CN102878730A - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
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- CN102878730A CN102878730A CN201210219195XA CN201210219195A CN102878730A CN 102878730 A CN102878730 A CN 102878730A CN 201210219195X A CN201210219195X A CN 201210219195XA CN 201210219195 A CN201210219195 A CN 201210219195A CN 102878730 A CN102878730 A CN 102878730A
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- valve seat
- electric expansion
- pipe
- valve
- valve body
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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
Abstract
The invention provides an electronic expansion valve comprising a valve body, a valve seat and a discharge connection pipe; a bottom wall of the valve body is downwards stretched so as to form an orifice which is matched with the valve seat; the depth of the orifice is larger than the thickness of the bottom wall of the valve body; the valve seat is sleeved in the orifice; the upper part of the valve seat is supported on the bottom wall of an inner layer while the lower part of the valve seat passes through the orifice; the discharge connection pipe is sleeved outside the orifice of the valve body; the valve body, the valve seat and the discharge connection pipe are welded by a welding ring which is arranged on the bottom end of the orifice of the valve body; a first guide slot is arranged on the outer surface of the valve seat, wherein the first guide slot is used for guiding a solder to seep to the bottom wall of the inner layer from the bottom end of the orifice, and the outer surface of the valve seat is matched with the orifice. With the adoption of the electronic expansion valve, the connecting stability of the valve seat is improved, and the rejection rate of the product is reduced.
Description
Technical field
The present invention relates to refrigerating field, be specifically related to a kind of electric expansion valve.
Background technology
Electric expansion valve is the principle of utilizing stepper motor, with the forward and reverse rotation of coil drive magnetic rotor component, and the rotating operation of magnetic rotor component is converted into moving up and down of screw mandrel, drive the needle that is attached thereto by screw mandrel and rise or descend, the uninterrupted of control electric expansion valve.
In the existing electric expansion valve, as shown in Figure 1, the diapire of valve body 100 is platy structure, be provided with the installing hole that holds valve seat 500 in the diapire of valve body 100, valve seat 500 is arranged in the installing hole, spool 1600 is arranged in the valve seat 500, valve seat 500 bottoms are stretched out the mouth of pipe downwards, discharge connection 900 is set in the valve seat bottom, entrance sleeve 800 is arranged on the side direction of valve body 100, valve seat 500, valve body 100 and discharge connection 900 are by being welded to connect, weld-ring 300 is placed on outside the discharge connection 900, and is far away apart from valve seat 500, and this structure has been just thought of the welding between valve body 100 and the discharge connection 900, and not with respect between valve seat 500 and the valve body 100 and the welding between valve seat 500 and the discharge connection 900, because the scolder seepage distance is far away, permeate inhomogeneously, cause between valve seat 500 and the valve body 100 and not prison welding between valve seat 500 and the discharge connection 900, easily reveal, the electric expansion valve scrappage is high.
Summary of the invention
An object of the present invention is to improve stability and the fastness of the welding between welding seat, valve body and the discharge connection, thereby improve the stability of valve seat.
Another object of the present invention is that nut and valve seat are directly located, with stablizing of position relationship between assurance nut and the valve seat.
For this reason, the invention provides a kind of electric expansion valve, electric expansion valve comprises: valve body, valve seat and discharge connection, the diapire of valve body stretch downwards and form the mouth of pipe that cooperates with valve seat, and the degree of depth of the mouth of pipe is greater than the wall thickness of the diapire of valve body, be arranged with valve seat in the mouth of pipe, the upper support of valve seat is in the inboard of diapire, and the bottom of valve seat passes the mouth of pipe, and discharge connection is set in outside the mouth of pipe of valve body, valve body, valve seat and discharge connection are welded to connect by weld-ring, and weld-ring is positioned at the bottom of the mouth of pipe of valve body.
Further, valve seat and the mouth of pipe between the outer surface that cooperates offer directs solder is penetrated into the diapire of internal layer from the bottom of the mouth of pipe the first guide groove.
Further, the top of valve seat has the lower surface, and the top of valve seat is supported on the diapire by the lower surface, offers the lower surface cannelure that is beneficial to the scolder infiltration on the lower surface, and the lower surface cannelure is communicated with the first guide groove.
Further, the first guide groove is axially extended straight trough.
Further, the groove depth of lower surface cannelure is less than or equal to 0.5mm.
Further, the lower surface is provided with the radially air discharge duct of scavenging action, radially air discharge duct be communicated with the lower surface cannelure and radially air discharge duct 503 extend on the outer surface on top of valve seat.
Further, the quantity of the first guide groove is three, is evenly distributed on the outer surface that cooperates between valve seat and the mouth of pipe.
Further, electric expansion valve also comprises: end cap and sleeve, sleeve are connected to the top of valve body and cover valve body, and sleeve is pipe, the upper end of end cap sealing sleeve, and end cap and sleeve split arrange.
Further, electric expansion valve also comprises: be nested into the nut among the valve seat.
Further, electric expansion valve also comprises: the nut that is structure as a whole with valve seat.
The present invention stretches downwards by the diapire with valve body and forms the mouth of pipe that cooperates with valve seat, the bottom place that is positioned at the mouth of pipe of valve body by weld-ring is set welds together discharge connection and valve body and this three of valve seat, shortened the seepage distance between weld-ring and valve seat and weld-ring and the valve body, and increased contact area between valve body and the valve seat, increased the stability of valve seat; And then, the invention enables valve seat and discharge connection between the outer surface that cooperates offer the first guide groove that directs solder is penetrated into the diapire of internal layer, by the guiding of the first guide groove to scolder, so that the osmotic effect of scolder is better, can be penetrated into the contact position of valve body and valve seat, thereby not only so that between discharge connection and the valve body but also so that can both form good osmotic effect to scolder between discharge connection and the valve seat and between valve body and the valve seat, thereby increased the stability that valve seat connects, reduced the scrappage of product.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide a further understanding of the present invention, and the parts of identical function are with same numerical reference among the figure.Illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.
Fig. 1 shows the structure of existing electric expansion valve;
Fig. 2 is the structure according to the first electric expansion valve of the embodiment of the invention;
Fig. 3 is the syndeton according to the discharge connection of the embodiment of the invention and valve body and valve seat;
Fig. 4 is the stereochemical structure according to the valve seat of the embodiment of the invention;
Fig. 5 is the sectional structure according to the valve seat of the embodiment of the invention;
Fig. 6 is the plan structure according to the valve seat of the embodiment of the invention;
Fig. 7 is the structure according to the second electric expansion valve of the embodiment of the invention, and wherein, nut is nested among the valve seat;
Fig. 8 is the structure according to the third electric expansion valve of the embodiment of the invention, and wherein, nut and valve seat are structure as a whole.
The specific embodiment
Except as otherwise noted, used term has implication given below otherwise in the context of the present invention.Other terms that this paper does not specifically provide implication have its in the art common implication.
Such as Fig. 2, Fig. 3 and shown in Figure 4, the first electric expansion valve according to the embodiment of the invention comprises: valve body 1, valve seat 5 and discharge connection 9, the diapire 17 of valve body stretches downwards and forms the mouth of pipe 19 that cooperates with valve seat 5, the mouth of pipe 19 for example is circular tube shaped, play the effect of installing hole, the depth d of the mouth of pipe 19 is greater than the wall thickness of the diapire 17 of valve body, be arranged with valve seat 5 in the mouth of pipe 17, the top 504 of valve seat is supported on inside bottom wall 101, the bottom 506 of valve seat passes the mouth of pipe 19, discharge connection 9 is set in outside the mouth of pipe 19 of valve body, valve body 1, valve seat 5 and discharge connection 9 are welded to connect after by weld-ring 30 solderings, weld-ring 30 is positioned at the bottom of the mouth of pipe 19 of valve body, for example, be positioned on the end face of the mouth of pipe 19, as shown in Figure 4, valve seat 5 and the mouth of pipe 19 between the outer surface that cooperates offer directs solder is penetrated into inside bottom wall from the bottom of the mouth of pipe the first guide groove 505.
As shown in Figures 2 and 3, weld-ring 30 be positioned at valve body the mouth of pipe 19 bottom place and discharge connection and valve body and this three of valve seat welded together, shortened the seepage distance between weld-ring and valve seat and weld-ring and the valve body, and the mouth of pipe 19 increased the contact area between valve body 1 and the valve seat 5, increased the stability of valve seat.And then, the invention enables valve seat and discharge connection between the outer surface that cooperates offer the first guide groove 505 that directs solder is penetrated into the diapire 101 of internal layer, by the guiding of the first guide groove to scolder, so that the osmotic effect of scolder is better, can be penetrated into the contact position of valve body 1 and valve seat 5, thereby not only so that between discharge connection and the valve body but also so that can both form good osmotic effect to scolder between discharge connection and the valve seat and between valve body and the valve seat, thereby increased the stability that valve seat connects, reduced the scrappage of product.
As optimization, as shown in Figure 4, the top 504 of valve seat 5 has lower surface 502, and the top 504 of valve seat is supported on the inside bottom wall 101 by lower surface 502, offer the lower surface cannelure 501 that is beneficial to the scolder infiltration on the lower surface 502, lower surface cannelure 501 is communicated with the first guide groove 505.Lower surface cannelure 501 has increased scolder in the infiltration of valve seat 5 with valve body 1, so that valve seat 5 is more firm with being welded to connect of valve body 1 in a circumferential direction.Further, the groove depth of lower surface cannelure 501 is less than or equal to 0.5mm, so that the infiltration of brazing solder.
As shown in Figure 4, the first guide groove 505 is axially extended straight trough, and like this, the distance of infiltration is shorter.As shown in Figure 5 and Figure 6, the quantity of the first guide groove 505 is three, in order to form a plurality of infiltration lanes, the first guide groove 505 can be evenly distributed on the outer surface 5061, so that infiltration evenly.
Further, such as Fig. 4 and shown in Figure 6, lower surface 502 is provided with the radially air discharge duct 503 of scavenging action, in order to discharge the bubble that produces in the welding.Radially air discharge duct 503 be communicated with lower surface cannelure 501 and radially air discharge duct 503 extend on the outer surface 5041 on top 504 of valve seat.
Further, as shown in Figure 2, electric expansion valve also comprises: end cap 21 and sleeve 2, sleeve 2 are connected to the top of valve body 1 and cover valve body 1, and sleeve 2 is pipe, the upper end of end cap 21 sealing sleeves 2, end cap 21 and sleeve 2 split settings.End cap 21 and sleeve 2 splits are arranged to need not stretch process in the processing, and cost is low.
Fig. 7 is the second electric expansion valve according to the embodiment of the invention, further, the main distinction of the second electric expansion valve and the first electric expansion valve (shown in Figure 2) is: the nut 61 of the second electric expansion valve is nested among the valve seat 5,5 pairs of nuts 61 of valve seat are directly located like this, can increase the stability between valve seat 5 and the nut 61.Wherein, valve seat 5 extends upward and forms the annular positioning groove 51 that nut 61 is located in the upper end, and the lower support of nut 61 is in annular positioning groove 51.The effect of nut 61 is transmissions, so that the screw mandrel 4 that is arranged in the nut 61 comes and goes mobile at axis direction.Except said structure, about structure and the operation principle of nut 60, can be with reference to prior art.
Fig. 8 is the third electric expansion valve according to the embodiment of the invention, further, as shown in Figure 8, the main distinction of the third electric expansion valve and the first electric expansion valve (shown in Figure 2) is: nut 61 and the valve seat 5 of the third electric expansion valve are structure as a whole, form an integral body, be processed into together, so that valve seat 5 is more stable.Other places, same or similar with front two kinds of electric expansion valves.
The below specifically describes complete structure and the operation principle of electric expansion valve of the present invention to comprise the second electric expansion valve of being nested into the nut 61 among the valve seat 5 as example:
Such as Fig. 7, Fig. 3 and shown in Figure 4, the second electric expansion valve according to the embodiment of the invention comprises: valve body 1, valve seat 5 and discharge connection 9, the diapire 17 of valve body stretches downwards and forms the mouth of pipe 19 that cooperates with valve seat 5, the mouth of pipe 19 for example is circular tube shaped, play the effect of installing hole, the depth d of the mouth of pipe 19 is greater than the wall thickness of the diapire 17 of valve body, be arranged with valve seat 5 in the mouth of pipe 17, the top 504 of valve seat is supported on the inside bottom wall 101, the bottom 506 of valve seat passes the mouth of pipe 19, discharge connection 9 is set in outside the mouth of pipe 19 of valve body, valve body 1, valve seat 5 and discharge connection 9 are welded to connect after by weld-ring 30 solderings, weld-ring 30 is positioned at the bottom of the mouth of pipe 19 of valve body, for example, be positioned on the end face of the mouth of pipe 19, as shown in Figure 4, valve seat 5 and the mouth of pipe 9 between the outer surface that cooperates offer directs solder is penetrated into the diapire of internal layer from the bottom of the mouth of pipe the first guide groove 505.
As shown in Figure 7, valve seat 5 extends upward and forms the annular positioning groove 51 that nut 61 is located in the upper end, and the lower support of nut 61 is in annular positioning groove 51.Valve body 1 is provided with coil, is provided with the magnet rotor 3 of connection wire rod 4 in the valve body, and nut 61 is arranged on the inside of magnet rotor 3, is arranged with needle 160 in the valve seat 5, needle 160 connection wire rods 4 and by spring 13 buffering, reset and damping.Be provided with in the valve seat 5 with entrance sleeve 8 and be connected the passage 53 that is connected (for example being through hole) with discharge connection, needle 160 is being controlled circulation and the flow of fluid between discharge connection 9 and the entrance sleeve 8.
Behind the coil electricity, magnet rotor 3 rotates, thereby driving screw mandrel 4 rotates, nut 61 is in transmission connection with the screw thread of screw mandrel 4, in the rotary course of screw mandrel 4, be subjected to the effect of nut 61, screw mandrel 4 comes and goes mobile at axis direction, screw mandrel 4 drives needle 160 and does traveling priority at valve seat 5, thus the uninterrupted of control electric expansion valve.The top of screw mandrel 4 is connected with pin 15 and spring guide rail 10, is connected with on the spring guide rail 10 and leads moving plate 7, leads moving plate 7 and is pressed on the end cap 21, the rotation of control magnet rotor 3.As shown in Figure 7, the second electric expansion valve also comprises: end cap 21 and sleeve 2, sleeve 2 are connected to the top of valve body 1 and cover valve body 1, and sleeve 2 is pipe, the upper end of end cap 21 sealing sleeves 2, end cap 21 and sleeve 2 split settings.
The embodiments of the invention electric expansion valve is still and utilizes the forward and reverse rotation of coil drive magnetic rotor component, and the rotating operation of magnetic rotor component is converted into moving up and down of screw mandrel, driving the needle that is attached thereto by screw mandrel rises or descends, the uninterrupted of control electric expansion valve.The present invention relates generally to the difference with prior art, and structure and the principle of prior art can be adopted in the place that other are not mentioned.
Said structure of the present invention and feature are in the situation that not conflicting can the combination mutually, the explanation of the specific embodiment of front can disclose general features of the present invention fully, so that other people are easily concrete application by existing knowledge these specific embodiment are adjusted and/or adaptations, these all do not depart from scope of the present invention, so these adjustment and revise the replacement that is equal to be considered as embodiment disclosed in the present invention.
Claims (9)
1. electric expansion valve, described electric expansion valve comprises: valve body, valve seat and discharge connection is characterized in that:
The diapire of described valve body stretches downwards and forms the mouth of pipe that cooperates with described valve seat, the degree of depth of the described mouth of pipe is greater than the wall thickness of the diapire of described valve body, be arranged with described valve seat in the described mouth of pipe, the upper support of described valve seat is in the inboard of described diapire, the bottom of described valve seat passes the described mouth of pipe or concordant, described discharge connection is set in outside the mouth of pipe of described valve body, described valve body, described valve seat and described discharge connection are welded to connect by weld-ring, and described weld-ring is positioned at the bottom of the mouth of pipe of described valve body.
2. electric expansion valve according to claim 1 is characterized in that: described valve seat and the described mouth of pipe between the outer surface that cooperates offer directs solder is penetrated into the diapire of described internal layer from the bottom of the described mouth of pipe the first guide groove (505).
3. electric expansion valve according to claim 2, it is characterized in that: the top of described valve seat has the lower surface, the top of described valve seat is supported on the described diapire by the lower surface, offer the lower surface cannelure (501) that is beneficial to described scolder infiltration on the described lower surface, described lower surface cannelure (501) is communicated with described the first guide groove (505).
4. electric expansion valve according to claim 3, it is characterized in that: described the first guide groove (505) is axially extended straight trough.
5. electric expansion valve according to claim 3, it is characterized in that: described lower surface is provided with the radially air discharge duct (503) of scavenging action, and described radially air discharge duct (503) is communicated with described lower surface cannelure (501) and described radially air discharge duct (503) extends on the outer surface on top of described valve seat.
6. electric expansion valve according to claim 2, it is characterized in that: the quantity of described the first guide groove (505) is three, is evenly distributed on the outer surface that cooperates between described valve seat and the described mouth of pipe.
7. electric expansion valve according to claim 2, it is characterized in that: described electric expansion valve also comprises: end cap and sleeve, described sleeve is connected to the top of described valve body and covers described valve body, described sleeve is pipe, described end cap seals the upper end of described sleeve, and described end cap and described sleeve split arrange.
8. each described electric expansion valve in 7 according to claim 1, it is characterized in that: described electric expansion valve also comprises: be nested into the nut among the described valve seat.
9. each described electric expansion valve in 7 according to claim 1, it is characterized in that: described electric expansion valve also comprises: the nut that is structure as a whole with described valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210219195.XA CN102878730B (en) | 2012-06-29 | 2012-06-29 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210219195.XA CN102878730B (en) | 2012-06-29 | 2012-06-29 | Electronic expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102878730A true CN102878730A (en) | 2013-01-16 |
| CN102878730B CN102878730B (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210219195.XA Active CN102878730B (en) | 2012-06-29 | 2012-06-29 | Electronic expansion valve |
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| CN (1) | CN102878730B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626422A (en) * | 2017-03-23 | 2018-10-09 | 株式会社鹭宫制作所 | Motor-driven valve and the refrigerating circulation system for having used the motor-driven valve |
| CN108692081A (en) * | 2017-04-07 | 2018-10-23 | 浙江盾安机械有限公司 | Electric expansion valve |
| CN110369819A (en) * | 2018-04-12 | 2019-10-25 | 浙江三花智能控制股份有限公司 | A kind of electric expansion valve |
| WO2020025048A1 (en) * | 2018-08-02 | 2020-02-06 | 浙江盾安禾田金属有限公司 | Air conditioning system and electronic expansion valve thereof |
| WO2021164584A1 (en) * | 2020-02-18 | 2021-08-26 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| CN113339510A (en) * | 2020-02-18 | 2021-09-03 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN114688265A (en) * | 2019-03-05 | 2022-07-01 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| EP3904734A4 (en) * | 2018-12-25 | 2022-12-14 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve and air conditioning system using same |
| US11959561B2 (en) | 2019-03-13 | 2024-04-16 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve and refrigeration system |
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| CN2654971Y (en) * | 2003-10-01 | 2004-11-10 | 浙江三花股份有限公司 | Electronic expansion valve body structure |
| CN1789768A (en) * | 2004-12-14 | 2006-06-21 | 浙江三花制冷集团有限公司 | Electronic expansion valve |
| CN101363554A (en) * | 2007-08-09 | 2009-02-11 | 株式会社鹭宫制作所 | Normal-open electromagnetic valve and air conditioner |
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| JP2001174106A (en) * | 1999-12-17 | 2001-06-29 | Matsushita Refrig Co Ltd | Check valve for refrigeration cycle |
| JP2002340213A (en) * | 2001-05-16 | 2002-11-27 | Denso Corp | Flow control valve |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626422B (en) * | 2017-03-23 | 2020-07-28 | 株式会社鹭宫制作所 | Electrically operated valve and refrigeration cycle system using same |
| CN108626422A (en) * | 2017-03-23 | 2018-10-09 | 株式会社鹭宫制作所 | Motor-driven valve and the refrigerating circulation system for having used the motor-driven valve |
| CN108692081A (en) * | 2017-04-07 | 2018-10-23 | 浙江盾安机械有限公司 | Electric expansion valve |
| CN110369819A (en) * | 2018-04-12 | 2019-10-25 | 浙江三花智能控制股份有限公司 | A kind of electric expansion valve |
| JP2021527780A (en) * | 2018-08-02 | 2021-10-14 | 浙江盾安人工環境股▲ふん▼有限公司Ｚｈｅｊｉａｎｇ ＤｕｎＡｎ Ａｒｔｉｆｉｃｉａｌ Ｅｎｖｉｒｏｎｍｅｎｔ Ｃｏ．， Ｌｔｄ | Air conditioning system and its electronic expansion valve |
| KR20200002721U (en) * | 2018-08-02 | 2020-12-15 | 제지앙 둔안 아트피셜 인바이런먼트 컴퍼니 리미티드 | Air conditioning system and its electronic expansion valve |
| WO2020025048A1 (en) * | 2018-08-02 | 2020-02-06 | 浙江盾安禾田金属有限公司 | Air conditioning system and electronic expansion valve thereof |
| JP7082209B2 (en) | 2018-08-02 | 2022-06-07 | 浙江盾安人工環境股▲ふん▼有限公司 | Air conditioning system and its electronic expansion valve |
| KR200495690Y1 (en) * | 2018-08-02 | 2022-07-25 | 제지앙 둔안 아트피셜 인바이런먼트 컴퍼니 리미티드 | Air conditioning system and its electronic expansion valve |
| US11473820B2 (en) | 2018-08-02 | 2022-10-18 | Zhejiang Dunan Artificial Environment Co., Ltd. | Air conditioning system and electronic expansion valve thereof |
| EP3904734A4 (en) * | 2018-12-25 | 2022-12-14 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve and air conditioning system using same |
| US11796234B2 (en) | 2018-12-25 | 2023-10-24 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve and air conditioning system with electronic expansion valve |
| CN114688265A (en) * | 2019-03-05 | 2022-07-01 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| US11959561B2 (en) | 2019-03-13 | 2024-04-16 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve and refrigeration system |
| WO2021164584A1 (en) * | 2020-02-18 | 2021-08-26 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| CN113339510A (en) * | 2020-02-18 | 2021-09-03 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| JP7398560B2 (en) | 2020-02-18 | 2023-12-14 | 浙江盾安人工環境股▲ふん▼有限公司 | electronic expansion valve |
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| CN102878730B (en) | 2014-07-30 |
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