CN207864635U - A kind of electric expansion valve - Google Patents
A kind of electric expansion valve Download PDFInfo
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- CN207864635U CN207864635U CN201820004551.9U CN201820004551U CN207864635U CN 207864635 U CN207864635 U CN 207864635U CN 201820004551 U CN201820004551 U CN 201820004551U CN 207864635 U CN207864635 U CN 207864635U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The utility model 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 drives needle component axially movable with nut thread cooperation, to adjust the refrigerant flow for flowing through electric expansion valve valve port；Needle component is formed with needle chamber, and screw component forms lead screw chamber between one end and nut of needle component, and needle chamber is connected with lead screw chamber by circulation passage.By the way that circulation passage is arranged so that pressure balance can be fast implemented between needle chamber and lead screw chamber, closed chamber is formed to avoid needle chamber that fluid-tight phenomenon occurs in refrigerant environment, improve the reliability of electric expansion valve.And by the setting of above-mentioned circulation passage, when electric expansion valve is fully closed to during standard-sized sheet from valve port, the pressure between needle chamber and lead screw chamber is same being capable of Fast-Balance.
Description
Technical field
The utility model is related to refrigeration control technical field, more particularly to a kind of electric expansion valve
Background technology
Electric expansion valve is mainly used in frequency-conversion air-conditioning system, when work, is rotated by coil drive rotor part, and band
Dynamic lead screw rotation, lead screw form screw thread pair with nut, to realize the axial movement of lead screw, and needle are driven to be axially moved, with
The aperture for changing 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 susceptible to fluid-tight phenomenon between component, to make the lead screw of electric expansion valve
Become being rigidly connected from elastic connection between needle, cause lead screw that cannot be freely rotated, to make electric expansion valve work can
Decline by property.
In view of this, how to provide a kind of electric expansion valve, the pressure difference in refrigerant environment is prevented between lead screw and needle
The fluid-tight phenomenon generated is acted on, it is this field that enhancing screw, which rotates flexibility to improve the start reliability of electric expansion valve,
Technical staff's technical problem urgently to be resolved hurrily.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of electric expansion valve, which is characterized in that packet
Include valve core case and needle screw component, the needle screw component includes needle component and screw component, the valve core case with and
The nut of the screw component screw-thread fit is fixedly connected, and the screw component with the nut thread by coordinating described in drive
Needle 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, and the screw component is close to one end of the needle component and the nut
Between form lead screw chamber, the needle chamber is connected with the lead screw chamber by circulation passage.
In the utility model, by the way that circulation passage is arranged so that circulation passage can be passed through between needle chamber and lead screw chamber
Pressure balance is fast implemented, closed chamber is formed to avoid needle chamber that fluid-tight phenomenon occurs in refrigerant environment, improves electronics
The reliability of expansion valve.And by the setting of above-mentioned circulation passage, when electric expansion valve is fully closed to during standard-sized sheet from valve port,
Pressure between needle chamber and lead screw chamber is same being capable of Fast-Balance.
Meanwhile the utility model provides another electric expansion valve, including valve seat, needle screw component and guide portion
Part, the needle screw component include needle component and screw component, the guide member with and the screw component screw thread match
The nut of conjunction is fixedly connected, and the screw component with nut thread cooperation by driving the needle component to transport in an axial direction
It is dynamic, to adjust the refrigerant flow for the valve port for flowing through the electric expansion valve；
There is the guide member guide member inner cavity, the needle component to be located at the guide member inner cavity, the valve
Needle assemblies are formed with needle chamber, and the screw component forms lead screw between one end and the nut of the needle component
Chamber, the needle chamber are connected with the lead screw 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 valve core case intracavitary axis
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 lead screw 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 lead screw between the inner wall part of part and the outside wall portions in the needle portion
Chamber is connected to；
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 lead screw and bushing, and the needle component further includes being coated at the lead screw
Valve needle cover, and there is third predetermined gap, the third predetermined gap and the silk between the lead screw and the valve needle cover
Rod cavity is connected to, and the bushing is placed on axial direction with the needle and offsets, so that the needle chamber passes through institute with the lead screw chamber
State bushing and valve needle cover isolation.
Optionally, in the end face that the valve needle cover offsets with the bushing, 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 opens up the connectivity slot, and the connectivity slot connection of the two with the bushing.
Optionally, the valve core case offers valve port, and the needle portion includes the body part coordinated with the valve port, described
Needle portion is an integral molding structure.
Optionally, the valve seat offers valve port, and the needle component includes sleeve part and coordinates 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 stretched into the valve support chamber of the valve seat by the through hole to approach
Or far from the valve port.
Description of the drawings
Fig. 1 provides structural schematic diagram of the electric expansion valve in the first specific embodiment by the utility model；
Fig. 2 is the partial enlarged view of Fig. 1；
Fig. 3 provides structural schematic diagram of the electric expansion valve in second of specific embodiment by the utility model；
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 provides valve needle cover in electric expansion valve, bushing and lead screw in the first specific embodiment by the utility model
In fit structure schematic diagram；
Fig. 7 is the structural schematic diagram of valve needle cover in Fig. 6；
Fig. 8 provides valve needle cover in electric expansion valve, bushing and lead screw in second of specific embodiment by the utility model
In fit structure schematic diagram；
Fig. 9 is the structural schematic diagram of bushing in Fig. 8；
Figure 10 provides valve needle cover in electric expansion valve, bushing and lead screw in second of specific embodiment by the utility model
In 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 guiding
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 lead screws, 32 bushings, lead screw chamber 33；
4 valve bodies, 41 valve chambers, 42 are taken over；
5 shells, 6 nuts, 7 rotor parts, 8 electromagnetic coils；
The first predetermined gaps of S1, the second predetermined gaps of S2, S3 third predetermined gaps.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in further detail for body embodiment.
Please refer to attached drawing 1-5, wherein Fig. 1 provides electric expansion valve in the first specific embodiment by the utility model
In structural schematic diagram；Fig. 2 is the partial enlarged view of Fig. 1；Fig. 3 provides electric expansion valve by the utility model to be had at second
Structural schematic diagram in body 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.
In a specific embodiment, the utility model provides a kind of electric expansion valve, as shown in Figure 1, the electronic expansion
Valve includes body portion and drive part, wherein body portion includes valve core case 1, valve body 4 and needle component 2, and valve body 4 connects
There are two take overs 42, two take overs 42 to be connected to the valve chamber 41 of valve body 4, valve core case 1 offers valve port, which passes through needle component 2
Its aperture is controlled, to adjust the flow into refrigerant in valve chamber 41.
Meanwhile drive part includes shell 5 and set on 5 inner cavity of shell and the screw component 3 and the nut 6 that are threadedly coupled,
In, nut 6 is fixed on valve body 4, further includes the electromagnetic coil 8 for being located 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 lead screw 32 in screw component 3 to rotate in magnetic field, and lead screw
Component 3 is while rotation, additionally it is possible to is 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, in order to realize that screw component 3 can drive needle 2 to be axially moved in nut 6 when rotation, the electronics
Expansion valve further includes such as lower structure.As shown in Fig. 2, lead screw 31 is fixed with bushing close to the end of needle component 2 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 lead screw 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 compression shape in needle chamber 23
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 lead screw 31
25 are axially connected with spring 24.
Meanwhile the both ends in an axial direction of lead screw 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, lead screw 31 form lead screw chamber 33 between the end and nut 6 in needle portion 21, and valve port opening increases
When big, lead screw 31 drives needle portion 21 to enter in the lead screw chamber 33.Wherein, as depicted in figs. 1 and 2, lead screw 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 lead screw 31 is interior with nut 6
There is wall certain radial clearance, the radial clearance to form lead screw chamber 33, and specifically thread fiting part is with lower part and valve needle cover
25 or more part, formation lead screw chamber 33 between the rwo.
The above-mentioned electric expansion valve course of work is：When lead screw 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, when needle portion 21 is contacted with valve port, when hypertonia in needle chamber 23, lead to valve
Needle part 21 can not be opened by dieback, therefore, in order to ensure that electric expansion valve can work normally, need to be avoided in needle chamber 23
Hypertonia, to avoid fluid-tight phenomenon occurs between each parts in refrigerant environment.Specifically can by communicating valve needle cavity 23 with
Lead screw 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 lead screw chamber 33 mainly by valve needle cover 25, bushing 32 and lead screw 3 it
Between gap realize, still, the gap is smaller, pressure balance between needle chamber 23 and lead screw 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 lead screw 31 is in refrigerant
Because differential pressure action is likely to occur fluid-tight phenomenon in environment, needle chamber 23 and lead screw chamber 33 is caused to be respectively formed closed cavity, to lead
It causes the pressure between lead screw chamber 31 and needle chamber 33 that can not balance, and then influences electric expansion valve normal work.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 lead screw 31 becomes being rigidly connected, and influences the reliability and precision of electric expansion valve.
In addition, as described above, when electric expansion valve from valve port fully closed to during standard-sized sheet, 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 lead screw chamber are relatively slow during this or can not balance.
Based on this, in order to solve the above-mentioned technical problem, in electric expansion valve provided by the utility model, needle chamber 23 and silk
Between rod cavity 33 in addition to being connected to by the gap between valve needle cover 25, bushing 32 and lead screw 31, also it is connected to by balance channel, and
In the electric expansion valve course of work, which is connected always.
Therefore, in the utility model, by the way that balance channel is arranged so that can pass through between needle chamber 23 and lead screw chamber 33
Balance channel fast implements pressure balance, and closing chamber is formed to avoid needle chamber 23 that fluid-tight phenomenon occurs in refrigerant environment
Room becomes being rigidly connected to avoid the elastic connection between screw component 3 and needle component 2, improves the reliable of electric expansion valve
Property.And by the setting of above-mentioned balance channel, when electric expansion valve just touches valve port standard-sized sheet from needle portion 21 and valve port
In the process, pressure between needle chamber 23 and lead screw 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
Positioned at valve core case intracavitary, and can be axially moved in the valve core case intracavitary, 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 lead screw 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 lead screw 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 inner cavity of the guide member 22 forms needle chamber 23, needle component 2 is located at intracavitary in the guide member, and
It can be axially moved.Meanwhile the guide member 22 is 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 lead screw 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 is 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 guiding
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, other hidden danger will not be caused.
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 utility model does not limit the number and shape of intercommunicating pore
It is fixed.
Please continue to refer to attached drawing 6-10, wherein Fig. 6 provides valve needle cover in electric expansion valve, bushing by the utility model
With fit structure schematic diagram of the lead screw in the first specific embodiment；Fig. 7 is the structural schematic diagram of valve needle cover in Fig. 6；Fig. 8 is
The fit structure of valve needle cover, bushing and lead screw in second of specific embodiment shows in the provided electric expansion valve of the utility model
It is intended to；Fig. 9 is the structural schematic diagram of bushing in Fig. 8；Figure 10 provides valve needle cover in electric expansion valve, bushing by the utility model
With fit structure schematic diagram of the lead screw in second of specific embodiment.
In another embodiment, as illustrated in figures 6-10, valve needle cover 25 is placed on 31 periphery of lead screw, and lead screw 31 can be in needle
Therefore rotation in set 25 has third predetermined gap S3, and the third predetermined gap S3 and silk between lead screw 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 lead screw chamber 33
Fixed gap S3 is connected to connectivity slot 28, which forms above-mentioned circulation passage with third predetermined gap S3.
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, only above-mentioned circulation 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 will not be caused.
Specifically, above-mentioned connectivity slot 28 may be provided with multiple, and can be the groove of arbitrary shape, therefore, the utility model
In 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, in electric expansion valve in the utility model, communicating passage can also be the arbitrary of above two embodiment
Combination, 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, lining
Set 23 and/or valve needle cover 25 offer 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 offer connectivity slot 28.
In the above various embodiments, as shown in Fig. 2, needle portion 21 is integrally formed with the body part 29 coordinated 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 stretched into the valve support chamber of valve seat 11 by through hole with close to or away from the valve port.
Specifically, there is body part 29 boss 291 to extend radially outwardly, 29 one end of body part to pass 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 by the way that spring 24 and boss 291 are axial between 29 and guide member 22.
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 by ball bearing 27 between lead screw 31 and body part 29, so that lead screw 31
It can be freely rotated, meanwhile, lead screw 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 utility model is described in detail above.It is used herein specifically
A example is expounded the principles of the present invention and embodiment, and the explanation of above example is only intended to help to understand this
The method and its core concept of utility model.It should be pointed out that for those skilled in the art, not departing from
Under the premise of the utility model principle, several improvements and modifications can be made to this utility model, these improvement and modification
It falls into the protection domain of the utility model claims.
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), the nut (6) of the valve core case (1) and the screw component (3) screw-thread fit
It is fixedly connected, the screw component (3) with the nut (6) screw-thread fit by driving the needle component (2) to transport in an axial direction
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)
Lead screw chamber (33) is formed between the nut (6), the needle chamber (23) passes through circulation passage phase with the lead screw chamber (33)
Connection.
2. 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 axially moved in the valve core case intracavitary, inner wall part and the needle of the valve core case (1)
There is the first predetermined gap (S1), first predetermined gap (S1) to connect with the lead screw chamber (33) between component (2) outside wall portions
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) forms the circulation passage with first predetermined gap (S1).
3. electric expansion valve according to claim 2, which is characterized in that the valve core case (1) offers valve port, the valve
Needle portion (21) includes the body part (29) coordinated with the valve port, and the needle portion (21) is an integral molding structure.
4. a kind of electric expansion valve, which is characterized in that including valve seat (11), needle screw component and guide member (22), institute
It includes needle component (2) and screw component (3) to state needle screw component, the guide member (22) and the screw component (3)
The nut (6) of screw-thread fit is fixedly connected, and the screw component (3) with the nut (6) screw-thread fit by driving the valve
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), and the screw component (3) is close to one end of the needle component (2) and the spiral shell
Lead screw chamber (33) is formed between female (6), the needle chamber (23) is connected with the lead screw chamber (33) by circulation passage.
5. electric expansion valve according to claim 4, 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 lead screw 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) forms the circulation passage with second predetermined gap (S2).
6. the electric expansion valve according to claim 2 or 5, which is characterized in that the screw component (3) includes lead screw (31)
And bushing (32), the needle component (2) further include being coated at the valve needle cover (25) of the lead screw (31), and the lead screw
(31) there is third predetermined gap (S3), the third predetermined gap (S3) and the lead screw chamber between the valve needle cover (25)
(33) it is connected to, the bushing (32) offsets with the valve needle cover (25) in axial direction, the needle chamber (23) and the lead screw
Chamber (33) is isolated by the bushing (32) and the valve needle cover (25).
7. electric expansion valve according to claim 6, 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 offers connectivity slot (28), and the connectivity slot (28) is connected to the third predetermined gap
(S3) with the needle chamber (23).
8. electric expansion valve according to claim 6, which is characterized in that the valve needle cover (25) is equal with the bushing (32)
Offer connectivity slot (28), and the connectivity slot (28) connection of the two.
9. electric expansion valve according to claim 5, which is characterized in that the valve seat (11) offers valve port, the valve
Needle assemblies (2) include sleeve part and the valve head that coordinates with the valve port, the guide member (22) while 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 stretched 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 |
|---|---|---|---|
| CN201820004551.9U CN207864635U (en) | 2018-01-02 | 2018-01-02 | A kind of electric expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820004551.9U CN207864635U (en) | 2018-01-02 | 2018-01-02 | A kind of electric expansion valve |
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| Publication Number | Publication Date |
|---|---|
| CN207864635U true CN207864635U (en) | 2018-09-14 |
Family
ID=63464463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820004551.9U Active CN207864635U (en) | 2018-01-02 | 2018-01-02 | A kind of electric expansion valve |
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| CN (1) | CN207864635U (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990103A (en) * | 2018-01-02 | 2019-07-09 | 浙江三花智能控制股份有限公司 | A kind of electric expansion valve |
| CN110939745A (en) * | 2018-09-25 | 2020-03-31 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN110939775A (en) * | 2018-09-25 | 2020-03-31 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN110939747A (en) * | 2018-09-25 | 2020-03-31 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN111365466A (en) * | 2018-12-25 | 2020-07-03 | 浙江盾安禾田金属有限公司 | Electronic expansion valve and air conditioning system using same |
| WO2021098303A1 (en) * | 2019-11-19 | 2021-05-27 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| CN113339510A (en) * | 2020-02-18 | 2021-09-03 | 浙江盾安禾田金属有限公司 | 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 |
| WO2022127265A1 (en) * | 2020-12-14 | 2022-06-23 | 广东威灵电机制造有限公司 | Valve needle assembly, electronic expansion valve and refrigeration apparatus |
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