Electronic expansion valve and air conditioner

Abstract

This utility model discloses an electronic expansion valve and an air conditioner, relating to the field of electronic expansion valve technology. The electronic expansion valve includes a housing, a connecting seat, a mounting component, and a coil. The housing has an installation opening. The connecting seat includes a first mounting section, a second mounting section, and a third mounting section connected sequentially. A first mounting end face is formed at the end of the second mounting section near the first mounting section, and a second mounting end face is formed at the end of the third mounting section near the second mounting section. The housing is fitted onto the first mounting section through the installation opening, with the end face of the installation opening abutting against the first mounting end face. The mounting component is tightly fitted onto the outside of the second mounting section and the housing, with its first end face abutting against the second mounting end face. The coil is fitted onto the outside of the housing and abuts against the second end face of the mounting component. The technical solution provided by this utility model can prevent the coil from tilting after assembly, thereby improving the driving force of the coil on the rotor.

Description

Technical Field

[0001] This utility model relates to the field of electronic expansion valve technology, and in particular to an electronic expansion valve and an air conditioner. Background Technology

[0002] The working principle of the electronic expansion valve is based on the principle of a permanent magnet stepper motor. It consists of a coil and a valve body. The coil is the stator and the valve body is the rotor. The valve body generally includes a connecting seat and a housing set on the connecting seat. The coil is sleeved on the outside of the housing. When the coil is energized, it generates excitation, which drives the rotor to rotate. This causes the rotor to move the valve needle up and down in a linear motion, thereby changing the cross-sectional area of ​​the valve port and achieving the function of flow regulation.

[0003] Currently, mounting components are typically installed on the outside of the housing and connector to fix the coil. However, these mounting components are prone to tilting during fixing, which can cause the coil to tilt after assembly. This leads to a misalignment between the coil and the rotor, ultimately resulting in insufficient driving force from the coil to the rotor. Utility Model Content

[0004] The main purpose of this invention is to propose an electronic expansion valve and an air conditioner that aims to solve the problem of tilted housing installation.

[0005] To achieve the above objectives, the electronic expansion valve proposed in this utility model includes:

[0006] A housing, wherein the housing is provided with an installation opening;

[0007] A connecting base includes a first mounting section, a second mounting section, and a third mounting section connected in sequence. The outer diameter of the first mounting section is smaller than the outer diameter of the second mounting section, and the outer diameter of the second mounting section is smaller than the outer diameter of the third mounting section. A first mounting end face is formed at the end of the second mounting section near the first mounting section, and a second mounting end face is formed at the end of the third mounting section near the second mounting section. The housing is sleeved on the first mounting section through the mounting opening, and the end face of the mounting opening abuts against the first mounting end face.

[0008] The mounting component is tightly fitted onto the outer side of the second mounting section and the housing, and the first end face of the mounting component abuts against the second mounting end face; and

[0009] A coil is sleeved on the outside of the housing and abuts against the second end face of the mounting component.

[0010] In one embodiment, the mounting member includes a sleeve section and a mounting flange connected together, the sleeve section being sleeved on the outside of the second mounting section and the housing, and the second end face being formed on the mounting flange.

[0011] In one embodiment, the coil is provided with a fixing member, which is connected to the mounting flange buckle.

[0012] In one embodiment, the mounting flange is provided with a plurality of locking holes along the circumference of the mounting flange, and the fastener engages with one of the locking holes.

[0013] In one embodiment, the mounting component is made of metal.

[0014] In one embodiment, the fastener is made of metal.

[0015] In one embodiment, the first end face of the mounting member is welded to the second mounting end face.

[0016] In one embodiment, the first mounting section is interference-fitted with the housing.

[0017] In one embodiment, the end face of the mounting opening is welded to the first mounting end face.

[0018] In one embodiment, the outer diameter of the housing is equal to the outer diameter of the second mounting section.

[0019] This utility model also proposes an air conditioner, including the aforementioned electronic expansion valve.

[0020] The technical solution of this utility model involves fitting the housing onto the first mounting section through a mounting opening, with the end face of the mounting opening abutting against the first mounting end face. This prevents the housing from tilting relative to the connecting seat, thereby improving the installation accuracy of the housing in the axial direction of the connecting seat. Secondly, the end face of the mounting component abuts against the second mounting end face, further preventing the mounting component from tilting relative to the connecting seat and improving the installation accuracy of the mounting component in the axial direction of the connecting seat. Since the coil is sleeved on the outside of the housing and abuts against the second end face of the mounting component, this solution prevents the mounting component from tilting relative to the connecting seat, and also prevents the coil from tilting relative to the connecting seat, thus improving the installation accuracy of the coil in the axial direction of the connecting seat. This ensures that the housing and the coil are coaxial, thereby improving the axial installation accuracy of the rotor installed inside the housing and the coil sleeved outside the housing. In other words, it improves the coaxiality of the rotor inside the housing and the coil outside the housing, thus ensuring the driving force of the coil on the rotor. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 A cross-sectional structural schematic diagram of an embodiment of the electronic expansion valve provided by this utility model;

[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 for Figure 1 A partial structural schematic diagram of the provided electronic expansion valve;

[0025] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure;

[0026] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0027] Figure 6 for Figure 1 A first-view structural schematic diagram of the mounting hardware for the provided electronic expansion valve;

[0028] Figure 7 for Figure 1 A second-view structural schematic diagram of the mounting hardware for the provided electronic expansion valve;

[0029] Figure 8 for Figure 7 A cross-sectional view of the mounting components for the provided electronic expansion valve;

[0030] Figure 9 for Figure 1 A cross-sectional view of the connection seat of the provided electronic expansion valve;

[0031] Figure 10 for Figure 1 A first-view structural schematic diagram of the fixture for the provided electronic expansion valve;

[0032] Figure 11 for Figure 1 A second-view structural schematic diagram of the fixture for the provided electronic expansion valve.

[0033] Explanation of icon numbers:

[0034] 10. Electronic expansion valve; 100. Housing; 200. Connecting seat; 210. First mounting section; 220. Second mounting section; 230. Third mounting section; 240. First mounting end face; 250. Second mounting end face; 300. Mounting component; 310. Sleeve section; 320. Mounting flange; 321. Snap hole; 400. Coil; 410. Fixing component; 500. Rotor.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] The working principle of the electronic expansion valve is based on the principle of a permanent magnet stepper motor. It consists of a coil and a valve body. The coil is the stator and the valve body is the rotor. The valve body generally includes a connecting seat and a housing set on the connecting seat. The coil is sleeved on the outside of the housing. When the coil is energized, it generates excitation, which drives the rotor to rotate. This causes the rotor to move the valve needle up and down in a linear motion, thereby changing the cross-sectional area of ​​the valve port and achieving the function of flow regulation.

[0040] Currently, mounting components are typically installed on the outside of the housing and connector to fix the coil. However, these mounting components are prone to tilting during fixing, which can cause the coil to tilt after assembly. This leads to a misalignment between the coil and the rotor, ultimately resulting in insufficient driving force from the coil to the rotor.

[0041] To solve the above problems, this utility model proposes an electronic expansion valve 10.

[0042] Please see Figures 1 to 5 and Figure 9 In one embodiment of this utility model, the electronic expansion valve 10 includes a housing 100, a connecting seat 200, a mounting member 300, and a coil 400. The housing 100 has a mounting opening. The connecting seat 200 includes a first mounting section 210, a second mounting section 220, and a third mounting section 230 connected in sequence. The outer diameter of the first mounting section 210 is smaller than the outer diameter of the second mounting section 220, and the outer diameter of the second mounting section 220 is smaller than the outer diameter of the third mounting section 230, so that the second mounting section 220 is closer to the first mounting section 210 at one end. A first mounting end face 240 is formed, and a second mounting end face 250 is formed at the end of the third mounting section 230 near the second mounting section 220. The housing 100 is fitted onto the first mounting section 210 through a mounting opening, and the end face of the mounting opening abuts against the first mounting end face 240. The mounting member 300 is tightly fitted onto the outside of the second mounting section 220 and the housing 100, and the first end face of the mounting member 300 abuts against the second mounting end face 250. The coil 400 is fitted onto the outside of the housing 100 and abuts against the second end face of the mounting member 300.

[0043] The technical solution of this utility model involves fitting the housing 100 onto the first mounting section 210 through a mounting opening, with the end face of the mounting opening abutting against the first mounting end face 240. This prevents the housing 100 from tilting relative to the connecting seat 200, thereby improving the installation accuracy of the housing 100 in the axial direction of the connecting seat 200. Secondly, the end face of the mounting member 300 in this solution abuts against the second mounting end face 250. This also prevents the mounting member 300 from tilting relative to the connecting seat 200, thereby improving the installation accuracy of the mounting member 300 in the axial direction of the connecting seat 200. Since the coil 400 is sleeved on the outside of the housing 100 and abuts against the second end face of the mounting component, this design avoids the mounting component 300 from tilting relative to the connecting seat 200, and also avoids the coil 400 from tilting relative to the connecting seat 200. This improves the installation accuracy of the coil 400 in the axial direction of the connecting seat 200, ensuring that the housing 100 and the coil 400 are coaxial. This, in turn, improves the installation accuracy of the rotor 500 installed inside the housing 100 and the coil 400 sleeved outside the housing 100 in the axial direction. That is, it improves the coaxiality of the rotor 500 inside the housing 100 and the coil 400 outside the housing 100, thereby ensuring the driving force of the coil 400 on the rotor 500.

[0044] Optionally, in this embodiment, the first end face of the mounting member 300 is welded to the second mounting end face 250, which can further improve the installation stability of the mounting member 300, thereby improving the installation stability of the housing 100. Of course, this solution is not limited to this; the end face of the mounting member 300 can also be bonded to the second mounting end face 250.

[0045] Optionally, the first mounting section 210 is interference-fitted with the housing 100. It can be understood that the interference fit transmits the load through the friction force generated by compression. It is not easy to loosen under vibration, impact or high dynamic load, and has extremely high reliability. Therefore, using the interference fit to connect the first mounting section 210 and the housing 100 is beneficial to improving the installation stability of the first mounting section 210 and the housing 100. More importantly, the close contact between the first mounting section 210 and the housing 100 during assembly can ensure coaxiality and reduce eccentricity or shaking, thereby improving the installation accuracy of the housing 100.

[0046] Optionally, in this embodiment, the end face of the mounting opening is welded to the first mounting end face 240. Welding allows for direct connection between the housing 100 and the connecting seat 200, eliminating the need for bolts, rivets, or other auxiliary parts. This reduces the number of parts, lowers weight (lightweighting), and reduces cost, while simplifying the assembly process. Furthermore, welding improves the sealing of the connection point; more importantly, welding provides high connection strength, effectively enhancing the connection strength between the housing 100 and the connecting seat 200.

[0047] In this embodiment, the first mounting section 210 is interference-fitted with the housing 100, and then the end face of the mounting opening is welded to the end face of the first mounting section 210. This combines the advantages of interference fit and welding, while overcoming the limitations of a single process. Specifically, the interference fit fixes the position of the parts through preload, eliminating the need for additional clamps during welding and avoiding deformation caused by welding thermal stress. The interference fit provides initial mechanical fixation, while welding forms a metallurgical bond; the two combined create a dual load transfer path. The tensile and shear strengths are significantly higher than those of a single connection method. The tight contact of the interference fit reduces gaps, while welding completely seals the joint, forming a sealed structure. Of course, this solution is not limited to this; in other embodiments, the first mounting section 210 can also be inserted into the housing 100, and then the end face of the mounting opening can be welded to the end face of the first mounting section 210.

[0048] Optionally, the outer diameter of the housing 100 is equal to the outer diameter of the second mounting section 220. This simplifies the structure of the mounting member 300 and facilitates its tight fit on the outer side of the housing and the second mounting section 220. However, this solution is not limited to this. In other embodiments, the outer diameter of the housing 100 may not be equal to the outer diameter of the second mounting section 220, and the inner annular surface of the mounting member 300 may have different inner diameter fitting sections corresponding to the outer side of the housing 100 and the outer side of the second mounting section 220.

[0049] It should be noted that the outer diameter of the housing 100 is equal to the outer diameter of the second mounting section 220, meaning that when the housing 100 is mounted on the second mounting section 220, the outer diameter of the housing 100 is equal to the outer diameter of the second mounting section 220.

[0050] Reference Figures 5 to 8 Optionally, the mounting component 300 includes a connected sleeve section 310 and a mounting flange 320. The sleeve section 310 is sleeved on the outside of the second mounting section 220 and the housing 100, and a second end face is formed on the mounting flange 320. The mounting flange 320 can increase the stability of the coil abutting against the mounting component. Of course, this solution is not limited to this. In other embodiments, the mounting component 300 may also only include the sleeve section 310, which is sleeved on the outside of the second mounting section 220 and the housing 100, while the coil 400 directly abuts against the second end face of the sleeve section 310.

[0051] Reference Figure 1 , Figure 10 and Figure 11 Optionally, the coil 400 is provided with a fixing member 410, which is snap-fitted to the mounting flange 320. It can be understood that by providing the fixing member 410 and snap-fitting the mounting flange 320 to the coil 400, the coil 400 is fixed together with the mounting member 300, thus improving the stability of the coil 400 installation. Furthermore, the mounting flange 320 facilitates the snap-fitting connection between the mounting member 300 and the fixing member 410, and also prevents the snap-fit ​​structure from affecting the installation of the mounting member 300 with the second mounting section 220 and the housing 100. Of course, this solution is not limited to this; in other embodiments, the fixing member 410 can also be snap-fitted to the sleeve section 310.

[0052] Optionally, the mounting flange 320 is provided with a plurality of locking holes 321 along the circumference of the mounting flange 320, and the fastener 410 is fastened to one of the locking holes 321, which makes it convenient to adjust the position of the coil 400.

[0053] Furthermore, the locking hole 321 is an oblong hole extending in the radial direction of the mounting flange 320, which facilitates fine adjustment of the locking position of the fastener 410.

[0054] Furthermore, in this embodiment, the mounting flange 320 is provided with a locking notch, and the coil 400 is partially locked in the locking notch, which can further increase the installation stability of the coil 400.

[0055] Optionally, in this embodiment, the mounting member 300 is made of metal, which can improve its strength. However, this solution is not limited to this; in other embodiments, the mounting member 300 can also be made of plastic.

[0056] Furthermore, the mounting component 300 is integrally stamped. This is because the integral stamping production process is simple, and the produced parts have no welds or splices, resulting in a more uniform overall structure and reducing stress concentration problems caused by connections, which helps to improve the strength of the mounting component 300. Of course, this solution is not limited to this; in other embodiments, the mounting component 300 can also be welded.

[0057] Reference Figure 1 , Figure 10 and Figure 11 Furthermore, in this embodiment, the mounting component 300 is made of metal, and the fixing component 410 is also made of metal. This allows for electrical conduction when the fixing component 410 and the mounting component 300 are snapped together. This ensures that when the electrical signal inside the coil 400 becomes abnormal, turning into high voltage or ultra-high voltage, the high voltage or ultra-high voltage signal can be grounded through the fixing component 410 and the mounting component 300, and then through the system pipe connected to the connector 200, ultimately discharging the high voltage and preventing damage to the coil 400.

[0058] The coil 400 includes a coil body and a housing for housing the coil body. The housing includes a stator housing and a through-hole provided in the stator housing. The through-hole is used for the housing 100 to extend into, that is, the stator housing is fitted onto the housing 100 through the through-hole. The outer peripheral surface of the stator housing has a conductive contact surface. The fastener 410 includes a first connecting section and a second connecting section connected to each other. The side of the first connecting section facing the conductive contact surface is arc-shaped. The first connecting section has a weld joint, and the first connecting section is welded to the stator housing through the weld joint. The arc surface contacts the conductive contact surface. The second connecting section is snap-fitted to the mounting member 300.

[0059] Because the stator housing is cylindrical, its conductive contact surface is arc-shaped. By arranging the side of the first connecting section facing the conductive contact surface as an arc, the arc surface of the first connecting section can make close contact with the conductive contact surface of the stator housing, increasing the contact area between the stator housing and the first connecting section. This effectively improves the contact area between the fixing member 410 and the stator housing, ensuring reliable contact between the fixing member 410 and the stator housing. In this way, the contact resistance between the stator housing and the fixing member 410 can be reduced with the same volume of fixing member 410. This structure of the stator housing and fixing member 410 is simple and, compared to the later cutting of the outer circumference of the stator housing to make the conductive contact surface fit the contact plane of the first connecting section of the fixing member 410, the cost is lower.

[0060] Furthermore, this solution provides a welding joint on the first connecting section, which welds the first connecting section and the stator housing together. Compared to the prior art, which only welds the periphery of the fastener 410, this solution increases the connection strength between the first connecting section and the stator housing, thereby ensuring the long-term use of the electronic expansion valve 10 and that the coil is always grounded.

[0061] It should be noted that this solution not only welds the first connecting section and the stator housing together through the welding joint, but also welds the periphery of the fastener 410 to the stator housing.

[0062] Furthermore, the arc surface of the first connecting segment is formed by stamping. This is because stamping produces parts with stable and consistent quality, thin walls, light weight, high rigidity, and high surface quality. Using stamping can improve the quality of the first connecting segment. Secondly, stamping has high material utilization, is a low-waste and chip-free process, which reduces material waste and extends the mold life, thereby reducing the production cost of the fastener 410. Moreover, stamping has high production efficiency, which can improve the production efficiency of the fastener 410. Of course, this invention is not limited to this; in other embodiments, the arc surface of the first connecting segment can also be formed by post-machining.

[0063] Furthermore, in this embodiment, the weld joint is provided as a square through-hole. Of course, the present invention is not limited to this. In the second embodiment, the weld joint can also be provided as a notch.

[0064] This utility model also proposes an air conditioner, which includes an electronic expansion valve. The specific structure of the electronic expansion valve is as described in the above embodiments. Since this air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0065] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electronic expansion valve, characterized in that, include: A housing, wherein the housing is provided with an installation opening; A connecting base includes a first mounting section, a second mounting section, and a third mounting section connected in sequence. The outer diameter of the first mounting section is smaller than the outer diameter of the second mounting section, and the outer diameter of the second mounting section is smaller than the outer diameter of the third mounting section. A first mounting end face is formed at the end of the second mounting section near the first mounting section, and a second mounting end face is formed at the end of the third mounting section near the second mounting section. The housing is sleeved on the first mounting section through the mounting opening, and the end face of the mounting opening abuts against the first mounting end face. The mounting component is tightly fitted onto the outer side of the second mounting section and the housing, and the first end face of the mounting component abuts against the second mounting end face; and A coil is sleeved on the outside of the housing and abuts against the second end face of the mounting component.

2. The electronic expansion valve as described in claim 1, characterized in that, The mounting component includes a sleeve section and a mounting flange connected together. The sleeve section is sleeved on the outside of the second mounting section and the housing, and the second end face is formed on the mounting flange.

3. The electronic expansion valve as described in claim 2, characterized in that, The coil is provided with a fixing component, which is connected to the mounting flange buckle.

4. The electronic expansion valve as described in claim 3, characterized in that, The mounting flange is provided with a plurality of locking holes along its circumference, and the fastener engages with one of the locking holes.

5. The electronic expansion valve as described in claim 3, characterized in that, The mounting component is made of metal.

6. The electronic expansion valve as described in claim 5, characterized in that, The fastener is made of metal.

7. The electronic expansion valve according to any one of claims 1 to 6, characterized in that, The first end face of the mounting component is welded to the second mounting end face.

8. The electronic expansion valve as described in claim 7, characterized in that, The first mounting section is interference-fitted with the housing.

9. The electronic expansion valve according to any one of claims 1 to 6, characterized in that, The end face of the mounting opening is welded to the first mounting end face.

10. The electronic expansion valve as described in claim 9, characterized in that, The outer diameter of the housing is equal to the outer diameter of the second mounting section.

11. An air conditioner, characterized in that, Includes the electronic expansion valve as described in any one of claims 1 to 10.

Images