CN109990103A - A kind of electric expansion valve - Google Patents
A kind of electric expansion valve Download PDFInfo
- Publication number
- CN109990103A CN109990103A CN201810002907.XA CN201810002907A CN109990103A CN 109990103 A CN109990103 A CN 109990103A CN 201810002907 A CN201810002907 A CN 201810002907A CN 109990103 A CN109990103 A CN 109990103A
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- needle
- valve
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- chamber
- screw rod
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- 239000003507 refrigerant Substances 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims description 23
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 5
- 206010020852 Hypertonia Diseases 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241001133184 Colletotrichum agaves Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—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 with screw-spindle
- F16K1/04—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 with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The present invention discloses a kind of electric expansion valve, including valve core case and needle screw component, needle screw component includes needle component and screw component, valve core case is fixed with the nut being threadedly coupled with screw component, screw component and nut thread cooperation drive needle component axially movable, to adjust the refrigerant flow for flowing through electric expansion valve valve port；Needle component is formed with needle chamber, and screw component forms screw rod chamber between one end and nut of needle component, and needle chamber is connected with screw rod chamber by circulation passage.By the way that circulation passage is arranged, so that pressure balance can be fast implemented between needle chamber and screw rod chamber, so that avoiding needle chamber that fluid-tight phenomenon occurs in refrigerant environment forms closed chamber, the reliability of electric expansion valve is improved.And by the setting of above-mentioned circulation passage, when electric expansion valve is closed to during standard-sized sheet entirely from valve port, the pressure between needle chamber and screw rod chamber is same being capable of Fast-Balance.
Description
Technical field
The present invention relates to refrigeration control technical field, in particular to a kind of electric expansion valve
Background technique
Electric expansion valve is mainly used in frequency-conversion air-conditioning system, when work, is rotated by coil drive rotor part, and band
Dynamic screw rod rotation, screw rod and nut form screw thread pair, to realize the axial movement of screw rod, and needle are driven to be axially moved, with
Change the aperture of valve port, to adjust the refrigerant flow for flowing through valve port.
The needle of the electric expansion valve has needle chamber, when needle chamber forms confined space, when leading to hypertonia, each zero
Matching relationship pressure difference effect in refrigerant environment is easy to appear fluid-tight phenomenon between component, to make the screw rod of electric expansion valve
Become being rigidly connected from elastic connection between needle, cause screw rod that cannot be freely rotated, to make electric expansion valve work can
By property decline.
In view of this, how to provide a kind of electric expansion valve, the pressure difference in refrigerant environment is prevented between screw rod and needle
The fluid-tight phenomenon generated is acted on, it is this field that enhancing screw, which rotates flexibility to improve the actuation reliability of electric expansion valve,
Technical staff's technical problem urgently to be resolved.
Summary of the invention
In order to solve the above technical problems, it is an object of the present invention to provide a kind of electric expansion valves, which is characterized in that including valve
Core print seat and needle screw component, the needle screw component include needle component and screw component, the valve core case with and it is described
The nut that screw component is threadedly engaged is fixedly connected, and the screw component is by driving the needle with nut thread cooperation
Component axially movable, the refrigerant flow of the electric expansion valve valve port is flowed through with adjusting；
The needle component is formed with needle chamber, the one end and the nut of the screw component close to the needle component
Between form screw rod chamber, the needle chamber is connected with the screw rod chamber by circulation passage.
In the present invention, by the way that circulation passage is arranged, so that can be quick by circulation passage between needle chamber and screw rod chamber
It realizes pressure balance, so that avoiding needle chamber that fluid-tight phenomenon occurs in refrigerant environment forms closed chamber, improves electronic expansion
The reliability of valve.And by the setting of above-mentioned circulation passage, when electric expansion valve is closed to during standard-sized sheet entirely from valve port, needle
Pressure between chamber and screw rod chamber is same being capable of Fast-Balance.
Meanwhile the present invention provides another electric expansion valve, including valve seat, needle screw component and guide member, institute
Stating needle screw component includes needle component and screw component, the guide member with and the spiral shell that is threadedly engaged of the screw component
Mother is fixedly connected, and the screw component is by driving the needle component axially movable with nut thread cooperation, to adjust
The refrigerant flow of valve port of the throttling through the electric expansion valve；
The guide member has guide member inner cavity, and the needle component is located at the guide member inner cavity, the valve
Needle assemblies are formed with needle chamber, and the screw component forms screw rod between one end and the nut of the needle component
Chamber, the needle chamber are connected with the screw rod chamber by circulation passage.
Optionally, the needle component is located at the valve core case chamber of the valve core case, and can be in the intracavitary axis of the valve core case
To movement, there is the first predetermined gap between the inner wall part of the valve core case and the needle component outside wall portions, described first is pre-
Fixed gap is connected to the screw rod chamber；
The needle component includes needle portion, and the inner cavity in the needle portion is the needle chamber, the side wall in the needle portion
The first intercommunicating pore for being connected to the needle chamber and first predetermined gap is offered, first intercommunicating pore is pre- with described first
Fixed gap forms the circulation passage.
Optionally, the needle component is at least partially disposed at the guide member inner cavity of the guide member, the guide portion
There is the second predetermined gap, second predetermined gap and the screw rod between the inner wall part of part and the outside wall portions in the needle portion
Chamber connection；
The needle component includes needle portion, and the inner cavity in the needle portion is the needle chamber, the side wall in the needle portion
The second intercommunicating pore for being connected to the needle chamber and second predetermined gap is offered, second intercommunicating pore is pre- with described second
Fixed gap forms the circulation passage.
Optionally, the screw component includes screw rod and bushing, and the needle component further includes being coated at the screw rod
Valve needle cover, and there is third predetermined gap, the third predetermined gap and the silk between the screw rod and the valve needle cover
Rod cavity connection, the bushing are placed on axial direction with the needle and offset, so that the needle chamber and the screw rod chamber pass through institute
State bushing and valve needle cover isolation.
Optionally, in the end face that the valve needle cover and the bushing offset, the end face of at least one offers connectivity slot, institute
It states connectivity slot and is connected to the third predetermined gap and the needle chamber.
Optionally, the valve needle cover and the bushing open up the connectivity slot, and the connectivity slot connection of the two.
Optionally, the valve core case offers valve port, and the needle portion includes the body part with valve port cooperation, described
Needle portion is an integral molding structure.
Optionally, the valve seat offers valve port, and the needle component includes sleeve part and cooperates with the valve port
Valve head, the guide member provides guiding to the valve head of the nut and the needle component simultaneously, described to draw
The end for leading component offers through hole, and the valve head is protruded into the valve support chamber of the valve seat by the through hole to approach
Or far from the valve port.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the electric expansion valve provided by the present invention in the first specific embodiment；
Fig. 2 is the partial enlarged view of Fig. 1；
Fig. 3 is structural schematic diagram of the electric expansion valve provided by the present invention in second of specific embodiment；
Fig. 4 is the structural schematic diagram of needle component in a specific embodiment in Fig. 3；
Fig. 5 is the structural schematic diagram of needle component in another specific embodiment in Fig. 3；
Fig. 6 is valve needle cover, bushing and screw rod in electric expansion valve provided by the present invention in the first specific embodiment
Fit structure schematic diagram；
Fig. 7 is the structural schematic diagram of valve needle cover in Fig. 6；
Fig. 8 is valve needle cover, bushing and screw rod in electric expansion valve provided by the present invention in second of specific embodiment
Fit structure schematic diagram；
Fig. 9 is the structural schematic diagram of bushing in Fig. 8；
Figure 10 is valve needle cover, bushing and screw rod in electric expansion valve provided by the present invention in second of specific embodiment
Fit structure schematic diagram.
In Fig. 1-10:
1 valve core case, 11 valve seats, 2 needle components, 21 needle portions, 211 first intercommunicating pores, 212 second intercommunicating pores, 22 guidance
Component, 23 needle chambers, 24 springs, 25 valve needle covers, 26 gaskets, 27 ball bearings, 28 connectivity slots, 29 body parts, 291 boss；
3 screw components, 31 screw rods, 32 bushings, screw rod chamber 33；
4 valve bodies, 41 valve chambers, 42 adapter tubes；
5 shells, 6 nuts, 7 rotor parts, 8 electromagnetic coils；
The first predetermined gap of S1, the second predetermined gap of S2, S3 third predetermined gap.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art more fully understand technical solution of the present invention
Applying example, the present invention is described in further detail.
Please refer to attached drawing 1-5, wherein Fig. 1 is electric expansion valve provided by the present invention in the first specific embodiment
Structural schematic diagram；Fig. 2 is the partial enlarged view of Fig. 1；Fig. 3 is electric expansion valve provided by the present invention in second of specific embodiment
In structural schematic diagram；Fig. 4 is the structural schematic diagram of needle component in a specific embodiment in Fig. 3；Fig. 5 is valve in Fig. 3
The structural schematic diagram of needle assemblies in another specific embodiment.
In a specific embodiment, the present invention provides a kind of electric expansion valve, as shown in Figure 1, the electric expansion valve packet
Include body portion and drive part, wherein body portion includes valve core case 1, valve body 4 and needle component 2, and valve body 4 is connected with two
Adapter tube 42, two adapter tubes 42 are connected to the valve chamber 41 of valve body 4, and valve core case 1 offers valve port, which is controlled by needle component 2
Its aperture, to adjust the flow into refrigerant in valve chamber 41.
Meanwhile drive part include shell 5 and set on 5 inner cavity of shell and be threadedly coupled screw component 3 and nut 6,
In, nut 6 is fixed on valve body 4, further includes the electromagnetic coil 8 positioned at 5 outside of shell, 3 end of screw component is fixed with rotor portions
Part 7, electromagnetic coil 8, which is powered, generates magnetic field, and rotor part 7 drives the screw rod 32 in screw component 3 to rotate in magnetic field, and screw rod
Component 3 is while rotation, additionally it is possible to be axially moved in nut 6.Needle component 2 is connected axially to screw component 3, to make
Obtaining screw component 3 drives needle component 2 to be axially moved, and then changes the aperture of valve port.
Further, it is axially moved to be able to drive needle 2 when realizing that screw component 3 rotates in nut 6, the electronics
Expansion valve further includes such as flowering structure.As shown in Fig. 2, screw rod 31 close to the end of needle component 2 is fixed with bushing in screw component 3
32, correspondingly, needle component 2 includes needle portion 21, which is fixed with valve needle cover 25, needle close to the end of screw rod 31
Portion 21 has needle chamber 23, and bushing 32 and valve needle cover 25 are respectively positioned in needle chamber 23.Also have in needle chamber 23 in compression shape
The spring 24 of state, spring 24 are pressed between 23 inner wall of needle chamber and the first axis end face of bushing 32, the second axis of bushing 32
It offsets to end face and the axial end face of valve needle cover 25, so that passing through bushing 32, valve needle cover between needle portion 21 and screw rod 31
25 are axially connected with spring 24.
Meanwhile the both ends along axial direction of screw rod 31 are connected with needle component 2 and rotor part 7 respectively, in order to provide needle
The space that portion 21 is axially moved, screw rod 31 form screw rod chamber 33 between the end and nut 6 in needle portion 21, and valve port opening increases
When big, screw rod 31 drives needle portion 21 to enter in the screw rod chamber 33.Wherein, as depicted in figs. 1 and 2, screw rod 31 has external screw thread
Portion, the external thread part are threadedly coupled to form thread fiting part with nut 6, and thread fiting part lower section screw rod 31 is interior with nut 6
Wall has certain radial clearance, which forms screw rod chamber 33, specifically part and valve needle cover below thread fiting part
25 or more part, formation screw rod chamber 33 between the rwo.
The above-mentioned electric expansion valve course of work are as follows: when screw rod 31 is axially moved along the direction far from valve port, due to bushing 32
First end face and valve needle cover 25 it is axial offset so that needle portion 21 acts on lower edge in the elastic force of thrust and spring 24
Direction far from valve port is axially moved, to increase the aperture of valve port.
Before needle portion 21 is contacted with valve port, when needle portion 21 is moved towards valve port, the first end face and needle of bushing 23
Set 25 is axial to offset, so that needle portion 21 acts on axis of orientation of the lower edge towards valve port in the elastic force of thrust and spring 24
To movement, to reduce the aperture of valve port.
It is appreciated that as shown in Fig. 2, contacted with valve port when needle portion 21, when hypertonia in needle chamber 23, lead to valve
Needle part 21 is fail to open by dieback, therefore, in order to guarantee that electric expansion valve can work normally, need to be avoided in needle chamber 23
Hypertonia, to avoid fluid-tight phenomenon occurs between each components in refrigerant environment.Specifically can by communicating valve needle cavity 23 with
Screw rod chamber 31, so that the pressure balance of the two promotes the electric expansion valve normal to avoid 23 pressure of needle chamber excessive
Work.
Under normal conditions, be connected between needle chamber 23 and screw rod chamber 33 mainly by valve needle cover 25, bushing 32 and screw rod 3 it
Between gap realize, still, the gap is smaller, pressure balance between needle chamber 23 and screw rod chamber 31 when system pressure being caused to fluctuate
Speed is relatively slow can not even to be balanced, and in the presence of having liquid, the gap between valve needle cover 25, bushing 32 and screw rod 31 is in refrigerant
Because differential pressure action is likely to occur fluid-tight phenomenon in environment, needle chamber 23 and screw rod chamber 33 is caused to be respectively formed closed cavity, to lead
It causes the pressure between screw rod chamber 31 and needle chamber 33 that can not balance, and then influences electric expansion valve and work normally.And work as refrigerant temperature
When degree variation causes the pressure in needle chamber 23 to increase above its pressure-resistant surplus, the high pressure in needle chamber 23 leads to needle portion 21
Elastic connection between screw rod 31 becomes being rigidly connected, and influences the reliability and precision of electric expansion valve.
In addition, being closed entirely to during standard-sized sheet as described above, working as electric expansion valve from valve port, the first end face and valve of bushing 32
Needle guard 25 is axial to offset, and therefore, during being somebody's turn to do, is in close contact between bushing 32 and valve needle cover 25, gap very little between the two
Or gapless, lead to that needle chamber 23 and 33 pressure balance speed of screw rod chamber are relatively slow during this or can not balance.
Based on this, in order to solve the above technical problem, the present invention provides electric expansion valve in, needle chamber 23 and screw rod chamber
Between 33 in addition to being connected to by the gap between valve needle cover 25, bushing 32 and screw rod 31, also it is connected to by balance channel, and in electricity
In the sub- expansion valve course of work, which is connected always.
Therefore, in the present invention, by the way that balance channel is arranged, so that balance can be passed through between needle chamber 23 and screw rod chamber 33
Channel fast implements pressure balance, so that avoiding needle chamber 23 that fluid-tight phenomenon occurs in refrigerant environment forms closed chamber, with
It avoids the elastic connection between screw component 3 and needle component 2 from becoming being rigidly connected, improves the reliability of electric expansion valve.And
And by the setting of above-mentioned balance channel, when electric expansion valve just touches valve port standard-sized sheet process from needle portion 21 and valve port
In, pressure between needle chamber 23 and screw rod chamber 33 is same being capable of Fast-Balance.
Specifically, as in the embodiment illustrated in figures 1 and 2, valve core case 1 has valve core case chamber, the needle portion 21 of needle component 2
It is intracavitary positioned at valve core case, and can in the intracavitary axial movement of the valve core case, therefore, 1 inner wall of valve core case and 21 outer wall of needle portion it
Between there is the first predetermined gap S1, and the first predetermined gap S1 is connected to screw rod chamber 33.Meanwhile 21 side wall of needle portion offers
First intercommunicating pore 211 of communicating valve needle cavity 23 and the first predetermined gap S1, so that leading between needle chamber 23 and screw rod chamber 31
The first predetermined gap S1 and the connection of the first intercommunicating pore 211 are crossed, i.e. the first intercommunicating pore 211 and the first predetermined gap S1 form above-mentioned flat
Weighing apparatus channel.
In embodiment as in Figure 3-5, needle screw component includes needle component 2, screw component 3 and guide member
22, and the guide member 22 guide member inner cavity formed needle chamber 23, needle component 2 be located at it is intracavitary in the guide member, and
It can be axially moved.Meanwhile the guide member 22 be located at valve core case intracavitary, 1 inner wall part of valve core case and 22 outside wall portions of guide member
Between have the second predetermined gap S2, which is connected to screw rod chamber 33, and the side wall of guide member 22 opens up
There are communicating valve needle cavity 23 and the second intercommunicating pore 212 of the second predetermined gap S2, second intercommunicating pore 212 and the second predetermined gap S2
Form circulation passage.Even.
In the present embodiment, the first intercommunicating pore 211 only opened up by the side wall in needle portion 21 or in guide member 22
Side wall, which opens up the second intercommunicating pore 212, can form above-mentioned balance channel, have the advantages that it is easy to process, and needle portion 21 or guidance
Component does not influence itself and the matching relationship of other component and the course of work of electric expansion valve, therefore, this reality after increasing intercommunicating pore
The intercommunicating pore in example is applied while improving electric expansion valve functional reliability, not will cause other hidden danger.
In addition, according to actual needs, the side wall in needle portion 21 or the side wall of guide member 22 can offer several above-mentioned companies
Through-hole, and the intercommunicating pore can be the through-hole of arbitrary shape.Therefore, the present invention is not construed as limiting the number and shape of intercommunicating pore.
Please continue to refer to attached drawing 6-10, wherein Fig. 6 is valve needle cover, bushing and silk in electric expansion valve provided by the present invention
Fit structure schematic diagram of the bar in the first specific embodiment；Fig. 7 is the structural schematic diagram of valve needle cover in Fig. 6；Fig. 8 is this hair
The fit structure schematic diagram of valve needle cover, bushing and screw rod in second of specific embodiment in bright provided electric expansion valve；Fig. 9
For the structural schematic diagram of bushing in Fig. 8；Figure 10 is valve needle cover, bushing and screw rod in electric expansion valve provided by the present invention second
Fit structure schematic diagram in kind specific embodiment.
In another embodiment, as illustrated in figures 6-10, valve needle cover 25 is placed on 31 periphery of screw rod, and screw rod 31 can be in needle
Therefore rotation in set 25 has third predetermined gap S3, and the third predetermined gap S3 and silk between screw rod 31 and valve needle cover 25
Rod cavity 33 is connected to.Meanwhile in the end face that offsets of valve needle cover 25 and bushing 32, the end face of at least one offers connectivity slot 28, and
The connectivity slot 28 is connected to third predetermined gap S3 and needle chamber 23, therefore, pre- by third between needle chamber 23 and screw rod chamber 33
Fixed gap S3 is connected to connectivity slot 28, and the connectivity slot 28 and third predetermined gap S3 form above-mentioned circulation passage.
As shown in Figure 6 and Figure 7, which is only opened in valve needle cover 25, and as shown in Figure 8 and Figure 9, the connectivity slot 28 is only
It is opened in bushing 32, as shown in Figure 10, which is opened in valve needle cover 25 and bushing 32.
In the present embodiment, above-mentioned circulation only can be formed by opening up connectivity slot 28 on bushing 32 and/or valve needle cover 25
Channel, equally has the advantages that easy to process, and does not influence itself and its after opening up connectivity slot 28 on bushing 32 and/or valve needle cover 25
The matching relationship of its component and the course of work of electric expansion valve, therefore, the connectivity slot 28 in the present embodiment are swollen in raising electronics
While swollen valve functional reliability, other hidden danger are not will cause.
Specifically, above-mentioned connectivity slot 28 may be provided with multiple, and can be the groove of arbitrary shape, therefore, right in the present invention
The number and shape of connectivity slot 28 are not construed as limiting.
Further, as shown in fig. 7, when valve needle cover 25 and bushing 32 open up connectivity slot 28, two connectivity slots 28 are directly
Connection.
In addition, communicating passage can also be any combination of above two embodiment in electric expansion valve in the present invention,
By taking electric expansion valve as depicted in figs. 1 and 2 as an example, the side wall in needle portion 21 opens up the first intercommunicating pore 211, meanwhile, bushing 23
And/or valve needle cover 25 offers connectivity slot 28；Or the side wall in needle portion 21 opens up the first intercommunicating pore 211, meanwhile, bushing 23
And/or valve needle cover 25 offers connectivity slot 28.
In the above various embodiments, as shown in Fig. 2, needle portion 21 is integrally formed with the body part 29 cooperated with valve port, this
29 section of body portion is taper.
In addition, as shown in Figure 4 and Figure 5, needle component 2 includes sleeve part and the valve head with valve port cooperation, guide portion
Part 22 provides guiding to the valve head of nut 6 and needle component 2 simultaneously, and the end of the guide member 22, which offers, to be passed through
Through-hole, valve head are protruded into the valve support chamber of valve seat 11 by through hole with close to or away from the valve port.
Specifically, body part 29 has the boss 291 to extend radially outwardly, and 29 one end of body part passes through the mounting hole, and
Boss 291 and the inner wall of guide member 22 offset, and spring 24 is pressed between bushing 32 and body part 29, so that body part
It is connected between 29 and guide member 22 by the way that spring 24 and boss 291 are axial.
Further, there is gasket 26, to buffer guide member 22 and this between 22 inner wall of boss 291 and guide member
Shock loading between body portion 29.
In addition, as shown in Figure 10, being connected between screw rod 31 and body part 29 by ball bearing 27, so that screw rod 31
It can be freely rotated, meanwhile, screw rod 31 can also drive body part 212 to be axially moved when being axially moved, to change opening for valve port
Degree.
A kind of electric expansion valve provided by the present invention is described in detail above.Specific case used herein
Principle and implementation of the present invention are described, the above embodiments are only used to help understand side of the invention
Method and its core concept.It should be pointed out that for those skilled in the art, not departing from the principle of the invention
Under the premise of, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the claims in the present invention
In protection scope.
Claims (9)
1. a kind of electric expansion valve, which is characterized in that including valve core case (1) and needle screw component, the needle screw component
Including needle component (2) and screw component (3), nut (6) that the valve core case (1) and the screw component (3) are threadedly engaged
It is fixedly connected, the screw component (3) drives the needle component (2) along axial fortune by being threadedly engaged with the nut (6)
It is dynamic, to adjust the valve port refrigerant flow for flowing through the electric expansion valve；
The needle component (2) is formed with needle chamber (23), and the screw component (3) is close to one end of the needle component (2)
Screw rod chamber (33) are formed between the nut (6), the needle chamber (23) passes through circulation passage phase with the screw rod chamber (33)
Connection.
2. a kind of electric expansion valve, which is characterized in that including valve seat (11), needle screw component and guide member (22), institute
Stating needle screw component includes needle component (2) and screw component (3), the guide member (22) and the screw component (3)
The nut (6) being threadedly engaged is fixedly connected, and the screw component (3) drives the valve by being threadedly engaged with the nut (6)
Needle assemblies (2) axially movable, the refrigerant flow of the valve port of the electric expansion valve are flowed through with adjusting；
The guide member (22) has guide member inner cavity, and the needle component (2) is located at the guide member inner cavity, described
Needle component (2) is formed with needle chamber (23), the one end and the spiral shell of the screw component (3) close to the needle component (2)
Screw rod chamber (33) are formed between female (6), the needle chamber (23) is connected with the screw rod chamber (33) by circulation passage.
3. electric expansion valve according to claim 1, which is characterized in that the needle component (2) is located at the valve core case
(1) valve core case chamber, and can be in the intracavitary axial movement of the valve core case, the inner wall part and the needle of the valve core case (1)
There is the first predetermined gap (S1) between component (2) outside wall portions, first predetermined gap (S1) and the screw rod chamber (33) are even
It is logical；
The needle component (2) includes needle portion (21), and the inner cavity of the needle portion (21) is the needle chamber (23), the valve
The side wall in needle portion (21) offers the first intercommunicating pore for being connected to the needle chamber (23) and first predetermined gap (S1)
(211), first intercommunicating pore (211) and first predetermined gap (S1) form the circulation passage.
4. electric expansion valve according to claim 2, which is characterized in that the needle component (2) is at least partially disposed at institute
State the guide member inner cavity of guide member (22), the outside wall portions of the inner wall part of the guide member (22) and the needle portion (21)
Between there is the second predetermined gap (S2), second predetermined gap (S2) is connected to the screw rod chamber (33)；
The needle component (2) includes needle portion (21), and the inner cavity of the needle portion (21) is the needle chamber (23), the valve
The side wall in needle portion (21) offers the second intercommunicating pore for being connected to the needle chamber (23) and second predetermined gap (S2)
(212), second intercommunicating pore (212) and second predetermined gap (S2) form the circulation passage.
5. electric expansion valve according to claim 3 or 4, which is characterized in that the screw component (3) includes screw rod (31)
And bushing (32), the needle component (2) further include the valve needle cover (25) for being coated at the screw rod (31), and the screw rod
(31) there is third predetermined gap (S3) between the valve needle cover (25), the third predetermined gap (S3) and the screw rod chamber
(33) it is connected to, the bushing (32) offsets with the valve needle cover (25) in axial direction, the needle chamber (23) and the screw rod
Chamber (33) is isolated by the bushing (32) and the valve needle cover (25).
6. electric expansion valve according to claim 5, which is characterized in that the valve needle cover (25) and the bushing (32) phase
In the end face supported, the end face of at least one is offered connectivity slot (28), and the connectivity slot (28) is connected to the third predetermined gap
(S3) with the needle chamber (23).
7. electric expansion valve according to claim 5, which is characterized in that the valve needle cover (25) and the bushing (32) are equal
It offers connectivity slot (28), and the connectivity slot (28) connection of the two.
8. electric expansion valve according to claim 3, which is characterized in that the valve core case (1) offers valve port, the valve
Needle portion (21) includes the body part (29) with valve port cooperation, and the needle portion (21) is an integral molding structure.
9. electric expansion valve according to claim 4, which is characterized in that the valve seat (11) offers valve port, the valve
Needle assemblies (2) include sleeve part and the valve head with valve port cooperation, and the guide member (22) is simultaneously to the nut
(6) and the valve head of the needle component (2) provides guiding, and the end of the guide member (22) offers perforation
Hole, the valve head are protruded into the valve support chamber of the valve seat (11) by the through hole with close to or away from the valve port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002907.XA CN109990103A (en) | 2018-01-02 | 2018-01-02 | A kind of electric expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002907.XA CN109990103A (en) | 2018-01-02 | 2018-01-02 | A kind of electric expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109990103A true CN109990103A (en) | 2019-07-09 |
Family
ID=67128901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810002907.XA Pending CN109990103A (en) | 2018-01-02 | 2018-01-02 | A kind of electric expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109990103A (en) |
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| CN112901801A (en) * | 2019-11-19 | 2021-06-04 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN112901793A (en) * | 2019-12-04 | 2021-06-04 | 伊希欧1控股有限公司 | Expansion valve |
| CN113833867A (en) * | 2021-09-29 | 2021-12-24 | 浙江佳明新能源装备有限公司 | Large-diameter electronic expansion valve |
| US20220042728A1 (en) * | 2018-12-25 | 2022-02-10 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic Expansion Valve and Air Conditioning System with Electronic Expansion Valve |
| CN114352748A (en) * | 2022-01-26 | 2022-04-15 | 广东威灵电机制造有限公司 | Valve needle assembly, electronic expansion valve and refrigeration equipment |
| WO2023030409A1 (en) * | 2021-09-02 | 2023-03-09 | 浙江盾安人工环境股份有限公司 | Valve needle and electronic expansion valve having same |
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