CN110296267A - Electric expansion valve - Google Patents
Electric expansion valve Download PDFInfo
- Publication number
- CN110296267A CN110296267A CN201810247873.0A CN201810247873A CN110296267A CN 110296267 A CN110296267 A CN 110296267A CN 201810247873 A CN201810247873 A CN 201810247873A CN 110296267 A CN110296267 A CN 110296267A
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- China
- Prior art keywords
- nut
- support frame
- electric expansion
- screw rod
- core component
- 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.)
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- 239000008358 core component Substances 0.000 claims abstract description 84
- 230000013011 mating Effects 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 239000000306 component Substances 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000033001 locomotion Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 210000000664 rectum Anatomy 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
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- 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
-
- 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
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- 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
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
- F16K31/508—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The present invention provides a kind of electric expansion valves, comprising: valve seat, valve seat have valve support chamber and valve port；Core component, core component are at least partly movably arranged at valve support chamber；Screw rod and nut, with nut by being threadedly engaged, nut is fixedly connected screw rod with core component；Support frame, support frame are directly or indirectly fixedly connected with valve seat, and support frame is equipped with mating groove, and nut is equipped with protrusion, and protrusion is matched with mating groove；Driving mechanism, including rotor and coil, rotor is fixedly connected with screw rod, rotor drives screw rod rotation by coil, by being threadedly engaged effect and mating reaction with mating groove with screw rod, nut can be moved in axial direction and without circumferentially rotating, and core component can be close to or away from valve port by the drive of nut.The problem of high production cost that can efficiently solve electric expansion valve in the prior art that applies the technical scheme of the present invention.
Description
Technical field
The present invention relates to refrigeration control technical fields, in particular to a kind of electric expansion valve.
Background technique
In current electronic expansion valve structure, by drive part (coil, rotor) and flow control division point (nut, silk
Bar, shell, needle, valve seat, valve seat core, adapter tube etc.) composition.Wherein, rotor and screw rod are drivingly connected, and nut is fixed on valve seat
And connect with wire rod thread, needle is fixedly connected with screw rod.In this way, turning when rotor rotates under the effect of external coil drive
Son is able to drive screw rod and rotates along its axis, simultaneously as screw rod and nut thread cooperate, so that screw rod is rotated along its axis
While can also be moved along its axis.Since needle is fixedly connected with screw rod, needle being capable of edge under the driving of screw rod
The axis of screw rod is mobile, to realize the valve port opened and closed on valve seat core.Although above structure can be realized adjusting flow
Function still moved axially again along its axis since screw rod is rotated along its axis, although above structure can be realized adjusting
The function of flow, still, since rotor can move up and down together with screw rod, and coil is motionless, with the decline of screw rod, rotor from
Coil is more and more remoter, and driving force is also smaller and smaller, and required driving force often needs real by modes such as amplification coil, rotor volumes
It is existing, to increase the integrally-built volume of electric expansion valve and increase manufacturing cost.
Summary of the invention
The main purpose of the present invention is to provide a kind of electric expansion valves, can reduce the volume of electric expansion valve entirety,
Reduce production cost.
To achieve the goals above, the present invention provides a kind of electric expansion valves, comprising: valve seat, valve seat have valve support chamber
And valve port；Core component, core component are at least partly movably arranged at valve support chamber；Screw rod and nut, screw rod with
By being threadedly engaged, nut is fixedly connected nut with core component；Support frame, support frame and valve seat are directly or indirectly fixed to be connected
It connects, support frame is equipped with mating groove, and nut is equipped with protrusion, and protrusion is matched with mating groove；Driving mechanism, including rotor and
Coil, rotor are fixedly connected with screw rod, rotor by coil drive screw rod rotate, by with screw rod be threadedly engaged effect and
With the mating reaction of mating groove, nut can be moved in axial direction and without circumferentially rotating, and core component passes through nut
Drive can be close to or away from valve port.
It applies the technical scheme of the present invention, the core component of electric expansion valve is fixedly connected with nut, and nut passes through screw rod
With the mating reaction acted on and with support frame that is threadedly engaged of nut, nut is able to drive core component and carries out axial lifting fortune
It moves so that close to or away from valve port, electric expansion valve matched by the protrusion of nut with the mating groove of support frame when actuation
Effect prevents rotating in a circumferential direction for nut and core component, for opposing nut, screw rod and the same screw rod of the rotor connecting with screw rod
Only rotated in a circumferential direction together and without axial elevating movement, therefore in the axial direction rotor would not be generated with coil it is opposite
Displacement.Above structure makes no matter core component is close to valve port or far from valve port, and rotor can give full play to its magnetism, it is not necessary to
Guarantee driving force by increasing the volume of coil, to reduce the volume of electric expansion valve product, reduces production cost.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the vertical profile structural schematic diagram of the embodiment one of electric expansion valve according to the present invention；
Fig. 2 shows the enlarged structure schematic diagrams at the A of the electric expansion valve of Fig. 1；
Fig. 3 shows the vertical profile structural schematic diagram of the electric expansion valve of Fig. 1, wherein Fig. 3 show dimension D 1, D2, D3 with
And D4；
Fig. 4 shows the schematic perspective view of the nut of the electric expansion valve of Fig. 1；
Fig. 5 shows the schematic perspective view of the support frame of the electric expansion valve of Fig. 1；
Fig. 6 shows the vertical profile structural schematic diagram of the embodiment two of electric expansion valve according to the present invention；
Fig. 7 shows the schematic perspective view of the support frame of the electric expansion valve of Fig. 6；
Fig. 8 shows the vertical profile structural schematic diagram of the embodiment three of electric expansion valve according to the present invention；
Fig. 9 shows the schematic perspective view of the support frame of the electric expansion valve of Fig. 8；And
Figure 10 shows the vertical profile structural schematic diagram of the example IV of electric expansion valve according to the present invention.
Wherein, the above drawings include the following reference numerals:
1, cavity；4, valve support chamber；10, valve seat；11, valve seat body；12, attachment base；121, attachment base chamber；13, valve port；
14, first interface；15, second interface；20, core component；21, the first core segment；22, the second core segment；23, joint face；30,
Screw rod；40, nut；41, nut body portion；42, protrusion；50, driving mechanism；51, rotor；52, coil；60, shell；70,
Support frame；71, hole section is limited；72, mating groove；73, it is oriented to hole section；74, upper cylinder section；75, lower cylinder section；76, step surface；90, it props up
Frame；110, the first elastic component；150, upper baffle ring；160, lower baffle ring；170, sealing structure；180, the second elastic component；190, slow down
Mechanism；200, locating shaft.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figures 1 to 5, the electric expansion valve of embodiment one includes valve seat 10, core component 20, screw rod 30, nut
40, support frame 70 and driving mechanism 50.Wherein, valve seat 10 has valve support chamber 4 and valve port 13.At least portion of core component 20
Divide and is movably arranged at valve support chamber 4.Screw rod 30 and nut 40, screw rod 30 and nut 40 by being threadedly engaged, nut 40 with
Core component 20 is fixedly connected.Support frame 70 is directly or indirectly fixedly connected with valve seat 10, and support frame 70 is equipped with mating groove 72, spiral shell
Mother 40 is equipped with protrusion 42, and protrusion 42 is matched with mating groove 72.Driving mechanism 50 includes rotor 51 and coil 52, rotor
51 be fixedly connected with screw rod 30, and rotor 51 drives screw rod 30 to rotate by coil 52, by being threadedly engaged effect with screw rod 30
And with 72 mating reaction of mating groove, nut 40 can move in axial direction and without circumferentially rotating, and core component 20 is logical
The drive for crossing nut 40 can be close to or away from valve port 13.
The core component 20 of the technical solution of Application Example one, electric expansion valve is fixedly connected with nut 40, nut 40
It is threadedly engaged effect and mating reaction with support frame 70 by screw rod 30 and nut 40, nut 40 is able to drive core group
Part 20 carries out axial elevating movement with close to or away from valve port 13, passes through the protrusion of nut 40 when electric expansion valve carries out actuation
The effect of matching with the mating groove 72 of support frame 70 prevents rotating in a circumferential direction for nut 40 and core component 20, opposing nut 40 and
Speech, screw rod 30 and the rotor 51 connecting with screw rod 30 are only rotated in a circumferential direction together with screw rod 30 and are transported without axial lifting
It is dynamic, therefore rotor 51 would not generate relative displacement with coil 52 in the axial direction.Above structure make no matter core component 20
Close to valve port 13 or far from valve port 13, rotor 51 can give full play to its magnetism, it is not necessary to by increase the volume of coil 52 come
Guarantee that driving force reduces production cost to reduce the volume of electric expansion valve product.
Specifically, with the rotation of screw rod 30, the nut 40 being threadedly engaged with screw rod 30 also has the trend of rotation, works as spiral shell
When mother 40 rotates, the protrusion 42 of nut 40 can be abutted with the cell wall of mating groove 72, to prevent nut 40 from circumferentially rotating.But with
The rotation of screw rod 30, nut 40 can be moved up and down along its axial direction.The core component being fixedly connected in this way with nut 40
20 also can be carried out axial movement, thus realize core component 20 far from or close to valve port 13.
It should be noted that nut 40 is fixedly connected with core component 20, above-mentioned " being fixedly connected " refers to nut 40 not
The opposite core component 20 of energy can not be rotated along the axial movement of core component 20 relative to core component 20.
It should also be noted that, supporting it will be appreciated by those skilled in the art that mating groove can also be arranged on nut
Protrusion with mating groove cooperation is set on part, as relevant alternative solution.
As shown in Figure 1, in example 1, valve seat 10 includes valve seat body 11 and attachment base 12, attachment base 12 and valve
Seat ontology 11 is fixedly connected, and valve port 13 is set to valve seat body 11, and attachment base 12 has attachment base chamber 121, and core component 20 is pressed
It is fitted into attachment base chamber 121, support frame 70 is fixedly connected by attachment base 12 with valve seat body 11.Above structure is simple, convenient
Assembly and processing.
As shown in Figure 1, Figure 2 and Figure 4, in example 1, nut 40 includes nut body portion 41 and is arranged in nut
On the side wall of body part 41 and outwardly extending protrusion 42, it is provided with threaded hole in nut body portion 41, screw rod 30 is arranged in
Threaded hole.Above structure is simple, easy to process.
As shown in Figure 1, Figure 2 and shown in Fig. 5, in example 1, support frame 70 is cup-shaped, and support frame 70 includes side wall, support
The side wall of frame 70 is fixedly connected with attachment base 12, and screw rod 30 penetrates the inner cavity of support frame 70, spiral shell along the axis direction of support frame 70
At least part of mother 40 is located at inner cavity, and side wall is provided with the first opening, and nut 40, which is provided with, protrudes into the first convex of the first opening
Block, the first opening form mating groove 72, and the first convex block forms protrusion 42.It is rotated when having under driving of the nut 40 in screw rod 30
Trend when, first opening mouth wall can be abutted with the side wall of the first convex block, to prevent stop-band have the nut 40 of the first convex block after
Continuous rotation.In this way, nut 40 only can be moved in axial direction under the cooperation with screw rod 30.
As shown in Figure 1 and Figure 5, in example 1, support frame 70 includes upper cylinder section 74 and lower cylinder section 75, wherein upper cylinder section
74 outer diameter is less than the outer diameter of lower cylinder section 75, the junction formation step surface 76 of upper cylinder section 74 and lower cylinder section 75, and the first opening is set
It sets the bottom in lower cylinder section 75 and upwardly extends.Step surface 76 can support the bottom of rotor 51.
As depicted in figs. 1 and 2, in example 1, the gravity of nut 40 is undertaken by core component 20, due to electronic expansion
Valve can generate vibration at work, therefore nut 40 may be relative to the upward play of core component 20.In order to solve above-mentioned ask
Topic, in the present embodiment, support frame 70 further includes roof, and screw rod 30 is arranged in roof and protrudes into inner cavity, the upper surface of nut 40
Be provided with the first elastic component 110 between roof, the first elastic component 110 downward power is applied to nut 40 with prevent nut 40 to
Upper play.In said structure, nut 40 can be pressed on core component 20 by the first elastic component 110, reduce electronic expansion
When Valve Vibration, the noise of nut 40 and the collision generation of core component 20.
It should be noted that the first convex block and the first opening cooperate, realizing nut 40 cannot be relative to core component 20
The purpose of rotation, and the first elastic component 110 between the upper surface of nut and roof realize nut 40 cannot be with respect to core group
The purpose that part 20 moves along its axis.Finally realize the purpose that nut 40 is fixedly connected with core component 20.Certainly, this field
Technical staff should be known that nut 40 and core component 20 can also by it is be bonded, the modes such as weld and link together.
It should also be noted that, 70 one side of support frame can provide it upward power in 51 rotary course of rotor,
On the other hand the support frame passes through and the downward preload of rotor 51 is realized in the combination of the first elastic component 110, nut 40, reduces rotor
51 transmission and the pulse deviation as caused by vibration, flow deviation improve flow consistency, stability when adjusting refrigerant,
Realize that delicate flow adjusts control, which there are multiple purposes as a components, so that the structure of electric expansion valve
More succinct, assembly is more convenient,
In the prior art, it usually is internally provided with spring in core component, screw rod can support spring, so that core group
Part is supported at valve port under the action of the elastic force of spring, to close valve port.In order to time larger range of flow tune
Section, can generally increase the latus rectum of valve port.But with the increase of valve port latus rectum, when core component blocks the when institute at valve port
Upwarding pressure for being subject to also increases with it.In order to overcoming above-mentioned pressure, can generally increase the volume of spring with increase to
Under support power.Since the volume of spring increases, under identical decrement, driving mechanism applies downward support to spring
Top power can also increase accordingly, and finally make the volume of coil have to increase accordingly, the volume of electric expansion valve is caused to increase
Greatly, cost greatly improves.
To solve the above-mentioned problems, as shown in Figure 1 to Figure 3, in example 1, it is provided on valve seat 10 spaced
First interface 14 and second interface 15, first interface 14 are connected to valve port 13, and core component 20 is internally provided with to be connected with valve port 13
Logical cavity 1, is tightly connected between core component 20 and valve seat 10.Above structure makes, and first interface 14 is passed through with the formation of cavity 1
It wears, when core component 20 is located at detent position (core component 20 block position) at valve port 13, and refrigerant is from first interface
When 14 entrance cavity 1, core component 20 is blocked by the downward driving force of downward difference force and driving mechanism 50 in valve port 13
Place, and it is maintained at detent position.Above-mentioned difference force is formed by the effect of difference in areas and pressure.Since above structure no longer needs
Will by spring to core component 20 apply it is downward support power, spring and coil so even the latus rectum of valve port 13 becomes larger
Volume need not also become larger therewith.
As shown in Figure 1 to Figure 3, in example 1, core component 20 includes the first core segment 21 and the second core segment
22, the outer diameter of the second core segment 22 is adapted to the cavity wall of attachment base chamber 121, electric expansion valve further include setting attachment base 12 with
Sealing structure 170 between first core segment 21, with the gap between tight connecting seat 12 and the first core segment 21.Wherein,
One core segment 21 is fixedly connected with nut 40, and the bottom end of the second core segment 22 can be plugged in valve port 13, the second core segment 22
Outer diameter is greater than the outer diameter of the first core segment 21.In said structure, the bottom of the second core segment 22 blocks (second at valve port 13
The outer diameter of core segment 22 is greater than the latus rectum of valve port 13 to keep sealing), the outer diameter of the first core segment 21 does not influence to block valve port 13
Leakproofness, therefore the first core segment 21 outer diameter design it is more free.Moreover it is preferred that core component 20 is by the first core
Section 21 and the second core segment 22 form, and biggish second core segment 22 of outer diameter is adapted to attachment base chamber 121, therefore core component
20 can be mounted on from top to bottom on valve seat 10.
Preferably, as depicted in figs. 1 and 2, in example 1, inner hole, the company of being formed in inner hole are provided on attachment base 12
Joint chair chamber 121, inner hole are stepped hole, and stepped hole includes superposed receiving hole and the pilot hole positioned at lower part, pilot hole
Inner wall be adapted to the outer wall of the second core segment 22 so that core component 20 can be moved along predetermined direction.The cascaded surface of stepped hole
On be provided with upper baffle ring 150 and lower baffle ring 160, sealing structure 170 is folded between upper baffle ring 150 and lower baffle ring 160.Support frame
70 are supported on the cascaded surface of stepped hole by baffle ring.
In example 1, the bottom that the movement of core component 20 lower position-arresting point can be core component 20 is abutted with valve port 13
When (fully closed structure), be also possible to (non-fully closed structure) when the lower surface of protrusion 42 is abutted with the upper surface of upper baffle ring 150.Core
When body component 20 moves upper position-arresting point and can be the upper surface of protrusion 42 and abut with the first roof being open of support frame 70,
The joint face 23 of the first core segment 21 and the connection of the second core segment 22 be can be when abutting with the lower surface of lower baffle ring 160.
As shown in Figure 1, in example 1, electric expansion valve further includes shell 60, it is located at the top of valve seat 10, rotor
51, the settings such as screw rod 30, support frame 70 are additionally provided with the bracket 90 positioned at cover top portion, locating shaft 200 inside the shell, in shell
First end insertion bracket 90 in, the second segment of locating shaft 200 is inserted into screw rod 30, above structure on the one hand being capable of positioning filament
On the other hand the structures such as bar 30, rotor 51 can also prevent the upward play of screw rod 30.
As shown in Figure 6 and Figure 7, the electric expansion valve of embodiment two and the difference of the electric expansion valve of embodiment one are,
The setting position of elastic component and the structure of support frame 70, specifically, as shown in fig. 6, in example 2, the upper surface of nut
The second elastic component 180 is provided between rotor 51 to support rotor 51.Specifically, the second elastic component 180 is spring, spring pocket
It is located on screw rod 30, rotor 51 is supported in one end of spring, and the other end of spring is supported on the upper surface of nut 40.Spring, which is given, to be turned
Son 51 apply it is upward support power to support rotor 51, prevent rotor 51 from moving down along its axis.Since rotor 51 is not with spiral shell
Mother 40 moves down, so that the relative displacement between rotor 51 and coil 52 greatly reduces, guarantees that rotor 51 can reach
Maximum (top) speed it is constant (maximum driving force is constant).Therefore guarantee driving force without going through the volume for increasing coil, to reduce
Small product size, reduces production cost.
As shown in Figure 6 and Figure 7, in example 2, support frame 70 is annular in shape, and support frame 70 includes peripheral wall, support frame 70
Peripheral wall be fixedly connected with attachment base 12, peripheral wall is equipped with the second opening, and nut 40 is provided with the second convex block for protruding into the second opening,
Second opening forms mating groove 72, and the second convex block forms protrusion 42.When nut 40 has the trend of rotation, protrusion 42
Side wall can be abutted with the cell wall of mating groove 72 to prevent nut 40 from rotating.Above structure is simple, easy to process.
As shown in Figure 8 and Figure 9, the electric expansion valve of embodiment three and the difference of the electric expansion valve of embodiment two are,
The specific structure of support frame 70.Specifically, in the third embodiment, support frame 70 is cylindrical in shape, the side wall and valve seat 10 of support frame 70
It is fixedly connected, the inner hole of support frame 70 includes limiting hole section 71 and the guiding hole section 73 positioned at 71 lower section of limit hole section, cooperation
Slot 72 is set to limit hole section 71, and the internal diameter of guiding hole section 73 is adapted with the outer diameter of core component 20, and nut 40, which is provided with, to be stretched
Enter the third convex block of mating groove 72, third convex block forms protrusion 42.When nut 40 has the trend of rotation, third convex block
Side wall can be abutted with the cell wall of mating groove 72 to prevent nut 40 from rotating.Above structure is simple, easy to process.And above structure branch
Attachment base 12 in 70 alternate embodiments one of support, therefore installation steps can be reduced, reduce production cost.
As shown in figure 8, in the third embodiment, the bottom of the top braces rotor 51 of support frame 70, so that the weight of rotor 51
Power is supported frame 70 and undertakes.
As shown in Figure 10, the electric expansion valve of example IV and the difference of the electric expansion valve of embodiment one are, electronics
Expansion valve further includes deceleration mechanism 190.Specifically, rotor 51 is connect with the input terminal of deceleration mechanism 190, screw rod 30 and speed reducer
The output end of structure 190 connects, and above structure makes the precision of electric expansion valve more accurate, improves the performance of electric expansion valve.
Lower mask body introduces the course of work of electric expansion valve, wherein as shown in figure 3, D1 is the first core segment 21
Outer diameter, D2 is the latus rectum D2 of valve port 13, and D3 is the outer diameter of the second core segment 22, and D4 is the internal diameter of core component 20, SD1 the
The sectional area of one core segment 21, SD2 are the area of valve port 13, and SD3 is the area of the second core segment 22, and SD4 is core component 20
Inner hole sectional area:
When from the transverse tube that second interface 15 is connected into pressure:
(1) when core component 20 is located at detent position: 10 inside stress balance of valve seat, transverse tube pressure act on core group
Part 20, core component 20 are acted on forming upward difference force F1 by difference in areas (SD3-SD2) and pressure P, and by difference in areas (SD3-
SD1 it) acts on forming downward difference force F2 with pressure P；F1-F2 is the resultant force that core component 20 is subject to.Wherein, F1-F2=(SD3-
SD2) * P- (SD3-SD1) * P=(SD3-SD2-SD3+SD1) * P=(SD1-SD2) * P.Therefore in order to reduce core component 20 by
The difference of the cross-sectional area SD1 of power, the cross-sectional area SD2 of valve port 13 and the first core segment 21 is less than or equal to 40mm2.That is, SD2-SD1
≈ 0, therefore it is intended to zero described in core component 20 with joint efforts up and down, therefore to driving force demand pole when 20 breakdown action of core component
It is small, it is not necessary to increase the volume of coil 52, reduce production cost.
(2) when core component 20 is located at open position (position of the core component 20 far from valve port 13): inside valve seat 10
Each position pressure of the internal cavity of cavity, 60 internal cavity of shell and core component 20 is relatively close to, the effect of transverse tube pressure
In core component 20, core component 20 is acted on forming upward difference force F3, core component by difference in areas (SD3-SD4) and pressure P
20 also by the first core segment 21 and the second core segment 22 joint face 23 difference in areas (SD3-SD1) and pressure chamber P act on to be formed to
Lower difference force F4 and 20 top surface product moment (SD1-SD4) of core component and pressure P act on forming downward difference force F5.F3-
(F4+F5) resultant force being subject to for core component 20.Wherein, F3- (F4+F5)={ (SD3-SD4)-[(SD3-SD1)+(SD1-
SD4)] } * P=(SD3-SD4-SD3+SD1-SD1+SD4) * P=0*P=0.Since the difference in areas of bearing up-down force is zero, valve seat 10
Internal stress balance, therefore demand of the core component 20 in unlatching, closing motion to driving force is smaller, it is not necessary to increase coil 52
Volume, reduce production cost.
When from the vertical tube that first interface 14 is connected into pressure:
(1) when core component 20 is located at detent position: 10 inside stress balance of valve seat, standpipe pressure effect and core group
Part 20, core component 20 are acted on forming upward difference force F6 by difference in areas (SD2-SD4) and pressure P.By difference in areas (SD1-SD4)
It acts on forming downward difference force F7 with pressure P.SD2-SD1 ≈ 0, therefore resultant force (F6-F7) tends to up and down described in core component 20
It is minimum to driving force demand when zero, breakdown action, it is not necessary to increase the volume of coil 52, reduce production cost.
(2) when core component 20 is located at open position: 10 internal cavity of valve seat, 60 internal cavity of shell and core group
Each position pressure of the internal cavity of part 20 is relatively close to, and standpipe pressure acts on core component 20, and core component 20 is by area
Poor (SD3-SD4) and pressure P act on forming upward difference force F8.By the joint face 23 of the first core segment 21 and the second core segment 22
Difference in areas (SD3-SD1) and pressure P act on forming 20 top surface product moment (SD1- of downward difference force F9 and core component
SD4 it) acts on forming downward difference force F10 with pressure P.F8- (F9+F10) is the resultant force that core component 20 is subject to.Wherein,
{ (SD3-SD4)-[(SD3-SD1)+(SD1-SD4)] } * P=(SD3-SD4-SD3+SD1-SD1+SD4) * P=0*P=0.Due to
The difference in areas of bearing up-down force is zero, 10 inside stress balance of valve seat, thus core component 20 open, closing motion when to driving
The demand of power is smaller, it is not necessary to increase the volume of coil 52, reduce production cost.
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 (12)
1. a kind of electric expansion valve characterized by comprising
Valve seat (10), the valve seat (10) have valve support chamber (4) and valve port (13)；
Core component (20), the core component (20) are at least partly movably arranged at the valve support chamber (4)；
Screw rod (30) and nut (40), the screw rod (30) passes through with the nut (40) to be threadedly engaged, the nut (40)
It is fixedly connected with the core component (20)；
Support frame (70), support frame as described above (70) are directly or indirectly fixedly connected with the valve seat (10), support frame as described above (70)
Equipped with mating groove (72), the nut (40) is equipped with protrusion (42), and the protrusion (42) and the mating groove (72) match
It closes；
Driving mechanism (50), including rotor (51) and coil (52), the rotor (51) are fixedly connected with the screw rod (30),
The rotor (51) drives the screw rod (30) rotation by the coil (52), by being threadedly engaged with the screw rod (30)
Effect and the mating reaction with the mating groove (72), the nut (40) can in axial direction move and without circumferential direction
Rotation, the core component (20) can be close to or away from the valve port (13) by the drive of the nut (40).
2. electric expansion valve according to claim 1, which is characterized in that the valve seat (10) include valve seat body (11) with
And attachment base (12), the attachment base (12) are fixedly connected with the valve seat body (11), the valve port (13) is set to described
Valve seat body (11), the attachment base (12) have attachment base chamber (121), and core component (20) press-fitting is packed into the connection
Seat chamber (121), support frame as described above (70) are fixedly connected by the attachment base (12) with the valve seat body (11).
3. electric expansion valve according to claim 1, which is characterized in that the nut (40) includes nut body portion (41)
And the nut body portion on the side wall of the nut body portion (41) and the outwardly extending protrusion (42) is set
(41) threaded hole is provided on, the screw rod (30) is arranged in the threaded hole.
4. electric expansion valve according to claim 2, which is characterized in that support frame as described above (70) is cup-shaped, the support
Frame (70) includes side wall, and the side wall of support frame as described above (70) is fixedly connected with the attachment base (12), the screw rod (30)
The inner cavity of support frame as described above (70), at least part position of the nut (40) are penetrated along the axis direction of support frame as described above (70)
In the inner cavity, the side wall is provided with the first opening, and the nut (40), which is provided with, protrudes into the first convex of first opening
Block, first opening are formed the mating groove (72), and first convex block forms the protrusion (42).
5. electric expansion valve according to claim 4, which is characterized in that support frame as described above (70) further includes roof, described
Screw rod (30) is arranged in the roof and protrudes into the inner cavity, is provided between the upper surface and the roof of the nut (40)
First elastic component (110).
6. electric expansion valve according to claim 1, which is characterized in that the upper surface of the nut (40) and the rotor
(51) the second elastic component (180) is provided between to support the rotor (51).
7. electric expansion valve according to claim 2, which is characterized in that support frame as described above (70) annularly, the support
Frame (70) includes peripheral wall, and the peripheral wall of support frame as described above (70) is fixedly connected with the attachment base (12), and the peripheral wall is equipped with
Second opening, the nut (40) are provided with the second convex block for protruding into second opening, match described in the second opening formation
It closes slot (72), second convex block forms the protrusion (42).
8. electric expansion valve according to claim 1, which is characterized in that support frame as described above (70) is cylindrical in shape, the support
The side wall of frame (70) is fixedly connected with the valve seat (10), and the inner hole of support frame as described above (70) includes limit hole section (71) and position
Guiding hole section (73) below limit hole section (71), the mating groove (72) are set to the limit hole section (71), institute
The internal diameter for stating guiding hole section (73) is adapted with the outer diameter of the core component (20), described in the nut (40) is provided with and protrudes into
The third convex block of mating groove (72), the third convex block form the protrusion (42).
9. electric expansion valve according to claim 2, which is characterized in that be provided on the valve seat (10) spaced
First interface (14) and second interface (15), the first interface (14) are connected to the valve port (13), the core component
(20) it is internally provided with the cavity (1) being connected to the valve port (13), between the core component (20) and the valve seat (10)
It is tightly connected.
10. electric expansion valve according to claim 9, which is characterized in that the core component (20) includes the first core
The cavity wall of section (21) and the second core segment (22), the outer diameter of second core segment (22) and the attachment base chamber (121) is suitable
Match, electric expansion valve further includes the sealing structure being arranged between the attachment base (12) and first core segment (21)
(170), to seal the gap between the attachment base (12) and first core segment (21).
11. electric expansion valve according to claim 10, which is characterized in that the cross-sectional area of first core segment (21)
It is set as SD1, the cross-sectional area of the valve port (13) is set as SD2, need to meet following relationship: (SD2-SD1)≤40mm2。
12. electric expansion valve according to claim 1, which is characterized in that the electric expansion valve further include:
Deceleration mechanism (190), the rotor (51) connect with the input terminal of the deceleration mechanism (190), the screw rod (30) with
The output end of the deceleration mechanism (190) connects.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247873.0A CN110296267B (en) | 2018-03-23 | 2018-03-23 | Electronic expansion valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247873.0A CN110296267B (en) | 2018-03-23 | 2018-03-23 | Electronic expansion valve |
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| CN110296267A true CN110296267A (en) | 2019-10-01 |
| CN110296267B CN110296267B (en) | 2021-02-26 |
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|---|---|---|---|
| CN201810247873.0A Active CN110296267B (en) | 2018-03-23 | 2018-03-23 | Electronic expansion valve |
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| Country | Link |
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| CN (1) | CN110296267B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113039399A (en) * | 2018-12-20 | 2021-06-25 | 丹佛斯有限公司 | Electric expansion valve |
| CN115218563A (en) * | 2021-04-15 | 2022-10-21 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230068306A (en) | 2021-11-10 | 2023-05-17 | 에이에스엠 아이피 홀딩 비.브이. | System and apparatus for a valve assembly |
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| Publication number | Publication date |
|---|---|
| CN110296267B (en) | 2021-02-26 |
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