Coil assembly and electronic expansion valve with same

Abstract

The utility model provides a coil assembly and an electronic expansion valve with the same, the coil assembly comprises a stator assembly, the stator assembly comprises a stator housing and a winding, the winding is arranged in the stator housing, and the stator housing is made of conductive material and magnetic conductive material; the wiring terminal is partially located on the outer side of the stator shell, and the wiring terminal is electrically connected with the winding; the wire harness comprises a shielding layer and a wire, one end of the wire is electrically connected with the wiring terminal, the other end of the wire is used for being electrically connected with wiring equipment, the shielding layer wraps the outer side of the wire and is provided with a conductive material, the end, close to the wiring terminal, of the shielding layer is a connecting end, the connecting end is electrically connected with the stator shell, and the shielding layer can be grounded. According to the technical scheme of the utility model, the problem of poor anti-electromagnetic interference capability of the coil assembly in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic expansion valves, in particular to a coil component and an electronic expansion valve having the same. Background Art

[0002] As a precise flow control device, the electronic expansion valve plays a vital role in today's refrigeration and air conditioning systems. It adjusts the flow of refrigerant to achieve precise control of indoor temperature. The coil is one of the core components that drives the electronic expansion valve. When the coil is connected to an external power source through a wire, a magnetic field is generated. Under the action of the magnetic field, the rotor drives the valve to open or close.

[0003] After the coil with wires is energized, electromagnetic interference will be generated or received at the coil body or the wires, which will affect the normal operation of the electronic expansion valve, resulting in inaccurate flow control, thereby reducing the stability of the entire refrigeration system; or generate electromagnetic interference to other components around the coil, affecting the normal use of other components. Utility Model Content

[0004] The utility model provides a coil component and an electronic expansion valve having the same, so as to solve the problem that the anti-electromagnetic interference capability of the coil component in the prior art is poor.

[0005] According to one aspect of the utility model, a coil assembly is provided, which includes: a stator assembly, the stator assembly includes a stator housing and a winding, the winding is located in the stator housing, and the stator housing is made of conductive material and magnetic material; a terminal, partly located on the outside of the stator housing, the terminal is electrically connected to the winding; a wiring harness, including a shielding layer and a wire, one end of the wire is electrically connected to the terminal, and the other end of the wire is used to be electrically connected to a wiring device, the shielding layer is wrapped around the outside of the wire, the shielding layer has a conductive material, and the end of the shielding layer close to the terminal is a connection end, the connection end is electrically connected to the stator housing, and the shielding layer can be grounded.

[0006] By applying the technical solution of the utility model, a conductive material is wrapped around the outside of the wire to form a shielding layer. The conductive material can reflect and absorb electromagnetic waves and electromagnetic energy generated by the outside world, and can also reduce the divergence of electromagnetic waves generated inside the wire to the outside environment. The shielding layer formed in this way can enhance the anti-electromagnetic interference capability of the wire while reducing the electromagnetic interference of the wire to the surrounding environment, thereby reducing the electromagnetic interference generated by the coil assembly to other surrounding components. At the same time, the connecting end of the shielding layer is electrically connected to the stator housing, and the shielding layer can be grounded, so that the static electricity or electromagnetic interference current outside the stator housing or the wire can be quickly guided to the ground through the shielding layer, avoiding the occurrence of electrical accidents, making the coil assembly less susceptible to the influence of the electromagnetic environment, enhancing the anti-electromagnetic interference capability of the coil assembly, and thus ensuring that the device can operate safely and stably.

[0007] Furthermore, the coil assembly also includes a grounding plate, one end of which is electrically connected to the stator housing, the other end of which is used for grounding, and the connecting end is electrically connected to the grounding plate. Through the above arrangement, the anti-electromagnetic interference capability of the coil assembly can be further improved, and the electromagnetic interference generated by the coil assembly to surrounding components can be reduced.

[0008] Furthermore, a wire fixing structure is provided on the grounding plate and / or the stator housing, and the wire fixing structure can fix the relative position of the connection end and the grounding plate and / or the stator housing. Through the above arrangement, poor contact or disconnection between the connection end and the grounding plate can be avoided, and the stability of the connection between the shielding layer and the grounding plate can be improved.

[0009] Furthermore, the wire fixing structure includes a clamping spring piece, which is arranged on the grounding plate, and is used to clamp the connection end on the grounding plate. The wire fixing structure and the grounding plate are arranged together, so that the space volume of the wire fixing structure and the grounding plate can be reduced to avoid interference with other components. At the same time, the structure of the clamping spring piece is simple, which is easy to process and produce, and greatly simplifies the operation steps of connecting and fixing the connection end to the grounding plate, thereby improving the applicability of the coil assembly.

[0010] Furthermore, the grounding piece has a first connecting section and a second connecting section, the first connecting section is connected to the stator housing, the second connecting section is used for grounding, one end of the first connecting section connected to the stator housing has a notch, one end of the clamping spring is located in the notch and connected to the first connecting section, the extension direction of the clamping spring has an angle with the extension direction of the first connecting section, and the connecting end is sandwiched between the clamping spring and the first connecting section. Through the above arrangement, the operation is very convenient, the structure is simple, and the connecting end can be well fixed.

[0011] Furthermore, the grounding sheet and the clamping spring sheet are an integrated structure. Through the above arrangement, the structural strength of the grounding sheet and the stability of the connection between the grounding sheet and the clamping spring sheet can be improved.

[0012] Furthermore, extensions are provided on both sides of the first connecting section, and the extensions are used to connect to the stator housing. Through the above arrangement, the grounding plate is connected to the stator housing through the extensions, which increases the contact area at the connection between the grounding plate and the stator housing, thereby improving the connection strength between the grounding plate and the stator housing.

[0013] Furthermore, the coil assembly also includes a conductive portion, which is respectively connected to the grounding plate and the connecting end, and the connecting end is electrically connected to the grounding plate through the conductive portion. Through the above arrangement, it can be ensured that the electrical connection between the connecting end and the grounding plate is more stable and reliable, thereby improving the anti-electromagnetic interference capability of the wire and improving the safety of the circuit.

[0014] Furthermore, the coil assembly has an encapsulation layer, which covers the winding and at least a portion of the terminal, and a fixing portion is provided on one side of the encapsulation layer close to the grounding plate, and the fixing portion is used to fix the relative position of the conductive portion and the grounding plate. Through the above arrangement, the position of the conductive portion can be fixed, ensuring the reliability of the contact between the conductive portion and the grounding plate, thereby ensuring that the interference current can be smoothly conducted.

[0015] Furthermore, the fixing part includes: a limiting groove, which is arranged on the side wall of the encapsulation layer, and one end of the conductive part is inserted into the limiting groove; or a limiting protrusion, which is arranged on the side wall of the encapsulation layer, and one end of the conductive part is located between the limiting protrusion and the grounding sheet, and the limiting protrusion is used to make the conductive part abut against the grounding sheet. Through the above arrangement, the tightness of the assembly of the conductive part and the fixing part can be ensured.

[0016] According to another aspect of the utility model, an electronic expansion valve is provided, the electronic expansion valve comprising the above-mentioned coil assembly. By arranging the above-mentioned coil assembly in the electronic expansion valve, static electricity or electromagnetic interference current outside the wire can be quickly guided to the ground, avoiding the occurrence of electrical accidents, thereby improving the reliability and safety of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A front view of a coil assembly provided by the first embodiment of the utility model is shown;

[0019] Figure 2 Shows Figure 1 Sectional view at AA in the middle;

[0020] Figure 3 A radial cross-sectional view of a wiring harness provided by a first embodiment of the utility model is shown;

[0021] Figure 4 Shows Figure 3 Sectional view at EE in the middle;

[0022] Figure 5 A schematic diagram of the structure of a grounding plate provided in the first embodiment of the utility model is shown;

[0023] Figure 6 A side view of a grounding sheet provided in a first embodiment of the utility model is shown;

[0024] Figure 7 A front view of a coil assembly provided by a second embodiment of the utility model is shown;

[0025] Figure 8 Shows Figure 7 Cross-section at the middle BB;

[0026] Fig. 9 A bottom view of a coil assembly provided in a third embodiment of the present utility model is shown;

[0027] Fig.10 Shows Fig. 9 Sectional view at DD in the middle;

[0028] Fig.11 A bottom view of a coil assembly provided in a fourth embodiment of the present utility model is shown;

[0029] Fig.12 Shows Fig.11 Cross-section view at CC.

[0030] The above drawings include the following reference numerals:

[0031] 10. stator assembly; 11. stator housing; 12. winding;

[0032] 20. Terminal blocks;

[0033] 30. grounding plate; 301. snap-on spring; 302. notch; 303. extension portion; 31. first connecting section; 32. second connecting section;

[0034] 40. Wire harness; 41. Shielding layer; 411. Connecting end; 42. Wire; 43. Circuit board; 44. Insulating layer; 45. Braided layer; 46. Sheath;

[0035] 50. Conductive part;

[0036] 60. Encapsulation layer;

[0037] 70. Fixed part. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0039] like Figure 1 and Figure 2 As shown, the first embodiment of the utility model provides a coil assembly, which includes: a stator assembly 10, a terminal 20, a grounding plate 30 and a wiring harness 40. Among them, the stator assembly 10 includes a stator housing 11 and a winding 12, and the winding 12 is located in the stator housing 11, and the stator housing 11 is made of conductive and magnetic materials. Part of the terminal 20 is located outside the stator housing 11, and the terminal 20 is electrically connected to the winding 12. One end of the grounding plate 30 is connected to the stator housing 11.

[0040] The wiring harness 40 includes a shielding layer 41 and a wire 42, one end of the wire 42 is connected to the terminal 20, and the other end of the wire 42 is used to connect to the wiring device. The shielding layer 41 is wrapped around the outside of the wire 42, and the shielding layer 41 has a conductive material. The end of the shielding layer 41 close to the terminal 20 is a connecting end 411, and the connecting end 411 is electrically connected to the stator housing 11. The shielding layer 41 can be grounded, and the interference current at the wire is derived by wrapping the conductive shielding layer 41 outside the wire 42. The shielding layer 41 can be electrically connected to the grounding terminal of the wiring device to achieve grounding. The connecting end 411 can be directly welded to the stator housing 11, or the connecting end 411 can also be electrically connected to the stator housing 11 through a connector.

[0041] Specifically, the shielding layer 41 can be wrapped around the outside of multiple wires 42, or can wrap a single wire 42 separately. Wrapping a single wire 42 can make the shielding layers 41 conductive to each other. Regardless of whether the shielding layer 41 wraps multiple wires 42 or wraps a single wire 42 separately while being conductive to each other, since the shielding layer 41 has conductive material and can be grounded, the shielding layer can conduct the interference current at the wire 42.

[0042] By applying the technical solution of the utility model, a conductive material is wrapped around the outside of the wire 42 to form a shielding layer 41. The conductive material can reflect and absorb electromagnetic waves and electromagnetic energy generated by the outside world, and can also reduce the divergence of electromagnetic waves generated inside the wire 42 to the outside environment. The shielding layer 41 formed in this way can enhance the anti-electromagnetic interference capability of the wire 42 while reducing the electromagnetic interference of the wire 42 to the surrounding environment, thereby reducing the electromagnetic interference generated by the coil assembly to other surrounding components. At the same time, the connection end 411 of the shielding layer 41 is electrically connected to the stator housing 11, and the shielding layer 41 can be grounded. In this way, the static electricity or electromagnetic interference current outside the stator housing 11 or the wire 42 can be quickly guided to the ground through the other end of the shielding layer 41, thereby avoiding the occurrence of electrical accidents, making the coil assembly less susceptible to the influence of the electromagnetic environment, enhancing the anti-electromagnetic interference capability of the coil assembly, and thereby ensuring that the device can operate safely and stably. Figure 3 and Figure 4 As shown, an insulating layer 44 is provided on the outside of the wire 42, and an insulating layer 44 can also be provided on the outside of the shielding layer 41 near the connection end 411 that is not in contact with the wire 42 to improve the overall safety of the wiring harness 40. The shielding layer 41 wraps the part of the wire 42, and a braided layer 45 is also provided on the outer periphery. The braided layer 45 is used to wrap the shielding layer 41 to enhance the wear resistance and bending resistance of the wiring harness 40. A sheath 46 is also provided on the outside of the braided layer 45 to protect the internal wire 42 and other components to avoid damage or breakage of the wiring harness 40 due to excessive friction.

[0043] Specifically, the shielding layer 41 can be made of metal material, and the shielding layer 41 is composed of at least one metal mesh braided layer. The connecting end 411 is twisted by a conductive material, which is convenient for fixing the position of the connecting end 411 and connecting the connecting end 411 to the grounding plate 30. The wiring terminal 20 and the wire 42 are both plugged into the circuit board 43, and the electrical connection is achieved through the conductive path on the circuit board 43.

[0044] In the present application, there is no limitation on the electrical connection form between the terminal block 20 and the wire 42 . The terminal block 20 and the wire 42 may also be electrically connected by welding or riveting of metal terminals.

[0045] Furthermore, the coil assembly also includes a grounding plate 30, one end of which is electrically connected to the stator housing 11, the other end of which is used for grounding, and the connecting end 411 is electrically connected to the grounding plate 30. Through the above arrangement, the stator housing 11 can be grounded through the grounding plate 30; or, the stator housing 11 can be grounded through the shielding layer 41 and can also be grounded through the grounding plate 30; since the shielding layer 41 is electrically connected to the grounding plate 30 and the other end is grounded, the interference current at the wire 42 can be derived through the grounding plate 30 or through the shielding layer 41, so that the anti-electromagnetic interference capability of the coil assembly can be further improved, and the electromagnetic interference generated by the coil assembly to the surrounding components can be reduced, and the selection can be made according to the actual assembly difficulty and the connection requirements between the components.

[0046] In the present application, the grounding method of the grounding plate 30 is not limited. In this embodiment, the grounding plate 30 is electrically connected to the fixing frame, and the fixing frame is electrically connected to the valve body, so that the stator housing 11 can be grounded through the system pipeline connected to the valve body.

[0047] In the present application, a fixed wire structure is provided on the grounding plate 30, and the fixed wire structure can fix the relative position of the connection end 411 and the grounding plate 30. Through the above arrangement, the relative displacement between the connection end 411 and the grounding plate 30 can be reduced, the poor contact or disconnection between the connection end 411 and the grounding plate 30 can be avoided, the stability of the connection between the shielding layer 41 and the grounding plate 30 can be improved, and it is ensured that the connection end 411 can timely conduct the induced current on the wire 42 to the ground, ensuring the smooth operation of the device.

[0048] The specific location of the fixed wire structure is not limited in the present application, as long as the connection end 411 of the shielding layer 41 and the grounding plate 30 can be stably connected. In other embodiments of the present application, the fixed wire structure can be set on the stator housing 11; or the fixed wire structure can be set on both the grounding plate 30 and the stator housing 11, so that the stability of the connection between the shielding layer 41 and the grounding plate 30 can be further improved.

[0049] like Figure 5 and Figure 6 As shown, the wire fixing structure includes a clamping spring piece 301, which is arranged on the grounding plate 30, and the clamping spring piece 301 is used to clamp the connection end 411 on the grounding plate 30. The wire fixing structure and the grounding plate 30 are arranged together, so that the space volume of the wire fixing structure and the grounding plate 30 can be reduced, and interference with other structures can be avoided, and disassembly and maintenance are convenient and fast. At the same time, the structure of the clamping spring piece 301 is simple, which is convenient for processing and production, and greatly simplifies the operation steps of connecting and fixing the connection end 411 and the grounding plate 30, thereby improving the applicability of the coil assembly.

[0050] In other embodiments of the present application, the connection end 411 can also be plugged into the fixed line structure to fix the position of the connection end 411. Specifically, the fixed line structure can also be set as a shell structure with a through hole, and the connection end 411 can be inserted into the through hole. The fixed line structure also includes an elastic clip, which is set on the shell and at least partially set in the through hole. The elastic clip has a fixed end and an operating end. The fixed end of the elastic clip is located in the through hole. When the connection end 411 needs to be fixed, the operating end is driven to drive the fixed end to move so that the connection end 411 can be smoothly inserted into the through hole. Then, the operating end is released to switch the elastic clip to a clamping state to fix the position of the connection end 411 in the through hole to avoid relative displacement between the connection end 411 and the grounding plate 30.

[0051] Furthermore, the grounding plate 30 has a first connecting section 31 and a second connecting section 32, the first connecting section 31 is connected to the stator housing 11, and the second connecting section 32 is used for grounding. One end of the first connecting section 31 connected to the stator housing 11 has a notch 302, one end of the snap-fit ​​spring piece 301 is located in the notch 302 and is connected to the first connecting section 31, the extension direction of the snap-fit ​​spring piece 301 and the extension direction of the first connecting section 31 have an angle, and the connecting end 411 is clamped between the snap-fit ​​spring piece 301 and the first connecting section 31.

[0052] When the connection end 411 of the shielding layer 41 needs to be connected to the grounding plate 30, the connection end 411 is passed through the gap between the clamping spring piece 301 and the first connection section 31, and then after adjusting the placement position of the connection end 411, the clamping spring piece 301 is embedded in the notch 302 by a tool, and then the connection end 411 is fixed between the clamping spring piece 301 and the first connection section 31, so that the fixed connection end 411 is in contact with and conductive to at least one of the grounding plate 30 and the stator housing 11. The above design is very convenient to operate and has a simple structure, and can well fix the connection end 411.

[0053] In the present application, the angle between the extending direction of the snap-on spring piece 301 and the extending direction of the first connecting section 31 is not limited, and preferably, it can be set between 0° and 90°. If it is greater than 90°, the snap-on spring piece 301 will be easily broken due to the large angle between the snap-on spring piece 301 and the first connecting section 31, and the structural strength is low. Specifically, the angle between the extending direction of the snap-on spring piece 301 and the extending direction of the first connecting section 31 can be set to 10°, 45°, 60° or 88°.

[0054] Among them, the grounding plate 30 and the snap-on spring 301 are an integral structure. Through the above-mentioned arrangement, it is avoided that the welding process will produce welds that cause the connection between the snap-on spring 301 and the grounding plate 30 to be low in strength or easy to break. At the same time, there is no need to set a mounting hole for fixing the snap-on spring 301 on the grounding plate 30, so that the structural strength of the grounding plate 30 and the stability of the connection between the grounding plate 30 and the snap-on spring 301 can be improved. At the same time, the grounding plate 30 and the snap-on spring 301 adopt an integrated molding process, which can save production time and cost. The width of the snap-on spring 301 is not limited in this application. In this embodiment, the width of the snap-on spring 301 is less than the width of the notch 302, which is convenient for direct stamping using existing molds, saving production costs. In other embodiments of the present application, it can be the same as the width of the notch 302, or greater than the width of the notch 302.

[0055] In other embodiments of the present application, the snap-on spring clip 301 and the grounding plate 30 may also be a split structure, which makes it convenient to repair and replace the snap-on spring clip 301. Different grounding plates 30 and snap-on spring clips 301 can be replaced according to the coil assembly structure, type and working requirements. At the same time, the manufacturing process of the snap-on spring clip 301 and the grounding plate 30 can be simplified.

[0056] Furthermore, extensions 303 are provided on both sides of the first connection section 31, and the extensions 303 are used to connect and conduct with the stator housing 11. This ensures that the extensions 303 are closely fitted with the stator housing 11, improves the smoothness of current flow, and further improves the stability of the connection between the grounding plate 30 and the stator housing 11.

[0057] like Figure 7 and Figure 8 As shown, the second embodiment of the utility model provides a coil assembly, which is different from the first embodiment in that the coil assembly also includes a conductive portion 50, and the conductive portion 50 is connected to the grounding plate 30 and the connecting end 411 respectively, and the connecting end 411 is electrically connected to the grounding plate 30 through the conductive portion 50. By arranging the conductive portion 50 between the grounding plate 30 and the connecting end 411, it can be ensured that the electrical connection between the connecting end 411 and the grounding plate 30 is more stable and reliable, thereby improving the anti-electromagnetic interference capability of the wire 42 and improving the safety of the circuit. At the same time, the provision of the conductive portion 50 can also prevent the connecting end 411 from loosening or poor contact due to external force when connected to the grounding plate 30, further improving the grounding effect.

[0058] Specifically, the conductive part 50 can be set as a conductive terminal, a metal sheet or other conductive structure. When the conductive part 50 is set as a conductive terminal, the connecting end 411 is connected to the conductive part 50 by riveting; when the conductive part 50 is set as a metal sheet, the connecting end 411 can be fixedly connected to the conductive part 50 by welding. In the present application, the specific structure of the conductive part 50 is not limited, and it can be set as a planar structure or a structure with a through hole. The connecting end 411 can also be electrically connected to the conductive part 50 through a snap-on structure.

[0059] Specifically, the coil assembly also has an encapsulation layer 60, which covers the winding 12 in the stator housing 11 and at least a portion of the terminal block, and can play an insulating role. A fixing portion 70 is provided on one side of the encapsulation layer 60 close to the grounding plate 30, and the fixing portion 70 is used to fix the relative position of the conductive portion 50 and the grounding plate 30. By setting the fixing portion 70, the position of the conductive portion 50 can be fixed to prevent the conductive portion 50 from vibrating when subjected to external force and causing displacement with the grounding plate 30, thereby ensuring the reliability of the contact between the conductive portion 50 and the grounding plate 30, and further ensuring that the interference current can be smoothly conducted.

[0060] like Fig. 9 and Fig.10 As shown, in the third embodiment provided in the present application, the fixing part 70 can be configured as a limiting groove, which is disposed on the side wall of the encapsulation layer 60, and one end of the conductive part 50 is inserted into the limiting groove. The conductive part 50 and the limiting groove are tightly fitted, and after the conductive part 50 is inserted into the limiting groove, it can contact with the grounding plate 30 and realize electrical connection, so that the tightness of the assembly of the conductive part 50 and the fixing part 70 can be ensured, and the conductive part 50 can be conductive with the grounding plate 30.

[0061] like Fig.11 and Fig.12 As shown, in the fourth embodiment provided by the present application, the fixing part 70 can also be set as a limiting protrusion, the limiting protrusion is set on the side wall of the encapsulation layer 60, one end of the conductive part 50 is located between the limiting protrusion and the grounding plate 30, the limiting protrusion is used to make the conductive part 50 abut against the grounding plate 30, and the conductive part 50 is tightly fitted between the grounding plate 30 and the limiting protrusion. Through the above arrangement, the structure of the fixing part 70 is simple and easy to process, and the conductive part 50 is fixed between the encapsulation layer 60 and the grounding plate 30 by tight fitting, so as to facilitate the installation and disassembly of the conductive part 50 and the adjustment of the position, so as to ensure the reliability of the connection between the conductive part 50 and the grounding plate 30.

[0062] In the present application, the conductive part 50 is in contact with and conductive to the grounding plate 30, thereby realizing electrical connection between the connection end 411 and the grounding plate 30. The relative position of the conductive part 50 and the grounding plate 30 can be fixed by the fixing part 70, and there is no direct fixed connection relationship between the conductive part 50 and the grounding plate 30; alternatively, after the position of the conductive part 50 is fixed by the fixing part 70, the conductive part 50 and the grounding plate 30 are fixedly connected; alternatively, the fixing part 70 is not required, and the conductive part 50 can be directly fixedly connected to the grounding plate 30.

[0063] In another embodiment of the utility model, an electronic expansion valve is provided, which includes the above-mentioned coil assembly. By arranging a shielding layer 41 outside the wire 42, the anti-electromagnetic interference capability of the wire 42 can be enhanced while reducing the electromagnetic interference of the wire 42 to the surrounding environment. And the connection end 411 of the shielding layer 41 is electrically connected to the grounding plate 30 directly or through the conductive part 50, and the grounding plate 30 is fixedly connected to the exposed stator housing 11. In this way, when an interference current appears on the wire 42, it can be transmitted to the connection end 411 through the shielding layer 41, and then transmitted to the grounding plate 30, and then transmitted to the ground. In this way, the static electricity or electromagnetic interference current outside the wire 42 can be quickly guided to the ground, avoiding the occurrence of electrical accidents, thereby improving the reliability and safety of the device operation.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0066] 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.

[0067] 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" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0068] 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.

[0069] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A coil assembly, characterized in that: The coil assembly comprises: A stator assembly (10), the stator assembly (10) comprising a stator housing (11) and a winding (12), the winding (12) being located in the stator housing (11), and the stator housing (11) being made of a conductive material and a magnetic conductive material; A connection terminal (20), wherein the connection terminal (20) is partially located outside the stator housing (11), and the connection terminal (20) is electrically connected to the winding (12); A wiring harness (40) comprises a shielding layer (41) and a wire (42), wherein one end of the wire (42) is electrically connected to the wiring terminal (20), and the other end of the wire (42) is used to connect to a wiring device, the shielding layer (41) is wrapped around the outside of the wire (42), the shielding layer (41) has a conductive material, and one end of the shielding layer (41) close to the wiring terminal (20) is a connecting end (411), the connecting end (411) is electrically connected to the stator housing (11), and the shielding layer (41) can be grounded.

2. The coil assembly according to claim 1, characterized in that: The coil assembly further comprises a grounding plate (30), one end of the grounding plate (30) being electrically connected to the stator housing (11), the other end of the grounding plate (30) being used for grounding, and the connection end (411) being electrically connected to the grounding plate (30).

3. The coil assembly according to claim 2, characterized in that: A wire fixing structure is provided on the grounding plate (30) and / or the stator housing (11), and the wire fixing structure is capable of fixing the relative position of the connection end (411) and the grounding plate (30) and / or the stator housing (11).

4. The coil assembly according to claim 3, characterized in that: The wire fixing structure comprises a clamping spring piece (301), wherein the clamping spring piece (301) is arranged on the grounding sheet (30), and the clamping spring piece (301) is used to clamp the connection end (411) on the grounding sheet (30).

5. The coil assembly according to claim 4, characterized in that: The grounding plate (30) comprises a first connecting section (31) and a second connecting section (32); the first connecting section (31) is connected to the stator housing (11); the second connecting section (32) is used for grounding; one end of the first connecting section (31) connected to the stator housing (11) comprises a notch (302); one end of the snap-fit ​​spring sheet (301) is located in the notch (302) and is connected to the first connecting section (31); an extension direction of the snap-fit ​​spring sheet (301) and an extension direction of the first connecting section (31) form an angle; the connecting end (411) is sandwiched between the snap-fit ​​spring sheet (301) and the first connecting section (31).

6. The coil assembly according to claim 4, characterized in that: The grounding sheet (30) and the clamping spring sheet (301) are an integrated structure.

7. The coil assembly according to claim 5, characterized in that: Extension portions (303) are also provided on both sides of the first connecting section (31), and the extension portions (303) are used to be connected to the stator housing (11).

8. The coil assembly according to claim 2, characterized in that: The coil assembly further comprises a conductive portion (50), wherein the conductive portion (50) is respectively connected to the grounding plate (30) and the connecting end (411), and the connecting end (411) is electrically connected to the grounding plate (30) through the conductive portion (50).

9. The coil assembly according to claim 8, characterized in that: The coil assembly comprises an encapsulating layer (60), the encapsulating layer (60) encapsulating the winding (12) and at least a portion of the connecting terminal (20), and a fixing portion (70) is provided on a side of the encapsulating layer (60) close to the grounding plate (30), and the fixing portion (70) is used to fix the relative position of the conductive portion (50) and the grounding plate (30).

10. The coil assembly according to claim 9, characterized in that: The fixing portion (70) comprises: A limiting groove is provided on the side wall of the encapsulation layer (60), and one end of the conductive part (50) is inserted into the limiting groove; or, A limiting protrusion is arranged on the side wall of the encapsulation layer (60), one end of the conductive part (50) is located between the limiting protrusion and the grounding plate (30), and the limiting protrusion is used to make the conductive part (50) abut against the grounding plate (30).

11. An electronic expansion valve, characterized in that: The electronic expansion valve comprises the coil assembly according to any one of claims 1 to 10.

Images