CN105508623B - Electric expansion valve - Google Patents
Electric expansion valve Download PDFInfo
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- CN105508623B CN105508623B CN201410500188.6A CN201410500188A CN105508623B CN 105508623 B CN105508623 B CN 105508623B CN 201410500188 A CN201410500188 A CN 201410500188A CN 105508623 B CN105508623 B CN 105508623B
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- electric expansion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The present invention provides a kind of electric expansion valves.The electric expansion valve includes: the first valve seat；Second valve seat, first end are provided with primary valve, the first circulation passage are provided on side wall；Valve seat core includes spool bore；Horizontal adapter tube；Vertical joint pipe；Needle is correspondingly arranged with the spool bore of valve seat core；Nut；Screw rod, the moving direction along needle are reciprocally screwed onto nut, and valve needle is moved along the glide direction of valve seat core；The second end of second valve seat combines to form position limiting structure with the first end of nut, limits sliding position of the valve seat core in the second valve seat；Further include: the second circulation passage, setting are connected on nut, and by the inner cavity of the second valve seat with the inner cavity of the first valve seat；And/or third circulation passage, third circulation passage are arranged on the second valve seat wall between position limiting structure and the first circulation passage.Electric expansion valve according to the present invention, the problem of impacting needle when can avoid refrigerant reverse flow and cause screw deadlocking.
Description
Technical field
The present invention relates to electric expansion valve, the electric expansion valve being particularly applied in the refrigeration systems such as air conditioner, refrigerator.
Background technique
In air-conditioning market, farther out due to its indoor unit and outdoor unit distance, two electric expansion valves can be generally used,
And the two electric expansion valves must imitate in check valve in parallel, the work that could so improve air-conditioning system to the maximum extent respectively
Rate.
During electric expansion valve work, when refrigerant forward flow, it can be first turned on needle, then pass through valve
From the primary valve outflow on small valve seat after channel on seat core.When refrigerant reverse flow, it may appear that refrigerant instantaneously rushes
Valve seat core is hit, slides valve seat core in small valve seat, and then impacts needle, causes needle to the cooperation between screw rod and nut
The problem of impacting, may cause screw deadlocking.
Summary of the invention
The object of the present invention is to provide a kind of electric expansion valves, impact needle when can avoid refrigerant reverse flow and cause
The problem of screw deadlocking.
In order to solve the above technical problems, providing a kind of electric expansion valve as one aspect of the present invention, comprising: the
One valve seat；Second valve seat, is fixedly connected on the first end end of the first valve seat, and the first end end of the second valve seat is provided with main valve
Mouthful, the first circulation passage of the side wall through the second valve seat is provided on the side wall of the second valve seat；Valve seat core, is mounted slidably
It include the spool bore for being connected to primary valve to turn on or off primary valve in the second valve seat；Horizontal adapter tube, is connected to first
The inner cavity of valve seat；Vertical joint pipe is fixedly connected on the outlet port of primary valve；Needle is correspondingly set with the spool bore of valve seat core
It sets；Nut is arranged in the first valve seat；Screw rod, the moving direction along needle are reciprocally screwed onto nut, valve needle
It moves along the glide direction of valve seat core to turn on or off spool bore；First circulation passage will when valve seat core opens primary valve
Primary valve is connected with the inner cavity of the first valve seat；The second end of second valve seat combines to form position limiting structure with the first end of nut,
Limit sliding position of the valve seat core in the second valve seat；Electric expansion valve further include: the second circulation passage is arranged on nut,
And the inner cavity of the second valve seat is connected with the inner cavity of the first valve seat；And/or third circulation passage, the setting of third circulation passage
On the second valve seat wall between position limiting structure and the first circulation passage, third circulation passage is when valve seat core closes primary valve
The inner cavity of second valve seat is connected with the inner cavity of the first valve seat.
Further, the first end of nut is socketed on the second end of the second valve seat.
Further, the second valve seat includes pedestal and the second sleeve that is fixedly connected with pedestal, and pedestal is fixed at
On one valve seat, valve seat core is slidably disposed in second sleeve.
Further, nut is socketed on second sleeve, and the second circulation passage is radially arranged in the close of nut along nut
The first end of second valve seat.
Further, the first end end of nut is provided with end bosses, the first end end face of end bosses and nut it
Between form catching step, on catching step, end bosses are set in second sleeve the second end end abutment of second sleeve,
Position limiting structure is end bosses.
Further, nut is set in second sleeve, and the first end end in the insertion second sleeve of nut is limit
The position limiting structure of valve seat core.
Further, nut has stepped hole, and second sleeve is set in the large diameter hole of nut, the diameter holes of nut it is interior
Diameter is less than the internal diameter of second sleeve, and the step of stepped hole is the position limiting structure for limiting valve seat core.
Further, nut has stepped hole, and second sleeve is set in the large diameter hole of nut, and position limiting structure is to be fastened on
Baffle ring between the first end end of second sleeve and the step of stepped hole.
Further, when electric expansion valve is reversely operated, when valve seat core opens primary valve, needle opens spool bore.
Further, the first end of nut is also socketed with first sleeve, and first sleeve extends to valve seat core, and needle is slidably
Ground is arranged in first sleeve；The second end of second valve seat combines to form position limiting structure with the first end of first sleeve, with limitation
Sliding position of the valve seat core in the second valve seat.
The present invention combines to form position limiting structure between the second end end of the second valve seat and the first end of nut, can be right
The axial movement of valve seat core forms limit, thus when refrigerant reverse flow, valve seat core can be limited by position limiting structure
The distance being axially moved in the impact by refrigerant will not make needle so that valve seat core only moves preset distance
The impact of Cheng Tai great is protected to be formed to entire electric expansion valve, effectively prevent refrigerant reverse flow and lead to valve seat core
The problem of impacting needle, and then causing screw deadlocking.
Detailed description of the invention
Fig. 1 diagrammatically illustrates the sectional structure chart of the electric expansion valve of first embodiment according to the present invention；
Fig. 2 diagrammatically illustrates the sectional structure chart of the electric expansion valve of second embodiment according to the present invention；
Fig. 3 diagrammatically illustrates the sectional structure chart of the electric expansion valve of third embodiment according to the present invention；
Fig. 4 diagrammatically illustrates the sectional structure chart of the electric expansion valve of fourth embodiment according to the present invention；
Fig. 5 diagrammatically illustrates the sectional structure chart of the electric expansion valve of fifth embodiment according to the present invention；
Fig. 6 diagrammatically illustrates the section view knot of split type second valve seat of the electric expansion valve of embodiment according to the present invention
Composition.
Appended drawing reference in figure: 10, the first valve seat；20, the second valve seat；30, valve seat core；40, horizontal adapter tube；50, vertical joint pipe；
60, needle；70, nut；80, screw rod；21, primary valve；22, the first circulation passage；23, position limiting structure；24, pedestal；25, second
Sleeve；31, spool bore；71, the second circulation passage；72, first sleeve；73, large diameter hole；74, diameter holes；75, third circulation is logical
Road；76, end bosses.
Specific embodiment
The embodiment of the present invention is described in detail below, but what the present invention can be defined by the claims and cover
Multitude of different ways is implemented.
Please refer to Fig. 1 to 6, according to an embodiment of the invention, electric expansion valve include the first valve seat 10, the second valve seat 20,
Valve seat core 30, horizontal adapter tube 40, vertical joint pipe 50, needle 60, nut 70 and screw rod 80.First valve seat 10 has inner cavity, other component
It is arranged in the first valve seat 10.
Second valve seat 20 is fixedly connected on the first end end of the first valve seat 10, the first end end setting of the second valve seat 20
There is primary valve 21, the second end of the second valve seat 20 is provided with sliding channel；It is provided on the side wall of second valve seat 20 through second
First circulation passage 22 of the side wall of valve seat 20, first circulation passage 22 is by the inner cavity of the second valve seat 20 and the first valve seat 10
Inner cavity is connected.The second end end of second valve seat 20 is provided with opening.
Valve seat core 30 is slidably disposed in the sliding channel of the second valve seat 20 to turn on or off primary valve 21, valve
Seat core 30 includes the spool bore 31 for being connected to primary valve 21, which extends along the glide direction of valve seat core 30, and passes through
Entire valve seat core 30 is worn, the inner cavity of the second valve seat 20 is connected with primary valve 21.Primary valve 21 is closed when valve seat core 30 is located at
Position when, the first circulation passage 22 be blocked, the channel between primary valve 21 and the inner cavity of the first valve seat 10 is disconnected, first
The inner cavity of valve seat 10 is merely able to be connected to by realizing between spool bore 31 and primary valve 21；Primary valve is opened when valve seat core 30 is located at
When 21 position, primary valve 21 is connected by the first circulation passage 22 with the inner cavity of the first valve seat 10.
Horizontal adapter tube 40 is connected to the inner cavity of the first valve seat 10；Vertical joint pipe 50 is fixedly connected on the outlet port of primary valve 21,
And the inner cavity of the second valve seat 20 is connected to by primary valve 21.
Needle 60 is correspondingly arranged with the spool bore 31 of valve seat core 30；Nut 70 is arranged in the first valve seat 10；Screw rod
80 are reciprocally screwed onto nut 70 along the moving direction of needle 60, and valve needle 60 is moved along the glide direction of valve seat core 30
It moves to turn on or off spool bore 31.By adjusting the gap between needle 60 and spool bore 31, flow adjusting can be played
Effect.
The second end of second valve seat 20 combines to form position limiting structure 23 with the first end of nut 70, the position limiting structure 23 setting
On the sliding path of valve seat core 30, limited with the axial movement to valve seat core 30.In the present embodiment, the of nut 70
One end is socketed on the second end of the second valve seat 20, and position limiting structure 23 is formed in the binding site of the two.
Electric expansion valve further includes the second circulation passage 71, which is arranged on nut 70, and in valve
The inner cavity of second valve seat 20 is connected by seat core 30 when closing primary valve 21 with the inner cavity of the first valve seat 10.
When refrigerant forward flow, the inner cavity of the first valve seat 10 is entered from horizontal adapter tube 40, valve seat core 30, which is in, at this time closes
The position of primary valve 21 is closed, the first circulation passage 22 is blocked by valve seat core 30, and refrigerant can not be passed through from the inner cavity of the first valve seat 10
Entered in primary valve 21 by the first circulation passage 22, thus horizontal adapter tube 40 can not by the first circulation passage 22 and vertical joint pipe 50 it
Between be connected.But since the inner cavity of the first valve seat 10 can also be connected to by spool bore 31 with primary valve 21, refrigerant is at this time
Primary valve can also be flowed to from spool bore 31 from the inner cavity of the first valve seat 10 after the opening of the second end of the second valve seat 20
21, subsequently into vertical joint pipe 50, the horizontal adapter tube 40 of realization is connected to vertical joint pipe 50, can pass through the position for adjusting needle 60 at this time
Carry out the aperture of regulating valve core bore 31, realizes and the flow of refrigerant is adjusted.
When refrigerant reverse flow, can enter in primary valve 21 from vertical joint pipe 50, at this time in the percussion of refrigerant
Under, valve seat core 30 is axially moved to the direction far from primary valve 21, and the first circulation passage 22 is opened, and refrigerant is through first
Circulation passage 22 enters the inner cavity of the first valve seat 10, then flows out through horizontal adapter tube 40.During valve seat core 30 is axially moved,
It moves to after certain distance, the position where reaching position limiting structure 23 will not continue to due to the barrier effect of position limiting structure 23
Axially movable, therefore greater impact will not be caused to needle 60, also avoided after needle 60 is impacted to 70 He of nut
The fit structure of screw rod 80 causes to impact, and then the problem for causing screw rod 80 stuck.
In refrigerant reverse flow, since the second circulation passage 71 is arranged on nut 70, and by the second valve seat 20
Inner cavity is connected with the inner cavity of the first valve seat 10, when valve seat core 30 opens primary valve 21, can make the interior of the first valve seat 10
Chamber is connected through the second circulation passage 71 with the inner cavity of second valve seat 20 at 30 back side of valve seat core, so that the of 30 back side of valve seat core
The pressure of the inner cavity of two valve seats 20 and the pressure of the inner cavity of the first valve seat 10 are consistent, and it is hereby ensured that release valve seat core 30
Suffered back pressure makes valve seat core 30 be moved to extreme position, is not in the oscillator noise of valve seat core 30.
In addition, the refrigerant pressure of 50 one end of vertical joint pipe is larger in refrigerant reverse flow, flow through it is first-class all
Enter the inner cavity of the first valve seat 10 after road 22, at this time since the second circulation passage 71 is arranged on nut 70, valve seat core
30 will not move to the position where the second circulation passage 71, would not also result in blockage to the second circulation passage 71, thus make
Cryogen can enter the inner cavity of the second valve seat 20 from the second circulation passage of inner cavity 71 of the first valve seat 10, so that 30 liang of valve seat core
The refrigerant pressure at end realizes balance, can further reduce refrigerant to the impact forces of valve seat core 30, and then reduce
Impact forces of the refrigerant to needle 60.
Preferably, when electric expansion valve is reversely operated, when valve seat core 30 opens primary valve 21, needle 60 opens spool bore
31, so, since needle 60 opens spool bore 31, the refrigerant of reverse flow can be from needle 60 and valve seat core 30
Between gap outflow, the refrigerant of reverse flow can be greatly reduced to impact forces caused by needle 60, and in valve
It is formed and is buffered between seat core 30 and needle 60, reduce valve seat core 30 to impact forces caused by needle 60.
In order to preferably reduce the percussion caused by the fit structure of nut 70 and screw rod 80 of needle 60, it is preferable that
It is additionally provided with buffer structure between needle 60 and screw rod 80, which is, for example, spring, in needle 60 by impact
Afterwards, buffering can be formed come the percussion to needle 60 by spring first, therefore can further reduce needle 60 can
It is impacted caused by energy, improves safety and reliability when electric expansion valve uses.
In conjunction with shown in Figure 1, in one embodiment of the invention, the second valve seat 20 includes pedestal 24 and and pedestal
24 second sleeves 25 being fixedly connected, are an integral molding structure, pedestal 24 is fixed between pedestal 24 and second sleeve 25
On first valve seat 10, valve seat core 30 is slidably disposed in second sleeve 25, and the first circulation passage 22 is along second sleeve 25
Extend radially through the side wall of the close first end of second sleeve 25.Nut 70 is socketed on second sleeve 25,71 edge of the second circulation passage
The first end close to the second valve seat 20 for being radially arranged in nut 70 of nut 70.First circulation passage 22 can be circular hole,
Or the through-hole of other shapes.Preferably, multiple first circulation passages 22 are set along the circumferential uniform intervals of second sleeve 25
It sets.
The second end end abutment of second sleeve 25 is arranged in the first end end of nut 70, the first end end of nut 70
There are end bosses 76, forms catching step, the outer diameter of end bosses 76 between end bosses 76 and the first end end face of nut 70
Less than the internal diameter of second sleeve 25, end bosses 76 are protruded into second sleeve 25, radial direction is formed to second sleeve 25
Limit, the end bosses 76 are to be formed by position limiting structure 23 between nut 70 and the second valve seat 20 at this time.Due to the end
The outer diameter of protrusion 76 is less than the internal diameter of second sleeve 25, therefore can be set in second sleeve 25, and is arranged in valve seat core 30
Sliding path on, the position that slides axially of valve seat core 30 is defined, to effectively avoid in 30 motion process of valve seat core
The problem of greater impact is caused to needle 60 and causes screw deadlocking.
In conjunction with shown in Figure 2, in second embodiment of the invention, the specific structure of electric expansion valve and first
Embodiment is essentially identical, the difference is that, in the present embodiment, second between position limiting structure 23 and the first circulation passage 22
Third circulation passage 75 is provided on 20 side wall of valve seat, third circulation passage 75 is when valve seat core 30 closes primary valve 21 by second
The inner cavity of valve seat 20 is connected with the inner cavity of the first valve seat 10.
In refrigerant forward flow, the first circulation passage 22 is closed, third circulation passage 75 and the second circulation passage 71
It opens, the refrigerant in the first valve seat 10 quickly can flow into the second valve through third circulation passage 75 and the second circulation passage 71
In seat 20, then flowed out from primary valve 21, third circulation passage 75 can form auxiliary circulation passage at this time, so that refrigerant
It more quickly can swimmingly be circulated to the inner cavity of the second valve seat 20.In refrigerant reverse flow, 75 quilt of third circulation passage
Valve seat core 30 is closed, and the second circulation passage 71 and the first circulation passage 22 are opened, at this time can be by adjusting the second circulation passage
71 circulation area adjusts damping size suffered by valve seat core 30.
In conjunction with shown in Figure 3, third embodiment according to the present invention exists with the difference of one embodiment
In in the present embodiment, the first end of nut 70 is tube-in-tube structure, and the outer diameter of the tube-in-tube structure is less than or equal to the second valve seat
The internal diameter of 20 second sleeve 25, is set in the first end of nut 70 in second sleeve 25, and in second sleeve 25
Interior extension, the first end end in the insertion second sleeve 25 of nut 70 form the position limiting structure 23 of limit valve seat core 30.
In the present embodiment, the entire outer diameter of nut 70 is smaller, can partially protrude into second sleeve 25 as limit valve
The position limiting structure 23 of the axial movement position of seat core 30 does not need to carry out other transformations to nut 70 again, therefore structure is simpler
Single, processing is also more convenient, can reduce manufacturing procedure, reduces processing cost, improves processing efficiency.
It is essentially identical with one embodiment in conjunction with shown in Figure 4, the 4th embodiment according to the present invention, no
It is with place, in the present embodiment, the first end end of nut 70 has stepped hole, 25 sets of the second sleeve of the second valve seat 20
It is located in the large diameter hole 73 of 70 first end end of nut, and is coaxially disposed with nut 70, so as to realize to screw rod 80, needle
60 and spool bore 31 accurate guiding, guarantee needle 60 move fluency and reliability.
In the present embodiment, step of the end abutment of the second sleeve 25 of the second valve seat 20 in the stepped hole of nut 70
On, since the internal diameter of the diameter holes 74 of nut 70 is less than the internal diameter of second sleeve 25, the inner hole and nut of second sleeve 25
Stepped hole is still formed between 70 diameter holes 74, the diameter holes of the stepped hole are the diameter holes 74 of nut 70, the stepped hole
Large diameter hole is the internal diameter of second sleeve 25, and position limiting structure 23 is formed by step between second sleeve 25 and nut 70, due to
The step is located on the sliding path of valve seat core 30, and the small-bore of the step is less than the outer diameter of valve seat core 30, therefore valve seat core
30 can not continue to be axially moved after the step for reaching the stepped hole, to form axial limiting to valve seat core 30.
It is essentially identical with the 4th embodiment in conjunction with shown in Figure 5, the 5th embodiment according to the present invention, no
It is with place, in the present embodiment, position limiting structure 23 is the first end end for being fastened on the second valve seat 20 and the platform of nut 70
Baffle ring between the step in rank hole.First face of the baffle ring is connected on the first end end face of the second valve seat 20, and the second face abuts
It is compressed on the step surface of stepped hole, and through the cooperation between the second valve seat 20 and nut 70, valve seat core 30 passes through the baffle ring
Realize the limit of axial direction.
Preferably, the first end of nut 70 can also be arranged with first sleeve 72, and first sleeve 72 extends to valve seat core 30,
Needle 60 is slidably disposed in first sleeve 72.It is arranged first sleeve 72 in nut 70, can simplify nut 70 itself
Structure, reduce the difficulty of processing of nut 70, and be also convenient for subsequent replacement and maintenance work.For the first end of nut 70
It is arranged for the structure of first sleeve 72, the second end of the second valve seat 20 combines to form limit knot with the first end of first sleeve 72
Structure 23, to limit sliding position of the valve seat core 30 in the second valve seat 20.The second end of second valve seat 20 and first sleeve 72
First end combines and is formed by position limiting structure 23 between the position limiting structure 23 to be formed and above-mentioned nut 70 and the second valve seat 20
Mode is similar, only by the direct connection relational replacement between original nut 70 and the second valve seat 20 in order to which nut 70 passes through the
The mode that one sleeve 72 and the second valve seat 20 are attached.
In conjunction with shown in Figure 6, in the present embodiment, the second valve seat 20 be also include pedestal 24 and second sleeve 25, but
Be pedestal 24 and second sleeve 25 is machine-shaping respectively, be then fixedly connected and be integrally formed, pedestal 24 and second sleeve 25 it
Between can be welded as a whole, can also be fixed together by helicitic texture etc..
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of electric expansion valve characterized by comprising
First valve seat (10)；
Second valve seat (20), is fixedly connected on the first end end of first valve seat (10), and the of second valve seat (20)
One end end is provided with primary valve (21), is provided on the side wall of second valve seat (20) through second valve seat (20)
The first circulation passage (22) of side wall；
Valve seat core (30) is slidably disposed in second valve seat (20) to turn on or off the primary valve (21),
It include the spool bore (31) for being connected to the primary valve (21)；
Horizontal adapter tube (40), is connected to the inner cavity of first valve seat (10)；
Vertical joint pipe (50), is fixedly connected on the outlet port of the primary valve (21)；
Needle (60) is correspondingly arranged with the spool bore (31) of the valve seat core (30)；
Nut (70), setting is in first valve seat (10)；
Screw rod (80) is reciprocally screwed onto the nut (70), described in driving along the moving direction of the needle (60)
Needle (60) is mobile to turn on or off the spool bore (31) along the glide direction of the valve seat core (30)；
Second circulation passage (71) is arranged on the nut (70), and will the inner cavity of second valve seat (20) and described the
The inner cavity of one valve seat (10) is connected；
First circulation passage (22) is when the valve seat core (30) opens primary valve (21) by the primary valve (21)
It is connected with the inner cavity of first valve seat (10)；
The second end of second valve seat (20) combines to be formed position limiting structure (23) with the first end of the nut (70), limits institute
Sliding position of the valve seat core (30) in second valve seat (20) is stated, and valve seat core (30) are limited the first of nut (70)
It holds on end face；
The needle (60) and the nut (70) cooperate, and move up and down in the nut (70).
2. electric expansion valve according to claim 1, which is characterized in that the first end of the nut (70) is socketed on described
The second end of second valve seat (20).
3. electric expansion valve according to claim 1, which is characterized in that the position limiting structure (23) and first circulation
It is provided with third circulation passage (75) on the second valve seat (20) side wall between channel (22), the third circulation passage
(75) when the valve seat core (30) closes primary valve (21) by the inner cavity of second valve seat (20) and first valve
The inner cavity of seat (10) is connected.
4. electric expansion valve according to claim 1, which is characterized in that second valve seat (20) include pedestal (24) and
The second sleeve (25) being fixedly connected with the pedestal (24), the pedestal (24) are fixed at first valve seat (10)
On, the valve seat core (30) is slidably disposed in the second sleeve (25).
5. electric expansion valve according to claim 4, which is characterized in that the nut (70) is socketed on the second sleeve
(25), be radially arranged in the nut (70) close described second of second circulation passage (71) along the nut (70)
The first end of valve seat (20).
6. electric expansion valve according to claim 5, which is characterized in that the first end end of the nut (70) is provided with
End bosses (76), form catching step between the end bosses (76) and the first end end face of the nut (70), and second
For the second end end abutment of sleeve (25) on the catching step, the end bosses (76) are set in the second sleeve
(25) in, the position limiting structure (23) is the end bosses (76).
7. electric expansion valve according to claim 5, which is characterized in that the nut (70) is set in the second sleeve
(25) in, the first end end in the insertion second sleeve (25) of the nut (70) is the limit valve seat core (30)
The position limiting structure (23).
8. electric expansion valve according to claim 5, which is characterized in that the nut (70) has a stepped hole, and described the
Two sleeves (25) are set in the large diameter hole (73) of the nut (70), and the internal diameter of the diameter holes (74) of the nut (70) is less than
The internal diameter of the second sleeve (25), the step of the stepped hole are the position limiting structure for limiting the valve seat core (30)
(23)。
9. electric expansion valve according to claim 5, which is characterized in that the nut (70) has a stepped hole, and described the
Two sleeves (25) are set in the large diameter hole (73) of the nut (70), and the position limiting structure (23) is to be fastened on described second set
Baffle ring between the first end end of cylinder (25) and the step of the stepped hole.
10. electric expansion valve according to claim 1, which is characterized in that when the electric expansion valve is reversely operated, work as institute
When stating valve seat core (30) unlatching primary valve (21), the needle (60) opens the spool bore (31).
11. electric expansion valve according to any one of claim 1 to 10, which is characterized in that the of the nut (70)
One end is also socketed with first sleeve (72), and first sleeve (72) the Xiang Suoshu valve seat core (30) extends, and the needle (60) can
It is slidably arranged in the first sleeve (72)；The second end of second valve seat (20) and the first end of first sleeve (72)
Combination forms the position limiting structure (23), to limit sliding position of the valve seat core (30) in second valve seat (20).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410500188.6A CN105508623B (en) | 2014-09-26 | 2014-09-26 | Electric expansion valve |
| JP2015004815U JP3202781U6 (en) | 2015-09-24 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410500188.6A CN105508623B (en) | 2014-09-26 | 2014-09-26 | Electric expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105508623A CN105508623A (en) | 2016-04-20 |
| CN105508623B true CN105508623B (en) | 2019-07-12 |
Family
ID=55360971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410500188.6A Active CN105508623B (en) | 2014-09-26 | 2014-09-26 | Electric expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105508623B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420566B (en) * | 2016-05-23 | 2020-04-14 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| CN107655241B (en) * | 2016-07-26 | 2021-11-30 | 浙江盾安禾田金属有限公司 | Pilot-operated electronic expansion valve |
| CN108692081A (en) * | 2017-04-07 | 2018-10-23 | 浙江盾安机械有限公司 | Electric expansion valve |
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| CN203604661U (en) * | 2013-09-30 | 2014-05-21 | 苏州优冷机电科技有限公司 | Electronic expansion valve |
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| JP2009287913A (en) * | 2008-05-29 | 2009-12-10 | Saginomiya Seisakusho Inc | Expansion valve, heat pump type refrigerating cycle, and air conditioner |
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| CN103388694A (en) * | 2012-05-11 | 2013-11-13 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN103423460A (en) * | 2012-05-18 | 2013-12-04 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN103512288A (en) * | 2012-06-20 | 2014-01-15 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN103511636A (en) * | 2012-06-27 | 2014-01-15 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN203604661U (en) * | 2013-09-30 | 2014-05-21 | 苏州优冷机电科技有限公司 | Electronic expansion valve |
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| JP3202781U (en) | 2016-02-25 |
| CN105508623A (en) | 2016-04-20 |
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