Electric valve

Abstract

The electric valve comprises a valve element, a valve body and an electromagnetic coil, the electromagnetic coil comprises a shell, a circuit board, a stator assembly, a plugging assembly and a cover plate, and the circuit board is provided with a plane A facing the cover plate and a plane B deviating from the cover plate; a first group of pins of the stator assembly are inserted into the circuit board along the direction from the plane B to the plane A and are welded on the circuit board, the circuit board is arranged in an inner cavity of the shell, and the cover plate covers an opening of the inner cavity; the plug-in assembly is fixed on the cover plate and is separated from the cover plate; a second group of pins of the plug-in assembly are inserted into the circuit board along the direction from the plane A to the plane B and are electrically connected to the circuit board; the position of the first group of pins on the plane A of the circuit board does not coincide with the orthographic projection of the plugging assembly on the plane A. According to the electrically operated valve provided by the invention, the problem that poor contact is easy to occur due to the fact that tin soldering cannot be carried out on a pin and a circuit board of an existing stator assembly is solved.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to an electric valve. Background Technology

[0002] Currently, electric valves are commonly installed in refrigeration systems. These electric valves mainly consist of a valve body and an electromagnetic coil. The electromagnetic coil contains a stator, and the valve body contains a rotor. When the electromagnetic coil is energized and generates a magnetic field, the stator inside the electromagnetic coil can drive the rotor inside the valve body to rotate, thereby moving the valve core and adjusting the refrigerant flow rate at the valve port to achieve higher control precision.

[0003] The electromagnetic coil includes a circuit board, a stator assembly, and a connector assembly. The stator assembly and the connector assembly are electrically connected to opposite sides of the circuit board. However, the connector assembly is relatively large and often obscures the soldering points between the stator assembly pins and the circuit board, making it difficult to solder the stator assembly pins to the circuit board. Utility Model Content

[0004] Therefore, it is necessary to provide an electric valve to solve the problem of poor contact that easily occurs between the pins and circuit boards of existing stator assemblies because they cannot be soldered.

[0005] The electric valve provided in this application includes a valve core, a valve body, and an electromagnetic coil. The electromagnetic coil contains a stator assembly, and the valve body contains a rotor assembly. When the electromagnetic coil is energized and generates a magnetic field, the stator assembly drives the rotor assembly to rotate, thereby moving the valve core to adjust the valve opening of the electric valve. The electromagnetic coil includes a housing, a circuit board, a connector assembly, and a cover plate. The circuit board has an A-plane facing the cover plate and a B-plane facing away from the cover plate. The stator assembly has a first set of pins, which are inserted into and soldered to the circuit board along the direction from the B-plane to the A-plane. The housing has an inner cavity, in which the circuit board is disposed, and the cover plate covers the opening of the inner cavity. The connector assembly has a second set of pins, which is fixed to the cover plate and separate from it. The second set of pins is inserted into and electrically connected to the circuit board along the direction from the A-plane to the B-plane. The position of the first set of pins on the A-plane of the circuit board does not coincide with the orthographic projection of the connector assembly on the A-plane.

[0006] In one embodiment, the second set of pins is soldered to the circuit board; or, the second set of pins is press-fitted to the circuit board.

[0007] In one embodiment, the electromagnetic coil further includes a grounding pin, one end of which is connected to the stator housing of the stator assembly, and the other end is soldered and electrically connected to the circuit board. The position of the grounding pin on the circuit board in plane A does not coincide with the orthographic projection of the connector assembly in plane A.

[0008] In one embodiment, the electromagnetic coil further includes a plurality of positioning portions, one end of which is connected to the outer periphery of the connector assembly, and the other end of which abuts against the inner wall of the inner cavity, so that the connector assembly can be positioned and engaged with the housing through the positioning portions.

[0009] In one embodiment, the positioning part includes a plurality of positioning pieces disposed on the outer periphery of the connector assembly, some of the positioning pieces abutting against the inner wall of the housing, and other positioning pieces abutting against the outer wall of the stator assembly extending into the inner cavity.

[0010] In one embodiment, the electromagnetic coil further includes a plurality of positioning posts, one end of which is fixedly connected to the connector assembly, and the other end of which passes through the circuit board.

[0011] In one embodiment, the first group of pins includes a plurality of first pin bodies, and the second group of pins includes a plurality of second pin bodies. The angle A between the arrangement direction of the plurality of first pin bodies of the first group of pins and the arrangement direction of the plurality of second pin bodies of the second group of pins satisfies 30°≤A≤150°.

[0012] In one embodiment, A equals 90°, or A equals 45°.

[0013] In one embodiment, the cover plate is provided with a connector, and the connector assembly passes through the connector and is fixedly connected to the cover plate.

[0014] In one embodiment, the first set of pins includes at least four first pin bodies, each of which is electrically connected to the coil winding of the stator assembly and the circuit board, respectively.

[0015] In one embodiment, the second set of pins includes at least four second pin bodies, each of which can be electrically connected to a circuit board and an external device, respectively.

[0016] Compared to existing technologies, the electric valve provided in this application, specifically, involves the stator assembly's first set of pins being inserted upwards into the circuit board and soldered after the circuit board is installed inside the housing cavity, with the soldering area located on the upper surface of the circuit board. The connector assembly penetrates from above the cover plate, with its second set of pins inserted downwards into the circuit board and fixed by soldering or crimping. Because the two sets of pins are inserted in opposite directions and their projection areas do not overlap, the connector assembly does not obstruct the soldering area of ​​the first set of pins in the stator assembly during assembly, allowing operators to clearly observe the soldering position and ensure soldering quality. For example, the projection of the first set of pins is located on the left side of the circuit board, and the projection of the second set of pins is located on the right side of the circuit board, with a distance between them greater than the pin diameter, avoiding spatial interference.

[0017] Compared with the existing technology, the existing solution blocks the soldering area of ​​the first set of pins because the connector component blocks the soldering area of ​​the first set of pins of the stator assembly. However, after the connector component is installed, the projection position of the connector component on the circuit board is separated from the soldering area of ​​the first set of pins of the stator assembly on the circuit board, so that the first set of pins of the stator assembly can be soldered.

[0018] Furthermore, through the above technical solution, this application enables the first set of pins of the stator assembly to be reliably soldered to the circuit board, avoiding the risk of contact failure caused by relying solely on mechanical connections. The spatial separation design of the connector assembly and the stator assembly makes the soldering operation visible and easy to implement, reducing production costs and improving assembly efficiency.

[0019] Furthermore, due to the separate design of the connector assembly and the cover, the second set of pins can be soldered to the circuit board first, then the first set of pins can be soldered to the circuit board, and finally the cover can be put on. In this way, the cover will not obstruct the soldering process during the soldering of the first set of pins to the circuit board, thereby greatly improving the reliability and success rate of the soldering. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of an electromagnetic coil according to an embodiment provided in this application;

[0022] Figure 2 A cross-sectional view of an electromagnetic coil provided in an embodiment of this application;

[0023] Figure 3 A partial structural diagram of an electromagnetic coil provided in this application. Figure 1 ;

[0024] Figure 4 A schematic diagram of the assembly structure of the connector assembly and circuit board according to an embodiment of this application;

[0025] Figure 5 A partial structural schematic diagram of a stator assembly according to an embodiment provided in this application;

[0026] Figure 6 A schematic diagram of the circuit board structure provided in this application;

[0027] Figure 7 A partial structural diagram of an electromagnetic coil provided in this application. Figure 2 ;

[0028] Figure 8 A partial structural diagram of an electromagnetic coil provided in this application. Figure 3 .

[0029] Reference numerals: 100, housing; 110, inner cavity; 111, first partition bar; 200, circuit board; 210, first socket; 220, second socket; 230, third socket; 240, fourth socket; 300, stator assembly; 310, stator housing; 320, first set of pins; 321, first pin body; 330, coil winding; 400, connector assembly; 410, connector housing; 411, second partition bar; 420, second set of pins; 421, second pin body; 500, cover plate; 510, connector port; 600, positioning post; 700, positioning part; 710, positioning piece; 800, grounding pin. Detailed Implementation

[0030] This application provides an electric valve, which includes a valve core (not shown), a valve body (not shown), and an electromagnetic coil. The electromagnetic coil has a stator assembly 300 inside, and the valve body has a rotor assembly (not shown). When the electromagnetic coil is energized and generates a magnetic field, the stator assembly 300 can drive the rotor assembly to rotate, thereby driving the valve core to move to adjust the valve opening of the electric valve, thereby achieving higher control precision.

[0031] The electric valve here can be an automotive electronic expansion valve, specifically used in automotive thermal management systems. The automotive thermal management system also includes a compressor, reversing valve, condenser, and evaporator. Taking the cooling mode as an example, the high-temperature, high-pressure gaseous refrigerant from the compressor enters the condenser outside the vehicle through the reversing valve. After exchanging heat with the outside air, it becomes a medium-temperature, high-pressure liquid refrigerant. After passing through the automotive electronic expansion valve for throttling, it becomes a low-temperature, low-pressure liquid refrigerant. Finally, after absorbing heat from inside the vehicle through the indoor evaporator, it becomes a low-temperature, low-pressure gaseous refrigerant and returns to the compressor, thus completing a cooling cycle.

[0032] The automotive electronic expansion valve achieves throttling through an electromagnetic coil. For example, when the electromagnetic coil is not energized, the valve needle is away from the valve port, and the valve port is open, allowing refrigerant to flow smoothly through it. When the electromagnetic coil is energized, the rotor assembly inside the electronic expansion valve begins to rotate under the drive of the electromagnetic coil, thereby moving the valve needle axially. The magnitude of the magnetic force generated by the electromagnetic coil controls the degree of movement of the valve needle, thus changing the flow area of ​​the valve port and adjusting the refrigerant flow rate at the valve port to match the refrigerant flow rate with the heat load required by the vehicle's thermal management system.

[0033] Please see Figures 1-8In one embodiment, the electromagnetic coil includes a housing 100, a circuit board 200, a connector assembly 400, and a cover plate 500. The circuit board 200 has an A plane facing the cover plate 500 and a B plane facing away from the cover plate 500. The stator assembly 300 is fixedly connected to the housing 100. The stator assembly 300 has a stator housing 310 and a first set of pins 320 electrically connected to the stator housing 310. The first set of pins 320 is inserted into and soldered to the circuit board 200 along a direction from the B plane to the A plane (defined as the first direction). Specifically, the circuit board 200 has a plurality of first sockets 210 arranged in parallel, and the first set of pins 320 is inserted into the circuit board 200 through the first sockets 210.

[0034] Here, housing 100 refers to the supporting structure surrounding circuit board 200 and internal components, which can be injection molded from insulating material. Connector component 400 refers to the interface component that connects to external devices, such as a connector housing 100 that is injection molded.

[0035] It should be noted that, in one embodiment, such as Figure 5 and Figure 6 As shown, the first set of pins 320 includes at least four first pin bodies 321 electrically connected to the coil windings 330 of the stator assembly 300; that is, the number of first pin bodies 321 is greater than or equal to four. Correspondingly, the number of first sockets 210 is also at least four, and the first sockets 210 and the first pin bodies 321 are arranged in a one-to-one correspondence. Specifically, the first set of pins 320 can be designed as through-hole pins, for example, the first pin bodies 321 are made of copper and are soldered to the circuit board 200 through the first sockets 210.

[0036] The first needle body 321 is a metal conductor between the designated sub-assembly 300 and the circuit board 200 used to conduct the coil winding 330.

[0037] Specifically, the second pin 421 is inserted into the through hole on the other side of the circuit board 200 in a single row straight arrangement, and its end forms a detachable contact with the female end of the external connector through an elastic buckle, thereby realizing the modular docking between the external control signal and the circuit board 200.

[0038] However, this is not the only embodiment; in other embodiments, the number of first needle bodies 321 may also be two or three.

[0039] like Figures 2-4As shown, the housing 100 has an inner cavity 110, the circuit board 200 is disposed in the inner cavity 110, and the cover plate 500 covers the opening of the inner cavity 110. The connector assembly 400 has a connector housing 410 and a second set of pins 420 fixed to the connector housing 410. The connector housing 410 is mainly an injection molded part, and the second set of pins 420 is embedded in the connector housing 410 by injection molding. The stator assembly 300 and the connector assembly 400 are respectively disposed on the upper and lower sides of the circuit board 200. Of course, depending on the change of the installation direction of the electromagnetic coil, the stator assembly 300 and the connector assembly 400 can also be installed on the left and right sides or the front and rear sides of the circuit board 200, or other relative installation positions. One end of the connector assembly 400 is fixedly inserted through the connector housing 410 and is separately disposed from the cover plate 500. The other end is inserted into and electrically connected to the circuit board 200 through the second set of pins 420 along the direction from plane A to plane B (defined as the second direction). Obviously, the first direction and the second direction are opposite. Specifically, the circuit board 200 is provided with a plurality of second sockets 220 arranged in parallel. The second set of pins 420 is inserted into the circuit board 200 through the second sockets 220.

[0040] Specifically, the second set of pins 420 is soldered or press-fitted to the circuit board 200.

[0041] Soldering refers to the process of melting solder at high temperatures to form a fixed electrical connection between the second set of pins 420 and the circuit board 200, ensuring a stable bond between them. When the second set of pins 420 is soldered, pads or tin-plated areas can be pre-set at the ends of the pins 420. Heating melts the solder and covers the contact area between the pins 420 and the circuit board 200, forming a permanent electrical connection after cooling.

[0042] Press-fit connection refers to using mechanical pressure to create an interference fit or elastic contact between the second set of pins 420 and the circuit board 200. This can be achieved using a snap-fit ​​structure or elastic clamping device, enabling electrical connection without the use of solder. When using press-fit connection, the ends of the second set of pins 420 can be designed as elastic contact pieces or barbed plug structures. External force is used to press the second set of pins 420 into the through holes or slots of the circuit board 200, achieving reliable contact through elastic deformation or mechanical engagement. Both methods avoid the contact problems caused by relying solely on interference fits.

[0043] This solution allows the second set of pins 420 to be connected by either soldering or press-fitting. Soldering eliminates the risk of unstable contact resistance, while press-fitting retains the flexibility of non-soldered assembly. In the prior art, the second set of pins 420 and the circuit board 200 only have a single connection method, while this solution, through the combination or selection of two connection methods, can adapt to the reliability requirements of different application scenarios.

[0044] It should be noted that, in one embodiment, such as Figure 4 and Figure 6 As shown, the second set of pins 420 includes at least four second pin bodies 421, each capable of electrically connecting the circuit board 200 and an external device. That is, the number of second pin bodies 421 is greater than or equal to four. Correspondingly, the number of second sockets 220 is also at least four, and the second sockets 220 and second pin bodies 421 are arranged in a one-to-one correspondence. Specifically, the second pin bodies 421 of the second set of pins 420 can be designed with bent pins, such as an L-shaped structure, inserted into the circuit board 200 in the opposite direction.

[0045] However, this is not the only embodiment; in other embodiments, the number of second needle bodies 421 may also be two or three.

[0046] like Figure 3 As shown, the position of the first set of pins 320 on plane A of circuit board 200 does not coincide with the orthographic projection of connector assembly 400 on plane A.

[0047] It should be noted that non-overlapping can be achieved through staggered arrangement or angular offset.

[0048] Specifically, after the circuit board 200 is installed in the inner cavity 110 of the housing 100, the first set of pins 320 of the stator assembly 300 is inserted vertically upward into the circuit board 200 and soldered, with the soldering area located on the upper surface of the circuit board 200. The connector assembly 400 passes through from above the cover plate 500, and its second set of pins 420 is inserted vertically downward into the circuit board 200 and fixed by soldering or crimping. Since the insertion directions of the two sets of pins are opposite, and the position of the first set of pins 320 on plane A of the circuit board 200 does not coincide with the orthographic projection of the connector assembly 400 on plane A, the connector assembly 400 will not obstruct the soldering area of ​​the first set of pins 320 of the stator assembly 300 during assembly. Operators can clearly observe the soldering position to ensure soldering quality. For example, the projection of the first set of pins 320 is located on the left side of the circuit board 200, and the projection of the second set of pins 420 is located on the right side of the circuit board 200, with the distance between them greater than the pin diameter to avoid spatial interference.

[0049] Compared to existing technologies, current solutions are forced to use an interference fit mechanical fixing method because the connector assembly 400 obstructs the soldering area. This solution, however, uses a pin layout with opposite directions and misaligned projections to separate the soldering areas of the connector assembly 400 and the stator assembly 300, allowing for soldering. For example, traditional fisheye pins require precision stamping and extrusion insertion into the circuit board 200, while this solution allows the use of standard through-hole pins, enabling connection through conventional soldering equipment and reducing process complexity.

[0050] Furthermore, through the above technical solution, this application enables the first set of pins 320 of the stator assembly 300 to be reliably soldered to the circuit board 200, avoiding the risk of contact failure caused by relying solely on mechanical connections. The spatial separation design of the connector assembly 400 and the stator assembly 300 makes the soldering operation visible and easy to implement, while eliminating the need for special pin structures, reducing production costs and improving assembly efficiency. For example, in temperature cycling tests, the contact resistance stability of the first set of pins 320 in the soldered connection is better than that of the traditional extrusion connection, thereby improving the reliability of the electromagnetic coil under complex operating conditions.

[0051] Furthermore, since the connector assembly 400 and the cover are separate components, the second set of pins 420 and the circuit board 200 can be soldered first, then the first set of pins 320 and the circuit board 200 can be soldered, and finally the cover can be put on. In this way, the cover will not obstruct the soldering process during the soldering of the first set of pins 320 and the circuit board 200, thereby greatly improving the reliability and success rate of the soldering.

[0052] In one embodiment, the angle A between the arrangement direction of the plurality of first needle bodies 321 of the first group of needles 320 and the arrangement direction of the plurality of second needle bodies 421 of the second group of needles 420 satisfies 30°≤A≤150°.

[0053] The arrangement direction refers to the linear trajectory formed by connecting the axes of multiple pins (including the first pin 321 and the second pin 421) on the plane of the circuit board 200. This can be achieved using a straight or curved arrangement, with different arrangement directions creating spatial distribution differences to solve the problem of soldering area obstruction. Angle A refers to the angle between the arrangement directions of the first group of pins 320 and the second group of pins 420 on the plane of the circuit board 200. This can be achieved using an orthogonal or oblique arrangement, with angle control enabling a non-overlapping distribution of the pin soldering areas.

[0054] Specifically, when the first pin 321 is arranged laterally along the left edge of the circuit board 200, the second pin 421 can be designed to be arranged longitudinally or diagonally. For example, a second set of pins 420 arranged longitudinally can be provided in the right side region of the circuit board 200, so that the soldering areas of the first set of pins 320 and the second set of pins 420 are completely separated from the top view. When the arrangement directions of the first set of pins 320 and the second set of pins 420 form a 45-degree angle or a 90-degree angle, their projected areas are staggered along the edge of the circuit board 200, thus providing sufficient operating space for soldering operations.

[0055] Furthermore, the standardized arrangement angle range improves the process compatibility of electromagnetic coil assembly, enabling efficient welding operations without relying on special pin structures.

[0056] In one embodiment, such as Figure 1and Figure 2 As shown, the cover plate 500 is provided with a connector 510. The connector assembly 400 passes through the connector 510 and is fixedly connected to the cover plate 500. Specifically, the cover plate 500 and the connector assembly 400 can be fixedly connected by interference fit or by adhesive bonding.

[0057] The connector 510 refers to the opening structure on the cover plate 500 through which the connector assembly 400 passes. Specifically, it can be implemented using a rectangular or circular hole, the size of which is adapted to the shape of the connector assembly 400. The connector 510 allows the connector assembly 400 to be installed and positioned independently of the cover plate 500, avoiding spatial interference with the pins of the stator assembly 300.

[0058] Specifically, the cover plate 500 and the connector assembly 400 adopt a separate structure design. The connector assembly 400 is fixedly connected after passing through the cover plate 500 via the connector port 510. During assembly, the connector assembly 400 can be pre-installed separately onto the circuit board 200 and then assembled with the cover plate 500, thereby reducing the obstruction of the operating space by other components during the soldering process. The edge of the connector port 510 can be provided with guide grooves or positioning bosses to automatically align the connector assembly 400 when inserted, ensuring that the second set of pins 420 accurately mates with the circuit board 200 in a predetermined direction.

[0059] In one embodiment, such as Figure 7 As shown, the first set of pins 320 includes a plurality of first pin bodies 321. The bottom wall of the inner cavity 110 is provided with a first partition strip 111. One end of the first partition strip 111 away from the bottom wall of the inner cavity 110 protrudes toward the circuit board 200 and stops between adjacent first pin bodies 321.

[0060] The first separator 111 refers to a strip-shaped structure set on the bottom wall of the inner cavity 110 and extending upward to the circuit board 200. Specifically, it can be integrally formed with the shell 100 by injection molding process. It is used to form physical isolation between adjacent first pins 321 to prevent short circuits caused by excessive solder on the back of the circuit board 200 due to sticking.

[0061] In one embodiment, such as Figure 8 As shown, the second set of pins 420 includes a plurality of second pin bodies 421, and the connector assembly 400 also includes a connector housing 410. The second set of pins 420 is fixed to the connector housing 410. The connector housing 410 is provided with a second dividing strip 411. One end of the second dividing strip 411 away from the connector housing 410 protrudes toward the circuit board 200 and stops between adjacent second pin bodies 421.

[0062] It should be noted that the second separator 411 refers to an isolation component that is symmetrical or similar in structure to the first separator 111. It can be formed using the same injection molding process. Its function is to separate the second pin body 421 and prevent short circuits caused by excessive solder on the back of the circuit board 200 during soldering.

[0063] In one embodiment, such as Figure 2 and Figure 3 As shown, the electromagnetic coil also includes multiple positioning posts 600, which are arranged along the outer periphery of the second set of pins 420. Specifically, two or more positioning posts 600 are arranged on both sides of the second set of pins 420. One end of the positioning post 600 is fixedly connected to the connector housing 410 of the connector assembly 400, and the other end passes through the fourth socket 240 of the circuit board 200.

[0064] Specifically, the positioning post 600 can be made by injection molding or metal processing, and it fixes the relative position of the connector assembly 400 and the stator assembly 300 by passing through the circuit board 200.

[0065] Specifically, one end of the positioning post 600 is fixed to the outer periphery of the connector assembly 400 by heat fusion or thread connection, and the other end extends in a direction perpendicular to the circuit board 200 and passes through the preset fourth insertion hole 240, and finally is embedded in the groove or slot of the stator assembly 300.

[0066] Compared with existing technologies, this solution automatically aligns the relative positions of the connector assembly 400 and the stator assembly 300 through the mechanical connection of the positioning post 600, eliminating the need for additional adjustment steps. Furthermore, the guiding and limiting function of the positioning post 600 ensures the consistency of the position of the pins (including the first set of pins 320 and the second set of pins 420) during soldering or press-fitting with the circuit board 200, thereby reducing the risk of poor contact and improving assembly efficiency.

[0067] Furthermore, in one embodiment, the positioning post 600 is provided with a stepped structure on its periphery. When the positioning post 600 passes through the circuit board 200, the positioning post 600 can be stopped on the A plane of the circuit board 200 by the stepped structure.

[0068] This design allows the stepped structure to limit the depth to which the positioning post 600 penetrates the circuit board 200 and improves the fit between the two.

[0069] In one embodiment, such as Figure 3 As shown, the electromagnetic coil also includes a plurality of positioning parts 700. One end of the positioning part 700 is connected to the outer periphery of the connector assembly 400 located in the connector housing 410, and the other end is in contact with the inner wall of the inner cavity 110, so that the connector assembly 400 is limited and engaged with the housing 100 through the positioning part 700.

[0070] Clearly, the positioning part 700 refers to the physical structure used to limit the relative position of the connector assembly 400 and the housing 100. Specifically, it can be implemented using a protrusion, a snap-fit, or a flexible arm structure. During the installation of the connector assembly 400, the positioning part 700 generates mechanical interference through contact with the inner wall of the housing 100, thereby limiting the displacement of the connector assembly 400. In this process, the engagement between the positioning part 700 and the wall of the inner cavity 110 requires no additional fasteners; the connector assembly 400 is fixed solely by the mechanical interference of the structure itself.

[0071] It should be noted that the portion of the outer wall of the stator assembly 300 extending into the inner cavity 110 can also be considered as the inner wall of the inner cavity 110. Therefore, in one embodiment, the positioning part 700 includes a plurality of positioning pieces 710 disposed on the outer periphery of the connector assembly 400. Some of the positioning pieces 710 abut against the inner wall of the housing 100 in the inner cavity 110, and the other portion of the positioning pieces 710 abut against the outer wall of the stator assembly 300 in the inner cavity 110. Furthermore, in order to adapt to the shape of the stator assembly 300, the circuit board 200 is wrapped around the outer periphery of the stator assembly 300 to avoid the stator assembly 300.

[0072] The positioning piece 710 and the connector housing 410 are integrally injection molded. Of course, the two can also be glued or snap-fitted together.

[0073] Through the above technical solution, this application effectively avoids the problem of connection failure between the pin and the circuit board 200 caused by force displacement during the installation or use of the connector assembly 400. At the same time, it simplifies the assembly process, so that the connector assembly 400 can automatically complete the positioning when inserted into the inner cavity 110 of the housing 100, and the alignment accuracy between the pin and the circuit board 200 can be ensured without manual adjustment.

[0074] In one embodiment, such as Figure 3 and Figure 5 As shown, the electromagnetic coil also includes a grounding pin 800. One end of the grounding pin 800 is connected to the stator housing 310 of the stator assembly 300, and the other end is soldered and electrically connected to the circuit board 200. The circuit board 200 is provided with a third socket 230, and the grounding pin 800 is inserted into the third socket 230. The position of the grounding pin 800 on the A plane of the circuit board 200 does not coincide with the orthographic projection of the connector assembly 400 on the A plane.

[0075] The stator housing 310 refers to the metal shell 100 that encloses the coil windings 330 of the stator assembly 300. It can be made of aluminum alloy or copper alloy and formed through stamping or casting processes. When connected to the grounding pin 800, it can shield external interference signals. The grounding pin 800 is a conductive component used to conduct static electricity or interference signals from the stator housing 310 to the circuit board 200. It can be a metal rod or sheet mechanically connected to the stator housing 310 and fixed to the circuit board 200 by welding, thereby forming a stable grounding loop.

[0076] The non-overlapping can be achieved by adjusting the installation position of the grounding pin 800 on the circuit board 200 or changing the arrangement direction of the connector 400, so as to avoid spatial interference between the two.

[0077] During the soldering process, the projection position of the grounding pin 800 remains separate from the pin projection area of ​​the connector assembly 400, allowing the soldering tool to avoid the connector assembly 400 for precise soldering. During assembly, the grounding pin 800 can be bent along the side of the circuit board 200 or inserted vertically to ensure that its projection is always outside the projection range of the connector assembly 400.

[0078] Specifically, in one embodiment, the grounding pin 800 is disposed on one side of the first set of pins 320.

[0079] This application also provides a method for assembling an electromagnetic coil, which is used to assemble the electromagnetic coil described in any of the above embodiments. The assembly method includes the following steps:

[0080] The connector assembly 400 is fixed and electrically connected to the circuit board 200 via the second set of pins 420;

[0081] Place the circuit board 200 in the inner cavity 110 and fix the connector 400 to the housing 100;

[0082] The stator assembly 300 is soldered to the circuit board 200 via a first set of pins 320, and the orthographic projection of the first set of pins 320 on plane A of the circuit board 200 does not coincide with the orthographic projection of the connector assembly 400 on plane A.

[0083] The cover plate 500 is fixedly sleeved on the outer periphery of the second set of pins 420 and fixedly covered at the opening of the inner cavity 110 of the housing 100.

[0084] Through the above technical solution, this application achieves a reliable soldering connection between the first set of pins 320 of the stator assembly 300 and the circuit board 200, avoiding the contact problems caused by mechanical crimping alone. At the same time, the electromagnetic coil can still maintain stable electrical connection performance under temperature change conditions.

[0085] In one embodiment, the circuit board 200 is first soldered to the outside of the housing 100 and to the second set of pins 420. The soldering position of the circuit board 200 and the second set of pins 420 is the B plane of the circuit board 200 (that is, the side facing away from the connector assembly 400). Then, the circuit board 200 is placed in the inner cavity 110 of the housing 100 and soldered to the first set of pins 320 in the inner cavity 110. The soldering position of the circuit board 200 and the first set of pins 320 is the A plane of the circuit board 200 (that is, the side facing the connector assembly 400).

[0086] Specifically, during assembly, the connector assembly 400 and circuit board 200 are first independently soldered outside the housing 100. At this time, the circuit board 200 is not installed into the inner cavity 110 of the housing 100, and the soldering area is fully exposed, facilitating precise machining of the soldering points of the second set of pins 420 by operators or equipment. Subsequently, the circuit board 200 with the connector assembly 400 soldered on is installed into the inner cavity 110 of the housing 100. At this time, the side of the circuit board 200 facing the connector assembly 400 is aligned with the first set of pins 320 of the stator assembly 300, and soldering is performed on this side through the opening of the housing 100. Since the two soldering operations are completed independently on both sides of the circuit board 200, and the soldering sequence is optimized, the problem of the stator assembly 300 pins not being effectively soldered due to obstruction by the connector assembly 400, as seen in the prior art, is avoided.

[0087] Compared with existing technologies, this method separates the soldering operations of the two sets of pins to both sides of the circuit board 200 through a step-by-step soldering strategy, and adjusts the soldering position by utilizing the assembly sequence of the housing 100, thereby effectively ensuring the soldering quality.

[0088] In another embodiment, the circuit board 200 is first inserted and fixed to the second set of pins 420 outside the housing 100. Then, the circuit board 200 is placed in the inner cavity 110 of the housing 100 and the circuit board 200 is soldered and fixed to the first set of pins 320 in the inner cavity 110. The soldering position of the circuit board 200 and the first set of pins 320 is plane A of the circuit board 200.

[0089] Specifically, during assembly, the connector assembly 400 and circuit board 200 are first connected and fixed outside the housing 100. At this time, the circuit board 200 is not restricted by the space of the housing 100, and the operator can position the second set of pins 420 in an open environment. After the connection is completed, the connector assembly 400 and circuit board 200 assembly is installed inside the housing 100. At this time, the circuit board 200 is in the inner cavity 110, and soldering is performed on the stator assembly 300 through the first set of pins 320. Since the soldering position is located on the side of the circuit board 200 facing the connector assembly 400, the operator can directly contact the solder joint without having to go around the circuit board 200, thus ensuring the working space of the soldering tools.

[0090] In another embodiment, the circuit board 200 is first installed in the inner cavity 110 of the housing 100. Then, the circuit board 200 is inserted and fixed in the inner cavity 110 of the housing 100 with the second set of pins 420. The circuit board 200 is soldered and fixed in the housing 100 with the first set of pins 320. The soldering position of the circuit board 200 and the first set of pins 320 is plane A of the circuit board 200.

[0091] Specifically, during assembly, the connector assembly 400 and circuit board 200 are first connected and fixed to the inner cavity 110 of housing 100 via the second set of pins 420, thus initially constraining the position of the connector assembly 400 relative to housing 100. Then, the first set of pins 320 of stator assembly 300 is passed through circuit board 200 and soldered on the side of circuit board 200 facing connector assembly 400. Since the soldering operation surface is located in the unobstructed area between connector assembly 400 and stator assembly 300, there is ample operating space, allowing direct soldering of the first set of pins 320, avoiding the soldering difficulties caused by the excessive size of connector assembly 400 in existing technologies.

[0092] This application also provides an electric valve, which includes the electromagnetic coil described in any of the above embodiments.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

[0095] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0096] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0097] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0098] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0099] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0100] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. An electrically operated valve characterised in that, The device includes a valve core, a valve body, and an electromagnetic coil. The electromagnetic coil contains a stator assembly (300), and the valve body contains a rotor assembly. When the electromagnetic coil is energized and generates a magnetic field, the stator assembly (300) can drive the rotor assembly to rotate, thereby moving the valve core to adjust the valve opening of the electric valve. The electromagnetic coil includes a housing (100), a circuit board (200), a connector assembly (400), and a cover plate (500). The circuit board (200) has an A plane facing the cover plate (500) and a B plane facing away from the cover plate (500). The stator assembly (300) has a first set of pins (320) which are inserted into and soldered to the circuit board (200) along a direction from the B plane to the A plane. The housing (100) has an inner cavity (110), the circuit board (200) is disposed in the inner cavity (110), and the cover plate (500) covers the opening of the inner cavity (110). The connector assembly (400) has a second set of pins (420). The connector assembly (400) is fixed to the cover plate (500) and is separately disposed from the cover plate (500). The second set of pins (420) is inserted into the circuit board (200) along the direction from plane A to plane B and is electrically connected to the circuit board (200). The position of the first set of pins (320) on plane A of the circuit board (200) does not coincide with the orthographic projection of the connector assembly (400) on plane A.

2. The electric valve according to claim 1, characterized in that, The second set of pins (420) is soldered to the circuit board (200); Alternatively, the second set of pins (420) can be press-fitted to the circuit board (200).

3. The electric valve according to claim 1, characterized in that, The electromagnetic coil also includes a grounding pin (800), one end of which is connected to the stator housing (310) of the stator assembly (300), and the other end is soldered and electrically connected to the circuit board (200). The position of the grounding pin (800) on the circuit board (200) in plane A does not coincide with the orthographic projection of the connector assembly (400) in plane A.

4. The electric valve according to claim 1, characterized in that, The electromagnetic coil also includes a plurality of positioning parts (700), one end of which is connected to the outer periphery of the connector assembly (400), and the other end is in contact with the inner wall of the inner cavity (110) so that the connector assembly (400) can be limited and engaged with the housing (100) through the positioning parts (700).

5. The electric valve according to claim 4, characterized in that, The positioning part (700) includes a plurality of positioning pieces (710) disposed on the outer periphery of the connector assembly (400). A portion of the positioning pieces (710) abut against the inner wall of the housing (100), and another portion of the positioning pieces (710) abut against the outer wall of the stator assembly (300) extending into the inner cavity (110).

6. The electric valve according to claim 1, characterized in that, The electromagnetic coil also includes a plurality of positioning posts (600), one end of which is fixedly connected to the connector assembly (400), and the other end is inserted through the circuit board (200).

7. The electric valve according to claim 1, characterized in that, The first group of pins (320) includes a plurality of first pin bodies (321), and the second group of pins (420) includes a plurality of second pin bodies (421). The angle A between the arrangement direction of the plurality of first pin bodies (321) of the first group of pins (320) and the arrangement direction of the plurality of second pin bodies (421) of the second group of pins (420) satisfies 30°≤A≤150°.

8. The electric valve according to claim 7, characterized in that, A equals 90°, or A equals 45°.

9. The electric valve according to claim 1, characterized in that, The cover plate (500) is provided with a connector (510), and the connector assembly (400) passes through the connector (510) and is fixedly connected to the cover plate (500).

10. The electric valve according to claim 1, characterized in that, The first set of pins (320) includes at least four first pin bodies (321), each of which can be electrically connected to the coil winding (330) of the stator assembly (300) and the circuit board (200). And / or, the second set of pins (420) includes at least four second pin bodies (421), each of which is capable of electrically connecting the circuit board (200) and an external device respectively.

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