Coil member and valve device

Abstract

The application discloses a coil component and a valve device. The coil component comprises a coil body and a protective shell. The coil body has an axial through hole part. The protective shell is connected with the coil body. At least part of the protective shell is located above the through hole part. In a projection plane perpendicular to the axial direction of the coil component, the projection of the protective shell covers the projection of the through hole part. Through optimization of the structure of the coil component, the probability of moisture or water entering the inside of the coil component can be reduced, and the electrical insulation performance of the coil component can be ensured.

Description

Technical Field

[0001] This application relates to the field of valve device technology, and in particular to a coil component and a valve device. Background Technology

[0002] The air conditioning system is equipped with a valve device for dynamically adjusting the refrigerant flow.

[0003] The piping layout inside the air conditioning unit is quite complex. Pipes pass above the coil components of the valve device. Condensation may condense on the surface of the pipes and drip onto the coil components, eventually entering the inner hole of the coil components. The encapsulation structure of the coil components at the inner hole has channel gaps, which are easily penetrated by condensed water. If condensed water enters the interior of the coil components, it will lead to a decrease in electrical insulation performance, and in severe cases, cause product failure.

[0004] In other application scenarios, such as in humid environments, there is also a risk that moisture may seep into the valve device's coil components through the gaps in the channels. Utility Model Content

[0005] The purpose of this application is to provide a coil component and valve device. By optimizing the structure of the coil component, the probability of moisture or water entering the coil component can be reduced, which is beneficial to ensuring the electrical insulation performance of the coil component.

[0006] To solve the above-mentioned technical problems, this application provides a coil component, including a coil body and a protective shell. The coil body has an axial through hole, and the protective shell is connected to the coil body. At least a portion of the protective shell is located above the through hole, and in a projection plane perpendicular to the axial direction of the coil component, the projection of the protective shell covers the projection of the through hole.

[0007] With the above solution, the coil component is equipped with a protective shell, which is located above the through hole of the coil body. Due to the shielding effect of the protective shell on the open top of the through hole, it can effectively prevent external impurities, especially water droplets, from falling into the through hole, thereby reducing the probability of water intruding into the coil body. This can provide better protection for the coil body and help improve the electrical insulation performance of the coil body.

[0008] This application also provides a valve device, including a valve body component and a coil component, wherein the coil component is the aforementioned coil component, and the coil component is used to drive the valve needle of the valve body component to move to adjust the refrigerant flow.

[0009] Since the valve device includes the aforementioned coil component, it has the same technical effects as the aforementioned coil component, which will not be elaborated further. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of a coil component provided in one embodiment of this application;

[0011] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0012] Figure 3 for Figure 1 Structural diagram of the central protective shell;

[0013] Figure 4 for Figure 3 The cross-sectional view of the protective shell shown;

[0014] Figure 5 A cross-sectional view of the coil component in another embodiment provided in this application;

[0015] Figure 6 for Figure 5 A magnified view of part B in the middle;

[0016] Figure 7 for Figure 5 Structural diagram of the central protective shell;

[0017] Figure 8 for Figure 7 The cross-sectional view of the protective shell shown;

[0018] Figure 9 A structural diagram of another protective shell provided in this application;

[0019] Figure 10 for Figure 9 The diagram shows the structure of the protective shell from another perspective;

[0020] Figure 11 for Figure 9 The diagram shows a cross-sectional view of the protective casing.

[0021] Explanation of reference numerals in the attached figures:

[0022] Coil body 100, through hole 100a, stator body 110, wire frame 111, winding 112, electromagnetic pole plate 113, outer shell 114, pin 115, encapsulation layer 120, upper encapsulation wall 121, top wall surface 1211, inner peripheral wall surface 1212, corner 1213, lower encapsulation wall 122, side encapsulation wall 123, upper encapsulation cylinder 124, lower encapsulation cylinder 125;

[0023] Protective shell 200, cap body 210, cap brim 220, bottom wall 2201, tooth 221, first groove 222, positioning part 223, outer wall 2231, protrusion 224, cap brim end wall section 225, inclined wall 226, second groove 227, receiving cavity 201, snap-fit ​​structure 202. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The first and second ordinal numbers used in the embodiments of this application are used to distinguish different components with the same name, and do not indicate a specific order or primary and secondary relationship.

[0026] The directional terms "top" and "bottom" used in the embodiments of this application are defined by the position of the components in the accompanying drawings and the positions between the components. They are only used to make the technical solution clear and convenient and do not constitute a limitation on the scope of protection.

[0027] This application provides a coil component that can be used in a valve device as part of the valve device's drive mechanism. The valve device can be an electronic expansion valve, applied in an air conditioning system. See also... Figure 1 , Figure 1 This is a cross-sectional view of a coil component provided in one embodiment of this application.

[0028] like Figure 1 As shown, the coil component includes a coil body 100, which has an axial through hole 100a.

[0029] In some applications, at least a portion of the rotor component of the valve device is located within the through-hole 100a of the coil body 100. During operation, the coil body 100 generates a periodically changing magnetic field after being energized, which can drive the rotor component to rotate in the forward or reverse direction, thereby actuating the valve needle of the valve device to achieve the function of regulating the cooling flow rate.

[0030] The through-hole 100a penetrates both the top and bottom surfaces of the coil body 100. That is, the top of the coil body 100 is an open structure. The through-hole 100a extends in the top-to-bottom direction of the coil component, and its extension direction is consistent with the axial direction of the coil component.

[0031] In this embodiment, the coil component further includes a protective shell 200, which is connected to the coil body 100. At least a portion of the protective shell 200 is located above the through hole 100a, and the projection of the protective shell 200 covers the projection of the through hole 100a in a projection plane perpendicular to the axial direction of the coil component. In other words, the protective shell 200 can cover the top opening of the through hole 100a.

[0032] In applications such as air conditioning systems, external impurities, moisture, or water (such as condensate from pipes) may fall into the through-hole 100a from the top of the coil body 100. Water may penetrate the coil body 100, leading to a decrease in its electrical insulation performance. With the above solution, the protective shell 200 effectively prevents external impurities, especially water droplets, from falling into the through-hole 100a, thus reducing the probability of water intrusion into the coil body 100. This provides better protection for the coil body 100 and improves its electrical insulation performance.

[0033] In this embodiment, the coil body 100 includes a stator body 110 and an encapsulation layer 120. The encapsulation layer 120 can cover the outer side wall, at least part of the upper end wall, and at least part of the lower end wall of the stator body 110, and the encapsulation layer 120 is used to achieve insulation protection for the stator body 110.

[0034] The stator body 110 includes at least one winding unit. When the stator body 110 has two or more winding units, each winding unit is arranged along the axial direction of the coil body 100. Figure 1 In the example shown, the stator body 110 has two winding units.

[0035] Each winding unit includes a wire frame 111, a winding 112, an electromagnetic pole plate 113, and a housing 114. The winding 112 can be an enameled wire winding, wound on the wire frame 111. The electromagnetic pole plate 113 supports the wire frame 111. The housing 114 covers the outer periphery of the wire frame 111 and the upper surface of the wire frame 111 away from the wire frame. Both the electromagnetic pole plate 113 and the housing 114 are provided with toothed poles that can be inserted into the inner hole of the wire frame 111. The toothed poles can converge and amplify the magnetic field generated by the winding 112. Figure 1 As shown, the two outer shells 114 of the two winding units can be connected by means of snap-fit ​​or other methods. The stator body 110 also includes a pin 115, which is connected to the winding 112 and can be connected to an external drive controller via a lead wire.

[0036] During operation, the external drive controller can send a pulse drive signal to the stator body 110 through the lead wire of the connecting pin 115. The winding 112 is energized to generate a magnetic field, which can attract the corresponding magnetic poles on the rotor component of the valve device to drive the rotor component to rotate in the forward or reverse direction.

[0037] The specific structural composition and connection method of the stator body 110 can be set with reference to existing technologies, and are not the core of this invention, so they will not be described in detail here.

[0038] Please refer to this as well. Figure 2 , Figure 2 for Figure 1A magnified view of part A in the middle.

[0039] Combination Figure 1 and Figure 2 The encapsulation layer 120 includes an upper encapsulation wall portion 121, a lower encapsulation wall portion 122, and a side encapsulation wall portion 123. The upper encapsulation wall portion 121 covers the upper end wall of the stator body 110, the lower encapsulation wall portion 122 covers the lower end wall of the stator body 110, and the side encapsulation wall portion 123 covers the outer side wall of the stator body 110.

[0040] In this embodiment, the encapsulation layer 120 further includes an upper encapsulation tube portion 124 and a lower encapsulation tube portion 125. The upper encapsulation tube portion 124 is inserted into the upper end of the inner hole of the stator body 110, and the lower encapsulation tube portion 125 is inserted into the lower end of the inner hole of the stator body 110. The upper encapsulation tube portion 124 extends downward from the inner circumference of the upper encapsulation wall portion 121, and the lower encapsulation tube portion 125 can be understood as extending upward from the inner circumference of the lower encapsulation wall portion 122.

[0041] In the embodiment where the encapsulation layer 120 has an upper encapsulation cylinder portion 124 and a lower encapsulation cylinder portion 125, the peripheral wall of the through hole portion 100a of the coil body 100 includes the inner peripheral wall of the upper encapsulation cylinder portion 124, the inner peripheral wall of the lower encapsulation cylinder portion 125, and the inner peripheral wall of the stator body 110. That is, the inner hole portions of the upper encapsulation cylinder portion 124 and the inner hole portions of the lower encapsulation cylinder portion 125 are portions of the through hole portion 100a.

[0042] In other embodiments, the encapsulation layer 120 may not have an upper encapsulation tube portion 124, or it may not have a lower encapsulation tube portion 125, or it may not have both an upper encapsulation tube portion 124 and a lower encapsulation tube portion 125.

[0043] Please refer to this as well. Figure 3 and Figure 4 , Figure 3 for Figure 1 Structural diagram of the middle protective shell, Figure 4 for Figure 3 The diagram shows a cross-sectional view of the protective casing.

[0044] In this embodiment, the protective shell 200 is generally cap-shaped, and includes a cap body 210 and a brim 220. The bottom of the cap body 210 is open, and the brim 220 is connected to the outer periphery of the bottom of the cap body 210. In other words, the brim 220 extends radially from the bottom of the cap body 210 away from the inner cavity of the cap body 210. The brim 220 is fixedly connected to the upper sealing wall 121 of the encapsulation layer 120. In a projection plane perpendicular to the axial direction of the coil component, the projection of the cap body 210 covers the projection of the through hole 100a.

[0045] After the above settings are configured, the protective shell 200 will seal the top opening of the through hole 100a, which can further reduce the probability of external moisture or water entering the coil body 100 and effectively protect the coil body 100.

[0046] The brim 220 of the protective shell 200 can be fixedly connected to the encapsulation layer 120 by welding, hot melting or hot riveting, etc. Among them, welding can be done by ultrasonic welding, etc.

[0047] The brim 220 of the protective shell 200 can be fixedly connected to the encapsulation layer 120 by means of snap-fit ​​or fastener connection, or the brim 220 and the encapsulation layer 120 can be fixed by means of adhesive bonding.

[0048] In some embodiments, the brim 220 is provided with teeth 221 facing the upper sealing wall 121, which are configured to fuse with the upper sealing wall 121 after melting.

[0049] In actual operation, ultrasonic welding or hot melting can be used to heat and melt the teeth 221 of the brim 220. After the teeth 221 are heated and melted, they fuse with the upper sealing wall 121 of the sealing layer 120, thereby achieving a reliable connection between the brim 220 and the upper sealing wall 121.

[0050] In some implementations, the brim portion 220 may be provided with a first groove 222 adjacent to the teeth 221. The first groove 222 is used to accommodate at least a portion of the molten teeth 221. The first groove 222 can constrain the flow range of the molten teeth 221, ensuring that the molten teeth 221 can effectively fuse with the upper sealing wall portion 121 to achieve a reliable connection.

[0051] The first groove 222 can be provided on the outer side of the tooth 221 away from the through hole 100a, or it can be provided on the inner side close to the through hole 100a.

[0052] exist Figures 1 to 4 In the illustrated embodiment, the brim portion 220 is provided with two first grooves 222, and a toothed portion 221 is located between the two first grooves 222 along the radial direction of the through hole portion 100a. In other words, the toothed portion 221 has a first groove 222 on its outer side away from the through hole portion 100a, and a first groove 222 on its inner side near the through hole portion 100a. The radial direction of the through hole portion 100a is perpendicular to the axial direction of the coil component.

[0053] In some implementations, the first groove 222 can be formed by recessing upward from the bottom wall surface 2201 of the brim 220.

[0054] In some embodiments, the protective shell 200 is provided with a positioning part 223, at least a portion of which is inserted into the inner hole of the upper sealing wall part 121. By utilizing the insertion and cooperation between the positioning part 223 and the inner hole of the upper sealing wall part 121, the relative position of the protective shell 200 and the coil body 100 can be restricted. During assembly, the positioning part 223 can be used to pre-assemble the protective shell 200 and the coil body 100, ensuring that the protective shell 200 can effectively protect the coil body 100.

[0055] The positioning part 223 can extend downward from the bottom end of the protective shell 200. The positioning part 223 can be a closed ring structure. The positioning part 223 can also include multiple positioning portions, which are distributed at intervals along the circumference of the protective shell 200.

[0056] The positioning part 223 has an outer wall surface 2231 facing away from the inner cavity of the protective shell 200, and at least a portion of the outer wall surface 223 of the positioning part 223 contacts at least a portion of the inner peripheral wall surface 1212 of the upper sealing wall part 121.

[0057] Combination Figure 2 and Figure 4 In the embodiment where the protective shell 200 is provided with a positioning part 223, the outer side of the bottom wall surface 2201 of the brim 220 can be provided with a protruding part 224 protruding in the direction of the encapsulation layer 121, and the tooth 221 can protrude downward from the bottom wall surface 2201 of the brim 220. In this way, the outer tooth wall of the tooth 221 away from the positioning part 223, part of the bottom wall surface 2201 of the brim 220, and the inner side wall of the protruding part 224 toward the tooth 221 enclose to form a first groove 222, and the inner tooth wall of the tooth 221 near the positioning part 223, part of the bottom wall surface 2201 of the brim 220, and the outer wall surface 2231 of the positioning part 223 enclose to form another first groove 222.

[0058] Please refer to this as well. Figures 5 to 8 , Figure 5 This is a cross-sectional view of the coil component in another embodiment provided in this application. Figure 6 for Figure 5 A magnified view of part B in the middle. Figure 7 for Figure 5 Structural diagram of the middle protective shell, Figure 8 for Figure 7 The diagram shows a cross-sectional view of the protective casing.

[0059] Figures 5 to 8 The illustrated embodiment is the same as the one described above. Figures 1 to 4Compared to the illustrated embodiment, the coil components have similar structural compositions, and the protective shell 200 of the coil components also has a similar structure. The main difference lies in the connection and mating structure between the protective shell 200 and the encapsulation layer 120 of the coil body 100. The differences will be described in detail below; for other points not covered herein, please refer to the aforementioned descriptions. Figures 1 to 4 The description of the illustrated embodiments is already clear and will not be repeated here.

[0060] To clearly illustrate this embodiment and Figures 1 to 4 Differences and connections between the embodiments shown Figures 5 to 8 The same function and structure are illustrated using the same symbols.

[0061] contrast Figure 5 , Figure 6 as well as Figure 1 , Figure 2 In this embodiment, the encapsulation layer 120 of the coil body 100 includes an upper encapsulation wall portion 121, a lower encapsulation wall portion 122, and a side encapsulation wall portion 123. The encapsulation layer 120 does not have the following features: Figure 1 and Figure 2 The upper encapsulation cylinder part 124 and the lower encapsulation cylinder part 125 are shown. Figure 5 and Figure 6 In the embodiment shown, the through hole portion 100a of the coil body includes the inner hole portion of the stator body 110.

[0062] Figures 5 to 8 In the illustrated embodiment, the protective shell 200 also includes a cap body 210 and a brim 220, and the brim 220 is also provided with teeth 221 facing the upper sealing wall 121. The teeth 221 can be melted and fused with the upper sealing cylinder 124 by ultrasonic welding, hot melting or other methods to achieve a fixed connection between the protective shell 200 and the coil body 100.

[0063] The protective housing 200 also has a positioning part 223, at least a portion of which is inserted into the inner hole of the upper sealing wall part 121. At least a portion of the outer wall surface 2231 of the positioning part 223 contacts at least a portion of the inner peripheral wall surface 1212 of the upper sealing wall part 121. During assembly, pre-positioning or assembly functions can be achieved to limit the relative position of the protective housing 200 and the coil body 100.

[0064] Figures 5 to 8 In the illustrated embodiment, the upper enclosing wall portion 121 includes a top wall surface 1211 and an inner peripheral wall surface 1212, with a corner 1213 formed at the junction of the top wall surface 1211 and the inner peripheral wall surface 1212. Typically, the corner 1213 is a right angle, meaning the top wall surface 1211 and the inner peripheral wall surface 1212 are perpendicular. The top wall surface 1211 and the inner peripheral wall surface 1212 may also be at other angles.

[0065] The brim portion 220 includes a brim end wall section 225 and an inclined wall portion 226. The brim end wall section 225 abuts against the top wall surface 1211 of the upper encapsulating wall portion 121. The inclined wall portion 226 is located near the through hole portion 100a relative to the brim end wall section 225, and faces the corner portion 1213. At least a portion of the inclined wall portion 226 is positioned below the brim end wall section 225. The inclined wall portion 226 and the corner portion 1213 are configured to fuse together after melting. This increases the connection area between the brim portion 220 and the encapsulating layer 120, improving the reliability of the connection between the protective shell 200 and the encapsulating layer 120.

[0066] In actual operation, the inclined wall portion 226 and the corner portion 1213 can be connected by ultrasonic welding, hot melting, or other methods.

[0067] Figures 5 to 8 In the illustrated embodiment, the toothed portion 221 is located away from the through-hole portion 100a relative to the inclined wall portion 226. The brim portion 220 is provided with a second groove portion 227, which is located between the inclined wall portion 226 and the toothed portion 221 along the radial direction of the through-hole portion 100a. The second groove portion 227 can constrain the flow range of the molten toothed portion 221, ensuring that the molten toothed portion 221 can effectively fuse with the upper sealing wall portion 121 to achieve a reliable connection.

[0068] In the specific implementation, the tooth 221 is located on the end wall section 225 of the brim. The tooth 221 protrudes downward from the end wall section 225 of the brim, and the second groove 227 is recessed from the end wall section 225 of the brim in a direction away from the upper sealing wall section 121.

[0069] In other embodiments, the brim 220 of the protective shell 200 can also be fixedly connected to the coil body 100 by means of adhesive bonding, snap-fitting, or fastener connection.

[0070] In addition to the aforementioned structural forms, the protective shell 200 can also have other structural forms, which can be referred to. Figures 9 to 11 , Figure 9 This is a structural diagram of another protective shell provided in this application. Figure 10 for Figure 9 The diagram shown is a structural representation of the protective casing from another perspective. Figure 11 for Figure 9 The diagram shows a cross-sectional view of the protective casing.

[0071] like Figures 9 to 11 As shown, in this embodiment, the protective shell 200 has a receiving cavity 201 that is closed at the top and open at the bottom. The protective shell 200 can cover the outside of the coil body 100, and at least the top portion of the coil body 100 is located inside the receiving cavity 201. The protective shell 200 is fixedly connected to the coil body 100. In this way, external moisture can be effectively prevented from entering the interior of the coil body 100, thus achieving effective protection for the coil body 100.

[0072] In some implementations, the protective shell 200 can completely cover the coil body 100.

[0073] In some implementations, the protective shell 200 and the coil body 100 can be fixed by a snap-fit ​​mechanism. For example, the protective shell 200 has a snap-fit ​​structure 202 inside, through which the protective shell 200 can be snapped onto the coil body 100. The coil body 100 can be provided with a snap-fit ​​part that cooperates with the snap-fit ​​structure 202. The snap-fit ​​structure 202 can be in the form of a hook, etc.

[0074] In addition to the aforementioned coil component, this application also provides a valve device, which includes a valve body component and a coil component. The coil component is the same as described in the foregoing embodiments, and is used to drive the valve needle of the valve body component to move to regulate the refrigerant flow. This valve device has the same technical effects as the aforementioned coil component, and will not be described again.

[0075] Other structural components of the valve device can be implemented with reference to existing technologies, and will not be described in detail here.

[0076] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A coil component, characterized in that, The device includes a coil body and a protective shell. The coil body has an axial through-hole portion. The protective shell is connected to the coil body. At least a portion of the protective shell is located above the through-hole portion. In a projection plane perpendicular to the axial direction of the coil component, the projection of the protective shell covers the projection of the through-hole portion.

2. The coil component according to claim 1, characterized in that, The coil body includes a stator body and an encapsulation layer. The encapsulation layer includes an upper encapsulation wall portion, which covers the upper end wall of the stator body. The through hole portion penetrates the upper encapsulation wall portion. The protective shell includes a cap body and a brim. The bottom of the cap body is open, and the brim is connected to the outer periphery of the bottom of the cap body. The brim is fixedly connected to the upper sealing wall. In a projection plane perpendicular to the axial direction of the coil component, the projection of the cap body covers the projection of the through hole.

3. The coil component according to claim 2, characterized in that, The brim is provided with teeth facing the upper sealing wall, and the teeth are configured to fuse with the upper sealing wall after melting.

4. The coil component according to claim 3, characterized in that, The brim is provided with a first groove adjacent to the teeth, the first groove being used to accommodate at least a portion of the melted teeth.

5. The coil component according to claim 4, characterized in that, The brim is provided with two first grooves; along the radial direction of the through hole, the tooth is located between the two first grooves.

6. The coil component according to claim 3, characterized in that, The upper sealing wall includes a top wall surface and an inner peripheral wall surface, and the connection between the top wall surface and the inner peripheral wall surface forms a corner. The brim portion includes a brim end wall section and an inclined wall portion. The brim end wall section abuts against the top wall surface. The inclined wall portion is close to the through hole relative to the brim end wall section. The inclined wall portion faces the corner portion, and at least a portion of the inclined wall portion is disposed below the brim end wall section. The inclined wall portion and the corner portion are configured to fuse together after melting.

7. The coil component according to claim 6, characterized in that, The toothed portion is away from the through hole relative to the inclined wall portion. The brim portion is provided with a second groove portion. Along the radial direction of the through hole portion, the second groove portion is located between the inclined wall portion and the toothed portion. The second groove portion is recessed from the brim end wall section in a direction away from the upper sealing wall portion.

8. The coil component according to any one of claims 2-7, characterized in that, The protective shell is provided with a positioning part, at least a portion of which is inserted into the inner hole of the upper sealing wall, and at least a portion of the outer wall surface of the positioning part is in contact with at least a portion of the inner peripheral wall surface of the upper sealing wall.

9. The coil component according to claim 2, characterized in that, The brim of the hat is bonded or snapped to the upper sealing wall.

10. The coil component according to claim 1, characterized in that, The protective shell has a receiving cavity that is closed at the top and open at the bottom. The protective shell covers the outside of the coil body. At least the top part of the coil body is located inside the receiving cavity. The protective shell is fixedly connected to the coil body.

11. A valve device, characterized in that, It includes a valve body component and a coil component, wherein the coil component is the coil component according to any one of claims 1-10, and the coil component is used to drive the valve needle of the valve body component to move to regulate the refrigerant flow.

Images