Rotor assembly, electronic expansion valve and refrigeration equipment
By designing the limiting hole and limiting structure of the limiting rod, the problem of demagnetization of the magnetic rotor caused by welding is solved, which improves the stability and reliability of the rotor assembly and the electronic expansion valve, and achieves precise control and reduces wear.
Patent Information
- Application Number
- CN202520025450.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-06
AI Technical Summary
In the prior art, when the limit rod is installed on the rotor assembly by welding, the high temperature generated by welding can easily burn the magnetic rotor, causing demagnetization and affecting the performance of the electronic expansion valve.
The limiting rod consists of a connecting section and a limiting section. It is fixed by limiting holes and limiting structures to avoid demagnetization caused by high welding temperatures. It uses snap rings or snap plates for limiting. Combined with the design of annular grooves and connecting plates, it ensures stable installation of the limiting rod.
This improved the yield rate of rotor assemblies and the stability of electronic expansion valves, reduced component wear and failures caused by shaking, and ensured precise control and stable operation of electronic expansion valves.
Smart Images
Figure CN223678018U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of refrigeration equipment, in particular to a rotor assembly, electronic expansion valve and refrigeration equipment. BACKGROUND
[0002] In the prior art, the limiting rod is installed in the rotor assembly by welding, since the rotor assembly also includes a magnetic rotor, the high temperature generated by welding is easy to burn the magnetic rotor when welding the limiting rod, resulting in demagnetization of the magnetic rotor and affecting the performance of the electronic expansion valve. SUMMARY
[0003] The utility model discloses a rotor assembly, electronic expansion valve and refrigeration equipment, which aims to improve the stability of the rotor assembly.
[0004] To achieve the above-mentioned purpose, the rotor assembly provided by the utility model comprises:
[0005] A magnetic rotor in the form of a ring is used to accommodate a valve rod and a nut;
[0006] A connecting plate is connected to the magnetic rotor and used to fixedly connect the valve rod, and a limiting hole is arranged on the connecting plate;
[0007] A limiting rod comprising a connecting section and a limiting section connected to each other, the limiting section passes through the limiting hole and extends along the axial direction of the magnetic rotor; and
[0008] A limiting structure connected to the connecting plate, and the connecting section is clamped between the connecting plate and the limiting structure.
[0009] In an embodiment, the limiting section abuts against the hole wall of the limiting hole along the two side walls in the circumferential direction of the magnetic rotor.
[0010] In an embodiment, the limiting structure is a snap spring, a snap spring groove is arranged on the connecting plate, the snap spring is clamped in the snap spring groove, and the connecting section is clamped between the connecting plate and the snap spring.
[0011] In an embodiment, a mounting ring table is arranged on the connecting plate, the snap spring groove is arranged on the outer peripheral surface of the mounting ring table, the connecting section is in the form of a ring, and the connecting section is sleeved on the outer periphery of the mounting ring table.
[0012] In an embodiment, an annular groove is arranged on the inner peripheral wall of the magnetic rotor, and the connecting plate is mounted in the annular groove.
[0013] In an embodiment, the outer periphery of the connecting plate is concave-convex, and the groove wall of the annular groove is matched with the outer periphery of the connecting plate.
[0014] In an embodiment, the connecting section is integrally formed with the limiting section.
[0015] In an embodiment, the connecting plate is integrally formed with the magnetic rotor by injection molding.
[0016] The utility model also provides an electronic expansion valve, including the rotor subassembly as described above.
[0017] The utility model also provides a refrigeration equipment, including the electronic expansion valve as described above.
[0018] The utility model discloses a technical scheme, the connecting plate is equipped with the limiting hole, and the limiting rod includes the connecting section and the limiting section, wherein, the limiting section passes through the limiting hole, thereby limiting the circumference of limiting rod, then through the limiting structure of connecting to the connecting plate, thereby make the connecting section be set up between the limiting structure and the connecting plate, thereby limiting the axial direction of limiting rod, thereby realize the installation fixed of limiting rod through the limiting structure and the limiting hole, compared with the technical scheme of prior art through the limiting rod welding in the connecting plate technical scheme, the utility model discloses a technical scheme avoids the condition of rotor demagnetization because of the high temperature of welding limiting rod, and then improves the yield of rotor subassembly, and then improves the stability of rotor subassembly and electronic expansion valve. ACCURATE DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to the structure shown in these drawings without paying creative labor.
[0020] Figure 1 The structure schematic diagram of an embodiment of the rotor subassembly provided by the utility model is shown in the figure.
[0021] Figure 2 The structure schematic diagram of an embodiment of the rotor subassembly provided by the utility model is shown in the figure. Figure 1 The explosion map of the rotor subassembly provided by the utility model is shown in the figure.
[0022] Figure 3 The structure schematic diagram of an embodiment of the rotor subassembly provided by the utility model is shown in the figure. Figure 1 The sectional view of the connecting plate in the rotor subassembly is shown in the figure.
[0023] Figure 4 The structure schematic diagram of an embodiment of the rotor subassembly provided by the utility model is shown in the figure. Figure 1 The structure schematic diagram of an embodiment of the rotor subassembly provided by the utility model is shown in the figure.
[0024] Figure 5 The structure schematic diagram of an embodiment of the rotor subassembly provided by the utility model is shown in the figure. Figure 1 The structure schematic diagram of another embodiment of the rotor subassembly provided by the utility model is shown in the figure.
[0025] Figure 6 The structure schematic diagram of another embodiment of the rotor subassembly provided by the utility model is shown in the figure.Figure 1 Structure diagram of middle magnetic rotor;
[0026] Figure 7 For Figure 1 Structure diagram of middle limiting rod;
[0027] Figure 8 Structure diagram of an embodiment of electronic expansion valve provided by the utility model.
[0028] Explanation of reference numerals:
[0029] 10, magnetic rotor; 11, annular groove; 20, connecting plate; 21, limiting hole; 22, mounting ring table; 221, clamping spring groove; 30, limiting rod; 31, connecting section; 32, limiting section; 40, clamping spring; 51, valve rod; 52, nut; 521, limiting sliding ring; 53, valve seat; 531, valve port.
[0030] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. Specific implementation
[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0032] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.
[0033] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.
[0034] Referring to Figure 1 , Figure 2 and Figure 8 , the utility model proposes a kind of rotor assembly, comprising:
[0035] Magnetic rotor 10, the magnetic rotor 10 is annular, it is used to accommodate valve stem 51 and nut 52;
[0036] Connecting plate 20, the connecting plate 20 is connected to the magnetic rotor 10, and is used to be fixedly connected for valve stem 51, limit hole 21 is equipped on the connecting plate 20;
[0037] Limiting rod 30, the limiting rod 30 includes the connecting section 31 and limiting section 32 connected, the limiting section 32 passes through the limit hole 21, and extend along the axial direction of the magnetic rotor 10;And
[0038] Limiting structure, the limiting structure is connected to the connecting plate 20, and the connecting section 31 is clamped between the connecting plate 20 and the limiting structure.
[0039] The utility model discloses a technical scheme in which the connecting plate 20 is provided with a limiting hole 21, and the limiting rod 30 comprises a connecting section 31 and a limiting section 32 connected with each other. The limiting section 32 passes through the limiting hole 21, thereby limiting the circumference of the limiting rod 30. Then, the limiting structure connected with the connecting plate 20 is used, so that the connecting section 31 is clamped between the limiting structure and the connecting plate 20, thereby limiting the axial direction of the limiting rod 30. The limiting structure and the limiting hole 21 are used to realize the installation and fixation of the limiting rod 30. Compared with the technical scheme in the prior art in which the limiting rod 30 is welded to the connecting plate 20, the utility model technical scheme avoids the demagnetization of the rotor caused by the high temperature generated by welding the limiting rod 30, thereby improving the yield of the rotor assembly and the stability of the electronic expansion valve. The limiting hole 21 can be one or multiple.
[0040] The utility model discloses a technical scheme in which the rotor assembly operates as follows: the controller receives the signals of the temperature sensor and the pressure sensor, and then the motor drives the magnetic rotor 10 through electromagnetic induction. When the coil of the motor is electrified, a rotating magnetic field is generated around the coil. The magnetic lines of the magnetic field pass through the shell and interact with the magnetic field around the magnetic rotor 10. Since the magnetic rotor 10 itself has magnetism, it starts to rotate under the drive of the external magnetic field, and then drives the connecting plate 20 and the limiting rod 30 to rotate. The valve rod 51 is fixedly connected to the connecting plate 20, and the nut 52 is threadedly connected to the valve rod 51. Therefore, when the magnetic rotor 10 rotates, the valve rod 51 moves axially through the threads in the nut 52. The valve core at the front end of the valve rod 51 cooperates with the valve hole on the valve seat 53. The up-and-down movement of the valve rod 51 changes the gap between the valve core and the valve hole, thereby changing the opening size of the valve port 531 and accurately controlling the amount of refrigerant entering the evaporator.
[0041] Specifically, the two side walls of the limiting section 32 along the circumferential direction of the magnetic rotor 10 abut against the hole walls of the limiting hole 21, thereby reducing the gap between the two side walls of the limiting section 32 along the circumferential direction of the magnetic rotor 10 and the hole walls of the limiting hole 21. During the rotation of the magnetic rotor 10, the cooperation between the limiting section 32 and the limiting hole 21 can effectively prevent the radial displacement and shaking of the magnetic rotor 10, so that the rotation of the magnetic rotor 10 is more stable, thereby improving the stability and reliability of the electronic expansion valve, and reducing the component wear and failure caused by shaking and the like. At the same time, the abutment of the limiting rod 30 and the hole walls of the limiting hole 21 can accurately limit the rotation range of the magnetic rotor 10, so as to ensure that the magnetic rotor 10 rotates within a predetermined angle, thereby realizing the accurate control of the opening of the electronic expansion valve, such as the accurate adjustment of the refrigerant flow in the air conditioning system.
[0042] Further, the outer peripheral wall of the nut 52 is provided with a limiting sliding ring 521. In this process, the magnetic rotor 10, the connecting plate 20 and the limiting rod 30 rotate around the center of the valve rod 51 and also synchronously move linearly along the axial direction of the valve rod 51. When the limiting rod 30 contacts the limiting sliding ring 521, the limiting sliding ring 521 rotates along the guide groove on the outer periphery of the nut 52 to realize the movement in the axial direction of the nut 52. When the valve rod 51 completely closes the valve port 531, the limiting sliding ring 521 also moves to the end of the guide groove, and at this time, the limiting sliding ring 521 is in the limit position. Thus, the limiting sliding ring 521 cannot continue to rotate, and the limiting rod 30 acts on the magnetic rotor 10, thereby limiting the rotation of the magnetic rotor 10. That is, at this time, the magnetic rotor 10, the connecting plate 20, the limiting rod 30 and the valve rod 51 cannot continue to move towards the valve port 531, thereby avoiding damage to the components in the electronic expansion valve. Similarly, when the valve port 531 is opened to a certain extent, the limiting sliding ring 521 is in another limit position to avoid the rotor assembly from moving away from the valve port 531, thereby ensuring the stability of the electromagnetic expansion valve.
[0043] With reference to Figures 3 to 5 Specifically, the limiting structure is a snap spring 40, the connecting plate 20 is provided with a snap spring groove 221, the snap spring 40 is clamped in the snap spring groove 221, and the connecting section 31 is clamped between the connecting plate 20 and the snap spring 40. The snap spring 40 is convenient to install, has low cost and stable and reliable performance. Of course, in other embodiments, the limiting structure can also be a clamping plate, which is fixed in the snap spring groove 221 to limit the axial direction of the limiting rod 30.
[0044] Further, the connecting plate 20 is provided with a mounting ring table 22, the snap spring groove 221 is arranged on the outer peripheral surface of the mounting ring table 22, the connecting section 31 is annular, and the connecting section 31 is sleeved on the outer periphery of the mounting ring table 22. By sleeving the connecting section 31 of the limiting rod 30 on the outer periphery of the mounting ring table 22, the radial direction of the limiting rod 30 is limited; at the same time, the outer peripheral wall of the valve rod 51 is fixedly connected to the inner peripheral wall of the mounting ring table 22.
[0045] In an embodiment, the inner circumferential wall of the magnetic rotor 10 is provided with an annular groove 11, and the connecting plate 20 is installed in the annular groove 11. The annular groove 11 provides a stable installation position for the connecting plate 20, making the connection between the two more tight and stable, and effectively preventing the connecting plate 20 from loosening or falling off due to centrifugal force and other factors when the magnetic rotor 10 rotates at high speed, ensuring the normal operation of the electronic expansion valve. When the magnetic rotor 10 rotates under the action of the magnetic field force, the cooperation between the annular groove 11 and the connecting plate 20 can make the force more evenly transmitted to the valve rod 51 and other components, avoiding damage to the components due to excessive local stress, and improving the reliability and service life of the electronic expansion valve. Finally, the design of the annular groove 11 can make full use of the space inside the magnetic rotor 10, making the structure of the electronic expansion valve more compact, realizing more functions in a limited space, and further facilitating the miniaturization of the rotor assembly.
[0046] With reference to Figures 4 to 6 Further, the outer periphery of the connecting plate 20 is provided with a concave-convex structure, and the groove wall of the annular groove 11 is matched with the outer periphery of the connecting plate 20. Thus, the contact area between the outer periphery of the connecting plate 20 and the groove wall of the annular groove 11 is increased, making the connection between the connecting plate 20 and the annular groove 11 more tight and stable, and further effectively reducing the displacement or shaking of the connecting plate 20 relative to the magnetic rotor 10 during high-speed rotation of the magnetic rotor 10 and operation of the equipment, ensuring the synchronous movement of the two, maintaining the normal operation of the electronic expansion valve, and further improving the stability and reliability of the electronic expansion valve. When the magnetic rotor 10 rotates under the action of the magnetic field force, the concave-convex structure can make the force transmitted to the connecting plate 20 along a specific direction and path, and then transmitted to the valve rod 51 and other components by the connecting plate 20, reducing the loss and dispersion of the force, improving the response speed and control accuracy of the electronic expansion valve. Finally, the concave-convex structure of the outer periphery helps to improve the rotational balance of the magnetic rotor 10. Due to the symmetry and uniformity of the concave-convex structure, the mass distribution of the magnetic rotor 10 during rotation is more reasonable, reducing the vibration and noise caused by mass imbalance, prolonging the service life of the equipment, and improving the stability and reliability of the operation.
[0047] With reference to Figure 7 Wherein, the connecting section 31 and the limiting section 32 are integrally formed, thereby improving the connection strength between the connecting section 31 and the limiting section 32, and further improving the structural strength of the limiting rod 30. Understandably, when the magnetic rotor 10 drives the connecting plate 20 and the limiting rod 30 to rotate at high speed and during operation of the equipment, the limiting section 32 of the limiting rod 30 is prevented from breaking during high-speed rotation, thereby improving the stability and reliability of the rotor assembly and the electronic expansion valve. Wherein, the integrally formed connecting section 31 and limiting section 32 can be integrally formed by welding, integrally formed by injection molding, integrally formed by bending, etc.
[0048] In an embodiment, the connecting plate 20 is integrally formed with the magnetic rotor 10 by injection molding. Thus, the connecting strength between the connecting plate 20 and the magnetic rotor 10 is improved, so that greater centrifugal force, vibration force and other external forces can be borne when the electronic expansion valve is in operation, effectively preventing relative displacement, loosening or even falling off of the connecting plate 20 and the magnetic rotor 10, ensuring the integrity and stability of the structure, and further improving the stability of the electronic expansion valve. Further, the force generated when the magnetic rotor 10 rotates can be directly and uniformly transmitted to the connecting plate 20, avoiding force transmission loss and unevenness caused by gaps or loose connection at the connecting part, improving the force transmission efficiency, enabling the valve rod 51 and other components to more accurately respond to the rotation of the magnetic rotor 10, and improving the control accuracy and response speed of the electronic expansion valve. At the same time, the integrally formed connecting plate 20 and the magnetic rotor 10 can ensure the concentricity, reducing the problem of poor concentricity caused by assembly errors and other factors; during the operation of the electronic expansion valve, the center of rotation of the magnetic rotor 10 and the geometric center can be kept in good coincidence, avoiding the deflection of the magnetic rotor 10, thereby improving the service life of the rotor assembly and the electronic expansion valve, and improving the stability and reliability of the rotor assembly and the electronic expansion valve.
[0049] The utility model discloses still propose a kind of electronic expansion valve, and the electronic expansion valve includes rotor assembly, valve rod 51, nut 52, valve core, valve seat 53 and shell, the specific structure of the rotor assembly refers to above-mentioned embodiment, since electronic expansion valve in the technical scheme of the utility model adopts all technical solutions of above-mentioned all embodiments, at least has all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer elaborates one by one.
[0050] The utility model discloses still propose a kind of refrigeration equipment, wherein, refrigeration equipment can be divided into compression refrigeration equipment, absorption refrigeration equipment, vapor injection refrigeration equipment, heat pump refrigeration equipment and electric heating refrigeration device etc..Refrigeration equipment mainly includes motor, compressor, electronic expansion valve, evaporator, condenser and accessory, pipeline. Such as refrigerator, air conditioner etc. The specific structure of the electronic expansion valve refers to above-mentioned embodiment, since refrigeration equipment in the utility model adopts all technical solutions of above-mentioned all embodiments, at least has all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer elaborates one by one.
[0051] The above-mentioned is only the exemplary embodiment of the utility model, and not therefore limit the patent range of the utility model, all equivalent structure transformations made in the technical concept of the utility model using the utility model specification and drawing contents or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.
Claims
1. A rotor assembly characterized by, The application relates to a magnetic rotor assembly for an electronic expansion valve. The magnetic rotor assembly comprises: a magnetic rotor in the shape of a ring for accommodating a valve stem and a nut; a connecting plate connected to the magnetic rotor and used for fixedly connecting the valve stem, the connecting plate being provided with a limiting hole; a limiting rod comprising a connecting section and a limiting section connected to each other, the limiting section penetrating through the limiting hole and extending along the axial direction of the magnetic rotor; and 2. The rotor assembly of claim 1, wherein a limiting structure connected to the connecting plate, the connecting section being clamped between the connecting plate and the limiting structure.
3. The rotor assembly of claim 1, wherein The two side walls of the limiting section along the circumferential direction of the magnetic rotor are in abutment with the hole walls of the limiting hole.
4. The rotor assembly of claim 3, wherein The limiting structure is a snap spring, the connecting plate is provided with a snap spring groove, the snap spring is clamped in the snap spring groove, and the connecting section is clamped between the connecting plate and the snap spring.
5. The rotor assembly of claim 1, wherein The connecting plate is provided with a mounting ring table, the snap spring groove is arranged on the outer circumferential surface of the mounting ring table, the connecting section is in the shape of a ring, and the connecting section is sleeved on the outer periphery of the mounting ring table.
6. The rotor assembly of claim 5, wherein The inner circumferential wall of the magnetic rotor is provided with an annular groove, and the connecting plate is mounted in the annular groove.
7. The rotor assembly of claim 1, wherein The outer periphery of the connecting plate is concave-convex, and the groove wall of the annular groove is matched with the outer periphery of the connecting plate.
8. The rotor assembly of claim 1, wherein The connecting section and the limiting section are integrally formed.
9. An electronic expansion valve characterized by The connecting plate and the magnetic rotor are integrally formed by injection molding.
10. A refrigeration appliance characterized in that, The application further relates to a rotor assembly comprising any one of the magnetic rotor assemblies according to claims 1 to 8. The application further relates to an electronic expansion valve comprising the magnetic rotor assembly according to claim 9.