CN103512287A - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
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- CN103512287A CN103512287A CN201210202056.6A CN201210202056A CN103512287A CN 103512287 A CN103512287 A CN 103512287A CN 201210202056 A CN201210202056 A CN 201210202056A CN 103512287 A CN103512287 A CN 103512287A
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- valve
- upper cavity
- fairlead
- electric expansion
- valve rod
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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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Abstract
The invention discloses an electronic expansion valve. The electronic expansion valve comprises a valve rod and a valve seat with a valve cavity, wherein the valve rod is arranged inside the valve cavity. The valve cavity is divided into an upper cavity body communicated with a first connection pipe and a lower cavity body communicated with a second connection pipe through a valve port. The electronic expansion valve further comprises a guide sleeve arranged on the upper cavity body. The guide sleeve is provided with an inner hole and divides the upper cavity body into a first upper cavity main body and a second upper cavity main body surrounding the first upper cavity main body, a communication opening communicated with the first upper cavity main body and the second upper cavity main body is formed in the side wall of the guide sleeve, and the first upper cavity main body is communicated with the lower cavity body through the valve port. The valve rod is attached to the inner hole of the guide sleeve and is movably connected in the axial direction of the guide sleeve. Due to the fact that the valve rod is restrained by the guide sleeve in the whole moving process of work, shake of the valve rod is small, and the flow of refrigerating fluid is stable.
Description
Technical field
The present invention relates to valve technology field, particularly relate to a kind of electric expansion valve.
Background technology
Electric expansion valve, as a kind of control element, is the intelligentized important step of refrigeration system, is also that refrigeration system optimization is able to real important means and the assurance realizing, and has been used in increasing field.As coordinating unit in parallel, converter technique, electric expansion valve can be applicable to large-scale freezing unit, large cold storage, supermarket refrigerator etc., good refrigeration effect, and energy-saving effect is obvious.
In the prior art, the Chinese patent that the patent No. is 200580023202.7 discloses a kind of electric expansion valve, specifically please refer to Fig. 1, and Fig. 1 is the structural representation of a kind of electric expansion valve in prior art.
Electric expansion valve in the prior art comprises valve body 101, and this valve body 101 has the valve port that first flow section and the second flow section are interconnected.
In valve body 101, be provided with sleeve 201, sleeve 201 comprises head 202 and guide part 203, head 202 sealings are supported with actuating mechanism 301, actuating mechanism 301 comprises motor 302 and gear train 303, this motor 302 is in transmission connection by output shaft and gear train 303, and gear train 303 is connected with screw mandrel 401; Guide part 203 inner chambers are provided with valve rod 501, valve rod 501 is connected with screw mandrel 401 by nut 601, and this nut 601 is spacing with actuating mechanism 301 bottom, makes nut 601 can be with ovable valve stem 501 to endwisely slip along it at guide part 203 inner chambers, but can not rotate in a circumferential direction; Valve rod 501 comprises forepiece 502, intermediate member 503 and the back part 504 being combined and installed together, between three, all can connect by threaded engagement, wherein between forepiece 502 and intermediate member 503, be provided with seal disc 505, the lower surface of seal disc 505 forms the sealing surface 551 with valve body 101 sealed engagement, as can be seen from the figure, valve rod 501 stretches into valve port inside.
During work, starter motor 302, its output shaft drives screw mandrel 401 to rotate by gear train 303, due to screw mandrel 401 and nut 601 threaded engagement, and nut 601 is limited, thus nut 601 under the rotation of screw mandrel 401 along the endwisely slipping of guide part 203, the endwisely slipping along guide part 203 with ovable valve stem 501, thereby realize valve rod 501, towards valve port, slide or slide away from valve port, and then realize the object that regulates valve port opening.
But still there is following technical problem in above-mentioned electric expansion valve in actual production is used:
One, due to guide part 203 limited length of sleeve 201, limited to the guide effect of the forepiece 502 of valve rod 501 and intermediate member 503, when valve rod 501 endwisely slips, easily radially rock, thereby cause fluid flow unstable;
They are two years old, because valve rod 501 is connected with actuating mechanism 301 by nut 601, and actuating mechanism 301 is fixing with valve body 101 by sleeve 201, the front end of valve rod 501 must stretch into valve port inside simultaneously, so valve rod 501 is subject to both constraints of valve port and sleeve 201, because valve port and sleeve 201 are follow-up assembling, axiality is difficult to guarantee, easily causes the stuck product rejection that makes of valve rod 501 again;
Its three, as can be seen from Figure 1, seal disc 505 external diameters in valve rod 501 are larger than valve rod 501, inconvenient when valve rod 501 is assembled on valve body 101.
In view of this, how electric expansion valve of the prior art being made improvements, make the stability of flow of its work schedule cryogen, is the current technical issues that need to address of those skilled in the art.
Summary of the invention
Object of the present invention is for providing a kind of electric expansion valve, and the structural design of this electric expansion valve can make the stability of flow of cold-producing medium in the course of work.
For solving the problems of the technologies described above, the invention provides a kind of electric expansion valve, comprise valve rod and the valve seat with valve pocket, described valve rod is located in described valve pocket, and described valve pocket is divided into the lower chamber that is communicated with the first upper cavity of taking over and is communicated with the second adapter by valve port; Also comprise the fairlead of being located at described upper cavity, described fairlead has endoporus, and described upper cavity is isolated into the first upper cavity and around the second upper cavity of described the first upper cavity, described fairlead sidewall is provided with the communication port that is communicated with described the first upper cavity and described the second upper cavity, and described the first upper cavity is communicated with described lower chamber by valve port; The endoporus laminating of described valve rod and described fairlead and being dynamically connected along the axially-displaceable of described fairlead.
Preferably, the circumferential lengths of described communication port is along the axially downward convergent of described fairlead.
Preferably, described communication port is square, circular or oval.
Preferably, described communication port is a plurality of and is evenly arranged in the sidewall of described fairlead.
Preferably, the maximum flow area of described communication port is greater than the circulation area of described valve port.
Preferably, described valve port is arranged on described valve seat.
Preferably, described valve port is arranged on described fairlead.
Preferably, described valve rod is provided with the endoporus connecting with described the first upper cavity.
Preferably, the external diameter of described valve rod is greater than the internal diameter of described valve port.
Preferably, the inwall of described fairlead upper end is provided with the cannelure that step surface makes progress, and between described cannelure and described valve rod, is provided with sealing ring.
Preferably, on the periphery wall of described valve rod, be set with protective sleeve.
Preferably, the end that described valve rod coordinates with described valve port is tapered structure.
On the basis of existing technology, electric expansion valve provided by the invention is provided with the fairlead with endoporus between valve rod and valve seat, described fairlead is located at the upper cavity of described valve seat and described upper cavity is divided into the first upper cavity and around the second upper cavity of described the first upper cavity, described the first upper cavity is communicated with by the lower chamber of valve port and described valve seat, and described fairlead sidewall is provided with the communication port that is communicated with described the first upper cavity and described the second upper cavity; The endoporus laminating of described valve rod and described fairlead and being dynamically connected along the axially-displaceable of described fairlead; The aperture that changes described communication port by moving up and down of described valve rod is circulation area, thereby plays the effect of adjusting refrigerant flow rate.In work, valve rod is all subject to the constraint of fairlead in whole moving process, and therefore, shake when valve rod moves is little, makes the stability of flow of cold-producing medium in the course of work.
A kind of preferred embodiment in, the external diameter of described valve rod is greater than the internal diameter of described valve port, during described valve rod complete shut-down, described valve rod does not stretch in described valve port, obviously, now the lower surface of described valve rod seals with the step end face of described valve port.Described valve rod is only subject to the constraint of described fairlead, and the working axiality of described valve port can not produce harmful effect to the movement of described valve rod, and therefore, described valve rod is not easy stuck.In addition, the size up and down of described valve rod is consistent, easy to assembly.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of electric expansion valve in prior art;
Fig. 2 is the structural representation of electric expansion valve in an embodiment of the present invention;
Fig. 3 is the cutaway view of the valve seat of electric expansion valve and the assembly structure of fairlead in Fig. 2;
Fig. 3-1 is the structural representation of valve seat body in Fig. 3;
Fig. 3-2 are the generalized section of valve seat body in Fig. 3;
Fig. 3-3 are the structural representation of fairlead in Fig. 3;
Fig. 3-4 are the generalized section of fairlead in Fig. 3;
Generalized section when Fig. 4 is the valve rod complete shut-down of electric expansion valve in Fig. 2;
Fig. 5 is the generalized section of the valve rod of electric expansion valve in Fig. 2 when half-open;
Fig. 5-1 is the left view of electric expansion valve in Fig. 5;
Generalized section when Fig. 6 is the valve rod standard-sized sheet of electric expansion valve in Fig. 2;
Fig. 7 is the structural representation of fairlead in the second embodiment of the present invention;
Fig. 7-1 is the generalized section of fairlead in Fig. 7;
Fig. 7-2 are the structural representation that comprises the electric expansion valve of fairlead in Fig. 7;
The specific embodiment
Core of the present invention is for providing a kind of electric expansion valve, and the structural design of this electric expansion valve can make the stability of flow of cold-producing medium in the course of work.
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The related upper and lower noun of locality that waits is to be all arranged in figure and parts position each other defines with parts in Fig. 2 to Fig. 7-2 herein, just in order to explain the clear and convenient of technical scheme.Should be appreciated that the noun of locality adopting should not limit the scope that the application asks for protection herein.
Please refer to Fig. 2 to Fig. 3-4, Fig. 2 is the structural representation of electric expansion valve in an embodiment of the present invention; Fig. 3 is the cutaway view of the valve seat of electric expansion valve and the assembly structure of fairlead in Fig. 2; Fig. 3-1 is the structural representation of valve seat body in Fig. 3; Fig. 3-2 are the generalized section of valve seat body in Fig. 3; Fig. 3-3 are the structural representation of fairlead in Fig. 3; Fig. 3-4 are the generalized section of fairlead in Fig. 3.
In one embodiment, electric expansion valve provided by the present invention comprises the valve seat 1 with valve pocket, and valve seat 1 further comprises valve seat body 11 and is fixed in the sleeve pipe 12 of valve seat body 11 upper ends; The valve pocket of valve seat 1 is divided into be communicated with the upper cavity 14 of the first adapter 91 and to be communicated with second by valve port 13 takes over 92 lower chamber 15; Valve port 13 can be arranged on valve seat body 11, as shown in Fig. 3-2.
It should be noted that, communication port 31 can be made as circumferential lengths along the structure of the axially downward convergent of fairlead 3, and as shown in Fig. 3-3, this kind of structure can make the refrigerant flow of low discharge scope regulate more accurate.Certainly, communication port 31 can be also other structures, as square, circle or ellipsoidal structure.
Further, in order to make in refrigerant flow adjustment process, the stability under loading of fairlead 3, can arrange at the sidewall of fairlead 3 a plurality of communication port 31, and a plurality of communication port 31 are evenly arranged in the sidewall of fairlead 3.
In valve pocket, be provided with valve rod 2, the endoporus laminating of the lower end of valve rod 2 and fairlead 3, valve rod 2 is connected with screw mandrel 4 by being located at its inner nut 7, screw mandrel 4 is in transmission connection by gear train 5 and the motor shaft 62 of motor 6, motor 6 is located in motor casing 61, and motor casing 61 can be fixedly connected by welding with sleeve pipe 12 upper end; Screw mandrel 4 can rotate with motor shaft 62, and along with the rotation of screw mandrel 4, valve rod 2 moves up and down vertically, thereby regulates the aperture of the communication port 31 of fairlead 3 sidewalls, and then realizes the object that refrigerant flow regulates.
For the ease of processing, the material of valve rod 2 can be preferably plastics, further, is set with protective sleeve 21 on the periphery wall of valve rod 2, and protective sleeve 21 is made for metal material, so that the intensity of enhancing valve rod 2.
The external diameter of valve rod 2 is greater than the internal diameter of valve port 13, and valve rod 2 is when complete shut-down state, and valve rod 2 does not stretch in valve port 13, and obviously now the end face of valve rod 2 and the step end face of valve port 13 form sealing, prevent refrigrant leakage.
Because valve rod 2 does not stretch into valve port 13 inside, so the working axiality of valve port 13 can not produce harmful effect to moving up and down of valve rod 2, in the moving process of valve rod 2, be only subject to the constraint of 3 one parts of fairlead, be not easy to occur the stuck phenomenon of valve rod 2.In addition, the consistent size up and down of valve rod 2, compared with prior art, assembles easier.
It is to be noted, because valve port 13 is arranged on valve seat body 11, and the step end face of end face and valve port 13 sealing during valve rod 2 complete shut-down, now, the step of fairlead 3 and valve port 13 can little matched in clearance, the little matched in clearance here, to guarantee that electric expansion valve can work, can not occur to leak as benchmark when valve rod 2 complete shut-down, when practical set, can adjust as required.In preferred version, the step of fairlead 3 and valve port 13 forms sealing.
In the present embodiment, valve rod 2 is set to planar structure with the end that valve port 13 coordinates, certainly, also can be set to pyramidal structure with the end that valve port 13 coordinates by valve rod 2, when close port 13, this pyramidal structure stretches in valve port 13, can further strengthen the sealing reliability of valve rod 2 and valve port 13.It is pointed out that the end that valve rod 2 coordinates with valve port 13 also can be set to other forms, as long as in the time of can guaranteeing close port 13, the sealing of valve rod 2 and valve port 13 reliably.
Further, between valve rod 2 and fairlead 3, be provided with sealing ring 8.Particularly, in the inside, upper end of fairlead 3, be provided with the supine cannelure 32 of step, as shown in Fig. 3-3, sealing ring 8 be arranged in cannelure 32, be sleeved on valve rod 2.
Please refer to Fig. 4 to Fig. 6, wherein, generalized section when Fig. 4 is the valve rod complete shut-down of electric expansion valve in Fig. 2; Fig. 5 is the generalized section of the valve rod of electric expansion valve in Fig. 2 when half-open; Fig. 5-1 is the left view of electric expansion valve in Fig. 5; Generalized section when Fig. 6 is the valve rod standard-sized sheet of electric expansion valve in Fig. 2.
During valve rod 2 complete shut-down, the lower surface of valve rod 2 contacts with the step end face of valve port 13, and obviously both form sealing, and sealing surface is 131.Now, the communication port 31 of fairlead 3 sidewalls is blocked by valve rod 2 perisporiums, and aperture is zero, and the second upper cavity 142 and the first upper cavity 141 are in connected state not, and now refrigerant flow is zero.
When the rotation of valve rod 2 with screw mandrel 4 moves up, communication port 31 apertures of fairlead 3 sidewalls increase, and the second upper cavity 142 and the first upper cavity 141 are communicated with by communication port 31, with reference to figure 5-1, are the aperture schematic diagram of communication port 31 shown in figure.
When valve rod 2 continues to be moved upwards up to communication port 31 standard-sized sheet with screw mandrel 4 rotations, as shown in Figure 6, now refrigerant flow reaches maximum.
Particularly, when the maximum flow area of the communication port 31 of fairlead 3 sidewalls is greater than the circulation area of valve port 13, the maximum of refrigerant flow depends on the circulation area of valve port 13.The starting stage of moving on valve rod 2, refrigerant flow is determined by the aperture of communication port 31, while moving on to certain position on valve rod 2, the circulation area of communication port 31 equates with valve port 13 circulation areas, now refrigerant flow reaches maximum, even if valve rod 2 moves on continuing, the aperture of communication port 31 continues to increase, because the circulation area of valve port 13 is certain, so no longer include variation by the refrigerant flow of valve port 13.
When the maximum flow area of the communication port 31 of fairlead 3 sidewalls is less than the circulation area of valve port 13, refrigerant flow depends on the aperture of communication port 31, during the aperture standard-sized sheet of communication port 31, refrigerant flow reaches maximum, corresponding with the maximum flow area of communication port 31.
When the maximum flow area of the communication port 31 of fairlead 3 sidewalls equals the circulation area of valve port 13, refrigerant flow still depends on the aperture of communication port 31.
In actual production, conventionally using the circulation area of valve port 13 as the foundation of flow adjustment range, so preferably can make the maximum flow area of communication port 31 be more than or equal to the circulation area of valve port 13; Certainly, also can make the maximum flow area of communication port 31 be less than the circulation area of valve port 12, only need make an explanation.
In above-described embodiment, valve port 13 is arranged on valve seat body 11, valve port 13 can also be arranged on fairlead 3.Please refer to Fig. 7, Fig. 7-1 and Fig. 7-2, Fig. 7 is the structural representation of fairlead in the second embodiment of the present invention; Fig. 7-1 is the generalized section of fairlead in Fig. 7; Fig. 7-2 are the structural representation that comprises the electric expansion valve of fairlead in Fig. 7.
As shown in Fig. 7 and Fig. 7-1, in the second embodiment, valve port 13 ' is located at fairlead 3 ’ lower ends, and other structures of fairlead 3 ' are identical with the fairlead 3 in the first embodiment; Fairlead 3 ’ upper ends are still provided with and press-fit step 3 ' 3, can interference fit with the inner chamber of valve seat body 11, also can be welded and fixed; Fairlead 3 inside, ’ upper end are still provided with the supine cannelure 3 ' 2 of step, for placing sealing ring 8; The sidewall of fairlead 3 ' is still provided with communication port 3 ' 1.
The external diameter of valve rod 2 is still greater than the internal diameter of valve port 13 ', and when valve rod 2 complete shut-down, the end face of valve rod 2 and valve port 13 ' form sealing, and its sealing surface is 131 ', as shown in Fig. 7-2.
The step assembling of fairlead 3 ’ lower ends and valve seat body 11, can interference press-fiting also can be by being welded and fixed.Obviously, the sealing of the step of fairlead 3 ’ lower ends and valve seat body 11, to prevent refrigrant leakage.
Above electric expansion valve provided by the present invention is described in detail.Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (12)
1. an electric expansion valve, comprises valve rod and the valve seat with valve pocket, and described valve rod is located in described valve pocket, it is characterized in that, described valve pocket is divided into the lower chamber that is communicated with the first upper cavity of taking over and is communicated with the second adapter by valve port; Also comprise the fairlead of being located at described upper cavity, described fairlead has endoporus, and described upper cavity is isolated into the first upper cavity and around the second upper cavity of described the first upper cavity, described fairlead sidewall is provided with the communication port that is communicated with described the first upper cavity and described the second upper cavity, and described the first upper cavity is communicated with described lower chamber by valve port; The endoporus laminating of described valve rod and described fairlead and being dynamically connected along the axially-displaceable of described fairlead.
2. electric expansion valve as claimed in claim 1, is characterized in that, the circumferential lengths of described communication port is along the axially downward convergent of described fairlead.
3. electric expansion valve as claimed in claim 1, is characterized in that, described communication port is square, circular or oval.
4. electric expansion valve as claimed in claim 1, is characterized in that, described communication port is a plurality of and is evenly arranged in the sidewall of described fairlead.
5. electric expansion valve as claimed in claim 1, is characterized in that, the maximum flow area of described communication port is greater than the circulation area of described valve port.
6. electric expansion valve as claimed in claim 1, is characterized in that, described valve port is arranged on described valve seat.
7. electric expansion valve as claimed in claim 1, is characterized in that, described valve port is arranged on described fairlead.
8. the electric expansion valve as described in claim 1 to 7 any one, is characterized in that, described valve rod is provided with the endoporus connecting with described the first upper cavity.
9. the electric expansion valve as described in claim 1 to 7 any one, is characterized in that, the external diameter of described valve rod is greater than the internal diameter of described valve port.
10. the electric expansion valve as described in claim 1 to 7 any one, is characterized in that, the inwall of described fairlead upper end is provided with the cannelure that step surface makes progress, and between described cannelure and described valve rod, is provided with sealing ring.
11. electric expansion valves as described in claim 1 to 7 any one, is characterized in that, on the periphery wall of described valve rod, are set with protective sleeve.
12. electric expansion valves as described in claim 1 to 7 any one, is characterized in that, the end that described valve rod coordinates with described valve port is tapered structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210202056.6A CN103512287B (en) | 2012-06-15 | 2012-06-15 | A kind of electric expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210202056.6A CN103512287B (en) | 2012-06-15 | 2012-06-15 | A kind of electric expansion valve |
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| Publication Number | Publication Date |
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| CN103512287A true CN103512287A (en) | 2014-01-15 |
| CN103512287B CN103512287B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210202056.6A Active CN103512287B (en) | 2012-06-15 | 2012-06-15 | A kind of electric expansion valve |
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| CN (1) | CN103512287B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867732A (en) * | 2012-12-11 | 2014-06-18 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN104806774A (en) * | 2014-01-26 | 2015-07-29 | 杭州三花研究院有限公司 | Electronic expansion valve |
| US9890869B2 (en) | 2012-12-11 | 2018-02-13 | Zhejiang Sanhua Climate And Appliance Controls Group Co., Ltd | Electronic expansion valve |
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| CN2120231U (en) * | 1992-05-15 | 1992-10-28 | 杨秀勇 | Throttle needle valve |
| JPH1113923A (en) * | 1997-06-30 | 1999-01-22 | Saginomiya Seisakusho Inc | Main valve rotation regulating section assembling method and main valve rotation regulating section structure for rotary type flow switching valve |
| JP2005233368A (en) * | 2004-02-23 | 2005-09-02 | Pacific Ind Co Ltd | Electric flow control valve |
| CN102853596A (en) * | 2011-06-27 | 2013-01-02 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN102853598A (en) * | 2011-06-27 | 2013-01-02 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN102853599A (en) * | 2011-06-27 | 2013-01-02 | 浙江三花股份有限公司 | Electronic expansion valve |
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2012
- 2012-06-15 CN CN201210202056.6A patent/CN103512287B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2120231U (en) * | 1992-05-15 | 1992-10-28 | 杨秀勇 | Throttle needle valve |
| JPH1113923A (en) * | 1997-06-30 | 1999-01-22 | Saginomiya Seisakusho Inc | Main valve rotation regulating section assembling method and main valve rotation regulating section structure for rotary type flow switching valve |
| JP2005233368A (en) * | 2004-02-23 | 2005-09-02 | Pacific Ind Co Ltd | Electric flow control valve |
| CN102853596A (en) * | 2011-06-27 | 2013-01-02 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN102853598A (en) * | 2011-06-27 | 2013-01-02 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN102853599A (en) * | 2011-06-27 | 2013-01-02 | 浙江三花股份有限公司 | Electronic expansion valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867732A (en) * | 2012-12-11 | 2014-06-18 | 浙江三花股份有限公司 | Electronic expansion valve |
| US9890869B2 (en) | 2012-12-11 | 2018-02-13 | Zhejiang Sanhua Climate And Appliance Controls Group Co., Ltd | Electronic expansion valve |
| CN104806774A (en) * | 2014-01-26 | 2015-07-29 | 杭州三花研究院有限公司 | Electronic expansion valve |
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| Publication number | Publication date |
|---|---|
| CN103512287B (en) | 2016-09-07 |
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Effective date of registration: 20170122 Address after: 312500 Zhejiang city of Shaoxing province Xinchang County Chengguan town of Liquan Patentee after: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. Address before: 312500 Liquan village of Chengguan Zhejiang city of Shaoxing province Xinchang County town Patentee before: ZHEJIANG SANHUA Co.,Ltd. |
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Effective date of registration: 20220818 Address after: 312500 Daming new area, Zhejiang Xinchang Economic Development Zone, Xinchang County, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanhua Commercial Refrigeration Co.,Ltd. Address before: Xia Li Quan, Chengguan Town, Xinchang County, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |