CN102032380A - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
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- CN102032380A CN102032380A CN2009100936805A CN200910093680A CN102032380A CN 102032380 A CN102032380 A CN 102032380A CN 2009100936805 A CN2009100936805 A CN 2009100936805A CN 200910093680 A CN200910093680 A CN 200910093680A CN 102032380 A CN102032380 A CN 102032380A
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- connecting plate
- magnet rotor
- electric expansion
- expansion valve
- stop rod
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Abstract
The embodiment of the invention provides an electronic expansion valve, comprising a magnetic rotor, a stop rod and a screw rod, wherein the axis of the screw rod is coincided with the axis of the magnetic rotor. The electronic expansion valve further comprises a connecting plate which is fixedly arranged in a through hole of the magnetic rotor, a first fixing hole is arranged at the center of the connecting plate, and the upper end part of the screw rod is fixedly arranged in the first fixing hole; a second fixing hole for fixing the stop rod is arranged on the connecting plate, and the lower end part of the stop rod is fixedly arranged in the second fixing hole; and the magnetic rotor drives the screw rod and the stop rod to rotate by the connecting plate. The stop rod, the screw rod and the magnetic rotor are firmly connected by the connecting plate which is fixedly arranged on the magnetic rotor, and the magnetic rotor is not influenced by the radial force of the connecting plate in the process that the stop rod and the screw rod are arranged on the magnetic rotor by the connecting plate, so as to reduce the possibility of cracking of the magnetic rotor owning to high radial force and improve the reliability of the electronic expansion valve.
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, 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 flow size of control electric expansion valve.
The agent structure of prior art electric expansion valve comprises outer cover, valve seat, nut, needle, screw mandrel, magnet rotor and stop rod etc.Wherein, stop rod is injection-moulded in and is used for stop rod and screw mandrel are installed in plastic assembly on the magnet rotor.In the process that electric expansion valve is installed, usually screw mandrel is pressed in the mounting hole of the plastic assembly that is installed with stop rod, the plastic assembly that screw mandrel will be installed then is pressed in the through hole that magnet rotor offers.
In the prior art because magnet rotor is high fragility material, plastic assembly is pressed into magnet rotor after, magnet rotor bears outside radial force, magnet rotor easily breaks because of bearing excessive radial force; Plastic assembly is fixed against pressure fixing between the magnet rotor through hole in magnet rotor, occurs loosening phenomenon easily.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, stop rod and screw mandrel, and the axis of described screw mandrel and the dead in line of described magnet rotor wherein, also comprise:
Connecting plate is installed in first fixed hole of described magnet rotor, and the center of described connecting plate offers first fixed hole, and the upper end portion of described screw mandrel is installed in described first fixed hole; Offer second fixed hole that is used for fixing described stop rod on the described connecting plate, the underpart of described stop rod is installed in described second fixed hole; Described magnet rotor drives described screw mandrel and the rotation of described stop rod by described connecting plate.
Embodiment of the invention electric expansion valve, connecting plate by being installed in magnet rotor is with stop rod and firm being connected of screw mandrel and magnet rotor, thereby make magnet rotor drive screw mandrel and stop rod is rotated by connecting plate, stop rod and screw mandrel are installed in the process of magnet rotor by connecting plate, magnet rotor can not be subjected to the effect of the radial force of connecting plate, thereby reduced magnet rotor because of being subjected to the excessive possibility of breaking of radial force, improved the reliability of electric expansion valve.
Description of drawings
Fig. 1 is the structural representation of the electric expansion valve of the embodiment of the invention;
Fig. 2 is the assembling schematic representation of magnet rotor and connecting plate in the embodiment of the invention electric expansion valve;
Fig. 3 is the sectional view of connecting plate in the embodiment of the invention electric expansion valve;
Fig. 4 is the plan view of connecting plate in the embodiment of the invention electric expansion valve.
Embodiment
Also in conjunction with the accompanying drawings the present invention is described in further detail below by specific embodiment.
Fig. 1 is the structural representation of the electric expansion valve of the embodiment of the invention; Fig. 2 is the assembling schematic representation of magnet rotor and connecting plate in the embodiment of the invention electric expansion valve; Fig. 3 is the sectional view of connecting plate in the embodiment of the invention electric expansion valve; Fig. 4 is the plan view of connecting plate in the embodiment of the invention electric expansion valve.As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the present embodiment electric expansion valve comprises magnet rotor 3, stop rod 6 and screw mandrel 5, the dead in line of the axis of screw mandrel 5 and magnet rotor 3.
Wherein, the agent structure of present embodiment electric expansion valve can also comprise: outer cover 1, valve seat 2, nut 7, needle 8 and the parts that other electric expansion valves comprised such as relevant retaining assembly that rotate with stop rod 6 engagement limits magnet rotors 3, do not give unnecessary details one by one at this.Outer cover 1 is installed on the valve seat 2, magnet rotor 3 is arranged in the valve pocket of outer cover 1 and valve seat 2 formation, the underpart of nut 7 is installed on the valve seat 2, and screw mandrel 5 is plugged in the nut 7 and is in transmission connection with the internal thread of nut 7 upper end portions, and screw mandrel 5 is connected with needle 8 and drives needle 8 and moves up and down.
For screw mandrel 5 and stop rod 6 are installed on the magnet rotor 3 easily, make magnet rotor 3 in installing screw mandrel 5 and stop rod 6 processes, reduce or eliminate the unnecessary radial force effect that magnet rotor 3 bears.The present embodiment electric expansion valve also comprises: connecting plate 4, this connecting plate 4 are installed in the through hole 31 of magnet rotor 3, and the center of connecting plate 4 offers first fixed hole 41, and the upper end portion of screw mandrel 5 is installed in first fixed hole 41.Concrete, boss structure 43 is arranged at the edge of first fixed hole 41 in the present embodiment electric expansion valve.Be arranged to boss structure 43 by edge, can increase the length of first fixed hole 41, thereby make the assembling length that has increased the screw mandrel 5 and first fixed hole 41, help improving the coaxality of screw mandrel 5 and magnet rotor 3 assemblings at first fixed hole 41 of connecting plate 4.Wherein, in order to make screw mandrel 5 easier insertion first fixed holes 41, reduce screw mandrel 5 in the process of first fixed hole 41 of packing into, screw mandrel 5 passes to magnet rotor 3 by connecting plate 4 with radial force.Screw mandrel 5 in the present embodiment can with first fixed hole, 41 Spielpassung, screw mandrel 5 is welded on the connecting plate 4.Because adopting intermittently with first fixed hole 41, screw mandrel 5 cooperates, screw mandrel 5 can insert in first fixed hole 41 easily, and the very little radial force that even is not subjected to of radial force of the screw mandrel 5 that first fixed hole 41 is suffered, thereby the radial force of transmitting by connecting plate 4 that can reduce that magnet rotor 3 born.Screw mandrel 5 is welded on the connecting plate 4, makes screw mandrel 5 firm being fixed on the connecting plate 4.
Particularly, realize in the present embodiment connecting plate 4 be installed on the magnet rotor 3 method can for: connecting plate 4 is fixedlyed connected with magnet rotor 3 employing one injection mouldings, perhaps connecting plate 4 is bonded on the magnet rotor 3 by mighty bond.Present embodiment adopts the one injection moulding to be fixedly connected as example with connecting plate 4 with magnet rotor 3 and describes.Connecting plate 4 in the present embodiment can adopt the powdered metallurgical material compacting sintering to make.For example, the powdered metallurgical material that is used to make connecting plate 4 can be stainless steel powder metallurgical, after connecting plate 4 adopts stainless steel powder metallurgical to make, the realization screw mandrel 5 that can be more prone to is fixed on the connecting plate 4 by welding manner, wherein, connecting plate 4 in the present embodiment electric expansion valve comes through mold pressing, sintering, shaping by stainless steel powder metallurgical, substantially do not produce waste material in the course of working, economize on resources very much, once-through simultaneously has characteristics such as forming parts precision height, technology are simple, can save great deal of labor.At last, the connecting plate of making 4 being placed on two is used to make between the mould of magnet rotor 3.For example, the edge of the connecting plate 4 in the present embodiment can be provided with the annular boss 44 that is used for the mould axially locating of magnet rotor 3, thereby can carry out axially locating by the mould of 44 pairs of magnet rotors 3 of annular boss.Because annular boss 44 radial dimensions are very little, thereby can improve the planeness of the locating face of the formed mould that is used to locate magnet rotor 3 of annular boss 44, thereby can improve the Location accuracy of the mould of magnet rotor 3, effectively reduce magnetic and flow out the formation burr from the locating face between two moulds.Be arranged on the magnetic in the mould of magnet rotor 3, under the location of connecting plate 4 annular boss 44, form magnet rotor 3.That is to say that connecting plate 4 is fixed together by the one injection moulding with magnet rotor 3, and connecting plate 4 is installed in the through hole 31 of magnet rotor 3.Wherein for make connecting plate 4 more firm be installed in magnet rotor 3, prevent that connecting plate 4 and magnet rotor 3 from relatively rotating.The side surface of the connecting plate 4 of present embodiment electric expansion valve is provided with first limit structure 45, the internal surface of the through hole 31 of magnet rotor 3 is provided with second limit structure (not shown), and first limit structure 45 and second limit structure are bonded with each other to prevent that connecting plate 4 and magnet rotor 3 from relative movement taking place.Wherein, first limit structure 45 in the present embodiment and second limit structure are linear structure.Cooperatively interact by first limit structure 45 and second limit structure, connecting plate 4 can not be rotated with respect to magnet rotor 3 in through hole 31, thereby prevent that connecting plate 4 and magnet rotor 3 from relatively rotating.
Offer second fixed hole 42 that is used for fixing stop rod 6 on the connecting plate 4, the underpart of stop rod 6 is installed in second fixed hole 42.Concrete, the stop rod 6 in the present embodiment can with second fixed hole, 42 Spielpassung, stop rod 6 is welded on the connecting plate 4.Wherein, after the stop rod 6 and the second fixed hole Spielpassung, more convenient stop rod 6 inserts in second fixed hole 42, makes the very little radial force that even is not subjected to of radial force of the suffered stop rod 6 of second fixed hole 42, thus the radial force of transmitting by connecting plate 4 that can reduce that magnet rotor 3 born.For prevent stop rod 6 with electric expansion valve in retaining assembly engagement limits magnet rotor 3 when rotating, stop rod 6 bears bigger impact force, thereby this impact force is passed to magnet rotor 3, influences magnet rotor 3 and normally moves.Stop rod 6 in the present embodiment can adopt the elasticity bar to make, thus can alleviate stop the time to the impact of stop rod 6.In addition, during for fear of installation stop rod 6 on connecting plate 4, owing to need and be welded on the connecting plate 4 stop rod 6 insertion second fixed holes 42, the process of installation can cause certain impact force to magnet rotor 3, makes magnet rotor 3 that phenomenons such as breakages take place.Stop rod 6 in the present embodiment can install and fix together in advance with connecting plate 4; Then, adopt the one injection moulding to fixedly connected at the connecting plate 4 that stop rod 6 will be installed with magnet rotor 3.Magnet rotor 3 drives screw mandrel 5 and stop rod 6 rotations by connecting plate 4.Concrete, the magnet rotor 3 in the present embodiment electric expansion valve is connected with stop rod 6 with screw mandrel 5 indirectly by connecting plate 4, and drive screw mandrel 5 and stop rod 6 rotate together.
The present embodiment electric expansion valve, connecting plate by being installed in magnet rotor is with stop rod and firm being connected of screw mandrel and magnet rotor, thereby make magnet rotor drive screw mandrel and stop rod is rotated by connecting plate, stop rod and screw mandrel are installed in the process of magnet rotor by connecting plate, magnet rotor can not be subjected to the effect of the radial force of connecting plate, thereby reduced magnet rotor because of being subjected to the excessive possibility of breaking of radial force, improved the reliability of electric expansion valve.
Based on technique scheme, optionally,, in through hole 31, move axially in order to prevent to be installed in the connecting plate 4 in magnet rotor 3 through holes 31.The internal surface of the through hole 31 of the magnet rotor 3 in the present embodiment electric expansion valve is provided with annular boss 32, and the middle part of this annular boss 32 is provided with groove; The end of connecting plate 4 is installed in the groove.The annular boss 32 of magnet rotor 3 can generate in the process of one injection moulding in the present embodiment.Groove by annular boss 32 can fixed connecting plate 4, and connecting plate 4 can not axially be moved in through hole 31, and by annular boss 32 fixed connecting plates 4, can strengthen the intensity of magnet rotor 3 and the joint of connecting plate 4.
The present embodiment electric expansion valve moves axially by annular boss restriction connecting plate by in the through hole of magnet rotor annular boss being set, and makes more firm being fixed on the magnet rotor of connecting plate, more helps improving the reliability of electric expansion valve.
Based on technique scheme, optionally, screw mandrel 5 and stop rod 6 insert first fixed hole 41 and second fixed hole 42 respectively for convenience, and first fixed hole 41 and second fixed hole 42 in the present embodiment electric expansion valve are provided with chamfering.Concrete, first fixed hole 41 is provided with chamfering 411, and screw mandrel 5 can insert in first fixed hole 41 easily by chamfering 411; Second fixed hole 42 is provided with chamfering 421, and stop rod 6 can insert second fixed hole 42 easily by chamfering 421.
The present embodiment electric expansion valve is by being provided with chamfering on first fixed hole and second fixed hole, convenient screw mandrel and stop rod insert respectively in first fixed hole and second fixed hole.
It should be noted that at last: above embodiment only in order to technological scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, 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 modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (10)
1. an electric expansion valve comprises magnet rotor, stop rod and screw mandrel, and the axis of described screw mandrel and the dead in line of described magnet rotor is characterized in that, also comprise:
Connecting plate is installed in the through hole of described magnet rotor, and the center of described connecting plate offers first fixed hole, and the upper end portion of described screw mandrel is installed in described first fixed hole; Also offer second fixed hole that is used for fixing described stop rod on the described connecting plate, the underpart of described stop rod is installed in described second fixed hole; Described magnet rotor drives described screw mandrel and the rotation of described stop rod by described connecting plate.
2. electric expansion valve according to claim 1 is characterized in that boss structure is arranged at the edge of described first fixed hole.
3. electric expansion valve according to claim 1 is characterized in that the internal surface of the through hole of described magnet rotor is provided with annular boss, and the middle part of described boss is provided with groove; The end of described connecting plate is installed in the described groove.
4. according to claim 1 or 3 described electric expansion valves, it is characterized in that the edge of described connecting plate is provided with the annular boss that is used for the mould axially locating of described magnet rotor.
5. according to claim 1 or 3 described electric expansion valves, it is characterized in that, the side surface of described connecting plate is provided with first limit structure, the internal surface of the through hole of described magnet rotor is provided with second limit structure, and described first limit structure and described second limit structure are bonded with each other to prevent described connecting plate and described magnet rotor generation relative movement.
6. electric expansion valve according to claim 5 is characterized in that, first limit structure and described second limit structure are linear structure.
7. electric expansion valve according to claim 1 is characterized in that, described connecting plate adopts the powdered metallurgical material compacting sintering to make.
8. electric expansion valve according to claim 7 is characterized in that, described powdered metallurgical material is a stainless steel powder metallurgical.
9. electric expansion valve according to claim 1 is characterized in that, described stop rod adopts the elasticity club-shaped material to make.
10. according to claim 1 or 3 described electric expansion valves, it is characterized in that described first fixed hole and described second fixed hole are provided with chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100936805A CN102032380A (en) | 2009-09-27 | 2009-09-27 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100936805A CN102032380A (en) | 2009-09-27 | 2009-09-27 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102032380A true CN102032380A (en) | 2011-04-27 |
Family
ID=43885661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100936805A Pending CN102032380A (en) | 2009-09-27 | 2009-09-27 | Electronic expansion valve |
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| CN (1) | CN102032380A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853100A (en) * | 2011-06-27 | 2013-01-02 | 浙江三花股份有限公司 | Flow control valve |
| CN103032620A (en) * | 2012-12-26 | 2013-04-10 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN103575000A (en) * | 2012-08-10 | 2014-02-12 | 浙江三花股份有限公司 | Electronic expansion valve |
| WO2014023014A1 (en) * | 2012-08-10 | 2014-02-13 | 浙江三花股份有限公司 | Electronic expanding valve |
| CN103925406A (en) * | 2013-01-14 | 2014-07-16 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN104089024A (en) * | 2014-06-27 | 2014-10-08 | 珠海格力电器股份有限公司 | Limiting structure and pressure drop device |
| US9285038B2 (en) | 2011-06-27 | 2016-03-15 | Zhejiang Sanhua Co., Ltd. | Flow control valve |
| US9383027B2 (en) | 2011-06-27 | 2016-07-05 | Zhejiang Sanhua Co., Ltd. | Electronic expansion valve |
| US9506677B2 (en) | 2011-06-27 | 2016-11-29 | Zhejiang Sanhua Co., Ltd. | Electronic expansion valve |
| CN106594340A (en) * | 2015-10-20 | 2017-04-26 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
| US9810461B2 (en) | 2012-06-20 | 2017-11-07 | Zhejiang Sanhua Intelligent Controls Co., Ltd. | Electronic expansion valve |
-
2009
- 2009-09-27 CN CN2009100936805A patent/CN102032380A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9285038B2 (en) | 2011-06-27 | 2016-03-15 | Zhejiang Sanhua Co., Ltd. | Flow control valve |
| CN102853100B (en) * | 2011-06-27 | 2013-12-25 | 浙江三花股份有限公司 | Flow control valve |
| US9506677B2 (en) | 2011-06-27 | 2016-11-29 | Zhejiang Sanhua Co., Ltd. | Electronic expansion valve |
| CN102853100A (en) * | 2011-06-27 | 2013-01-02 | 浙江三花股份有限公司 | Flow control valve |
| US9435457B2 (en) | 2011-06-27 | 2016-09-06 | Zhejiang Sanhua Co., Ltd. | Flow regulating valve |
| US9383027B2 (en) | 2011-06-27 | 2016-07-05 | Zhejiang Sanhua Co., Ltd. | Electronic expansion valve |
| US9810461B2 (en) | 2012-06-20 | 2017-11-07 | Zhejiang Sanhua Intelligent Controls Co., Ltd. | Electronic expansion valve |
| WO2014023014A1 (en) * | 2012-08-10 | 2014-02-13 | 浙江三花股份有限公司 | Electronic expanding valve |
| CN103575000A (en) * | 2012-08-10 | 2014-02-12 | 浙江三花股份有限公司 | Electronic expansion valve |
| US9541315B2 (en) | 2012-08-10 | 2017-01-10 | Zhejiang Sanhua Co., Ltd. | Electronic expanding valve |
| CN103575000B (en) * | 2012-08-10 | 2017-03-01 | 浙江三花智能控制股份有限公司 | A kind of electric expansion valve |
| CN103032620A (en) * | 2012-12-26 | 2013-04-10 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN103925406A (en) * | 2013-01-14 | 2014-07-16 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN104089024A (en) * | 2014-06-27 | 2014-10-08 | 珠海格力电器股份有限公司 | Limiting structure and pressure drop device |
| CN104089024B (en) * | 2014-06-27 | 2016-08-24 | 珠海格力电器股份有限公司 | Limiting structure and pressure drop device |
| CN106594340A (en) * | 2015-10-20 | 2017-04-26 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
| CN106594340B (en) * | 2015-10-20 | 2019-11-22 | 艾默生环境优化技术(苏州)有限公司 | Electric expansion valve |
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Application publication date: 20110427 |