CN218380008U - Electronic expansion valve and air conditioning system - Google Patents
Electronic expansion valve and air conditioning system Download PDFInfo
- Publication number
- CN218380008U CN218380008U CN202222794997.5U CN202222794997U CN218380008U CN 218380008 U CN218380008 U CN 218380008U CN 202222794997 U CN202222794997 U CN 202222794997U CN 218380008 U CN218380008 U CN 218380008U
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- Prior art keywords
- circuit board
- board assembly
- stator
- expansion valve
- electronic expansion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The utility model discloses an electronic expansion valve and air conditioning system, wherein, this electronic expansion valve includes casing, stator module, circuit board subassembly and elastic metal spare, stator module install in the casing, including stator shell. The circuit board assembly is arranged in the shell and is electrically connected with the stator assembly. The elastic metal piece is arranged between the circuit board assembly and the stator shell, and two ends of the elastic metal piece are respectively and electrically connected with the circuit board assembly and the stator shell, so that the circuit board assembly is connected with the stator assembly in a grounding mode. The utility model provides a simple structure, simple to operate's electronic expansion valve is provided.
Description
Technical Field
The utility model relates to a fluid control part technical field, in particular to electronic expansion valve and air conditioning system.
Background
The stator assembly in the electronic expansion valve can generate static electricity and a magnetic field in the electrifying process, and the static electricity and the magnetic field can influence or interfere the transmission of the control signal, so that the action of the valve needle is influenced, and the control precision of the electronic expansion valve is reduced. In order to solve the above problems, it is common to provide a grounding member on the electronic expansion valve, and to conduct static electricity and a magnetic field by using the grounding member. However, the grounding assembly on the existing electronic expansion valve has a complex structure, is unreliable in installation and is easy to interfere.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing an electronic expansion valve, aim at providing a simple structure, simple to operate's electronic expansion valve.
In order to achieve the above object, the present invention provides an electronic expansion valve, including:
a housing;
a stator assembly mounted within the housing, including a stator housing;
the circuit board assembly is arranged in the shell and is electrically connected with the stator assembly; and (c) a second step of,
and the elastic metal piece is arranged between the circuit board assembly and the stator shell, and two ends of the elastic metal piece are respectively and electrically connected with the circuit board assembly and the stator shell, so that the circuit board assembly is in ground connection with the stator assembly.
Optionally, the stator housing includes an upper housing portion and a lower housing portion that are spliced together, one end of the elastic metal member abuts against one side of the upper housing portion facing the circuit board assembly, and the other end abuts against one side of the circuit board assembly facing the stator housing.
Optionally, a first installation cavity and a second installation cavity which are arranged in a mutually separated mode are arranged in the shell, the stator assembly is arranged in the first installation cavity, the circuit board assembly is arranged in the second installation cavity, an installation hole communicated with the first installation cavity is formed in the cavity wall of the second installation cavity, and the elastic metal piece is installed in the installation hole.
Optionally, the stator housing abuts against the periphery of the opening on the side, away from the circuit board assembly, of the mounting hole.
Optionally, a mounting convex portion protruding toward the circuit board assembly is arranged on a cavity wall of the second mounting cavity, the mounting hole is formed in the mounting convex portion, and the protruding height of the mounting convex portion is smaller than or equal to the distance from the circuit board assembly to the cavity wall.
Optionally, a supporting portion is arranged in the second mounting cavity, and the supporting portion is annularly arranged on the periphery of the circuit board assembly so as to fixedly support the circuit board assembly.
Optionally, the electronic expansion valve further includes a cover plate, and the cover plate covers the opening of the second installation cavity.
Optionally, open-ended edge ring is equipped with the holding surface and supports the surrounding edge, the holding surface is located support the periphery of surrounding edge, sealed annular groove has been seted up to the internal periphery of apron, support the surrounding edge peg graft in sealed annular groove, just support the surrounding edge butt in the diapire of sealed annular groove.
Optionally, the resilient metal member is a spring or a reed.
The utility model also provides an air conditioning system, include as above electronic expansion valve.
The utility model discloses technical scheme is through setting up the casing, and stator module and circuit board subassembly fixed mounting are in this casing, and stator module is connected with the circuit board subassembly electricity, and stator module includes stator housing. The elastic metal piece is arranged between the circuit board assembly and the stator shell, and two ends of the elastic metal piece are respectively and electrically connected with the circuit board assembly and the stator shell, so that the circuit board assembly is connected with the stator component in a grounding mode. This elastic metal part has certain elastic potential energy, can require to adjust self length according to actual assembly, when guaranteeing that circuit board subassembly and stator shell ground connection are connected, reduces the required precision to circuit board subassembly, casing and elastic metal part in assembly and the production process, and only need during the installation with elastic metal part's both ends respectively the circuit board subassembly with stator shell can, simple structure, simple to operate, the good reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a cross-sectional view of an embodiment of the electronic expansion valve of the present invention;
fig. 2 is a partial cross-sectional view of the assembled combination of the circuit board assembly and the stator assembly of fig. 1;
fig. 3 is an exploded view of the circuit board assembly and stator assembly of fig. 2.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name(s) |
| 100 | |
123 | |
| 110 | |
124 | |
| 111 | |
125 | |
| 112 | |
126 | |
| 113 | |
130 | |
| 114 | |
140 | |
| 115 | Supporting |
150 | |
| 116 | Opening(s) | 151 | |
| 117 | |
160 | |
| 118 | Supporting surrounding |
161 | |
| 120 | |
162 | |
| 121 | |
163 | |
| 122 | Framework |
The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; \8230;) are provided in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an electronic expansion valve 100.
In the embodiment of the present invention, as shown in fig. 1 to fig. 3, the electronic expansion valve 100 includes a housing 110, a stator assembly 120, a circuit board assembly 130, and a resilient metal member 140, wherein the stator assembly 120 is installed in the housing 110, and includes a stator housing 121. The circuit board assembly 130 is mounted within the housing 110 and electrically connected to the stator assembly 120. The elastic metal member 140 is disposed between the circuit board assembly 130 and the stator housing 121, and two ends of the elastic metal member 140 are electrically connected to the circuit board assembly 130 and the stator housing 121, respectively, so that the circuit board assembly 130 is connected to the stator assembly 120 in a grounding manner.
Specifically, the circuit board assembly 130 and the stator assembly 120 are both installed in the housing 110 and electrically connected to each other. The stator assembly 120 includes a stator housing 121, and a skeleton 122 and a coil 123 disposed in the stator housing 121, wherein one end of the pin 124 is inserted into the skeleton 122 and electrically connected to the coil 123, and the other end is inserted into the circuit board assembly 130 and electrically connected to the circuit board assembly 130, thereby achieving electrical connection and signal transmission between the circuit board assembly 130 and the stator assembly 120. The housing 110 is integrally formed with the stator assembly 120, typically by an injection molding process, to fix the stator assembly 120 within the housing 110 and to mount the circuit board assembly 130 within the housing 110. The electronic expansion valve 100 further includes a valve body 160, and a valve needle assembly 161, a screw assembly 162, and a rotor assembly 163 mounted to the valve body 160. One end of the screw assembly 162 is connected to the valve needle assembly 161, and the other end is connected to the rotor assembly 163, when the air conditioner host sends a control signal to the circuit board assembly 130, the circuit board assembly 130 controls the stator assembly 120 to work, and then drives the rotor assembly 163 to move, and the rotor assembly 163 drives the screw assembly 162 to move, thereby driving the valve needle assembly 161 to move, so as to open or close the electronic expansion valve 100, and further achieve the purpose of adjusting the flow rate and pressure of the fluid medium. However, the stator assembly 120 generates static electricity and a magnetic field during the process of power-on, and the static electricity and the magnetic field affect or interfere the transmission of the control signal of the circuit board assembly 130, thereby affecting the operation of the valve needle assembly 161 and reducing the control accuracy of the electronic expansion valve 100. To solve this problem, it is common to provide a grounding assembly on the electronic expansion valve 100, and to conduct the static electricity and the magnetic field out by using the grounding assembly.
In the prior art, in order to achieve the grounding connection between the circuit board assembly 130 and the stator assembly 120, that is, the circuit board assembly 130 is electrically connected to the stator housing 121, the following measures are generally taken: a ground portion is extended or fixed to the stator case 121, and the ground portion is electrically connected to the stator case 121 and to the circuit board assembly 130, thereby achieving ground connection. However, since the electronic expansion valve 100 is formed by splicing a plurality of components, there are a lot of parts, so that there is a large installation error, and there is a processing error in the processing process of the housing 110 and the circuit board assembly 130, so that in the actual installation process, there may occur installation interference or installation deviation, which may cause poor grounding between the grounding portion and the circuit board assembly 130, and affect the operation of the electronic expansion valve 100.
In this embodiment, the elastic metal member 140 is disposed between the circuit board assembly 130 and the stator housing 121, and two ends of the elastic metal member 140 are electrically connected to the circuit board assembly 130 and the stator housing 121, respectively, and the elastic metal member 140 has a certain elastic potential energy, so that the length of the elastic metal member 140 can be adjusted according to actual assembly requirements, and the accuracy requirements on the circuit board assembly 130, the housing and the elastic metal member 140 during assembly and production processes are reduced while the grounding connection between the circuit board assembly 130 and the stator housing 121 is ensured, and the elastic metal member is convenient to install and high in reliability. One end of the elastic metal member 140 is connected to the stator housing 121, and the elastic metal member 140 may be connected by welding, may be connected by clamping or screwing, or may directly abut against the stator housing 121. The other end is connected to the circuit board assembly 130, and a side of the circuit board assembly 130 facing the elastic metal member 140 is provided with a conductive portion connected to the elastic metal member 140.
The utility model discloses technical scheme is through setting up casing 110, stator module 120 and circuit board assembly 130 fixed mounting in this casing 110, and stator module 120 is connected with circuit board assembly 130 electricity, and stator module 120 includes stator housing 121. The elastic metal 140 is disposed between the circuit board assembly 130 and the stator housing 121, and two ends of the elastic metal 140 are electrically connected to the circuit board assembly 130 and the stator housing 121, respectively, so that the circuit board assembly 130 is connected to the stator assembly 120 in a grounding manner. This elastic metal piece 140 has certain elastic potential energy, can adjust self length according to actual assembly requirement, when guaranteeing that circuit board subassembly 130 and stator shell 121 ground connection, reduces the required precision to circuit board subassembly 130, casing 110 and elastic metal piece 140 in assembly and the production process, and only need during the installation with elastic metal piece 140 both ends respectively the circuit board subassembly 130 with stator shell 121 can, simple structure, simple to operate, the good reliability.
In one embodiment, the stator housing 121 includes an upper shell 125 and a lower shell 126 that are joined together, one end of the elastic metal element 140 abuts against a side of the upper shell 125 facing the circuit board assembly 130, and the other end abuts against a side of the circuit board assembly 130 facing the stator housing 121. Specifically, because this stator module 120 still includes skeleton 122 and solenoid 123 etc. of being fixed in stator housing 121, for the installation of convenient skeleton 122 and solenoid 123, this stator housing 121 includes upper shell portion 125 and lower shell portion 126 of splicing each other, during the installation, assembles skeleton 122 and solenoid 123, and then upper shell portion 125 and lower shell portion 126 concatenation lock, simple structure, simple to operate. One end of the elastic metal member 140 abuts against one side of the upper shell 125 facing the circuit board assembly 130, and the other end abuts against one side of the circuit board assembly 130 facing the stator housing 121, that is, both ends of the elastic metal member 140 respectively abut against the upper shell 125 and the circuit board assembly 130, at this time, both ends of the elastic metal member 140 have a tendency of moving axially away from each other in the mounting hole 113, so that both ends of the elastic metal member 140 respectively abut against the upper shell 125 and the circuit board assembly 130, thereby reducing the possibility of poor contact between the upper shell 125 and the circuit board assembly 130. In this embodiment, one end of the elastic metal element 140 abuts against one side of the upper shell 125 facing the circuit board assembly 130, but in other embodiments, one end of the elastic metal element 140 may also be connected to a circumferential side surface of the upper shell 125.
Referring to fig. 1 to 3 again, in an embodiment, a first mounting cavity 111 and a second mounting cavity 112 are disposed in the housing 110 and are separated from each other, the stator assembly 120 is disposed in the first mounting cavity 111, the circuit board assembly 130 is disposed in the second mounting cavity 112, a mounting hole 113 communicating with the first mounting cavity 111 is formed in a wall of the second mounting cavity 112, and the elastic metal member 140 is mounted in the mounting hole 113. Specifically, the housing 110 forms a first mounting cavity 111 and a second mounting cavity 112 through an injection molding process, the stator assembly 120 is directly injected into the first mounting cavity 111 in an insert manner, the circuit board assembly 130 is mounted in the second mounting cavity 112, and the first mounting cavity 111 and the second mounting cavity 112 are separated by a cavity wall, so that the cavity wall of the second mounting cavity 112 is provided with a mounting hole 113 communicating with the first mounting cavity 111, and the cavity wall is located at the top of the upper housing part 125. The elastic metal member 140 is mounted in the mounting hole 113, and the diameter of the mounting hole 113 is slightly larger than that of the elastic metal member 140. Thereby limiting the axial deflection of the resilient metal member 140. The elastic metal part 140 can only do axial telescopic movement, and the possibility of axial deviation or inclination of the elastic metal part 140 is reduced, so that the stability of the electrical connection between the circuit board assembly 130 and the stator housing 121 is ensured.
In one embodiment, the stator housing 121 abuts against the periphery of the opening 116 at the side of the mounting hole 113 away from the circuit board assembly 130. In another embodiment, the stator housing 121 abuts against the periphery of the opening 116 on the side of the mounting hole 113 away from the circuit board assembly 130. That is, the stator housing 121 is closed at the opening 116 of the mounting hole 113, and is partially exposed to the mounting hole 113 to be brought into contact with the elastic metal member 140. And one end of the elastic metal member 140 close to the positioning piece is not exposed out of the mounting hole 113, so that the possibility of axial deviation or inclination of the elastic metal member 140 is further reduced, and the motion stability of the elastic metal member 140 is also ensured.
In order to ensure the stability of the circuit board assembly 130, in an embodiment, the cavity wall of the second mounting cavity 112 is provided with a mounting protrusion 114 protruding toward the circuit board assembly 130, the mounting hole 113 is provided in the mounting protrusion 114, and the protruding height of the mounting protrusion 114 is less than or equal to the distance from the circuit board assembly 130 to the cavity wall. Specifically, by providing the mounting protrusion 114 protruding toward the circuit board assembly 130 and providing the mounting hole 113 in the mounting protrusion 114, the depth of the mounting hole 113 is increased, and the axial displacement of the elastic metal member 140 is further restricted. Referring to fig. 1, the height of the mounting protrusion 114 is H1, the distance from the circuit board to the cavity wall is H2, and the height of the mounting protrusion 114 is less than or equal to the distance from the circuit board assembly 130 to the cavity wall. The installation of the mounting convex part 114 and the circuit board assembly 130 can be ensured not to interfere, and the possibility of axial deviation or inclination of the elastic metal member 140 can be reduced.
To further ensure the stability of the circuit board assembly 130, in an embodiment, referring to fig. 1 to 3, a supporting portion 115 is disposed in the second mounting cavity 112, and the supporting portion 115 is disposed around the periphery of the circuit board assembly 130 to fixedly support the circuit board assembly 130. Specifically, the supporting portion 115 is formed by extending the cavity wall of the second mounting cavity to the periphery of the circuit board, so as to improve the mounting stability of the circuit board assembly 130 on the one hand, and reduce the possibility of interference between the supporting portion 115 and other mounting structures, such as the pins 124, the resilient metal members 140, and the like, on the other hand. Of course, in other embodiments, the supporting portion 115 may be disposed in the middle of the circuit board.
To ensure the sealing performance of the housing 110 and reduce the possibility of dust entering the housing 110, in an embodiment, the electronic expansion valve 100 further includes a cover plate 150, and the cover plate 150 covers the opening 116 of the second mounting cavity 112. Because the first mounting cavity 111 and the stator assembly 120 are integrally injection molded and the opening 116 needs to be installed in cooperation with the valve body 160, the cover plate 150 is not needed. Therefore, only the opening 116 of the second mounting cavity 112 is covered by the cover plate 150, so that the sealing performance of the housing 110 is improved, and the possibility of dust entering the housing 110 is reduced.
Furthermore, the edge of the opening 116 is annularly provided with a supporting surface 117 and a supporting surrounding edge 118, the supporting surface 117 is disposed on the periphery of the supporting surrounding edge 118, the inner periphery of the cover plate 150 is provided with a sealing ring groove 151, the supporting surrounding edge 118 is inserted into the sealing ring groove 151, and the supporting surrounding edge 118 abuts against the bottom wall of the sealing ring groove 151. Specifically, the supporting surface 117 is used to provide a supporting function for the outer periphery of the cover plate 150, the supporting surrounding edge 118 is inserted into the sealing ring groove 151 on the inner periphery of the cover plate 150, and the supporting surrounding edge 118 abuts against the bottom wall of the sealing ring groove 151, so as to improve the sealing performance of the second mounting cavity 112, and the supporting surrounding edge 118 provides a barrier for moisture or dust entering from the gap between the housing 110 and the cover plate 150, and also increases the path for the moisture or dust to enter into the second mounting cavity 112. And to further improve the sealing performance of the second mounting cavity 112, the supporting peripheral edge 118 and the bottom wall of the sealing ring groove 151 are welded by ultrasonic waves or laser welding, thereby further blocking the path of moisture or dust entering the second mounting cavity 112. Of course, in other embodiments, a seal may be provided between the cover plate 150 and the edge of the opening 116 to reduce the possibility of moisture or dust entering the second mounting cavity 112.
In one embodiment, the resilient metal member 140 is a spring. Specifically, because of the simple structure of spring, and simple to operate, and this spring generally is compression spring, during the installation directly with this spring installation to mounting hole 113 in, then install circuit board subassembly 130 in casing 110 to guarantee that circuit board subassembly 130 is connected with stator module 120, can guarantee that elastic metal piece 140's both ends respectively butt in circuit board subassembly 130 and stator housing 121, and then the lid closes apron 150.
In another embodiment, the resilient metal member 140 is a spring. The spring plate has certain elastic potential energy.
The utility model discloses still provide an air conditioning system, this air conditioning system includes electronic expansion valve 100, and above-mentioned embodiment is referred to this electronic expansion valve 100's concrete structure, because this air conditioning system has adopted the whole technical scheme of all above-mentioned embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, gives unnecessary detail here one by one.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. An electronic expansion valve, comprising:
a housing;
a stator assembly mounted within the housing, including a stator housing;
the circuit board assembly is arranged in the shell and is electrically connected with the stator assembly; and (c) a second step of,
and the elastic metal piece is arranged between the circuit board assembly and the stator shell, and two ends of the elastic metal piece are respectively and electrically connected with the circuit board assembly and the stator shell, so that the circuit board assembly is in ground connection with the stator assembly.
2. The electronic expansion valve according to claim 1, wherein the stator housing comprises an upper housing part and a lower housing part which are spliced with each other, one end of the elastic metal member abuts against one side of the upper housing part facing the circuit board assembly, and the other end abuts against one side of the circuit board assembly facing the stator housing.
3. The electronic expansion valve according to claim 1, wherein a first mounting cavity and a second mounting cavity are provided in the housing, the first mounting cavity and the second mounting cavity are spaced apart from each other, the stator assembly is provided in the first mounting cavity, the circuit board assembly is provided in the second mounting cavity, a mounting hole communicating with the first mounting cavity is provided in a wall of the second mounting cavity, and the elastic metal member is mounted in the mounting hole.
4. The electronic expansion valve of claim 3, wherein the stator housing abuts an opening periphery of the mounting hole on a side away from the circuit board assembly.
5. The electronic expansion valve of claim 3, wherein the wall of the second mounting cavity is provided with a mounting protrusion protruding towards the circuit board assembly, the mounting hole is provided on the mounting protrusion, and the protruding height of the mounting protrusion is less than or equal to the distance from the circuit board assembly to the wall of the cavity.
6. The electronic expansion valve of claim 3, wherein a support portion is disposed in the second mounting chamber, and the support portion is disposed around a periphery of the circuit board assembly to fixedly support the circuit board assembly.
7. The electronic expansion valve of claim 3, further comprising a cover plate covering the opening of the second mounting chamber.
8. The electronic expansion valve according to claim 7, wherein the edge ring of the opening has a supporting surface and a supporting surrounding edge, the supporting surface is disposed on the periphery of the supporting surrounding edge, the inner periphery of the cover plate has a sealing ring groove, the supporting surrounding edge is inserted into the sealing ring groove, and the supporting surrounding edge abuts against the bottom wall of the sealing ring groove.
9. The electronic expansion valve according to any of claims 1-8, wherein the resilient metal member is a spring or a reed.
10. An air conditioning system comprising an electronic expansion valve according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222794997.5U CN218380008U (en) | 2022-10-21 | 2022-10-21 | Electronic expansion valve and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222794997.5U CN218380008U (en) | 2022-10-21 | 2022-10-21 | Electronic expansion valve and air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218380008U true CN218380008U (en) | 2023-01-24 |
Family
ID=84932918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222794997.5U Active CN218380008U (en) | 2022-10-21 | 2022-10-21 | Electronic expansion valve and air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218380008U (en) |
-
2022
- 2022-10-21 CN CN202222794997.5U patent/CN218380008U/en active Active
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