CN109520183A - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN109520183A CN109520183A CN201710842133.7A CN201710842133A CN109520183A CN 109520183 A CN109520183 A CN 109520183A CN 201710842133 A CN201710842133 A CN 201710842133A CN 109520183 A CN109520183 A CN 109520183A
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- CN
- China
- Prior art keywords
- valve
- needle
- nut
- screw rod
- electric expansion
- 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.)
- Withdrawn
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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
电子膨胀阀，包括：阀座组件，所述阀座组件包括阀座，所述阀座具有阀腔，并且开设有阀口；丝杆阀针组件，所述丝杆阀针组件包括丝杆、阀针以及套筒部，所述丝杆与所述阀针通过套筒部实现浮动连接；所述阀针与阀口配合以对所述电子膨胀阀进行流量调节；螺母组件，所述螺母组件包括螺母以及连接片，所述螺母与所述丝杆通过螺纹配合，所述螺母的下部设置有螺母导向部；磁转子组件，所述磁转子组件包括磁转子部件以及与所述磁转子部件固定连接的连接板，所述连接板与所述丝杆固定连接；外壳组件，所述外壳组件包括与所述阀座固定连接的罩盖、与所述罩盖固定连接的外壳；引导部件，所述引导部件与所述阀座固定连接，同时对所述套筒部和所述阀针进行导向。The electronic expansion valve includes: a valve seat assembly, the valve seat assembly includes a valve seat, the valve seat has a valve cavity, and a valve port is opened; a screw valve needle assembly, the screw valve needle assembly includes a screw rod, The valve needle and the sleeve part, the screw rod and the valve needle realize a floating connection through the sleeve part; the valve needle cooperates with the valve port to regulate the flow of the electronic expansion valve; the nut assembly, the nut assembly It includes a nut and a connecting piece, the nut is threadedly matched with the screw rod, and a nut guide is provided at the lower part of the nut; a magnetic rotor assembly, the magnetic rotor assembly includes a magnetic rotor component and is fixed to the magnetic rotor component The connected connecting plate, the connecting plate is fixedly connected with the screw rod; the casing assembly, the casing assembly includes a cover fixedly connected with the valve seat, and a casing fixedly connected with the cover; a guide part, the The guide member is fixedly connected with the valve seat, and simultaneously guides the sleeve part and the valve needle.
Description
Technical field
The present invention relates to fluid control component technical field, in particular to a kind of electric expansion valve.
Background technique
In cooling and warming technical field, electric expansion valve is the cold medium flux control unit of heating-cooling equipment, work
Process is general are as follows: and with the energization or power-off of the coil device as stator, the magnetic rotor component as rotor is driven to rotate, with
Magnet rotor is fixedly connected and the screw rod for following magnet rotor to rotate drives valve needle movements, is provided with nut part in electric expansion valve,
Nut part is provided with internal thread structure, correspondingly, external thread structure is provided on screw rod, by the cooperation of screw thread pair,
Screw rod 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 realize system function and achieve the purpose that accurately to control.
Electric expansion valve in refrigeration systems in use, the pressure of vibration and the refrigerant pulse of compressor, can to needle or
Screw rod brings certain impact；Affect the concentricity between each component, needle deflection, thus cause screw thread pair abrasion and
The abrasion at valve port position, and while above-mentioned abrasion also a kind of pair of needle reality how can be designed along with the generation of noise, therefore
While existing effect is oriented to, the electronic expansion valve structure that component causes inordinate wear because of deflection can be reduced, is art technology
Personnel's technical problem urgently to be resolved.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of electric expansion valve, which can be to needle component
Realize good guiding, for this purpose, the invention adopts the following technical scheme:
Electric expansion valve characterized by comprising
Valve component, the valve component include valve seat, and the valve seat has valve chamber, and offers valve port；
Screw rod needle component, the screw rod needle component include screw rod, needle and sleeve part, the screw rod and the valve
Needle realizes floating connection by sleeve part；The needle and valve port cooperate to carry out flow adjusting to the electric expansion valve；
Nut assembly, the nut assembly include nut and connection sheet, and the nut is matched with the screw rod by screw thread
It closes, the lower part of the nut is provided with nut guide part；
Magnetic rotor component, the magnetic rotor component include magnetic rotor component and are fixedly connected with the magnetic rotor component
Connecting plate, the connecting plate are fixedly connected with the screw rod；
Casing assembly, the casing assembly include the cover being fixedly connected with the valve seat, are fixedly connected with the cover
Shell；
Guide member, the guide member are fixedly connected with the valve seat, at the same to the sleeve part and the needle into
Row guiding.
As the further supplement to above-mentioned complete technical solution, can also the relevant art feature to the technical solution make
Following transformation or refinement out:
The valve seat is directly or indirectly fixed with the first connecting tube and the second connecting tube, first connecting tube, valve port,
Two connecting tubes form refrigerant circulation passage.
End plate is provided at the top of the sleeve part, the lower end of the screw rod is fixedly connected with boss, the boss
It is provided with boss thrust face, the end plate is provided with end plate thrust face, the boss thrust face and the end plate thrust face pair
To setting.
It is provided with spring below the boss, and is supported by support member.
The first gasket is provided with below the support member, first gasket is abutted against with the needle.
The nut and institute's connection sheet integrated injection molding, the connection sheet are welded and fixed with the cover.
The valve seat is provided with valve seat inner hole, and the guide member is provided with the first outer edge, first outer edge with
The valve seat inner hole is fixed, and the guide member is provided with the second outer edge, and second outer edge is led with the nut
Cooperate to portion and fixes.
The guide member is provided with sleeve steering portion, the outer diameter phase of the internal diameter and the sleeve part in the sleeve steering portion
It adapts to, the sleeve part is oriented to.
The guide member is additionally provided with needle guide portion, the outer diameter phase of the internal diameter and the needle of the needle guide portion
It adapts to, the needle is oriented to.
It is located within the valve chamber to the lower end portion of the guide member.High pressure refrigerant can be prevented from the first connection
When pipe enters, strong impact will not be caused to needle, further prevents needle to swing, reduces abrasion and noise.
Electric expansion valve provided by the invention, is provided with guide member, which can be simultaneously to needle and sleeve
Portion is oriented to, can be effectively prevented needle and sleeve part radial deflection and caused by inordinate wear, improve the dynamic of product
Make reliability；Simultaneously because needle will not be abnormal deflection and be abnormal abrasion with valve port, while also reducing noise.
Detailed description of the invention
Fig. 1 is electronic expansion valve structure schematic views provided by the invention；
Fig. 2 is electric expansion valve guide member structural schematic diagram provided by the invention；
Fig. 3 is electric expansion valve valve seat construction schematic diagram provided by the invention.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art more fully understand technical solution 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.
Electric expansion valve has valve seat 1, and valve seat 1 can be shaped using metal cutting process, and be 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 cooperated with needle 5, changes the circulating face between valve port 1c and needle 5
Product, to realize the accurate adjusting of flow.Valve seat 1 and the first connecting tube 2, the second connecting tube 3 constitute valve component.First connects
Adapter tube 2, valve port 1c, the second connecting tube 3 are formed refrigerant circulation passage.Refrigerant can be flowed into from the first connecting tube 2, flow through valve
Mouth 1c, flows out from the second connecting tube 3, can also flow into from the second connecting tube 3, flow through valve port 1c, flows out from the first connecting tube 2.
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, stage portion 1d can be arranged 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, shell 15 can be fixed with the cover 4 by the way of welding,
In this way, being formed relatively closed space between shell 15, the cover 4, valve seat 1, and pass through the first connecting tube 2 and the second connection
Pipe 3 carries out the circulation of refrigerant and the adjusting of flow.Shell 15 and the cover 4 constitute casing assembly.
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 the signal as the coil component of stator and rotate.Screw rod 16 is turned by connecting plate 17 and magnetic
Subassembly 14 is fixedly connected as an entirety, and specifically, screw rod 16 can be used with connecting plate 17 and is welded and fixed, magnetic rotor component
14 can be directly injection-moulded on connecting plate 17.Wherein, magnetic rotor component 14 and connecting plate 17 constitute magnetic rotor component.
Screw rod needle component includes screw rod 16, needle 5 and sleeve part 25, passes through sleeve part between screw rod 16 and needle 5
25 realize floating connections, and sleeve part 25 is substantially cup-shaped, and opening arranged at bottom, and needle 5 passes through the opening, into valve chamber in and valve
Mouth is in contact or separates.That is, needle 5 can be with relative sleeve portion 25 in certain stroke in the electric expansion valve course of work
It moves up and down, but the limitation of sleeve part 25 can not be detached from.The top of sleeve 25 is provided with end plate 10, end plate 10 is provided with
End plate thrust face 10a, the lower end of screw rod 16 are fixedly connected with boss 9, and boss thrust face 9a is provided on boss 9, is being assembled
When, be put into the inner space of sleeve part 25 after being first fixedly connected with boss 9 with screw rod 16, then again by end plate 10 with
Sleeve part 25 is fixed using the such as modes such as welding.In this way, boss thrust face 9a and end plate thrust face 10a form opposite direction
Setting, and at the same time sleeve part 25 is suspended on screw rod 16.It can not be detached between sleeve part 25 and screw rod 16, but phase can be made
To movement.Disengaging as described herein refers to two lists that not any restrictions are separated into each other between sleeve part 25 and screw rod 16
Only component, and refer not only to the contact of the two not physically.
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 by support portion
Part 24 is supported, and the lower section of support member 24 is additionally provided with the first gasket 26, and the first gasket 26 is abutted against with needle 5.Needle 5
The second gasket 27 is additionally provided between sleeve part 25, so that needle 5 be made to be suspended on sleeve part 25.
Nut 11 is fixed in the space that shell 15 is surrounded with the cover 4 by metal connection sheet 18.Specifically,
Nut 11 can be shaped using nonmetallic materials and 18 integrated injection molding of connection sheet, and connection sheet 18 and the cover 4 are passed through welding
Mode is fixedly connected.I.e., it is possible to be put into mold using metal connection sheet as an inserts, pass through the hands such as injection molding
Section molds nut 11 in connection sheet.Nut 11 and connection sheet 18 just constitute nut assembly.
Nut 11 have along its axially through through-hole, and the inside of the through-hole be arranged internal screw thread 11a, correspondingly
, one section of external thread part 16a is provided on the outer peripheral surface of screw rod 16, in this way when magnetic rotor component 14 rotates, therewith
The screw rod 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 close to 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 inner hole 1a, and is connected with valve chamber 1b.In valve seat
Hole 1a can be formed by way of machining.It is equipped with guide member 30 with valve seat inner hole 1a, guide member 30 is big
Body is cylindrical in shape, and in a kind of specific embodiment, outer 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 greater than the outer diameter of the second outer edge 30d, the first outer edge 30a be used for valve seat inner hole 1a into
Row cooperation fix, specifically can using interference be press-fitted by the way of or welding mode.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 guarantee 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 greater than the
The outer diameter of two outer edge 30d is internal diameter design of the internal diameter based on valve seat inner hole 1a greater than nut pilot hole 11c and is determined,
As equivalent alternative, the internal diameter of valve seat inner hole 1a can also be set smaller than to the internal diameter of nut pilot hole 11c, only
Such set-up mode will 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, provide good guiding 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, and allows the outer edge surface edge of sleeve part 25
Sleeve steering portion 30c move freely, provide good guiding and radial support to sleeve part 25 by sleeve steering portion 30c,
Prevent the swing due to sleeve part 25 and and cause the anomalous swing of screw rod 26, cause so as to cause the shaking of 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 inner hole 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 adapter tube 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.
It should be noted that guide member 30 can use integrated material machine-shaping, can also use split type
Structure is assembled, such as close-fitting, welding mode be connected as one it is indivisible whole in the course of work of electric expansion valve
Body.Obviously, guide member made of the split type assembling parts has basic phase with guide member made of molding is integrally machined
Same technological means, can be realized essentially identical technical effect.
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, method of the invention that the above embodiments are only used to help understand 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 (10)
1. electric expansion valve characterized by comprising
Valve component, the valve component include valve seat (1), and the valve seat (1) has valve chamber (1b), and offers valve port
(1c)；
Screw rod needle component, the screw rod needle component include screw rod (16), needle (5) and sleeve part (25), the screw rod
(16) floating connection is realized by sleeve part (25) with the needle (5)；The needle (5) cooperates with valve port (1c) to described
Electric expansion valve carries out flow adjusting；
Nut assembly, the nut assembly include nut (11) and connection sheet (18), the nut (11) and the screw rod
(16) by being threadedly engaged, the lower part of the nut (11) is provided with nut guide part (11c)；
Magnetic rotor component, the magnetic rotor component include magnetic rotor component (14) and fix company with the magnetic rotor component (14)
The connecting plate (17) connect, the connecting plate (17) are fixedly connected with the screw rod (16)；
Casing assembly, the casing assembly include that the cover (4) being fixedly connected with the valve seat (1) and the cover (4) are fixed
The shell (15) of connection；
Guide member (30), the guide member (30) are fixedly connected with the valve seat (1), at the same to the sleeve part (25) and
The needle (5) is oriented to.
2. electric expansion valve as described in claim 1, which is characterized in that the valve component further includes and the valve seat (1)
Directly or indirectly it is fixed with the first connecting tube (2) and the second connecting tube (3), first connecting tube (2), valve port (1c), second
Connecting tube (3) forms refrigerant circulation passage.
3. 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 screw rod (16) is fixedly connected with boss (9), and the boss (9) is provided with boss thrust face (9a), institute
It states end plate to be provided with end plate thrust face (10a), the boss thrust face (9a) sets with end plate thrust face (10a) opposite direction
It sets.
4. electric expansion valve as claimed in claim 3, which is characterized in that it is provided with spring (8) below the boss (9), and
It is supported by support member (24).
5. electric expansion valve as claimed in claim 4, which is characterized in that be provided with first below the support member (24)
Gasket (26), first gasket (26) abut against with the needle (5).
6. electric expansion valve as described in claim 1, which is characterized in that the nut (11) and institute's connection sheet (18) are integrally infused
It is moulded into type, the connection sheet (18) is welded and fixed with the cover (4).
7. electric expansion valve as described in claim 1, which is characterized in that the valve seat (1) is provided with valve seat inner hole (1a), institute
It states guide member (30) to be provided with the first outer edge (30a), first outer edge (30a) and the valve seat inner hole (1a) cooperate
Fixed, the guide member (30) is provided with the second outer edge (30d), and second outer edge (30d) and the nut are oriented to
Portion (11c) cooperation is fixed.
8. electric expansion valve as described in claim 1, which is characterized in that the guide member (30) is provided with sleeve steering portion
(30c), the internal diameter of the sleeve steering portion (30c) and the outer diameter of the sleeve part (25) are adapted, to the sleeve part (25)
It is oriented to.
9. electric expansion valve as described in claim 1, which is characterized in that the guide member (30) is additionally provided with needle guidance
Portion (30b), the internal diameter of the needle guide portion (30b) and the outer diameter of the needle (5) are adapted, and are carried out to the needle (5)
Guiding.
10. electric expansion valve as described in claim 1, which is characterized in that the lower end portion of the guide member (30)
Within the valve chamber (1b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710842133.7A CN109520183A (en) | 2017-09-18 | 2017-09-18 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710842133.7A CN109520183A (en) | 2017-09-18 | 2017-09-18 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109520183A true CN109520183A (en) | 2019-03-26 |
Family
ID=65769274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710842133.7A Withdrawn CN109520183A (en) | 2017-09-18 | 2017-09-18 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109520183A (en) |
Cited By (5)
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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 | Electronic expansion valve |
| CN111365911A (en) * | 2020-03-23 | 2020-07-03 | 浙江农林大学暨阳学院 | Expansion valve and automobile air conditioning system |
| CN112576800A (en) * | 2019-09-29 | 2021-03-30 | 浙江盾安禾田金属有限公司 | Electromagnetic three-way valve assembling method and electromagnetic three-way valve |
| CN112879574A (en) * | 2019-11-29 | 2021-06-01 | 浙江三花智能控制股份有限公司 | Valve device |
| WO2023143028A1 (en) * | 2022-01-28 | 2023-08-03 | 浙江盾安人工环境股份有限公司 | 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 | Electronic 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 |
| CN112576800A (en) * | 2019-09-29 | 2021-03-30 | 浙江盾安禾田金属有限公司 | Electromagnetic three-way valve assembling method and electromagnetic three-way valve |
| CN112576800B (en) * | 2019-09-29 | 2022-06-17 | 浙江盾安禾田金属有限公司 | Electromagnetic three-way valve assembling method and electromagnetic three-way valve |
| CN112879574A (en) * | 2019-11-29 | 2021-06-01 | 浙江三花智能控制股份有限公司 | Valve device |
| CN111365911A (en) * | 2020-03-23 | 2020-07-03 | 浙江农林大学暨阳学院 | Expansion valve and automobile air conditioning system |
| WO2023143028A1 (en) * | 2022-01-28 | 2023-08-03 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
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