Rotary valve

Abstract

A rotary valve according to one embodiment comprises: a valve body having a flow hole located on one side thereof and an accommodation space located therein; a rotor located in the accommodation space; a seal member located in the accommodation space so as to cover the inner surface of the valve body in a region in which the inner end of the flow hole is located; and a retainer located in a region on the opposite side to the seal member, with the rotor therebetween.

Description

Rotary valve

[0001] The present disclosure relates to a rotary valve.

[0002] Rotary valves are used to control the shape of fluid flow paths. For example, rotary valves can be used to control or change the shape of a coolant flow path. In a rotary valve, the shape of the flow path passing through the valve is controlled or changed based on the rotational state of a rotor located inside the valve body. Accordingly, the rotor must include a structure for controlling or changing the flow path, and the valve body needs to have a flow path formed that connects to the rotor. Due to these structural characteristics, there are limitations in implementing various flow path shapes using rotary valves.

[0003] The embodiments are intended to provide a rotary valve capable of effectively controlling and changing the fluid flow path according to the rotation of the rotor.

[0004] However, the problems that the embodiments of the present invention aim to solve are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention.

[0005] A rotary valve according to one aspect may include: a valve body having a flow hole located on one side and a receiving space located on the inside; a rotor located in the receiving space; a seal member located in the receiving space to cover the inner surface of the valve body in the area where the inner end of the flow hole is located; and a retainer located in the area opposite the seal member with the rotor in between.

[0006] In addition, at least a portion of the inner surface of the retainer may be positioned in contact with the rotor.

[0007] In addition, at least a portion of the inner surface of the retainer may have a structure that is concave toward the opposite direction of the rotor.

[0008] In addition, the retainer may have a rod structure having a preset length along a direction intersecting the longitudinal direction of the rotor.

[0009] In addition, at least one retainer may be positioned on the outer circumference of each of the longitudinal ends of the rotor.

[0010] Additionally, an opening is formed through one side of the valve body to allow the receiving space to be opened to the outside, and the retainer may be located in the area where the opening is located.

[0011] In addition, the above-mentioned flow holes are arranged along one direction while forming a plurality of flow hole arrangement lines, and a plurality of path control grooves having a groove structure that is concave toward the center region of the rotor may be located on the outer circumference of the rotor.

[0012] In addition, at least one of the plurality of path control grooves may have a shape corresponding to an area where at least two adjacent inner ends of the flow hole are located.

[0013] Additionally, the rotor comprises a shaft portion; and a cylindrical portion located on the outer circumference of the shaft portion, and a center flow path may be located on the inner side of the shaft portion.

[0014] In addition, a plurality of path control grooves having a groove structure that is concave toward the center region of the rotor are located on the outer circumference of the cylindrical portion, and at least one of the path control grooves can be connected to the center flow path.

[0015] According to the embodiments, a rotary valve can be provided that can effectively control and change the fluid flow path according to the rotation of the rotor.

[0016] FIG. 1 is a drawing of a rotary valve according to one embodiment, viewed from one side in the height direction.

[0017] FIG. 2 is a drawing of a rotary valve according to one embodiment, viewed from the other side in the height direction.

[0018] FIG. 3 is a drawing of a rotary valve according to one embodiment, viewed from one side in the width direction.

[0019] FIG. 4 is a drawing of a rotary valve according to one embodiment, viewed from one side in the longitudinal direction.

[0020] Figure 5 is a cross-sectional view according to AA of Figure 1.

[0021] Figure 6 is a view of the opening of the valve body with the cover removed.

[0022] Figure 7 is a drawing showing a rotor.

[0023] Figure 8 is a cross-sectional view along the longitudinal direction of the rotor.

[0024] Figures 9 to 11 are drawings illustrating the structure of the path control groove of the rotor.

[0025] Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments below. These embodiments are provided to more fully explain the present invention to those with average knowledge in the art. Accordingly, the shapes of the elements in the drawings have been exaggerated to emphasize clearer explanations.

[0026] FIG. 1 is a view of a rotary valve (1) according to one embodiment seen from one side in the height direction, FIG. 2 is a view of a rotary valve (1) according to one embodiment seen from the other side in the height direction, FIG. 3 is a view of a rotary valve (1) according to one embodiment seen from one side in the width direction, FIG. 4 is a view of a rotary valve (1) according to one embodiment seen from one side in the length direction, FIG. 5 is a cross-sectional view according to AA of FIG. 1, and FIG. 6 is a view of the opening (120) of the valve body (10) with the cover (20) removed.

[0027] Referring to FIGS. 1 to 6, a rotary valve (1) according to one embodiment may include a valve body (10), a cover (20), a rotor (30), a seal member (40), and a retainer (50).

[0028] Hereinafter, the direction in which the rotation axis of the rotor (30) faces may be called the first direction (X), the direction perpendicular to the first direction (X) may be called the second direction (Y), and the direction perpendicular to the first direction (X) and the second direction (Y) may be called the third direction (Z). The first direction (X) may be called the length direction of the rotary valve (1), the second direction (Y) may be called the width direction of the rotary valve (1), and the third direction (Z) may be called the height direction of the rotary valve (1).

[0029] The rotary valve (1) can control the flow path of the fluid. The rotary valve (1) can change the path through which the fluid flows toward the rotary valve (1) and the path through which the fluid is discharged from the rotary valve (1) into various forms. For example, the fluid whose flow path is controlled by the rotary valve (1) may be cooling water, etc.

[0030] The valve body (10) may have a preset length in the first direction (X). The valve body (10) may have a preset width in the second direction (Y). The valve body (10) may have a preset height in the third direction (Z).

[0031] A receiving space (11) may be located inside the valve body (10). The receiving space (11) may have a preset length in the first direction (X). Hereinafter, in one configuration, the surface facing the center area of ​​the receiving space (11) may be called the inner surface, and the surface facing the space located outside the valve body (10) may be called the outer surface.

[0032] A flow hole (100) may be located on one side of the valve body (10). The inner end of the flow hole (100) is connected to a receiving space (11), and the outer end of the flow hole (100) may be located on the outer surface of the valve body (10) and connected to the outside. The flow hole (100) may be located on one side of the valve body (10) in the height direction. A plurality of flow holes (100) may be provided, and the plurality of flow holes (100) may be spaced apart from each other while forming a flow hole arrangement line (12) along a first direction (X). Additionally, a plurality of flow hole arrangement lines (12) may be provided in a direction intersecting the first direction (X). FIG. 2 illustrates a case where two flow hole arrangement lines (12) are spaced apart from each other in the width direction.

[0033] A branch hole (101) may be branched from at least one of the plurality of flow holes (100). One end of the branch hole (101) is connected to the flow hole (100), and the other end of the branch hole (101) may be located on the outer surface of the valve body (10) and connected to the outside. The other end of the branch hole (101) may be located on the outer surface of the valve body (10) in the height direction or on the outer surface of the valve body (10) in the width direction.

[0034] A connection hole (110) may be located on one side in the longitudinal direction of the valve body (10). The connection hole (110) may be connected to a receiving space (11). The area of ​​the connection hole (110) along the direction orthogonal to the first direction (X) may be provided to be smaller than the area of ​​the receiving space (11) along the direction orthogonal to the first direction (X).

[0035] An opening (120) may be located on one side of the valve body (10). The opening (120) is formed to penetrate the valve body (10), and the receiving space (11) may be open to the outside in the area where the opening (120) is located. The opening (120) may be located on the opposite side of the area where the flow hole (100) is located, with the central area of ​​the receiving space (11) in between, along a direction intersecting the first direction (X). The flow hole (100) may be located on one side in the height direction of the valve body (10), and the opening (120) may be located on the other side in the height direction of the valve body (10). The opening (120) may be located in an area including both ends of the valve body (10) along the first direction (X). For example, the opening (120) may be located across both ends of the valve body (10) along the first direction (X). That is, the opening (120) is provided to have a predetermined length along the first direction (X), so that both ends of the opening (120) along the first direction (X) may be located at each end of the valve body (10) along the first direction (X). Additionally, the opening (120) may be provided in a structure where the areas located at both ends of the valve body (10) along the first direction (X) are separated from each other. That is, the opening (120) may be located at each end of the valve body (10) along the first direction (X). FIG. 6 illustrates a case where the opening (120) is located along the first direction (X) from one end to the other end of the valve body (10).

[0036] At least one fastening part (130) may be located on the outer surface of the valve body (10). The fastening part (130) may be located on one or both sides of the first direction (X) of the valve body (10). The fastening part (130) may be located on one or both sides of the second direction (Y) of the valve body (10). The fastening part (130) may be located on one or both sides of the third direction (Z) of the valve body (10).

[0037] One side of the valve body (10) can be connected to a device that is additionally connected to the rotary valve (1) through a connecting part (130). For example, the connecting part (130) may include a hole structure into which a component such as a bolt or pin can be inserted.

[0038] A cover (20) may be connected to one side of the valve body (10) and provided to cover the opening (120). The cover (20) may be provided to be detachably attached to the valve body (10). The cover (20) may be provided to have an area larger than that of the opening (120).

[0039] The rotor (30) may be located in a receiving space (11) inside the valve body (10). The rotor (30) may be provided to be rotatable about a first direction (X) as an axis inside the valve body (10). For example, one end of the rotor (30) may be connected to a driving member, such as a motor, and may be rotated by power provided by the driving member.

[0040] The general shape of the rotor (30) may be a cylindrical shape having a preset length along the first direction (X). Both ends of the rotor (30) along the first direction (X) may be rotatably supported on the valve body (10). At this time, the support of both ends of the rotor (30) on the valve body (10) includes not only the case where the rotor (30) is supported in a manner that directly contacts the valve body (10), but also the case where an additional connecting configuration is positioned between the rotor (30) and the valve body (10), so that the rotor (30) is supported on the valve body (10) through the connecting configuration. As the rotor (30) rotates relative to the valve body (10), the shape of the flow path formed by the plurality of flow holes (100) and the rotor (30) may change.

[0041] The seal member (40) may be located in the receiving space (11) on the inner side of the valve body (10). The seal member (40) may be located between the valve body (10) and the rotor (30). The seal member (40) may have a plate-like structure and may be provided to cover a portion of the inner surface of the valve body (10). The seal member (40) may be located in the area on the inner surface of the valve body (10) where the inner end of the flow hole (100) is located. Accordingly, the seal member (40) may be located around the outer circumference of the inner end of the flow hole (100). A hole may be located in the seal member (40) in an area aligned with the inner end of the flow hole (100), so that the flow hole (100) may be connected to the receiving space (11).

[0042] The seal member (40) may be provided in a fixed form relative to the inner surface of the valve body (10). For example, the inner surface of the valve body (10) and the outer surface of the seal member (40) may be provided in a contact state. Additionally, a fixing projection (410) may be located on one of the inner surface of the valve body (10) and the outer surface of the seal member (40), and a fixing groove (420) into which the fixing projection (410) is inserted may be located on the other. Accordingly, the seal member (40) may be fixedly installed at a predetermined position on the inner surface of the valve body (10) by inserting the fixing projection (410) into the fixing groove (420). Furthermore, the seal member (40) may be prevented from deviating from the predetermined position relative to the valve body (10) due to friction occurring between the rotor (30) and the inner surface of the seal member (40) during the process of the rotor (30) rotating.

[0043] The inner surface of the seal member (40) and the outer surface of the seal member (40) may be provided with different materials. The inner surface of the seal member (40) may be provided with a material having a lower friction coefficient than the outer surface of the seal member (40). The outer surface of the seal member (40) may be provided with a material having a higher surface pressure than the inner surface of the seal member (40). For example, the inner surface of the seal member (40) may include polytetrafluoroethylene (PTFE), polyacetal (POM), ultra-high molecular weight polyethylene (UHMWPE), etc., and the outer surface of the seal member (40) may include rubber, etc.

[0044] The retainer (50) may be positioned on one side of the outer circumference of the rotor (30). The retainer (50) may be positioned in an area opposite the seal member (40) with the rotor (30) in between, thereby pressing the rotor (30) toward the seal member (40). The retainer (50) may be positioned in an area where the opening (120) is located. Accordingly, after the retainer (50) is inserted and installed in an inner area of ​​the valve body (10) through the opening (120), and the cover (20) is positioned in the opening (120), the retainer (50) may be secured by the cover (20) and the valve body (10). For example, at least a portion of the inner surface of the retainer (50) may be positioned in contact with the rotor (30), and at least a portion of the outer surface of the retainer (50) may be provided in contact with the cover (20).

[0045] At least a portion of the inner surface of the retainer (50) may have a structure that is concave toward the opposite direction of the rotor (30). For example, at least a portion of the inner surface of the retainer (50) may have an arc structure having a preset radius of curvature. Accordingly, the inner surface of the retainer (50) can more effectively press the rotor (30) toward the seal member (40).

[0046] By means of the retainer (50), the inner surface of the rotor (30) and the cover (20) can be provided in a non-contact state.

[0047] The retainer (50) may have a predetermined length along a direction intersecting the first direction (X). The retainer (50) may have a predetermined length along the outer circumference direction of the rotor (30). The retainer (50) may have a predetermined width along the first direction (X). The width of the retainer (50) may be smaller than the length of the retainer (50). The retainer (50) may have a rod structure having a predetermined length along a direction intersecting the first direction (X). For example, the width of the retainer (50) may be 1 / 3 or less of the length of the retainer (50). Accordingly, when the rotor (30) rotates, excessive frictional force between the rotor (30) and the retainer (50) can be prevented.

[0048] At least one retainer (50) may be positioned on the outer circumference of the rotor (30). For example, at least one retainer (50) may be positioned on the outer circumference of each of the longitudinal ends of the rotor (30).

[0049] Additionally, a plurality of retainers (50) may be positioned spaced apart along the longitudinal direction of the rotor (30). At this time, two retainers (50) located at both ends along the longitudinal direction of the rotor (30) may each be positioned on the outer circumference of both ends along the longitudinal direction of the rotor (30).

[0050] FIG. 6 illustrates a case where four retainers (50) are spaced apart along the longitudinal direction of the rotor (30).

[0051] FIG. 7 is a drawing showing a rotor (30), FIG. 8 is a cross-sectional view along the longitudinal direction of the rotor (30), and FIG. 9 to 11 are drawings explaining the structure of the path control groove (320) of the rotor (30).

[0052] Referring to FIGS. 7 to 11, the rotor (30) may include a shaft portion (31) and a cylindrical portion (32).

[0053] The shaft portion (31) may have a preset length along the first direction (X). The shaft portion (31) is provided to have a hollow structure, so that a center flow path (310) may be located inside the shaft portion (31).

[0054] The shaft portion (31) may include a shielding wall (311) located at one end of the center flow path (310). One end of the center flow path (310) is blocked by the shielding wall (311). The other end of the center flow path (310) may have a structure that is open toward the outside. When the rotor (30) is located inside the valve body (10), the other end of the center flow path (310) may be connected to a connection hole (110). Accordingly, the connection hole (110) may form a path through which fluid flows into the center flow path (310) or is discharged from the center flow path (310).

[0055] The cylindrical portion (32) may be located on the outer circumference of the shaft portion (31). The schematic structure of the cylindrical portion (32) may be a cylinder having a preset radius along the radial direction centered on the rotation axis of the rotor (30) and a preset length in the first direction (X).

[0056] Path control grooves (320) and shielding parts (321) may be located on the outer circumference of the cylindrical part (32).

[0057] A plurality of path control grooves (320) may be located on the outer circumference of the cylindrical portion (32). The path control grooves (320) may have a groove structure that is concave toward the center region of the rotor (30) where the shaft portion (31) is located. The path control grooves (320) may have an area corresponding to the region where one flow hole (100) or a plurality of flow holes (100) are located. Accordingly, depending on the position where the outer circumference of the rotor (30) is aligned with the valve body (10), the path control grooves (320) may be aligned with one or a plurality of flow holes (100). At least one of the plurality of path control grooves (320) may be provided with a shape of the outer circumference of the upper portion that is different from the others.

[0058] A leak-prevention rib (325) may be positioned on the outer perimeter of the top of the path control groove (320). The leak-prevention rib (325) may be provided to protrude outwardly to a preset height toward the opposite side of the center area of ​​the rotor (30) from the adjacent area. The leak-prevention rib (325) may be provided in a closed curve structure surrounding the top of the path control groove (320). When the path control groove (320) is positioned to be aligned with the flow hole (100), the leak-prevention rib (325) is positioned in contact with the seal member (40). For example, when the path control groove (320) is positioned to be aligned with the flow hole (100), the leak-prevention rib (325) may be in a state of pressing against the seal member (40). Accordingly, when the path control groove (320) and the flow hole (100) are aligned, fluid leakage between the seal member (40) and the rotor (30) can be prevented.

[0059] As illustrated in FIG. 9, at least one of the path control grooves (320) may have a shape corresponding to an area where the inner end of at least two flow holes (100) arranged along the flow hole arrangement line (12) is located. Such a path control groove (320) may be called a line direction path control groove (320). The line direction path control groove (320) is provided such that the width in the direction of the flow hole arrangement line (12) is greater than the width in the direction orthogonal to the direction of the flow hole arrangement line (12), so that the length direction may face the flow hole arrangement line (12). When the line direction path control groove (320) is aligned with one of the flow hole arrangement lines (12), a plurality of flow holes (100) aligned with the line direction path control groove (320) are connected to each other through the line direction path control groove (320) to form a single path through which fluid flows.

[0060] At least one of the path control grooves (320) may have an area corresponding to the area where the inner ends of at least two flow holes (100) are located in each of the flow hole arrangement lines (12) adjacent to each other.

[0061] As illustrated in FIG. 10, at least one of the path control grooves (320) may have a shape corresponding to an area where the inner ends of at least two adjacent flow holes (100) are located in a direction intersecting the first direction (X). Such a path control groove (320) may be called a transverse path control groove (320). The transverse path control groove (320) may be provided such that the width in the direction intersecting the flow hole arrangement line (12) is greater than the width in the direction of the flow hole arrangement line (12), so that the length direction may face the direction intersecting the flow hole arrangement line (12). When the transverse path control groove (320) is aligned with at least two adjacent flow hole arrangement lines (12), a plurality of flow holes (100) aligned with the transverse path control groove (320) are connected to each other through the transverse path control groove (320) to form a single path through which fluid flows.

[0062] As illustrated in FIG. 11, at least one of the path control grooves (320) may have a shape corresponding to an area where the inner ends of at least two adjacent flow holes (100) are located in a diagonal direction with respect to the first direction (X), respectively, and the inner ends of at least two adjacent flow holes (100) are located. Such a path control groove (320) may be called a diagonal path control groove (320). That is, the length direction of the diagonal path control groove (320) may be oriented diagonally with respect to the flow hole arrangement line (12). When the diagonal path control groove (320) is aligned with at least two adjacent flow hole arrangement lines (12), a plurality of flow holes (100) aligned with the diagonal path control groove (320) may be connected to each other through the diagonal path control groove (320) to form a single path through which fluid flows.

[0063] In addition, at least one of the path control grooves (320) may have a shape in which at least two of the shapes described above in FIGS. 9 to 11 are mixed.

[0064] At least one of the path control grooves (320) and the center flow path (310) can be connected by a connecting hole (350). Accordingly, the path control groove (320), the flow path formed by the flow hole (100), and the center flow path (310) can be connected by the connecting hole (350).

[0065] A shielding portion (321) may be formed in the area excluding the area where the path control groove (320) is located on the outer circumference of the cylindrical portion (32). At least one shielding portion (321) may be located on the outer circumference of the cylindrical portion (32). The shielding portion (321) may have a shape corresponding to the area where the inner end of one flow hole (100) is located, or may have a shape corresponding to the area where the inner ends of at least two flow holes (100) located adjacent to each other are located.

[0066] A leak-prevention rib (325) may be positioned on the outer circumference of the shielding portion (321). The leak-prevention rib (325) may be provided to protrude outwardly to a predetermined height toward the opposite side of the center region of the rotor (30) from the shielding portion (321). The leak-prevention rib (325) may be provided in a closed curve structure surrounding the shielding portion (321). When the shielding portion (321) is positioned to be aligned with the flow hole (100), the leak-prevention rib (325) is positioned in a state of contact with the seal member (40). For example, when the shielding portion (321) is positioned to be aligned with the flow hole (100), the leak-prevention rib (325) may be in a state of pressing against the seal member (40). Accordingly, with the shielding part (321) and the flow hole (100) aligned, fluid leakage between the seal member (40) and the rotor (30) can be prevented.

[0067] In a rotary valve (1) according to one embodiment, the seal member (40) is provided to cover a portion of the inner surface of the valve body (10), so that the seal member (40) is located only in a portion of the outer circumference of the rotor (30). Accordingly, when the rotor (30) rotates, friction between the rotor (30) and the seal member (40) can be reduced. At this time, the inner surface of the valve body (10) and the cylindrical portion (32) of the rotor (30) are provided in a non-contact state, so that friction between the valve body (10) and the rotor (30) can be minimized.

[0068] In addition, according to one embodiment, a rotary valve (1) may have a plurality of flow holes (100) arranged in a valve body (10) to form a flow hole arrangement line (12). Additionally, a plurality of flow hole arrangement lines (12) may be provided. When the rotor (30) rotates and the alignment state of the rotor (30) and the area where the flow holes (100) are located is adjusted, the shape of the flow path formed by the path control grooves (320) and the flow holes (100) may be changed according to the arrangement structure of the path control grooves (320) located on the outer circumference of the rotor (30). That is, as the rotor (30) rotates, if the area aligned with the flow holes (100) on the outer circumference of the rotor (30) changes, the path control grooves (320) aligned with the flow holes (100) change, and the shape of the flow path formed by the flow holes (100) and the path control grooves (320) changes. Accordingly, the rotary valve (1) according to one embodiment can rotate the rotor (30) to implement various shapes of flow paths.

[0069] Additionally, in a rotary valve (1) according to one embodiment, a retainer (50) may be positioned on one side of the outer circumference of the rotor (30). The retainer (50) is positioned in an area opposite to the seal member (40) with the rotor (30) in between, and can push the rotor (30) toward the seal member (40). Accordingly, even though the seal member (40) is positioned only in a part of the outer circumference of the rotor (30), fluid leakage between the rotor (30) and the seal member (40) can be prevented.

[0070] Additionally, in a rotary valve (1) according to one embodiment, a retainer (50) may be positioned in the area where the opening (120) of the valve body (10) is located. Accordingly, the retainer (50) is effectively installed inside the valve body (10), and the opening (120) can then be covered by a cover (20). At this time, the area of ​​the opening (120) may be provided with a size corresponding to the rotor (30). In this case, the rotor (30) and the retainer (50) are sequentially arranged inside the valve body (10) through the opening (120), and the opening (120) can be covered by a cover (20).

[0071] In addition, the rotary valve (1) according to one embodiment may have a center flow path (310) and a communication hole (350) located in the rotor (30) to form a flow path connecting a flow hole (100) located on one side of the valve body (10) and a connection hole (110) located on the other side of the valve body (10).

[0072] The above detailed description is illustrative of the present invention. Furthermore, the foregoing describes preferred embodiments of the present invention, and the present invention may be used in various other combinations, modifications, and environments. That is, modifications or alterations are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the disclosed content, and / or the scope of the art or knowledge. The described embodiments describe the best state for implementing the technical concept of the present invention, and various modifications required for specific fields of application and uses of the present invention are possible. Accordingly, the above detailed description of the invention is not intended to limit the present invention to the disclosed embodiments. Additionally, the appended claims should be interpreted as including other embodiments.

Claims

1. A valve body having a flow hole located on one side and a receiving space located on the inside; A rotor located in the above receiving space; A seal member positioned in the receiving space to cover the inner surface of the valve body in the area where the inner end of the flow hole is located; and A rotary valve comprising a retainer located in the area opposite to the seal member with the rotor in between.

2. In Paragraph 1, A rotary valve in which at least a portion of the inner surface of the retainer is positioned in contact with the rotor.

3. In Paragraph 1, A rotary valve having a structure in which at least a portion of the inner surface of the retainer is recessed toward the opposite direction of the rotor.

4. In Paragraph 1, The above retainer is a rotary valve having a rod structure having a preset length along a direction intersecting the longitudinal direction of the rotor.

5. In Paragraph 1, The above retainer is a rotary valve in which at least one is located on the outer circumference of each of the longitudinal ends of the rotor.

6. In Paragraph 1, An opening is formed through one side of the valve body to allow the receiving space to be opened toward the outside, and The above retainer is a rotary valve located in the area where the above opening is located.

7. In Paragraph 1, The above fluid holes are arranged along one direction, with a plurality of fluid hole arrangement lines forming a fluid hole arrangement line, and A rotary valve having a plurality of path control grooves located on the outer circumference of the rotor, the grooves having a concave groove structure facing the center region of the rotor.

8. In Paragraph 7, A rotary valve having at least one of the plurality of path control grooves having a shape corresponding to an area where at least two adjacent inner ends of the flow holes are located.

9. In Paragraph 1, The above rotor is, shaft portion; and It includes a cylindrical portion located on the outer circumference of the shaft portion, and A rotary valve in which a center flow path is located on the inner side of the shaft portion.

10. In Paragraph 9, A plurality of path control grooves having a groove structure that is concave toward the center region of the rotor are located on the outer circumference of the above-mentioned cylindrical part, and At least one of the above path control grooves is a rotary valve connected to the center Euro.

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