Control valve

Abstract

A control valve according to an embodiment of the present disclosure is provided with: a housing in which an inflow port and an outflow port are formed; and a rotating body having a shaft portion located on a first side in the axial direction and rotatably supported by the housing, and a valve body forming an internal space that opens toward a second side in the axial direction. In a state in which the outer peripheral surface of the valve body is slidably supported on a support surface formed by the housing, the rotating body switches communication and disconnection between at least one of the inlet and the outlet and the internal space through a communication port formed in the valve body in accordance with the rotation position of the rotating body. A first biasing member that biases the rotating body toward a first side in the axial direction is provided inside the rotating body.

Description

Technical Field

[0001] The present disclosure relates to control valves.

[0002] This application claims priority from Japanese Patent Application No. 2023-039655, filed in Japan on March 14, 2023, the contents of which are incorporated herein by reference. Background Art

[0003] Vehicles are equipped with a cooling system. This system cools heat-generating components (such as the engine or motor) by circulating coolant between them and heat-dissipating components (such as a radiator or heater). In the cooling system, a control valve is installed in the flow path connecting the heat-generating and heat-dissipating components to control the flow of coolant.

[0004] Research is underway to further reduce the size of control valves. For example, Patent Document 1 below discloses a configuration in which a first opening and a second opening are arranged side by side along the axial direction of the valve body. In Patent Document 1 below, a third opening is arranged at a different position in the valve body relative to the first and second openings in the circumferential direction so as to overlap with at least a portion of the first and second openings.

[0005] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Laid-Open No. 2015-59615. Summary of the Invention

[0006] Problems to be solved by the invention However, in the prior art, for example, a sealing mechanism needs to be provided between the port and the opening for each opening. Therefore, in the prior art, there is room for improvement in terms of reducing the number of parts or reducing costs.

[0007] The present disclosure provides a control valve capable of reducing the number of parts or lowering costs.

[0008] Solutions to Problems In order to solve the above-mentioned problems, the present disclosure adopts the following means.

[0009] The valve body has an outer diameter that is gradually increased from the outer diameter of the valve body to the outer diameter of the valve body, and an inner diameter that is opened when the valve body is opened is increased, and an inner diameter that is opened when the valve body is opened is increased. The valve body has an outer diameter that is gradually increased from the outer diameter of the valve body to the outer diameter of the valve body, and an inner diameter that is opened when the valve body is opened is increased. The valve body has an outer diameter that is gradually increased from the outer diameter of the valve body to the outer diameter of the valve body, and an inner diameter that is opened when the valve body is opened is increased, and an inner diameter that is opened when the valve body is opened is increased. The valve body has an outer diameter that is gradually increased, and an inner diameter that is opened when the valve body is opened is increased, and an inner diameter that is opened when the valve body is opened is increased. The valve body has an outer diameter that is gradually increased, and an inner diameter that is opened when the valve body is opened is increased, and an inner diameter that is opened when the valve body is opened is increased. The valve body has an outer diameter that is gradually increased, and an inner diameter that is opened when the valve body is opened is increased. The valve body has an outer diameter that is gradually increased, and an inner diameter that is opened when the valve body is opened is increased. The valve body has an outer diameter that is gradually increased, and an inner diameter that is opened when the valve body is opened is increased.

[0010] According to this solution, the outer peripheral surface of the valve body is directly supported by the supporting surface of the housing, eliminating the need for separate sealing components or bearings. This reduces the number of parts and assembly man-hours, resulting in a smaller and more cost-effective control valve.

[0011] By forming the valve body into a tapered shape, if the outer diameter of the rotor expands or contracts due to heat, the rotor will displace axially relative to the housing in proportion to the increase or decrease in outer diameter. Consequently, the valve body is stably supported on the housing regardless of the rotor's expansion or contraction, ensuring stable control valve operation.

[0012] According to this solution, a first force-applying member is provided inside the rotating body, applying force to the rotating body toward the first side in the axial direction. This allows the outer peripheral surface of the valve body to be pressed against the support surface. This ensures a tight seal between the outer peripheral surface of the valve body and the support surface. This prevents unintended leakage of coolant from the gap between the outer peripheral surface of the valve body and the support surface, allowing the desired flow rate of coolant to flow. Furthermore, the provision of the force-applying member inside the rotating body allows for axial miniaturization of the control valve compared to a case where the force-applying member is provided outside the rotating body.

[0013] (2) In the control valve involved in the above-mentioned scheme (1), it is preferred that the aforementioned housing has an opposing wall opposite to the aforementioned axial second side opening portion in the aforementioned valve body, the aforementioned first force-applying member is a coil spring extending along the aforementioned axial direction, and the aforementioned first force-applying member is interposed between the aforementioned opposing wall and the inner surface of the aforementioned rotating body through the aforementioned internal space.

[0014] According to this aspect, the outer peripheral surface of the valve body can be stably pressed toward the support surface, thereby ensuring the sealing performance between the outer peripheral surface of the valve body and the support surface.

[0015] (3) In the control valve involved in the above-mentioned scheme (2), it is preferred that the aforementioned valve body comprises: a valve bottom wall, which extends from the aforementioned shaft portion in a radial direction intersecting the aforementioned axial direction; and a sliding wall, which is connected to the outer peripheral edge of the aforementioned valve bottom wall and whose outer diameter gradually increases as it goes to the second side of the aforementioned axial direction, and the aforementioned axial first side end portion of the aforementioned first force-applying member is supported on the aforementioned valve bottom wall.

[0016] According to this aspect, the first side end portion of the first urging member can be stably supported.

[0017] (4) In the control valve according to the above-mentioned solution (3), it is preferred that the shaft portion includes a first support portion which protrudes further toward the second side in the axial direction than the valve bottom wall and supports the first side end portion in the axial direction of the first force-applying member in a radial direction intersecting the axial direction.

[0018] According to this aspect, the radial movement of the first biasing member relative to the valve body can be restricted, thereby enabling a stable biasing force to be exerted over a long period of time.

[0019] (5) In the control valve involved in any one of the above-mentioned schemes (2) to (4), it is preferred that a second support portion is provided on the above-mentioned opposing wall, which enters into the above-mentioned internal space through the above-mentioned second side opening portion of the above-mentioned valve body and supports the above-mentioned axial second side end portion of the above-mentioned first force-applying member in a radial direction intersecting with the above-mentioned axial direction.

[0020] According to this aspect, the radial movement of the first urging member relative to the opposing wall can be restricted, thereby enabling a stable urging force to be exerted over a long period of time.

[0021] (6) In the control valve according to any one of the above aspects (1) to (5), preferably, the shaft portion includes a recessed portion that opens toward the second side in the axial direction and communicates with the internal space.

[0022] According to this solution, when forming the rotating body by injection molding, the shaft portion can be prevented from becoming thicker. This prevents sink marks and other issues on the shaft portion, allowing the shaft portion to be formed with high precision. As a result, the rotating body can rotate stably. The recessed portion is formed recessed relative to the internal space, thus serving as a sedimentation point within the rotating body. Therefore, for example, contaminants in the coolant can be trapped within the recessed portion. This prevents contaminants from being caught between the outer peripheral surface of the valve body and the support surface.

[0023] (7) In the control valve involved in the above-mentioned scheme (6), it is preferred that the aforementioned shaft portion includes: a transmission portion, which penetrates the aforementioned housing along the aforementioned axial direction through a through hole formed in the aforementioned housing; and a connecting portion, which is connected to the aforementioned transmission portion on the first side of the aforementioned axial direction and is connected to the actuator, and a sealing ring is formed between the aforementioned transmission portion and the inner peripheral surface of the aforementioned through hole to seal the inside and outside of the aforementioned housing, and the aforementioned recess is formed at least in the aforementioned transmission portion.

[0024] According to this aspect, it is possible to suppress sink marks and the like in the transmission part and to form the transmission part with high precision. This can improve the sealing performance between the seal ring and the transmission part.

[0025] (8) In the control valve involved in the above-mentioned solution (1), it is preferred that the above-mentioned first force-applying member is a member selected from the group consisting of a magnet and a ferromagnetic body capable of being attracted to the above-mentioned magnet, and the above-mentioned housing is provided with a second force-applying member composed of the other member selected from the above-mentioned magnet and the above-mentioned ferromagnetic body.

[0026] According to this aspect, the valve body is pressed against the support surface by the urging force (magnetic force) generated between the first urging member and the second urging member, thereby ensuring sealing performance between the outer peripheral surface of the valve body and the support surface.

[0027] Furthermore, the urging member does not cross the inner space of the rotating body in the axial direction, and thus the pressure loss in the inner space can be reduced.

[0028] Effects of the Invention According to one aspect of the present disclosure, it is possible to reduce the number of parts or reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a block diagram of a cooling system according to an embodiment.

[0030] Figure 2 It is a perspective view of the control valve according to the first embodiment.

[0031] Figure 3 It is an exploded perspective view of the control valve according to the first embodiment.

[0032] Figure 4 is with Figure 2 The cross-sectional view corresponding to line IV-IV.

[0033] Figure 5 is with Figure 2 The cross-sectional view corresponding to the VV line.

[0034] Figure 6 yes Figure 4 Enlarged view of part VI.

[0035] Figure 7It is a bottom view of the cover according to the first embodiment.

[0036] Figure 8 It is a plan view of the control valve (first communication state) shown through the cover according to the first embodiment.

[0037] Figure 9 It is a plan view of the control valve (second communication state) shown through the cover according to the first embodiment.

[0038] Figure 10 The second embodiment involves Figure 6 Corresponding enlarged cross-sectional view.

[0039] Figure 11 It is a top view of a rotating body according to a modification. DETAILED DESCRIPTION

[0040] Next, embodiments of the present disclosure will be described based on the accompanying drawings. In the embodiments or modifications described below, corresponding structures are sometimes marked with the same symbols and descriptions are omitted. In the following description, expressions such as "parallel" or "orthogonal", "center", "coaxial", etc. that indicate relative or absolute configurations not only strictly represent such configurations, but also represent a state of relative displacement at an angle or distance with a tolerance or a degree that can achieve the same function. In this embodiment, the so-called "relative" is not limited to the case where the orthogonal directions (normal directions) of the two surfaces are consistent with each other, but also includes the case where the orthogonal directions intersect with each other.

[0041] [Cooling system 1] Figure 1 is a block diagram of the cooling system 1 .

[0042] like Figure 1 As shown, the cooling system 1 is mounted on a vehicle, for example. In this embodiment, the vehicle is not limited to a vehicle having an engine (internal combustion engine) as a driving source, but may also be an electric vehicle. Electric vehicles include electric vehicles, hybrid vehicles, plug-in hybrid vehicles, fuel cell vehicles, and the like.

[0043] The cooling system 1 includes a heat generating unit 2, a heat radiating unit 3, a water pump 4 (W / P), and a control valve 5 (EWV). In the cooling system 1, the water pump 4 and the control valve 5 operate to circulate the coolant between the heat generating unit 2 and the heat radiating unit 3.

[0044] The heat generating unit 2 is a component that is cooled by the coolant (or absorbs heat from the coolant), and is a driving source of the vehicle or other heat generating component. In the case of an electric vehicle, the heat generating unit 2 includes, for example, a driving motor, a battery, and a power conversion device.

[0045] The heat dissipation unit 3 is a component that dissipates heat from the coolant. In this embodiment, the heat dissipation unit 3 includes a radiator 8 (RAD) and a heater core 9 (HTR). Any component can be selected as the heat dissipation unit 3, as long as its temperature during normal operation is lower than the temperature of the coolant after passing through the heat dissipation unit 2. For example, the heat dissipation unit 3 may be an EGR cooler or a heat exchanger. An EGR cooler exchanges heat between EGR gas and the coolant. A heat exchanger exchanges heat between lubricating oil and the coolant.

[0046] The water pump 4, the heat generating unit 2, and the control valve 5 are connected in order from upstream to downstream on the main flow path 10. In the main flow path 10, the coolant passes through the heat generating unit 2 and the control valve 5 in order by the operation of the water pump 4.

[0047] The main flow path 10 is connected to a radiator flow path 11 and an air-conditioning flow path 12 .

[0048] The radiator 8 is provided in the radiator flow path 11. The radiator flow path 11 is connected to the control valve 5 at a portion located upstream of the radiator 8. The radiator flow path 11 is connected to the heat generating portion 2 at a portion located downstream of the radiator 8. In the radiator flow path 11, heat exchange between the coolant and the outside air is performed at the radiator 8.

[0049] The heater core 9 is provided in the air-conditioning flow path 12. The air-conditioning flow path 12 is connected to the control valve 5 at a portion upstream of the heater core 9. The air-conditioning flow path 12 is connected to the heat generating unit 2 at a portion downstream of the heater core 9. The heater core 9 is, for example, provided within a duct (not shown) of an air-conditioning device. In the air-conditioning flow path 12, the heater core 9 performs heat exchange between the coolant and the air conditioning air flowing within the duct.

[0050] In the cooling system 1, the coolant that flows into the control valve 5 by the action of the water pump 4 is selectively supplied to at least any one of the heat dissipating parts 3 due to the action of the control valve 5. The coolant supplied to the heat dissipating part 3 exchanges heat with the heat dissipating part 3 in the process of passing through the heat dissipating part 3. As a result, the coolant is cooled by the heat dissipating part 3. After the coolant that passes through the heat dissipating part 3 is supplied to the heat generating part 2, it exchanges heat with the heat generating part 2 in the process of passing through the heat generating part 2. As a result, the heat generating part 2 is cooled by the coolant. In this way, in the cooling system 1, in the process of circulating the coolant between the heat generating part 2 and the heat dissipating part 3, the coolant is cooled by the heat dissipating part 3, and at the same time, the heat generating part 2 is cooled by the coolant. As a result, in the cooling system 1, the heat generating part 2 can be controlled to a desired temperature.

[0051] (First embodiment) <Control valve 5> Figure 2It is a perspective view of the control valve 5 . Figure 3 It is an exploded perspective view of the control valve 5 .

[0052] like Figure 2 、 Figure 3 As shown, the control valve 5 includes a housing 21 , a drive unit 22 , a rotating body 23 , and a biasing member 24 .

[0053] <Housing 21> The housing 21 includes a housing body 31 and a cover 32. In the following description, the direction along the central axis O1 of the rotating body 23 is simply referred to as the axial direction. In the axial direction, the drive unit 22 side is considered the lower side (the first side), and the cover 32 side is considered the upper side (the second side). The direction intersecting the central axis O1, as viewed from the axial direction, is referred to as the radial direction, and the direction surrounding the central axis O1 is referred to as the circumferential direction.

[0054] <Casing Body 31> The housing body 31 includes a base portion 33, a first outflow port 34, and a second outflow port 35. The base portion 33, the first outflow port 34, and the second outflow port 35 are integrally formed by, for example, injection molding a resin material.

[0055] The base portion 33 is formed in a bottomed cylindrical shape that is open upward. Specifically, the base portion 33 includes a mounting base 41 and a rotating body accommodating portion 42.

[0056] Figure 4 is with Figure 2 The cross-sectional view corresponding to line IV-IV. Figure 5 is with Figure 2 The cross-sectional view corresponding to the VV line.

[0057] like Figure 4 、 Figure 5 As shown, the mounting base 41 is the portion on which the drive unit 22 is mounted. The mounting base 41 includes a partition wall 41a and an upright wall 41b. The partition wall 41a is sized to extend radially outward relative to the rotating body housing 42 when viewed from above from the axial direction. The upright wall 41b extends downward from the outer peripheral edge of the partition wall 41a.

[0058] Figure 6 yes Figure 4 Enlarged view of part VI.

[0059] like Figure 6As shown, a through-hole 45 is formed in the portion of the dividing wall 41a located on the central axis O1, extending axially through the dividing wall 41a. The through-hole 45 is formed in a stepped shape. The inner diameter of the axially central portion of the through-hole 45 is smaller than the inner diameters of the upper and lower ends. Specifically, the through-hole 45 comprises a first large-diameter portion 45a located at the bottom, a small-diameter portion 45b connected to the first large-diameter portion 45a from above, and a second large-diameter portion 45c connected to the small-diameter portion 45b from above. In the illustrated example, the inner diameters of the first large-diameter portion 45a and the second large-diameter portion 45c are the same. A sealing ring 46, such as an X-ring, is housed within the second large-diameter portion 45c. The sealing ring 46 is embedded in the inner circumference of the second large-diameter portion 45c, approaching or abutting the bottom surface of the second large-diameter portion 45c. The inner diameter of the sealing ring 46 is the same as that of the small-diameter portion 45b.

[0060] like Figure 4 、 Figure 5 As shown, the rotating body accommodating portion 42 houses the rotating body 23. The rotating body accommodating portion 42 is formed in a cylindrical shape, extending upward from the partition wall 41a. The lower opening of the rotating body accommodating portion 42 is closed by the partition wall 41a. The inner diameter of the rotating body accommodating portion 42 gradually increases from the bottom to the top. Specifically, the inner circumferential surface of the rotating body accommodating portion 42 includes a retracted surface 51, a transition surface 52, a support surface 53, and a positioning surface 54.

[0061] The escape surface 51 extends radially outward from the upper opening edge of the through hole 45 (the second large-diameter portion 45 c ) and is formed as a flat surface perpendicular to the axial direction.

[0062] The transition surface 52 extends upward from the outer peripheral edge of the retreat surface 51. The transition surface 52 is a cylindrical surface coaxial with the central axis O1. The transition surface 52 surrounds the entire circumference of the retreat surface 51.

[0063] The support surface 53 is continuous along the entire circumference of the upper edge of the transition surface 52. The support surface 53 is a tapered surface that extends radially outward as it moves from the bottom to the top. When viewed in cross section along the axial direction, the support surface 53 extends in a straight line. When viewed in cross section along the axial direction, the angle θ1 ( Figure 6 The taper angle shown in FIG. 5 is preferably 90°<θ1<180°, and more preferably 110°<θ1<160°. When viewed in cross section along the axial direction, the support surface 53 is formed symmetrically with respect to the central axis O1.

[0064] The positioning surface 54 extends upward from the upper edge of the support surface 53. The positioning surface 54 is a cylindrical surface coaxial with the central axis O1. The positioning surface 54 surrounds the entire circumference of the support surface 53.

[0065] like Figure 4As shown, a first outlet 53a and a second outlet 53b open on the support surface 53 in the rotating body housing 42. Each outlet 53a, 53b opens upward (to the second side in the axial direction) on the support surface 53. Each outlet 53a, 53b is formed on the same circumference (at the same height in the axial direction) at positions 180° apart in the circumferential direction. Each outlet 53a, 53b faces each other in the first radial direction (the opposing direction). The opening edge (the boundary with the support surface 53) of each outlet 53a, 53b is preferably formed in a curved shape. The inner diameter of each outlet 53a, 53b is the same. However, the position and size of each outlet 53a, 53b can be appropriately modified.

[0066] The first outflow port 34 connects, for example, the radiator flow path 11 to the control valve 5. The first outflow port 34 is integrally formed with the base portion 33. The first outflow port 34 is formed in an L-shaped tubular shape when viewed in cross-section along the axial direction. Specifically, the first outflow port 34 includes an outlet portion 34a located upstream and a junction portion 34b connected to the downstream side of the outlet portion 34a.

[0067] The lead portion 34a extends downward from the opening edge of the first outlet 53a. The first outlet port 34 communicates with the first outlet 53a via the lead portion 34a. The lower end of the lead portion 34a is located between the lower surface of the partition wall 41a and the lower edge of the rising wall 41b.

[0068] The joint portion 34b extends outward in the first direction from the lower end of the lead portion 34a. The outer end of the joint portion 34b in the first direction protrudes outward from the base portion 33. For example, the heat sink flow path 11 is connected to the outer end of the joint portion 34b.

[0069] The second outflow port 35 connects, for example, the air conditioning flow path 12 to the control valve 5. The second outflow port 35 is integrally formed with the base portion 33. The second outflow port 35 is formed symmetrically with the first outflow port 34 in the first direction, with the central axis O1 as the axis of symmetry. Specifically, the second outflow port 35 includes an outlet portion 35a located upstream and a junction portion 35b connected to the downstream side of the outlet portion 35a.

[0070] The lead portion 35a extends downward from the opening edge of the second outlet 53b. The second outlet port 35 communicates with the second outlet 53b via the lead portion 35a. The lower end of the lead portion 35a is located between the lower surface of the partition wall 41a and the lower edge of the rising wall 41b.

[0071] The joint portion 35b extends outward in the first direction from the lower end of the lead-out portion 35a. The outflow ports 34 and 35 are arranged linearly along the first direction. The outer end of the joint portion 35b in the first direction protrudes further outward than the base portion 33. For example, the air conditioning flow path 12 is connected to the outer end of the joint portion 35b.

[0072] <Cover 32> like Figures 3 to 5 As shown, the cover 32 closes the upper opening (second side opening) of the base portion 33 (rotating body housing portion 42). Specifically, the cover 32 includes an opposing wall 61, a positioning portion 62, a spring support portion 63, and an inlet port 64. The opposing wall 61, positioning portion 62, spring support portion 63, and inlet port 64 are integrally formed, for example, by injection molding a resin material.

[0073] The opposing wall 61 is formed in a plate shape with the axial direction as the thickness direction. The opposing wall 61 has a planar outer shape identical to that of the rotating body accommodating portion 42. The opposing wall 61 is assembled to the rotating body accommodating portion 42 so that it overlaps with the upper surface of the rotating body accommodating portion 42. This seals the upper end opening of the base portion 33 with the lid 32. A gasket, such as an O-ring, is interposed between the opposing wall 61 and the base portion 33 (rotating body accommodating portion 42).

[0074] Figure 7 It is a bottom view of the cover 32. Figure 8 It is a top view of the control valve 5 shown through the cover 32 .

[0075] like Figure 7 、 Figure 8 As shown, an inlet 65 is formed in the opposing wall 61. The inlet 65 penetrates the opposing wall 61 in the axial direction and extends in the circumferential direction. In the example shown in the figure, the inlet 65 is formed in a C-shape when viewed from above. Specifically, the inlet 65 surrounds the center axis O1 on the other side in a second direction perpendicular to the first direction in the radial direction. One end of the inlet 65 in the circumferential direction overlaps with the first outlet 53a when viewed from above. The other end of the inlet 65 in the circumferential direction overlaps with the second outlet 53b when viewed from above.

[0076] like Figure 4 、 Figure 5 As shown, the positioning portion 62 protrudes downward from the outer periphery of the opposing wall 61. The positioning portion 62 is formed in a cylindrical shape and is coaxially arranged with the central axis O1. The positioning portion 62 is inserted into the inner side of the rotating body accommodating portion 42 when the cover 32 is assembled to the base 33. The positioning portion 62 radially positions the cover 32 relative to the base 33 by abutting against the positioning surface 54 from the radially inner side.

[0077] The spring support portion 63 protrudes downward from a portion of the opposing wall 61 located radially inward of the positioning portion 62. The spring support portion 63 is formed in a cylindrical shape coaxially with the central axis O1. The spring support portion 63 of this embodiment has a stepped shape, with the outer diameter decreasing toward the lower portion. Specifically, the spring support portion 63 includes an axial support portion 63a and a radial support portion 63b.

[0078] The axial support portion 63a constitutes the upper end portion of the spring support portion 63. The outer diameter of the axial support portion 63a is larger than the inner diameter of the large diameter portions 45a and 45c. The lower end surface of the axial support portion 63a is formed as a flat surface perpendicular to the axial direction.

[0079] The radial support portion 63b protrudes downward from the spring support portion 63. The outer diameter of the radial support portion 63b is smaller than that of the large-diameter portions 45a and 45c, and larger than the inner diameter of the small-diameter portion 45b. Therefore, the radial support portion 63b axially opposes the seal ring 46. The inner diameter of the spring support portion 63 is uniformly formed throughout the axial support portion 63a and the radial support portion 63b. In the illustrated example, the inner diameter of the spring support portion 63 is the same as that of the small-diameter portion 45b.

[0080] like Figure 4 、 Figure 5 、 Figure 7 As shown, the inflow port 64 connects the main flow path 10 and the control valve 5. The inflow port 64 includes a branch flow path 71 and a common flow path 72.

[0081] The branch flow path 71 covers the inlet 65 from above and is formed in a dome shape that bulges upward relative to the opposing wall 61. The branch flow path 71 (each branch portion 71a, 71b) is formed in a semicircular shape in a cross-section perpendicular to the extending direction of the branch flow path 71.

[0082] In the illustrated example, the branch channel 71 has the same outer shape as the inlet 65 when viewed from above, forming a C-shape extending circumferentially. Specifically, the branch channel 71 includes a first branch portion 71a extending toward one side from the circumferential center of the branch channel 71, and a second branch portion 71b extending toward the other side from the circumferential center of the branch channel 71. The branch channel 71 communicates with the inlet 65 along its entire length (circumferential direction). The opening area of ​​the lower end opening of the branch channel 71 is the same as that of the inlet 65.

[0083] The common flow path 72 and the branch flow paths 71 are located on the same plane, perpendicular to the central axis O1. Specifically, the common flow path 72 protrudes from the center of the branch flow path 71 in the extension direction (circumferential direction) toward one side in the second direction. The base end of the common flow path 72 communicates with the branch flow path 71. The front end of the common flow path 72 is connected to the main flow path 10. The front end of the common flow path 72 protrudes outward in the second direction relative to the opposing wall 61. The coolant flowing from the main flow path 10 into the common flow path 72 is distributed to the first branch portion 71a and the second branch portion 71b at the front end of the common flow path 72.

[0084] The common flow path 72 extends in a direction perpendicular to the direction of extension of the outflow ports 34 and 35 (junctions 34b and 35b). The common flow path 72 is formed in a circular shape when viewed in a cross-section perpendicular to the second direction. The common flow path 72 bulges upward relative to the opposing wall 61 to a greater extent than the branch flow paths 71. Therefore, the upper edge of the common flow path 72 constitutes the uppermost edge of the control valve 5.

[0085] Here, the flow path cross-sectional areas (areas perpendicular to the respective extension directions) of the first branch portion 71a and the second branch portion 71b are formed uniformly throughout their entire circumferential length. The sum of the flow path cross-sectional areas of the first branch portion 71a and the second branch portion 71b is preferably greater than the flow path cross-sectional area (area perpendicular to the extension direction) of the common flow path 72. However, the sum of the flow path cross-sectional areas of the first branch portion 71a and the second branch portion 71b may be smaller than the flow path cross-sectional area of ​​the common flow path 72.

[0086] <Drive Unit 22> like Figure 3 As shown, the drive unit 22 is composed of a motor or a reduction mechanism, a control substrate, etc. (not shown). The drive unit 22 is arranged below the mounting base 41. The drive unit 22 is mounted on the upright wall 41b in a state where it overlaps with the mounting base 41 in the axial direction. Figure 6 As shown in FIG1 , the drive unit 22 includes an output shaft 22a that protrudes upward. The output shaft 22a is formed in a cylindrical shape and is arranged coaxially with the central axis O1.

[0087] <Rotating body 23> like Figure 3 、 Figure 4 As shown, the rotor 23 rotates inside the housing 21 to switch the connection and blockage between the inlet 65 and the outlets 53a and 53b. Specifically, the rotor 23 includes a shaft 80 and a valve body 81. The rotor 23 is integrally formed by injection molding a resin material, for example.

[0088] like Figure 6As shown, the shaft portion 80 is arranged coaxially with the central axis O1 and extends axially through the through hole 45. Specifically, the shaft portion 80 includes a coupling portion 80a constituting the lower end portion of the shaft portion 80 and a transmission portion 80b connected to the upper portion of the coupling portion 80a.

[0089] The coupling portion 80a is solid. The lower portion of the coupling portion 80a is embedded within the inner side of the output shaft 22a. In this embodiment, the coupling portion 80a is coupled to the output shaft 22a with the male splines formed on the outer circumferential surface of the coupling portion 80a circumferentially meshing with the female splines formed on the inner circumferential surface of the output shaft 22a. Thus, the coupling portion 80a is configured to rotate about the central axis O1 as the output shaft 22a rotates. The upper portion of the coupling portion 80a is positioned within the inner side of the first large-diameter portion 45a. An upwardly recessed recess 80a1 is formed on the lower end surface of the coupling portion 80a.

[0090] The transmission portion 80b is formed in a bottomed cylindrical shape (hollow shape) coaxial with the central axis O1. The inner side of the transmission portion 80b forms a recessed portion 84 that is open upward. The transmission portion 80b includes a connecting portion 85 and a peripheral wall portion 86.

[0091] The connecting portion 85 is formed in a disk shape that is larger than the outer shape of the connecting portion 80a when viewed from above. The connecting portion 85 is connected to the upper end surface of the connecting portion 80a in a state that extends radially outward relative to the outer peripheral surface of the connecting portion 80a. The connecting portion 85 is arranged on the inner side of the small diameter portion 45b. A concave portion 85a that is concave downward is formed on the upper end surface of the connecting portion 85. The concave portion 85a is connected to the concave portion 84 on the upper end surface of the connecting portion 85. A concave portion 80a1 that is concave upward is formed on the lower end surface of the connecting portion 80a. The connecting portion 80a can also be formed in a hollow shape.

[0092] The peripheral wall portion 86 extends upward from the outer peripheral edge of the connecting portion 85. The peripheral wall portion 86 is formed in a multi-stage cylindrical shape with the outer diameter gradually increasing as it goes upward. Specifically, the peripheral wall portion 86 includes a small cylindrical portion 86a, an extension portion 86b, and a large cylindrical portion 86c.

[0093] Small cylindrical portion 86a is formed in a cylindrical shape with an outer diameter equal to that of connecting portion 85. Small cylindrical portion 86a is positioned inside second large-diameter portion 45c. The inner circumferential surface of seal ring 46 is in close contact with the outer circumferential surface of small cylindrical portion 86a. This blocks the communication between the interior and exterior of housing 21 through through-hole 45.

[0094] The extension portion 86b extends radially outward from the upper opening edge of the small cylindrical portion 86a. The extension portion 86b axially opposes the second large-diameter portion 45c, with at least a portion thereof projecting into the rotating body accommodating portion 42. This prevents the seal ring 46 from falling through the upper opening of the second large-diameter portion 45c. The outer diameter of the extension portion 86b is set to be less than the inner diameter of the second large-diameter portion 45c.

[0095] The large cylindrical portion 86c is formed in a cylindrical shape extending upward from the outer peripheral edge of the protruding portion 86b and faces the radial support portion 63b in the axial direction.

[0096] like Figure 4 、 Figure 5 As shown, the valve body 81 is formed in the shape of a truncated cone that opens upward. The valve body 81 is arranged in the rotating body accommodating portion 42 in a manner that allows it to rotate around the central axis O1 as the shaft portion 80 rotates. Specifically, the valve body 81 includes a valve bottom wall 91 and a sliding wall 92. The space in the valve body 81 surrounded by the valve bottom wall 91 and the sliding wall 92 constitutes the internal space K1 of the valve body 81. The internal space K1 is open to the top. Therefore, the above-mentioned inlet 65 is always connected to the internal space K1. The internal space K1 is connected to the recessed portion 84 at the lower end.

[0097] The valve bottom wall 91 extends radially outward from the lower end of the large cylindrical portion 86c. Therefore, the large cylindrical portion 86c protrudes upward from the valve bottom wall 91 toward the interior space K1 of the valve body 81. The valve bottom wall 91 faces the retreat surface 51 with a gap therebetween in the axial direction. In the illustrated example, the lower surface of the valve bottom wall 91 is located below the upper end of the transition surface 52. The upper surface of the valve bottom wall 91 is located above the upper end of the transition surface 52.

[0098] The sliding wall 92 is connected to the outer peripheral edge of the valve bottom wall 91. The sliding wall 92 is formed in a tapered cylindrical shape that gradually expands in diameter as it goes upward. The upper end opening of the sliding wall 92 faces the opposing wall 61. The spring support portion 63 described above enters the internal space K1 through the upper end opening of the sliding wall 92. In the illustrated example, the entire radial support portion 63b of the spring support portion 63 and the lower end of the axial support portion 63a enter the internal space K1. The spring support portion 63 may be at least partially inserted into the internal space K1 or located above the internal space K1.

[0099] The sliding wall 92 has a uniform thickness throughout its entire vertical region when viewed in cross section along the axial direction, and extends linearly outward in the radial direction as it goes upward. The outer peripheral surface of the sliding wall 92 extends in a manner similar to the support surface 53. Therefore, when viewed in cross section along the axial direction, the angle θ2 ( Figure 6The tapered angle θ1 of the support surface 53 is the same as the tapered angle θ2 of the support surface 53. Angle θ2 is preferably 90° < θ2 < 180°, and more preferably 110° < θ2 < 160°. The outer peripheral surface of the sliding wall 92 slides on the support surface 53 as the valve body 81 rotates. The support surface 53 rotatably supports the valve body 81 via the sliding wall 92. The upper edge of the sliding wall 92 approaches the positioning surface 54 from the radially inner side.

[0100] The sliding wall 92 is formed with a communication port 92a that extends axially through the sliding wall 92. When the communication port 92a and at least a portion of either outlet 53a or 53b overlap in a plan view, the valve body 81 connects either outlet 53a or 53b to the internal space K1 through the communication port 92a. When the communication port 92a does not overlap with either outlet 53a or 53b, the valve body 81 blocks the connection between the internal space K1 and the outlets 53a or 53b. Two communication ports 92a in this embodiment are formed at intervals along the circumferential direction. In the illustrated example, the inferior angle of the conjugate angle formed by the straight lines connecting the central axis O1 and each of the communication ports 92a is greater than 90° and less than 180°. However, the number of communication ports 92a and the spacing between adjacent communication ports 92a can be appropriately varied.

[0101] <Force applying member 24> The biasing member 24 is, for example, a flat coil spring. It is positioned coaxially with the central axis O1 and sandwiched between the valve bottom wall 91 and the axial support portion 63a. The biasing member 24 is entirely located within the internal space K1. The biasing member 24 is disposed within the interior of the rotating body 23. It is sufficient that the biasing member 24 is at least disposed within the interior of the rotating body 23.

[0102] The force-applying member 24 applies force to the valve body 81 downward. The sliding wall 92 is pressed against the support surface 53 by the force of the force-applying member 24. A radial support portion 63b is inserted into the inner side of the upper end portion of the force-applying member 24. The force-applying member 24 abuts against the radial support portion 63b from the radial direction, thereby limiting the radial movement relative to the housing 21. A large cylindrical portion 86c is inserted into the inner side of the lower end portion of the force-applying member 24. The force-applying member 24 abuts against the large cylindrical portion 86c from the radial direction, thereby limiting the radial movement relative to the housing 21. In this embodiment, the structure in which the force-applying member 24 is indirectly supported on the opposing wall 61 via the spring support portion 63 is described, but it is not limited to this structure. The force-applying member 24 may also be directly supported on the opposing wall 61.

[0103] [Operation method of control valve 5] Next, the operating method of the control valve 5 will be described.

[0104] like Figure 1As shown, in the main flow path 10, the coolant sent by the water pump 4 is heat exchanged at the heat generating portion 2 and then flows toward the control valve 5. Figure 4 As shown, the coolant passing through the heat generating portion 2 in the main flow path 10 flows through the inlet port 64 and then flows into the internal space K1 through the inlet 65. As a result, the entire area inside the base portion 33 is filled with the coolant.

[0105] Next, a method of distributing the coolant in the control valve 5 will be described.

[0106] When the communication port 92a and the outflow ports 53a, 53b do not overlap, the communication between the internal space K1 and the outflow ports 53a, 53b (outflow ports 34, 35) through the communication port 92a is blocked (blocked state). In the blocked state, the coolant in the internal space K1 is restricted from flowing through the communication port 92a to the outflow ports 53a, 53b.

[0107] For example, when it is desired to supply the coolant to the radiator 8, Figure 8 As shown, the connecting port 92a is connected to the first outlet 53a. Specifically, the drive unit 22 is driven to rotate the rotating body 23 about the central axis O1. At this time, the outer peripheral surface of the sliding wall 92 slides on the support surface 53, and the rotating body 23 rotates about the central axis O1. Moreover, at least a portion of the connecting port 92a and the first outlet 53a overlap, so that the connecting port 92a is connected to the first outlet 53a (first connected state). In the first connected state, the coolant in the internal space K1 flows out through the connecting port 92a. The coolant flowing out of the internal space K1 passes through the first outlet 53a and is distributed to the radiator flow path 11 through the first outlet port 34. The coolant distributed to the radiator flow path 11 returns to the main flow path 10 after passing through the radiator 8, and flows into the control valve 5 again.

[0108] In the case where the coolant is to be supplied to the heater core 9, the same method as described above is used. Figure 9 As shown, the communication port 92 a is connected to the second outlet port 53 b (second communication state). As a result, the coolant flowing out of the internal space K1 passes through the second outlet port 53 b and is distributed to the air-conditioning flow path 12 through the second outlet port 35 .

[0109] As described above, in the control valve 5 of this embodiment, the connection and blockage of the internal space K1 and the outflow ports 53a, 53b through the communication port 92a are switched according to the rotational position of the rotor 23. This allows the coolant to be distributed to a desired flow path.

[0110] In the control valve 5 of this embodiment, the rotor 23 includes a valve body 81 whose outer diameter gradually increases upward from the shaft portion 80 , and the outer peripheral surface of the valve body 81 is slidably supported on the housing 21 .

[0111] According to this structure, the valve body 81 is directly supported by the housing 21, and no additional sealing member or bearing is required. Therefore, the number of parts and assembly man-hours can be reduced, and the control valve 5 can be miniaturized and reduced in cost.

[0112] By forming the valve body 81 into a tapered shape, if the outer diameter of the rotor 23 expands or contracts due to heat, the rotor 23 will displace axially on the support surface 53 in accordance with the increase or decrease in the outer diameter. Therefore, regardless of the expansion or contraction of the rotor 23, the valve body 81 is stably supported on the support surface 53. Consequently, the operational stability of the control valve 5 can be ensured.

[0113] In particular, the control valve 5 of the present embodiment is configured such that the urging member (first urging member) 24 is provided inside the rotating body 23 .

[0114] This configuration presses the outer circumferential surface of the valve body 81 (sliding wall 92) against the support surface 53, ensuring a tight seal between the outer circumferential surface of the valve body 81 and the support surface 53. This prevents unintended leakage of coolant from the gap between the outer circumferential surface of the valve body 81 and the support surface 53, allowing the desired flow rate of coolant to flow. Furthermore, the provision of the biasing member 24 within the rotating body 23 allows for a reduction in the axial size of the control valve 5 compared to a configuration in which the biasing member is provided externally.

[0115] In the control valve 5 of the present embodiment, the urging member 24 is configured as a coil spring interposed between the facing wall 61 and the inner surface of the rotating body 23 through the internal space K1 .

[0116] According to this structure, the outer peripheral surface of the valve body 81 can be pressed stably toward the support surface 53. Therefore, the sealing performance between the outer peripheral surface of the valve body 81 and the support surface 53 can be ensured.

[0117] Furthermore, in the control valve 5 of this embodiment, the use of a flat coil spring can reduce the frictional force generated by the relative rotation of at least one of the valve bottom wall 91 and the axial support portion 63a with the biasing member 24 when the rotor 23 rotates. This improves durability.

[0118] In the control valve 5 of this embodiment, the valve body 81 includes a valve bottom wall 91 extending radially from the shaft portion 80 , and the lower end portion (first side end portion) of the urging member 24 is supported by the valve bottom wall 91 .

[0119] According to this configuration, the lower end portion of the urging member 24 can be stably supported.

[0120] In the control valve 5 of the present embodiment, the shaft portion 80 includes a large cylindrical portion (first support portion) 86 c that projects upward from the valve bottom wall 91 and supports the lower end portion of the urging member 24 in the radial direction.

[0121] According to this structure, the radial movement of the urging member 24 relative to the valve body 81 can be restricted. As a result, a stable urging force can be exerted over a long period of time.

[0122] In the control valve 5 of this embodiment, the opposing wall 61 is provided with a radial support portion 63 b that enters the internal space K1 through the upper end opening of the valve body 81 and radially supports the upper end portion (second side end portion) of the urging member 24 .

[0123] According to this configuration, the radial movement of the urging member 24 relative to the facing wall 61 (cover 32 ) can be restricted, thereby enabling a stable urging force to be exerted over a long period of time.

[0124] In the control valve 5 of the present embodiment, a configuration is adopted in which a recessed portion 84 that opens upward and communicates with the internal space K1 is formed in the shaft portion 80 .

[0125] This configuration prevents the shaft portion 80 from becoming thicker when the rotating body 23 is formed by injection molding. This prevents sink marks and other issues on the shaft portion 80, allowing the shaft portion 80 to be molded with high precision. Consequently, the rotating body 23 can rotate stably. The recessed portion 84 is recessed relative to the internal space K1, thus serving as a settling point within the rotating body 23. Therefore, for example, contaminants in the coolant can be trapped within the recessed portion 84. This prevents contaminants from being caught between the outer peripheral surface of the valve body 81 and the support surface 53.

[0126] In the control valve 5 of the present embodiment, the recessed portion 84 is formed at least in the transmission portion 80 b .

[0127] According to this structure, it is possible to suppress sink marks and the like in the transmission portion 80b and form the transmission portion 80b with high precision. As a result, it is possible to improve the sealing performance between the seal ring 46 and the transmission portion 80b.

[0128] Furthermore, in this embodiment, the recessed portion 84 is located inside the large cylindrical portion 86 c , so that the large cylindrical portion 86 c can be formed with high precision.

[0129] In this embodiment, the recessed portions 80a1 and 85a are formed in the coupling portion 80a, so that the coupling portion 80a can be formed with high precision, thereby firmly coupling the coupling portion 80a to the drive unit 22 (output shaft 22a).

[0130] In the first embodiment, the large cylindrical portion 86c as the first support portion supports the lower end portion of the urging member 24 from the radially outer side, but the present invention is not limited to this configuration. The first support portion may support the lower end portion of the urging member 24 from the radially inner side.

[0131] In the first embodiment, the radial support portion 63b as the second support portion supports the upper end portion of the urging member 24 from the radial inner side, but the present invention is not limited to this configuration. The second support portion may support the upper end portion of the urging member 24 from the radial outer side.

[0132] (Second embodiment) Figure 10 The second embodiment involves Figure 6 Corresponding enlarged cross-sectional view.

[0133] like Figure 10 As shown, the control valve 5 of the present embodiment includes a first urging member 200 provided inside the rotating body 23 and a second urging member 202 provided in the housing body 31 .

[0134] The first force applying member 200 is, for example, a ferromagnetic material such as iron (one member). In the illustrated example, the first force applying member 200 is formed in an annular shape coaxial with the central axis O1. The first force applying member 200 is positioned on the valve bottom wall 91 with the large cylindrical portion 86c inserted therein. The first force applying member 200 is disposed within the interior of the rotating body 23 (the internal space K1). Alternatively, the first force applying member 200 may be embedded within the rotating body 23 by insert molding or the like.

[0135] The second force member 202 is, for example, a permanent magnet (another component). The second force member 202 is housed in an annular space K2 surrounded by the retreat surface 51 and the transition surface 52 in the housing body 31. The second force member 202 and the first force member 200 are axially opposed to each other with the valve bottom wall 91 sandwiched therebetween. The first force member 200 is pulled closer by the magnetic attraction generated between it and the second force member 202, thereby applying force to the rotating body 23 downward. As a result, the sliding wall 92 is pressed against the support surface 53 by the force (magnetic attraction) generated between the first force member 200 and the second force member 202. The second force member 202 can also be embedded in the housing body 31 by insert molding or the like. The first force member 200 and the second force member 202 can be arranged at any position as long as the magnetic attraction is generated.

[0136] In the control valve 5 of this embodiment, the valve body 81 is pressed against the support surface 53 by the urging force generated between the first urging member 200 and the second urging member 202 , thereby ensuring sealing between the outer peripheral surface of the valve body 81 and the support surface 53 .

[0137] Furthermore, the urging member does not cross the inner space K1 of the rotating body 23 in the axial direction, and thus the pressure loss in the inner space K1 can be reduced.

[0138] In the second embodiment, the first urging member 200 is a ferromagnetic body and the second urging member 202 is a permanent magnet. However, the present invention is not limited to this configuration. The first urging member 200 may be a permanent magnet and the second urging member 202 may be a ferromagnetic body.

[0139] In the second embodiment, the valve body 81 is urged toward the support surface 53 by the magnetic attraction between the first urging member 200 and the second urging member 202. However, the present invention is not limited to this configuration. For example, the first urging member 200 and the second urging member 202 may both be permanent magnets, and the valve body 81 may be urged toward the support surface 53 by the repulsive force generated between the first urging member 200 and the second urging member 202.

[0140] (Other variations) While preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to these embodiments. Additions, omissions, substitutions, and other modifications may be made without departing from the spirit of the present disclosure. The present disclosure is not limited by the above description but only by the appended claims.

[0141] For example, in the above-described embodiment, the control valve 5 is described as being mounted on the cooling system 1 of the vehicle. However, the present invention is not limited to this configuration and may be mounted on other systems.

[0142] In the above embodiment, the configuration including two outflow ports 53a and 53b has been described, but the present invention is not limited to this configuration.

[0143] In the above embodiment, the outflow ports 34 and 35 are integrally formed with the base portion 33 , but the present invention is not limited to this configuration. The outflow ports 34 and 35 may be formed separately from the base portion 33 .

[0144] In the above embodiment, the inlet 65 is described as being always connected to the internal space K1, but the invention is not limited to this configuration. The inlet 65 may also be configured to switch between connection and disconnection with the internal space K1 in accordance with the rotation of the rotating body 23. The control valve involved in the present disclosure only needs to be configured such that at least one of the inlet and outlet switches between connection and disconnection with the internal space via a communication port formed in the valve body in accordance with the rotational position of the valve body.

[0145] In the above embodiment, the valve body 81 is described as extending linearly in cross-sectional view, but the present invention is not limited to this configuration. The valve body 81 may also be extended in an arc shape in cross-sectional view.

[0146] In the above embodiment, the biasing member 24 is provided in the internal space K1, but the present invention is not limited to this configuration. The position of the biasing member can be changed as long as it presses the valve body 81 toward the support surface 53. The biasing member is not an essential configuration.

[0147] In the above embodiment, the inlet 65 is formed in the cover 32, but the present invention is not limited to this configuration. The inlet may be formed in the housing body 31. The number of inlets is not limited to one, but may be multiple.

[0148] In the above embodiment, the inflow port 64 is described as extending radially (in the second direction) while bulging upward from the opposing wall 61 , but the present invention is not limited to this configuration. The inflow port 64 may extend only axially from the opposing wall 61 .

[0149] In the above embodiment, the first flow path in the inflow port 64 is described as the branch flow path 71 , but the present invention is not limited to this configuration. The shape of the first flow path can be changed as appropriate as long as it communicates with the inflow port 65 .

[0150] In the above embodiment, the first flow path (branch flow path 71 ) is described as communicating with the inlet 65 over its entire length, but the present invention is not limited to this configuration. The first flow path only needs to communicate with the inlet 65 at least partially in the extending direction.

[0151] In the above embodiment, the structure in which the concave portion 84 or the recessed portions 80a1, 85a are formed in the shaft portion 80 is described, but the present invention is not limited to this structure. The concave portion 84 or the recessed portions 80a1, 85a are not necessarily structures. For example, Figure 11 As shown, ribs 220 or the like that bridge the inner peripheral surfaces of the peripheral wall portions 86 in the radial direction may be provided in the recessed portion 84 .

[0152] In the above embodiment, the urging member 24 is interposed between the valve bottom wall 91 and the opposing wall 61 (axial support portion 63 a ), but the present invention is not limited to this configuration. The urging member 24 may be supported by the sliding wall 92 or the shaft portion 80 , for example.

[0153] Furthermore, within the scope not departing from the gist of the present disclosure, components in the above-described embodiments may be appropriately replaced with known components, and the above-described modifications may be appropriately combined.

[0154] Explanation of symbols 5: Control valve 21: Shell 23: Rotating body 24: Force applying member (first force applying member) 45: Through hole 46: Sealing ring 53: Support surface 53a: Outlet No. 1 (outlet) 53b: Second outflow port (outflow port) 61: Opposite wall 63b: Radial support portion (second support portion) 65: Inlet 80: shaft 80a: Connecting part 80b: Transmission 81: Valve body 84: Concave 91: Valve bottom wall 92: Sliding Wall 92a: Communication port 200: First force-applying component 202: Second force-applying component K1: Interior space.

Claims

1. A control valve comprising: a housing having an inlet for inflow of fluid from the outside and an outlet for outflow of fluid to the outside; and The rotating body includes a shaft portion and a valve body, wherein the shaft portion is located on a first side in the axial direction and is rotatably supported by the housing, and the valve body has an outer diameter that gradually increases as it moves from the shaft portion to a second side in the axial direction and forms an internal space that opens toward the second side in the axial direction. In a state where the rotating body is slidably supported on the support surface formed by the housing on the outer peripheral surface of the valve body, the connection and cutoff between at least one of the inlet and the outlet and the internal space are switched through the communication port formed in the valve body in accordance with the rotational position of the rotating body. A first biasing member is provided inside the rotating body for biasing the rotating body toward a first side in the axial direction.

2. The control valve according to claim 1, wherein: The housing has an opposing wall facing the second axial side opening of the valve body. The first biasing member is a coil spring extending in the axial direction. The first biasing member is interposed between the facing wall and the inner surface of the rotating body through the internal space.

3. The control valve according to claim 2, wherein: The valve body comprises: a valve bottom wall extending from the shaft portion in a radial direction intersecting the axial direction; and a sliding wall connected to the outer peripheral edge of the valve bottom wall and having an outer diameter gradually increasing as it goes toward the second side in the axial direction; The first end portion on the axial side of the first biasing member is supported by the valve bottom wall.

4. The control valve according to claim 3, wherein: The shaft portion includes a first support portion that protrudes further toward the second side in the axial direction than the valve bottom wall and supports a first end portion in the axial direction of the first urging member in a radial direction intersecting the axial direction.

5. The control valve according to any one of claims 2 to 4, wherein: The opposing wall is provided with a second support portion that enters the internal space through the second side opening of the valve body and supports the second axial side end portion of the first urging member in a radial direction intersecting the axial direction.

6. The control valve according to any one of claims 1 to 4, wherein: The shaft portion has a recessed portion formed therein. The recessed portion opens toward the second side in the axial direction and communicates with the internal space.

7. The control valve according to claim 6, wherein: The shaft portion comprises: a transmission portion that passes through the housing in the axial direction via a through hole formed in the housing; and a coupling portion connected to the transmission portion on a first side in the axial direction and coupled to an actuator, A sealing ring is formed between the transmission portion and the inner peripheral surface of the through hole to seal the inside and outside of the housing. The recessed portion is formed at least in the transmission portion.

8. The control valve according to claim 1, wherein The first biasing member is a magnet or a ferromagnetic body capable of being attracted to the magnet. The housing is provided with a second biasing member formed of the other of the magnet and the ferromagnetic body.

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