Electronic expansion valve rotor

Abstract

The utility model provides an electronic expansion valve rotor, which relates to the technical field of refrigeration and air conditioning, and comprises an electronic expansion valve main body and a strong magnetic structure rotatably connected in the electronic expansion valve main body, the strong magnetic structure is internally provided with a rotor structure, and the top of the strong magnetic structure is provided with a detachable top cover. A plurality of guide grooves are uniformly formed in the inner circumference of the strong magnetic structure, concave annular grooves which are communicated with one another are further formed between the guide grooves, balls are arranged on the periphery of the rotor structure, and the balls can be inserted along openings of the guide grooves and can enter the concave annular grooves to rotate after rotating operation. According to the rotor structure, through the synergistic effect of the balls, the inwards-concave annular grooves and the limiting pieces, movement of the rotor can be effectively restrained, it is ensured that the rotor can only rotate around the axis in a single mode, and redundant freedom degrees are avoided. By means of the design, the electromagnetic coupling efficiency is improved, and refrigerant flow adjustment is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration and air conditioning, in particular to an electronic expansion valve rotor. Background Art

[0002] In today's refrigeration and air conditioning technology, electronic expansion valves (EEVs) play a crucial role in ensuring the efficient and stable operation of the entire refrigeration system. The EEV rotor is the key moving component that controls the refrigerant flow. With the continuous advancement of technology and the continuous improvement of industry standards, the performance requirements for EEVs are becoming increasingly stringent.

[0003] Traditional electronic expansion valve rotors have gradually exposed some problems in practical applications. During the coordinated operation of the rotor and the external strong magnetic structure, the lack of precise positioning design makes the rotor's rotation state relatively complex and unstable. In addition to the desired degree of freedom of rotation about the axis, the rotor may also have unnecessary degrees of freedom such as translation, tilt, or swing in other directions. For example, during the operation of refrigeration equipment, due to factors such as internal system pressure fluctuations, pipeline vibration, and external environmental interference, the unstable rotation of the rotor will cause the relative position deviation between it and the stator to increase, thereby reducing the electromagnetic coupling efficiency and affecting the electronic expansion valve's precise regulation of the refrigerant flow. In addition, this unstable rotation will also increase friction and wear between the rotor and related components such as the stator and valve seat, shortening the service life of the electronic expansion valve and increasing the maintenance frequency and repair costs of the equipment.

[0004] In summary, an electronic expansion valve rotor is proposed, which can effectively constrain the movement of the rotor when the rotor rotates relative to an external strong magnetic structure, thereby improving the positioning accuracy of the rotor. Utility Model Content

[0005] This new invention addresses the shortcomings of existing technologies. The rotor structure, through the coordinated action of balls, concave annular grooves, and position-limiting elements, effectively constrains the rotor's movement, ensuring it can only rotate singly about its axis, eliminating unnecessary degrees of freedom. This design improves electromagnetic coupling efficiency and enables more precise refrigerant flow regulation.

[0006] In order to solve the above technical problems, the present invention solves the problem of improving the positioning accuracy of the rotor through the following technical solutions.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] An electronic expansion valve rotor includes an electronic expansion valve body and a strong magnetic structure rotatably connected to the electronic expansion valve body. A rotor structure is provided inside the strong magnetic structure. A removable top cover is provided on the top of the strong magnetic structure. A plurality of guide grooves are evenly opened on the inner circumference of the strong magnetic structure, and mutually connected concave annular grooves are also opened between the guide grooves. Balls are provided on all four sides of the rotor structure. The balls can be inserted along the guide groove openings and can enter the concave annular grooves for rotation after a rotation operation.

[0009] Preferably, a support bracket is provided outside the ball, and the support bracket is connected to the outer wall of the rotor structure.

[0010] Preferably, the ball can rotate relative to the interior of the support bracket, one end of the ball protrudes from the outside of the support bracket and can roll along the inner wall of the guide groove or the concave annular groove.

[0011] Preferably, a plurality of arc-shaped openings are evenly formed on the outer circumference of the rotor structure, and the arc-shaped openings allow the other end of the ball to be rotatably connected therein.

[0012] Preferably, a limiting clamping plate is inserted into the guide groove from top to bottom.

[0013] Preferably, the limiting clamping plate is located above the supporting bracket and the concave annular groove.

[0014] Preferably, a preset screw hole is opened on the upper part of the interior of the limit clamping plate, and the preset screw hole is rotatably connected to the inner wall of the electronic expansion valve body through a fastening bolt thread.

[0015] Preferably, a stabilizing pad is provided between the fastening bolt and the preset screw hole for stability.

[0016] Preferably, a positioning groove is further provided inside the preset screw hole, and the positioning groove allows the stabilizing pad to be inserted therein.

[0017] Preferably, a plurality of limiting members are evenly connected to the inner periphery of the concave annular groove to limit the rotation of the guide groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The electronic expansion valve rotor provided in this application features a rotor structure that effectively constrains its movement through the coordinated action of balls, concave annular grooves, and position-limiting elements, ensuring a single rotation around its axis and eliminating redundant degrees of freedom. This design improves electromagnetic coupling efficiency and enables more precise refrigerant flow regulation.

[0020] In this application, the balls roll along the guide grooves and the inner wall of the concave annular groove, significantly reducing frictional resistance during rotor rotation, making rotation smoother and avoiding jamming. This helps extend the life of the electronic expansion valve and reduces maintenance frequency and costs.

[0021] The rotor structure design of this application incorporates effective positioning aids, such as fastening bolts and stabilizing pads, to ensure accurate initial installation of the rotor within the valve body. This not only improves production efficiency but also reduces difficulty and errors during assembly.

[0022] This application improves the stability of the entire refrigeration system by optimizing the rotor structure design. The stable rotation of the rotor reduces the relative position deviation between the rotor and the stator, thereby ensuring the stability of the electromagnetic coupling efficiency and further improving the performance and reliability of the refrigeration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the overall split structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the utility model when it is split as a whole;

[0027] Figure 4 It is a schematic diagram of the local structure of the utility model in the assembled state;

[0028] Figure 5 This is a schematic diagram of the front view of the strong magnetic structure of the utility model;

[0029] Figure 6 It is a schematic diagram of the partial structure of the right side cross section of the present invention;

[0030] Figure 7 This is a partial structural diagram of the limit clamping plate, ball bearings and fastening bolts of the utility model;

[0031] Figure 8 For this utility model Figure 7 Schematic diagram of the split local structure in ;

[0032] Figure 9 For this utility model Figure 8 Schematic diagram of the cross-sectional structure viewed from above at the middle fastening bolt and limit clamp.

[0033] Explanation of the figure numbers: 1. Electronic expansion valve body; 2. Strong magnetic structure; 201. Rotor structure; 202. Top cover; 3. Guide groove; 301. Concave annular groove; 302. Limiting piece; 303. Arc-shaped opening; 4. Limiting card; 402. Preset screw hole; 403. Positioning groove; 5. Ball bearing; 501. Support bracket; 6. Fastening bolt; 601. Stabilizing pad. DETAILED DESCRIPTION

[0034] The present invention is described in further detail below with reference to the accompanying drawings.

[0035] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0036] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0037] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity. Example

[0038] See also Figure 1-9 A rotor of an electronic expansion valve comprises an electronic expansion valve body 1 and a strong magnetic structure 2 rotatably connected to the electronic expansion valve body 1. A rotor structure 201 is provided inside the strong magnetic structure 2. A removable top cover 202 is provided on the top of the strong magnetic structure 2. A plurality of guide grooves 3 are evenly provided on the inner circumference of the strong magnetic structure 2, and mutually connected concave annular grooves 301 are also provided between the guide grooves 3. Balls 5 are provided around the rotor structure 201. The balls 5 can be inserted along the opening of the guide groove 3 and can enter the concave annular groove 301 and rotate after a rotation operation.

[0039] The electronic expansion valve rotor of the present application is mainly composed of an electronic expansion valve body 1, a strong magnetic structure 2, a rotor structure 201, a guide groove 3, an inwardly concave annular groove 301, an inwardly concave annular groove 301, a limit clamp 4 and a ball 5. The following is a detailed structure and working principle.

[0040] 1. Component preparation and initial assembly

[0041] Assemble the ball (5) and support bracket (501)

[0042] Place the ball (5) into the support bracket (501). The support bracket (501) is connected to the outer wall of the rotor structure (201). Ensure that one end of the ball (5) protrudes outside the support bracket (501). The support bracket (501) is fixed to the outer periphery of the arc-shaped opening (303), that is, on the outer wall of the rotor structure (201), so that the ball (5) can roll along the guide groove (3) and the inner wall of the concave annular groove (301); the other end of the ball (5) extends to the inside of the arc-shaped opening (303) uniformly opened on the outer periphery of the rotor structure (201), forming a complete rotation space.

[0043] Limiting card plate (4) assembly

[0044] A limit plate 4 is provided above the ball 5 to restrict the ball 5 from rotating within the concave annular groove 301. The limit plate 4 is inserted through the opening of the guide groove 3 and positioned above the ball 5. A pre-set screw hole 402 is defined within the upper portion of the limit plate 4. After aligning the pre-set screw hole 402 with the screw hole defined in the inner wall of the strong magnetic structure 2, the limit plate 4 is locked in place using a fastening bolt 6.

[0045] Assembly of the second rotor and valve body

[0046] The rotor is inserted into the valve body

[0047] The ball (5) on the rotor structure (201) is inserted along the opening of the guide groove (3), and when the rotor structure (201) is inserted into the correct assembly position of the strong magnetic structure 2, the ball (5) is inserted from the guide groove (3) to the position of the concave annular groove (301).

[0048] The inner concave annular groove (301) and the limiting member (302) are provided with

[0049] A plurality of limiting members (302) are evenly connected to the inner circumference of the concave annular groove (301). These limiting members (302) are used to limit the rotation range of the ball (5) when the rotor is working, and their length is set according to the actual working rotation angle of the rotor.

[0050] Further restrict the rotation of the ball (5)

[0051] A limiting card plate (4) is provided on a flat surface of the upper portion of the ball (5). The limiting card plate (4) does not contact the support bracket (501) outside the ball (5). The limiting card plate (4) is inserted into the opening of the guide groove (3) to further limit the ball (5) from rotating inside the concave annular groove (301).

[0052] Three fixing and connecting parts

[0053] Connect by tightening bolts (6)

[0054] After the limit card plate (4) is inserted into the guide groove (3), a predetermined screw hole (402) provided on the upper portion of the limit card plate (4) is fixedly connected to the inner wall of the electronic expansion valve body (1) by a fastening bolt (6). The predetermined screw hole (402) is T-shaped, so that the head of the fastening bolt (6) can be hidden.

[0055] Use of stabilizing pad (601)

[0056] A stabilizing pad (601) is provided between the fastening bolt (6) and the preset screw hole (402). When the fastening bolt (6) is rotated so that its threaded section passes through the preset screw hole (402) and is fastened into the corresponding thread groove on the electronic expansion valve body (1), compression is generated between the inner end of the head of the fastening bolt (6) and the stabilizing pad (601), ensuring the stability of the connection. The stabilizing pad (601) is inserted into the positioning groove (403) provided in the preset screw hole (402), making it convenient to replace the stabilizing pad (601) when removing the fastening bolt (6).

[0057] Installation of the four top covers (202)

[0058] Finally, the top cover (202) is tightly assembled on the top of the rotor structure (201) by means of snap-fitting, etc., to form a complete electronic expansion valve rotor. The top cover (202) and the rotor structure (201) are designed to be separate, making it convenient for users to remove the cover and inspect the internal components.

[0059] Detailed working principle

[0060] 1. Rotor rotation and refrigerant flow control

[0061] Rotor rotation controls flow

[0062] When the electronic expansion valve is in operation, the rotor structure (201) rotates relative to the electronic expansion valve body (1) under the action of the external strong magnetic structure (2). The rotation of the rotor structure (201) drives the inner core in the middle to move up and down, thereby controlling the flow of the refrigerant.

[0063] Ball bearings (5) reduce friction

[0064] During the rotation of the rotor structure (201), the balls (5) roll along the inner wall of the guide groove (3) and the concave annular groove (301). Due to the presence of the balls (5), the friction resistance of the rotor structure (201) during rotation is reduced, making the rotation smoother and avoiding jamming.

[0065] Positioning and motion constraints of the two-rotor structure (201)

[0066] Constraining the rotor structure (201) motion

[0067] The design of the ball (5), the concave annular groove (301), and the limiting member (302) can effectively constrain the movement of the rotor structure (201). During the rolling process, the position of the ball (5) is restricted by the concave annular groove (301) and the limiting member (302), ensuring that the rotor structure (201) can only rotate around the axis, thereby avoiding unnecessary degrees of freedom such as translation, tilting, or swinging of the rotor in other directions.

[0068] Improve positioning accuracy

[0069] This constrained rotation design improves the positioning accuracy of the rotor, ensures the accuracy of the relative position between the rotor structure (201) and the strong magnetic structure (2), thereby improving the electromagnetic coupling efficiency and achieving precise regulation of the refrigerant flow.

[0070] 3. Structural stability and ease of maintenance

[0071] Ensure structural stability

[0072] The connection of components such as the fastening bolts (6), the stabilizing pads (601), and the pre-set screw holes (402) ensures the stability of the various components of the electronic expansion valve rotor. Furthermore, the T-shaped pre-set screw holes (402) and the use of the stabilizing pads (601) ensure the connection strength while facilitating the removal and replacement of components.

[0073] Easy to maintain and inspect

[0074] The separate design of the top cover (202) and the rotor structure (201) makes it convenient for users to remove the cover to check the internal components when necessary, thereby reducing the maintenance difficulty of the equipment and improving the maintainability of the equipment.

[0075] Through the above detailed implementation methods and working principles, this electronic expansion valve rotor can effectively solve the problems of traditional rotors in positioning accuracy and assembly process, and improve the performance and reliability of the electronic expansion valve.

[0076] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. An electronic expansion valve rotor, comprising an electronic expansion valve body (1) and a strong magnetic structure (2) rotatably connected to the electronic expansion valve body (1), characterized in that: A rotor structure (201) is provided inside the strong magnetic structure (2), a detachable top cover (202) is provided on the top of the strong magnetic structure (2), a plurality of guide grooves (3) are evenly provided on the inner periphery of the strong magnetic structure (2), and mutually connected concave annular grooves (301) are provided between the guide grooves (3), and balls (5) are provided around the rotor structure (201), and the balls (5) can be inserted along the openings of the guide grooves (3) and can enter the concave annular grooves (301) and rotate after a rotation operation.

2. The electronic expansion valve rotor according to claim 1, characterized in that: A support bracket (501) is provided outside the ball (5), and the support bracket (501) is connected to the outer wall of the rotor structure (201).

3. The electronic expansion valve rotor according to claim 2, characterized in that: The ball (5) can rotate relative to the interior of the support bracket (501), one end of the ball (5) protrudes from the outside of the support bracket (501) and can roll along the inner wall of the guide groove (3) or the concave annular groove (301).

4. The electronic expansion valve rotor according to claim 3, characterized in that: A plurality of arc-shaped openings (303) are evenly formed on the outer circumference of the rotor structure (201), and the arc-shaped openings (303) allow the other end of the ball (5) to be rotatably connected therein.

5. The electronic expansion valve rotor according to claim 4, characterized in that: A limiting clamping plate (4) is inserted into the guide groove (3) from top to bottom.

6. The electronic expansion valve rotor according to claim 5, characterized in that: The limiting clamping plate (4) is located above the support bracket (501) and the concave annular groove (301).

7. The electronic expansion valve rotor according to claim 6, characterized in that: A preset screw hole (402) is provided on the upper portion of the interior of the limit clamping plate (4), and the preset screw hole (402) is threadedly connected to the inner wall of the electronic expansion valve body (1) via a fastening bolt (6).

8. The electronic expansion valve rotor according to claim 7, characterized in that: A stabilizing pad (601) is provided between the fastening bolt (6) and the preset screw hole (402) for stabilization.

9. The electronic expansion valve rotor according to claim 8, characterized in that: A positioning groove (403) is further provided inside the preset screw hole (402), and the positioning groove (403) allows the stabilizing pad (601) to be inserted therein.

10. The electronic expansion valve rotor according to claim 1, characterized in that: The inner periphery of the concave annular groove (301) is evenly connected to a plurality of limiting members (302) for limiting the rotation of the guide groove (3).

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