CN202520963U - Pilot type electronic expansion valve - Google Patents
Pilot type electronic expansion valve Download PDFInfo
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- CN202520963U CN202520963U CN2012200685518U CN201220068551U CN202520963U CN 202520963 U CN202520963 U CN 202520963U CN 2012200685518 U CN2012200685518 U CN 2012200685518U CN 201220068551 U CN201220068551 U CN 201220068551U CN 202520963 U CN202520963 U CN 202520963U
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- valve
- guide
- expansion valve
- needle
- main valve
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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 utility model relates to a pilot-operated electronic expansion valve (10), it includes: a valve body (12); a pilot valve hole (20) and a main valve hole (22) formed on the valve body; a pilot needle (40) for opening the pilot valve hole; a main valve needle (42) for opening the main valve hole; an actuator for simultaneously driving the pilot valve needle and the main valve needle; wherein the pilot valve needle (40) and the main valve needle (42) are arranged in parallel and spaced apart by a predetermined distance, and the electronic expansion valve is configured to: when the electronic expansion valve is opened, the pilot valve needle (40) firstly opens the pilot valve hole (20), and the main valve needle (42) then opens the main valve hole (22); when the electronic expansion valve is closed, the main valve needle (42) first closes the main valve hole (22), and the pilot valve needle (40) subsequently closes the pilot valve hole (20). According to the utility model discloses an electronic expansion valve structure is simpler, can the fluid flow of accurate control and can adopt little motor to drive.
Description
Technical field
The utility model relates to a kind of type pilot electronics expansion valve.
Background technique
Electric expansion valve is the vitals in the cooling/heating system, is mainly used in the flow of refrigerant fluid is regulated.Traditional electric expansion valve generally comprises driving mechanism (stepper motor), actuator (thread screw mechanism), throttle mechanism (needle valve seat) and relevant assisting agency.
When needle opened and closed valve seat, needle will bear because the power that fluid pressure differential produced of valve seat both sides.Opening area in the valve seat is big more, and the power that needle bears is big more.The fluid pressure differential of valve seat both sides is big more, and the power that needle bears is also big more.Therefore, when electric expansion valve is applied to the bigger system of refrigerating capacity, must adopts in the motor of high pulling torque and open and close valve seat, this has increased the cost of system.
Patent documentation CN101122343A proposes a kind of type pilot control valve and solves the problems referred to above.This control valve comprises pilot valve and main valve.When control valve was worked, motor at first drove pilot valve and opens the first guiding path that forms in the spool of main valve, and the spool of main valve is owing to the pressure of back pressure reduces to open main valve seat then.But the structure of this control valve still is more complicated and the aperture that is difficult to accurately control main valve.
Therefore, need a kind of structure more simply to control the electric expansion valve that is more prone to.
The model utility content
A purpose of one or more mode of executions of the utility model provides the simple more type pilot electronics expansion valve of a kind of structure.
Another purpose of one or more mode of executions of the utility model provides a kind of type pilot electronics expansion valve that can accurately control fluid flow.
Another purpose of one or more mode of executions of the utility model provides a kind of system and while that can be applied to big refrigerating capacity can enough little motor-driven type pilot electronics expansion valves.
One or more to achieve these goals according to aspect of the utility model, provide a kind of type pilot electronics expansion valve, and it comprises: valve body; Be formed on guide's valve opening and main valve hole on the said valve body; Be used to open guide's needle of said guide's valve opening; Be used to open the main valve pin of said main valve hole; Drive the actuator of said guide's needle and said main valve pin simultaneously; Wherein, Said guide's needle and said main valve pin laterally arrange and are spaced a predetermined distance from; And said electric expansion valve is configured to: when opening said electric expansion valve, said guide's needle is at first opened said guide's valve opening, and said main valve pin is opened said main valve hole subsequently; When closing said electric expansion valve, said main valve pin is at first closed said main valve hole, and said guide's needle is closed said guide's valve opening subsequently.
Preferably, when said electric expansion valve is opened fully, between the end of said guide's needle and the said guide's valve opening apart from d1 greater than between the end of said main valve pin and the said main valve hole apart from d2.
Preferably; Said actuator comprises ut socket; Said ut socket comprises second inner chamber that is used to slide and receives first inner chamber of said guide's needle and be used to slide the said main valve pin of reception; First sleeve pipe is fixed in said first inner chamber to limit the axial displacement of said guide's needle, and second sleeve pipe is fixed in said second inner chamber to limit the axial displacement of said main valve pin.
Preferably, in said first inner chamber, be provided with first spring that applies spring force to said guide's needle, in said second inner chamber, be provided with second spring that applies spring force to said main valve pin.
Preferably, the end face of said guide's valve opening is in identical horizontal plane with the end face of said main valve hole, and said guide's needle has identical length with said main valve needle set, and the length of said first sleeve pipe is greater than the length of said second sleeve pipe.
Alternately, the end face of said guide's valve opening is in identical horizontal plane with the end face of said main valve hole, and said first sleeve pipe has identical length with said second sleeve pipe, and the length of said guide's needle is less than the length of said main valve pin.
Alternately, said guide's needle has identical length with said main valve needle set, and said first sleeve pipe has identical length with said second sleeve pipe, and the end face of said guide's valve opening is lower than the end face of said main valve hole.
Preferably, the cross-section area of said guide's valve opening is less than the cross-section area of said main valve hole.
Preferably, said ut socket comprises internal thread segment.
Preferably, said actuator also comprises the main shaft with external thread section, and the external thread section of said main shaft is engaged in the internal thread segment of said ut socket.
Preferably, said type pilot electronics expansion valve further comprises the supporting base that is used to support said ut socket, and but wherein said ut socket can slide in said supporting base can not rotate with respect to said supporting base.
Preferably; The interior perimeter surface of said supporting base is provided with steering channel; The outer surface of said ut socket is provided with the projection that cooperates with said steering channel; Perhaps, the interior perimeter surface of said supporting base is provided with projection, and the outer surface of said ut socket is provided with the steering channel that cooperates with said projection.
Alternately, said supporting base has non-circular interior perimeter surface, and said ut socket has the non-circular outer surface that matees with the non-circular interior perimeter surface of said supporting base.
Alternately, said supporting base has polygonal interior perimeter surface, and said ut socket has the polygonal outer surface that matees with the polygonal interior perimeter surface of said supporting base.
Preferably, said type pilot electronics expansion valve further comprises the bearing unit that supports said main shaft.
Preferably, said bearing unit comprise the lower support element that is fixed on the said supporting base, be fixed on the upper supporting piece on the said lower support element and be fixed on said lower support element and said upper supporting piece between bearing.
Preferably, said type pilot electronics expansion valve further comprise with said main shaft be fixedly connected with rotor rotated and with the sealing cover of said supporting base sealing and fixing.
Preferably; Comprise axially extended balance channel and the equalizing orifice that radially extends in the said main shaft; Said first inner chamber and said second inner chamber are communicated with said internal thread segment fluid, and said internal thread segment is communicated with the space fluid that said sealing cover impales via the balance channel and the equalizing orifice of said main shaft.
Preferably, be formed with balance channel on the said valve body, be formed with balance channel on the said supporting base, the inner space of said valve body is communicated with the space fluid that said sealing cover impales via the balance channel of said valve body and the balance channel of said supporting base.
Preferably, the stator that drives said rotor rotation is arranged on the outside of said sealing cover.
Advantage according to the electric expansion valve of one or more mode of executions of the utility model is:
In type pilot electronics expansion valve according to a kind of mode of execution of the utility model; The guide's valve opening and the main valve hole that are formed with on the valve body; Guide's needle that is arranged in parallel and main valve pin are performed mechanism simultaneously and drive and open guide's valve opening and main valve hole; Particularly in opening the process of electric expansion valve, guide's needle is at first opened guide's valve opening, and the main valve stylus printer is opened main valve hole subsequently.Utilize this structure, can simplify the internal structure of electric expansion valve.Particularly because the main valve pin also is performed mechanism drives, so can utilize stepper motor for example easily accurately to control the aperture of electric expansion valve.In addition, thus since guide's needle at first open the pressure difference that guide's valve opening has reduced the main valve hole both sides, so can utilize littler motor to open main valve hole.
In type pilot electronics expansion valve according to a kind of mode of execution of the utility model, between the end of guide's needle and the guide's valve opening apart from d1 can set for greater than between the end of main valve pin and the main valve hole apart from d2.Therefore, each needle and the valve opening that can easily construct and design electric expansion valve are to realize the purpose of the utility model.
In type pilot electronics expansion valve according to a kind of mode of execution of the utility model; Actuator can comprise the supporting base of ut socket and sliding guidance ut socket, thereby and guide's needle and main valve pin all be arranged in the ut socket and can move with ut socket.Therefore, can rotatablely moving of rotor and main shaft be changed into the axial motion of ut socket and guide's needle and main valve pin, thereby can accurately control the aperture of guide's valve opening and main valve hole.In addition; Guide's needle and main valve pin are simultaneously with the ut socket axial motion; Therefore can adopt a cover driving mechanism (motor) drive particularly active drive guide needle and main valve pin the two, this not only provides cost savings but also has improved the stability and the precision of electric expansion valve.
In type pilot electronics expansion valve according to a kind of mode of execution of the utility model; The end face of guide's valve opening can be in identical horizontal plane with the end face of main valve hole; Guide's needle can have identical length with the main valve pin, but the length of first sleeve pipe is greater than the length of second sleeve pipe.In other words, the length that can be only be respectively applied for two sleeve pipes of guide's needle and main valve pin through adjusting promptly can be controlled guide's needle and open earlier and open behind the main valve pin.This has simplified the design and the processing of each parts of electric expansion valve greatly.
Alternately; In type pilot electronics expansion valve according to the another kind of mode of execution of the utility model; The end face of guide's valve opening can be in identical horizontal plane with the end face of main valve hole; First sleeve pipe can have identical length with second sleeve pipe, but the length of guide's needle is less than the length of main valve pin.This can easily realize the purpose of the utility model with other mode.
Alternately; In type pilot electronics expansion valve according to another mode of execution of the utility model; Guide's needle can have identical length with the main valve pin, and first sleeve pipe can have identical length with second sleeve pipe, but the end face of guide's valve opening is lower than the end face of main valve hole.This can realize through other valve seat is set on main valve hole, perhaps its end face is caved in realize through guide's valve opening is further processed, and perhaps realizes through on pilot valve hole and main valve hole, highly different valve seats being set.Equally, adopt above-mentioned structure can easily realize the purpose of the utility model with other mode.
In type pilot electronics expansion valve according to a kind of mode of execution of the utility model; Balance channel or equalizing orifice can be set in each parts to be communicated with the fluid between the inner space of the inner space of realizing valve body and sealing cover; Thereby can promptly realize electric expansion valve pressure inside balance, make that the running of electric expansion valve is more steady.
In the type pilot electronics expansion valve according to a kind of mode of execution of the utility model, rotor is arranged on the inside of electric expansion valve, and stator is arranged on the outside of electric expansion valve.Therefore, the layout of each parts of electric expansion valve is more flexible, and makes the fluid physics ground in electrical assembly and the electric expansion valve completely cut off out, and has strengthened the sealing of electric expansion valve.
Description of drawings
Through following description with reference to accompanying drawing, the feature and advantage of one or several mode of execution of the utility model will become and be more prone to understand, wherein:
Fig. 1 is the sectional view according to the type pilot electronics expansion valve of the utility model mode of execution;
Fig. 2 is the view sub-anatomy of type pilot electronics expansion valve shown in Figure 1;
Fig. 3 is the enlarged view of the part of type pilot electronics expansion valve shown in Figure 1; And
Fig. 4 A, 4B and 4C show the working procedure of type pilot electronics expansion valve.
Embodiment
Following description related to the preferred embodiment only is exemplary, and never is the restriction to the utility model and application or usage.
At first will the essential structure according to the type pilot electronics expansion valve (also abbreviating electric expansion valve hereinafter as) of the utility model mode of execution be described with reference to Fig. 1-3.
Generally, electric expansion valve 10 comprises valve body 12.The upper opening 12-3 that is formed with the inlet 12-1 that is connected with inflow pipe 14, the outlet 12-2 that is connected with outflow tube 16 on the valve body 12 and is used to receive supporting base 30.On the bottom of valve body 12, be formed with guide's valve opening 20 and main valve hole 22.Guide's valve opening 20 all is communicated with to regulate from the flow of the fluid of outlet 12-2 discharge with outlet 12-2 fluid with main valve hole 22.Preferably; The cross-section area of guide's valve opening 20 is less than the cross-section area of main valve hole 22, and the cross-section area of guide's valve opening 20 can wait to confirm according to size and other parameters of the working environment of electric expansion valve, used drive motor with respect to the ratio of the cross-section area of main valve hole 22.
In the mode of execution of the utility model; Because guide's needle 40 is driven by identical actuator with main valve pin 42 simultaneously and guide's needle 40 is opened guide's valve opening 20 earlier; Main valve pin 42 is opened main valve hole 22 subsequently; Therefore can utilize guide's valve opening 20 to shift to an earlier date the pressure difference between balance inlet 12-1 and the outlet 12-2, thereby can utilize less drive motor to realize having the electric expansion valve of larger capacity.
In a kind of mode of execution of the utility model; Shown in Fig. 4 C; Can guide's needle 40, the structure between main valve pin 42, guide's valve opening 20 and the main valve hole 22 is set to: when electric expansion valve 10 is opened fully, between the end of guide's needle 40 and the guide's valve opening 20 apart from d1 greater than between the end of main valve pin 42 and the main valve hole 22 apart from d2.
In the electric expansion valve 10 according to the utility model mode of execution, actuator can comprise ut socket 50.Ut socket 50 comprises second inner chamber 56 that is used to slide and receives first inner chamber 54 of guide's needle 40 and be used to slide reception main valve pin 42.Guide's needle 40 can have identical construction with main valve pin 42, and can have the head 40-1 and the 42-1 of increase in its end respectively.Thereby, can in first inner chamber 54, fixedly install of the axial displacement of first sleeve pipe 44 with restriction guide needle 40, can in second inner chamber 56, fixedly install of the axial displacement of second sleeve pipe 46 with restriction main valve pin 42.Guide's needle 40 can pass first sleeve pipe 44 with opening and closing guide valve opening 20, and the top that the head 40-1 of guide's needle 40 can be connected to first sleeve pipe 44 is to limit its axial displacement.Main valve pin 42 can pass second sleeve pipe 46 with opening and closing main valve hole 22, and the top that the head 42-1 of main valve pin 42 can be connected to second sleeve pipe 42 is to limit its axial displacement.
In addition, first spring 48 that applies spring force to guide's needle 40 can be set in first inner chamber 54, second spring 49 that applies spring force to main valve pin 40 can be set in second inner chamber 56.Like this, first spring 48 can apply towards the power of closing guide's valve opening 20 directions guide's needle 40, and under the state that electric expansion valve 10 is opened, first spring 48 can urge guide's needle 40 makes it be resisted against the top of first sleeve pipe 44.In addition; Under electric expansion valve 10 closing state; Thereby first spring 48 can be regulated the axial displacement of guide's needle 40 by 40 compressions of guide's needle; In addition, first spring 48 can be regulated the power of closing that guide's needle 40 closes guide's valve opening 20 and damages to avoid guide's needle 40 or guide's valve opening 20.Similarly, second spring 49 can apply towards the power of closing main valve hole 22 directions main valve pin 42, and under the state that electric expansion valve 10 is opened, second spring 49 can urge main valve pin 42 makes it be resisted against the top of second sleeve pipe 46.In addition; Under electric expansion valve 10 closing state; Thereby second spring 49 can be regulated the axial displacement of main valve pins 42 by main valve pin 42 compression, and in addition, second spring 49 can be regulated main valve pin 42 and close the power of main valve hole 22 and damage to avoid main valve pin 42 or main valve hole 22.
Actuator according to the utility model mode of execution can also comprise the main shaft 82 with external thread section 82-1.Can be thereby main shaft 82 is fixedly connected with rotor 80 with rotor 80 rotations.The external thread section 82-1 of main shaft 82 can be engaged in the internal thread segment 52 of ut socket 50.In addition, but ut socket 50 can be supported on and make ut socket 50 in supporting base 30, to slide in the supporting base 30 can not rotate with respect to supporting base 30.Supporting base 30 is arranged among the upper opening 12-3 of valve body 12, and has the through hole 32 and 34 that supplies guide's needle 40 and main valve pin 42 to pass.
Particularly; Referring to shown in Figure 3; At least one (being two in this example) steering channel 37-1,37-2 can be set on the interior perimeter surface of supporting base 30, the projection 57-1, the 57-2 that cooperate with steering channel 37-1,37-2 can be set on the outer surface of ut socket 50.Perhaps, can on the interior perimeter surface of supporting base 30, projection be set, and on the outer surface of ut socket 50, the steering channel that cooperates with said projection be set.
Adopt above-mentioned structure; Can the screw pair that rotatablely move through main shaft 82 and ut socket 50 of rotor 80 and main shaft 82 be converted into the axial motion of ut socket 50, thereby can drive guide's needle 40 and 42 axial motions of main valve pin to open or close guide's valve opening 20 and main valve hole 22.
Yet the utility model is not limited thereto, but can adopt other structure rotatablely moving of main shaft 82 to be converted into the axial motion of ut socket 50.For example, supporting base 30 can have non-circular interior perimeter surface, and ut socket 50 can have the non-circular outer surface that matees with the non-circular interior perimeter surface of supporting base 30.Perhaps, supporting base 30 can have polygonal interior perimeter surface, and ut socket 50 can have the polygonal outer surface that matees with the polygonal interior perimeter surface of supporting base 30.
According to the mode of execution of the utility model, the bearing unit of supports main shaft 82 can be set in electric expansion valve 10.For example, bearing unit can comprise the lower support element 60 that is fixed on the supporting base 30, is fixed on the upper supporting piece 72 on the lower support element 60 and is fixed on lower support element 60 and upper supporting piece 72 between bearing 70.Bearing 70 can be a sliding bearing.Bearing unit can provide more stable support for main shaft 82, and the lower support element 60 in the bearing unit can also play the locking function of restriction ut socket 50 axial displacements simultaneously.But; It should be appreciated by those skilled in the art that the utility model is not limited thereto, but can adopt the bearing unit of other structures; Perhaps bearing unit can be fixed with respect to other fixed components of electric expansion valve, perhaps even can omit this bearing unit.
In electric expansion valve 10, can also comprise sealing cover 90 with supporting base 30 sealing and fixing according to the utility model mode of execution.Rotor 80 can be fixed on the inboard of sealing cover 90.
For each regional fluid in the electric expansion valve 10 is communicated with to realize pressure balance fast, in its a plurality of parts, be provided with pressure equalisation passage.For example, can comprise axially extended balance channel 84 and the equalizing orifice 86 that radially extends in the main shaft 82.First inner chamber 54 and second inner chamber 56 can fluid communication with each other and are communicated with internal thread segment 52 fluids.Internal thread segment 52 can be communicated with the space fluid that sealing cover 90 impales with equalizing orifice 86 via the balance channel 84 of main shaft 82.
In addition, can be formed with balance channel 18-1,18-2 in the sidewall of valve body 12, can be formed with in the lug 38 of supporting base 30 and the balance channel 18-1 of valve body 12, balance channel 38-1, the 38-2 that the 18-2 phase fluid is communicated with.Thereby the inner space of valve body 12 is communicated with the space fluid that sealing cover 90 impales via the balance channel 38-1 on balance channel 18-1,18-2 and the supporting base 30 of valve body 12,38-2.
Further, also can form pressure compensation opening on first sleeve pipe 44 and second sleeve pipe 46.Also can form pressure compensation opening among the projection 57-1 of ut socket 50, the 57-2.Also can form pressure compensation opening 72-1 on the upper supporting piece 72.
In mode of execution, be used to drive the outside that stator (not shown) that rotor 80 rotates can be arranged on sealing cover 90 according to the utility model.Therefore, the layout of each parts of electric expansion valve is more flexible, and makes the fluid physics ground in electrical assembly and the electric expansion valve completely cut off out, and has strengthened the sealing of electric expansion valve.
Yet the utility model is not limited thereto, and stator also can be arranged in the sealing cover 90.
In the mode of execution shown in Fig. 1-3, the end face of guide's valve opening 20 is arranged to be in identical horizontal plane with the end face of main valve hole 22, and guide's needle 40 has identical length with main valve pin 42, but the length of first sleeve pipe 44 is greater than the length of second sleeve pipe 46.
Thereby shown in Fig. 4 A, 4B and 4C, when the state that is in shown in Fig. 4 A, guide's needle 40 is closed guide's valve opening 20, and main valve pin 42 is closed main valve hole 22.Along with rotor 80 is driven, ut socket 50 moves upward.Because the length of first sleeve pipe 44 is greater than the length of second sleeve pipe 46, moved upward so the head of guide's needle 40 at first drives against the top of first sleeve pipe 44, thereby at first open guide's valve opening 20.And main valve pin 42 is owing to urged downwards and still close main valve hole 22 by second spring 49, till the top of head abuts second sleeve pipe 46 of main valve pin 22, shown in Fig. 4 B.Next; Shown in Fig. 4 C, along with ut socket 50 continues to move upward, thereby the top butt of the head of guide's needle 40 and first sleeve pipe 44 continues to move upward; And the head of main valve pin 42 also begins to move upward owing to the top butt with second sleeve pipe 46, thereby opens main valve hole 22 gradually.After this, can be according to the needs of Flow-rate adjustment, the amounts of rotation of control rotor 80 is with the aperture of control main valve hole 22.
Similarly, when closing electric expansion valve 10, rotor 80 is driven along opposite direction makes ut socket 50 move downward, thereby main valve pin 42 is at first closed main valve hole 22, shown in Fig. 4 B.Along with ut socket 50 continues to move downward, the head of main valve pin 42 compression second springs 49 and main valve pin 42 leaves the top of second sleeve pipe 46.Then, shown in Fig. 4 A, ut socket 50 continues to move downward, and second spring 49 is continued compression and closes guide's valve opening 20 up to guide's needle 40.
Under the state shown in Fig. 4 A, the top of head butt first sleeve pipe 44 of guide's needle 44.But, it will be understood by those skilled in the art that the head of guide's needle 44 can leave the top of first sleeve pipe 44 and further compress first spring 48 so that the suitable power of closing to be provided.
Except above-mentioned mode of execution, can also do following remodeling to the electric expansion valve 10 of the utility model.
For example, identical horizontal plane is arranged to be in the end face road of the end face of guide's valve opening 20 and main valve hole 22, and first sleeve pipe 44 can have identical length with second sleeve pipe 46, but the length of guide's needle 40 can be less than the length of main valve pin 42.This can realize the beneficial effect of aforesaid the utility model equally.
In addition, guide's needle 40 can be arranged to have identical length with main valve pin 42, and first sleeve pipe 44 can be arranged to have identical length with second sleeve pipe 46, but the end face of guide's valve opening 20 can be lower than the end face of main valve hole 22.For example, can make it recessed with respect to main valve hole through guide's valve opening is further processed, the valve seat that different heights perhaps can be set on pilot valve hole or main valve hole makes the end face of guide's valve opening be lower than the end face of main valve hole.This can realize the beneficial effect of aforesaid the utility model equally.
Although described the various mode of executions of the 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, under the situation of essence that does not depart from the utility model and scope, can realize other modification and variant by those skilled in the art.All these modification and variant all fall in the scope of the utility model.And all members described here can be replaced by the member that is equal on the other technologies property.
Claims (20)
1. a type pilot electronics expansion valve (10) is characterized in that comprising:
Valve body (12);
Be formed on guide's valve opening (20) and main valve hole (22) on the said valve body (12);
Be used to open guide's needle (40) of said guide's valve opening (20);
Be used to open the main valve pin (42) of said main valve hole (22);
Drive the actuator of said guide's needle (40) and said main valve pin (42) simultaneously;
Wherein, said guide's needle (40) and said main valve pin (42) laterally arrange and are spaced a predetermined distance from, and
Said electric expansion valve is configured to: when opening said electric expansion valve, said guide's needle (40) is at first opened said guide's valve opening (20), and said main valve pin (42) is opened said main valve hole (22) subsequently; When closing said electric expansion valve, said main valve pin (42) is at first closed said main valve hole (22), and said guide's needle (40) is closed said guide's valve opening (20) subsequently.
2. type pilot electronics expansion valve as claimed in claim 1 (10); Wherein when said electric expansion valve is opened fully, between the end of said guide's needle (40) and the said guide's valve opening (20) apart from d1 greater than between the end of said main valve pin (42) and the said main valve hole (22) apart from d2.
3. type pilot electronics expansion valve as claimed in claim 1 (10); Wherein said actuator comprises ut socket (50); Said ut socket (50) comprises second inner chamber (56) that is used for sliding and receives first inner chamber (54) of said guide's needle (40) and be used for sliding the said main valve pin of reception (42); First sleeve pipe (44) is fixed in said first inner chamber (54) to limit the axial displacement of said guide's needle (40), and second sleeve pipe (46) is fixed in said second inner chamber (56) to limit the axial displacement of said main valve pin (42).
4. type pilot electronics expansion valve as claimed in claim 3 (10); Wherein in said first inner chamber (54), be provided with first spring (48) that applies spring force to said guide's needle (40), in said second inner chamber (56), be provided with second spring (49) that applies spring force to said main valve pin (40).
5. type pilot electronics expansion valve as claimed in claim 4 (10); The end face of wherein said guide's valve opening (20) is in identical horizontal plane with the end face of said main valve hole (22); Said guide's needle (40) has identical length with said main valve pin (42), and the length of said first sleeve pipe (44) is greater than the length of said second sleeve pipe (46).
6. type pilot electronics expansion valve as claimed in claim 4 (10); The end face of wherein said guide's valve opening (20) is in identical horizontal plane with the end face of said main valve hole (22); Said first sleeve pipe (44) has identical length with said second sleeve pipe (46), and the length of said guide's needle (40) is less than the length of said main valve pin (42).
7. type pilot electronics expansion valve as claimed in claim 4 (10); Wherein said guide's needle (40) has identical length with said main valve pin (42); Said first sleeve pipe (44) has identical length with said second sleeve pipe (46), and the end face of said guide's valve opening (20) is lower than the end face of said main valve hole (22).
8. type pilot electronics expansion valve as claimed in claim 1 (10), the cross-section area of wherein said guide's valve opening (20) is less than the cross-section area of said main valve hole (22).
9. like each described type pilot electronics expansion valve (10) among the claim 3-8, wherein said ut socket (50) comprises internal thread segment (52).
10. type pilot electronics expansion valve as claimed in claim 9 (10); Wherein said actuator also comprises the main shaft (82) with external thread section (82-1), and the external thread section (82-1) of said main shaft (82) is engaged in the internal thread segment (52) of said ut socket (50).
11. type pilot electronics expansion valve as claimed in claim 10 (10); Further comprise the supporting base (30) that is used to support said ut socket (50), wherein said ut socket (50) can slide in said supporting base (30) but can not rotate with respect to said supporting base (30).
12. type pilot electronics expansion valve as claimed in claim 11 (10), the interior perimeter surface of wherein said supporting base (30) be provided with steering channel (37-1,37-2); The outer surface of said ut socket (50) is provided with and said steering channel (37-1; The projection that 37-2) cooperates (57-1,57-2), perhaps; The interior perimeter surface of said supporting base (30) is provided with projection, and the outer surface of said ut socket (50) is provided with the steering channel that cooperates with said projection.
13. type pilot electronics expansion valve as claimed in claim 11 (10), wherein said supporting base (30) have non-circular interior perimeter surface, said ut socket (50) has the non-circular outer surface that matees with the non-circular interior perimeter surface of said supporting base (30).
14. type pilot electronics expansion valve as claimed in claim 11 (10), wherein said supporting base (30) have polygonal interior perimeter surface, said ut socket (50) has the polygonal outer surface that matees with the polygonal interior perimeter surface of said supporting base (30).
15. type pilot electronics expansion valve as claimed in claim 11 (10) further comprises the bearing unit that supports said main shaft (82).
16. type pilot electronics expansion valve as claimed in claim 15 (10), wherein said bearing unit comprise the lower support element (60) that is fixed on the said supporting base (30), are fixed on the upper supporting piece (72) on the said lower support element (60) and are fixed on said lower support element (60) and said upper supporting piece (72) between bearing (70).
17. type pilot electronics expansion valve as claimed in claim 11 (10), further comprise with said main shaft (82) be fixedly connected with rotor rotated (80) and with the sealing cover (90) of said supporting base (30) sealing and fixing.
18. type pilot electronics expansion valve as claimed in claim 17 (10); Comprise axially extended balance channel (84) and the equalizing orifice (86) that radially extends in the wherein said main shaft (82); Said first inner chamber (54) and said second inner chamber (56) are communicated with said internal thread segment (52) fluid, and said internal thread segment (52) is communicated with the space fluid that said sealing cover (90) impales via the balance channel (84) and the equalizing orifice (86) of said main shaft (82).
19. type pilot electronics expansion valve as claimed in claim 17 (10); Be formed with on the wherein said valve body (12) balance channel (18-1,18-2), said supporting base is formed with balance channel (38-1 on (30); 38-2); (18-1,18-2) (38-1 38-2) is communicated with the space fluid that said sealing cover (90) impales with the balance channel of said supporting base (30) via the balance channel of said valve body (12) in the inner space of said valve body (12).
20. type pilot electronics expansion valve as claimed in claim 17 (10), the stator that wherein drives said rotor (80) rotation is arranged on the outside of said sealing cover (90).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200685518U CN202520963U (en) | 2012-02-28 | 2012-02-28 | Pilot type electronic expansion valve |
| PCT/CN2013/070162 WO2013127275A1 (en) | 2012-02-28 | 2013-01-07 | Pilot electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200685518U CN202520963U (en) | 2012-02-28 | 2012-02-28 | Pilot type electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202520963U true CN202520963U (en) | 2012-11-07 |
Family
ID=47103915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200685518U Expired - Lifetime CN202520963U (en) | 2012-02-28 | 2012-02-28 | Pilot type electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202520963U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127275A1 (en) * | 2012-02-28 | 2013-09-06 | 艾默生环境优化技术(苏州)有限公司 | Pilot electronic expansion valve |
| CN103291937A (en) * | 2012-02-28 | 2013-09-11 | 艾默生环境优化技术(苏州)有限公司 | Pilot type electronic expansion valve |
| US20170176068A1 (en) | 2015-12-21 | 2017-06-22 | Trane International Inc. | Electronic expansion device |
| CN107435754A (en) * | 2016-05-26 | 2017-12-05 | 株式会社不二工机 | Flow control valve |
| WO2019091484A1 (en) * | 2017-11-13 | 2019-05-16 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
-
2012
- 2012-02-28 CN CN2012200685518U patent/CN202520963U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127275A1 (en) * | 2012-02-28 | 2013-09-06 | 艾默生环境优化技术(苏州)有限公司 | Pilot electronic expansion valve |
| CN103291937A (en) * | 2012-02-28 | 2013-09-11 | 艾默生环境优化技术(苏州)有限公司 | Pilot type electronic expansion valve |
| US20170176068A1 (en) | 2015-12-21 | 2017-06-22 | Trane International Inc. | Electronic expansion device |
| EP3184939A1 (en) * | 2015-12-21 | 2017-06-28 | Trane International Inc. | Electronic expansion device |
| US10697676B2 (en) | 2015-12-21 | 2020-06-30 | Trane International Inc. | Electronic expansion device |
| CN107435754A (en) * | 2016-05-26 | 2017-12-05 | 株式会社不二工机 | Flow control valve |
| WO2019091484A1 (en) * | 2017-11-13 | 2019-05-16 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
| US11555637B2 (en) | 2017-11-13 | 2023-01-17 | Emerson Climate Technologies (Suzhou) Co., Ltd. | Electronic expansion valve |
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