CN217301612U

CN217301612U - Electronic expansion valve

Info

Publication number: CN217301612U
Application number: CN202220406752.8U
Authority: CN
Inventors: 贺宇辰; 刘乐强; 徐冠军
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-08-26
Anticipated expiration: 2032-02-25

Abstract

The utility model provides an electronic expansion valve, include: a valve body assembly including a valve port; a nut seat; the screw rod is movably arranged in the nut seat in a penetrating way and is in threaded connection with the nut seat; the valve head is sleeved at one end of the screw rod, a bearing is arranged between the valve head and the screw rod, and the screw rod drives the valve head to move so as to block or open the valve port; the rotation stopping structure is arranged between the valve body assembly and the valve head, and the rotation stopping structure can limit the valve head to rotate relative to the valve body assembly. By adopting the technical scheme, the problem that the valve head of the electronic expansion valve in the prior art vibrates and generates noise when rotating in the using process is solved.

Description

Electronic expansion valve

Technical Field

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

Background

At present, a nut seat is arranged in a valve shell of an electronic expansion valve, a screw rod is in threaded connection with the valve head in the nut seat, and the screw rod drives the valve head to plug or open the valve port. In the prior art, in order to avoid the mutual friction between the valve head and the side wall of the valve port when the valve head rotates along with the screw rod, a bearing is generally arranged between the screw rod and the valve head, but when the valve port is in an open state and fluid flows in the valve shell, the fluid impacts the valve head to rotate the valve head, so that vibration and noise are generated, and the normal use of the electronic expansion valve is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve to solve the rotatory problem that produces vibrations and noise of electronic expansion valve head among the prior art in the use.

The utility model provides an electronic expansion valve, include: a valve body assembly including a valve port; a nut seat; the screw rod is movably arranged in the nut seat in a penetrating way and is in threaded connection with the nut seat; the valve head is sleeved at one end of the screw rod and can rotate relative to the screw rod, and the screw rod drives the valve head to move so as to plug or open the valve port; the rotation stopping structure is arranged between the valve body assembly and the valve head, and the rotation stopping structure can limit the valve head to rotate relative to the valve body assembly. Set up between valve body and valve head and spline the structure, can prevent that the valve head from rotating under the circumstances such as fluid impact valve head to produce the noise when can avoiding the valve head to rotate.

Use the technical scheme of the utility model, the valve head cover is established in the one end of screw rod, is provided with the bearing between valve head and the screw rod, sets up between valve body and the valve head and ends the structure of changeing, ends the structure of changeing and can restrict the relative valve body rotation of valve head. By adopting the technical scheme, the rotation stopping structure is arranged between the valve body assembly and the valve head, so that the valve head can be prevented from rotating relative to the valve body assembly, the noise generated by the rotation of the valve head can be prevented, and the integral noise of the electronic expansion valve can be further reduced; in addition, set up between valve body subassembly and valve head and spline the structure, can also prevent the valve head when rotatory with parts such as valve body subassembly between the looks mutual friction to can avoid valve head and other parts by wearing and tearing, and then can improve electronic expansion valve's whole life.

Further, the valve body assembly includes: a valve housing; the valve comprises a valve body, wherein the valve body is provided with a first end and a second end which are arranged oppositely, the first end of the valve body is connected with a valve sleeve, the valve sleeve is matched with the valve body to form an accommodating cavity, and a valve port is arranged at the second end of the valve body and is communicated with the accommodating cavity. The valve body assembly is arranged to comprise the valve sleeve and the valve body, so that the nut seat, the screw rod, the valve head and the rotation stopping structure are conveniently assembled in the accommodating cavity, and the installation efficiency is improved.

Furthermore, a threaded hole and a connecting hole which are communicated are formed in the nut seat, the connecting hole is formed in one side, far away from the valve sleeve, of the threaded hole, and the screw rod penetrates through the threaded hole and the connecting hole; the first end of the valve body is provided with an annular bulge, the annular bulge penetrates through the connecting hole, the outer peripheral face of the annular bulge is matched with the connecting hole, and the rotation stopping structure is arranged between the annular bulge and the valve head. The valve head sets up the one end of keeping away from the valve barrel at the screw rod, and the valve head is close to the connecting hole setting of nut seat promptly, and the valve head is close to the protruding setting of annular promptly, consequently, will only change the structure and set up between annular is protruding and the valve head, can make the whole volume of only changing the structure less, and can make only change the structure can not interfere with each other with other spare parts.

Further, the valve head has relative first end and the second end that sets up, and the second end of valve head is close to the valve port setting, and the structure of splines includes first portion of splines and the second portion of splines, and first portion of splines sets up on annular bulge, and the second portion of splines sets up on the first end of valve head, and first portion of splines cooperatees with the second portion of splines to restrict the valve head and rotate. The first end of the valve head is close to the nut seat and the annular bulge, so that the second rotation stopping part is arranged at the first end of the valve head, the first rotation stopping part is arranged on the annular bulge, and the first rotation stopping part and the second rotation stopping part can be simple in structure and small in size.

Further, the first portion of splining is the spacing hole of setting on the annular is protruding, and the second portion of splining is the gag lever post of setting on the first end of valve head, and the gag lever post is worn to establish in spacing downthehole. The gag lever post is worn to establish in spacing downthehole, and the connection stability in gag lever post and spacing hole is better, and the installation is simple and convenient, and can restrict the valve head better and rotate.

Furthermore, the limiting hole is formed in the end face of the annular protrusion and extends in the axial direction, one end of the limiting rod is arranged on the end face of the first end of the valve head, and the other end of the limiting rod penetrates through the limiting hole. The limiting rod and the limiting hole are easy and convenient to machine, and the limiting rod is easy to install in the limiting hole, so that the difficulty of assembling the electronic expansion valve is reduced.

Furthermore, first rotation stopping part is the first rotation stopping face that sets up on the bellied inside wall of annular, and the first end of valve head is worn to establish in the annular arch, and the second rotation stopping part is the second rotation stopping face that sets up on the first end of valve head, and first rotation stopping face and second rotation stopping face laminate mutually in order to restrict the relative valve body rotation of valve head. By adopting the structure, the interaction area of the first rotation stopping surface and the second rotation stopping surface is larger, and the pressure born by the first rotation stopping surface and the second rotation stopping surface is smaller, so that the structural stability and the matching stability of the first rotation stopping part and the second rotation stopping part can be improved, and the overall structural stability and the service life of the electronic expansion valve are further improved.

Further, the second rotation stopping portion comprises a plurality of second rotation stopping faces, the second rotation stopping faces are arranged on the side wall of the first end of the valve head in a surrounding mode, a plurality of rotation stopping grooves are formed in the inner side wall of the annular protrusion at intervals in an annular mode and extend in the axial direction, the side wall of each rotation stopping groove forms a first rotation stopping face, and the second rotation stopping faces and the first rotation stopping faces of the rotation stopping grooves are matched to stop rotation. Optionally, a second annular bulge is arranged on the end face of one end, far away from the valve head body, of the second step section, and a plurality of second rotation stopping surfaces are arranged on the side wall of the second annular bulge in an enclosing manner.

Further, the valve head comprises: the valve head body is provided with a first end and a second end which are arranged oppositely, and the second end of the valve head body is arranged close to the valve port; the pressure cover, the first end fixed connection of pressure cover and valve head body presses and is provided with the through-hole on the cover, and the tip of screw rod is worn to establish by the through-hole in the valve head body, is provided with the bearing between screw rod and the valve head, and the bearing is located the valve head body, and the bearing housing is established on the screw rod, and the one end and the screw rod butt of bearing press the one side of keeping away from the valve port that the cover is located the bearing, press the other end butt of cover and bearing, and the second is only changeed the portion and is set up on pressing the cover. By adopting the structure, the bearing can be conveniently installed inside the valve head body, the two ends of the bearing are respectively abutted against the screw rod and the pressing sleeve, the bearing can be limited, and the bearing is prevented from shifting in the working process of the electronic expansion valve. The pressing sleeve and the valve head body can be fixedly connected through welding and other modes.

Further, press the cover to include along axial interconnect's first step section and second step section, first step section is worn to establish in the first end of valve head body, and the terminal surface looks butt of second step section and the first end of valve head body, and the second portion of splining sets up on second step section. The second step section is connected with the first end looks butt of valve head body, can make the pressure cover better with the connection stability between the valve head body.

Further, the valve body is provided with a first hole section and a second hole section which are sequentially communicated along the axial direction, the diameter of the first hole section is smaller than that of the second hole section, the first hole section is positioned on one side, far away from the valve port, of the second hole section, and the inner side wall of the first hole section is attached to the outer peripheral surface of the first end of the valve head. The first hole section is attached to the outer peripheral face of the first end of the valve head, when the screw drives the valve head to be far away from or block the valve port, the inner side wall of the first hole section can guide the valve head, so that the coaxiality between the valve head and the valve port can be ensured, and the precision of the electronic expansion valve can be improved.

Further, the valve body assembly still includes the uide bushing, and the uide bushing setting is holding the intracavity, and the valve head is worn to establish in the uide bushing, and the uide bushing is used for the valve head direction, and the structure setting of splining is between uide bushing and valve head. The rotation stopping structure is arranged on the valve head and the guide sleeve, so that the rotation stopping structure is convenient to design, the structural size of the rotation stopping structure is small, and the space occupied by the rotation stopping structure is reduced.

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 schematic structural diagram of a valve body according to a first embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a valve head according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electronic expansion valve according to a second embodiment of the present invention;

fig. 5 shows a schematic structural diagram of a valve body provided in the second embodiment of the present invention;

fig. 6 shows a schematic structural diagram of a valve head provided in the second embodiment of the present invention;

fig. 7 shows a schematic structural diagram of the pressing sleeve provided by the second embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a valve housing; 20. a valve body; 21. a first end of the valve body; 211. an annular projection; 22. a second end of the valve body; 23. a first bore section; 24. a second bore section; 25. a valve body; 30. an accommodating chamber; 40. a valve seat; 41. a valve port; 50. a nut seat; 51. a threaded hole; 52. connecting holes; 60. a screw; 70. a valve head; 71. a first end of the valve head; 72. a second end of the valve head; 73. a valve head body; 731. a first end of the valve head body; 732. a second end of the valve head body; 74. pressing a sleeve; 741. a first step section; 742. a second step section; 7421. a second annular boss; 743. a through hole; 80. a rotation stopping structure; 81. a limiting hole; 82. a limiting rod; 83. a first rotation stop surface; 84. a second rotation stop surface; 85. a rotation stopping groove; 90. and a bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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 fig. 3, an embodiment of the present invention provides an electronic expansion valve, which includes a valve body assembly, a nut seat 50, a screw rod 60, a valve head 70, and a rotation stopping structure 80. A valve body assembly having a receiving chamber 30 and a valve port 41, the valve port 41 communicating with the receiving chamber 30; a nut seat 50 disposed in the accommodation chamber 30; the screw rod 60 is movably arranged in the nut seat 50 in a penetrating way and is in threaded connection with the nut seat 50; the valve head 70 is sleeved at one end of the screw rod 60, the screw rod 60 can rotate relative to the valve head 70, and the screw rod 60 drives the valve head 70 to move so as to block or open the valve port 41; the rotation stop structure 80 is disposed between the valve body assembly and the valve head 70, and the rotation stop structure 80 can limit the valve head 70 to rotate relative to the valve body assembly. The screw rod 60 is in threaded connection with the nut seat 50, and when the screw rod 60 rotates, the screw rod 60 moves linearly along the axis of the nut seat 50, so that the screw rod 60 drives the valve head 70 to close or open the valve port 41. The bearing 90 is arranged between the valve head 70 and the screw rod 60, so that when the valve head 70 is contacted with the valve port 41, the valve head 70 does not rotate along with the screw rod 60, thereby preventing the mutual abrasion between the valve head 70 and the valve port 41 when the valve head 70 is contacted with the valve port 41, and prolonging the service life of the electronic expansion valve. The rotation stop structure 80 is provided between the valve body assembly and the valve head 70, so that the valve head 70 can be prevented from rotating when fluid impacts the valve head 70, and the like, and noise can be avoided when the valve head 70 rotates. Alternatively, the anti-rotation structure 80 may be disposed between the inner sidewall of the valve body assembly and the sidewall of the valve head 70, such as providing a third anti-rotation surface on the inner sidewall of the valve body 20 and a fourth anti-rotation surface on the outer sidewall of the valve head 70, the fourth anti-rotation surface cooperating with the third anti-rotation surface to limit the rotation of the valve head 70.

Use the technical scheme of the utility model, the one end at screw rod 60 is established at valve head 70 cover, is provided with bearing 90 between valve head 70 and the screw rod 60, sets up the structure of splining between valve body 20 and valve head 70, and the structure of splining can restrict the relative valve body 20 rotation of valve head 70. By adopting the technical scheme, the rotation stopping structure is arranged between the valve body assembly and the valve head 70, so that the valve head 70 can be prevented from rotating relative to the valve body assembly, the noise generated by the rotation of the valve head 70 can be prevented, and the integral noise of the electronic expansion valve can be reduced; in addition, the rotation stopping structure is arranged between the valve body assembly and the valve head 70, mutual friction between the valve head 70 and parts such as the valve body assembly can be prevented when the valve head 70 rotates, and therefore the valve head 70 and other parts can be prevented from being abraded, and the whole service life of the electronic expansion valve can be prolonged.

Specifically, the valve body assembly includes a valve housing 10 and a valve body 20. The valve body 20 has a first end and a second end disposed opposite to each other, the first end 21 of the valve body is connected to the valve housing 10, the valve housing 10 and the valve body 20 cooperate to form the receiving chamber 30, and the valve port 41 is disposed at the second end 22 of the valve body. The valve body assembly is provided to include the valve housing 10 and the valve body 20, so that the assembly of the nut holder 50, the screw 60, the valve head 70 and the rotation stopping structure 80 in the accommodating chamber 30 is facilitated, and the installation efficiency is improved. Alternatively, the valve body 20 includes a valve body 25 and a valve seat 40, the valve body 25 and the valve seat 40 can be integrally formed or separately disposed, the valve port 41 is disposed on the valve seat 40, and the valve body 25 is disposed between the valve seat 40 and the valve housing 10.

In the embodiment, the nut seat 50 is provided with a threaded hole 51 and a connecting hole 52 which are communicated, the connecting hole 52 is arranged on one side of the threaded hole 51 far away from the valve sleeve 10, and the screw 60 is arranged in the threaded hole 51 and the connecting hole 52 in a penetrating way; the first end 21 of the valve body is provided with an annular protrusion 211, the annular protrusion 211 is arranged in the connecting hole 52 in a penetrating mode, the outer peripheral surface of the annular protrusion 211 is matched with the connecting hole 52, and the rotation stopping structure 80 is arranged between the annular protrusion 211 and the valve head 70. The annular protrusion 211 is inserted into the connection hole 52, so that the connection stability of the nut seat 50 and the valve body 20 can be improved, the coaxiality among the nut seat 50, the valve body 20, the valve seat 40 and the valve port 41 can be improved, and the coaxiality among the screw 60, the valve head 70 and the valve port 41 can be improved. In the above technical solution, the valve head 70 is disposed at one end of the screw rod 60 far away from the valve housing 10, that is, the valve head 70 is disposed close to the connecting hole 52 of the nut seat 50, that is, the valve head 70 is disposed close to the annular protrusion 211, therefore, the rotation stopping structure 80 is disposed between the annular protrusion 211 and the valve head 70, the overall volume of the rotation stopping structure 80 can be made smaller, and the rotation stopping structure 80 can be prevented from interfering with other components.

Specifically, the valve head 70 has a first end and a second end disposed opposite to each other, the second end 72 of the valve head is disposed close to the valve port 41, the rotation stopping structure 80 includes a first rotation stopping portion and a second rotation stopping portion, the first rotation stopping portion is disposed on the annular protrusion 211, the second rotation stopping portion is disposed on the first end 71 of the valve head, and the first rotation stopping portion and the second rotation stopping portion cooperate to limit the rotation of the valve head 70. In the above configuration, the first end 71 of the valve head is provided close to the nut holder 50 and the annular protrusion 211, and thus the second rotation stop portion is provided at the first end 71 of the valve head and the first rotation stop portion is provided at the annular protrusion 211, which makes it possible to simplify the structure of the first rotation stop portion and the second rotation stop portion and to reduce the volume.

As shown in fig. 2 and 3, the first rotation-stopping portion is a limiting hole 81 disposed on the annular protrusion 211, the second rotation-stopping portion is a limiting rod 82 disposed on the first end 71 of the valve head, and the limiting rod 82 penetrates through the limiting hole 81. The limiting rod 82 penetrates through the limiting hole 81, the connection stability of the limiting rod 82 and the limiting hole 81 is good, the installation is simple and convenient, and the valve head 70 can be well limited to rotate. Optionally, the outer peripheral surface of the stopper rod 82 is fitted to the inner side wall of the stopper hole 81 to prevent the valve head 70 from shaking, thereby enabling noise to be reduced to a greater extent.

Specifically, the limiting hole 81 is disposed on the end surface of the annular protrusion 211, the limiting hole 81 extends in the axial direction, one end of the limiting rod 82 is disposed on the end surface of the first end 71 of the valve head, and the other end of the limiting rod 82 penetrates through the limiting hole 81. So set up, the processing of gag lever post 82 and spacing hole 81 is simple and convenient, and gag lever post 82 is easily installed in spacing hole 81 to the degree of difficulty of equipment electronic expansion valve has been reduced.

Specifically, the valve head 70 includes a valve head body 73 and a pressing sleeve 74. Valve head body 73 has first and second oppositely disposed ends, with second end 732 of valve head body disposed adjacent valve port 41; the pressing sleeve 74 is fixedly connected with the first end 731 of the valve head body, the pressing sleeve 74 is provided with a through hole 743, the end portion of the screw rod 60 is arranged in the valve head body 73 in a penetrating manner through the through hole 743, the bearing 90 is arranged in the valve head body 73, the bearing 90 is sleeved on the screw rod 60, the bearing 90 is arranged between the valve head 70 and the screw rod 60, one end of the bearing 90 is abutted against the screw rod 60, the pressing sleeve 74 is arranged on one side, away from the valve port 41, of the bearing 90, the pressing sleeve 74 is abutted against the other end of the bearing 90, and the second rotation stopping portion is arranged on the pressing sleeve 74. By adopting the structure, the bearing 90 can be conveniently installed inside the valve head body 73, the two ends of the bearing 90 are respectively abutted against the screw 60 and the pressing sleeve 74, the bearing 90 can be limited, and the bearing 90 is prevented from shifting in the working process of the electronic expansion valve. The pressing sleeve 74 and the valve head body 73 can be fixedly connected by welding and the like.

Specifically, the pressing sleeve 74 includes a first step section 741 and a second step section 742 that are connected to each other in the axial direction, the first step section 741 is inserted into the first end 731 of the valve head body, the second step section 742 abuts against an end surface of the first end 731 of the valve head body, and the second rotation stopper is disposed on the second step section 742. The second step section 742 abuts against the first end 731 of the valve head body, and therefore, the connection between the pressure sleeve 74 and the valve head body 73 can be more stable. A second rotation stopper may be provided on an end surface of second step section 742 at an end remote from valve head body 73. The end surface area of the second step section 742, which is far away from the end of the valve head body 73, is large, and an installation space is provided for the second rotation stopping part, so that the second rotation stopping part is arranged on the second step section 742, and the second rotation stopping part can be prevented from interfering with other parts.

Specifically, the valve body 20 has a first hole section 23 and a second hole section 24 that are sequentially communicated in the axial direction, the diameter of the first hole section 23 is smaller than that of the second hole section 24, the first hole section 23 is located on the side of the second hole section 24 away from the valve port 41, and the inner side wall of the first hole section 23 is attached to the outer peripheral surface of the first end 71 of the valve head. The first hole section 23 is attached to the outer peripheral surface of the first end 71 of the valve head, and when the screw 60 drives the valve head 70 to be far away from or close the valve port 41, the inner side wall of the first hole section 23 can guide the valve head 70, so that the coaxiality between the valve head 70 and the valve port 41 can be ensured, and the precision of the electronic expansion valve can be improved.

As shown in fig. 4 to 7, a second embodiment of the present invention provides an electronic expansion valve, which is different from the first embodiment in that the first rotation stopping portion is a first rotation stopping surface 83 disposed on the inner sidewall of the annular protrusion 211, the first end 71 of the valve head is disposed in the annular protrusion 211, the second rotation stopping portion is a second rotation stopping surface 84 disposed on the first end 71 of the valve head, and the first rotation stopping surface 83 is attached to the second rotation stopping surface 84 to limit the rotation of the valve head 70 relative to the valve body 20. By adopting the structure, the interaction area of the first rotation stopping surface 83 and the second rotation stopping surface 84 is larger, and the pressure born by the first rotation stopping surface 83 and the second rotation stopping surface 84 is smaller, so that the structural stability and the matching stability of the first rotation stopping part and the second rotation stopping part can be improved, and the overall structural stability and the service life of the electronic expansion valve are further improved. Optionally, a second anti-rotation surface 84 is provided on the press sleeve 74.

Specifically, the second rotation stopping portion includes a plurality of second rotation stopping surfaces 84, the plurality of second rotation stopping surfaces 84 are arranged around the side wall of the first end 71 of the valve head, a plurality of rotation stopping grooves 85 are arranged on the inner side wall of the annular protrusion 211 at intervals in an annular manner, the rotation stopping grooves 85 extend in the axial direction, the side wall of the rotation stopping grooves 85 forms a first rotation stopping surface 83, and the plurality of second rotation stopping surfaces 84 are matched with the first rotation stopping surface 83 of the rotation stopping grooves 85 to stop rotation. Optionally, one or more rotation stopping grooves 85 are formed in the inner side wall of the annular protrusion 211, the joint of the adjacent second rotation stopping surfaces 84 is clamped in the rotation stopping groove 85, and the second rotation stopping surfaces 84 are attached to the side wall of the rotation stopping groove 85 to stop the rotation of the valve head 70. Optionally, a second annular protrusion 7421 is disposed on an end surface of the second step section 742 at an end far away from the valve head body 73, and a plurality of second rotation stop surfaces 84 are enclosed on a side wall of the second annular protrusion 7421.

The embodiment of the utility model provides a third provides an electronic expansion valve, with embodiment one's difference lies in, the valve body subassembly still includes the uide bushing, and the uide bushing setting is in holding chamber 30, and in the uide bushing was worn to establish by valve head 70, the uide bushing was used for the direction to valve head 70, and structure 80 that splines sets up between uide bushing and valve head 70. The rotation stopping structure 80 is arranged on the valve head 70 and the guide sleeve, so that the rotation stopping structure 80 is convenient to design, the structural size of the rotation stopping structure 80 can be smaller, and the space occupied by the rotation stopping structure 80 is reduced. In addition, the rotation stopping structure 80 is arranged between the guide sleeve and the valve head 70, so that the processing and the assembly of the rotation stopping structure 80 are facilitated, and the processing and the installation efficiency are improved.

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 exemplary only and not as 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, it need not be discussed further 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 valve body assembly having a receiving chamber (30) and a valve port (41), the valve port (41) communicating with the receiving chamber (30);

a nut seat (50), said nut seat (50) being arranged inside said housing chamber (30);

the screw rod (60) is movably arranged in the nut seat (50) in a penetrating mode, and is in threaded connection with the nut seat (50);

the valve head (70) is sleeved at one end of the screw rod (60), the screw rod (60) can rotate relative to the valve head (70), and the screw rod (60) drives the valve head (70) to move so as to block or open the valve port (41);

the rotation stopping structure (80) is arranged between the valve body assembly and the valve head (70), and the rotation stopping structure (80) can limit the valve head (70) to rotate relative to the valve body assembly.

2. The electronic expansion valve of claim 1, wherein the valve body assembly comprises:

a valve housing (10);

a valve body (20), the valve body (20) having a first end and a second end disposed opposite to each other, the first end (21) of the valve body being connected to the valve housing (10), the valve housing (10) and the valve body (20) cooperating to form the receiving chamber (30), the valve port (41) being disposed at the second end (22) of the valve body.

3. The electronic expansion valve of claim 2,

the nut seat (50) is provided with a threaded hole (51) and a connecting hole (52) which are communicated, the connecting hole (52) is arranged on one side of the threaded hole (51) far away from the valve sleeve (10), and the screw rod (60) penetrates through the threaded hole (51) and the connecting hole (52);

be provided with annular bulge (211) on first end (21) of valve body, annular bulge (211) wear to establish in connecting hole (52), the outer peripheral face of annular bulge (211) with connecting hole (52) looks adaptation, rotation stopping structure (80) set up annular bulge (211) with between valve head (70).

4. An electronic expansion valve according to claim 3, wherein the valve head (70) has a first end and a second end arranged oppositely, the second end (72) of the valve head is arranged adjacent to the valve port (41), the rotation stop structure (80) comprises a first rotation stop portion arranged on the annular protrusion (211) and a second rotation stop portion arranged on the first end (71) of the valve head, the first rotation stop portion and the second rotation stop portion cooperate to limit the rotation of the valve head (70).

5. An electronic expansion valve according to claim 4, wherein the first rotation-stopping portion is a limiting hole (81) provided on the annular protrusion (211), and the second rotation-stopping portion is a limiting rod (82) provided on the first end (71) of the valve head, the limiting rod (82) being inserted into the limiting hole (81).

6. An electronic expansion valve according to claim 5, wherein the limiting hole (81) is provided in an end face of the annular protrusion (211), and the limiting hole (81) extends in an axial direction, one end of the limiting rod (82) is provided in an end face of the first end (71) of the valve head, and the other end of the limiting rod (82) is inserted into the limiting hole (81).

7. The electronic expansion valve according to claim 4, wherein the first rotation stop portion is a first rotation stop surface (83) disposed on an inner side wall of the annular protrusion (211), the first end (71) of the valve head is disposed through the annular protrusion (211), the second rotation stop portion is a second rotation stop surface (84) disposed on the first end (71) of the valve head, and the first rotation stop surface (83) and the second rotation stop surface (84) are engaged to limit the rotation of the valve head (70) relative to the valve body (20).

8. An electronic expansion valve according to claim 7, wherein the second rotation stop portion comprises a plurality of second rotation stop surfaces (84), the plurality of second rotation stop surfaces (84) are arranged around a side wall of the first end (71) of the valve head, a plurality of rotation stop grooves (85) are annularly arranged on an inner side wall of the annular protrusion (211) at intervals, the rotation stop grooves (85) extend along an axial direction, a side wall of the rotation stop grooves (85) forms the first rotation stop surface (83), and the plurality of second rotation stop surfaces (84) are matched with the first rotation stop surfaces (83) of the rotation stop grooves (85) for rotation stop.

9. Electronic expansion valve according to any of claims 4-8, wherein the valve head (70) comprises:

a valve head body (73), the valve head body (73) having a first end and a second end disposed opposite, the second end (732) of the valve head body being disposed proximate to the valve port (41);

the pressure sleeve (74) is fixedly connected with the first end (731) of the valve head body, a through hole (743) is formed in the pressure sleeve (74), the end portion of the screw rod (60) penetrates through the valve head body (73) through the through hole (743), a bearing (90) is arranged between the valve head (70) and the screw rod (60), the bearing (90) is located in the valve head body (73), the bearing (90) is sleeved on the screw rod (60), one end of the bearing (90) is abutted to the screw rod (60), the pressure sleeve (74) is located on one side, away from the valve port (41), of the bearing (90), the pressure sleeve (74) is abutted to the other end of the bearing (90), and the second rotation stopping portion is arranged on the pressure sleeve (74).

10. An electronic expansion valve according to claim 9, wherein the pressure sleeve (74) comprises a first step section (741) and a second step section (742) which are axially connected to each other, the first step section (741) being disposed through the first end (731) of the valve head body, the second step section (742) being in abutment with an end face of the first end (731) of the valve head body, and the second rotation stop being provided on the second step section (742).

11. An electronic expansion valve according to claim 4, wherein the valve body (20) has a first bore section (23) and a second bore section (24) which are sequentially communicated in the axial direction, the diameter of the first bore section (23) is smaller than that of the second bore section (24), the first bore section (23) is located on the side of the second bore section (24) away from the valve port (41), and the inner side wall of the first bore section (23) is in contact with the outer peripheral surface of the first end (71) of the valve head.

12. The electronic expansion valve according to claim 1, wherein the valve body assembly further comprises a guide sleeve, the guide sleeve is disposed in the accommodating chamber (30), the valve head (70) is disposed in the guide sleeve in a penetrating manner, the guide sleeve is used for guiding the valve head (70), and the rotation stopping structure (80) is disposed between the guide sleeve and the valve head (70).