CN209762282U - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN209762282U CN209762282U CN201920622977.5U CN201920622977U CN209762282U CN 209762282 U CN209762282 U CN 209762282U CN 201920622977 U CN201920622977 U CN 201920622977U CN 209762282 U CN209762282 U CN 209762282U
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- China
- Prior art keywords
- valve
- needle
- cylinder portion
- electronic expansion
- expansion valve
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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 an electronic expansion valve, this electronic expansion valve include the needle subassembly, the needle subassembly includes needle, nut seat and needle bearing structure, needle bearing structure includes first cooperation section of thick bamboo portion, supporting part and second cooperation section of thick bamboo portion, the outer peripheral face of first cooperation section of thick bamboo portion can with the inner peripheral surface interference fit or the transition fit of socket portion, the cross-sectional area of the outer peripheral face of second cooperation section of thick bamboo portion is less than the cross-sectional area of the outer peripheral face of first cooperation section of thick bamboo portion, needle bearing structure with nut seat welded fastening. This needle bearing structure adopts the interference fit or the transition fit of first cooperation section of thick bamboo portion with the hole portion to replace turn-ups joint structure, can reduce needle bearing structure's the processing cost and the processing degree of difficulty.
Description
Technical Field
the utility model relates to a refrigeration control technical field especially relates to an electronic expansion valve.
Background
The electronic expansion valve comprises a valve needle, and at present, some electronic expansion valves are provided with a structure for supporting the valve needle, and the structure for supporting the valve needle is generally formed by stretching a metal plate, then flanging the metal plate, and clamping the metal plate on a valve seat through the flanging.
The electronic expansion valve can be provided, the structure of the electronic expansion valve, which is different from the supporting valve needle, is clamped on the valve seat through the flanging, and the structural processing of the supporting valve needle is simpler.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electronic expansion valve, the electronic expansion valve includes the needle subassembly, the needle subassembly includes needle, nut seat and needle bearing structure, the needle bearing structure includes first cooperation section of thick bamboo portion, supporting part and second cooperation section of thick bamboo portion, the nut seat includes the socket portion;
the first matching cylinder part is in interference fit with the connecting hole part and then is welded and fixed or is in transition fit and then is welded and fixed, and the cross sectional area of the second matching cylinder part is smaller than that of the first matching cylinder part;
The second fitting cylinder portion is clearance-fitted with the needle, and the support portion is located between the first fitting cylinder portion and the second fitting cylinder portion.
or, the utility model provides an electronic expansion valve, electronic expansion valve includes the needle subassembly, the needle subassembly includes needle, nut seat and needle bearing structure, the needle bearing structure includes first cooperation section of thick bamboo portion, guide cylinder portion, supporting part and second cooperation section of thick bamboo portion, the nut seat includes the hole portion;
The first matching cylinder part is in interference fit or transition fit with the hole part and then is welded and fixed, and the cross section area of the second matching cylinder part is smaller than that of the first matching cylinder part;
The second engagement cylinder portion is clearance-engaged with the needle, a cross-sectional area of the guide cylinder portion is smaller than a cross-sectional area of the first engagement cylinder portion, and the cross-sectional area of the guide cylinder portion is larger than the cross-sectional area of the second engagement cylinder portion;
The first fitting cylinder portion, the guide cylinder portion and the second fitting cylinder portion are arranged in sequence, and the support portion is located between the guide cylinder portion and the second fitting cylinder portion.
The utility model provides an electronic expansion valve's needle bearing structure's first cooperation section of thick bamboo portion adopts interference fit or clearance fit welded mode after with connecting hole portion, and this needle bearing structure processing is comparatively simple.
drawings
Fig. 1 is a schematic perspective view of a specific embodiment of a valve needle support structure of an electronic expansion valve according to the present invention;
FIG. 2 is a schematic cross-sectional view of the valve needle support structure of FIG. 1;
Fig. 3 is a schematic perspective view of an embodiment of an electronic expansion valve according to the present invention;
FIG. 4 is a schematic cross-sectional view of the valve body of FIG. 3;
Fig. 5 is an enlarged schematic view of the valve seat member of fig. 4.
the reference numerals in fig. 1 to 5 are explained as follows:
1 coil part, 2 valve body part;
a valve seat part 21, a rotor part 22, a speed reducing part 23, a transmission part 24 and a shell part 25;
211 a needle support structure, 2111 a first mating cylinder portion, 2112 a guide cylinder portion, 2113 a second mating cylinder portion, 2114 a transition cylinder portion, 2115 a support portion; 212 valve pin, 2121 circumferential flange, 2122 valve pin sealing surface; 213 a needle spring; 214 nut seats, 2141 nut connecting parts and 2142 hole connecting parts; 215 nut; 216 a valve seat body portion, 2161 a valve seat cavity, 2162 a first valve port, 2163 a first interface portion; 217 valve core portion, 2171 valve core portion sealing surface, 2172 second valve port, 2173 second interface portion; 218 a first pipe receiving portion; 219 second connecting pipe portion.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.
It should be noted that, the terms of orientation such as up, down, left, right, etc. are used in the drawings for convenience of description, and should not be construed as limiting the technical solutions.
The utility model provides a needle subassembly and the electronic expansion valve who adopts this needle subassembly, for the convenience of understanding, this paper expresses both in the lump.
Referring to fig. 1, fig. 3 to fig. 5, fig. 1 is a schematic perspective view of a valve needle support structure of an electronic expansion valve according to an embodiment of the present invention; fig. 3 is a schematic perspective view of an embodiment of an electronic expansion valve according to the present invention; FIG. 4 is a schematic cross-sectional view of the valve body 2 of FIG. 3; fig. 5 is an enlarged schematic view of the valve seat member of fig. 4.
As shown in fig. 1, the needle support structure 211 according to the present invention includes a first fitting cylinder portion 2111, a guide cylinder portion 2112, and a second fitting cylinder portion 2113. The first mating cylinder portion 2111, the guide cylinder portion 2112, and the second mating cylinder portion 2113 are coaxially arranged and arranged in order in the axial direction (fig. 1 shows the arrangement from top to bottom). Further, the first mating cylinder portion 2111, the guide cylinder portion 2112, and the second mating cylinder portion 2113 may be integrally molded, but it is needless to say that the first mating cylinder portion 2111, the guide cylinder portion 2112, and the second mating cylinder portion 2113 may be integrally molded, that is, the first mating cylinder portion 2111 and the guide cylinder portion 2112 may be fixedly connected, and the guide cylinder portion 2112 and the second mating cylinder portion 2113 may be directly or indirectly fixedly connected, or one of the first mating cylinder portion 2111 and the guide cylinder portion 2112, and the guide cylinder portion 2112 and the second mating cylinder portion 2113 may be integrally molded, and the other may be directly or indirectly fixedly connected.
As shown in fig. 3-5, the present invention provides an electronic expansion valve comprising a valve body 2, the valve body 2 comprises a valve seat member 21, the valve seat member 21 comprises a valve needle assembly and a nut 215, the valve needle assembly comprises a valve needle 212, a valve needle support structure 211 and a nut seat 214.
As shown in fig. 5, one end (upper end) of the nut holder 214 is a nut connecting portion 2141 capable of connecting the nut 215, and the other end (lower end) is a hole portion 2142 capable of press-fitting the needle support structure 211.
The first fitting cylinder portion 2111 of the valve needle support structure 211 can be in interference fit or transition fit with the inner circumferential surface of the connection hole portion 2142 through the outer circumferential surface thereof, and the guide cylinder portion 2112 can be in clearance fit with the inner circumferential surface of the connection hole portion 2142 through the outer circumferential surface thereof, and it should be noted that the outer circumferential surface of the guide cylinder portion 2112 can be in clearance fit with the inner circumferential surface of the connection hole portion 2142 in this specification, and it does not mean that the outer circumferential surface of the guide cylinder portion 2112 is in clearance fit with the inner circumferential surface of the connection hole portion 2142, and at this time, the cross-sectional area of the guide cylinder portion 2112.
In the embodiment, the inner circumferential surface of the connection hole portion 2142, the outer circumferential surface of the first fitting cylinder portion 2111, and the outer circumferential surface of the guide cylinder portion 2112 are all cylindrical surfaces. Also, the diameter of the outer peripheral surface of the guide cylinder portion 2112 is smaller than the diameter of the outer peripheral surface of the first fitting cylinder portion 2111, and at this time, the guide cylinder portion 2112 can be clearance fitted to the hole portion 2142, that is, the outer diameter of the guide cylinder portion 2112 is smaller than the inner diameter of the hole portion 2142, and when the inner diameter of the guide cylinder portion 2112 changes, the maximum outer diameter of the guide cylinder portion 2112 is smaller than the inner diameter of the hole portion 2142, and it should be noted that the guide cylinder portion 2112 can be clearance fitted to the hole portion 2142, and does not mean that the guide cylinder portion 2112 is clearance fitted to the hole portion 2142.
And the first mating bore portion 2111 is at least partially capable of interference or transition fit with the receptacle portion 2142.
it should be noted that the first fitting cylinder portion 2111 is not necessarily cylindrical, when the first fitting cylinder portion 2111 is cylindrical, the first fitting cylinder portion 2111 can be in interference fit or transition fit with the connection hole portion 2142, when the first fitting cylinder portion 2111 is in other shapes (for example, a circular truncated cone shape), at least a portion of the first fitting cylinder portion 2111 can be in interference fit or transition fit with the connection hole portion 2142, and in general, the first fitting cylinder portion 2111 can be in interference fit or over fit with the connection hole portion 2142, so as to facilitate the subsequent welding of the needle supporting structure 211 and the nut seat 214, and also provide a better condition for the coaxiality of the needle supporting structure 211 and the nut seat 214 after welding.
Also, the cross-sectional area of the outer peripheral surface of the second engagement cylinder portion 2113 of the needle support structure 211 is smaller than the cross-sectional area of the outer peripheral surface of the first engagement cylinder portion 2111, so that the second engagement cylinder portion 2113 can pass through the connection hole portion 2142 when assembled.
The needle support structure 211 may be assembled to the connection hole part 2142 as follows:
The valve needle support structure 211 is assembled from the nut connecting portion 2141 side to the receiving hole portion 2142 side, and the second fitting cylinder portion 2113 is first inserted into the receiving hole portion 2142 and is extended from the receiving hole portion 2142, then the guide cylinder portion 2112 is inserted into the receiving hole portion 2142, and finally the first fitting cylinder portion 2111 is inserted into the receiving hole portion 2142, and the outer circumferential surface of the first fitting cylinder portion 2111 is interference-fitted or transition-fitted with the inner circumferential surface of the receiving hole portion 2142, so that the valve needle support structure 211 is press-fitted to the nut seat 214, and after the valve needle support structure 211 is interference-fitted or transition-fitted with the nut seat 214, the two are fixedly connected by welding, so as to increase the connecting strength of the.
Referring to fig. 2, fig. 2 is a schematic cross-sectional view of the valve needle supporting structure 211 in fig. 1.
As shown in fig. 2, the cross-sectional area of the inner peripheral surface of the second fitting cylinder portion 2113 of the needle support structure 211 is smaller than the cross-sectional area of the inner peripheral surface of the guide cylinder portion 2112, and a support portion 2115 is formed between the second fitting cylinder portion 2113 and the guide cylinder portion 2112. The support portion 2115 may be a horizontal table perpendicular to the axial direction.
The inner circumferential surface of the second fitting cylinder portion 2113 is capable of clearance-fitting with the outer circumferential surface of the needle 212 to guide the axial movement of the needle 212 when the electronic expansion valve is operated.
Referring also to fig. 5, as shown in fig. 5, a circumferential flange 2121 is provided around the outer periphery of a first axial end (shown upper end) of valve needle 212, and a valve needle sealing surface 2122 is provided at a second axial end (shown lower end).
Valve pin 212 and valve pin support structure 211 may be assembled in the following manner:
The needle 212 is inserted into the needle support structure 211 with the second axial end of the needle 212 projecting from the second fitting cylinder portion 2113, and the needle 212 is peripherally fitted with a needle spring 213, the needle spring 213 being located between the circumferential flange 2121 and the support portion 2115.
Further, as shown in fig. 2, since the cross-sectional area of the outer peripheral surface of the guide cylinder portion 2112 is smaller than the cross-sectional area of the first mating cylinder portion 2111, the needle support structure 211 is further formed with a transition cylinder portion 2114, the transition cylinder portion 2114 being located between the first mating cylinder portion 2111 and the guide cylinder portion 2112; the end surface area and the end surface shape of one end (upper end in the figure) of the transition cylinder portion 2114 are respectively identical to the end surface area and the end surface shape of one end (lower end in the figure) of the first fitting cylinder portion 2111; the end surface area and the end surface shape of the other end (lower end in the figure) of the transition cylinder portion 2114 match the end surface area and the end surface shape of one end (upper end in the figure) of the guide cylinder portion 2112, respectively, but of course, when the first engagement cylinder portion 2111 and the guide cylinder portion 2112 are directly transited, the transition cylinder portion 2114 may be omitted.
note that when the transition cylinder portion 2114 is integrally formed with the first mating cylinder portion 2111 and the guide cylinder portion 2112, respectively, the first transition cylinder portion 2111 and the guide cylinder portion 2112 are also integrally formed, and the support portion 2115 is also formed in the guide cylinder portion 2112 and the second transition cylinder portion 2113.
Specifically, the outer peripheral surface of the transition cylinder portion 2114 may be a smooth transition surface, and for example, the outer peripheral surface of the transition cylinder portion 2114 may be a conical surface if the outer diameter of the first mating cylinder portion 2111 is larger than the outer diameter of the guide cylinder portion 2112.
By providing the transition cylinder portion 2114, the valve needle support structure 211 can have better assembling performance, and the coaxiality of the valve needle support structure 211 and the nut seat 214 after the assembly is completed can be ensured.
With continued reference to fig. 3-5.
As shown in fig. 5, the valve seat member 21 further includes a valve seat body portion 216, a spool portion 217, a first pipe portion 218, a second pipe portion 219, and a valve seat cavity 2161.
The valve seat body 216 is provided with a first valve port 2162 and a first interface portion 2163, the first valve port 2162 and the first interface portion 2163 can be coaxially disposed, and the axis is perpendicular to the axis of the valve seat cavity 2161. The first junction pipe portion 218 is fixedly connected to the first port portion 2163, and an inner space of the first junction pipe portion 218 can communicate with the valve seat cavity 2161 through the first valve port 2162.
further, one end (upper end shown) of the valve seat main body portion 216 may be fixedly connected to the nut seat 214, but the valve seat main body portion 216 and the nut seat 214 may be integrally formed, and the through hole of the nut seat 214 and the through hole of the valve seat main body portion 216 may communicate with each other in a state of being fixedly connected or integrally formed. The valve body 217 is fixedly connected to the other end (lower end shown) of the valve seat body 216, and of course, the body 216 and the valve body 217 may be integrally molded, the valve body 217 has a second valve port 2172 and a second interface portion 2173, the second connecting pipe portion 219 is fixedly connected to the second interface portion 2173, and the inner space of the second connecting pipe portion 219 communicates with the valve seat cavity 2161 through the second valve port 2172.
Further, one end (upper end shown) of the second valve port 2172 includes a valve core sealing surface 2171 for mating with a valve needle sealing surface 2122 of the valve needle 212, and as shown in fig. 5, when the valve needle 212 moves downward to a limit position, the valve needle sealing surface 2122 abuts against the valve core sealing surface 2171, closing the electronic expansion valve, and from the limit position, moving upward the valve needle 212, the valve needle sealing surface 2122 moves away from the valve core sealing surface 2171, opening the electronic expansion valve.
after the above-mentioned components are assembled, the valve body 217 and the valve seat body 216, the nut seat 214 and the valve seat body 216, the first pipe connecting portion 218 and the valve body, and the second pipe connecting portion 219 and the valve seat body 216 may be integrally furnace-welded to ensure the sealing performance of the electronic expansion valve.
As shown in fig. 4, the valve body 2 includes a rotor member 22, a deceleration member 23, a transmission member 24, and a housing member 25 in addition to the valve seat member 21.
Wherein the rotor part 22, the reduction part 23 and the transmission part 24 are located in the housing part 25. One end (lower end shown) of the housing member 25 is connected to one end (upper end shown) of the valve seat main body 216. The speed reduction member 23 is connected to the rotor member 22, and the transmission member 24 is connected to the speed reduction member 23 and the needle 212 of the valve seat member 21.
As shown in fig. 3, the electronic expansion valve provided by the present invention includes a coil portion 1 in addition to a valve body portion 2.
The coil portion 1 is disposed on the outer periphery of the housing 25 and is located corresponding to the rotor portion 22 in the housing 25 to interact with the rotor portion 22.
The working process of the electronic expansion valve is as follows:
After the coil component is electrified, electromagnetic force is generated to interact with the rotor component 22, so as to drive the rotor component 22 to rotate, the rotation of the rotor component 22 is reduced by the speed reduction component 23, then is converted into linear motion by the transmission component 24, and is transmitted to the valve needle 212, so that the valve needle 212 moves along the axial direction (in the vertical direction in the figure), and therefore, the electronic expansion valve is opened and closed, and the opening degree of the electronic expansion valve is controlled.
In addition, the present invention provides a second embodiment, and for convenience of describing the present embodiment, the following description will be made in detail with respect to the differences from the first embodiment.
in the present embodiment, the needle support structure 211 does not include the guide cylinder portion 2112, and therefore the needle support structure 211 does not include the transition cylinder portion 2114, and in the present embodiment, the first guide cylinder portion may be a standard cylindrical shape or another shape (for example, a truncated cone shape), and the needle support structure 211 does not have the transition cylinder portion 2114 which causes the transition cylinder portion 2114 to be suddenly contracted in the circumferential direction between the support portion 2115 and the first fitting cylinder portion 2111, and at this time, the support portion 2115 is positioned between the first fitting cylinder portion 2111 and the second fitting cylinder portion 2113.
the electronic expansion valve provided by the present invention is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. an electronic expansion valve, characterized in that the electronic expansion valve comprises a needle assembly comprising a needle (212), a nut seat (214), and a needle support structure (211), the needle support structure (211) comprising a first mating cylinder portion (2111), a support portion (2115), and a second mating cylinder portion (2113), the nut seat (214) comprising an interface portion (2142);
The first matching cylinder part (2111) and the hole receiving part (2142) are in interference fit and then are welded and fixed or are in transition fit and then are welded and fixed, and the cross sectional area of the second matching cylinder part (2113) is smaller than that of the first matching cylinder part (2111);
the second mating cylinder portion (2113) is loosely fitted to the needle (212), and the support portion (2115) is located between the first mating cylinder portion (2111) and the second mating cylinder portion (2113).
2. An electronic expansion valve, characterized in that the electronic expansion valve comprises a needle assembly comprising a needle (212), a nut seat (214), and a needle support structure (211), the needle support structure (211) comprising a first fitting cylinder portion (2111), a guide cylinder portion (2112), a support portion (2115), and a second fitting cylinder portion (2113), the nut seat (214) comprising an interface portion (2142);
The first matching cylinder part (2111) and the hole receiving part (2142) are in interference fit or transition fit and then are welded and fixed, and the cross sectional area of the second matching cylinder part (2113) is smaller than that of the first matching cylinder part (2111);
The second mating cylinder portion (2113) is clearance-fitted to the needle (212), the guide cylinder portion (2112) has a cross-sectional area smaller than that of the first mating cylinder portion (2111), and the guide cylinder portion (2112) has a cross-sectional area larger than that of the second mating cylinder portion (2113);
the first engagement tube portion (2111), the guide tube portion (2112), and the second engagement tube portion (2113) are arranged in this order, and the support portion (2115) is located between the guide tube portion (2112) and the second engagement tube portion (2113).
3. The electronic expansion valve according to claim 2, wherein the needle support structure (211) further comprises a transition cylinder portion (2114), and an end surface area and an end surface shape of one end of the transition cylinder portion (2114) are respectively in agreement with an end surface area and an end surface shape of one end of the first fitting cylinder portion (2111); the area and the shape of the end face of the other end of the transition cylinder part (2114) are respectively consistent with the area and the shape of the end face of one end of the guide cylinder part (2112).
4. An electronic expansion valve according to any of claims 1-3, wherein the outer circumferential surface of the first fitting cylinder portion (2111) is a cylindrical surface or a circular truncated surface.
5. An electronic expansion valve according to any of claims 1-3, wherein the electronic expansion valve comprises a valve body portion (2), the valve body portion (2) comprising a valve seat member (21), the valve seat member (21) comprising the valve needle assembly; the nut seat further comprises a nut connecting portion (2141), and the nut connecting portion (2141) is fixedly connected with the nut.
6. An electronic expansion valve according to claim 5, wherein a first axial end of the valve needle (212) comprises a circumferential flange (2121) and a second axial end comprises a valve needle sealing surface (2122); the needle (212) is inserted into the needle support structure (211), and the second axial end extends from the second fitting cylinder portion (2113); the valve seat part (21) further comprises a needle spring (213), the needle spring (213) being located between the circumferential flange (2121) and the support portion (2115).
7. the electronic expansion valve of claim 6, wherein the valve seat member (21) further comprises a valve seat body portion (216), a spool portion (217), and a valve seat cavity (2161); the nut seat (214) is fixedly connected with or integrally formed with the valve seat body part (216), and the valve needle support structure (211) is positioned in the valve seat cavity (2161); the valve core part (217) is fixedly connected with the valve seat body part (216) or integrally formed.
8. An electronic expansion valve according to claim 7, wherein the valve seat member (21) further comprises a first nipple portion (218) and a second nipple portion (219), the valve seat body portion (216) being provided with a first valve port (2162) and a first interface portion (2163), the first nipple portion (218) being fixedly connected with the first interface portion (2163); the valve core part (217) is provided with a second valve port (2172) and a second interface part (2173), and the second pipe connecting part (219) is fixedly connected with the second interface part (2173); one end of the second valve port (2172) comprises a valve core sealing surface (2171) matched with the valve needle sealing surface (2122).
9. An electronic expansion valve according to claim 8, wherein the valve needle support structure (211) is connected to the nut seat (214) by furnace welding or laser; the valve core portion (217) and the valve seat body portion (216), the nut seat (214) and the valve seat body portion (216), the first pipe connecting portion (218) and the valve seat body portion (216), and the second pipe connecting portion (219) and the valve core portion (217) are welded and fixed.
10. An electronic expansion valve according to claim 7, wherein the valve body portion (2) further comprises a rotor member (22), a deceleration member (23) connected to the rotor member (22), a transmission member (24) connecting the deceleration member (23) with the valve needle (212), and a housing member (25) housing the rotor member (22), the deceleration member (23), the transmission member (24); the housing member (25) is connected to the valve seat body portion (216).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920622977.5U CN209762282U (en) | 2019-04-30 | 2019-04-30 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920622977.5U CN209762282U (en) | 2019-04-30 | 2019-04-30 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209762282U true CN209762282U (en) | 2019-12-10 |
Family
ID=68761106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920622977.5U Active CN209762282U (en) | 2019-04-30 | 2019-04-30 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209762282U (en) |
-
2019
- 2019-04-30 CN CN201920622977.5U patent/CN209762282U/en active Active
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