CN207584048U - Electric expansion valve - Google Patents
Electric expansion valve Download PDFInfo
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- CN207584048U CN207584048U CN201721434111.9U CN201721434111U CN207584048U CN 207584048 U CN207584048 U CN 207584048U CN 201721434111 U CN201721434111 U CN 201721434111U CN 207584048 U CN207584048 U CN 207584048U
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- valve
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- electric expansion
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- expansion valve
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Abstract
Electric expansion valve, which is characterized in that including：Valve seat and with the fixed valve core case of the valve seat, the valve core case offers valve port portion；Needle component, the needle component include sleeve part and needle portion；Both the valve port portion and the needle portion surface of at least one are coated with lubricant coating.Electric expansion valve provided by the utility model, by setting lubricant coating between valve port portion and needle portion, when electric expansion valve is closed, it can be ensured that the sealing reliability between needle portion and valve port portion will not leak.
Description
Technical field
The utility model is related to fluid control component technical field, more particularly to a kind of electronics applied in refrigeration system
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, drive and rotated as the magnetic rotor component of rotor, with
The 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 screw, by the cooperation of screw thread pair,
Screw is made 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, so as to fulfill system function and achievees the purpose that accurately to control.
In multi-line system, often an outdoor unit is used with more indoor units, in order to reduce energy consumption, each room
Interior machine can all match an electric expansion valve.Such as in occasions such as hotels, an outdoor unit carries up to a hundred indoor units.And multi-connected machine
Not every indoor unit all uses simultaneously in use.In refrigeration, the electric expansion valve for the indoor unit not used needs
It completely closes, the electric expansion valve slip of closed state is lower, and energy loss is with regard to smaller.Therefore, one kind how is designed to subtract
The electric expansion valve of Small leak rate is the technical issues of those skilled in the art is urgently to be resolved hurrily.
Utility model content
The technical problems to be solved in the utility model can close electric expansion valve to provide a kind of electric expansion valve
Sealing performance is further improved under state, reduces slip, for this purpose, the utility model uses following technical scheme：
Electric expansion valve, which is characterized in that including：Valve seat and with the fixed valve core case of the valve seat, the valve core case opens
Equipped with valve port portion；Needle component, the needle component include sleeve part and needle portion；Both the valve port portion and the needle portion
The surface of at least one is coated with lubricant coating.
Electric expansion valve provided by the utility model by setting lubricant coating between valve port portion and needle portion, works as electricity
When sub- expansion valve is closed, it can be ensured that the sealing reliability between needle portion and valve port portion will not leak.
The needle portion includes first conical surface, and the valve port portion includes sealing tapering, first conical surface and/sealing tapering
Coated with lubricant coating.
The needle portion further includes second conical surface, and the valve port portion further includes straight section portion, second conical surface and/straight section portion
Surface is coated with lubricant coating.
Guide section is provided on the internal perisporium of the valve core case, the periphery wall cooperation of the guide section and the sleeve part is led
To the guide section and/or the periphery wall surface are coated with lubricant coating.
The coating composition include polytetrafluoroethylene (PTFE), epoxy resin, polyimides, N-Methyl pyrrolidone, molybdenum disulfide,
Graphite.
The thickness of the coating is 5 μm~50 μm.
The content of polytetrafluoroethylene (PTFE) is 10%~50% in the coating, and the content of the polyimides is 5%~30%,
The content of the N-Methyl pyrrolidone is 0.1%~40%.
8th, electric expansion valve, which is characterized in that including：
Valve seat, the valve seat machining form, and the valve seat offers valve port portion；
Guide member, the guide member are fixedly connected with the valve seat, and needle, nut are oriented to；
Needle component, the needle component include sleeve part and needle portion；
Both the valve port portion and the needle portion surface of at least one are coated with lubricant coating.
Coating combines the lubricity of PTFE, the adhesiveness of epoxy resin and intensity, the adhesiveness of polyimides and wear-resisting
Property, N-Methyl pyrrolidone can make coating composition distribution it is more uniform so that coating lubricity is more preferable, adhesiveness is stronger, more resistant to
Mill, service life are longer.
Description of the drawings
Fig. 1 is the electronic expansion valve structure schematic views of first embodiment provided by the utility model；
Fig. 2 is A portions enlarged structure schematic diagram in Fig. 1；
Fig. 3 is the valve core case structure diagram of the utility model second embodiment；
Fig. 4 is the needle modular construction schematic diagram of the utility model second embodiment；
Fig. 5 is the electronic expansion valve structure schematic diagram of the utility model third embodiment.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in further detail for body embodiment.
Fig. 1, Fig. 2 are please referred to, Fig. 1 is the electronic expansion valve structure signal of first embodiment provided by the utility model
Figure, Fig. 2 are A portions enlarged structure schematic diagram in Fig. 1.
It should be pointed out that the utility model be for the electric expansion valve of the prior art needle and the components such as valve port into
Row improves, and the other component of electric expansion valve, such as magnet rotor, screw, nut, stop device component may be used
General technology can also use other that can realize the equivalent electronic expansion valve structure of identical function.The utility model is simultaneously
The structure of above-mentioned component is not particularly limited, the technical solution that those skilled in the art disclose according to the utility model can
To be applied on all similar electronic expansion valve structures.
Electric expansion valve has valve seat 1, and is connected with the first connecting tube 3 in its circumferential direction, and axial lower end is connected with the
Two connecting tubes 2, and valve chamber is formed in the inside of valve seat 1, so that refrigerant circulates.Valve port portion is directly or indirectly provided on valve seat 1
11, valve port portion 11 is coordinated with needle 51, changes the circulation area between valve port portion 11 and needle 51, so as to fulfill flow
It is accurate to adjust.
Valve seat 1 is fixedly connected with valve core case 4, and valve core case 4 is in general cylindrical shape, and in the present embodiment, valve port portion 11 is set
It puts on valve core case 4.Nut 8 is fixed with the suit of valve core case 4, can be oriented in assembling, to improve concentricity.Nut 8
Stop assembly 9 is provided on periphery, for controlling the stroke up and down of needle.Screw component 6 passes through thread fitting, magnetic with nut 8
Rotor 7 is rotated by the driving force of electromagnetic coil, the screw being fixedly connected with magnet rotor component 6 is driven to rotate together, in spiral shell
Under the action of screw thread pair between mother 8 and screw component 6, screw component 6 makees lifting fortune also relative to nut 8 while rotating
It is dynamic, and then needle component 5 is driven closer or far from valve port portion 11, to realize the adjusting to the flow in valve port portion 11.
Screw needle component mainly includes screw component 6 and needle component, and the two is by the way of floating connection.Wherein,
Needle component further includes sleeve part 52 and needle portion 51, and sleeve part 52 can be both an integral molding structure with needle portion 51,
Can be separate structure, for example needle portion 51 and sleeve part 52 can be designed as split structure, and be configured to：Needle portion 51
It can be moved, but cannot be detached from relative sleeve portion 52.
Floating connection is realized by sleeve part 53 between screw component 6 and needle component, sleeve part 52 is generally cylindrical,
Its periphery wall is matched with the internal perisporium of valve core case 4 so that when making elevating movement, valve core case 4 can carry needle component for it
For being oriented to.It can not be detached between sleeve part 52 and screw 6, but the opposite displacement of upper and lower directions and the position of circumferencial direction can be made
It moves." disengaging " described in this specification refers to be separated between sleeve part 52 and screw 6 each other without two lists of any restrictions
Only component, and the two is referred not only to without contact physically.
Needle portion 51 has the first tapering 51a and the second tapering 51b, and valve port portion 11 has sealing tapering 11a and straight section
Portion 11b, when needle portion 51 is contacted with valve port portion 11, the first tapering 51a is in contact with sealing tapering 11a.
Give step motor stator fully closed instruction, needle portion 51 contacts and is close to valve port portion 11.Due to needle portion 51 and valve
Oral area 11 is process by stainless steel, therefore in the prior art, between the two be sealed into hard sealing.If needle portion with
Valve port portion there are it is slight the defects of can then generate internal leakage off-gage phenomenon, lead to the failure of entire product or scrap.
In the present embodiment, in both sealing tapering 11a in the sealing tapering 51a in needle portion 51 and valve port portion 11 at least
Increase coating on one face, so as to fulfill the soft seal in needle portion 51 and valve port portion 11.Meanwhile can also to improve valve port close for coating
The wearability of cover and valve pin sealing surface ensures even if relatively rotated under contact condition in needle portion and valve port portion not
Abrasion can be generated, further reduced the risk that interior leakage occurs in use in electric expansion valve.Meanwhile needle portion or valve port
After the sealing surface in portion increases coating, because the friction coefficient of coating is low, needle portion can be reduced and the risk of self-locking occur with valve port portion.
The main component of coating is polytetrafluoroethylene (PTFE) (PTFE), epoxy resin, polyimides, N-Methyl pyrrolidone, two
Molybdenum sulfide, graphite etc..
Wherein PTFE has good corrosion resistance and high-lubricity and elasticity, is the main material of soft seal selection,
Lubricating action is primarily served in structure and increases elasticity, is slightly lacked on sealing pair with reducing the secondary frictional resistance of friction and making up
Sunken effect.Polyimides plays bonding, can particularly increase coating abrasion performance, improves coating service life.N- methyl
Pyrrolidones can make ingredient granules in coating be uniformly dispersed, and make that painting thickness is uniform, and frictional resistance is minimized, molybdenum disulfide,
Graphite can further reduce friction coefficient and the intensity of coating.
Coating implementation is very convenient, and coating is covered in required contact surface by the way of coating, can implement office
Portion sprays, also can integral spray.Present embodiment is using locally sprayed, you can with only spray first conical surface 51a in needle portion with
And the sealing tapering 11a in valve port portion 11.And when valve port portion 11 is left in needle portion 51, needle can together be rotated with screw, low
Pulse area, since needle there is a possibility that bias so that the second tapering for being used to adjust flow of the lower part in needle portion 51
51b may be touched with valve port portion 11, and valve port portion or the second tapering are likely to result in during touching and slight abrasion occurs,
So as to which flow curve be caused to drift about, therefore can also also be sprayed in second conical surface 51b in needle portion and the straight section portion 11b in valve port portion
Above-mentioned coating.
Since coating contains the materials such as PTFE, molybdenum disulfide, graphite, polyimides, skin-friction coefficient is contacted after coating
Low, wearability is good, while coating thickness can select suitable coating thickness according to rigorous service condition, and coating layer thickness is from 5 μm
~50 μm arbitrary optional, takes into account economy, preferably 5~25 μm of this programme, has than tradition plating PTFE+NIP techniques huge excellent
More property, tradition plating PTFE+NIP coating layer thicknesses can only achieve 3 μm, and the PTFE thickness that can play lubricating action applies thickness less than entire
/ 10th of degree degree, the coating is easy to wear, and can only implement part and integrally coat, and can not avoid welding surface.
For coating is made to reach optimum efficiency, PTFE contents are less than 10% for 10%~50%, PTFE contents in coating material
Lubricant effect can be reduced, and can make coating adherence and strength of coating insufficient higher than 50%.Polyimide content for 5%~
30%, content does not have less than 5% and improves coating adhesion, improves the anti abrasive effect of coating, and content can make painting higher than 30%
Layer lubricating action is insufficient.N-Methyl pyrrolidone content is 0%~40%, plays dispersion coatings particle, and content is higher than 40%
Strength of coating, cementability, lubricating action can be made insufficient.
Fig. 3, Fig. 4 are please referred to, Fig. 3 is the valve core case structure diagram of the utility model second embodiment, and Fig. 4 is this reality
With the needle modular construction schematic diagram of novel second embodiment.Present embodiment is made on the basis of first embodiment
Advanced optimize.
On the basis of first embodiment, guide section 4a is additionally provided on the internal perisporium of valve core case 4, for needle portion
The periphery wall 52a of the sleeve part 52 of part is matched, and sleeve part 52 is oriented to.Since needle component is in rotation process,
There may be eccentric situations, it is possible to the peripheral surface of sleeve part 52 and the guide section 4a of valve core case can be caused to touch, made
Into needle rotation torsion increase, there are the hidden danger of abrasion.Therefore, in the present embodiment, in guide section 4a and sleeve part 52
Periphery wall one of both increase and coating or increase coating at two, as shown in Figure 3, Figure 4.
Coating described in present embodiment is identical with the coating described in first embodiment, and this is no longer going to repeat them.
Fig. 5 is please referred to, Fig. 5 is the electronic expansion valve structure schematic views of third embodiment provided by the utility model.
In the present embodiment, electric expansion valve is not provided with valve core case, and valve port portion 110 is set up directly on machining and forms
Valve seat 10 on, and guide member 300 is set between valve seat 10 and nut 80, guide member 300 is fixedly connected with valve seat 10,
Not only needle portion 510 was oriented to, but also sleeve part 530 was oriented to, nut 80 was oriented to again when mounted, from
And the concentricity of entire product is further improved, reduce frictional force.
Nut 80 is fixed with the suit of guide member 300, can be oriented in assembling, to improve concentricity.Nut 80
Stop assembly 90 is provided on periphery, for controlling the stroke up and down of needle.Screw component 60 and nut 80 by thread fitting,
Magnet rotor 70 is rotated by the driving force of electromagnetic coil, and the screw being fixedly connected with magnet rotor component 60 is driven to rotate together,
Under the action of screw thread pair between nut 80 and screw component 60, screw component 60 is while rotating also relative to nut 80
Make elevating movement, and then drive needle component 50 closer or far from valve port portion 10a, to realize the tune to the flow of valve port portion 10a
Section.
It can not be detached from, but can perform relative motion between sleeve part 530 and screw component 60.Disengaging as described herein is
It is separated between fingerstall canister portion 530 and screw 60 each other without two separate parts of any restrictions, and refers not only to the two and do not have
There is contact physically.
In present embodiment, the surface at least one of both needle portion 510 and valve port portion 110 increases lubricant coating.It applies
The ingredient of layer is identical with first embodiment, that is, the record in the description of first embodiment about coating is adapted to this implementation
The technical solution of mode.It will be understood by those skilled in the art that the structure of present embodiment obviously can also generate identical technology
Effect.
The term positions such as upper and lower, left and right as described herein are described with Fig. 1 or shown in Fig. 4 reference views,
It should not be interpreted as the limitation to the utility model.The prefixes such as " first " as described herein, " second " are for convenient for area
Departmentalism part and the naming method introduced, itself does not generate each component the constraint of any restrictions.
Electric expansion valve provided by the utility model is described in detail above.Specific case used herein
The principle and embodiment of the utility model is expounded, the explanation of above example is only intended to help to understand this practicality
Novel method and its core concept.It should be pointed out that for those skilled in the art, this reality is not being departed from
Under the premise of with new principle, can also to the utility model, some improvement and modification can also be carried out, these improvement and modification are also fallen into
In the protection domain of the utility model claims.
Claims (6)
1. electric expansion valve, which is characterized in that including：
Valve seat and with the fixed valve core case of the valve seat, the valve core case offers valve port portion；
Needle component, the needle component include sleeve part and needle portion；
Both the valve port portion and the needle portion surface of at least one are coated with lubricant coating.
2. electric expansion valve as described in claim 1, which is characterized in that the needle portion includes first conical surface, the valve port
Portion includes sealing tapering, and first conical surface and/sealing tapering are coated with lubricant coating.
3. electric expansion valve as claimed in claim 2, which is characterized in that the needle portion further includes second conical surface, the valve
Oral area further includes straight section portion, and second conical surface and/straight section portion surface are coated with lubricant coating.
4. electric expansion valve as claimed in claim 2 or claim 3, which is characterized in that be provided with and lead on the internal perisporium of the valve core case
To section, the periphery wall cooperation of the guide section and the sleeve part is oriented to, the guide section and/or periphery wall surface coating
There is lubricant coating.
5. electric expansion valve as described in claim 1, which is characterized in that the thickness of the coating is 5 μm~50 μm.
6. electric expansion valve, which is characterized in that including：
Valve seat, the valve seat machining form, and the valve seat offers valve port portion；
Guide member, the guide member are fixedly connected with the valve seat, and needle, nut are oriented to；
Needle component, the needle component include sleeve part and needle portion；
Both the valve port portion and the needle portion surface of at least one are coated with lubricant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721434111.9U CN207584048U (en) | 2017-11-01 | 2017-11-01 | Electric expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721434111.9U CN207584048U (en) | 2017-11-01 | 2017-11-01 | Electric expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207584048U true CN207584048U (en) | 2018-07-06 |
Family
ID=62730440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721434111.9U Active CN207584048U (en) | 2017-11-01 | 2017-11-01 | Electric expansion valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN207584048U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020038380A1 (en) * | 2018-08-21 | 2020-02-27 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN113685557A (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 |
| 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 |
| WO2023241114A1 (en) * | 2022-06-16 | 2023-12-21 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
-
2017
- 2017-11-01 CN CN201721434111.9U patent/CN207584048U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020038380A1 (en) * | 2018-08-21 | 2020-02-27 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| US11644118B2 (en) | 2018-08-21 | 2023-05-09 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve |
| CN113685557A (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 |
| 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 |
| WO2023241114A1 (en) * | 2022-06-16 | 2023-12-21 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
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