CN110296259A - Electric expansion valve and refrigeration system with it - Google Patents
Electric expansion valve and refrigeration system with it Download PDFInfo
- Publication number
- CN110296259A CN110296259A CN201810246493.5A CN201810246493A CN110296259A CN 110296259 A CN110296259 A CN 110296259A CN 201810246493 A CN201810246493 A CN 201810246493A CN 110296259 A CN110296259 A CN 110296259A
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- China
- Prior art keywords
- valve
- core component
- section
- electric expansion
- expansion valve
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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
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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
- F16K31/02—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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The present invention provides a kind of electric expansion valve and with its refrigeration system, wherein electric expansion valve includes: valve seat, has valve chamber and valve port；Screw rod and nut；Core component, core component are fixedly connected with nut, and core component is equipped with sealing element；Driving mechanism, including rotor and coil, rotor are connect with screw rod, and core component can be close to or away from valve port by the drive of nut；Retaining ring is equipped between valve seat and core component, retaining ring has complete portion and notch section, and sealing element can be matched with complete portion or notch section；Shell is fixedly connected with valve seat, and shell has rotor chamber, when sealing element and complete portion cooperate, rotor chamber is not connected to mutually with valve chamber by the sealing function of sealing element, when being moved on sealing element with notch section cooperation, there is gap, rotor chamber is connected to by gap with valve chamber between sealing element and notch section.Apply the technical scheme of the present invention the problem of capable of efficiently solving electric expansion valve high production cost in the prior art.
Description
Technical field
The present invention relates to refrigeration control technical fields, in particular to a kind of electric expansion valve and with its refrigeration
System.
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, and realize that the driving force of open and close valve is formed by coil drive rotor,
Establish rules the rotor and coil of lattice, the driving force exported be it is constant, with the increase of valve port bore, valve after the upgrading of system refrigerant
The pressure that internal portion is formed is larger, and driving force demand needed for product is larger when switching from closed valve state to valve opening state, and one
Driving force needed for aspect influences valve opening smoothness another aspect product needs to realize promotion by modes such as amplification coils, cause into
This rising.
Summary of the invention
The main purpose of the present invention is to provide a kind of electric expansion valve and with its refrigeration system, valve body can reduce
Inside is formed by difference force to reduce driving force needed for product, reduces cost of goods manufactured.
To achieve the goals above, the present invention provides a kind of electric expansion valves, comprising: valve seat, have valve chamber and with
The valve port of valve chamber connection；Screw rod and nut, screw rod are matched with nut by screw thread；Core component, core component and nut
It is fixedly connected, core component is at least partly movably disposed at valve chamber, and core component is equipped with sealing element；Driving mechanism, packet
Rotor and coil are included, rotor is connect with screw rod, and rotor is rotated by coil drive screw rod, and nut is matched by the screw thread with screw rod
With in axial direction moving, core component can be close to or away from valve port by the drive of nut for cooperation；Valve seat and core component it
Between be equipped with retaining ring, at least partly the core component inner cavity of protruding into retaining ring, retaining ring has complete portion and a notch section, intact position in
The lower section of notch section, sealing element can be matched with complete portion or notch section；Shell is fixedly connected with valve seat, and shell, which has, to be turned
Sub- chamber, retaining ring are fixedly installed on valve seat, and when sealing element and the cooperation of complete portion, rotor chamber and valve chamber are made by the sealing of sealing element
With not being connected to mutually, when being moved on sealing element with notch section cooperation, there is gap, rotor chamber passes through between sealing element and notch section
Gap is connected to valve chamber.
The present invention also provides a kind of refrigeration systems, comprising: electric expansion valve, electric expansion valve are above-mentioned electronic expansion
Valve.
It applies the technical scheme of the present invention, it is cold when electric expansion valve, which is in closed valve state, that is, core component, abuts valve port
When matchmaker enters from valve port, the chamber pressure of valve inner is larger, and refrigerant may make core component that can not support because having little time pressure release
Valve port is caught, by the sealing mating reaction in the complete portion of sealing element and retaining ring, the pressure where valve chamber and rotor chamber is able to maintain
Balance is so that electric expansion valve keeps closed valve state, and is relatively distant from valve when electric expansion valve is in valve opening state, that is, core component
Mouthful when, refrigerant enters that rotor chamber is very fast into pressure, pressure release is slower from valve port, and pressure accumulation easy to form passes through sealing element and retaining ring
Notch section mating reaction, refrigerant gradually released by the outflow of gap between sealing element and the notch section of retaining ring, pressure
It puts, therefore either valve opening or when closed valve state, it is relatively small that valve inner is formed by difference force, is needing valve opening or valve closing
When it is smaller to driving force needed for coil, without realizing by increasing the modes such as coil, reduce manufacturing 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, wherein in Fig. 1
Core component be in closed valve state；
Fig. 2 shows the enlarged structure schematic diagrams at the A of the electric expansion valve of Fig. 1；
Fig. 3 shows the schematic perspective view of the retaining ring of the electric expansion valve of Fig. 1；
Fig. 4 shows the vertical profile structural schematic diagram of the retaining ring of Fig. 3；
Fig. 5 shows the vertical profile structural schematic diagram of electric expansion valve, wherein the core component in Fig. 5 is in valve opening state；
Fig. 6 shows the enlarged structure schematic diagram at the B of the electric expansion valve of Fig. 5；
Fig. 7 shows the vertical profile structural schematic diagram of the core component of the electric expansion valve of Fig. 1；
Fig. 8 shows the broken section structural schematic diagram of the electric expansion valve of Fig. 1, wherein Fig. 8 show dimension D 1, D2,
D3 and D4；
Fig. 9 shows the vertical profile structural schematic diagram of the embodiment two of electric expansion valve according to the present invention, wherein in Fig. 9
Core component be in closed valve state；
Figure 10 shows the enlarged structure schematic diagram at the C of the electric expansion valve of Fig. 9；
Figure 11 shows the schematic perspective view of the retaining ring of the electric expansion valve of Fig. 9；
Figure 12 shows the vertical profile structural schematic diagram of the retaining ring of Figure 11；
Figure 13 shows the vertical profile structural schematic diagram of electric expansion valve, wherein the core component in Figure 13 is in valve opening shape
State；And
Figure 14 shows the enlarged structure schematic diagram at the D of the electric expansion valve of Figure 13.
Wherein, the above drawings include the following reference numerals:
1, valve chamber；2, rotor chamber；4, it is connected to chamber；10, valve seat；11, valve seat body；12, attachment base；121, mounting hole；
122, notch section；123, complete portion；13, valve port；14, first interface；15, second interface；20, core component；21, the first core
Section；211, annular groove；22, the second core segment；25, second step face；30, screw rod；40, nut；41, protrusion；50, it drives
Mechanism；51, rotor；52, coil；60, shell；70, sealing element；80, supporting element；81, limiting slot；120, retaining ring；150, it is open；
160, First terrace.
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 7, the electric expansion valve of embodiment one includes valve seat 10, screw rod 30 and nut 40, core group
Part 20, driving mechanism 50, retaining ring 120 and shell 60.Wherein, the valve port that valve seat 10 has valve chamber 1 and is connected to valve chamber 1
13.Screw rod 30 is matched with nut 40 by screw thread.Core component 20 is fixedly connected with nut 40, at least portion of core component 20
Divide and be movably disposed at valve chamber 1, core component 20 is equipped with sealing element 70.Driving mechanism 50 includes rotor 51 and coil 52,
Rotor 51 is connect with screw rod 30, and rotor 51 drives screw rod 30 to rotate by coil 52, and nut 40 with the screw thread of screw rod 30 by matching
With in axial direction moving, core component 20 can be close to or away from valve port 13 by the drive of nut 40 for cooperation.Retaining ring 120 is arranged
Between valve seat 10 and core component 20, at least partly the inner cavity of protruding into retaining ring 120 of core component 20, retaining ring 120 have complete
Portion 123 and notch section 122, the lower section for the notch section 122 that complete portion 123 is located at, sealing element 70 can be with complete portion 123 or notches
Portion 122 matches.Shell 60 is fixedly connected with valve seat 10, and shell 60 has rotor chamber 2, and retaining ring 120 is fixedly installed on valve seat 10,
When sealing element 70 and complete portion 123 cooperate, rotor chamber 2 is not connected to mutually with valve chamber 1 by the sealing function of sealing element 70, when close
When moved on sealing 70 with the cooperation of notch section 122, there is gap, rotor chamber 2 passes through gap between sealing element 70 and notch section 122
It is connected to valve chamber 1.
It applies the technical scheme of the present invention, abuts valve port 13 when electric expansion valve is in closed valve state, that is, core component 20
When, when refrigerant enters from valve port 13, the chamber pressure of valve inner is larger, and refrigerant may make core component because having little time pressure release
20 can not abut valve port 13, by the sealing mating reaction of sealing element 70 and the complete portion of retaining ring 120, valve chamber 1 and rotor chamber 2
The pressure at place is able to maintain balance so that electric expansion valve keeps closed valve state, and works as electric expansion valve and be in valve opening state, that is, core
When body component 20 is relatively distant from valve port 13, refrigerant is from valve port 13 is very fast into rotor chamber 2 into pressure, pressure release is slower, pressure easy to form
Power accumulation, by the mating reaction of sealing element 70 and the notch section of retaining ring 120, refrigerant is scarce by sealing element 70 and retaining ring 120
Gap outflow between oral area, pressure is gradually released, therefore either valve opening or when closed valve state, valve inner institute shape
At difference force it is relatively small, it is smaller to driving force needed for coil when needing valve opening or valve closing, without by increasing the side such as coil
Formula is realized, manufacturing cost is reduced.
It should be noted that when " complete portion " and sealing element 70 cooperate, the portion of sealing element 70 and complete portion engaged therewith
/ seamless, so that valve chamber 1 and rotor chamber 2 can not pass through above-mentioned gap area.The shape in above-mentioned " complete portion " is not
It limits (such as cylinder, square column etc.), as long as guaranteeing seamless between sealing element 70 and the part in complete portion engaged therewith.
When " notch section " and sealing element cooperate, there is gap between sealing element 70 and the part in complete portion engaged therewith, so that
Valve chamber 1 and rotor chamber 2 can pass through above-mentioned gap area.Unlimited (such as the polygon column, or not of the shape of above-mentioned " notch section "
Regular shape), as long as guaranteeing that there is gap between sealing element 70 and the part of " notch section " engaged therewith.
It should also be noted that, notch section and sealing element 70 cooperate, wherein the meaning that " cooperation " is referred to might not table
It is shown as being engaged, is also possible to that notch section and sealing element 70 are corresponding (not contacting), the outer wall of notch section is interior with sealing element 70
There is gap between portion.
In example 1, due to needing to form gap in retaining ring 120 and core component 20, as long as changing retaining ring
120 or one shape in 20 the two of core component and structure can form gap.Preferably, in example 1, to gear
The structure of circle 120 improves, so that retaining ring 120 includes complete portion and notch section, and to the shape of core component 20 and valve seat 10
Shape is not made an amendment.It greatly reduces and is produced into increase versatility therefore, it is not necessary to design new core component and valve seat
This.
As shown in Figures 1 to 6, in example 1, retaining ring 120 includes first section and positioned at first section top
Second section, the inner surface of second section gradually expand from the bottom to top, and first section forms complete portion, and second section forms notch
Portion.When core component 20 is in closed valve state, sealing element 70 contacts sealing with the inner surface of first section, when core component 20
When in valve opening state, there is distance between sealing element 70 and the inner surface of second section.Specifically, when core component 20 is by closing
When valve state switches to valve opening state, sealing element 70 is gradually moved into second section.Since the inner surface of second section is under
It is supreme to gradually expand (internal diameter is gradually increased from the bottom to top), therefore as sealing element 70 gradually moves (sealing into second section
The outer diameter of part 70 is constant), the outer surface of sealing element 70 and the distance between the inner surface of second section become larger, so that
Fluid can enter rotor chamber 2 by the gap between the outer surface of sealing element 70 and the inner surface of second section.Above structure
Simply, easy to process.
As shown in Figure 1, Figure 2, shown in Fig. 5 and Fig. 6, in example 1, the inner wall of valve seat 10 has First terrace 160, gear
Circle 120 is fixed on First terrace 160, and the outer wall of core component 20 has a second step face 25, and second step face 25 is lower than the
One step surface 160, second step face 25 can be contacted with First terrace 160.When second step face 25 and first step
When face 160 contacts, core component 20 is located at upper position-arresting point.Above structure is simple, it is easy to accomplish.
As shown in Figures 1 to 6, in example 1, valve seat 10 including valve seat body 11 and is fixed on valve seat body 11
Attachment base 12, the inside of attachment base 12 and valve seat body 11 forms valve chamber 1, and valve port 13 is set to valve seat body 11, attachment base
Mounting hole 121 is provided on 12, mounting hole 121 includes construction section and aperture is greater than construction section and is located at leading below construction section
To section, the outer wall and guide section of core component 20 cooperate, and the joint face of construction section and guide section forms First terrace 160.On
It is simple to state structure, it is easy to process.In addition, guide section can play guiding role to core component 20, so that core component
20 can move along predetermined direction.
As shown in Figures 1 to 6, in example 1, core component 20 including the first core segment 21 and is located at the first core
The joint face of second core segment 22 of 21 lower section of section, the first core segment 21 and the second core segment 22 forms second step face 25, close
Sealing 70 is set on the outer wall of the first core segment 21.Above structure is simple, easy to process.
As shown in Figure 1, Figure 2, shown in Fig. 5 to Fig. 7, in example 1, sealing element 70 is sealing ring, is set in the first core segment 21
It is equipped with the annular groove 211 for accommodating sealing ring.Above structure is simple, easy to process, is easily installed.In addition, sealing ring is upper and lower
Surface can be attached on the upper cell wall and lower cell wall of annular groove 211, so that sealing area increases, leakproofness is improved.
As shown in figure 8, in example 1, core component 20 includes the first core segment 21 and is located under the first core segment 21
Second core segment 22 of side, the cross-sectional area of the first core segment 21 are set as SD1, and the cross-sectional area of valve port 13 is set as SD2, need
Meet following relationship: (SD2-SD1)≤40mm2.Specifically, in example 1, core component 20 includes solid with nut 40
Surely the outer diameter of the first core segment 21 for connecting and the second core segment 22 for being plugged in valve port 13, the second core segment 22 is greater than first
For the outer diameter of core segment 21 to form second step face 25, the outer diameter of the second core segment 22 is greater than the latus rectum of valve port 13 so that core group
Part 20 can block valve port 13.The outer diameter of first core segment 21 is D1, and the latus rectum of valve port 13 is D2, the outer diameter of the second core segment 22
For D3, the internal diameter of core component 20 is D4.When the transverse tube connected from second interface 15 is into pressure, and when core component 20 is located at closing
When position, 10 inside stress balance of valve seat, transverse tube pressure acts on core component 20, and core component 20 is by difference in areas (SD3-
SD2 it) acts on forming upward difference force F1 with pressure P, and is acted on forming downward pressure difference by difference in areas (SD3-SD1) and pressure P
Power F2；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 20 stress of core component, the outer diameter D 1 of the first core segment 21 with
The absolute value of difference between the latus rectum D2 of valve port 13 is less than or equal to 1mm, that is, D1 ≈ D2, therefore described in core component 20 up and down
Resultant force is intended to zero, therefore minimum to driving force demand when 20 breakdown action of core component, it is not necessary to increase the volume of coil 52, reduce
Production cost.
Preferably, in the present embodiment, stepped hole includes biggish first hole section of internal diameter and is located at below the first hole section
The second hole section, the outer diameter of the second core segment 22 less than the second hole section outer diameter so that can when installation core component 20
Positive installation from top to bottom, it is not necessary to which valve seat core is set, to reduce installation step.
As shown in Figures 1 to 6, in example 1, there is connection chamber 4, nut 40 is located at connection chamber 4 in core component 20
It is interior and be fixed on core component 20, it was provided with flow structure between nut 40 and core component 20, so that connection chamber 4 and rotor
Chamber 2 passed through flow structure and was interconnected.Above structure to be in closed valve state when core component 20, and refrigerant is flowed from valve port 13
When entering to be connected to chamber 4, refrigerant can continue to enter in rotor chamber 2 by crossing flow structure so that the pressure for being connected to chamber 4 and rotor chamber 2 is flat
Weighing apparatus, so that downward resistance suffered by nut 40 reduces when core component 20 moves up, it is final to realize core group
Part 20 opens more smoothly purpose.
In example 1, flowing hole is provided on nut 40, flowing hole forms above-mentioned flow structure excessively.Above structure letter
It is single, it is easy to process.
As shown in Figures 1 to 6, in example 1, electric expansion valve further includes supporting element 80, and supporting element 80 is fixedly installed
In being provided with limiting slot 81 on valve seat 10, supporting element 80, protrusion 41 is provided on nut 40, protrusion 41 stretches to limiting slot
Cooperate in 81 and with limiting slot 81.Specifically, when having the tendency that rotating along its axis under transmission of the nut 40 in screw rod 30, limit
Position slot 81 can backstop protrusion 41 so that nut 40 cannot be rotated along its axis, and can be moved up and down (i.e. along its axis
It is only capable of moving up and down along its axis).
As shown in Figures 1 to 6, in example 1, supporting element 80 is cup-shaped, and the bottom of supporting element 80 is provided with prolongs upwards
The opening stretched, opening form limiting slot 81.Above structure is simple, it is easy to accomplish, and it is at low cost.
Preferably, when the upper surface of protrusion 41 is abutted with the top surface of limiting slot 81, core component 20 is located at upper position-arresting
Point.It should be noted that the upper surface that the limitation of upper position-arresting point can be protrusion 41 abuts to be formed with the top surface of limiting slot 81
, it is also possible to second step face 25 and abuts formation with First terrace 160.It can also be that above two form is collectively formed
's.
As shown in Fig. 9 to Figure 14, the difference of the electric expansion valve and the electric expansion valve of embodiment one of embodiment two is
The specific structure of retaining ring 120.Specifically, as shown in Fig. 9 to Figure 12, in example 2, the top of retaining ring 120 is provided with downwards
The cylinder section of the opening 150 of extension, the retaining ring 120 where opening 150 forms notch section 122, remaining section part shape of retaining ring 120
At complete portion 123.When core component 20 is in closed valve state, the inner surface of the retaining ring 120 of 150 lower section of sealing element 70 and opening
Contact sealing, when core component 20 is in valve opening state, sealing element 70 is corresponding with opening 150, so that valve chamber 1 and rotor chamber 2
150 connection of opening can be passed through.Specifically, when core component 20 from closed valve state to valve opening state switch when, sealing element 70 by
Gradually move up.When the lower surface of sealing element 70 is higher than the bottom surface of opening 150, fluid can enter rotor by opening 150
In chamber 2, so that valve chamber 1 and rotor chamber 2 can be rapidly reached pressure equilibrium.Above structure is simple, easy to process.
Lower mask body introduces the course of work of electric expansion valve, wherein as shown in figure 8, 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:
(1) core component is in closed valve state, and transverse tube is into when pressing:
Sealing element 70 can (circumference be close with the sealing in sealing contact with the first flow channels 3 of realization of the inner surface of retaining ring 120
Envelope), valve chamber 1 is isolated with sealed about 70 part of rotor chamber 2, rotor chamber 2 be connected to chamber 4 up and down；Valve chamber 1 be connected to chamber 4
Abutting through core component and valve port 13 and realize seal isolation.The pressure action of refrigerant is in core component 20, core in transverse tube
Component 20 is acted on forming upward difference force by difference in areas (SD3-SD2) and pressure P；Core component 20 is also by difference in areas (SD3-
SD1 it) acts on forming downward difference force with pressure P.In order to enable being intended to zero with joint efforts up and down described in core component 20, in this implementation
Example in, by D1 be designed and sized to be approximately equal to D2.In this way, F=(SD3-SD2) * P- (SD3-SD1) * P=(SD3-SD2-SD3+
SD1) * P=(SD1-SD2) * P ≈ 0, therefore core component 20 is minimum to driving force demand when above structure makes breakdown action.
Preferably, in the present embodiment, (SD2-SD1)≤40mm2。
(2) core component is in valve opening state, and transverse tube is into when pressing:
Core component 20 moves up, and sealing element 70 and core component 20 form part and seal, and valve chamber 1 is with rotor chamber 2 through overstocked
Gap perforation between sealing 70 and notch section, pressure reach unanimity.Rotor chamber 2 be connected to chamber 4 up and down, pressure tends to one
It causes.Transverse tube pressure acts on core component 20, and core component 20 is acted on forming upward pressure by difference in areas (SD3-SD4) and pressure P
Poor power.It is acted on forming downward difference force+core by 25 difference in areas of second step face (SD3-SD1) and pressure P of core component 20
20 top surface product moment (SD1-SD4) of component and pressure P act on forming downward difference force；The difference in areas of bearing up-down force is zero, valve chamber
1, rotor chamber 2 and the connection each position pressure of chamber 4 reach unanimity.Therefore it is intended to zero with joint efforts up and down described in core component 20.It opens
Open, close core component movement when it is smaller to driving force demand.
(3) core component is in closed valve state, when from the vertical tube that first interface 14 is connected into pressure:
Sealing element 70 can be in sealing contact to realize sealing (circumferential sealing), valve chamber 1 and rotor with the inner surface in complete portion
Sealed about 70 part of chamber 2 isolation, rotor chamber 2 be connected to chamber 4 up and down；Valve chamber 1 be connected to chamber 4 through core component and valve port
13 abutting and realize seal isolation.Vertical tube pressure action in core component 20, core component 20 by difference in areas (SD2-SD4) with
Pressure P acts on forming upward difference force；It is acted on forming downward difference force by difference in areas (SD1-SD4) and pressure P；Due to D1 ≈
D2, therefore F=(SD2-SD4) * P- (SD1-SD4) * P=(SD2-SD4-SD1+SD4) * P=(SD2-SD1) * P ≈ 0, therefore core
It is intended to zero with joint efforts up and down described in body component 20；It is minimum to driving force demand when breakdown action.
(4) core component is in valve opening state, and vertical tube is into when pressing:
Core component 20 moves up, and sealing element 70 and core component 20 form part and seal, and valve chamber 1 is with rotor chamber 2 through overstocked
Gap perforation between sealing 70 and notch section avoids vertical tube into the pressure formed in journey rotor chamber 2 is pressed through and accumulates (pressure
Value is significantly greater than pressure values at valve port 13, and additionally generates downward difference force), pressure reaches unanimity.Rotor chamber 2 be connected to chamber
4 up and down, and pressure reaches unanimity.Vertical tube pressure action in core component 20, core component 20 by difference in areas (SD3-SD4) with
Pressure P acts on forming upward difference force；It is acted on by 25 difference in areas of second step face (SD3-SD1) and pressure P of core component 20
It forms downward 20 top surface product moment (SD1-SD4) of difference force+core component and pressure P acts on forming downward difference force.Up and down by
The difference in areas of power is zero [(SD3-SD4)-(SD3-SD1)-(SD1-SD4)]=0.Valve chamber 1, rotor chamber 2 and the connection each portion of chamber 4
Position pressure reaches unanimity.Therefore it is intended to zero with joint efforts up and down described in core component 20.To drive when opening, closing core component movement
Power demand is smaller.
Present invention also provides a kind of refrigeration system, the embodiment according to the refrigeration system of the application includes electronic expansion
Valve, electric expansion valve are above-mentioned electric expansion valve.It is at low cost since electric expansion valve has the action performance of core component good
The advantages of, therefore also had the above advantages with its electric expansion valve.
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
Valve seat (10), with valve chamber (1) and the valve port (13) being connected to the valve chamber (1)；
Screw rod (30) and nut (40), the screw rod (30) are matched with the nut (40) by screw thread；
Core component (20), the core component (20) are fixedly connected with nut (40), at least portion of the core component (20)
Divide and be movably disposed at the valve chamber (1), the core component (20) is equipped with sealing element (70)；
Driving mechanism (50), including rotor (51) and coil (52), the rotor (51) connect with the screw rod (30), described
Rotor (51) drives the screw rod (30) rotation by the coil (52), the nut (40) by with the screw rod (30)
The effect of being threadedly engaged in axial direction is moved, and the core component (20) can be close to or away from by the drive of the nut (40)
The valve port (13)；
Retaining ring (120) are equipped between the valve seat (10) and the core component (20), at least partly described core component (20)
The inner cavity of the retaining ring (120) is protruded into, the retaining ring (120) has complete portion (123) and notch section (122), the complete portion
(123) lower section for the notch section (122) being located at, the sealing element (70) can be with the complete portion (123) or the notch sections
(122) it matches；
Shell (60) is fixedly connected with the valve seat (10), and the shell (60) has rotor chamber (2), and the retaining ring (120) is solid
Surely the valve seat (10) are set to, when the sealing element (70) and the complete portion (123) cooperate, the rotor chamber (2) with
The valve chamber (1) is not connected to mutually by the sealing function of the sealing element (70), when moved on the sealing element (70) with it is described
When notch section (122) cooperates, there is gap between the sealing element (70) and the notch section (122), the rotor chamber (2) is logical
The gap is crossed to be connected to the valve chamber (1).
2. electric expansion valve according to claim 1, which is characterized in that the retaining ring (120) include first section and
Second section positioned at the first section top, the inner surface of second section gradually expand from the bottom to top, and described first
Cylinder section forms the complete portion (123), and second section forms the notch section (122).
3. electric expansion valve according to claim 1, which is characterized in that be provided at the top of the retaining ring (120) downwards
The cylinder section of the opening (150) of extension, the retaining ring (120) where the opening (150) forms the notch section (122), institute
Remaining the section part for stating retaining ring (120) forms the complete portion (123).
4. electric expansion valve according to claim 1 or 2, which is characterized in that the inner wall of the valve seat (10) has first
Step surface (160), the retaining ring (120) are fixed on the First terrace (160), and the outer wall of the core component (20) has
Second step face (25), the second step face (25) are lower than the First terrace (160), second step face (25) energy
It is enough to be contacted with the First terrace (160).
5. electric expansion valve according to claim 4, which is characterized in that the valve seat (10) include valve seat body (11) with
And it is fixed on the attachment base (12) of the valve seat body (11), the inside shape of the attachment base (12) and the valve seat body (11)
At the valve chamber (1), the valve port (13) is set to the valve seat body (11), is provided with mounting hole on the attachment base (12)
(121), the mounting hole (121) includes construction section and aperture is greater than the construction section and is located at leading below the construction section
To section, the outer wall and the guide section of the core component (20) cooperate, the joint face shape of the construction section and the guide section
At the First terrace (160).
6. electric expansion valve according to claim 4, which is characterized in that the core component (20) includes the first core segment
(21) and be located at first core segment (21) below the second core segment (22), first core segment (21) and described second
The joint face of core segment (22) forms the second step face (25), and the sealing element (70) is set to first core segment
(21) on outer wall.
7. electric expansion valve according to claim 6, which is characterized in that the sealing element (70) is sealing ring, described the
The annular groove (211) for accommodating the sealing ring is provided in one core segment (21).
8. electric expansion valve according to claim 1, which is characterized in that the core component (20) includes the first core segment
(21) and be located at first core segment (21) below the second core segment (22), 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。
9. electric expansion valve according to claim 1, which is characterized in that the electric expansion valve further include:
Supporting element (80) is fixedly installed on the valve seat (10), is provided with limiting slot (81), the spiral shell on the supporting element (80)
Be provided with protrusion (41) on female (40), the protrusion (41) stretch in the limiting slot (81) and with the limiting slot
(81) cooperate.
10. electric expansion valve according to claim 9, which is characterized in that the supporting element (80) is cup-shaped, the support
The bottom of part (80) is provided with the opening upwardly extended, and the opening forms the limiting slot (81).
11. a kind of refrigeration system, comprising: electric expansion valve, which is characterized in that the electric expansion valve is claims 1 to 10
Any one of described in electric expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246493.5A CN110296259B (en) | 2018-03-23 | 2018-03-23 | Electronic expansion valve and refrigeration system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246493.5A CN110296259B (en) | 2018-03-23 | 2018-03-23 | Electronic expansion valve and refrigeration system with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110296259A true CN110296259A (en) | 2019-10-01 |
| CN110296259B CN110296259B (en) | 2021-02-26 |
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ID=68026055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810246493.5A Active CN110296259B (en) | 2018-03-23 | 2018-03-23 | Electronic expansion valve and refrigeration system with same |
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| Country | Link |
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| CN (1) | CN110296259B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3742722A (en) * | 1972-02-08 | 1973-07-03 | Spartan Valve Co | Thermostatic expansion valve for refrigeration systems |
| JPH0926235A (en) * | 1995-07-12 | 1997-01-28 | Fuji Koki:Kk | Expansion valve |
| CN202972081U (en) * | 2012-11-01 | 2013-06-05 | 卓旦春 | Self-operated differential pressure balance valve |
| CN104180567A (en) * | 2013-05-22 | 2014-12-03 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN104791497A (en) * | 2014-01-20 | 2015-07-22 | 浙江三花股份有限公司 | Direct acting electric valve |
| CN104791502A (en) * | 2014-01-20 | 2015-07-22 | 浙江三花股份有限公司 | Electric valve |
| CN206268472U (en) * | 2016-10-21 | 2017-06-20 | 浙江盾安机械有限公司 | A kind of electric expansion valve |
| CN107655241A (en) * | 2016-07-26 | 2018-02-02 | 浙江盾安禾田金属有限公司 | A kind of pilot-operated type electric expansion valve |
-
2018
- 2018-03-23 CN CN201810246493.5A patent/CN110296259B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3742722A (en) * | 1972-02-08 | 1973-07-03 | Spartan Valve Co | Thermostatic expansion valve for refrigeration systems |
| JPH0926235A (en) * | 1995-07-12 | 1997-01-28 | Fuji Koki:Kk | Expansion valve |
| CN202972081U (en) * | 2012-11-01 | 2013-06-05 | 卓旦春 | Self-operated differential pressure balance valve |
| CN104180567A (en) * | 2013-05-22 | 2014-12-03 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN104791497A (en) * | 2014-01-20 | 2015-07-22 | 浙江三花股份有限公司 | Direct acting electric valve |
| CN104791502A (en) * | 2014-01-20 | 2015-07-22 | 浙江三花股份有限公司 | Electric valve |
| CN107655241A (en) * | 2016-07-26 | 2018-02-02 | 浙江盾安禾田金属有限公司 | A kind of pilot-operated type electric expansion valve |
| CN206268472U (en) * | 2016-10-21 | 2017-06-20 | 浙江盾安机械有限公司 | A kind of electric expansion valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110296259B (en) | 2021-02-26 |
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