Magnetic rotor assembly for electronic expansion valve

Abstract

The utility model relates to a magnetic rotor assembly for an electronic expansion valve, which comprises a magnetic rotor assembly, the magnetic rotor assembly comprises a stop rod, a magnetic rotor and a screw rod, the lower end of the stop rod is horizontally provided with a connecting plate, the connecting plate is provided with a sleeving hole, and the middle part of the screw rod is axially provided with a sleeving limiting part and a supporting plate in sequence from top to bottom. The sleeving limiting part and the supporting plate are both in a circular plate shape, the diameter of the supporting plate is larger than that of the sleeving limiting part, one side of the sleeving limiting part is provided with an anti-rotation tangent plane, the sleeving limiting part is matched with the sleeving hole, the connecting plate is installed on the supporting plate, and the sleeving limiting part, the supporting plate, the connecting plate and the lower portion of the magnetic rotor are integrally formed in an injection molding mode. And the stop rod is vertically arranged upwards along one side of the screw rod. According to the utility model, the anti-rotation tangent plane is matched with the inner wall of the sleeving hole, so that the sleeving limiting part is prevented from rotating relative to the inner wall of the sleeving hole, and the sleeving limiting part is matched with the sleeving hole, so that subsequent integral injection molding is facilitated, and the strength of the whole assembly is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic expansion valves, in particular to a magnetic rotor assembly used for electronic expansion valves. Background Art

[0002] Energy conservation and emission reduction are urgent problems that humans need to solve today. The throttling device plays a key role in the refrigeration system. By selecting a suitable throttling mechanism to match the refrigeration system, the energy consumption of the entire refrigeration system can be reduced. The working principle of throttling is that when the refrigerant flows through the valve, the flow cross-section suddenly shrinks, the fluid flow rate accelerates, and the pressure drops, thereby achieving the function of regulating the flow, controlling the superheat and the evaporation liquid level. Therefore, the regulation of the flow of the throttling mechanism plays a very important role in energy conservation and consumption reduction of the refrigeration device. In some occasions where the load changes drastically or the operating conditions are wide, traditional throttling elements (such as capillaries, thermal expansion valves, etc.) can no longer meet the requirements of comfort and energy saving. The temperature sensing package of the thermal expansion valve has obvious delay characteristics, which makes it difficult to respond quickly and effectively to the flow change with the compressor displacement, which ultimately leads to the oscillation of the system regulation, causing the machine to operate unstably and even damage the compressor network. Therefore, the electronic expansion valve is gradually replacing the traditional throttling element. The electronic expansion valve is superior to the traditional throttling mechanism in superheat control (liquid level control) and flow regulation, and has a faster response speed, a wider adjustment range, and a more significant energy-saving effect, and has broad application prospects.

[0003] At present, the magnetic rotor structure in the existing electronic expansion valve generally includes a magnetic rotor, a stop rod, a screw and a limiter, the limiter is installed on the upper part of the magnetic rotor, the stop rod is welded and fixed on the limiter, and the screw is fixedly connected to the limiter. The overall structural strength of the entire assembly structure is relatively low, and the limiter and the stop rod are only fixed by welding, which requires sufficient welding strength to prevent the limiter and the stop rod from rotating relative to each other, which has great limitations. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a magnetic rotor assembly for an electronic expansion valve, wherein the cooperation between a sleeve limit portion and a sleeve hole can realize rapid assembly between a connecting plate and a screw rod, an anti-rotation cut surface is provided on one side of the sleeve limit portion, and the anti-rotation cut surface cooperates with an inner wall of the sleeve hole to prevent the sleeve limit portion from rotating relative to the inner wall of the sleeve hole, and the cooperation between the sleeve limit portion and the sleeve hole is conducive to the subsequent integral injection molding of the sleeve limit portion, the support plate, the connecting plate and the lower part of the magnetic rotor, thereby ensuring the strength of the entire assembly.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to provide a magnetic rotor assembly for an electronic expansion valve, including a magnetic rotor assembly, the magnetic rotor assembly including a stop rod, a magnetic rotor and a screw rod, a connecting plate is horizontally arranged at the lower end of the stop rod, a sleeve hole is opened on the connecting plate, a sleeve limit part and a support plate are axially arranged in sequence from top to bottom in the middle part of the screw rod, the sleeve limit part and the support plate are both in the shape of a circular plate, the diameter of the support plate is larger than the diameter of the sleeve limit part, an anti-rotation cut surface is opened on one side of the sleeve limit part, the sleeve limit part cooperates with the sleeve hole, the connecting plate is installed on the support plate, the sleeve limit part, the support plate, the connecting plate and the lower part of the magnetic rotor are integrally injection-molded together, the stop rod is vertically arranged upward along one side of the screw rod, and the lower end of the screw rod is a threaded column.

[0006] As a supplement to the technical solution of the utility model, the stop rod and the connecting plate are integrally formed.

[0007] As a supplement to the technical solution described in the utility model, a stepped shaft is axially arranged in the middle of the screw rod below the support plate, and the stepped shaft is used for sleeve bearings.

[0008] As a supplement to the technical solution described in the utility model, the magnetic rotor is made of NC55H magnet material.

[0009] Beneficial effects: The utility model relates to a magnetic rotor assembly for an electronic expansion valve. The cooperation between the sleeve limit part and the sleeve hole can realize the rapid assembly between the connecting plate and the screw. The connecting plate is installed on the support plate. An anti-rotation cut surface is provided on one side of the sleeve limit part. The anti-rotation cut surface cooperates with the inner wall of the sleeve hole to prevent the sleeve limit part from rotating relative to the inner wall of the sleeve hole, thereby playing a role in limiting rotation. Moreover, the cooperation between the sleeve limit part and the sleeve hole is conducive to the subsequent integral injection molding of the sleeve limit part, the support plate, the connecting plate and the lower part of the magnetic rotor to ensure the strength of the entire assembly. The stop rod and the connecting plate are integrally formed to ensure the connection strength and structural stability between the two, eliminate the assembly structure between the stop rod and the connecting plate, and simplify the installation steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cross-sectional view of the utility model;

[0011] Figure 2 It is a structural schematic diagram of the utility model;

[0012] Figure 3 It is a structural schematic diagram of the screw rod and the stop rod described in the utility model;

[0013] Figure 4 It is a structural schematic diagram of the stop rod described in the utility model;

[0014] Figure 5 It is a structural schematic diagram of the screw described in the utility model;

[0015] Figure 6 The present invention is a structural schematic diagram of an electronic expansion valve using the magnetic rotor assembly.

[0016] Illustration: 1. Stop rod, 2. Magnetic rotor, 3. Screw, 4. Threaded column, 5. Connecting plate, 6. Socket hole, 7. Socket limiter, 8. Support plate, 9. Anti-rotation cut surface, 10. Step shaft, 11. Bearing, 12. Valve seat, 13. Valve needle assembly. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0018] The embodiment of the utility model relates to a magnetic rotor assembly for an electronic expansion valve, such as Figure 1-6 As shown, it includes a magnetic rotor assembly, which includes a stop rod 1, a magnetic rotor 2 and a screw rod 3. A connecting plate 5 is horizontally arranged at the lower end of the stop rod 1, and a socket hole 6 is opened on the connecting plate 5. A socket limit portion 7 and a support plate 8 are axially arranged in the middle part of the screw rod 3 from top to bottom. The socket limit portion 7 and the support plate 8 are both circular plate-shaped, and the diameter of the support plate 8 is larger than the diameter of the socket limit portion 7. An anti-rotation cut surface 9 is opened on one side of the socket limit portion 7, and the socket limit portion 7 cooperates with the socket hole 6. The connecting plate 5 is installed on the support plate 8, and the socket limit portion 7, the support plate 8, the connecting plate 5 and the lower part of the magnetic rotor 2 are integrally injection molded together. The stop rod 1 is vertically arranged upward along one side of the screw rod 3, and the lower end of the screw rod 3 is a threaded column 4.

[0019] The inner hole shape of the sleeve hole 6 matches the shape of the sleeve limit part 7. The cooperation between the sleeve limit part 7 and the sleeve hole 6 can realize the rapid assembly between the connecting plate 5 and the screw rod 3. The connecting plate 5 is installed on the support plate 8. An anti-rotation cut surface 9 is provided on one side of the sleeve limit part 7. The anti-rotation cut surface 9 cooperates with the inner wall of the sleeve hole 6 to prevent the sleeve limit part 7 from rotating relative to the inner wall of the sleeve hole 6, thereby playing a role in limiting rotation; and the cooperation between the sleeve limit part 7 and the sleeve hole 6 is conducive to the subsequent integral injection molding of the sleeve limit part 7, the support plate 8, the connecting plate 5 and the lower part of the magnetic rotor 2 to ensure the strength of the entire assembly; the stop rod 1 and the connecting plate 5 are integrally formed to ensure the connection strength and structural stability between the two, eliminate the assembly structure between the stop rod 1 and the connecting plate 5, and simplify the installation steps.

[0020] A stepped shaft 10 is axially arranged in the middle of the screw rod 3 below the support plate 8 . The diameter of the stepped shaft 10 decreases step by step from top to bottom. The stepped shaft 10 is used to sleeve a bearing 11 .

[0021] The magnetic rotor 2 is made of NC55H magnet material.

[0022] like Figure 6 As shown, a bearing 11 is installed in the upper part of the valve seat 12, and the screw 3 cooperates with the bearing 11 through the stepped shaft 10 to realize the free rotation of the screw 3. A valve needle assembly 13 that slides up and down is installed inside the valve seat 12, and the threaded column 4 at the lower end of the stepped shaft 10 is threadedly connected with the valve needle assembly 13. The magnetic rotor 2 rotates under the action of the excitation magnetic field, thereby driving the screw 3 to rotate, and further driving the valve needle assembly 13 to move up and down, so as to realize the change of the opening of the valve port at the bottom of the valve seat 12, thereby achieving the purpose of regulating the flow and pressure of the fluid medium.

[0023] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0024] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0025] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0026] The above is a detailed introduction to a magnetic rotor assembly for an electronic expansion valve provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A magnetic rotor assembly for an electronic expansion valve, comprising a magnetic rotor assembly, Features: The magnetic rotor assembly comprises a stop rod (1), a magnetic rotor (2) and a screw rod (3); a connecting plate (5) is horizontally arranged at the lower end of the stop rod (1); a sleeve hole (6) is opened on the connecting plate (5); a sleeve limit portion (7) and a support plate (8) are axially arranged in sequence from top to bottom in the middle of the screw rod (3); the sleeve limit portion (7) and the support plate (8) are both in the shape of a circular plate; the diameter of the support plate (8) is larger than that of the sleeve limit portion (7). ), one side of the sleeve limit portion (7) is provided with an anti-rotation cut surface (9), the sleeve limit portion (7) cooperates with the sleeve hole (6), the connecting plate (5) is installed on the support plate (8), the sleeve limit portion (7), the support plate (8), the connecting plate (5) and the lower part of the magnetic rotor (2) are integrally injection molded together, the stop rod (1) is arranged vertically upward along one side of the screw rod (3), and the lower end of the screw rod (3) is a threaded column (4).

2. A magnetic rotor assembly for an electronic expansion valve according to claim 1, Features: The stop rod (1) and the connecting plate (5) are integrally formed.

3. A magnetic rotor assembly for an electronic expansion valve according to claim 1, Features: A stepped shaft (10) is axially arranged in the middle of the screw rod (3) below the support plate (8), and a bearing (11) is sleeved on the stepped shaft (10).

4. A magnetic rotor assembly for an electronic expansion valve according to claim 1, Features: The magnetic rotor (2) is made of NC55H magnet material.

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