CN201891900U - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN201891900U CN201891900U CN 201020601088 CN201020601088U CN201891900U CN 201891900 U CN201891900 U CN 201891900U CN 201020601088 CN201020601088 CN 201020601088 CN 201020601088 U CN201020601088 U CN 201020601088U CN 201891900 U CN201891900 U CN 201891900U
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- expansion valve
- main body
- electric expansion
- spring
- spring seat
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Abstract
The utility model provides an electronic expansion valve, which comprises a shell, a magnetic rotor, a mandrel screw, a nut seat and a thrust spring. The magnetic rotor is arranged in the shell, the mandrel screw is connected with the magnetic rotor, the nut seat is fixedly arranged in the shell and connected with the mandrel screw in a threaded manner, and the thrust spring axially presses the mandrel screw 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 guarantees 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: housing, be arranged on the magnet rotor in the housing, the mandrel screw rod that is connected with magnet rotor, and be fixedly installed on the nut seat that is threaded with mandrel screw rod in the housing, electric expansion valve also comprises: thrust spring, and along axis bias voltage mandrel screw rod.
Further, the upper end of housing has cover plate, and electric expansion valve also comprises: spring seat is the tubular structure of lower ending opening, and is arranged at the lower end of cover plate; Thrust spring is arranged in the housing, between spring seat and mandrel screw rod, and applies pressure to the top of mandrel screw rod downwards.
Further, mandrel screw rod comprises the screw rod main body and is fixed in the moving plate of leading on screw rod main body top, and it is L-shaped to lead moving plate, comprises horizontal ends and vertical end, and its horizontal ends is fixedlyed connected with the screw rod main body, and an end of thrust spring applies pressure to the horizontal ends of leading moving plate.
Further, spring seat comprises spring seat main body and pad, and pad is arranged between spring seat main body and the thrust spring.
Further, electric expansion valve also comprises limit spring, and limit spring is arranged on the outer wall of spring seat main body.
Further, electric expansion valve also comprises helical spacing back-up ring, spacing back-up ring is arranged in the pitch groove of limit spring, first end of spacing back-up ring is protruding in the pitch groove, and the horizontal equivalent of the shaft axis of the end-to-end distance spring seat main body of first end of spacing back-up ring is greater than the horizontal equivalent of the shaft axis of the vertical end distance spring seat main body of leading moving plate.
Further, the lower end of spring seat main body is provided with the limiting stopper of second end of the spacing back-up ring of backstop.
Further, limiting stopper be on the sidewall of lower end of spring seat main body the impact extrusion projection or for the cutting flange projection on the sidewall of the lower end of spring seat main body or be the solder-bump in the groove that is welded in spring seat main body lower end.
Further, the end of an end of limit spring is welded on the sidewall of limiting stopper.
Further, the terminal bending of limit spring is also stretched in the groove of limiting stopper one side, is connected by welding or riveted joint between the end of limit spring and the spring seat main body.
Adopt electric expansion valve of the present utility model, comprise thrust spring, thrust spring is along the mandrel screw rod of axis bias expansion valve.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;
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;
Fig. 5 is the structural representation according to first embodiment of the spring seat of electric expansion valve of the present utility model;
Fig. 6 is the structural representation according to second embodiment of the spring seat of electric expansion valve of the present utility model;
Fig. 7 is the structural representation according to the 3rd embodiment of the spring seat of electric expansion valve of the present utility model;
Fig. 8 is the schematic representation according to first embodiment of the orientation type of the limit spring of electric expansion valve of the present utility model and spacing back-up ring; And
Fig. 9 is the schematic representation according to second embodiment of the orientation type of the limit spring of electric expansion valve of the present utility model and spacing back-up ring.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Electric expansion valve as shown in Figure 3, comprise: housing, be arranged on the magnet rotor 23 in the housing, the mandrel screw rod 20 that is connected with magnet rotor 23, and be fixedly installed on the nut seat 26 that is threaded with mandrel screw rod 20 in the housing, also comprise: thrust spring 17, along axis bias voltage mandrel screw rod 20.
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 mandrel screw rod 20 applied thrusts, and under the effect of this thrust, the screw thread between mandrel screw rod 20 and the nut seat 26 is 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 20 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 20 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 20 of fixedlying connected with magnet rotor 23, thereby also guaranteed the positional accuracy of the needle 25 that is connected with mandrel screw rod 20, accurately controlled the aperture of electric expansion valve.
As shown in Figure 3 and Figure 4, the upper end of housing has cover plate 16, and electric expansion valve also comprises: spring seat 15 is the tubular structure of lower ending opening, and is arranged at the lower end of cover plate 16; Thrust spring 17 is arranged in the housing, between spring seat 15 and mandrel screw rod 20, and applies pressure to the top of mandrel screw rod 20 downwards.
Preferably, electric expansion valve also comprises spring seat 15, and spring seat 15 is positioned at housing and is installed in the lower end of the cover plate 16 of housing upper end, and spring seat 15 is fixedlyed connected with cover plate 16, can the two be connected by the mode of welding.Spring seat 15 is tubular structure and its lower ending opening, thrust spring 17 is arranged between spring seat 15 and the mandrel screw rod 20, the top of thrust spring 17 is positioned at the cylindrical shell of spring seat 15, extend outside the spring seat 15 its underpart, and thrust spring 17 relies on spring seat 15 to play the effect of guiding, anti-spring deflection.Exerting pressure downwards in the top of 17 pairs of mandrel screw rods 20 of thrust spring, thereby eliminates thread pitch, and the frictional force between the fitting surface of increase screw thread.
As shown in Figure 4, spring seat 15 comprises spring seat main body 152 and pad 153, and pad 153 is arranged between spring seat main body 152 and the thrust spring 17.
When thrust spring 17 directly contacts with the bottom surface of spring seat 15, drive thrust spring 17 in magnet rotor 23 rotary courses easily and produce rotation, thrust spring 17 produces friction with the bottom surface of spring seat main body 152 when rotated and causes the hair fastener sluggishness, influences expansion valve and opens the valve performance instability.Between the bottom surface of spring seat main body 152 and thrust spring 17, install pad 153 additional, can eliminate the phenomenon of hair fastener sluggishness.The material of pad 153 can or be a stainless steel material for wear resistant resin.
As shown in Figure 3 and Figure 4, what mandrel screw rod 20 comprised screw rod main body 22 and was fixed in screw rod main body 22 tops leads moving plate 21, and it is L-shaped to lead moving plate 21, comprises horizontal ends and vertical end, its horizontal ends is fixedlyed connected with screw rod main body 22, and an end of thrust spring 17 applies pressure to the horizontal ends of leading moving plate 21.
As shown in Figure 3 and Figure 4, electric expansion valve also comprises limit spring 14, and limit spring 14 is arranged on the outer wall of spring seat main body 152.Preferably, electric expansion valve also comprises helical spacing back-up ring 13, spacing back-up ring 13 is arranged in the pitch groove of limit spring 14, first end of spacing back-up ring 13 is protruding in the pitch groove, and the horizontal equivalent of the shaft axis of the end-to-end distance spring seat main body 152 of first end of spacing back-up ring 13 is greater than the horizontal equivalent of the shaft axis of the vertical end distance spring seat main body 152 of leading moving plate 21.
Limit spring 14 and spacing back-up ring 13 are the position-limit mechanism of electric expansion valve, and limit spring 14 is set on the spring seat main body 152, and spacing back-up ring 13 is arranged in the spring pitch groove of limit spring 14, and can rise along the pitch groove of limit spring 14 or descend.On limit spring 14 or spring seat 15, limit limit stoper is set, like this, when under spacing back-up ring 13 is being led the drive of moving plate 21, rotating, limit limit stoper can guarantee that the needle 25 of fixedlying connected with screw rod main body 22 is maximum in aperture and the position closed between move.The afterbody of first end of spacing back-up ring 13 stretches out from the pitch groove of limit spring 14, and extends to outside the circular movement track of leading moving plate 21, is in contact with one another to guarantee the extension potential energy of leading moving plate 21 and spacing back-up ring 13.
To shown in Figure 9, the lower end of spring seat main body 152 is provided with the limiting stopper 151 of second end of the spacing back-up ring 13 of backstop as Fig. 5.
The lower end of spacing back-up ring 13 is provided with limiting stopper 151, as the limit limit stoper of electric expansion valve, and a limit position of the spacing back-up ring 13 of limiting stopper 151 restrictions.Limiting stopper 151 can be arranged on the terminal position of the lower end of limit spring 14, also can be stuck in the pitch groove of limit spring, perhaps can be blocked in limit spring pitch groove front end.When the downward complete shut-down cut-off valve needle-like attitude of magnet rotor 23 rotation, utilize limiting stopper 151 to block spacing back-up ring 13, utilize Sealing shield ring 13 to block again and lead moving plate 21, because leading moving plate 21 links together with screw rod main body 22, and screw rod main body 22 combines with magnet rotor 23 plastic packagings, utilization is moved thereby make magnet rotor 23 can't continue to rotate downward needle complete shut-down state to leading the spacing of moving plate 21; Played the distance and position that 23 rotations of control magnet rotor move downward.
Preferably, limiting stopper 151 is for the projection of the impact extrusion on the sidewall of the lower end of spring seat main body 152 or for the cutting flange projection on the sidewall of the lower end of spring seat main body 152 or be the solder-bump in the groove that is welded in spring seat main body 152 lower ends.
For the formation of limiting stopper 151, an embodiment as shown in Figure 5 can be spring seat main body 152 to be carried out impact extrusion form projection; An embodiment as shown in Figure 6 also can be spring seat main body 152 to be cut the back cutting part flange is formed projection; An embodiment as shown in Figure 7 also can adopt split gang welding combination, processes groove on spring seat main body 152, limiting stopper 151 is welded on the groove again, forms solder-bump; In addition,, also can adopt the metallurgical once through moulding technology of spring seat 15 integrated powder, the manufacture cost of spring seat 15 is reduced the formation of positioning convex.
As Fig. 8 and shown in Figure 9, the end of an end of limit spring 14 is welded on the sidewall of limiting stopper 151.Perhaps, the terminal bending of limit spring 14 is also stretched in the groove of limiting stopper 151 1 sides, is connected by welding or riveted joint between the end of limit spring 14 and the spring seat main body 152.
For the location of limit spring 14, can adopt structure shown in Figure 8, limit spring 14 and limiting stopper 151 are welded together.Perhaps, for strengthening the strength of connection between limit spring 14 and the spring seat main body 152, can be more optimally the terminal bending of limit spring 14, the bending end is embedded in the notch of spring seat main body 152, again to being riveted or welded between limit spring 14 and the spring seat main body 152, make the two fixedly connected, utilize the hook of limit spring 14 bending ends and spring seat main body 152 to add riveted joint/welding procedure, greatly strengthened adhesive strength between the two.
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 (10)
1. electric expansion valve, comprise: housing, be arranged on the magnet rotor (23) in the described housing, the mandrel screw rod (20) that is connected with magnet rotor (23), and be fixedly installed on the nut seat (26) that is threaded with described mandrel screw rod (20) in the described housing, it is characterized in that, also comprise: thrust spring (17), along the described mandrel screw rod of axis bias voltage (20).
2. electric expansion valve according to claim 1 is characterized in that, the upper end of described housing has cover plate (16), and described electric expansion valve also comprises: spring seat (15) is the tubular structure of lower ending opening, and is arranged at the lower end of described cover plate (16);
Described thrust spring (17) is arranged in the described housing, is positioned between described spring seat (15) and the described mandrel screw rod (20), and applies pressure to the top of described mandrel screw rod (20) downwards.
3. electric expansion valve according to claim 2, it is characterized in that, what described mandrel screw rod (20) comprised screw rod main body (22) and was fixed in described screw rod main body (22) top leads moving plate (21), the described moving plate (21) of leading is L-shaped, comprise horizontal ends and vertical end, its horizontal ends is fixedlyed connected with described screw rod main body (22), and an end of described thrust spring (17) applies pressure to the described horizontal ends of leading moving plate (21).
4. electric expansion valve according to claim 3 is characterized in that, described spring seat (15) comprises spring seat main body (152) and pad (153), and described pad (153) is arranged between described spring seat main body (152) and the described thrust spring (17).
5. electric expansion valve according to claim 4 is characterized in that, described electric expansion valve also comprises limit spring (14), and described limit spring (14) is arranged on the outer wall of described spring seat main body (152).
6. electric expansion valve according to claim 5, it is characterized in that, described electric expansion valve also comprises helical spacing back-up ring (13), described spacing back-up ring (13) is arranged in the pitch groove of described limit spring (14), first end of described spacing back-up ring (13) is protruding in the described pitch groove, and the horizontal equivalent of the shaft axis of the described spring seat main body of the end-to-end distance of first end of described spacing back-up ring (13) (152) is greater than the horizontal equivalent of the shaft axis of the described described spring seat main body of vertical end distance (152) of leading moving plate (21).
7. electric expansion valve according to claim 6 is characterized in that, the lower end of described spring seat main body (152) is provided with the limiting stopper (151) of second end of the described spacing back-up ring of backstop (13).
8. electric expansion valve according to claim 7, it is characterized in that described limiting stopper (151) is for the projection of the impact extrusion on the sidewall of the lower end of described spring seat main body (152) or for the cutting flange projection on the sidewall of the lower end of described spring seat main body (152) or be the solder-bump in the groove that is welded in described spring seat main body (152) lower end.
9. electric expansion valve according to claim 8 is characterized in that, the end of an end of described limit spring (14) is welded on the sidewall of described limiting stopper (151).
10. electric expansion valve according to claim 8, it is characterized in that, the terminal bending of described limit spring (14) is also stretched in the groove of described limiting stopper (151) one sides, is connected by welding or riveted joint between the end of described limit spring (14) and the described spring seat main body (152).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020601088 CN201891900U (en) | 2010-11-10 | 2010-11-10 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020601088 CN201891900U (en) | 2010-11-10 | 2010-11-10 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201891900U true CN201891900U (en) | 2011-07-06 |
Family
ID=44221377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020601088 Expired - Fee Related CN201891900U (en) | 2010-11-10 | 2010-11-10 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201891900U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278841A (en) * | 2011-07-28 | 2011-12-14 | 浙江盾安禾田金属有限公司 | Method for preventing valve core position of electronic expansion valve from offsetting and corresponding protective cover |
| CN102287536A (en) * | 2011-07-27 | 2011-12-21 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN106286936A (en) * | 2015-06-25 | 2017-01-04 | 浙江盾安禾田金属有限公司 | Electric expansion valve |
| CN107542966A (en) * | 2016-06-29 | 2018-01-05 | 株式会社不二工机 | Motor-driven valve |
| CN108119699A (en) * | 2016-11-30 | 2018-06-05 | 盾安环境技术有限公司 | A kind of pilot valve and main valve attachment structure and air conditioning system for vehicle electric expansion valve |
| CN109990100A (en) * | 2019-05-05 | 2019-07-09 | 苏州市职业大学 | A kind of mechanical temperature control shut-off valve and vapor sampling device |
| CN112824689A (en) * | 2019-11-21 | 2021-05-21 | 盾安环境技术有限公司 | Nut assembly and electronic expansion valve |
| WO2021196900A1 (en) * | 2020-03-30 | 2021-10-07 | 浙江盾安人工环境股份有限公司 | Nut assembly and electronic expansion valve |
| US11946555B2 (en) | 2019-05-10 | 2024-04-02 | Zhejiang Dunan Artificial Environment Co., Ltd. | Nut assembly for electronic expansion valve, electronic expansion valve, and limiting element mounting method |
-
2010
- 2010-11-10 CN CN 201020601088 patent/CN201891900U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287536A (en) * | 2011-07-27 | 2011-12-21 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN102278841A (en) * | 2011-07-28 | 2011-12-14 | 浙江盾安禾田金属有限公司 | Method for preventing valve core position of electronic expansion valve from offsetting and corresponding protective cover |
| CN102278841B (en) * | 2011-07-28 | 2013-04-17 | 浙江盾安禾田金属有限公司 | Method for preventing valve core position of electronic expansion valve from deviation and corresponding protective cover |
| CN106286936A (en) * | 2015-06-25 | 2017-01-04 | 浙江盾安禾田金属有限公司 | Electric expansion valve |
| CN106286936B (en) * | 2015-06-25 | 2019-12-03 | 浙江盾安禾田金属有限公司 | Electric expansion valve |
| CN107542966A (en) * | 2016-06-29 | 2018-01-05 | 株式会社不二工机 | Motor-driven valve |
| CN108119699A (en) * | 2016-11-30 | 2018-06-05 | 盾安环境技术有限公司 | A kind of pilot valve and main valve attachment structure and air conditioning system for vehicle electric expansion valve |
| CN109990100A (en) * | 2019-05-05 | 2019-07-09 | 苏州市职业大学 | A kind of mechanical temperature control shut-off valve and vapor sampling device |
| US11946555B2 (en) | 2019-05-10 | 2024-04-02 | Zhejiang Dunan Artificial Environment Co., Ltd. | Nut assembly for electronic expansion valve, electronic expansion valve, and limiting element mounting method |
| CN112824689A (en) * | 2019-11-21 | 2021-05-21 | 盾安环境技术有限公司 | Nut assembly and electronic expansion valve |
| CN112824689B (en) * | 2019-11-21 | 2022-05-13 | 盾安环境技术有限公司 | Nut assembly and electronic expansion valve |
| WO2021196900A1 (en) * | 2020-03-30 | 2021-10-07 | 浙江盾安人工环境股份有限公司 | Nut assembly and electronic expansion 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 |