CN207470790U - A kind of electric expansion valve - Google Patents
A kind of electric expansion valve Download PDFInfo
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- CN207470790U CN207470790U CN201720916983.2U CN201720916983U CN207470790U CN 207470790 U CN207470790 U CN 207470790U CN 201720916983 U CN201720916983 U CN 201720916983U CN 207470790 U CN207470790 U CN 207470790U
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- sealing element
- valve
- elastic sealing
- valve head
- electric expansion
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Abstract
The utility model discloses a kind of electric expansion valves,Including valve body,Spring pocket is provided in valve body,Valve head is socketed in spring pocket,Running through in valve head has poppet shaft,The bottom of poppet shaft is connected with tabletting,Balance channel is formed between poppet shaft and valve head,The elastic element being socketed in poppet shaft is provided in balance channel,Spring pocket or valve head are equipped with elastic sealing element,When electric expansion valve is closed,Elastic sealing element,Spring pocket is sealed with valve head three,When electric expansion valve is opened,There are gaps between elastic sealing element and spring pocket or elastic sealing element and valve head,The utility model by during switch valve elastic sealing element without sealing,Only it is squeezed when closing valve and deforms upon and be sealed,So that the contact working method between elastic sealing element and valve head is intermittent,It prevents from wearing between elastic sealing element and spring pocket during switch valve,The service life of elastic sealing element can effectively be extended,Ensure the sealing performance of elastic sealing element.
Description
Technical field
The utility model belongs to expansion valve field, and in particular to a kind of electric expansion valve.
Background technology
Existing electric expansion valve as shown in Figure 1, sealing element (42) is set between spring pocket (3) and valve head (4), and always with
Spring pocket (3) and valve head (4) fit closely, and for ensuring the leakproofness between spring pocket (3) and valve head (4), therefore, work as switch
During valve, the rotor (23) for driving valve head (4) mobile needs to overcome the hermetic resistance of sealing element (42), usually used sealing element
(42) for O-ring seal, O-ring seal is doing dynamic sealing in use, starting friction power is larger, generally the 3 of the coefficient of kinetic friction
It is~4 times, relatively high to the requirement of rotor (23) output torque, in addition, during continuous switch valve moves back and forth, sealing element
(42) it can be worn, sealing element (42) friction coefficient occur and become larger, rotor (23) valve opening force is insufficient and because of sealing element (42)
It is damaged and occur internal leakage the problems such as, so as to cause product failure.
Utility model content
It is swollen that technical problem to be solved in the utility model is just to provide a kind of electronics of elastic sealing element service life length
Swollen valve.
In order to solve the above technical problems, the utility model adopts the following technical solution：A kind of electric expansion valve, including valve
Body is provided with spring pocket in valve body, is socketed with valve head in spring pocket, through having poppet shaft, the bottom connection of poppet shaft in valve head
There is tabletting, balance channel formed between poppet shaft and valve head, the elastic element being socketed in poppet shaft is provided in balance channel,
Spring pocket or valve head are equipped with elastic sealing element, and when electric expansion valve is closed, elastic sealing element, spring pocket and valve head three are close
Envelope, when electric expansion valve is opened, there are gaps between elastic sealing element and spring pocket or elastic sealing element and valve head.
Further, seal groove is provided at the top of valve head, elastic sealing element is located in seal groove, is provided in poppet shaft
Boss, boss are located at the top of valve head, and elastic sealing element is squeezed close to be formed between valve head and spring pocket by boss and valve head
Envelope.
Further, screw rod is connected at the top of poppet shaft, nut assembly, nut assembly and spring pocket are provided with outside screw rod
The first cavity is formed between top, the second cavity is formed between valve body and valve head, the lower part of valve port surrounds third cavity by valve body,
The first balance hole of connection balance channel and third cavity is provided in poppet shaft, connection balance channel is additionally provided in poppet shaft
With the second balance hole of the first cavity.
Further, spring pad is provided between elastic element and boss.
Further, spring pad includes the pushing part being located in balance channel and between elastic sealing element and boss
Limiting section, pushing part surround the endoporus for being arranged poppet shaft.
Further, the venting channels of several first cavitys of connection and balance channel are provided on spring pad.
Further, venting channels include the first air channel towards endoporus and the second air channel towards boss.
Further, liner is provided in seal groove, liner is positioned at the top of elastic sealing element.
Further, spring pad and liner are structure as a whole.
Further, spring pocket and the shaft section of pilot hole that valve head socket-connects are inverted trapezoidal.
Compared with prior art, the beneficial effects of the utility model are：
1st, by being equipped with elastic sealing element on spring pocket or valve head, when electric expansion valve is closed, elastic sealing element exists
Sealing is formed between spring pocket and valve head, when electric expansion valve is opened, elastic sealing element and spring pocket or elastic sealing element and
There are gaps between valve head, the shortcomings that overcoming existing O-ring seal starting friction power larger and influence valve opening, reduce and drive valve
The output torque performance of the rotor part of mandrel rotation so that the contact working method between elastic sealing element and valve head is interval
Formula can effectively extend the service life of elastic sealing element, ensure the sealing performance of elastic sealing element.
When the 2nd, closing expansion valve, poppet shaft, valve head and tabletting move downwardly together, and elastic sealing element is located at seal groove at this time
In, it is not affixed with spring pocket, prevents from wearing between spring pocket and elastic sealing element, when valve head offsets with valve port, valve head
Stopping moves down, and poppet shaft continues to move down, and the elastic sealing element in seal groove is pressed down against, and then compresses bullet
Property sealing element, and make elastic sealing element that deformation radially occur, and be bonded with the inner wall sealing of the pilot hole of spring pocket, to valve
It is sealed between head and spring pocket, when expansion valve is opened, because of the effect of elastic element, poppet shaft first moves upwards, boss
Elastic sealing element is no longer compressed, discharges seal radial decrement, elastic sealing element resets, and prevents elastic sealing element and spring pocket
Between abrasion, contact working method between elastic sealing element and valve head is intermittent, can effectively extend the use of elastic sealing element
Service life ensures the sealing performance of elastic sealing element；Elastic sealing element is without sealing during switch valve simultaneously, further
Reduce the output torque performance for the rotor part for driving poppet shaft rotation, it is ensured that the switch valve performance of expansion valve, and will be elastic
Sealing element is arranged in the seal groove at the top of valve head so that the installation of elastic sealing element is easier.
3rd, when expansion valve is closed, valve head closes valve port, by elastic sealing element between the top of valve head and spring pocket
Sealing so that the second cavity formed between valve head and spring pocket is not connected with the first cavity, while the second cavity and third
Cavity does not also connect, and refrigerant enters balance channel from third cavity through the first balance hole, then enters first through the second balance hole
Cavity so that the refrigerant of the first cavity and third cavity can be penetrated through by balance channel, it is ensured that valve head both ends refrigerant pressure one
It causes, and effective active area is identical, preventing the first cavity and third cavity, there are pressure differentials, it is ensured that two chambers up and down of valve head
Body pressure balance improves the valve opening force of expansion valve.
4th, spring pad separates elastic element and boss, prevents boss from elastic element being driven to rotate and lead together when rotating
Elastic element distortion is caused, while prevents from wearing between the boss and elastic element in the poppet shaft rotated, extends poppet shaft
With the service life of elastic element.
5th, spring pad separates elastic sealing element and boss by limit part so that elastic sealing element with it is convex in poppet shaft
Platform mediate contact can greatly reduce abrasion of the radial rotary power of poppet shaft to elastic sealing element, extend making for elastic sealing element
With the service life, the sealing performance of elastic sealing element is improved.
6th, by setting venting channels on spring pad, the second balance hole on alternative boss is cold in balance channel
Matchmaker enters the first cavity from venting channels through the gap between boss and spring pocket, without opening up the second balance hole on boss,
The difficulty of processing of the boss in poppet shaft is reduced, reduces the production and processing cost of poppet shaft；By the setting of multiple venting channels,
So that the ventilatory effect of the first cavity and balance channel is more preferable.
7th, the first air channel being located on endoporus side wall and the second air channel being located at the top of limiting section while ventilation,
The contact area between poppet shaft and spring pad is reduced, when poppet shaft rotates, reduces abrasion of the poppet shaft for spring pad
Area extends the service life of spring pad.
8th, in a ring, the clearance fit between valve head is set in seal groove liner, can be moved on valve head, is padded bullet
Spring pad and elastic sealing element are separated, and spring pad squeezes elastic sealing element by liner, prevents elastic sealing element by spring pad
It is crushed with the joint place of valve head, extends the service life of elastic sealing element.
9th, spring pad and liner are become one structure, i.e., spring pad sectional view is in inverse u shape, and liner and valve head form close
Sealing groove squeezes elastic sealing element jointly, is ensureing the elastic sealing element service life simultaneously, is further reducing the processing of spring pad and liner
Cost reduces the installation difficulty of spring pad and liner, reduces the production, installation and maintenance cost of electric expansion valve.
10th, when electric expansion valve close valve when, valve head by the promotion of poppet shaft from the top of pilot hole to pilot hole under
Fang Yidong, the gap between valve head outer wall and spring pocket are gradually reduced, the elastic sealing element on valve head because valve head and spring pocket it
Between gap reduce and gradually compressed, until when valve is fully closed, the decrement of elastic sealing element is maximum, elastic sealing element to valve head and
Gap between spring pocket is sealed；When valve opening, valve head is by the pulling of poppet shaft from the lower section of pilot hole to pilot hole
Top movement, the gap between valve head outer wall and spring pocket gradually increases, and the elastic sealing element on valve head is because of valve head and spring
Gap between set increases and is gradually released, until during valve standard-sized sheet, elastic sealing element prevents elastic packing in no compressive state
As the mobile of elastic sealing element is worn between part and spring pocket.
Compared with prior art, the utility model is by the way that elastic sealing element is without sealing during switch valve, only
It is squeezed when closing valve and deforms upon and be sealed so that the contact working method between elastic sealing element and valve head is interval
Formula prevents from wearing between elastic sealing element and spring pocket during switch valve, can effectively extend elastic sealing element
Service life ensures the sealing performance of elastic sealing element.
Description of the drawings
The utility model is further described with reference to the accompanying drawings and detailed description：
Fig. 1 is the schematic diagram of the prior art；
Fig. 2 is the schematic diagram of embodiment one；
Fig. 3 is poppet shaft, valve head and the assembling schematic diagram of tabletting in embodiment one；
Fig. 4 is poppet shaft, valve head and the assembling schematic diagram of tabletting in embodiment two；
Fig. 5 is the schematic diagram of the spring pad in embodiment two；
Fig. 6 is the schematic diagram of embodiment three；
Fig. 7 is the schematic diagram of example IV；
Fig. 8 is the spring pad schematic diagram in example IV；
Fig. 9 is the schematic diagram of the spring pocket in embodiment five.
Wherein：1st, valve body；11st, the first cavity；12nd, the second cavity；13rd, third cavity；2nd, housing；21st, nut assembly；
22nd, screw rod；23rd, rotor part；3rd, spring pocket；31st, pilot hole；4th, valve head；41st, seal groove；42nd, elastic sealing element；5th, spool
Axis；51st, boss；511st, the second balance hole；52nd, balance channel；53rd, elastic element；54th, the first balance hole；6th, tabletting；7th, spring
Pad；71st, pushing part；72nd, limiting section；73rd, venting channels；731st, the first air channel；732nd, the second air channel；8th, it pads；9th, valve
Mouthful.
Specific embodiment
With reference to Fig. 2 to Fig. 9, to the utility model, a kind of embodiment of electric expansion valve is described further.
Embodiment one：
A kind of electric expansion valve including valve body 1, connect the housing 2 to form valve chamber with valve body 1, fixation is provided in valve body 1
Spring pocket 3 on valve body 1, is socketed with valve head 4 in spring pocket 3, and through there is poppet shaft 5 in valve head 4, the bottom of poppet shaft 5 connects
Tabletting 6 is connected to, the nut assembly 21 being fixedly connected with spring pocket 3, the spiral shell being rotatablely connected with nut assembly 21 are provided in valve chamber
Bar 22 and the rotor part 23 being fixedly connected with screw rod 22, the top of poppet shaft 5 are connected with screw rod 22, nut assembly 21 and spring
Set forms the first cavity 11 between 3 top, the second cavity 12 is formed between valve body 1 and valve head 4, the lower part of valve port 9 is enclosed by valve body 1
Into third cavity 13, balance channel 52 is formed between poppet shaft 5 and valve head 4, is provided in balance channel 52 and is socketed in poppet shaft 5
On elastic element 53, be provided with boss 51 in poppet shaft 5, boss 51 is located at the top of valve head 4, the top of boss 51 and spring
Set 3 offsets, and the top of valve head 4 is provided with seal groove 41, is provided in seal groove 41 and is outwardly protruded by boss 51 and the extruding of valve head 4
The inner wall of spring pocket 3 is resisted to form the elastic sealing element 42 of sealing between valve head 4 and spring pocket 3, elastic element 53 and convex
Spring pad 7 is provided between platform 51, spring pad 7 is located in balance channel 52, and section is square, and connection is provided in poppet shaft 5
First balance hole 54 of balance channel 52 and third cavity 13 is provided with connection 52 and first cavity 11 of balance channel on boss 51
The second balance hole 511.
When closing expansion valve, rotor is rotated under the driving of external coil, and rotor part 23 passes torque to spiral shell
Bar 22 drives screw rod 22 to rotate, and the convert rotational motion of screw rod 22 is straight by the screw thread side effect of screw rod 22 and nut assembly 21
Line moves, and so as to which poppet shaft 5, valve head 4 and tabletting 6 be pushed to move downwardly together, elastic sealing element 42 is located at seal groove 41 at this time
In, it is not affixed with spring pocket 3, prevents from wearing between spring pocket 3 and elastic sealing element 42, when valve head 4 and valve port 9 offset
When, the stopping of valve head 4 moves down, and poppet shaft 5 continues to move down, and the elastic sealing element 42 in seal groove 41 is squeezed downwards
Pressure, and then elasticity of compression sealing element 42, and elastic sealing element 42 is made to occur deformation radially, and with the pilot hole of spring pocket 3
31 inner wall sealing fitting, is sealed between valve head 4 and spring pocket 3, when expansion valve is opened, because of the work of elastic element 53
With poppet shaft 5 first moves upwards, and boss 51 no longer compresses elastic sealing element 42, discharges seal radial decrement, elastic packing
Part 42 resets, and prevents the abrasion between elastic sealing element 42 and spring pocket 3, the contact work side between elastic sealing element 42 and valve head 4
Formula is intermittent, can effectively extend the service life of elastic sealing element 42, ensures the sealing performance of elastic sealing element 42；Exist simultaneously
Elastic sealing element 42 further reduces the output torque performance of rotor part 23 without sealing during switch valve, it is ensured that
The switch valve performance of expansion valve, and elastic sealing element 42 is arranged in the seal groove 41 at 4 top of valve head so that elastic packing
The installation of part 42 is easier.
Embodiment two：
Using spring pad 7 include the pushing part 71 being located in balance channel 52 and positioned at elastic sealing element 42 and boss 51 it
Between limiting section 72, section be in inverted " L " type, pushing part 71 surrounds the endoporus for being arranged poppet shaft 5, is provided on spring pad 7
The venting channels 73 of the first cavity 11 of multiple connections and balance channel 52, venting channels 73 include the first air channel towards endoporus
731 and it is located at balance channel 52 towards the spring pad 7 in the technical characteristic alternate embodiment one of the second air channel 732 of boss 51
In, section is square, and the second balance hole 511 of connection 52 and first cavity 11 of balance channel, remaining skill are provided on boss 51
Art feature is identical with embodiment one.
Spring pad 7 separates elastic sealing element 42 and boss 51 by limiting section 72 so that elastic sealing element 42 and spool
51 mediate contact of boss on axis 5 can greatly reduce abrasion of the radial rotary power of poppet shaft 5 to elastic sealing element 42, extend
The service life of elastic sealing element 42 improves the sealing performance of elastic sealing element 42；By setting the first ventilation on spring pad 7
731 and second air channel 732 of slot substitutes the second balance hole 511 on boss 51, reduces the processing of the boss 51 in poppet shaft 5
Difficulty reduces the production and processing cost of poppet shaft 5；By the setting of multiple first air channel, 731 and second air channels 732, make
The ventilatory effect for obtaining the first cavity 11 and balance channel 52 is more preferable, while 731 and second air channel 732 of multiple first air channels subtracts
Small contact area between poppet shaft 5 and spring pad 7 when poppet shaft 5 rotates, reduces mill of the poppet shaft 5 for spring pad 7
Area is damaged, extends the service life of spring pad 7.
Embodiment three：
The difference lies in be provided with liner 8, liner 8 is located at elasticity to the present embodiment with embodiment two in seal groove 41
Between sealing element 42 and boss 51, liner 8 and spring pad 7 are separately set.
Liner 8 in a ring, with 4 clearance fits of valve head, is set in seal groove 41, can be moved on valve head 4, liner 8
Spring pad 7 and elastic sealing element 42 are separated, spring pad 7 squeezes elastic sealing element 42 by liner 8, prevents elastic packing
Part 42 is crushed by the joint place of spring pad 7 and valve head 4, extends the service life of elastic sealing element 42.
Example IV：
The difference lies in spring pad 7 and liner 8 are integrally formed the present embodiment, spring pad 7 and lining with embodiment three
The technique of pad 8 is injection molding.
Spring pad 7 and liner 8 are become one structure by injection molding, i.e., 7 sectional view of spring pad is in inverse u shape, is served as a contrast
Pad 8 and valve head 4 form seal groove 41 and squeeze elastic sealing element 42 jointly, are ensureing 42 service life of elastic sealing element simultaneously, further
The processing cost of spring pad 7 and liner 8 is reduced, the installation difficulty of spring pad 7 and liner 8 is reduced, reduces the life of electric expansion valve
Production, installation and maintenance cost.
Embodiment five：
The present embodiment provides a kind of electric expansion valve, elastic sealing element 42 is arranged on valve head 4, and spring pocket 3 is enabled to be socketed with
The hole of valve head 4 is pilot hole 31, and the axial section shape of pilot hole 31 is inverted isosceles trapezoid, the side wall and guiding of pilot hole 31
Angle between the central axes of hole is A, 0 °<A.
When electric expansion valve closes valve, valve head 4 is by the promotion of poppet shaft 5 from the top of pilot hole 31 to pilot hole 31
Lower section is moved, and the gap between 4 outer wall of valve head and spring pocket 3 is gradually reduced, the elastic sealing element 42 on valve head 4 because valve head 4 with
Gap between spring pocket 3 reduces and is gradually compressed, until when valve is fully closed, the decrement of elastic sealing element 42 is maximum, and elasticity is close
Gap of the sealing 42 between valve head 4 and spring pocket 3 is sealed；When valve opening, valve head 4 is by the pulling of poppet shaft 5 from leading
It is moved to the lower section in hole 31 to the top of pilot hole 31, the gap between 4 outer wall of valve head and spring pocket 3 gradually increases, on valve head 4
Elastic sealing element 42 be gradually released due to the gap increase between valve head 4 and spring pocket 3, until during valve standard-sized sheet, elastic packing
Part 42 is prevented between elastic sealing element 42 and spring pocket 3 in no compressive state as the mobile of elastic sealing element 42 is ground
Damage.
The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical solutions belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, several improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of electric expansion valve including valve body, is provided with spring pocket, valve head is socketed in spring pocket, is passed through in valve head in valve body
Poppet shaft is installed with, the bottom of poppet shaft is connected with tabletting, forms balance channel between the poppet shaft and valve head, in balance channel
It is provided with the elastic element being socketed in poppet shaft, it is characterised in that：The spring pocket or the valve head are equipped with elastic packing
Part, when the electric expansion valve is closed, the elastic sealing element, spring pocket and valve head three seal, when the electronic expansion
When valve is opened, there are gaps between the elastic sealing element and spring pocket or the elastic sealing element and valve head.
2. a kind of electric expansion valve according to claim 1, it is characterised in that：Sealing is provided at the top of the valve head
Slot, the elastic sealing element are located in seal groove, boss are provided in the poppet shaft, boss is located at the top of valve head, described
Elastic sealing element is squeezed by boss and valve head and is sealed with being formed between valve head and spring pocket.
3. a kind of electric expansion valve according to claim 2, it is characterised in that：Spiral shell is connected at the top of the poppet shaft
Bar, is provided with nut assembly outside screw rod, at the top of nut assembly and spring pocket between form the first cavity, the valve body and valve head it
Between form the second cavity, the lower part of valve port surrounds third cavity by valve body, be provided in the poppet shaft connection balance channel and
First balance hole of third cavity is additionally provided with the second balance hole of connection balance channel and the first cavity in the poppet shaft.
4. a kind of electric expansion valve according to claim 3, it is characterised in that：It is set between the elastic element and boss
There is spring pad.
5. a kind of electric expansion valve according to claim 4, it is characterised in that：The spring pad includes being located at balance channel
In pushing part and the limiting section between elastic sealing element and boss, the pushing part surround the endoporus for being arranged poppet shaft.
6. a kind of electric expansion valve according to claim 5, it is characterised in that：Several companies are provided on the spring pad
The venting channels of logical first cavity and balance channel.
7. a kind of electric expansion valve according to claim 6, it is characterised in that：The venting channels are included towards described interior
First air channel in hole and the second air channel towards boss.
8. a kind of electric expansion valve according to any one of claims 1 to 7, it is characterised in that：It is set in the seal groove
There is liner, liner is positioned at the top of elastic sealing element.
9. a kind of electric expansion valve according to claim 8, it is characterised in that：The spring pad and liner are integrated knot
Structure.
10. a kind of electric expansion valve according to claim 1, it is characterised in that：What the spring pocket socket-connected with valve head
The shaft section of pilot hole is inverted trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916983.2U CN207470790U (en) | 2017-07-26 | 2017-07-26 | A kind of electric expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916983.2U CN207470790U (en) | 2017-07-26 | 2017-07-26 | A kind of electric expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207470790U true CN207470790U (en) | 2018-06-08 |
Family
ID=62256161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720916983.2U Active CN207470790U (en) | 2017-07-26 | 2017-07-26 | A kind of electric expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207470790U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873193A (en) * | 2018-08-29 | 2020-03-10 | 盾安环境技术有限公司 | Electronic expansion valve |
| WO2020233338A1 (en) * | 2019-05-20 | 2020-11-26 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| WO2020248759A1 (en) * | 2019-06-14 | 2020-12-17 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| JP7419250B2 (en) | 2018-08-21 | 2024-01-22 | 浙江盾安人工環境股▲ふん▼有限公司 | electronic expansion valve |
-
2017
- 2017-07-26 CN CN201720916983.2U patent/CN207470790U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7419250B2 (en) | 2018-08-21 | 2024-01-22 | 浙江盾安人工環境股▲ふん▼有限公司 | electronic expansion valve |
| CN110873193A (en) * | 2018-08-29 | 2020-03-10 | 盾安环境技术有限公司 | Electronic expansion valve |
| CN110873193B (en) * | 2018-08-29 | 2022-05-13 | 盾安环境技术有限公司 | Electronic expansion valve |
| WO2020233338A1 (en) * | 2019-05-20 | 2020-11-26 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| US20220205694A1 (en) * | 2019-05-20 | 2022-06-30 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic Expansion Valve |
| JP2022532973A (en) * | 2019-05-20 | 2022-07-21 | 浙江盾安人工環境股▲ふん▼有限公司 | Electronic expansion valve |
| JP7214883B2 (en) | 2019-05-20 | 2023-01-30 | 浙江盾安人工環境股▲ふん▼有限公司 | electronic expansion valve |
| US11953244B2 (en) * | 2019-05-20 | 2024-04-09 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve |
| WO2020248759A1 (en) * | 2019-06-14 | 2020-12-17 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| KR20210142206A (en) * | 2019-06-14 | 2021-11-24 | 제지앙 둔안 아트피셜 인바이런먼트 컴퍼니 리미티드 | electronic expansion valve |
| EP3957882A4 (en) * | 2019-06-14 | 2023-01-04 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve |
| KR102596287B1 (en) | 2019-06-14 | 2023-10-31 | 제지앙 둔안 아트피셜 인바이런먼트 컴퍼니 리미티드 | electronic expansion valve |
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