CN215371212U - Electronic expansion valve and refrigeration equipment - Google Patents
Electronic expansion valve and refrigeration equipment Download PDFInfo
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- CN215371212U CN215371212U CN202121648158.1U CN202121648158U CN215371212U CN 215371212 U CN215371212 U CN 215371212U CN 202121648158 U CN202121648158 U CN 202121648158U CN 215371212 U CN215371212 U CN 215371212U
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- peripheral wall
- core seat
- electronic expansion
- matching section
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Abstract
The utility model discloses an electronic expansion valve and refrigeration equipment, wherein the electronic expansion valve comprises: the valve body is provided with a valve cavity and a mounting opening communicated with the valve cavity, the mounting opening comprises a first matching section and a second matching section which are sequentially arranged along the axial direction of the mounting opening, the first matching section is arranged close to the valve cavity, and the inner diameter of the first matching section is smaller than that of the second matching section; the valve core seat is arranged at the mounting port and is provided with a valve port communicated with the valve cavity; the valve core seat is provided with a first peripheral wall and a second peripheral wall, the first peripheral wall is in interference fit with the first matching section, the second peripheral wall is in clearance fit with the second matching section and is provided with an opening, and the opening is used for being annularly arranged on the valve core seat and filling the welding ring close to the opening into the clearance after being melted. The utility model can solve the problem of poor welding between the valve core seat and the valve body.
Description
Technical Field
The utility model relates to the field of refrigeration equipment, in particular to an electronic expansion valve and refrigeration equipment.
Background
An electronic expansion valve is a throttling element that can be programmed to control the flow of refrigerant into a refrigeration unit. The electronic expansion valve is provided with a valve port and a valve needle for controlling the flow of the valve port, and the opening of the valve port is adjusted by adjusting the position of the valve needle, so that the flow of the refrigerant is changed. Because the electronic expansion valve is used for controlling the flow of liquid such as refrigerant and the like, a gap exists at the installation position in the installation process of a valve body and a valve core seat of the conventional electronic expansion valve, so that the problem of leakage occurs at the connection position of the valve body and the valve core seat.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an electronic expansion valve and refrigeration equipment, and aims to solve the problem that a gap exists at the connecting position of a valve body and a valve core seat in the prior art.
In order to achieve the above object, the present invention provides an electronic expansion valve, comprising:
the valve body is provided with a valve cavity and a mounting opening communicated with the valve cavity, the mounting opening comprises a first matching section and a second matching section which are sequentially arranged along the axial direction of the mounting opening, the first matching section is arranged close to the valve cavity, and the inner diameter of the first matching section is smaller than that of the second matching section;
the valve core seat is arranged at the mounting port and is provided with a valve port communicated with the valve cavity; the valve core seat is provided with a first peripheral wall and a second peripheral wall, the first peripheral wall is in interference fit with the first matching section, the second peripheral wall is in clearance fit with the second matching section and is provided with an opening, and the opening is used for being annularly arranged on the valve core seat and filling the welding ring close to the opening into the clearance after being melted.
Optionally, a gap between the second peripheral wall and the second mating segment is no greater than 0.1 mm.
Optionally, the length of the second peripheral wall is greater than the length of the first mating section in the axial direction of the valve core seat.
Optionally, a first step surface is formed between the first peripheral wall and the second peripheral wall, a second step surface facing away from the valve cavity is formed between the first matching section and the second matching section, and the first step surface abuts against the second step surface.
Optionally, the electronic expansion valve further comprises:
the connecting pipe is arranged outside the valve body and connected with the valve core seat.
Optionally, the adapter sleeve is arranged outside the valve core seat; and/or the adapter tube is in interference fit with the valve core seat.
Optionally, the outer diameter of the adapter tube is smaller than the inner diameter of the mounting opening.
Optionally, the nozzle portion is inserted into the mounting opening.
Optionally, the welding ring is further connected to the connection pipe and the valve body after being melted.
The utility model also proposes a refrigeration device comprising an electronic expansion valve according to any one of the preceding claims.
According to the technical scheme, the first matching section is in interference fit with the first peripheral wall, so that the coaxiality of the valve core seat and the valve body is improved, and the valve body and the valve core seat are fixed with each other; through second cooperation section and second periphery wall clearance fit, when welding ring welding melting, welding material can get into in the clearance between second periphery wall and the second cooperation section, fills the clearance between valve core seat and the installing port, prevents that welding defect from appearing and leading to leaking.
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 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 electronic expansion valve according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1, wherein 40 is a schematic structural view of the weld ring disposed around the valve core seat but not yet melted;
FIG. 3 is a schematic structural diagram of one embodiment of a valve body according to the present invention;
fig. 4 is a schematic structural view of an embodiment of the valve core seat of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
11 | |
| 12 | |
13 | |
| 14 | |
15 | |
| 20 | |
21 | First |
| 22 | Second |
23 | Valve |
| 24 | |
25 | |
| 26 | Third |
30 | Connecting |
| 40 | Welding ring |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment 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, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination 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 which can be used for a system pipeline of equipment such as a refrigerator, an air conditioner and the like and used for controlling the flow of fluid such as refrigerant and the like. The electronic expansion valve is connected with a system pipeline to realize input and output of the refrigerant. The electronic expansion valve is provided with a valve port 23 and a valve needle, wherein the valve needle is inserted into the valve port 23, and the opening degree of the valve port 23 is adjusted by adjusting the depth of the valve needle inserted into the valve port 23, so that the flow rate of refrigerant of the electronic expansion valve is adjusted. Fig. 1 to 4 are corresponding drawings of an embodiment of the present invention.
Referring to fig. 1 and 2, in an embodiment, the electronic expansion valve includes:
the valve body 10 is provided with a valve cavity 11 and a mounting opening 12 communicated with the valve cavity 11, the mounting opening 12 comprises a first matching section 13 and a second matching section 14 which are sequentially arranged along the axial direction of the mounting opening 12, the first matching section 13 is arranged close to the valve cavity 11, and the inner diameter of the first matching section 13 is smaller than that of the second matching section 14; the valve body 10 can be a housing of the electronic expansion valve, a cavity for installing a valve needle is formed inside the valve body 10, and the installation port 12 is communicated with the valve cavity 11. The first and second fitting sections 13 and 14 form stepped holes in the valve body 10. The first fitting section 13 is disposed close to the valve cavity 11, so that the mounting opening 12 is formed into a stepped structure with sequentially decreasing inner diameters from outside to inside.
The valve core seat 20 is arranged at the mounting port 12, and a valve port 23 communicated with the valve cavity 11 is formed in the valve core seat 20; the valve core seat 20 is provided with a first peripheral wall 21 matched with the first matching section 13 and a second peripheral wall 22 matched with the second matching section 14, the first matching section 13 is in interference fit with the first peripheral wall 21, and the second peripheral wall 22 is in clearance fit with the second matching section 14; the valve core seat 20 is inserted into the mounting opening 12 from the outside of the valve body 10, so that the first peripheral wall 21 of the valve core seat 20 is inserted into the first matching section 13, and the second peripheral wall 22 is inserted into the second matching section 14. Wherein, first perisporium 21 and first cooperation section 13 interference fit for first cooperation section 13 can be used for fixing the first perisporium 21 position of valve core seat 20, and the internal face of first perisporium 21 and first cooperation section 13 is laminated each other, so that valve core seat 20 can keep predetermined axiality state with installing port 12.
And the welding ring 40 is arranged outside the valve core seat 20 and is close to the gap opening of the second peripheral wall 22 and the second matching section 14. The welding ring 40 is disposed near the fitting gap of the second peripheral wall 22 and the second fitting section 14, so that the welding material generated when the welding ring 40 is melted can enter the fitting gap of the second peripheral wall 22 and the second fitting section 14. The second peripheral wall 22 and the second fitting section 14 are in clearance fit to form a fitting clearance, and the fitting clearance is formed with an opening, and the opening is used for filling the welded ring 40 which is annularly arranged on the valve core seat 20 and is close to the opening into the clearance after being melted.
The welding ring 40 is located outside the valve body 10, the welding ring 40 is in an annular structure, so that when the welding ring 40 is melted, an annular welding area can be generated at the position where the outside of the valve body 10 and the valve seat are contacted with each other, and in a welding material area which is substantially annular after melting, part of the welding material can uniformly enter an assembly gap formed between the second peripheral wall 22 and the second matching section 14. When the weld ring 40 is melted, the welding material simultaneously connects the valve core seat 20 and the outer wall of the valve body 10, so that the valve core seat 20 and the outer wall are pulled and fixed by the welding material. When the weld ring 40 is melted, a part of the weld material may penetrate into the fitting gap between the second peripheral wall 22 and the second fitting section 14, fill the fitting gap, and exert a traction action on the second peripheral wall 22 of the outer surface of the valve core seat 20 inside the mounting opening 12, thereby further improving the stability of the valve core seat 20.
Referring to fig. 3 and 4, since the first engaging portion 13 is disposed close to the valve port 23, the first engaging portion 13 can be used to block the welding material flowing from the assembling gap between the second engaging portion 14 and the second peripheral wall 22 toward the valve chamber 11, so that the welding material can fully fill the relatively limited assembling gap between the second peripheral wall 22 and the second engaging portion 14. Because the first peripheral wall 21 and the first fitting section 13 can play a role in limiting when in interference fit, after the welding material is filled in the fitting gap between the second fitting section 14 and the second peripheral wall 22, the valve core seat 20 is further kept in a stable state, so that the stability of the valve core seat 20 is improved. In an embodiment, a gap L between the second peripheral wall 22 and the second mating segment 14 is not greater than 0.1mm, and the gap between the second peripheral wall 22 and the second mating segment 14 is used for accommodating a welding material generated by melting of the welding ring 40, and when the fit gap is greater than 0.1mm, the fit gap is easily too large, so that the welding material cannot completely fill the fit gap, and a welding defect is easily generated.
Referring to fig. 3 and 4, in an embodiment, in the axial direction of the valve core seat 20, the length H1 of the second peripheral wall 22 is greater than the length H2 of the first mating section 13. When the first fitting section 13 is in interference fit with the first peripheral wall 21, the first fitting section 13 can limit the valve core seat 20, so that the valve core seat 20 keeps a preset state. The first peripheral wall 21 and the inner wall of the first matching section 13 are attached to each other, so that the valve core seat 20 and the mounting opening 12 keep a preset coaxiality. Along the axial direction of the valve core seat 20, the length of the assembly gap formed between the second matching section 14 and the second peripheral wall 22 is greater than the length of the contact surface between the first peripheral wall 21 and the first matching section 13, so that the length of the assembly gap between the valve core seat 20 and the valve body 10 is greater than the length of the mutual interference fit part, the welding material formed when the welding ring 40 is welded can enter the gap between the second peripheral wall 22 and the second matching section 14 more, and the welding material can play a role in drawing the inner walls of the valve core seat 20 and the mounting opening 12 while filling the assembly gap, thereby improving the stability of the valve core seat 20.
Since the valve cartridge 20 is typically used to connect an external nipple 30, the nipple 30 is connected to a system line. In this embodiment, the valve core seat 20 is installed in the installation opening 12 from the outside to the inside of the valve body 10, and the valve core seat 20 and the connection pipe 30 may be installed on the valve body 10 after being connected with each other, so that the connection of the connection pipe 30 is facilitated. Because the valve core seat 20 and the connecting pipe 30 are assembled from the outside, the rapid assembly can be conveniently realized, and the installation efficiency of the electronic expansion valve is improved. When the first peripheral wall 21 and the first fitting section 13 are in interference fit with each other, the valve core seat 20 can be pulled from the inner side, and when the weld ring is melted, the valve core seat 20 is pulled from the outer side, so that the two ends of the valve core seat 20 are pulled and fixed.
The valve port 23 is disposed on the valve core seat 20, and the valve port 23 needs to be coaxial with the valve needle inside the valve body 10, so that the valve needle can accurately control the opening degree of the valve port 23. The first fitting section 13 and the first peripheral wall 21 are in interference fit with each other, so that the valve port 23 and the valve needle can keep a preset coaxiality state, and the accuracy of flow control of the electronic expansion valve can be further improved. When the welding ring 40 is welded and melted, the welding material generated by the welding ring 40 can be annularly filled in the annular gap between the second peripheral wall 22 and the second matching section 14, so as to support the valve core seat 20 in the circumferential direction of the valve core seat 20, so that the valve core seat 20 is relatively uniformly stressed in the circumferential direction and is not easy to shift. Meanwhile, the first peripheral wall 21 and the first matching section 13 are matched with each other for limiting, otherwise, the valve core seat 20 is deflected, so that the valve port 23 can keep a higher coaxiality state with the valve needle according to a preset position.
Inside the valve body 10, a driving structure for driving the movement of the valve needle is generally provided, and thus the space inside the valve body 10 is relatively limited. Because the first matching section 13 is arranged close to the valve cavity 11, when the valve core seat 20 is installed, the valve core seat 20 can be inserted into the installation opening 12 from outside to inside, so that the installation of the valve core seat 20 is more convenient.
Optionally, a first step surface 24 is formed between the first peripheral wall 21 and the second peripheral wall 22, the first step surface 24 is disposed toward one side of the valve chamber 11, a second step surface 15 disposed opposite to the valve chamber 11 is formed between the first fitting section 13 and the second fitting section 14, and the first step surface 24 abuts against the second step surface 15. The outer diameter of the first peripheral wall 21 is smaller than that of the second peripheral wall 22, so that the junction of the first peripheral wall 21 and the second peripheral wall 22 forms the first step surface 24, and the first step surface 24 can be arranged along the radial direction of the valve core seat 20 and is perpendicular to the axial plane of the valve core seat 20. The inner diameter of the first matching section 13 is greater than that of the second matching section 14, so that the second step surface 15 is formed between the first matching section 13 and the second matching section 14, the second step surface 15 can be arranged along the radial direction of the mounting opening 12 and is perpendicular to the axial plane of the mounting opening 12, so that the first step surface 24 abuts against the second step surface 15, and the first step surface and the second step surface are mutually attached to limit the valve core seat 20. The maximum installation depth of the valve cartridge seat 20 can be determined by the first step surface 24 and the second step surface 15 cooperating with each other when the valve cartridge seat 20 is installed from the outside to the inside.
In an embodiment, the electronic expansion valve further includes a connection pipe 30 disposed outside the valve body 10, the connection pipe 30 is used for connecting a system pipeline, and the connection pipe 30 is connected to the valve cartridge seat 20, so that refrigerant can flow between the connection pipe 30 and the valve chamber 11 through the valve port 23. The nipple 30 may be a straight tube that connects to the valve cartridge seat 20. The valve body 10 may also be provided with a side pipe for connecting a system pipeline. Refrigerant can enter the valve chamber 11 through the side tube and enter the straight tube via the valve port 23. The refrigerant may also enter the valve chamber 11 through a straight tube and enter the system piping through a side tube.
The adapter tube 30 can abut against the outer surface of the valve body 10 to limit the position of the adapter tube 30. When the connection pipe 30 is installed, in order to facilitate installation, optionally, the connection pipe 30 is sleeved outside the valve core seat 20, and the connection pipe 30 and the valve core seat 20 may be connected and fixed to each other by welding. When the welding mode is adopted, the welding ring 40 may be annularly arranged on the outer portion of the adapter tube 30, so that when the welding ring 40 is welded and melted, part of the welding material can enter into a gap between the adapter tube 30 and the valve core seat 20. When the weld ring 40 is melted, the weld material connects the valve core seat 20, the valve body 10, and the adapter tube 30 at the same time.
Further optionally, the adapter 30 is in interference fit with the valve core seat 20, so as to fix the adapter 30 and the valve core seat 20 to each other. At this time, the adapter 30 may have a gap with the outer surface of the valve body 10, and the weld ring 40 is used to weld and fix the valve core seat 20 and the valve body 10.
When the end of the adapter tube 30 is disposed close to the valve body 10, the outer diameter of the adapter tube 30 may be smaller than the inner diameter of the mounting opening 12, so that the welding material generated by the welding fusion of the welding ring 40 can more easily enter the fitting gap between the second peripheral wall 22 and the second fitting section 14. Welding material can enter the gap between the adapter 30 and the valve core seat 20 to improve the sealing performance of the connection part of the adapter 30 and the valve core seat 20. Further optionally, the adapter tube 30 is partially inserted into the mounting opening 12, so that the mounting opening 12 can limit the position of the adapter tube 30. The outer diameter of the connecting pipe 30 is smaller than the inner diameter of the second matching section 14, so that a welding material generated when the welding ring 40 is melted can enter a gap between the connecting pipe 30 and the second matching section 14, and further, the sealing performance between the connecting pipe 30 and the valve core seat 20 and the sealing performance between the valve core seat 20 and the valve body 10 are improved, and the problem of poor welding is prevented.
When the welding ring 40 is installed, optionally, the welding ring 40 is annularly disposed outside the connection pipe 30 and respectively connects the connection pipe 30 and the valve body 10, and the welding ring 40 is disposed near an assembly gap between the connection pipe 30 and the second fitting section 14 so as to fill the assembly gap between the connection pipe 30 and the second fitting section 14.
When the valve core seat 20 is manufactured, a third peripheral wall 26 may be formed on the valve core seat 20, wherein an outer diameter of the third peripheral wall 26 is smaller than an outer diameter of the second peripheral wall 22, and the adapter 30 may be sleeved on an outer periphery of the third peripheral wall 26. A third step surface 25 is formed between the third peripheral wall 26 and the second peripheral wall 22, and an end surface of the adapter tube 30 can abut on the third step surface 25. The outer diameter of the adapter tube 30 can be equal to the outer diameter of the second peripheral wall 22, or can be larger than the outer diameter of the second peripheral wall 22 and smaller than the inner diameter of the second mating segment 14, so that the welding material can enter the assembly gap between the second peripheral wall 22 and the second mating segment 14. The third step surface 25 can limit the connecting pipe 30 so as to be conveniently positioned.
The utility model also proposes an embodiment of a refrigeration appliance comprising an electronic expansion valve as described in any one of the embodiments above. The electronic expansion valve is arranged on a system pipeline of the refrigeration equipment and can be used for adjusting the flow of a refrigerant of the refrigeration equipment. The refrigerant may be a refrigerator, an air conditioner, or the like. The valve core seat 20 of the electronic expansion valve is provided with a valve port 23 communicated with the inside of the valve cavity 11, when the valve needle inside the electronic expansion valve moves relatively, the depth of the valve needle inserted into the valve port 23 changes, and further the flow rate of the refrigerant at the valve port 23 changes. The valve core seat 20 is matched with the mounting opening 12 of the valve body 10, so that the valve core seat 20 and the mounting opening can keep a preset coaxial state when being fixed on the mounting opening. The welding material generated by melting the welding ring 40 fills the fit clearance between the valve core seat 20 and the inner wall of the mounting opening 12, so that the effect of improving welding defects is achieved. The first matching section 13 of the mounting port 12 is arranged close to the valve cavity 11, so that the valve core seat 20 can be mounted from outside to inside, the mounting convenience of the valve core seat 20 is improved, and meanwhile, the external connecting pipe 30 can be mounted conveniently.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An electronic expansion valve, comprising:
the valve body is provided with a valve cavity and a mounting opening communicated with the valve cavity, the mounting opening comprises a first matching section and a second matching section which are sequentially arranged along the axial direction of the mounting opening, the first matching section is arranged close to the valve cavity, and the inner diameter of the first matching section is smaller than that of the second matching section;
the valve core seat is arranged at the mounting port and is provided with a valve port communicated with the valve cavity; the valve core seat is provided with a first peripheral wall and a second peripheral wall, the first peripheral wall is in interference fit with the first matching section, the second peripheral wall is in clearance fit with the second matching section and is provided with an opening, and the opening is used for being annularly arranged on the valve core seat and filling the welding ring close to the opening into the clearance after being melted.
2. The electronic expansion valve of claim 1, wherein a gap between the second peripheral wall and the second mating segment is no greater than 0.1 mm.
3. The electronic expansion valve of claim 1, wherein the length of the second peripheral wall is greater than the length of the first mating segment in the axial direction of the valve core seat.
4. The electronic expansion valve according to claim 1, wherein a first step surface is formed between the first peripheral wall and the second peripheral wall, a second step surface arranged opposite to the valve chamber is formed between the first fitting section and the second fitting section, and the first step surface abuts against the second step surface.
5. An electronic expansion valve according to any of claims 1-4, further comprising:
the connecting pipe is arranged outside the valve body and connected with the valve core seat.
6. The electronic expansion valve of claim 5, wherein the adapter sleeve is disposed outside the valve core seat; and/or the adapter tube is in interference fit with the valve core seat.
7. The electronic expansion valve of claim 5, wherein the nipple has an outer diameter smaller than an inner diameter of the mounting opening.
8. The electronic expansion valve of claim 7, wherein the nipple portion is provided inserted into the mounting opening.
9. The electronic expansion valve of claim 7, wherein the weld ring is fused and then connected to the nipple and the valve body, respectively.
10. Refrigeration device, characterized in that it comprises an electronic expansion valve according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121648158.1U CN215371212U (en) | 2021-07-19 | 2021-07-19 | Electronic expansion valve and refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121648158.1U CN215371212U (en) | 2021-07-19 | 2021-07-19 | Electronic expansion valve and refrigeration equipment |
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| Publication Number | Publication Date |
|---|---|
| CN215371212U true CN215371212U (en) | 2021-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121648158.1U Active CN215371212U (en) | 2021-07-19 | 2021-07-19 | Electronic expansion valve and refrigeration equipment |
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| Country | Link |
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| CN (1) | CN215371212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607783A (en) * | 2022-01-26 | 2022-06-10 | 广东威灵电机制造有限公司 | Electronic expansion valve and refrigeration equipment |
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2021
- 2021-07-19 CN CN202121648158.1U patent/CN215371212U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607783A (en) * | 2022-01-26 | 2022-06-10 | 广东威灵电机制造有限公司 | Electronic expansion valve and refrigeration equipment |
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