CN102287536A - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN102287536A CN102287536A CN2011102117321A CN201110211732A CN102287536A CN 102287536 A CN102287536 A CN 102287536A CN 2011102117321 A CN2011102117321 A CN 2011102117321A CN 201110211732 A CN201110211732 A CN 201110211732A CN 102287536 A CN102287536 A CN 102287536A
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- screw rod
- mandrel screw
- valve body
- nut seat
- valve
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Abstract
The invention discloses an electronic expansion valve, which comprises a valve body and a nut seat arranged on the valve body, wherein a central shaft screw rod is arranged in the nut seat, is in threaded fit with the nut seat and is moved up and down along the nut seat; a valve pin is arranged at the lower end of the central shaft screw rod and is driven by the central shaft screw rod to move up and down in the valve body so as to open or close an air outlet in the valve body; and a limit assembly for controlling the up-and-down movement travel range of the central shaft screw rod is arranged in the valve body and the nut seat. The electronic expansion valve has a simple structure, less parts and low manufacturing cost and simplifies production processes, so that a product is more environment-friendly during production, the production efficiency of the product during production is improved, and the flow consistency of the product during use is ensured.
Description
Technical field
The present invention relates to throttle element, particularly a kind of electric expansion valve.
Background technique
Electric expansion valve commonly used at present as shown in Figure 1, cover plate 01 is fixed on valve body 08 top by sleeve pipe 03, modes such as little axle 011 employing welding are fixed on the cover plate lower surface, limit spring 02 adopts modes such as riveted joint or spot welding to be fixed on the little axle, Sealing shield ring 012 is assemblied in the gap of limit spring and can be along the slippage of limit spring spiral, promptly Sealing shield ring is applied the shear force of circumferencial direction, Sealing shield ring can carry out spiral and move up and down in the gap of limit spring, screw thread-like cooperates, and all there is the stroke up and down that boss can the limit stop circle at the two ends up and down of limit spring, and such structure is the limit structure of prior art; Leading moving plate 013 in addition adopts modes such as welding or riveted joint to be fixed on mandrel screw rod 04 top end, the mandrel screw rod outer side surface is provided with the transmission outside thread, adopt interference between nut seat 05 and the valve body, modes such as riveted joint are fixedly connected, nut seat inside is provided with the transmission internal thread that cooperates with the transmission outside thread, mandrel screw rod is assemblied in nut seat inside and moves up and down by the relative nut seat of screw-thread fit transmission, in mandrel screw rod motion, Sealing shield ring is produced the active force of circumferencial direction by leading moving plate, the Sealing shield ring motion of in limit spring, spinning, in like manner, because limit spring has position-limiting action to Sealing shield ring,, therefore also limit leading the reaction force of moving plate by Sealing shield ring by the stroke up and down of limit spring to mandrel screw rod; Needle 016 is located by connecting on the mandrel screw rod bottom by valve pocket 06, and moving up and down of mandrel screw rod drives moving up and down of needle, thereby the sectional area of needle and air outlet 010 is changed, and reaches the purpose of control steam outlet pipe flow.For the flow conformity that makes electric expansion valve better, must guarantee that the sectional area conformity of needle and air outlet is better under the identical pulse situation, in said structure, because mandrel screw rod can rotate freely in nut seat, and Sealing shield ring also can rotate freely in limit spring, so the spacing position consistency of limit structure can not realize controlling effectively during practical set, guarantee by workman's experience and proficiency substantially, cause the flow conformity of electric expansion valve relatively poor.In addition, the Component of limit structure are more in the said structure, little axle with cover plate, lead moving plate and adopt the mode of welding to be connected substantially with mandrel screw rod, cost is more greatly and not environmental protection.
Summary of the invention
Problem to be solved by this invention just provides a kind of electric expansion valve, and is simple in structure, less, the low cost of manufacture of number of spare parts, simplify production technology, make production environmental protection more, the manufacturing efficiency when having improved production guarantees the flow conformity when product uses.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme: a kind of electric expansion valve, comprise valve body and the nut seat that is located on the valve body, in nut seat, be provided with mandrel screw rod, mandrel screw rod is connected with the nut seat screw-thread fit and moves up and down along nut seat, the mandrel screw rod lower end is provided with needle, needle is driven to move up and down in valve body by mandrel screw rod the air outlet in the valve body is opened or closed, and it is characterized in that: be provided with the spacing assembly that the control mandrel screw rod moves up and down stroke range in valve body and nut seat.Change the limit structure and the limit method of electric expansion valve, reduce component part, simplify production technology, guarantee the flow conformity of electric expansion valve when spacing.
Further, described spacing assembly comprise be located between nut seat and the mandrel screw rod control mandrel screw rod move up stroke range the upper limit structure and be located at valve body with the mandrel screw rod lower end between control the lower limit structure that mandrel screw rod moves down stroke range.
Further, described upper limit structure comprises the guide section that is located at nut seat endoporus top, nut seat endoporus bottom is provided with internal thread segment, mandrel screw rod bottom outer side surface is provided with the external thread section that cooperates with internal thread segment, the diameter of guide section is greater than the diameter of external thread section, when mandrel screw rod moves up when external thread section and internal thread segment being broken away from enter guide section, mandrel screw rod is flatted turn in guide section and is no longer moved up.
Further, described mandrel screw rod outer side surface is provided with the optical axis section that cooperates with guide section, and the optical axis section is positioned at the external thread section top, and the distance of end distance external thread section lower end is less than the distance of end distance guide section upper end on the internal thread segment under the optical axis section.When mandrel screw rod moves up when external thread section and internal thread segment being broken away from enter guide section, guarantee still deflection not of mandrel screw rod.
Further, described lower limit structure comprises the upper protruding block that axially is located on the mandrel screw rod lower end surface, be provided with lower valve sleeve below in valve body, being positioned at mandrel screw rod, it is corresponding with the air outlet that lower valve sleeve is passed in the lower end of needle, described lower limit structure also comprises the lower protruding block on the upper-end surface that axially is located at lower valve sleeve, the upper protruding block lower end surface is positioned at lower protruding block upper-end surface below, and when needle was against on the air outlet, a side of upper protruding block was against on the side of lower protruding block mandrel screw rod can not be rotated again.
Further, described mandrel screw rod lower end surface is provided with slide opening, the upper end of needle is installed in the slide opening and along slide opening slippage up and down, between the upper-end surface of needle and slide opening upper-end surface, be provided with the pressure spring that needle is promoted downwards, be provided with the upper valve sleeve affixed with mandrel screw rod in the lower end of slide opening, the upper end of needle is provided with radially that boss is stuck on the upper-end surface of upper valve sleeve.Pressure spring has certain cushion effect when making needle on arriving to the air outlet, avoid rigid collision between needle and the air outlet.
Further, described upper protruding block is located on the lower end surface of upper valve sleeve.The relative upper valve sleeve of mandrel screw rod requires and will grow some working life, and wearing and tearing are more between upper protruding block and the lower protruding block, upper protruding block is located at is convenient on the upper valve sleeve safeguard, change.
Further, be provided with valve housing between described valve body and the lower valve sleeve, lower valve sleeve is fixed in the valve body by valve housing, is provided with axial fluting on valve housing, and the pressure release equalizing orifice that the suction port on the valve body passes through to slot with on the valve body is communicated with.Fluting is used for the pressure balance of body cavity top and the bottom.
Further, described valve body is provided with the sleeve pipe that nut seat and mandrel screw rod are entangled, and the sleeve pipe upper end is provided with cover plate, is provided with between mandrel screw rod and the cover plate and pushes mandrel screw rod to preloading spring that nut seat makes external thread section and internal thread segment pretension.Preloading spring makes and still can be subjected to downward initial tension of spring after the external thread section debentition of mandrel screw rod.
Further, the upper-end surface of described mandrel screw rod is provided with the positioning boss of location preloading spring.Make the relative all the time coaxial or parallel axes of mandrel screw rod of preloading spring by positioning boss, make external thread section and internal thread segment enter the cooperation drive state fast.
After adopting technique scheme, the present invention has following advantage: existing relatively electric expansion valve reduced little axle, lead the Component that moving plate etc. influence the valve body height overall, and also minimizing relatively of component total quantity has simultaneously reduced the cost of raw material of product; Reduced little axle and welded and lead moving plate and weld this twice welding process, made and process of producing product environmental protection more also reduced production cost of products; The assembling of spacing assembly and to use all be that machining accuracy by Component guarantees, also lean on artificial experience and proficiency to guarantee substantially and influence the hidden danger of product performance with regard to the assembling of the position-limit mechanism of having eliminated existing electric expansion valve, also just reduce the operation of together spacing assembly assembling, improve the manufacturing efficiency of electric expansion valve, also guaranteed the flow conformity when product uses simultaneously.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is the structural representation of existing a kind of electric expansion valve;
Fig. 2 is the structural representation of an embodiment of the present invention;
Fig. 3 is that upper valve sleeve and lower valve sleeve cooperate schematic representation;
Fig. 4 is the plan view of valve seat cover.
Embodiment
The structural representation of an embodiment of the present invention shown in Fig. 2 to 4, a kind of electric expansion valve, comprise valve body 1 and the nut seat 2 that is located on the valve body, in nut seat, be provided with mandrel screw rod 3, mandrel screw rod is connected with the nut seat screw-thread fit and moves up and down along nut seat, the mandrel screw rod lower end is provided with needle 4, needle is driven to move up and down in valve body by mandrel screw rod the air outlet in the valve body 11 is opened or closed, and is provided with the spacing assembly that the control mandrel screw rod moves up and down stroke range in valve body and nut seat.Described spacing assembly comprise be located between nut seat and the mandrel screw rod control mandrel screw rod move up stroke range the upper limit structure and be located at valve body with the mandrel screw rod lower end between control the lower limit structure that mandrel screw rod moves down stroke range.
Described upper limit structure comprises the guide section 21 that is located at nut seat endoporus top, nut seat endoporus bottom is provided with internal thread segment 22, mandrel screw rod bottom outer side surface is provided with the external thread section 32 that cooperates with internal thread segment, the diameter of guide section is greater than the diameter of external thread section, when mandrel screw rod moves up when external thread section and internal thread segment being broken away from enter guide section, mandrel screw rod is flatted turn in guide section and is no longer moved up.The mandrel screw rod outer side surface is provided with the optical axis section 31 that cooperates with guide section, and the optical axis section is positioned at the external thread section top, and the distance of end distance external thread section lower end is less than the distance of end distance guide section upper end on the internal thread segment under the optical axis section.
Described lower limit structure comprises the upper protruding block 51 that axially is located on the mandrel screw rod lower end surface, be provided with lower valve sleeve 6 below in valve body, being positioned at mandrel screw rod, it is corresponding with the air outlet that lower valve sleeve is passed in the lower end of needle, described lower limit structure also comprises the lower protruding block 61 on the upper-end surface that axially is located at lower valve sleeve, the upper protruding block lower end surface is positioned at below, lower protruding block upper-end surface, when needle was against on the air outlet, a side of upper protruding block was against on the side of lower protruding block mandrel screw rod can not be rotated again.In the present embodiment, on the mandrel screw rod lower end surface, be provided with slide opening 33, the upper end of needle is installed in the slide opening and along slide opening slippage up and down, between the upper-end surface of needle and slide opening upper-end surface, be provided with the pressure spring 34 that needle is promoted downwards, be provided with the upper valve sleeve 5 affixed with mandrel screw rod in the lower end of slide opening, the upper end of needle is provided with radially that boss 35 is stuck on the upper-end surface of upper valve sleeve, and upper protruding block is located on the lower end surface of upper valve sleeve.
In the foregoing description, be provided with valve housing 7 between described valve body and the lower valve sleeve, lower valve sleeve is fixed in the valve body by valve housing, is provided with axial fluting 71 on valve housing, and the pressure release equalizing orifice 13 that the suction port 12 on the valve body passes through to slot with on the valve body is communicated with.Valve body is provided with the sleeve pipe 8 that nut seat and mandrel screw rod are entangled, and the sleeve pipe upper end is provided with cover plate 81, is provided with between mandrel screw rod and the cover plate and pushes mandrel screw rod to preloading spring 82 that nut seat makes external thread section and internal thread segment pretension; The upper-end surface of mandrel screw rod is provided with the positioning boss 83 of location preloading spring.
The normal operation of electric expansion valve of the present invention:
When electric expansion valve is closed, by the screw thread transmission mandrel screw rod is moved downwards, mandrel screw rod drives upper valve sleeve and moves downwards, when moving to the limit inferior position, be that the needle lower end is against on the air outlet, upper protruding block and lower protruding block form interference state, and promptly the side of upper protruding block and lower protruding block offsets, the restriction mandrel screw rod is rotated further, thereby the restriction mandrel screw rod continues operation downwards;
When electric expansion valve was opened, mandrel screw rod is operation upwards, when moving to the limes superiors position, be that external thread section breaks away from internal thread segment, mandrel screw rod is flatted turn in nut seat inside, but can not make progress operation again, has also just realized the upwards effect of operation of restriction mandrel screw rod.In addition because mandrel screw rod upper end is provided with preloading spring, make still can be subjected to downward initial tension of spring after mandrel screw rod and the nut seat debentition, make when electric expansion valve is closed that external thread section can enter internal thread segment fast and cooperate transmission.
Except that above preferred embodiment, the present invention also has other mode of execution, and those skilled in the art can make various changes and distortion according to the present invention, only otherwise break away from spirit of the present invention, all should belong to the defined scope of claims of the present invention.
Claims (10)
1. electric expansion valve, comprise valve body (1) and be located at nut seat (2) on the valve body, in nut seat, be provided with mandrel screw rod (3), mandrel screw rod is connected with the nut seat screw-thread fit and moves up and down along nut seat, the mandrel screw rod lower end is provided with needle (4), needle is driven to move up and down in valve body by mandrel screw rod the air outlet in the valve body (11) is opened or closed, and it is characterized in that: be provided with the spacing assembly that the control mandrel screw rod moves up and down stroke range in valve body and nut seat.
2. a kind of electric expansion valve according to claim 1 is characterized in that: described spacing assembly comprise be located between nut seat and the mandrel screw rod control mandrel screw rod move up stroke range the upper limit structure and be located at valve body with the mandrel screw rod lower end between control the lower limit structure that mandrel screw rod moves down stroke range.
3. a kind of electric expansion valve according to claim 2, it is characterized in that: described upper limit structure comprises the guide section (21) that is located at nut seat endoporus top, nut seat endoporus bottom is provided with internal thread segment (22), mandrel screw rod bottom outer side surface is provided with the external thread section (32) that cooperates with internal thread segment, the diameter of guide section is greater than the diameter of external thread section, when mandrel screw rod moves up when external thread section and internal thread segment being broken away from enter guide section, mandrel screw rod is flatted turn in guide section and is no longer moved up.
4. a kind of electric expansion valve according to claim 3, it is characterized in that: described mandrel screw rod outer side surface is provided with the optical axis section (31) that cooperates with guide section, the optical axis section is positioned at the external thread section top, and the distance of end distance external thread section lower end is less than the distance of end distance guide section upper end on the internal thread segment under the optical axis section.
5. a kind of electric expansion valve according to claim 2, it is characterized in that: described lower limit structure comprises the upper protruding block (51) that axially is located on the mandrel screw rod lower end surface, be provided with lower valve sleeve (6) below in valve body, being positioned at mandrel screw rod, it is corresponding with the air outlet that lower valve sleeve is passed in the lower end of needle, described lower limit structure also comprises the lower protruding block (61) on the upper-end surface that axially is located at lower valve sleeve, the upper protruding block lower end surface is positioned at below, lower protruding block upper-end surface, when needle was against on the air outlet, a side of upper protruding block was against on the side of lower protruding block mandrel screw rod can not be rotated again.
6. a kind of electric expansion valve according to claim 5, it is characterized in that: described mandrel screw rod lower end surface is provided with slide opening (33), the upper end of needle is installed in the slide opening and along slide opening slippage up and down, between the upper-end surface of needle and slide opening upper-end surface, be provided with the pressure spring (34) that needle is promoted downwards, be provided with the upper valve sleeve affixed with mandrel screw rod (5) in the lower end of slide opening, the upper end of needle is provided with radially that boss (35) is stuck on the upper-end surface of upper valve sleeve.
7. a kind of electric expansion valve according to claim 6 is characterized in that: described upper protruding block is located on the lower end surface of upper valve sleeve.
8. a kind of electric expansion valve according to claim 6, it is characterized in that: be provided with valve housing (7) between described valve body and the lower valve sleeve, lower valve sleeve is fixed in the valve body by valve housing, be provided with axial fluting (71) on valve housing, the pressure release equalizing orifice (13) that the suction port on the valve body (12) passes through to slot with on the valve body is communicated with.
9. a kind of electric expansion valve according to claim 1, it is characterized in that: described valve body is provided with the sleeve pipe (8) that nut seat and mandrel screw rod are entangled, the sleeve pipe upper end is provided with cover plate (81), is provided with between mandrel screw rod and the cover plate and pushes mandrel screw rod to preloading spring (82) that nut seat makes external thread section and internal thread segment pretension.
10. a kind of electric expansion valve according to claim 9 is characterized in that: the upper-end surface of described mandrel screw rod is provided with the positioning boss (83) of location preloading spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110211732 CN102287536B (en) | 2011-07-27 | 2011-07-27 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110211732 CN102287536B (en) | 2011-07-27 | 2011-07-27 | Electronic expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102287536A true CN102287536A (en) | 2011-12-21 |
| CN102287536B CN102287536B (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110211732 Active CN102287536B (en) | 2011-07-27 | 2011-07-27 | Electronic expansion valve |
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| CN (1) | CN102287536B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865399A (en) * | 2012-09-11 | 2013-01-09 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| WO2013127276A1 (en) * | 2012-02-28 | 2013-09-06 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
| CN106726339A (en) * | 2015-11-20 | 2017-05-31 | 沈阳新松机器人自动化股份有限公司 | A kind of spring reverse motion and the leg training device using the spring reverse motion |
| CN107631033A (en) * | 2016-07-19 | 2018-01-26 | 株式会社鹭宫制作所 | Motor-driven valve |
| CN107939981A (en) * | 2017-12-21 | 2018-04-20 | 海杰亚（北京）医疗器械有限公司 | The low temperature electric control valve and adjusting method of preload adjustable |
| CN108343777A (en) * | 2017-01-25 | 2018-07-31 | 株式会社鹭宫制作所 | Motor-driven valve and refrigerating circulation system |
| CN108662169A (en) * | 2017-03-27 | 2018-10-16 | 盾安环境技术有限公司 | A kind of electric expansion valve |
| CN108779869A (en) * | 2016-03-29 | 2018-11-09 | 株式会社鹭宫制作所 | Motor-driven valve and refrigerating circulation system |
| CN109538772A (en) * | 2017-09-21 | 2019-03-29 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| CN110836270A (en) * | 2018-08-17 | 2020-02-25 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN111059296A (en) * | 2018-10-17 | 2020-04-24 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
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| CN101629649A (en) * | 2008-07-16 | 2010-01-20 | 株式会社鹭宫制作所 | Electric valve |
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| JPH10292876A (en) * | 1997-04-18 | 1998-11-04 | Fujitsu General Ltd | Electronic expansion valve |
| CN2526754Y (en) * | 2002-03-07 | 2002-12-18 | 浙江正东机车部件有限公司 | Electronic expansion valve for frequency change air conditioner |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127276A1 (en) * | 2012-02-28 | 2013-09-06 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
| US9435451B2 (en) | 2012-02-28 | 2016-09-06 | Emerson Climate Technologies (Suzhou) Co., Ltd. | Electronic expansion valve |
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| CN102865399B (en) * | 2012-09-11 | 2015-07-22 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN106726339A (en) * | 2015-11-20 | 2017-05-31 | 沈阳新松机器人自动化股份有限公司 | A kind of spring reverse motion and the leg training device using the spring reverse motion |
| CN108779869B (en) * | 2016-03-29 | 2020-01-24 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| CN108779869A (en) * | 2016-03-29 | 2018-11-09 | 株式会社鹭宫制作所 | Motor-driven valve and refrigerating circulation system |
| CN107631033A (en) * | 2016-07-19 | 2018-01-26 | 株式会社鹭宫制作所 | Motor-driven valve |
| CN108343777A (en) * | 2017-01-25 | 2018-07-31 | 株式会社鹭宫制作所 | Motor-driven valve and refrigerating circulation system |
| CN108343777B (en) * | 2017-01-25 | 2019-06-18 | 株式会社鹭宫制作所 | Motor-driven valve and refrigerating circulation system |
| CN108662169A (en) * | 2017-03-27 | 2018-10-16 | 盾安环境技术有限公司 | A kind of electric expansion valve |
| CN108662169B (en) * | 2017-03-27 | 2021-12-21 | 盾安环境技术有限公司 | Electronic expansion valve |
| CN109538772A (en) * | 2017-09-21 | 2019-03-29 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| CN107939981A (en) * | 2017-12-21 | 2018-04-20 | 海杰亚（北京）医疗器械有限公司 | The low temperature electric control valve and adjusting method of preload adjustable |
| CN107939981B (en) * | 2017-12-21 | 2023-12-22 | 海杰亚（北京）医疗器械有限公司 | Low-temperature electric regulating valve with adjustable pretightening force and regulating method |
| CN110836270A (en) * | 2018-08-17 | 2020-02-25 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN110836270B (en) * | 2018-08-17 | 2021-09-28 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN111059296A (en) * | 2018-10-17 | 2020-04-24 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN111059296B (en) * | 2018-10-17 | 2022-02-08 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
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| CN102287536B (en) | 2013-03-20 |
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