Solenoid valve and carbon can module

Abstract

This invention belongs to the field of fluid control element technology, specifically providing a solenoid valve and a carbon canister module. The solenoid valve of this invention includes a valve body having a first inlet and a second inlet and a valve core for controlling the on / off connection between the first and second inlets and outlets. The valve body includes a shell, a magnetic yoke, a coil assembly, and a stationary iron core, distributed sequentially from the outside to the inside; the first and second inlets and outlets are respectively formed at both ends of the shell in the axial direction. The valve body defines an airflow channel connecting the first and second inlets and outlets, the airflow channel including a heat dissipation section formed between the shell and the magnetic yoke and a rectification section located between the heat dissipation section and the second inlet and outlet. The valve body also includes a rectification member arranged within the rectification section, so that the airflow from the second inlet and outlet to the first inlet and outlet is rectified by the rectification member within the rectification section and flows uniformly to the heat dissipation section, uniformly cooling the coil assembly. The solenoid valve of this invention improves the heat dissipation effect of the coil assembly.

Description

Technical Field

[0001] This invention belongs to the field of fluid control component technology, and specifically provides a solenoid valve and a carbon canister module. Background Technology

[0002] Solenoid valves are widely used in the automotive industry. For example, they are used in suspension systems to control the stiffness of air springs; and in automotive fuel evaporative emission control systems to control the connection between the carbon canister and the engine.

[0003] Existing solenoid valves generally consist of a valve body, a valve core, and a return spring. The valve body defines a first inlet and a second inlet and has a coil assembly. When the coil assembly is energized, electromagnetic force drives the valve core to move, thereby controlling the opening and closing of the air passage between the first and second inlets and outlets. When the coil assembly is de-energized, the return spring drives the valve core to its initial position and maintains it in that position.

[0004] When the coil assembly is energized, especially when it needs to be kept energized for a long time, the coil assembly will generate a lot of heat due to the Joule effect of the current, resulting in high temperature and severe overheating. This phenomenon not only causes the electromagnetic force of the coil assembly to weaken, but also accelerates the aging, embrittlement, and even damage of the coil insulation, leading to short circuits, burning failure, and other problems. Summary of the Invention

[0005] One objective of this invention is to solve the problem of excessive heat generation in the coil assembly of a solenoid valve during operation.

[0006] To achieve the above objectives, the present invention provides a solenoid valve in a first aspect, comprising a valve body having a first inlet and a second inlet and a valve core for controlling the opening and closing of the first inlet and the second inlet and the second inlet; the valve body comprises a housing, a magnetic yoke, a coil assembly, and a stationary iron core distributed sequentially from the outside to the inside; the first inlet and the second inlet and the second inlet and the third inlet and the fourth inlet and the fifth inlet and the sixth inlet and the seventh inlet and the eighth inlet and the ninth inlet and the tenth inlet and the ellipse being respectively formed at both ends in the axial direction of the housing; the valve body defines an airflow passage connecting the first inlet and the second inlet and the sixth inlet and the ellipse, the airflow passage comprising a heat dissipation section formed between the housing and the magnetic yoke and a rectification section located between the heat dissipation section and the second inlet and the ellipse; the valve body further comprises a rectification member disposed in the rectification section, such that the airflow flowing from the second inlet and the sixth inlet and the first inlet and the seventh inlet and the eighth inlet and the ellipse are rectified by the rectification member in the rectification section and flow uniformly to the heat dissipation section, thereby uniformly cooling the coil assembly.

[0007] Optionally, the rectifier component includes a rectifier mesh and a mounting bracket for fixing the rectifier mesh; the outer side of the mounting bracket is provided with a snap-fit ​​structure, which snaps or interferes with the peripheral wall of the rectifier section to fix the rectifier component within the rectifier section.

[0008] Optionally, the axial end of the retainer away from the snap-fit ​​structure abuts against the housing; the snap-fit ​​structure is a conical annular structure that extends radially outward in a direction away from the second inlet and outlet, and is interference-fitted with the peripheral wall of the rectifying section; and / or, the retainer is a structure made of an elastic material.

[0009] Optionally, the magnetic yoke defines a mounting cavity with an open end, the mounting cavity being used to arrange the coil assembly and the stationary iron core, the side wall of the mounting cavity being provided with a heat dissipation notch communicating with the heat dissipation section, so that the gas flowing in the heat dissipation section forms convection with the gas in the mounting cavity, thereby improving the heat dissipation efficiency of the coil assembly.

[0010] Optionally, the heat dissipation notch extends axially through the magnetic yoke, such that the heat dissipation notch includes a region formed on the peripheral wall of the mounting cavity and a region formed on the bottom wall of the mounting cavity, thereby making the heat dissipation notch L-shaped.

[0011] Optionally, the heat dissipation section includes an annular cavity located radially between the housing and the yoke; and / or, the rectification section is located axially between the yoke and the second inlet / outlet.

[0012] Optionally, the inner side of one axial end of the housing is provided with an annular protrusion extending inward along the axial direction, and the annular protrusion communicates with the first inlet and outlet; the valve core includes a moving iron core for attracting the stationary iron core and / or the magnetic yoke, a sealing structure for abutting the annular protrusion, and a sealing sleeve that fits with the stationary iron core.

[0013] Optionally, the sealing sleeve extends from the moving iron core toward the side away from the annular protrusion; and the diameter of the end of the sealing sleeve near the moving iron core is larger than the diameter of the portion of the sealing sleeve that fits with the stationary iron core.

[0014] Optionally, the sealing sleeve includes a first axial extension section and a radial extension section, the radial extension section extending radially inward from the end of the first axial extension section away from the moving iron core; the stationary iron core is provided with an annular groove, the inner end of the radial extension section is inserted into the annular groove to snap the sealing sleeve onto the stationary iron core.

[0015] Optionally, the sealing sleeve further includes a second axial extension, which extends from the inner end of the radial extension in a direction away from the first axial extension; the axial end face of the annular groove away from the first axial extension is a tapered surface that seals against the second axial extension.

[0016] Optionally, the stationary iron core is provided with two annular shoulders to define the annular groove; one of the two annular shoulders, away from the valve core, has a tapered surface formed on it and abuts against the end of the coil assembly near the valve core; the end of the stationary iron core away from the valve core passes through the end of the magnetic yoke away from the valve core and is riveted to the magnetic yoke.

[0017] Optionally, the moving iron core can be attracted by both the magnetic yoke and the stationary iron core when the coil assembly is energized, thereby increasing the electromagnetic driving force of the moving iron core.

[0018] Optionally, the sealing structure and the sealing sleeve are integrally molded onto the moving iron core using an injection molding process.

[0019] Optionally, the sealing structure is configured as annular; the moving iron core is provided with a pressure balance hole, one end of which extends to the radial inner side of the sealing structure, and the other end of which extends to the radial inner side of the sealing sleeve.

[0020] Optionally, the outer casing includes a top shell defining the first inlet and a bottom shell defining the second inlet and a bottom shell; the magnetic yoke is radially fixedly connected to at least one of the top shell and the bottom shell, and is axially clamped by the top shell and the bottom shell; the top shell and the bottom shell are fixedly connected.

[0021] Optionally, the inner peripheral wall of the bottom shell is provided with a plurality of vertical ribs spaced apart along its circumference; the magnetic yoke abuts against the portion of the vertical ribs away from the top shell, so that the top space between the magnetic yoke and the bottom shell is annular.

[0022] Optionally, the magnetic yoke is provided with a fixing ring extending radially outward at one end near the top shell, and the fixing ring is clamped axially by the top shell and the bottom shell.

[0023] In a second aspect, the present invention provides a carbon canister module, comprising a carbon canister and an electromagnetic valve mounted on the carbon canister, wherein the electromagnetic valve is the electromagnetic valve described in any one of the first aspects.

[0024] Optionally, the carbon canister module further includes a one-way valve installed on the end of the solenoid valve having the first inlet and outlet, the one-way valve being in communication with the first inlet and outlet.

[0025] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of the present invention, by defining an airflow channel connecting the first inlet and outlet with the second inlet and outlet within the valve body, and by including a heat dissipation section formed between the outer shell and the magnetic yoke and a rectification section located between the heat dissipation section and the second inlet and outlet, and by arranging rectification components within the rectification section, the airflow from the second inlet and outlet to the first inlet and outlet is rectified by the rectification components within the rectification section and can then flow uniformly to the heat dissipation section, thereby uniformly cooling the coil assembly. Therefore, the present invention overcomes the problem of severe overheating of the coil assembly of the solenoid valve during operation.

[0026] In particular, the rectifier component disperses the airflow into a uniform pattern, preventing localized large or small airflows within the heat dissipation zone. This avoids situations where some areas of the coil assembly have good heat dissipation while others have poor heat dissipation. In other words, the rectifier component improves the heat dissipation of the coil assembly in the solenoid valve.

[0027] Because the rectifier disperses the airflow passing through it, it can also absorb turbulence noise and weaken whistling sound, thereby reducing wind noise when the solenoid valve opens. It can also reduce wind speed, preventing excessive wind noise caused by excessive local wind speed.

[0028] At the same time, the rectifier can also act as a filter to prevent foreign objects from entering the downstream of the rectifier section and affecting the valve core's closing effect.

[0029] Furthermore, by providing a snap-fit ​​structure on the outer radial side of the fixing frame of the rectifier component, and by snapping or interfering with the peripheral wall of the rectifier section, the rectifier component can be fixed within the rectifier section.

[0030] Furthermore, by setting the snap-fit ​​structure as a conical annular structure and extending it radially outward away from the second inlet and outlet, and by providing an interference fit with the peripheral wall of the rectifier section, the air pressure on the rectifier component during solenoid valve operation forces the snap-fit ​​structure to tightly press against the peripheral wall of the rectifier section, thus ensuring the stability of the rectifier component during operation and preventing it from loosening during solenoid valve use.

[0031] Other beneficial effects of the present invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the improved objectives, features and advantages of the present invention. Attached Figure Description

[0032] To more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that the same reference numerals may indicate the same or similar parts or components in different drawings; the drawings of the present invention are not necessarily drawn to scale. In the drawings: Figure 1 These are exploded views (first isometric view) of the solenoid valve in some embodiments of the present invention. Figure 2 This is an exploded view (second isometric view) of the structure of the solenoid valve in some embodiments of the present invention. Figure 3 This is a perspective view (first axonometric view) of the solenoid valve in some embodiments of the present invention. Figure 4 This is a perspective view (second isometric view) of the solenoid valve in some embodiments of the present invention. Figure 5 yes Figure 3 A cross-sectional view of the solenoid valve along the AA direction (closed state); Figure 6 yes Figure 3 A cross-sectional view of the solenoid valve along the BB direction (open state). Figure 7 yes Figure 6 A cross-sectional view of the solenoid valve along the CC direction; Figure 8 yes Figure 3 Cross-sectional view of the middle bottom shell along the BB direction; Figure 9 These are exploded views (first isometric view) of the valve core in some embodiments of the present invention. Figure 10 These are exploded views (second isometric view) of the valve core structure in some embodiments of the present invention. Figure 11 This is a perspective view of the valve core in some embodiments of the present invention; Figure 12 yes Figure 11 A cross-sectional view of the valve core along the DD direction; Figure 13 yes Figure 11 A cross-sectional view of the valve core along the EE direction; Figure 14 This is an exploded view of the structure of a carbon canister module provided by the present invention; Figure 15 yes Figure 14 Schematic diagram of the assembly effect of the medium carbon canister module; Figure 16 This is a schematic diagram illustrating the assembly effect of another carbon canister module provided by the present invention.

[0033] Explanation of reference numerals in the attached figures: 001. Carbon canister module; 010. Solenoid valve; 020. Carbon canister; 030. Check valve; 100. Valve body; 101. Airflow passage; 1011. Heat dissipation section; 1012. Rectifying section; 110. Outer shell; 1101. First inlet / outlet; 1102. Second inlet / outlet; 111. Top shell; 1111. Annular protrusion; 1112. Rib; 112. Bottom shell; 1121. Flange; 1122. Vertical rib; 1123. Fixing post; 1124. Annular groove; 1125. Abutment protrusion; 120. Magnetic yoke; 121. 1201. Retaining ring; 1202. Mounting cavity; 1203. Heat dissipation notch; 1204. Connecting hole; 130. Coil assembly; 131. Coil bracket; 132. Electromagnetic coil; 133. Pin; 140. Static iron core; 141. Annular shoulder; 1401. Annular groove; 1402. Conical surface; 1403. Blind hole; 150. Rectifying component; 151. Rectifying mesh; 152. Fixing bracket; 1521. Snap-fit ​​structure; 160. Sealing ring; 200. Valve core; 210. Moving iron core; 2101. First process hole; 2102. Air pressure balance hole; 2103. Second process hole; 211. Positioning protrusion; 221. Sealing structure; 2211. Sealing ring; 2212. Abutment ring; 222. Sealing sleeve; 2221. First axial extension section; 2222. Radial extension section; 2223. Second axial extension section; 223. First connecting structure; 224. Pull-in structure; 230. Vibration damping structure; 231. Base part; 232. Second connecting part; 233. Vibration damping part; 300. Return spring; 410. Connector; 401. Fuel vapor inlet port; 402. Desorption outlet port; 403. Atmospheric connection port. Detailed Implementation

[0034] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0035] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the corresponding device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. For example, unless otherwise specified, the terms "installation," "connection," "joining," and "fixing" can specifically refer to any feasible connection form such as bolted connections, screw connections, welding, insertion, riveting, fusion welding, and snap-fitting.

[0037] Furthermore, it should be noted that in the description of this invention, mm represents millimeter, cm represents centimeter, and m represents meter.

[0038] like Figures 1 to 6 As shown, in some embodiments of the present invention, the solenoid valve 010 includes a valve body 100, a valve core 200, and a return spring 300. The valve body 100 defines a first inlet / outlet 1101 and a second inlet / outlet 1102. The valve core 200 is movably disposed within the valve body 100 to control the opening and closing of the air passage between the first inlet / outlet 1101 and the second inlet / outlet 1102. The return spring 300 is disposed within the valve body 100 and located between the valve body 100 and the valve core 200 to drive the valve core 200 to an initial position (e.g., ...). Figure 5 (as shown), and remain in the initial position.

[0039] Continue reading Figures 1 to 6 The valve body 100 includes a housing 110, a magnetic yoke 120, a coil assembly 130, and a stationary iron core 140, arranged sequentially from the outside to the inside. Specifically, the housing 110, magnetic yoke 120, coil assembly 130, and stationary iron core 140 are arranged radially from the outside to the inside. When the coil assembly 130 is energized, a magnetic circuit is generated between the magnetic yoke 120, coil assembly 130, stationary iron core 140, and valve core 200, thereby providing the valve core 200 with a magnetic attraction force that overcomes the elastic force of the return spring 300, thus driving the valve core 200 from... Figure 5Move to the position shown Figure 6 The location shown.

[0040] Continue reading Figures 1 to 6 A first inlet / outlet 1101 and a second inlet / outlet 1102 are formed on the outer casing 110 and are located at opposite ends of the outer casing 110 in the axial direction. Further, the outer casing 110 includes a top shell 111 defining the first inlet / outlet 1101 and a bottom shell 112 defining the second inlet / outlet 1102. A magnetic yoke 120 is radially fixedly connected to at least one of the top shell 111 and the bottom shell 112 and is axially clamped by the top shell 111 and the bottom shell 112. The top shell 111 and the bottom shell 112 are fixedly connected.

[0041] Specifically, such as Figure 1 , Figures 5 to 8 As shown, the inner peripheral wall of the bottom shell 112 is provided with a plurality of vertical ribs 1122 distributed at intervals along its circumference. The magnetic yoke 120 abuts against the portion of the vertical ribs 1122 away from the top shell 111, so that the top space between the magnetic yoke 120 and the bottom shell 112 is annular.

[0042] In this invention, the bottom shell 112 can be formed by injection molding, and the vertical ribs 1122 can have draft angles so that the inscribed circles of the multiple vertical ribs 1122 gradually increase in size towards the top shell 111. This causes the magnetic yoke 120, as it is inserted into the bottom shell 112, to first have a clearance fit with the vertical ribs 1122, then circumferential contact, or even an interference fit, thereby fixing the magnetic yoke 120 to the bottom shell 112 radially.

[0043] In addition, in other embodiments of the present invention, those skilled in the art may, as needed, provide a radial limiting structure (e.g., a protrusion) on the top shell 111 so that the top shell 111 is radially fixedly connected to the magnetic yoke 120 through the radial limiting structure.

[0044] like Figure 5 and Figure 6 As shown, the top shell 111 is inserted into the bottom shell 112, and the top shell 111 and the bottom shell 112 can be clearance-fitted or interference-fitted. After the top shell 111 is inserted into the bottom shell 112, the top shell 111 and the bottom shell 112 can also be fixed together by riveting, welding, bonding, snap-fitting, etc., to prevent the top shell 111 and the bottom shell 112 from loosening during the operation of the solenoid valve 010.

[0045] Of course, those skilled in the art can also fix the top shell 111 and the bottom shell 112 together by means of a threaded connection as needed. For example, an external thread can be provided on the top shell 111 and an internal thread can be provided on the bottom shell 112, so that the top shell 111 and the bottom shell 112 are threaded together by the external thread and the internal thread.

[0046] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, the inner peripheral wall of the top shell 111 is provided with a plurality of circumferentially spaced protrusions 1112, and the inner peripheral wall of the bottom shell 112 is provided with a plurality of circumferentially spaced fixing posts 1123. With the solenoid valve 010 assembled, the top shell 111 and the bottom shell 112 clamp the magnetic yoke 120 together through the protrusions 1112 and the fixing posts 1123. Specifically, the fixing ring 121 of the magnetic yoke 120 is clamped. The fixing ring 121 of the magnetic yoke 120 will be described in detail later.

[0047] like Figures 5 to 8 As shown, an annular protrusion 1111 extending axially inward is provided on the inner side of one end of the outer casing 110. The annular protrusion 1111 communicates with the first inlet / outlet 1101. The annular protrusion 1111 can be coaxial with the first inlet / outlet 1101 so that the annular protrusion 1111 forms part of the peripheral wall of the first inlet / outlet 1101.

[0048] like Figure 5 and Figure 6 As shown, the valve core 200 controls the opening and closing of the air passage between the first inlet / outlet 1101 and the second inlet / outlet 1102 by contacting and separating from the annular protrusion 1111.

[0049] like Figure 5 and Figure 6 As shown, a radial gap is formed between the housing 110 and the moving iron core 210 to allow fluid to flow through this radial gap from one of the first inlet / outlet 1101 and the second inlet / outlet 1102 to the other. Specifically, the valve body 100 defines an airflow passage 101 that communicates the first inlet / outlet 1101 and the second inlet / outlet 1102. The airflow passage 101 includes a heat dissipation section 1011 formed between the housing 110 and the yoke 120 to reduce the heat generation of the coil assembly 130 by the gas flowing within the heat dissipation section 1011.

[0050] Those skilled in the art will understand that by reducing the heat generation of the coil assembly 130, the phenomenon of severe overheating during the operation of the coil assembly 130 of the solenoid valve 010 is avoided.

[0051] As described above, since the top space between the yoke 120 and the bottom shell 112 is annular, the heat dissipation section 1011 includes an annular cavity located radially between the outer shell 110 and the yoke 120, so that the airflow can uniformly contact the yoke 120 and the coil assembly 130 inside the yoke 120 in the circumferential direction through the annular cavity, thereby uniformly cooling the coil assembly 130.

[0052] Continue reading Figure 5 and Figure 6 The airflow passage 101 may also include a rectifier section 1012 located between the heat dissipation section 1011 and the second inlet / outlet 1102. The rectifier section 1012 is located axially between the magnetic yoke 120 and the second inlet / outlet 1102 to facilitate the machining of the housing 110 and the assembly of the solenoid valve 010.

[0053] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the valve body 100 also includes a rectifier 150 arranged in the rectifier section 1012, so that the airflow from the second inlet / outlet 1102 to the first inlet / outlet 1101 is rectified by the rectifier 150 in the rectifier section 1012 and then flows evenly to the heat dissipation section 1011 to uniformly cool the coil assembly 130.

[0054] Those skilled in the art will understand that the rectifier 150 disperses the airflow passing through it into a uniform shape, preventing localized large and small airflows within the heat dissipation section 1011, which would otherwise result in some areas of the coil assembly 130 having good heat dissipation while others have poor heat dissipation. In other words, the rectifier 150 improves the heat dissipation effect of the coil assembly 130 in the solenoid valve 010.

[0055] Furthermore, because the rectifier component 150 disperses the airflow passing through it, it can also absorb turbulence noise and weaken whistling sound, thereby reducing wind noise when the solenoid valve 010 is opened. It can also reduce wind speed and prevent excessive wind noise caused by excessive local wind speed.

[0056] At the same time, the rectifier component 150 can also serve as a filter to prevent foreign objects from entering the downstream of the rectifier section 1012 and affecting the closing effect of the valve core 200.

[0057] like Figure 1 and Figure 2 As shown, the rectifier 150 includes a rectifier mesh 151 and a mounting bracket 152 for fixing the rectifier mesh 151. A snap-fit ​​structure 1521 is provided on the outer side of the mounting bracket 152 in the radial direction. The snap-fit ​​structure 1521 snaps or interferes with the peripheral wall of the rectifier section 1012 to fix the rectifier 150 in the rectifier section 1012.

[0058] Those skilled in the art will understand that by providing a snap-fit ​​structure 1521 on the outer radial side of the fixing frame 152 of the rectifier component 150, and by snapping or interfering the snap-fit ​​structure 1521 with the peripheral wall of the rectifier section 1012, the rectifier component 150 can be fixed in the rectifier section 1012.

[0059] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the axial end of the mounting bracket 152 away from the snap-fit ​​structure 1521 abuts against the housing 110. The snap-fit ​​structure 1521 is a conical annular structure that extends radially outward in a direction away from the second inlet / outlet 1102 and is interference-fitted with the peripheral wall of the rectifier section 1012.

[0060] Furthermore, the fixing frame 152 is a structure made of elastic material (such as elastic plastic, metal, etc.), and the outer diameter of the large diameter end of the snap-fit ​​structure 1521 is larger than the inner diameter of the rectifier section 1012, so as to ensure that the snap-fit ​​structure 1521 can be embedded in the rectifier section 1012 and have an interference fit with the peripheral wall of the rectifier section 1012.

[0061] Those skilled in the art will understand that by setting the snap-fit ​​structure 1521 as a conical annular structure and extending it radially outward away from the second inlet / outlet 1102, and by interfering with the peripheral wall of the rectifier section 1012, the air pressure from the second inlet / outlet 1102 during the use of the solenoid valve 010 forces the snap-fit ​​structure 1521 to tightly press against the peripheral wall of the rectifier section 1012, thereby ensuring the stability of the rectifier component 150 during operation. This prevents the rectifier component 150 from loosening during the use of the solenoid valve 010.

[0062] like Figure 5 , Figure 6 and Figure 8 As shown, the bottom shell 112 is further provided with an abutment protrusion 1125 on the side wall of the rectifying section 1012 near the second inlet / outlet 1102, so that the bottom shell 112 abuts against the axial end of the fixing frame 152 away from the snap-fit ​​structure 1521 through the abutment protrusion 1125. The abutment protrusion 1125 can be a ring structure or at least two protrusions spaced apart.

[0063] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, an annular groove 1124 is provided in the peripheral wall of the second inlet / outlet 1102. The valve body 100 also includes a sealing ring 160 installed in the annular groove 1124, so that the second inlet / outlet 1102 is inserted into the target object (such as...) in a sealed manner through the sealing ring 160. Figures 14 to 16 The carbon canister shown is 020.

[0064] Those skilled in the art will understand that by providing an annular groove 1124 within the peripheral wall of the second inlet / outlet 1102 of the valve body 100, and installing a sealing ring 160 within the annular groove 1124, the solenoid valve 010 can be inserted into the socket 410 of the target object (e.g., through the second inlet / outlet 1102) via the second inlet / outlet 1102. Figures 14 to 16 As shown in the figure, it is sealed with a sealing ring 160, which reduces the number of pipelines, makes installation simpler, and reduces connection costs.

[0065] like Figures 1 to 5 and Figure 7 As shown, a flange 1121 is also provided at one end of the valve body 100 near the second inlet / outlet 1102, so that the solenoid valve 010 is fixed to the target object through the flange 1121.

[0066] Flange 1121 can be fixed to the target object by welding or bonding.

[0067] Alternatively, those skilled in the art can, as needed, fix the flange 1121 to the target object using bolts. Specifically, a through hole is made in the flange 1121, and then bolts are passed through the through hole and tightened into the threaded holes on the target object, thereby fixing the solenoid valve 010 to the target object.

[0068] Alternatively, those skilled in the art may, as needed, provide an internal thread on the inner circumferential surface of the flange 1121, and then fix the solenoid valve 010 to the target object by means of the thread.

[0069] Those skilled in the art will understand that by providing a flange 1121 at one end of the valve body 100 near the second inlet / outlet 1102, and fixing the solenoid valve 010 to the target object through the flange 1121, the reliability of the connection between the valve body 100 and the target object is also ensured, and the connection between the solenoid valve 010 and the target object is prevented from loosening during long-term use.

[0070] In this invention, the target object can be a carbon canister, a connecting block or connecting seat, or a pipe fitting. Those skilled in the art can select a suitable target object according to actual needs.

[0071] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the yoke 120 defines a mounting cavity 1201 with an open end, which is used to arrange the coil assembly 130 and the stationary iron core 140. The side wall of the mounting cavity 1201 is provided with a heat dissipation notch 1202 that communicates with the heat dissipation section 1011, so that the gas flowing in the heat dissipation section 1011 forms convection with the gas in the mounting cavity 1201, thereby improving the heat dissipation efficiency of the coil assembly 130.

[0072] from Figure 1 and Figure 2 As can be seen, the heat dissipation notch 1202 extends through the magnetic yoke 120 along the axial direction, so that the heat dissipation notch 1202 includes a region formed on the peripheral wall of the mounting cavity 1201 and a region formed on the bottom wall of the mounting cavity 1201, thereby making the heat dissipation notch 1202 L-shaped.

[0073] Those skilled in the art will understand that the L-shaped heat dissipation notch 1202 not only improves the convection effect of airflow on both the inner and outer sides of the yoke 120, but also allows some of the gas flowing out from the rectifier section 1012 to flow through the interior of the yoke 120, directly cooling the coil assembly 130. This further improves the heat dissipation efficiency of the coil assembly 130.

[0074] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the opening of the magnetic yoke 120 (the opening of the mounting cavity 1201) is located at the end of the magnetic yoke 120 near the valve core 200. A connection hole 1203 is provided on the bottom wall of the mounting cavity 1201, and the stationary iron core 140 is inserted into the connection hole 1203.

[0075] Furthermore, the stationary iron core 140 is interference-fitted, riveted, welded, or threadedly connected to the magnetic yoke 120. Specifically, the section of the stationary iron core 140 inserted into the connecting hole 1203 is interference-fitted, riveted, welded, or threadedly connected to the magnetic yoke 120.

[0076] Continue reading Figure 1 , Figure 2 , Figure 5 and Figure 6 The magnetic yoke 120 has a fixing ring 121 extending radially outward at one end near the top shell 111. The fixing ring 121 is clamped axially by the top shell 111 and the bottom shell 112. Specifically, it is clamped by the protruding rib 1112 on the top shell 111 and the fixing post 1123 on the bottom shell 112.

[0077] like Figure 1 , Figure 2 , Figures 5 to 7 As shown, the coil assembly 130 includes a coil support 131, an electromagnetic coil 132, and a pin 133. The coil support 131 is sleeved on the stationary iron core 140 and is axially fixed by the stationary iron core 140 and the magnetic yoke 120. The coil assembly 130 is wound around the coil support 131. The pin 133 is electrically connected to the electromagnetic coil 132 and extends through the bottom housing 112 into a plug (not marked in the figure) on the bottom housing 112.

[0078] The pin 133 is sealed to the bottom shell 112 to prevent gaps from forming between the pin 133 and the bottom shell 112, which could lead to gas leakage from the solenoid valve 010.

[0079] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the stationary iron core 140 has two spaced annular shoulders 141, and an annular groove 1401 is defined between the two annular shoulders 141. Furthermore, the outer peripheral surface of each annular shoulder 141 is configured as a tapered surface 1402. A blind hole 1403 is provided at the end of the stationary iron core 140 facing the moving iron core 210, and the return spring 300 is fitted into the blind hole 1403.

[0080] like Figure 5 and Figure 6 As shown, one of the two annular shoulders 141, the one furthest from the valve core 200, abuts against the end of the coil assembly 130 near the valve core 200, specifically against the coil support 131. Thus, the coil support 131 is clamped axially by the annular shoulder 141 and the magnetic yoke 120.

[0081] like Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figures 9 to 13 As shown, the valve core 200 includes a moving iron core 210 for attracting the stationary iron core 140 and / or the magnetic yoke 120, a sealing structure 221 for abutting against the annular protrusion 1111, and a sealing sleeve 222 that fits onto the stationary iron core 140. The sealing structure 221 is located on the side of the moving iron core 210 facing the annular protrusion 1111, and the sealing sleeve 222 is located on the side of the moving iron core 210 away from the annular protrusion 1111.

[0082] Those skilled in the art will understand that by configuring a sealing sleeve 222 that fits onto the stationary iron core 140, the area of ​​the valve core 200 with the sealing sleeve 222 that experiences force (pressure from the air pressure of the second inlet and outlet 1102) is reduced. When the solenoid valve 010 is closed, if the pressure of the second inlet and outlet 1102 is greater than the pressure of the first inlet and outlet 1101, the pressure difference between the two axial sides of the valve core 200 is reduced because the area of ​​the valve core 200 with the sealing sleeve 222 is reduced. This reduces the resistance to opening the solenoid valve 010 and improves its opening capability.

[0083] In some embodiments of the present invention, the moving iron core 210 can be attracted by the magnetic yoke 120 and the stationary iron core 140 simultaneously when the coil assembly 130 is energized, so as to enhance the electromagnetic driving force of the moving iron core 210.

[0084] Those skilled in the art will understand that by enabling the moving iron core 210 to be simultaneously attracted by the magnetic yoke 120 and the stationary iron core 140 when the coil assembly 130 is energized, the attraction area of ​​the moving iron core 210 is increased, thereby enhancing the electromagnetic driving force of the moving iron core 210. Compared with the prior art, the present invention can reduce the operating current of the coil assembly 130 while ensuring that the moving iron core 210 receives the same attraction force, thereby reducing the heat generation of the coil assembly 130 and the energy consumption of the solenoid valve 010.

[0085] Continue reading Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figures 9 to 13 The sealing sleeve 222 extends towards the side away from the annular protrusion 1111 of the automatic iron core 210. Furthermore, the diameter of the end of the sealing sleeve 222 near the moving iron core 210 is larger than the diameter of the portion of the sealing sleeve 222 that fits with the stationary iron core 140, so as to minimize the force-bearing area of ​​the valve core 200 on the side with the sealing sleeve 222.

[0086] like Figure 5 , Figure 6 , Figure 10 , Figure 12 and Figure 13 As shown, the sealing sleeve 222 includes a first axial extension 2221 and a radial extension 2222. The radial extension 2222 extends radially inward from the end of the first axial extension 2221 away from the moving iron core 210. The inner end of the radial extension 2222 engages in the annular groove 1401 on the stationary iron core 140 to engage the sealing sleeve 222 with the stationary iron core 140.

[0087] from Figure 5 and Figure 6 As can be seen, the tapered surface 1402 of the annular shoulder 141 on the stationary iron core 140 is radially outward in the direction away from the moving iron core 210, so as to ensure that the radial extension section 2222 can be smoothly inserted into the annular slot 1401, while also preventing the radial extension section 2222 from detaching from the annular slot 1401.

[0088] Those skilled in the art will understand that the snap-fit ​​between the sealing sleeve 222 and the stationary iron core 140 not only prevents the sealing sleeve 222 from disengaging from the stationary iron core 140 during the movement of the moving iron core 210, but also allows the stationary iron core 140 to provide a certain pulling force to the sealing sleeve 222 to offset part of the air pressure from the second inlet and outlet 1102 on the valve core 200, thereby further reducing the resistance to opening the solenoid valve 010.

[0089] like Figure 5 , Figure 6 , Figure 10 , Figure 12and Figure 13 As shown, the sealing sleeve 222 also includes a second axial extension 2223, which extends from the inner end of the radial extension 2222 in a direction away from the first axial extension 2221.

[0090] from Figure 5 and Figure 6 As can be seen, the axial end face of the annular groove 1401 away from the first axial extension 2221 is a tapered surface 1402 that is in sealing contact with the second axial extension 2223. As described above, this tapered surface 1402 is also Figure 5 and Figure 6 The outer peripheral surface of the annular shoulder 141 at the lower center. That is, Figure 5 and Figure 6 The tapered surface 1402 of the annular shoulder 141 at the lower center extends from the inner peripheral wall of the annular groove 1401 to the bottom surface of the annular shoulder 141.

[0091] Those skilled in the art will understand that by... Figure 5 and Figure 6 The tapered surface 1402 on the annular shoulder 141 at the lower center is configured to extend from the inner peripheral wall of the annular groove 1401 to the bottom surface of the annular shoulder 141, which facilitates the connection between the sealing sleeve 222 and the stationary iron core 140 and ensures the sealing between the sealing sleeve 222 and the stationary iron core 140.

[0092] Furthermore, the sealing structure 221 and the sealing sleeve 222 are integrally molded onto the moving iron core 210 using injection molding process to facilitate injection molding.

[0093] like Figures 9 to 13 As shown, the moving iron core 210 is provided with a plurality of first process holes 2101 passing through it. The valve core 200 also includes a first connecting structure 223 disposed in the first process holes 2101 and connecting the sealing structure 221 and the sealing sleeve 222 together, so as to improve the connection strength between the sealing structure 221 and the sealing sleeve 222 and the moving iron core 210, and prevent gaps from being generated between the sealing structure 221 and the sealing sleeve 222 and the moving iron core 210 during the movement of the valve core 200.

[0094] Furthermore, the sealing structure 221, the sealing sleeve 222, and the first connecting structure 223 are integrally molded onto the moving iron core 210 using injection molding, which facilitates processing and reduces processing costs.

[0095] like Figure 5 , Figure 6 , Figures 9 to 13As shown, the sealing structure 221 is configured as an annular structure. The moving iron core 210 is provided with a pressure balancing hole 2102, one end of which extends to the radial inner side of the sealing structure 221, and the other end of which extends to the radial inner side of the sealing sleeve 222. In this way, the air pressure inside the sealing sleeve 222 can always be equal to the air pressure of the first inlet and outlet 1101, reducing the pressure difference between the two sides of the moving iron core 210 in the axial direction.

[0096] Those skilled in the art will understand that, since the environment in which the solenoid valve 010 is assembled is typically atmospheric pressure, the air pressure inside the sealing sleeve 222 is equal to atmospheric pressure. Without the pressure balancing hole 2102, the high-pressure gas inside the solenoid valve 010 would severely compress the sealing sleeve 222 during operation, reducing its radial dimension and thus its axial force-bearing area. This, in turn, increases the area of ​​the valve core 200 affected by the high-pressure gas inside the solenoid valve 010, leading to increased resistance to opening the solenoid valve 010. The present invention, by providing the pressure balancing hole 2102 on the moving iron core 210, allows the high-pressure gas inside the solenoid valve 010 to enter the sealing sleeve 222, greatly reducing the radial shrinkage deformation of the sealing sleeve 222 and overcoming the aforementioned technical problems.

[0097] like Figure 9 , Figures 11 to 13 As shown, the sealing structure 221 includes a seat ring 2211 that connects to the moving iron core 210 and an abutment ring 2212 located on the side of the seat ring 2211 away from the moving iron core 210, so that the sealing structure 221 abuts against the annular protrusion 1111 through the abutment ring 2212. The radial dimension of the seat ring 2211 is larger than the radial dimension of the abutment ring 2212 to increase the connection strength between the sealing structure 221 and the moving iron core 210. Furthermore, the projection of the abutment ring 2212 onto the seat ring 2211 can be located between the inner and outer circumferential surfaces of the seat ring 2211.

[0098] Continue reading Figure 9 , Figures 11 to 13 The valve core 200 also includes a pull-in structure 224 disposed on the radial inner side of the seat ring 2211. The pull-in structure 224 is connected to the seat ring 2211 and integrally formed to improve the radial deformation resistance of the sealing structure 221.

[0099] In some embodiments of the present invention, the sealing structure 221, the sealing sleeve 222, the first connecting structure 223, and the pull-up structure 224 are all integrally molded onto the moving iron core 210 using an injection molding process to reduce processing costs. Furthermore, the materials of the sealing structure 221, the sealing sleeve 222, the first connecting structure 223, and the pull-up structure 224 can be any feasible elastic material such as rubber or silicone.

[0100] like Figures 9 to 13 As shown, the valve core 200 also includes a shock-absorbing structure 230, which is used to abut against the magnetic yoke 120 to weaken the impact force of the valve core 200 on the valve body 100, thereby reducing the operating noise of the solenoid valve 010.

[0101] from Figure 5 , Figure 6 , Figures 11 to 13 As can be seen, the damping structure 230 is radially distributed on the outside of the sealing structure 221 and the sealing sleeve 222 to ensure that the damping structure 230 can abut against the magnetic yoke 120.

[0102] In addition, those skilled in the art may, as needed, configure the damping structure 230 to abut against the stationary iron core 140, or to abut against both the magnetic yoke 120 and the stationary iron core 140.

[0103] like Figure 9 , Figure 10 and Figure 13 As shown, the moving iron core 210 is provided with a plurality of second process holes 2103 penetrating through it. The damping structure 230 includes a base portion 231 connected in sequence, a number of second connecting portions 232 corresponding to the number of second process holes 2103, and damping portions 233 corresponding to the second connecting portions 232. The base portion 231 and the damping portion 233 are respectively located on both sides of the moving iron core 210 along the axial direction.

[0104] The base portion 231, the second connecting portion 232, and the damping portion 233 are all integrally molded onto the moving iron core 210 using injection molding to reduce processing costs. Furthermore, the base portion 231, the second connecting portion 232, and the damping portion 233 can be made of any feasible elastic material such as rubber or silicone.

[0105] Those skilled in the art will understand that the above-described form of the shock-absorbing structure 230 is not only easy to process, but also can be firmly fixed to the moving iron core 210, making the structure more stable.

[0106] In addition, those skilled in the art may, as needed, configure the shock-absorbing part 233 as an integral ring structure.

[0107] like Figure 5 , Figure 6 , Figures 9 to 13 As shown, in some embodiments of the present invention, the moving iron core 210 is in the form of a sheet. Furthermore, the ratio of the stroke of the moving iron core 210 to its thickness (axial thickness) is selected from any value between 0.3 and 0.9, such as any feasible value like 0.3, 0.4, 0.45, 0.5, 0.59, 0.7, 0.8, 0.85, or 0.9.

[0108] Those skilled in the art will understand that by making the moving iron core 210 plate-shaped, the axial dimension of the moving iron core 210 is reduced, which facilitates the arrangement of the moving iron core 210 within the valve body 100, reduces the mass of the moving iron core 210, and improves the response speed of the moving iron core 210. By selecting the ratio of the stroke of the moving iron core 210 to the thickness of the moving iron core 210 from any value between 0.3 and 0.9, deflection or tilting of the moving iron core 210 during movement is effectively avoided.

[0109] In other embodiments of the present invention, those skilled in the art may, as needed, select any value from 0.7 to 0.85 for the ratio of the stroke of the moving iron core 210 to the thickness of the moving iron core 210.

[0110] Furthermore, in some embodiments of the present invention, the ratio of the height of the damping portion 233 protruding from the moving iron core 210 to the stroke of the valve core 200 is selected from any value from 0.01 to 0.3, in order to avoid the valve core 200 being too thick and to ensure that the moving iron core 210 can be attracted by the magnetic yoke 120 and the stationary iron core 140 at the same time.

[0111] Furthermore, in some embodiments of the present invention, the moving iron core 210 slides in contact with or gap-fits with a plurality of protrusions 1112 on the top shell 111 so as to guide the moving iron core 210 to move through the protrusions 1112, thereby preventing the moving iron core 210 from deflecting or tilting.

[0112] like Figure 5 , Figure 6 , Figure 10 , Figure 12 and Figure 13 As shown, a positioning protrusion 211 is provided on the side of the moving iron core 210 facing the stationary iron core 140. The end of the return spring 300 away from the stationary iron core 140 is sleeved on the outside of the positioning protrusion 211 to restrict the movement of the valve core 200 in the radial direction.

[0113] Those skilled in the art will understand that the cooperation between the sealing sleeve 222 and the stationary iron core 140, and the cooperation between the positioning protrusion 211 and the return spring 300, can provide dual radial limitation for the valve core 200, thereby ensuring the coaxiality of the sealing structure 221 and the annular protrusion 1111 on the valve core 200, preventing misalignment when the sealing structure 221 and the annular protrusion 1111 come into contact, which would lead to sealing failure and consequently cause the solenoid valve 010 to fail to close.

[0114] The following reference Figure 5 and Figure 6 The working principle of the solenoid valve 010 of the present invention will be briefly explained below.

[0115] like Figure 5As shown, when the solenoid valve 010 is de-energized, the return spring 300 provides a force to the valve core 200, causing the sealing structure 221 to abut against the annular protrusion 1111. That is, under the action of the return spring 300, the valve core 200 abuts against the annular protrusion 1111 inside the housing 110. At this time, the valve core 200 is in the initial position, and the solenoid valve 010 is closed.

[0116] When solenoid valve 010 is energized, a magnetic circuit is generated between yoke 120, coil assembly 130, stationary iron core 140, and valve core 200, providing valve core 200 with a magnetic attraction force that overcomes the elastic force of return spring 300, thereby driving valve core 200 from... Figure 5 Move to the position shown Figure 6 The location shown.

[0117] like Figure 6 As shown, when the second inlet / outlet 1102 is the inlet, the airflow (such as...) Figure 6 (As shown by the dashed line) It flows sequentially through the second inlet / outlet 1102, the rectifier section 1012, the heat dissipation section 1011 and the first inlet / outlet 1101.

[0118] When the airflow passes through the rectification section 1012, the airflow is dispersed into a uniform shape by the rectification component 150 to avoid local large airflow and local small airflow in the heat dissipation section 1011. This results in some areas of the coil assembly 130 having good heat dissipation and some areas having poor heat dissipation, thereby improving the heat dissipation effect of the coil assembly 130 in the solenoid valve 010.

[0119] When the airflow passes through the heat dissipation section 1011, it exchanges heat with the electromagnetic coil 132, thereby carrying away the heat generated by the electromagnetic coil 132 and preventing the electromagnetic coil 132 from operating at too high a temperature.

[0120] In actual use, those skilled in the art can, as needed, use the first inlet / outlet 1101 as an outlet and the second inlet / outlet 1102 as an inlet; or, use the first inlet / outlet 1101 as an inlet and the second inlet / outlet 1102 as an outlet.

[0121] like Figure 14 and Figure 15 As shown, the present invention also provides a carbon canister module 001, which includes a carbon canister 020 and a solenoid valve 010 mounted on the carbon canister 020. The solenoid valve 010 is the solenoid valve 010 described in any embodiment.

[0122] In automotive fuel evaporative emission control systems, the carbon canister 020 is a core component for fuel vapor adsorption and storage. It primarily collects gasoline vapor generated in the fuel tank due to temperature changes and vehicle vibrations, preventing direct emission of gasoline vapor into the atmosphere and thus avoiding environmental pollution and fuel waste. It is a crucial component of the overall vehicle evaporative emission control system. The carbon canister 020 has a sealed shell structure with a hollow cavity inside, filled with an adsorption medium (such as high-density activated carbon particles). This allows the carbon canister 020 to adsorb and store gasoline vapor using the abundant microporous structure of the activated carbon.

[0123] like Figure 14 and Figure 15 As shown, the carbon canister 020 includes a spout 410, which defines a fuel vapor inlet 401, a desorption outlet 402, and an atmospheric connection 403. In other words, the fuel vapor inlet 401, the desorption outlet 402, and the atmospheric connection 403 are all tubular structures.

[0124] The fuel vapor intake port 401 is used to connect to the fuel tank to receive gasoline vapor generated in the fuel tank. The fuel vapor intake port 401 can continuously receive fuel vapor volatilized from the fuel tank so that, under static conditions, the fuel vapor is adsorbed and retained by the activated carbon inside the carbon canister 020.

[0125] The atmospheric connection interface 403 is used to connect to the ambient atmosphere to balance the air pressure inside the carbon canister 020. When gasoline vapor flows from the carbon canister 020 to the engine, ambient air is introduced into the carbon canister 020 and ultimately into the engine. The atmospheric connection interface 403 has a built-in simple filter structure that filters dust and impurities from the outside air, preventing impurities from entering the carbon canister 020 and clogging the activated carbon micropores, contaminating the fuel and air passages, and ensuring the adsorption efficiency and service life of the carbon canister 020.

[0126] The desorption outlet port 402 is used to connect to the engine to conduct gasoline vapor from the fuel tank to the engine. As the core channel of the fuel vapor desorption cycle, the desorption outlet port 402 opens the air passage when the engine is started and the desorption conditions are met. With the help of the intake negative pressure, the adsorbed fuel vapor is carried into the engine cylinder to participate in combustion, realizing fuel recovery and reuse, and reducing the vehicle's fuel consumption and exhaust emissions.

[0127] In addition, those skilled in the art may omit the plugs 410 corresponding to the fuel vapor intake port 401 and the atmospheric connection port 403 as needed, and set the fuel vapor intake port 401 and the atmospheric connection port 403 as a hole structure.

[0128] Furthermore, the solenoid valve 010 is inserted into the socket 410 corresponding to the desorption outlet port 402 through the second inlet / outlet 1102, and is sealed to the socket 410 through the sealing ring 160, and is welded or bolted to the carbon canister 020 through the flange 1121.

[0129] like Figure 16 As shown, those skilled in the art can also configure a one-way valve 030 for the carbon canister module 001 as needed, and connect the one-way valve 030 to the first inlet and outlet 1101 of the solenoid valve 010.

[0130] Example 1: The one-way valve 030 is inserted into the first inlet / outlet 1101 in an interference fit to form a sealed connection.

[0131] Example 2: One of the check valve 030 and the first inlet / outlet 1101 is provided with an external thread, and the other is provided with an internal thread, so that the check valve 030 is threadedly connected to the first inlet / outlet 1101.

[0132] Example 3: The one-way valve 030 is first inserted into the first inlet / outlet 1101, and then welded to the outer casing 110.

[0133] It should be noted that in the preceding description of this invention, the term "axial" refers to the axial direction of the solenoid valve 010 (e.g., ...). Figure 5 and Figure 6 As shown), the term "radial" refers to the radial direction of solenoid valve 010 (as shown). Figure 5 and Figure 6 (As shown) The term "circumferential" refers to the circumferential direction of solenoid valve 010.

[0134] The technical solutions of the present invention have been described in conjunction with several embodiments above. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Without departing from the technical principles of the present invention, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to related technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of the present invention will fall within the scope of protection of the present invention.

[0135] Finally, it should be noted that in this invention, the term "connection" refers to fluid connectivity, allowing fluids (e.g., air, liquid) to flow between two interconnected entities. Furthermore, this "connection" can be either a leak-free flow of fluid between interconnected entities, or a flow with slight leakage between interconnected entities.

Claims

1. A solenoid valve, characterized in that, It includes a valve body having a first inlet and a second inlet and a valve core for controlling the opening and closing between the first inlet and the second inlet and the valve core. The valve body includes, from the outside to the inside, a shell, a magnetic yoke, a coil assembly, and a stationary iron core; The first inlet and the second inlet are respectively formed at both ends in the axial direction of the outer casing; The valve body defines an airflow passage that connects the first inlet and outlet with the second inlet and outlet. The airflow passage includes a heat dissipation section formed between the housing and the magnetic yoke and a rectification section located between the heat dissipation section and the second inlet and outlet. The valve body also includes a rectifier component arranged in the rectifier section, so that the airflow from the second inlet and outlet to the first inlet and outlet is rectified by the rectifier component in the rectifier section and flows evenly to the heat dissipation section to uniformly cool the coil assembly.

2. The solenoid valve according to claim 1, characterized in that, The rectifier component includes a rectifier mesh and a mounting frame for fixing the rectifier mesh; The outer radial side of the fixing frame is provided with a snap-fit ​​structure, which snaps or interferes with the peripheral wall of the rectifier section to fix the rectifier component in the rectifier section.

3. The solenoid valve according to claim 2, characterized in that, The axial end of the retaining bracket away from the snap-fit ​​structure abuts against the housing; the snap-fit ​​structure is a conical annular structure that extends radially outward in a direction away from the second inlet / outlet and is interference-fitted with the peripheral wall of the rectifying section; and / or, The mounting bracket is a structure made of elastic material.

4. The solenoid valve according to claim 1, characterized in that, The magnetic yoke defines a mounting cavity with an open end for arranging the coil assembly and the stationary iron core. The side wall of the mounting cavity is provided with a heat dissipation notch that connects to the heat dissipation section, so that the gas flowing in the heat dissipation section and the gas in the mounting cavity can form convection, thereby improving the heat dissipation efficiency of the coil assembly.

5. The solenoid valve according to claim 4, characterized in that, The heat dissipation notch extends axially through the magnetic yoke, such that the heat dissipation notch includes a region formed on the peripheral wall of the mounting cavity and a region formed on the bottom wall of the mounting cavity, thereby making the heat dissipation notch L-shaped.

6. The solenoid valve according to claim 1, characterized in that, The heat dissipation section includes an annular cavity located radially between the housing and the magnetic yoke; and / or The rectifier section is located axially between the magnetic yoke and the second inlet / outlet.

7. The solenoid valve according to claim 1, characterized in that, An annular protrusion extending inward along the axial direction is provided on the inner side of one end of the outer casing, and the annular protrusion is connected to the first inlet and outlet. The valve core includes a moving iron core for attracting the stationary iron core and / or the magnetic yoke, a sealing structure for abutting the annular protrusion, and a sealing sleeve that fits onto the stationary iron core.

8. The solenoid valve according to claim 7, characterized in that, The sealing sleeve extends from the moving iron core toward the side away from the annular protrusion; and The diameter of the end of the sealing sleeve near the moving iron core is larger than the diameter of the portion of the sealing sleeve that fits into the stationary iron core.

9. The solenoid valve according to claim 8, characterized in that, The sealing sleeve includes a first axial extension section and a radial extension section, wherein the radial extension section extends radially inward from the end of the first axial extension section away from the moving iron core; The stationary iron core is provided with an annular groove, and the inner end of the radial extension section is inserted into the annular groove to attach the sealing sleeve to the stationary iron core.

10. The solenoid valve according to claim 9, characterized in that, The sealing sleeve further includes a second axial extension, which extends from the inner end of the radial extension in a direction away from the first axial extension. The axial end face of the annular groove away from the first axial extension is a conical surface that is in sealing contact with the second axial extension.

11. The solenoid valve according to claim 10, characterized in that, The stationary iron core is provided with two annular protrusions to define the annular slot; The tapered surface is formed on one of the two annular shoulders that is furthest from the valve core, and it abuts against the end of the coil assembly near the valve core. The end of the stationary iron core away from the valve core passes through the end of the magnetic yoke away from the valve core and is riveted to the magnetic yoke.

12. The solenoid valve according to claim 7, characterized in that, When the coil assembly is energized, the moving iron core can be simultaneously attracted by the magnetic yoke and the stationary iron core to enhance the electromagnetic driving force of the moving iron core.

13. The solenoid valve according to claim 7, characterized in that, The sealing structure and the sealing sleeve are integrally molded onto the moving iron core using an injection molding process.

14. The solenoid valve according to claim 7, characterized in that, The sealing structure is configured as an annular structure; The moving iron core is provided with a pressure balance hole, one end of which extends to the inner radial side of the sealing structure, and the other end of which extends to the inner radial side of the sealing sleeve.

15. The solenoid valve according to claim 1, characterized in that, The outer shell includes a top shell defining the first inlet and outlet and a bottom shell defining the second inlet and outlet; The magnetic yoke is fixedly connected radially to at least one of the top shell and the bottom shell, and is clamped axially by the top shell and the bottom shell; The top shell and the bottom shell are fixedly connected.

16. The solenoid valve according to claim 15, characterized in that, The inner peripheral wall of the bottom shell is provided with a plurality of vertical ribs that are spaced apart along its circumference. The magnetic yoke abuts against the portion of the vertical rib away from the top shell, so that the top space between the magnetic yoke and the bottom shell is annular.

17. The solenoid valve according to claim 15, characterized in that, The magnetic yoke has a fixing ring extending radially outward at one end near the top shell, and the fixing ring is clamped axially by the top shell and the bottom shell.

18. A carbon canister module, characterized in that, It includes a carbon canister and a solenoid valve mounted on the carbon canister, the solenoid valve being the solenoid valve according to any one of claims 1 to 17.

19. The carbon canister module according to claim 18, characterized in that, The carbon canister module also includes a one-way valve installed on the end of the solenoid valve having the first inlet and outlet, the one-way valve being connected to the first inlet and outlet.

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