Valve device

Abstract

To provide a valve device capable of reducing the leakage of fluid in a fully closed state by suppressing axial deviation between a valve stem and a valve hole.SOLUTION: In one aspect of this disclosure, a valve device 1 includes a first seat 121 including a valve hole 16, a first valve 131 for abutting on / separating from the first seat 121 to open / close the valve hole 16, a valve shaft 14 mounted with the first valve 131, a movable core 31 for moving the valve shaft 14 in an axial direction of the valve shaft 14, a fixed core 32 arranged opposed to the movable core 31 in the axial direction of the valve shaft 14, and a cylindrical bobbin 33 having the movable core 31 and the fixed core 32 inside, and a coil 34 outside, the first seat 121 and the bobbin 33 being integrally formed via a connection part 40.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a valve device that opens and closes a fluid flow path. [Background technology]

[0002] Patent Document 1 discloses a valve device in which a coil sealing portion is integrally connected to a valve seat forming portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-232460 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the valve device of Patent Document 1, a coil sealing portion separate from the bobbin is integrally connected to a valve seat forming portion, and the valve seat forming portion and the bobbin are formed separately. Therefore, an axial misalignment (i.e., a misalignment of the central axis) may occur between the valve seat provided in the valve seat forming portion and the bobbin, which may cause an axial misalignment between the valve hole provided in the valve seat and the valve shaft connected to the movable core provided inside the bobbin. This may cause a fluid leak between the valve seat and the valve body when the valve is in a fully closed state.

[0005] Therefore, the present disclosure has been made to solve the above-mentioned problems, and aims to provide a valve device that can suppress axial misalignment between the valve stem and the valve hole, thereby reducing fluid leakage when in a fully closed state. [Means for solving the problem]

[0006] One form of the present disclosure made to solve the above problems is a valve device having a valve seat with a valve hole, a valve disc that opens and closes the valve hole by abutting and moving away from the valve seat, a valve stem to which the valve disc is attached, a movable core that moves the valve stem in the axial direction of the valve stem, a fixed core that is positioned opposite the movable core in the axial direction of the valve stem, and a cylindrical bobbin on the inside of which the movable core and the fixed core are provided and on the outside of which a coil is provided, wherein the valve seat and the bobbin are formed integrally via a connecting portion.

[0007] According to this aspect, the valve seat and the bobbin are integrally formed via a connecting portion, which improves the centering accuracy between the valve hole in the valve seat and the valve stem moved by the movable core provided inside the bobbin, thereby suppressing axial misalignment between the valve hole and the valve stem and reducing fluid leakage in the fully closed state.

[0008] In the above aspect, it is preferable that the connecting portion is formed by a plurality of pillar portions.

[0009] According to this aspect, the shape of the connecting portion can be simplified, and therefore the effect of the connecting portion on the flow of the fluid flowing through the valve device can be reduced.

[0010] In the above aspect, it is preferable that the plurality of columnar portions are disposed at equal intervals from one another in the circumferential direction of the annular valve seat.

[0011] According to this aspect, the degree of freedom in the circumferential direction of the connecting portion and the valve seat of the bobbin is increased, which improves the mountability of the valve device.

[0012] In the above aspect, it is preferable that an opening is provided between adjacent columnar portions, and when the connecting portion is viewed from the bobbin side, the columnar portion has a planar portion parallel to the central axis of the opening.

[0013] According to this aspect, the distance between the adjacent columnar portions can be increased to increase the opening area of ​​the opening, thereby reducing the pressure loss of the fluid flowing through the opening, and therefore increasing the flow rate of the fluid in the valve device.

[0014] In the above aspect, it is preferable that the valve has a body that accommodates the valve seat and the connecting portion, and when the connecting portion is viewed from the bobbin side, a gap is formed between the columnar portion and the body through which fluid can flow.

[0015] According to this aspect, by making the fluid flow through the gap between the columnar portion and the body, the fluid can flow downstream without stagnation, thereby reducing pressure loss of the fluid.

[0016] In the above aspect, it is preferable that an opening is provided between adjacent columnar portions, and at least one of the multiple openings is provided with a spacer member that guides the direction in which the fluid flows.

[0017] According to this aspect, the fluid flow direction at the opening is guided by the spacer member, which makes it possible to prevent the fluid from entering the flow channel in a direction other than the flow direction, and therefore the fluid flows smoothly, thereby reducing pressure loss of the fluid.

[0018] In the above aspect, it is preferable that the fluid is a liquid, and the spacer member swells when it comes into contact with the liquid flowing through the opening.

[0019] According to this aspect, the spacer member swells and presses against the adjacent columnar portions, so that the spacer member can be fixed more firmly to the columnar portions. In addition, the spacer member swells also on the side surface of the body, so that the spacer member can be tightly attached to the side surface of the body.

[0020] In the above aspect, it is preferable that the valve body has a body that accommodates the valve body, the body has an inlet flow passage connected to a portion that accommodates the valve body, the valve body has a first valve body and a second valve body that are arranged at a distance in the axial direction of the valve stem, and the area of ​​the flow passage formed between the body and the valve body when the valve body is viewed from the axial direction of the valve stem is larger than the area of ​​the flow passage formed between the first valve body and the second valve body when the valve body is viewed from the inlet flow passage.

[0021] According to this aspect, the fluid that has flowed from the inlet flow passage into the flow passage formed between the first valve body portion and the second valve body portion of the valve body can smoothly flow out of the flow passage formed between the body and the valve body, thereby reducing pressure loss of the fluid.

[0022] In the above aspect, it is preferable that the valve device is a device that is mounted in a flow path of cooling water for an electric vehicle.

[0023] According to this aspect, the valve device can suppress axial misalignment between the valve stem and the valve hole, and reduce leakage of fluid when in a fully closed state, so that the flow rate of the cooling water can be controlled with high precision. As a result, the cooling water can flow at a flow rate required by the electric vehicle. This improves the energy efficiency of the electric vehicle and contributes to carbon neutrality. Effect of the Invention

[0024] According to the valve device of the present disclosure, axial misalignment between the valve stem and the valve hole can be suppressed, thereby reducing fluid leakage in the fully closed state. [Brief description of the drawings]

[0025] [Figure 1] FIG. 2 is a diagram illustrating the valve device of the first embodiment (a first valve open state, and a second seat and a second valve fully closed state). [Diagram 2] FIG. 2 is a diagram illustrating the valve gear of the first embodiment (second valve open state, first seat and first valve fully closed state). [Diagram 3] FIG. 13 is a diagram showing that the first sheet and the bobbin are integrally formed via a connecting portion. [Figure 4] 4 is a cross-sectional view taken along line AA in FIG. [Diagram 5] FIG. 2 is a diagram showing an example of a molding die used in the first embodiment. [Figure 6] FIG. 5 is a diagram corresponding to FIG. 4 in the second embodiment. [Figure 7] FIG. 11 is a diagram showing an example of a molding die used in the second embodiment. [Figure 8] FIG. 5 is a diagram corresponding to FIG. 4 in a first modified example of the second embodiment. [Figure 9] FIG. 5 is a diagram corresponding to FIG. 4 in a second modified example of the second embodiment. [Figure 10] FIG. 11 is an enlarged view of a spacer member and its periphery in the third embodiment. [Figure 11] FIG. 5 is a diagram corresponding to FIG. 4 in the third embodiment. [Figure 12] FIG. 11 is a view of the first outlet flow path side as viewed from the internal flow path in the third embodiment. [Figure 13] FIG. 13 is an enlarged view of a spacer member and its periphery in the fourth embodiment. [Figure 14] 14 is a cross-sectional view of FIG. 13 taken along line B-B. [Figure 15] 13 is a diagram showing a valve gear according to a fifth embodiment (first valve open state, second seat and second valve fully closed state). FIG. [Figure 16] 16 is a cross-sectional view taken along CC in FIG. 15. [Figure 17] FIG. 16 is a cross-sectional view taken along line CC in FIG. 15, showing various dimensions. [Figure 18] FIG. 13 is a diagram showing an example of a molding die used in the fifth embodiment. [Figure 19] FIG. 13 is a diagram showing a modified example of the fifth embodiment. [Figure 20] FIG. 13 is a diagram of a valve as viewed from the axial direction of a valve shaft in a sixth embodiment (corresponding to the cross-sectional view taken along line DD in FIG. 1). [Figure 21] FIG. 13 is a diagram of the valve as viewed from the inflow channel in the sixth embodiment.

[0026] A valve device 1 according to an embodiment of the present disclosure will be described.

[0027] First Embodiment First, the first embodiment will be described.

[0028] (Outline of valve mechanism) An overview of the valve device 1 of this embodiment will be described. The valve device 1 is a device that is mounted in a coolant flow path of, for example, an electric vehicle (not shown) and controls the flow rate of the coolant. Note that "coolant" is an example of the "fluid" or "liquid" in the present disclosure. Also, an "electric vehicle" is, for example, a vehicle that is driven by power from a secondary battery as the drive source of the vehicle, such as an electric vehicle or a hybrid vehicle.

[0029] 1 and 2, the valve device 1 has a body 11 (i.e., a housing) having a flow passage, a seat 12, a valve 13, a valve shaft 14, and an actuator 15. Note that the seat 12 is an example of a "valve seat" in the present disclosure, the valve 13 is an example of a "valve body" in the present disclosure, and the valve shaft 14 is an example of a "valve stem" in the present disclosure.

[0030] The body 11 includes an internal flow passage 20 that is a portion that houses the valve 13, one inlet flow passage 21, and two outlet flow passages 22. In this manner, the valve device 1 is a three-way valve.

[0031] The inflow passage 21 is a passage that is connected to the internal passage 20 and that allows the cooling water to flow into the internal passage 20 .

[0032] The outflow passage 22 is a passage for discharging the cooling water from the internal passage 20. A first outflow passage 221 and a second outflow passage 222 are provided as the two outflow passages 22. The first outflow passage 221 is provided on the actuator 15 side with respect to the internal passage 20. The second outflow passage 222 is provided on the opposite side of the internal passage 20 to the actuator 15.

[0033] In this embodiment, a first sheet 121 and a second sheet 122 are provided as the sheet 12. The first sheet 121 is disposed on the first outflow passage 221 side of the internal passage 20. The second sheet 122 is disposed on the second outflow passage 222 side of the internal passage 20. The first sheet 121 and the second sheet 122 are both formed in an annular shape and each have a valve hole 16 and a valve hole 17 in the center.

[0034] The body 11 is made of resin. The seat 12 is made of resin, but may be made of rubber.

[0035] The valve 13 is attached to the valve shaft 14, and opens and closes the valve holes 16 and 17 by coming into contact with and moving away from the seat 12. In this embodiment, the valve 13 includes a first valve 131 and a second valve 132 arranged at a distance in the axial direction of the valve shaft 14. A rubber seal 131a of the first valve 131 comes into contact with and moves away from the first seat 121 on the internal flow path 20 side. A rubber seal 132a of the second valve 132 comes into contact with and moves away from the second seat 122 on the internal flow path 20 side.

[0036] Although the valve 13 is made of resin, it may be made of metal. The first valve 131 is an example of a "first valve body" in the present disclosure, and the second valve 132 is an example of a "second valve body" in the present disclosure.

[0037] The valve shaft 14 is disposed inside the body 11. The valve shaft 14 is provided between the actuator 15 and the second valve 132. Note that the valve shaft 14 is made of metal, but may be made of resin.

[0038] In this embodiment, the valve 13 is attached to one end of the valve shaft 14 in the axial direction of the valve shaft 14. The valve shaft 14 is movable in a thrust direction, which is the axial direction of the valve shaft 14 (i.e., the central axial direction).

[0039] The actuator 15 is a drive unit that moves the valve shaft 14 in the axial direction of the valve shaft 14. In this embodiment, the actuator 15 includes a movable core 31, a fixed core 32, a bobbin 33, a coil 34, a casing 35, and the like.

[0040] The movable core 31 moves integrally with the valve shaft 14, thereby moving the valve shaft 14 in the axial direction (central axis direction) of the valve shaft 14. The fixed core 32 is disposed opposite the movable core 31 in the axial direction of the valve shaft 14.

[0041] The movable core 31 and the fixed core 32 are made of a magnetic material (for example, a metal). When a current flows through the coil 34 and a magnetic field is generated around the coil 34, the movable core 31 and the fixed core 32 are magnetized by the magnetic field. When the movable core 31 and the fixed core 32 are magnetized, the movable core 31 is attracted to the fixed core 32 by a magnetic force, and the movable core 31 approaches the fixed core 32. When no current flows through the coil 34, the movable core 31 and the fixed core 32 are not magnetized, the movable core 31 is not attracted to the fixed core 32, and the movable core 31 does not approach the fixed core 32.

[0042] The bobbin 33 is formed in a cylindrical shape, and has the movable core 31 and the fixed core 32 provided inside and the coil 34 provided outside. The bobbin 33, the coil 34, etc. are molded and covered with resin to form a resin casing 35.

[0043] The valve device 1 configured as described above can be switched between a first open state shown in FIG. 1 and a second open state shown in FIG. 2 by moving the valve shaft 14 in the axial direction of the valve shaft 14 using the actuator 15.

[0044] The "first open valve state" refers to a state in which the first seat 121 and the first valve 131 are fully open, and the second seat 122 and the second valve 132 are fully closed. The "second open valve state" refers to a state in which the first seat 121 and the first valve 131 are fully closed, and the second seat 122 and the second valve 132 are fully open. The "fully closed state" refers to a state in which the seat 12 and the valve 13 are in contact over the entire circumferential direction of the annular seat 12, and the gap between the seat 12 and the valve 13 is sealed.

[0045] 1, the cooling water introduced from the inflow passage 21 is discharged from the first outflow passage 221. In addition, in the second open state shown in FIG. 2, the cooling water introduced from the inflow passage 21 is discharged from the second outflow passage 222.

[0046] (Explanation regarding the integration of the first sheet and the bobbin) Next, the integration of the first sheet 121 and the bobbin 33 will be described. In this embodiment, as shown in Fig. 3, the first sheet 121 and the bobbin 33 are integrally formed via a connecting portion 40. The first sheet 121 and the connecting portion 40 are housed in the body 11.

[0047] In this way, the first seat 121 and the bobbin 33 are integrally formed via the connecting portion 40, so that the first seat 121 and the bobbin 33 are positioned. Therefore, the axial misalignment (i.e., misalignment of the central axis) between the valve hole 16 of the first seat 121 and the bobbin 33 can be suppressed, and the axial misalignment between the valve hole 16 and the valve shaft 14 disposed inside the bobbin 33 can be suppressed. Therefore, the centering accuracy (i.e., the accuracy with which the central axes coincide) between the first seat 121 and the first valve 131 is improved. Therefore, when the first seat 121 and the first valve 131 are in a fully closed state (i.e., the second open state in FIG. 2), the gap between the first seat 121 and the first valve 131 is sealed, and the leakage of the cooling water between the first seat 121 and the first valve 131 can be reduced.

[0048] The valve device 1 is a device mounted in the flow path of the cooling water of an electric vehicle, and when the first seat 121 and the first valve 131 are in a fully closed state, leakage of the cooling water between the first seat 121 and the first valve 131 can be reduced, so the flow rate of the cooling water can be controlled with high precision. This makes it possible to flow the cooling water at a flow rate required by the electric vehicle. This improves the energy efficiency of the electric vehicle and contributes to carbon neutrality.

[0049] Moreover, the first seat 121 and the bobbin 33 are formed as a single component. This makes it possible to reduce the number of components of the valve device 1 and also to reduce the number of steps required for assembling the valve device 1. This allows the manufacturing cost of the valve device 1 to be reduced.

[0050] Furthermore, the function for holding the first sheet 121 can be simplified. That is, when the first sheet 121 and the bobbin 33 are formed separately, a function for fixing the first sheet 121 so that the position does not shift is required. Therefore, for example, in order to press the first sheet 121 into the body 11, it is necessary to increase the thickness of the body 11 to ensure strength. In contrast, in this embodiment, since the first sheet 121 and the bobbin 33 are integrally formed, the position of the first sheet 121 is unlikely to shift, and therefore a function for fixing the position of the first sheet 121 so that the position does not shift is not required. Therefore, for example, since it is not necessary to press the first sheet 121 into the body 11, the thickness of the body 11 can be reduced. Therefore, the function for holding the first sheet 121 can be simplified.

[0051] In this embodiment, as shown in Fig. 3 and Fig. 4, the connecting portion 40 is formed by four columnar portions 41. Note that, in the example shown in Fig. 3 and Fig. 4, the columnar portion 41 is formed in a substantially rectangular parallelepiped shape. Also, the number of the connecting portion 40 is not limited to four, and it is sufficient if the connecting portion 40 is formed by a plurality of columnar portions 41.

[0052] This makes it possible to simplify the shape of the connecting portion 40. Therefore, the effect of the connecting portion 40 on the flow of the cooling water flowing inside the valve device 1 can be reduced.

[0053] 4, in this embodiment, the four columnar portions 41 are disposed at equal intervals from one another in the circumferential direction of the annular first sheet 121. That is, the four columnar portions 41 are disposed at equal intervals of 90° in the circumferential direction of the first sheet 121. The columnar portions 41 are formed to have a substantially rectangular cross section, and are disposed such that the long side direction coincides with the radial direction of the first sheet 121. An opening 42 is provided between adjacent columnar portions 41.

[0054] This increases the degree of freedom in the circumferential direction orientation of the connecting portion 40 and the first seat 121 of the bobbin 33. This improves the mountability of the valve device 1.

[0055] 5, the molds for forming the first sheet 121 and the connecting portion 40 can be two molds having the same shape, that is, a first mold 101 and a second mold 102. This can reduce the cost of processing the first sheet 121 and the connecting portion 40.

[0056] <Second embodiment> Next, the second embodiment will be described. The differences from the first embodiment will be described, and a description of the points in common with the first embodiment will be omitted.

[0057] In this embodiment, as shown in Fig. 6, when the connecting part 40 is viewed from the bobbin 33 side, the columnar part 41 has a flat part 43 that is parallel to the central axis CL of the opening 42. In the example shown in Fig. 6, the connecting part 40 is formed by two columnar parts 41. In Fig. 6, the direction in which the cooling water flows from the valve hole 16 toward the first outflow passage 221 is shown as the "flow direction".

[0058] In this way, by providing the columnar portion 41 with the flat portion 43, the distance L2 between the two columnar portions 41 can be made larger than the distance L1 between the two adjacent columnar portions 41 in Fig. 4, and the opening area of ​​the opening 42 can be made larger than that in Fig. 4. This makes it possible to reduce the pressure loss of the cooling water flowing through the opening 42. Therefore, the flow rate of the cooling water that can be flowed through the valve device 1 can be increased.

[0059] 6 can be formed using two identically shaped first and second molds 101 and 102 as shown in Fig. 7. This allows the processing costs of the first sheet 121 and the connecting portion 40 to be reduced.

[0060] Furthermore, as a first modified example, as shown in FIG. 8, in the columnar portion 41, a flat portion 43 may be formed in the horizontal direction (i.e., the left-right direction in FIG. 8) and the vertical direction (i.e., the up-down direction in FIG. 8) starting from a point on a 45° line (the dashed line indicated as "45°" in FIG. 8).

[0061] As a second modified example, as shown in FIG. 9, in the columnar portion 41, a planar portion 43 may be formed starting from a point on a 30° line (a dashed line indicated as "30°" in FIG. 9) along the horizontal direction (the left-right direction in FIG. 9) and a direction inclined by 120° relative to the horizontal direction.

[0062] Even with these modified examples, the distance L2 between two adjacent columnar portions 41 can be made larger than the distance L1 between two adjacent columnar portions 41 in Fig. 4, and the opening area of ​​the opening 42 can be made larger than that in Fig. 4. This makes it possible to reduce the pressure loss of the cooling water flowing through the opening 42. This makes it possible to increase the flow rate of the cooling water that can flow through the valve device 1.

[0063] Furthermore, according to the first modified example, the degree of freedom in the circumferential direction orientation of the connecting portion 40 and the first sheet 121 of the bobbin 33 can be ensured, similarly to the first embodiment.

[0064] Moreover, according to the second modified example, the distance L2 can be made larger than in the first modified example, and the opening area of ​​the opening 42 can be made larger than that in Fig. 8. Therefore, the pressure loss of the cooling water flowing through the opening 42 can be further reduced.

[0065] <Third embodiment> Next, a third embodiment will be described. Differences from the first and second embodiments will be described, and descriptions of commonalities with the first and second embodiments will be omitted.

[0066] In this embodiment, as shown in Figures 10 to 12, a spacer member 50 for guiding the direction in which the cooling water flows is provided in one of the four openings 42, i.e., the opening 42 connected to the first outflow passage 221. This spacer member 50 is disposed on the first sheet 121, and the surface in contact with the cooling water is formed in a curved shape from the outlet of the valve hole 16 to the inlet of the first outflow passage 221. Note that in Figures 10 to 12, the spacer member 50 is hatched with dots to show the spacer member 50 more clearly.

[0067] In this manner, by providing the spacer member 50, the corner C1 on the valve hole 16 side of the first sheet 121 and the corner C2 at the inlet of the first outflow passage 221 can be connected by a curved portion (i.e., the portion hatched with dots in FIG. 10) formed on the spacer member 50. This makes it possible to prevent pressure loss that occurs when the cooling water flows through the corner C1 and the corner C2.

[0068] When the cooling water flows through the opening 42, the spacer member 50 guides the flow direction of the cooling water toward the first outflow passage 221. This makes it possible to prevent the cooling water from entering in any direction other than the first outflow passage 221. This allows the cooling water to flow smoothly, thereby reducing pressure loss of the cooling water.

[0069] Moreover, the spacer member 50 is fixed to the columnar portion 41 by the first claw 51 and the second claw 52. Note that the protruding amount of the second claw 52 is greater than the protruding amount of the first claw 51.

[0070] Furthermore, the spacer member 50 is adapted to swell when it comes into contact with cooling water.

[0071] Specifically, the material of the columnar portion 41 is, for example, PPS resin (i.e., polyphenylene sulfide), while the material of the spacer member 50 is a material that is more likely to swell when exposed to cooling water than the columnar portion 41, for example, PA6 resin (i.e., polyamide 6 resin) or POM resin (i.e., polyacetal resin).

[0072] In this way, by utilizing the difference in swelling between the columnar portion 41 and the spacer member 50, i.e., by making the spacer member 50 swell more easily than the columnar portion 41, the spacer member 50 expands when it comes into contact with the cooling water as it flows through the opening 42, and the spacer member 50 can be tightly attached to the columnar portion 41. Therefore, the spacer member 50 can be fixed to the columnar portion 41 more firmly.

[0073] In addition, since the spacer member 50 also swells on the inner wall 11a (i.e., side surface) side of the body 11, the spacer member 50 can be tightly attached to the inner wall 11a of the body 11. Furthermore, the second claws 52 swell and press against the columnar portion 41 and the inner wall 11a of the body 11, so that the spacer member 50 can be fixed to the columnar portion 41 and the body 11 more firmly.

[0074] The spacer member 50 may be provided in the openings 42 other than the opening 42 connected to the first outflow passage 221, for example, in all four openings 42. That is, it is sufficient that the spacer member 50 is provided in at least one of the four openings 42.

[0075] <Fourth embodiment> Next, the fourth embodiment will be described. The differences from the first to third embodiments will be described, and a description of the points in common with the first to third embodiments will be omitted.

[0076] 13 and 14, in this embodiment, in addition to the spacer member 50, a spacer member 60 is provided. This spacer member 60 is provided so as to be disposed on the first sheet 121 at the opening 42 opposite to the opening 42 in which the spacer member 50 is provided. The spacer member 60 has a curved surface portion so as to guide the cooling water to flow from the valve hole 16 toward the first outflow passage 221.

[0077] This allows the cooling water to flow smoothly as shown by the arrows in FIG. 13, eliminating stagnation in the flow of the cooling water.

[0078] Like the spacer member 50, the spacer member 60 also swells when it comes into contact with the cooling water flowing through the opening 42. Therefore, like the material of the spacer member 50, the spacer member 60 is made of a material that is more likely to swell when it comes into contact with the cooling water than the columnar portion 41, such as PA6 resin or POM resin.

[0079] Similarly to the spacer member 50, the spacer member 60 is fixed to the columnar portion 41 by a first claw 61 and a second claw 62 (see FIG. 14).

[0080] It should be noted that the spacer member 50 may be provided in at least one of the two openings 42 in which the spacer member 50 or the spacer member 60 is not provided.

[0081] <Fifth embodiment> Next, the fifth embodiment will be described. The differences from the first to fourth embodiments will be described, and a description of the points in common with the first to fourth embodiments will be omitted.

[0082] In this embodiment, as shown in FIG. 15, the outer diameter D of the first sheet 121 is enlarged, and the depth dimension of the columnar portion 41 is reduced. As shown in FIG. 16, when the connecting portion 40 is viewed from the bobbin 33 side, a gap δ through which cooling water can flow is formed between the columnar portion 41 and the inner wall 11a of the body 11.

[0083] As a result, by flowing the cooling water through the gap δ as shown by the arrow in Fig. 16, it is possible to prevent the flow of the cooling water from stagnating in the area α surrounded by the dashed line in Fig. 16. Therefore, the cooling water can be smoothly flowed from the valve hole 16 to the first outflow passage 221 on the downstream side, thereby reducing pressure loss of the cooling water.

[0084] In addition, since the outer diameter D of the first seat 121 is enlarged and the inner diameter of the body 11 is also enlarged, when assembling the actuator 15 having the valve 13 attached thereto to the body 11, it becomes easy to insert the valve 13 into the body 11 without hitting the inner wall 11a of the body 11.

[0085] Also, as shown in FIG. 17, when the flow area of ​​the region indicated by L1, which is the distance between two adjacent columnar portions 41, is SL1, the flow area of ​​the region indicated by L3, which is the distance between the columnar portion 41 and the inner wall 11a of the body 11, is SL3, and the flow area of ​​the region indicated by L4, which is the inner diameter of the first outflow passage 221, is SL4, the following formula is established. [Number 1] SL4<(SL1+SL3+SL3)

[0086] In this way, by making the size of the flow passage larger on the upstream side of the cooling water flow than on the downstream side, the cooling water can flow smoothly downstream more easily, thereby reducing pressure loss of the cooling water.

[0087] In this embodiment as well, as shown in FIG. 18, the first sheet 121 and the connecting portion 40 can be molded using a first molding die 101 and a second molding die 102, which are two molding dies having the same shape.

[0088] As a modified example, as shown in Fig. 19, a flow path δa through which cooling water can flow may be formed between the valve hole 16 and the columnar portion 41. Note that, in this modified example as well, as shown in Fig. 19, the first sheet 121 and the connecting portion 40 can be molded using a first molding die 101 and a second molding die 102, which are two molding dies having the same shape.

[0089] Sixth embodiment Next, the sixth embodiment will be described. The differences from the first to fifth embodiments will be described, and a description of the points in common with the first to fifth embodiments will be omitted.

[0090] In this embodiment, as shown in Figures 20 and 21, the area S2 of the flow path formed in the gap between the body 11 and the valve 13 when the valve 13 is viewed from the axial direction of the valve shaft 14 (the area of ​​the portion hatched with dots in Figure 20) is larger than the area S1 of the flow path formed between the first valve 131 and the second valve 132 when the valve 13 is viewed from the inlet flow path 21 (the area of ​​the portion hatched with dots in Figure 21).

[0091] As a result, the cooling water that has flowed from the inlet flow passage 21 into the flow passage formed between the first valve 131 and the second valve 132 can smoothly flow out to the first outlet flow passage 221 from the gap formed between the inner wall 11a of the body 11 and the valve 13. In this way, it is possible to reduce pressure loss of the cooling water at a position where the flow direction of the cooling water changes from the inlet flow passage 21 to a substantially right angle within the internal flow passage 20 and pressure loss of the cooling water is likely to occur.

[0092] It should be noted that the above-described embodiments are merely examples and do not limit the present disclosure in any way. Needless to say, various improvements and modifications are possible without departing from the spirit and scope of the present disclosure. [Explanation of symbols]

[0093] 1 Valve gear 11 Body 12 sheets 121 Sheet 1 122 2nd Sheet 13 Valve 131 First Valve 132 Second Valve 14 Valve shaft 15 Actuator 16 Valve hole 20 Internal flow path 21 Inlet Channel 22 Outlet Channel 221 First Outlet Channel 222 Second Outlet Channel 31 Movable Core 32 fixed core 33 Bobbin 34 Coil 40 Connection part 41 Columnar part 42 Opening 43 Plane part 50 Spacer member 60 Spacer member CL (Central axis of opening) L1 Distance (between adjacent pillars) L2 distance (between adjacent columns) δ Gap S1 Area of ​​the flow path S2 Area of ​​the flow channel

Claims

1. a valve seat having a valve hole; a valve body that opens and closes the valve hole by coming into contact with and moving away from the valve seat; a valve stem to which the valve body is attached; and a movable core that moves the valve shaft in an axial direction of the valve shaft; a fixed core disposed opposite the movable core in an axial direction of the valve shaft; a cylindrical bobbin on the inside of which the movable core and the fixed core are provided and on the outside of which a coil is provided; In the valve device, The valve seat and the bobbin are integrally formed via a connecting portion; A valve device comprising:

2. The valve device according to claim 1, The connecting portion is formed of a plurality of columnar portions; A valve device comprising:

3. The valve device according to claim 2, the plurality of columnar portions are disposed at equal intervals from one another in a circumferential direction of the annular valve seat; A valve device comprising:

4. The valve device according to claim 2 or 3, An opening is provided between adjacent columnar portions, When the connecting portion is viewed from the bobbin side, the columnar portion has a flat surface portion parallel to a central axis of the opening portion; A valve device comprising:

5. The valve device according to claim 2 or 3, a body that houses the valve seat and the connecting portion, When the connecting portion is viewed from the bobbin side, a gap through which a fluid can flow is formed between the columnar portion and the body. A valve device comprising:

6. The valve device according to claim 2 or 3, An opening is provided between adjacent columnar portions, At least one of the plurality of openings is provided with a spacer member for guiding the direction of fluid flow; A valve device comprising:

7. The valve device according to claim 6, the fluid is a liquid; the spacer member swells upon contact with the liquid flowing through the opening; A valve device comprising:

8. The valve device according to claim 1 or 2, a body that accommodates the valve body, The body includes an inlet passage connected to a portion that houses the valve body, The valve body includes a first valve body and a second valve body that are spaced apart from each other in an axial direction of the valve shaft, an area of ​​a flow path formed between the body and the valve body when the valve body is viewed from an axial direction of the valve stem is larger than an area of ​​a flow path formed between the first valve body and the second valve body when the valve body is viewed from the inlet flow path; A valve device comprising:

9. The valve device according to claim 1 or 2, the valve device is a device to be mounted in a flow path of cooling water for an electric vehicle; A valve device comprising:

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