solenoid valve

Abstract

An electromagnetic valve comprising a valve body, a valve core and at least one solenoid assembly, wherein each solenoid assembly comprises a winding and an outer magnetic conductive housing arranged outside the winding, the winding defining an axial direction, a radial direction and a circumferential direction, a section of the outer magnetic conductive housing located radially outside the winding defining a first magnetic conductive section, and wherein the electromagnetic valve complies with the standard of oil port size code 03 according to ISO 4401:2005, the conductive wire of the winding has a diameter of 0.380 mm to 0.400 mm with an insulation layer, the first magnetic conductive section has a thickness of 2.20 mm to 3.00 mm in the radial direction. The electromagnetic valve according to the present application has the same or even improved working performance relative to the existing electromagnetic valve of the same size, while reducing the amount of conductive material used for the conductive wire of the winding. The present application also discloses a corresponding electromagnetic valve complying with the standard of oil port size code 05 according to ISO 4401:2005.

Description

Technical Field

[0001] This invention relates to the field of valves, and more specifically to a solenoid valve. Background Technology

[0002] Solenoid valves are used to control the flow of fluids in fluid systems or equipment. For example, directional control valves can control the direction of fluid flow in the relevant equipment. A directional control valve can be a solenoid valve, which controls the direction of fluid flow within the valve body via at least one solenoid assembly.

[0003] In some applications of solenoid valves, such as in hydraulic systems, there are standards or specifications for their installation. Accordingly, similar to electrical parameters, the external dimensions and mating dimensions of commercially available solenoid valves are generally designed according to specific specifications. Therefore, for a given specification of solenoid valve, its internal basic structure and parameters have been less frequently improved over time.

[0004] However, for some current solenoid valves, there is still a desire for them to have an optimized structure, thereby reducing raw material and energy consumption during product manufacturing, while having the same or even improved performance. Summary of the Invention

[0005] To address the above problems, according to a first aspect of the present invention, a solenoid valve is provided, comprising a valve body, a valve core, and at least one solenoid assembly, wherein each solenoid assembly includes a winding and an outer magnetic housing disposed outside the winding, the winding defining an axial direction, a radial direction, and a circumferential direction, a portion of the outer magnetic housing located radially outside the winding defining a first magnetic section, and wherein the solenoid valve conforms to the port specification designation 03 according to ISO 4401:2005, the conductor of the winding having a diameter of 0.380 mm to 0.400 mm including an insulation layer, and the first magnetic section having a thickness of 2.20 mm to 3.00 mm in the radial direction.

[0006] In the solenoid valve according to the first aspect of the invention, the structure related to the generation and distribution of magnetic flux lines in the solenoid assembly is improved, thus the solenoid valve has the same or even improved operating performance as existing solenoid valves, while reducing the amount of conductive material used in the wires used to manufacture the windings. In other words, the solenoid valve according to the first aspect of the invention can reduce raw material consumption and energy consumption during manufacturing (e.g., helping to reduce carbon footprint, etc.) while ensuring or even improving operating performance. Furthermore, the solenoid valve according to the first aspect of the invention can be assembled and manufactured by combining a winding and a first magnetic section having the above parameters with other components used in existing solenoid valves of the same specifications, further reducing production costs.

[0007] Specifically, for solenoid valves conforming to ISO 4401:2005 with port specification code 03, the diameter of the winding conductor is generally greater than 0.410 mm, and if a corresponding outer magnetic housing exists, the radial thickness of the portion located radially outside the winding is generally less than 2.00 mm. However, the applicant has discovered that by reducing the diameter of the winding conductor to a certain extent, while increasing the radial thickness of the first magnetically conductive section of the outer magnetic housing located radially outside the winding to a certain extent, the solenoid valve can still operate normally within its original operating voltage and power range (e.g., operating voltage of 12 + / - 10% VDC or 24 + / - 10% VDC, power of 26 W to 32 W). Compared to existing solenoid valves, in the solenoid valve according to the first aspect of the invention, the valve core can be subjected to the same or even greater driving force from the solenoid assembly, thereby enabling the solenoid valve to have a greater upper limit for fluid flow rate and fluid pressure.

[0008] Generally, for solenoid valves of a specific specification, the diameter of the winding conductors in the solenoid assembly is not considered an adjustable parameter, especially when the goal is to reduce overall material costs while maintaining solenoid valve performance. In related fields, the common understanding is that if the solenoid valve needs to operate at its original operating voltage and power, reducing the winding conductor diameter requires a reduction in the total length of the winding conductors, leading to a decrease in the number of turns and a reduction in the driving force on the valve core. However, the applicant discovered during their research that by increasing the radial thickness of the aforementioned first magnetically conductive section of the outer magnetic housing to a certain extent, it is possible to ensure that the driving force of the solenoid assembly on the valve core remains constant, or even increases.

[0009] Furthermore, generally speaking, for a specific specification of solenoid valve, its outer magnetic housing serves as both a magnetically conductive component and a component supporting the solenoid assembly structure, and its radial thickness is not considered a parameter that needs adjustment. However, during the research process, the applicant discovered that for a specific specification of solenoid valve, by increasing the radial thickness of the aforementioned first magnetically conductive section of the outer magnetic housing to a certain extent within its specified external dimensions, the magnetic flux traveling through the first magnetically conductive section can be significantly increased, thereby increasing the driving force of the solenoid assembly on the armature located therein. Thus, even if the magnetic flux generated by the winding (which is related to the product of the number of turns N and the current I flowing through the winding) decreases to a certain extent, the driving force of the solenoid assembly on the valve core can remain unchanged or even increase.

[0010] Through analysis and verification, the applicant found that the solenoid valve according to the first aspect of the present invention can operate normally within the original operating voltage and power range and has the same or improved performance, while the amount of conductive material (e.g., copper) used to manufacture the winding wire can be reduced by 10% to 20%.

[0011] The solenoid valve according to the first aspect of the invention may have one or more of the following features, either individually or in combination.

[0012] According to one embodiment, preferably, the conductor of the winding has a diameter of 0.340 mm to 0.380 mm excluding the insulation layer.

[0013] According to one embodiment, preferably, the first magnetically conductive section has a thickness of 2.20 mm to 2.60 mm in the radial direction. The solenoid valve according to this embodiment has the aforementioned advantages while having a relatively material-saving outer magnetically conductive housing.

[0014] According to one embodiment, preferably, the first magnetically conductive section has an angle of 270° to 360° around the winding in the circumferential direction.

[0015] According to one embodiment, preferably, the winding has a resistance of 16 ohms to 23 ohms.

[0016] According to one embodiment, preferably, the outer magnetic housing further includes a second magnetic section and a third magnetic section located at the axial ends of the winding and connected to the first magnetic section, wherein the thickness of the second magnetic section and the third magnetic section in the axial direction is greater than the thickness of the first magnetic section in the radial direction.

[0017] According to a second aspect of the invention, a solenoid valve is provided, comprising a valve body, a valve core, and at least one solenoid assembly, wherein each solenoid assembly includes a winding and an outer magnetic housing disposed outside the winding, the winding defining an axial direction, a radial direction, and a circumferential direction, a portion of the outer magnetic housing located radially outside the winding defining a first magnetic section, and wherein the solenoid valve conforms to the port specification designation 05 according to ISO 4401:2005, the conductor of the winding having a diameter of 0.550 mm to 0.600 mm including an insulation layer, and the first magnetic section having a thickness of 2.80 mm to 3.50 mm in the radial direction.

[0018] Similar to the solenoid valve according to the first aspect of the invention, the solenoid valve according to the second aspect of the invention has the same or even improved operating performance as existing solenoid valves of the same specifications, while reducing the amount of conductive material (e.g., copper) used in the wires for manufacturing the windings, thus reducing raw material and energy consumption during product manufacturing. Similarly, the solenoid valve according to the second aspect of the invention is still capable of operating normally within its original operating voltage and power range (e.g., operating voltage of 12 + / - 10% VDC or 24 + / - 10% VDC, power of 36 W to 42 W).

[0019] The solenoid valve according to the second aspect of the invention may have one or more of the following features, either individually or in combination.

[0020] According to one embodiment, preferably, the conductor of the winding has a diameter of 0.500 mm to 0.570 mm excluding the insulation layer.

[0021] According to one embodiment, preferably, the first magnetically conductive section has a thickness of 2.80 mm to 3.20 mm in the radial direction. The solenoid valve according to this embodiment has the aforementioned advantages while having a relatively material-saving outer magnetically conductive housing.

[0022] According to one embodiment, preferably, the first magnetically conductive section has an angle of 270° to 360° around the winding in the circumferential direction.

[0023] According to one embodiment, preferably, the winding has a resistance of 12 ohms to 18 ohms.

[0024] According to one embodiment, preferably, the outer magnetic housing further includes a second magnetic section and a third magnetic section located at the axial ends of the winding and connected to the first magnetic section, wherein the thickness of the second magnetic section and the third magnetic section in the axial direction is greater than the thickness of the first magnetic section in the radial direction. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. The drawings are merely illustrative of some embodiments of the present invention and are not intended to limit the scope of the present invention to all embodiments.

[0026] Figure 1 This is a schematic perspective view of the solenoid valve according to the present invention.

[0027] Figure 2 This is a schematic partial cross-sectional view of the solenoid valve according to the present invention.

[0028] Figure 3A and Figure 3B This is a schematic cross-sectional view of a solenoid assembly of a solenoid valve according to the present invention, showing views with the armature in different positions.

[0029] Figure 4 This is a schematic cross-sectional view of some components of a solenoid assembly, with the cross-sectional plane orthogonal to the axis of the windings of the solenoid assembly.

[0030] List of reference numerals

[0031] 10. Solenoid valve

[0032] 100 First Solenoid Assembly

[0033] 110 winding

[0034] 120 External magnetic housing

[0035] 121 First magnetic conductive section

[0036] 122 Second magnetic section

[0037] 123 Third magnetic section

[0038] 130 spool

[0039] 135 Filler section

[0040] 140 Armature

[0041] 141. The outer periphery of the armature

[0042] 142 The center part of the armature

[0043] 143. Inner end face of the armature

[0044] 145 putter

[0045] 146 The end of the push rod

[0046] 150 Inner magnetic housing

[0047] 153 End face of the inner magnetic housing

[0048] 160 Magnetic shielding section

[0049] 170 Wiring Assembly

[0050] 180 Housing of the first solenoid assembly

[0051] 181 Circumferential section of the outer shell

[0052] 182 End section of the outer casing

[0053] 200 Second Solenoid Assembly

[0054] 510 Valve Body

[0055] 520 valve core

[0056] L0 Solenoid valve's central axis

[0057] axis of L1 winding

[0058] Thickness of the first magnetically conductive section T1 in the radial direction

[0059] Thickness of the second magnetic section in the axial direction of T2

[0060] Thickness of the third magnetic section in the axial direction of T3 Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0062] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” indicate that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to direct connections but can include indirect connections. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0063] The present invention will be described in detail below by way of example embodiments.

[0064] Figure 1 This is a schematic perspective view of the solenoid valve 10 according to the present invention. Figure 2 This is a schematic partial cross-sectional view of the solenoid valve 10 according to the present invention. Figure 1 and Figure 2 As shown, the solenoid valve 10 includes a valve body 510, a valve core 520, a first solenoid assembly 100, and a second solenoid assembly 200. Figure 2The diagram shows a cross-section of the valve body 510, a complete valve core 520, and a first solenoid assembly 100 and a second solenoid assembly 200. The valve body 510 has a passage for fluid flow and a cavity allowing movement of the valve core 520. The first solenoid assembly 100 and the second solenoid assembly 200 are respectively attached to both ends of the valve body 510, thereby enabling the valve core 520 to move in opposite directions along the central axis L0 of the solenoid valve 10. For example, as will be detailed later, the axis L1 of the winding of the first solenoid assembly 100 is parallel to or even coincides with the central axis L0 of the solenoid valve 10, and the axis of the winding of the second solenoid assembly 200 is also parallel to or even coincides with the central axis L0 of the solenoid valve 10, such that the armatures of the first solenoid assembly 100 and the second solenoid assembly 200 can drive the movement of the valve core 520.

[0065] The movement of the valve core 520 within the cavity of the valve body 510 allows the various channels within the valve body 510 to communicate or isolate each other, thereby altering the flow of fluid within the valve body 510. For example, the solenoid valve 10 is a directional control valve. For example, the solenoid valve 10 is a hydraulic valve. Figure 2 The solenoid valve 10 shown is an exemplary three-position four-way valve. However, the present invention does not limit the specific internal structure of the valve body 510 of the solenoid valve 10. Furthermore, according to embodiments of the present invention, the solenoid valve 10 may include a number of solenoid assemblies other than two, for example, only one solenoid assembly configured to drive the valve core 520 to move within the cavity of the valve body 510. The solenoid valves according to various embodiments of the present invention possess the advantages of the solenoid valve 10, which will be described in detail below.

[0066] The solenoid valve 10 according to the present invention can conform to the standard with port specification designation 03 (ISO 4401-03-02-0-05) or the standard with port specification designation 05 (ISO 4401-05-04-0-05) according to ISO 4401:2005. The specific construction of the solenoid valve 10 shown in the accompanying drawings is schematic, and the dimensions of the components and their relative relationships are also illustrative only. Hereinafter, details of embodiments of the present invention will be described primarily with reference to the solenoid valve 10 conforming to the standard with port specification designation 03.

[0067] Figure 3A and Figure 3B A schematic cross-sectional view of the first solenoid assembly 100 of the solenoid valve 10 according to an embodiment of the present invention is shown. Figure 3A and Figure 3BAs shown, the first solenoid assembly 100 includes a winding 110 formed by winding its conductors around a spool 130, for example, made of plastic. Thus, the winding 110 is generally tubular. The conductors of the winding 110 include a conductive central portion formed of a conductive material (e.g., copper) and an insulating layer surrounding the conductive central portion, the insulating layer being formed, for example, separately or by plating onto the surface of the conductive central portion. The ends of the conductors of the winding 110 are connected to a wiring assembly 170, which is electrically connected to a power source, allowing the conductors of the winding 110 to be energized and generating a magnetic field at the winding 110.

[0068] Figure 3A and Figure 3B An outer magnetic housing 120 is also shown. The outer magnetic housing 120 includes a first magnetically conductive section 121, a second magnetically conductive section 122, and a third magnetically conductive section 123. The first magnetically conductive section 121 is located radially outward of the winding 110, and is, for example, generally tubular, for guiding the magnetic flux lines generated by the winding 110. Here, the radial direction, as well as the corresponding axial and circumferential directions, can be defined relative to the winding 110, i.e., relative to the axis L1 of the winding 110. See also Figure 3A and Figure 3B The first magnetically conductive section 121 may not be closed in the circumferential direction, but rather a larger portion that extends 360° in the circumferential direction. Figure 4 A cross-sectional view of some components of the first solenoid assembly 100 is shown, the cross-sectional plane being orthogonal to the axis L1 of the winding 110 and passing through the first magnetically conductive section 121. Specifically, in Figure 4 The diagram shows a spool 130, a first magnetically conductive section 121, and a circumferential section 181 of a housing 180. The first magnetically conductive section 121 is not closed in the circumferential direction. For example, the angle of the first magnetically conductive section 121 around the winding 110 in the circumferential direction is between 270° and 360°. Accordingly, a connection portion between the wire of the winding 110 and the wiring assembly 170 is provided at the position where the first magnetically conductive section 121 is not closed in the circumferential direction, while ensuring that the first magnetically conductive section 121 guides a sufficient number of magnetic flux lines within its material.

[0069] The second magnetically conductive section 122 and the third magnetically conductive section 123 are located at the axial ends of the winding 110 and connected to the first magnetically conductive section 121, respectively. According to an embodiment of the invention, each of the second magnetically conductive section 122 and the third magnetically conductive section 123 has an annular disk shape, with its outer periphery connected to the first magnetically conductive section 121, and its center penetrating to accommodate the inner magnetically conductive housing 150 of the first solenoid assembly 100. Thus, the first magnetically conductive section 121, the second magnetically conductive section 122, and the third magnetically conductive section 123 guide magnetic flux lines radially outward and axially at both ends of the winding 110. For example, the first magnetically conductive section 121, the second magnetically conductive section 122, and the third magnetically conductive section 123 can be integrated onto the spindle 130 as in current manufacturing processes (see also...). Figure 4 This avoids magnetic leakage at the connection points between these components.

[0070] like Figure 3A and Figure 3B As shown, the outer shell 180 of the first solenoid assembly can be disposed on the outer side of the outer magnetic housing 120. The circumferential section 181 of the housing 180 can be formed by molding, for example by polymer molding. In addition, the filling portion 135 formed between the outer periphery of the winding 110 and the radially inner side of the first magnetic section 121 of the outer magnetic housing 120 can also be formed of the same polymer, and a thin spacer (not shown), such as paper, can be disposed between the lateral outer surface of the winding 110 and the polymer. The end section 182 of the housing 180 together with the circumferential section 181 surrounds the internal components of the first solenoid assembly 100. The end section 182 of the housing 180 can also be used to fix a part of the inner magnetic housing 150 of the first solenoid assembly 100.

[0071] The inner magnetic housing 150 of the first solenoid assembly 100 is located approximately radially inside the bobbin 130 and has a hollow structure. The inner magnetic housing 150 is fixed relative to the bobbin 130 and is arranged to extend at least from the second magnetic section 122 to the third magnetic section 123 along the axial direction of the winding 110, for guiding magnetic flux lines radially inside the winding 110. The inner magnetic housing 150 may have an annular groove on or near its radially outer surface. This annular groove is located axially between the two ends of the winding 110, and a magnetic isolation section 160 is arranged within the annular groove. The magnetic isolation section 160 is configured to be made of a material through which magnetic flux lines do not pass. The magnetic isolation section 160 interrupts the magnetic flux path in the inner magnetic housing 150, forcing the armature 140 to move along axis L1 within the inner magnetic housing 150. For example, the magnetic isolation section 160 is formed by brazing.

[0072] Further reference Figure 3A and Figure 3BAn armature 140 is disposed within the hollow interior of the inner magnetic housing 150, and the armature 140 is movable axially within the hollow interior of the inner magnetic housing 150. The armature 140 may include an outer peripheral portion 141 and a central portion 142 fixedly connected to each other, wherein at least the outer peripheral portion 141 is made of a magnetic material (e.g., soft iron) through which magnetic flux lines can pass. The outer peripheral portion 141 of the armature 140 is arranged close to the inner wall of the inner magnetic housing 150. Thus, by energizing the winding 110, the armature 140 can be driven to move within the hollow interior of the inner magnetic housing 150. A push rod 145 is fixed to one end of the armature 140, one end of which is mounted, for example, at the end of the central portion 142 of the armature 140, and the other end 146 of the push rod 145 is connected to the valve core 520 of the solenoid valve 10. Thus, the axial movement of the armature 140 can push the valve core 520 to move, thereby changing the flow of fluid within the solenoid valve 10. Figure 3A In the middle, the armature 140 is located closer to the right, and there is a non-zero distance between the inner end face 143 of the armature 140 and the end face 153 of the inner magnetic housing 150 facing the armature 140. Figure 3B In the middle, the armature 140 is located closer to the left, and the inner end face 143 of the armature 140 is close to the end face 153 of the inner magnetic housing 150.

[0073] Specifically, when the winding 110 is energized, magnetic flux lines are generated in the spaces inside and outside the tubular shape of the winding 110. The first magnetically conductive section 121, the second magnetically conductive section 122, and the third magnetically conductive section 123 of the outer magnetically conductive housing 120, as well as corresponding portions of the inner magnetically conductive housing 150 and the armature 140, can be traversed by these magnetic flux lines. Thus, the winding 110 drives the armature 140 to move within the hollow interior of the inner magnetically conductive housing 150. Therefore, the driving force that the armature 140 can experience affects the maximum permissible fluid pressure and maximum fluid flow rate of the solenoid valve 10 under normal operating conditions.

[0074] According to the present invention, by optimizing the size or parameters of the corresponding components in the first solenoid assembly 100, it is possible to maintain or increase the driving force on the armature 140 while reducing the conductive material forming the winding 110, thereby ensuring or increasing the maximum fluid pressure and maximum fluid flow allowed by the solenoid valve.

[0075] For a solenoid valve 10 conforming to the standard with port designation 03 according to ISO 4401:2005, the conductor of the winding 110, including the insulation layer, may have a diameter of 0.380 mm to 0.400 mm, while the first magnetically conductive section 121 may have a thickness of 2.20 mm to 3.00 mm in the radial direction. For example, the conductor of the winding 110, excluding the insulation layer, may have a diameter of 0.340 mm to 0.380 mm, and the entire winding 110 may have a resistance of 16 ohms to 23 ohms. Thus, the amount of conductive material (e.g., copper) used in the conductor of the winding 110 may be reduced by 15% to 20%. According to an embodiment of the invention, the first magnetically conductive section 121 may further have a thickness of 2.20 mm to 2.60 mm in the radial direction to reduce the installation space requirements of the solenoid valve 10 and reduce the material requirements of the outer magnetically conductive housing 120, while ensuring the operating performance of the solenoid valve 10. Furthermore, according to an embodiment of the present invention, the thickness T2 of the second magnetically conductive section 122 in the axial direction and the thickness T3 of the third magnetically conductive section 123 in the axial direction of the outer magnetically conductive housing 120 are both greater than the thickness T1 of the first magnetically conductive section 121 in the radial direction, so as to maintain or increase the driving force received by the armature 140. Additionally, according to an embodiment of the present invention, the winding 110 has an inner diameter of 22.00 mm to 25.00 mm. In this case, for example, the inner diameter of the first magnetically conductive section 121 of the outer magnetically conductive housing 120 can be between 36.00 mm and 40.00 mm.

[0076] For a solenoid valve 10 conforming to the standard with port designation 05 according to ISO 4401:2005, the conductor of the winding 110, including the insulation layer, may have a diameter of 0.550 mm to 0.600 mm, while the first magnetically conductive section 121 may have a thickness of 2.80 mm to 3.50 mm in the radial direction. For example, the conductor of the winding 110, excluding the insulation layer, may have a diameter of 0.500 mm to 0.570 mm, and the entire winding 110 may have a resistance of 12 ohms to 18 ohms. Thus, the amount of conductive material (e.g., copper) used in the conductor of the winding 110 may be reduced by 15% to 20%. According to an embodiment of the invention, the first magnetically conductive section 121 may further have a thickness of 2.80 mm to 3.20 mm in the radial direction to reduce the installation space requirements of the solenoid valve 10 and reduce the material requirements of the outer magnetically conductive housing 120, while ensuring the operating performance of the solenoid valve 10. Furthermore, according to an embodiment of the present invention, the thickness T2 in the axial direction of the second magnetically conductive section 122 and the thickness T3 in the axial direction of the third magnetically conductive section 123 of the outer magnetically conductive housing 120 are both greater than the thickness T1 in the radial direction of the first magnetically conductive section 121, thereby providing more area for conducting magnetic flux lines, which at least maintains or even increases the driving force on the armature 140. Additionally, according to an embodiment of the present invention, the winding 110 has an inner diameter of 29.00 mm to 33.00 mm. In this case, for example, the inner diameter of the first magnetically conductive section 121 of the outer magnetically conductive housing 120 can be between 53.00 mm and 60.00 mm.

[0077] The exemplary embodiments of the solenoid valve proposed in this invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this invention, and various combinations can be made to the various technical features and structures proposed in this invention without exceeding the protection scope of this invention.

Claims

1. A solenoid valve, comprising a valve body (510), a valve core (520), and at least one solenoid assembly (100), wherein, Each solenoid assembly includes a winding (110) and an outer magnetic housing (120) disposed outside the winding, the winding (110) defining an axial direction, a radial direction and a circumferential direction, a section of the outer magnetic housing (120) located radially outside the winding (110) defining a first magnetic section (121), and wherein the solenoid valve (10) conforms to the port specification code 03 according to ISO 4401:2005, the conductor of the winding (110) has a diameter of 0.380 mm to 0.400 mm including the insulation layer, and the first magnetic section (121) has a thickness of 2.20 mm to 3.00 mm in the radial direction.

2. The solenoid valve according to claim 1, wherein, The conductors of the winding (110) have a diameter of 0.340 mm to 0.380 mm excluding the insulation layer.

3. The solenoid valve according to claim 1, wherein, The first magnetically conductive section (121) has a thickness of 2.20 mm to 2.60 mm in the radial direction.

4. The solenoid valve according to claim 1, wherein, The first magnetically conductive section (121) has an angle of 270° to 360° around the winding (110) in the circumferential direction.

5. The solenoid valve according to claim 1, wherein, The winding (110) has a resistance of 16 ohms to 23 ohms.

6. The solenoid valve according to any one of claims 1 to 5, wherein, The outer magnetic housing (120) further includes a second magnetic section (122) and a third magnetic section (123) located at the two axial ends of the winding (110) and connected to the first magnetic section (121), respectively. The thickness of the second magnetic section (122) and the third magnetic section (123) in the axial direction is greater than the thickness of the first magnetic section (121) in the radial direction.

7. A solenoid valve, comprising a valve body (510), a valve core (520), and at least one solenoid assembly (100), wherein, Each solenoid assembly includes a winding (110) and an outer magnetic housing (120) disposed outside the winding, the winding (110) defining an axial direction, a radial direction and a circumferential direction, a section of the outer magnetic housing (120) located radially outside the winding (110) defining a first magnetic section (121), and wherein the solenoid valve (10) conforms to the standard with port specification code 05 according to ISO 4401:2005, the conductor of the winding (110) has a diameter of 0.550 mm to 0.600 mm including the insulation layer, and the first magnetic section (121) has a thickness of 2.80 mm to 3.50 mm in the radial direction.

8. The solenoid valve according to claim 7, wherein, The conductors of the winding (110) have a diameter of 0.500 mm to 0.570 mm excluding the insulation layer.

9. The solenoid valve according to claim 7, wherein, The first magnetically conductive section (121) has a thickness of 2.80 mm to 3.20 mm in the radial direction.

10. The solenoid valve according to claim 7, wherein, The first magnetically conductive section (121) has an angle of 270° to 360° around the winding (110) in the circumferential direction.

11. The solenoid valve according to claim 7, wherein, The winding (110) has a resistance of 12 ohms to 18 ohms.

12. The solenoid valve according to any one of claims 7 to 11, wherein, The outer magnetic housing (120) further includes a second magnetic section (122) and a third magnetic section (123) located at the two axial ends of the winding (110) and connected to the first magnetic section (121), respectively. The thickness of the second magnetic section (122) and the third magnetic section (123) in the axial direction is greater than the thickness of the first magnetic section (121) in the radial direction.

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