CN212389757U

CN212389757U - Electronic expansion valve

Info

Publication number: CN212389757U
Application number: CN202020730890.2U
Authority: CN
Inventors: 楼金强; 詹少军; 曾庆军
Original assignee: Zhejiang DunAn Hetian Metal Co Ltd
Current assignee: Zhejiang DunAn Hetian Metal Co Ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-01-22
Anticipated expiration: 2030-05-06

Abstract

The utility model provides an electronic expansion valve, this electronic expansion valve includes: a housing having a mounting hole; the valve seat core penetrates through the mounting hole and comprises a press mounting section and a guide section, the press mounting section is in interference fit with the mounting hole, and a solder channel is arranged between the press mounting section and the hole wall of the mounting hole; the connecting end of the connecting pipe is sleeved on the guide section and inserted into the mounting hole. Through the technical scheme that this application provided, can solve the poor and complicated problem of technology of valve seat core and casing axiality among the prior art.

Description

Electronic expansion valve

Technical Field

The utility model relates to an electronic expansion valve technical field particularly, relates to an electronic expansion valve.

Background

Generally, an electronic expansion valve includes a housing, a valve core assembly and a valve seat core, wherein the valve core assembly and the valve seat core are both disposed in the housing, a valve port is disposed on the valve seat core, and the valve core assembly is used for controlling the opening and closing of the valve port. Wherein, be provided with the mounting hole on the casing, the disk seat core wears to establish in the mounting hole and with the loose cooperation of mounting hole, and the connecting pipe cover is established on the disk seat core.

In the prior art, in order to assemble the valve seat core, the shell and the connecting pipe, the valve seat core and the shell are firstly welded and positioned in a laser spot welding mode, then the connecting pipe is sleeved on the valve seat core, the welding ring is sleeved outside the connecting pipe, and finally the valve seat core, the shell and the connecting pipe are welded and fixed in a furnace welding mode.

However, since the valve seat core is loosely fitted to the mounting hole, it is difficult to ensure the coaxiality of the valve seat core and the housing when spot welding the valve seat core and the housing, which affects the performance of the device. Therefore, the problems of poor coaxiality of the valve seat core and the shell and complex process exist in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve to solve the poor and complicated problem of technology of valve seat core and casing axiality among the prior art.

The utility model provides an electronic expansion valve, electronic expansion valve includes: a housing having a mounting hole; the valve seat core penetrates through the mounting hole and comprises a press mounting section and a guide section, the press mounting section is in interference fit with the mounting hole, and a solder channel is arranged between the press mounting section and the hole wall of the mounting hole; the connecting end of the connecting pipe is sleeved on the guide section and inserted into the mounting hole.

Furthermore, a flow groove is arranged on the side wall of the press-fitting section and/or the hole wall of the mounting hole, and the flow groove forms a solder passage.

Furthermore, the diameter of the guide section is smaller than or equal to that of the press-fitting section, and the circulation grooves are formed in the side wall of the press-fitting section.

Further, the electronic expansion valve further comprises a first solder cavity arranged between the connecting end of the connecting pipe and the shell, the shell is provided with a bottom wall, the mounting hole penetrates through the inner side and the outer side of the bottom wall, the first solder cavity is arranged close to the outer side of the bottom wall, and the first solder cavity is communicated with one end of the solder channel.

Further, the one end of the outside that is close to the diapire of mounting hole is provided with first annular groove, and the interval between the outer wall of the link of first annular groove and connecting pipe forms first welding material chamber.

Further, the electronic expansion valve further comprises a second solder cavity arranged between the valve seat core and the shell, the second solder cavity is arranged close to the inner side of the bottom wall, and the second solder cavity is communicated with the other end of the solder channel.

Further, one end of the mounting hole, which is close to the inner side of the bottom wall, is provided with a second annular groove, and a second solder cavity is formed by the interval between the second annular groove and the valve seat core.

Further, the valve seat core further comprises a limiting section, the limiting section is located at one end, far away from the guide section, of the press mounting section, the diameter of the limiting section is larger than that of the press mounting section, the limiting section is abutted to the bottom wall of the second annular groove, and a second welding material cavity is formed between the outer wall of the limiting section and the second annular groove at intervals.

Furthermore, the press-fitting section is connected with the guide section, and the end wall of the connecting pipe is abutted against the end wall of the press-fitting section.

Further, the mounting hole comprises a first hole section and a second hole section which are connected with each other, the first hole section is located above the second hole section, the aperture of the first hole section is smaller than that of the second hole section, the press mounting section is in interference fit with the first hole section, the solder channel is arranged between the press mounting section and the first hole section, and the connecting end of the connecting pipe is sleeved on the guide section and inserted into the second hole section.

Use the technical scheme of the utility model, this electronic expansion valve includes casing, disk seat core and connecting pipe, and the disk seat core is worn to establish in the mounting hole of casing. Through the press fitting section of the valve seat core and the interference fit of the mounting hole, the valve seat core is not required to be positioned in a spot welding mode, the coaxiality of the valve seat core and the shell can be ensured, and the processing technology is simplified. And, establish the link cover of connecting pipe on the direction section and insert in the mounting hole, set up the solder passageway between the pore wall of pressure equipment section and mounting hole, be convenient for make the solder circulate between connecting pipe, mounting hole and disk seat core three, can promote welding strength.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of an electronic expansion valve according to an embodiment of the present invention;

FIG. 2 shows a partial enlarged view at A in FIG. 1;

fig. 3 shows a schematic view of the valve seat core of fig. 1.

Wherein the figures include the following reference numerals:

10. a housing; 11. a bottom wall; 12. a sleeve; 13. a valve body; 20. a valve seat core; 21. a press mounting section; 22. a guide section; 23. a limiting section; 30. a solder channel; 31. a circulation tank; 40. a connecting pipe; 50. a first solder cavity; 51. a first annular groove; 60. a second solder cavity; 61. a second annular groove; 70. and (7) welding a ring.

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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.

As shown in fig. 1 to 3, an embodiment of the present invention provides an electronic expansion valve, which includes a housing 10, a valve seat core 20, and a connecting pipe 40. The housing 10 has a mounting hole, and the valve seat core 20 is inserted into the mounting hole. Specifically, the valve seat core 20 includes a press-fitting section 21 and a guide section 22, and the press-fitting section 21 is in interference fit with the mounting hole, so that the coaxiality of the valve seat core 20 and the housing 10 can be ensured. In this embodiment, a solder channel 30 is provided between the press-fitting section 21 and the hole wall of the mounting hole, the connecting end of the connecting pipe 40 is sleeved on the guiding section 22 and inserted into the mounting hole, the welding ring 70 is sleeved on the outer wall of the connecting pipe 40, and then the valve seat core 20, the housing 10 and the connecting pipe 40 are fixed by using a furnace welding mode, so that the solder can circulate among the valve seat core 20, the housing 10 and the connecting pipe 40, and the welding firmness can be improved.

By applying the electronic expansion valve provided by the embodiment, the press-fitting section 21 is in interference fit with the mounting hole, so that the coaxiality of the valve seat core 20 and the shell 10 can be ensured, the valve seat core 20 is not required to be positioned in a spot welding manner, the processing technology can be simplified, and the processing cost can be reduced. And, establish the link cover of connecting pipe 40 on the direction section 22 and insert in the mounting hole, have the welding seam between the outer wall of connecting pipe 40 and the inner wall of mounting hole, and be provided with solder passageway 30 between the pore wall of pressure equipment section 21 and mounting hole, strengthened the trend that the solder toward the mounting hole infiltration guide, be convenient for the solder circulate between connecting pipe 40, mounting hole and valve seat core 20 three, can promote welding strength, need not to judge whether the welding seam between the inner wall of connecting pipe 40 and the valve seat core has the welding seam, and the technology is simpler, reliable.

The solder channel 30 includes a structure of grooving, knurling, inserting flower, thread line, etc. on the press-mounting section 21 and/or the mounting hole, and also includes a structure of arranging a flow-through tube between the press-mounting section 21 and the mounting hole to form a solder channel, and the forming mode and the structure of the solder channel are not limited as long as the solder can flow through the solder channel.

Specifically, the side walls of the press-fitting section 21 and/or the wall of the mounting hole are provided with flow grooves 31, and the flow grooves 31 form the solder passages 30. The mode of forming the solder channel 30 by arranging the circulation groove 31 has the advantages of simple structure and convenient processing. In this embodiment, the side wall of the press-fitting section 21 is provided with a flow groove 31. In other embodiments, the flow channels 31 may be provided in the walls of the mounting holes, or both the press-fitting section and the mounting holes.

As shown in fig. 2 and 3, the guide section 22 has a smaller diameter than the press-fitting section 21, and the flow grooves 31 are provided in the side walls of the press-fitting section 21. Specifically, the circulation grooves 31 are disposed through the upper and lower sides of the press-fitting section 21 to facilitate the circulation of the solder in the mounting holes. Wherein, a plurality of circulation grooves 31 can be arranged on the side wall of the press-fitting section 21 to improve the circulation capacity. In the present embodiment, the flow channel 31 is an edge milling channel.

As shown in fig. 1 and 2, the electronic expansion valve further includes a first solder chamber 50 disposed between the connection end of the connection pipe 40 and the housing 10. Wherein, the housing 10 has a bottom wall 11, the mounting hole penetrates the inner side and the outer side of the bottom wall 11, the first solder cavity 50 is disposed near the outer side of the bottom wall 11, and the first solder cavity 50 is communicated with one end of the solder channel 30. Through setting up first solder cavity 50, utilize first solder cavity 50 to collect the welding material and hold, can promote the welding fastness of connecting pipe in the diapire outside.

In the present embodiment, one end of the mounting hole near the outside of the bottom wall 11 is provided with a first annular groove 51, and the space between the first annular groove 51 and the outer wall of the connection end of the connection pipe 40 forms the first solder chamber 50. The welding ring 70 is sleeved on the outer wall of the connecting pipe 40, so that the welding ring 70 covers the first annular groove 51, when the welding ring is melted, the solder can flow into the welding seams among the connecting pipe 40, the mounting hole and the valve seat core 20, and the rest of the solder can be contained in the first annular groove 51, so that the welding strength can be improved, and the solder can be prevented from flowing to other parts.

As shown in fig. 1 and 2, the electronic expansion valve further includes a second solder chamber 60 disposed between the valve seat core 20 and the housing 10, the second solder chamber 60 being disposed near the inner side of the bottom wall 11, the second solder chamber 60 communicating with the other end of the solder passage 30. With the above structure, the solder can fill the weld joints among the connecting pipe 40, the mounting hole, and the valve seat core 20 through the first solder chamber 50, the solder channel 30, and the second solder chamber 60, and can ensure the welding strength.

In the present embodiment, one end of the mounting hole near the inner side of the bottom wall 11 is provided with a second annular groove 61, and the space between the second annular groove 61 and the valve seat core 20 forms a second solder chamber 60. The mode that the annular groove is arranged to form the solder cavity is adopted, and the welding wire has the advantages of convenience in processing and low cost.

As shown in fig. 2 and 3, the valve seat core 20 further includes a limiting section 23, the limiting section 23 is located at an end of the press-fitting section 21 away from the guide section 22, and the limiting section 23 is used for limiting the position of the valve seat core 20 in the mounting hole, so as to avoid excessive press-fitting of the valve seat core. Specifically, the diameter of the limiting section 23 is larger than that of the press-fitting section 21, and the limiting section 23 abuts against the bottom wall 11 of the second annular groove 61 to limit the position of the valve seat core 20 in the mounting hole. Wherein the space between the outer wall of the stopper section 23 and the second annular groove 61 forms a second solder chamber 60.

In this embodiment, the press-fitting section 21 is connected to the guide section 22, and the end wall of the connection pipe 40 abuts against the end wall of the press-fitting section 21, so that the connection pipe can be positioned and assembled by the press-fitting section. In other embodiments, the press-fitting section and the guide section may not be connected to each other, as long as the press-fitting section and the mounting hole are in interference fit, and the connecting pipe is sleeved on the guide section and inserted into the mounting hole.

In this embodiment, there are gaps between the inner wall of the mounting hole and the flow channel on the valve seat core, between the inner wall of the mounting hole and the outer wall of the connecting tube, and between the inner wall of the connecting tube and the outer wall of the guide section, which gaps form weld seams.

In the present embodiment, the housing 10 includes a sleeve 12 and a valve body 13 connected to each other, and a mounting hole is provided in the valve body 13. The casing 10 is divided into the sleeve 12 and the valve body 13, so that the assembly is facilitated, and the assembly efficiency can be improved.

In this embodiment, the electronic expansion valve further includes a valve core assembly, the valve core assembly is disposed in the housing 10, a valve port is disposed on the valve seat core 20, and the valve core assembly is used for controlling the opening and closing of the valve port.

The utility model discloses still another embodiment provides an electronic expansion valve, this embodiment lies in with the difference of last embodiment, in this embodiment, the mounting hole includes interconnect's first hole section and second hole section, first hole section is located second hole section top, the aperture of first hole section is less than the aperture of second hole section, pressure equipment section 21 and first hole section interference fit, solder passageway 30 sets up between pressure equipment section 21 and first hole section, the link cover of connecting pipe 40 is established on direction section 22 and is inserted in the second hole section. Specifically, the diameters of the press-fitting section and the guide section can be the same or different, as long as the press-fitting section and the first hole section are in interference fit, and the connecting pipe is sleeved on the guide section and inserted into the second hole section.

The device provided by the embodiment has the following beneficial effects:

(1) the valve seat core is in interference fit with the shell, so that the coaxiality of the valve seat core and the shell can be better ensured;

(2) the valve seat core is provided with a circulation groove for penetration of solder into the shell in the welding process to ensure the welding quality;

(3) laser spot welding is reduced, the process is simple, and the cost can be reduced;

(4) the connecting pipe is embedded in the end face of the bottom wall of the shell, a welding seam is arranged between the connecting pipe and the mounting hole of the shell, the trend of guiding the solder to the mounting hole in a soaking mode is enhanced in the welding process, poor welding of the solder between the connecting pipe and the shell can be reduced compared with the existing structure, whether the welding seam between the inner wall of the connecting pipe and the outer wall of the valve seat core is welded by the solder is not needed to be evaluated, and the process is simpler and more reliable.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electronic expansion valve, comprising:

a housing (10) having a mounting hole;

the valve seat core (20) penetrates through the mounting hole, the valve seat core (20) comprises a press-fitting section (21) and a guide section (22), the press-fitting section (21) is in interference fit with the mounting hole, and a solder channel (30) is arranged between the press-fitting section (21) and the hole wall of the mounting hole;

and the connecting end of the connecting pipe (40) is sleeved on the guide section (22) and inserted into the mounting hole.

2. An electronic expansion valve according to claim 1, wherein a flow groove (31) is provided on a side wall of the press-fitting section (21) and/or on a wall of the mounting hole, the flow groove (31) forming the solder passage (30).

3. An electronic expansion valve according to claim 2, wherein the diameter of the guide section (22) is smaller than or equal to the diameter of the press-fitting section (21), and the flow grooves (31) are provided in the side walls of the press-fitting section (21).

4. An electronic expansion valve according to claim 1, further comprising a first solder chamber (50) arranged between the connecting end of the connecting tube (40) and the housing (10), the housing (10) having a bottom wall (11), the mounting hole extending through an inner side and an outer side of the bottom wall (11), the first solder chamber (50) being arranged adjacent to the outer side of the bottom wall (11), the first solder chamber (50) being in communication with one end of the solder passage (30).

5. An electronic expansion valve according to claim 4, wherein an end of the mounting hole close to the outside of the bottom wall (11) is provided with a first annular groove (51), the spacing between the first annular groove (51) and the outer wall of the connection end of the connection tube (40) forming the first solder chamber (50).

6. An electronic expansion valve according to claim 4, further comprising a second solder chamber (60) arranged between the valve seat core (20) and the housing (10), the second solder chamber (60) being arranged close to the inner side of the bottom wall (11), the second solder chamber (60) being in communication with the other end of the solder passage (30).

7. An electronic expansion valve according to claim 6, wherein an end of the mounting hole close to the inner side of the bottom wall (11) is provided with a second annular groove (61), the spacing between the second annular groove (61) and the valve seat core (20) forming the second solder chamber (60).

8. The electronic expansion valve according to claim 7, wherein the valve seat core (20) further comprises a limiting section (23), the limiting section (23) is located at one end of the press-fitting section (21) far away from the guide section (22), the diameter of the limiting section (23) is larger than that of the press-fitting section (21), the limiting section (23) abuts against the bottom wall (11) of the second annular groove (61), and the second solder cavity (60) is formed by the space between the outer wall of the limiting section (23) and the second annular groove (61).

9. An electronic expansion valve according to claim 1, wherein the press-fitting section (21) is connected to the guide section (22), and the end wall of the connecting tube (40) abuts against the end wall of the press-fitting section (21).

10. An electronic expansion valve according to claim 1, wherein the mounting hole comprises a first hole section and a second hole section connected to each other, the first hole section is located above the second hole section, the first hole section has a smaller hole diameter than the second hole section, the press-fitting section (21) is in interference fit with the first hole section, the solder passage (30) is provided between the press-fitting section (21) and the first hole section, and the connecting end of the connecting pipe (40) is fitted over the guide section (22) and inserted into the second hole section.