CN109425151A - Electric expansion valve and refrigeration system with it - Google Patents
Electric expansion valve and refrigeration system with it Download PDFInfo
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- CN109425151A CN109425151A CN201710765443.3A CN201710765443A CN109425151A CN 109425151 A CN109425151 A CN 109425151A CN 201710765443 A CN201710765443 A CN 201710765443A CN 109425151 A CN109425151 A CN 109425151A
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- electric expansion
- noise
- expansion valve
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 10
- 239000012530 fluid Substances 0.000 claims abstract description 60
- 230000004308 accommodation Effects 0.000 claims abstract description 41
- 230000009467 reduction Effects 0.000 claims description 25
- 230000008030 elimination Effects 0.000 claims description 20
- 238000003379 elimination reaction Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 230000005484 gravity Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 240000001973 Ficus microcarpa Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Lift Valve (AREA)
Abstract
The present invention provides a kind of electric expansion valve and with its refrigeration system.Wherein, electric expansion valve includes: valve body；Needle, with closed position and open position, the bottom of needle has the second valve port, needle has accommodation space, the first flow channels and the second flow channels, first flow channels are located on the side wall of needle and are in communication with the outside, and the second flow channels are located at the outer circumferential of the second valve port and are connected to the second valve port；Valve rod can be moved up and down to adjust the flow at the second valve port；Driving portion, driving stem move up and down；Elastic element, setting in needle and are being supported between needle and valve rod, and when valve rod is moved up relative to needle, and fluid flows into accommodation space from the first valve port, elastic element applies elastic force so that needle is connected at the first valve port to needle.The problem of the small flow regulating effect difference of electric expansion valve in the prior art can be efficiently solved by applying the technical scheme of the present invention.
Description
Technical field
The present invention relates to refrigerating fields, in particular to a kind of electric expansion valve and with its refrigeration system.
Background technique
As shown in Figure 1, in the prior art, speed reducing electronic expansion valve for frequency conversion air conditioner mainly consists of two parts, one
Part is that body portion is adjusted for flow, and another part is the coiler part for driving.Its coil part includes: permanent magnetism
Formula stepper motor, with three-level slow down gear reduction unit, with by motor rotary motion be converted to screw rod vertical movement spiral shell
Line auxiliary structure.Body portion include valve seat 1, valve rod 8, needle 2, the backstopping assembly 3 being arranged between valve rod 8 and needle 2 and
Controlling the bellows 7 that needle 2 is gone up and down waits core components to constitute.It is provided with the first valve port 4 on valve seat 1, needle 2, which has, is connected to the
The open position of the first valve port 4 of closed position and opening on one valve port 4.Needle 2 is contacted with valve rod 8 by backstopping assembly 3
When both move synchronously, when needle 2 is located at closed position, valve rod 8 can move up and down relative to needle 2.It is arranged on needle 2
There are the second valve port 5 being connected to the first valve port 4 and flow channels 9.Several work shapes of electric expansion valve are described below
State: when needle 2 is located at open position, electric expansion valve is in the state of standard-sized sheet.When needle 2 is located at closed position, and valve rod 8
When being connected on the second valve port 5, fluid can only enter needle 2 or outflow needle 2 by circulation road 9, therefore at electric expansion valve
In the state of the small flow of fixation (flow has the size of flow channels to determine).When needing to carry out the adjusting of small flow, valve rod 8 is in wave
It is moved up under the action of the 7 of line pipe, uninterrupted is changed by the mobile formation of regulating valve stem 8, to realize small flow
Adjusting.When valve rod 8 is moved to predetermined position, the backstopping assembly 3 being arranged on valve rod 8 is contacted with needle 2, drives needle 2
It is mobile to the direction far from the first valve port 4, realize that big flow is adjusted.Therefore, during small flow is adjusted, needle 2 should
Always it is connected on the first valve port 4.But when needing small flow to adjust, and fluid is from N to when entering the first valve port 4, due to pressure
The effect of the upward pushing tow of power difference, needle 2 may shift to an earlier date to the direction movement far from the first valve port 4, so that small flow
Regulating effect is poor, and flow adjusts inaccurate.
Summary of the invention
The main purpose of the present invention is to provide a kind of electric expansion valve and with its refrigeration system, to solve existing skill
The problem of the small flow regulating effect difference of electric expansion valve in art.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of electric expansion valve, comprising: valve body,
With the first valve port；Needle has the closed position abutted with the first valve port and avoids the open position of the first valve port, needle
Bottom there is the second valve port for be connected to the first valve port, needle is with accommodation space and the first mistake being connected to accommodation space
Circulation road and the second flow channels, the first flow channels are located on the side wall of needle and are in communication with the outside, the second flow channels position
In the second valve port outer circumferential and be connected to the second valve port；Valve rod is at least partly threaded through in accommodation space, valve rod can on
Lower movement is to adjust the flow at the second valve port；Driving portion, driving stem move up and down, wherein are arranged between valve rod and needle
There is backstopping assembly, so as to move synchronously both when needle and valve rod are contacted by backstopping assembly, and when needle is located at close stance
When setting, valve rod can move up and down relative to needle；Elastic element, setting in needle and are being supported between needle and valve rod,
When valve rod is moved down relative to needle, elastic element is compressed, when valve rod is moved up relative to needle, and fluid from
When first valve port flows into accommodation space, elastic element applies elastic force so that needle is connected at the first valve port to needle.
Further, elastic element is spring, and spring is set on valve rod, on valve rod have cascaded surface, the first of spring
End is abutted with cascaded surface, and the second end of spring is connected on needle.
Further, needle includes needle ontology and is arranged in the intrinsic valve seat core of needle, the second valve port and second
Flow channels are arranged on valve seat core, and the second end of spring is connected on valve seat core.
Further, electric expansion valve further include: valve needle cover is fixed at the top of needle ontology, sets on valve needle cover
The first avoid holes of evacuation valve rod are equipped with, the inner wall of needle ontology, the lower surface of valve needle cover are enclosed jointly with the upper surface of valve seat core
At accommodation space.
Further, electric expansion valve further include: the first noise elimination part is arranged in accommodation space, and the first noise elimination part includes
First noise-reducing structure and the second noise-reducing structure, the first noise-reducing structure are located at the top of the second noise-reducing structure, the first noise-reducing structure
The first flow channels are blocked, the second noise-reducing structure blocks the second flow channels, and the second end of spring is supported by the second noise-reducing structure
It connects on valve seat core.
Further, electric expansion valve further include: sealing is arranged between the first noise-reducing structure and the second noise-reducing structure
To separate the first noise-reducing structure and the second noise-reducing structure.
Further, sealing is sealing ring, has the second avoid holes of evacuation valve rod, the circumferential direction of sealing on sealing ring
Side wall is bonded with the inner wall of needle ontology.
Further, electric expansion valve further include: the lower section of the second valve port is arranged in the second noise elimination part, the second noise elimination part,
And block the second valve port and the second flow channels.
Further, the decrement of elastic element is less than or equal to the valve rod stroke mobile relative to needle.
According to another aspect of the present invention, a kind of refrigeration system is provided, comprising: electric expansion valve, electric expansion valve are
Above-mentioned electric expansion valve.
It applies the technical scheme of the present invention, electric expansion valve includes the elastic element being arranged between needle and valve rod.When
When valve rod is moved down relative to needle, elastic element can be compressed.When valve rod is moved up relative to needle, and fluid from
When first valve port flows into accommodation space, elastic element applies elastic force so that needle is connected at the first valve port to needle.Until
When valve rod is contacted by backstopping assembly and needle, needle is just moved up with valve rod together, and the first valve port is opened.Above-mentioned small
During flow is adjusted, pressure that direction and the fluid for the elastic force that elastic element applies to needle generate it is contrary,
Therefore pressure caused by fluid can be offset, the gravity for enabling needle to lean on itself blocks at the first valve port.Therefore work as valve
Bar is moved up relative to needle, and fluid from the first valve port flow into accommodation space when, needle will not leave the first valve in advance
Mouthful, so that the adjusting of flow is more accurate, solve asking for the small flow regulating effect difference of electric expansion valve in the prior art
Topic.It is easier to assemble in addition, being arranged elastic element in needle, to improve assembly efficiency.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the partial vertical sectional structural schematic diagram of electric expansion valve in the prior art；
Vertical profile structure when the second valve port is avoided Fig. 2 shows the valve rod of the embodiment of electric expansion valve according to the present invention
Schematic diagram；
Fig. 3 shows the enlarged structure schematic diagram at the A of the electric expansion valve of Fig. 2；
The valve rod that Fig. 4 shows Fig. 2 blocks vertical profile structural schematic diagram when the second valve port；
Fig. 5 shows the enlarged structure schematic diagram at the B of the electric expansion valve of Fig. 4；
Broken section structure when the valve rod and needle that Fig. 6 shows the electric expansion valve of Fig. 2 are cooperated by backstopping assembly
Schematic diagram；
The valve rod that Fig. 7 shows the electric expansion valve of Fig. 2 is moved downwardly broken section structure when L1 relative to needle
Schematic diagram；And
Fig. 8 shows the schematic perspective view of the elastic element of the electric expansion valve of Fig. 2.
Wherein, the above drawings include the following reference numerals:
10, valve body；11, the first valve port；20, needle；21, needle ontology；211, the first flow channels；22, valve seat core；
221, the second valve port；222, the second flow channels；23, accommodation space；30, valve rod；31, cascaded surface；40, the first noise elimination part；41,
First noise-reducing structure；42, the second noise-reducing structure；60, sealing；70, the second noise elimination part；80, driving portion；90, backstopping assembly；
100, elastic element；120, bellows；140, valve needle cover；150, first pipe；160, second pipe.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figures 2 to 5, the electric expansion valve of the present embodiment includes: valve body 10, needle 20, valve rod 30, driving portion 80
And elastic element 100.Wherein, valve body 10 has the first valve port 11.Needle 20 has the close stance abutted with the first valve port 11
The open position of the first valve port 11 is set and avoids, the bottom of needle 20 has the second valve port 221 being connected to the first valve port 11,
The first flow channels 211 and the second flow channels 222 that needle 20 has accommodation space 23 and is connected to accommodation space 23, the
One flow channels 211 are located on the side wall of needle 20 and are in communication with the outside, and the second flow channels 222 are located at the second valve port 221
Outer circumferential is simultaneously connected to the second valve port 221.At least partly valve rod 30 is threaded through in accommodation space 23, valve rod 30 can on move down
The dynamic flow at the second valve port 221 of adjusting.80 driving stem 30 of driving portion moves up and down, wherein valve rod 30 and needle 20 it
Between be provided with backstopping assembly 90, so as to be moved synchronously both when needle 20 and valve rod 30 are contacted by backstopping assembly 90, and work as
When needle 20 is located at closed position, valve rod 30 can move up and down relative to needle 20.Elastic element 100 is arranged in needle 20
And support between needle 20 and valve rod 30, when valve rod 30 is moved down relative to needle 20, elastic element 100 is compressed,
When valve rod 30 is moved up relative to needle 20, and fluid flows into accommodation space 23 from the first valve port 11, elastic element 100
Apply elastic force so that needle 20 is connected at the first valve port 11 to needle 20.
Using the technical solution of the present embodiment, electric expansion valve includes the elasticity member being arranged between needle 20 and valve rod 30
Part 100.When valve rod 30 is moved down relative to needle 20, elastic element 100 can be compressed.When valve rod 30 is relative to needle 20
Move up, and fluid from the first valve port 11 flow into accommodation space 23 when, elastic element 100 to needle 20 apply elastic force with
It is connected to needle 20 at first valve port 11.Until 20 ability of needle is with valve when valve rod 30 is contacted by backstopping assembly and needle 20
Bar 30 moves up together, and the first valve port 11 is opened.During above-mentioned small flow is adjusted, elastic element 100 is to needle
The pressure that direction and the fluid of 20 elastic forces applied generate it is contrary, therefore pressure caused by fluid can be offset,
The gravity for enabling needle 20 to lean on itself blocks at the first valve port 11.Therefore when valve rod 30 is moved up relative to needle 20,
And when fluid flows into accommodation space 23 from the first valve port 11, needle 20 will not leave the first valve port 11 in advance, so that flow
It adjusts more accurate, solves the problems, such as that the small flow regulating effect of electric expansion valve in the prior art is poor.In addition, by elastic
Element 100, which is arranged in needle 20, to be easier to assemble, to improve assembly efficiency.
It should be noted that in the present embodiment, electric expansion valve further includes first pipe 150 and second pipe 160,
First pipe is connected to by the first valve port 11 with accommodation space 23, and second pipe 160 is connected to accommodation space 23.
Full-gear, big flow adjustment state, small flow adjustment state and fixed small flow status is described below:
Full-gear: when needle 20 opens the first valve port 11 and is greater than preset distance with the distance between the first valve port 11
When, at this point, the fluid flow flowed out from electric expansion valve is larger, and the movement of needle 20 is minimum for the flow effect of fluid.
Above-mentioned state is full-gear.When electric expansion valve is shown in a fully open operation, most of fluid is directly entered to valve body 10,
Then it is flowed out from pipeline, few segment fluid flow is flowed out from pipeline again after entering in accommodation space 23.
Big flow adjustment state: when needle 20 opens the first valve port 11 and is less than with the distance between the first valve port 11 predetermined
Apart from when, the movement of needle 20 is larger for the flow effect of fluid.Above-mentioned state is big flow adjustment state.When electronics is swollen
When swollen valve is in big flow adjustment state, a part of fluid is directly entered to valve body 10, is then flowed out from pipeline, another portion
Shunting body is flowed out from pipeline again after entering in accommodation space 23.
Small flow adjustment state: when needle 20 is connected at the first valve port 11, and valve rod 30 is not connected to the second valve port 221
When, the fluid flow flowed out from electric expansion valve is smaller, and the movement of valve rod 30 more can accurately adjust fluid flow.It is above-mentioned
State is small flow adjustment state.When electric expansion valve is in small flow adjustment state, a part of fluid passes through the second valve
Mouth 221 is flowed out from pipeline again after entering in accommodation space 23, and another part fluid enters receiving by the second flow channels 222
It is flowed out from pipeline again after in space 23.
Fixed small flow status: when needle 20 is connected at the first valve port 11, and valve rod 30 is connected to the second valve port 221
When.The fluid flow flowed out from electric expansion valve is smaller, and is fixed value.Above-mentioned state is fixed small flow status.Work as electricity
When sub- expansion valve is in fixed small flow status, whole fluids pass through after the second flow channels 222 enter in accommodation space 23 again
It is flowed out from pipeline.
In the following, simply introducing the course of work of electric expansion valve:
(1), fluid enters accommodation space 23 from first pipe 150:
Electric expansion valve fixes small flow status from full-gear variation:
Firstly, 80 driving stem 30 of driving portion moves down, needle 20 under gravity by backstopping assembly 90 with
Valve rod 30, which synchronizes, to be moved downward.When needle 20 is connected to the first valve port 11, valve rod 30 continues to move down, at this point, elasticity member
Part 100 is compressed, and needle 20 is crushed at the first valve port 11 under the action of its gravity and elastic force.When valve rod 30 is connected to
When the second valve port 221, electric expansion valve reaches the state of fixed small flow.At this point, elastic element 100 is in maximum compression shape
State, the upward elastic force of elastic element 100 is less than the resultant force that driving portion 80 exports, so that valve rod 30 is able to maintain in abutted position
(position for being connected to the second valve port 221).When electric expansion valve is in fixed small flow status, fluid successively flows into the first valve
Mouth the 11, second flow channels 222, accommodation space 23, the first flow channels 211, finally flow out from second pipe 160.
It is state full-gear that electric expansion valve changes from the small flow shape of fixation:
Firstly, 80 driving stem 30 of driving portion moves up, before backstopping assembly 90 is contacted with needle 20, needle 20 is same
When effect by gravity and elastic force, wherein elastic force can offset difference force upward caused by fluid.Therefore, exist
Before backstopping assembly 90 is contacted with needle 20, needle 20 can be firmly pressed against at the first valve port 11, so that electric expansion valve
Small flow adjust it is more accurate.When backstopping assembly 90 and needle 20 contact, needle 20 is hooked on only under gravity
On stopper part 90, to be move upwardly until that needle 20 is moved upward to together predetermined by 90 valve needle 20 of backstopping assembly for valve rod 30
Until position.
(2), fluid enters accommodation space 23 from second pipe 160:
Electric expansion valve fixes small flow status from full-gear variation:
Firstly, 80 driving stem 30 of driving portion moves down, needle 20 under gravity by backstopping assembly 90 with
Valve rod 30, which synchronizes, to be moved downward.When needle 20 is connected to the first valve port 11, valve rod 30 continues to move down, at this point, elasticity member
Part 100 is compressed, and the elastic force of difference force and elastic element 100 that fluid generates is offset, and needle 20 is in the presence of its gravity
It is crushed at the first valve port 11, does not need the power output for additionally increasing driving portion 80.When valve rod 30 is connected to the second valve port 221
When, electric expansion valve reaches the state of fixed small flow.When electric expansion valve is in fixed small flow status, fluid successively flows
Enter the first flow channels 211, accommodation space 23, the second flow channels 222, the first valve port 11, is finally flowed from first pipe 150
Out.
It is state full-gear that electric expansion valve changes from the small flow shape of fixation:
Firstly, 80 driving stem 30 of driving portion moves up, before backstopping assembly 90 is contacted with needle 20, needle 20 is same
When the effect of difference force that is generated by gravity, the elastic force of elastic element 100 and fluid be crushed at the first valve port 11.Cause
This, before backstopping assembly 90 is contacted with needle 20, needle 20 can be firmly pressed against at the first valve port 11, so that electronics is swollen
The small flow of swollen valve adjusts more accurate.When backstopping assembly 90 and needle 20 contact, needle 20 hooks under gravity
On backstopping assembly 90, valve rod 30 is move upwardly until that needle 20 is moved upward to by 90 valve needle 20 of backstopping assembly together
Until predetermined position.
As shown in Fig. 2 to Fig. 5 and Fig. 8, in the present embodiment, elastic element 100 is spring, and spring is set in valve rod 30
On, there is cascaded surface 31, the first end of spring is abutted with cascaded surface 31, and the second end of spring is connected to needle 20 on valve rod 30
On.Preferably, in the present embodiment, valve rod 30 includes the first shell of column interconnected and the second shell of column, wherein the first shell of column
Positioned at the top of the second shell of column, and the diameter of the first shell of column is greater than the diameter of the second shell of column.The company of first shell of column and the second shell of column
The place of connecing forms cascaded surface 31.Above structure is simple, easy to process and assembly.When assembly, spring need to be only set in the second shell of column
On, and abut the first end of spring with cascaded surface 31.
As shown in Figure 3 and Figure 5, in the present embodiment, needle 20 includes needle ontology 21 and is arranged in needle ontology 21
Interior valve seat core 22, the second valve port 221 and the second flow channels 222 are arranged on valve seat core 22, and the second end of spring abuts
On valve seat core 22.Above structure is simple, easy to process.
As shown in Figure 3 and Figure 5, in the present embodiment, electric expansion valve further includes valve needle cover 140.The fixation of valve needle cover 140 is set
Set be provided on the top of needle ontology 21, valve needle cover 140 evacuation valve rod 30 the first avoid holes, needle ontology 21 it is interior
Wall, the lower surface of valve needle cover 140 and the upper surface of valve seat core 22 surround accommodation space 23 jointly.Above structure is simple, is easy to fill
Match.
Since the small flow cell being independently arranged is also easy to produce abnormal sound, to solve the above-mentioned problems.Such as Fig. 3 and Fig. 5 institute
Show, in the present embodiment, electric expansion valve further includes the first noise elimination part 40.First noise elimination part 40 is arranged in accommodation space 23,
First noise elimination part 40 includes the first noise-reducing structure 41 and the second noise-reducing structure 42, and the first noise-reducing structure 41 is located at the second noise reduction knot
The top of structure 42, the first noise-reducing structure 41 block the first flow channels 211, and the second noise-reducing structure 42 blocks the second flow channels
222.Specifically, small flow status is fixed when electric expansion valve is in, and fluid flows into the first valve port 11 from first pipe 150
When, the fluid for flowing into the first valve port 11 will continue to flow into the second flow channels 222.The fluid flowed out from the second flow channels 222
The second noise-reducing structure 42 will be entered and carry out first time noise reduction, the fluid by first time noise reduction flows into the first noise-reducing structure 41 again
It is interior to carry out secondary noise reduction.Similarly, small flow status is fixed when electric expansion valve is in, and fluid is flowed into from second pipe 160
When in valve body 10, the fluid for flowing into valve body 10 can flow into the first flow channels 211.The fluid flowed out from the first flow channels 211
The first noise-reducing structure 41 will be entered and carry out first time noise reduction, the fluid by first time noise reduction flows into the second noise-reducing structure 42 again
It is interior to carry out secondary noise reduction.Above structure makes the fluid flowed into accommodation space 23 from positive and negative both direction that can be disappeared by secondary
Sound, therefore abnormal sound is greatly reduced, improve user experience.
In addition, in the present embodiment, the second end of spring is connected on valve seat core 22 by the second noise-reducing structure 42.Specifically
Bellows 120 and valve needle cover 140 are first sequentially sleeved on valve rod 30 in assembly, are then mounted on backstopping assembly 90 by ground
In mounting groove on valve rod 30.Backstopping assembly 90 can backstop valve needle cover 140, thus avoid valve needle cover 140 from valve rod 30 take off
Out.Then spring is set on the second shell of column again, forms a mounting assembly.Finally, valve rod 30 is protruded into needle 20, when
When valve rod 30 is moved downward to predetermined position, valve needle cover 140 is welded on needle 20 and completes assembly.The of spring at this time
One end is connected on cascaded surface 31, and the second end of spring is connected on the second noise-reducing structure 42.
As shown in Figure 3 and Figure 5, in the present embodiment, electric expansion valve further include: sealing 60 is arranged in the first noise reduction
To separate the first noise-reducing structure 41 and the second noise-reducing structure 42 between structure 41 and the second noise-reducing structure 42.Specifically, work as needle
20 are located at closed position, and when valve rod 30 is connected at the second valve port 221, electric expansion valve is in fixed small flow status.Work as stream
When body enters from the first flow channels 211, a part of fluid is by flowing into accommodation space 23 after 41 noise reduction of the first noise-reducing structure
It is interior.The fluid flowed into accommodation space 23 will continue to flow to the second noise-reducing structure 42.Another part fluid can be by the second sealing
Portion 60 stops, and makes its noise reduction repeatedly in the first noise-reducing structure 41, until entering in accommodation space 23.Therefore above structure
Have the advantages that following two: the setting of one, sealing 60 enables the first noise elimination part 40 to be recycled, and improves utilization
Rate improves erasure effect.Secondly, the setting of sealing 60 so that effective distance of the fluid Jing Guo noise reduction is longer, effectively prevent
Gap outflow of the fluid directly between the first noise-reducing structure 41 and the second noise-reducing structure 42.
As shown in Figure 3 and Figure 5, in the present embodiment, sealing 60 is sealing ring, has evacuation valve rod 30 on sealing ring
The circumferential side wall of second avoid holes, sealing 60 is bonded with the inner wall of needle ontology 21.Above structure is simple, easy to process and dress
Match.And above structure further blocks the gap between the first noise-reducing structure 41 and the second noise-reducing structure 42, to further mention
High erasure effect.
As shown in Figure 3 and Figure 5, in the present embodiment, electric expansion valve further includes the second noise elimination part 70.Second noise elimination part 70
The lower section of second valve port 221 is set, and blocks the second valve port 221 and the second flow channels 222.Specifically, when electronics is swollen
Swollen valve is in fixed small flow status, and when fluid flows into the first valve port 11 from first pipe 150, flows into the stream of the first valve port 11
Body passes through the second noise elimination part 70 and carries out first time noise reduction.Fluid by first time noise reduction continues to inflow second and crosses circulation
Road 222.The fluid flowed out from the second flow channels 222 will enter the second noise-reducing structure 42 and carry out second of noise reduction, by the
The fluid of secondary noise reduction flows into the first noise-reducing structure 41 again and carries out noise reduction three times.Similarly, it is fixed when electric expansion valve is in
Small flow status, and fluid from second pipe 160 flow into valve body 10 in when, flow into valve body 10 fluid can flow into first cross circulate
Road 211.The fluid flowed out from the first flow channels 211 will enter the first noise-reducing structure 41 and carry out first time noise reduction, by the
The fluid of noise reduction flows into the second noise-reducing structure 42 again and carries out secondary noise reduction.Fluid by noise reduction twice is from the second overcurrent
It flows out in channel 222.Fluid, which can enter in the second noise elimination part 70, after outflow carries out last time noise reduction.Above structure makes from positive and negative
The fluid that both direction flows into accommodation space 23 can be by noise reduction three times, therefore greatly reduces abnormal sound, improves
User experience.Further, since the second noise elimination part 70 blocks at the first valve port 11, therefore when electric expansion valve is in small flow tune
When nodular state, the fluid into accommodation space 23 also can be by noise reduction, to further increase erasure effect.
In the present embodiment, the first noise-reducing structure 41 and the second noise-reducing structure 42 and the second noise elimination part 70 are netted disappear
Sound part.Above structure can significantly be eliminated vortex, the bubble entrained by internal fluid, it is scattered to disturb, to preferably solve
Abnormal sound problem when the small flow adjusting in the early stage of existing electric expansion valve.
As shown in Figure 6 to 8, in the present embodiment, the decrement of elastic element 100 is less than or equal to valve rod 30 relative to valve
The mobile stroke of needle 20.In the present embodiment, elastic element 100 is spring.When valve rod to be mounted in spool, need downwards
Mobile valve rod.Since the first end of spring is contacted with cascaded surface 31, when moving down valve rod 30, need to overcome bullet
The elastic force that spring applies upwards.Due to elastic force F=kx, wherein x indicates decrement, and therefore, decrement is smaller, and the elastic force overcome is just
It is smaller.Therefore if minimizing the pre compressed magnitude of spring, the spring force overcome when installing is also easier to pacify with regard to smaller
Dress.Specifically, L is the lower surface of cascaded surface 31 and the distance between the upper surface of the second noise-reducing structure 42 in Fig. 6, if it is desired to making
The pre compressed magnitude of spring is small as far as possible, then the drift L3 of spring is needed to be less than equal to L, i.e. L3≤L.Fig. 7 shows valve rod
The schematic diagram of L1 is moved downwardly relative to needle, at this point, the upper surface of the lower surface of cascaded surface 31 and the second noise-reducing structure 42
The distance between be L2.L2+L1=L, i.e. L-L2=L1.Again due to L >=L3, L3-L2≤L1, i.e. elastic element 100
Decrement is less than or equal to the stroke mobile relative to needle 20 of valve rod 30.In addition, above structure also avoids the wave of value of elastic simultaneously
The dynamic influence (consistency of value of elastic when can keep maximum compression in the elastic component margin of tolerance) to upper and lower power output.
Present invention also provides a kind of refrigeration system, the embodiment according to the refrigeration system of the application includes electronic expansion
Valve.Wherein, electric expansion valve is above-mentioned electric expansion valve.Since above-mentioned electric expansion valve has the adjusting of flow accurately excellent
Point, therefore have the advantages that its refrigeration system also has it.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of electric expansion valve characterized by comprising
Valve body (10) has the first valve port (11)；
Needle (20) has the closed position abutted with first valve port (11) and avoids opening for the first valve port (11)
Position is opened, the bottom of the needle (20) has the second valve port (221) being connected to first valve port (11), the needle
(20) there are accommodation space (23) and the first flow channels (211) being connected to the accommodation space (23) and second to cross circulation
Road (222), first flow channels (211) are located on the side wall of the needle (20) and are in communication with the outside, second mistake
Circulation road (222) is located at the outer circumferential of second valve port (221) and is connected to second valve port (221)；
Valve rod (30) is at least partly threaded through in the accommodation space (23), and the valve rod (30) can move up and down to adjust
Flow at second valve port (221)；
Driving portion (80) drives the valve rod (30) to move up and down, wherein sets between the valve rod (30) and the needle (20)
Backstopping assembly (90) are equipped with, so that both when the needle (20) and the valve rod (30) are contacted by the backstopping assembly (90)
It moves synchronously, and when the needle (20) is located at the closed position, the valve rod (30) can be relative to the needle
(20) it moves up and down；
Elastic element (100), setting is in the needle (20) and supports between the needle (20) and the valve rod (30),
When the valve rod (30) is moved down relative to the needle (20), the elastic element (100) is compressed, when the valve rod
(30) it is moved up relative to the needle (20), and fluid flows into the accommodation space (23) from first valve port (11)
When, elastic element (100) the Xiang Suoshu needle (20) applies elastic force so that the needle (20) is connected to first valve
At mouth (11).
2. electric expansion valve according to claim 1, which is characterized in that the elastic element (100) is spring, the bullet
Spring is set on the valve rod (30), has cascaded surface (31) on the valve rod (30), the first end of the spring and the rank
Tread (31) abuts, and the second end of the spring is connected on the needle (20).
3. electric expansion valve according to claim 2, which is characterized in that the needle (20) include needle ontology (21) with
And the valve seat core (22) being arranged in the needle ontology (21), second valve port (221) and second flow channels
(222) it is arranged on the valve seat core (22), the second end of the spring is connected on the valve seat core (22).
4. electric expansion valve according to claim 3, which is characterized in that the electric expansion valve further include:
Valve needle cover (140) is fixed at the top of the needle ontology (21), is provided with evacuation on the valve needle cover (140)
First avoid holes of the valve rod (30), the inner wall of the needle ontology (21), the valve needle cover (140) lower surface with it is described
The upper surface of valve seat core (22) surrounds the accommodation space (23) jointly.
5. electric expansion valve according to claim 3, which is characterized in that the electric expansion valve further include:
First noise elimination part (40), in the accommodation space (23), first noise elimination part (40) includes the first noise reduction knot for setting
Structure (41) and the second noise-reducing structure (42), first noise-reducing structure (41) are located at the upper of second noise-reducing structure (42)
Side, first noise-reducing structure (41) block first flow channels (211), described in second noise-reducing structure (42) blocks
The second end of second flow channels (222), the spring is connected to the valve seat core by second noise-reducing structure (42)
(22) on.
6. electric expansion valve according to claim 5, which is characterized in that the electric expansion valve further include:
Sealing (60) is arranged between first noise-reducing structure (41) and second noise-reducing structure (42) described in separation
First noise-reducing structure (41) and second noise-reducing structure (42).
7. electric expansion valve according to claim 6, which is characterized in that the sealing (60) is sealing ring, described close
There is the second avoid holes for avoiding the valve rod (30), the circumferential side wall of the sealing (60) and the needle ontology in seal ring
(21) inner wall fitting.
8. electric expansion valve according to claim 1, which is characterized in that the electric expansion valve further include:
Second noise elimination part (70), second noise elimination part (70) are arranged in the lower section of second valve port (221), and described in closure
Second valve port (221) and second flow channels (222).
9. electric expansion valve according to claim 1, which is characterized in that the decrement of the elastic element (100) is less than
The stroke mobile relative to the needle (20) equal to the valve rod (30).
10. a kind of refrigeration system, comprising: electric expansion valve, which is characterized in that the electric expansion valve is in claim 1 to 9
Described in any item electric expansion valves.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765443.3A CN109425151B (en) | 2017-08-30 | 2017-08-30 | Electronic expansion valve and refrigeration system with same |
| JP2020512544A JP6889805B2 (en) | 2017-08-30 | 2018-08-16 | Electronic expansion valve and freezing system equipped with it |
| PCT/CN2018/100866 WO2019042140A1 (en) | 2017-08-30 | 2018-08-16 | Electronic expansion valve and refrigerating system provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765443.3A CN109425151B (en) | 2017-08-30 | 2017-08-30 | Electronic expansion valve and refrigeration system with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109425151A true CN109425151A (en) | 2019-03-05 |
| CN109425151B CN109425151B (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710765443.3A Active CN109425151B (en) | 2017-08-30 | 2017-08-30 | Electronic expansion valve and refrigeration system with same |
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| Country | Link |
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| CN (1) | CN109425151B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829216A (en) * | 2019-04-23 | 2020-10-27 | 浙江盾安禾田金属有限公司 | Electronic expansion valve and refrigerator with same |
| CN113915339A (en) * | 2020-07-09 | 2022-01-11 | 株式会社鹭宫制作所 | Two-stage electric valve and refrigeration cycle system |
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| JP2012172836A (en) * | 2011-02-24 | 2012-09-10 | Fuji Koki Corp | Motor-operated valve |
| CN105841410A (en) * | 2015-01-13 | 2016-08-10 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN205745625U (en) * | 2016-05-10 | 2016-11-30 | 浙江三花股份有限公司 | Electric expansion valve |
| CN106439072A (en) * | 2015-08-11 | 2017-02-22 | 浙江三花制冷集团有限公司 | Electronic expansion valve |
| CN106439164A (en) * | 2015-08-13 | 2017-02-22 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012172836A (en) * | 2011-02-24 | 2012-09-10 | Fuji Koki Corp | Motor-operated valve |
| CN105841410A (en) * | 2015-01-13 | 2016-08-10 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN106439072A (en) * | 2015-08-11 | 2017-02-22 | 浙江三花制冷集团有限公司 | Electronic expansion valve |
| CN106439164A (en) * | 2015-08-13 | 2017-02-22 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN205745625U (en) * | 2016-05-10 | 2016-11-30 | 浙江三花股份有限公司 | Electric expansion valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829216A (en) * | 2019-04-23 | 2020-10-27 | 浙江盾安禾田金属有限公司 | Electronic expansion valve and refrigerator with same |
| CN113915339A (en) * | 2020-07-09 | 2022-01-11 | 株式会社鹭宫制作所 | Two-stage electric valve and refrigeration cycle system |
| CN113915339B (en) * | 2020-07-09 | 2024-04-02 | 株式会社鹭宫制作所 | Two-stage electric valve and refrigeration cycle system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109425151B (en) | 2020-08-28 |
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