CN102042415B - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
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- CN102042415B CN102042415B CN2009102353596A CN200910235359A CN102042415B CN 102042415 B CN102042415 B CN 102042415B CN 2009102353596 A CN2009102353596 A CN 2009102353596A CN 200910235359 A CN200910235359 A CN 200910235359A CN 102042415 B CN102042415 B CN 102042415B
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- expansion valve
- nut
- electric expansion
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Abstract
The invention provides an electronic expansion valve. The electronic expansion valve comprises a magnetic rotor, a connecting rod, and a nut, a valve needle, a valve needle sleeve and a spring which are fixedly arranged on the magnetic rotor, wherein the upper end and the lower end of the connecting rod are provided with a first step and a second step respectively; the first step is movably arranged in a guide hole of the nut; the upper end of the first step extending out of the guide hole of the nut is fixedly provided with a first positioning sheet; the lower part of the step surface of the second step is fixedly provided with a fixing sleeve; a second positioning sheet is movably arranged between the upper end face of the fixing sleeve and the step surface of the second step; the valve needle sleeve is pressed against the upper surface of the second positioning sheet and is fixedly connected with the valve needle; and the spring is arranged between the second positioning sheet and the valve needle. The valve needle is in floating connection with the nut through the connecting rod to shorten the length of the valve needle, so that the impact force on the magnetic rotor is reduced; and the spring is arranged between the valve needle and the second positioning sheet to make the magnetic rotor rotate more stably, so that the reliability of the electronic expansion valve is improved.
Description
Technical field
The embodiment of the invention relates to the valve technology, particularly a kind of electric expansion valve.
Background technique
Present electric expansion valve is a principle of utilizing stepper motor, rotates with the coil drive magnetic rotor component.Through the screw-thread fit of nut and screw mandrel in the electronic expansion method, magnet rotor rotatablely moved is converted into moving up and down of needle, thus the flow size of control electric expansion valve.
Drive the electric expansion valve of nut rotation for magnet rotor, existing technology is pressed into a plastic assembly that is used for installing nut the through hole of magnet rotor usually, is fixedly connected with magnet rotor; Then spring and spring seat are put into successively the endoporus of plastic assembly, wherein, the upper end of spring is resisted against the upper-end surface of plastic assembly endoporus, and the lower end abutment of spring is on the flange of spring seat lower end; Again nut is pressed in the endoporus of this plastic assembly, make spring seat and lower end abutment on nut; In order to be connected with spring seat, long needle need be set, this needle is located in the pilot hole of screw mandrel and nut, the upper end of needle is fixedly connected with the upper end of spring seat, is connected thereby realization needle and nut are unsteady.After the energising, magnet rotor will drive nut rotation, and nut cooperates with screw mandrel on being fixed on valve seat and moves up and down, thereby drive magnet rotor and needle move up and down together.
In realizing process of the present invention; The inventor finds to have following problem in the existing technology at least: long needle easily with electric expansion valve in miscellaneous part generation interference phenomenon; Receive in the needle lower end under the situation of less impact,, will receive bigger impact with the spring seat that is connected on needle top because needle is longer; Thereby bigger impact force is passed to magnet rotor through spring seat, make magnet rotor occur the consequence that lost efficacy easily; In addition, magnet rotor need drive parts rotations such as plastic assembly, nut, spring and spring seat, makes the magnet rotor rotation unstable.Therefore, electric expansion valve reliability of the prior art is lower.
Summary of the invention
The embodiment of the invention provides a kind of electric expansion valve, to improve the reliability of electric expansion valve.
The embodiment of the invention provides a kind of electric expansion valve, comprises magnet rotor, is installed in nut, needle, needle cover and spring on the said magnet rotor, wherein, also comprises:
Connecting rod; The top and bottom of said connecting rod are respectively arranged with first step and second step; Said first step is movably arranged in the pilot hole of said nut, and said first step upper end is stretched out on the position of pilot hole of said nut and is installed with first location piece; The step surface bottom of said second step is installed with fixed cover, is provided with second location piece between the upper-end surface of said fixed cover and the step surface of said second step; Said needle cover is resisted against the upper surface of said second location piece, and said needle cover is fixedly connected with said needle; Be provided with said spring between said second location piece and the said needle.
The electric expansion valve of the embodiment of the invention floats needle and nut and links together through connecting rod is set, and has shortened the length of needle, and needle is after being impacted, and impact force is absorbed by connecting rod to be alleviated, thereby has reduced the suffered impact force of magnet rotor; In addition, spring is arranged between the needle and second location piece, and magnet rotor need not to drive spring and turns round together, makes the magnet rotor rotation more stable, thereby has improved the reliability of electric expansion valve.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technological scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of Fig. 1 for electric expansion valve embodiment of the present invention;
Fig. 2 is the a-quadrant structural representation of Fig. 1;
Fig. 3 is the B regional structure schematic representation of Fig. 1;
Fig. 4 is the partial schematic diagram of electric expansion valve embodiment's of the present invention connecting rod.
Embodiment
For the purpose, technological scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technological scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Fig. 1 is electric expansion valve embodiment's of the present invention structural representation, and Fig. 2 is the a-quadrant structural representation of Fig. 1, and Fig. 3 is the B regional structure schematic representation of Fig. 1, and Fig. 4 is the partial schematic diagram of electric expansion valve embodiment's of the present invention connecting rod.Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, the present embodiment electric expansion valve comprises: magnet rotor 2, be installed in nut 4 on the magnet rotor 2, needle 6, needle cover 61 and spring 8.Wherein, the agent structure of present embodiment electric expansion valve can also comprise: outer cover 1, the valve seat 9 that is fixedly connected with outer cover 1, be installed on the valve seat 9 and the parts that other electric expansion valves comprised such as nut 4 threaded-fit screw rod 5, do not give unnecessary details one by one at this.
In order to shorten the entire length of needle 6, and make magnet rotor 2 need not to carry spring 8 to rotate together, this enforcement electric expansion valve is realized through following mode:
This enforcement electric expansion valve also comprises: connecting rod 7.
The top and bottom of connecting rod 7 are respectively arranged with first step 71 and second step 72.Concrete, connecting rod 7 is used for needle 6 and nut 4 are linked together, thereby can need not directly needle 6 to be fixed on the nut 4.Connecting rod 7 in the present embodiment electric expansion valve installs and fixes for ease, is respectively arranged with first step 71 and second step 72 at the two ends up and down of connecting rod 7, and concrete means of fixation is following.
Step surface 721 bottoms of second step 72 are installed with fixed cover 723, are movably set with second location piece 722 between the step surface 721 of the upper-end surface of fixed cover 723 and second step 72.Concrete; Connecting rod 7 is connected with needle 6 for ease; Step surface 721 bottoms of the second step 72 in the present embodiment electric expansion valve are set with fixed cover 723, are provided with second location piece 722 in the zone that between fixed cover 723 and step surface 721, forms.The effect of second location piece 722 is to be used for needle 6 and connecting rod 7 are linked together.In order to realize that connecting rod 7 and needle 6 can link together flexibly; Make needle 6 rotate and move up and down with respect to connecting rod 7, the thickness of second location piece 722 in the present embodiment electric expansion valve is less than the distance between the step surface 721 of the upper-end surface of fixed cover 723 and second step 72.Be specially; Because the thickness of second location piece 722 in the present embodiment electric expansion valve is less than the distance between the step surface 721 of fixed cover 723 and second step 72; Thereby second location piece 722 can be along moving up and down in the zone that axial direction forms between fixed cover 723 and step surface 721; Wherein, the step surface 721 of connecting rod 7 second steps 72 carries out spacing with the motion of 723 pairs second location pieces 722 of fixed cover.
Structural type one, as shown in Figure 1, the needle 6 in the present embodiment electric expansion valve can offer endoporus 62, and needle cover 61 is plugged in the endoporus 62 of needle 6 and is fixedly connected with needle 6; Be provided with spring 8 in the endoporus 62 of needle 6, the lower end of this spring 8 contacts with the bottom of the endoporus 62 of needle 6.Particularly, the needle 6 in the structural type one of present embodiment electric expansion valve offers endoporus 62, is provided with spring 8 in this endoporus 62, and the outer wall of needle cover 61 is inserted into, and realization is fixedly connected with needle 6 in the endoporus 62; Wherein, also be arranged in endoporus 62 with second location piece 722 that leans of needle cover 61, thereby realize needles 6 and 7 unsteady connections of connecting rod through second location piece 722 and needle cover 61.
Structural type two, the needle cover 61 in the present embodiment electric expansion valve can be the cylindrical structural (not shown) with through hole, the interior flanging (not shown) of the upper end of needle cover 61 is resisted against the upper surface of second location piece 722; Needle 6 is installed in the lower end of needle cover 61; Be provided with spring 8 in the through hole of needle cover 61.Particularly; Needle cover 61 in the structural type two of present embodiment electric expansion valve is for having the cylindrical structural of through hole; Needle cover 61 leans through the interior flanging of upper end setting and the upper surface of second location piece 722; Spring 8 is arranged in the through hole of needle cover 61, and needle 6 is installed in the lower end of needle cover 61; Wherein, comprised second location piece 722 and spring 8 in the through hole of needle cover 61, thereby realized needles 6 and 7 unsteady connections of connecting rod through second location piece 722 and needle cover 61.
Be provided with spring 8 between second location piece 722 and the needle 6.Concrete, the upper end of spring 8 contacts with the lower surface of second location piece 722, and the lower end of spring 8 contacts with needle 6.Spring 8 is arranged between second location piece 722 and the needle 6, thereby the pressure that spring 8 is produced passes to connecting rod 74 or needle cover 61 through second location piece 722.
Below in conjunction with technique scheme, the working procedure of electric expansion valve of the present invention is described.
The present embodiment electric expansion valve realizes that through connecting rod 7 needle 6 is connected with nut 4; Magnet rotor 2 drives in nut 4 rotary courses; Realize that through the internal thread of nut 4 and the screw-thread fit of screw mandrel 5 nut 4 moves up and down, and nut 4 moves up and down through connecting rod 7 drive needles 6.
After needle 6 is impacted; Needle 6 suffered impact forces are passed on second location piece 722 through needle cover 61; Because second location piece 722 can move along connecting rod 7 axial directions, thereby second location piece 722 can be alleviated needle 6 effectively through the impact force that needle cover 61 transmits; And, thereby needle 6 is alleviated through needle cover 61 and the impact force quilt again that connecting rod 7 transmits owing to the first step 71 of connecting rod 7 can move up and down in the pilot hole of nut 4; Finally, the impact force that affacts on the nut 4 is reduced significantly, has lowered the suffered impact force of magnet rotor 2 effectively.
In addition, because spring 8 is arranged between second location piece 722 and the needle 6, spring 8 does not rotate with magnet rotor 2, thereby can reduce the starting resistor of present embodiment electric expansion valve effectively.And the pressure that spring 8 produces passes to connecting rod 7 or needle cover 61 through second location piece 722.When driving needle 6, connecting rod 7 moves downward; After needle 6 and valve port on the valve seat 9 are fitted tightly; Second location piece 722 contacts with the step surface 72 1 of second step 72; The pressure of spring 8 is passed to connecting rod 7 through second location piece 722, thereby the pressure of spring 8 acts between connecting rod 7 and the needle 6.
After connecting rod 7 drive needles 6 move upward, make needle 6 away from the valve port on the valve seat 9, because the thickness of second location piece 722 is less than the step surface 721 of second step 72 and the distance between the fixed cover 723.Second location piece 722 overlaps under the effect of 61 gravity at needle 6 and needle, and the lower surface of second location piece 722 contacts with fixed cover 723; And the upper surface of second location piece 722 fits tightly together with needle cover 61 under the pressure effect of spring 8, that is to say, the pressure of spring 8 only acts between needle 6 and the needle cover 61, and the connecting rod 7 of this moment does not receive the pressure effect of spring 8.Thereby make the present embodiment electric expansion valve after needle 6 is lifted off a seat valve port on 9; The pressure of spring 8 can not affact on the connecting rod 7; Thereby make needle 6 can be relatively and connecting rod 7 rotate freely, and needle 6 can move up and down at the step surface 721 of second step 72 and the zone between the fixed cover 723 through second location piece 722 freely.
The electric expansion valve of the embodiment of the invention floats needle and nut and links together through connecting rod is set, and has shortened the length of needle, and needle is after being impacted, and impact force is absorbed by connecting rod to be alleviated, thereby has reduced the suffered impact force of magnet rotor; In addition, spring is arranged between the needle and second location piece, and magnet rotor need not to drive spring and turns round together, makes the magnet rotor rotation more stable, thereby has improved the reliability of electric expansion valve.And after needle left valve port, second location piece was close to needle and puts under the effect of spring pressure, and spring pressure only acts on needle cover and the needle, and screw mandrel does not receive the effect of spring force.Reset thereby make needle when skew takes place, can be easy to adjustment, and needle and connecting rod relative movement flexibly, more help improving the electric expansion valve reliability.
Based on technique scheme, optional, can rotate more flexibly with respect to needle 6 in order to make spring 8, reduce the frictional force between spring 8 and the needle 6.
For the structural type one of present embodiment electric expansion valve, as shown in Figure 1, be provided with rigid spheres 81 in the endoporus 62 of needle 6, rigid spheres 81 is between the bottom and spring 8 of the endoporus 62 of needle 6.For the structural type two of the electric expansion valve of present embodiment, be provided with rigid spheres 81 in the through hole of needle cover 61, rigid spheres 81 is between needle 6 and spring 8.Concrete, when spring 8 rotated with respect to needle 6, spring 8 contacted with the sphere of rigid spheres 81, and does not contact with needle 6, and rigid spheres 81 can reduce the frictional force that spring 8 relative needles 6 rotations are produced effectively.
The present embodiment electric expansion valve is through being provided with rigid spheres between needle and spring; Thereby can utilize rigid spheres to reduce the frictional force that the relative needle rotation of spring is produced effectively; Thereby needle can be rotated more flexibly, more help improving the electric expansion valve reliability.
What should explain at last is: above embodiment is only in order to explaining technological scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technological scheme of relevant art scheme.
Claims (7)
1. an electric expansion valve comprises magnet rotor, is installed in nut, needle, needle cover and spring on the said magnet rotor, it is characterized in that, also comprises:
Connecting rod; The top and bottom of said connecting rod are respectively arranged with first step and second step; Said first step is movably arranged in the pilot hole of said nut, and said first step upper end is stretched out on the position of pilot hole of said nut and is installed with first location piece; The step surface bottom of said second step is installed with fixed cover, is movably set with second location piece between the upper-end surface of said fixed cover and the step surface of said second step; Said needle cover is resisted against the upper surface of said second location piece, and said needle cover is fixedly connected with said needle; Be provided with said spring between said second location piece and the said needle.
2. electric expansion valve according to claim 1 is characterized in that, the thickness of said second location piece is less than the distance between the step surface of the upper-end surface of said fixed cover and said second step.
3. electric expansion valve according to claim 1 is characterized in that, the distance between the lower end surface of said first location piece and the step surface of said first step is greater than the length of the pilot hole of said nut.
4. according to claim 2 or 3 described electric expansion valves, it is characterized in that said needle offers endoporus, said needle cover is plugged in the endoporus of said needle and is fixedly connected with said needle; Be provided with said spring in the endoporus of said needle, the lower end of said spring contacts with the bottom of the endoporus of said needle.
5. according to claim 2 or 3 described electric expansion valves, it is characterized in that said needle cover is for having the cylindrical structural of through hole, the interior flanging of the upper end of said needle cover is resisted against the upper surface of said second location piece; Said needle is installed in the lower end of said needle cover; Be provided with said spring in the through hole of said needle cover.
6. electric expansion valve according to claim 4 is characterized in that, is provided with rigid spheres in the endoporus of said needle, and said rigid spheres is between the bottom and said spring of the endoporus of said needle.
7. electric expansion valve according to claim 5 is characterized in that, is provided with rigid spheres in the through hole of said needle cover, and said rigid spheres is between said needle and said spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102353596A CN102042415B (en) | 2009-10-09 | 2009-10-09 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102353596A CN102042415B (en) | 2009-10-09 | 2009-10-09 | Electronic expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102042415A CN102042415A (en) | 2011-05-04 |
| CN102042415B true CN102042415B (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102353596A Active CN102042415B (en) | 2009-10-09 | 2009-10-09 | Electronic expansion valve |
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| CN (1) | CN102042415B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511636B (en) * | 2012-06-27 | 2016-04-06 | 浙江三花股份有限公司 | A kind of electric expansion valve |
| CN103925406B (en) * | 2013-01-14 | 2018-02-16 | 浙江盾安禾田金属有限公司 | Electric expansion valve |
| CN104061363B (en) * | 2014-06-11 | 2017-01-25 | 珠海格力电器股份有限公司 | Limit structure and electronic expansion valve |
| CN106996662B (en) * | 2016-01-22 | 2020-09-15 | 浙江三花汽车零部件有限公司 | Electronic expansion valve |
| CN109469768B (en) * | 2017-09-07 | 2022-01-04 | 浙江三花智能控制股份有限公司 | Refrigerating system and electronic expansion valve thereof |
| KR20230063366A (en) * | 2020-10-16 | 2023-05-09 | 제지앙 둔안 아트피셜 인바이런먼트 컴퍼니 리미티드 | Valve core assembly and electronic expansion valve |
| WO2023066116A1 (en) * | 2021-10-20 | 2023-04-27 | 浙江盾安人工环境股份有限公司 | Valve needle component, and flow regulating valve having same |
| CN117167493B (en) * | 2023-11-03 | 2024-03-08 | 华英阀业有限公司 | Valve assembly based on valve rod and use method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1033983B (en) * | 1957-02-15 | 1958-07-10 | Eugen Esswein | Valve cone attachment to rising spindles by screwing |
| CN2667261Y (en) * | 2003-02-27 | 2004-12-29 | 浙江三花股份有限公司 | Magnetic rotor structure for electronic expansion valve |
| CN1869482A (en) * | 2005-05-27 | 2006-11-29 | 株式会社不二工机 | Motor-operated valve |
| CN101080601A (en) * | 2004-12-15 | 2007-11-28 | 株式会社鹭宫制作所 | Electrically operated control valve |
-
2009
- 2009-10-09 CN CN2009102353596A patent/CN102042415B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1033983B (en) * | 1957-02-15 | 1958-07-10 | Eugen Esswein | Valve cone attachment to rising spindles by screwing |
| CN2667261Y (en) * | 2003-02-27 | 2004-12-29 | 浙江三花股份有限公司 | Magnetic rotor structure for electronic expansion valve |
| CN101080601A (en) * | 2004-12-15 | 2007-11-28 | 株式会社鹭宫制作所 | Electrically operated control valve |
| CN1869482A (en) * | 2005-05-27 | 2006-11-29 | 株式会社不二工机 | Motor-operated valve |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-112617A 2006.04.27 |
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| CN102042415A (en) | 2011-05-04 |
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Address after: 312500 Zhejiang city of Shaoxing province Xinchang County Chengguan town of Liquan Patentee after: Zhejiang three flower intelligent control Limited by Share Ltd Address before: 312500 Liquan village of Zhejiang County in Xinchang Province town under Patentee before: Zhejiang Sanhua Group Co., Ltd. |
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