CN109210206B - A kind of motor-driven valve - Google Patents
A kind of motor-driven valve Download PDFInfo
- Publication number
- CN109210206B CN109210206B CN201710518984.6A CN201710518984A CN109210206B CN 109210206 B CN109210206 B CN 109210206B CN 201710518984 A CN201710518984 A CN 201710518984A CN 109210206 B CN109210206 B CN 109210206B
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- chamber
- valve
- valve port
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- interface
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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
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
- F16K1/44—Details of seats or valve members of double-seat valves
- F16K1/443—Details of seats or valve members of double-seat valves the seats being in series
-
- 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
- F16K1/52—Means for additional adjustment of the rate of flow
-
- 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
-
- 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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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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
Abstract
The invention discloses a kind of motor-driven valves, including valve body, core assembly and coil block, core assembly includes piston, valve seat, needle and rotor, valve seat is provided with the first valve port, the valve body is provided with the second valve port, first interface, second interface, the second valve port and bypass passageways, the one end holding of first valve port is connected with first interface, the other end of first valve port is connected by bypass passageways with second interface, it is provided with third valve port between the second valve port and second interface, is provided directly with check valve in third valve port and second interface；When second interface is as import, when sectional area of the circulation area of the throttling passage formed between needle and the first valve port less than the first valve port, second valve port and third valve port are closed, second interface is connected by bypass passageways and the first valve port with first interface, and the circulation area of the throttling passage formed between needle and the first valve port changes as the distance between needle and the first valve port change.
Description
Technical field
The present invention relates to field of fluid control, and in particular to a kind of motor-driven valve.
Background technique
Requirement with people to energy-saving and emission-reduction is higher and higher, also higher and higher to the performance requirement of air-conditioning system, heat pump
Type air-conditioning system also becomes current popular application.But traditional expansion valve, either electric expansion valve or thermal expansion
Valve is merely able to play the role of throttling.If necessary to realize the function of throttling and completely open and close, generally require within air-conditioning systems
The function of throttling and completely open and close is just able to achieve using the scheme that multiple expansion valves and multiple solenoid valves combine.
With the increase required Performance for Air Conditioning Systems, to the increase that air-conditioning system compact requires, also based on cost
Consider, providing a kind of with throttling and the motor-driven valve of completely open and close function is current those skilled in the art technology urgently to be solved
Problem.
Summary of the invention
In order to solve the above technical problems, the technical solution of the present invention is to provide a kind of motor-driven valve, there is throttling, standard-sized sheet, entirely
Close function.
The present invention provides a kind of motor-driven valve, a kind of motor-driven valve, including valve body, core assembly and coil block, the spool
Component includes piston, valve seat, needle and rotor, and returning spring, the reply are provided between the piston and the valve seat
One end of spring is abutted against with the piston, and the other end of the returning spring is abutted against with the valve seat, the returning spring
In compressive state, the valve seat is provided with the first valve port, and the valve body is provided with chamber open at one end, described open at one end
The bottom wall of chamber be provided with the second valve port, at least part outer wall of the valve seat with it is interior corresponding to the chamber open at one end
Cooperation is sealed between wall, is slidably matched between the piston and the inner wall of the chamber open at one end, the valve body is additionally provided with
First interface, second interface, the second valve port and bypass passageways, the piston be provided be connected to first valve port upper end and
The one end holding of the fluid channel of the first interface, first valve port is connected with the first interface, and described first
The other end of valve port is connected by the bypass passageways with the second interface, is connect in second valve port with described second
It is provided with third valve port between mouthful, is provided directly with check valve in the third valve port and the second interface；
When the second interface is as import, when the needle far from first valve port and the needle at least one
Part is located in first valve port, and the circulation area of the throttling passage formed between the needle and first valve port is less than
The sectional area of first valve port, at this point, the piston is abutted against with second valve port, second valve port is closed, described
Check valve is abutted against with the third valve port, and the third valve port is closed, and the second interface passes through the bypass passageways and institute
It states the first valve port to be connected with the first interface, the circulation of the throttling passage formed between the needle and first valve port
Area changes as the distance between the needle and first valve port change.
Valve body chamber open at one end includes the first sub- chamber, the second sub- chamber and the sub- chamber of third, the first sub- chamber, second
Sub- chamber and the sub- chamber of third are sequentially connected logical, and the internal diameter of the first sub- chamber is greater than the internal diameter of the described second sub- chamber, and described the
The internal diameter of two sub- chambers is greater than the internal diameter of the sub- chamber of the third, and the first interface is connected with first chamber, and the valve body is also
Including the first chamber, the second chamber and third chamber, first chamber is connected with the first interface, the third chamber and described second
Interface is connected, wherein and first chamber is connected with the sub- chamber of the third, and second chamber is located at the lower section of the sub- chamber of third,
For second valve port between second chamber and the sub- chamber of the third, second chamber is located at first chamber and third chamber
Between, it is not connected to directly between first chamber and second chamber, is connected between second chamber and third chamber, the side
Circulation passage is disposed adjacent with the sub- chamber of the third, and one end of the bypass passageways is located at the bottom wall of the described second sub- chamber, the side
The other end in channel is located at the side of the third chamber.
Interconnecting part is also provided between first chamber and the sub- chamber of third, the interconnecting part is connected to first chamber
With the sub- chamber of third, from first chamber to the extending direction of the sub- chamber of the third, the bottom wall of the interconnecting part is gradually raised and is in
Helicoidal structure.
The third valve port is arranged between second chamber and the third chamber, the check valve setting and the third
Chamber, the check valve include inner elements of check valve and bracket, and the inner elements of check valve can be free to slide along the bracket, when described
When inner elements of check valve and the third valve port abut against, the bypass passageways are connected by the third chamber with the second interface
It is logical.
The valve seat includes the first valve seat body and the second valve seat body, first valve seat body and the second valve seat body
It is disposed adjacent, the outer diameter of first valve seat body is greater than the outer diameter of the second valve seat body, and the valve seat is additionally provided on valve seat
Chamber, first valve port are arranged in part corresponding to the bottom wall of the valve seat epicoele, the valve seat be additionally provided with first passage and
One end of second channel, first valve port is connected with the first passage, the other end of first valve port and described the
Two channels are connected, and for the second channel through bottom wall connection outside the valve seat of the valve seat epicoele, described first is logical
Road is located at the outer wall of second valve seat body far from one end of first valve port, and the first passage is connected to first valve
The one end of mouth and the bypass passageways.
Clearance fit between the outer wall of first valve seat body and the inner wall of the first sub- chamber, in first valve seat
It is provided at least one first seal between the outer wall of main body and the inner wall of the first sub- chamber, one of second valve seat body
Quartile is located at the described second sub- chamber, second valve seat body in the described first sub- chamber, a part of second valve seat body
A part be located at the sub- chamber of the third, second valve seat body is located at the interior of the outer wall of the sub- cavity segment of third and the sub- chamber of third
Clearance fit between wall, be provided between the outer wall of second valve seat body and the inner wall of the sub- chamber of third at least one second
Sealing element, the first passage are located at the described second sub- chamber in the port of the second valve seat body outer wall section, and described second
Annular channel, the annular channel connection described first are formed between the inner wall of sub- chamber and the outer wall of second valve seat body
Channel and the bypass passageways.
The lower end of first valve seat body be provided at least one annular detent projection, the detent projection with
The bottom wall of the first sub- chamber abuts against, and the hardness of the detent projection is greater than the hardness of the bottom wall of the described first sub- chamber, in institute
When stating the bottom wall of detent projection and the first sub- chamber and abutting against, the detent projection can be embedded in the bottom wall of the described first sub- chamber；
Or the bottom wall of the described first sub- chamber is provided at least one annular detent projection, the detent projection and institute
The lower end for stating the first valve seat body abuts against, and the hardness of the detent projection is greater than the lower end of first valve seat body
Hardness, when the lower end of the detent projection and the first valve seat body abuts against, the detent projection can be embedded in described the
In the lower end of one valve seat body.
The piston includes first piston main body and second piston main body, and the outer diameter of the first piston main body is greater than described
The outer diameter of second piston main body, the piston are additionally provided with piston upper chamber and sealing block accommodating chamber, the piston upper chamber and sealing
Block accommodating chamber is located at the opposite sides of the piston, and the piston is additionally provided with the first subchannel and the second subchannel, wherein institute
The one end for stating the first subchannel is located at the corresponding bottom wall of the piston upper chamber, the other end of first subchannel and described the
Two subchannels are connected, and second subchannel is located at the lower section of first subchannel, and the piston upper chamber passes sequentially through institute
It states the first subchannel and the second subchannel is connected to the piston exterior, second subchannel includes described at least one is located at
The port of second piston body outer wall is slided between the outer wall of the first piston main body and the inner wall of the sub- chamber of the third and is matched
It closes, is provided with third sealing element between the outer wall of the first piston main body and the inner wall of the sub- chamber of the third, described second
There is a certain distance, first chamber passes through second son between the outer wall of piston main body and the inner wall of the sub- chamber of the third
Channel, the first subchannel and second channel are connected to valve seat epicoele holding.
When the first interface is import, the motor-driven valve includes full-gear, full off state and first throttle state；
In the full off state, the needle is abutted against with first valve port, the piston and the second valve port phase
It abuts, the first interface is not connected to the second interface；
In the first throttle state, first valve port and the third valve port are opened, and second valve port is closed, institute
The circulation area for stating the throttling passage formed between needle and first valve port is less than or equal to the sectional area of first valve port,
The first interface passes sequentially through second subchannel, the first subchannel, second channel, the first valve port, first passage, annular
It is connected after runner, bypass passageways and third chamber with the second interface；
In the full-gear, the needle is opened far from the first valve port, first valve port, the complete position of needle
In outside the first valve port, the circulation area of the throttling passage formed between the needle and first valve port is greater than described first
The circulation area of the throttling passage formed between needle and first valve port under throttle, the piston is far from described second
Valve port, second valve port are opened, and the first interface is connected by second valve port with the second interface.
When the first interface is import, the motor-driven valve includes the second throttle, in second throttle,
The inner elements of check valve is abutted against with the third valve port, and the third valve port is closed, the needle and first valve port it
Between the circulation area of throttling passage that is formed be less than or equal to the sectional area of first valve port, the piston and second valve port
It abuts against, second valve port is closed, and the second interface passes sequentially through the third chamber, bypass passageways, annular channel, first
It is connected after channel, the first valve port, second channel, the first subchannel and the second subchannel with the first interface.
Said electric valve can realize full pass and throttling function when second interface is as import, when second interface is as outlet
When can realize throttling, standard-sized sheet and full Guan Gongneng, reach bidirectional throttle, big flow all-pass and close entirely fluid flowing control.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the motor-driven valve of one embodiment of the invention.
Fig. 2 is schematic cross-sectional view of the motor-driven valve shown in Fig. 1 in complete close.
Fig. 3 is the valve body schematic cross-sectional view of motor-driven valve shown in Fig. 1.
Fig. 4 is the valve seat schematic cross-sectional view of motor-driven valve shown in Fig. 1.
Fig. 5 is the piston schematic cross-sectional view of motor-driven valve shown in Fig. 1.
Fig. 6 is schematic cross-sectional view of the motor-driven valve shown in Fig. 1 in first throttle state.
Fig. 7 is schematic cross-sectional view of the motor-driven valve shown in Fig. 1 in full-gear.
Fig. 8 is schematic cross-sectional view of the motor-driven valve shown in Fig. 1 in the second throttle.
Wherein, the signal direction that arrow flows in attached drawing for fluid.
Specific embodiment
Technical solution of the present invention, orientation described in this specification are illustrated with reference to the accompanying drawings and detailed description
What noun was illustrated according to the corresponding orientation relationship in position relation in attached drawing or figure.
As shown in Figure 1, motor-driven valve includes valve body 1, core assembly 2 and coil block 3, wherein coil block 3 can be set
Set on core assembly 2, coil block 3 can be fixed by screw etc. and 1 phase of valve body.It is also provided in coil block 3
Wiring board and connector, wherein wiring board and connector can integrate in one.
As shown in Figures 2 to 5, core assembly 2 includes piston 5, valve seat 4, needle 21 and rotor 22, in piston 5 and valve seat 4
Between be provided with returning spring 7, one end and the piston 5 of returning spring 7 abut against, and the other end and the valve seat 4 of returning spring 7 offset
It connects, returning spring 7 is in compressive state.Wherein valve seat 4 is fixed with 1 phase of valve body, and rotor 22 can turn under the driving of coil block 3
Dynamic, needle 21 can carry out bottom and top feed movement under the drive of rotor 22.
As shown in figure 4, valve seat 4 includes superposed first valve seat body 41 and the second valve seat body positioned at lower part
42, wherein the first valve seat body 41 is disposed adjacent with the second valve seat body 42, the outer diameter of the first valve seat body 41 is greater than the second valve
The outer diameter of seat main body 42 is provided at least one for accommodating the groove of sealing element, at this in the outer wall of the first valve seat body 41
In embodiment, the groove for sealing element to be arranged is two.Valve seat 4 is additionally provided with valve seat epicoele 44 and valve seat cavity of resorption 47, valve seat
Epicoele 44 is relatively distant from the open at one end of valve seat cavity of resorption 47, and valve seat cavity of resorption 47 is relatively distant from the open at one end of valve seat epicoele 44.Valve
Seat 4 is additionally provided with the second channel 45 of connection valve seat epicoele 44 and valve seat cavity of resorption 47.Valve seat 4 is additionally provided with the first valve port 43, the
The setting of one valve port 43, in the part corresponding with the bottom of valve seat epicoele 44 of valve seat 4, the first valve port 43 and 45 phase of second channel
Neighbour's setting.Second valve seat body 42 is provided with first passage 46, one end of first passage 46 is connected with the first valve port 43,
The other end of first passage 46 is located at the outer wall of the second valve seat body 42, and the first valve port 43 can pass through first passage 46 and valve seat
It is connected outside 4.
The outer wall of second valve seat body 42 is also equipped with the groove for accommodating sealing element, the outer wall of the second valve seat body 42
Groove be located at the lower section of first passage 46.
It is pointed out here that in other embodiments, can also be not provided with valve seat cavity of resorption 47, valve seat epicoele 44 can pass through
It is connected outside second channel 45 and valve seat 4.It in the present embodiment, can be with the one of returning spring 7 by setting valve seat cavity of resorption 47
End is placed in valve seat cavity of resorption 47, can be improved the stability of returning spring 7, prevents returning spring 7 from shifting.
As shown in Figure 1, rotor 22 can drive needle 21 to move up and down, enable needle 21 far from the first valve port 43 or
Person abuts against with the first valve port 43, by the distance between needle 21 and the first valve port 43 relationship, can control fluid by the
The flow of one valve port 43.When needle 21 and the first valve port 43 abut against, the first valve port 43 is closed, and fluid can not pass through first
Valve port 43；As needle 21 is gradually distance from the first valve port 43, fluid is gradually increased by the flow of the first valve port 43, when fluid is logical
When crossing the circulation area of the first valve port 43 less than first passage 46 and/or second channel 45, between needle 21 and the first valve port 43
The channel of formation can be used as throttling passage, when high-pressure refrigerant passes through the channel formed between needle 21 and the first valve port 43
When, low pressure refrigerant is formed after high-pressure refrigerant reducing pressure by regulating flow.In the present embodiment, the internal diameter of the first valve port 43 is logical less than first
The internal diameter in road 46 and/or second channel 45.
As shown in figure 3, valve body 1 is provided with chamber open at one end, comprising: the first sub- chamber 181, the second sub- chamber 182 and third
Sub- chamber 183.Valve body 1 is provided with first interface 11, second interface 12, the first chamber 19, the second chamber 16, third chamber 17, the first sub- chamber
181, the second sub- chamber 182 and the sub- chamber 183 of third, wherein the first sub- chamber 181, the second sub- chamber 182 and the sub- chamber 183 of third are from top to bottom
Be arranged and be sequentially connected it is logical, and the internal diameter of the first sub- chamber 181 be greater than the second sub- chamber 182 internal diameter, the internal diameter of the second sub- chamber 183
Greater than the internal diameter of the sub- chamber 183 of third.First sub- chamber 181 it is open at one end, and the first sub- chamber 181 close to opening portion be arranged
There is internal screw thread 184.
First interface 11 is connected with the first chamber 19, and the first chamber 19 is connected with the sub- chamber 183 of third.In the first chamber 19 and
Three sub- chambers 183 position that is connected is also provided with interconnecting part 185, and the bottom wall of interconnecting part 185 structure in the shape of a spiral passes through setting
Interconnecting part 185 can enable fluid to more smoothly flow to the sub- chamber 183 of third from the first chamber 19, and interconnecting part 185 can play
Guide the effect of fluid flowing.
Second chamber 16 is located at the lower section of the sub- chamber 183 of third, and the second chamber 16 is between the first chamber 19 and third chamber 17,
It is not connected to directly between first chamber 19 and the second chamber 16, is connected between the second chamber 16 and third chamber 17.In the second chamber 16 and
The second valve port 13 is additionally provided between three sub- chambers 183, the first chamber 19 can pass through the sub- chamber 183 of third and the second valve port 13 and second
Chamber 16 is connected.
Third chamber 17 is connected with second interface 12, and the sub- chamber 183 of third can pass through the second valve port 16, third chamber 17 and
Two interfaces 12 are connected and/or the sub- chamber 183 of third can have second by the second sub- chamber 182, bypass passageways 15, third chamber 17
Interface 12 is connected.
In the present embodiment, third valve port 14 is additionally provided between the second chamber 16 and third chamber 17, the second chamber 16 passes through
Third valve port 14 is connected with third chamber 14.
Valve body 1 is additionally provided with a bypass passageways 15, and one end of bypass passageways 15 is connected with the second sub- chamber 182, and bypass is logical
The other end in road 15 is connected with third chamber 17, and bypass passageways 15 are connected to the second sub- chamber 182 and third chamber 17.In the present embodiment
In, bypass passageways 15 are parallel with the sub- chamber 183 of third, can be directly through the second sub- chamber in this way when processing bypass passageways 15
182 bottom wall is to third chamber 17.
As shown in figure 5, piston 5 includes first piston main body 55 and second piston main body 56, wherein first piston main body 55
Outer diameter be greater than the outer diameter of second piston main body 56, piston 5 is additionally provided with piston upper chamber 54 and sealing block accommodating chamber 51, on piston
Chamber 54 and sealing block accommodating chamber 51 are located at the opposite sides of piston 5.Piston 5 is additionally provided with the first subchannel 52 and the second subchannel
53, wherein one end of the first subchannel 52 is located at the corresponding bottom wall of piston upper chamber 54, the other end of the first subchannel 52 and
Two subchannels 53 are connected.Second subchannel 53 is located at the lower section of the first subchannel 52, and piston upper chamber 54 can pass sequentially through
One subchannel 52, the second subchannel 53 are connected to piston exterior.
Also, the second subchannel 53 includes that at least one is located at the port of the outer wall of second piston main body 56, when the second son
When the quantity that channel 53 is located at the port of 56 outer wall of second piston main body is more than or equal to 2, can enable a fluid to more smoothly
The first subchannel 52 is flowed to by the second subchannel 53.
As shown in Fig. 2, between the inner wall of the first sub- chamber 181 of the outer wall and valve body 1 of the first valve seat body 41 of valve seat 4
Gap cooperation, is provided at least one first seal between the outer wall of the first valve seat body 41 and the inner wall of the first sub- chamber 181
401.Clearance fit between the inner wall of the sub- chamber 183 of outer wall and third of second valve seat body 42, in the outer of the second valve seat body 42
At least one second seal 402 is provided between wall and the inner wall of the sub- chamber 83 of third.And first passage 46 is in the second valve seat
The port of 42 outer wall section of main body is located at the second sub- chamber 182, since the internal diameter of the second sub- chamber 182 is greater than the internal diameter of the sub- chamber of third,
So being formed with annular channel 104 between the inner wall of the second sub- chamber 182 and the outer wall of the second valve seat body 42.Annular channel 104
It is connected with first passage 46, meanwhile, annular channel 104 is also connected with bypass passageways 15.
Valve seat 4 is fixed by a briquetting 6 and 1 phase of valve body, and briquetting 6 is provided with external screw thread, the external screw thread of briquetting 6 and the first son
The internal screw thread 184 of chamber 181, which is threadedly coupled, to be fixed.
In order to improve the sealing performance between valve seat 4 and the first sub- 181 inner wall of chamber, in the lower end of the first valve seat body 41
It is provided with the detent projection 48 of at least one annular, detent projection 48 and the bottom wall of the first sub- chamber 181 abut against, and dentation is convex
Rise 48 hardness be greater than the first sub- chamber 181 bottom wall hardness, abutted against in detent projection 48 and the bottom wall of the first sub- chamber 181
When, detent projection 48 can be embedded in the bottom wall of the first sub- chamber 181, to further increase sealing performance, reduce leakage risk.
Certainly, the bottom wall in the first sub- chamber also can be set in detent projection.It is pointed out here that passing through setting 401 He of first seal
Detent projection 48 can reduce the leakage risk of motor-driven valve, can reduce the interior leakage of motor-driven valve by the way that second seal 402 is arranged
Risk.
It is slidably matched between the inner wall of the sub- chamber 183 of outer wall and third of the first piston main body 55 of piston 5, in first piston
Third sealing element, the outer wall of second piston main body 56 and are provided between the inner wall of the sub- chamber 183 of the outer wall and third of main body 55
There is a certain distance, in this way, the first chamber 19 can be logical by second the 53, first son of subchannel between the inner wall of three sub- chambers 183
Road 52 and second channel 45 and valve seat epicoele 44 keep connected state.Sealing block, piston 5 are provided in sealing block accommodating chamber 51
It can be abutted against under the action of returning spring 7 with the second valve port 13.
As shown in Figure 1, in the present embodiment, check valve is additionally provided in third chamber 17, check valve includes one-way valve
Core 81 and bracket 82, inner elements of check valve 81 can be free to slide along bracket 82.When the Fluid pressure of 12 side of second interface is greater than
When the Fluid pressure of 14 side of third valve port, inner elements of check valve 81 is abutted against with third valve port 14, and third valve port 14 is closed.When
The Fluid pressure of two interfaces, 12 side is less than when the Fluid pressure of 14 side of third valve port, and inner elements of check valve 81 is far from third valve port
14, third valve port 14 is opened.
Here it should be noted that in the motor-driven valve of other embodiments, check valve can also be not provided with.
It is described further below by the working method of the motor-driven valve of attached drawing the present embodiment.
As shown in Figure 1, motor-driven valve is in full off state, needle 21 is abutted against with the first valve port 43 at this time, and piston 5 is being replied
It is abutted against under the action of spring 7 with the second valve port 13, first interface 11 is neither connected with valve seat epicoele 44, first interface 11
It is not connected with the second chamber 16, first interface 11 is not communicated with second interface 12.It is pointed out here that being moved downward in piston 5
It is the process in a pressurization for the second chamber 16 when closing the second valve port 13, so closing the second valve port 13 in piston 5
When, inner elements of check valve 81 can be opened far from third valve port 14, third valve port 14, and the second chamber 16 passes through third valve port with third chamber 17
14 are connected.
As shown in fig. 6, motor-driven valve is in first throttle state, at this point, needle 21 is far from 43 certain distance of the first valve port,
One valve port 43 is opened, but at least part of needle 21 is located in the first valve port 43.In first throttle state, needle 21 and
Sectional area of the circulation area of the throttling passage formed between one valve port 43 less than the first valve port 43.It is living in first throttle state
Plug 5 abuts against under the pressure difference of fluid and the elastic force effect of returning spring 7 with the second valve port 13, and the second valve port 13 is at this time
Closed state.First interface 11 can pass sequentially through the second subchannel 53, the first subchannel 52, second channel 45, the first valve port
43, it is connected after first passage 46, annular channel 104, bypass passageways 15 and third chamber 17 with second interface 12.It is connect when from first
When the fluids of 11 inflow motor-driven valves of mouth are high-pressure refrigerant, in the throttling passage by being formed between needle 21 and the first valve port 43
When be throttled decompression, at this time motor-driven valve have the function of throttling.It is pointed out here that being formed between needle 21 and the first valve port 43
Throttling passage circulation area less than the smallest channel in the second subchannel 53, the first subchannel 52 and second channel 45 stream
Logical area, can control the circulation area of the throttling passage formed between needle 21 and the first valve port 43 by needle 21, thus
The control of flow is realized, so as to realize the throttling capacity of different requirements.
As shown in fig. 7, motor-driven valve is shown in a fully open operation, needle 21 is beaten far from the first valve port 43, the first valve port 43 at this time
It opens, needle has been fully located at outside the first valve port 43, and first interface 11 can pass sequentially through the second subchannel 53, the first subchannel
52, after second channel 45, the first valve port 43, first passage 46, annular channel 104, bypass passageways 15 and third chamber 17 with second
Chamber 16 is connected.Since the circulation area of the throttling passage formed between needle 21 and the first valve port 43 is less than the first valve port 43
Sectional area, piston 5 move upwards compression reaction spring 7 under the action of the pressure difference of fluid, piston 5 far from the second valve port 13,
Second valve port 13 is opened.First interface 11 can pass sequentially through the second valve port 13, the second chamber 16, third valve port 14 and third chamber
It is connected after 17 with second interface 12.Since fluid passes sequentially through the second valve port 13, the second chamber 16, third valve port 14 and third chamber
17 flow resistance, which is less than, passes sequentially through the second subchannel 53, the first subchannel 52, second channel 45, the first valve port 43,
One channel 46, annular channel 104, bypass passageways 15 and third chamber 17 flow resistance, so fluid pass through first interface 11
When inflow, in this state, fluid largely passes through after the second valve port 13, the second chamber 16, third valve port 14 and third chamber 17 from
The outflow of two interfaces 12, realizes the function of standard-sized sheet.
As shown in figure 8, motor-driven valve is in the second throttle.Due to being additionally provided with check valve in third chamber 17, when
When two interfaces 12 are as entrance, when second interface 12 flows into high-pressure refrigerant, inner elements of check valve 81 is pushed away high-pressure refrigerant
It is abutted against under dynamic with third valve port 14, third valve port 14 is closed.At this point, needle 21 is under the drive of rotor 22 far from the first valve
43 certain distances of mouth, the first valve port 43 are opened, the circulation area of the throttling passage formed between needle 21 and the first valve port 43
Less than or equal to the actual internal area of the first valve port 43, piston 5 under the action of the pressure difference of fluid and returning spring 7 with the second valve
Mouth 13 abuts against, and the second valve port 13 is closed.Second interface 12 can pass sequentially through third chamber 17, bypass passageways 15, annular flow
After road 104, first passage 46, the first valve port 43, second channel 45, the first subchannel 52 and the second subchannel 53 with first interface
11 are connected.
It is pointed out here that also can be realized first throttle state, full off state and standard-sized sheet shape when being not provided with check valve
State.And in the present embodiment, installed when check valve by second interface 12, check valve can also by other means into
Row installation, such as the bear of lower valve body 1 are installed, and can be selected according to the actual situation, this is without limitation.
The above is only specific embodiments of the present invention, is not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the disclosure above technology contents to technical solution of the present invention
Make many possible changes and modifications or equivalent example modified to equivalent change.Therefore, all without departing from skill of the present invention
The content of art scheme, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent variations and repair
Decorations, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (10)
1. a kind of motor-driven valve, including valve body, core assembly and coil block, which is characterized in that the core assembly include piston,
Valve seat, needle and rotor are provided with returning spring, one end of the returning spring and institute between the piston and the valve seat
It states piston to abut against, the other end of the returning spring is abutted against with the valve seat, and the returning spring is in compressive state, institute
It states valve seat and is provided with the first valve port, the valve body is provided with chamber open at one end, is arranged in the bottom wall of the chamber open at one end
There is the second valve port, seals and match between inner wall corresponding at least part outer wall of the valve seat and the chamber open at one end
It closes, is slidably matched between the piston and the inner wall of the chamber open at one end, the valve body is additionally provided with first interface, second
Interface, the second valve port and bypass passageways, the piston are provided with the upper end for being connected to first valve port and the first interface
Fluid channel, first valve port one end holding be connected with the first interface, the other end of first valve port
Portion is connected by the bypass passageways with the second interface, is provided between second valve port and the second interface
Third valve port is provided with check valve between the third valve port and the second interface；
When the second interface is as import, when at least part of the needle far from first valve port and the needle
In first valve port, the circulation area of the throttling passage formed between the needle and first valve port is less than described
The sectional area of first valve port, at this point, the piston is abutted against with second valve port, second valve port is closed, described unidirectional
Valve is abutted against with the third valve port, and the third valve port is closed, and the second interface passes through the bypass passageways and described the
One valve port is connected with the first interface, the circulation area of the throttling passage formed between the needle and first valve port
Change as the distance between the needle and first valve port change.
2. motor-driven valve according to claim 1, which is characterized in that valve body chamber open at one end include the first sub- chamber,
Second sub- chamber and the sub- chamber of third, the first sub- chamber, the second sub- chamber and the sub- chamber of third are sequentially connected logical, and the first sub- chamber
Internal diameter be greater than the internal diameter of the described second sub- chamber, the internal diameter of the second sub- chamber is greater than the internal diameter of the sub- chamber of the third, the valve
Body further includes the first chamber, the second chamber and third chamber, and first chamber is connected with the first interface, the third chamber with it is described
Second interface is connected, wherein first chamber is connected with the sub- chamber of the third, and second chamber is located under the sub- chamber of third
Side, for second valve port between second chamber and the sub- chamber of the third, second chamber is located at first chamber and the
It between three chambers, is not connected to directly between first chamber and second chamber, is connected between second chamber and third chamber, institute
It states bypass passageways to be disposed adjacent with the sub- chamber of the third, one end of the bypass passageways is located at the bottom wall of the described second sub- chamber, institute
The other end for stating by-pass is located at the side of the third chamber.
3. motor-driven valve according to claim 2, which is characterized in that be additionally provided between first chamber and the sub- chamber of third
Interconnecting part, the interconnecting part is connected to first chamber and the sub- chamber of third, from first chamber to the extension side of the sub- chamber of the third
It is gradually raised to, the bottom wall of the interconnecting part and structure in the shape of a spiral.
4. motor-driven valve according to claim 2, which is characterized in that third valve port setting is in second chamber and described
Between third chamber, the check valve is set to the third chamber, and the check valve includes inner elements of check valve and bracket, described unidirectional
Valve core can be free to slide along the bracket, when the inner elements of check valve is abutted against with the third valve port, the bypass
Channel is connected by the third chamber with the second interface.
5. motor-driven valve according to claim 4, which is characterized in that the valve seat includes the first valve seat body and the second valve seat
Main body, first valve seat body are disposed adjacent with the second valve seat body, and the outer diameter of first valve seat body is greater than the second valve
The outer diameter of seat main body, the valve seat are additionally provided with valve seat epicoele, and the bottom wall institute of the valve seat epicoele is arranged in first valve port
Corresponding part, the valve seat are additionally provided with first passage and second channel, one end of first valve port and the first passage
It is connected, the other end of first valve port is connected with the second channel, and the second channel runs through the valve seat epicoele
Bottom wall outside the valve seat connection, the first passage be located at the second valve seat master far from one end of first valve port
The outer wall of body, the first passage be connected to first valve port one end and the bypass passageways.
6. motor-driven valve according to claim 5, which is characterized in that the outer wall of first valve seat body and first son
Clearance fit between the inner wall of chamber is provided at least one between the outer wall of first valve seat body and the inner wall of the first sub- chamber
A first seal, a part of second valve seat body are located at the described first sub- chamber, and one of second valve seat body
Quartile is located at the sub- chamber of the third, second valve seat body in the described second sub- chamber, a part of second valve seat body
The clearance fit between the outer wall of the sub- cavity segment of third and the inner wall of the sub- chamber of third, second valve seat body outer wall and
At least one second seal is provided between the inner wall of the sub- chamber of third, the first passage is in the second valve seat body outer wall
Partial port is located at the described second sub- chamber, is formed between the inner wall of the second sub- chamber and the outer wall of second valve seat body
There is annular channel, the annular channel is connected to the first passage and the bypass passageways.
7. motor-driven valve according to claim 6, which is characterized in that the lower end of first valve seat body be provided with to
A few annular detent projection, the detent projection and the bottom wall of the described first sub- chamber abut against, the detent projection it is hard
Degree is greater than the hardness of the bottom wall of the described first sub- chamber, when the bottom wall of the detent projection and the first sub- chamber abuts against, the tooth
Shape protrusion can be embedded in the bottom wall of the described first sub- chamber；
Or the bottom wall of the described first sub- chamber is provided with the detent projection of at least one annular, the detent projection and described the
The lower end of one valve seat body abuts against, and the hardness of the detent projection is greater than the hard of the lower end of first valve seat body
Degree, when the lower end of the detent projection and the first valve seat body abuts against, the detent projection can be embedded in described first
In the lower end of valve seat body.
8. motor-driven valve according to claim 7, which is characterized in that the piston includes first piston main body and second piston
Main body, the outer diameter of the first piston main body are greater than the outer diameter of the second piston main body, and the piston is additionally provided on piston
Chamber and sealing block accommodating chamber, the piston upper chamber and sealing block accommodating chamber are located at the opposite sides of the piston, and the piston is also
It is provided with the first subchannel and the second subchannel, wherein to be located at the piston upper chamber corresponding for one end of first subchannel
Bottom wall, the other end of first subchannel are connected with second subchannel, and second subchannel is located at described first
The lower section of subchannel, the piston upper chamber passes sequentially through first subchannel and the second subchannel and the piston exterior connects
Logical, second subchannel includes the port that at least one is located at the second piston body outer wall, the first piston main body
Outer wall and the sub- chamber of the third inner wall between be slidably matched, the first piston main body outer wall and the sub- chamber of the third
Inner wall between be provided with third sealing element, have between the outer wall of the second piston main body and the inner wall of the sub- chamber of the third
A certain distance, first chamber are protected by second subchannel, the first subchannel and second channel and the valve seat epicoele
Hold connection.
9. motor-driven valve according to claim 8, which is characterized in that when the first interface is import, the motor-driven valve
Including full-gear, full off state and first throttle state；
In the full off state, the needle is abutted against with first valve port, and the piston is abutted against with second valve port,
The first interface is not connected to the second interface；
In the first throttle state, first valve port and the third valve port are opened, and second valve port is closed, the valve
The circulation area of the throttling passage formed between needle and first valve port is less than or equal to the sectional area of first valve port, described
First interface passes sequentially through second subchannel, the first subchannel, second channel, the first valve port, first passage, annular flow
It is connected after road, bypass passageways and third chamber with the second interface；
In the full-gear, the needle is opened far from the first valve port, first valve port, and the needle is fully located at
Outside one valve port, the circulation area of the throttling passage formed between the needle and first valve port is greater than in the first throttle
The circulation area of the throttling passage formed between needle and first valve port under state, the piston is far from second valve
Mouthful, second valve port is opened, and the first interface is connected by second valve port with the second interface.
10. motor-driven valve according to claim 9, which is characterized in that when the second interface is import, the motor-driven valve
Including the second throttle, in second throttle, the inner elements of check valve is abutted against with the third valve port, and described
Three valve ports are closed, and the circulation area of the throttling passage formed between the needle and first valve port is less than or equal to described first
The sectional area of valve port, the piston are abutted against with second valve port, and second valve port is closed, and the second interface is successively led to
Cross the third chamber, bypass passageways, annular channel, first passage, the first valve port, second channel, the first subchannel and the second son
It is connected behind channel with the first interface.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710518984.6A CN109210206B (en) | 2017-06-30 | 2017-06-30 | A kind of motor-driven valve |
| US16/624,822 US11156296B2 (en) | 2017-06-30 | 2018-06-11 | Flow control valve |
| PCT/CN2018/090582 WO2019001249A1 (en) | 2017-06-30 | 2018-06-11 | Electric valve |
| JP2019571540A JP7221883B2 (en) | 2017-06-30 | 2018-06-11 | electric valve |
| EP18824369.5A EP3647635B1 (en) | 2017-06-30 | 2018-06-11 | Electric valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710518984.6A CN109210206B (en) | 2017-06-30 | 2017-06-30 | A kind of motor-driven valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109210206A CN109210206A (en) | 2019-01-15 |
| CN109210206B true CN109210206B (en) | 2019-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710518984.6A Active CN109210206B (en) | 2017-06-30 | 2017-06-30 | A kind of motor-driven valve |
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| Country | Link |
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| CN (1) | CN109210206B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659301A (en) * | 2020-12-23 | 2022-06-24 | 法雷奥汽车空调湖北有限公司 | Electronic expansion valve |
| CN117108771B (en) * | 2023-10-18 | 2024-02-06 | 华英阀业有限公司 | Wear-resistant valve device based on valve driving assembly and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2784439A1 (en) * | 1998-10-13 | 2000-04-14 | Peugeot | Electrically operated hydraulic valve for mounting on multiple valve block, comprises operating coil, screwed into block, whose plunger acts on three-way ball valve accommodated in block |
| CN102844601A (en) * | 2010-02-22 | 2012-12-26 | 埃尔比国际有限公司 | An electric valve device |
| CN103912688A (en) * | 2014-04-25 | 2014-07-09 | 邓志强 | Pilot-operated electric valve |
| CN105276199A (en) * | 2014-07-18 | 2016-01-27 | 株式会社鹭宫制作所 | Electric valve |
| CN105822769A (en) * | 2015-01-06 | 2016-08-03 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
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2017
- 2017-06-30 CN CN201710518984.6A patent/CN109210206B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2784439A1 (en) * | 1998-10-13 | 2000-04-14 | Peugeot | Electrically operated hydraulic valve for mounting on multiple valve block, comprises operating coil, screwed into block, whose plunger acts on three-way ball valve accommodated in block |
| CN102844601A (en) * | 2010-02-22 | 2012-12-26 | 埃尔比国际有限公司 | An electric valve device |
| CN103912688A (en) * | 2014-04-25 | 2014-07-09 | 邓志强 | Pilot-operated electric valve |
| CN105276199A (en) * | 2014-07-18 | 2016-01-27 | 株式会社鹭宫制作所 | Electric valve |
| CN105822769A (en) * | 2015-01-06 | 2016-08-03 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
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| CN109210206A (en) | 2019-01-15 |
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