CN109458464A - Electric expansion valve - Google Patents
Electric expansion valve Download PDFInfo
- Publication number
- CN109458464A CN109458464A CN201811389329.6A CN201811389329A CN109458464A CN 109458464 A CN109458464 A CN 109458464A CN 201811389329 A CN201811389329 A CN 201811389329A CN 109458464 A CN109458464 A CN 109458464A
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- CN
- China
- Prior art keywords
- valve
- electric expansion
- expansion valve
- port
- valve port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000003507 refrigerant Substances 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Lift Valve (AREA)
Abstract
The technical issues of the present invention provides a kind of electric expansion valves, are related to expansion valve field, and the increase of thread friction power can improve the abrasion of screw thread between threaded rod and nut when solving closed state existing in the prior art.The electric expansion valve includes including valve seat and valve rod assembly, wherein: valve port is equipped in the valve seat, the valve rod assembly is movably threaded through in the valve port along the valve seat axis direction, and the valve rod assembly can cooperate with the sealing valve port so that the valve port is in close state and when valve port is in close state valve rod assembly remains to continue to move into the valve port in the case where the magnetic rotor component of electric expansion valve drives.The present invention is used to improve the service life of electric expansion valve.
Description
Technical field
The present invention relates to expansion valve technical fields, more particularly, to a kind of electric expansion valve.
Background technique
Electric expansion valve be by applying pulse current to coil part come the rotation of application valve body portion magnet and valve rod assembly,
The opposite valve port of the needle of valve rod assembly is set to retreat with the screw thread feeding effect of valve rod assembly and nut, so that control passes through valve port
The flow of fluid.
Currently, the sealing of electric expansion valve full off state is to squeeze the linear sealing of valve port by needle to realize.Such as Fig. 1 and
Fig. 2 show the structure of electric expansion valve in the prior art, and valve rod assembly mainly has threaded rod 1, needle body 2, steel ball 3, bullet
The valve port 5 of spring 4 and other auxiliary components, electric expansion valve in the prior art mainly uses stainless steel material.Electronic expansion
After the coil of valve is passed through pulse current, magnet rotor 12 can rotate, and magnet rotor 12 is interior by the external screw thread of threaded rod 1 and nut 13
It is threadedly engaged, magnet rotor 12 is changed into the linear motion up and down of threaded rod 1, to make to drive needle body 2 with respect to valve
Mouth 5 moves, the tapered design in the head of needle body 2, to adjust the refrigerant flow by valve port, the valve rod of electric expansion valve
Component toward the direction of close port 5 when axially moving, when the needle body 1 of valve rod assembly is in contact with following valve port 5, spiral shell
Rasp bar 1 starts needle body 2 to generate an axial compressive force.
Applicants have discovered that at least there is following technical problem in the prior art:
With being further turned off for valve rod assembly, 1 compressed spring 4 of threaded rod, to generate axial compressive force to needle body 2.
When electric expansion valve is under full off state, 4 decrement of spring is maximum, and spring 4 squeezes needle body 2 axial compressive force of needle body 2
Pressure valve mouth 5 realizes the linear sealing of valve port 5.At this point, spring 4 generates a reversed elastic force, the external screw thread of threaded rod 1 to threaded rod 1
Frictional force between 13 internal screw thread of nut becomes larger.This state is the state for being easiest to occur clamping stagnation, while threaded rod 1 and nut
The increase of 13 thread friction power can improve the abrasion of screw thread, shorten the service life of electric expansion valve.If outlet pressures are greater than
Import end pressure, and when pressure difference is greater than spring force, needle body 2 can be opened, and sealing function is lost.In addition, the structure
Valve rod assembly includes that components are numerous, and assembling procedure is more, higher cost.
Summary of the invention
The purpose of the present invention is to provide a kind of electric expansion valve, spiral shell when solving closed state existing in the prior art
The technical issues of increase of thread friction power can improve the abrasion of screw thread between rasp bar and nut.Many technical sides provided by the invention
Many technical effects elaboration as detailed below that optimal technical scheme in case can be generated.
To achieve the above object, the present invention provides following technical schemes:
Electric expansion valve provided by the invention, including valve seat and valve rod assembly, in which: valve port, institute are equipped in the valve seat
It states valve rod assembly to be movably threaded through in the valve port along the valve seat axis direction, the valve rod assembly can be with the valve port
Sealing cooperates so that the valve port is in close state and the valve rod assembly is swollen in electronics when the valve port is in close state
The magnetic rotor component of swollen valve remains to continue to move into the valve port under driving.
Preferably, the valve rod assembly includes valve rod and the needle that is connected with the valve rod, wherein the needle includes
Straight line portion and tapering, the tapering are connected with the straight line portion, and the straight line portion is connected with the valve rod, the straight line portion
Cooperate with the sealing valve port.
Preferably, the straight line portion and the valve port are interference fitted.
Preferably, the valve rod includes threaded rod and valve stem body, the magnetic turn of the threaded rod and the electric expansion valve
Sub-component is connected, and one end of the valve stem body is fixedly connected with the threaded rod or integral type is connect, the valve stem body
The other end extend to form the needle along its axial direction.
Preferably, the valve rod is an integral structure with the needle.
Preferably, the valve port is made of polytetrafluoroethylene (PTFE) material.
Preferably, the electric expansion valve further includes shell, and the partial sector of the valve seat is arranged in the shell, institute
It states and is equipped with valve port in the one end for stretching out the shell on valve seat；The magnetic rotor component is located in the shell, the valve rod group
The first end of part is connected with the magnetic rotor component, and the second end of the valve rod assembly is matched with the valve port to change and flow through
The cold medium flux of the valve port.
Preferably, the magnetic rotor component includes magnet rotor, wherein the magnet rotor be arranged in the shell and with institute
It states one end on threaded rod far from the valve stem body to be connected, the partial sector of the threaded rod and the intracorporal nut of the shell
It is threadedly coupled, the nut and the valve seat are interference fitted.
Preferably, it is provided with axially extending bore in the nut, internal screw thread, the threaded rod are provided in the axially extending bore
On be provided with external screw thread, the threaded rod is located in the axially extending bore and is threadedly coupled with nut formation.
Preferably, it is provided on the valve seat and supports the support portion of the shell and the support portion is fixed with the shell
Connection.
Preferably, the electric expansion valve further includes " L " type adapter tube and " I " type adapter tube, " L " type adapter tube and described
" I " type adapter tube, which is both connected on the valve seat, constitutes the flow cycle of refrigerant.
Preferably, the through slot penetrated through in the axial direction is formed on the valve seat, the bearing block of insertion matching in the through slot,
Axially extending bore is formed in the bearing block, the lower end of the axially extending bore is equipped with mounting groove, is provided in the mounting groove described
Valve port, the middle position of the bearing block are provided with radial side through-hole, are provided in the middle part of the through slot of the valve seat and radial direction
The corresponding annular groove of side lead to the hole site, the valve seat outer wall are equipped with the lateral aperture communicated with the through slot, and the lateral aperture connects
It is connected to " L " the type adapter tube.
Preferably, the quantity of the radial side through-hole on the bearing block is at least two and the radial side is logical
Hole is uniformly distributed along the circumferencial direction of the bearing block.
Electric expansion valve provided by the invention, including valve seat and valve rod assembly, wherein valve port, valve rod group are equipped in valve seat
Part is movably threaded through in valve port along valve seat axis direction, and valve rod assembly can cooperate with sealing valve port so that valve port is in closing
State and valve rod assembly remains to continue to valve port in the case where the magnetic rotor component of electric expansion valve drives when valve port is in close state
Interior movement reduces the axially loaded of valve rod assembly when valve port is in close state compared with the prior art, to reduce valve
Frictional force between bar assembly and nut between screw thread improves the service life of electric expansion valve.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of electric expansion valve in the prior art；
Fig. 2 is the enlarged drawing of part A in Fig. 1；
Fig. 3 is the structural schematic diagram of electric expansion valve provided in an embodiment of the present invention；
Fig. 4 is the enlarged drawing of part B in Fig. 3；
Fig. 5 is the stereochemical structure cross-sectional view that valve seat, bearing block and valve port provided in an embodiment of the present invention assemble；
Fig. 6 is the sectional view of valve seat provided in an embodiment of the present invention；
Fig. 7 is the sectional view of bearing block provided in an embodiment of the present invention；
Fig. 8 is the sectional view of nut provided in an embodiment of the present invention；
Fig. 9 is the sectional view of valve rod assembly provided in an embodiment of the present invention.
Appended drawing reference: 1, threaded rod；2, needle body；3, steel ball；4, spring；5, valve port；6, shell；7, valve seat；71, side
Hole；8, annular groove；9, coil；10, valve stem body；11, needle；111, straight line portion；112, the first tapering；113, the second tapering；12,
Magnet rotor；13, nut；131, internal screw thread；14, apical axis；15, the first spring；16, positioning pin；17, second spring；18, it supports
Portion；19, " L " type is taken over；20, " I " type is taken over；21, bearing block；211, radial side through-hole；212, mounting groove；22, input end；
23, outlet end.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Referring to Fig. 3~Fig. 4, the present invention provides a kind of electric expansion valves, including valve seat 7 and valve rod assembly, in which: valve seat
Valve port 5 is equipped in 7, valve rod assembly is movably threaded through in valve port 5 along 7 axis direction of valve seat, and valve rod assembly can be close with valve port 5
Envelope cooperates so that valve port 5 is in close state and magnet rotor of the valve rod assembly in electric expansion valve when valve port 5 is in close state
12 components remain to continue to move into valve port 5 under driving.Electric expansion valve is the gap by controlling valve rod assembly and valve port 5,
To which the cold medium flux of valve port 5 is flowed through in control, for electric expansion valve, in most of stroke of valve rod assembly, valve rod assembly
It is to be detached between valve port, it is provided by the invention without the effect of mutual power, but when valve rod assembly and valve port 5 are closed
The effect of electric expansion valve can just embody, and valve rod assembly of the invention at this time remains to continue into valve port 5 after contacting with valve port 5
The distance of movement, this movement is accordingly designed according to the valve opening pulse of electric expansion valve.Compared with the prior art, originally
Invention reduces the axially loaded of valve rod assembly when valve port 5 is in close state, to subtract by using different encapsulating methods
Lack the frictional force between valve rod assembly and nut 13 between screw thread, improves the service life of electric expansion valve.Wherein, valve port 5 is adopted
It is preferably wear-resisting with sealing material, the polytetrafluoroethylene material of low-friction coefficient.
Specifically, as shown in figure 9, valve rod assembly includes valve rod and the needle connecting with valve rod 11, wherein valve rod includes spiral shell
Rasp bar 1 and valve stem body 10, threaded rod 1 are connected with the magnetic rotor component of electric expansion valve, one end of valve stem body 10 and spiral shell
Rasp bar 1 is fixedly connected or integral type connection, the other end of valve stem body 10 extend to form needle 11 along its axial direction.Needle 11
Including straight line portion 111 and tapering, tapering is connected with straight line portion 111, and straight line portion 111 is connected with valve rod, straight line portion 111 and valve
5 sealing cooperation of mouth, it is preferable that straight line portion 111 and valve port 5 are interference fitted.
As optionally embodiment of the embodiment of the present invention, tapering includes the first tapering 112 and the second tapering 113, and first
First cone angle in the connection straight line portion 111 of tapering 112 and the second tapering 113 and the first tapering 112 is less than the second tapering 113
Second cone angle beta, convenient for adjusting the flow of electric expansion valve, wherein the first cone angle can be between 1 ° to 5 °, and the second cone angle beta exists
Between 35 ° to 90 °, the design that second cone angle beta in the second tapering 113 is greater than first cone angle in the first tapering 112 can meet electricity
Control of the flow of sub- expansion valve in a larger range.
As optionally embodiment of the embodiment of the present invention, valve rod assembly includes valve rod and the needle connecting with valve rod 11,
Valve rod is an integral structure with needle 11.It is as shown in Figure 1 the structure of electric expansion valve in the prior art, valve rod assembly is main
There are threaded rod 1, needle body 2, steel ball 3, spring 4 and other auxiliary components, the valve rod assembly of existing structure includes that components are many
More, assembling procedure is more, higher cost, and the valve rod assembly in the present invention eliminates the design of steel ball 3 and spring 4, and structure is more
Simply.
Electric expansion valve further includes shell 6, and the partial sector of valve seat 7 is arranged in shell 6, and shell 6 is stretched out on valve seat 7
Valve port 5 is equipped in one end；Magnetic rotor component is located in shell 6, and the first end of valve rod assembly is connected with magnetic rotor component, valve rod group
The second end of part is matched with valve port 5 to change the cold medium flux of valve port 5.Electric expansion valve further includes " L " type adapter tube 19 and " I "
Type adapter tube 20, " L " type adapter tube 19 and " I " type adapter tube 20 are both connected on valve seat 7, and the flow cycle of refrigerant is collectively formed.
The magnetic rotor component of electric expansion valve provided in an embodiment of the present invention includes magnet rotor 12, wherein magnet rotor 12 is set
It sets in shell 6 and is connected with one end on threaded rod 1 far from bar body；Nut 13 is threadedly coupled with threaded rod 1, nut 13
It is interference fitted with valve seat 7.Specifically as shown in figure 8, being provided with axially extending bore in nut 13, internal screw thread is provided in axially extending bore
131, external screw thread is provided on threaded rod 1, threaded rod 1 is located in axially extending bore and is threadedly coupled with the formation of nut 13.
As shown in Fig. 5~Fig. 9, valve port 5 is connect by bearing block 21 with valve seat 7, specifically, being formed on valve seat 7 along axis
The through slot of direction perforation, the bearing block 21 that the interior insertion of through slot matches, bearing block 21 is interior to form axially extending bore, the lower end of axially extending bore
Equipped with mounting groove 212, valve port 5 is provided in mounting groove 212, the middle position of bearing block 21 is provided with radial side through-hole
211, the through slot middle part of valve seat 7 is provided with annular groove 8 corresponding with side lead to the hole site, and 7 outer wall of valve seat is equipped with and communicates with through slot
Lateral aperture 71, lateral aperture 71 is connected with " L " type adapter tube 19.Wherein, the quantity of the radial side through-hole 211 on bearing block 21 is
At least two and radial side through-hole 211 be uniformly distributed along the circumferencial direction of bearing block 21.
That is, one end of threaded rod 1 is connected with magnet rotor 12, needle 11 is matched with valve port 5 to change valve port 5
Cold medium flux, valve rod assembly has close port 5 and makes " L " type adapter tube 19 and first position that " I " type adapter tube 20 is not communicated with
With the second position for making valve port 5 circulate and communicate " L " type adapter tube 19 and " I " type adapter tube 20, the coil 9 of electric expansion valve is passed through
After pulse current, magnet rotor 12 in drive shell 6 rotates, and magnet rotor 12 is interior by the external screw thread of threaded rod 1 and nut 13
Screw thread 131 cooperates, and by the up and down motion for being changed into threaded rod 1 of magnet rotor 12, threaded rod 1 is connected with valve stem body 10
It connects, valve stem body 10 is connected with needle 11, and threaded rod 1 is enabled to drive needle 11 to exist with respect to valve port 5 by valve stem body 10
It is moved between first position and the second position, the design in 11 head of needle linear portion 111 and tapering, is passed through to adjust
The refrigerant flow of valve port 5, as shown in figure 4, when needle 11 is located at first position, needle 11 closes valve port 5, in valve port 5
Do not circulate refrigerant, and " L " type adapter tube 19 and " I " type adapter tube 20 are not communicated at this time；When needle 11 is located at the second position, needle 11
Valve port 5 can be made to be in circulation status (that is " L " type adapter tube 19 and " I " type adapter tube 20 communicate), have refrigerant in valve port 5
Pass through, when needle 11 is in the position of evacuation valve port 5 completely, the flow of electric expansion valve reaches maximum.Wherein, at needle 11
Also belonged in the case where position of evacuation valve port 5 completely we the described second position a kind of situation.It is straight when needle 11
(there is flow in valve port 5 for the valve opening point of electric expansion valve when line portion 111 starts to contact with valve port 5 and critical point without flow is
Valve opening point), then magnet rotor 12 is rotated by a certain angle toward closing direction, the angle is corresponding with valve opening umber of pulse, this position is electricity
Operation lower position, that is, full close position of sub- expansion valve.At this point, 11 straightway of needle is contacted with 5 inner hole of valve port, sealing is realized.When
After the straight line portion 111 of needle 11 and valve port 5 start contact, needle 11 continues to move toward closing direction, at this point, axially loaded only has
The frictional force of needle 11 and valve port 5 compares existing structure, and the axially loaded of valve rod assembly is small, reduces the frictional force between screw thread,
It improves service life.And the structure be not in 23 pressure of outlet end and 22 pressure difference of input end it is excessive when, needle 11 is pushed up
It opens, the case where seal failure, further, since the lubricity of polytetrafluoroethylene (PTFE) is good, coefficient of friction is low, this power is also relatively small.
In addition, electric expansion valve further includes stop assembly, wherein stop assembly includes: apical axis 14, the roof with shell 6
It is connected；First spring 15, is set on apical axis 14；Positioning pin 16, it is L-shaped, including a vertical section and a horizontal segment, it is horizontal
Section is fixedly connected on valve rod assembly；Second spring 17 is set on apical axis 14, and positioning pin 16 is rotated in valve rod assembly to be driven
Under, second spring 17 is stirred, second spring 17 is rotated in the helical orbit of the first spring 15, is changed into up and down motion, when
It when second spring 17 moves to the bound of the first spring 15, can be blocked, stop motion, so that valve rod assembly be prevented to continue to turn
It is dynamic, have the function that control valve rod assembly movement travel.The setting of the stop assembly has limited the maximum displacement of threaded rod 1, keeps away
Exempt to move to extruding valve port 5 after valve stem body is contacted with valve port 5 when threaded rod 1 moves downward.Supporing shell is provided on valve seat 7
6 support portion 18 and support portion 18 is fixedly connected by welding with shell 6.
More than, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (13)
1. a kind of electric expansion valve, which is characterized in that including valve seat (7) and valve rod assembly, in which:
Valve port (5) are equipped in the valve seat (7), the valve rod assembly is movably threaded through along the valve seat (7) axis direction
In the valve port (5), the valve rod assembly can seal cooperation so that the valve port (5) is in close state with the valve port (5)
And the valve port (5) when being in close state the valve rod assembly remain to continue in the case where the magnetic rotor component of electric expansion valve drives
The movement into the valve port (5).
2. electric expansion valve according to claim 1, which is characterized in that the valve rod assembly include valve rod and with the valve
The needle (11) that bar is connected, in which:
The needle (11) includes straight line portion (111) and tapering, and the tapering is connected with the straight line portion (111), described straight
Line portion (111) is connected with the valve rod, and the straight line portion (111) and the valve port (5) sealing cooperate.
3. electric expansion valve according to claim 2, which is characterized in that the straight line portion (111) and the valve port (5) mistake
It is full of cooperation.
4. electric expansion valve according to claim 2, which is characterized in that the valve rod includes threaded rod (1) and valve rod sheet
Body (10), the threaded rod (1) are connected with the magnetic rotor component of the electric expansion valve, one end of the valve stem body (10)
It is fixedly connected with the threaded rod (1) or integral type is connect, the other end of the valve stem body (10) extends along its axial direction
Form the needle (11).
5. electric expansion valve according to claim 2, which is characterized in that the valve rod is integral type with the needle (11)
Structure.
6. electric expansion valve according to claim 1, which is characterized in that the valve port (5) uses polytetrafluoroethylene (PTFE) material
It is made.
7. electric expansion valve according to claim 4, which is characterized in that the electric expansion valve further includes shell (6), institute
The partial sector setting of valve seat (7) is stated in the shell (6), stretches out in one end of the shell (6) and sets on the valve seat (7)
There are valve port (5)；The magnetic rotor component is located in the shell (6), the first end of the valve rod assembly and the magnet rotor group
Part is connected, and the second end of the valve rod assembly is matched with the valve port (5) to change the refrigerant stream for flowing through the valve port (5)
Amount.
8. electric expansion valve according to claim 7, which is characterized in that the magnetic rotor component includes magnet rotor (12),
Wherein, the magnet rotor (12) setting in the shell (6) and on the threaded rod (1) far from the valve stem body (10)
One end be connected, the partial sector of the threaded rod (1) is threadedly coupled with the nut (13) in the shell (6), the spiral shell
Female (13) and the valve seat (7) are interference fitted.
9. electric expansion valve according to claim 8, which is characterized in that it is provided with axially extending bore in the nut (13),
It is provided in the axially extending bore internal screw thread (131), external screw thread is provided on the threaded rod (1), the threaded rod (1) is located at
It is formed in the axially extending bore and with the nut (13) and is threadedly coupled.
10. electric expansion valve according to claim 7, which is characterized in that be provided with the support shell on the valve seat (7)
The support portion (18) and the support portion (18) of body (6) are fixedly connected with the shell (6).
11. electric expansion valve according to claim 1, which is characterized in that the electric expansion valve further includes " L " type adapter tube
(19) it is both connected on the valve seat (7) with " I " type adapter tube (20), " L " the type adapter tube (19) and " I " type adapter tube (20)
Constitute the flow cycle of refrigerant.
12. electric expansion valve according to claim 11, which is characterized in that formed in the axial direction on the valve seat (7)
The through slot of perforation, the bearing block (21) that the interior insertion of the through slot matches, the bearing block (21) is interior to form axially extending bore, the axis
Mounting groove (212) are equipped with to the lower end of through-hole, are provided with the valve port (5) in the mounting groove (212), the bearing block (21)
Middle position be provided with radial side through-hole (211), be provided with and radial side through-hole in the middle part of the through slot of the valve seat (7)
(211) the corresponding annular groove in position (8), valve seat (7) outer wall are equipped with the lateral aperture (71) communicated with the through slot, the side
Face (71) is connected with " L " the type adapter tube (19).
13. electric expansion valve according to claim 12, which is characterized in that the radial side on the bearing block (21)
The quantity of face through-hole (211) be at least two and the radial side through-hole (211) along the bearing block (21) circumferencial direction
It is uniformly distributed.
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| CN109458464B CN109458464B (en) | 2024-03-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901793A (en) * | 2019-12-04 | 2021-06-04 | 伊希欧1控股有限公司 | Expansion valve |
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| WO2015143844A1 (en) * | 2014-03-25 | 2015-10-01 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN105972233A (en) * | 2016-07-20 | 2016-09-28 | 珠海格力电器股份有限公司 | Expansion valve, refrigerant circulation system and air conditioner |
| CN209370495U (en) * | 2018-11-20 | 2019-09-10 | 珠海励高精工制造有限公司 | Electric expansion valve |
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| CN102889410A (en) * | 2012-06-29 | 2013-01-23 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| CN103968620A (en) * | 2013-01-28 | 2014-08-06 | 珠海格力电器股份有限公司 | Electronic expansion valve and refrigerating device with same |
| CN104930241A (en) * | 2014-03-19 | 2015-09-23 | 浙江三花股份有限公司 | Electronic expansion valve |
| WO2015143844A1 (en) * | 2014-03-25 | 2015-10-01 | 浙江三花股份有限公司 | Electronic expansion valve |
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| CN109458464B (en) | 2024-03-22 |
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