Electric valve and manufacturing method of stator assembly of electric valve

Abstract

The invention discloses an electrically operated valve and a manufacturing method of a stator assembly of the electrically operated valve, and the method comprises the steps: manufacturing an upper stator assembly, a lower stator assembly and a switching pin assembly, and then assembling the upper stator assembly, the lower stator assembly and the switching pin assembly to form a stator assembly main body; and the assembled stator assembly main body is subjected to injection molding by using an injection mold to form a stator injection molding piece, so that the upper stator assembly, the lower stator assembly and the switching pin assembly are constructed to be subjected to integral injection molding. The position sensor is installed on the first switching pin of the stator assembly, the two ends of the switching pin column of the switching pin assembly are exposed out of the outer side of the stator injection molding part to form a first switching pin and a second switching pin respectively, the first switching pin is used for being connected with the position sensor, and the second switching pin is used for being connected with the printed circuit board assembly. And the whole printed circuit board is not assembled, so that the mounting gap can be well guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal management, more particularly, to an electric valve and a manufacturing method of a stator assembly of the electric valve. BACKGROUND

[0002] In the field of thermal management, electric valves are widely used, which generally include a valve seat, a valve core and a driving component, wherein the driving component is used to drive the valve core to act, so as to control the flow of fluid in the thermal management system, and its normal work is crucial to the performance and stability of the thermal management system. The driving component generally includes a stator assembly, a position sensor and an adapter pin.

[0003] When the electric valve is a single valve, the stator assembly thereof mostly adopts a short needle and a printed circuit board assembly (PCBA) passing through the valve seat assembly sleeve, and the position sensor patch is welded on the PCBA; but when the electric valve is a multi-valve integrated application scenario, there will be a certain position deviation between the valves due to machining errors, and the distance requirement between the position sensor and the valve seat assembly is high, so if the position sensor is still welded on the PCBA in the single valve patch welding mode, the gap between the position sensor and the valve seat assembly cannot be guaranteed.

[0004] In summary, how to solve the problem that the installation gap of the stator assembly of the electric valve cannot be easily guaranteed has become a technical problem to be solved by the person skilled in the art. SUMMARY

[0005] Therefore, the present application provides an electric valve and a manufacturing method of a stator assembly of the electric valve to solve the problem that the installation gap of the stator assembly of the electric valve cannot be easily guaranteed.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A manufacturing method of an electric valve, the manufacturing method comprising manufacturing a stator assembly, and the manufacturing process of the stator assembly specifically comprising:

[0008] manufacturing an upper stator assembly, a lower stator assembly and an adapter pin assembly;

[0009] assembling the upper stator assembly, the lower stator assembly and the adapter pin assembly to form a stator assembly main body;

[0010] injection molding the stator assembly main body formed by the assembling by using an injection mold to form a stator injection molded part;

[0011] Wherein, two ends of the adapter pin column of the adapter pin assembly are exposed outside the stator injection molded part to form a first adapter pin and a second adapter pin respectively, the first adapter pin is used for connecting a position sensor, and the second adapter pin is used for connecting a printed circuit board assembly.

[0012] Compared with the background art, the manufacturing method of the electric valve, in the process of manufacturing the stator assembly, the upper stator assembly, the lower stator assembly and the adapter pin assembly are manufactured, and then the upper stator assembly, the lower stator assembly and the adapter pin assembly are assembled to form a stator assembly main body, and the stator assembly main body is injection molded by using an injection mold to form a stator injection molded part, so that the upper stator assembly, the lower stator assembly and the adapter pin assembly are integrally injection molded, and two ends of the adapter pin column of the adapter pin assembly are exposed outside the stator injection molded part to form a first adapter pin and a second adapter pin respectively, the first adapter pin is used for connecting a position sensor, and the second adapter pin is used for connecting a printed circuit board assembly, since the position sensor is installed on the first adapter pin of the stator assembly instead of the entire printed circuit board assembly, the installation gap can be well guaranteed, even if the electric valve is a multi-valve integration, the installation gap between the position sensor and the valve seat assembly will not be limited by the printed circuit board assembly, so that the installation gap is more easily guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0014] Figure 1 The structure schematic diagram of the upper stator assembly provided for the embodiments of the present application;

[0015] Figure 2 The structure schematic diagram of the upper skeleton and the upper stator pin provided for the embodiments of the present application;

[0016] Figure 3 The structure schematic diagram of the upper stator coil winding on the upper skeleton provided for the embodiments of the present application;

[0017] Figure 4 The structure schematic diagram of the upper stator shell provided for the embodiments of the present application;

[0018] Figure 5 The structure schematic diagram of the upper electromagnetic pole plate provided for the embodiments of the present application;

[0019] Figure 6The structure schematic diagram of the lower stator assembly provided by the embodiment of the present application is shown in the following figure;

[0020] Figure 7 The structure schematic diagram of the lower skeleton and the lower stator pin provided by the embodiment of the present application is shown in the following figure;

[0021] Figure 8 The structure schematic diagram of the lower stator coil winding on the lower skeleton provided by the embodiment of the present application is shown in the following figure;

[0022] Figure 9 The structure schematic diagram of the lower stator coil winding on the lower skeleton and the pre-bending of the lower stator pin provided by the embodiment of the present application is shown in the following figure;

[0023] Figure 10 The structure schematic diagram of the lower stator shell provided by the embodiment of the present application is shown in the following figure;

[0024] Figure 11 The structure schematic diagram of the lower electromagnetic pole plate provided by the embodiment of the present application is shown in the following figure;

[0025] Figure 12 The structure schematic diagram of the adapter pin assembly provided by the embodiment of the present application is shown in the following figure;

[0026] Figure 13 The structure schematic diagram of the upper stator assembly, the lower stator assembly and the adapter pin assembly assembled to form the stator assembly main body and the second adapter pin completed bending provided by the embodiment of the present application is shown in the following figure;

[0027] Figure 14 The structure schematic diagram of the second adapter pin completed bending on the stator injection molding provided by the embodiment of the present application is shown in the following figure;

[0028] Figure 15 The structure schematic diagram of the upper stator assembly, the lower stator assembly and the adapter pin assembly assembled to form the stator assembly main body and the second adapter pin not completed bending provided by the embodiment of the present application is shown in the following figure;

[0029] Figure 16 The structure schematic diagram of the second adapter pin not completed bending on the stator injection molding provided by the embodiment of the present application is shown in the following figure;

[0030] Figure 17 The flow chart of the manufacturing method of the stator assembly provided by the embodiment of the present application is shown in the following figure;

[0031] Figure 18 The structure schematic diagram of the electric valve constructed as multiple single electric valves integratedly installed in one control box provided by the embodiment of the present application is shown in the following figure.

[0032] Wherein, Figures 1-18 The structure schematic diagram of the electric valve constructed as multiple single electric valves integratedly installed in one control box provided by the embodiment of the present application is shown in the following figure.

[0033] The upper stator assembly 1, the upper stator body 11, the second pin support 110, the first sub-supporting part 110a, the upper framework 111, the upper stator coil 112, the upper stator shell 113, the first loading port 1131, the first avoiding port 1132, the upper electromagnetic pole plate 114, and the upper stator pin 12;

[0034] The lower stator assembly 2, the lower stator body 21, the third pin support 210, the second sub-supporting part 210a, the convex card 210b, the lower framework 211, the lower stator coil 212, the lower stator shell 213, the second loading port 2131, the second avoiding port 2132, the lower electromagnetic pole plate 214, and the lower stator pin 22;

[0035] The adapter pin assembly 3, the adapter needle column 30, the first adapter pin 301, the second adapter pin 302, the bending buffer part 3021, the first pin support 31, and the card slot 311;

[0036] The stator injection molding part 4;

[0037] The needle column fixing part 5;

[0038] The stator assembly main body 6;

[0039] The single electric valve 7;

[0040] The control box 8. DETAILED DESCRIPTION

[0041] The core of the present application is to provide an electric valve and a manufacturing method of a stator assembly thereof, so as to solve the problem that the installation gap of the stator assembly of the electric valve is not easy to guarantee.

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] Referring to Figures 1-16 The present application provides a manufacturing method of an electric valve, which comprises manufacturing a stator assembly, wherein the manufacturing process of the stator assembly specifically comprises:

[0044] Step S100: manufacturing an upper stator assembly 1, a lower stator assembly 2, and an adapter pin assembly 3;

[0045] Step S200: assembling the upper stator assembly 1, the lower stator assembly 2, and the adapter pin assembly 3 to form a stator assembly main body 6;

[0046] Step S300: injection molding the stator assembly body 6 formed by assembling to form the stator injection part 4 by using an injection mold;

[0047] Wherein, the two ends of the adapter pin column 30 of the adapter pin assembly 3 are exposed outside the stator injection part 4 to form a first adapter pin 301 and a second adapter pin 302 respectively, the first adapter pin 301 is used to connect the position sensor, and the second adapter pin 302 is used to connect the printed circuit board assembly.

[0048] The manufacturing method of the electric valve, in the process of manufacturing the stator assembly, by manufacturing the upper stator assembly 1, the lower stator assembly 2 and the adapter pin assembly 3, then assembling the upper stator assembly 1, the lower stator assembly 2 and the adapter pin assembly 3 to form the stator assembly body 6, and then injection molding the stator assembly body 6 formed by assembling to form the stator injection part 4 by using an injection mold, so that the upper stator assembly 1, the lower stator assembly 2 and the adapter pin assembly 3 are integrally injection molded, and the two ends of the adapter pin column 30 of the adapter pin assembly 3 are exposed outside the stator injection part 4 to form a first adapter pin 301 and a second adapter pin 302 respectively, the first adapter pin 301 is used to connect the position sensor, and the second adapter pin 302 is used to connect the printed circuit board assembly, since the position sensor is installed on the first adapter pin 301 of the stator assembly instead of the entire printed circuit board assembly, the installation gap can be well guaranteed, for example, the stator assembly is applied to the electric valve, even if the electric valve is integrated with multiple valves, the installation gap between the position sensor and the valve seat assembly will not be limited by the printed circuit board assembly, so that the installation gap is more easily guaranteed.

[0049] It should be noted that the above-mentioned position sensor is preferably but not limited to a Hall sensor, the first adapter pin 301 can be connected with the position sensor through a small adapter circuit board assembly, which is more convenient to connect, and the small adapter circuit board assembly can be integrated on the position sensor. In addition, the second adapter pin 302 can be configured as a bent pin structure; wherein the bent pin structure of the second adapter pin 302 can be bent before the adapter pin assembly 3 is assembled with the upper stator assembly 1 and the lower stator assembly 2; or the bent pin structure of the second adapter pin 302 can be bent after the adapter pin assembly 3 is integrally injection molded with the upper stator assembly 1 and the lower stator assembly 2. In actual application, the arrangement can be selected according to actual needs, and no more specific limitations are made here.

[0050] In some specific embodiments, referring to Figure 12As shown, the adapter pin assembly 3 further comprises a first pin support 31 for fixing the adapter pin columns 30, and each adapter pin column 30 is arranged on the first pin support 31 in an injection molding manner. By designing each adapter pin column 30 to be arranged on the first pin support 31 in an injection molding manner, the adapter pin assembly 3 can form an integral module, which is more convenient to install. Of course, it should be understood that the design of each adapter pin column 30 arranged on the first pin support 31 in an injection molding manner is only a preferred example of the embodiment of the present application, and in actual application, it can also be designed to be arranged on the first pin support 31 in other ways, as long as each adapter pin assembly 3 can form an integral module to achieve the purpose of convenient installation.

[0051] In further embodiments, before arranging each adapter pin column 30 on the first pin support 31 in an injection molding manner, the method can further include the following steps: a first bending operation, which bends each adapter pin column 30 once to make the first adapter pin 301 and the second adapter pin 302 of the adapter pin column 30 form a 90° angle; wherein the injection molding position of each adapter pin column 30 is at the first bending position. By designing in this way, the injection molding position of each adapter pin column 30 can be determined in advance, which is more convenient for injection molding operation.

[0052] In further embodiments, the manufacturing method can further include the following steps: a second bending operation, which bends each adapter pin column 30 twice to make the first adapter pin 301 and the second adapter pin 302 of the adapter pin column 30 parallel; wherein the second bending position of the second bending operation of the adapter pin column 30 is between the first bending position and the second adapter pin 302. It should be noted that, for the specific structure of the second bending position, reference can be made to the description of the second bending position of the adapter pin column 30 in the adapter pin assembly 3. Figure 12 As shown, in order to make the second adapter pin 302 have a certain flexibility when assembled and connected with the printed circuit board, the end of the second adapter pin 302 close to the stator injection molding part 4, i.e., close to the first bending position, can be provided with a bending buffer part 3021. The specific structure of the bending buffer part 3021 can be, but is not limited to, a preformed U-shaped bending.

[0053] In addition, it should be noted that the second bending operation can be performed after the first bending operation and before the injection molding of each adapter pin column 30 on the first pin support 31. Figure 15 Figure 16 The second bending operation can also be performed after the injection molding of the stator assembly body 6 using the injection molding mold. In actual application, the corresponding process position can be selected according to the actual processing requirements and the convenience of processing, and no more specific limitations are made here.

[0054] In some specific embodiments, reference can be made to Figures 1-5 ​As shown, the upper stator assembly 1 can specifically include an upper stator body 11 and an upper stator pin 12 arranged on the upper stator body 11, which is mainly used for connecting the winding in the upper stator body 11 to the printed circuit board assembly; the upper stator body 11 can specifically include an upper skeleton 111, an upper stator coil 112 wound on the upper skeleton 111, an upper stator shell 113, and an upper electromagnetic pole plate 114, the upper stator pin 12 is arranged on the upper skeleton 111 and connected with the upper stator coil 112, the lower part of the upper stator shell 113 is provided with a first loading port 1131 for loading the upper skeleton 111 and the upper stator coil 112 and a first avoiding port 1132 for avoiding the upper stator pin 12, and the upper electromagnetic pole plate 114 is connected with the upper stator shell 113 and covers the first loading port 1131; wherein, the connection mode between the upper electromagnetic pole plate 114 and the upper stator shell 113 can be but not limited to the snap-fit connection mode, such as referring to Figure 1 、 Figure 4 and Figure 5 As shown, the upper stator shell 113 is provided with corresponding snap-fit grooves, and the upper electromagnetic pole plate 114 is provided with snap-fit tongues matched with the snap-fit grooves, and in order to facilitate the assembly and positioning between the upper electromagnetic pole plate 114 and the first loading port 1131, the outer edge of the first loading port 1131 can be designed with a positioning notch, and the outer edge of the upper electromagnetic pole plate 114 is designed with a positioning part matched with the positioning notch.

[0055] Based on the above structure of the upper stator assembly 1, in step S100, the manufacturing steps of the upper stator assembly 1 can specifically include:

[0056] Step S101: pre-assembling the upper stator pin 12 on the upper skeleton 111;

[0057] Step S102: winding the upper stator coil 112 on the upper skeleton 111 and connecting the upper stator coil 112 with the upper stator pin 12;

[0058] Step S103: loading the upper skeleton 111 with the upper stator coil 112 wound thereon into the upper stator shell 113 from the first loading port 1131, and leading the upper stator pin 12 out of the first avoiding port 1132;

[0059] Step S104: covering the upper electromagnetic pole plate 114 on the first loading port 1131 and connecting it with the upper stator shell 113.

[0060] In a further embodiment, the upper skeleton 111 can be provided with a second pin support 110 for fixing the upper stator pin 12. The upper stator pin 12 can be pre-assembled to the upper skeleton 111 in the following manner: the root of the upper stator pin 12 is pre-bent to form a first pre-assembly root; the first pre-assembly root is injection molded to the second pin support 110 by using an injection molding machine. By designing the injection molding manner to arrange the upper stator pin 12 on the second pin support 110, the installation of the upper stator pin 12 is more stable and reliable. Of course, it can be understood that the above injection molding manner is only a preferred example of the embodiment of the present application for fixing the upper stator pin 12 to the second pin support 110 of the upper skeleton 111. In actual application, other fixing manners can also be designed, which are not limited in more detail herein.

[0061] In a further embodiment, the manufacturing process of the stator assembly can further include: bending the main body of the upper stator pin 12, so that the upper stator pin 12 can be arranged side by side with the second adapter pin 302 after the completion of the second bending operation. By designing such a structure, at least part of the pins for connecting to the printed circuit board assembly can be arranged in a concentrated manner, which is more convenient for pin arrangement and arrangement of the corresponding connection position on the printed circuit board assembly.

[0062] It should be noted that the bending operation of the main body of the upper stator pin 12 can be selected before the pre-assembly of the upper stator pin 12 to the upper skeleton 111. Alternatively, the bending operation of the main body of the upper stator pin 12 can be selected after the winding of the upper stator coil 112 to the upper skeleton 111 and the connection of the upper stator coil 112 to the upper stator pin 12, and before the loading of the upper skeleton 111 with the wound upper stator coil 112 into the upper stator housing 113 from the first loading port 1131. Alternatively, the bending operation of the main body of the upper stator pin 12 can be selected after the injection molding of the stator assembly body 6 assembled by using an injection molding mold. In actual application, the corresponding operation sequence can be selected according to actual needs, which is not limited in more detail herein.

[0063] Similarly, with reference to Figures 6-11As shown, the lower stator assembly 2 can specifically include a lower stator body 21 and a lower stator pin 22 arranged on the lower stator body 21, which is mainly used for connecting the winding in the lower stator body 21 to the printed circuit board assembly; the lower stator body 21 can specifically include a lower skeleton 211, a lower stator coil 212 wound on the lower skeleton 211, a lower stator shell 213, and a lower electromagnetic pole plate 214, the lower stator pin 22 is arranged on the lower skeleton 211 and connected with the lower stator coil 212, the upper side of the lower stator shell 213 is provided with a second loading port 2131 for loading the lower skeleton 211 and the lower stator coil 212 and a second avoiding port 2132 for avoiding the lower stator pin 22, and the lower electromagnetic pole plate 214 is connected with the lower stator shell 213 and covers the second loading port 2131; wherein the connection mode between the lower electromagnetic pole plate 214 and the lower stator shell 213 can be but not limited to the snap-fit connection mode, such as referring to Figure 6 、 Figure 10 and Figure 11 As shown, the lower stator shell 213 is provided with corresponding snap-fit grooves, and the lower electromagnetic pole plate 214 is provided with snap-fit tongues matched with the snap-fit grooves, and in order to facilitate the assembly and positioning between the lower electromagnetic pole plate 214 and the second loading port 2131, the outer edge of the second loading port 2131 can be designed with a positioning notch, and the outer edge of the lower electromagnetic pole plate 214 is designed with a positioning part matched with the positioning notch.

[0064] Based on the above structure of the lower stator assembly 2, in step S100, the manufacturing steps of the lower stator assembly 2 include:

[0065] Step S101': pre-assemble the lower stator pin 22 to the lower skeleton 211;

[0066] Step S102': wind the lower stator coil 212 to the lower skeleton 211 and connect the lower stator coil 212 with the lower stator pin 22;

[0067] Step S103': load the lower skeleton 211 wound with the lower stator coil 212 into the lower stator shell 213 from the second loading port 2131, and make the lower stator pin 22 lead out from the second avoiding port 2132;

[0068] Step S104': cover the lower electromagnetic pole plate 214 on the second loading port 2131 and connect it with the lower stator shell 213.

[0069] In a further embodiment, the lower skeleton 211 can be provided with a third pin support 210 for fixing the lower stator pin 22, and the lower stator pin 22 is pre-assembled to the lower skeleton 211 in the following manner: the root of the lower stator pin 22 is pre-bent to form a second pre-assembly root; the second pre-assembly root is injection molded to the third pin support 210 by using an injection molding machine. By designing the injection molding method to set the lower stator pin 22 on the third pin support 210, the installation of the lower stator pin 22 is more stable and reliable. Of course, it can be understood that the above injection molding method is only a preferred example of the embodiment of the present application for fixing the lower stator pin 22 to the third pin support 210 of the lower skeleton 211, and in actual application, other fixing methods can also be designed, which are not limited in more detail here.

[0070] In a further embodiment, the manufacturing process of the stator assembly further includes: bending the main body of the lower stator pin 22, so that after the manufacturing of the stator assembly is completed, the lower stator pin 22 can be arranged side by side with the second adapter pin 302 which has completed the second bending operation. Similarly, by designing such a structure, at least part of the pins for connecting to the printed circuit board assembly can be arranged in a centralized manner, which is more convenient for pin arrangement and the arrangement of the corresponding connection position on the printed circuit board assembly.

[0071] In a further embodiment, referring to Figure 1 , Figure 6 and Figures 12-16 , the upper stator pin 12, the lower stator pin 22 and the second adapter pin 302 can be designed to be arranged side by side and drawn out of the stator injection molding part 4. By designing such a structure, the upper stator pin 12, the lower stator pin 22 and the second adapter pin 302 are arranged in a centralized manner, which is more convenient for connecting to the printed circuit board assembly; wherein the adapter pin assembly 3 further includes a first pin support 31 for fixing the adapter pin column 30, the upper stator body 11 is provided with a second pin support 110 for fixing the upper stator pin 12, and the lower stator body 21 is provided with a third pin support 210 for fixing the lower stator pin 22. By designing the above various pin supports, the corresponding pin structure assembly is more convenient and stable.

[0072] It should be noted that the operation of bending the main body of the lower stator pin 22 can be performed before the lower stator pin 22 is preassembled to the lower skeleton 211, or after the lower stator coil 212 is wound on the lower skeleton 211 and connected to the lower stator pin 22, and before the lower skeleton 211 with the lower stator coil 212 wound thereon is loaded into the lower stator housing 213 from the second loading port 2131, or after the stator assembly body 6 formed by assembly is injection molded by using an injection mold. In actual application, the corresponding operation sequence can be selected according to actual needs, and no more specific limitation is made herein.

[0073] In further embodiments, as shown in Figure 1 , Figure 6 and Figures 12-16 , the adapter pin 30 can be specifically configured as a three-pin structure, and the upper stator pin 12 and the lower stator pin 22 are both configured as a two-pin structure. It can be understood that the number of pins is only a preferred example of the embodiments of the present application, and in actual application, the configuration can be selected according to actual needs, and no more specific limitation is made herein. Specifically, the two-pin structure of the upper stator pin 12 can be specifically designed to be symmetrically distributed on both sides of the adapter pin 30, and the two-pin structure of the lower stator pin 22 is also preferably designed to be symmetrically distributed on both sides of the adapter pin 30. At this time, the two sides of the first pin support 31 can be specifically provided with a clamping groove 311, the second pin support 110 is configured as two first sub-supports 110a symmetrically arranged, the third pin support 210 is configured as two second sub-supports 210a symmetrically arranged, the outer sides of the two first sub-supports 110a and the two second sub-supports 210a are adapted, and the two second sub-supports 210a are respectively provided with a protruding clamping 210b adapted to the clamping groove 311 on the corresponding side.

[0074] Based on the structure of the first pin support 31, the second pin support 110 and the third pin support 210, in the step S200 of the manufacturing process of the stator assembly, the upper stator assembly 1, the lower stator assembly 2 and the adapter pin assembly 3 can be assembled in the following manner:

[0075] Step S201: installing the adapter pin assembly 3 to the lower stator assembly 2, and making the two protruding clamps 210b respectively adapted to the clamping grooves 311 on the corresponding side;

[0076] Step S202: installing the upper stator assembly 1 to the lower stator assembly 2, and making the two first sub-supports 110a and the two second sub-supports 210a adapted to the outer sides.

[0077] By designing the above structure, when the upper stator assembly 1 and the lower stator assembly 2 are assembled, the outer sides of the two first sub-supporting parts 110a and the two second sub-supporting parts 210a are matched, the matching assembly between the second pin support 110 and the third pin support 210 can be achieved, and the first pin support 31 can be assembled and opened and closed by matching the clamping groove 311 and the protruding clamping part 210b on the two second sub-supporting parts 210a of the third pin support 210. On the one hand, the assembly and positioning are more convenient, and on the other hand, the integrated arrangement of the pins is more convenient.

[0078] In some specific embodiments, referring to Figure 14 and Figure 16 , the stator assembly can further include a needle column fixing part 5, and the three-needle column structure of the adapter needle column 30, the two-needle column structure of the upper stator pin 12, and the two-needle column structure of the lower stator pin 22 are fixed on the needle column fixing part 5 in a side-by-side arrangement. By designing the needle column fixing part 5, the pins are fixed as a whole, which is more convenient for assembly and matching connection with the printed circuit board. The needle column fixing part 5 can be an injection molding part, and the part of the corresponding pin embedded in the needle column fixing part 5 can be designed with an injection molding reinforcing structure to increase the injection molding contact area of this position with the needle column fixing part 5 and improve the stability of the injection molding part as a whole. Of course, it can be understood that the needle column fixing part 5 can also be an assembly clamping part, as long as it can realize the function of fixing and integrating the pins, and no more specific limitations are made here.

[0079] Specifically, in the process of manufacturing the stator assembly, after the injection molding of the stator assembly body 6 formed by assembly is performed by using an injection molding mold, the second adapter pin 302, the upper stator pin 12, and the lower stator pin 22 are injection molded on the needle column fixing part 5 in a side-by-side arrangement.

[0080] In some more specific embodiments, referring to Figure 18 , the electric valve is not limited to a single valve body structure, but can also be a structure with multiple valve bodies arranged in an integrated manner. When the electric valve is configured as a structure with multiple valve bodies arranged in an integrated manner, the manufacturing method of the electric valve further includes: assembling the manufactured stator assembly with a valve core to form a single electric valve 7; and integrating and installing multiple single electric valves 7 in a control box body 8. The control box body 8 is provided with multiple installation cavities, and the single electric valve 7 is installed in the installation cavity. The electric valve obtained by using the above manufacturing method can realize the integrated arrangement of multiple valve bodies and better meet the control requirements of multiple valve bodies.

[0081] It is worth mentioning that the above-mentioned electric valve is preferably but not limited to be applied to a thermal management system; in addition, the stator assembly made by the manufacturing method of the above-mentioned electric valve can be but not limited to be applied to an electronic expansion valve, such as can also be applied to other valve bodies or pumps and the like involving a stator assembly connected to a position sensor, which can make it easier to ensure the installation gap.

[0082] It should be noted that each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0083] As shown in the present application and claims, unless the context clearly indicates otherwise, "one", "a", "an", and / or "the" do not refer to the singular, but can also include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, product or device.

[0084] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this document is only a description of the association between the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B, and B alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0085] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0086] The principles and implementation modes of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the core idea of the present application. Although the present application has been described with reference to the preferred embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method of manufacturing an electrically operated valve, characterized by, The manufacturing method comprises manufacturing a stator assembly, and the manufacturing process of the stator assembly comprises the following steps: manufacturing an upper stator assembly (1), a lower stator assembly (2) and a transition pin assembly (3); assembling the upper stator assembly (1), the lower stator assembly (2) and the transition pin assembly (3) to form a stator assembly body (6); injection molding the stator assembly body (6) formed by the assembling by using an injection mold to form a stator injection part (4); wherein two ends of a transition pin column (30) of the transition pin assembly (3) are exposed outside the stator injection part (4) to form a first transition pin (301) and a second transition pin (302) respectively, the first transition pin (301) is used for connecting a position sensor, and the second transition pin (302) is used for connecting a printed circuit board assembly.

2. The method of claim 1, wherein the valve is an electrodynamic valve. The transition pin assembly (3) further comprises a first pin support (31) for fixing the transition pin column (30), and each transition pin column (30) is arranged in the first pin support (31) in an injection molding manner.

3. The method of claim 2, wherein the step of forming the valve further comprises the step of: Before each transition pin column (30) is arranged in the first pin support (31) in an injection molding manner, the manufacturing method further comprises the following steps: ​ one bending operation is performed on each transition pin column (30) to bend the transition pin column (30) once to make the first transition pin (301) and the second transition pin (302) of the transition pin column (30) be 90°; wherein the one bending position of each transition pin column (30) is injection molded in the first pin support (31).

4. The method of claim 3, wherein the step of forming the valve further comprises the step of: The manufacturing process of the stator assembly further comprises the following steps: ​ two bending operations are performed on each transition pin column (30) to bend the transition pin column (30) twice to make the first transition pin (301) and the second transition pin (302) of the transition pin column (30) be parallel; wherein the two bending positions of the transition pin column (30) for the two bending operations are located between the one bending position and the second transition pin (302).

5. The method of claim 4, wherein the step of forming the valve further comprises the step of:

5. forming the valve by injection molding. The two bending operations are performed after the one bending operation is completed and before each transition pin column (30) is injection molded into the first pin support (31).

6. The method for manufacturing the electric valve as described in claim 4, characterized in that, The two bending operations are performed after the stator assembly body (6) formed by the assembling is injection molded by using the injection mold. The two bending operations are performed after the stator assembly body (6) formed by the assembling is injection molded by using the injection mold.

7. The method of claim 4-6, wherein the method further comprises: The upper stator assembly (1) comprises an upper stator body (11) and an upper stator pin (12) arranged on the upper stator body (11), the upper stator body (11) comprises an upper skeleton (111), an upper stator coil (112) wound on the upper skeleton (111), an upper stator shell (113) and an upper electromagnetic pole plate (114), the upper stator pin (12) is arranged on the upper skeleton (111) and connected with the upper stator coil (112), the lower part of the upper stator shell (113) is provided with a first loading port (1131) for loading the upper skeleton (111) and the upper stator coil (112) and a first avoiding port (1132) for avoiding the upper stator pin (12), and the upper electromagnetic pole plate (114) is connected with the upper stator shell (113) and covers the first loading port (1131); The manufacturing steps of the upper stator assembly (1) comprise: Pre-installing the upper stator pin (12) on the upper skeleton (111); Winding the upper stator coil (112) on the upper skeleton (111) and connecting the upper stator coil (112) with the upper stator pin (12); Loading the upper skeleton (111) wound with the upper stator coil (112) into the upper stator shell (113) from the first loading port (1131) and leading the upper stator pin (12) out of the first avoiding port (1132); Covering the upper electromagnetic pole plate (114) on the first loading port (1131) and connecting it with the upper stator shell (113).

8. The method of claim 7, wherein the step of forming the valve further comprises the step of:

8. forming a valve body having a cylindrical shape and a valve seat formed on an inner surface of the valve body. The upper skeleton (111) is provided with a second pin support (110) for fixing the upper stator pin (12), and the upper stator pin (12) is pre-installed on the upper skeleton (111) in the following way: Pre-bending the root of the upper stator pin (12) to form a first pre-installed root; Using an injection molding machine to inject the first pre-installed root onto the second pin support (110).

9. The method of claim 8, wherein the valve is an electrodynamic valve. The manufacturing process of the stator assembly further comprises: Bending the main part of the upper stator pin (12) so that the upper stator pin (12) can be arranged side by side with the second adapter pin (302) after the completion of the secondary bending operation of the stator assembly.

10. The method of claim 9, wherein the valve is an electrodynamic valve. The operation of bending the main part of the upper stator pin (12) is performed before the upper stator pin (12) is pre-installed on the upper skeleton (111); Or, the operation of bending the main part of the upper stator pin (12) is performed after winding the upper stator coil (112) on the upper skeleton (111) and connecting the upper stator coil (112) with the upper stator pin (12), and before loading the upper skeleton (111) wound with the upper stator coil (112) into the upper stator shell (113) from the first loading port (1131); Or, the operation of bending the main part of the upper stator pin (12) is performed after using an injection mold to injection mold the stator assembly body (6) assembled.

11. The method of claim 8-10, wherein the method further comprises: The lower stator assembly (2) comprises a lower stator body (21) and a lower stator pin (22) arranged on the lower stator body (21), the lower stator body (21) comprises a lower skeleton (211), a lower stator coil (212) wound on the lower skeleton (211), a lower stator shell (213) and a lower electromagnetic pole plate (214), the lower stator pin (22) is arranged on the lower skeleton (211) and connected with the lower stator coil (212), the upper side of the lower stator shell (213) is provided with a second loading port (2131) for loading the lower skeleton (211) and the lower stator coil (212) and a second avoiding port (2132) for avoiding the lower stator pin (22), and the lower electromagnetic pole plate (214) is connected with the lower stator shell (213) and covers the second loading port (2131); The manufacturing steps of the lower stator assembly (2) comprise: Pre-installing the lower stator pin (22) on the lower skeleton (211); Winding the lower stator coil (212) on the lower skeleton (211) and connecting the lower stator coil (212) with the lower stator pin (22); Loading the lower skeleton (211) wound with the lower stator coil (212) into the lower stator shell (213) from the second loading port (2131) and leading the lower stator pin (22) out of the second avoiding port (2132); Covering the lower electromagnetic pole plate (214) on the second loading port (2131) and connecting it with the lower stator shell (213).

12. The method of claim 11, wherein the valve is an electrodynamic valve. The lower skeleton (211) is provided with a third pin support (210) for fixing the lower stator pin (22), and the lower stator pin (22) is pre-installed on the lower skeleton (211) in the following way: Pre-bending the root of the lower stator pin (22) to form a second pre-installed root; Using an injection molding machine to inject the second pre-installed root onto the third pin support (210).

13. The method of claim 12, wherein the valve is an electrodynamic valve. The manufacturing process of the stator assembly further comprises: Bending the main part of the lower stator pin (22) so that the lower stator pin (22) can be arranged side by side with the second adapter pin (302) after the completion of the secondary bending operation of the stator assembly.

14. The method of claim 13, wherein the valve is an electrodynamic valve. The operation of bending the main part of the lower stator pin (22) is performed before the lower stator pin (22) is pre-installed on the lower skeleton (211); Or, the operation of bending the main part of the lower stator pin (22) is performed after the lower stator coil (212) is wound on the lower skeleton (211) and connected with the lower stator pin (22), and before the lower skeleton (211) wound with the lower stator coil (212) is loaded into the lower stator shell (213) from the second loading port (2131); Or, the operation of bending the main part of the lower stator pin (22) is performed after the injection molding of the assembled stator assembly body (6) using an injection molding die.

15. The method of claim 12-14, wherein the method further comprises: The first pin support (31) is provided with a clamping groove (311) on both sides, the second pin support (110) is configured as two first sub-supporting parts (110a) arranged symmetrically, the third pin support (210) is configured as two second sub-supporting parts (210a) arranged symmetrically, the outer sides of the two first sub-supporting parts (110a) and the two second sub-supporting parts (210a) are adapted, and the two second sub-supporting parts (210a) are respectively provided with a protruding clamping part (210b) adapted to the clamping groove (311) on the corresponding side. In the manufacturing process of the stator assembly, the upper stator assembly (1), the lower stator assembly (2) and the adapter pin assembly (3) are assembled in the following manner: The adapter pin assembly (3) is installed on the lower stator assembly (2), and the two protruding clamping parts (210b) are respectively adapted to the clamping groove (311) on the corresponding side. The upper stator assembly (1) is installed on the lower stator assembly (2), and the outer sides of the two first sub-supporting parts (110a) and the two second sub-supporting parts (210a) are adapted.

16. The method of claim 15, wherein the valve is an electrodynamic valve. The stator assembly further comprises a needle column fixing part (5). In the manufacturing process of the stator assembly, after the injection molding of the assembled stator assembly body (6) is performed by using an injection mold, the following steps are further included: The second adapter pin (302), the upper stator pin (12) and the lower stator pin (22) are injection molded on the needle column fixing part (5) in a side-by-side arrangement.

17. The method of claim 1-6, 8-10, 12-14, and 16, wherein, The manufacturing method further comprises: The manufactured stator assembly is assembled with a spool to form a single electric valve (7); A plurality of the single electric valves (7) are integrated and installed in a control box body (8).

18. A method of manufacturing a stator assembly for use in an electrically operated valve, the method comprising: The manufacturing method specifically comprises: Manufacturing the upper stator assembly (1), the lower stator assembly (2) and the adapter pin assembly (3); Assembling the upper stator assembly (1), the lower stator assembly (2) and the adapter pin assembly (3) to form a stator assembly body (6); Injection molding of the assembled stator assembly body (6) by using an injection mold to form a stator injection molded part (4); In the manufacturing process of the stator assembly, after the injection molding of the assembled stator assembly body (6) is performed by using an injection mold, the following steps are further included: The two ends of the adapter needle column (30) of the adapter pin assembly (3) are exposed outside the stator injection molded part (4) to form a first adapter pin (301) and a second adapter pin (302) respectively, the first adapter pin (301) is used for connecting a position sensor, and the second adapter pin (302) is used for connecting a printed circuit board assembly.

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