Coil assembly of electronic expansion valve, electronic expansion valve and air conditioner

Abstract

The invention discloses a coil assembly of an electronic expansion valve, the electronic expansion valve and an air conditioner, the coil assembly of the electronic expansion valve comprises a stator shell, a framework and a pole plate, and the stator shell is provided with a mounting cavity; the pole plate and the stator shell are arranged in a split mode, and the pole plate is installed on the framework and installed in the installation cavity. According to the technical scheme, the structures of the polar plate and the stator shell can be simpler, so that the production process difficulty of the polar plate and the stator shell is reduced, the defective rate of the polar plate and the stator shell is reduced, the yield of the polar plate and the stator shell is improved, and finally the purpose of reducing the production cost is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic expansion valves, and particularly relates to a coil assembly of an electronic expansion valve, an electronic expansion valve and an air conditioner. Background Art

[0002] The refrigeration system of an air conditioner or the like usually consists of a compressor, an evaporator and various regulating valve bodies. Among them, the electronic expansion valve is a key component for regulating the flow rate in the refrigeration system. The electronic expansion valve mainly consists of a coil assembly and a valve body assembly. Among them, the valve body part is equivalent to the rotor part of a stepper motor, and the coil is equivalent to the stator part of the stepper motor. By applying a pulsed drive signal to the coil winding, a regular magnetic field is generated on the magnetic pole claws of the coil's magnet conductor, driving the rotation of the rotor inside the valve body to adjust the flow rate at the valve port of the valve body, thereby realizing the control of the flow rate in the system.

[0003] However, the plate structure of the coil assembly on the current market is complex, and the defective rate is relatively high during the production process, resulting in a relatively large production cost. Summary of the Invention

[0004] The main purpose of the present invention is to provide a coil assembly of an electronic expansion valve, aiming to reduce the complexity of the plate structure of the coil assembly.

[0005] To achieve the above object, the coil assembly of the electronic expansion valve proposed by the present invention includes:

[0006] A stator housing, which is provided with an installation cavity;

[0007] A skeleton; and

[0008] A plate, the plate is separately arranged from the stator housing, the plate is installed on the skeleton and installed in the installation cavity.

[0009] Optionally, the plate includes two first plates and two second plates. The two first plates are respectively arranged at opposite ends in the axial direction of the skeleton, and the two second plates are arranged between the two first plates.

[0010] Optionally, the skeleton includes two sub-supports, the two sub-supports are coaxially stacked, and the two first plates are respectively arranged at one end of the two sub-supports away from each other, and the two second plates are respectively arranged at one end of the two sub-supports close to each other.

[0011] Optionally, each sub-support includes a frame body, a first support portion and a second support portion arranged at opposite ends in the axial direction of the frame body. The first pole seats of the two first plates are respectively arranged on the two first support portions, the second pole seats of the two second plates are respectively arranged on the two second support portions, and the two second support portions are arranged close to each other.

[0012] Optionally, a limiting portion is provided at an end of the stator housing, and the limiting portion contacts a side of a first pole seat of a first pole plate facing away from the second pole plate to limit the position of the first pole plate.

[0013] Optionally, the limiting portion is configured to be provided on an inward flange of the stator housing.

[0014] Optionally, an installation opening communicating with the installation cavity is provided at an end of the stator housing away from the limiting portion, and the pole plate and the skeleton are installed in the installation cavity through the installation opening.

[0015] Optionally, the thickness of the stator housing is less than or equal to the thickness of the pole plate.

[0016] Optionally, the pole plate is electrically connected to the stator housing.

[0017] The present invention also provides an electronic expansion valve, including the coil assembly of the above-mentioned electronic expansion valve.

[0018] Optionally, the electronic expansion valve further includes a valve body, and the coil assembly further includes a positioning member connected to the pole plate, and an end of the positioning member away from the pole plate is connected to an outer peripheral surface of the valve body.

[0019] The present invention also provides an air conditioner, including the above-mentioned electronic expansion valve.

[0020] The coil assembly of the above-mentioned electronic expansion valve has at least the following beneficial effects:

[0021] The technical solution of the present invention adopts a stator housing, a skeleton and a pole plate. The stator housing is provided with an installation cavity; the pole plate is separately provided from the stator housing, the pole plate is installed on the skeleton and installed in the installation cavity. Specifically, in this solution, the pole plate and the stator housing are separately provided, and the pole plate and the skeleton are installed in the installation cavity of the stator, so that the structures of the pole plate and the stator housing can be made simpler, thereby reducing the production process difficulty of the pole plate and the stator housing, further reducing the defective rate of the pole plate and the stator housing, improving the yield rate of the pole plate and the stator housing, and finally achieving the purpose of reducing production costs. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0023] Figure 1Schematic cross-sectional structure diagram of an embodiment of the electronic expansion valve of the present invention;

[0024] Figure 2 is Figure 1 Partial enlarged view of location A in

[0025] Figure 3 Schematic structure diagram of the stator housing of the coil assembly of the present invention;

[0026] Figure 4 Schematic structure diagram of the sub-bracket of the coil assembly of the present invention;

[0027] Figure 5 Schematic structure diagram of the first pole plate of the coil assembly of the present invention;

[0028] Figure 6 Schematic structure diagram of the second pole plate of the coil assembly of the present invention.

[0029] Explanation of the reference numerals in the drawings:

[0030] Label Name Label Name 100 Stator housing 300 Plate 110 Installation cavity 310 First plate 120 Inner flanging 311 First pole base 130 Installation opening 312 First pole claw 200 Skeleton 320 Second plate 210 Sub-bracket 321 Second pole base 211 Bracket body 322 Second pole claw 212 First support part 400 Positioning part 213 Second support part 500 Valve body

[0031] The realization of the object, functional features and advantages of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present invention, these descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The present invention provides a coil assembly for an electronic expansion valve.

[0037] Referring to Figure 1 and Figure 2 , in an embodiment of the present invention, the coil assembly of the electronic expansion valve includes a stator housing 100, a skeleton 200, and a pole plate 300. The stator housing 100 is provided with an installation cavity 110; the pole plate 300 is separately arranged from the stator housing 100, the pole plate 300 is installed on the skeleton 200, and is installed in the installation cavity 110.

[0038] Specifically, in this solution, the pole plate 300 and the stator housing 100 are separately arranged, and the pole plate 300 and the skeleton 200 are installed in the installation cavity 110 of the stator. Compared with the current solution on the market where the stator housing 100 and the pole plate 300 are integrally arranged, this solution can make the structures of the pole plate 300 and the stator housing 100 simpler, thereby reducing the production process difficulty of the pole plate 300 and the stator housing 100, further reducing the defective rate of the pole plate 300 and the stator housing 100, improving the qualified rate of the pole plate 300 and the stator housing 100, and ultimately achieving the purpose of reducing production costs.

[0039] Furthermore, the pole plate 300 includes two first pole plates 310 and two second pole plates 320; this can reduce the connection process difficulty between the pole plate 300 and the skeleton 200, and between the pole plate 300 and the stator housing 100, which is beneficial to improving the installation efficiency of the coil assembly.

[0040] Referring to Figure 2 and Figure 4, optionally, the skeleton 200 includes two sub - brackets 210 which are coaxially stacked, and the two first electrode plates 310 are respectively arranged at the two ends of the two sub - brackets 210 away from each other, and the two second electrode plates 320 are respectively arranged at the two ends of the two sub - brackets 210 close to each other. It can be understood that dividing the skeleton 200 into two coaxially stacked sub - brackets 210 facilitates the operator to install the second electrode plate 320 onto the sub - bracket 210, thereby reducing the installation difficulty of the electrode plate 300, being conducive to improving the installation efficiency and reducing the production cost. Of course, the present invention is not limited thereto. In other embodiments, the skeleton 200 can also be integrally arranged, directly arranging the two first electrode plates 310 at the opposite ends in the axial direction of the skeleton 200, and the two second electrode plates 320 are arranged between the two first electrode plates 310.

[0041] Optionally, each sub - bracket 210 includes a bracket body 211, a first support portion 212 and a second support portion 213 arranged at the opposite ends in the axial direction of the bracket body 211. The first pole seats 311 of the two first electrode plates 310 are respectively arranged on the two first support portions 212, and the second pole seats 321 of the two second electrode plates 320 are respectively arranged on the two second support portions 213. The two second support portions 213 are arranged close to each other so that the two second pole seats 321 are in contact. It can be understood that the arrangement of the first support portion 212 can increase the installation stability of the first pole seat 311 of the first electrode plate 310, and the second support portion 213 can increase the installation stability of the second pole seat 321 of the second electrode plate 320, thereby increasing the overall installation stability of the electrode plate 300.

[0042] In this embodiment, the first support portion 212 and the second support portion 213 are in a support ring shape, which can increase the support strength of the first support portion 212 and the second support portion 213.

[0043] The bracket body 211, the first support portion 212 and the second support portion 213 are integrally formed, which can increase the structural strength of the sub - bracket 210. Of course, the present invention is not limited thereto. In other embodiments, the bracket body 211, the first support portion 212 and the second support portion 213 can also be adhesively formed later.

[0044] In this embodiment, the sub - bracket 210 and a first electrode plate 310 and a second electrode plate 320 are formed by secondary injection molding, which can save the installation process of the first electrode plate 310 and a second electrode plate 320 and improve the production efficiency of the coil assembly. Moreover, using the secondary injection molding process to produce the sub - bracket 210 can make the strength of the sub - bracket 210 more uniform and stable, improving the product quality.

[0045] It should be noted that both of the first pole seats 311 are arranged on the side of the first support portion 212 facing away from the other first support portion 212. In this way, the first support portion 212 can limit the displacement of the first pole seat 311 of the first electrode plate 310 in the axial direction of the framework 200 towards the second support portion 213, thereby increasing the installation stability of the first electrode plate 310. Both of the second pole seats 321 are arranged on the side of the second support portion 213 facing away from the other second support portion 213, and the two second pole seats 321 are in contact with each other. In this way, the displacement of the second pole seat 321 in the axial direction of the framework 200 can be limited, thereby increasing the installation stability of the second electrode plate 320.

[0046] Referring to Figure 5 and Figure 6 Furthermore, the electrode plate 300 includes a pole seat and a plurality of pole claws surrounding the pole seat, so as to form a valve body channel surrounded between the plurality of pole claws. The valve body channel is used for the valve body 500 of the electronic expansion valve to pass through, and the pole claws are in contact with the outer peripheral surface of the valve body 500.

[0047] Furthermore, the frame body 211 of the sub-support 210 is provided with an embedding groove corresponding to each pole claw. The pole seat is connected to the sub-support 210, and the pole claw is embedded in the embedding groove. In this way, the sum of the wall thicknesses of the pole claw and the frame body 211 can be reduced, thereby enhancing the electromagnetic force of the coil assembly.

[0048] Specifically, both of the first electrode plates 310 include a first pole seat 311 and a plurality of first pole claws 312 surrounding the first pole seat 311; both of the first electrode plates 310 include a second pole seat 321 and a plurality of second pole claws 322 surrounding the second pole seat 321. The frame body 211 of the sub-support 210 is provided with an embedding groove corresponding to each first pole claw 312 and each second pole claw 322.

[0049] Moreover, the first pole seat 311 of one first electrode plate 310 and the second pole seat 321 of one second electrode plate 320 are respectively arranged at opposite ends of a sub-support 210, and the other first electrode plate 310 and the other second electrode plate 320 are respectively arranged at opposite ends of another sub-support 210. The first pole claws 312 of the first electrode plate 310 extend towards the second electrode plate 320 arranged on the same sub-support 210, and the second pole claws 322 of the second electrode plate 320 extend towards the first electrode plate 310 arranged on the same sub-support 210.

[0050] Furthermore, the first pole base 311 and the first pole claw 312 are integrally formed by stamping, and the second pole base 321 and the second pole claw 322 are integrally formed by stamping. This is because the parts processed by integral stamping have stable quality and good consistency. The parts processed by stamping have thin walls, light weight, good rigidity and high surface quality. Using stamping can improve the quality of the first pole base 311 and the first pole claw 312 of the stator. Secondly, the material utilization rate of stamping is high, which belongs to less or non-chip processing, can reduce material waste, and the die has a long service life, thus reducing the production cost of the first pole base 311 and the first pole claw 312. Furthermore, the production efficiency of stamping is high, which can improve the production efficiency of the first pole base 311 and the first pole claw 312.

[0051] Refer to 2 and Figure 3 Optionally, a limiting portion is provided at the end of the stator housing 100. The limiting portion contacts the side of the first pole base 311 of a first pole plate 310 facing away from the second pole plate 320 to limit the position of the first pole plate 310. Specifically, the first pole bases 311 of the two first pole plates 310 are both provided on the side of the first support portion 212 facing away from the other first support portion 212, and the side of one of the first pole bases 311 facing away from the first support portion 212 is in contact with the limiting portion. Thus, the displacement of the first pole plate 310 in the axial direction of the skeleton 200 is jointly limited by the limiting portion and the first support portion 212, thereby increasing the installation stability of the first pole plate 310 in contact with the limiting portion. Of course, the present invention is not limited thereto. In other embodiments, a limiting portion may be provided at each of the two end portions of the stator housing 100, and the two first pole bases 311 are respectively in contact with a limiting portion, thereby increasing the installation stability of the first pole plate 310.

[0052] Wherein, the first support portion 212, the second support portion 213 and the frame body 211 enclose a cavity, and the windings of the coil assembly are wound in the cavity of the skeleton 200.

[0053] It should be noted that one of the first pole plates 310 is directly abutted between the limiting portion and the first support portion 212. Such an installation process is simple and does not require fasteners. This can not only reduce the installation cost, but also be beneficial to improving the installation efficiency. The first pole base 311 of the other first pole plate 310 is directly fixed on the first support portion 212.

[0054] In the second embodiment, the first pole plate 310 and the second pole plate 320 can also be respectively fixedly installed on the first support portion 212 and the second support portion 213 of the skeleton 200 and then integrally installed into the installation cavity 110.

[0055] Furthermore, the limiting portion is configured to be provided on the inward flange 120 of the stator housing 100. Such a limiting portion has a simple structure and is easy to form, which can reduce the forming process of the limiting portion. Of course, the present invention is not limited thereto. In other embodiments, the limiting portion may also be a plurality of spaced limiting protrusions extending inward.

[0056] Among them, the inward flange 120 and the stator housing 100 are integrally formed by stamping. This is because the parts processed by integral stamping have stable quality and good consistency. The parts processed by stamping have thin walls, light weight, good rigidity and high surface quality. Using stamping can improve the quality of the stator housing 100. Secondly, the material utilization rate of stamping is high, which belongs to less or no-chip processing, can reduce material waste, and the die has a long service life, thereby reducing the production cost of the stator housing 100. Moreover, the production efficiency of stamping is high, which can improve the production efficiency of the stator housing 100.

[0057] Optionally, an installation opening 130 communicating with the installation cavity 110 is provided at one end of the stator housing 100 away from the limiting portion. The pole plate 300 and the skeleton 200 are installed in the installation cavity 110 through the installation opening, which is convenient for installing the skeleton 200 and the pole plate into the installation cavity 110 and is beneficial to improving the installation efficiency of the coil assembly. Of course, the present invention is not limited thereto. In other embodiments, the stator housing 100 may also be provided in a split manner. The stator housing 100 includes a first shell portion and a second shell portion that are mutually covered. First, the pole plate 300 and the skeleton 200 are installed in the installation cavity 110, and then the first shell portion and the second shell portion are covered.

[0058] Optionally, the thickness of the stator housing 100 is less than or equal to the thickness of the pole plate 300, which can reduce the mass of the coil assembly while ensuring the strength of the stator housing 100.

[0059] Optionally, the pole plate 300 is electrically connected to the stator housing 100. Specifically, the side edge of the pole plate contacts the cavity wall of the installation cavity 110 of the stator housing 100, thereby realizing the electrical connection between the pole plate and the stator housing 100. Such an electrical connection method is simple, and the electrical connection between the pole plate 300 and the stator housing 100 can be completed when installing the pole plate 300, which is beneficial to improving the installation efficiency of the coil assembly.

[0060] Refer to Figure 1 and Figure 2 , the present invention also proposes an electronic expansion valve, including the coil assembly of the above-mentioned electronic expansion valve.

[0061] Furthermore, the electronic expansion valve further includes a valve body 500, and the coil assembly further includes a positioning member 400 connected to the electrode plate 300. One end of the positioning member 400 away from the electrode plate 300 is connected to the outer peripheral surface of the valve body 500. Specifically, the valve body 500 is disposed through the valve body passage of the coil assembly, and both ends of the positioning member 400 are respectively connected to the outer peripheral surface of the valve body 500 and the electrode plate 300 to achieve electrical conduction, so that the internal structure of the coil assembly is grounded.

[0062] In this embodiment, the positioning member 400 is welded to the stator housing 100. It can be understood that the welded interface is firm and durable, not easily leaking, with high joint strength and tightness. The high weld strength can ensure the reliability of the connection between the positioning member 400 and the stator housing 100, and the high welding production efficiency can improve the installation efficiency of the positioning member 400.

[0063] The present invention also provides an air conditioner, which includes an electronic expansion valve. The specific structure of the electronic expansion valve refers to the above embodiments. Since this air conditioner adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0064] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A coil assembly of an electronic expansion valve, characterized in that, include: A stator housing, wherein the stator housing is provided with a mounting cavity; skeleton; as well as A pole plate is provided separately from the stator housing, and the pole plate is installed on the frame and in the installation cavity.

2. The coil assembly of the electronic expansion valve according to claim 1, characterized in that, The electrode plates include two first electrode plates and two second electrode plates. The two first electrode plates are disposed at opposite ends of the frame in the axial direction, and the two second electrode plates are disposed between the two first electrode plates.

3. The coil assembly of the electronic expansion valve according to claim 2, characterized in that, The skeleton comprises two sub-supports, the two sub-supports are coaxially stacked, and the two first pole plates are respectively arranged at ends of the two sub-supports away from each other, and the two second pole plates are respectively arranged at ends of the two sub-supports close to each other.

4. The coil assembly of the electronic expansion valve according to claim 3, characterized in that, Each of the sub-brackets includes a frame body, a first support portion and a second support portion arranged at opposite ends of the frame body in the axial direction, the first pole seats of the two first pole plates are respectively arranged on the two first support portions, the second pole seats of the two second pole plates are respectively arranged on the two second support portions, and the two second support portions are arranged close to each other.

5. The coil assembly of the electronic expansion valve according to claim 4, characterized in that, A limiting portion is disposed at the end of the stator housing, and the limiting portion contacts a side of a first pole seat of the first pole plate that is away from the second pole plate, so as to limit the position of the first pole plate.

6. The coil assembly of the electronic expansion valve according to claim 5, characterized in that, The limiting portion is configured to be arranged on the inner flange of the stator housing.

7. The coil assembly of the electronic expansion valve according to claim 5, characterized in that, An installation opening communicating with the installation cavity is provided at one end of the stator housing away from the limiting portion, and the pole plate and the frame are installed in the installation cavity through the installation opening.

8. The coil assembly of the electronic expansion valve according to any one of claims 1 to 7, characterized in that, The thickness of the stator housing is less than or equal to the thickness of the pole plate.

9. The coil assembly of the electronic expansion valve according to any one of claims 1 to 7, characterized in that, The pole plate is conductively connected to the stator housing.

10. An electronic expansion valve, characterized in that, A coil assembly comprising an electronic expansion valve as claimed in any one of claims 1 to 9.

11. The electronic expansion valve according to claim 10, wherein, The electronic expansion valve further includes a valve body, and the coil assembly further includes a positioning member connected to the pole plate, wherein one end of the positioning member away from the pole plate is connected to the outer peripheral surface of the valve body.

12. An air conditioner, characterized in that, Comprising the electronic expansion valve as claimed in claim 10 or 11.

Images