CN201198917Y - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN201198917Y CN201198917Y CNU2008200837374U CN200820083737U CN201198917Y CN 201198917 Y CN201198917 Y CN 201198917Y CN U2008200837374 U CNU2008200837374 U CN U2008200837374U CN 200820083737 U CN200820083737 U CN 200820083737U CN 201198917 Y CN201198917 Y CN 201198917Y
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- CN
- China
- Prior art keywords
- expansion valve
- valve
- magnet steel
- valve body
- outer cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides an electronic expansion valve, belonging to fluid control elements; the magnetic steel protection film of the prior art has poor corrosion resistance; the valve chamber of the expansion valve is internally provided with a multi-pole magnetic rotor which consists of magnetic steel and a metal core; the electronic expansion valve is characterized in that: the surface of the magnetic steel is provided with a Parylene resin protection film which is a coating with strong insulation performance, anti-moisture performance and drug resistance formed by a chemical vapor bonding (CVD) method; furthermore, the coating generates no thermal pressure on objects; the coating grows from the surface of the substrate to the outside, thus having uniform thickness; therefore, the formed Parylene resin protection film can lead the corrosion resistance of the magnetic steel to be greatly improved.
Description
Technical field
The utility model belongs to fluid control elements, a kind of specifically precision of the magnet steel cover coat uniformity and size and electric expansion valve of corrosion resistance of improving.
Background technique
Regulate the electric expansion valve that flow is used, comprise valve body and electromagnetic coil, wherein valve body comprises outer cover and the valve seat that is connected the outer cover bottom, between outer cover and valve seat, form the valve body chamber, the valve body chamber is built-in with a multi-polar magnetic rotor, be provided with the needle that cooperates with the valve port of valve seat by the multi-polar magnetic rotor driven, electromagnetic coil is enclosed within outside the outer cover; In addition, valve body is provided with retaining thread, and rotor is provided with the rotation screw thread supporting with described retaining thread, described retaining thread with rotate screw thread form one can relative accurate turn the motion thread pair.This structure is served as spindle, is served as rotor by the multi-polar magnetic rotor and promptly constituted stepper motor by electromagnetic coil.When system works, electronic controller is by sending pulse signal to electromagnetic coil, the rotation of control rotor, by rotatablely moving of motion thread adjutant rotor be converted into needle vertically straight line move, thereby regulate the flow area of valve port, adjusting flows to the refrigerant flow of vaporizer, and the refrigeration agent to vaporizer supply optimal dose guarantees the efficient operation of refrigeration system.
The electric expansion valve of said structure, because the multi-polar magnetic rotor is positioned at the valve body chamber, constantly contact with flowing medium, therefore it should have excellent corrosion resisting performance, the technological scheme of " technological method of a kind of neodymium iron boron magnetic body nickel plating and ability cathode electrophoresis composite protective " that the application of ZL03134078.4 Chinese invention patent discloses (publication number is CN1528951A), it is that the ability cathode electrophoresis technology is combined with the electronickelling technology, and in nickel plating technology, implement to soak nickel, plating semi-bright nickel and bright nickel plating operation, to reach goal of the invention.Yet its nickel plating technology adopts liquid immersion plating, and action of gravity makes the coating of part surface two-part can not be even up and down during curing, and thickness of coating can not accurately be controlled, and dimensional accuracy is not high, influences the raising of the decay resistance of whole magnet steel; In addition, its nickel plating technical matters road flow process is too complicated, can influence the accurate control of thickness of coating equally, influences the raising of the decay resistance of magnet steel equally.Above-mentioned factor finally causes the decay resistance of magnet steel relatively poor.
The technical assignment of the technical problems to be solved in the utility model and proposition is the relatively poor defective of decay resistance that overcomes the magnet steel protective film of prior art, and a kind of new electric expansion valve is provided.The utility model is by the following technical solutions for this reason:
A kind of electric expansion valve; comprise valve body and electromagnetic coil; wherein valve body comprises outer cover and the valve seat that is connected the outer cover bottom; between outer cover and valve seat, form the valve body chamber; the valve body chamber is built-in with a multi-polar magnetic rotor of being made up of magnet steel and metal core piece; be provided with the needle that cooperates with the valve port of valve seat by the multi-polar magnetic rotor driven; valve body is provided with retaining thread; rotor is provided with the rotation screw thread supporting with described retaining thread; described retaining thread with rotate screw thread form one can relative accurate turn the motion thread pair; electromagnetic coil is enclosed within outside the outer cover, it is characterized in that the surface of described magnet steel is provided with Parylene resin (English Parylene by name) protective film.
Described magnet steel is made by Nd-Fe-B magnet steel.
The beneficial effects of the utility model are:
Parylene resin (Parylene) is the strong coating of a kind of insulation, protection against the tide, the resistance to the action of a drug that forms by chemical vapors Method for bonding (CVD); And, can not produce thermal pressure to target object, this coating is the surface outside " growth " from base material, the coating thickness of formation is even; The CVD coated technique does not have solvent, auxiliary agent; even do not have pin hole in 0.1 micron thickness yet; the little molecule of gaseous state directly aggregates into solid-state coated film at workpiece surface; do not have the solidification process of common coating and solidify the shrinking stress that causes; can carry out the surface to workpiece reinforces; but can not cause injury, also inhomogeneous less than the coating surface shape that causes because of surface tension, therefore formed Parylene resin protective film can make the corrosion resistance of magnet steel improve greatly.Have reliable advance, obviously be better than brushing, dip-coating, spraying waits other coating technology.
Description of drawings
A kind of electric expansion valve structural representation that Fig. 1 is provided for the utility model embodiment.
Fig. 2 is the structure enlarged diagram of multi-polar magnetic rotor among Fig. 1.
Fig. 3 is the A portion enlarged diagram among Fig. 2.
Among the figure:
1-valve seat;
2-outer cover;
3-valve body chamber;
4-multi-polar magnetic rotor, 41-magnet steel, 41a-Parylene resin protective film, 42-metal core piece;
5-needle.
Embodiment
Below in conjunction with Figure of description the utility model is described in further details.
As shown in Figure 1, electric expansion valve that the utility model relates to and prior art are similar on the formation of component, do not repeat them here; Key of the present utility model is:
The multi-polar magnetic rotor is made up of magnet steel and metal core piece, and the surface of magnet steel is provided with Parylene resin protective film; Magnet steel is made (referring to Fig. 2,3) by neodymium iron boron.
During manufacturing, with chemical vapors Method for bonding (CVD) Parylene resin (Parylene) is formed on the surface of Nd-Fe-B magnet steel, assembling afterwards is assembled together with other member.
It is directly to form solid cladding and the middle transition stage of neither one liquid state by the gas phase monomer that the advance of the coating technology of chemical vapors Method for bonding (CVD) is mainly derived from it, therefore in conventional method since the surface tension face cause from the rib sword trickle in low groove buildup phenomenon it can not take place; And compliance with environmental protection requirements.
Claims (2)
1. electric expansion valve; comprise valve body and electromagnetic coil; wherein valve body comprises outer cover and the valve seat that is connected the outer cover bottom; between outer cover and valve seat, form the valve body chamber; the valve body chamber is built-in with a multi-polar magnetic rotor of being made up of magnet steel and metal core piece; be provided with the needle that cooperates with the valve port of valve seat by the multi-polar magnetic rotor driven; valve body is provided with retaining thread; rotor is provided with the rotation screw thread supporting with described retaining thread; described retaining thread with rotate screw thread form one can relative accurate turn the motion thread pair; electromagnetic coil is enclosed within outside the outer cover, it is characterized in that the surface of described magnet steel is provided with Parylene resin protective film.
2. electric expansion valve according to claim 1 is characterized in that described magnet steel made by Nd-Fe-B magnet steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200837374U CN201198917Y (en) | 2008-03-04 | 2008-03-04 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200837374U CN201198917Y (en) | 2008-03-04 | 2008-03-04 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201198917Y true CN201198917Y (en) | 2009-02-25 |
Family
ID=40450072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200837374U Expired - Lifetime CN201198917Y (en) | 2008-03-04 | 2008-03-04 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201198917Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104421458A (en) * | 2013-08-23 | 2015-03-18 | 海信（山东）空调有限公司 | Air conditioning energy-saving four-way reversing valve and control method thereof |
| CN112228335A (en) * | 2019-07-15 | 2021-01-15 | 奥达尔（香港）有限公司 | Fluid pump |
-
2008
- 2008-03-04 CN CNU2008200837374U patent/CN201198917Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104421458A (en) * | 2013-08-23 | 2015-03-18 | 海信（山东）空调有限公司 | Air conditioning energy-saving four-way reversing valve and control method thereof |
| CN104421458B (en) * | 2013-08-23 | 2017-06-20 | 海信（山东）空调有限公司 | air conditioner energy-saving four-way reversing valve and control method |
| CN112228335A (en) * | 2019-07-15 | 2021-01-15 | 奥达尔（香港）有限公司 | Fluid pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 312500 Shaoxing City, Zhejiang province Xinchang Qixing street under the Liquan Patentee after: Zhejiang three flower intelligent control Limited by Share Ltd Address before: 312500 Zhejiang County in Xinchang Province town of Liquan Patentee before: Zhejiang Sanhua Group Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090225 |
|
| CX01 | Expiry of patent term |