CN201891901U - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN201891901U CN201891901U CN 201020601238 CN201020601238U CN201891901U CN 201891901 U CN201891901 U CN 201891901U CN 201020601238 CN201020601238 CN 201020601238 CN 201020601238 U CN201020601238 U CN 201020601238U CN 201891901 U CN201891901 U CN 201891901U
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- Prior art keywords
- expansion valve
- magnet rotor
- electric expansion
- thrust spring
- wear
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Abstract
The utility model provides an electronic expansion valve, which comprises a valve body, a shell, a magnetic rotor, a mandrel screw and a thrust spring. The shell is connected onto the valve body, the magnetic rotor is disposed in the shell, the mandrel screw is fixedly connected with the magnetic rotor and connected with a nut seat in a threaded manner, the nut seat is disposed on the valve body, and the thrust spring axially presses the magnetic rotor in a biased manner. The electronic expansion valve eliminates a threaded gap between the mandrel screw and the nut seat, guarantees precision of a stay position of the magnetic rotor, and accordingly ensures consistency and precision of flow of fluid flowing through the electronic expansion valve.
Description
Technical field
The utility model relates to the flow control field, more specifically, relates to a kind of electric expansion valve.
Background technique
Present electronic expansion valve arrangement as shown in Figure 1, under the driving of stator coil 24 ', the magnet rotor 23 ' of electric expansion valve inside produces and rotatablely moves, the mandrel screw rod 22 ' that drive is attached thereto rotates, mandrel screw rod 22 ' is connected by screw-thread fit with nut seat 26 ', thereby driving the needle 25 ' that is connected with mandrel screw rod 22 ' moves up and down, make the needle 25 ' and the valve port circulation area of valve body 27 ' produce size variation, regulate flow size by the fluid of electric expansion valve with this.
Electric expansion valve is used for field of air conditioning more, by the size of adjusting by the flow of the refrigerant of electric expansion valve, the temperature variation of regulating air conditioner.Because of electric expansion valve belongs to fine adjustment to the adjusting of transducer air conditioning cold medium flux, therefore the flow of electronic expansion valve adjusting is accurate more, electric expansion valve product flow deviation each other is more little in batches, and is just obvious more, important more to temperature control precision raising, the efficiency raising effect of air conditioner.
As shown in Figure 2, in the present expansion valve mechanism, for guaranteeing that magnet rotor can freely rotate, there is gap (seeing a ' position among Fig. 2) in mandrel screw rod 22 ' inevitably with the screw-thread fit of nut seat 26 ', the existence of this gap just makes magnet rotor play up and down, the machine vibration of while when air conditioner turns round, also can drive rotating freely of magnet rotor (because the stator coil 24 ' of electric expansion valve is after the receiving system instruction is adjusted to a certain position with magnet rotor 23 ', stator coil 24 ' just outage has not been worked, and this moment, magnet rotor 23 ' was in free state).Rotating freely or play of magnet rotor 23 ', directly drive needle 25 ' motion, cause that the circulation area between needle 25 ' and the valve port changes, influence the fluid flow precision of electric expansion valve, and then influence the cold medium flux in the air-conditioning system conformity, cause air conditioner can't be stabilized in a work condition state, it is big that the temperature regulation deviation of air conditioner becomes, and travelling comfort reduces.
The model utility content
The utility model aims to provide a kind of electric expansion valve that can improve the fluid flow precision.
According to electric expansion valve of the present utility model, comprise: valve body, be connected to the housing on the valve body, be arranged on the magnet rotor in the housing, the mandrel screw rod of fixedlying connected with magnet rotor, mandrel screw rod is threaded with nut seat on being arranged on valve body, and electric expansion valve also comprises: thrust spring, and along axis bias voltage magnet rotor.
Further, thrust spring is arranged between magnet rotor and the valve body, and upwards applies pressure to magnet rotor.
Further, magnet rotor is the tubular structure of hollow, and thrust spring is arranged at magnet rotor inside.
Further, electric expansion valve also comprises first wear-resistant gasket, and first wear-resistant gasket is arranged between magnet rotor and the thrust spring, and contacts with thrust spring.
Further, first wear-resistant gasket is stainless steel gasket or is the wear resistant resin pad.
Further, the top of valve body is the tubular structure of upper end open and is sheathed on the outer wall of nut seat, and thrust spring contacts with the upper-end surface of valve body.
Further, electric expansion valve also comprises second wear-resistant gasket, and second wear-resistant gasket is arranged between nut seat and the thrust spring, and contacts with thrust spring.
Further, second wear-resistant gasket is stainless steel gasket or is the wear resistant resin pad.
Adopt electric expansion valve of the present utility model, comprising: thrust spring, thrust spring is along axis bias voltage magnet rotor.The thread pitch that exists between the mandrel screw rod of electric expansion valve and the nut seat has been eliminated in the setting of thrust spring, guarantees the stop place precision of magnet rotor, thereby guarantees the conformity and the precision of the flow of the fluid by electric expansion valve.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the electric expansion valve of prior art;
Fig. 2 is the schematic representation that cooperates of mandrel screw rod and nut seat of the electric expansion valve of prior art;
Fig. 3 is the structural representation according to electric expansion valve of the present utility model; And
Fig. 4 is according to the mandrel screw rod of electric expansion valve of the present utility model and the schematic representation that cooperates of nut seat.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
As shown in Figure 3 and Figure 4 according to electric expansion valve of the present utility model, comprise: valve body 27, be connected to the housing on the valve body 27, be arranged on the magnet rotor 23 in the housing, the mandrel screw rod 22 of fixedlying connected with magnet rotor 23, mandrel screw rod 22 is threaded with nut seat 26 on being arranged on valve body 27, and electric expansion valve also comprises: thrust spring 17, and along axis bias voltage magnet rotor 23.
The gap that exists for the screw-thread fit of eliminating mandrel screw rod 22 and nut seat 26, be provided with thrust spring 17, the elastic force that relies on thrust spring 17 is to magnet rotor 23 applied thrusts, because magnet rotor 23 is fixedlyed connected with mandrel screw rod 22, under the effect of this thrust, mandrel screw rod 22 of fixedlying connected with magnet rotor 23 and the screw thread between the nut seat 26 are fitted mutually.Shown in the enlarged portion among Fig. 4, under the effect of thrust spring 17, a position produces gapless fiting effect, gap between mandrel screw rod 22 and the nut seat 26 is eliminated, no matter be magnet rotor 23 upwards or move downward, a always fits at the position, can not be subjected to the influence of thread pitch.The phenomenon of play up and down of magnet rotor 23 has been eliminated in the setting of thrust spring 17, has guaranteed the positional accuracy of magnet rotor 23.In addition, rely on the elastic force of thrust spring 17, mandrel screw rod 22 is fitted mutually with the screw thread of nut seat 26, frictional force between screw thread increases, this moment is under the double influence of spring force and screw thread frictional force, magnet rotor 23 no longer is a free body that can rotate freely, and not produced by vibration influence and rotate freely motion.Magnet rotor 23 can accurately be adjusted to any position by the stator coil 24 of outside, and rest on this position, and do not produce any free displacement, guaranteed the positional accuracy of magnet rotor 23, thereby guaranteed the positional accuracy of the mandrel screw rod 22 of fixedlying connected with magnet rotor 23, thereby also guaranteed the positional accuracy of the needle 25 that is connected with mandrel screw rod 22, accurately controlled the aperture of electronic valve.
As shown in Figure 3 and Figure 4, thrust spring 17 is arranged between magnet rotor 23 and the valve body 27, and upwards applies pressure to magnet rotor 23.Preferably, magnet rotor 23 is the tubular structure of hollow, and thrust spring 17 is arranged at magnet rotor 23 inside.Preferably, the top of valve body 27 is the tubular structure of upper end open and is sheathed on the outer wall of nut seat 26, and thrust spring 17 contacts with the upper-end surface of valve body 27.
Concrete, thrust spring 17 is arranged between magnet rotor 23 and the valve body 27, during the electric expansion valve proper functioning, thrust spring 17 is in confined state, thereby, eliminate the mandrel screw rod 22 fixedly connected with magnet rotor 23 and the thread pitch between the nut seat 26 to reach to magnet rotor 23 and valve body 27 applied thrusts.In addition, thrust spring 17 is positioned at magnet rotor 23 inside, and valve body 27 is divided into two-part up and down, and its top is tubular structure, and nut seat 26 is arranged at the tubular structure inside of valve body 27, and the part of its sidewall contacts with the inwall on the top of valve body 27.In an embodiment of the present utility model, the upper end of thrust spring 17 contacts with the lower surface of the upper end of magnet rotor 23, its lower end contacts with the upper surface of the upper end of valve body 27, and respectively to the two applied thrust, thereby mandrel screw rod 22 is applied thrust upwards, with the thread pitch between elimination mandrel screw rod 22 and the nut seat 26, and the frictional force between the fitting surface of increase screw thread.
According to an embodiment of the present utility model, electric expansion valve comprises that also first wear-resistant gasket, 153, the first wear-resistant gaskets 153 are arranged between magnet rotor 23 and the thrust spring 17, and contacts with thrust spring 17.First wear-resistant gasket 153 is stainless steel gasket or is the wear resistant resin pad.
For preventing that magnet rotor 23 from producing friction with thrust spring 17 and producing powder impurity in rotary course, as shown in Figure 4, first wear-resistant gasket 153 is set between thrust spring 17 and magnet rotor 23.First wear-resistant gasket 153 can be selected the good material of any wear resistance for use, and preferably, first wear-resistant gasket 153 is stainless steel gasket or is the wear resistant resin pad.
According to an embodiment of the present utility model, electric expansion valve comprises that also second wear-resistant gasket, 154, the second wear-resistant gaskets 154 are arranged between nut seat 26 and the thrust spring 17, and contacts with thrust spring 17.Second wear-resistant gasket 154 is stainless steel gasket or is the wear resistant resin pad.
When thrust spring 17 directly contacts with the bottom surface of nut seat 26, drive thrust spring 17 in magnet rotor 23 rotary courses easily and produce rotation, thrust spring 17 can produce friction when rotated and cause the hair fastener sluggishness with the upper-end surface of nut seat 26, and may produce powder impurity.In order to eliminate this phenomenon, second wear-resistant gasket 154 is set between nut seat 26 and thrust spring 17, prevent the generation of powder impurity on the one hand, eliminate the hair fastener delay phenomenon on the other hand.
Because electric expansion valve is used for field of air conditioning more, when the refrigerant throughput that is used for air-conditioning when electric expansion valve of the present utility model is regulated, the magnet rotor of having stopped electric expansion valve because of the thread pitch play, rotate freely inconsistent, the wild effect of cold medium flux in the system that the change in location that causes causes.Can guarantee that magnet rotor accurately stops and remain on the arbitrary position, greatly improve the flow control accuracy of expansion valve, thus improve and guaranteed air conditioner work condition state, guaranteed temperature control precision.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect:
Electric expansion valve of the present utility model, eliminated the thread pitch that exists between the mandrel screw rod of electric expansion valve and the nut seat, increased the frictional force between screw thread, this moment is under the double influence of spring force and screw thread frictional force, guarantee the stop place precision of magnet rotor, thereby assurance is by the conformity and the precision of the flow of the fluid of electric expansion valve.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. electric expansion valve, comprise: valve body (27), be connected to the housing on the described valve body (27), be arranged on the magnet rotor (23) in the described housing, the mandrel screw rod (22) of fixedlying connected with described magnet rotor (23), described mandrel screw rod (22) is threaded with nut seat (26) on being arranged on described valve body (27), it is characterized in that, also comprise: thrust spring (17), along the described magnet rotor of axis bias voltage (23).
2. electric expansion valve according to claim 1 is characterized in that, described thrust spring (17) is arranged between described magnet rotor (23) and the described valve body (27), and upwards applies pressure to described magnet rotor (23).
3. electric expansion valve according to claim 2 is characterized in that, described magnet rotor (23) is the tubular structure of hollow, and described thrust spring (17) is arranged at described magnet rotor (23) inside.
4. electric expansion valve according to claim 3, it is characterized in that, described electric expansion valve also comprises first wear-resistant gasket (153), described first wear-resistant gasket (153) is arranged between described magnet rotor (23) and the described thrust spring (17), and contacts with described thrust spring (17).
5. electric expansion valve according to claim 4 is characterized in that, described first wear-resistant gasket (153) is stainless steel gasket or is the wear resistant resin pad.
6. electric expansion valve according to claim 3, it is characterized in that, the top of described valve body (27) is the tubular structure of upper end open and is sheathed on the outer wall of described nut seat (26), and described thrust spring (17) contacts with the upper-end surface of described valve body (27).
7. electric expansion valve according to claim 3, it is characterized in that, described electric expansion valve also comprises second wear-resistant gasket (154), and described second wear-resistant gasket (154) is arranged between described nut seat (26) and the described thrust spring (17), and contacts with described thrust spring (17).
8. electric expansion valve according to claim 7 is characterized in that, described second wear-resistant gasket (154) is stainless steel gasket or is the wear resistant resin pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020601238 CN201891901U (en) | 2010-11-10 | 2010-11-10 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020601238 CN201891901U (en) | 2010-11-10 | 2010-11-10 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201891901U true CN201891901U (en) | 2011-07-06 |
Family
ID=44221378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020601238 Expired - Fee Related CN201891901U (en) | 2010-11-10 | 2010-11-10 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201891901U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032620A (en) * | 2012-12-26 | 2013-04-10 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN103512289A (en) * | 2013-09-27 | 2014-01-15 | 碧茂科技（苏州）有限公司 | Fixing structure of valve body of expansion valve |
| CN105333203A (en) * | 2014-08-08 | 2016-02-17 | 杭州三花研究院有限公司 | Electronic expansion valve |
| CN105485349A (en) * | 2014-09-18 | 2016-04-13 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| CN107631033A (en) * | 2016-07-19 | 2018-01-26 | 株式会社鹭宫制作所 | Motor-driven valve |
-
2010
- 2010-11-10 CN CN 201020601238 patent/CN201891901U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032620A (en) * | 2012-12-26 | 2013-04-10 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN103512289A (en) * | 2013-09-27 | 2014-01-15 | 碧茂科技（苏州）有限公司 | Fixing structure of valve body of expansion valve |
| CN103512289B (en) * | 2013-09-27 | 2016-04-13 | 碧茂科技（苏州）有限公司 | Expanding valve body fixed structure |
| CN105333203A (en) * | 2014-08-08 | 2016-02-17 | 杭州三花研究院有限公司 | Electronic expansion valve |
| CN105485349A (en) * | 2014-09-18 | 2016-04-13 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| CN107631033A (en) * | 2016-07-19 | 2018-01-26 | 株式会社鹭宫制作所 | Motor-driven valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20161110 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |