CN217502603U - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
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- CN217502603U CN217502603U CN202221509735.3U CN202221509735U CN217502603U CN 217502603 U CN217502603 U CN 217502603U CN 202221509735 U CN202221509735 U CN 202221509735U CN 217502603 U CN217502603 U CN 217502603U
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Abstract
The utility model discloses an electronic expansion valve, which comprises a valve seat, a guide sleeve, a connecting pipe and a welding ring, wherein the valve seat is provided with a valve cavity and a side hole which is communicated with the valve cavity; the guide sleeve is arranged in the valve cavity and comprises a matching section, and a first gap is formed between the matching section and the inner wall of the valve cavity; the connecting pipe comprises an extending section and an inserting section, and the extending section extends into the valve cavity and is abutted against the guide sleeve; the insertion section penetrates through the side hole and forms a second gap with the inner wall of the side hole; the welding ring is arranged in the valve cavity, the welding ring is sleeved with the guide sleeve or the connecting pipe, and when the welding ring is melted, the welding ring flows to the first gap and the second gap. The utility model provides an electronic expansion valve can reduce the uide bushing among the prior art and the welding process of the laser welding's of disk seat electronic expansion valve to only need one installation to weld the welding that the ring just solved 3 parts, not only simplified welding process, still the cost is reduced.
Description
Technical Field
The utility model relates to a fluid control part technical field, in particular to electronic expansion valve.
Background
The electronic expansion valve is used for connecting a system pipeline and refrigeration equipment. The electronic expansion valve is provided with a valve core seat, a valve port is arranged on the valve core seat, and a connecting pipe for connecting a system pipeline is arranged outside the valve core seat. The valve core seat and the valve body of the electronic expansion valve are welded in a press-fitting and laser welding mode. Due to the limitation of the welding process, when the valve core seat and the valve body of the conventional electronic expansion valve are welded with each other, all parts need to be welded respectively, so that the process is complex, the operation steps are multiple, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing an electronic expansion valve aims at reducing electronic expansion valve welding processes.
The utility model discloses technical scheme is through providing an electronic expansion valve, electronic expansion valve includes:
the valve seat is provided with a valve cavity and a side hole, and the side hole is communicated with the valve cavity;
the guide sleeve is arranged in the valve cavity and comprises a matching section, and a first gap is formed between the matching section and the inner wall of the valve cavity;
the connecting pipe comprises an extending section and an inserting section, and the extending section extends into the valve cavity; the insertion section penetrates through the side hole and forms a second gap with the inner wall of the side hole;
and the welding ring is arranged in the valve cavity, the welding ring is sleeved with the guide sleeve or the connecting pipe, and the welding ring flows to the first gap and the second gap when being melted.
In an embodiment, the guide sleeve further comprises a step surface, the step surface is arranged on the bottom wall of the matching section and connected with the outer wall of the matching section, and the welding ring abuts against the step surface.
In one embodiment, the guide sleeve further comprises a positioning section in the axial direction, the matching section is arranged between the positioning section and the step surface, and the positioning section is connected with the matching section and abutted against the inner wall of the valve cavity.
In an embodiment, the guide sleeve has an outer diameter at the locating section which is larger than an outer diameter at the mating section.
In one embodiment, the guide sleeve further comprises a guide section, the step surface is arranged between the guide section and the positioning section, the guide section is connected with the step surface, and the end surface of the extending section, facing one end of the valve cavity, is abutted to the guide section.
In an embodiment, an accommodating cavity is defined by the inner wall of the valve cavity, the step surface and the outer wall of the guide section, the accommodating cavity is communicated with the first gap and the second gap, and the welding ring is accommodated in the accommodating cavity.
In an embodiment, the welding ring is sleeved on the outer wall of the extending section, and the welding ring is respectively abutted against the inner wall of the valve cavity, the step surface and the outer wall of the guide section.
In one embodiment, the welding ring is annular or in the shape of a broken ring.
In one embodiment, the first gap has a pitch of less than 0.2 mm.
In one embodiment, the second gap has a pitch of less than 0.2 mm.
The technical scheme of the utility model through providing an electronic expansion valve, electronic expansion valve includes disk seat, uide bushing, takeover and welds the ring, and the disk seat is provided with valve pocket and side opening, and the uide bushing setting is in the valve pocket, and the takeover stretches into the valve pocket through the side opening. The uide bushing includes cooperation section and location section, location section and disk seat butt, and the cooperation section sets up in location section below, has first clearance between cooperation section and the disk seat. The adapter tube includes an insertion section having a second clearance with the valve seat at the side hole. The welding ring is arranged in the valve cavity, the welding ring is sleeved with the guide sleeve or the connecting pipe, and when the welding ring is melted, the welding ring flows to the first gap and the second gap.
The technical scheme of the utility model provide an electronic expansion valve, the uide bushing has crossed the tunnel furnace welding with disk seat, takeover together, welds the ring setting between disk seat, uide bushing and takeover, simple to operate. During the welding, weld the ring and melt, fill up between disk seat and the takeover through the capillary action solder, and between uide bushing and the disk seat for uide bushing, disk seat, takeover weld the jail, the utility model provides a reducible electronic expansion valve process of electronic expansion valve (reduce the laser welding of uide bushing among the prior art and disk seat) to the welding of 3 parts is solved to a welding ring, and is with low costs.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art 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 schematic structural diagram of an embodiment of an electronic expansion valve;
FIG. 2 is a schematic view of another embodiment of an electronic expansion valve;
FIG. 3 is a schematic structural view of the guide sleeve;
fig. 4 is an enlarged schematic view of a point a in fig. 1.
The reference numbers indicate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 01 | |
11 | |
| 10 | |
12 | |
| 20 | |
21 | |
| 30 | Connecting pipe | 22 | |
| 40 | |
23 | |
| 31 | An extending |
24 | |
| 32 | |
51 | |
| 52 | Second gap |
The objects, features and advantages of the present invention will be further described with reference to the accompanying 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 in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment 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 drawings), and if the specific posture is changed, the directional indications are changed accordingly.
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 of the feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. 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 is an important part in refrigerating system, mainly plays the effect of throttle step-down and regulation flow. The existing electronic expansion valve comprises a valve seat assembly, a shell, a rotor assembly, a nut assembly and a valve needle assembly, wherein the nut assembly is provided with a nut, the nut is provided with a thread, the valve needle assembly is provided with a lead screw, the lead screw is provided with a thread, the nut is in threaded connection with the thread, the rotor assembly is fixedly connected with the lead screw, the valve seat assembly is provided with a valve port, the valve needle assembly is provided with a valve needle, and the magnetic rotor drives the valve needle to be close to or far away from the valve port so as to realize flow regulation. The technical scheme of the utility model the electronic expansion valve that provides, the uide bushing crosses the tunnel furnace welding with disk seat, takeover together, welds the ring cover and establishes the takeover inner wall inside the valve pocket, perhaps welds the ring cover and establishes the uide bushing outer wall. During the welding, weld the ring and melt, fill up between disk seat and the takeover through the capillary action solder, and between uide bushing and the disk seat for uide bushing, disk seat, takeover weld the jail, the utility model provides a reducible electronic expansion valve process of electronic expansion valve (reduce the laser welding of uide bushing among the prior art and disk seat) to the welding of 3 parts is solved to a welding ring, and is with low costs.
The utility model provides an electronic expansion valve crosses the product after the tunnel furnace welding, can use air conditioning system in, and the fluid medium of the electronic expansion valve of flowing through is the refrigerant that is used for carrying out the cold and heat exchange among the air conditioning system. At this time, the electronic expansion valve is installed at the inlet of the evaporator of the air conditioning system, and the electronic expansion valve is used as a boundary element between the high-pressure side and the low-pressure side of the air conditioning system, so that the high-pressure liquid refrigerant from the liquid storage drier and other devices is throttled and depressurized, the dosage of the liquid refrigerant entering the evaporator is adjusted and controlled, and the dosage of the liquid refrigerant can meet the requirement of the external refrigeration load. Alternatively, the electronic expansion valve is applied to other types of refrigeration equipment, the fluid medium flowing through the electronic expansion valve may also be other fluid media except for the refrigerant, as long as the electronic expansion valve can throttle and depressurize the fluid medium, which is not particularly limited.
The welding flux mentioned in the utility model refers to a fluid welding material after the welding ring is melted when the guide sleeve, the valve seat and the connecting pipe are welded together in the tunnel furnace. The solder is in a fluid state and can flow among the valve seat, the connecting pipe and the guide sleeve to fill the space between the valve seat and the connecting pipe and the space between the guide sleeve and the valve seat, so that the guide sleeve, the valve seat and the connecting pipe are firmly welded.
Referring to fig. 1 to 4, the present invention provides an electronic expansion valve 01, wherein the electronic expansion valve 01 includes a valve seat 10, a guide sleeve 20, a connecting pipe 30 and a welding ring 40, the valve seat 10 is provided with a valve cavity 11 and a side hole 12, and the side hole 12 is communicated with the valve cavity 11; the guide sleeve 20 is arranged in the valve cavity 11, the guide sleeve 20 comprises a matching section 22, and a first gap 51 is formed between the matching section 22 and the inner wall of the valve cavity 11; the adapter tube 30 comprises an extending section 31 and an inserting section 32, wherein the extending section 31 extends into the valve cavity 11; the insertion section 32 passes through the side hole 12 and forms a second gap 52 with the inner wall of the side hole 12; the welding ring 40 is disposed in the valve chamber 11, and the welding ring 40 is sleeved on the guide sleeve 20 or the adapter 30, and flows to the first gap 51 and the second gap 52 when the welding ring 40 is melted.
Specifically, the valve seat 10 is manufactured by machining a stainless steel material, and the valve seat 10 is substantially cylindrically disposed. It is understood that in other embodiments, the valve seat 10 may be made of other materials, and that the valve seat 10 may have other shapes than a cylinder. A valve cavity 11 is arranged in the valve seat 10, a side hole 12 is arranged on the side wall of the valve seat 10, and the side hole 12 is communicated with the valve cavity 11. A guide sleeve 20 is fixedly mounted in the valve chamber 11, the guide sleeve 20 guiding the movement of the needle assembly. The guide sleeve 20 comprises a matching section 22, the outer wall of the guide sleeve 20 is in clearance fit with the inner wall of the valve cavity 11 at the matching section 22, and a first clearance 51 is formed between the matching section 22 and the inner wall of the valve cavity 11. The first gap 51 extends circumferentially along the inner wall of the valve chamber 11 and is cylindrical. The length of the first gap 51 in the axial direction is the same as the length of the fitting section 22 in the axial direction. The adapter tube 30 comprises an insertion section 32 and an extension section 31, the outer diameter of the insertion section 32 and the outer diameter of the extension section 31 are both smaller than the inner diameter of the side hole 12, and the adapter tube 30 passes through the side hole 12 and extends into the valve cavity 11. The part of the adapter tube 30 penetrating into the side hole 12 is an insertion section 32, and the part of the adapter tube 30 extending into the valve cavity 11 is an extension section 31. The outer diameter of the insertion section 32 is smaller than the inner diameter of the side hole 12, the insertion section 32 is in clearance fit with the inner wall of the side hole 12, and a second clearance 52 is formed between the insertion section 32 and the inner wall of the side hole 12. The second gap 52 extends along the inner wall of the side hole 12 in the circumferential direction and has a cylindrical shape. The length of the second gap 52 in the axial direction is the same as the length of the insertion section 32 in the axial direction or the thickness of the side hole 12. The extending section 31 extends into the valve cavity 11 and abuts against the guide sleeve 20, so that the solder ring 40 is prevented from flowing between the extending section 31 and the outer wall of the guide sleeve 20 after being melted, and the solder cannot fill the first gap 51 and the second gap 52.
Referring to fig. 1, in an embodiment, the welding ring 40 is disposed in the valve cavity 11, the welding ring 40 is sleeved on the outer wall of the guide sleeve 20, and the welding ring 40 abuts against the inner wall of the valve cavity 11 and the extending section 31 of the connection pipe 30. When the valve seat 10, the guide sleeve 20 and the connecting pipe 30 are welded together in the tunnel furnace, the welding ring 40 sleeved on the outer wall of the guide sleeve 20 starts to melt, and the welding flux of the welding ring 40 is in a fluid state and can flow after the welding ring 40 is melted. Due to capillary action, the solder flows to the first gap 51 and the second gap 52, and both the first gap 51 and the second gap 52 are filled with the solder, so that the valve seat 10, the guide sleeve 20, and the adapter 30 are welded together.
Referring to fig. 2, in another embodiment, the welding ring 40 is disposed in the valve cavity 11, the welding ring 40 is sleeved on the outer wall of the connection pipe 30, and the welding ring 40 abuts against the inner wall of the valve cavity 11 and the guide sleeve 20. When the valve seat 10, the guide sleeve 20 and the connecting pipe 30 are welded together in the tunnel furnace, the welding ring 40 sleeved on the outer wall of the connecting pipe 30 starts to melt, and the welding flux of the welding ring 40 is in a fluid state and can flow after the welding ring 40 is melted. Due to the capillary action, the solder flows toward the first gap 51 and the second gap 52, and both the first gap 51 and the second gap 52 are filled with the solder, so that the valve seat 10, the guide sleeve 20, and the adapter 30 are welded together.
The technical scheme of the utility model through providing an electronic expansion valve 01, electronic expansion valve 01 includes disk seat 10, uide bushing 20, takes over 30 and welds ring 40, between disk seat 10 and the uide bushing 20, be formed with the clearance between disk seat 10 and the takeover 30 respectively, weld ring 40 and set up inside valve pocket 11, weld ring 40 and cup joint at takeover 30 outer walls, perhaps cup joint at uide bushing 20 outer walls. The welding ring 40 is sleeved on the connecting pipe 30 outside the valve seat 10, and the welding ring 40 is abutted against the connecting pipe 30 and the valve seat 10, so that the installation is convenient. The guide sleeve 20, the valve seat 10 and the connecting pipe 30 are welded together through a tunnel furnace, during welding, the welding ring 40 is melted, and solder is filled between the valve seat 10 and the connecting pipe 30 and between the guide sleeve 20 and the valve seat 10 through capillary action, so that the guide sleeve 20, the valve seat 10 and the connecting pipe 30 are firmly welded. The utility model provides an electronic expansion valve 01 can reduce the electronic expansion valve 01's of uide bushing 20 among the prior art and disk seat 10 laser welding process to only need one installation to weld the welding that ring 40 just solved 3 parts, not only simplified welding process, still the cost is reduced.
In an embodiment, the guide sleeve 20 further includes a step surface 23, the step surface 23 is disposed on the bottom wall of the matching section 22, the step surface 23 is connected to the outer wall of the matching section 22, and the welding ring 40 abuts against the step surface 23. Referring to fig. 3 and 4, a step surface 23 is formed on the bottom wall of the matching section 22, a space is formed between the step surface 23 and the extending section 31, the welding ring 40 penetrates through the space between the step surface 23 and the extending section 31, one side of the outer wall of the welding ring 40 is abutted against the outer wall of the extending section 31, and the other side of the outer wall of the welding ring 40 is abutted against the step surface 23. The welding ring 40 is fixed between the step surface 23 and the protruding section 31, and the welding ring 40 is limited in the axial direction of the guide sleeve 20 and cannot move. When the valve seat 10, the guide sleeve 20 and the connecting pipe 30 are welded together in the tunnel furnace, the welding ring 40 sleeved on the outer wall of the guide sleeve 20 starts to melt, and the welding flux of the welding ring 40 is in a fluid state and can flow after the welding ring 40 is melted. Due to capillary action, the solder flows to the first gap 51 and the second gap 52, and both the first gap 51 and the second gap 52 are filled with the solder, so that the valve seat 10, the guide sleeve 20, and the adapter 30 are welded together.
In an embodiment, the guiding sleeve 20 further includes a positioning section 21 in the axial direction, the matching section 22 is disposed between the positioning section 21 and the step surface 23, and the positioning section 21 is connected to the matching section 22 and abuts against the inner wall of the valve cavity 11. Referring to fig. 3 and 4, the guide sleeve 20 sequentially includes a positioning section 21, a matching section 22 and a step surface 23, the step surface 23 is close to the connection pipe 30, and the positioning section 21 is far away from the connection pipe 30. The positioning section 21 is connected with the matching section 22 and abuts against the inner wall of the valve cavity 11, and the positioning section 21 is used for determining the connecting position of the guide sleeve 20 and the valve seat 10. After the position where the positioning section 21 abuts against the inner wall of the valve chamber 11 is fixed, the position of the first gap 51 may be fixed. It will be appreciated that the position of the first gap 51 is determined by the positioning segment 21. In addition, the positioning section 21 is abutted against the inner wall of the valve cavity 11, the position of the guide sleeve 20 in the valve cavity 11 is relatively fixed, the guide sleeve 20 cannot shake or displace in the valve cavity 11, and the structural stability of the electronic expansion valve 01 is improved.
In one embodiment, the guide sleeve 20 has an outer diameter at the positioning section 21 that is larger than an outer diameter at the mating section 22. Referring to fig. 3, the positioning section 21 abuts against the inner wall of the valve cavity 11, and the fitting section 22 is in clearance fit with the inner wall of the valve cavity 11. Therefore, when the outer diameter of the guide sleeve 20 at the positioning section 21 is smaller than or equal to the outer diameter at the matching section 22, the inner wall of the valve cavity 11 has concave-convex fluctuation, which makes the processing difficult and is inconvenient for production and manufacture. The outer diameter of the guide sleeve 20 at the positioning section 21 is larger than that at the fitting section 22, and the portion of the outer diameter of the guide sleeve 20 at the positioning section 21 is larger than that at the fitting section 22 by the distance of the first gap 51. The inner wall of the valve cavity 11 is flat, and the processing and the manufacturing are convenient.
In an embodiment, the guiding sleeve 20 further comprises a guiding section 24, the step surface 23 is disposed between the guiding section 24 and the positioning section 21, the guiding section 24 is connected to the step surface 23, and an end surface of the extending section 31 facing one end of the valve cavity 11 abuts against the guiding section 24. Referring to fig. 3 and 4, the guiding sleeve 20 further includes a guiding section 24, and the guiding section 24 guides the movement of the valve needle assembly. The guide sleeve 20 sequentially comprises a positioning section 21, a matching section 22, a step surface 23 and a guide section 24, wherein the guide section 24 is close to the connecting pipe 30, and the positioning section 21 is far away from the connecting pipe 30. The guide section 24 is connected with the step surface 23, and the guide section 24 abuts against the end surface of the extending section 31 facing one end of the valve cavity 11. The end surface of the insertion section 31 facing the valve chamber 11 may be entirely abutted against the guide section 24 or partially abutted against the guide section 24. The guide section 24 abuts against the extending section 31, so that on one hand, the parts are not easy to loosen and shake, and the connection between the guide sleeve 20 and the connecting pipe 30 is more compact and stable. On the other hand, after the welding is melted, because the guide section 24 is abutted against the end face of the extending section 31, the loss of the solder from the end face of the extending section 31 is avoided, and enough solder can flow to the first gap 51 and the second gap 52, so that the first gap 51 and the second gap 52 are filled with the solder, and the guide sleeve 20 and the valve seat 10, and the valve seat 10 and the connecting pipe 30 can be welded firmly.
In one embodiment, the inner wall of the valve cavity 11, the step surface 23 and the outer wall of the guide section 24 are surrounded to form a containing cavity, the containing cavity is communicated with the first gap 51 and the second gap 52, and the welding ring 40 is contained in the containing cavity. Referring to fig. 1 and 4, the accommodating chamber includes three chamber walls, which are respectively an inner wall of the valve chamber 11, a step surface 23 and an outer wall of the guide section 24, and the accommodating chamber is respectively communicated with the first gap 51 and the second gap 52. The welding rings 40 are accommodated in the accommodating cavity, and the side walls of the welding rings 40 are respectively abutted against the inner wall of the valve cavity 11, the step surface 23 and the outer wall of the guide section 24, and the outer wall of the extending section 31 of the connecting pipe 30. When the valve seat 10, the guide sleeve 20 and the adapter 30 are welded together in the tunnel furnace, the welding ring 40 accommodated in the accommodating cavity starts to melt, and the welding flux of the welding ring 40 is fluid and can flow after the welding ring is melted. Due to capillary action, the solder flows to the first gap 51 and the second gap 52, and both the first gap 51 and the second gap 52 are filled with the solder, so that the valve seat 10, the guide sleeve 20, and the adapter 30 are welded together. The first gap 51 and the second gap 52 have a very small pitch, and after the solder fills the first gap 51 and the second gap 52, the remaining solder fills the receiving cavity. The valve seat 10, the guide sleeve 20 and the adapter 30 are further tightly welded together. The welding process of the electronic expansion valve 01 of the laser welding of the guide sleeve 20 and the valve seat 10 in the prior art can be reduced, and the welding of 3 parts can be realized only by installing one welding ring 40, so that the welding process is simplified, and the cost is reduced.
In another embodiment, the welding ring 40 is sleeved on the outer wall of the extending section 31, and the welding ring 40 abuts against the inner wall of the valve cavity 11, the step surface 23 and the outer wall of the guiding section 24 respectively. Referring to fig. 2 and 4, the welding ring 40 is disposed in the valve chamber 11, the extending section 31 of the connection pipe 30 extends into the valve chamber 11, and the welding ring 40 is sleeved on the outer wall of the extending section 31. The inner wall of the valve cavity 11, the outer wall of the guide sleeve 20 and the outer wall of the stretching section 31 are surrounded to form a through opening, part of the welding ring 40 penetrates through the through opening, and the welding ring 40 is sleeved on the outer wall of the stretching section 31. The welding rings 40 at the through openings respectively abut against the inner wall of the valve cavity 11, the step surface 23 and the outer wall of the guide section 24. When the valve seat 10, the guide sleeve 20 and the connecting pipe 30 are welded together in the tunnel furnace, the welding ring 40 sleeved on the outer wall of the extending section 31 starts to melt, and the welding flux of the welding ring 40 is fluid and can flow after the welding ring 40 is melted. Due to capillary action, the solder flows to the first gap 51 and the second gap 52, and both the first gap 51 and the second gap 52 are filled with the solder, so that the valve seat 10, the guide sleeve 20, and the adapter 30 are welded together. The welding process of the electronic expansion valve 01 of the laser welding of the guide sleeve 20 and the valve seat 10 in the prior art can be reduced, and the welding of 3 parts can be realized only by installing one welding ring 40, so that the welding process is simplified, and the cost is reduced.
In one embodiment, the weld ring 40 is annular or has a broken annular shape. Solder is a generic term for metal alloy materials used to add to welds, weld overlays and braze joints. Including welding wire, welding rods, brazing filler metal, etc. The welding ring 40 mentioned in the present invention is the solder used for welding the valve seat 10, the guiding sleeve 20 and the connecting pipe 30 in the valve cavity 11 before the valve seat 10, the guiding sleeve 20 and the connecting pipe 30 are welded together in the tunnel furnace. Before the valve seat 10, the guide sleeve 20 and the connecting pipe 30 are welded together in the tunnel furnace, the welding ring 40 is in a ring shape, or in a ring shape with a fracture. The welding ring 40 is sleeved on the outer wall of the extending section 31 or the outer wall of the guide sleeve 20, and the welding ring 40 is annular or annular with a fracture, so that the installation is convenient and the structure is simple. When the valve seat 10, the guide sleeve 20 and the adapter 30 are welded together in a tunnel furnace, the welding ring 40 starts to melt, and the welding flux of the welding ring 40 is fluid and can flow after the welding ring is melted. Due to capillary action, the solder flows uniformly along the outer wall of the protruding section 31 or the outer wall of the guide sleeve 20 to the first gap 51 and the second gap 52, and both the first gap 51 and the second gap 52 are filled with the solder, so that the valve seat 10, the guide sleeve 20, and the adapter 30 are welded together.
In one embodiment, the first gap 51 has a pitch of less than 0.2 mm. Referring to fig. 4, in the electronic expansion valve 01 according to the present invention, gaps are respectively disposed between the valve seat 10 and the guide sleeve 20 and between the valve seat 10 and the connection pipe 30, and due to capillary action, the melted solder flows along the gaps between the valve seat 10 and the guide sleeve 20 and between the valve seat 10 and the connection pipe 30, and fills the first gap 51 and the second gap 52. Capillary action is also called capillary phenomenon, and when a thin tube is inserted into a liquid, the liquid rises or falls in the thin tube, and the phenomenon generated on the three-phase interface of solid, liquid and gas is the capillary phenomenon. The height of the rise and fall of the liquid in the capillary phenomenon can be determined by the following formula: h is 2 γ cos θ/(ρ gr). Wherein γ is surface tension; theta is a contact angle; ρ is the liquid density; g is the acceleration of gravity; r is the tubule radius. It will be appreciated that the height of the rise and fall of the liquid in the capillary phenomenon is related to the radius of the tubules. In the electronic expansion valve 01 of the present invention, the extent of the solder flow and the filling amount of the first gap 51 and the second gap 52 are related to the distance between the first gap 51 and the second gap 52. A first gap 51 is formed between the matching section 22 and the inner wall of the valve cavity 11, the distance between the first gap 51 is L1, and L1 is more than 0 and less than 0.2 mm. It will be appreciated that the mating section 22 is clearance fit with the inner wall of the valve chamber 11, so that the first clearance 51 is greater than 0 apart. When the distance between the first gaps 51 is greater than 0.2mm, the capillary action is not significant, which may result in the first gaps 51 being filled with solder, and the first gaps 51 being filled with little or no solder, so that the welding between the valve seat 10 and the guide sleeve 20 is weak or even impossible. The pitch of the first gaps 51 is less than 0.2 mm. The spacing of the first gaps 51 may be any value between 0-0.2mm, e.g., the spacing of the first gaps 51 may be 0.01mm, may be 0.15mm, may be 0.18mm, etc.
In one embodiment, the pitch of the second gap 52 is less than 0.2 mm. Referring to fig. 4, in the above embodiment, due to the capillary action, the melted solder flows along the gaps between the valve seat 10 and the guide sleeve 20 and between the valve seat 10 and the adapter tube 30, and fills the first gap 51 and the second gap 52. The extent of solder flow and how much of the first and second gaps 51, 52 are filled is related to the spacing of the first and second gaps 51, 52. The insertion section 32 and the inner wall of the side hole 12 form a second gap 52, and the distance between the second gap 52 and the inner wall of the side hole 12 is L2, and L2 is more than 0 mm and less than 0.2 mm. It will be appreciated that the insertion section 32 has a clearance fit with the inner wall of the lateral hole 12, so that the spacing of the second clearance 52 is greater than 0. When the distance between the second gap 52 and the nipple 30 is greater than 0.2mm, on the one hand, the capillary action may be insignificant, and solder may not flow into the second gap 52, and the second gap 52 is filled with little or no solder, so that the soldering between the valve seat 10 and the nipple 30 is weak or even impossible. On the other hand, if the distance between the second gaps 52 is too large, the solder required to fill the second gaps 52 increases, which may result in insufficient solder flowing to the first gaps 51, resulting in weak or even impossible soldering between the valve seat 10 and the guide sleeve 20. The pitch of the second gap 52 is less than 0.2 mm. The pitch of the second gap 52 may be any value between 0-0.2mm, e.g., the pitch of the second gap 52 may be 0.05mm, may be 0.12mm, may be 0.19mm, etc. In other embodiments, the pitch of the first gap 51 and the pitch of the second gap 52 may be the same, for example, when the pitch of the first gap 51 is 0.12mm, the pitch of the second gap 52 is also 0.12 mm. The pitch of the first gap 51 and the pitch of the second gap 52 may also be different, for example, when the pitch of the first gap 51 is 0.12mm, the pitch of the second gap 52 may be 0.06mm, and so on. And are not intended to be limiting herein.
The technical scheme of the utility model the electronic expansion valve 01 that provides, the welding of tunnel furnace is crossed with disk seat 10, takeover 30 together to uide bushing 20, welds ring 40 and sets up between disk seat 10, uide bushing 20 and takeover 30, simple to operate. During the welding, weld ring 40 and melt, fill up between disk seat 10 and the takeover 30 through the capillary action solder, and between uide bushing 20 and the disk seat 10 for uide bushing 20, disk seat 10, takeover 30 weld the jail, the utility model provides an electronic expansion valve 01 can reduce the uide bushing 20 among the prior art and the welding process of electronic expansion valve 01 of the laser welding of disk seat 10 to only need one installation to weld ring 40 and just solve the welding of 3 parts, not only simplified welding process, still the cost is reduced.
The above is only the optional embodiment of the present invention, and not therefore the limit to the patent scope of the present invention, all the concepts of the present invention utilize the equivalent structure transformation of the content of the specification and the attached drawings, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. An electronic expansion valve, comprising:
the valve seat is provided with a valve cavity and a side hole, and the side hole is communicated with the valve cavity;
the guide sleeve is arranged in the valve cavity and comprises a matching section, and a first gap is formed between the matching section and the inner wall of the valve cavity;
the connecting pipe comprises an extending section and an inserting section, and the extending section extends into the valve cavity; the insertion section penetrates through the side hole and forms a second gap with the inner wall of the side hole;
and the welding ring is arranged in the valve cavity, the welding ring is sleeved with the guide sleeve or the connecting pipe, and the welding ring flows to the first gap and the second gap when being melted.
2. The electronic expansion valve of claim 1, wherein the guide sleeve further comprises a step surface disposed at the bottom wall of the mating segment, and the step surface is connected to the outer wall of the mating segment, and the weld ring abuts against the step surface.
3. The electronic expansion valve of claim 2, further comprising a positioning section in the axial direction of the guide sleeve, wherein the fitting section is disposed between the positioning section and the step surface, and the positioning section is connected to the fitting section and abuts against the inner wall of the valve chamber.
4. The electronic expansion valve of claim 3, wherein the guide sleeve has an outer diameter at the positioning section that is greater than an outer diameter at the engagement section.
5. The electronic expansion valve of claim 3, wherein the guide sleeve further comprises a guide section, the step surface is arranged between the guide section and the positioning section, the guide section is connected with the step surface, and the end surface of the extending section facing one end of the valve cavity is abutted against the guide section.
6. The electronic expansion valve of claim 5, wherein the inner wall of the valve chamber, the step surface and the outer wall of the guide section enclose to form a receiving cavity, the receiving cavity is communicated with the first gap and the second gap, and the weld ring is received in the receiving cavity.
7. The electronic expansion valve of claim 5, wherein the welding ring is sleeved on the outer wall of the extending section, and the welding ring is respectively abutted against the inner wall of the valve chamber, the step surface and the outer wall of the guide section.
8. The electronic expansion valve of claim 1, wherein the weld ring is annular or has a broken annular shape.
9. The electronic expansion valve of claim 1, wherein the first gap has a pitch of less than 0.2 mm.
10. The electronic expansion valve of claim 9, wherein the second gap has a pitch of less than 0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221509735.3U CN217502603U (en) | 2022-06-16 | 2022-06-16 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221509735.3U CN217502603U (en) | 2022-06-16 | 2022-06-16 | Electronic expansion valve |
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| Publication Number | Publication Date |
|---|---|
| CN217502603U true CN217502603U (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221509735.3U Active CN217502603U (en) | 2022-06-16 | 2022-06-16 | Electronic expansion valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241260A1 (en) * | 2022-06-16 | 2023-12-21 | 广东威灵电机制造有限公司 | Electronic expansion valve |
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2022
- 2022-06-16 CN CN202221509735.3U patent/CN217502603U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241260A1 (en) * | 2022-06-16 | 2023-12-21 | 广东威灵电机制造有限公司 | Electronic expansion valve |
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