The control box, coil assembly, and electric valve of the electric valve

Abstract

This application relates to the field of fluid control technology, specifically to a control box, coil assembly, and electric valve for an electric valve. The control box includes: a housing having a receiving chamber for accommodating a circuit board assembly; the housing includes a first wall and a connecting portion disposed on the first wall, the connecting portion being used to connect to the coil of the electric valve; wherein the connecting portion is provided with a socket, a waterproof portion, and a fixing portion, the fixing portion being disposed outside the socket, the waterproof portion being disposed between the fixing portion and the socket, and the waterproof portion surrounding the outer periphery of the socket; the waterproof portion is used to cooperate with the coil to increase the connection area between the coil and the housing. By adding a waterproof portion, this control box reduces the probability of moisture and other contaminants entering the control box, thereby extending the service life of the circuit board assembly.

Description

Technical Field

[0001] This application relates to the field of fluid control technology, and more specifically, to a control box, coil assembly, and electric valve for an electric valve. Background Technology

[0002] Electric valves, as a type of flow control device, have the advantages of high adjustment accuracy and fast response speed. An electric valve generally consists of a coil assembly and a valve body assembly. During operation, a pulse signal is applied to the coil assembly to drive the valve core of the valve body assembly, thereby adjusting the opening and closing degree of the valve orifice and controlling the fluid flow rate.

[0003] In related technologies, a coil assembly typically includes a coil and a control box connected to the coil. The control box houses a circuit board assembly, and the coil is connected to the circuit board assembly within the control box via pins. The circuit board assembly adjusts the pulse signal of the coil, thereby regulating the opening and closing degree of the valve core and valve port.

[0004] However, when the coil and control box are formed and sealed together in different steps, the connection strength at the connection point between the coil and the control box is insufficient. When the coil assembly is subjected to vibration or other external forces, the connection point between the coil and the control box is prone to cracking and gaps, affecting the seal between the coil and the control box. Moisture from the external environment can easily enter the control box through the gap at the connection point, affecting the service life of the circuit board assembly. Utility Model Content

[0005] A primary objective of this application is to overcome at least one of the deficiencies of the prior art and provide a control box for an electric valve. This control box, by incorporating a waterproof element, reduces the probability of moisture entering the control box, thereby extending the service life of the circuit board assembly.

[0006] Another major objective of this application is to overcome at least one of the defects of the prior art described above and to provide a coil assembly that has the advantage of a long service life.

[0007] Another primary objective of this application is to overcome at least one of the deficiencies of the prior art described above and to provide an electric valve. This electric valve, by incorporating a coil assembly, also has the advantage of a long service life.

[0008] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0009] According to one aspect of this application, a control box for an electric valve includes: a housing having a receiving chamber for accommodating a circuit board assembly; the housing includes a first wall and a connecting portion disposed on the first wall, the connecting portion being for connecting to a coil of the electric valve; wherein the connecting portion is provided with a socket, a waterproof portion, and a fixing portion, the fixing portion being disposed outside the socket, the waterproof portion being disposed between the fixing portion and the socket, and the waterproof portion surrounding the outer periphery of the socket; the waterproof portion is used to cooperate with the coil to increase the connection area between the coil and the housing.

[0010] According to one embodiment of this application, the first wall includes a first surface facing the coil; the waterproof portion includes an annular boss protruding from the first surface; and / or, the waterproof portion includes an annular groove recessed into the first surface.

[0011] According to one embodiment of this application, the first wall includes a first surface facing the coil; the waterproof portion includes an annular groove recessed into the first surface; the annular groove includes a plurality of annular grooves, which are spaced apart between the insertion hole and the fixing portion.

[0012] According to one embodiment of this application, the first wall includes a first surface facing the coil; the waterproof portion includes an annular boss protruding from the first surface; the annular boss includes a plurality of annular bosses, which are spaced apart between the insertion hole and the fixing portion.

[0013] According to one embodiment of this application, the waterproof portion further includes a first welded rib, which is disposed on the surface of the waterproof portion facing the coil.

[0014] According to one embodiment of this application, the insertion hole includes a strip-shaped elongated hole, and the waterproof portion surrounds the outer periphery of the strip-shaped elongated hole; or, the insertion hole includes a plurality of spaced-apart pin holes, and the waterproof portion surrounds the outer side of the plurality of pin holes.

[0015] According to one embodiment of this application, the connecting part is further provided with a slot, and the insertion hole is provided on the bottom wall of the slot; the distance between the bottom wall of the slot and the first surface is between 2mm and 6mm.

[0016] According to one embodiment of this application, the control box further includes a reinforcing structure disposed on the first wall and close to the connecting portion, the reinforcing structure being used to connect with the coil; the reinforcing structure is provided with a recessed portion, the extending direction of the recessed portion being perpendicular to the extending direction of the socket.

[0017] According to one embodiment of this application, the fixing part includes a fixing groove recessed into the first surface; and / or, the fixing part includes a fixing protrusion protruding from the first surface.

[0018] According to one embodiment of this application, when the waterproof part includes an annular groove recessed into the first surface and the fixing part includes a fixing groove recessed into the first surface, the depth of the annular groove is greater than the depth of the fixing groove.

[0019] According to one embodiment of this application, when the waterproof part includes an annular boss protruding from the first surface and the fixing part includes a fixing protrusion protruding from the first surface, the protrusion height of the annular boss is greater than the protrusion height of the fixing protrusion.

[0020] According to another aspect of this application, a coil assembly includes:

[0021] The control box is the control box described above;

[0022] The coil includes a pin, a waterproof mating part, and a fixing mating part; the pin is inserted into the socket of the control box; the waterproof mating part is connected to the waterproof part of the control box; and the fixing mating part is connected to the fixing part of the control box.

[0023] According to one embodiment of this application, the coil includes a stator assembly and a housing. The stator assembly includes a coil body and a pin. The first end of the pin is connected to the coil body, and the second end of the pin extends into the control box. The housing is injection molded with the stator assembly and the control box as a fitting body. The housing includes the waterproof fitting part and the fixed fitting part.

[0024] According to another aspect of this application, an electric valve includes: a valve body assembly; and a coil assembly for regulating the flow rate of the valve body assembly, wherein the coil assembly is the aforementioned coil assembly.

[0025] An embodiment of the above application has at least the following advantages or beneficial effects:

[0026] The control box of the electric valve in this application includes a housing with a receiving chamber for accommodating a circuit board assembly. A socket, a waterproof portion, and a fixing portion are provided on the first wall of the housing. A pin on the coil can extend into the socket and electrically connect to the circuit board assembly. The fixing portion is used to securely connect the coil and the control box. The waterproof portion is disposed between the fixing portion and the socket, and surrounds the circumferential outer side of the socket. The waterproof portion can cooperate with the coil to increase the connection area between the coil and the housing. On the one hand, increasing the connection area between the coil and the housing improves the connection stability between the coil and the housing, reduces the probability of loosening due to vibration or other factors, and thus makes it difficult for moisture to enter the socket. On the other hand, increasing the connection area between the coil and the housing also increases the complexity of the connection gap between the coil and the housing. Specifically, the path of the connection gap is lengthened, and the bend of the path is increased, effectively reducing the probability of moisture entering the socket, ensuring the dryness and cleanliness of the receiving chamber, and effectively extending the service life of the circuit board assembly. Attached Figure Description

[0027] The various objectives, features, and advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of this application and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts.

[0028] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the coil assembly of the electric valve of this application;

[0029] Figure 2 yes Figure 1 A top view of the coil assembly;

[0030] Figure 3 This is a three-dimensional structural diagram of the first embodiment of the control box;

[0031] Figure 4 yes Figure 2 A cross-sectional view along plane AA, wherein, Figure 4 The second shell was omitted;

[0032] Figure 5 yes Figure 3 Top view of the central control box;

[0033] Figure 6 yes Figure 5 A cross-sectional view along plane BB, wherein, Figure 6 The second shell was omitted in the middle;

[0034] Figure 7 yes Figure 6 Enlarged structural diagram at point C;

[0035] Figure 8 yes Figure 4 A schematic diagram of the decomposed structure;

[0036] Figure 9 This is a three-dimensional structural schematic diagram of the control box of the electric valve in the second embodiment of this application;

[0037] Figure 10 yes Figure 9 A top view of the control box;

[0038] Figure 11 yes Figure 10 A sectional view along the DD plane, wherein, Figure 11 The second shell was omitted;

[0039] Figure 12 yes Figure 11 Enlarged view of point E in the middle.

[0040] The annotations in the attached figures are explained as follows:

[0041] 10. Control box; 20. Coil assembly;

[0042] 100. Shell; 101. Receiving chamber; 110. First shell; 111. First wall; 1111. First surface; 112. Connecting part; 113. Insertion hole; 114. Waterproof part; 1141. Annular boss; 1142. Annular groove; 1143. First welded rib; 115. Fixing part; 1151. Fixing groove; 1152. Second welded rib; 116. Slot; 1161. Slot bottom wall; 117. Reinforcing structure; 1171. Reinforcing boss; 1172. Recess; 120. Second shell;

[0043] 200. Coil; 210. Stator assembly; 211. Coil body; 212. Pin; 220. Housing; 221. Waterproof mating part; 222. Fixed mating part; 223. Insertion part; 224. Reinforcing mating part;

[0044] L, the centerline of the stator assembly;

[0045] D1, First Direction; D2, Second Direction; D3, Third Direction. Detailed Implementation

[0046] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0047] The features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0048] In related technologies, the coil assembly of an electric valve is prone to vibration during use, which can cause the connection between the coil and the control box to loosen. Moisture can easily enter the control box through the connection gap, affecting the service life of the circuit board assembly inside the control box.

[0049] In view of this, this application adds a waterproof part to the control box of the coil assembly, and the coil is connected and cooperated with the waterproof part to reduce the probability of moisture entering the control box.

[0050] For ease of explanation, the extension direction of the socket on the control box is defined as the first direction D1, and the extension direction of the center line L of the stator assembly in the coil is defined as the second direction D2. The first direction D1 is perpendicular to the second direction D2. The direction perpendicular to both the first direction D1 and the second direction D2 is defined as the third direction D3.

[0051] like Figure 1 and Figure 2 As shown, this application provides a coil assembly 20, which includes a control box 10 and a coil 200 connected to the control box 10.

[0052] Specifically, such as Figure 3 As shown, in the coil assembly 20 of this application, the embodiment of the control box 10 includes a housing 100, and a receiving chamber 101 is provided inside the housing 100 for accommodating the circuit board assembly. The housing 100 includes a first wall 111 and a connecting portion 112 disposed on the first wall 111. The connecting portion 112 is used to connect with the coil 200 of the electric valve. The connecting portion 112 is provided with a socket 113, a waterproof portion 114, and a fixing portion 115. The fixing portion 115 is disposed outside the socket 113 and is used to connect with the coil 200 to improve the connection tightness between the housing 100 and the coil 200. The waterproof portion 114 is disposed between the fixing portion 115 and the socket 113, and the waterproof portion 114 surrounds the circumferential outer side of the socket 113. The waterproof portion 114 can cooperate with the coil 200 to increase the connection area between the coil 200 and the housing 100.

[0053] On the one hand, increasing the connection area between the coil 200 and the housing 100 can improve the connection stability between the coil 200 and the housing 100, reduce the probability of the coil 200 and the housing 100 becoming loose due to factors such as vibration, and thus make it difficult for water to enter the socket 113.

[0054] On the other hand, increasing the connection area between the coil 200 and the housing 100 also increases the complexity of the connection gap between the coil 200 and the housing 100. That is to say, for water vapor to enter the socket 113, it needs to first pass through the connection gap between the fixing part 115 and the coil 200, then through the connection gap between the waterproof part 114 and the coil 200, and finally enter the socket 113. This process increases the length and bend of the water vapor flow path, thereby effectively reducing the probability of water vapor entering the socket 113.

[0055] Accordingly, such as Figure 3 and Figure 4 As shown, the coil 200 may include a stator assembly 210 and a housing 220. The stator assembly 210 includes a coil body 211 and a pin 212. A first end of the pin 212 is connected to the coil body 211. The housing 220 surrounds the stator assembly 210, while a second end of the pin 212 can pass through the housing 220 and into the receiving chamber 101 via a socket 113 on the housing 100, thereby achieving an electrical connection between the pin 212 and the circuit board assembly. The housing 220 can be connected to the connection portion 112 of the housing 100 to ensure the stability of the connection between the pin and the circuit board assembly.

[0056] Specifically, such as Figure 3 and Figure 4 As shown, a fixing part 222 and a waterproof part 221 can be provided on the outer casing 220. The fixing part 222 can be connected with the fixing part 115 to ensure the connection strength between the coil 200 and the casing 100. The waterproof part 221 can be connected with the waterproof part 114 to increase the connection area between the coil 200 and the casing 100, thereby increasing the connection strength between the two, reducing the possibility of cracking at the sealed connection position, and increasing the complexity of the connection gap, extending the water seepage path, reducing the probability of water vapor entering the receiving chamber 101, and ensuring the service life of the control box 10.

[0057] It should be noted that, as Figure 2 and Figure 5As shown, the control box 10 includes a first housing 110 and a second housing 120, with a first wall 111 disposed on the first housing 110. The second housing 120 covers the first housing 110, forming a closed receiving chamber 101 within the housing 100. The control box 10 also includes a circuit board assembly (not shown), disposed within the receiving chamber 101. Exemplarily, the receiving chamber 101 can be a sealed chamber or a waterproof and breathable chamber.

[0058] It should also be noted that, such as Figure 3 As shown, the socket 113 can be a pin hole, meaning that the socket 113 only accommodates the pin 212. The wall of the socket 113 can fit tightly with the pin 212 to improve the connection stability between the pin and the control box 10. For example, the socket 113 can be interference-fitted with the pin 212 to improve the connection stability and waterproofing between the pin 212 and the control box 10.

[0059] In other embodiments, the socket 113 may also accommodate the pin 212 and the portion of the housing 220 that encloses the pin.

[0060] It should also be noted that, such as Figure 3 As shown, in some embodiments, the socket 113 may include a plurality of sub-sockets spaced apart, and the waterproof part 114 surrounds the outside of the plurality of sub-sockets to reduce the probability of moisture entering each sub-socket.

[0061] Of course, in other embodiments, the socket 113 may also include an elongated slot, and multiple pins may be included, which may be spaced apart within the elongated slot. The waterproof portion 114 surrounds the outer periphery of the elongated slot to block moisture entering the elongated slot in all directions.

[0062] In some implementations, such as Figure 6 and Figure 7 As shown, the waterproof portion 114 may include an annular groove 1142. Specifically, the first wall 111 includes a first surface 1111 facing the coil 200, and the annular groove 1142 may be recessed into the first surface 1111.

[0063] Accordingly, such as Figure 8 As shown, the waterproof fitting part 221 on the outer shell 220 can be a boss structure that extends into the annular groove 1142. The boss structure fits into the annular groove 1142 in a conformal manner to ensure that the boss structure and the annular groove 1142 can be tightly connected.

[0064] It should be noted that multiple annular grooves 1142 can be provided, with multiple annular grooves 1142 spaced apart between the insertion hole 113 and the fixing part 115. That is to say, for water vapor to enter the insertion hole 113, it needs to pass through the gap between multiple annular grooves 1142 and the boss structure. This structure further improves the water-blocking effect of the waterproof part 114 on water vapor.

[0065] It should also be noted that, since the waterproof part 114 is surrounded on the outer periphery of the insertion hole 113, the waterproof part 114 can block water vapor entering the insertion hole 113 in all directions, thereby further ensuring the dryness and cleanliness of the receiving chamber 101.

[0066] Furthermore, such as Figure 6 and Figure 7 As shown, in some embodiments, the connecting portion 112 is further provided with a slot 116, and the insertion hole 113 is provided on the bottom wall 1161 of the slot 116. Correspondingly, the outer shell 220 of the coil 200 may be provided with a plug portion 223 that covers part of the pin 212. The plug portion 223 can conformally fit with the slot 116 to ensure the connection stability between the plug portion 223 and the slot 116. Due to the provision of the slot 116, the complexity of the connection gap between the coil 200 and the shell 100 is further increased, making it more difficult for moisture to enter the insertion hole 113, further ensuring the dryness and cleanliness of the receiving chamber 101.

[0067] It needs to be emphasized that, such as Figure 7 As shown, the distance H between the bottom wall 1161 of the slot 116 and the first surface 1111 is between 2mm and 6mm. The larger the distance H between the bottom wall 1161 of the slot 116 and the first surface 1111, the deeper the slot 116 is, and the longer the path for moisture to enter the socket 113. At the same time, a deeper slot 116 can also increase the connection area between the coil 200 and the housing 100, improving the connection stability between the two.

[0068] For example, the distance between the bottom wall 1161 of the groove and the first surface 1111 can be 2mm, 3mm, 4mm, 5mm, 6mm, or any value between any two adjacent surfaces.

[0069] Furthermore, such as Figure 7 As shown, in some embodiments, the control box 10 further includes a reinforcing structure 117 disposed on the first wall 111 and near the connecting portion 112. Exemplarily, the reinforcing structure 117 may be disposed immediately adjacent to the fixing portion 115. The reinforcing structure 117 can be used to connect with the coil 200.

[0070] Specifically, such as Figure 7As shown, the reinforcing structure 117 has a recess 1172, and the extending direction of the recess 1172 is perpendicular to the extending direction of the insertion hole 113 (first direction D1). Figure 8 As shown, a reinforcing fitting portion 224 may be provided on the outer shell 220 of the coil 200, and the reinforcing fitting portion 224 can extend into the recessed portion 1172. When the coil 200 and the shell 100 tend to separate along the first direction D1, since the reinforcing fitting portion 224 extends into the recessed portion 1172, a tensile force that resists the separation tendency can be formed between the reinforcing fitting portion 224 and the recessed portion 1172, thereby improving the connection stability of the coil 200 and the shell 100.

[0071] Furthermore, such as Figure 8 As shown, the reinforcing structure 117 can be a reinforcing boss 1171 provided on the first wall 111, and the recess 1172 can be a through hole or groove provided on the reinforcing boss 1171. It should also be noted that the recess 1172 can extend along the second direction D2 or along the third direction D3 (not shown in the figure), and the reinforcing mating part 224 can conformally fit with the recess 1172.

[0072] Furthermore, such as Figure 7 and Figure 8 As shown, in some embodiments, the fixing part 115 includes a fixing groove 1151 recessed into the first surface 1111, and correspondingly, the fixing mating part 222 on the housing 220 is a fixing protrusion that can be inserted into the fixing groove 1151.

[0073] Alternatively, in other embodiments, the fixing part 115 may include a fixing protrusion protruding from the first surface 1111, and correspondingly, the fixing mating part 222 on the housing 220 is a fixing groove that can accommodate the fixing protrusion.

[0074] Alternatively, in other embodiments, the fixing part 115 includes a fixing groove 1151 and a fixing protrusion, wherein the fixing groove 1151 is disposed on the outer or inner side of the fixing protrusion. The fixing mating part 222 conforms to the fixing part 115.

[0075] It should be noted that, as Figure 8 As shown, when the waterproof part 114 includes an annular groove 1142 recessed into the first surface 1111, and the fixing part 115 includes a fixing groove 1151 recessed into the first surface 1111, the depth of the annular groove 1142 is greater than the depth of the fixing groove 1151. This arrangement increases the connection area between the coil 200 and the housing 100 through the annular groove 1142, thereby increasing the connection strength between the two.

[0076] Accordingly, when the waterproof part 114 includes an annular boss 1141 protruding from the first surface 1111, and the fixing part 115 includes a fixing protrusion protruding from the first surface 1111, the protrusion height of the annular boss 1141 is greater than the protrusion height of the fixing protrusion. This arrangement increases the connection area between the coil 200 and the housing 100 through the annular boss 1141, thereby increasing the connection strength between the two.

[0077] It should also be noted that the connection between the coil 200 and the housing 100 can be a plug-in connection, injection molding connection, or welding.

[0078] Preferably, the coil 200 and the housing 100 can be connected by injection molding. Further, the outer shell 220 is injection molded with the stator assembly 210 and the housing 100 as a mating body. During injection molding, the first housing 110 in the housing 100 and the stator assembly 210 of the coil 200 can be placed into the injection mold to form a mating body. Specifically, the pins 212 in the stator assembly 210 can be inserted into the insertion holes 113 in the housing 100, so that the stator assembly 210 and the housing 100 form a stable mating body, and then the outer shell 220 is processed by injection molding. During injection molding, because the injection molding material is flowable, the structure of the outer shell 220 can achieve a conformal fit with the housing 100.

[0079] Specifically, such as Figure 8 As shown, the outer casing 220 may include a waterproof mating part 221, a fixing mating part 222, a plug-in part 223, and a reinforcing mating part 224. The waterproof mating part 221, the fixing mating part 222, the plug-in part 223, and the reinforcing mating part 224 are injection molded with the stator assembly 210 and the first housing as inserts. That is, the waterproof mating part 221 is injection molded to the waterproof part 114; the fixing mating part 222 is injection molded to the fixing part 115; the plug-in part 223 is injection molded to the slot 116; and the reinforcing mating part 224 is injection molded to the reinforcing structure 117.

[0080] Furthermore, to improve the tightness of the injection molding connection between the coil 200 and the housing 100, welding ribs can be provided on the housing 100. During injection molding, the welding ribs can be partially melted to improve the tightness of the connection with the coil 200.

[0081] Specifically, such as Figure 7As shown, in some embodiments, the waterproof portion 114 includes a first welding rib 1143, which is disposed on the surface of the waterproof portion 114 facing the coil 200. That is, the first welding rib 1143 can be disposed on the surface at any point where the waterproof portion 114 and the coil 200 are connected. Further, the first welding rib 1143 can be disposed on the bottom wall of the annular groove 1142. Correspondingly, the waterproof mating portion 221 can be provided with a first welding groove that mates with the first welding rib 1143.

[0082] Additionally, a second welding rib 1152 may be provided on the fixing part 115, and the second welding rib 1152 may be provided on the bottom wall of the fixing groove 1151. Correspondingly, a second welding groove that mates with the second welding rib 1152 is provided on the fixing mating part 222.

[0083] like Figures 9 to 12 As shown, this application also provides a second embodiment of the control box. The difference between the control box of the second embodiment and the control box of the first embodiment lies in the structure of the waterproof part.

[0084] Specifically, such as Figure 11 As shown, in the second embodiment of the control box, the waterproof part 114 includes an annular boss 1141 protruding from the first surface 1111. Accordingly, please refer to Figure 12 The waterproof mating part 221 on the outer shell 220 can be a groove structure that accommodates the annular boss 1141. The groove structure fits the annular boss 1141 in a conformal manner to ensure that the annular boss 1141 and the groove structure can be tightly connected.

[0085] It should be noted that multiple annular protrusions 1141 can be provided, with multiple annular protrusions 1141 spaced apart between the insertion hole 113 and the fixing part 115. That is to say, in order for water vapor to enter the insertion hole 113, it needs to pass through the gap between multiple annular protrusions 1141 and the groove structure, further improving the water vapor blocking effect of the waterproof part 114.

[0086] Of course, in other embodiments, the waterproof part 114 may also include an annular boss 1141 protruding from the first surface 1111 and an annular groove 1142 recessed into the first surface 1111. The annular boss 1141 may be located outside the annular groove 1142 or inside the annular groove 1142, and this embodiment does not limit this.

[0087] Furthermore, in a second embodiment of the control box, as Figure 12 As shown, a first weld rib 1143 may be provided on the surface of the annular boss 1141 facing the coil 200. That is, the first weld rib 1143 may be provided on the surface at any position where the annular boss 1141 and the coil 200 are connected.

[0088] This application also provides an electric valve, including a valve body assembly and a coil assembly 20. The coil assembly 20 is used to regulate the flow rate of the valve body assembly, and the embodiments of the coil assembly 20 have been described above.

[0089] For example, the electric valve can be an electronic expansion valve. In other embodiments, the electric valve of this application can also be other valves with a control box, and is not limited to this embodiment.

[0090] It should be noted that the electric valves shown in the accompanying drawings and described in this specification are merely a few examples among many types of electronic valves capable of employing the principles of this invention. It should be clearly understood that the principles of this invention are by no means limited to any detail or component of the electric valves shown in the accompanying drawings or described in this specification.

[0091] In summary, the electric valve of this application includes a control box 10 and a coil 200 connected to each other. The control box 10 includes a housing 100 with a receiving chamber 101 for accommodating a circuit board assembly. The housing 100 includes a first wall 111 and a connecting portion 112 disposed on the first wall 111 for connecting to the coil 200 of the electric valve. The connecting portion 112 is provided with a socket 113, a waterproof portion 114, a fixing portion 115, a reinforcing structure 117, and a slot 116. Correspondingly, the coil 200 is provided with a pin 212, a waterproof mating portion 221, a fixing mating portion 222, a reinforcing mating portion 224, and a plug-in portion 223. The pin 212 can extend into the socket 113; the waterproof mating part 221 can connect with the waterproof part 114 to improve the waterproof capability at the connection between the housing 100 and the coil 200; the fixing mating part 222 can connect with the fixing part 115 to improve the connection stability between the housing 100 and the coil 200; the reinforcing mating part 224 connects with the reinforcing structure 117 to further improve the connection strength between the housing 100 and the coil 200; the plugging part 223 plugs into the slot 116 to further improve the waterproof capability at the connection between the housing 100 and the coil 200. Therefore, on the one hand, the electric valve of this application can effectively reduce the probability of the coil 200 and the housing 100 loosening due to vibration and other factors. On the other hand, it can also effectively increase the complexity of the path for water vapor to enter the socket 113, making it difficult for water vapor to enter the control box 10, ensuring the dryness and cleanliness of the receiving chamber 101, and effectively extending the service life of the circuit board assembly.

[0092] Finally, it should be noted that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described in detail here.

[0093] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0094] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0095] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A control box for an electrically operated valve, characterised in that, include: The housing (100) has a receiving chamber (101) for receiving a circuit board assembly; the housing (100) includes a first wall (111) and a connecting portion (112) disposed on the first wall (111) for connecting to the coil (200) of the electric valve; The connecting part (112) is provided with a socket (113), a waterproof part (114) and a fixing part (115). The fixing part (115) is located on the outside of the socket (113), and the waterproof part (114) is located between the fixing part (115) and the socket (113), and the waterproof part (114) surrounds the outer periphery of the socket (113). The waterproof part (114) is used to connect with the coil (200) to increase the connection area between the coil (200) and the housing (100).

2. The control box according to claim 1, characterized in that, The first wall (111) includes a first surface (1111) facing the coil (200); The waterproof part (114) includes an annular boss (1141) protruding from the first surface (1111); And / or, the waterproof portion (114) includes an annular groove (1142) recessed into the first surface (1111).

3. The control box according to claim 1, characterized in that, The first wall (111) includes a first surface (1111) facing the coil (200); the waterproof part (114) includes an annular groove (1142) recessed into the first surface (1111); the annular groove (1142) includes a plurality of annular grooves (1142) and the plurality of annular grooves (1142) are spaced apart between the insertion hole (113) and the fixing part (115).

4. The control box according to claim 1, characterized in that, The first wall (111) includes a first surface (1111) facing the coil (200); the waterproof part (114) includes an annular boss (1141) protruding from the first surface (1111); the annular boss (1141) includes a plurality of annular bosses (1141), which are spaced apart between the insertion hole (113) and the fixing part (115).

5. The control box according to claim 1, characterized in that, The waterproof part (114) further includes a first welded rib (1143), which is disposed on the surface of the waterproof part (114) facing the coil (200).

6. The control box according to any one of claims 1-5, characterized in that, The insertion hole (113) includes a strip-shaped elongated hole, and the waterproof part (114) surrounds the outer periphery of the strip-shaped elongated hole; Alternatively, the socket (113) may include a plurality of spaced-apart pin holes, and the waterproof portion (114) may surround the outer side of the plurality of pin holes.

7. The control box according to any one of claims 2-4, characterized in that, The connecting part (112) is also provided with a slot (116), and the insertion hole (113) is provided on the bottom wall (1161) of the slot (116); The distance between the bottom wall (1161) of the slot (116) and the first surface (1111) is between 2mm and 6mm.

8. The control box according to any one of claims 1-5, characterized in that, The control box also includes a reinforcing structure (117), which is disposed on the first wall (111) and is used to connect with the coil (200). The reinforcing structure (117) is provided with a recess (1172), and the extending direction of the recess (1172) is perpendicular to the extending direction of the insertion hole (113).

9. The control box according to any one of claims 2-4, characterized in that, The fixing part (115) includes a fixing groove (1151) recessed into the first surface (1111); And / or, the fixing part (115) includes a fixing protrusion protruding from the first surface (1111).

10. The control box according to claim 9, characterized in that, When the waterproof part (114) includes an annular groove (1142) recessed into the first surface (1111) and the fixing part (115) includes a fixing groove (1151) recessed into the first surface (1111), the depth of the annular groove (1142) is greater than the depth of the fixing groove (1151).

11. The control box according to claim 9, characterized in that, When the waterproof part (114) includes an annular boss (1141) protruding from the first surface (1111) and the fixing part (115) includes a fixing protrusion protruding from the first surface (1111), the protrusion height of the annular boss (1141) is greater than the protrusion height of the fixing protrusion.

12. A coil assembly, characterized in that, include: The control box (10) is the control box (10) according to any one of claims 1-11; The coil (200) includes a pin (212), a waterproof mating part (221), and a fixing mating part (222); the pin (212) is inserted into the socket (113) of the control box (10); the waterproof mating part (221) is connected to the waterproof part (114) of the control box (10); and the fixing mating part (222) is connected to the fixing part (115) of the control box (10).

13. The coil assembly according to claim 12, characterized in that, The coil (200) includes a stator assembly (210) and a housing (220). The stator assembly (210) includes a coil body (211) and a pin (212). The first end of the pin (212) is connected to the coil body (211), and the second end of the pin (212) extends into the control box (10). The housing (220) is injection molded with the stator assembly (210) and the housing (100) as a fitting. The housing (220) includes the waterproof fitting part (221) and the fixed fitting part (222).

14. An electric valve, characterized in that, include: Valve body assembly; A coil assembly (20) for adjusting the flow rate of the valve body assembly, wherein the coil assembly (20) is the coil assembly as described in claim 12 or 13.

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