refrigeration systems in use, the pressure of the vibration and refrigerant pulse of compressor, can to needle or
Lead screw brings certain impact；The concentricity between each component is affected, needle deflection can not be kept away simultaneously as lead screw rotates
Needle is driven also to rotate with exempting from, to cause the abrasion of screw thread pair and the abrasion at valve port position, and while above-mentioned abrasion
Also how design a kind of flexibility for improving and mutually being rotated between needle and lead screw along with the generation of noise, therefore, make valve
Needle does not rotate as possible, is that those skilled in the art are urgently to be resolved hurrily to the electronic expansion valve structure of inordinate wear and noise
The technical issues of.
Invention content
The technical problem to be solved in the present invention be a kind of electric expansion valve is provided, the electric expansion valve can improve needle with
The flexibility mutually rotated between lead screw, and reduce the abrasion of valve port and reduce noise, for this purpose, the present invention uses following technology
Scheme：
Electric expansion valve, which is characterized in that including：
Valve seat, the valve seat offer valve port；
Close to or away from the valve port to carry out the needle of flow-rate adjustment to the electric expansion valve；
Lead screw, the lead screw realize floating connection with the needle by sleeve part；
The second gasket is provided between the needle and the sleeve part.The electronic expansion valve structure of this structure, even if
In the case that spring rubs with sleeve part side wall, the resistance between needle and sleeve part can also be greatly reduced.
There is the sleeve part sleeve lower end plate portion, the needle there is flange, the flange to have needle lower flange portion,
Second gasket is arranged between sleeve lower end plate portion and needle lower flange portion.
Second gasket is made of PTFE filled graphite materials.
End plate is provided at the top of the sleeve part, the lower end of the lead screw is fixedly connected with boss.
Spring and point contact or contact structure are provided between the boss and the needle.
Support member is additionally provided with inside the sleeve part, there is the support member support rim, the spring to abut
On the support rim.
The bottom of the support rim is provided with spherical portion.
The first gasket is provided between the spherical portion and the needle.When lead screw and needle need to relatively rotate,
Lead screw at this time, sleeve part, spring, support member can be used as an entirety and needle relatively rotates, and be greatly improved valve
The flexibility of needle and lead screw rotation.
As an alternative, recess portion is provided at the top of the needle, the recess portion is provided with sphere, the sphere
It is abutted against with the bottom of the support rim.
Alternatively, recess portion is provided at the top of the needle, the recess portion is provided with sphere, the ball
Body is directly abutted against with the spring.
Above-mentioned alternative solution can be further simplified structure, cancel the first gasket or cancel the first gasket and support simultaneously
Component, to further decrease the moment of resistance rotated between needle and lead screw.
Description of the drawings
Fig. 1 is electronic expansion valve structure schematic views provided by the invention；
Fig. 2 is the needle component structure diagram of first embodiment provided by the invention；
Fig. 3 is the needle component structure diagram of second embodiment provided by the invention；
Fig. 4 is the needle component structure diagram of third embodiment provided by the invention；
Fig. 5 is the needle component structure diagram of the 4th embodiment provided by the invention.
Specific implementation mode
It is below in conjunction with the accompanying drawings and specific real in order to make those skilled in the art more fully understand technical scheme of the present invention
Applying example, the present invention is described in further detail.
Fig. 1 is please referred to, Fig. 1 is electronic expansion valve structure schematic diagram provided by the invention.
It should be pointed out that the present invention be directed to the needles of the electric expansion valve of the prior art and valve port fit structure to carry out
Improve, for the other component of electric expansion valve, such as magnet rotor, lead screw, nut, stop device component may be used it is logical
Technology can also use other that the electronic expansion valve structure of identical function may be implemented.The present invention is not to above-mentioned component
Structure be particularly limited, those skilled in the art can be applied to all according to the technical solution of present disclosure
On similar electronic expansion valve structure.
Electric expansion valve has valve seat 1, and metal cutting process forming may be used in valve seat 1, and is connected with the in its circumferential direction
One connecting tube 2, axial lower end is connected with the second connecting tube 3, and forms valve chamber 1b in the inside of valve seat 1, for refrigerant stream
It is logical.Valve port 1c is additionally provided on valve seat 1, valve port 1c is coordinated with needle 5, changes the circulating face between valve port 1c and needle 5
Product, to realize the accurate adjusting of flow.
In the top of valve seat 1, it is provided with the cover 4, the cover 4 is substantially cup-shaped, and bottom has opening, and connects with valve seat 1
Connect fixation.Specifically, can stage portion 1d be set in 1 upper end of valve seat, and by the bottom opening of the cover 4 and stage portion 1d
Cooperation, and implement welding and be fixed.
In the top of the cover 4, it is additionally provided with shell 15, the mode that welding may be used with the cover 4 for shell 15 is fixed,
In this way, being formed relatively closed space between shell 15, the cover 4, valve seat 1, and connected by the first connecting tube 2 and second
Pipe 3 carries out the adjusting of the circulation and flow of refrigerant.
In the space that shell 15 and the cover 4 are surrounded, it is provided with magnetic rotor component 14, magnetic rotor component 14 is used as stepping
The rotor of motor can incude and be rotated as the signal of the coil component of stator.Lead screw 16 is turned by connecting plate 17 and magnetic
Subassembly 14 is fixedly connected as an entirety, and specifically, lead screw 16 may be used with connecting plate 17 and be welded and fixed, magnetic rotor component
14 can be directly injection-moulded on connecting plate 17.
Fig. 2 is please referred to, Fig. 2 is the needle component structure diagram of first embodiment provided by the invention.
Floating connection is realized by sleeve part 25 between lead screw 16 and needle 5, sleeve part 25 is substantially cup-shaped, and bottom has
Opening portion 25b, needle 5 pass through opening 25b, into valve chamber in be in contact or detach with valve port.That is, working in electric expansion valve
In the process, needle 5 can be moved up and down with relative sleeve portion 25 in certain stroke, but can not be detached from the limitation of sleeve part 25.
The top of sleeve 25 is provided with end plate 10, end plate 10 is provided with end plate thrust face 10a, and the lower end of lead screw 16, which is fixed, to be connected
It is connected to boss 9, boss thrust face 9a is provided on boss 9, in assembly, after being first fixedly connected with boss 9 with lead screw 16
It is put into the inner space of sleeve part 25, is then again consolidated end plate 10 and sleeve part 25 using the such as modes such as welding
It is fixed.It is arranged oppositely in this way, boss thrust face 9a is formd with end plate thrust face 10a, and at the same time sleeve part 25 is suspended on silk
On bar 16.It can not be detached from, but can perform relative motion between sleeve part 25 and lead screw 16.Disengaging as described herein refers to sleeve
It both is separated into not no two separate parts of any restrictions each other between portion 25 and lead screw 16, and refers not only to without physically
Contact.
The bottom of sleeve part 25 is formed the sleeve lower end plate portion 25a with opening portion 25b, and the top of needle 5 has
Flange 51, the outer diameter of flange 51 are more than the internal diameter of opening portion 25b, would not be from opening in this way, when needle is fitted into sleeve part 25
Oral area 25b is detached from the constraint of sleeve part 25.Flange 51 has needle upper flange part 5b and needle lower flange portion 5a, when assembly is completed
Afterwards, the second gasket 27 is provided between needle lower flange portion 5a and sleeve lower end plate portion 25a, specifically, the second gasket 27 can
To use PTFE filled graphite materials, the Friction-Reducing Coatings such as PTFE can also be sprayed again by sheet metals such as brass to be formed, to protect
Demonstrate,prove the lubricity and wearability of the second gasket 27.
At the back of boss thrust face 9a, i.e., the lower section of boss 9 shown in FIG. 1 is additionally provided with spring 8 and support member
24, specifically, spring 8 is arranged between support member 24 and boss 9.Support member 24 has support rim 24a, is used to support
Spring 8.In a kind of specific embodiment, the bottom of support rim 24a is provided with spherical portion 5c, this setup,
So that it is formed point contact between support rim 24a and the first gasket 26 described below or line contacts, it can be more efficient
Ground reduces friction coefficient.In this way, just constituting point contact or contact structure between boss 9 and needle 5.
In the present embodiment, it is provided between support member 24 and needle 5 in the first circular gasket 26 so that the
One gasket 26 is abutted against with needle 5.PTFE filled graphite materials may be used in first gasket 26, to ensure lubricity and wear-resisting
Property.Or stainless steel is used, when using stainless steel, one small boss can be set in the upper end of needle to reduce by the first pad
The contact area of piece and needle.
Nut 11 is fixed on by metal connection sheet 18 in the space that shell 15 is surrounded with the cover 4.Specifically,
Nut 11 may be used nonmetallic materials and be shaped with 18 integrated injection molding of connection sheet, and connection sheet 18 and the cover 4 are passed through welding
Mode is fixedly connected.
Nut 11 have along its axially through through-hole, and the inside of the through-hole be arranged internal thread 11a, correspondingly
, one section of external thread part 16a is provided on the peripheral surface of lead screw 16, in this way when magnetic rotor component 14 rotates, therewith
The lead screw 16 of linkage is under the action of screw thread pair, while rotating, goes back opposing nut and makees elevating movement, to drive
Needle 5 makees elevating movement, makes needle 5 closer or far from valve port 112, to reach the mesh for adjusting the cold medium flux by valve port 112
's.
The bottom of nut 11 is additionally provided with nut guide part 11c, and nut guide part 11c is used for and guide portion described below
The outer edge of part 30 is oriented to.
In the present embodiment, the upper end of valve seat 1 is additionally provided with valve seat endoporus 1a, and is connected with valve chamber 1b.In valve seat
Hole 1a can be molded by way of machining.It is equipped with guide member 30 with valve seat endoporus 1a, guide member 30 is big
Body is cylindrical in shape, and in a kind of specific embodiment, peripheral surface has the first outer edge 30a and the second outer edge 30d,
In, the outer diameter of the first outer edge 30a is more than the outer diameter of the second outer edge 30d, the first outer edge 30a be used for valve seat endoporus 1a into
Row cooperation is fixed, and the mode of interference press-fitting or the mode of welding specifically may be used.The outer diameter and nut of second outer edge 30d
The internal diameter of guide part 11c is adapted, in this way, the mode of the two suit connection can ensure good assembly concentricity.
Certainly, it will be understood by those skilled in the art that the outer diameter of the first outer edge 30a shown in present embodiment is more than the
The outer diameter of two outer edge 30d is internal diameter design of the internal diameter based on valve seat endoporus 1a more than nut pilot hole 11c and is determined,
As equivalent alternative, the internal diameter of valve seat endoporus 1a can also be set smaller than to the internal diameter of nut pilot hole 11c, only
Such set-up mode can lead to becoming large-sized for nut in the case where valve seat size remains unchanged.
In a particular embodiment, be internally provided with sleeve steering portion 30c and the internal diameter of guide member 30 are less than set
The needle guide portion 30b of cylinder guide portion 30c.Wherein, the internal diameter of needle guide portion 30b and the outer diameter of needle 5 match so that valve
The outer edge surface of needle 5 can be moved freely along needle guide portion 30b, and good guiding is provided to needle 5 by needle guide portion 30b
And radial support, prevent the swing due to needle 5 from causing the inordinate wear of valve port 1c.
The outer diameter of the internal diameter and sleeve part 25 of sleeve steering portion 30c matches so that the outer edge surface of sleeve part 25 can edge
It sleeve steering portion 30b to move freely, good guiding and radial support is provided to sleeve part 25 by sleeve steering portion 30c,
Prevent the swing due to sleeve part 25 and and cause the anomalous swing of lead screw 26, shake and cause so as to cause magnetic rotor component 14
The inordinate wear of threaded portion and running noise.
In the present embodiment, the first outer edge 30a and sleeve steering portion 30c, the needle guide portion 30b of guide member 30
It can be processed and formed at one time, meanwhile, valve seat endoporus 1a, valve port 1c, stage portion 1d are to be processed and formed at one time, in this way, ensuring that
The concentricity of sleeve steering portion 30c, needle guide portion 30b and valve port 1c.
Meanwhile the lower end of guide member 30 some be located within valve chamber 1b, in this way, when high pressure refrigerant from first connect
When take over 2 is entered in valve, strong impact will not be caused to needle 5, to further prevent the swing of needle, reduces mill
Damage and noise.
Fig. 3 is please referred to, Fig. 3 is the needle component structure diagram of second embodiment provided by the invention.
For convenience of description, for part same as the first embodiment in present embodiment, it is no longer repeated,
Description only is made for difference.
In the present embodiment, the top of needle 5 is provided with recess portion 52, and sphere 35, sphere 35 are placed on recess portion 52
Diameter be more than recess portion 52 depth, in this way, the top of sphere 35 just directly offsets with the support rim 24a of support member 24
It connects, point contact or line contact can be equally realized, to reduce the friction coefficient between two components.
Sphere 35 can be specifically that sphere can also be made using steel ball or other metal materials made of Steel material
35, present embodiment does not define this.
Fig. 4 is please referred to, Fig. 4 is the needle component structure diagram of third embodiment provided by the invention.
In the present embodiment, compared with second embodiment, support member 24 is eliminated, directly at the top of needle 5
Recess portion 52 is set, and places sphere 35 on recess portion 52.Wherein, the diameter of sphere 35 is increased, and makes its internal diameter with spring
It is adapted, that is, is slightly larger than the internal diameter of spring 8 so that the lower end of spring 8 can press on sphere 35, without keeping sphere 35 whole
Body enters within spring 8.In this way, being formed point contact or contact structure between sphere 35 and needle 5.
Fig. 5 is please referred to, Fig. 5 is the needle component structure diagram of the 4th embodiment provided by the invention.
Floating connection is realized by sleeve part 25 between lead screw 16 and needle 5, sleeve part 25 is substantially cup-shaped, and bottom has
Opening portion 25b, needle 5 pass through opening 25b, into valve chamber in be in contact or detach with valve port.That is, working in electric expansion valve
In the process, needle 5 can be moved up and down with relative sleeve portion 25 in certain stroke, but can not be detached from the limitation of sleeve part 25.
The top of sleeve 25 is provided with end plate 10, end plate 10 is provided with end plate thrust face 10a, and the lower end of lead screw 16, which is fixed, to be connected
It is connected to boss 9, boss thrust face 9a is provided on boss 9, in assembly, after being first fixedly connected with boss 9 with lead screw 16
It is put into the inner space of sleeve part 25, is then again consolidated end plate 10 and sleeve part 25 using the such as modes such as welding
It is fixed.It is arranged oppositely in this way, boss thrust face 9a is formd with end plate thrust face 10a, and at the same time sleeve part 25 is suspended on silk
On bar 16.It can not be detached from, but can perform relative motion between sleeve part 25 and lead screw 16.Disengaging as described herein refers to sleeve
It both is separated into not no two separate parts of any restrictions each other between portion 25 and lead screw 16, and refers not only to without physically
Contact.
The bottom of sleeve part 25 is formed the sleeve lower end plate portion 25a with opening portion 25b, and the top of needle 5 has
Flange 51, the outer diameter of flange 51 are more than the internal diameter of opening portion 25b, would not be from opening in this way, when needle is fitted into sleeve part 25
Oral area 25b is detached from the constraint of sleeve part 25.Flange 51 has needle upper flange part 5b and needle lower flange portion 5a, when assembly is completed
Afterwards, the second gasket 27 is provided between needle lower flange portion 5a and sleeve lower end plate portion 25a, specifically, the second gasket 27 can
To use PTFE filled graphite materials, the Friction-Reducing Coatings such as PTFE can also be sprayed again by latten(-tin) to be formed, to ensure second
The lubricity and wearability of gasket 27.
At the back of boss thrust face 9a, i.e., the lower section of boss 9 shown in FIG. 1 is additionally provided with spring 8 and support member
24, specifically, spring 8 is arranged between support member 24 and boss 9.Support member 24 has support rim 24a, is used to support
Spring 8.In present embodiment, the bottom of support rim 24a is provided with concave shaped portion 24b, correspondingly, the top of needle 5
Recess portion 52 is arranged in portion, in this way, it is formed certain space between the concave shaped portion 24b of support member and the recess portion 52 of needle,
Sphere 35 is placed on recess portion 52, at this moment the top of sphere 35 is just abutted against with the inner spherical wall of concave shaped portion 24b.
In this way, being formed point contact or contact structure between sphere 35 and needle 5.
In the course of work of electric expansion valve, by giving step motor stator pulse command, driving magnet rotor 14 to revolve
Turn, drives lead screw rotation, and by the effect of screw thread pair, drive needle to make elevating movement, to obtain specific flow curve.
Since lead screw itself is rotating, one rotating torque of needle is inevitably natively given.When needle 5 and valve port 1c phases
When contact, valve port is closed, and flow levels off to 0, and after critical valve opening point, flow increases as pulse increases, with
Critical valve opening point is line of demarcation, at this point, needle 5 has just been contacted with the sealing surface of both valve port 1c, in order to improve the reliable of product
Property, it is expected that needle 5 does not rotate, and can easily relatively rotate between needle 5 and lead screw 16 at this time, that is, it is expected only silk
Bar 16 rotates, and needle 5 does not rotate.And at this point, boss thrust face 9a is also exactly in end plate thrust face 10a connects
The state of touching, and the atmospheric pressure suffered by spring force and needle 5 all acts between boss thrust face 9a and end plate thrust face 10a, or
Between person's sleeve lower end plate portion 25a and needle lower flange portion 5a.In order to ensure needle and lead screw energy flexible rotating, should drop as possible
Friction coefficient or sleeve lower end plate portion 25a between low above-mentioned boss thrust face 9a and end plate thrust face 10a with it is convex under needle
Friction coefficient between the 5a of edge.
Due to error that may be present in manufacture and assembly, the side of spring 8 is easy to rub with the inner wall of sleeve part 25
It wipes and increases resistance, so the aobvious ground of the reduction of the friction coefficient between sleeve lower end plate portion 25a and needle lower flange portion 5a is particularly
It is important.In several specific implementation modes provided by the invention, it is arranged between end plate 25a and needle lower flange portion 5a under a bushing
There is the second gasket 27, even if in the case that spring 8 rubs with 25 side wall of sleeve part, needle 5 and set can also be greatly reduced
Resistance between canister portion 25.
And the first gasket is set between needle upper end and support member 24, and it is provided with point contact or contact structure,
The resistance between needle 5 and support member 24 can also be greatly reduced.When lead screw 16 and needle 5 need to relatively rotate, at this time
Lead screw 16, sleeve part 25, spring 8, support member 24 can be used as an entirety and needle 5 relatively rotates, can carry significantly
The flexibility that high needle 5 is rotated with lead screw 16.
Even if after needle 5 leaves valve port 1c, in some occasions, due to the gap very little of needle 5 and valve port 1c, needle with
Rotation equally exists friction between valve port, due to the presence of the gasket between needle 5 and sleeve part 25, still can guarantee needle and valve
It does not relatively rotate between mouthful, valve port is avoided wear phenomenon occur.
And in second, third above-mentioned embodiment, it can be further simplified structure, cancel the first gasket or cancel simultaneously
First gasket 26 and support member 24, to further decrease the moment of resistance rotated between needle 5 and lead screw 16.
The term positions such as upper and lower, left and right as described herein are to be described with reference view shown in FIG. 1, not
It should be understood as limitation of the present invention.
Electric expansion valve provided by the present invention is described in detail above.Specific case used herein is to this
The principle and embodiment of invention is expounded, the explanation of above example is only intended to help understand the present invention method and
Its core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection of the claims in the present invention
In range.
Claims (11)
1. electric expansion valve, which is characterized in that including：
Valve seat (1), the valve seat (1) offer valve port (1c)；
Close to or away from the valve port (1c) to carry out the needle (5) of flow-rate adjustment to the electric expansion valve；
Lead screw (16), the lead screw (16) realize floating connection with the needle (5) by sleeve part (25)；
The second gasket (27) is provided between the needle (5) and the sleeve part (25).
2. electric expansion valve as described in claim 1, which is characterized in that the sleeve part (25) has sleeve lower end plate portion
There is flange (51), the flange (51) to have needle lower flange portion (5a), second gasket for (25a), the needle (5)
(27) it is arranged between sleeve lower end plate portion (25a) and needle lower flange portion (5a).
3. electric expansion valve as claimed in claim 2, which is characterized in that second gasket (27) uses PTFE filled graphites
Material is made of sheet metal spraying PTFE.
4. electric expansion valve as described in claim 1, which is characterized in that be provided with end plate at the top of the sleeve part (25)
(10), the lower end of the lead screw (16) is fixedly connected with boss (9).
5. electric expansion valve as claimed in claim 4, which is characterized in that be arranged between the boss (9) and the needle (5)
There are spring (8) and point contact or contact structure.
6. electric expansion valve as claimed in claim 5, which is characterized in that be additionally provided with support portion inside the sleeve part (25)
There is support rim (24a), the spring (8) to be connected to the support rim (24a) for part (24), the support member (24)
On.
7. electric expansion valve as claimed in claim 6, which is characterized in that the bottom of the support rim (24a) is provided with ball
Shape portion (5c).
8. electric expansion valve as claimed in claim 7, which is characterized in that the spherical portion (5c) and the needle (5) it
Between be provided with the first gasket (26).
9. electric expansion valve as claimed in claim 6, which is characterized in that it is provided with recess portion (52) at the top of the needle (5),
The recess portion (52) is provided with sphere (35), and the sphere (35) and the bottom of the support rim (24a) abut against.
10. electric expansion valve as claimed in claim 6, which is characterized in that the bottom of the support rim (24a) is provided with recessed
Shape portion (24b) is provided with recess portion (52) at the top of the needle (5), and the recess portion (is set between 52) Yu Suo Chen concave shaped portions (24b)
It is equipped with sphere (35).
11. electric expansion valve as claimed in claim 5, which is characterized in that be provided with recess portion at the top of the needle (5)
(52), the recess portion (52) is provided with sphere (35), and the sphere (35) directly abuts against with the spring (8).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710056894.XA CN108361386A (en) | 2017-01-26 | 2017-01-26 | Electric expansion valve |
| US16/478,422 US11261974B2 (en) | 2017-01-26 | 2018-01-24 | Electronic expansion valve |
| PCT/CN2018/073923 WO2018137636A1 (en) | 2017-01-26 | 2018-01-24 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710056894.XA CN108361386A (en) | 2017-01-26 | 2017-01-26 | Electric expansion valve |
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| CN108361386A true CN108361386A (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710056894.XA Pending CN108361386A (en) | 2017-01-26 | 2017-01-26 | Electric expansion valve |
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| CN (1) | CN108361386A (en) |
Cited By (10)
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| CN109751428A (en) * | 2017-11-07 | 2019-05-14 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| CN109990103A (en) * | 2018-01-02 | 2019-07-09 | 浙江三花智能控制股份有限公司 | A kind of electric expansion valve |
| CN111059295A (en) * | 2018-10-17 | 2020-04-24 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN111396599A (en) * | 2020-03-23 | 2020-07-10 | 浙江农林大学暨阳学院 | Flow control valve |
| CN112901795A (en) * | 2019-12-04 | 2021-06-04 | 伊希欧1控股有限公司 | Expansion valve |
| EP3832228A1 (en) * | 2019-12-04 | 2021-06-09 | ECO Holding 1 GmbH | Expansion valve |
| CN113685558A (en) * | 2021-09-29 | 2021-11-23 | 广东威灵电机制造有限公司 | Electronic expansion valve and refrigeration equipment |
| CN113748286A (en) * | 2019-06-28 | 2021-12-03 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN114352748A (en) * | 2022-01-26 | 2022-04-15 | 广东威灵电机制造有限公司 | Valve needle assembly, electronic expansion valve and refrigeration equipment |
| WO2022078233A1 (en) * | 2020-10-16 | 2022-04-21 | 浙江盾安人工环境股份有限公司 | Valve core assembly and electronic expansion valve |
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| CN109751428A (en) * | 2017-11-07 | 2019-05-14 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| CN109751428B (en) * | 2017-11-07 | 2022-04-26 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN109990103A (en) * | 2018-01-02 | 2019-07-09 | 浙江三花智能控制股份有限公司 | A kind of electric expansion valve |
| CN111059295A (en) * | 2018-10-17 | 2020-04-24 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN113748286A (en) * | 2019-06-28 | 2021-12-03 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN112901795A (en) * | 2019-12-04 | 2021-06-04 | 伊希欧1控股有限公司 | Expansion valve |
| EP3832228A1 (en) * | 2019-12-04 | 2021-06-09 | ECO Holding 1 GmbH | Expansion valve |
| CN111396599A (en) * | 2020-03-23 | 2020-07-10 | 浙江农林大学暨阳学院 | Flow control valve |
| WO2022078233A1 (en) * | 2020-10-16 | 2022-04-21 | 浙江盾安人工环境股份有限公司 | Valve core assembly and electronic expansion valve |
| CN113685558A (en) * | 2021-09-29 | 2021-11-23 | 广东威灵电机制造有限公司 | Electronic expansion valve and refrigeration equipment |
| CN114352748A (en) * | 2022-01-26 | 2022-04-15 | 广东威灵电机制造有限公司 | Valve needle assembly, electronic expansion valve and refrigeration equipment |
| CN114352748B (en) * | 2022-01-26 | 2024-02-20 | 广东威灵电机制造有限公司 | Valve needle assembly, electronic expansion valve and refrigeration equipment |
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