CN203098901U - Valve needle assembly and electronic expansion valve comprising same - Google Patents
Valve needle assembly and electronic expansion valve comprising same Download PDFInfo
- Publication number
- CN203098901U CN203098901U CN2012207198024U CN201220719802U CN203098901U CN 203098901 U CN203098901 U CN 203098901U CN 2012207198024 U CN2012207198024 U CN 2012207198024U CN 201220719802 U CN201220719802 U CN 201220719802U CN 203098901 U CN203098901 U CN 203098901U
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- China
- Prior art keywords
- needle assembly
- seal
- needle
- spool
- valve
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a needle subassembly, it includes seal and case. A lower accommodating chamber is formed in a lower portion of the sealing body, and the valve body includes an accommodated portion accommodated in the lower accommodating chamber of the sealing body and a needle protruding from the accommodated portion. According to the utility model discloses a needle subassembly realizes the regulation to the fluidic of flowing through the valve needle subassembly through the needle on the case to realize the good sealing between needle subassembly and the disk seat through the seal. In addition, because the accommodated part of the valve needle assembly is accommodated in the lower accommodating cavity in the sealing body, the joint part between the valve core and the sealing body forms a self-sealing system, thereby completely isolating the communication between the fluid inlet and the fluid outlet of the electronic expansion valve adopting the valve needle assembly.
Description
Technical field
The utility model relates to a kind of needle assembly, particularly a kind of needle assembly that is used for electric expansion valve with good seal performance and flow linear regulating function.Also relate to the electric expansion valve that comprises this needle valve assembly.
Background technique
Electric expansion valve is the vitals in the cooling/heating system, is mainly used in the flow of refrigerant fluid is regulated.In traditional electric expansion valve, adopt needle-valve that the flow of the fluid that flows through electric expansion valve is regulated usually.In order to realize accurate adjusting, the sealing particular importance between needle-valve and the valve seat to flow.
In existing electric expansion valve, in order to realize accurate adjusting to flow, usually adopt the cone-shaped metal needle, can come the size of the aperture in the hole on the regulating valve seat by the distance of regulating between tapered needle valve and the valve seat, thereby regulate the flow of the fluid that flows through electric expansion valve.Because in order to ensure degree of regulation, valve seat is also made by metallic material usually, but the sealing of this structure is relatively poor, exist bigger fluid to reveal between valve seat and needle, so it is only applicable in the not high application of sealing requirements.In addition, in order to improve the sealing between needle and the valve seat, adopt the needle of making by plastic material.Though the sealing of this needle is better, be difficult to realize the linearly adjust of flow, therefore control flows is crossed the flow of the fluid of electric expansion valve exactly.Therefore, need a kind of sealability better and can realize the needle and the corresponding electric expansion valve of the linearly adjust of flow in the prior art.
The model utility content
According to aspect of the utility model, a kind of needle assembly is provided, it comprises seal and spool.Be formed with the bottom holding cavity in the bottom of seal, spool comprise be contained in seal the bottom holding cavity in by holding part and needle from being given prominence to by holding part.
According to another embodiment of needle assembly of the present utility model, spool by the outer circumferential face of holding part on be formed with and be used to the convex structure that prevents that spool from deviating from from the bottom holding cavity.
In the also embodiment according to needle assembly of the present utility model, above-mentioned convex structure is for around first annular flange flange that is provided with by the outer circumferential face of holding part.
According to another embodiment of needle assembly of the present utility model, above-mentioned first annular flange flange is the tapered taper of direction of being inserted to the bottom of seal holding cavity by holding part along spool.
In another embodiment according to needle assembly of the present utility model, being contained in fully in the holding cavity of bottom of spool by holding part.
Also embodiment according to needle assembly of the present utility model is provided with reinforcer on the top of seal.
In another embodiment according to needle assembly of the present utility model, reinforcer combines by the protuberance outstanding from its underpart and the top holding cavity and the seal that are formed on the top of seal.
According to another embodiment of needle assembly of the present utility model, on the outer circumferential face of protuberance, be formed with the convex structure that prevents that reinforcer from deviating from from the top holding cavity.
In another embodiment according to needle assembly of the present utility model, second annular flange flange that above-mentioned convex protrusion shape structure is provided with for the outer circumferential face around protuberance.
According to another embodiment of needle assembly of the present utility model, second annular flange flange is the tapered taper of direction of inserting to the top of seal holding cavity along the protuberance of reinforcer.
In also embodiment, be formed with the top bigger on the top of seal than the lateral cross section of seal according to needle assembly of the present utility model.
According to another embodiment of needle assembly of the present utility model, its needle is taper.
In another embodiment according to needle assembly of the present utility model, the Young's modulus of seal is less than the Young's modulus of spool.
According to also embodiment of needle assembly of the present utility model, seal is made by elastic material.
In another embodiment according to needle assembly of the present utility model, spool is made by rigid material.
Comprise seal and spool according to needle assembly of the present utility model, not only can be by the excellent sealing of seal realization to the needle assembly, and the flow of accurately regulating the fluid that flows through the needle assembly by the needle on the spool, and any one wearing and tearing that can be in seal or spool or when damaging, only the parts that damage are changed, and need not whole needle assembly is changed, can save material thus and save cost.
According on the other hand of the present utility model, a kind of electric expansion valve also is provided, the needle assembly that it comprises valve seat and matches with valve seat, wherein, this needle assembly is aforesaid needle assembly.
According to an embodiment of electric expansion valve of the present utility model, the needle assembly is sat and is put on valve seat, and passes through the end surface and the valve seat formation sealing of the seal of needle assembly.
Description of drawings
By following description, one or more embodiment's of the present utility model feature and advantage will be understood more easily with reference to accompanying drawing.In order to be clearly shown that the detailed structure according to needle assembly of the present utility model more, each accompanying drawing is not drawn according to the actual size ratio, in the accompanying drawings:
Fig. 1 is the front view according to the broken section of electric expansion valve of the present utility model;
Fig. 2 is the enlarged view of the broken section part shown in Fig. 1;
Fig. 3 is the perspective view according to an embodiment's of the present utility model needle assembly;
Fig. 4 is the sectional view of needle assembly shown in Figure 3;
Fig. 5 is the perspective view that is used for according to the spool of needle assembly of the present utility model;
Fig. 6 is the perspective view according to another embodiment's of the present utility model needle assembly;
Fig. 7 is the sectional view of the assembly of needle shown in Fig. 6;
Fig. 8 is the perspective view that is used for according to the reinforcer of needle assembly of the present utility model;
Fig. 9 is the sectional view according to another embodiment's of the present utility model needle assembly; And
Figure 10 is according to the also sectional view of an embodiment's needle assembly of the present utility model.
Embodiment
Following description of preferred embodiments only is exemplary, and never is the restriction to the utility model and application or usage.
In the process that embodiment of the present utility model is described, the diagrammatic sketch that the directional terminology that is adopted " top " or " top " refer to electric expansion valve that illustrates or needle assembly is the orientation at the more close diagrammatic sketch of reference top; And to refer to diagrammatic sketch with the electric expansion valve that illustrates or needle assembly be orientation with reference to more close diagrammatic sketch bottom directional terminology " below " or " bottom ".
Basic structure and the working principle of brief description according to electric expansion valve 10 of the present utility model sees figures.1.and.2.The main working parts of electric expansion valve 10 comprises driven unit 10-1 and executive module 10-2, and driven unit 10-1 can comprise the combination of stepper motor or stepper motor and electromagnetic coil.The executive module 10-2 of electric expansion valve 10 comprises needle assembly 20 that is arranged in the valve body 12 and the valve seat 18 that matches with needle assembly 20.Stepper motor is used to control the size of the aperture of electric expansion valve 10, thereby regulates the flow of the fluid that flows through electric expansion valve 10.Electromagnetic coil is used for providing safety protection for electric expansion valve 10 when power failure.When electric expansion valve 10 normal runnings, fluid is from flowing into pipeline 30 flows into electric expansion valves 10 via the inlet 34 of the electric expansion valve 10 that is connected with inflow pipeline 30 valve pocket, fluid in the valve pocket is by the matching gap between needle assembly 20 and the valve seat 18, then via outlet 36 with the outlet 36 outflow pipelines that are connected 32 discharge electric expansion valves 10.
As in enlarged view shown in Figure 2, can more clearly seeing the structure of the executive module 10-2 of electric expansion valve 10.From electric expansion valve shown in Figure 2 10 analyse and observe the part as can be seen the valve body branch of electric expansion valve 10 comprise needle assembly 20 that cooperatively interacts and the valve seat 18 that is positioned at valve body 12, needle assembly 20 is sat and is put on valve seat 18, needle assembly 20 is fixed in the end of sleeve 14 by retaining ring 16, and with sleeve 14 move with away from or near valve seat 18, thereby cross the flow of the fluid of electric expansion valve 10 by the needle control flows that cooperates with valve seat 18 of needle assembly 20.14 in sleeve is driven via the screw-thread fit between screw rod and the sleeve 14 by screw rod driven by stepper motors, screw-thread fit between this screw rod and sleeve 14 converts rotatablely moving of stepper motor the linear motion of sleeve 14 to, moves up and down thereby drive needle assembly 20.
Below describe structure in detail according to needle assembly 20 of the present utility model.As shown in Figure 3 and Figure 4, comprise seal 22 according to needle assembly 20 of the present utility model and be contained in spool 24 in the bottom holding cavity 221 of seal 22.From the sectional view of Fig. 4 as can be seen, spool 24 comprise in the bottom holding cavity 221 that fully is contained in seal 22 by holding part 242 and from by holding part 242 along the tapered needle valve 241 that extends away from the direction of seal 22.Advantageously, be contained in bottom holding cavity 221 interior being recessed in the bottom holding cavity 221 of seal 22 by the lower surface of holding part 242, that is to say, when in the bottom holding cavity 221 that is contained in seal 22 by holding part 242 of spool 24, form annular recess in the position that seal 22 combines with spool 24, needle 241 protrudes downwards from the center of annular recess.Further advantageously, the outer circumferential face by holding part 242 of spool 24 is provided with and is used to the convex structure that prevents that spool 24 from deviating from from the bottom holding cavity 221 of seal 22.At this, the above-mentioned convex structure that prevents that spool 24 from deviating from from bottom holding cavity 221 can be distributed in spool 24 by the double wedge on the outer circumferential face of holding part 242, this double wedge can be a plurality of independent tooth that is distributed in discretely by on the outer circumferential face of holding part 242; The convex structure also can be first annular flange flange 244 that edge is as shown in Figure 5 arranged continuously by the outer circumferential face of holding part 242.In this embodiment, first annular flange flange 244 is the tapered taper of direction of being inserted to the bottom of seal 22 holding cavity 221 by holding part 242 along spool 24.Therefore, when needs are assembled together spool 24 and seal 22, can be with being inserted easily in the bottom holding cavity 221 of seal 22 of spool 24 by holding part 242, and can prevent that spool 24 from deviating from seal 22.In addition, when first annular flange flange 244 that adopts as shown in Figure 5, can also improve the sealing between spool 24 and the seal 22.
In according to embodiment of the present utility model, the Young's modulus of seal 22 is less than the Young's modulus of spool 24.Seal 22 is an elastic sealed body, particularly the part that contacts with valve seat 18 of seal 22 is flexible, can form the excellent sealing between the seal 22 of valve seat 18 and needle assembly 20 thus, that is to say that end surface and valve seat 18 by seal 22 form sealing, at this, seal 22 is such as being made or be made by other elastic materials by rubber material.Therefore, when needs were closed electric expansion valve 10, the lower end surface of the elastic sealed body 22 of needle assembly 20 and the upper surface of valve seat 18 formed tight seal, thereby can stop passing through of fluid fully.In addition, advantageously, spool 24 is the rigidity spool, and it can be a metal spool, such as stainless steel spool or copper spool.Spool 24 can be the integral type spool of being made by rigid material, also can be by respectively by being assembled by holding part 242 and needle 241 that rigid material is made.Because the spool 24 of needle assembly 20 is rigidity, therefore, the tapered needle valve 241 of needle assembly 20 can by away from or regulate flow linearly by the fluid of electric expansion valve 10 near the hole on the valve seat 18, thereby regulate electric expansion valve 10 in point-device mode.Further, because being contained in fully by holding part 242 in the bottom holding cavity 221 of seal 22 of spool 24, and seal by being positioned at of seal 22 by the part in the outside of holding part 242, therefore, even place, the connecting part between spool 24 and seal 22 exists fluid to reveal, the fluid of revealing is also in the outlet 36 with return electron expansion valve 10, and can not be communicated with at formation fluid between the inlet 34 of electric expansion valve 10 and the outlet 36.For needle assembly 20 being firmly held in the sleeve 14, be formed with relatively bigger top 223 of lateral cross section on the top of seal 22, for example be formed with the diameter cylindricality top 223 bigger than seal 22 on the top of cylindricality seal 22.Can by make retaining ring 16 be arranged between sleeve 14 and the needle assembly 20 cylindricality top 223 below, thereby seal 22 more stably can be remained in the end of sleeve 14.
Owing to, adopted flexible seal 22 at this in order to improve the sealability of seal 22.But elastic sealed body 22 in use can deform, and causes the validity of the displacement when it is activated to be affected.For this reason, be provided with reinforcer 26 at the top of seal 22, as shown in Figure 6, reinforcer 26 is arranged on the top at the relatively bigger cylindricality top 223 of the diameter of seal 22.The shape and size at the cylindricality top 223 of the shape and size of reinforcer 26 and seal 22 are basic identical, such as the diameter identical central portion of reinforcer 26 employings with the cylindricality top 223 of seal 22.Reinforcer 26 combines with seal 22 by the top holding cavity 222 protuberance of giving prominence to from its lower surface 261 and the top that is formed on seal 22.Advantageously, on the outer circumferential face of the protuberance 261 of reinforcer 26, be formed with the convex structure that prevents that reinforcer 26 and seal 22 break away from, the convex structure is such as being a series of independent tooth from the outer circumferential face upper process of protuberance 261, perhaps the convex structure can be the tapered tapered flanges of inserting to the top of seal 22 holding cavity 222 along the protuberance 261 of reinforcer 26 of direction for second annular flange flange, 262, the second annular flange flange 262 on the outer circumferential face that is arranged on protuberance 261 as shown in Figure 8.Second annular flange flange 262 on the reinforcer 26 can have identical structure with first annular flange flange 244 on being formed on spool 24.Certainly, reinforcer 26 also can adopt other Placements that can combine securely with seal 22.When seal 22 is simple cylindrical shape, do not have the bigger cylindricality top 223 of lateral cross section such as seal 22, as Fig. 9 and shown in Figure 10, seal 22 among Fig. 9 does not have reinforcer 26, reinforcer 26 among Figure 10 directly is combined in the top of seal 22 and has the shape identical with the top of seal 22, such as the circle that is same size; When seal 22 had the cylindricality top 223 of larger diameter, then reinforcer 26 was combined in the top at cylindricality top 233 as illustrated in fig. 7, and had the shape identical with cylindricality top 223, such as the circle that is same size.
Can be according to needle assembly 20 of the present utility model by the sealing between seal 22 realization needle assemblies 20 and the valve seat 18, when electric expansion valve 10 is closed, can realize the fluid isolation completely between its inlet 34 and the outlet 36, not exist any fluid between inlet 34 and the outlet 36 to reveal.In addition, because the bottom holding cavity 221 interior joining portion by between holding part 242 and the bottom holding cavity 221 that are arranged on seal 22 are exposed to the outlet 36 of electric expansion valve 10 fully, that is to say, seal 22 and spool 24 form the selfsealings system with respect to valve seat 18, therefore, even it is tight inadequately by the sealing between holding part 242 and the bottom holding cavity 221, the fluid of Guo Luing can not be communicated with the fluid at inlet 34 places yet thus, therefore can guarantee the inlet 34 of electric expansion valve 10 and the fluid isolation between the outlet 36.In addition, the reinforcer 26 on the top by being arranged on seal 22 can improve the intensity of seal 22, thereby can just can cross the flow of the fluid of electric expansion valve 10 with higher precision control flows with the motion of higher precision control valve needle assemblies 20.
Although described various mode of execution of the present utility model in detail at this; but should be appreciated that the utility model is not limited to the embodiment of describing in detail and illustrating here; can make various modifications and variations by those skilled in the art under the situation that does not depart from essence of the present utility model and scope, all these improve and modification all falls in the claimed scope of the utility model.Further, all parts described in this article or member can be substituted by miscellaneous part that is equal to it on 26S Proteasome Structure and Function or member.
Claims (17)
1. a needle assembly (20) is characterized in that, described needle assembly (20) comprising:
Seal (22), be formed with in the bottom of described seal (22) bottom holding cavity (221) and
Spool (24), described spool (24) comprise in the described bottom holding cavity (221) that is contained in described seal (22) by holding part (242) and from described by the outstanding needle (241) of holding part (242).
2. needle assembly as claimed in claim 1 (20) wherein, is formed with on by the outer circumferential face of holding part (242) described spool (24) described and is used to the convex structure that prevents that described spool (24) from deviating from from described bottom holding cavity (221).
3. needle assembly as claimed in claim 2 (20), wherein, described convex structure is for centering on described first annular flange flange (244) that is provided with by the outer circumferential face of holding part (242).
4. needle assembly as claimed in claim 3 (20), wherein, described first annular flange flange (244) is the described tapered taper of direction of being inserted to the described bottom of described seal (22) holding cavity (221) by holding part (242) along described spool (24).
5. needle assembly as claimed in claim 1 (20), wherein, the described of described spool (24) is contained in the described bottom holding cavity (221) fully by holding part (242).
6. needle assembly as claimed in claim 1 (20) wherein, is provided with reinforcer (26) on the top of described seal (22).
7. needle assembly as claimed in claim 6 (20), wherein, described reinforcer (26) combines by protuberance (261) outstanding from its underpart and the top holding cavity (222) and the described seal (22) that are formed on the top of described seal (22).
8. needle assembly as claimed in claim 7 (20) wherein, is formed with the convex structure that prevents that described reinforcer (26) from deviating from from described top holding cavity (222) on the outer circumferential face of described protuberance (261).
9. needle assembly as claimed in claim 8 (20), wherein, second annular flange flange (262) that described convex structure is provided with for the outer circumferential face around described protuberance (261).
10. needle assembly as claimed in claim 9 (20), wherein, described second annular flange flange (262) is the tapered taper of direction of inserting to the described top of described seal (22) holding cavity (222) along the described protuberance (261) of described reinforcer (26).
11., wherein, be formed with the top (223) bigger on the top of described seal (22) than the lateral cross section of described seal (22) as claim 1 or 6 described needle assemblies (20).
12. needle assembly as claimed in claim 1 (20), wherein, described needle (241) is taper.
13. needle assembly as claimed in claim 1 (20), wherein, the Young's modulus of described seal (22) is less than the Young's modulus of described spool (24).
14. needle assembly as claimed in claim 13 (20), wherein, described seal (22) is made by elastic material.
15. needle assembly as claimed in claim 14 (20), wherein, described spool (24) is made by rigid material.
16. an electric expansion valve (10) comprising:
Valve seat (18) and
Needle assembly with described valve seat (18) cooperates is characterized in that, described needle assembly is each described needle assembly (20) among the claim 1-15.
17. electric expansion valve as claimed in claim 16 (10), wherein, described needle assembly (20) is sat and is put on described valve seat (18), and passes through the end surface and described valve seat (18) the formation sealing of the seal (22) of described needle assembly (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207198024U CN203098901U (en) | 2012-12-24 | 2012-12-24 | Valve needle assembly and electronic expansion valve comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207198024U CN203098901U (en) | 2012-12-24 | 2012-12-24 | Valve needle assembly and electronic expansion valve comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203098901U true CN203098901U (en) | 2013-07-31 |
Family
ID=48850306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207198024U Expired - Lifetime CN203098901U (en) | 2012-12-24 | 2012-12-24 | Valve needle assembly and electronic expansion valve comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203098901U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883748A (en) * | 2012-12-24 | 2014-06-25 | 艾默生环境优化技术(苏州)有限公司 | Valve needle assembly and electronic expansion valve comprising same |
| CN104455566A (en) * | 2014-11-28 | 2015-03-25 | 温州大阳科技有限公司 | Automatic flow passage cleaning device used for valve |
| CN104455571A (en) * | 2014-11-28 | 2015-03-25 | 温州大阳科技有限公司 | Adjustable throttle valve with automatically-cleaned throttle flow passage |
-
2012
- 2012-12-24 CN CN2012207198024U patent/CN203098901U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883748A (en) * | 2012-12-24 | 2014-06-25 | 艾默生环境优化技术(苏州)有限公司 | Valve needle assembly and electronic expansion valve comprising same |
| CN103883748B (en) * | 2012-12-24 | 2016-05-11 | 艾默生环境优化技术(苏州)有限公司 | Valve needle assembly and electronic expansion valve comprising same |
| CN104455566A (en) * | 2014-11-28 | 2015-03-25 | 温州大阳科技有限公司 | Automatic flow passage cleaning device used for valve |
| CN104455571A (en) * | 2014-11-28 | 2015-03-25 | 温州大阳科技有限公司 | Adjustable throttle valve with automatically-cleaned throttle flow passage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130731 Effective date of abandoning: 20160511 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130731 Effective date of abandoning: 20160511 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |