JP6354321B2 - Control valve - Google Patents

Description

  The present invention relates to a control valve for controlling fluid flow.

  Conventionally, control valves have been used to control fluid flow. Examples of such control valves include those described in Patent Documents 1 and 2, which are cited below.

  Patent Document 1 describes a control valve for a fluid circulation circuit including a body having a fluid inlet and at least two fluid outlets. This control valve rotates an annular seal ring made of a material with a low coefficient of friction to distribute fluid through the fluid outlet.

  Patent Document 2 describes a motor-operated valve that opens and closes a fluid passage and controls the flow of fluid. This motor-operated valve has a valve ball having a through hole in a valve casing having a fluid passage, and an annular valve seat with which the valve ball can come into contact. The valve ball is rotated through the valve shaft. The valve seat is biased in the direction of the valve ball using a bimetal. The bimetal applies an urging force to the valve seat when the valve ball is open or closed, and reduces the urging force to the valve seat while the valve ball is moving to open or close.

JP 2011-021753 A JP-A-4-262179

  If the technique described in Patent Document 1 is used for a cooling passage of an engine mounted on a vehicle, for example, when the engine is in a low rotation state such as idle rotation, the rotation speed of the water pump decreases and the fluid pressure decreases. Therefore, it is conceivable that fluid leaks between the seal ring and the housing. As a result, for example, when the engine is started, the warm-up of the engine is delayed, and the fuel consumption may be deteriorated. Further, in the technique described in Patent Document 2, since the urging force becomes weak while the valve ball is moving to open or close, there is a possibility that the amount of leakage between the seal ring and the housing increases. .

  In view of the above problems, an object of the present invention is to provide a control valve capable of reducing leakage in the housing.

In order to achieve the above object, the control valve according to the present invention includes a cylindrical housing, a pump communication hole provided on one end surface in the axial direction of the housing and communicating with a pump, and an inner peripheral wall of the housing. A first communication hole and a second communication hole provided in the housing, a cylindrical rotor accommodated coaxially with the housing in the housing, and having a spreading characteristic in a diameter-enlarging direction, and an axis of the rotor as a rotation center A rotor rotation mechanism that rotates the rotor along the inner peripheral wall of the housing, and a communication state that is formed in the rotor and that communicates between the first communication hole and a central space radially inward of the rotor according to the rotation of the rotor. a first opening for switching to, is formed in the rotor, and a second opening for switching the communication state between the central space and the second communicating hole in response to rotation of said rotor, before The rotor has an axial opening that extends from one axial end to the other, and the rotor rotation mechanism includes a pair of opening edges that form the axial opening in the rotor. of lies in that by supporting the opening edge portion of the upstream side in the rotation direction Ru rotating the rotor.

With such a characteristic configuration, even when the rotor is rotated and the flow of fluid in the flow path communicating with the first communication hole and the flow path communicating with the second communication hole is controlled, the rotor itself is expanded in the diameter direction. Therefore, the leakage of fluid between the rotor and the housing can be reduced. Further, since it is not necessary to provide another mechanism for giving the rotor a force that expands in the diameter increasing direction, a control valve can be realized at low cost.
Further, with such a configuration, when the rotor is rotated, the rotor rotating mechanism can be pulled from the upstream side in the rotational direction toward the downstream side in the rotational direction with respect to the opening edge on the upstream side in the rotational direction of the rotor. . Therefore, since the force with which the rotor tries to spread with respect to the inner peripheral wall of the housing can be reduced, the rotor can be smoothly rotated.

  In addition, it is preferable that a sliding member that slides along the inner peripheral wall of the housing is provided on the outer peripheral surface of the rotor.

  With such a configuration, the slidability between the rotor and the inner peripheral wall of the housing can be improved, so that wear of the rotor and the housing can be reduced.

  Further, it is preferable that the rotor is constituted by a cylindrical portion having a spreading characteristic in the diameter increasing direction and the sliding member provided in a state of covering an outer peripheral surface of the cylindrical portion.

  With such a configuration, since the cylindrical portion does not slide with respect to the housing, the selection range of the material forming the cylindrical portion is widened. For this reason, since the material of a cylindrical part and a sliding member can be set optimally and a required amount of material can be used as each member, it becomes possible to comprise a control valve efficiently.

  Further, the rotor has a pair of rotor wall portions in which each of the pair of opening edge portions is bent toward the inner side in the radial direction of the rotor, and the rotor rotation mechanism includes the pair of rotor wall portions. A pair of locking portions sandwiched along the circumferential direction from both outer sides of the axial opening, and of the pair of locking portions, the locking portion that locks to the rotor wall portion on the upstream side in the rotational direction It is preferable that the rotor is configured to rotate.

  With such a configuration, when the rotor is rotated, the engagement portion on the upstream side in the rotation direction of the rotor among the pair of engagement portions can be engaged with the rotor wall portion, and the rotor wall portion can be pulled. For this reason, since the force which a rotor tends to spread with respect to the inner peripheral wall of a housing can be made small, a rotor can be rotated smoothly.

  In addition, it is preferable that a portion of the rotor wall portion that is located outside the position where the locking portion is locked is positioned on the downstream side in the rotation direction.

  With such a configuration, the force acting on the rotor wall portion from the locking portion at the position where the locking portion is locked during rotation of the rotor is also a component force in the tangential direction of the rotor wall portion at the locking position. In addition, the upstream portion of the rotor in the rotational direction can be separated from the inner peripheral wall of the housing only during rotation. Therefore, the contact area between the rotor and the housing during the rotation of the rotor is reduced, and the rotor can be easily rotated.

  Further, it is preferable that the rotor rotation mechanism has an intermediate portion that extends radially outward between the pair of locking portions and is positioned between the pair of opening edge portions.

  With such a configuration, the distance between the intermediate portion and each of the pair of locking portions is maintained constant, so that one of the pair of locking portions can only be located from the intermediate portion to the position at which the predetermined distance is reached. It can comprise so that the rotor wall part of a rotation direction upstream may not be pulled. Therefore, the deformation of the rotor wall portion on the upstream side in the rotation direction can be restricted by the intermediate portion, so that excessive deformation of the rotor can be prevented. Further, since the rotor wall portion on the downstream side in the rotation direction can be pushed at the intermediate portion according to the rotation of the rotor, the rotor can be easily rotated.

  Further, the housing is provided in the housing so as to cover the outer circumferences of the first communication hole and the second communication hole in the inner peripheral wall of the housing, and the inner peripheral wall of the housing and the rotor are contacted in a liquid-tight manner. It is preferable that a seal mechanism that is in contact with the first communication hole and the second communication hole to prevent leakage of the fluid is provided.

  With such a configuration, the effect of preventing fluid leakage between the rotor and the housing can be further enhanced.

It is an example of the cooling circuit provided with the control valve which concerns on 1st Embodiment. It is a perspective view of the control valve concerning a 1st embodiment. It is a perspective view of the rotor used in 1st Embodiment. It is a figure which shows the state which extended the rotor shown by FIG. 3 to flat form. It is sectional drawing in the VV line of FIG. It is a figure which shows the modification of a rotor. It is a figure which shows the state which the control valve and rotor which concern on 2nd Embodiment are rotating. It is a figure which shows the state which the control valve and rotor which concern on 3rd Embodiment are rotating. It is a figure which shows a sealing mechanism.

1. First Embodiment A control valve according to the present invention is configured to be able to control fluid flow while reducing fluid leakage in the housing. Hereinafter, the control valve 1 of the present embodiment will be described. FIG. 1 shows an example in which the control valve 1 is employed in a cooling circuit 100 that cools the engine of a vehicle, and FIG. 2 shows a perspective view of the control valve 1.

  The vehicle cooling circuit 100 shown in FIG. 1 has a first path 2 and a second path 3. The first path 2 is a path through which the refrigerant (fluid) from the engine 4 circulates through the radiator 5, and the second path 3 is a path through which the refrigerant from the engine 4 circulates through the heater core 6. In both paths, the refrigerant is circulated by the pump 7. A control valve 1 is provided on the upstream side of the pump 7, and the control valve 1 is configured to allow refrigerant to flow from each of the radiator 5 and the heater core 6.

  As shown in FIG. 2, the control valve 1 includes a housing 10, a pump communication hole 20, a first communication hole 30, a second communication hole 40, a rotor 50, a rotor rotating mechanism 60, a first opening 70, and a second opening. The unit 80 is provided. The housing 10 is configured in a cylindrical shape. In the present embodiment, the housing 10 is configured in a cylindrical shape. Although details will be described later, a pump communication hole 20 is attached to the top surface 11 of the housing 10, and a rotor rotation mechanism 60 is attached to the bottom surface 14. The housing 10 can be configured using a metal, or can be configured using a resin.

  The pump communication hole 20 is provided on one axial end surface of the housing 10 and communicates with the pump 7. One end surface in the axial direction of the housing 10 is one of two surfaces (the top surface 11 and the bottom surface 14) orthogonal to the axial direction of the tube among the surfaces of the cylindrical housing 10. In the example of FIG. 2, the top surface 11 corresponds. As shown in FIG. 1, the pump communication hole 20 is used as the first path 2 and the second path 3 and is connected to the pump 7.

  The first communication hole 30 and the second communication hole 40 are provided in the inner peripheral wall 12 of the housing 10. The inner peripheral wall 12 of the housing 10 is an inner wall parallel to the axial center of the cylindrical housing 10 among the inner walls of the cylindrical housing 10. In the present embodiment, as shown in FIG. 2, the first communication hole 30 and the second communication hole 40 coincide with each other in the circumferential direction of the housing 10 and are provided at different positions in the axial direction. That is, when the housing 10 is viewed from the outside in the axial direction, the first communication hole 30 and the second communication hole 40 overlap in the axial direction, and when the housing 10 is viewed from the outside in the radial direction, the first communication hole is formed. The hole 30 and the second communication hole 40 are provided so as to be separated from each other. For ease of understanding, FIG. 2 will be described on the assumption that the first communication hole 30 is provided on the top surface 11 side and the second communication hole 40 is provided on the bottom surface 14 side.

  The rotor 50 is accommodated in the housing 10 coaxially with the housing 10. The rotor 50 is configured according to the shape of the cylindrical space formed on the radially inner side of the housing 10. The cylindrical space is a space surrounded by the inner peripheral wall 12 of the cylindrical housing 10. In this embodiment, since the housing 10 is formed in a cylindrical shape, the rotor 50 is also formed in a cylindrical shape. Such a rotor 50 is formed, for example, by rolling a plate-like resin of a grade (sliding grade) excellent in slidability such as polytetrafluoroethylene (PTFE) into a cylindrical shape, and the shaft center of the rotor 50 is a housing. The housing 10 is accommodated in the cylindrical space so as to contain the rotor 50 so as to coincide with the axis of the shaft 10.

  Further, the rotor 50 is formed in a cylindrical shape having spreading characteristics in the diameter expanding direction. Such a cylindrical rotor 50 is shown in FIG. The diameter increasing direction refers to a direction in which the inner diameter of the cylindrical rotor 50 increases. For this reason, having the spreading characteristic in the diameter-expanding direction means having the characteristic that the inner diameter of the cylindrical rotor 50 is increased.

  The rotor 50 having such spreading characteristics is preferably configured to have an axial opening 53 that opens from one end in the axial direction to the other end. Opening from one end portion in the axial direction to the other end portion means that the rotor 50 has a gap uniformly along the axial direction. That is, the rotor 50 means that the cross section of the rotor 50 intersecting in the axial direction is formed in a “C shape”. Accordingly, the axial opening 53 is configured to have the same length as the axial length of the rotor 50. Thereby, the rotor 50 which has a spreading | diffusion characteristic can be comprised easily by rounding a plate-shaped material to a cylinder shape.

  A first opening 70 and a second opening 80 are formed in the rotor 50. The first opening 70 switches the first communication hole 30 and the central space 13 to the communication state according to the rotation of the rotor 50, and the second opening 80 changes the second communication hole 40 and the central space according to the rotation of the rotor 50. 13 is switched to the communication state. The first opening 70 corresponds to a hole formed in the rotor 50, and the central space 13 corresponds to a space inside the rotor 50 in the radial direction. The first opening 70 switches the first communication hole 30 and the central space 13 to the communication state or the blocking state according to the rotation of the rotor 50. The second opening 80 corresponds to a hole formed in the rotor 50, and switches the second communication hole 40 and the central space 13 to a communication state or a blocking state according to the rotation of the rotor 50.

  In the present embodiment, the first opening 70 and the second opening 80 are configured so that three states can be set. FIG. 4 shows a state in which the rotor 50 is flattened so that the three states can be easily understood. The three states are the state A in which the first communication hole 30 and the central space 13 are in communication with each other, the state A in which the second communication hole 40 and the central space 13 are in communication, and the first communication hole 30 and the central space 13. Are closed, and the second communication hole 40 and the central space 13 are in communication with each other, the first communication hole 30 and the central space 13 are blocked, and the second communication hole 40 and the central space 13 are connected. It is configured to be switchable to any one of the state C in which the space 13 is shut off.

  Therefore, as shown in FIG. 4, in the state A, both the first opening 70 and the second opening 80 are opened, and in the state B, only the second opening 80 is opened. In the state C, the first opening 70 and the second opening 80 are not opened. Therefore, the rotor 50 includes a portion where the first opening 70 and the second opening 80 overlap, a portion where only the second opening 80 is provided, and the first opening when the rotor 50 is viewed in the axial direction. And a portion where both the portion 70 and the second opening 80 are not provided. Thereby, it is possible to control the flow of the fluid in each of the first path 2 and the second path 3 by rotating the rotor 50.

  The rotor rotation mechanism 60 rotates the rotor 50 along the inner peripheral wall 12 of the housing 10 with the axis of the rotor 50 as the rotation center. FIG. 5 is a cross-sectional view taken along the line VV in FIG. In the present embodiment, the rotor rotation mechanism 60 includes a rotor support portion 61 and a motor 62. The rotor support portion 61 supports the rotor 50. In the present embodiment, the rotor support portion 61 described above supports a portion of the rotor 50 that faces the axial opening 53. The motor 62 rotates the rotor support portion 61 about the axis of the rotor 50 as the rotation center. Further, as described above, the rotor 50 is provided coaxially with the housing 10 and has a characteristic of spreading in the diameter increasing direction. Accordingly, the rotor 50 causes the outer peripheral surface of the rotor 50 to slide and rotate on the inner peripheral wall 12 of the housing 10 by the rotor rotating mechanism 60.

  Here, in the present embodiment, a sliding member 51 that slides along the inner peripheral wall 12 of the housing 10 is provided on the outer peripheral surface of the rotor 50. The sliding member 51 corresponds to a grade (sliding grade) resin having excellent sliding properties such as polytetrafluoroethylene (PTFE) as described above. Of course, other materials having excellent slidability can be used. Thereby, since the slidability between the rotor 50 and the inner peripheral wall 12 of the housing 10 can be improved, wear of the rotor 50 and the housing 10 can be suppressed.

  It is also possible to form the rotor 50 itself with the sliding member 51 as shown in FIG. 3, and as shown in FIG. 6, the cylindrical portion 52 having the characteristic of spreading the rotor 50 in the diameter increasing direction. And a sliding layer 51 provided in a state of covering the outer peripheral surface of the cylindrical portion 52. When the rotor 50 is configured in a two-layer structure, the cylindrical portion 52 does not slide on the inner peripheral wall 12 of the housing 10, so that the selection range of the material forming the cylindrical portion 52 can be expanded. For this reason, the material of the cylindrical part 52 and the sliding member 51 can be set optimally, and since a required amount of material can be used as each member, the control valve 1 can be configured efficiently. Become.

2. Second Embodiment Next, a second embodiment of the control valve 1 will be described. In the first embodiment, the rotor rotation mechanism 60 has been described as supporting the portion of the rotor 50 that faces the axial opening 53. In the present embodiment, the rotor rotation mechanism 60 is different from the first embodiment in that the rotor rotation mechanism 60 supports the opening edge 54 that forms the axial opening 53. Since other configurations are the same as those in the first embodiment, the following description will focus on the different parts.

  FIG. 7 schematically shows the configuration of the rotor rotation mechanism 60 according to this embodiment. FIG. 7A corresponds to a cross-sectional view of the control valve 1 orthogonal to the axial direction of the rotor 50. The rotor rotating mechanism 60 according to the present embodiment rotates the rotor 50 by supporting the upstream opening edge 54 in the rotation direction among the pair of opening edges 54 that form the axial opening 53 in the rotor 50. . The pair of opening edge portions 54 forming the axial opening 53 in the rotor 50 are a part of the rotor 50 positioned so as to sandwich the axial opening 53 from both outer sides of the opening.

  In the example of FIG. 7, each of the pair of opening edge portions 54 is bent toward the radially inner side of the rotor 50 to form a pair of rotor wall portions 55. The pair of opening edges 54 are bent toward the inside in the radial direction over the axial direction of the rotor 50. Therefore, the rotor wall 55 is formed across the axial direction of the rotor 50.

  The rotor rotation mechanism 60 includes a rotor support portion 61 and a motor 62, as in the first embodiment. The rotor support portion 61 included in the rotor rotation mechanism 60 has a radially outer portion formed in a U-shaped cross section along the axial direction, and the pair of opening edge portions 54 from the outer sides of the axial opening 53 in the circumferential direction. It is provided with a pair of locking parts 63 sandwiched along.

  Thereby, for example, when the motor 62 rotates the rotor 50 counterclockwise, as shown in FIG. 7B, the rotor wall on the upstream side in the rotation direction of the rotor 50 among the pair of locking portions 63. The engaging portion 63 that engages with the portion 55 out of the pair of rotor wall portions 55 of the rotor 50 upstream of the rotor wall portion 55 on the upstream side in the rotational direction of the rotor 50 (left side in FIG. 7B) in the rotational direction. It can be pulled from the side toward the downstream side. Therefore, since the force that the rotor 50 tries to spread against the inner peripheral wall 12 of the housing 10 can be reduced, the rotor 50 can be smoothly rotated.

  On the other hand, when the motor 62 rotates the rotor 50 clockwise, as shown in FIG. 7C, the rotor wall portion 55 on the upstream side in the rotation direction of the rotor 50 of the pair of locking portions 63 is provided. Of the pair of rotor wall portions 55 of the rotor 50, the engaging portion 63 to be engaged is located downstream of the rotor wall portion 55 on the upstream side in the rotational direction of the rotor 50 (right side in FIG. 7C) from the upstream side in the rotational direction. Can be pulled to the side. Therefore, since the force that the rotor 50 tries to spread against the inner peripheral wall 12 of the housing 10 can be reduced, the rotor 50 can be smoothly rotated.

3. Third Embodiment Next, a third embodiment of the control valve 1 will be described. In the second embodiment, the rotor 50 has been described as having a pair of rotor wall portions 55 in which each of the pair of opening edge portions 54 is bent toward the radially inner side of the rotor 50. In particular, in the present embodiment, the rotor wall 55 is processed on the rotor wall 55 so that the rotor 50 can easily rotate.

FIG. 8 is a diagram schematically showing the configuration of the rotor rotation mechanism 60 according to the present embodiment.
FIG. 8A corresponds to a cross-sectional view of the control valve 1 orthogonal to the axial direction of the rotor 50. The rotor wall portion 55 according to the present embodiment has a diameter larger than the position (hereinafter referred to as the locking position K (see FIGS. 8B and 8C)) where the locking portion 63 of the rotor wall portion 55 is locked. The portion located outside is configured to be located on the downstream side in the rotation direction of the rotor 50. The locking position K at which the locking part 63 is locked corresponds to a position where the locking part 63 on the upstream side in the rotation direction and the rotor wall 55 abut when the rotor 50 is rotated. In the state before the rotor 50 is rotated, as shown in FIG. 8A, the locking portion 63 and the rotor wall portion 55 do not have to be in contact with each other. FIG. 8B shows an example in which the rotor 50 is rotated counterclockwise, and FIG. 8C shows an example in which the rotor 50 is rotated clockwise.

  The portion located outside the diameter from the locking position K refers to a portion outside the locking position K in the radial direction of the rotor 50. As shown in FIG. 8, the pair of rotor wall portions 55 faces inward in the radial direction in advance so that a portion radially outside the locking position K is located downstream in the rotational direction when the rotor 50 rotates. The opening width is gradually increased.

  The rotor rotating mechanism 60 has an intermediate portion 64 that extends radially outward between the pair of locking portions 63 and is positioned between the pair of opening edge portions 54. In the present embodiment, the intermediate portion 64 extends radially outward from the center of the pair of locking portions 63.

  Thereby, the force acting on the rotor wall portion 55 from the locking portion 63 at the locking position K during rotation of the rotor 50 is also divided in the tangential direction of the rotor wall portion 55 at the locking position K. For example, when the motor 62 rotates the rotor 50 counterclockwise, as shown in FIG. 8 (b), a locking portion 63 that locks to the rotor wall portion 55 on the upstream side in the rotation direction of the rotor 50 is provided. The portion upstream of the rotor 50 in the rotational direction (left side in FIG. 8B) can be separated from the inner peripheral wall 12 of the housing 10. Therefore, the contact area between the rotor 50 and the housing 10 during the rotation of the rotor 50 is reduced, so that the rotor 50 can be easily rotated. On the other hand, when the motor 62 rotates the rotor 50 clockwise, as shown in FIG. 8C, a locking portion 63 that locks to the rotor wall 55 on the upstream side in the rotation direction of the rotor 50 is provided. The portion upstream of the rotor 50 in the rotational direction (the right side in FIG. 8C) can be separated from the inner peripheral wall 12 of the housing 10. Therefore, the contact area between the rotor 50 and the housing 10 during the rotation of the rotor 50 is reduced, so that the rotor 50 can be easily rotated.

Further, by providing the intermediate portion 64, the distance between the intermediate portion 64 and each of the pair of locking portions 63 is maintained constant, so that one of the pair of locking portions 63 is spaced from the intermediate portion 64 at a constant interval. The rotor wall 55 on the upstream side in the rotational direction can be pulled only to the position where
For this reason, since deformation of the rotor wall 55 on the upstream side in the rotation direction can be restricted by the intermediate portion 64, excessive deformation of the rotor 50 can be prevented.

  Further, as shown in FIGS. 8B and 8C, the locking portion 63 on the upstream side in the rotation direction of the rotor 50 pushes the rotor wall portion 55, and the intermediate portion 64 is on the downstream side in the rotation direction of the rotor 50. By pushing the rotor wall portion 55, the rotor 50 can be easily rotated. If the position where the intermediate portion 64 contacts the rotor wall portion 55 is radially outward from the locking position K, the rotational force acting on the downstream rotor wall portion 55 is exerted by the intermediate portion 64. Since the force acting on the outside in the radial direction can be increased, the rotor 50 can be further easily rotated.

4). Other Embodiments In the above embodiment, the rotor 50 has been described as sliding along the inner peripheral wall 12 of the housing 10. For example, a seal mechanism 90 can be provided between the rotor 50 and the housing 10. The seal mechanism 90 is provided in the housing 10 so as to cover the outer periphery of each of the first communication hole 30 and the second communication hole 40 in the inner peripheral wall 12 of the housing 10. The seal mechanism 90 is provided on each of the inner peripheral wall 12 of the housing 10 and the rotor 50. It is provided in liquid-tight contact.

  FIG. 9 shows such a sealing mechanism 90. As shown in FIG. 9, the seal mechanism 90 is provided between the rotor 50 and the housing 10 at the outer peripheral portion of the first communication hole 30. Although not shown, the seal mechanism 90 is also provided between the rotor 50 and the housing 10 at the outer peripheral portion of the second communication hole 40. Therefore, each of the sealing mechanisms 90 is formed in an arc shape along the inner peripheral wall 12 of the housing 10 on the radially outer surface, and formed in an arc shape along the outer peripheral surface of the rotor 50. The The seal mechanism 90 may be made of a sealable material that can provide a fluid-tight seal between the rotor 50 and the housing 10. Thereby, it becomes possible to prevent the fluid flowing through the first communication hole 30 and the second communication hole 40 from leaking. In the case where the seal mechanism 90 is provided, a predetermined gap may be provided between the housing 10 and the rotor 50, or the gap may not be provided.

  In the above embodiment, the rotor 50 has been described as having the axial opening 53 that opens from one axial end to the other, but the rotor 50 is configured without the axial opening 53. It is also possible to do.

  In the third embodiment, the rotor rotation mechanism 60 has an intermediate portion 64 extending radially outward between the pair of locking portions 63 and positioned between the pair of opening edge portions 54. Although described, the rotor rotating mechanism 60 can be configured without the intermediate portion 64.

  In the above embodiment, the first communication hole 30 and the second communication hole 40 coincide with each other in the circumferential direction of the housing 10 and are provided at different positions in the axial direction. However, the first communication hole 30 and the second communication hole are provided. 40 and the housing 10 may be provided at different positions in the circumferential direction and the axial direction.

  In the above embodiment, the first communication hole 30 is provided on the top surface 11 side and the second communication hole 40 is provided on the bottom surface 14 side. However, the first communication hole 30 is on the bottom surface 14 side. The second communication hole 40 may be provided on the top surface 11 side.

  In the above embodiment, the control valve 1 brings the first communication hole 30 and the central space 13 into communication with each other through the first opening 70 and the second opening 80, and the second communication hole 40 and the central space 13. The state A in which the first communication hole 30 and the central space 13 are blocked, the state B in which the second communication hole 40 and the central space 13 are in communication, and the first communication hole 30 and the center. It has been described that the space 13 is in a blocked state and can be switched to either the state C in which the second communication hole 40 and the central space 13 are blocked. However, it is also possible to be configured to be switchable between two predetermined states. The three states, the first communication hole 30 and the central space 13 are in communication with each other, and the second communication hole 40 and the center are connected. It is also possible to configure so that it can be switched to four states including a state in which the space 13 is shut off.

  In the above embodiment, the control valve 1 has been described on the assumption that fluid flows in via the radiator 5 and the heater core 6. However, the control valve 1 is configured so that the fluid flows from the control valve 1 toward the radiator 5 and the heater core 6. Is also possible.

  The present invention can be used for a control valve for controlling fluid flow.

1: Control valve 7: Pump 10: Housing 12: Inner peripheral wall 13: Central space 20: Pump communication hole 30: First communication hole 40: Second communication hole 50: Rotor 51: Sliding member 52: Cylindrical part 53: Axial opening 54: Opening edge 55: Rotor wall 60: Rotor rotating mechanism 63: Locking portion 64: Intermediate portion 70: First opening 80: Second opening 90: Sealing mechanism K: Locking position ( Locking position)

Claims (7)

A tubular housing;
A pump communication hole provided on one end surface in the axial direction of the housing and communicating with the pump;
A first communication hole and a second communication hole provided in the inner peripheral wall of the housing;
A cylindrical rotor that is accommodated coaxially with the housing in the housing and has a spreading characteristic in the diameter expanding direction;
A rotor rotation mechanism that rotates the rotor along the inner peripheral wall of the housing with the axis of the rotor as a rotation center;
A first opening formed in the rotor and switching the first communication hole and a central space radially inward of the rotor to a communication state in accordance with the rotation of the rotor;
A second opening formed in the rotor and switching the second communication hole and the central space to a communication state in accordance with the rotation of the rotor ;
The rotor has an axial opening that opens from one end in the axial direction to the other end;
The rotor rotation mechanism is a control valve that rotates the rotor by supporting an upstream opening edge in the rotation direction among a pair of opening edges forming the axial opening in the rotor .   The control valve according to claim 1, wherein a sliding member that slides along an inner peripheral wall of the housing is provided on an outer peripheral surface of the rotor.   3. The control valve according to claim 2, wherein the rotor includes a cylindrical portion having spreading characteristics in the diameter-enlarging direction and the sliding member provided in a state of covering an outer peripheral surface of the cylindrical portion. The rotor has a pair of rotor wall portions in which each of the pair of opening edge portions is bent toward the radially inner side of the rotor,
The rotor rotation mechanism includes a pair of locking portions that sandwich the pair of rotor wall portions along the circumferential direction from both outer sides of the axial opening, and upstream of the pair of locking portions in the rotation direction. The control valve according to any one of claims 1 to 3, wherein a locking portion that is locked to the rotor wall portion is configured to rotate the rotor. The control valve according to claim 4 , wherein a portion of the rotor wall portion located outside the diameter from the position where the locking portion is locked is positioned on the downstream side in the rotation direction. Said rotor rotating mechanism extends toward the radially outer side between the pair of locking portions, the control valve according to claim 4 or 5 having an intermediate portion located between each other pair of the opening edge portion . Provided in the housing in a state of covering the outer periphery of each of the first communication hole and the second communication hole in the inner peripheral wall of the housing, in liquid-tight contact with the inner peripheral wall of the housing and the rotor, The control valve according to any one of claims 1 to 6 , further comprising a seal mechanism that prevents leakage of fluid flowing through the first communication hole and the second communication hole.

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