CN210920141U

CN210920141U - Electronic expansion valve

Info

Publication number: CN210920141U
Application number: CN201921637697.8U
Authority: CN
Inventors: 詹少军; 冯贵刚; 何秋波
Original assignee: Zhejiang DunAn Hetian Metal Co Ltd
Current assignee: Zhejiang DunAn Hetian Metal Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-07-03
Anticipated expiration: 2029-09-27

Abstract

The utility model provides an electronic expansion valve, this electronic expansion valve includes: the valve seat comprises a body and a mounting boss, the mounting boss is arranged at one end of the body, which is far away from the sleeve, and a valve port is arranged on the mounting boss; the second pipe fitting is sleeved on the mounting boss, a welding ring accommodating part is arranged between the inner wall of the second pipe fitting and the outer side wall of the mounting boss, and the welding ring accommodating part is used for placing a welding ring. Through the technical scheme that this application provided, can solve the problem that is difficult to detect welding quality 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

At present, an electronic expansion valve includes a housing, a first pipe and a second pipe, the first pipe is disposed corresponding to an inlet on the housing, and the second pipe is disposed corresponding to an outlet on the housing. Wherein, be provided with the installation boss on the casing, the second pipe fitting cover is established on the installation boss.

In the prior art, in order to connect the second pipe with the housing, the second pipe is firstly sleeved on the mounting boss, then the welding ring is sleeved on the outer side of the second pipe, and the connection is completed by using a welding mode. When welding, can be through the mouth of pipe that is kept away from the welding end of second pipe fitting detection welding quality.

However, in the prior art, it is difficult for the staff to accurately judge the welding quality of the welding end from the nozzle away from the welding end. And, when the second pipe fitting is the return bend, staff can't detect the welding quality. Therefore, the prior art has the problem that the welding quality is difficult to detect.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve to solve the problem that is difficult to detect welding quality among the prior art.

The utility model provides an electronic expansion valve, electronic expansion valve includes: the valve seat comprises a body and a mounting boss, the mounting boss is arranged at one end of the body, which is far away from the sleeve, and a valve port is arranged on the mounting boss; the second pipe fitting is sleeved on the mounting boss, a welding ring accommodating part is arranged between the inner wall of the second pipe fitting and the outer side wall of the mounting boss, and the welding ring accommodating part is used for placing a welding ring.

Further, the weld ring accommodating portion is provided on the mounting boss.

Further, an accommodating groove is formed in the outer side wall of the installation boss and annularly arranged along the circumferential direction of the installation boss, and a welding ring accommodating portion is formed by the accommodating groove.

Further, the holding tank is located the one end of installation boss far away from the body.

Furthermore, a flow guide structure is arranged between the second pipe fitting and the mounting boss and used for circulating solder.

Furthermore, a diversion trench is arranged on the inner wall of the second pipe fitting.

Further, the electronic expansion valve further includes: the first pipe fitting is arranged in the inlet hole and partially extends into the shell; the guide sleeve is arranged in the shell, a limiting structure is arranged between the guide sleeve and the first pipe fitting, and the limiting structure is used for limiting the length size of the first pipe fitting extending into the shell.

Furthermore, a limiting boss is arranged on the guide sleeve and corresponds to the end face of the first pipe fitting.

Further, spacing boss sets up along the circumference of uide bushing ring.

Further, the electronic expansion valve further includes: a rotor rotatably disposed within the housing; the screw is arranged in the shell, and the rotor is in driving connection with the screw; the valve needle assembly is movably arranged in the shell, one end of the screw is connected with the valve needle assembly so as to drive the valve needle assembly to move axially through the screw, and the valve needle assembly is arranged corresponding to the valve port; the nut assembly is provided with a nut guide section on the guide sleeve, and the nut assembly is sleeved on the nut guide section.

Use the technical scheme of the utility model, this electronic expansion valve include casing and second pipe fitting, and the casing includes interconnect's sleeve pipe and disk seat, and the disk seat includes body and installation boss. Specifically, the installation boss sets up the one end of keeping away from the sleeve pipe at the body, and is provided with the valve port on the installation boss. The second pipe fitting is sleeved on the mounting boss, the welding ring accommodating part is arranged between the inner wall of the second pipe fitting and the outer side wall of the mounting boss, and the welding ring can be placed in the welding ring accommodating part. Adopt above-mentioned structure, because weld the ring setting inside the second pipe fitting, when welding the second pipe fitting, through whether have the solder to spill between second pipe fitting and disk seat in the outside observation of second pipe fitting, can accurately judge the welding quality, the staff of being convenient for detects. And, the judgment of the welding quality is not limited by the tube type of the second pipe fitting.

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 cross-sectional view of the second tube member and valve seat of FIG. 1;

FIG. 3 shows an assembly view of the guide sleeve and valve seat of FIG. 1;

FIG. 4 shows a further assembly view of the guide sleeve and valve seat of FIG. 1;

FIG. 5 shows an assembly of the second tube member with the valve seat of FIG. 1;

FIG. 6 shows an assembly of the first tube member and valve seat of FIG. 1;

fig. 7 is a schematic structural diagram of an electronic expansion valve according to an embodiment of the present invention;

FIG. 8 shows an assembly of the first tube member of FIG. 7 with the valve seat;

fig. 9 shows a schematic structural view of the guide sleeve in fig. 7.

Wherein the figures include the following reference numerals:

10. a housing; 11. a sleeve; 12. a valve seat; 122. a body; 123. mounting a boss; 123a, accommodating grooves; 20. a guide sleeve; 22. a nut guide section; 23. a limiting boss; 30. a nut assembly; 40. a rotor; 50. a screw; 60. a valve needle assembly; 70. a first pipe member; 80. a limiting structure; 90. a second pipe member; 100. a weld ring accommodating portion; 110. 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 6, an embodiment of the present invention provides an electronic expansion valve, which includes a housing 10 and a second pipe 90, wherein the housing 10 includes a sleeve 11 and a valve seat 12 connected to each other. The valve seat 12 includes a body 122 and a mounting boss 123, the mounting boss 123 is disposed at an end of the body 122 far away from the sleeve 11, and a valve port is disposed on the mounting boss 123. Specifically, the second pipe 90 is sleeved on the mounting boss 123, the second pipe 90 is communicated with the valve port, and the refrigerant in the electronic expansion valve can flow out through the second pipe 90 through the valve port. In the present embodiment, a welding ring accommodating portion 100 is disposed between the inner wall of the second pipe 90 and the outer side wall of the mounting boss 123, and the welding ring accommodating portion 100 is used for placing a welding ring 110. Here, the weld ring receiver 100 may be disposed on the inner wall of the second pipe 90, or on the outer sidewall of the mounting boss 123, or on both the inner wall of the second pipe 90 and the outer sidewall of the mounting boss 123.

By applying the electronic expansion valve provided by the embodiment, since the welding ring 110 is disposed inside the second pipe 90, when the second pipe 90 is welded, whether solder leaks from between the second pipe 90 and the valve seat 12 is observed outside the second pipe 90, so that the welding quality can be accurately judged, and the detection by staff is facilitated. Moreover, the judgment of the welding quality is not limited by the pipe type of the second pipe fitting 90, and can be used for judging the bent pipe. Because less solder is accumulated outside the second pipe 90 after welding, positioning and press fitting after the device can be effectively ensured.

In the present embodiment, the weld ring receptacle 100 is provided on the mounting boss 123. The welding ring accommodating portion 100 may be disposed in the middle of the mounting boss 123, or disposed at both ends of the mounting boss 123. By providing the weld ring accommodating portion 100 on the mounting boss 123, the weld ring accommodating portion 100 can be easily processed, and the processing cost can be reduced.

Specifically, the outer side wall of the mounting boss 123 is provided with a receiving groove 123a, the receiving groove 123a is annularly arranged along the circumferential direction of the mounting boss 123, and the receiving groove 123a forms the solder ring accommodating portion 100. Wherein, the holding groove 123a can set up in the middle part of installation boss 123, also can set up the both ends at installation boss 123, and sets up holding groove 123a and have the advantage of being convenient for processing.

In the present embodiment, the receiving groove 123a is located at an end of the mounting boss 123 far from the body 122. By adopting the structure, the accommodating groove 123a can be formed only by turning the end, far away from the body 122, of the mounting boss 123, so that the processing cost can be further reduced, and the welding ring 110 can be conveniently placed.

In order to smoothly flow the solder between the second pipe 90 and the mounting boss 123, a flow guide structure is arranged between the second pipe 90 and the mounting boss 123, and the flow guide structure is used for circulating the solder, so that the welding effect can be improved, and the welding quality can be conveniently detected.

In this embodiment, the inner wall of the second pipe 90 is provided with a diversion trench, and the diversion trench forms a diversion structure. Wherein, the end surface of the second pipe 90 can be provided with emboss, and the solder can be guided by the emboss.

As shown in fig. 7 to 9, the electronic expansion valve includes a first pipe member 70 and a guide sleeve 20. Wherein, the housing 10 has an inlet hole and an outlet hole which are communicated with each other, the outlet hole is disposed corresponding to the valve port, and the first pipe 70 is disposed in the inlet hole and partially extends into the housing 10. Specifically, the guide sleeve 20 is disposed in the housing 10, and a limiting structure 80 is disposed between the guide sleeve 20 and the first pipe 70, where the limiting structure 80 is used to limit the length of the first pipe 70 extending into the housing 10. The position-limiting structure 80 may be disposed on the guide sleeve 20, or on the first pipe 70, or on both the guide sleeve 20 and the first pipe 70. Through set up limit structure 80 between uide bushing 20 and first pipe fitting 70, can utilize limit structure 80 to restrict the length dimension that first pipe fitting 70 stretched into casing 10, need not to carry out the throat to first pipe fitting 70 so, utilize limit structure 80 can control the length dimension that first pipe fitting 70 stretched into casing 10 accurately to can not increase the flow resistance of first pipe fitting 70, and then can satisfy the user demand. In addition, since the first pipe 70 does not need to be constricted, the processing cost can be reduced.

In this embodiment, the guide sleeve 20 is provided with a limiting boss 23, the limiting boss 23 is disposed corresponding to the end surface of the first pipe element 70, and the limiting boss 23 forms a limiting structure 80. When the length of the first pipe element 70 extending into the housing 10 reaches the preset size, the end surface of the first pipe element 70 abuts against the limit boss 23, so that the limit boss 23 can be used for limiting the first pipe element 70 to continuously move relative to the housing 10. In other embodiments, a limiting boss may be disposed on the end surface of the first pipe element 70, so that the limiting boss is higher than the end surface of the first pipe element 70, and can also perform a limiting function.

Specifically, the limit boss 23 is annularly arranged along the circumferential direction of the guide sleeve 20. By adopting the structure, the turning amount of the guide sleeve 20 can be reduced, the machining efficiency and the service life of the cutter can be improved, and the cost is reduced.

The electronic expansion valve further includes a rotor 40, a screw 50, a valve needle assembly 60, and a nut assembly 30. Specifically, the rotor 40 is rotatably disposed in the housing 10, the screw 50 is disposed in the housing 10, the rotor 40 is drivingly connected to the screw 50, the needle assembly 60 is movably disposed in the housing 10, one end of the screw 50 is connected to the needle assembly 60 to drive the needle assembly 60 to axially move through the screw 50, the needle assembly 60 is disposed corresponding to the valve port, the guide sleeve 20 is disposed with the nut guide section 22, and the nut assembly 30 is sleeved on the nut guide section 22. Specifically, the nut assembly 30 is press-fitted onto the nut guide section 22 of the guide sleeve 20, and during the press-fitting process, the nut guide section 22 can position and guide the nut assembly 30.

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

(1) after the welding of the second pipe 90 and the housing 10 is completed, the joint of the second pipe 90 and the valve seat 12 can be observed from the outside of the second pipe 90, and if there is solder in the area, it indicates that the solder has passed through the second pipe 90 and the valve seat 12;

(2) the judgment of the welding quality is not influenced by the shape of the second pipe fitting 90 and can be used for judging the bent pipe;

(3) after the welding of the second pipe 90 and the housing 10 is completed, less solder is accumulated on the outer wall of the second pipe 90 connected with the valve seat 12, so that the positioning and press-fitting of a subsequent device can be effectively ensured;

(4) since the amount of solder deposited is reduced, the amount of solder used can be reduced, and the cost can be reduced.

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:

the valve seat (12) comprises a body (122) and a mounting boss (123), the mounting boss (123) is arranged at one end of the body (122) far away from the sleeve (11), and a valve port is arranged on the mounting boss (123);

the second pipe fitting (90) is sleeved on the mounting boss (123), a welding ring accommodating part (100) is arranged between the inner wall of the second pipe fitting (90) and the outer side wall of the mounting boss (123), and the welding ring accommodating part (100) is used for placing a welding ring (110).

2. An electronic expansion valve according to claim 1, wherein the weld ring receptacle (100) is provided on the mounting boss (123).

3. An electronic expansion valve according to claim 2, wherein a receiving groove (123a) is provided on an outer side wall of the mounting boss (123), the receiving groove (123a) being annularly provided along a circumferential direction of the mounting boss (123), the receiving groove (123a) forming the weld ring receiving portion (100).

4. An electronic expansion valve according to claim 3, wherein the receiving groove (123a) is located at an end of the mounting boss (123) remote from the body (122).

5. An electronic expansion valve according to claim 1, wherein a flow guiding structure is arranged between the second tube member (90) and the mounting boss (123), the flow guiding structure being adapted for circulating solder.

6. An electronic expansion valve according to claim 5, wherein the inner wall of the second tube member (90) is provided with channels.

7. The electronic expansion valve of claim 1, further comprising:

the first pipe fitting (70), the said body (10) has inlet and outlet holes communicating each other, the said outlet hole is correspondent to the said valve port and set up, the said first pipe fitting (70) is set up in the said inlet hole and partly stretched into the said body (10);

the guide sleeve (20) is arranged in the shell (10), a limiting structure (80) is arranged between the guide sleeve (20) and the first pipe fitting (70), and the limiting structure (80) is used for limiting the length dimension of the first pipe fitting (70) extending into the shell (10).

8. An electronic expansion valve according to claim 7, wherein the guide sleeve (20) is provided with a limit boss (23), and the limit boss (23) is arranged corresponding to the end surface of the first pipe member (70).

9. An electronic expansion valve according to claim 8, wherein the stop boss (23) is annularly arranged along a circumference of the guide sleeve (20).

10. The electronic expansion valve of claim 7, further comprising:

a rotor (40) rotatably disposed within the housing (10);

the screw (50) is arranged in the shell (10), and the rotor (40) is in driving connection with the screw (50);

the valve needle assembly (60) is movably arranged in the shell (10), one end of the screw rod (50) is connected with the valve needle assembly (60) so as to drive the valve needle assembly (60) to axially move through the screw rod (50), and the valve needle assembly (60) is arranged corresponding to the valve port;

the nut assembly (30), be provided with nut direction section (22) on uide bushing (20), nut assembly (30) cover is established on nut direction section (22).