CN104896810A - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN104896810A CN104896810A CN201410077071.1A CN201410077071A CN104896810A CN 104896810 A CN104896810 A CN 104896810A CN 201410077071 A CN201410077071 A CN 201410077071A CN 104896810 A CN104896810 A CN 104896810A
- Authority
- CN
- China
- Prior art keywords
- nut
- valve
- core case
- valve core
- electric expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/52—Means for additional adjustment of the rate of flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
Abstract
The invention provides an electronic expansion valve. The electronic expansion valve comprises a valve base module, a nut module and a valve needle-lead screw module, wherein the valve base module comprises a valve base and a valve core base; the nut module comprises a nut for mounting the valve needle-screw rod module; and the lower end of the nut and the upper end of the valve core base are in coating fit to form a tank for circulating a refrigerant. The lower end of the nut and the upper end of the valve core base fit to participate in the mounting guide of the valve core base and the coaxiality adjustment; and the tank formed between the inner cylinder wall of the nut and the outer cylinder wall of the valve core base provides a damping passage for circulating the refrigerant, so that the pressure balance can be realized more quickly and stably.
Description
Technical field
The present invention relates to field of Refrigeration and Air-conditioning, especially a kind of electric expansion valve for refrigeration plant.
Background technology
In air-conditioning, refrigerator, Teat pump boiler and all kinds of refrigeration, heating equipment, electric expansion valve (motor-driven valve) is usually adopted to regulate the flow of fluid.
Refer to a kind of motor-driven valve disclosed in No. 102454818Ath, Chinese invention patent application, comprise valve component, nut assembly, needle screw component and shell, described valve component comprises valve seat, valve core case, described nut assembly comprises the nut for installing described needle screw component, and the lower end of described nut is set with the upper end of described valve core case and coordinates.Described nut assembly is integrally formed with the endless metal brace welded with valve seat.Described brace is provided with for carrying out spacing outside breach to the afterbody of spring guide rail, and outside this, breach, also as the passage of refrigerant, plays the effect of the upper and lower pressure at both sides of balance brace simultaneously.The pressure balanced damping path of described motor-driven valve is: the partial valve needle outside the valve pocket part in shell, brace in breach and needle screw component.Because the pressure balanced speed when the drastic change of valve pocket pressure of breach outside brace is comparatively slow, cause the impact of screw mandrel to nut larger.
Given this, be necessary that a kind of new electric expansion valve of design solves the problems referred to above.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of electric expansion valve, and it effectively can solve the slower problem of pressure balanced speed.Following full text needs amendment.
For achieving the above object, the invention provides following technical scheme: a kind of electric expansion valve, comprise valve component, nut assembly, needle screw component, described valve component comprises valve seat, valve core case, described nut assembly comprises the nut for installing described needle screw component, the lower end of described nut is set with the upper end of valve core case and coordinates, the common groove formed for refrigerant circulation.
Further, the lower end of described nut has nut inner tube wall, and the upper end of described valve core case has valve core case outer tube wall, and described groove is formed between nut inner tube wall and valve core case outer tube wall.
Further, described groove body is opened in valve core case outer tube wall.
Further, described groove body is opened in nut seat inner tube wall.
Further, described groove has three, be distributed on valve core case outer tube wall or/and nut inner tube wall circumferentially.
Further, described brace does not arrange the damp channel of communication with cavity and rotor chamber, and described plastic nut is provided with the damping hole of communication with cavity and rotor chamber.
Further, the damping hole equivalent latus rectum described nut connecting rotor chamber is not more than the equivalent latus rectum of described groove.
Further, described electric expansion valve also comprises the valve port seat being located at valve seat, and described valve core case is fixedly connected with by welding or interference fit with valve port seat.
Further, described valve core case be circumferentially also provided with some side openings being communicated with the first tube connector and the second tube connector.
Further, the lower end of described nut is provided with nut end face, and after described nut and valve core case are set with and coordinate, described groove body part exposes nut end face.
Compared with prior art, the present invention at least has the following advantages: the installation guiding that the coordinating of described nut lower end and valve core case upper end can participate in valve core case and axiality adjust; The groove be arranged between described nut inner tube wall and valve core case outer tube wall then provides the damping path circulated for refrigerant, thus can realize pressure balance sooner, more reposefully.
[accompanying drawing explanation]
Fig. 1 is the structural representation of electric expansion valve of the present invention.
Fig. 2 is the partial enlarged drawing that Fig. 1 circle shows part.
Fig. 3 is the structural representation of valve core case of the present invention.
[detailed description of the invention]
In order to make those skilled in the art better understand technical scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1 to Figure 3, electric expansion valve provided by the invention comprises valve component, nut assembly, needle screw component and rotor assembly.
Wherein, valve component comprises valve core case 11, valve seat 12, first tube connector 13, second tube connector 14 of tubular, valve core case 11, valve seat 12, first tube connector 13, second tube connector 14 are connected to form valve component, valve core case 11, valve seat 12, first tube connector 13, second tube connector 14 can be integral by being welded to connect, also can be one-body molded.Described valve component also comprises the valve port seat 15 being mounted on valve seat, described valve port seat 15 has valve port and is positioned at the opening at valve port two ends, described valve core case 11 and the first tube connector 13 are fixedly attached to two openings of described valve port seat 15 by welding or interference fit, and valve port seat 15 upper end is connected with valve core case 11.Described valve core case 11 is circumferentially being provided with some side opening 11c, can become the passage of connection first tube connector 13 and the second tube connector 14 when needle 21 is opened.
Described nut assembly comprises the nut for installing needle screw component, described nut comprises endless metal brace 31 and plastic nut 32, described endless metal brace 31 is formed by metallic plate punching, and plastic nut 32 adopts engineering plastics injection mo(u)lding on the basis of described endless metal brace 31.The main body of nut is engineering plastics injection mo(u)lding, and while guarantee nut and valve seat 12 bonding strength, the technique of nut is simple, production efficiency is higher, cost is lower.Outside and the valve seat 12 of described endless metal brace 31 are welded and fixed, and nut is fixedly connected with valve seat 12 by endless metal brace 31, and endless metal brace 31 can be formed with valve seat 12 and firmly be connected, and can ensure the bonding strength of nut and valve seat 12.
The excircle on the top of described nut is set with spring guide rail 33 and stop slip ring 34, described endless metal brace 31 offers spring guide rail fixing hole (not shown), the lower end of described nut is set with the upper end of valve core case 11 and coordinates, the common groove A formed for refrigerant circulation.The lower end of described nut has nut inner tube wall, and the upper end of described valve core case has valve core case outer tube wall, and described groove A is formed between nut inner tube wall and valve core case outer tube wall.The main body of groove A is opened in valve core case outer tube wall, (namely the main body of groove forms the part of groove primary structure jointly to form closed slot cross-section with the nut inner tube wall coordinated, such as, valve core case outer tube wall in the present embodiment needs the structural design of groove, and nut inner tube wall coordinates without the need to processing valve core case outer tube wall especially; If nut inner tube wall has made relevant structural design for groove equally, then can also be referred to as the main body of groove).The upper end of described valve core case 11 is provided with valve core case end face 11a, described groove body is through described valve core case end face 11a upwards, described nut is provided with the nut step surface 32a relative with valve core case end face 11a, described valve core case end face 11a and nut step surface 32a is parallel and interval is not more than 2mm(that is formation gap is not more than 2mm), form the upper end refrigerant passage of groove; The lower end of described nut is provided with nut end face 32b, and after described nut 32 and valve core case 11 are set with and coordinate, groove body does not all submerge nut inner core, but part exposes nut end face 32b, forms the lower end refrigerant passage of groove.Described nut lower end and valve core case upper end are interference, transition or matched in clearance, thus can participate in installation guiding and the axiality adjustment of valve core case; And the damping slot A be arranged between described nut inner tube wall and valve core case outer tube wall, then provide damping path.
Described valve core case 11 be circumferentially evenly equipped with three groove A, when electric expansion valve internal pressure is unbalance, the uniform damping path of described circumference can realize pressure balance more reposefully.The described side opening 11c being arranged at valve core case 11 bottom is better is evenly equipped with three, and three the groove As uniform with valve core case 11 top stagger and arrange, and stagger 60 ° more specifically, work more reposefully to realize expansion valve.The endless metal brace 31 that it should be noted that the present embodiment does not arrange damp channel, even guide rail fixing hole also loses the function of damp channel substantially because holding spring guide rail 33.Described plastic nut 32 is arranged the damping hole 32c connecting rotor chamber, the damping hole 32c equivalent latus rectum described plastic nut 32 connecting rotor chamber is not more than the equivalent latus rectum of described groove A, to realize first balancing inner chamber, then the function in balancing rotor chamber.Certainly, endless metal brace 31 also can arrange damp channel, but does not form the negative to this patent.
Described needle screw component can comprise needle 21, valve needle cover 22, screw mandrel 23, back-up ring 24, spring 25, needle 21 and valve needle cover 22 link into an integrated entity, specifically can be linked into an integrated entity by modes such as welding, interference are press-fitted, the head of screw mandrel 23 is set with back-up ring 24, back-up ring 24 can be set with by the modes such as welding, interference are press-fitted and screw mandrel 23, screw mandrel 23 is installed in the endoporus of needle 21, is also provided with spring 25 in needle 21 endoporus, and the end of screw mandrel 23 can against spring 25.
Described rotor assembly comprises the rotor 41 being fixed on screw mandrel 23 upper end.In addition, electric expansion valve also comprises the shell 5 be sleeved on valve seat 12, for sealed valve body, space coated for shell 5 is separated into the collecting rotor chamber of rotor assembly and the inner chamber as refrigerant control channel by described nut (comprising endless metal brace 31 and plastic nut 32).Needle screw component in the present embodiment; rotor assembly and housing 5 have nothing to do with inventive point of the present invention; the present invention is not to needle screw component; the structure of rotor assembly and housing 5 is specifically limited; needle screw component; rotor assembly and housing 5 adopt other any structure, all should in protection scope of the present invention.
Electric expansion valve provided by the present invention is not limited thereto, in above-described embodiment, described groove body is opened on valve core case outer tube wall, in some other embodiment, described groove body also can be opened on nut seat inner tube wall, can follow plastic nut integrated injection molding, convenient and swift, even on valve core case outer tube wall and nut seat inner tube wall equal setting unit groove body also can, three now uniform grooves also can correspondingly be distributed on nut seat inner tube wall or/and valve core case outer tube wall; In addition, described three uniform grooves yet just preferably scheme, does not get rid of the design of more multiple-grooved and not uniform groove; Moreover the valve port seat in the present embodiment and valve core case separate machined are also assembled into one, and in some other embodiment, described valve port seat and valve core case also can be integrally manufactured shaping.
The above is only the description of the preferred embodiment of invention; should be understood that; due to the finiteness of literal expression; and objectively there is unlimited concrete structure; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. an electric expansion valve, comprise valve component, nut assembly, needle screw component, described valve component comprises valve seat, valve core case, described nut assembly comprises the nut for installing described needle screw component, it is characterized in that, the lower end of described nut is set with the upper end of valve core case and coordinates, the common groove formed for refrigerant circulation.
2. electric expansion valve according to claim 1, is characterized in that, the lower end of described nut has nut inner tube wall, and the upper end of described valve core case has valve core case outer tube wall, and described groove is formed between nut inner tube wall and valve core case outer tube wall.
3. electric expansion valve according to claim 2, is characterized in that, described groove body is opened in valve core case outer tube wall.
4. electric expansion valve according to claim 2, is characterized in that, described groove body is opened in nut inner tube wall.
5. electric expansion valve according to claim 2, is characterized in that, described groove has three, be distributed on valve core case outer tube wall or/and nut inner tube wall circumferentially.
6. the electric expansion valve according to any one of claim 1-5, is characterized in that, described brace does not arrange the damp channel of communication with cavity and rotor chamber, and described plastic nut is provided with the damping hole of communication with cavity and rotor chamber.
7. electric expansion valve according to claim 6, is characterized in that, the damping hole equivalent latus rectum described nut connecting rotor chamber is not more than the equivalent latus rectum of described groove.
8. the electric expansion valve according to any one of claim 1-5, is characterized in that, described electric expansion valve also comprises the valve port seat being located at valve seat, and described valve core case is fixedly connected with by welding or interference fit with valve port seat.
9. the electric expansion valve according to any one of claim 1-5, is characterized in that, described valve core case be circumferentially provided with some side openings being communicated with the first tube connector and the second tube connector.
10. the electric expansion valve according to any one of claim 1-5, is characterized in that, the lower end of described nut is provided with nut end face, and after described nut and valve core case are set with and coordinate, described groove body part exposes nut end face.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410077071.1A CN104896810A (en) | 2014-03-05 | 2014-03-05 | Electronic expansion valve |
| JP2014003526U JP3195271U6 (en) | 2014-07-03 | Adjustable expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410077071.1A CN104896810A (en) | 2014-03-05 | 2014-03-05 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104896810A true CN104896810A (en) | 2015-09-09 |
Family
ID=52684992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410077071.1A Pending CN104896810A (en) | 2014-03-05 | 2014-03-05 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104896810A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435753A (en) * | 2016-05-25 | 2017-12-05 | 浙江三花智能控制股份有限公司 | Electric expansion valve and there is its refrigeration plant |
| CN107883003A (en) * | 2017-12-14 | 2018-04-06 | 浙江中宝自控元件有限公司 | A kind of motor-driven valve for being used to adjust fluid flow |
| WO2019080691A1 (en) * | 2017-10-27 | 2019-05-02 | 浙江三花制冷集团有限公司 | Electrically operated valve |
| CN112901794A (en) * | 2019-12-04 | 2021-06-04 | 伊希欧1控股有限公司 | Expansion valve |
| WO2024021870A1 (en) * | 2022-07-27 | 2024-02-01 | 广东威灵电机制造有限公司 | Electronic expansion valve assembly, electronic expansion valve and refrigeration apparatus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135386A (en) * | 2006-08-31 | 2008-03-05 | 浙江三花制冷集团有限公司 | Electric valve |
| CN101294634A (en) * | 2007-03-20 | 2008-10-29 | 株式会社不二工机 | Electric valve |
| CN102032381A (en) * | 2009-09-27 | 2011-04-27 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN102261774A (en) * | 2010-05-28 | 2011-11-30 | 浙江三花股份有限公司 | Electric valve |
| CN102454818A (en) * | 2010-10-15 | 2012-05-16 | 浙江三花股份有限公司 | Electric valve |
| US8556229B2 (en) * | 2009-07-17 | 2013-10-15 | Zhejiang Sanhua Co., Ltd. | Electronic expansion valve |
-
2014
- 2014-03-05 CN CN201410077071.1A patent/CN104896810A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135386A (en) * | 2006-08-31 | 2008-03-05 | 浙江三花制冷集团有限公司 | Electric valve |
| CN101294634A (en) * | 2007-03-20 | 2008-10-29 | 株式会社不二工机 | Electric valve |
| US8556229B2 (en) * | 2009-07-17 | 2013-10-15 | Zhejiang Sanhua Co., Ltd. | Electronic expansion valve |
| CN102032381A (en) * | 2009-09-27 | 2011-04-27 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN102261774A (en) * | 2010-05-28 | 2011-11-30 | 浙江三花股份有限公司 | Electric valve |
| CN102454818A (en) * | 2010-10-15 | 2012-05-16 | 浙江三花股份有限公司 | Electric valve |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435753A (en) * | 2016-05-25 | 2017-12-05 | 浙江三花智能控制股份有限公司 | Electric expansion valve and there is its refrigeration plant |
| WO2019080691A1 (en) * | 2017-10-27 | 2019-05-02 | 浙江三花制冷集团有限公司 | Electrically operated valve |
| US11365822B2 (en) | 2017-10-27 | 2022-06-21 | Zhejiang Sanhua Climate and Appliance Controls Group Co., Ltd. | Direct action type electrically operated valve |
| CN107883003A (en) * | 2017-12-14 | 2018-04-06 | 浙江中宝自控元件有限公司 | A kind of motor-driven valve for being used to adjust fluid flow |
| CN107883003B (en) * | 2017-12-14 | 2023-05-09 | 浙江中宝自控元件有限公司 | Electric valve for regulating fluid flow |
| CN112901794A (en) * | 2019-12-04 | 2021-06-04 | 伊希欧1控股有限公司 | Expansion valve |
| CN112901794B (en) * | 2019-12-04 | 2023-01-13 | 伊希欧1控股有限公司 | Expansion valve |
| WO2024021870A1 (en) * | 2022-07-27 | 2024-02-01 | 广东威灵电机制造有限公司 | Electronic expansion valve assembly, electronic expansion valve and refrigeration apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3195271U (en) | 2015-01-15 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150909 |