CN102889719A - Electronic expansion valve and pressure system - Google Patents
Electronic expansion valve and pressure system Download PDFInfo
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- CN102889719A CN102889719A CN2011102072960A CN201110207296A CN102889719A CN 102889719 A CN102889719 A CN 102889719A CN 2011102072960 A CN2011102072960 A CN 2011102072960A CN 201110207296 A CN201110207296 A CN 201110207296A CN 102889719 A CN102889719 A CN 102889719A
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- valve
- electric expansion
- screw mandrel
- expansion valve
- needle device
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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
Abstract
The invention discloses an electronic expansion valve which comprises a valve body, a valve seat of the valve body is provided with an inlet, an outlet and a valve port, the valve port communicates the inlet with the outlet, a valve needle device for changing the through-flow area of the valve port is arranged in the valve seat, a screw rod is arranged in the valve body, the screw rod and the valve needle device are coaxially arranged, and the screw rod controls the valve needle device to move upwards and downwards through a guide component arranged at the end part of the screw rod; and the guide component comprises a connecting part and a guide part, and the connecting part is positioned at the end part of the screw rod in a mechanical connection mode. The screw rod and the guide part in the electronic expansion valve are positioned in a mechanical connection mode, and the fit precision of the screw rod and the guide part is relatively high, so that the positioning coaxiality of the screw rod and the guide part is improved, a situation that the valve needle device vertically moves in the valve seat is facilitated, the accuracy of control on the open degree of the valve port is increased, the prevention of inner leakage is facilitated, and the connection implemented in a mechanical connection mode is relatively reliable. In addition, the invention also provides a pressure system comprising the electronic expansion valve.
Description
Technical field
The present invention relates to valve technology field, particularly relate to a kind of electric expansion valve.The invention still further relates to a kind of pressure system with above-mentioned electric expansion valve.
Background technology
Electric expansion valve mainly applies to the refrigerating of convertible frequency air conditioner system, is connected between evaporimeter and the condenser, regulates the flow of the cold-producing medium that enters evaporimeter by regulating the medium flow area, keeps refrigeration system to be in optimum Working.
The adjusting of electric expansion valve medium flow area mainly utilizes principle of stepping motor, with the forward and reverse rotation of motor-driven magnetic rotor component, and rotatablely moving of magnetic rotor component be converted into moving up and down of screw mandrel, drive connected valve needle device by screw mandrel and rise or descend, to regulate rate-of flow.
Operated by rotary motion guiding parts between screw mandrel and the valve needle device increases the reliability that motion is transmitted.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of a kind of typical electric expansion valve in the prior art; Fig. 2 is electric expansion valve A shown in Figure 1 place enlarged drawing.
As shown in Figure 1, this electric expansion valve mainly comprises valve body, stepper motor 1, gear reduction unit 2, is provided with the screw mandrel 3 of screw thread pair structure and is located at the screw mandrel end for the steel ball 10 of guiding and is used for spacing spacing back-up ring 5; Valve body comprises the valve seat 4 that is provided with medium import and media outlet, and valve seat 4 is provided with the core components such as control needle 8 and liftable bellows 7.
During electric expansion valve work, controlled the rotation of stepper motor 1 rotor of electric expansion valve by the electronic controller of air-conditioning system, driven gear decelerator 2, transmission by screw thread pair, screw mandrel 3 moves downward, and the steel ball 10 that welds by the screw mandrel top withstands force transferring part lining 6, so that needle 8 moves downward, at this moment, bellows 7 is in continuous extended state.
When applying reverse impulse, screw mandrel 3 moves upward, and needle 8 constantly moves upward under the back stretch of bellows 7 and system pressure effect, thereby changes the opening degree of valve port 9, so that flow area changes, reaches the purpose of the control Flow-rate adjustment degree of superheat.
Screw mandrel 3 and steel ball 10 adopt the spot welding fixed form in the prior art, this connected mode easily makes steel ball 10 and screw mandrel 3 contact-making surface generation welding deformations, and there is multiple uncontrollable factor simultaneously in welding process, therefore the screw mandrel after the welding and the axiality of steel ball relatively are difficult to ensure card, when causing screw mandrel to pass through 8 work of steel ball 10 control needles, needle 8 can not be with respect to medium import vertical motion, and electric expansion valve is interior the leakage easily.
Additionally, the spacing back-up ring 5 in the prior art on the screw mandrel is smaller, and is higher to the processing technology requirement, and cooperates installation more time-consuming, thereby production efficient is lower.
Therefore, how to provide a kind of electric expansion valve, the screw mandrel of its valve inner and guiding parts axiality are higher, improve the functional reliability of electric expansion valve, are the present technical issues that need to address of those skilled in the art.
Summary of the invention
One object of the present invention aims to provide a kind of electric expansion valve, and the screw mandrel of its valve inner and guiding parts axiality are higher.Another object of the present invention aims to provide a kind of pressure system with above-mentioned electric expansion valve.
For achieving the above object, the invention provides a kind of electric expansion valve, comprise valve body, the valve port that the valve seat of described valve body is provided with import, outlet and is communicated with described import and described outlet, be provided with the valve needle device of the flow area that changes described valve port in the described valve seat, also be provided with the screw mandrel coaxial with described valve needle device in the described valve body, described screw mandrel is controlled described valve needle device knee-action by the guiding parts that its end arranges; Described guiding parts comprises connecting portion and guide part, and described connecting portion is positioned the end of described screw mandrel by mechanical connection manner.
Preferably, described connecting portion is tubular, the outer peripheral face interference fit of inner circumferential surface and described screw mandrel.
Preferably, described connecting portion is tubular, and inner circumferential surface is provided with internal thread, and the relevant position of described screw mandrel is provided with the external screw thread that matches with described internal thread.
Preferably, when described screw mandrel moves up to maximum displacement, the spacing plane of the upper surface of described connecting portion stop nut in the described valve body.
Preferably, the mating surface of described guiding parts and described valve needle device is protruding sphere.
Preferably, described guiding parts is ceramic guiding parts.
For realizing another purpose, the present invention also provides a kind of pressure system, comprises pressure pipeline and the electric expansion valve that is connected with described pressure pipeline, and described electric expansion valve is above-mentioned each described electric expansion valve.
Preferably, be specially the refrigerant pressure system.
Electric expansion valve provided by the present invention, comprise valve body, the valve port that the valve seat of described valve body is provided with import, outlet and is communicated with described import and described outlet, be provided with the valve needle device of the flow area that changes described valve port in the described valve seat, also be provided with the screw mandrel coaxial with described valve needle device in the described valve body, the guiding parts that described screw mandrel arranges by its end is controlled described valve needle device action; Described guiding parts comprises connecting portion and guide part, and described connecting portion is positioned on the described screw mandrel by mechanical connection manner.
The guide part that promotes the guiding parts of valve needle device motion in the electric expansion valve among the present invention is positioned on the screw mandrel by connecting portion, and connecting portion and screw mandrel orientate mechanical connection manner as, compare with the guide part means of spot welds with screw mandrel in the prior art, mechanical connection manner can not change the material deformation of two parts connecting portions, the quality of fit of screw mandrel and guide part is higher, thereby improve both location axialities, be conducive to valve needle device vertically mobile in valve seat, increase is to the accuracy of valve port opening control, be conducive to prevent interior leakage, and mechanical connection manner connects reliable.
A kind of preferred embodiment in, described connecting portion is tubular, the outer peripheral face interference fit of inner circumferential surface and described screw mandrel.
Screw mandrel and guiding parts interference fit among the present invention, the coaxial precision of the guide part in the guiding parts and screw mandrel can be only outer surface machining accuracy by the end of the inner surface machining accuracy of control connection section and screw mandrel realize, and can realize higher axiality, and guiding parts is relatively simple for structure, saves cost.
Description of drawings
Fig. 1 is the structural representation of a kind of exemplary electronic expansion valve in the prior art;
Fig. 2 is electric expansion valve A shown in Figure 1 place enlarged drawing;
Fig. 3 is the structural representation of a kind of specific embodiment of electric expansion valve provided by the present invention;
Fig. 4 is the structural representation of guiding parts shown in Figure 3;
Fig. 5 is the partial enlarged drawing at electric expansion valve B shown in Figure 3 place.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 1 and Fig. 2:
1 stepper motor; 2 gear reduction units; 3 screw mandrels; 4 valve seats; 5 spacing back-up rings; 6 linings; 7 bellowss; 8 needles; 9 valve ports; 10 steel balls.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 3 to Fig. 5:
11 valve ports; 12 valve needle devices; 13 screw mandrels; 14 valve seats; 15 guiding parts; 151 connecting portions; 152 guide parts; 16 gear reduction units; 18 stepper motors; 19 stop nuts; The F import; The E outlet.
The specific embodiment
A core of the present invention aims to provide a kind of electric expansion valve, and the screw mandrel of its valve inner and guiding parts axiality are higher.Another core of the present invention aims to provide a kind of pressure system that comprises above-mentioned electric expansion valve.
Be without loss of generality, this paper is introduced with the example that is applied as of electric expansion valve in the refrigerant pressure system, it will be understood by those skilled in the art that and does not also get rid of the application of electric expansion valve provided by the present invention in the other field product.
In order to make those skilled in the art person understand better the present invention program, the present invention is described in further detail with the specific embodiment by reference to the accompanying drawings.
Please refer to Fig. 3, Fig. 3 is the structural representation of a kind of specific embodiment of electric expansion valve provided by the present invention.
Can comprise the heat exchange parts such as compressor, condenser and evaporimeter in the refrigerant pressure system, this system is mainly used in heating ventilation air-conditioning system, realizes the adjusting of environment temperature.In frequency-conversion air-conditioning system, in order to improve the efficient of evaporimeter, also be provided with electric expansion valve between evaporimeter and the condenser, electric expansion valve can enter by adjusting the flow of evaporimeter medium, regulate the degree of superheat of evaporimeter, make the refrigerant pressure system be in all the time optimum Working.
In a kind of specific embodiment, the structure of electric expansion valve provided by the present invention as shown in Figure 3, comprise valve body, the valve seat 14 of valve body is provided with import F, outlet E and is communicated with import F and the valve port 11 of outlet E, is provided with the valve needle device 12 of the flow area that changes valve port 11 in the valve seat 14.
Also be provided with the screw mandrel 13 coaxial with valve needle device 12 in the valve body, be provided with the threaded portion on the screw mandrel 13, the stepper motor 18 that is arranged at electric expansion valve inside can drive screw mandrel 13 rotations by driven gear decelerator 16, transmit by the threaded portion, screw mandrel 13 moves up and down, and then screw mandrel 13 is by guiding parts 15 control valve needle devices 12 knee-actions of its end setting.
Guiding parts comprises guide part 152 and the connecting portion 151 that is positioned on the screw mandrel 13, and the connecting portion 151 among the present invention is positioned on the screw mandrel 13 by mechanical connection manner, and mechanical connection can for being threaded, also can be that the interference of extruding form connects.
The guide part that promotes the guiding parts 15 of valve needle device 12 motions in the electric expansion valve among the present invention is arranged on the connecting portion 151, connecting portion 151 is positioned on the screw mandrel 13 by mechanical connection manner, compare with guiding parts 15 means of spot welds with screw mandrel in the prior art 13, mechanical connection manner can not affect the material shape of two parts connecting portions, the quality of fit of screw mandrel 13 and guide part 151 is higher, thereby improve the axiality of both location, be conducive to screw mandrel 13 control valve needle devices 12 in valve seat 14 interior vertical movements, increase is to the accuracy of valve port 11 apertures control, be conducive to prevent leak in the medium, and mechanical connection manner connects reliable.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the structural representation of guiding parts shown in Figure 3; Fig. 5 is the partial enlarged drawing at electric expansion valve B shown in Figure 3 place.
Particularly, connecting portion 151 is tubular, the outer peripheral face interference fit of inner circumferential surface and screw mandrel 13.
Screw mandrel 13 and connecting portion 151 interference fit among the present invention, guide part 152 in the guiding parts 15 and the coaxial precision of screw mandrel 13 can be only outer surface machining accuracy by the end of the tube inner surface machining accuracy of control connection section 151 and screw mandrel 13 realize, and can realize higher axiality, and guiding parts 15 is relatively simple for structure, save cost, and when guiding parts 15 wearing and tearing, easily change guiding parts 15.
In the another kind of specific embodiment, connecting portion section 151 is tubular, and inner circumferential surface is provided with internal thread, and the relevant position of screw mandrel 13 is provided with the external screw thread that matches with internal thread.
Screw mandrel 13 is connected with guiding parts by the engage thread connection, can save installation time, improves efficiency of assembling, is more prone to change, keep in repair guiding parts 15.
In order to control better the range that moves upward of screw mandrel 13, when described screw mandrel 13 moves up to maximum displacement, the upper surface of connecting portion 151 is against the spacing plane of screw mandrel 13 stop nuts 19, and described screw mandrel 13 spacing planes are generally positioned on the inwall of the nut that is nested in screw mandrel 13 outsides.
With back-up ring is installed in the prior art in the cannelure of screw mandrel 13, utilize the spacing mode of back-up ring projection to compare, screw mandrel 13 is directly realized the maximum displacement that screw mandrel 13 is up in the upper surface by connecting portion 151 among the present invention, need not to process cannelure at screw mandrel 13, optimize the structure of screw mandrel 13, and improve the working strength of screw mandrel 13, and need not to install back-up ring, not only reduce the use cost of product, and can save installation time, improve the production efficiency of product.
The guide part 152 of guiding parts 15 can be protruding sphere with the mating surface of valve needle device 12 in the various embodiments described above, and protruding sphere ratio is easier to processing, and guide function is relatively good.
Need to prove, guide part 152 is not limited to sphere with the mating surface of valve needle device 12, can also be other smooth curved surfaces, such as ellipse curved surface etc., correspondingly, the relevant position of the valve needle device 12 that matches with guide part can arrange the coupling curved surface, so that the reliability of transmission.
Electric expansion valve uses for a long time, and the guide part 152 of its guiding parts 15 affects the service life of electric expansion valve than being easier to wearing and tearing.
In a kind of preferred embodiment, guiding parts 15 can be the guiding parts of ceramic material; The ceramic material anti-wear performance is relatively good, can prolong the service life of electric expansion valve.
The structure of guiding parts 15 is not limited to this paper and describes, guiding parts 15 also can be for being provided with the cylinder of protruding sphere, cylindrical side face is processed with the threaded portion, screw mandrel 13 is provided with axial installing hole near the end of valve needle device 12, be provided with the internal thread that matches with described cylindrical threaded portion in the installing hole, guiding parts 15 is located in the installing hole of screw mandrel 13; This guiding parts 15 relatively simple for structure.
Need to prove; the upper and lower noun of locality that waits used herein, for for electric expansion valve in position shown in Fig. 3 to Fig. 5, just in order to express easily; it will be understood by those skilled in the art that the noun of locality used herein should not limit protection scope of the present invention.
Except above-mentioned electric expansion valve, the present invention also provides a kind of pressure system that comprises above-mentioned electric expansion valve, comprise pressure pipeline and the electric expansion valve that is connected with described pressure pipeline, because above-mentioned electric expansion valve has above-mentioned technique effect, the engineering machinery with above-mentioned electric expansion valve also should have corresponding technique effect.
In a kind of concrete embodiment, pressure system is specifically as follows the refrigerant pressure system.
The structure of other each several parts of above-mentioned refrigerant pressure system please refer to prior art, and this paper repeats no more.
Above a kind of electric expansion valve provided by the present invention and pressure system are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (8)
1. electric expansion valve, comprise valve body, the valve seat of described valve body (14) is provided with import (F), export (E) and be communicated with described import (F) and the valve port (11) of described outlet (E), be provided with the valve needle device (12) of the flow area that changes described valve port (11) in the described valve seat (14), also be provided with the screw mandrel (13) coaxial with described valve needle device (12) in the described valve body, described screw mandrel (13) is controlled described valve needle device (12) knee-action by the guiding parts (15) that its end arranges; It is characterized in that, described guiding parts (15) comprises connecting portion (151) and guide part (152), and described connecting portion (151) is positioned the end of described screw mandrel (13) by mechanical connection manner.
2. electric expansion valve according to claim 1 is characterized in that, described connecting portion (151) is tubular, the outer peripheral face interference fit of inner circumferential surface and described screw mandrel (13).
3. electric expansion valve according to claim 1 is characterized in that, described connecting portion (151) is tubular, and inner circumferential surface is provided with internal thread, and the relevant position of described screw mandrel (13) is provided with the external screw thread that matches with described internal thread.
4. electric expansion valve according to claim 3 is characterized in that, when described screw mandrel (13) when moving up to maximum displacement, and the spacing plane of the upper surface of described connecting portion (151) stop nut (19) in the described valve body.
5. according to claim 1 to 4 each described electric expansion valves, it is characterized in that, described guide part (152) is protruding sphere with the mating surface of described valve needle device (12).
6. according to claim 1 to 4 each described electric expansion valves, it is characterized in that, described guiding parts (15) is ceramic guiding parts.
7. a pressure system comprises pressure pipeline and the electric expansion valve that is connected with described pressure pipeline, it is characterized in that, described electric expansion valve is each described electric expansion valve of claim 1 to 6.
8. pressure system according to claim 7 is characterized in that, is specially the refrigerant pressure system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102072960A CN102889719A (en) | 2011-07-22 | 2011-07-22 | Electronic expansion valve and pressure system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102072960A CN102889719A (en) | 2011-07-22 | 2011-07-22 | Electronic expansion valve and pressure system |
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| Publication Number | Publication Date |
|---|---|
| CN102889719A true CN102889719A (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102072960A Pending CN102889719A (en) | 2011-07-22 | 2011-07-22 | Electronic expansion valve and pressure system |
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| CN (1) | CN102889719A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679247A (en) * | 2016-12-12 | 2017-05-17 | 盾安环境技术有限公司 | Electronic expansion valve of vehicle air conditioner system |
| CN108489161A (en) * | 2014-09-01 | 2018-09-04 | 浙江三花汽车零部件有限公司 | Heating power expansion valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006125751A (en) * | 2004-10-29 | 2006-05-18 | Saginomiya Seisakusho Inc | Electric control valve and refrigeration cycle device |
-
2011
- 2011-07-22 CN CN2011102072960A patent/CN102889719A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006125751A (en) * | 2004-10-29 | 2006-05-18 | Saginomiya Seisakusho Inc | Electric control valve and refrigeration cycle device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489161A (en) * | 2014-09-01 | 2018-09-04 | 浙江三花汽车零部件有限公司 | Heating power expansion valve |
| CN106679247A (en) * | 2016-12-12 | 2017-05-17 | 盾安环境技术有限公司 | Electronic expansion valve of vehicle air conditioner system |
| CN106679247B (en) * | 2016-12-12 | 2021-12-07 | 盾安环境技术有限公司 | Electronic expansion valve of air conditioning system for vehicle |
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Application publication date: 20130123 |