CN216432171U - Electronic expansion valve and refrigerating system - Google Patents
Electronic expansion valve and refrigerating system Download PDFInfo
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- CN216432171U CN216432171U CN202123054460.7U CN202123054460U CN216432171U CN 216432171 U CN216432171 U CN 216432171U CN 202123054460 U CN202123054460 U CN 202123054460U CN 216432171 U CN216432171 U CN 216432171U
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Abstract
The utility model relates to an electronic expansion valve and refrigerating system, wherein electronic expansion valve includes: the rear end cover assembly is fixedly connected with the shell assembly and used for limiting the core assembly in the shell assembly; the core assembly includes: a valve core; the power device is used for driving the valve core to move; and the sensor is arranged on the valve core and used for detecting the displacement of the valve core. The utility model discloses an increase the design sensor on electronic expansion valve's case to improved the detection to electronic expansion valve's case displacement volume, makeed control and regulation to refrigerant flow such as refrigerant more accurate.
Description
Technical Field
The utility model relates to a control system technical field, in particular to electronic expansion valve and refrigerating system.
Background
In the field of refrigeration control systems and the like, control valves are used for accurately controlling the flow of a refrigerant, achieving high speed, greatly adjusting load and the like, so that the refrigeration cycle is kept in an optimal state, and the throttling control advantage of the refrigeration cycle is fully exerted.
The electronic expansion valve is a control valve commonly used in the art, and the electronic expansion valve is a throttling element that can be programmed to control the flow of refrigerant into the refrigeration system. On some occasions with severe load change or wide operation condition range, the traditional throttling elements (such as capillary tubes, thermal expansion valves and the like) cannot meet the requirements on comfort and energy conservation, and the electronic expansion valve is combined with the variable capacity technology of the compressor to be more and more widely applied.
After a motor stator in the electronic expansion valve core body assembly is electrified, a rotor of the electronic expansion valve core body assembly rotates by an angle, the electrifying sequence of a motor stator winding is changed, the rotating direction of the rotor is changed accordingly, and the valve core is pushed to move forwards or backwards through the transmission effect of the screw rod nut, so that the flow is adjusted. The existing electronic expansion valve can only calculate the forward or backward movement distance of the valve core through the rotating speed of the motor, and the electronic expansion valve has the advantages of large adjustment range, quick and sensitive action and high adjustment precision. The variation in displacement of the spool movement cannot be accurately measured.
SUMMERY OF THE UTILITY MODEL
The utility model discloses it is providing an expansion valve and refrigerating system to solve the not enough that exists among the prior art, the utility model discloses the technical problem who solves realizes through following technical scheme.
The utility model provides an electronic expansion valve, include: the core assembly comprises a shell assembly, a core assembly and a rear end cover assembly, wherein the rear end cover assembly is fixedly connected with the shell assembly and used for limiting the core assembly in the shell assembly; the core assembly includes:
a valve core;
the power device is used for driving the valve core to move;
and the sensor is arranged on the valve core and used for detecting the displacement of the valve core.
In some optional embodiments, the core assembly further comprises: a conditioning circuit assembly electrically connected to the sensor, the conditioning circuit assembly being located within the housing assembly.
In some alternative embodiments, the valve cartridge comprises: a first limit shaft shoulder and a second limit shaft shoulder;
the sensor includes: the magnetic core is arranged between the first limiting shaft shoulder and the second limiting shaft shoulder, and the coil assembly is sleeved outside the magnetic core.
In some alternative embodiments, the coil assembly comprises:
an inner end cap;
an outer end cover;
a mounting portion for connecting the inner end cap and the outer end cap;
the first insulating piece is arranged on the mounting part and is close to the inner end cover;
the first magnetic conduction piece is arranged on the mounting part and is positioned between the inner end cover and the first insulating piece;
the second insulating piece is arranged on the mounting part and is close to the outer end cover;
the second magnetic conduction piece is arranged on the mounting part and is positioned between the outer end cover and the second insulating piece;
and the coil is wound on the mounting part and is positioned between the first insulating part and the second insulating part.
In some alternative embodiments, the coil comprises: the transformer comprises a primary coil and a secondary coil wound outside the primary coil; and/or the presence of a gas in the gas,
the coil assembly further includes: the magnetic conduction shell covers and buckles the outside of the coil; and/or the presence of a gas in the gas,
the first magnetic conduction piece and the second magnetic conduction piece are two.
In some alternative embodiments, the power plant comprises: the valve comprises a stepping motor and a transmission mechanism, wherein the transmission mechanism is used for being in transmission connection with the stepping motor and the valve core.
In some alternative embodiments, the transmission mechanism comprises:
the speed reduction gear set is connected with the stepping motor;
and the screw nut is used for connecting the reduction gear set and the valve core.
In some optional embodiments, the core assembly further comprises a first housing and a second housing, the second housing is used for accommodating at least the sensor and the transmission mechanism, the first housing and one end of the second housing, which is far away from the reduction gear set, are connected in a sealing mode, and the first housing is used for accommodating at least a partial area of the valve core.
In some optional embodiments, the transmission mechanism further comprises: the bearing is arranged on the screw nut, and the bearing pressing plate is used for installing the bearing in the second shell.
The utility model also provides a refrigerating system, including above-mentioned arbitrary electronic expansion valve.
Compared with the prior art, the utility model gain following technological effect:
1. the valve core of the electronic expansion valve is additionally provided with the design sensor, so that the detection of the displacement of the valve core of the electronic expansion valve is improved, and the control and the regulation of the flow of refrigerants and the like are more accurate;
2. the sensor is in a spiral tube type differential transformer form, so that the structure of the sensor is simplified, and the detection precision, repeatability, reliability and environmental adaptability are improved;
3. the sealing performance of the whole electronic expansion valve is improved through the arrangement of the first shell and the second shell.
Drawings
Fig. 1 is a schematic structural diagram of a core assembly of an electronic expansion valve provided by the present invention;
fig. 2 is an exploded schematic view of a part of the structure of the electronic expansion valve provided by the present invention;
fig. 3 is a schematic view of an exploded structure of the magnetic core according to the present invention;
fig. 4 is an exploded view of a part of the coil assembly provided by the present invention;
fig. 5 is a schematic view of a partial structure of a coil assembly provided by the present invention;
fig. 6 is a schematic structural diagram of a coil assembly provided by the present invention;
fig. 7 is a schematic structural view of the electronic expansion valve provided by the present invention.
The reference numbers in the drawings are, in order:
1-housing component 2-core component 21-valve core 211-first limit shoulder 212-second limit shoulder 22-power device 221-stepping motor 222-transmission mechanism 2221-reduction gear set 2222-lead screw nut 2223-bearing 2224-bearing pressure plate 23-sensor 231-magnetic core 232-coil component 2321-inner end cap 2322-outer end cap 2323-mounting portion 2324-first insulating member 2325-second insulating member 2326-first magnetic conductive member 2327-second magnetic conductive member 2328-coil 23281-primary coil 23282-secondary coil 2329-magnetic conductive housing 24-adjusting circuit component 25-first housing 26-second housing 3-rear end cap component 1 a-first connecting portion 2 a-first end surface 3 a-first end surface 4 a-second end surface 5 a-second connecting portion Section 4 b-the other end
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 and 2, the present invention provides an electronic expansion valve, including: the core assembly comprises a shell assembly 1, a core assembly 2 and a rear end cover assembly 3, wherein the rear end cover assembly 3 is fixedly connected with the shell assembly 1 and used for limiting the core assembly 2 in the shell assembly 1; the core assembly 2 includes:
a valve core 21;
a power device 22 for driving the valve core 21 to move;
and a sensor 23 attached to the valve body 21 for detecting displacement of the valve body 21.
The electronic expansion valve is a device driven by a stepping motor 221, and the flow rate is controlled by providing a logic digital signal to the stepping motor 221 to drive the valve core 21 to move forward or backward. The sensor 23 in the core body is used for measuring the displacement of the valve core 21, converting a displacement signal into a voltage signal and feeding back the voltage signal to the electronic controller. The sensor 23 is an inductive sensor 23 which converts a mechanical displacement change of a non-electrical quantity into a proportional electrical parameter change. The utility model provides an electronic expansion valve through increase design sensor 23 on electronic expansion valve's case 21 to the detection to electronic expansion valve's case 21 displacement volume has been improved, makes control and regulation to refrigerant flow such as refrigerant more accurate.
The sensor 23 may be various, optional, and in the embodiment provided by the present invention, the sensor 23 is a displacement sensor.
As shown in fig. 2, in order to facilitate the transmission and conversion of signals, the core assembly 2 further includes: and a conditioning circuit assembly 24 electrically connected to the sensor 23, the conditioning circuit assembly 24 being located within the housing assembly 1. The conditioning circuit assembly 24 includes a circuit board and electrical components located on the circuit board.
As shown in fig. 3, the valve body 21 includes: a first stop shoulder 211 and a second stop shoulder 212;
the sensor 23 includes: a magnetic core 231 arranged between the first limit shaft shoulder 211 and the second limit shaft shoulder 212, and a coil assembly 232 sleeved outside the magnetic core 231. The setting of first spacing shoulder 211 and the spacing shoulder 212 of second is convenient for install spacingly to case 21, and the size of above-mentioned first spacing shoulder 211 and the spacing shoulder 212 of second can be set for according to actual need. Optionally, the magnetic core 231 may be an integrated cylinder structure, or a split structure, so that the magnetic core is split and convenient to mount and dismount. When installed, the core 231 may be secured between the first stop shoulder 211 and the second stop shoulder 212 by adhesive bonding.
The coil assembly 232 may have various specific structures, and in one embodiment of the present invention, as shown in fig. 4, 5 and 6, the present invention provides a specific structure. The coil block 232 includes:
an outer end cap 2322;
a mounting portion 2323 for connecting the inner end cap 2321 and the outer end cap 2322;
a first insulator 2324 mounted on the mounting portion 2323 and disposed adjacent to the inner end cap 2321;
a first magnetic conductive member 2326 mounted on the mounting portion 2323 and located between the inner end cap 2321 and the first insulating member 2324;
a second insulator 2325 mounted on the mounting portion 2323 and disposed adjacent to the outer end cap 2322;
a second magnetic conductive member 2327 mounted on the mounting portion 2323 and located between the outer end cap 2322 and the second insulating member 2325;
the coil 2328 is wound around the mounting portion 2323 and located between the first insulator 2324 and the second insulator 2325.
The mounting portion 2323 may have a hollow cylindrical shape, and the specific shape thereof is not limited herein. The mounting portion 2323 may be integrally formed with the outer end cap 2322.
As shown in fig. 6, the coil 2328 includes: a primary coil 23281 and a secondary coil 23282 wound around the outside of the primary coil 23281.
To facilitate magnetic conduction, the coil assembly 232 further includes: a magnetically conductive housing 2329 covering the coil 2328.
The utility model provides an among the coil pack 232, first magnetic conduction piece 2326 and second magnetic conduction piece 2327 are two.
The sensor 23 provided by the utility model adopts the form of the solenoid type differential transformer, thereby simplifying the structure of the sensor 23 and improving the detection precision, repeatability, reliability and environmental adaptability;
the specific structure of the power device 22 may be various, and as shown in fig. 1, the power device 22 includes: the stepping motor 221 and the transmission mechanism 222, and the transmission mechanism 222 is used for driving and connecting the stepping motor 221 and the valve core 21.
Optionally, the transmission mechanism 222 includes:
a reduction gear set 2221 connected to the stepping motor 221;
the lead screw nut 2222 and the lead screw nut 2222 are used for connecting the reduction gear set and the spool 21. The forward or backward movement of the spool 21 is pushed by the transmission action of the lead screw nut 2222, thereby adjusting the flow rate.
As shown in fig. 1, the core assembly 2 further includes a first housing 25 and a second housing 26, the second housing 26 is configured to accommodate at least the sensor 23 and the transmission mechanism, the first housing 25 is hermetically connected to an end of the second housing 26 remote from the reduction gear set, and the first housing 25 is configured to accommodate at least a partial area of the valve spool 21. The spool 21 is movable relative to the first housing 25.
As shown in fig. 1, the transmission mechanism further includes: a bearing 2223 mounted on the screw nut 2222, and a bearing pressing plate 2224 for mounting the bearing 2223 in the second housing 26. The specific structure of the bearing pressure plate 2224 may be a three-quarter arc, and the bearing pressure plate 2224 is provided with a mounting portion 2323 and a limiting component, where the mounting portion 2323 and the limiting component may be through holes or protrusions, and the details are not repeated here.
The utility model provides an electronic expansion valve's the concrete process of installation as follows:
installation of coil assembly 232:
1. fixing the outer end cap 2322, and integrally forming the outer end cap 2322 and the mounting part 2323;
2. mounting the first insulator member, the second insulator member 2325, the first magnetically permeable member 2326 and the second magnetically permeable member 2327 on the mounting portion 2323; a first insulator 2324 is disposed proximate to inner end cap 2321; a first magnetic conductive member 2326 located between the inner end cap 2321 and the first insulating member 2324; a second insulator 2325 is disposed proximate the outer end cap 2322; the second magnetic conductive member 2327 is located between the outer end cap 2322 and the second insulating member 2325;
3. the inner end cap 2321 is provided with a mounting hole, the inner end cap 2321 is connected with the mounting portion 2323 through the mounting hole, and the connection can be hermetically connected through laser welding.
4. Fixing the assembled structure on a shaft head of a winding machine;
5. winding the polyimide enameled wire according to a row winding diagram, and sequentially winding the primary coil 23281 and the secondary coil 23282;
6. welding the lead wires with the primary coil 23281 and the secondary coil 23282 according to a pre-designed wiring diagram;
7. the magnetic conductive housing 2329 is bound and fixed by polyimide tape.
After the above steps are completed, the coil assembly 232 is formed.
Installation of the magnetic core 231 assembly:
1. the valve core 21 is fixed;
2. the two plate cores 231 are fixed to the core 21 by adhesive bonding.
After the steps are completed, the valve core assembly is formed.
Mounting of core assembly 2
1. The second shell 26 is fixed, and then the coil assembly 232 is arranged in the second shell 26, and the first end surface 3a is tightly attached to the second end surface 4 a;
2. the first shell 25 is arranged at the other end 4b of the second shell 26, and the third end surface 2a and the other end 4b are welded together by laser after being arranged in place;
3. the bearing 2223 is mounted on the lead screw nut 2222, and then fixed together on the second housing 26 by the bearing pressing plate 2224;
4. the reduction gear set 2221 is mounted on the second housing 26, and then the stepping motor 221 is mounted;
5. the spool 21 is connected to the screw nut 2222 through the sensor 23, and the first connection portion 1a and the second connection portion 5a are attached together by screwing.
After the above steps are completed, the core body assembly 2 is formed.
Installation of the electronic expansion valve:
1. fixing the shell assembly 1, then installing the core assembly 2, and installing the shell assembly 1 and the core assembly 2 together through threads;
2. the lead wires of the core assembly 2 are welded to the demodulation circuit assembly and then are installed inside the housing assembly 1.
3. And (3) installing the rear end cover assembly 3 into the shell assembly 1, and fixing by circumferential laser welding.
4. And testing after the assembly is finished.
The structure of the assembled electronic expansion valve is shown in fig. 7.
The utility model also provides a refrigerating system, including above-mentioned arbitrary electronic expansion valve. The electronic expansion valve with the structure can improve the refrigeration effect of the refrigeration system.
It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or otherwise described herein.
Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways, such as by rotating it 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.
In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An electronic expansion valve comprising: the core assembly comprises a shell assembly, a core assembly and a rear end cover assembly, wherein the rear end cover assembly is fixedly connected with the shell assembly and used for limiting the core assembly in the shell assembly; characterized in that the core assembly comprises:
a valve core;
the power device is used for driving the valve core to move;
and the sensor is arranged on the valve core and used for detecting the displacement of the valve core.
2. The electronic expansion valve of claim 1, wherein the core assembly further comprises: a conditioning circuit assembly electrically connected to the sensor, the conditioning circuit assembly being located within the housing assembly.
3. The electronic expansion valve of claim 1, wherein the valve spool comprises: the first limiting shaft shoulder and the second limiting shaft shoulder;
the sensor includes: the magnetic core is arranged between the first limiting shaft shoulder and the second limiting shaft shoulder, and the coil assembly is sleeved outside the magnetic core.
4. The electronic expansion valve of claim 3, wherein the coil assembly comprises:
an inner end cap;
an outer end cover;
a mounting portion for connecting the inner end cap and the outer end cap;
the first insulating piece is arranged on the mounting part and is close to the inner end cover;
the first magnetic conduction piece is arranged on the mounting part and is positioned between the inner end cover and the first insulating piece;
the second insulating piece is arranged on the mounting part and is close to the outer end cover;
the second magnetic conduction piece is arranged on the mounting part and is positioned between the outer end cover and the second insulating piece;
and the coil is wound on the mounting part and is positioned between the first insulating part and the second insulating part.
5. The electronic expansion valve of claim 4, wherein the coil comprises: the secondary coil is wound outside the primary coil; and/or the presence of a gas in the gas,
the coil assembly further includes: the magnetic conduction shell covers and buckles the outside of the coil;
and/or the number of the first magnetic conduction parts and the number of the second magnetic conduction parts are two.
6. An electronic expansion valve according to any of claims 1 to 5, wherein the power means comprises: the valve comprises a stepping motor and a transmission mechanism, wherein the transmission mechanism is used for being in transmission connection with the stepping motor and the valve core.
7. The electronic expansion valve of claim 6, wherein the transmission mechanism comprises:
the speed reduction gear set is connected with the stepping motor;
and the screw nut is used for connecting the reduction gear set and the valve core.
8. The electronic expansion valve of claim 7, wherein the core assembly further comprises a first housing and a second housing, the second housing is configured to house at least the sensor and the transmission mechanism, the first housing is sealingly connected to an end of the second housing remote from the reduction gear set, and the first housing is configured to house at least a partial area of the valve spool.
9. The electronic expansion valve of claim 8, wherein the drive mechanism further comprises:
the bearing is arranged on the lead screw nut;
and the bearing pressing plate is used for mounting the bearing in the second shell.
10. A refrigeration system comprising an electronic expansion valve as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123054460.7U CN216432171U (en) | 2021-12-07 | 2021-12-07 | Electronic expansion valve and refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123054460.7U CN216432171U (en) | 2021-12-07 | 2021-12-07 | Electronic expansion valve and refrigerating system |
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| Publication Number | Publication Date |
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| CN216432171U true CN216432171U (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123054460.7U Active CN216432171U (en) | 2021-12-07 | 2021-12-07 | Electronic expansion valve and refrigerating system |
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| CN (1) | CN216432171U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151549A (en) * | 2021-12-07 | 2022-03-08 | 北京星空建腾电子科技有限公司 | Electronic expansion valve and refrigerating system |
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2021
- 2021-12-07 CN CN202123054460.7U patent/CN216432171U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151549A (en) * | 2021-12-07 | 2022-03-08 | 北京星空建腾电子科技有限公司 | Electronic expansion valve and refrigerating system |
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