CN104457049B - A kind of Bidirectional expansion valve and its flow control methods - Google Patents
A kind of Bidirectional expansion valve and its flow control methods Download PDFInfo
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- CN104457049B CN104457049B CN201310420028.6A CN201310420028A CN104457049B CN 104457049 B CN104457049 B CN 104457049B CN 201310420028 A CN201310420028 A CN 201310420028A CN 104457049 B CN104457049 B CN 104457049B
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- epicoele
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 31
- 229910052710 silicon Inorganic materials 0.000 claims description 31
- 239000010703 silicon Substances 0.000 claims description 31
- 239000012530 fluid Substances 0.000 claims description 25
- 238000010079 rubber tapping Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 11
- 238000002789 length control Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000003507 refrigerant Substances 0.000 description 9
- 238000007789 sealing Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
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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
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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
- F25B41/38—Expansion means; Dispositions thereof specially adapted for reversible cycles, e.g. bidirectional expansion restrictors
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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
- F25B49/00—Arrangement or mounting of control or safety devices
-
- 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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/06—Details of flow restrictors or expansion valves
- F25B2341/067—Expansion valves having a pilot valve
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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
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—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 invention belongs to refrigeration technology field, more particularly to a kind of Bidirectional expansion valve on refrigeration plant, including valve body, valve element, first adapter and the second adapter, body wall is provided with micro-valve, runner epicoele is connected by upper chamber passage with micro-valve, runner cavity of resorption is connected by cavity of resorption passage with micro-valve, under Bidirectional expansion valve forward direction circulation status, micro-valve control runner epicoele connects with valve element epicoele, under Bidirectional expansion valve reverse circulated state, valve element control runner cavity of resorption connects with valve element epicoele, the present invention solves the problems, such as that expansion valve can only realize the throttling on single direction, it is simple in construction, reliability is high, noise is small, cost is low.
Description
Technical field
The invention belongs to refrigeration technology field, particularly a kind of Bidirectional expansion valve on refrigeration plant.
Background technology
Existing MEMS expansion valves can only realize the throttling on single direction, it is impossible to the throttling of its opposite direction is realized, but greatly
Most air-conditioning systems possess various modes, refrigeration, heating etc., with greater need for the expansion valve with two-way accurate throttling function, with letter
Change system architecture, and can be cost-effective.
If existing electric expansion valve will reach higher flow control accuracy, just have to slow down its governing speed,
I.e. the response time is slow, it is impossible to reaches the purpose of the quick control degree of superheat.
Existing electronic expansion valve structure is complicated simultaneously, and stability is poor, and its two-way valve is more difficult to ensure the one of forward and reverse flow
Cause property, i.e., flow of electronic expansion valve controlling curve is stable when positive, and when it is reversed flow control, the fluctuation of its curve
Property is unstable, and inconsistent, such fluctuation and inconsistency during with forward direction, and electric expansion valve can be made to have in actual applications very
Big limitation.
The content of the invention
The problem to be solved in the present invention is to provide a kind of Bidirectional expansion valve and two-way swollen that can realize bidirectional throttle control
The flow control methods of swollen valve.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：A kind of Bidirectional expansion valve, including valve body,
Valve element, the first adapter and the second adapter, the valve body is interior to be provided with runner epicoele and runner cavity of resorption, the first adapter connection runner
Epicoele, the second adapter connection runner cavity of resorption, the valve element are installed between the runner epicoele and runner cavity of resorption and can lived up and down
It is dynamic, valve port is provided between the runner epicoele and runner cavity of resorption, valve is provided between the valve element upper surface and body cavity upper end
Core epicoele, is provided with valve element cavity of resorption between the valve element lower surface and body cavity lower end, the valve element epicoele and valve element cavity of resorption are equal
Provided with elastic component, the body wall is provided with micro-valve, and the runner epicoele is connected by upper chamber passage with micro-valve, under the runner
Chamber is connected by cavity of resorption passage with micro-valve, under Bidirectional expansion valve forward direction circulation status, on micro-valve control runner epicoele and valve element
Chamber connects, and under Bidirectional expansion valve reverse circulated state, valve element control runner cavity of resorption connects with valve element epicoele.
Improved, the micro-valve includes the first silicon layer, the second silicon layer and the 3rd silicon layer being laminated mutually, and the 3rd silicon layer includes
Upper chamber passage interface, cavity of resorption channel interface, valve element epicoele interface and valve element cavity of resorption interface, the upper chamber passage connect with upper chamber passage
Mouth connection, cavity of resorption passage connect with cavity of resorption channel interface, and valve element epicoele interface connects with valve element epicoele, valve element cavity of resorption interface and valve
Core cavity of resorption connects, and second silicon layer is provided with moving sheet, under Bidirectional expansion valve forward direction circulation status, moving sheet control epicoele
Channel interface and valve element epicoele orifice, under Bidirectional expansion valve reverse circulated state, moving sheet control cavity of resorption channel interface
With valve element epicoele orifice.
Improved, the valve element epicoele interface is connected by capillary with valve element epicoele, and valve element cavity of resorption interface passes through capillary
Pipe connects with valve element cavity of resorption.
Improved, under Bidirectional expansion valve forward direction circulation status, micro-valve control runner cavity of resorption connects with valve element cavity of resorption, double
To under expansion valve reverse circulated state, micro-valve control runner epicoele connects with valve element cavity of resorption.
Improved, the elastic component is holddown spring or elastic sheet metal.
Improved, the valve body upper end is provided with upper end cover, and valve body lower end is provided with bottom end cover.
A kind of flow control methods of Bidirectional expansion valve, the Bidirectional expansion valve include valve body and valve element, on the valve body
The first adapter and the second adapter are connected with, runner epicoele and runner cavity of resorption are provided with the valve body, the first adapter is connected on runner
Chamber, the second adapter connection runner cavity of resorption, is provided with valve port, is formed between valve element upper end and valve body between runner epicoele and runner cavity of resorption
Valve element epicoele, valve element cavity of resorption is formed between valve element lower end and valve body；The valve element, which moves up and down, controls valve port opening and closing, the valve body
Side is additionally provided with the micro-valve that fluid flows in application valve body, and the first adapter feed liquor, second takes over out liquid, and control micro-valve action makes stream
The fluid of intracavitary introduces valve element epicoele on road, for driving valve element to be moved to valve element cavity of resorption, opens valve port, realizes Bidirectional expansion valve
Positive circulation；Second adapter feed liquor, first takes over out liquid, and control micro-valve action makes the fluid of intracavitary under runner introduce on valve element
Chamber, for driving valve element to be moved to valve element cavity of resorption, valve port is opened, realizes the reverse circulated of Bidirectional expansion valve.
It is improved, under Bidirectional expansion valve forward direction circulation status, control action in micro-valve to draw the pressure of valve element cavity of resorption
Into runner cavity of resorption；Under Bidirectional expansion valve reverse circulated state, control micro-valve action is drawn out to the pressure of valve element cavity of resorption
In runner epicoele.
Improved, under Bidirectional expansion valve forward direction circulation status, control micro-valve action makes the fluid of intracavitary on runner introduce valve
Core epicoele, for driving valve element to be moved to valve element cavity of resorption to open valve port, and valve port maximum opening is kept, valve can be made by closing micro-valve
Core is resetted with close port, and the stream of Bidirectional expansion valve tapping side is controlled by the time length for keeping valve port to open or closing
Amount；Under Bidirectional expansion valve reverse circulated state, control micro-valve action makes the fluid of intracavitary under runner introduce valve element epicoele, for driving
Movable valve plug is moved to valve element cavity of resorption to open valve port, and keeps valve port maximum opening, and closing micro-valve can close valve core reset
Valve port, the flow of Bidirectional expansion valve tapping side is controlled by the time length for keeping valve port to open or closing.
Beneficial effects of the present invention：
In the present invention, after adopting the above technical scheme, the invention has the advantages that：
By setting micro-valve on body wall, by the control of micro-valve, forward and reverse refrigerant can be accurately controlled
Flow, meanwhile, positive direction flow controlling curve is suitable.
Because micro-valve is that the connection between each distinct interface is controlled by moving sheet, and moving sheet is then driven using electrode
It is dynamic, therefore micro-valve is quick on the draw, reliability is high.Also, the connection between each interface or cut-off are controlled using moving sheet,
Simple in construction, cost is relatively low.
Prior art drives the motion of the valve element of expansion valve using magnet coil or stepper motor mostly, therefore is transporting
Noise can be produced when row, and the present invention is then by the pressure guide valve in the runner under positive circulation or reverse circulated state
In core epicoele, moved by pressure-driven valve element, therefore, smooth running, noise is low.
The present invention these features and advantage will be detailed in following embodiment, accompanying drawing exposure.
Brief description of the drawings
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is the explosive view of Bidirectional expansion valve of the present invention；
Fig. 2 is the right pseudosection of Bidirectional expansion valve of the present invention；
Fig. 3 is the structural representation of the capillary and micro-valve phase passage flow duct section of Bidirectional expansion valve of the present invention；
Fig. 4 is structural representation of the micro-valve of Bidirectional expansion valve of the present invention under positive circulation status；
Fig. 5 is structural representation of the micro-valve of Bidirectional expansion valve of the present invention under reverse circulated state；
Fig. 6 is the internal structure schematic diagram of Bidirectional expansion valve of the present invention.
Embodiment
The present invention provides a kind of Bidirectional expansion valve, including valve body, valve element, the first adapter and the second adapter, in the valve body
Provided with runner epicoele and runner cavity of resorption, the first adapter connection runner epicoele, the second adapter connection runner cavity of resorption, the valve element
It is installed between the runner epicoele and runner cavity of resorption and energy is up and down, the valve body is provided with valve port, the valve element upper end
Valve element epicoele is provided between face and body cavity upper end, is provided between the valve element lower surface and body cavity lower end under valve element
Chamber, the valve element epicoele and valve element cavity of resorption are equipped with elastic component, and the body wall is provided with micro-valve, and the runner epicoele passes through upper
Chamber passage is connected with micro-valve, and the runner cavity of resorption is connected by cavity of resorption passage with micro-valve, in Bidirectional expansion valve forward direction circulation status
Under, micro-valve control runner epicoele connects with valve element epicoele, under Bidirectional expansion valve reverse circulated state, valve element control runner cavity of resorption
Connected with valve element epicoele.By setting micro-valve on body wall, by the control of micro-valve, forward and reverse system can be accurately controlled
The flow of cryogen, meanwhile, positive direction flow controlling curve is suitable.
The technical scheme of the embodiment of the present invention is explained and illustrated with reference to the accompanying drawing of the embodiment of the present invention, but under
It is only the preferred embodiments of the present invention to state embodiment, and not all.Based on the embodiment in embodiment, people in the art
Member obtains other embodiment on the premise of creative work is not made, and belongs to protection scope of the present invention.
Shown in reference picture 1, Fig. 2, a kind of Bidirectional expansion valve, including valve body 1, valve element 4, the first adapter 2 and the second adapter 3,
Runner epicoele 10 and runner cavity of resorption 11 are provided with the valve body 1, meanwhile, the first adapter 2 connection runner epicoele 10, the second adapter 3
Runner cavity of resorption 11 is connected, valve element 4 is installed between the runner epicoele 10 and runner cavity of resorption 11 and can up and down, Ran Hou
Valve port 14 is opened up on valve body 1, valve element 4 between runner epicoele 10 and runner cavity of resorption 11 by moving, to open or shutoff valve
Mouth 14, when valve port 14 is opened, the first adapter 2 connects with the second adapter 3, when valve port 14 is closed, the first adapter 2 and the second adapter 3
Disconnect.Then, be provided with valve element epicoele 12 between the upper surface of valve element 4 and the inner chamber upper end of valve body 1, the lower surface of valve element 4 with valve body 1
Valve element cavity of resorption 13 is provided between chamber lower end, meanwhile, valve element epicoele 12 and valve element cavity of resorption 13 are equipped with elastic component, that is, valve element 4
Elastic component is provided between both ends and valve body 1, valve element 4 can be made to move up and down.When it is implemented, valve element 4 and the inner chamber chamber of valve body 1
To be slidingly sealed cooperation between wall, the pressure in runner epicoele 10 or runner cavity of resorption 11 is set not leak.Also, in valve body 1
Micro-valve 5 is set in side wall, and micro-valve 5 is fixed in the side wall of valve body 1 by capping 6, and runner epicoele 10 then is passed through into upper chamber passage
15 are connected with micro-valve 5, and runner cavity of resorption 11 is connected by cavity of resorption passage 16 with micro-valve 5, under Bidirectional expansion valve forward direction circulation status,
Namely refrigerant from the first adapter 2 flow into when, micro-valve 5 controls runner epicoele 10 to be connected with valve element epicoele 12, so that by runner
Pressure Pilot poppet epicoele 12 in epicoele 10, driving valve element 4 move downward, and open valve port 14, connect the first adapter 2 and second
Adapter 3；Under Bidirectional expansion valve reverse circulated state, that is, when refrigerant is flowed into by the second adapter 3, valve element 4 controls runner
Cavity of resorption 11 connects with valve element epicoele 12, by the pressure Pilot poppet epicoele 12 in runner cavity of resorption 11, so as to drive valve element 4 to transport downwards
It is dynamic, valve port 14 is opened, connects the first adapter 2 and the second adapter 3 so that the refrigerant in the second adapter 3 flows into the first adapter 2.
Micro-valve is set in the side wall of valve body, then by the control of micro-valve, the flow of forward and reverse fluid can be accurately controlled, so as to
In the case where realization is two-way circulated, moreover it is possible to carry out flow control.
Shown in reference picture 2, Fig. 3, Fig. 4, Fig. 5, micro-valve 5 includes the first silicon layer 19, the second silicon layer 18 and the being laminated mutually
Three silicon layers 17, for the second silicon layer 18 between the first silicon layer 19 and the 3rd silicon layer 17, the 3rd silicon layer 17 is close to valve body 1, Ran Hou
3rd silicon layer 17 includes upper chamber passage interface 20, cavity of resorption channel interface 21, valve element epicoele interface 22 and valve element cavity of resorption interface 23, together
When, upper chamber passage 15 connects with upper chamber passage interface 20, and cavity of resorption passage 16 connects with cavity of resorption channel interface 21, valve element epicoele interface
22 are connected with valve element epicoele 12, and valve element cavity of resorption interface 23 connects with valve element cavity of resorption 13, and movement is finally provided with the second silicon layer 18
Piece 24, driving moving sheet 24 moves after the electrode 25 set on the first silicon layer 19 is powered, in Bidirectional expansion valve forward direction circulation status
Under, moving sheet 24 controls upper chamber passage interface 20 to be connected with valve element epicoele interface 22, under Bidirectional expansion valve reverse circulated state,
Moving sheet 24 controls cavity of resorption channel interface 21 to be connected with valve element epicoele interface 22.Micro-valve is that each difference is controlled by moving sheet
Connection between interface, and moving sheet then uses electrode drive, therefore micro-valve is quick on the draw, reliability is high.Also, using movement
Piece controls connection or the cut-off between each interface, and simple in construction, cost is relatively low.Meanwhile prior art is mostly using electricity
Magnetic coil or stepper motor drive the motion of the valve element of expansion valve, therefore noise can be produced when operation, and this hair
It is bright then by the pressure Pilot poppet epicoele in the runner under positive circulation or reverse circulated state, pass through pressure-driven valve element
Motion, therefore, smooth running, noise is low.
, it is necessary to which explanation, valve element epicoele interface 22 are connected by capillary 7 with valve element epicoele 12 shown in reference picture 3, valve
Core cavity of resorption interface 23 is connected by capillary 7 with valve element cavity of resorption 13.In particular：Valve element is additionally provided with the valve body of the present embodiment
Upper chamber passage 27 and valve element cavity of resorption passage 28, valve element upper chamber passage 27 connect with valve element epicoele interface 22, valve element cavity of resorption passage 28
Connected with valve element cavity of resorption interface 23, therefore, valve element epicoele interface 22 is connected by capillary 7 with valve element epicoele 12, it is possible to understand that
For：Connected by valve element upper chamber passage 27 between valve element epicoele interface 22 and capillary 7, then be communicated to by capillary 7 on valve element
Chamber 12；Similarly, connected by valve element cavity of resorption passage 28 between valve element cavity of resorption interface 23 and capillary 7, then be communicated to by capillary
Valve element cavity of resorption 13.
Shown in reference picture 2, when Bidirectional expansion valve is in positive circulation status, i.e., refrigerant enters from runner epicoele 10,
And valve element 4 moves downward, therefore pressure is there are in valve element cavity of resorption 13, therefore, moving sheet 24 is in connection upper chamber passage interface 20
While with valve element epicoele interface 22, also cavity of resorption runner interface 21 is connected with valve element cavity of resorption interface 23, i.e., runner cavity of resorption 11 with
Valve element cavity of resorption 13 connects, so as to which the pressure in valve element cavity of resorption 13 is exported in runner cavity of resorption 11；Likewise, work as two-way expansion
Under valve reverse circulated state, moving sheet 24 controls runner epicoele 10 to be connected with valve element cavity of resorption 13, so as to by valve element cavity of resorption 13
Pressure is exported in runner epicoele 10.Designed more than, be advantageous to valve element 4 and move downward, reduce valve element 4 and move downward
When resistance.
Shown in reference picture 2, herein, it is necessary to illustrate, the elastic component in the present embodiment is preferably holddown spring 9,
It can be elastic sheet metal.Meanwhile in order to improve the maintainability of valve body 1, make it easy to maintain, the installation of the upper end of valve body 1
There is upper end cover 8, the lower end of valve body 1 is provided with bottom end cover 26, and upper end cover 8 and bottom end cover 26 are arranged on valve body 1 by sealing ring respectively
On.By disassembling upper end cover 8 and bottom end cover 26, valve element 4 can be taken out.
Meanwhile the scheme of choosing is changed as another kind, valve body one end is provided with end cap, valve body other end closing, that is to say, that valve
Body one end open, other end is molded with valve body, and in sealing state, opening installs end cap to seal, when it is implemented,
Valve body can set end cap, lower end closed in upper end；Can also lower end set end cap, upper end sealing.
The operation logic of Bidirectional expansion valve of the present invention is as follows：
Shown in reference picture 6, during positive Circulation, refrigerant is entered in air stream enter runner epicoele 10 by the first adapter 2, then,
The moving sheet movement of the second silicon layer in micro-valve, makes runner epicoele 10 be connected with valve element epicoele 12, i.e., by runner epicoele 10
Pressure Pilot poppet epicoele 12, and runner cavity of resorption 11 connects with valve element cavity of resorption 13, the pressure of valve element cavity of resorption 13 is drawn out to runner
In cavity of resorption 11, now the pressure of the upper surface of valve element 4 is more than the pressure of the lower surface of valve element 4, moves down valve element 4, opens valve port
14, when the command pressure that a Linear Driving in proportion is transmitted to micro-valve, make the upper end surface pressure of valve element 4 and the lower end face pressure of valve element 4
Power reaches balance, then the position of valve element 4 is determined, so that refrigerant flow is controlled.
When reverse circulated works, refrigerant is taken over into air stream enter runner cavity of resorption by second, then, the second silicon layer in micro-valve
Moving sheet movement, runner cavity of resorption is connected with valve element epicoele, i.e., by the pressure introducing valve element epicoele in runner cavity of resorption, and runner
Epicoele connects with valve element cavity of resorption, the pressure of valve element cavity of resorption is drawn out in runner epicoele, now the pressure of valve element upper surface is more than
The pressure of valve element lower surface, moves down valve element, opens valve port, when the instruction that a Linear Driving in proportion is transmitted to micro-valve
Pressure, valve element upper end surface pressure is set to reach balance with valve element lower end surface pressure, then spool position is determined, so that reverse flow
The flow of logical refrigerant is controlled.
A kind of flow control methods of Bidirectional expansion valve, Bidirectional expansion valve include：Including valve body, valve element, first adapter and
Second adapter, valve body is interior to be provided with runner epicoele and runner cavity of resorption, and the first adapter connection runner epicoele, second takes under connection runner
Chamber, valve element are installed between the runner epicoele and runner cavity of resorption and can be up and down, and valve body is provided with valve port, valve element upper surface
Valve element epicoele is provided between body cavity upper end, valve element cavity of resorption, valve element are provided between valve element lower surface and body cavity lower end
Epicoele and valve element cavity of resorption are equipped with elastic component, and body wall is provided with micro-valve, and runner epicoele is connected by upper chamber passage with micro-valve, stream
Road cavity of resorption is connected by cavity of resorption passage with micro-valve, and micro-valve includes the first silicon layer, the second silicon layer and the 3rd silicon layer being laminated mutually, the
Three silicon layers include upper chamber passage interface, cavity of resorption channel interface, valve element epicoele interface and valve element cavity of resorption interface, upper chamber passage and epicoele
Channel interface is connected, and cavity of resorption passage is connected with cavity of resorption channel interface, and valve element epicoele interface is connected by capillary with valve element epicoele,
Valve element cavity of resorption interface is connected by capillary with valve element cavity of resorption, and moving sheet is provided with the second silicon layer.
When Bidirectional expansion valve is positive to circulate, control the second silicon layer in micro-valve moving sheet movement make upper chamber passage interface with
Valve element epicoele orifice, due to upper chamber passage and upper chamber passage orifice, valve element epicoele interface connects with valve element epicoele, because
This, liquid is taken over into air stream enter runner epicoele by first, then flows into micro-valve from runner epicoele by upper chamber passage, due to drawing for micro-valve
Stream is acted on, and liquid is entered in valve element epicoele by valve element epicoele interface, due to the effect of fluid pressure in valve element epicoele, drives valve
Core moves downward, and opens valve port, liquid is entered the second adapter by runner cavity of resorption, has connected the first adapter and the second adapter.
When Bidirectional expansion valve reverse circulated, control micro-valve in the second silicon layer moving sheet movement make cavity of resorption channel interface with
Valve element epicoele orifice, because cavity of resorption passage connects with cavity of resorption channel interface, valve element epicoele interface connects with valve element epicoele, because
This, runner cavity of resorption connects with valve element epicoele, and therefore, liquid is taken over into air stream enter runner cavity of resorption from second, is passing through cavity of resorption passage, capillary
Guan Hou, into valve element epicoele, due to the effect of fluid pressure in valve element epicoele, driving valve element moves downward, and opens valve port, makes
Liquid enters the second adapter by runner cavity of resorption, has connected the first adapter and the second adapter.
As further improved, when Bidirectional expansion valve is positive to circulate, the moving sheet of the second silicon layer in micro-valve is controlled to move
It is dynamic so that cavity of resorption channel interface and valve element cavity of resorption orifice, because valve element cavity of resorption interface connects with valve element cavity of resorption, cavity of resorption passage
Interface is connected on cavity of resorption passage, and therefore, runner cavity of resorption connects with valve element cavity of resorption, when valve element moves downward, valve element cavity of resorption
Pressure is drawn out in runner cavity of resorption, reduces the resistance that valve element moves downward；When Bidirectional expansion valve reverse circulated, micro-valve is controlled
In the second silicon layer moving sheet movement make upper chamber passage interface and valve element cavity of resorption orifice, because upper chamber passage interface is connected to
On upper chamber passage, valve element cavity of resorption interface connects with valve element cavity of resorption, and therefore, runner epicoele connects with valve element cavity of resorption, when valve element is downward
During motion, the pressure of valve element cavity of resorption is drawn out in runner epicoele, reduces the resistance that valve element moves downward.
Herein it should be noted that Bidirectional expansion valve has the mode of another driving moving sheet, controlled using switch
Molding formula, by the time length of the opening and closing of control bound, control flow.When it is implemented, in Bidirectional expansion valve just
To under circulation status, that is, the first adapter feed liquor, second liquid is taken over out, after fluid enters air stream enter runner epicoele, by controlling micro-valve
The movement of interior moving sheet, runner epicoele are connected by upper chamber passage with valve element epicoele, therefore fluid enters valve element epicoele, together
When, fluid pressure actuated valve element is moved to valve element cavity of resorption to open valve port, and keeps valve port to be in maximum aperture, now,
Then fluid, controls the moving sheet movement in micro-valve, is allowed to slowly to close micro- in the tapping side maximum flow of Bidirectional expansion valve
Valve, therefore fluid is gradually reduced to the pressure of valve element epicoele, while the power for acting on valve element top is also less and less, valve element starts
Reset, the fluid in valve element epicoele is slowly flowed back in runner epicoele by micro-valve, finally, moving sheet movement is completed, micro-
Valve is closed, and valve core reset and closes valve port, therefore the time length control that valve port can be kept to open or close is two-way swollen
The flow of swollen valve tapping side, valve port is opened one end time, and the flow of Bidirectional expansion valve tapping side is to stablize constant state, when
The flow of change Bidirectional expansion valve tapping side is needed, control micro-valve is carried out close port, closed a period of time, two-way so as to reduce
The flow of expansion valve tapping side.
Under Bidirectional expansion valve reverse circulated state, that is to say, that the second adapter feed liquor, first takes over out liquid, and fluid enters
After runner cavity of resorption, by controlling the movement of the moving sheet in micro-valve, runner cavity of resorption is connected by cavity of resorption passage with valve element epicoele, because
This fluid enters valve element epicoele, meanwhile, fluid pressure actuated valve element is moved to valve element cavity of resorption to open valve port, and keeps valve port
In maximum aperture, now, fluid Bidirectional expansion valve tapping side maximum flow, then, control micro-valve in moving sheet
It is mobile, it is allowed to slowly close micro-valve, therefore fluid is gradually reduced to the pressure of valve element epicoele, while act on the power on valve element top
Also less and less, valve element starts to reset, and the fluid in valve element epicoele is slowly flowed back in runner cavity of resorption by micro-valve, most
Eventually, moving sheet movement is completed, and micro-valve is closed, and valve core reset and closes valve port, therefore valve port can be kept to open or close
Time length control Bidirectional expansion valve tapping side flow, valve port is opened one end time, the stream of Bidirectional expansion valve tapping side
Measure to stablize constant state, when the flow for needing change Bidirectional expansion valve tapping side, control micro-valve carrys out close port, closes one
The section time, so as to reduce the flow of Bidirectional expansion valve tapping side.
The embodiment of the present invention is applied in the Bidirectional expansion valve in refrigeration plant, is particularly applied in air-conditioning equipment.
In addition to above preferred embodiment, the present invention also has other embodiments, and those skilled in the art can be according to this
Invention is variously modified and deformed, and without departing from the spirit of the present invention, all should belong to appended claims of the present invention and determine
The scope of justice.
Claims (10)
1. a kind of Bidirectional expansion valve, including valve body, valve element, the first adapter and the second adapter, the valve body is interior to be provided with runner epicoele
The stream is installed on runner cavity of resorption, the first adapter connection runner epicoele, the second adapter connection runner cavity of resorption, the valve element
And can be up and down between road epicoele and runner cavity of resorption, valve port is provided between the runner epicoele and runner cavity of resorption, its feature exists
In：Valve element epicoele, the valve element lower surface and body cavity lower end are provided between the valve element upper surface and body cavity upper end
Between be provided with valve element cavity of resorption, the valve element epicoele and valve element cavity of resorption are equipped with elastic component, and the body wall is provided with micro-valve, described
Runner epicoele is connected by upper chamber passage with micro-valve, and the runner cavity of resorption is connected by cavity of resorption passage with micro-valve, in two-way expansion
Under valve forward direction circulation status, micro-valve control runner epicoele connects with valve element epicoele, under Bidirectional expansion valve reverse circulated state, valve
Core control runner cavity of resorption connects with valve element epicoele.
A kind of 2. Bidirectional expansion valve according to claim 1, it is characterised in that：The micro-valve includes first be laminated mutually
Silicon layer, the second silicon layer and the 3rd silicon layer, the 3rd silicon layer include upper chamber passage interface, cavity of resorption channel interface, valve element epicoele interface and
Valve element cavity of resorption interface, the upper chamber passage and upper chamber passage orifice, cavity of resorption passage connects with cavity of resorption channel interface, on valve element
Chamber interface connects with valve element epicoele, and valve element cavity of resorption interface connects with valve element cavity of resorption, and second silicon layer is provided with moving sheet, double
To under expansion valve forward direction circulation status, moving sheet control upper chamber passage interface and valve element epicoele orifice, in Bidirectional expansion valve
Under reverse circulated state, moving sheet control cavity of resorption channel interface and valve element epicoele orifice.
A kind of 3. Bidirectional expansion valve according to claim 2, it is characterised in that：The valve element epicoele interface passes through capillary
Connected with valve element epicoele, valve element cavity of resorption interface is connected by capillary with valve element cavity of resorption.
A kind of 4. Bidirectional expansion valve according to claim 1, it is characterised in that：In Bidirectional expansion valve forward direction circulation status
Under, micro-valve control runner cavity of resorption connects with valve element cavity of resorption, under Bidirectional expansion valve reverse circulated state, micro-valve control runner epicoele
Connected with valve element cavity of resorption.
A kind of 5. Bidirectional expansion valve according to claim 1, it is characterised in that：The elastic component is holddown spring or elasticity
Sheet metal.
A kind of 6. Bidirectional expansion valve according to any one of claim 1 to 5, it is characterised in that：The valve body upper end is provided with
Upper end cover, valve body lower end are provided with bottom end cover.
A kind of 7. Bidirectional expansion valve according to any one of claim 1 to 5, it is characterised in that：Described valve body one end is provided with
End cap, the closing of the valve body other end.
A kind of 8. flow control methods of Bidirectional expansion valve, it is characterised in that：The Bidirectional expansion valve includes valve body and valve element, institute
State and the first adapter and the second adapter are connected with valve body, runner epicoele and runner cavity of resorption are provided with the valve body, the first adapter connects
Passage flow duct epicoele, the second adapter connection runner cavity of resorption, is provided with valve port, valve element upper end and valve body between runner epicoele and runner cavity of resorption
Between formed valve element epicoele, between valve element lower end and valve body formed valve element cavity of resorption；The valve element, which moves up and down, controls valve port opening and closing,
The valve body side is additionally provided with the micro-valve that fluid flows in application valve body；
First adapter feed liquor, second takes over out liquid, and control micro-valve action makes the fluid of intracavitary on runner introduce valve element epicoele, is used for
Driving valve element moves to valve element cavity of resorption, opens valve port, realizes the positive circulation of Bidirectional expansion valve；Second adapter feed tube, first
Liquid is taken over out, control micro-valve action makes the fluid of intracavitary under runner introduce valve element epicoele, for driving valve element to be transported to valve element cavity of resorption
It is dynamic, valve port is opened, realizes the reverse circulated of Bidirectional expansion valve.
A kind of 9. flow control methods of Bidirectional expansion valve according to claim 8, it is characterised in that：In Bidirectional expansion valve
Under positive circulation status, action in micro-valve is controlled the pressure of valve element cavity of resorption is drawn out in runner cavity of resorption；In Bidirectional expansion valve
Under reverse circulated state, control micro-valve action makes the pressure of valve element cavity of resorption be drawn out in runner epicoele.
A kind of 10. flow control methods of Bidirectional expansion valve according to claim 9, it is characterised in that：Bidirectional expansion valve
Under positive circulation status, control micro-valve action makes the fluid of intracavitary on runner introduce valve element epicoele, for driving valve element to valve element
Cavity of resorption motion keeps valve port maximum opening to open valve port, and closing micro-valve can make valve core reset pass through holding with close port
The flow for the time length control Bidirectional expansion valve tapping side that valve port is opened or closed；Bidirectional expansion valve reverse circulated state
Under, control micro-valve action makes the fluid of intracavitary under runner introduce valve element epicoele, for driving valve element to be moved to valve element cavity of resorption to beat
Valve opening mouth, and keep valve port maximum opening, valve core reset can be made with close port by closing micro-valve, by keeping valve port to open or
The flow of the time length control Bidirectional expansion valve tapping side of closing.
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| CN201310420028.6A CN104457049B (en) | 2013-09-13 | 2013-09-13 | A kind of Bidirectional expansion valve and its flow control methods |
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| CN201310420028.6A CN104457049B (en) | 2013-09-13 | 2013-09-13 | A kind of Bidirectional expansion valve and its flow control methods |
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| CN104457049B true CN104457049B (en) | 2018-01-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107559433B (en) * | 2016-06-30 | 2020-11-06 | 重庆华超金属有限公司 | Dehumidification electronic expansion valve of air conditioning system |
| CN106247004A (en) * | 2016-08-26 | 2016-12-21 | 珠海格力电器股份有限公司 | Throttling arrangement and air-conditioner |
| CN107860160B (en) * | 2016-09-21 | 2021-06-22 | 盾安环境技术有限公司 | Bidirectional self-locking MEMS expansion valve and control method |
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| CN104457049A (en) | 2015-03-25 |
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