CN113028072A

CN113028072A - Electronic expansion valve

Info

Publication number: CN113028072A
Application number: CN201911360786.7A
Authority: CN
Inventors: 袁波锋; 康志军
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2021-06-25

Abstract

The invention provides an electronic expansion valve, comprising: a housing; a rotor assembly rotatably disposed within the housing; the nut component is fixedly arranged in the shell; the stop piece is sleeved on the nut component and can spirally move along the nut component relative to the nut component; the detection assembly comprises a magnetic part and a sensor, the magnetic part is rotatably arranged in the shell, and the sensor is used for detecting the motion state of the magnetic part so as to detect the working state of the rotor assembly; the guide piece is arranged on the rotor assembly, one end of the guide piece is in driving connection with the stop piece so as to stop the rotor assembly, and the other end of the guide piece is in driving connection with the magnetic piece. Through the technical scheme provided by the application, the problem of complex structure in the prior art can be solved.

Description

Electronic expansion valve

Technical Field

The invention relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve.

Background

At present, electronic expansion valve includes casing, rotor subassembly, magnetic part and angle sensor, and rotor subassembly and magnetic part all rotationally set up in the casing, and angle sensor sets up in the casing outside, and angle sensor is located the magnetic part top. Wherein, magnetic part and rotor subassembly synchronous rotation, angle sensor is through the turned angle who detects magnetic part to judge the operating condition of rotor subassembly.

In prior art, be provided with the connecting piece alone between rotor subassembly and the magnetic part, the one end and the rotor subassembly of connecting piece are connected, and the other end and the magnetic part of connecting piece are connected, and the magnetic part passes through the connecting piece and rotates with the rotor subassembly is synchronous, and its spare part is more, and the structure is complicated. Therefore, the prior art has a problem of complicated structure.

Disclosure of Invention

The invention provides an electronic expansion valve, which aims to solve the problem of complex structure in the prior art.

The invention provides an electronic expansion valve, which comprises: a housing; a rotor assembly rotatably disposed within the housing; the nut component is fixedly arranged in the shell; the stop piece is sleeved on the nut component and can spirally move along the nut component relative to the nut component; the detection assembly comprises a magnetic part and a sensor, the magnetic part is rotatably arranged in the shell, and the sensor is used for detecting the motion state of the magnetic part so as to detect the working state of the rotor assembly; the guide piece is arranged on the rotor assembly, one end of the guide piece is in driving connection with the stop piece so as to stop the rotor assembly, and the other end of the guide piece is in driving connection with the magnetic piece.

Furthermore, a connecting structure is arranged between the guide piece and the magnetic piece, and the guide piece is in driving connection with the magnetic piece through the connecting structure.

Further, the guide part comprises a main body and a driving rod, the main body is arranged on the rotor assembly, the driving rod is arranged on the main body, the main body is used for stopping the rotor assembly, and the driving rod is in driving connection with the magnetic part.

Further, the magnetic part is provided with a slot, the slot extends along the axial direction of the magnetic part, and the driving rod is inserted in the slot to form a connecting structure.

Furthermore, a plurality of slots are formed in the magnetic part at intervals, a plurality of driving rods are arranged on the main body, and the plurality of driving rods and the plurality of slots are arranged in a one-to-one correspondence mode.

Furthermore, one end of the magnetic part is provided with a first installation convex part, a first installation hole is formed in the first installation convex part, the first installation hole and the magnetic part are coaxially arranged, a second installation convex part is arranged on the shell, and the second installation convex part is arranged in the first installation hole in a penetrating mode.

Furthermore, the electronic expansion valve further comprises a supporting spring, a second mounting hole is formed in the other end of the magnetic part, a third mounting convex portion is arranged on the bottom wall of the second mounting hole, one end of the supporting spring is sleeved on the third mounting convex portion, and the other end of the supporting spring is connected with the rotor assembly.

Further, the hole wall of the first mounting hole and/or the outer wall of the second mounting convex portion are/is provided with a wear-resistant coating.

Further, the main body includes a connecting plate and a stop bar connected to each other, the connecting plate being connected to the rotor assembly, the stop bar extending toward one side of the connecting plate, the drive rod extending toward the other side of the connecting plate, the stop bar being for stopping the rotor assembly.

Further, the rotor assembly comprises a magnetic core and a rotor plate, the rotor plate is fixedly arranged in the magnetic core, the rotor plate is provided with a fourth mounting convex portion, the connecting plate is sleeved on the fourth mounting convex portion, and the stop rod penetrates through the rotor plate and extends towards the direction far away from the magnetic part.

By applying the technical scheme of the invention, the electronic expansion valve comprises a shell, a rotor assembly, a nut assembly, a stop member, a detection assembly and a guide member, wherein the rotor assembly is rotatably arranged in the shell, the nut assembly is fixedly arranged in the shell, the stop member is sleeved on the nut assembly, and the guide member is arranged on the rotor assembly. Wherein, the relative nut component spiral removal of nut component can be followed to the stop piece, through the one end with leading the piece with the stop piece drive connection, can utilize to lead the piece and carry out the backstop to the rotor subassembly. Specifically, through the other end and the magnetic part drive connection with leading the piece, because leading the piece setting on the rotor subassembly, leading the piece and can driving magnetic part and rotor subassembly synchronous rotation, then utilize the sensor to detect the motion state of magnetic part, can detect the operating condition of rotor subassembly. By adopting the structure, a connecting piece does not need to be arranged independently, the guide piece can be utilized to realize the synchronous rotation of the stop piece of the rotor component and the magnetic piece simultaneously, the number of parts can be reduced, and the structure of the device can be simplified.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, 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 provided according to an embodiment of the present invention;

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

FIG. 3 is a schematic view of the guide of FIG. 1;

FIG. 4 shows a schematic structural view of the magnetic member of FIG. 1;

FIG. 5 shows a top view of the magnetic member of FIG. 1;

fig. 6 shows a cross-sectional view at B-B in fig. 5.

Wherein the figures include the following reference numerals:

10. a housing; 11. a second mounting boss; 20. a rotor assembly; 21. a magnetic core; 22. a rotor plate; 221. a fourth mounting boss; 30. a nut seat; 40. a limiting spring;

50. a detection component; 51. a magnetic member; 511. a slot; 512. a first mounting boss; 513. a first mounting hole; 514. a second mounting hole; 515. a third mounting boss; 52. a sensor;

60. a guide member; 61. a main body; 611. a connecting plate; 612. a stop bar; 62. a drive rod;

70. a connecting structure; 80. a support spring; 90. a screw; 100. a valve needle assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 6, an embodiment of the present invention provides an electronic expansion valve, which includes a housing 10, a rotor assembly 20, a nut assembly, a stopper, a detection assembly 50, and a guide 60. Wherein, the detecting assembly 50 includes a magnetic member 51 and a sensor 52, the magnetic member 51 is rotatably disposed in the housing 10, and the sensor 52 is used for detecting the moving state of the magnetic member 51. The nut assembly comprises a nut seat 30 and a limiting spring 40, the nut seat 30 is fixedly arranged in the shell 10, the limiting spring 40 is sleeved on the nut seat 30, a stop piece is sleeved on the nut seat 30, the stop piece can spirally move relative to the nut seat 30 along the limiting spring 40, and the stop piece is used for being matched with the guide piece 60 to stop the rotor assembly 20. Specifically, the driving member 60 is fixedly disposed on the rotor assembly 20, and by driving and connecting one end of the driving member 60 with the stopper member, the driving member 60 drives the stopper member to spirally move along the limiting spring 40 relative to the nut seat 30, and when the stopper member abuts against a limiting portion disposed in the housing, the stopper member cooperates with the driving member 60 to stop the rotor assembly 20. In the present embodiment, the rotor assembly 20 is rotatably disposed in the housing 10, and since the guiding element 60 is fixedly disposed on the rotor assembly 20, the guiding element 60 drives the magnetic element 51 to rotate along with the rotor assembly 20 by driving and connecting the other end of the guiding element 60 with the magnetic element 51. Specifically, the magnetic member 51 can only rotate relative to the housing 10, but the axial position of the magnetic member 51 in the housing 10 remains unchanged, and the sensor 52 is used to detect the movement state of the magnetic member 51, i.e., the operating state of the rotor assembly 20.

By applying the electronic expansion valve provided by the embodiment, the guiding member 60 is fixedly arranged on the rotor assembly 20, one end of the guiding member 60 is in driving connection with the stop member, the stop member is matched with the guiding member 60 to stop the rotor assembly 20, the other end of the guiding member 60 is in driving connection with the magnetic member 51, the guiding member 60 drives the magnetic member 51 to rotate along with the rotor assembly 20, the working state of the rotor assembly 20 can be detected by using the sensor 52, so that a connecting member does not need to be arranged separately, the stop of the rotor assembly 20 and the synchronous rotation of the magnetic member 51 can be realized simultaneously by using one part of the guiding member 60, the number of parts can be reduced, the structure of the device is simplified, and the production cost is reduced.

In the present embodiment, a connecting structure 70 is disposed between the guiding member 60 and the magnetic member 51, and the guiding member 60 is drivingly connected to the magnetic member 51 through the connecting structure 70. Wherein, the connecting structure 70 includes a connecting rod structure, a telescopic rod structure, an inserting structure, and the like.

Specifically, by providing a plurality of mutually hinged connecting rods, the end of the connecting rod at the head end is hinged to the guide member 60, and the end of the connecting rod at the tail end is hinged to the magnetic member 51, so that the rotor assembly 20 can be ensured to drive the magnetic member 51 to rotate by using the connecting structure 70, and the rotor assembly 20 can be ensured to move relative to the magnetic member 51 in the axial direction.

Similarly, the telescopic rod structure is similar to the connecting rod structure, and by arranging a plurality of rod bodies which are sleeved with each other, the rod body at the head end is connected with the guide piece 60, and the rod body at the tail end is connected with the magnetic piece 51, so that the rotor assembly 20 can be ensured to drive the magnetic piece 51 to rotate by utilizing the connecting structure 70, and the rotor assembly 20 can be ensured to move relative to the magnetic piece 51 in the axial direction.

As shown in fig. 3, the guide member 60 includes a main body 61 and a driving rod 62, the main body 61 is fixedly disposed on the rotor assembly 20, the driving rod 62 is fixedly disposed on the main body 61, the main body 61 is used for cooperating with the stopper to stop the rotor assembly 20, and the driving rod 62 is drivingly connected to the magnetic member 51.

As shown in fig. 4 to 6, the magnetic member 51 is provided with a slot 511, the slot 511 extends along an axial direction of the magnetic member 51, and the driving rod 62 is inserted in the slot 511 to form the connection structure 70. In this embodiment, the slot 511 penetrates through the upper and lower end surfaces of the magnetic member 51, the driving rod 62 is inserted into the slot 511, and the driving rod 62 can move in the slot 511 along the axial direction of the magnetic member 51, so that the driving rod 62 can drive the magnetic member 51 and the rotor assembly 20 to rotate synchronously, and can ensure that the rotor assembly 20 and the magnetic member 51 can move relatively in the axial direction.

In order to further improve the connection stability, a plurality of slots 511 are arranged on the magnetic member 51 at intervals, a plurality of driving rods 62 are arranged on the main body 61, and the plurality of driving rods 62 are arranged in one-to-one correspondence with the plurality of slots 511. In this embodiment, two slots 511 are disposed on the magnetic member 51 at intervals, the two slots 511 are respectively located at two sides of the magnetic member 51, and two driving rods 62 disposed on the main body 61 respectively penetrate through the two slots 511.

As shown in fig. 4, one end of the magnetic member 51 is provided with a first mounting protrusion 512, the first mounting protrusion 512 is disposed to protrude from the upper end surface of the magnetic member 51, a first mounting hole 513 is disposed in the first mounting protrusion 512, and the first mounting hole 513 is disposed coaxially with the magnetic member 51. By providing the second mounting protrusion 11 on the housing 10 and inserting the second mounting protrusion 11 into the first mounting hole 513, the magnetic material 51 can be rotated about the second mounting protrusion 11.

In this embodiment, the electronic expansion valve further includes a supporting spring 80, the other end of the magnetic member 51 is provided with a second mounting hole 514, and the second mounting hole 514 is a counter bore. By providing the third mounting protrusion 515 on the bottom wall of the second mounting hole 514, one end of the supporting spring 80 is sleeved on the third mounting protrusion 515, and the other end of the supporting spring 80 is connected to the rotor assembly 20, i.e., the supporting spring 80 can be used to support the magnetic member 51, so as to prevent the magnetic member 51 from falling off from the third mounting protrusion 515. In other embodiments, by providing a rolling member such as a bearing between the first mounting hole 513 and the second mounting protrusion 11 of the housing 10, the magnetic member 51 can be fixed by the bearing, and a structure such as the support spring 80 is not required, which can further simplify the structure of the apparatus.

Because the magnetic member 51 is opposite to the second mounting protrusion 11 of the housing 10, a wear-resistant coating may be disposed on the hole wall of the first mounting hole 513 and/or the outer wall of the second mounting protrusion 11, so as to reduce friction, reduce wear, reduce friction noise, and prolong the service life. In this embodiment, a wear-resistant coating is disposed on the wall of the first mounting hole 513. In other embodiments, a wear-resistant coating may be provided on the outer wall of the second mounting protrusion 11, or on both the hole wall of the first mounting hole 513 and the outer wall of the second mounting protrusion 11. Wherein the wear resistant coating includes, but is not limited to, polytetrafluoroethylene.

Specifically, the main body 61 includes a connecting plate 611 and a stop rod 612 connected to each other, the connecting plate 611 is connected to the rotor assembly 20, the stop rod 612 extends toward one side of the connecting plate 611, the driving rod 62 extends toward the other side of the connecting plate 611, and the stop rod 612 is used for stopping the rotor assembly 20 in cooperation with the stop.

In the present embodiment, the rotor assembly 20 includes a magnetic core 21 and a rotor plate 22, the rotor plate 22 is fixedly disposed in the magnetic core 21, and the rotor plate 22 is perpendicular to the axial direction of the rotor assembly 20. Specifically, the rotor plate 22 has a fourth mounting convex portion 221, the connecting plate 611 has an opening structure, the connecting plate 611 is sleeved on the fourth mounting convex portion 221 through the opening structure, and the stop rod 612 passes through the rotor plate 22 and extends in a direction away from the magnetic member 51.

In this embodiment, the electronic expansion valve further includes a screw 90 and a valve needle assembly 100, the screw 90 is movably disposed in the nut seat 30, the rotor assembly 20 is drivingly connected to one end of the screw 90, the valve needle assembly 100 is disposed at the other end of the screw 90, and the rotor assembly 20 drives the screw 90 to move along the axial direction, so as to open or close the valve port by the valve needle assembly 100.

In the present embodiment, the magnetic member 51 is a permanent magnet, so that the service life of the device can be prolonged, the sensor 52 is a hall sensor, and the sensor 52 is disposed on the outer side wall of the housing 10.

Through the device that this embodiment provided, guide 60 is the only shelves pole when rotor subassembly 20 stops, is the actuating lever of drive magnetic part 51 again, has got rid of unnecessary part, can simplify the structure of device, and is provided with wear-resisting coating between magnetic part 51 and the second installation convex part 11, can reduce the resistance, can promote the life and the performance of device.

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.

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 unless specifically stated otherwise. 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 is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, 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 simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered 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 the terms have no special meanings unless otherwise stated, 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);

a rotor assembly (20) rotatably disposed within the housing (10);

the nut component is fixedly arranged in the shell (10);

the stop piece is sleeved on the nut component and can spirally move along the nut component relative to the nut component;

the detection assembly (50) comprises a magnetic part (51) and a sensor (52), the magnetic part (51) is rotatably arranged in the shell (10), and the sensor (52) is used for detecting the motion state of the magnetic part (51) so as to detect the working state of the rotor assembly (20);

the guide piece (60) is arranged on the rotor assembly (20), one end of the guide piece (60) is in driving connection with the stop piece so as to stop the rotor assembly (20), and the other end of the guide piece (60) is in driving connection with the magnetic piece (51).

2. An electronic expansion valve according to claim 1, wherein a connecting structure (70) is arranged between the guide member (60) and the magnetic member (51), and the guide member (60) is drivingly connected to the magnetic member (51) via the connecting structure (70).

3. An electronic expansion valve according to claim 2, wherein the guide member (60) comprises a main body (61) and a driving rod (62), the main body (61) is disposed on the rotor assembly (20), the driving rod (62) is disposed on the main body (61), the main body (61) is used for stopping the rotor assembly (20), and the driving rod (62) is drivingly connected with the magnetic member (51).

4. An electronic expansion valve according to claim 3, wherein the magnetic member (51) is provided with a slot (511), the slot (511) extending in an axial direction of the magnetic member (51), the drive rod (62) being inserted in the slot (511) to form the connecting structure (70).

5. The electronic expansion valve according to claim 4, wherein the magnetic member (51) is provided with a plurality of slots (511) at intervals, the main body (61) is provided with a plurality of driving rods (62), and the plurality of driving rods (62) are arranged in one-to-one correspondence with the plurality of slots (511).

6. An electronic expansion valve according to claim 1, wherein one end of the magnetic member (51) is provided with a first mounting protrusion (512), a first mounting hole (513) is provided in the first mounting protrusion (512), the first mounting hole (513) is coaxially arranged with the magnetic member (51), a second mounting protrusion (11) is provided on the housing (10), and the second mounting protrusion (11) is inserted into the first mounting hole (513).

7. The electronic expansion valve according to claim 6, further comprising a support spring (80), wherein a second mounting hole (514) is formed at the other end of the magnetic member (51), a third mounting protrusion (515) is formed on the bottom wall of the second mounting hole (514), one end of the support spring (80) is sleeved on the third mounting protrusion (515), and the other end of the support spring (80) is connected to the rotor assembly (20).

8. An electronic expansion valve according to claim 6, wherein the wall of the hole of the first mounting hole (513) and/or the outer wall of the second mounting protrusion (11) is provided with a wear resistant coating.

9. The electronic expansion valve according to claim 3, wherein the main body (61) comprises a connecting plate (611) and a stop rod (612) connected to each other, the connecting plate (611) being connected to the rotor assembly (20), the stop rod (612) extending towards one side of the connecting plate (611), the drive rod (62) extending towards the other side of the connecting plate (611), the stop rod (612) being adapted to stop the rotor assembly (20).

10. An electronic expansion valve according to claim 9, wherein the rotor assembly (20) comprises a magnetic core (21) and a rotor plate (22), the rotor plate (22) being fixedly arranged within the magnetic core (21), the rotor plate (22) having a fourth mounting protrusion (221), the connecting plate (611) being fitted over the fourth mounting protrusion (221), the stop rod (612) passing through the rotor plate (22) and extending in a direction away from the magnetic member (51).