CN205745625U - Electric expansion valve - Google Patents
Electric expansion valve Download PDFInfo
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- CN205745625U CN205745625U CN201620420771.0U CN201620420771U CN205745625U CN 205745625 U CN205745625 U CN 205745625U CN 201620420771 U CN201620420771 U CN 201620420771U CN 205745625 U CN205745625 U CN 205745625U
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- valve
- needle
- noise elimination
- electric expansion
- elimination part
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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
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- Lift Valve (AREA)
Abstract
This utility model provides a kind of electric expansion valve, including: valve body has the first valve port；Needle has closed position and open position, and the bottom of needle has the second valve port, and needle has the first flow channels connected with the second valve port, and the first flow channels is positioned on the sidewall of needle；Valve rod is located in the inside of needle, and valve rod can move up and down to regulate the flow at the second valve port；First noise elimination part is arranged between needle and valve rod and is positioned at the top of the second valve port, so that the fluid from the entrance entrance of the first flow channels flows at the first valve port after the first noise elimination part；Drive division drives valve rod to move up and down, wherein, between valve rod and needle, it is provided with backstopping assembly, so that being synchronized with the movement when needle is contacted by backstopping assembly with valve rod, and when backstopping assembly makes needle be positioned at closed position, valve rod can move up and down relative to needle.The technical solution of the utility model can efficiently solve the problem that in prior art, electric expansion valve noise is big.
Description
Technical field
This utility model relates to refrigerating field, in particular to a kind of electric expansion valve.
Background technology
As it is shown in figure 1, in the prior art, speed reducing electronic expansion valve for frequency conversion air conditioner is mainly made up of two parts, a part
For body portion for Flow-rate adjustment, another part is the coiler part for driving.Its coil part includes: magneto walks
Enter motor 1, have three grades slow down gear reduction units 2, there is the screw thread becoming screw mandrel 3 to move vertically motor convert rotational motion
Auxiliary structure 5, valve body includes the core component compositions such as valve seat 10, and the corrugated tube 7 of control needle 8 lifting.It is described below one
Under the operation principle of above-mentioned electric expansion valve: first, the electronic controller of air conditioning system controls the motor 1 of electric expansion valve
Output shaft rotate, motor 1 rotates with the output shaft of gear reduction unit 2 mating band moving gear decelerator 2, gear reduction unit 2
Output shaft coordinate with screw mandrel, drive screw mandrel rotate, then screw mandrel coordinates with screw thread pair structure 5 so that screw mandrel can on move down
Dynamic.The top of screw mandrel is welded with steel ball 11, and the lower end of steel ball 11 is provided with lining 6, and the lower end of lining 6 connects needle 8.
When screw mandrel driven member drives and moves down, screw mandrel can withstand steel ball 11, and steel ball 11 withstands lining 6, and lining 6 withstands valve
Pin 8 makes needle 8 Tong Bu can move downward until needle 8 is positioned at closed position with screw mandrel, i.e. needle 8 offsets with valve body 10
The position connect.When needle 8 is in the closed position, corrugated tube 7 is in continuous extended state.When applying reverse impulse, silk
Bar 3 moves upward, and needle 8 constantly moves upward under the back stretch and system pressure effect of corrugated tube 7, thus changes valve
The opening degree of mouth 9 so that flow area changes, reaches to control the purpose of the Flow-rate adjustment degree of superheat.
But there is noise problem when real work in above-mentioned electric expansion valve.Specifically, be between valve body and valve port little
During the state of aperture, because at valve port, aperture is less, it will produce substantially throttling.It is very big that coolant flows through valve port flow velocity, result in spy
The vortex determining frequency is formed, thus the abnormal sound created, have impact on the comfort of end user.
Utility model content
Main purpose of the present utility model is to provide a kind of electric expansion valve, to solve electric expansion valve noise of the prior art
Big problem.
To achieve these goals, this utility model provides a kind of electric expansion valve, including: valve body, there is the first valve port；
Needle, has the closed position abutted with the first valve port and dodges the open position of the first valve port, and the bottom of needle has and the
Second valve port of one valve port connection, needle has the first flow channels connected with the second valve port, the entrance of the first flow channels
It is positioned on the sidewall of needle；Valve rod, is at least partly located in the inside of needle, and valve rod can move up and down to regulate the second valve port
The flow at place；First noise elimination part, is arranged between needle and valve rod and is positioned at the top of the second valve port, so that crossing circulation from first
The fluid that the entrance in road enters flows at the first valve port after the first noise elimination part；Drive division, drives valve rod to move up and down, wherein,
Backstopping assembly it is provided with between valve rod and needle, so that being synchronized with the movement when needle is contacted by backstopping assembly with valve rod, and
When backstopping assembly makes needle be positioned at closed position, valve rod can move up and down relative to needle.
Further, electric expansion valve also includes that the second noise elimination part, the second noise elimination part are arranged on the lower section of the second valve port.
Further, the bottom of needle has receiving space, accommodates the lower section being spatially located at the second valve port, accommodates the top in space
Connecting with the second valve port, the bottom accommodating space connects with the first valve port, and the second noise elimination part is contained in receiving space, so that warp
Fluid after crossing the first noise elimination part flows at the first valve port after the second noise elimination part.
Further, the bottom of needle also has communicating passage, and communicating passage is positioned at the outer circumferential of the second valve port and connects first
Flow channels and receiving space.
Further, communicating passage is multiple.
Further, the second noise elimination part includes acoustic element, lower acoustic element and is arranged between acoustic element and lower acoustic element
Branching block, branching block has the second flow channels, and the fluid after upper acoustic element disappears under the second flow channels flows into
Sound part.
Further, the second flow channels is multiple.
Further, it is outer and be positioned at the inside of needle that the first noise elimination part is set in valve rod, the first noise elimination part have tubular noise elimination part and
Ring-type noise elimination part, the middle part of tubular noise elimination part is provided with and dodges hole for dodge valve rod.
Further, the auxiliary section that backstopping assembly includes the back-up ring being arranged on valve rod and is arranged on needle and coordinates with back-up ring.
Further, the axial gap enabling back-up ring to move up and down is formed between needle and the first noise elimination part.
Further, needle includes overcoat, the packing ring being arranged in overcoat and valve seat core, and the first noise elimination part is folded in packing ring and valve
Between seat core, the second valve port and communicating passage are formed on valve seat core, and the first flow channels is arranged on the coat, overcoat and valve seat
Core connects and is synchronized with the movement, and auxiliary section is formed on packing ring, and axial gap is formed in packing ring and/or the first noise elimination part.
Further, overcoat includes the first cylindrical portion and is arranged on bottom the first cylindrical portion to support the first annular flange of valve seat core.
Further, valve seat core include the second cylindrical portion and the second annular flange flange to form the second valve port, overcoat also includes being arranged on
3rd annular flange flange of first annular flange bottom, the second noise elimination part is folded between the second annular flange flange and the 3rd annular flange flange.
Further, packing ring includes the 3rd cylindrical portion and fourth annular flange, and the lower surface of fourth annular flange forms auxiliary section.
Further, on the inwall of overcoat, the position of corresponding first flow channels was provided with stream annular groove.
Further, the first noise elimination part and/or the second noise elimination part are netted noise-reducing structure.
Application the technical solution of the utility model, is provided with backstopping assembly between needle and valve rod, said structure makes needle and valve
It is synchronized with the movement both when bar is contacted by backstopping assembly, and when making needle be positioned at closed position, valve rod can be relative to needle
Move up and down.It addition, application the technical solution of the utility model, the bottom of needle has and connects with the first valve port on valve body
Second valve port, needle has the first flow channels connected with the second valve port.When needle is positioned at open position, a part of fluid
Flowing directly at the first valve port, another part fluid the first flow channels entrance from needle sidewall flows into inside needle, then
Flow at the first valve port after the first noise elimination part noise reduction.In above-mentioned work process, the flow of fluid is relatively big, electric expansion valve
The aperture being dependent between the first valve port and needle is to regulate flow.And when needle is positioned at closed position, and valve rod moves up and down
Time, fluid will flow into inside needle from the first flow channels entrance, flow at the first valve port after being then passed through the first noise elimination part noise reduction.
In above-mentioned work process, the flow of fluid is less, and electric expansion valve relies on the aperture between the second valve port and valve rod to come little
The fluid of flow is adjusted.The low discharge regulation section that said structure makes it easy to produce noise is independent as a unit,
Both achieved the system regulation to low discharge, reduced again owing to being provided with noise produced by low discharge regulation section.Thus solve
The problem that in prior art, electric expansion valve noise is big, and then improve the comfort of user.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing being further appreciated by of the present utility model, of the present utility model
Schematic description and description is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the elevational schematic of electric expansion valve in prior art；
Fig. 2 shows the vertical profile perspective view of the embodiment according to electric expansion valve of the present utility model；
Fig. 3 shows the schematic front view when needle of the electric expansion valve of Fig. 2 is separated with valve port；
Fig. 4 shows the schematic front view when needle of the electric expansion valve of Fig. 2 abuts against with valve port；
Fig. 5 shows enlarged diagram at the A of the electric expansion valve of Fig. 3；
Fig. 6 shows the valve rod of the electric expansion valve of Fig. 3 and the distance relation schematic diagram of the first valve port；
Fig. 7 shows the valve rod of the electric expansion valve of Fig. 2 and the vertical profile perspective view of partial valve needle；
Fig. 8 shows the valve rod of Fig. 7 and the schematic front view of partial valve needle；
Fig. 9 shows the enlarged diagram at the H of the electric expansion valve of Fig. 8；
Figure 10 shows the perspective view of the branching block of Fig. 2；And
Figure 11 shows the schematic front view of the branching block of Figure 10.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
10, valve body；11, the first valve port；20, needle；21, the second valve port；22, the first flow channels；23, communicating passage；
24, overcoat；241, the first cylindrical portion；242, first annular flange；243, the 3rd annular flange flange；244, stream annular groove is crossed；30、
Valve rod；31, back-up ring；40, the first noise elimination part；41, tubular noise elimination part；42, ring-type noise elimination part；50, the second noise elimination part；
51, upper acoustic element；52, lower acoustic element；53, branching block；531, the second flow channels；60, packing ring；61, the 3rd tubular
Portion；62, fourth annular flange；70, valve seat core；71, the second cylindrical portion；72, the second annular flange flange.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As shown in Fig. 2 to Fig. 8, the electric expansion valve of the present embodiment includes valve body 10, needle 20, valve rod the 30, first noise elimination part
40 and drive division.Wherein, valve body 10 has the first valve port 11；Needle 20 has the closed position abutted with the first valve port 11
And dodge the first open position of the first valve port 11, the bottom of needle 20 has the second valve port 21 connected with the first valve port 11,
Having the first flow channels 22 connected with the second valve port 21 on needle 20, the entrance of the first flow channels 22 is positioned at needle 20
Sidewall on；Valve rod 30, is at least partly located in the inside of needle 20, and valve rod 30 can move up and down to regulate described second
Flow at valve port 21；First noise elimination part 40, is arranged between needle 20 and valve rod 30 and is positioned at the top of the second valve port 21,
So that the fluid from the entrance entrance of the first flow channels 22 flows at the first valve port 11 after the first noise elimination part 40；Drive division,
Drive valve rod 30 to move up and down, wherein, between valve rod 30 and needle 20, be provided with backstopping assembly, so that needle 20 and valve rod
30 are synchronized with the movement both during backstopping assembly contact, and when backstopping assembly makes needle 20 be positioned at closed position, valve rod 30 energy
Enough move up and down relative to needle 20.
The technical scheme of application the present embodiment, is provided with backstopping assembly between needle 20 and valve rod 30, and said structure makes valve
Pin 20 is synchronized with the movement when being contacted by backstopping assembly with valve rod 30, and when making needle 20 be positioned at closed position, valve rod
30 can move up and down relative to needle 20.It addition, the technical scheme of application the present embodiment, the bottom of needle 20 has and valve
Second valve port 21 of the first valve port 11 connection on body 10, needle 20 has the first flow channels connected with the second valve port 21
22.When needle 20 is positioned at open position, a part of fluid flows directly at the first valve port 11, and another part fluid is from needle
It is internal that the first flow channels 22 entrance on 20 sidewalls flows into needle 20, flows to first after being then passed through the first noise elimination part 40 noise reduction
At valve port 11.In above-mentioned work process, the flow of fluid is relatively big, and electric expansion valve is dependent on the first valve port 11 and needle
Aperture between 20 regulates flow.And be positioned at closed position when needle 20, when valve rod 30 moves up and down, fluid will only from
It is internal that the entrance of the first flow channels 22 flows into needle 20, flows to the first valve port 11 after being then passed through the first noise elimination part 40 noise reduction
Place.In above-mentioned work process, the flow of fluid is less, and electric expansion valve relies between the second valve port 21 and valve rod 30
The fluid of low discharge is adjusted by aperture.Said structure makes it easy to produce the low discharge regulation independent conduct of section of noise
One unit, had both achieved the system regulation to low discharge, reduced again owing to being provided with noise produced by low discharge regulation section.
Thus solve the problem that in prior art, electric expansion valve noise is big.
Specifically, when valve rod 30 driven part drives and moves down, needle 20 is due to himself gravity and by difference force
Reason can contact with backstopping assembly.The structure of above-mentioned backstopping assembly make needle 20 can with valve rod 30 in this condition with
Step motion, till needle 20 is positioned at closed position.When needle 20 is positioned at closed position, needle 20 starts and stopper section
Part is separated, and now valve rod 30 can move downward relative to needle 20.When valve rod 30 driven part is driven up mobile,
Valve rod 30 can move relative in needle 20 phase, until needle 20 contacts with backstopping assembly.When needle 20 and stopper section
During part contact, valve rod 30 starts to drive needle 20 together to move upward.When motor leaves to standard-sized sheet pulse, electric expansion valve is whole
Body reaches full-gear.
It should be noted that the first flow channels 22 can be multiple, multiple first flow channels 22 are positioned at the first noise elimination part 40
Outer circumferential.The number of above-mentioned first flow channels 22 can be adjusted according to system requirements.
Also, it should be noted the front end of valve rod 30 is needle columnar structure.
For reducing noise produced by low discharge regulation section further, as it is shown in figure 5, in the present embodiment, electric expansion valve is also
Including the second noise elimination part 50, the second noise elimination part 50 is arranged on the lower section of the second valve port 21.Specifically, from the first flow channels 22
Entrance flows into fluid within needle 20 will sequentially pass through the first noise elimination part 40 and the second noise elimination part 50 carries out noise reduction, and finally
Enter at the first valve port 11.Said structure makes the fluid noise reduction again after the first noise elimination part 40 noise reduction, thus further
Reduce noise, and then improve the comfort of user.
As shown in Fig. 3 to Fig. 7, in the present embodiment, the bottom of needle 20 has receiving space, accommodates and is spatially located at the second valve
The lower section of mouth 21, the top accommodating space connects with the second valve port 21, and the bottom accommodating space connects with the first valve port 11, the
Two noise elimination part 50 are contained in receiving space.On the one hand said structure makes the second noise elimination part 50 have stable operating position,
Thus ensure the working effect of the second noise elimination part 50, on the other hand the fluid after the first noise elimination part 40 can be entered
Second noise elimination part 50 carries out abundant noise reduction, thus reaches create a further reduction the purpose of noise, and the use improving user is comfortable
Degree.
As shown in Fig. 3 to Fig. 7, in the present embodiment, the bottom of needle 20 also has communicating passage 23, communicating passage 23
In the outer circumferential of the second valve port 21 and connect the first flow channels 22 and accommodate space.Specifically, it is positioned at closedown when needle 20
Position, when valve rod 30 and the second valve port 21 abut against, enters the fluid of the first flow channels 22 before this by the first noise elimination part 40
Carry out noise reduction, then flow into above-mentioned communicating passage 23.Owing to communicating passage 23 connects the first flow channels 22 and accommodates space, because of
This fluid flowing into communicating passage 23 continues to flow into and accommodates in space, and carries out abundant noise reduction in entering the second noise elimination part 50,
Final outflow at the first valve port 11.On the one hand said structure can be capable of the low discharge output required by system, the opposing party
Face fully can carry out noise reduction by convection cell, thus solves electric expansion valve of the prior art low discharge scope in the early stage further
The problem that can produce abnormal sound during interior regulation, improves the comfort level of user.
It should be noted that the resistance area of communicating passage 23 is bigger relative to the resistance area of the second valve port 21, therefore fluid is easier to
Flow out at the second valve port 21.
Certainly, in other embodiments the most unshowned, above-mentioned communicating passage 23 can also be multiple.People in the art
Member is it is to be understood that the number of communicating passage 23 rationally can be arranged by the flow that system is required when valve cuts out, to reduce
During actually used demand, the regulation of the valve opening pulse point of electric expansion valve needs.Certainly, the channel radius of above-mentioned communicating passage 23 is also
Can be adjusted according to actual needs.
As shown in Fig. 5 to Figure 11, in the present embodiment, the second noise elimination part 50 include acoustic element 51, lower acoustic element 52 and
It is arranged on the branching block 53 between acoustic element 51 and lower acoustic element 52.Said structure make fluid will through multiple acoustic element,
Fully to break up above-mentioned fluid, eliminate the similar sound vortex that screams, thus realize reducing the purpose of noise.In the present embodiment,
Having the second flow channels 531 on branching block 53, the fluid after upper acoustic element 51 flows into through the second flow channels 531
Lower acoustic element 52.Said structure makes the fluid will be again by branching block during upper acoustic element 51 flows to lower acoustic element 52
Effect, defines the repeatedly utilization to acoustic element.Under equal conditions, utilizing said structure to carry out noise reduction can be sharp more fully
With acoustic element, and can more efficiently eliminate the vortex producing abnormal sound, thus reach to reduce further the purpose of noise.
Specifically, owing to branching block 53 is arranged on the lower section of upper acoustic element 51, therefore, when fluid is from communicating passage 23 enters
After acoustic element 51, fluid continues to descending until encountering branching block 53.As it is shown in figure 5, a part of fluid will be directed into point
The second flow channels 531 in stream block 53 flows into lower acoustic element 52, and another part fluid is split the entity part of block 53 and keeps off back,
Thus be again introduced into acoustic element 51 and carry out noise reduction, till fluid enters the second flow channels 531.
Certainly, as shown in Figure 10 and Figure 11, above-mentioned second flow channels 531 can also be set to many according to the needs of system requirements
Individual.
As shown in Fig. 3 to Fig. 7, in the present embodiment, to be set in valve rod 30 outer and be positioned at needle 20 for the first noise elimination part 40
Portion, the first noise elimination part 40 has tubular noise elimination part 41 and ring-type noise elimination part 42, and the middle part of tubular noise elimination part 41 is provided with for keeping away
Allow valve rod 30 dodges hole.
As shown in Fig. 3 to Fig. 7, in the present embodiment, backstopping assembly includes the back-up ring 31 being arranged on valve rod 30, needle 20
On be provided with the auxiliary section coordinated with back-up ring 31.Said structure is simple, and said structure can effectively limit valve rod 30 to
The limiting length of top offset.Certainly, this example and technical staff are it is to be understood that backstopping assembly can also be for the gear being arranged on needle
Circle, valve rod is provided with the cooperation recess coordinated with back-up ring.
As shown in Figures 3 to 8, in the present embodiment, axial gap is formed between needle 20 and the first noise elimination part 40.Above-mentioned
Simple in construction, and said structure enables to back-up ring 31 and moves up and down in axial gap, it is achieved thereby that when needle 20 is positioned at
During closed position, valve rod 30 and needle 20 can the purposes of relative movement.
As shown in Figures 3 to 8, in the present embodiment, needle 20 include overcoat 24, the packing ring 60 that is arranged in overcoat 24 and
Valve seat core 70, the first noise elimination part 40 is folded between packing ring 60 and valve seat core 70, and the second valve port 21 and communicating passage 23 are formed
On valve seat core 70, the first flow channels 22 is arranged on overcoat 24, and overcoat 24 is connected with valve seat core 70 and is synchronized with the movement,
Auxiliary section is formed on packing ring 60, and axial gap is formed in packing ring 60 and/or the first noise elimination part 40.Said structure is simple, easily
In assembling.It should be noted that above-mentioned packing ring 60 is fixing with overcoat 24 to be connected.
Also, it should be noted the stroke L1 before the upper surface of back-up ring 31 contacts with the lower surface of packing ring 60 is that low discharge regulates section,
Distance between B point on valve rod in i.e. Fig. 9 and the C point on valve seat core 70 is (when valve rod 30 blocks on the second valve port 21
Time B point overlap with C point).Above-mentioned L1 length is less, and the aperture at the i.e. second valve port 21 is little, can produce significantly throttling.Cause
This, in the present embodiment, the second noise elimination part 50 is arranged on the lower section of the second valve port 21, and said structure can reduce due to substantially
Throttling and the abnormal sound that produces, improve the comfort of user.
Also, it should be noted the stroke L2 that valve rod 30 band washer 60 moves is big Flow-rate adjustment section, i.e. needle in Fig. 6
Distance (D point overlaps with E point when needle 20 is positioned at closed position) between D point and the E point on valve body 10 on 20.
As shown in Figures 3 to 8, in the present embodiment, overcoat 24 includes the first cylindrical portion 241 and is arranged on the first cylindrical portion 241
Bottom is to support the first annular flange 242 of valve seat core 70.Said structure is simple, be easily assembled.
As shown in Figures 3 to 8, in the present embodiment, valve seat core 70 include the second cylindrical portion 71 and the second annular flange flange 72 with
Forming the second valve port 21, overcoat 24 also includes being arranged on the 3rd annular flange flange 243 bottom first annular flange 242, and second disappears
Line 50 is folded between the second annular flange flange 72 and the 3rd annular flange flange 243.Said structure is simple, be easily assembled.
As shown in Figures 3 to 8, in the present embodiment, packing ring 60 includes the 3rd cylindrical portion 61 and fourth annular flange 62, the
The lower surface of four annular flange flange 62 forms auxiliary section.Said structure is simple, be easily assembled and process.It should be noted that the 3rd
Fix between the outer surface of cylindrical portion 61 and the inner surface of overcoat 24 and be connected.
As shown in Figures 3 to 8, in the present embodiment, on the inwall of overcoat 24, the position of corresponding first flow channels 22 is arranged
There is stream annular groove 244.Said structure increases the contact surface between the fluid and the first noise elimination part 40 of the first flow channels 22
Long-pending such that it is able to more fully to utilize the first noise elimination part 40 convection cell to carry out noise reduction.
As shown in Figures 3 to 8, in the present embodiment, the first noise elimination part 40 and/or the second noise elimination part 50 are preferably netted noise reduction
Structure.Fluid through netted noise-reducing structure can be stirred scattered by said structure, and makes eddy current, bubble that internal fluid produces
Rupture produced abnormal sound to be eliminated.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this area
For technical staff, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, institute
Any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (16)
1. an electric expansion valve, it is characterised in that including:
Valve body (10), has the first valve port (11)；
Needle (20), has the closed position abutted with described first valve port (11) and dodges described first valve port (11)
Open position, the bottom of described needle (20) has the second valve port (21) connected with described first valve port (11),
Having the first flow channels (22) connected with described second valve port (21) on described needle (20), described first crosses stream
The entrance of passage (22) is positioned on the sidewall of described needle (20)；
Valve rod (30), is at least partly located in the inside of described needle (20), and described valve rod (30) can move up and down
To regulate the flow at described second valve port (21) place；
First noise elimination part (40), is arranged between described needle (20) and described valve rod (30) and is positioned at described second valve
The top of mouth (21), so that from the fluid of the entrance entrance of described first flow channels (22) through described first noise reduction
Described first valve port (11) place is flowed to behind portion (40)；
Drive division, drives described valve rod (30) to move up and down,
Wherein, between described valve rod (30) and described needle (20), it is provided with backstopping assembly, so that described needle (20)
It is synchronized with the movement when being contacted by described backstopping assembly with described valve rod (30), and described backstopping assembly makes described valve
When pin (20) is positioned at described closed position, described valve rod (30) can move up and down relative to described needle (20).
Electric expansion valve the most according to claim 1, it is characterised in that described electric expansion valve also includes the second noise elimination part (50),
Described second noise elimination part (50) is arranged on the lower section of described second valve port (21).
Electric expansion valve the most according to claim 2, it is characterised in that the bottom of described needle (20) has receiving space,
Described receiving is spatially located at the lower section of described second valve port (21), the top in described receiving space and described second valve port (21)
Connection, the bottom in described receiving space connects with described first valve port (11), and described second noise elimination part (50) is contained in institute
State in receiving space, so that the fluid after described first noise elimination part (40) is through described second noise elimination part (50)
After flow to described first valve port (11) place.
Electric expansion valve the most according to claim 3, it is characterised in that it is logical that the bottom of described needle (20) also has connection
Road (23), described communicating passage (23) is positioned at the outer circumferential of described second valve port (21) and connects described first mistake stream
Passage (22) and described receiving space.
Electric expansion valve the most according to claim 4, it is characterised in that described communicating passage (23) is multiple.
Electric expansion valve the most according to claim 2, it is characterised in that described second noise elimination part (50) includes acoustic element
(51), lower acoustic element (52) and be arranged between described upper acoustic element (51) and described lower acoustic element (52) point
Stream block (53), described branching block (53) has the second flow channels (531), through described upper acoustic element (51) it
After fluid flow into described lower acoustic element (52) through described second flow channels (531).
Electric expansion valve the most according to claim 6, it is characterised in that described second flow channels (531) is multiple.
Electric expansion valve the most according to claim 1, it is characterised in that described first noise elimination part (40) is set in described valve
Bar (30) outward and is positioned at the inside of described needle (20), and described first noise elimination part (40) has tubular noise elimination part (41)
With ring-type noise elimination part (42), the middle part of described tubular noise elimination part (41) is provided with for dodging keeping away of described valve rod (30)
Allow hole.
Electric expansion valve the most according to claim 4, it is characterised in that described backstopping assembly includes being arranged on described valve rod (30)
On back-up ring (31) and be arranged on the auxiliary section that described needle (20) is upper and coordinates with described back-up ring (31).
Electric expansion valve the most according to claim 9, it is characterised in that described needle (20) and described first noise elimination part (40)
Between formed and make the axial gap that described back-up ring (31) can move up and down.
11. electric expansion valves according to claim 10, it is characterised in that described needle (20) includes overcoat (24), sets
Putting the packing ring (60) in described overcoat (24) and valve seat core (70), described first noise elimination part (40) is folded in described
Between packing ring (60) and described valve seat core (70), described second valve port (21) and described communicating passage (23) are formed
On described valve seat core (70), described first flow channels (22) is arranged on described overcoat (24), described overcoat
(24) being connected with described valve seat core (70) and be synchronized with the movement, described auxiliary section is formed on described packing ring (60), institute
State axial gap to be formed in described packing ring (60) and/or described first noise elimination part (40).
12. electric expansion valves according to claim 11, it is characterised in that described overcoat (24) includes the first cylindrical portion (241)
And it is arranged on described first cylindrical portion (241) bottom to support the first annular flange (242) of described valve seat core (70).
13. electric expansion valves according to claim 12, it is characterised in that described valve seat core (70) includes the second cylindrical portion (71)
With the second annular flange flange (72) to form described second valve port (21), described overcoat (24) also includes being arranged on described
3rd annular flange flange (243) of one annular flange flange (242) bottom, described second noise elimination part (50) is folded in described second
Between annular flange flange (72) and described 3rd annular flange flange (243).
14. electric expansion valves according to claim 11, it is characterised in that described packing ring (60) includes the 3rd cylindrical portion (61)
With fourth annular flange (62), the lower surface of described fourth annular flange (62) forms described auxiliary section.
15. electric expansion valves according to claim 11, it is characterised in that on the inwall of described overcoat (24) corresponding described the
The position of one flow channels (22) was provided with stream annular groove (244).
16. electric expansion valves according to claim 2, it is characterised in that described first noise elimination part (40) and/or described second
Noise elimination part (50) is netted noise-reducing structure.
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| WO2017101878A1 (en) * | 2015-12-19 | 2017-06-22 | 浙江三花智能控制股份有限公司 | Two-section electronic expansion valve |
| CN108119697A (en) * | 2016-11-28 | 2018-06-05 | 浙江三花智能控制股份有限公司 | Electric expansion valve and with its refrigeration system |
| CN108931068A (en) * | 2017-05-23 | 2018-12-04 | 浙江三花智能控制股份有限公司 | Air-conditioning system, heating dehumanization method, heating method and refrigerating method |
| CN109425150A (en) * | 2017-08-30 | 2019-03-05 | 浙江三花智能控制股份有限公司 | Electric expansion valve and refrigeration system with it |
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| CN108931068A (en) * | 2017-05-23 | 2018-12-04 | 浙江三花智能控制股份有限公司 | Air-conditioning system, heating dehumanization method, heating method and refrigerating method |
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| EP3792529A4 (en) * | 2018-05-08 | 2022-02-23 | Emerson Climate Technologies (Suzhou) Co., Ltd. | Valve needle assembly and electronic expansion valve having the valve needle assembly |
| US11846455B2 (en) | 2018-05-08 | 2023-12-19 | Copeland Climate Technologies (Suzhou) Co., Ltd. | Valve needle assembly and electronic expansion valve having the valve needle assembly |
| CN112146313A (en) * | 2019-06-28 | 2020-12-29 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| WO2020259657A1 (en) * | 2019-06-28 | 2020-12-30 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
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Address after: 219 No. 312500 Zhejiang city of Shaoxing province Xinchang County Meizhu town WOSI Avenue Patentee after: Zhejiang three flower intelligent control Limited by Share Ltd Address before: 219 No. 312500 Zhejiang city of Shaoxing province Xinchang County Meizhu town WOSI Avenue Patentee before: Zhejiang Sanhua Group Co., Ltd. |