Flow path switching device

Abstract

A flow path switching device (1) is provided with a housing (2) and a valve body section (3) disposed inside the housing. The valve core part comprises a fixed disc (13), a rotating disc (14) laminated on the fixed disc and a rotating shaft (15), the housing, the fixed disc and the rotating disc are respectively provided with a plurality of communication paths (20, 30, 40, 50), and the communication paths are connected along with the rotation of the rotating disc so as to form a fluid flow path. In the flow path, sealing members (17, 18) for suppressing fluid leakage are provided at least between the fixed disk and the rotating disk. A front end portion (15a) of the rotating shaft is provided so as to be able to abut against and engage with the fixed plate, and the fixed plate is configured so that the front end portion of the rotating shaft abuts against and engages with the rotation of the fixed plate, thereby being able to reciprocate in the axial direction.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a flow path switching device that switches the flow path of a fluid in a fluid circuit. Background Art

[0002] Conventionally, as a technique of this kind, for example, there is known a flow path switching device described in the following Patent Document 1. As shown in paragraphs

[0156] to

[0166] and Figure 10 As described, the device includes a housing 71 and a valve core portion 73 disposed within the housing 71. The valve core portion 73 includes a fixed disk 75 and a rotationally driven drive disk 74. The fixed disk 75 is disposed to divide the interior of the housing 71 and has a plurality of communication paths 75a and 75b. The drive disk 74 is formed into a plate-like shape with a size capable of closing the communication paths 75a and 75b.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2022-21966 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] In the device described in Patent Document 1, a sealing member is considered to be provided around the communication paths 75a and 75b between the fixed plate 75 and the drive plate 74. In this case, when the drive plate 74 is rotated to switch the communication paths 75a and 75b, the edges of the communication paths 75a and 75b or the edge of the drive plate 74 may cross the sealing member with high surface pressure, causing sliding wear on the sealing member or causing the sealing member to be caught and removed.

[0008] The disclosed technology has been made in view of the above circumstances, and its object is to prevent the sealing member from sliding and wearing or being caught and falling off when the driving plate rotates in a flow path switching device having a sealing member provided at least between a fixed plate and a driving plate.

[0009] Solutions for solving problems

[0010] (1) In order to achieve the above-mentioned purpose, a technical solution of the technology disclosed in the present application is a flow path switching device, which comprises: a housing; and a valve core part, which is arranged inside the housing, the valve core part including: a fixed disk; a driving disk, which is stacked and arranged on the fixed disk and rotates relative to the fixed disk; and a rotating shaft, which is used to rotate the driving disk, the housing, the fixed disk and the driving disk respectively have a plurality of connecting paths, which are configured to be connected through these connecting paths as the driving disk rotates, thereby forming a flow path for the fluid, and for the flow path, a sealing component is provided at least between the fixed disk and the driving disk to suppress leakage of the fluid, the main purpose of the flow path switching device is that the front end portion of the rotating shaft is configured to abut and engage with the fixed disk, and the fixed disk is configured so that the front end portion of the rotating shaft abuts and engages with the fixed disk as it rotates, so that the fixed disk can reciprocate in the axial direction.

[0011] In the structure of (1) above, the driving disk rotates relative to the fixed disk by the rotation of the rotating shaft. At this time, at least between the fixed disk and the driving disk, at the sealing member, the sliding resistance generated as the driving disk rotates is reduced. That is, according to the structure of (1) above, the front end of the rotating shaft is configured to be able to abut and engage with the fixed disk, and the fixed disk is configured so that the front end of the rotating shaft abuts and engages as it rotates, so that the fixed disk can reciprocate in the axial direction. Therefore, when the driving disk rotates as the rotating shaft rotates, the fixed disk reciprocates in the axial direction, so that the gap between the housing and the driving disk and the gap between the fixed disk and the driving disk are expanded, the surface pressure applied to the sealing member between the housing and the driving disk and between the fixed disk and the driving disk is reduced, and the sliding resistance of each sealing member is reduced.

[0012] (2) In order to achieve the above-mentioned purpose, it is preferred that in the structure of the above-mentioned (1), the front end portion of the rotating shaft includes a shaft protrusion and a shaft recess arranged in the circumferential direction, the fixed disk includes a disk recess and a disk protrusion that can abut and engage with the shaft protrusion and the shaft recess, and the shaft protrusion and the shaft recess as well as the disk recess and the disk protrusion include side surfaces inclined along the circumferential direction.

[0013] According to the structure of (2), based on the effect of the structure of (1), by rotating the rotating shaft, a state in which the shaft protrusion and the disk protrusion are in contact (protrusion-protrusion contact state) and a state in which the shaft protrusion and the shaft recess are engaged with the disk recess and the disk protrusion (protrusion-recess engagement state) can be achieved. In this state, in the protrusion-protrusion contact state, the fixed plate moves in the axial direction, thereby increasing the spacing between the housing and the drive plate and the spacing between the fixed plate and the drive plate, and reducing the surface pressure applied to the sealing member between the housing and the drive plate and between the fixed plate and the drive plate. In contrast, in the protrusion-recess engagement state, the fixed plate moves in the axial direction, thereby returning the spacing between the housing and the drive plate and between the fixed plate and the drive plate to their original state, and the surface pressure applied to the sealing member between the housing and the drive plate and between the fixed plate and the drive plate returns to its original state. When switching between the protrusion-protrusion contact state and the protrusion-recess engagement state, the inclined side surfaces of the shaft protrusion and the shaft recess and the disk recess and the disk protrusion are in contact with each other.

[0014] (3) In order to achieve the above-mentioned purpose, it is preferred that, in the structure of the above-mentioned (2), the top of at least one of the shaft protrusion and the disk protrusion is formed as a flat surface or a convex curved surface, and the bottom of at least one of the disk recess and the shaft recess is formed as a flat surface or a concave curved surface.

[0015] According to the configuration of (3), in addition to the effect of the configuration of (2), when the shaft protrusion is in contact with the disk protrusion, the top of at least one of the shaft protrusion and the disk protrusion is formed as a flat surface or a convexly curved surface. Therefore, when the rotating shaft is rotated from this state, the axial position of the rotating shaft does not change abruptly. Furthermore, because the bottom of at least one of the disk recess and the shaft recess is formed as a flat surface or a concavely curved surface, when the rotating shaft is rotated with the shaft protrusion and the shaft recess engaged with the disk recess and the disk protrusion, the axial position of the rotating shaft does not change abruptly.

[0016] (4) In order to achieve the above-mentioned purpose, it is preferred that in the structure of the above-mentioned (2), the disk concave portion has a V-shaped concave gently inclined surface at its bottom, and has a steep inclined surface that continues from the concave gently inclined surface to the disk convex portion to form a side portion of the disk convex portion, and the shaft convex portion has a V-shaped convex gently inclined surface that matches the concave gently inclined surface at its top, and the side portion of the shaft convex portion that continues from the convex gently inclined surface has a steep inclined surface that matches the steep inclined surface of the side portion of the disk convex portion.

[0017] According to the structure of (4), in addition to the effect of the structure of (2), when the rotating shaft starts rotating from a state where the shaft protrusion of the rotating shaft is engaged with the disk recess of the fixed disk and the convex-gently inclined surface of the shaft protrusion is in contact with the concave-gently inclined surface of the disk recess, the shaft protrusion starts sliding relative to the disk recess in a gently inclined manner, and slides by utilizing the surface contact between the convex-gently inclined surface and the concave-gently inclined surface. Furthermore, as the rotation of the rotating shaft progresses, the disk recess and the shaft protrusion transition from contact between the concave-gently inclined surface and the convex-gently inclined surface to contact between the steeply inclined surfaces, and slide by utilizing the surface contact.

[0018] (5) To achieve the above object, preferably, in any one of the structures (1) to (4) above, the drive plate and the rotating shaft are connected so as to be relatively movable in the rotational direction and the axial direction.

[0019] According to the configuration of (5), in addition to the effects of any one of the configurations (1) to (4), the drive plate and the rotating shaft are connected so as to be relatively movable in the rotational and axial directions. Therefore, when the drive plate rotates and applies surface pressure to the sealing member, the drive plate moves in the rotational and axial directions within the gap between the housing and the fixed plate, and is positioned to achieve a balance with the reaction force of the sealing member.

[0020] (6) In order to achieve the above object, preferably, in the structure of (5), the connection portion between the rotating shaft and the driving plate has a gap in the rotation direction.

[0021] According to the structure of (6), in addition to the effect of the structure of (5), since the connection portion between the rotating shaft and the drive disk has a gap in the rotation direction, when the rotating shaft is rotated, the rotating shaft idles by an amount corresponding to the gap in the connection portion.

[0022] (7) In order to achieve the above-mentioned purpose, it is preferred that, in the structure of the above-mentioned (6), the idling angle of the rotating shaft in the gap when the front end portion of the rotating shaft changes from a state of being engaged with the fixed disk to a state of being in contact with the fixed disk and the switching angle at which the driving disk is rotated in order to switch the flow path are set to the same angle.

[0023] According to the structure of (7), in addition to the effect of the structure of (6), when the front end portion of the rotating shaft transitions from a state of engagement with the fixed disk to a state of contact with the fixed disk, that is, when the fixed disk moves in the axial direction and the intervals between the housing and the drive disk and between the fixed disk and the drive disk are expanded, the idling angle of the rotating shaft and the switching angle of the drive disk when the flow path is switched are set to the same angle. Therefore, by rotating the rotating shaft in opposite directions by the switching angle and the idling angle, the rotational position of the rotating shaft and the rotational position of the drive disk can be returned to their original states.

[0024] (8) In order to achieve the above-mentioned purpose, it is preferred that, in the structure of the above-mentioned (7), the flow path switching device further comprises: a driving unit for rotating and driving the rotating shaft; and a control unit for controlling the driving unit, wherein the control unit controls the driving unit to rotate the rotating shaft, and after switching the flow path in a state where the front end portion of the rotating shaft abuts against the fixed disk, the rotating shaft is rotated in the opposite direction, and the rotation of the rotating shaft is stopped in a state where the front end portion of the rotating shaft is engaged with the fixed disk.

[0025] According to the configuration of (8), in addition to the function of the configuration of (7), the control unit controls the driving unit to rotate the rotating shaft, switches the flow path with the front end of the rotating shaft abutting against the fixed disk (enlarging the gap between the housing and the drive disk and the gap between the fixed disk and the drive disk), and then rotates the rotating shaft in the opposite direction. The rotation of the rotating shaft stops with the front end of the rotating shaft engaging with the fixed disk (restoring the gap between the housing and the drive disk and the gap between the fixed disk and the drive disk). Thus, after switching the flow path, the gap between the housing and the drive disk and the gap between the fixed disk and the drive disk can be reliably returned to their original state.

[0026] Effects of the Invention

[0027] According to the configuration of (1) above, when the drive plate rotates, it is possible to suppress the sealing member from sliding and wearing or from being caught and falling off.

[0028] According to the structure of (2), in addition to the effects of the structure of (1), it is possible to smoothly switch between the convex-convex contact state and the convex-concave engagement state.

[0029] According to the configuration of (3), in addition to the effects of the configuration of (2), sliding wear of the sealing member can be further suppressed.

[0030] According to the structure of (4), on the basis of the effect of the structure of (2), when the rotating shaft starts to rotate from the state where the shaft protrusion and the disk recess are engaged, the driving torque required to rotate the rotating shaft can be reduced, and the wear of the shaft protrusion and the disk recess can be suppressed.

[0031] According to the configuration of (5), in addition to the effects of any one of the configurations (1) to (4), the surface pressure applied to the sealing member during rotation of the drive disk can be further reduced, thereby improving the durability of the sealing member.

[0032] According to the structure of (6), in addition to the effect of the structure of (5), even if the rotating shaft rotates, the gap between the housing and the drive disk and the gap between the fixed disk and the drive disk can be set to a state where the gap is widened without rotating the drive disk.

[0033] According to the structure of (7), in addition to the effect of the structure of (6), the switching action of the flow path when the rotating shaft is rotated in one direction and the switching action of the flow path when the rotating shaft is rotated in the opposite direction can be made consistent.

[0034] According to the structure of (8), in addition to the effect of the structure of (7), the sealing performance of the sealing member can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a perspective view showing the flow path switching device according to the first embodiment.

[0036] Figure 2 This is a front view showing the flow path switching device according to the first embodiment.

[0037] Figure 3 It is a plan view showing the flow path switching device according to the first embodiment.

[0038] Figure 4 It is a bottom view showing the flow path switching device according to the first embodiment.

[0039] Figure 5 It is an exploded perspective view showing the flow path switching device according to the first embodiment.

[0040] Figure 6 This is a flow path switching device according to the first embodiment. Figure 3 AA line section view.

[0041] Figure 7 It is a top view showing the rotating disk according to the first embodiment.

[0042] Figure 8 It is an exploded perspective view showing the upper housing and the rotating shaft according to the first embodiment.

[0043] Figure 9 It is a perspective view showing the fixed plate according to the first embodiment.

[0044] Figure 10 This shows the first embodiment. Figure 9 An enlarged view of the engaged structure of the fixed plate is shown.

[0045] Figure 11 This is a front view showing the rotation shaft of the first embodiment.

[0046] Figure 12 This shows the first embodiment. Figure 11 A three-dimensional view of the portion of the engaging structure surrounded by a dot-dash circle.

[0047] Figure 13This is a cross-sectional view schematically showing the upper housing, the rotating disk, the fixed disk, the rotating shaft, and the like according to the first embodiment in a state before operation.

[0048] Figure 14 The rotating disk and the rotating shaft of the first embodiment are shown. Figure 13 BB line cross-sectional view.

[0049] Figure 15 This is a cross-sectional view schematically showing an operation start state of the upper housing, the rotating disk, the fixed disk, the rotating shaft, and the like in which only the rotating shaft rotates according to the first embodiment.

[0050] Figure 16 The rotating disk and the rotating shaft of the first embodiment are shown. Figure 15 CC line cross-sectional view.

[0051] Figure 17 This is a cross-sectional view schematically showing the operating state of the upper housing, the rotating disk, the fixed disk, the rotating shaft, etc., in which the rotating disk of the first embodiment is rotating.

[0052] Figure 18 The rotating disk and the rotating shaft of the first embodiment are shown. Figure 17 DD line cross-sectional view.

[0053] Figure 19 This is a schematic cross-sectional view showing a state in which the upper housing, the rotating disk, the fixed disk, the rotating shaft, and the like of the first embodiment have completed their operation, with the rotating shaft and the rotating disk further rotating.

[0054] Figure 20 The rotating disk and the rotating shaft of the first embodiment are shown. Figure 19 EE line cross-sectional view.

[0055] Figure 21 It is a plan view showing a state in which an upper case and a driving portion are removed from the flow path switching device according to the second embodiment.

[0056] Figure 22 The second embodiment is shown in an enlarged manner. Figure 21 A top view of the through hole and the rotation axis (the portion surrounded by the dotted line).

[0057] Figure 23 It is a perspective view showing a rotation shaft according to the second embodiment.

[0058] Figure 24 The second embodiment is shown in an enlarged manner. Figure 23 A perspective view of the engagement structure at the front end portion of the rotating shaft is shown.

[0059] Figure 25 It is a plan view showing a fixed plate according to a second embodiment.

[0060] Figure 26 The second embodiment is shown in an enlarged manner. Figure 25 A perspective view of the engaged structure of the fixed plate is shown.

[0061] Figure 27A This is a schematic diagram showing the engagement relationship between the through-holes of the rotating disk and the rotating shaft in the “initial state” of the flow path switching device according to the second embodiment.

[0062] Figure 27B This is a schematic diagram showing changes in the lift of the rotation shaft relative to the rotation shaft angle in the “initial state” of the flow path switching device according to the second embodiment.

[0063] Figure 27C It is a plan view showing the positional relationship between the through-hole and the rotational position of the rotating shaft, the disk protrusion, and the disk recess and the shaft protrusion in the “initial state” of the flow path switching device according to the second embodiment.

[0064] Figure 27D The figure shows the rotation positions of the rotating disk and the rotating communication path in the "initial state" of the flow path switching device of the second embodiment. Figure 21 The top view of the base.

[0065] Figure 28A The second embodiment of the flow path switching device is in the "45° rotation state". Figure 27A Schematic diagram for the reference.

[0066] Figure 28B The second embodiment of the flow path switching device is in the "45° rotation state". Figure 27B Schematic diagram for the reference.

[0067] Figure 28C The second embodiment of the flow path switching device is in the "45° rotation state". Figure 27C The top view of the base.

[0068] Figure 28D The second embodiment of the flow path switching device is in the "45° rotation state". Figure 27D The top view of the base.

[0069] Figure 29A The second embodiment of the flow path switching device is in the "90° rotation state". Figure 27A Schematic diagram for the reference.

[0070] Figure 29B The second embodiment is a "90° rotation state" of the flow path switching device. Figure 27B Schematic diagram for the reference.

[0071] Figure 29CThe second embodiment is a "90° rotation state" of the flow path switching device. Figure 27C The top view of the base.

[0072] Figure 29D The second embodiment is a "90° rotation state" of the flow path switching device. Figure 27D The top view of the base.

[0073] Figure 30A The second embodiment of the flow path switching device is in the "135° rotation state". Figure 27A Schematic diagram for the reference.

[0074] Figure 30B The second embodiment of the flow path switching device is in the "135° rotation state". Figure 27B Schematic diagram of .

[0075] Figure 30C The second embodiment of the flow path switching device is in the "135° rotation state". Figure 27C The top view of the base.

[0076] Figure 30D The second embodiment of the flow path switching device is in the "135° rotation state". Figure 27D The top view of the base.

[0077] Figure 31A The flow path switching device of the second embodiment is "returned to the 90° rotation state" Figure 27A Schematic diagram for the reference.

[0078] Figure 31B The flow path switching device of the second embodiment is "returned to the 90° rotation state" Figure 27B Schematic diagram for the reference.

[0079] Figure 31C The flow path switching device of the second embodiment is "returned to the 90° rotation state" Figure 27C The top view of the base.

[0080] Figure 31D The flow path switching device of the second embodiment is "returned to the 90° rotation state" Figure 27D The top view of the base.

[0081] Figure 32A The second embodiment of the flow path switching device is in the "135° rotation state again". Figure 27A Schematic diagram for the reference.

[0082] Figure 32B The second embodiment of the flow path switching device is in the "135° rotation state again". Figure 27BSchematic diagram for the reference.

[0083] Figure 32C The second embodiment of the flow path switching device is in the "135° rotation state again". Figure 27C The top view of the base.

[0084] Figure 32D The second embodiment of the flow path switching device is in the "135° rotation state again". Figure 27D The top view of the base.

[0085] Figure 33A The second embodiment of the flow path switching device is in the "180° rotation state". Figure 27A Schematic diagram for the reference.

[0086] Figure 33B The second embodiment of the flow path switching device is in the "180° rotation state". Figure 27B Schematic diagram for the reference.

[0087] Figure 33C The second embodiment of the flow path switching device is in the "180° rotation state". Figure 27C The top view of the base.

[0088] Figure 33D The second embodiment of the flow path switching device is in the "180° rotation state". Figure 27D The top view of the base.

[0089] Figure 34A The flow path switching device of the second embodiment "returns to the 135° rotation state" is Figure 27A Schematic diagram for the reference.

[0090] Figure 34B The flow path switching device of the second embodiment "returns to the 135° rotation state" is Figure 27B Schematic diagram for the reference.

[0091] Figure 34C The flow path switching device of the second embodiment "returns to the 135° rotation state" is Figure 27C The top view of the base.

[0092] Figure 34D The flow path switching device of the second embodiment "returns to the 135° rotation state" is Figure 27D The top view of the base.

[0093] Figure 35A The flow path switching device of the second embodiment is "returned to the 90° rotation state" Figure 27A Schematic diagram for the reference.

[0094] Figure 35B The flow path switching device of the second embodiment is "returned to the 90° rotation state" Figure 27B Schematic diagram for the reference.

[0095] Figure 35C The flow path switching device of the second embodiment is "returned to the 90° rotation state" Figure 27C The top view of the base.

[0096] Figure 35D The flow path switching device of the second embodiment is "returned to the 90° rotation state" Figure 27D The top view of the base.

[0097] Figure 36A The second embodiment is a flow path switching device "returning to the 45° rotation state" Figure 27A Schematic diagram for the reference.

[0098] Figure 36B The flow path switching device of the second embodiment is "returned to the 45° rotation state" Figure 27B Schematic diagram for the reference.

[0099] Figure 36C The flow path switching device of the second embodiment is "returned to the 45° rotation state" Figure 27C The top view of the base.

[0100] Figure 36D The flow path switching device of the second embodiment is "returned to the 45° rotation state" Figure 27D The top view of the base.

[0101] Figure 37A The second embodiment of the flow path switching device is in the "90° rotation state again". Figure 27A Schematic diagram for the reference.

[0102] Figure 37B The second embodiment of the flow path switching device is in the "90° rotation state again". Figure 27B Schematic diagram for the reference.

[0103] Figure 37C The second embodiment of the flow path switching device is in the "90° rotation state again". Figure 27C The top view of the base.

[0104] Figure 37D The second embodiment of the flow path switching device is in the "90° rotation state again". Figure 27D The top view of the base.

[0105] Figure 38AThe flow path switching device of the second embodiment is "returned to the 45° rotation state" Figure 27A Schematic diagram for the reference.

[0106] Figure 38B The flow path switching device of the second embodiment is "returned to the 45° rotation state" Figure 27B Schematic diagram for the reference.

[0107] Figure 38C The flow path switching device of the second embodiment is "returned to the 45° rotation state" Figure 27C The top view of the base.

[0108] Figure 38D The flow path switching device of the second embodiment is "returned to the 45° rotation state" Figure 27D The top view of the base.

[0109] Figure 39A The flow path switching device of the second embodiment "returns to the initial state" Figure 27A Schematic diagram for the reference.

[0110] Figure 39B The flow path switching device of the second embodiment "returns to the initial state" Figure 27B Schematic diagram for the reference.

[0111] Figure 39C The flow path switching device of the second embodiment "returns to the initial state" Figure 27C The top view of the base.

[0112] Figure 39D The flow path switching device of the second embodiment "returns to the initial state" Figure 27D The top view of the base.

[0113] Figure 40A The "initial state" of the flow path switching device of the third embodiment is Figure 27A Schematic diagram for the reference.

[0114] Figure 40B The "initial state" of the flow path switching device of the third embodiment is Figure 27B Schematic diagram for the reference.

[0115] Figure 40C The "initial state" of the flow path switching device of the third embodiment is Figure 27D The top view of the base.

[0116] Figure 41A The flow path switching device of the third embodiment is in the "45° rotation state". Figure 40A The schematic diagram shall prevail.

[0117] Figure 41B The flow path switching device of the third embodiment is in the "45° rotation state". Figure 40B The schematic diagram shall prevail.

[0118] Figure 41C The flow path switching device of the third embodiment is in the "45° rotation state". Figure 40C The top view of the base.

[0119] Figure 42A The "90° rotation state" of the flow path switching device of the third embodiment is Figure 41A Schematic diagram for the reference.

[0120] Figure 42B The "90° rotation state" of the flow path switching device of the third embodiment is Figure 41B The schematic diagram shall prevail.

[0121] Figure 42C The "90° rotation state" of the flow path switching device of the third embodiment is Figure 41C The top view of the base.

[0122] Figure 43A The flow path switching device of the third embodiment is "returned to the 45° rotation state" Figure 41A Schematic diagram for the reference.

[0123] Figure 43B The flow path switching device of the third embodiment is "returned to the 45° rotation state" Figure 41B The schematic diagram shall prevail.

[0124] Figure 43C The flow path switching device of the third embodiment is "returned to the 45° rotation state" Figure 41C The top view of the base.

[0125] Figure 44A The flow path switching device of the third embodiment "returns to the initial state" Figure 41A Schematic diagram for the reference.

[0126] Figure 44B The flow path switching device of the third embodiment "returns to the initial state" Figure 41B Schematic diagram for the reference.

[0127] Figure 44C The flow path switching device of the third embodiment "returns to the initial state" Figure 41C The top view of the base.

[0128] Figure 45A The "initial state" of the flow path switching device of the fourth embodiment is Figure 40A The schematic diagram shall prevail.

[0129] Figure 45B The "initial state" of the flow path switching device of the fourth embodiment is Figure 40B Schematic diagram for the reference.

[0130] Figure 45C The "initial state" of the flow path switching device of the fourth embodiment is Figure 40C The top view of the base.

[0131] Figure 46A The flow path switching device of the fourth embodiment is in the "22.5° rotation state". Figure 45A Schematic diagram for the reference.

[0132] Figure 46B The flow path switching device of the fourth embodiment is in the "22.5° rotation state". Figure 45B Schematic diagram for the reference.

[0133] Figure 46C The flow path switching device of the fourth embodiment is in the "22.5° rotation state". Figure 45C The top view of the base.

[0134] Figure 47A The "67.5° rotation state" of the flow path switching device of the fourth embodiment is Figure 45A Schematic diagram for the reference.

[0135] Figure 47B The "67.5° rotation state" of the flow path switching device of the fourth embodiment is Figure 45B Schematic diagram for the reference.

[0136] Figure 47C The "67.5° rotation state" of the flow path switching device of the fourth embodiment is Figure 45C The top view of the base.

[0137] Figure 48A The flow path switching device of the fourth embodiment is "returned to the 45° rotation state" Figure 45A Schematic diagram for the reference.

[0138] Figure 48B The flow path switching device of the fourth embodiment is "returned to the 45° rotation state" Figure 45B Schematic diagram for the reference.

[0139] Figure 48C The flow path switching device of the fourth embodiment is "returned to the 45° rotation state" Figure 45C The top view of the base.

[0140] Figure 49A The flow path switching device of the fourth embodiment "returns to the initial state" Figure 45A Schematic diagram for the reference.

[0141] Figure 49B The flow path switching device of the fourth embodiment "returns to the initial state" Figure 45B Schematic diagram for the reference.

[0142] Figure 49C The flow path switching device of the fourth embodiment "returns to the initial state" Figure 45C The top view of the base.

[0143] Figure 50A The "initial state" of the flow path switching device of the fifth embodiment is Figure 40A Schematic diagram for the reference.

[0144] Figure 50B The "initial state" of the flow path switching device of the fifth embodiment is Figure 40B Schematic diagram for the reference.

[0145] Figure 50C The "initial state" of the flow path switching device of the fifth embodiment is Figure 40C The top view of the base.

[0146] Figure 51A The flow path switching device of the fifth embodiment is in the "45° rotation state". Figure 50A The schematic diagram shall prevail.

[0147] Figure 51B The flow path switching device of the fifth embodiment is in the "45° rotation state". Figure 50B Schematic diagram for the reference.

[0148] Figure 51C The flow path switching device of the fifth embodiment is in the "45° rotation state". Figure 50C The top view of the base.

[0149] Figure 52A The "90° rotation state" of the flow path switching device of the fifth embodiment is Figure 50A The schematic diagram shall prevail.

[0150] Figure 52B The "90° rotation state" of the flow path switching device of the fifth embodiment is Figure 50B Schematic diagram for the reference.

[0151] Figure 52C The "90° rotation state" of the flow path switching device of the fifth embodiment is Figure 50C The top view of the base.

[0152] Figure 53A The flow path switching device of the fifth embodiment is in the "135° rotation state". Figure 50A The schematic diagram shall prevail.

[0153] Figure 53B The flow path switching device of the fifth embodiment is in the "135° rotation state". Figure 50B Schematic diagram for the reference.

[0154] Figure 53C The flow path switching device of the fifth embodiment is in the "135° rotation state". Figure 50C The top view of the base.

[0155] Figure 54A The flow path switching device of the fifth embodiment is "returned to the 90° rotation state" Figure 50A Schematic diagram for the reference.

[0156] Figure 54B The flow path switching device of the fifth embodiment is "returned to the 90° rotation state" Figure 50B Schematic diagram for the reference.

[0157] Figure 54C The flow path switching device of the fifth embodiment is "returned to the 90° rotation state" Figure 50C The top view of the base.

[0158] Figure 55A The flow path switching device of the fifth embodiment is "returned to the 45° rotation state" Figure 50A Schematic diagram for the reference.

[0159] Figure 55B The flow path switching device of the fifth embodiment is "returned to the 45° rotation state" Figure 50B Schematic diagram for the reference.

[0160] Figure 55C The flow path switching device of the fifth embodiment is "returned to the 45° rotation state" Figure 50C The top view of the base.

[0161] Figure 56A The flow path switching device of the fifth embodiment is in the "90° rotation state again" Figure 50A The schematic diagram shall prevail.

[0162] Figure 56B The flow path switching device of the fifth embodiment is in the "90° rotation state again" Figure 50B Schematic diagram for the reference.

[0163] Figure 56CThe flow path switching device of the fifth embodiment is in the "90° rotation state again" Figure 50C The top view of the base.

[0164] Figure 57A The flow path switching device of the fifth embodiment is "returned to the 45° rotation state" Figure 50A Schematic diagram for the reference.

[0165] Figure 57B The flow path switching device of the fifth embodiment is "returned to the 45° rotation state" Figure 50B Schematic diagram for the reference.

[0166] Figure 57C The flow path switching device of the fifth embodiment is "returned to the 45° rotation state" Figure 50C The top view of the base.

[0167] Figure 58A The flow path switching device of the fifth embodiment "returns to the initial state" Figure 50A Schematic diagram for the reference.

[0168] Figure 58B The flow path switching device of the fifth embodiment "returns to the initial state" Figure 50B Schematic diagram for the reference.

[0169] Figure 58C The flow path switching device of the fifth embodiment "returns to the initial state" Figure 50C The top view of the base.

[0170] Figure 59 It is a perspective view showing the upper surface side of the flow path switching device according to the sixth embodiment.

[0171] Figure 60 It is a perspective view showing the bottom side of the flow path switching device according to the sixth embodiment.

[0172] Figure 61 It is a plan view showing a flow path switching device according to a sixth embodiment.

[0173] Figure 62 It is a plan view showing a state in which an upper case and a driving portion are removed from the flow path switching device according to the sixth embodiment.

[0174] Figure 63 The sixth embodiment is shown in an enlarged manner. Figure 62 A top view of the through hole and the rotating shaft.

[0175] Figure 64 It is a perspective view showing the rotation shaft of the sixth embodiment.

[0176] Figure 65 The sixth embodiment is shown in an enlarged manner. Figure 64 A perspective view of the engagement structure at the front end portion of the rotating shaft is shown.

[0177] Figure 66 It is a plan view showing a fixed plate according to the sixth embodiment.

[0178] Figure 67 The sixth embodiment is shown in an enlarged manner. Figure 66 A perspective view of the engaged structure of the fixed plate is shown.

[0179] Figure 68A The "initial state" of the flow path switching device of the sixth embodiment is Figure 27A Schematic diagram for the reference.

[0180] Figure 68B The "initial state" of the flow path switching device of the sixth embodiment is Figure 27B Schematic diagram for the reference.

[0181] Figure 68C The "initial state" of the flow path switching device of the sixth embodiment is Figure 27C The top view of the base.

[0182] Figure 68D The "initial state" of the flow path switching device of the sixth embodiment is Figure 27D The top view of the base.

[0183] Figure 69A The "30° rotation state" of the flow path switching device of the sixth embodiment is Figure 68A Schematic diagram for the reference.

[0184] Figure 69B The "30° rotation state" of the flow path switching device of the sixth embodiment is Figure 68B Schematic diagram for the reference.

[0185] Figure 69C The "30° rotation state" of the flow path switching device of the sixth embodiment is Figure 68C The top view of the base.

[0186] Figure 69D The "30° rotation state" of the flow path switching device of the sixth embodiment is Figure 68D The top view of the base.

[0187] Figure 70A The "60° rotation state" of the flow path switching device of the sixth embodiment is Figure 68A Schematic diagram for the reference.

[0188] Figure 70BThe "60° rotation state" of the flow path switching device of the sixth embodiment is Figure 68B Schematic diagram for the reference.

[0189] Figure 70C The "60° rotation state" of the flow path switching device of the sixth embodiment is Figure 68C The top view of the base.

[0190] Figure 70D The "60° rotation state" of the flow path switching device of the sixth embodiment is Figure 68D The top view of the base.

[0191] Figure 71A The flow path switching device of the sixth embodiment is "returned to the 30° rotation state" Figure 68A Schematic diagram for the reference.

[0192] Figure 71B The flow path switching device of the sixth embodiment is "returned to the 30° rotation state" Figure 68B Schematic diagram for the reference.

[0193] Figure 71C The flow path switching device of the sixth embodiment is "returned to the 30° rotation state" Figure 68C The top view of the base.

[0194] Figure 71D The flow path switching device of the sixth embodiment is "returned to the 30° rotation state" Figure 68D The top view of the base.

[0195] Figure 72A The flow path switching device of the sixth embodiment is "returned to the 0° rotation state" Figure 68A Schematic diagram for the reference.

[0196] Figure 72B The flow path switching device of the sixth embodiment is "returned to the 0° rotation state" Figure 68B Schematic diagram for the reference.

[0197] Figure 72C The flow path switching device of the sixth embodiment is "returned to the 0° rotation state" Figure 68C The top view of the base.

[0198] Figure 72D The flow path switching device of the sixth embodiment is "returned to the 0° rotation state" Figure 68D The top view of the base.

[0199] Figure 73A The flow path switching device of the sixth embodiment is in the "30° rotation state again". Figure 68ASchematic diagram for the reference.

[0200] Figure 73B The flow path switching device of the sixth embodiment is in the "30° rotation state again". Figure 68B Schematic diagram for the reference.

[0201] Figure 73C The flow path switching device of the sixth embodiment is in the "30° rotation state again". Figure 68C The top view of the base.

[0202] Figure 73D The flow path switching device of the sixth embodiment is in the "30° rotation state again". Figure 68D The top view of the base.

[0203] Figure 74A The flow path switching device of the sixth embodiment is in the "60° rotation state again". Figure 68A Schematic diagram for the reference.

[0204] Figure 74B The flow path switching device of the sixth embodiment is in the "60° rotation state again". Figure 68B Schematic diagram for the reference.

[0205] Figure 74C The flow path switching device of the sixth embodiment is in the "60° rotation state again". Figure 68C The top view of the base.

[0206] Figure 74D The flow path switching device of the sixth embodiment is in the "60° rotation state again". Figure 68D The top view of the base.

[0207] Figure 75A The "90° rotation state" of the flow path switching device of the sixth embodiment is Figure 68A Schematic diagram for the reference.

[0208] Figure 75B The "90° rotation state" of the flow path switching device of the sixth embodiment is Figure 68B Schematic diagram for the reference.

[0209] Figure 75C The "90° rotation state" of the flow path switching device of the sixth embodiment is Figure 68C The top view of the base.

[0210] Figure 75D The "90° rotation state" of the flow path switching device of the sixth embodiment is Figure 68D The top view of the base.

[0211] Figure 76A The flow path switching device of the sixth embodiment is "returned to the 60° rotation state" Figure 68A Schematic diagram for the reference.

[0212] Figure 76B The flow path switching device of the sixth embodiment is "returned to the 60° rotation state" Figure 68B Schematic diagram for the reference.

[0213] Figure 76C The flow path switching device of the sixth embodiment is "returned to the 60° rotation state" Figure 68C The top view of the base.

[0214] Figure 76D The flow path switching device of the sixth embodiment is "returned to the 60° rotation state" Figure 68D The top view of the base.

[0215] Figure 77A The flow path switching device of the sixth embodiment is "returned to the 30° rotation state" Figure 68A The schematic diagram shall prevail.

[0216] Figure 77B The flow path switching device of the sixth embodiment is "returned to the 30° rotation state" Figure 68B Schematic diagram for the reference.

[0217] Figure 77C The flow path switching device of the sixth embodiment is "returned to the 30° rotation state" Figure 68C The top view of the base.

[0218] Figure 77D The flow path switching device of the sixth embodiment is "returned to the 30° rotation state" Figure 68D The top view of the base.

[0219] Figure 78A The flow path switching device of the sixth embodiment is "returned to the 0° rotation state" Figure 68A Schematic diagram for the reference.

[0220] Figure 78B The flow path switching device of the sixth embodiment is "returned to the 0° rotation state" Figure 68B Schematic diagram for the reference.

[0221] Figure 78C The flow path switching device of the sixth embodiment is "returned to the 0° rotation state" Figure 68C The top view of the base.

[0222] Figure 78DThe flow path switching device of the sixth embodiment is "returned to the 0° rotation state" Figure 68D The top view of the base.

[0223] Figure 79A The flow path switching device of the sixth embodiment is in the "-30° rotation state". Figure 68A Schematic diagram for the reference.

[0224] Figure 79B The flow path switching device of the sixth embodiment is in the "-30° rotation state". Figure 68B Schematic diagram for the reference.

[0225] Figure 79C The flow path switching device of the sixth embodiment is in the "-30° rotation state". Figure 68C The top view of the base.

[0226] Figure 79D The flow path switching device of the sixth embodiment is in the "-30° rotation state". Figure 68D The top view of the base.

[0227] Figure 80A The flow path switching device of the sixth embodiment "returns to the initial state" Figure 68A Schematic diagram for the reference.

[0228] Figure 80B The flow path switching device of the sixth embodiment "returns to the initial state" Figure 68B Schematic diagram for the reference.

[0229] Figure 80C The flow path switching device of the sixth embodiment "returns to the initial state" Figure 68C The top view of the base.

[0230] Figure 80D The flow path switching device of the sixth embodiment "returns to the initial state" Figure 68D The top view of the base.

[0231] Figure 81 This is a flowchart showing an example of the contents of the flow path switching control according to the sixth embodiment.

[0232] Figure 82 This is a flowchart showing an example of the contents of the flow path switching control according to the sixth embodiment.

[0233] Figure 83 This is a flowchart showing an example of the contents of the flow path switching control according to the sixth embodiment.

[0234] Figure 84A The "initial state" of the flow path switching device of the seventh embodiment is Figure 68A Schematic diagram for the reference.

[0235] Figure 84B The "initial state" of the flow path switching device of the seventh embodiment is Figure 68B Schematic diagram for the reference.

[0236] Figure 84C The "initial state" of the flow path switching device of the seventh embodiment is Figure 68D The top view of the base.

[0237] Figure 85A The "30° rotation state" of the flow path switching device of the seventh embodiment is Figure 84A Schematic diagram for the reference.

[0238] Figure 85B The "30° rotation state" of the flow path switching device of the seventh embodiment is Figure 84B Schematic diagram for the reference.

[0239] Figure 85C The "30° rotation state" of the flow path switching device of the seventh embodiment is Figure 84C The top view of the base.

[0240] Figure 86A The "60° rotation state" of the flow path switching device of the seventh embodiment is Figure 84A Schematic diagram for the reference.

[0241] Figure 86B The "60° rotation state" of the flow path switching device of the seventh embodiment is Figure 84B Schematic diagram for the reference.

[0242] Figure 86C The "60° rotation state" of the flow path switching device of the seventh embodiment is Figure 84C The top view of the base.

[0243] Figure 87A The flow path switching device of the seventh embodiment is "returned to the 30° rotation state" Figure 84A The schematic diagram shall prevail.

[0244] Figure 87B The flow path switching device of the seventh embodiment is "returned to the 30° rotation state" Figure 84B Schematic diagram for the reference.

[0245] Figure 87C The flow path switching device of the seventh embodiment is "returned to the 30° rotation state" Figure 84C The top view of the base.

[0246] Figure 88AThe flow path switching device of the seventh embodiment is "returned to the 0° rotation state" Figure 84A The schematic diagram shall prevail.

[0247] Figure 88B The flow path switching device of the seventh embodiment is "returned to the 0° rotation state" Figure 84B Schematic diagram for the reference.

[0248] Figure 88C The flow path switching device of the seventh embodiment is "returned to the 0° rotation state" Figure 84C The top view of the base.

[0249] Figure 89A The "-30° rotation state" of the flow path switching device of the seventh embodiment is Figure 84A Schematic diagram for the reference.

[0250] Figure 89B The "-30° rotation state" of the flow path switching device of the seventh embodiment is Figure 84B Schematic diagram for the reference.

[0251] Figure 89C The "-30° rotation state" of the flow path switching device of the seventh embodiment is Figure 84C The top view of the base.

[0252] Figure 90A The flow path switching device of the seventh embodiment "returns to the initial state" Figure 84A Schematic diagram for the reference.

[0253] Figure 90B The flow path switching device of the seventh embodiment "returns to the initial state" Figure 84B Schematic diagram for the reference.

[0254] Figure 90C The flow path switching device of the seventh embodiment "returns to the initial state" Figure 84C The top view of the base.

[0255] Figure 91A The "initial state" of the flow path switching device of the eighth embodiment is Figure 40A Schematic diagram for the reference.

[0256] Figure 91B It is a schematic diagram showing the relationship between the engaging structure and the engaged structure in the “initial state” of the flow path switching device according to the eighth embodiment.

[0257] Figure 91C The "initial state" of the flow path switching device of the eighth embodiment is the same as Figure 40B Same schematic.

[0258] Figure 92A The "45° rotation state" of the flow path switching device of the eighth embodiment is Figure 91A Schematic diagram for the reference.

[0259] Figure 92B The "45° rotation state" of the flow path switching device of the eighth embodiment is Figure 91B Schematic diagram for the reference.

[0260] Figure 92C The "45° rotation state" of the flow path switching device of the eighth embodiment is Figure 91C The schematic diagram shall prevail.

[0261] Figure 93A The "90° rotation state" of the flow path switching device of the eighth embodiment is Figure 91A Schematic diagram for the reference.

[0262] Figure 93B The "90° rotation state" of the flow path switching device of the eighth embodiment is Figure 91B Schematic diagram for the reference.

[0263] Figure 93C The eighth embodiment is a flow path switching device in a "90° rotation state" Figure 91C The schematic diagram shall prevail.

[0264] Figure 94A The flow path switching device of the eighth embodiment is "returned to the 45° rotation state" Figure 91A Schematic diagram for the reference.

[0265] Figure 94B The flow path switching device of the eighth embodiment is "returned to the 45° rotation state" Figure 91B Schematic diagram for the reference.

[0266] Figure 94C The flow path switching device of the eighth embodiment is "returned to the 45° rotation state" Figure 91C Schematic diagram for the reference.

[0267] Figure 95A The flow path switching device of the eighth embodiment "returns to the initial state" Figure 91A Schematic diagram for the reference.

[0268] Figure 95B The flow path switching device of the eighth embodiment "returns to the initial state" Figure 91B Schematic diagram for the reference.

[0269] Figure 95C The flow path switching device of the eighth embodiment "returns to the initial state" Figure 91C Schematic diagram for the reference.

[0270] Figure 96 This is a schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotating shaft is relatively lowered before the flow path is switched in the ninth embodiment.

[0271] Figure 97 This is a schematic diagram showing the relationship between the engaging structure and the engaged structure in the middle of the relative ascent of the rotating shaft during flow path switching according to the ninth embodiment.

[0272] Figure 98 This is a schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotation shaft is relatively raised during flow path switching according to the ninth embodiment.

[0273] Figure 99 It is a schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotating shaft is relatively lowered before the flow path is switched in a comparative example (eighth embodiment).

[0274] Figure 100 It is a schematic diagram showing the relationship between the engaging structure and the engaged structure in the middle of the relative ascent of the rotating shaft during flow path switching in a comparative example (eighth embodiment).

[0275] Figure 101 It is a schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotation shaft is relatively raised during flow path switching in a comparative example (eighth embodiment).

[0276] Figure 102 This is a graph showing the relationship between changes in the rotation angle of the rotating shaft and changes in the driving torque in the ninth embodiment.

[0277] Figure 103 It is a schematic diagram showing the relationship between the engaging structure and the engaged structure in the relatively descending state before the flow path is switched according to the tenth embodiment.

[0278] Figure 104 The 10th embodiment is shown in an enlarged manner. Figure 103 Schematic diagram of the connecting parts.

[0279] Figure 105 This is a schematic diagram showing the relationship between the engaging structure and the engaged structure at the start of flow path switching (at the start of initial drive for relative ascending) in the tenth embodiment.

[0280] Figure 106 It is a schematic diagram showing the relationship between the engaging structure and the engaged structure in the middle of flow path switching (in the middle of relative ascending) according to the tenth embodiment.

[0281] Figure 107It is a schematic diagram showing the relationship between the engaging structure and the engaged structure in the middle of flow path switching (in the middle of relative ascending) according to the tenth embodiment.

[0282] Figure 108 The 10th embodiment is shown in an enlarged manner. Figure 107 Schematic diagram of the connecting parts.

[0283] Figure 109 This is a schematic diagram showing the relationship between the engaging structure and the engaged structure during flow path switching in the tenth embodiment, immediately after the top of the shaft protrusion passes over the top of the disk protrusion (starts to descend relatively).

[0284] Figure 110 The 10th embodiment is shown in an enlarged manner. Figure 109 Schematic diagram of the connecting parts.

[0285] Figure 111 It is a schematic diagram showing the relationship between the engaging structure and the engaged structure in the middle of flow path switching (in the middle of relative descent) according to the tenth embodiment.

[0286] Figure 112 This is a schematic diagram showing the relationship between the engaging structure and the engaged structure before the flow path switching is completed (before the relative descent is completed) in the tenth embodiment.

[0287] Figure 113 This is a schematic diagram showing the relationship between the engaging structure and the engaged structure when the flow path switching is completed (when the relative descent is completed) according to the tenth embodiment.

[0288] Figure 114 The relationship between the engaging structure and the engaged structure in the middle of the flow path switching (relatively rising middle) of the 11th embodiment is shown in FIG. Figure 107 The schematic diagram shall prevail.

[0289] Figure 115 This is an enlarged representation of the 11th embodiment. Figure 114 Schematic diagram of the connecting parts. DETAILED DESCRIPTION

[0290] Hereinafter, several embodiments of the flow path switching device will be described in detail with reference to the drawings.

[0291] <First embodiment>

[0292] First, refer to Figures 1 to 20 The first embodiment will be described in detail.

[0293] [Overview of the flow path switching device]

[0294] exist Figure 1 In FIG, the flow path switching device 1 of this embodiment is shown in a perspective view. Figure 2 In FIG, the flow path switching device 1 is shown in a front view. Figure 3 In FIG, the flow path switching device 1 is shown in a top view. Figure 4 In FIG, the flow path switching device 1 is shown from a bottom view. Figure 5 In FIG, the flow path switching device 1 is shown in an exploded perspective view. Figure 6 In, by Figure 3 The AA line cross-sectional view shows the flow path switching device 1. Figures 1 to 6 As shown, the flow path switching device 1 includes a housing 2 , a valve element 3 disposed inside the housing 2 , and a driving unit 4 that drives the valve element 3 .

[0295] [About the housing]

[0296] The housing 2 is constructed by fastening an upper housing 11 and a lower housing 12 by a plurality of screws 6. The housing 2 includes an inlet flow path 20 for fluid to flow in and an outlet flow path 30 for fluid to flow out. Here, as an example, the flow path switching device 1 is configured as an eight-way valve, and the housing 2 has four inlet flow paths 20 and four outlet flow paths 30. As the four inlet flow paths 20, a first inlet flow path 21, a second inlet flow path 22, a third inlet flow path 23, and a fourth inlet flow path 24 are provided in the upper housing 11. In addition, as the four outlet flow paths 30, a first outflow flow path 31, a second outflow flow path 32, a third outflow flow path 33, and a fourth outflow flow path 34 are provided in the lower housing 12. In addition, the inflow flow path 20 and the outflow flow path 30 are equivalent to an example of a "communication path" provided in the "housing" of the disclosed technology. In the present embodiment, the housing 2 is formed of, for example, resin.

[0297] [About the valve core]

[0298] like Figure 5 and Figure 6 As shown, the valve core portion 3 includes a fixed disk 13 that does not rotate within the housing 2; a rotating disk 14 that is stacked on the fixed disk 13 and rotates relative to the fixed disk 13; and a rotating shaft 15 for rotating the rotating disk 14. The rotating disk 14 and the fixed disk 13 are stacked in the axial direction X. The rotating disk 14 is an example of a "drive disk" in the disclosed technology. The rotating disk 14 and the fixed disk 13 are formed of, for example, resin.

[0299] [About the rotating disk]

[0300] exist Figure 7 In FIG, the rotating disk 14 is shown from a top view. Figure 6 、 Figure 7As shown, the rotating disk 14 is accommodated inside the housing 2. The rotating disk 14 is formed in the shape of a circular plate with a thickness, and includes four rotating communication passages 40 that pass through in the axial direction X. As the four rotating communication passages 40, a first rotating communication passage 41, a second rotating communication passage 42, a third rotating communication passage 43 and a fourth rotating communication passage 44 are provided. The rotating communication passage 40 is formed in the shape of a long hole that is slightly curved when viewed from above. The rotating communication passage 40 is equivalent to an example of a "communication passage" provided in the "drive disk" of the disclosed technology. A through hole 14a is formed in the center of the rotating disk 14 for the rotating shaft 15 to pass through. The through hole 14a has a cross-sectional shape with two opposing sides that is larger than the outer diameter of the rotating shaft 15 (the shape of a small pan of an ancient Japanese gold coin).

[0301] [About the rotation axis]

[0302] exist Figure 8 In the figure, the upper housing 11 and the rotating shaft 15 are shown in an exploded perspective view. In this embodiment, the rotating shaft 15 is formed of resin. The rotating shaft 15 is provided so as to penetrate the upper housing 11 and the rotating disk 14. Figure 5 、 Figure 6 The lower end side) is connected to the fixed disk 13 and the rotating disk 14, and the other end side in the axial direction X ( Figure 5 、 Figure 6 The upper end side of the drive unit 4 is connected. Figure 8 As shown, the other end of the rotating shaft 15 passes through the through hole 11a formed in the upper shell 11 and extends upward to be connected to the driving unit 4. Figure 6 As shown, a lip seal 26 is provided between the upper housing 11 and the rotating shaft 15. Alternatively, the rotating shaft 15 may be formed of metal.

[0303] In this embodiment, the rotating disk 14 and the rotating shaft 15 are connected in a manner that allows relative movement in the rotational direction and the axial direction. Figures 5 to 8 As shown, one end side of the rotating shaft 15 ( Figure 5 、 Figure 6 The lower end side of the rotating disk 14 has a cross-sectional shape with two opposing sides (the shape of a small Japanese ancient gold coin) similar to the through hole 14a of the rotating disk 14, and has a cross-sectional shape smaller than the through hole 14a. That is, the connection between the rotating shaft 15 and the rotating disk 14 (the through hole 14a and the lower side portion of the rotating shaft 15 corresponding to the through hole 14a) has a gap 28 in the rotation direction (see the following description). Figures 13 to 20Furthermore, the rotating shaft 15 is connected to the through-hole 14a so as to be movable relative to the through-hole 14a in both the rotational and axial directions. The rotating shaft 15 is assembled into the through-hole 14a of the rotating disk 14 so that its central axis coincides with the central axis of the rotating disk 14. The rotating shaft 15 receives driving force from the driving unit 4 and rotates, thereby idling in the through-hole 14a by an amount corresponding to the gap 28, and then engages with the inner wall of the through-hole 14a, rotating integrally with the rotating disk 14.

[0304] [About fixed disk]

[0305] exist Figure 9 In FIG, the fixed plate 13 is shown in a three-dimensional diagram. Figure 6 As shown, the fixing plate 13 is accommodated in the interior of the lower housing 12. Figure 5 、 Figure 6 as well as Figure 9 As shown, the fixed disk 13 includes a circular plate portion 13a and a plurality of cylindrical portions 13b extending downward from the circular plate portion 13a. The circular plate portion 13a is formed into a circular plate shape and includes four fixed communication passages 50 penetrating in the axial direction. Figure 5 、 Figure 8 As shown, four fixed communication passages 50 are provided: a first fixed communication passage 51, a second fixed communication passage 52, a third fixed communication passage 53, and a fourth fixed communication passage 54. The fixed communication passages 50 are an example of "communication passages" provided in the "fixed disk" of the disclosed technology.

[0306] The four cylindrical portions 13b of the fixed disk 13 are integrally formed with the circular plate portion 13a, and the interior of each cylindrical portion 13b forms a fixed communication path 50. Each cylindrical portion 13b is arranged so as to communicate with each outflow flow path 30. A spring 16 is provided between the fixed disk 13 and the lower housing 12 to bias the fixed disk 13 toward the rotating disk 14. The spring 16 is arranged so as to be surrounded by the multiple cylindrical portions 13b in the center of the lower surface 13c of the fixed disk 13. In addition, a lip seal 36 is provided between each cylindrical portion 13b and the lower housing 12 to ensure the sealing of the fixed communication path 50.

[0307] [About the drive unit]

[0308] The drive unit 4 includes a motor and a reduction mechanism (not shown) for applying rotational drive force to the rotating shaft 15. The flow path switching device 1 uses the drive unit 4 to rotate the rotating disk 14 via the rotating shaft 15, changing the connection combination of the four rotating communication paths 40, the four inflow flow paths 20, and the four fixed communication paths 50, thereby switching the fluid flow path between several modes. The description of switching the flow path mode is omitted here.

[0309] [Regarding the sealing member]

[0310] In this embodiment, sealing members 17 and 18 are provided between the housing 2, the fixed disk 13, and the rotating disk 14 to prevent leakage of the fluid. Figures 5 to 7 As shown, in this embodiment, the sealing members 17 and 18 are provided on the rotating disk 14. That is, the sealing members 17 and 18 are provided on the upper and lower end surfaces 14b and 14c of the rotating disk 14 so as to surround the opening of the rotating communication passage 40 and protrude from the upper and lower end surfaces 14b and 14c. Figure 6 In the embodiment, four upper sealing members 17 are provided on the upper end surface 14b of the rotating disk 14, corresponding to the four rotating communication passages 40. Four lower sealing members 18 are provided on the lower end surface 14c of the rotating disk 14, corresponding to the four rotating communication passages 40. Upper and lower sealing members 17 and 18 are formed of a fluororesin (e.g., Teflon (registered trademark)). Alternatively, upper and lower sealing members 17 and 18 may be formed of rubber bonded with a fluororesin. Alternatively, upper and lower sealing members 17 and 18 may be formed solely of rubber.

[0311] In the present embodiment, the sealing members 17 and 18 protruding from the upper and lower end surfaces 14b and 14c of the rotating disk 14 are in contact with the inner surface of the upper shell 11 and the upper surface 13d of the fixed disk 13. Therefore, when the rotating disk 14 rotates, a large sliding resistance is generated between the sealing members 17 and 18 and the upper shell 11 and the fixed disk 13. In particular, the sliding resistance is large when the rotating disk 14 starts to rotate. In order to overcome this sliding resistance, it is considered to increase the output of the drive unit 4. However, in this case, the drive unit 4 will be enlarged or the manufacturing cost of the drive unit 4 will increase. Therefore, in the present embodiment, in order to solve the above-mentioned problem, a sliding resistance mitigation structure that mitigates the sliding resistance of each sealing member 17 and 18 is provided in the flow path switching device 1.

[0312] [About the sliding resistance mitigation structure]

[0313] That is, in this embodiment, if Figure 5 、 Figure 6 as well as Figure 8 As shown, the front end portion (lower end portion in the figure) 15a of the rotating shaft 15 is provided so as to be in contact with and engaged with the fixed disk 13. An engaging structure K1 (see FIG. 1 ) for the fixed disk 13 is provided at the front end portion 15a. Figure 8 The fixed plate 13 is configured to abut and engage with the front end portion 15a of the rotating shaft 15 as it rotates, so that the fixed plate 13 can reciprocate in the axial direction X. An engaged structure K2 is provided at the center of the upper surface of the fixed plate 13 with which the engaging structure K1 of the rotating shaft 15 engages (see Figure 9 The sliding resistance mitigation structure is composed of the engaging structure K1 and the engaged structure K2.

[0314] exist Figure 10 In the enlarged view, Figure 9 The fixed plate 13 is shown as having an engaged structure K2. Figure 11 In FIG, the rotation axis 15 is shown in the front view. Figure 12 In the perspective diagram, Figure 11 The portion of the engagement structure K1 surrounded by the dotted line circle (front end portion 15a). Figure 11 、 Figure 12 As shown, the front end face (lower end face) of the front end portion 15a of the rotating shaft 15 is formed with a plurality (in this embodiment, four) of mountain-shaped protrusions (shaft projections) 15b arranged circumferentially along its outer periphery and protruding downward. These shaft projections 15b are alternately arranged at equal angular intervals. Each shaft projection 15b has a shape that converges toward the top. Between these adjacent shaft projections 15b, a plurality (in this embodiment, four) of shaft recesses 15c are arranged at equal angular intervals. These plurality of shaft projections 15b and shaft recesses 15c constitute the engaging structure K1 of the rotating shaft 15.

[0315] On the other hand, Figure 10 As shown, in the center of the upper surface 13d of the fixed disk 13, with which the front end 15a of the rotating shaft 15 abuts and engages, a plurality of grooves (disk recesses) 13e are formed. These grooves are arranged annularly and radially at equal angular intervals. These grooves are used to abut and engage the shaft protrusions 15b as the rotating shaft 15 rotates. Disk protrusions 13g are arranged at equal angular intervals between adjacent disc recesses 13e. These multiple disc recesses 13e and disc protrusions 13g are arranged within a circular recess 13f formed in the center of the upper surface 13d of the fixed disk 13, which is circular in plan view. These multiple disc recesses 13e and disc protrusions 13g constitute the engaged structure K2 of the fixed disk 13.

[0316] [Regarding the functions and effects of the flow path switching device]

[0317] According to the structure of the flow path switching device 1 of this embodiment described above, the valve core portion 3 disposed inside the housing 2 includes a rotating shaft 15 and a fixed disk 13 and a rotating disk 14 stacked up and down. Thus, the valve core portion 3 has a disk structure stacked up and down, making it possible to switch complex flow paths with fewer components. Furthermore, the flow path is switched simply by rotating the rotating disk 14 to change the position of the rotating communication path 40, eliminating the need for further components for switching the flow path. Therefore, it is possible to easily switch various flow paths while miniaturizing the flow path switching device 1.

[0318] According to the structure of this embodiment, the protrusions 15b at the front end 15a of the rotating shaft 15 engage and disengage with the multiple disc recesses 13e of the fixed disk 13 as it rotates. The fixed disk 13 is biased toward the front end 15a of the rotating shaft 15 by the spring 16. Consequently, the protrusions 15b and the disc recesses 13e align with each other, and the protrusions 15b engage with each disc recess 13e. Consequently, the fixed disk 13 is pushed upward toward the rotating disk 14 by the force of the spring 16, causing it to contact the lower sealing member 18. Meanwhile, the protrusions 15b disengage from the corresponding disc recess 13e and climb onto the protrusions 13g between the disc recesses 13e. This causes the fixed disk 13 to overcome the force of the spring 16 and be pushed downward away from the rotating disk 14, separating it from the lower sealing member 18.

[0319] Here, in Figures 13 to 20 , for the flow path switching device 1 , the operation of the sliding resistance mitigation structure when transitioning from a switching state of a certain flow path to another switching state, and the operations of the rotating shaft 15 , the rotating disk 14 , and the fixed disk 13 when the rotating shaft 15 rotates and the rotating disk 14 rotates are shown in stages.

[0320] Figure 13 1 is a cross-sectional view schematically showing the state of the upper housing 11, the rotating disk 14, the fixed disk 13, and the rotating shaft 15 before operation. Figure 14 In, by Figure 13 The BB line cross-sectional view shows the rotating disk 14 and the rotating shaft 15. Figure 13 、 Figure 14 1 and 2 show a state in which the rotary disk 14 and the rotary shaft 15 are both stopped and the upper and lower sealing members 17 and 18 are in contact with the upper housing 11 and the fixed disk 13, respectively.

[0321] Figure 15 This is a cross-sectional view schematically showing a state where the upper housing 11, the rotating disk 14, the fixed disk 13, and the rotating shaft 15, etc., have started to rotate. Figure 16 In, by Figure 15 The CC line cross-sectional view shows the rotating disk 14 and the rotating shaft 15. Figure 15 、 Figure 16 FIG. 1 shows a state in which rotating shaft 15 has rotated only a predetermined angle within through-hole 14a. As a result, distal end 15a of rotating shaft 15 presses fixed disk 13 downward due to the contact between protruding shaft portion 15b and disk recess 13e. At this point, protruding shaft portion 15b disengages from disk recess 13e and climbs onto disk protruding portion 13g between disk recesses 13e. As a result, fixed disk 13 is pressed downward against the biasing force of spring 16, upper sealing member 17 separates from upper housing 11, and lower sealing member 18 separates from fixed disk 13.

[0322] Figure 17 1 is a cross-sectional view schematically showing the operating state of the upper housing 11, the rotating disk 14, the fixed disk 13, the rotating shaft 15, etc. when the rotating shaft 15 further rotates. Figure 18 In, by Figure 17 The DD line cross-sectional view shows the rotating disk 14 and the rotating shaft 15. Figure 17 、 Figure 18 During this time, rotating shaft 15 further rotates a predetermined angle, causing rotating disk 14 to rotate along with rotating communication passage 40. At this time, rotating disk 14 rotates after fixed disk 13 is pressed downward. Furthermore, the gaps between upper housing 11 and fixed disk 13, as well as the gaps between rotating disk 14 and fixed disk 13, are increased. Consequently, the sliding resistance of upper and lower sealing members 17 and 18 during rotation of rotating disk 14 is reduced, and sliding wear of upper and lower sealing members 17 and 18 is also reduced.

[0323] Figure 19 This is a cross-sectional view schematically showing a state where the upper housing 11, the rotating disk 14, the fixed disk 13, and the rotating shaft 15 have completed their operations after the rotating shaft 15 and the rotating disk 14 have further rotated. Figure 20 In, by Figure 19 The EE line cross-sectional view shows the rotating disk 14 and the rotating shaft 15. Figure 19 、 Figure 20 In the process, the rotating shaft 15 further rotates a predetermined angle, and the rotating disk 14 and the rotating communication passage 40 further rotate a predetermined angle. At this time, the shaft protrusions 15b of the rotating shaft 15 enter the disk recesses 13e of the fixed disk 13, and the fixed disk 13 is pushed upward by the force of the spring 16. The upper sealing member 17 contacts the upper housing 11, and the lower sealing member 18 contacts the rotating disk 14.

[0324] According to the structure of this embodiment, as described above, the rotating disk 14 rotates relative to the fixed disk 13 as the rotating shaft 15 rotates. At this time, the sliding resistance generated by the lower sealing member 18 between the fixed disk 13 and the rotating disk 14 as the rotating disk 14 rotates is reduced. Specifically, according to the above structure, the front end 15a of the rotating shaft 15 is configured to abut and engage with the fixed disk 13, and the fixed disk 13 is configured so that the front end 15a of the rotating shaft 15 abuts and engages with the fixed disk 13 as it rotates, thereby enabling the fixed disk 13 to reciprocate in the axial direction. Therefore, when the rotating disk 14 rotates as the rotating shaft 15 rotates, the fixed disk 13 reciprocates in the axial direction X, thereby increasing the gaps between the upper housing 11 and the rotating disk 14, and between the fixed disk 13 and the rotating disk 14. This reduces the surface pressure applied to the upper sealing member 17 and the lower sealing member 18 between the upper housing 11 and the rotating disk 14, and between the fixed disk 13 and the rotating disk 14, thereby reducing the sliding resistance of each sealing member 17 and 18. Therefore, when the rotary disk 14 rotates, it is possible to suppress the sealing members 17 and 18 from sliding and wearing or from being caught and falling off.

[0325] Furthermore, according to the structure of this embodiment, the rotating disk 14 and the rotating shaft 15 are connected so as to be relatively movable in the rotational direction and the axial direction X. Therefore, when the rotating disk 14 rotates and applies surface pressure to the sealing members 17 and 18, the rotating disk 14 moves in the rotational direction and the axial direction X within the gap between the housing 2 and the fixed disk 13, and is positioned to achieve a balance with the reaction force of the sealing members 17 and 18. This further reduces the surface pressure applied to the sealing members 17 and 18 during the rotation of the rotating disk 14, thereby improving the durability of the sealing members 17 and 18.

[0326] According to the structure of this embodiment, sealing members 17 and 18 are provided in the axial direction X of the flow path switching device 1, between the housing 2 (upper housing 11) and the rotating disk 14, and between the rotating disk 14 and the fixed disk 13, respectively. Furthermore, in the axial direction X, elastic sealing members 17 and 18 are provided between the upper housing 11 and the rotating disk 14, and between the rotating disk 14 and the fixed disk 13, respectively. Therefore, the rotating disk 14 is supported in a suspended state by the upper and lower sealing members 17 and 18. Therefore, when the rotating disk 14 rotates, the suspension effect can suppress the sliding resistance caused by the application of fluid pressure, and the sealing members 17 and 18, which ensure the sealing of the rotating communication path 40 and the fixed communication path 50, can prevent uneven wear. Thus, the sealing members 17 and 18 can reliably prevent fluid from leaking from the rotating communication path 40 and the fixed communication path 50. Therefore, the sealing of the flow path formed by the inflow flow path 20, the rotating communication path 40, and the fixed communication path 50 can be ensured.

[0327] Furthermore, according to the structure of this embodiment, each sealing member 17 and 18 can also serve as an elastic member for maintaining the posture of the fixed disk 13 and the rotating disk 14. This eliminates the need for separate elastic members, reduces the number of components, and enables a reduction in the size of the flow path switching device 1. Furthermore, because the axial direction X of the fixed disk 13 and the rotating disk 14 coincides with the sealing direction of each sealing member 17 and 18, sealing performance is maintained even if the central axis of the rotating disk 14 deviates during rotation.

[0328] Furthermore, according to the structure of this embodiment, the upper sealing member 17 disposed between the upper housing 11 and the rotating disk 14 and the lower sealing member 18 disposed between the rotating disk 14 and the fixed disk 13 are arranged at the same position in the radial direction of the rotating disk 14. Therefore, the rotating communication passage 40 is sealed by the sealing members 17 and 18 at the same positions on both the upper end surface 14b and the lower end surface 14c of the rotating disk 14. The areas where the fluid pressure acts are the same on both the upper and lower end surfaces 14b and 14c of the rotating disk 14. Therefore, the fluid pressure acting on the upper and lower end surfaces 14b and 14c of the rotating disk 14 is offset, and only the force of the spring 16 acts on the rotating disk 14, maintaining the position of the rotating disk 14. As a result, the sliding resistance between the rotating disk 14 and the fixed disk 13 is reduced during the rotation of the rotating disk 14. As a result, the power consumption of the drive unit 4 that drives the rotating disk 14 can be suppressed, thereby reducing the power consumption of the drive unit 4. Furthermore, since the load applied from the rotary disk 14 to the sealing members 17 and 18 is reduced, the reliability of the sealing performance of the sealing members 17 and 18 can be improved.

[0329] Furthermore, according to the structure of this embodiment, at least a portion of the cylindrical portion 13b of the fixed disk 13 is inserted into the inner side of the outflow channel 30. Therefore, it is possible to prevent the fixed disk 13 from shifting in the circumferential direction as the rotating disk 14 is driven and rotated. Furthermore, because the direction in which the rotating disk 14 may shift (i.e., the left-right direction intersecting the axial direction X) differs from the sealing direction of each sealing member 17 and 18 (i.e., the axial direction X), the sealing performance of each sealing member 17 and 18 can be maintained even if the rotating disk 14 shifts in the axial direction.

[0330] According to the structure of this embodiment, the upper sealing member 17 disposed between the upper housing 11 and the rotating disk 14 and the lower sealing member 18 disposed between the rotating disk 14 and the fixed disk 13 are arranged at the same position in the radial direction of the rotating disk 14. Therefore, even if the rotating disk 14 tilts due to fluid pressure, etc., the reaction force of each sealing member 17 and 18 can be used to restore the rotating disk 14 to a horizontal state. In addition, each sealing member 17 and 18 seals in the circumferential direction relative to the upper housing 11 and the fixed disk 13, and a surface pressure acts uniformly in the horizontal direction. Therefore, the sliding resistance of each sealing member 17 and 18 is small and wears evenly. Therefore, the rotating disk 14 can be maintained in a horizontal state even after many years.

[0331] According to the structure of this embodiment, the connection portion between the rotating shaft 15 and the rotating disk 14 (the portion of the rotating shaft 15 corresponding to the through-hole 14a) has a gap 28 in the rotational direction. Therefore, when the rotating shaft 15 is rotated, the rotating shaft 15 idles by an amount corresponding to the gap 28 in the connection portion. Therefore, even when the rotating shaft 15 is rotated, the gap between the upper housing 11 and the rotating disk 14, as well as the gap between the fixed disk 13 and the rotating disk 14, can be set to a state where the gap between the upper housing 11 and the rotating disk 14, and the gap between the fixed disk 13 and the rotating disk 14 are increased without rotating the rotating disk 14. As a result, a period in which the gap between the upper housing 11 and the rotating disk 14, as well as the gap between the fixed disk 13 and the rotating disk 14, are increased can be provided before the rotating shaft 15 is driven to rotate.

[0332] <Second embodiment>

[0333] Next, refer to Figures 21 to 39D In the following description, the same reference numerals are given to the components equivalent to those in the first embodiment, and the description thereof will be omitted. The following description will focus on the differences.

[0334] [About the sliding resistance mitigation structure]

[0335] The appearance and the basic internal structure of the flow path switching device 1 of this embodiment are the same as those of the first embodiment, but it differs from the first embodiment in the structure of the above-mentioned "sliding resistance mitigation structure". Figure 21 In FIG, a state where the upper housing 11 and the driving unit 4 are removed from the flow path switching device 1 according to this embodiment is shown in a top view. Figure 22 In the enlarged top view, Figure 21 The through hole 14a and the portion of the rotating shaft 15 (the portion surrounded by the dotted line). Figure 23 In FIG, the rotating shaft 15 of this embodiment is shown in a perspective view. Figure 24 In the enlarged perspective view, Figure 23The engaging structure K1 of the front end portion of the rotating shaft 15 is shown. Figure 25 In FIG, the fixed plate 13 of this embodiment is shown in a top view. Figure 26 In the enlarged perspective view, Figure 25 The engaged structure K2 of the fixing plate 13 is shown.

[0336] In this embodiment, the basic structure of the fixed disk 13, the rotating disk 14, the rotating shaft 15, the upper sealing member 17 and the lower sealing member 18 is the same as that of the first embodiment, but Figures 21 to 26 As shown, the embodiment differs from the first embodiment in the cross-sectional shape of the through hole 14a of the rotating disk 14, the shape of the portion of the rotating shaft 15 that engages with the through hole 14a, the structure of the engaging structure K1 of the rotating shaft 15, and the structure of the engaged structure K2 of the fixed disk 13.

[0337] That is, Figure 22 As shown, the cross-sectional shape of the through hole 14a is a butterfly wing shape with two fan-shaped fans arranged rotationally symmetrically about its axis. The cross-sectional shape of the portion of the rotating shaft 15 that engages with the through hole 14a is a shape with two opposing sides that can rotate in the through hole 14a (the shape of a small handicap on an ancient Japanese gold coin). In this embodiment, the connection portion between the rotating shaft 15 and the rotating disk 14 (the portion corresponding to the rotating shaft 15 and the through hole 14a) has a predetermined gap 28 between the rotating shaft 15 and the inner wall of the through hole 14a. As a result, the rotating shaft 15 obtains a driving force from the driving unit 4 and rotates, thereby idling in the through hole 14a by an amount corresponding to the gap 28, and then engages with the inner wall of the through hole 14a and rotates integrally with the rotating disk 14.

[0338] like Figure 23 、 Figure 24 As shown, the engaging structure K1 provided at the front end portion of the rotating shaft 15 has a shape substantially the same as that of the first embodiment, including four recesses (shaft recesses) 15c and four protrusions (shaft protrusions) 15b arranged in the circumferential direction. Each shaft protrusion 15b is arranged at equal angles (90°) and the shaft recesses 15c are formed between these shaft protrusions 15b. Each shaft recess 15c and each shaft protrusion 15b include side portions 15d inclined in their circumferential direction (arrangement direction). In the present embodiment, the top 15e of each shaft protrusion 15b is formed as a convex curved surface protruding outward, including side portions 15d inclined to both sides thereof with the top 15e as the boundary. The inclination angles of the two side portions 15d are set to the same angle. The two side portions 15d are also the side portions of the shaft recess 15c. In addition, the bottom of each shaft recess 15c is a flat surface.

[0339] On the other hand, Figure 25 、 Figure 26 As shown, the engaged structure K2 provided in the center of the upper surface 13d of the fixed disk 13 includes four protrusions (disk protrusions) 13g and four recesses (disk recesses) 13e that can abut and engage with the shaft recess 15c and the shaft protrusion 15b as the rotating shaft 15 rotates. The disk protrusions 13g are arranged at equal angles (90°) apart, and the disk recesses 13e are formed between these disk protrusions 13g. In this embodiment, each disk protrusion 13g includes a side surface 13i that is inclined circumferentially (in the arrangement direction) on both sides of the top 13h with its top 13h as the boundary. The inclination angles of these two side surfaces 13i are set to the same angle. These two side surfaces 13i are also side surfaces of the disk recess 13e. In addition, the bottom of each disk recess 13e is a flat surface.

[0340] [About flow path mode switching]

[0341] The flow path switching device 1 of the present embodiment has the above-described configuration, and can switch the flow path of the fluid into four modes. Figures 27A to 39D An operation diagram related to switching of flow path modes is shown.

[0342] first, Figures 27A to 27D The "initial state" of the flow path switching device 1 of this embodiment is shown. Figure 27A Schematic diagram showing the engagement relationship between the through hole 14a of the rotating disk 14 and the rotating shaft 15. Figure 28A 、 Figure 29A 、 Figure 30A 、 Figure 31A 、 Figure 32A 、 Figure 33A 、 Figure 34A 、 Figure 35A 、 Figure 36A 、 Figure 37A 、 Figure 38A as well as Figure 39A Therefore Figure 27A Schematic diagram for the reference. Figure 27B Schematic diagram showing the change in the lift (upward thrust) of the rotating shaft 15 relative to the rotation angle (rotating shaft angle) of the rotating shaft 15. Figure 27B In the figure, the mountain and valley shapes indicated by thick lines correspond to the disc protrusion 13g and disc recess 13e, respectively, and the black circle corresponds to the position of the shaft protrusion 15b (the same as in similar figures described later). Figure 28B 、 Figure 29B 、 Figure 30B 、 Figure 31B 、 Figure 32B 、 Figure 33B 、 Figure 34B 、 Figure 35B 、 Figure 36B 、 Figure 37B 、 Figure 38B as well as Figure 39B Therefore Figure 27B Schematic diagram for the reference. Figure 27C 14a and the rotational position of the rotating shaft 15, and the positional relationship between the disc protrusion 13g and the disc recess 13e and the shaft protrusion 15b. Figure 28C 、 Figure 29C 、 Figure 30C 、 Figure 31C 、 Figure 32C 、 Figure 33C 、 Figure 34C 、 Figure 35C 、 Figure 36C 、 Figure 37C 、 Figure 38C as well as Figure 39C Therefore Figure 27C The top view of the base. Figure 27D The rotation position of the rotating disk 14 and the rotating communication passage 40 is indicated by Figure 21 The top view is based on . Figure 27D In FIG. 1 , the reference line L1 indicated by the thick dashed line indicates the reference position in the rotating disk 14 (the same applies to similar figures described later). Figure 28D 、 Figure 29D 、 Figure 30D 、 Figure 31D 、 Figure 32D 、 Figure 33D 、 Figure 34D 、 Figure 35D 、 Figure 36D 、 Figure 37D 、 Figure 38D as well as Figure 39D Therefore Figure 27D The top view of the base.

[0343] In this "initial state", if Figure 27A As shown, the rotating shaft 15 is engaged with the inner wall of one side of the through hole 14a, as shown in FIG. Figure 27B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 27C As shown, the shaft protrusion 15b falls on the disc recess 13e. Moreover, the rotating disc 14 and the rotating communication passage 40 are configured as follows: Figure 27D The state shown is shown. At this time, the first rotating communication passage 41 is connected to the second inflow passage 22 and the second fixed communication passage 52, the second rotating communication passage 42 is connected to the third inflow passage 23 and the third fixed communication passage 53, the third rotating communication passage 43 is connected to the fourth inflow passage 24 and the fourth fixed communication passage 54, and the fourth rotating communication passage 44 is connected to the first inflow passage 21 and the first fixed communication passage 51. The rotation angle of the rotating disk 14 at this time (disc rotation angle) is defined as "0°", and the switching state of the passages is defined as "Mode A".

[0344] Next, changes from the "initial state" will be described in sequence. Figures 28A to 28DThe "45° rotation state" is shown in which the rotation shaft 15 is rotated "45°" clockwise from the "initial state". In this state, as shown in FIG. Figure 28A As shown, the rotating shaft 15 idles "45°" clockwise from the "initial state" and engages with the inner wall of the other side of the through hole 14a, as shown in FIG. Figure 28B As shown in FIG, the rotation axis 15 is relatively raised. Figure 28C As shown, the shaft protrusion 15b climbs up the disc protrusion 13g. Figure 28D As shown, the disk rotation angle is maintained at "0°", and the flow path switching state of the rotating communication path 40 becomes "mode A" which is the same as the "initial state".

[0345] As described above, in this embodiment, when the front end portion of the rotating shaft 15 changes from the state of being engaged with the fixed disk 13 to the state of being in contact with the fixed disk 13, that is, when the shaft protrusion 15b climbs up from the disk recess 13e to the disk protrusion 13g, the "idling angle" for idling the rotating shaft 15 in the clockwise direction is set to "45°". Figure 27A In the “initial state” shown, the rotary shaft 15 is of the “one-side idling only type” capable of idling only in the clockwise direction.

[0346] then, Figures 29A to 29D The figure shows a "90° rotation state" in which the rotation shaft 15 is further rotated "45°" clockwise from the "45° rotation state". In this state, as shown in FIG. Figure 29A As shown, the rotating shaft 15 rotates clockwise "45°" together with the rotating disk 14. Figure 29B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 29C As shown, the shaft protrusion 15b falls on the disc recess 13e. Figure 29D As shown, the rotating communication channel 40 rotates 45° clockwise. In this "90° rotation state," the first rotating communication channel 41 communicates with the second inflow channel 22 and the third fixed communication channel 53; the second rotating communication channel 42 communicates with the third inflow channel 23 and the fourth fixed communication channel 54; the third rotating communication channel 43 communicates with the fourth inflow channel 24 and the first fixed communication channel 51; and the fourth rotating communication channel 44 communicates with the first inflow channel 21 and the second fixed communication channel 52. The disk rotation angle at this time is 45°, and this channel switching state is defined as "Mode B." That is, between the "45° rotation state" and the "90° rotation state," the relative lowering of the rotating shaft 15 and the channel switching occur simultaneously.

[0347] As described above, in this embodiment, the "switching angle" at which the rotary disk 14 rotates to switch the flow path of the flow path switching device 1 is set to "45°." That is, in this embodiment, the clockwise "idle angle" of the rotating shaft 15 and the "switching angle" of the rotary disk 14 for switching the flow path are both set to the same "45°."

[0348] then, Figures 30A to 30D The rotation axis 15 is further rotated clockwise by 45° from the 90° rotation state to the 135° rotation state. Figure 30A As shown, the rotating shaft 15 rotates clockwise "45°" together with the rotating disk 14. Figure 30B As shown in FIG, the rotation axis 15 is relatively raised. Figure 30C As shown, the shaft protrusion 15b climbs up the disc protrusion 13g. Figure 30D As shown, the rotating communication channel 40 rotates 45° clockwise. In this "135° rotation state," the first rotating communication channel 41 communicates with the third inflow channel 23 and the third fixed communication channel 53; the second rotating communication channel 42 communicates with the fourth inflow channel 24 and the fourth fixed communication channel 54; the third rotating communication channel 43 communicates with the first inflow channel 21 and the first fixed communication channel 51; and the fourth rotating communication channel 44 communicates with the second inflow channel 22 and the second fixed communication channel 52. The disk rotation angle at this time is 90°, and this channel switching state is defined as "Mode C." That is, between the "90° rotation state" and the "135° rotation state," the relative elevation of the rotating shaft 15 and the channel switching occur simultaneously.

[0349] then, Figures 31A to 31D The rotating shaft 15 is shown as "returning to the 90° rotation state" by rotating "45°" counterclockwise from the "135° rotation state". In this state, as shown in FIG. Figure 31A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees and engages with the inner wall of one side of the through hole 14a. Figure 31B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 31C As shown, the shaft protrusion 15b falls on the disc recess 13e. Figure 31D As shown, the rotating communication path 40 stops at the same position as in the "135° rotation state" and the disk rotation angle remains at "90°." The flow path switching state at this time is "mode C," which is the same as in the "135° rotation state."

[0350] As described above, in this embodiment, the "idle angle" at which the rotating shaft 15 rotates counterclockwise when the shaft protrusion 15b drops from the disk protrusion 13g to the disk recess 13e is also set to "45°." That is, in this embodiment, the counterclockwise "idle angle" of the rotating shaft 15 and the "switching angle" of the rotating disk 14 for switching the flow path are also set to the same "45°."

[0351] then, Figures 32A to 32D The figure shows that the rotation shaft 15 has rotated 45° clockwise from the "90° rotation state" to the "135° rotation state again". Figure 32AAs shown, the rotating shaft 15 rotates clockwise by 45 degrees and engages with the inner wall of the other side of the through hole 14a. Figure 32B As shown in FIG, the rotation axis 15 is relatively raised. Figure 32C As shown, the shaft protrusion 15b climbs up the disc protrusion 13g. Figure 32D As shown, the rotating communication channel 40 stops at the same position as the "90° rotation state", and the disk rotation angle is maintained at "90°". The flow channel switching state at this time is "Mode C".

[0352] then, Figures 33A to 33D The rotating shaft 15 is shown as a "180° rotation state" in which the rotating shaft 15 is rotated "45°" clockwise from the "135° rotation state again". In this state, as shown in FIG. Figure 33A As shown, the rotating shaft 15 rotates clockwise "45°" together with the rotating disk 14. Figure 33B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 33C As shown, the shaft protrusion 15b falls on the disc recess 13e. Figure 33D As shown, the rotating communication channel 40 further rotates clockwise by 45°. In this "180° rotation state," the first rotating communication channel 41 communicates with the third inflow channel 23 and the fourth fixed communication channel 54; the second rotating communication channel 42 communicates with the fourth inflow channel 24 and the first fixed communication channel 51; the third rotating communication channel 43 communicates with the first inflow channel 21 and the second fixed communication channel 52; and the fourth rotating communication channel 44 communicates with the second inflow channel 22 and the third fixed communication channel 53. At this point, the disk rotation angle is 135°, and this channel switching state is defined as "Mode D." That is, between the "further 135° rotation state" and the "180° rotation state," the relative lowering of the rotating shaft 15 and the channel switching occur simultaneously.

[0353] then, Figures 34A to 34D The rotation shaft 15 is shown as rotating 45° counterclockwise from the 180° rotation state to the "return to 135° rotation state". Figure 34A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees and engages with the inner wall of one side of the through hole 14a. Figure 34B As shown in FIG, the rotation axis 15 is relatively raised. Figure 34C As shown, the shaft protrusion 15b climbs up the disc protrusion 13g. Figure 34D As shown, the rotating communication path 40 stops at the same position as in the "180° rotation state" and the disk rotation angle remains at "135°." The flow path switching state at this time is "mode D," which is the same as in the "180° rotation state."

[0354] then, Figures 35A to 35DThe rotation shaft 15 is shown as rotating 45° counterclockwise from the "returning 135° rotation state" to the "returning 90° rotation state". In this state, Figure 35A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees together with the rotating disk 14. Figure 35B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 35C As shown, the shaft protrusion 15b falls on the disc recess 13e. Figure 35D As shown, the rotating communication passage 40 is in the same position as in the "135° rotation state again," and the disk rotation angle is "90°." The flow path switching state at this time is "Mode C," which is the same as in the "135° rotation state again." That is, between the "135° rotation state return" and the "90° rotation state return," the relative lowering of the rotating shaft 15 and the flow path switching occur simultaneously.

[0355] then, Figures 36A to 36D The figure shows the "return to 45° rotation state" where the rotation shaft 15 is further rotated counterclockwise by "45°" from the "return to 90° rotation state". In this state, as shown in FIG. Figure 36A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees together with the rotating disk 14. Figure 36B As shown in FIG, the rotation axis 15 is relatively raised. Figure 36C As shown, the shaft protrusion 15b climbs up the disc protrusion 13g. Figure 36D As shown, the rotating communication passage 40 is in the same position as in the "90° rotation state," and the disk rotation angle is "45°." The flow path switching state at this time is "Mode B," the same as in the "90° rotation state." That is, the relative rise of the rotating shaft 15 and the flow path switching occur simultaneously between the "90° rotation state" and the "45° rotation state."

[0356] then, Figures 37A to 37D The figure shows the "90° rotation state again" in which the rotation shaft 15 is rotated "45°" clockwise from the "45° rotation state". In this state, as shown in FIG. Figure 37A As shown, the rotating shaft 15 rotates clockwise by 45 degrees and engages with the inner wall of the other side of the through hole 14a. Figure 37B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 37C As shown, the shaft protrusion 15b falls on the disc recess 13e. Figure 37D As shown, the rotating communication channel 40 stops at the same position as the "45° rotation state", and the disk rotation angle is maintained at "45°". The flow channel switching state at this time is the same "mode B" as the "45° rotation state".

[0357] then, Figures 38A to 38DThe figure shows that the rotation shaft 15 has rotated 45° counterclockwise from the "90° rotation state again" to the "45° rotation state". In this state, as shown in FIG. Figure 38A As shown, the rotating shaft 15 rotates counterclockwise and engages with the inner wall of one side of the through hole 14a. Figure 38B As shown in FIG, the rotation axis 15 is relatively raised. Figure 38C As shown, the shaft protrusion 15b climbs up the disc protrusion 13g. Figure 38D As shown, the rotating communication channel 40 stops at the same position as the "90° rotation state again", and the disk rotation angle is maintained at "45°". The flow channel switching state at this time is "mode B".

[0358] Then, Figures 39A to 39D The figure shows the "return to initial state" where the rotation shaft 15 rotates counterclockwise by "45°" from the "return to 45° rotation state". Figure 39A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees together with the rotating disk 14. Figure 39B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 39C As shown, the shaft protrusion 15b falls on the disc recess 13e. Figure 39D As shown, the rotating communication channel 40 has returned to the same position as in the "initial state," with the disk rotation angle at "0°." The flow path switching state at this time is "Mode A," the same as in the "initial state." That is, between "returning to the 45° rotation state" and "returning to the initial state," the relative lowering of the rotating shaft 15 and the switching of the flow paths occur simultaneously.

[0359] [Regarding the functions and effects of the flow path switching device]

[0360] According to the structure of the flow path switching device 1 of the present embodiment described above, in addition to the functions and effects of the first embodiment, the following functions and effects can be achieved. Specifically, according to the structure of the flow path switching device 1, by rotating the rotating shaft 15, a state in which the shaft protrusion 15b abuts the disk protrusion 13g (a protrusion-protrusion abutment state) and a state in which the shaft protrusion 15b and the shaft recess 15c engage with the disk recess 13e and the disk protrusion 13g (a protrusion-recess engagement state) can be achieved. In this state of protrusion-protrusion abutment, the fixed disk 13 moves axially, thereby increasing the gaps between the upper housing 11 and the rotating disk 14, and between the fixed disk 13 and the rotating disk 14, and reducing the surface pressure applied to the upper sealing member 17 and the lower sealing member 18 between the upper housing 11 and the rotating disk 14, and between the fixed disk 13 and the rotating disk 14. In contrast, in the convex-concave engagement state, the fixed disk 13 moves axially, returning the upper housing 11 and rotating disk 14, and the fixed disk 13 and rotating disk 14, to their original spacings. The surface pressures applied to the upper sealing member 17 and the lower sealing member 18 between the upper housing 11 and rotating disk 14, and between the fixed disk 13 and rotating disk 14, return to their original states. When switching between the convex-convex contact state and the convex-concave engagement state, the shaft protrusions 15b and 15c contact the inclined side surfaces 13i and 15d of the disk recesses 13e and 13g. Therefore, switching between the convex-convex contact state and the convex-concave engagement state is smooth.

[0361] According to the structure of this embodiment, when shaft protrusion 15b abuts disk protrusion 13g, top 15e of shaft protrusion 15b forms a convex curved surface. Therefore, when rotating shaft 15 is rotated from this state, the axial position of rotating shaft 15 does not change suddenly. Furthermore, because the bottoms of disk recess 13e and shaft recess 15c are each formed as flat surfaces, when rotating shaft 15 is rotated with shaft protrusion 15b and shaft recess 15c engaged with disk recess 13e and disk protrusion 13g, the axial position of rotating shaft 15 does not change suddenly. This further reduces sliding wear of lower seal member 18.

[0362] According to the structure of this embodiment, when shaft protrusion 15b climbs onto disk protrusion 13g from disk recess 13e, that is, when the gaps between upper housing 11 and rotating disk 14, and between fixed disk 13 and rotating disk 14, are expanded by axial movement of fixed disk 13, the idle angle of rotating shaft 15 and the switching angle of rotating disk 14 during flow path switching are set to the same angle (45°). Therefore, by rotating shaft 15 counterclockwise (in the opposite direction) by the switching angle and idle angle (45°), the rotational position of rotating shaft 15 and the rotational position of rotating disk 14 can be returned to their original positions. Therefore, the flow path switching action when rotating shaft 15 is rotated clockwise (in one direction) can be made consistent with the flow path switching action when rotating shaft 15 is rotated counterclockwise.

[0363] In this embodiment, if Figures 29A to 29D 、 Figures 33A to 33D 、 Figures 35A to 35D as well as Figures 39A to 39D As shown in FIG, when the rotating disk 14 rotates, the rotating shaft 15 relatively descends (the fixed disk 13 and the rotating disk 14 return to their original spacing). Therefore, when the flow path is switched, the surface pressure applied to the sealing members 17 and 18 between the upper housing 11 and the rotating disk 14 and between the fixed disk 13 and the rotating disk 14 is reduced, which can prevent the sealing members 17 and 18 from sliding wear or falling off due to hooking. Figures 30A to 30D as well as Figures 36A to 36D As shown, when the rotary disk 14 rotates, the rotary shaft 15 rises relatively (the gap between the fixed disk 13 and the rotary disk 14 increases), and the same is true in this case.

[0364] In this embodiment, in the "single-side idling type" structure where the flow path can be switched to two modes, the clockwise "idling angle" of the rotating shaft 15 and the "switching angle" of the flow path are set to the same "45°". Figures 29A to 29D 、 Figures 33A to 33D 、 Figures 35A to 35D as well as Figures 39A to 39D As shown, a configuration can be provided in which, when switching the flow path, the flow path is switched and the rotation shaft 15 is then relatively lowered after the rotation shaft 15 is relatively raised. This reduces the driving torque of the rotation shaft 15 (the driving torque of the drive unit 4), and enables miniaturization of the drive unit 4 (motor).

[0365] In this embodiment, as in the first embodiment, a predetermined gap 28 is provided at the connection between the rotating shaft 15 and the rotating disk 14 (between the rotating shaft 15 and the inner wall of the through-hole 14a). Consequently, the rotating shaft 15 receives driving force from the driving unit 4 and rotates, idling in the through-hole 14a by an amount corresponding to the gap 28. It then engages with the inner wall of the through-hole 14a and rotates integrally with the rotating disk 14. Therefore, even when the rotating shaft 15 rotates, the gaps between the upper housing 11 and the rotating disk 14, as well as the gaps between the fixed disk 13 and the rotating disk 14, can be increased without rotating the rotating disk 14. As a result, the rotating disk 14 can be raised or lowered relative to the rotating disk 14 without rotating it.

[0366] Here, we assume a situation where there is no gap in the connection between the rotating shaft and the rotating disk in the direction of rotation. For example, assume that the rotating disk is rotated "45°" to switch the flow path. In this case, when the flow path is switched, the rotating shaft needs to be relatively raised and lowered while the rotating disk is rotated "45°". In this case, the rotating shaft is rotated "22.5°" to make it relatively rise, but in order to increase the lift of the rotating shaft at this time, the driving torque of the rotating shaft needs to be increased. In other words, the lift of the rotating shaft cannot be increased without increasing the driving torque of the rotating shaft. Therefore, the amount of reduction in the surface pressure of the sealing member when the flow path is switched is reduced. In contrast, in this embodiment, since there is a gap 28 in the rotation direction of the rotating shaft 15, that is, since the rotating shaft 15 can be allowed to idle, the lift of the rotating shaft 15 (the amount of expansion of the gap between the fixed disk 13 and the rotating disk 14) can be increased without significantly increasing the driving torque of the rotating shaft 15 (the driving torque of the drive unit 4).

[0367] <Third embodiment>

[0368] Next, refer to Figures 40A to 44C The third embodiment will be described in detail.

[0369] The appearance and internal structure of the flow path switching device 1 of this embodiment are basically the same as those of the first embodiment, but it differs from the second embodiment in the structure of the above-mentioned "sliding resistance mitigation structure", that is, the engaging structure K1 and the engaged structure K2.

[0370] [About flow path mode switching]

[0371] Different from the above-described configuration, the flow path switching device 1 of this embodiment can switch the flow path of the fluid between two modes. Figures 40A to 44C The flow path switching device 1 of this embodiment is a "one-side idling only type" similar to the second embodiment.

[0372] first, Figures 40A to 40C The "initial state" of the flow path switching device 1 of this embodiment is shown. Figure 40A Schematic diagram showing the engagement relationship between the through hole 14a of the rotating disk 14 and the rotating shaft 15. Figure 41A 、 Figure 42A 、 Figure 43A as well as Figure 44A Therefore Figure 40A Schematic diagram for the reference. Figure 40B Schematic diagram showing the change in the lift of the rotating shaft 15 relative to the rotating shaft angle. Figure 41B 、 Figure 42B 、 Figure 43B as well as Figure 44B Therefore Figure 40B Schematic diagram for the reference. Figure 40C The rotation position of the rotating disk 14 and the rotating communication passage 40 is indicated by Figure 21 The following is a top view of the reference. Figure 41C 、 Figure 42C 、 Figure 43C as well as Figure 44C Therefore Figure 40C The top view of the base.

[0373] In this "initial state", if Figure 40A As shown, the rotating shaft 15 is engaged with the inner wall of one side of the through hole 14a, and the shaft protrusion 15b falls into the disc recess 13e, thereby Figure 40B As shown, the rotating shaft 15 is relatively lowered. In addition, the rotating disk 14 and the rotating communication path 40 are configured as follows: Figure 40C The disk rotation angle at this time is "0°", and the switching state of the flow path is the same as "Mode A" in the second embodiment.

[0374] Next, changes from the "initial state" will be described in sequence. Figures 41A to 41C The "45° rotation state" is shown in which the rotation shaft 15 is rotated "45°" clockwise from the "initial state". In this state, as shown in FIG. Figure 41A As shown, the rotating shaft 15 idles "45°" clockwise from the "initial state" and engages with the inner wall of the other side of the through hole 14a, and the shaft protrusion 15b climbs up the disc protrusion 13g, thereby Figure 41B As shown in FIG, the rotation axis 15 is relatively raised. Figure 41C As shown, the disk rotation angle is maintained at "0°", and the flow path switching state of the rotating communication path 40 becomes "mode A" which is the same as the "initial state".

[0375] As described above, in this embodiment as well, the “idle rotation angle” at which the rotating shaft 15 is idly rotated clockwise when the shaft protrusion 15 b climbs onto the disk protrusion 13 g is set to “45°”.

[0376] then, Figures 42A to 42C The figure shows a "90° rotation state" in which the rotation shaft 15 is further rotated "45°" clockwise from the "45° rotation state". In this state, as shown in FIG. Figure 42A As shown, the rotating shaft 15 rotates clockwise by 45 degrees together with the rotating disk 14, and the shaft protrusion 15b falls into the disk recess 13e, thereby Figure 42B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 42C As shown, the disk rotation angle is "45°", and the flow path switching state of the rotating communication path 40 is the same as "Mode B" of the second embodiment. That is, between the "45° rotation state" and the "90° rotation state", the relative lowering of the rotating shaft 15 and the flow path switching are performed simultaneously.

[0377] As described above, in the present embodiment, the clockwise “idle angle” of the rotating shaft 15 and the “switching angle” for switching the flow path are also set to the same “45°”.

[0378] then, Figures 43A to 43C The figure shows the "return to 45° rotation state" where the rotation shaft 15 rotates counterclockwise by 45° from the "90° rotation state". In this state, as shown in FIG. Figure 43A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees and engages with the inner wall of one side of the through hole 14a, and the shaft protrusion 15b climbs up the disc protrusion 13g, thereby Figure 43B As shown in FIG, the rotation axis 15 is relatively raised. Figure 43C As shown, the disk rotation angle is "45°", and the flow path switching state of the rotary communication path 40 is "mode B" which is the same as the "90° rotation state".

[0379] Then, Figures 44A to 44C The figure shows that the rotation shaft 15 is further rotated counterclockwise by 45° from the "returned 45° rotation state" to the "returned initial state". Figure 44A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees together with the rotating disk 14, and the shaft protrusion 15b falls into the disk recess 13e, thereby Figure 44B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 44C As shown, the disk rotation angle is “0°”, and the flow path switching state of the rotary communication path 40 is “mode A” which is the same as the “initial state”.

[0380] [Regarding the functions and effects of the flow path switching device]

[0381] The flow path switching device 1 of the present embodiment described above is different from the second embodiment which can switch the flow path of the fluid into two modes in that its structure can switch into four modes, but can obtain the same functions and effects as the second embodiment.

[0382] In this embodiment, if Figures 42A to 42C and Figures 44A to 44C As shown in FIG. 1 , when the rotating disk 14 rotates (when the flow path is switched), the rotating shaft 15 relatively descends (the fixed disk 13 and the upper housing 11 return to their original spacing). Therefore, it can be seen that when the rotating disk 14 rotates, the surface pressure applied to the sealing members 17 and 18 between the fixed disk 13 and the upper housing 11 decreases, thereby preventing the sealing members 17 and 18 from sliding, wearing, or falling off due to catching.

[0383] In this embodiment, in the "single-side idling type" structure where the flow path can be switched to two modes, the clockwise "idling angle" of the rotating shaft 15 and the "switching angle" of the flow path are set to the same "45°". Figures 42A to 42C and Figures 44A to 44C As shown, a configuration can be provided in which, when switching the flow path, the flow path is switched and the rotation shaft 15 is then relatively lowered after the rotation shaft 15 is relatively raised. This reduces the driving torque of the rotation shaft 15 (the driving torque of the drive unit 4), and enables miniaturization of the drive unit 4 (motor).

[0384] <Fourth embodiment>

[0385] Next, refer to Figures 45A to 49C The fourth embodiment will be described in detail.

[0386] The flow path switching device 1 of the present embodiment is different from the third embodiment in the structure of the above-mentioned “sliding resistance mitigation structure”, that is, in the engagement structure K1 and the engaged structure K2 .

[0387] [About flow path mode switching]

[0388] The flow path switching device 1 of this embodiment is similar to the third embodiment and can switch the flow path of the fluid between two modes. Figures 45A to 49C The flow path switching device 1 of this embodiment is a "one-side idling only type" similar to the third embodiment.

[0389] first, Figures 45A to 45C The "initial state" of the flow path switching device 1 of this embodiment is shown. Figure 45A Schematic diagram showing the engagement relationship between the through hole 14a of the rotating disk 14 and the rotating shaft 15. Figure 46A 、 Figure 47A、 Figure 48A as well as Figure 49A Therefore Figure 45A Schematic diagram for the reference. Figure 45B Schematic diagram showing the change in the lift of the rotating shaft 15 relative to the rotating shaft angle. Figure 46B 、 Figure 47B 、 Figure 48B as well as Figure 49B Therefore Figure 45B Schematic diagram for the reference. Figure 45C The rotation position of the rotating disk 14 and the rotating communication passage 40 is indicated by Figure 21 The following is a top view of the reference. Figure 46C 、 Figure 47C 、 Figure 48C as well as Figure 49C Therefore Figure 45C The top view of the base.

[0390] In this "initial state", if Figure 45A As shown, the rotating shaft 15 is engaged with the inner wall of one side of the through hole 14a, and the shaft protrusion 15b falls into the disc recess 13e, thereby Figure 45B As shown, the rotating shaft 15 is relatively lowered. In addition, the rotating disk 14 and the rotating communication path 40 are configured as follows: Figure 45C The disk rotation angle at this time is "0°", and the switching state of the flow path is the same as "Mode A" in the third embodiment.

[0391] Next, changes from the "initial state" will be described in sequence. Figures 46A to 46C The "22.5° rotation state" is shown in which the rotation shaft 15 is rotated "22.5°" clockwise from the "initial state". In this state, as shown in FIG. Figure 46A As shown, the rotating shaft 15 idles "22.5°" clockwise from the "initial state" and engages with the inner wall of the other side of the through hole 14a, and the shaft protrusion 15b climbs up the disc protrusion 13g, thereby Figure 46B As shown in FIG, the rotation axis 15 is relatively raised. Figure 46C As shown, the disk rotation angle is “0°”, and the flow path switching state of the rotating communication path 40 becomes “mode A” which is the same as the “initial state”.

[0392] As described above, in this embodiment, the “idle rotation angle” at which the rotating shaft 15 is idly rotated clockwise when the shaft protrusion 15 b climbs onto the disk protrusion 13 g is set to “22.5°”.

[0393] then, Figures 47A to 47C The rotation axis 15 is shown as a "67.5° rotation state" in which the rotation axis 15 is rotated "45°" clockwise from the "22.5° rotation state". In this state, as shown in FIG. Figure 47AAs shown, the rotating shaft 15 rotates clockwise by 45 degrees together with the rotating disk 14, and the shaft protrusion 15b falls toward the disk recess 13e, thereby Figure 47B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 47C As shown, the disk rotation angle is "45°", and the flow path switching state of the rotating communication path 40 is the same as "Mode B" of the third embodiment. That is, between the "22.5° rotation state" and the "67.5° rotation state", the relative lowering of the rotating shaft 15 and the flow path switching are performed simultaneously.

[0394] In this embodiment, the "switching angle" for rotating the rotary disk 14 to switch the flow path is set to "45 degrees." That is, in this embodiment, the "switching angle" for switching the flow path is set to an angle greater than the "idle angle" of the rotating shaft 15 in the clockwise direction.

[0395] then, Figures 48A to 48C The figure shows that the rotation shaft 15 has rotated counterclockwise by 22.5° from the "67.5° rotation state" to the "45° rotation state". Figure 48A As shown, the rotating shaft 15 rotates counterclockwise by 22.5° and engages with the inner wall of one side of the through hole 14a, and the shaft protrusion 15b begins to move toward the disc protrusion 13g, thereby Figure 48B As shown, the rotating shaft 15 is relatively raised to the middle. Figure 48C As shown, the disk rotation angle is maintained at "45°", and the flow path switching state of the rotary communication path 40 is "mode B" which is the same as the "67.5° rotation state".

[0396] Then, Figures 49A to 49C The figure shows the "return to initial state" where the rotation shaft 15 rotates counterclockwise by "45°" from the "return to 45° rotation state". Figure 49A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees together with the rotating disk 14, and the shaft protrusion 15b passes over the disk protrusion 13g and falls into the disk recess 13e, thereby Figure 49B As shown, the rotation axis 15 rises and falls relatively. Figure 49C As shown, the disk rotation angle is "0°," and the flow path switching state of the rotating communication path 40 is "Mode A," the same as the "initial state." That is, between "returning to the 45° rotation state" and "returning to the initial state," the relative ascent and descent of the rotating shaft 15 and the flow path switching occur simultaneously.

[0397] [Regarding the functions and effects of the flow path switching device]

[0398] The structure of the flow path switching device 1 of this embodiment described above is similar to the third embodiment, in that the flow path of the fluid can be switched between two modes, and the rotating shaft 15 is configured as a "one-side idling only" type, achieving the same functions and effects as the third embodiment. However, in this embodiment, the "switching angle" of the flow path is different from the "idling angle" of the rotating shaft 15. Therefore, the behavior of the rotating disk 14 and the rotating shaft 15 during flow path switching differs from that of the third embodiment.

[0399] In this embodiment, if Figures 47A to 47C As shown, when the rotating disk 14 rotates, the rotating shaft 15 drops relatively (the interval between the fixed disk 13 and the upper shell 11 returns to its original state), as shown in FIG. Figures 49A to 49C As shown, the rotating shaft 15 rises and falls relative to each other (the gap between the fixed plate 13 and the upper housing 11 is temporarily widened and then returns to its original state). As a result, when the rotating plate 14 rotates, the surface pressure applied to the sealing members 17 and 18 between the fixed plate 13 and the rotating plate 14 is reduced, thereby preventing the sealing members 17 and 18 from sliding, wearing, or falling off due to catching.

[0400] <Fifth embodiment>

[0401] Next, refer to Figures 50A to 58C The fifth embodiment will be described in detail.

[0402] [About flow path mode switching]

[0403] The flow path switching device 1 of this embodiment differs from the second embodiment in the switching mode of the flow path of the fluid, and can switch the flow path of the fluid into three modes. Figures 50A to 58C An operation diagram related to the mode switching of the flow path is shown. The flow path switching device 1 of this embodiment is of the "one-side idling only type" similar to the second embodiment.

[0404] first, Figures 50A to 50C The "initial state" of the flow path switching device 1 of this embodiment is shown. Figure 50A Schematic diagram showing the engagement relationship between the through hole 14a of the rotating disk 14 and the rotating shaft 15. Figure 51A 、 Figure 52A 、 Figure 53A 、 Figure 54A 、 Figure 55A 、 Figure 56A 、 Figure 57A as well as Figure 58A Therefore Figure 50A Schematic diagram for the reference. Figure 50B Schematic diagram showing the change in the lift of the rotating shaft 15 relative to the rotating shaft angle. Figure 51B 、 Figure 52B 、 Figure 53B 、 Figure 54B 、 Figure 55B 、 Figure 56B 、 Figure 57B as well as Figure 58B Therefore Figure 50B Schematic diagram for the reference. Figure 50C The rotation position of the rotating disk 14 and the rotating communication passage 40 is indicated by Figure 21 The following is a top view of the reference. Figure 51C 、 Figure 52C 、 Figure 53C 、 Figure 54C 、 Figure 55C 、 Figure 56C 、 Figure 57C as well as Figure 58C Therefore Figure 50C The top view of the base.

[0405] In this "initial state", if Figure 50A As shown, the rotating shaft 15 is engaged with the inner wall of one side of the through hole 14a, and the shaft protrusion 15b falls into the disc recess 13e, thereby Figure 50B As shown, the rotating shaft 15 is relatively lowered. In addition, the rotating disk 14 and the rotating communication path 40 are configured as follows: Figure 50C The disk rotation angle at this time is "0°", and the switching state of the flow path is the same as "Mode A" in the third embodiment.

[0406] Next, changes from the "initial state" will be described in sequence. Figures 51A to 51C The "45° rotation state" is shown in which the rotation shaft 15 is rotated "45°" clockwise from the "initial state". In this state, as shown in FIG. Figure 51A As shown, the rotating shaft 15 idles "45°" clockwise from the "initial state" and engages with the inner wall of the other side of the through hole 14a, and the shaft protrusion 15b climbs up the disc protrusion 13g, thereby Figure 51B As shown in FIG, the rotation axis 15 is relatively raised. Figure 51C As shown, the disk rotation angle is maintained at "0°", and the flow path switching state of the rotating communication path 40 becomes "mode A" which is the same as the "initial state".

[0407] then, Figures 52A to 52C The figure shows a "90° rotation state" in which the rotation shaft 15 is further rotated "45°" clockwise from the "45° rotation state". In this state, as shown in FIG. Figure 52A As shown, the rotating shaft 15 rotates clockwise by 45 degrees together with the rotating disk 14, and the shaft protrusion 15b falls into the disk recess 13e, thereby Figure 52B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 52CAs shown, the disk rotation angle is "45°", and the flow path switching state of the rotating communication path 40 is the same as "Mode B" of the second embodiment. That is, between the "45° rotation state" and the "90° rotation state", the relative lowering of the rotating shaft 15 and the flow path switching are performed simultaneously.

[0408] As described above, in the present embodiment, the “switching angle” for switching the flow path is the same as the “idle rotation angle” of the rotating shaft 15 in the clockwise direction.

[0409] then, Figures 53A to 53C The rotation axis 15 is further rotated clockwise by 45° from the 90° rotation state to the 135° rotation state. Figure 53A As shown, the rotating shaft 15 rotates clockwise by 45 degrees together with the rotating disk 14, and the shaft protrusion 15b climbs up the disk protrusion 13g, thereby Figure 53B As shown in FIG, the rotation axis 15 is relatively raised. Figure 53C As shown, the disk rotation angle is "90°", and the flow path switching state of the rotating communication path 40 is the same as "Mode C" of the second embodiment. That is, between the "90° rotation state" and the "135° rotation state", the relative rise of the rotating shaft 15 and the flow path switching are performed simultaneously.

[0410] then, Figures 54A to 54C The rotating shaft 15 is shown as "returning to the 90° rotation state" by rotating "45°" counterclockwise from the "135° rotation state". In this state, as shown in FIG. Figure 54A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees and engages with the inner wall of one side of the through hole 14a, and the shaft protrusion 15b falls toward the disc recess 13e, thereby Figure 54B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 54C As shown, the disk rotation angle is maintained at "90°", and the flow path switching state of the rotary communication path 40 is "mode C".

[0411] then, Figures 55A to 55C The rotating shaft 15 is shown as a "45° rotation state" in which the rotating shaft 15 is rotated counterclockwise by "45°" from the "90° rotation state". In this state, as shown in FIG. Figure 55A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees together with the rotating disk 14, and the shaft protrusion 15b climbs up the disk protrusion 13g, thereby Figure 55B As shown in FIG, the rotation axis 15 is relatively raised. Figure 55C As shown, the disk rotation angle is "45°" and the flow path switching state of the rotating communication path 40 is "mode B." That is, between "returning to the 90° rotation state" and "returning to the 45° rotation state," the relative rise of the rotating shaft 15 and the flow path switching are performed simultaneously.

[0412] then, Figures 56A to 56C The figure shows the "90° rotation state again" in which the rotation shaft 15 is rotated "45°" clockwise from the "45° rotation state". In this state, as shown in FIG. Figure 56A As shown, the rotating shaft 15 idles "45°" clockwise and engages with the inner wall of the other side of the through hole 14a, and the shaft protrusion 15b falls toward the disc recess 13e, thereby Figure 56B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 56C As shown, the disk rotation angle is maintained at "45°", and the flow path switching state of the rotary communication path 40 is maintained at "mode B".

[0413] then, Figures 57A to 57C The figure shows that the rotation shaft 15 has rotated 45° counterclockwise from the "90° rotation state again" to the "45° rotation state". In this state, as shown in FIG. Figure 57A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees and engages with the inner wall of one side of the through hole 14a, and the shaft protrusion 15b climbs up the disc protrusion 13g, thereby Figure 57B As shown in FIG, the rotation axis 15 is relatively raised. Figure 57C As shown, the disk rotation angle is maintained at "45°", and the flow path switching state of the rotary communication path 40 is maintained at "mode B".

[0414] Then, Figures 58A to 58C The figure shows the "return to initial state" where the rotation shaft 15 rotates counterclockwise by "45°" from the "return to 45° rotation state". Figure 58A As shown, the rotating shaft 15 rotates counterclockwise by 45 degrees together with the rotating disk 14, and the shaft protrusion 15b falls toward the disk recess 13e, thereby Figure 58B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 58C As shown, the disk rotation angle returns to "0°," and the flow path switching state of the rotating communication path 40 is "Mode A," the same as the "initial state." That is, between "returning to the 45° rotation state" and "returning to the initial state," the relative lowering of the rotating shaft 15 and the switching of the flow paths occur simultaneously.

[0415] [Regarding the functions and effects of the flow path switching device]

[0416] The structure of the flow path switching device 1 of the present embodiment described above is different from that of the second embodiment, and the flow path of the fluid can be switched into three modes.

[0417] In this embodiment, if Figures 52A to 52C and Figures 58A to 58CAs shown in FIG. 1 , when the rotating disk 14 rotates, the rotating shaft 15 relatively descends (the fixed disk 13 and the upper housing 11 return to their original spacing). Therefore, it can be seen that when the rotating disk 14 rotates, the surface pressure applied to the sealing members 17 and 18 between the fixed disk 13 and the upper housing 11 decreases, thereby preventing the sealing members 17 and 18 from sliding, wearing, or falling off due to catching.

[0418] In this embodiment, in the "single-side idling type" structure where the flow path can be switched to three modes, the clockwise "idling angle" of the rotating shaft 15 and the "switching angle" of the flow path are set to the same "45°". Figures 52A to 52C and Figures 58A to 58C As shown, a configuration can be provided in which, when switching the flow path, the flow path is switched and the rotation shaft 15 is then relatively lowered after the rotation shaft 15 is relatively raised. This reduces the driving torque of the rotation shaft 15 (the driving torque of the drive unit 4), and enables miniaturization of the drive unit 4 (motor).

[0419] <Sixth embodiment>

[0420] Next, refer to Figures 59 to 83 The sixth embodiment will be described in detail.

[0421] [About the appearance of the flow path switching device]

[0422] exist Figure 59 In FIG. 1 , the upper surface side of the flow path switching device 8 of this embodiment is shown in a perspective view. Figure 60 In FIG, the bottom side of the flow path switching device 8 is shown in a perspective view. Figure 61 In FIG, the flow path switching device 8 is shown in a top view. Figure 62 , a top view shows a state in which the upper housing 11 and the drive unit 4 are removed from the flow path switching device 8. This embodiment differs from the above-described embodiments in the arrangement of the inflow flow path 20 of the upper housing 11, the arrangement of the outflow flow path 30 of the lower housing 12, the shape and arrangement of the rotating communication path 40 of the rotating disk 14, and the arrangement of the fixed communication path 50 of the fixed disk 13.

[0423] That is, Figure 59 、 Figure 61 As shown in FIG. 1 , in this embodiment, four inflow channels 20 ( 21 to 24 ) are arranged biasedly on approximately one half of the upper surface of the upper shell 11 , and adjacent inflow channels 20 ( 21 to 24 ) are arranged at equal angles ( 60° ) apart. Figure 60As shown, in this embodiment, the four outflow paths 30 (31 to 34) correspond to the four inflow paths 20 (21 to 24), and are biasedly arranged on approximately one side of the upper surface of the lower shell 12, and the adjacent outflow paths 30 (31 to 34) are arranged at equal angles (60°).

[0424] In addition, if Figure 62 As shown, the first through third rotating communication passages 41 through 43 of the rotating communication passages 40 provided on the rotating disk 14 have the same short, curved shape, with only the fourth rotating communication passage 44 having a long, curved shape. The upper sealing member 17 provided around each rotating communication passage 40 has a shape corresponding to the corresponding rotating communication passage 40 ( 41 through 44 ). The lower sealing member 18 is also identical to the upper sealing member 17.

[0425] In addition, in this embodiment, Figure 59 As shown, the flow path switching device 8 further includes a control unit 5 that controls the drive unit 4 to switch the flow path of the fluid. The control unit 5 stores a predetermined control program and controls the drive unit 4 to execute "flow path switching control" described later.

[0426] [About the sliding resistance mitigation structure]

[0427] The flow path switching device 8 of this embodiment is also different from the above-mentioned embodiments in the structure of the "sliding resistance mitigation structure". Figure 63 In the enlarged top view, Figure 62 The through hole 14a and the rotating shaft 15. Figure 64 In FIG, the rotating shaft 15 of this embodiment is shown in a perspective view. Figure 65 In the enlarged perspective view, Figure 64 The engaging structure K1 of the front end portion of the rotating shaft 15 is shown. Figure 66 In FIG, the fixed plate 13 of this embodiment is shown in a top view. Figure 67 In the enlarged perspective view, Figure 66 The engaged structure K2 of the fixing plate 13 is shown.

[0428] In this embodiment, the basic structure of the fixed disk 13, the rotating disk 14, the rotating shaft 15, the upper sealing member 17 and the lower sealing member 18 is similar to that of the fixed disk 13, the rotating disk 14, the rotating shaft 15, the upper sealing member 17 and the lower sealing member 18 of the above-mentioned embodiments, except for the arrangement and shape of the inflow flow path 20, the outflow flow path 30 and the rotating communication path 40. However, the structure differs in the following aspects. Figure 66As shown, the fixed connecting passages 50 (51 to 54) of the fixed disk 13 are arranged in a manner that matches the configuration of the outflow passage 30 of the lower shell 12, and are biased towards approximately one side of the upper surface of the fixed disk 13, and adjacent fixed connecting passages 50 (51 to 54) are arranged at equal angles (60°) apart.

[0429] In addition, this embodiment is different from the above-mentioned embodiments in the structure of the engaging structure K1 of the front end portion of the rotating shaft 15 and the engaged structure K2 of the fixed plate 13. Figure 64 、 Figure 65 As shown, the engaging structure K1 provided at the front end of the rotating shaft 15 differs from the above-mentioned embodiments and includes two circumferentially arranged shaft protrusions 15b and two shaft recesses 15c. The two shaft protrusions 15b are spaced equiangularly (180°) apart, with the recess 15c formed between these shaft protrusions 15b. Each shaft protrusion 15b has the same shape as the shaft protrusions 15b of the above-mentioned embodiments, but the circumferential length of the bottom of each shaft recess 15c is greater than that of the above-mentioned embodiments.

[0430] On the other hand, Figure 66 、 Figure 67 As shown, the disc protrusions 13g and the disc recesses 13e constituting the engaged structure K2 of the fixed disc 13 are arranged at equal angles (90°). Each disc protrusion 13g includes a side surface 13i inclined toward its circumferential direction (arrangement direction). The inclination angles of these two side surfaces 13i are set to be the same. These two side surfaces 13i are also the side surfaces of the disc recess 13e. In this embodiment, the top 13h of each disc protrusion 13g is a flat surface, and the two sides of the top 13h serve as inclined side surfaces 13i. In addition, the bottom of each disc recess 13e is a flat surface.

[0431] [About flow path mode switching]

[0432] The flow path switching device 8 of this embodiment has the above-described structure, and can switch the flow path of the fluid into three modes. Figures 68A to 80D An operation diagram related to switching of flow path modes is shown.

[0433] first, Figures 68A to 68D The "initial state" of the flow path switching device 8 of this embodiment is shown. Figure 68A 14a of the rotary disk 14 and the engagement relationship between the rotary shaft 15. Figure 69A 、 Figure 70A 、 Figure 71A 、 Figure 72A 、 Figure 73A 、 Figure 74A 、 Figure 75A 、 Figure 76A 、 Figure 77A 、 Figure 78A 、 Figure 79A as well as Figure 80A Therefore Figure 68A Schematic diagram for the reference. Figure 68B Schematic diagram showing the change in the lift of the rotating shaft 15 relative to the rotating shaft angle. Figure 69B 、 Figure 70B 、 Figure 71B 、 Figure 72B 、 Figure 73B 、 Figure 74B 、 Figure 75B 、 Figure 76B 、 Figure 77B 、 Figure 78B 、 Figure 79B as well as Figure 80B Therefore Figure 68B Schematic diagram for the reference. Figure 68C 14a and the rotational position of the rotating shaft 15, and the positional relationship between the disc protrusion 13g, the disc recess 13e, and the shaft protrusion 15b. Figure 69C 、 Figure 70C 、 Figure 71C 、 Figure 72C 、 Figure 73C 、 Figure 74C 、 Figure 75C 、 Figure 76C 、 Figure 77C 、 Figure 78C 、 Figure 79C as well as Figure 80C Therefore Figure 68C The top view of the base. Figure 68D The rotation position of the rotating disk 14 and the rotating communication passage 40 is indicated by Figure 62 The following is a top view of the reference. Figure 69D 、 Figure 70D 、 Figure 71D 、 Figure 72D 、 Figure 73D 、 Figure 74D 、 Figure 75D 、 Figure 76D 、 Figure 77D 、 Figure 78D 、 Figure 79D as well as Figure 80D Therefore Figure 68D The top view of the base.

[0434] In this "initial state", if Figure 68A As shown, the rotating shaft 15 is in a state where there are gaps 28 on both sides of the through hole 14a in the rotation direction. Figure 68B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 68CAs shown, the shaft protrusion 15b falls on the disc recess 13e. Moreover, the rotating disc 14 and the rotating communication passage 40 are configured as follows: Figure 68D The state shown is shown. At this time, the first rotating communication path 41 communicates with the first inflow path 21 and the first fixed communication path 51, the second rotating communication path 42 communicates with the second inflow path 22 and the second fixed communication path 52, the third rotating communication path 43 communicates with the third inflow path 23 and the third fixed communication path 53, and the fourth rotating communication path 44 communicates with the fourth inflow path 24 and the fourth fixed communication path 54. The disk rotation angle at this time is defined as "0°", and the switching state of the flow paths is defined as "Mode A".

[0435] Next, changes from the "initial state" will be described in sequence. Figures 69A to 69D The "30° rotation state" is shown in which the rotation shaft 15 is rotated "30°" clockwise from the "initial state". In this state, as shown in FIG. Figure 69A As shown, the rotating shaft 15 idles "30°" clockwise from the "initial state" and engages with the inner wall of one side of the through hole 14a, as shown in FIG. Figure 69B As shown in FIG, the rotation axis 15 is relatively raised. Figure 69C As shown, the shaft protrusion 15b climbs up the edge of one side of the top 13h of the disc protrusion 13g. Figure 69D As shown, the disk rotation angle is maintained at "0°", and the flow path switching state of the rotating communication path 40 becomes "mode A" which is the same as the "initial state".

[0436] As described above, in this embodiment, the "idle angle" for idling the rotating shaft 15 in the clockwise direction when the shaft protrusion 15b climbs up the disc protrusion 13g from the disc recess 13e is set to "30 degrees". Figure 68A In the “initial state” shown, the rotating shaft 15 has gaps 28 on both sides of the through hole 14 a in the rotation direction. Therefore, the rotating shaft 15 is a “double-sided idling type” capable of idling clockwise and counterclockwise.

[0437] then, Figures 70A to 70D The figure shows a "60° rotation state" where the rotation shaft 15 is further rotated "30°" clockwise from the "30° rotation state". In this state, as shown in FIG. Figure 70A As shown, the rotating shaft 15 and the rotating disk 14 rotate clockwise by "30°", as shown in FIG. Figure 70B As shown in FIG, the rotating shaft 15 rotates clockwise while maintaining a relatively raised state. Figure 70C As shown, the shaft protrusion 15b climbs up the other side edge of the top 13h of the disc protrusion 13g. Figure 70DAs shown, the rotating communication channel 40 rotates 30° clockwise. In this "60° rotation state," the first rotating communication channel 41 communicates with the second inflow channel 22 and the first fixed communication channel 51; the second rotating communication channel 42 communicates with the third inflow channel 23 and the second fixed communication channel 52; the third rotating communication channel 43 communicates with the fourth inflow channel 24 and the third fixed communication channel 53; and the fourth rotating communication channel 44 communicates with the first inflow channel 21 and the fourth fixed communication channel 54. The disk rotation angle at this time is 30°, and this channel switching state is defined as "Mode B." That is, between the "30° rotation state" and the "60° rotation state," the relative elevation of the rotating shaft 15 is maintained and the channel switching is performed simultaneously.

[0438] As described above, in this embodiment, the "switching angle" at which the rotary disk 14 rotates to switch the flow path of the flow path switching device 8 is set to "30°." That is, in this embodiment, the clockwise "idle angle" of the rotating shaft 15 and the "switching angle" of the rotary disk 14 for switching the flow path are both set to the same "30°."

[0439] then, Figures 71A to 71D The figure shows that the rotation shaft 15 has rotated counterclockwise by 30° from the 60° rotation state to the "return to 30° rotation state". Figure 71A As shown, the rotating shaft 15 rotates counterclockwise by 30°. Figure 71B As shown in FIG, the rotating shaft 15 rotates counterclockwise while maintaining a relatively raised state. Figure 71C As shown, the shaft protrusion 15b climbs up the edge of one side of the top 13h of the disc protrusion 13g. Figure 71D The rotating communication channel 40 stops at the same position as in the "60° rotation state" and the disk rotation angle remains at "30°". The flow channel switching state at this time is "mode B" which is the same as in the "60° rotation state".

[0440] then, Figures 72A to 72D The rotation shaft 15 is shown as being further rotated counterclockwise by 30° from the "returned 30° rotation state" to the "returned 0° rotation state". In this state, as shown in FIG. Figure 72A As shown, the rotating shaft 15 rotates counterclockwise by 30 degrees and engages with the inner wall of one side of the through hole 14a. Figure 72B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 72C As shown, the shaft protrusion 15b falls on the disc recess 13e. Figure 72D The rotating communication channel 40 stops at the same position as the "return to 30° rotation state", and the disk rotation angle remains at "30°". The flow channel switching state at this time is "mode B" which is the same as the "60° rotation state".

[0441] then, Figures 73A to 73D The figure shows the "return 30° rotation state" where the rotation shaft 15 has rotated "30°" clockwise from the "return 0° rotation state". In this state, as shown in FIG. Figure 73A As shown, the rotating shaft 15 idles "30°" clockwise from "returning to the 0° rotation state". Figure 73B As shown in FIG, the rotation axis 15 is relatively raised. Figure 73C As shown, the shaft protrusion 15b climbs up the edge of one side of the top 13h of the disc protrusion 13g. Figure 73D The rotating communication path 40 stops at the same position as the "return to 0° rotation state", and the disk rotation angle remains at "30°". The flow path switching state at this time is "mode B" which is the same as the "return to 0° rotation state".

[0442] then, Figures 74A to 74D The figure shows the "60° rotation state" in which the rotation shaft 15 is rotated clockwise by "30°" from the "30° rotation state". In this state, as shown in FIG. Figure 74A As shown, the rotating shaft 15 rotates clockwise 30 degrees and engages with the inner wall of the other side of the through hole 14a. Figure 74B As shown in FIG, the rotating shaft 15 rotates clockwise while maintaining a relatively raised state. Figure 74C As shown, the shaft protrusion 15b climbs up the other side edge of the top 13h of the disc protrusion 13g. Figure 74D As shown, the rotating communication path 40 stops at the same position as in the "30° rotation state again", and the disk rotation angle remains at 30°. The flow path switching state at this time is "mode B" which is the same as in the "30° rotation state again".

[0443] then, Figures 75A to 75D The figure shows the "90° rotation state" where the rotation shaft 15 is rotated "30°" clockwise from the "60° rotation state again". In this state, as shown in FIG. Figure 75A As shown, the rotating shaft 15 and the rotating disk 14 rotate clockwise by "30°", as shown in FIG. Figure 75B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 75C As shown in FIG. 1 , the shaft protrusion 15b falls from the top 13h of the disc protrusion 13g to the disc recess 13e. Figure 74DAs shown, the rotating communication channel 40 rotates clockwise by 30°. In this "90° rotation state," the first rotating communication channel 41 communicates with the second inflow channel 22 and the second fixed communication channel 52; the second rotating communication channel 42 communicates with the third inflow channel 23 and the third fixed communication channel 53; the third rotating communication channel 43 communicates with the fourth inflow channel 24 and the fourth fixed communication channel 54; and the fourth rotating communication channel 44 communicates with the first inflow channel 21 and the first fixed communication channel 51. The disk rotation angle at this point is 60°, and the channel switching state at this point is defined as "Mode C." That is, between the "further 60° rotation state" and the "90° rotation state," the relative lowering of the rotating shaft 15 and the channel switching occur simultaneously.

[0444] then, Figures 76A to 76D The rotation axis 15 is shown as "returning to the 60° rotation state" by rotating "30°" counterclockwise from the "90° rotation state". In this state, as shown in FIG. Figure 76A As shown, the rotating shaft 15 rotates counterclockwise by 30°. Figure 76B As shown in FIG, the rotation axis 15 is relatively raised. Figure 76C As shown, the shaft protrusion 15b climbs up the other side edge of the top 13h of the disc protrusion 13g. Figure 76D As shown, the rotating communication path 40 stops at the same position as in the "90° rotation state" and the disk rotation angle remains at "60°." The flow path switching state at this time is "mode C," which is the same as in the "90° rotation state."

[0445] then, Figures 77A to 77D The rotating shaft 15 is shown as rotating 30° counterclockwise from the 60° rotating state. Figure 77A As shown, the rotating shaft 15 rotates counterclockwise by 30 degrees and engages with the inner wall of one side of the through hole 14a. Figure 77B As shown in FIG, the rotating shaft 15 rotates counterclockwise while maintaining a relatively raised state. Figure 77C As shown, the shaft protrusion 15b climbs up the edge of one side of the top 13h of the disc protrusion 13g. Figure 77D As shown, the rotating communication path 40 stops at the same position as the "returned 60° rotation state", and the disk rotation angle remains at "60°". The flow path switching state at this time is "mode C" which is the same as the "returned 60° rotation state".

[0446] then, Figures 78A to 78D The rotation axis 15 is shown as rotating 30° counterclockwise from the "returning to 30° rotation state" to the "returning to 0° rotation state". Figure 78A As shown, the rotating shaft 15 and the rotating disk 14 rotate counterclockwise by 30 degrees. Figure 78BAs shown in FIG, the rotation axis 15 is relatively lowered. Figure 78C As shown, the shaft protrusion 15b falls on the disc recess 13e. Figure 78D As shown, the rotating communication passage 40 rotates counterclockwise by 30°. At this point, the disk rotation angle is 30°, and the flow path switching state is in "Mode B." That is, between "returning to the 30° rotation state" and "returning to the 0° rotation state," the relative lowering of the rotating shaft 15 and the switching of the flow paths occur simultaneously.

[0447] then, Figures 79A to 79D The rotation axis 15 is shown as a "-30° rotation state" in which the rotation axis 15 is rotated counterclockwise by "30°" from the "return to 0° rotation state". In this state, as shown in FIG. Figure 79A As shown, the rotating shaft 15 and the rotating disk 14 rotate counterclockwise by 30 degrees. Figure 79B As shown in FIG, the rotation axis 15 is relatively raised. Figure 79C As shown, the shaft protrusion 15b climbs up the disc protrusion 13g. Figure 79D As shown, the rotating communication channel 40 rotates counterclockwise by 30°. At this point, the disk rotation angle is 0°, and the flow path switching state is in "Mode A." That is, between the "0° rotation state" and the "-30° rotation state," the relative rise of the rotating shaft 15 and the switching of the flow paths occur simultaneously.

[0448] Then, Figures 80A to 80D The figure shows the "return to initial state" where the rotation shaft 15 rotates "30°" clockwise from the "-30° rotation state". Figure 80A As shown, the rotating shaft 15 rotates clockwise 30 degrees. Figure 80B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 80C As shown, the shaft protrusion 15b falls on the disc recess 13e. Figure 80D As shown, the rotating communication channel 40 stops at the same position as the "initial state" and the disk rotation angle is "0 degrees." The flow channel switching state at this time is "mode A" which is the same as the "initial state."

[0449] [About flow path switching control]

[0450] Next, the “flow path switching control” executed by the control unit 5 in the flow path switching device 8 of the present embodiment will be described. Figures 81 to 83 An example of the control content is shown in the flowchart.

[0451] When the process shifts to this control routine, the control unit 5 obtains the rotation angle (rotation axis angle) Sdeg of the rotation shaft 15 in step 100. Here, the housing 2 of the flow path switching device 8 is provided with a first angle sensor (not shown) for detecting the rotation axis angle Sdeg. The control unit 5 obtains the rotation axis angle Sdeg based on the detection value of this angle sensor.

[0452] Next, in step 110, the control unit 5 determines whether there is a request to switch the flow path. This switching request can be issued, for example, by a control device that controls the fluid circuit in which the flow path switching device 8 is installed. If the result of this determination is affirmative, the control unit 5 proceeds to step 120; if the result of this determination is negative, the control unit 5 proceeds to step 220.

[0453] In step 220 , the control unit 5 maintains the switching position of the flow path switching device 8 and returns the process to step 100 .

[0454] In step 120, the control unit 5 obtains the stop angle of the rotating disk 14 before switching (disk stop angle before switching) TSTA. Here, a second angle sensor (not shown) for detecting the disk rotation angle is provided in the housing 2 of the flow path switching device 8. The control unit 5 obtains the disk stop angle before switching TSTA based on the detection value of this angle sensor.

[0455] In step 130, the control unit 5 obtains the switching requested stop angle (switching requested disk stop angle) TSTO of the rotating disk 14. The switching requested disk stop angle TSTO can be issued by, for example, a control device that controls the fluid circuit in which the flow path switching device 8 is provided.

[0456] Next, in step 140 , the control unit 5 determines whether the pre-switching disk stop angle TSTA is “0 degrees,” or “0°.” If the determination result is affirmative, the control unit 5 proceeds to step 150 , and if not, proceeds to step 320 .

[0457] In step 150 , the control unit 5 determines whether the switching requested disk stop angle TSTO is “30 degrees” or “30°.” If the determination result is affirmative, the control unit 5 proceeds to step 160 , and if the determination result is negative, the control unit 5 proceeds to step 280 .

[0458] In step 160, the control unit 5 determines whether the reversal control flag XRC is "0." As will be described later, the control unit 5 sets this flag XRC to "1" when rotating the rotating shaft 15 counterclockwise, and to "0" when rotating the rotating shaft 15 clockwise. If the result of this determination is affirmative, the control unit 5 proceeds to step 170; if the result of this determination is negative, the control unit 5 proceeds to step 230.

[0459] In step 170 , the control unit 5 controls the driving unit 4 to rotate the rotating shaft 15 in the clockwise direction.

[0460] Next, in step 180 , the control unit 5 determines whether the rotation axis angle Sdeg is equal to or greater than 60 degrees. If the determination result is positive, the control unit 5 proceeds to step 190 , and if the determination result is negative, the control unit 5 returns to step 100 .

[0461] In step 190 , the control unit 5 stops the clockwise driving of the rotating shaft 15 by controlling the driving unit 4 .

[0462] Next, in step 200 , the control unit 5 controls the driving unit 4 to rotate the rotating shaft 15 counterclockwise.

[0463] Next, in step 210 , the control unit 5 sets the reversal control flag XRC to “1”.

[0464] Meanwhile, in step 230, which proceeds from step 160, the control unit 5 determines whether the rotation axis angle Sdeg is equal to or less than 0 degrees. If the determination result is affirmative, the control unit 5 proceeds to step 240. If the determination result is negative, the control unit 5 returns to step 100.

[0465] Next, in step 240 , the control unit 5 stops the counterclockwise driving of the rotating shaft 15 by controlling the driving unit 4 .

[0466] Next, in step 250 , the control unit 5 sets the pre-switching disk stop angle TSTA to “30 degrees”, that is, “30°”.

[0467] Next, in step 260 , the control unit 5 sets the reversal control flag XRC to “0”.

[0468] Next, in step 270 , the control unit 5 completes the switching of the flow path. In other words, the switching request is canceled, and the process returns to step 100 .

[0469] On the other hand, in step 280 which proceeds from step 150 , the control unit 5 controls the driving unit 4 to drive the rotating shaft 15 to rotate clockwise.

[0470] Next, in step 290 , the control unit 5 determines whether the rotation axis angle Sdeg is equal to or greater than 90 degrees. If the determination result is positive, the control unit 5 proceeds to step 300 , and if the determination result is negative, the control unit 5 returns to step 100 .

[0471] In step 300 , the control unit 5 stops the clockwise driving of the rotating shaft 15 by controlling the driving unit 4 .

[0472] Next, in step 310 , the control unit 5 sets the pre-switching disk stop angle TSTA to “60 degrees”, that is, “60°”, and transfers the process to step 260 .

[0473] Meanwhile, in step 320 , which proceeds from step 140 , the control unit 5 determines whether the pre-switching disk stop angle TSTA is 30 degrees. If the determination result is positive, the control unit 5 proceeds to step 330 , and if not, proceeds to step 470 .

[0474] Then, in step 330, which is a transition from step 320, the control unit 5 determines whether the requested disk stop angle TSTO is "0 degrees," or "0°." If the result of this determination is affirmative, the control unit 5 proceeds to step 340; if not, the control unit 5 proceeds to step 400.

[0475] In step 340 , the control unit 5 determines whether the reversal control flag XRC is “0.” If the determination result is affirmative, the control unit 5 moves the process to step 350 , and if the determination result is negative, the control unit 5 moves the process to step 440 .

[0476] In step 350 , the control unit 5 controls the driving unit 4 to rotate the rotating shaft 15 counterclockwise.

[0477] Next, in step 360 , the control unit 5 determines whether the rotation axis angle Sdeg is less than or equal to −30 degrees. If the determination result is positive, the control unit 5 proceeds to step 370 , and if the determination result is negative, the control unit 5 returns to step 100 .

[0478] In step 370 , the control unit 5 stops the counterclockwise driving of the rotating shaft 15 by controlling the driving unit 4 .

[0479] Next, in step 380 , the control unit 5 controls the driving unit 4 to rotate the rotating shaft 15 in the clockwise direction.

[0480] Next, in step 390 , the control unit 5 sets the reversal control flag XRC to “1” and returns the process to step 100 .

[0481] On the other hand, in step 400 which proceeds from step 330 , the control unit 5 controls the driving unit 4 to drive the rotating shaft 15 to rotate clockwise.

[0482] Next, in step 410 , the control unit 5 determines whether the rotation axis angle Sdeg is equal to or greater than 90 degrees. If the determination result is affirmative, the control unit 5 proceeds to step 420 , and if the determination result is negative, the control unit 5 returns to step 100 .

[0483] In step 420 , the control unit 5 stops the clockwise driving of the rotating shaft 15 by controlling the driving unit 4 .

[0484] Next, in step 430 , the control unit 5 sets the pre-switching disk stop angle TSTA to “60 degrees”, and transfers the process to step 260 .

[0485] Meanwhile, in step 440 , which proceeds from step 340 , the control unit 5 determines whether the rotation axis angle Sdeg is equal to or greater than 0 degrees. If the determination result is positive, the control unit 5 proceeds to step 450 , and if the determination result is negative, the control unit 5 returns to step 100 .

[0486] In step 450 , the control unit 5 stops the clockwise driving of the rotating shaft 15 by controlling the driving unit 4 .

[0487] Next, in step 460 , the control unit 5 sets the pre-switching disk stop angle TSTA to “0 degrees” and transfers the processing to step 260 .

[0488] Meanwhile, in step 470, which is followed by step 320, the control unit 5 determines whether the switching requested disk stop angle TSTO is "0 degrees." If the determination result is affirmative, the control unit 5 proceeds to step 480; otherwise, the control unit 5 proceeds to step 540.

[0489] In step 480 , the control unit 5 determines whether the reversal control flag XRC is “0.” If the determination result is affirmative, the control unit 5 moves the process to step 490 , and if the determination result is negative, the control unit 5 moves the process to step 580 .

[0490] In step 490 , the control unit 5 controls the driving unit 4 to rotate the rotating shaft 15 counterclockwise.

[0491] Next, in step 500 , the control unit 5 determines whether the rotation axis angle Sdeg is equal to or less than −30 degrees. If the determination result is affirmative, the control unit 5 proceeds to step 510 , and if the determination result is negative, the control unit 5 returns to step 100 .

[0492] In step 510 , the control unit 5 stops the counterclockwise driving of the rotating shaft 15 by controlling the driving unit 4 .

[0493] Next, in step 520 , the control unit 5 controls the driving unit 4 to rotate the rotating shaft 15 in the clockwise direction.

[0494] Next, in step 530 , the control unit 5 sets the reversal control flag XRC to “1” and returns the process to step 100 .

[0495] On the other hand, in step 540 which is transferred from step 470 , the control unit 5 controls the driving unit 4 to rotate the rotating shaft 15 counterclockwise.

[0496] Next, in step 550 , the control unit 5 determines whether the rotation axis angle Sdeg is equal to or less than “0 degrees.” If the determination result is affirmative, the control unit 5 proceeds to step 560 , and if the determination result is negative, the control unit 5 returns to step 100 .

[0497] In step 560 , the control unit 5 stops the counterclockwise driving of the rotating shaft 15 by controlling the driving unit 4 .

[0498] Next, in step 570 , the control unit 5 sets the pre-switching disk stop angle TSTA to “30 degrees” and transfers the processing to step 260 .

[0499] Meanwhile, in step 580 , which proceeds from step 480 , the control unit 5 determines whether the rotation axis angle Sdeg is equal to or greater than 0 degrees. If the determination result is positive, the control unit 5 proceeds to step 590 , and if the determination result is negative, the control unit 5 returns to step 100 .

[0500] In step 590 , the control unit 5 stops the clockwise driving of the rotating shaft 15 by controlling the driving unit 4 .

[0501] Next, in step 600 , the control unit 5 sets the pre-switching disk stop angle TSTA to “0 degrees” and transfers the process to step 260 .

[0502] In this embodiment, the drive unit 4 corresponds to an example of a "drive unit" of the disclosed technology, and the control unit 5 corresponds to an example of a "control unit" of the disclosed technology. Furthermore, the control unit 5 controls the drive unit 4 to rotate the rotating shaft 15 clockwise. After switching the flow path, the control unit 5 rotates the rotating shaft 15 counterclockwise (in the opposite direction) while the distal end of the rotating shaft 15 abuts the fixed disk 13, that is, the top 15e of the shaft protrusion 15b abuts the top 13h of the disk protrusion 13g. The control unit 5 then stops the rotation of the rotating shaft 15 while the distal end of the rotating shaft 15 engages the fixed disk 13, that is, the shaft recess 15c and the shaft protrusion 15b engage the disk protrusion 13g and the disk recess 13e.

[0503] [Regarding the functions and effects of the flow path switching device]

[0504] According to the structure of the flow path switching device 8 of this embodiment described above, the control unit 5 controls the drive unit 4 to rotate the rotating shaft 15. After switching the flow path, the top 15e of the shaft protrusion 15b contacts the top 13h of the disk protrusion 13g (which increases the gap between the upper housing 11 and the rotating disk 14, and the gap between the fixed disk 13 and the rotating disk 14). The rotating shaft 15 then rotates counterclockwise (in the opposite direction) and stops rotating the rotating shaft 15 when the shaft protrusion 15b and the shaft recess 15c engage the disk recess 13e and the disk protrusion 13g (which restores the gap between the upper housing 11 and the rotating disk 14, and the gap between the fixed disk 13 and the rotating disk 14). This ensures that the gaps between the upper housing 11 and the rotating disk 14, and the gaps between the fixed disk 13 and the rotating disk 14, return to their original states after the flow path is switched. Therefore, the sealing performance of the upper sealing member 17 and the lower sealing member 18 can be ensured.

[0505] In this embodiment, if Figures 75A to 75D and Figures 78A to 78D As shown in FIG. 1 , when the rotating disk 14 rotates, the rotating shaft 15 relatively descends (causing the fixed disk 13 and the upper shell 11 to return to their original spacing). Therefore, it can be seen that when the flow path is switched, the surface pressure applied to each sealing member 17, 18 between the fixed disk 13 and the upper shell 11 is reduced, which can prevent each sealing member 17, 18 from sliding wear or falling off due to hooking. In addition, in this embodiment, unlike the above-mentioned embodiments, Figures 70A to 70D As shown, the rotating disk 14 rotates while the rotating shaft 15 is kept relatively raised (maintaining a state in which the gap between the fixed disk 13 and the upper housing 11 is widened). Therefore, when the flow path is switched, the sealing members 17 and 18 can be more reliably prevented from sliding and wearing or falling off due to catching.

[0506] In this embodiment, in the "both-side idling type" structure where the flow path can be switched to three modes, the "idling angle" of the rotating shaft 15 and the "switching angle" of the flow path are set to the same "30°". Figures 70A to 70D 、 Figures 75A to 75D as well as Figures 78A to 78D As shown, a configuration can be provided in which, when switching the flow path, after relatively raising the rotating shaft 15, the flow path switching and the relative raising and holding or relative lowering of the rotating shaft 15 are simultaneously performed. This reduces the driving torque of the rotating shaft 15 (the driving torque of the driving unit 4), and enables miniaturization of the driving unit 4 (motor).

[0507] <Seventh embodiment>

[0508] Next, refer to Figures 84A to 90C The seventh embodiment will be described in detail.

[0509] [About flow path mode switching]

[0510] The flow path switching device 8 of this embodiment differs from the sixth embodiment in the switching mode of the fluid flow path. That is, in this embodiment, in the same "double-side idling type" as the sixth embodiment, the fluid flow path can be switched to two modes. Figures 84A to 90C An operation diagram related to switching of flow path modes is shown.

[0511] first, Figures 84A to 84C The "initial state" of the flow path switching device 8 of this embodiment is shown. Figure 84A Schematic diagram showing the engagement relationship between the through hole 14a of the rotating disk 14 and the rotating shaft 15. Figure 85A 、 Figure 86A 、 Figure 87A 、 Figure 88A 、 Figure 89A as well as Figure 90A Therefore Figure 84A The schematic diagram shall prevail.

[0512] Figure 84B Schematic diagram showing the change in the lift of the rotating shaft 15 relative to the rotating shaft angle. Figure 85B 、 Figure 86B 、 Figure 87B 、 Figure 88B 、 Figure 89B as well as Figure 90B Therefore Figure 84B Schematic diagram for the reference.

[0513] Figure 84C The rotation position of the rotating disk 14 and the rotating communication passage 40 is indicated by Figure 62 The following is a top view of the reference. Figure 85C 、 Figure 86C 、 Figure 87C 、 Figure 88C 、 Figure 89C as well as Figure 90C Therefore Figure 84C The top view of the base.

[0514] In this "initial state", if Figure 84A As shown, the rotating shaft 15 is in a state where there is a gap 28 on both sides of the through hole 14a in the rotation direction, and the shaft protrusion 15b falls on the disc recess 13e, so that Figure 84B As shown, the rotating shaft 15 is relatively lowered. In addition, the rotating disk 14 and the rotating communication path 40 are configured as follows: Figure 84C The state shown is shown. At this time, the first rotating communication path 41 communicates with the first inflow path 21 and the first fixed communication path 51, the second rotating communication path 42 communicates with the second inflow path 22 and the second fixed communication path 52, the third rotating communication path 43 communicates with the third inflow path 23 and the third fixed communication path 53, and the fourth rotating communication path 44 communicates with the fourth inflow path 24 and the fourth fixed communication path 54. The disk rotation angle at this time is defined as "0°", and this flow path switching state is defined as "Mode A".

[0515] Next, changes from the "initial state" will be described in sequence. Figures 85A to 85C The "30° rotation state" is shown in which the rotation shaft 15 is rotated "30°" clockwise from the "initial state". In this state, as shown in FIG. Figure 85A As shown, the rotating shaft 15 idles "30°" clockwise from the "initial state" and engages with the inner wall of the other side of the through hole 14a, and the shaft protrusion 15b climbs up the edge of one side of the top 13h of the disc protrusion 13g, thereby Figure 85B As shown in FIG, the rotation axis 15 is relatively raised. Figure 85C As shown, the disk rotation angle is maintained at “0°”, and the flow path switching state of the rotary communication path 40 is “mode A” which is the same as the “initial state”.

[0516] then, Figures 86A to 86C The figure shows a "60° rotation state" in which the rotation shaft 15 is rotated "30°" clockwise from the "30° rotation state". In this state, as shown in FIG. Figure 85A As shown, the rotating shaft 15 rotates clockwise by 30° together with the rotating disk 14, and the shaft protrusion 15b climbs onto the other side edge of the top 13h of the disk protrusion 13g, thereby Figure 86B As shown in FIG, the rotating shaft 15 rotates clockwise while maintaining a relatively raised state. Figure 86CAs shown, the rotating communication passage 40 rotates 30° clockwise. In this "30° rotation state," the first rotating communication passage 41 communicates with the second inflow passage 22 and the first fixed communication passage 51; the second rotating communication passage 42 communicates with the third inflow passage 23 and the second fixed communication passage 52; the third rotating communication passage 43 communicates with the fourth inflow passage 24 and the third fixed communication passage 53; and the fourth rotating communication passage 44 communicates with the first inflow passage 21 and the fourth fixed communication passage 54. The disk rotation angle at this point is 30°, and this passage switching state is defined as "Mode B."

[0517] As described above, in this embodiment, the "switching angle" at which the rotary disk 14 rotates to switch the flow path of the flow path switching device 8 is set to "30°." That is, in this embodiment, the clockwise "idle angle" of the rotating shaft 15 and the "switching angle" of the rotary disk 14 for switching the flow path are both set to the same "30°."

[0518] then, Figures 87A to 87C The figure shows that the rotation shaft 15 has rotated counterclockwise by 30° from the 60° rotation state to the "return to 30° rotation state". Figure 87A As shown in FIG. 1 , the rotating shaft 15 rotates counterclockwise by 30°, and the shaft protrusion 15b climbs onto the edge of the top 13h of the disc protrusion 13g, thereby Figure 87B As shown in FIG, the rotating shaft 15 rotates counterclockwise while maintaining a relatively raised state. Figure 87C As shown, the rotating communication path 40 stops at the same position as in the "60° rotation state" and the disk rotation angle remains at "30°." The flow path switching state at this time is "mode B," which is the same as in the "60° rotation state."

[0519] then, Figures 88A to 88C The rotation shaft 15 is shown as being further rotated counterclockwise by 30° from the "returned 30° rotation state" to the "returned 0° rotation state". In this state, as shown in FIG. Figure 88A As shown, the rotating shaft 15 rotates counterclockwise by 30° and engages with the inner wall of one side of the through hole 14a, and the shaft protrusion 15b falls into the disc recess 13e, thereby Figure 88B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 88C As shown, the rotating communication path 40 stops at the same position as the "30° rotation state", and the disk rotation angle remains at "30°". The flow path switching state at this time is "mode B" which is the same as the "30° rotation state".

[0520] then, Figures 89A to 89C The rotation axis 15 is shown as a "-30° rotation state" in which the rotation axis 15 is rotated counterclockwise by "30°" from the "return to 0° rotation state". In this state, as shown in FIG. Figure 89AAs shown, the rotating shaft 15 rotates counterclockwise by 30° together with the rotating disk 14, and the shaft protrusion 15b climbs up the disk protrusion 13g, thereby Figure 89B As shown in FIG, the rotation axis 15 is relatively raised. Figure 89C As shown, the rotating disk 14 and the rotating communication path 40 rotate counterclockwise by 30 degrees. The flow path switching state at this time is "mode A" which is the same as the "initial state".

[0521] Then, Figures 90A to 90C The figure shows the "return to initial state" where the rotation shaft 15 rotates "30°" clockwise from the "-30° rotation state". Figure 90A As shown, the rotating shaft 15 idles "30°" clockwise, and the shaft protrusion 15b falls on the disc recess 13e, so that Figure 90B As shown in FIG, the rotation axis 15 is relatively lowered. Figure 90C As shown, the rotating communication passage 40 returns to the same position as the "initial state" and the disk rotation angle becomes "0°." The flow passage switching state at this time is "mode A."

[0522] [Regarding the functions and effects of the flow path switching device]

[0523] According to the structure of the flow path switching device 8 of the present embodiment described above, it becomes a "double-side idling type" structure that can make the rotating shaft 15 idle in both sides of the rotation direction from the "initial state" and the flow path can be switched into two modes. In addition, although the mode of switching the flow path while the rotating shaft 15 is relatively lowered and the mode of switching the flow path while the rotating shaft 15 is relatively raised are mixed, it is possible to partially add a mode of switching the flow path while the rotating shaft 15 is kept relatively raised. That is, as Figures 86A to 86C As shown, the rotary disk 14 rotates while the rotary shaft 15 is kept relatively raised (while the gap between the fixed disk 13 and the upper housing 11 is kept widened). Therefore, it can be seen that when switching the flow path, the sealing members 17 and 18 can be prevented from sliding and wearing or falling off due to catching.

[0524] <Eighth embodiment>

[0525] Next, refer to Figures 91A to 95C The eighth embodiment will be described in detail.

[0526] [About the Engaging Structure and the Engaged Structure]

[0527] This embodiment is a variation of the third embodiment and differs from the third embodiment in the configuration of the engaging structure K1 and the engaged structure K2. In this embodiment, as in the third embodiment, the fluid flow path is configured to be switchable between two modes, and in the "initial state," the rotating shaft 15 is configured as a "one-side idling only" type capable of idling only in the clockwise direction.

[0528] Figures 91A to 91C The "initial state" of the flow path switching device 1 of this embodiment is shown. Figure 91A is with Figure 40A Same schematic diagram. Figure 92A 、 Figure 93A 、 Figure 94A as well as Figure 95A Therefore Figure 91A Schematic diagram for the reference. Figure 91B This is a schematic diagram showing the relationship between the engagement structure K1 (shaft protrusion 15b and shaft recess 15c) and the engaged structure K2 (disc recess 13e and disc protrusion 13g) of this embodiment. Figure 92B 、 Figure 93B 、 Figure 94B as well as Figure 95B Therefore Figure 91B As a reference diagram. Figures 91B to 95B As shown, in this embodiment, the top 15e of the shaft protrusion 15b and the top 13h of the disk protrusion 13g are respectively convex curved surfaces. In this embodiment, the inclination angle of the side surface 15d of the shaft protrusion 15b is set to be the same as the inclination angle of the side surface 13i of the disk protrusion 13g and the disk recess 13e. Figure 91C is with Figure 40B Same schematic diagram. Figure 92C 、 Figure 93C 、 Figure 94C as well as Figure 95C Therefore Figure 91C Schematic diagram for the reference.

[0529] exist Figures 91A to 91C In the “initial state” shown in Figure 91A As shown, the rotating shaft 15 is in a state where there is a gap 28 only in the clockwise direction in the through hole 14a. Figure 91B and Figure 91C As shown, the shaft protrusion 15b falls on the disc recess 13e, and the rotating shaft 15 is relatively lowered. Figure 91B As shown, the shaft protrusion 15b is inserted into and engaged with the disc recess 13e.

[0530] Next, changes from the "initial state" will be described in sequence. Figures 92A to 92C The "45° rotation state" is shown in which the rotation shaft 15 is rotated "45°" clockwise from the "initial state". In this state, as shown in FIG. Figure 92A As shown, the rotating shaft 15 idles "45°" clockwise from the "initial state" and engages with the inner wall of the other side of the through hole 14a, as shown in FIG. Figure 92B and Figure 92C As shown in FIG. 1 , the shaft protrusion 15b climbs onto the disc protrusion 13g, and the rotating shaft 15 rises relatively. Figure 92BAs shown, the top portion 15e of the shaft projection 15b climbs up and abuts against the top portion 13h of the disk projection 13g.

[0531] then, Figures 93A to 93C The figure shows a "90° rotation state" in which the rotation shaft 15 is further rotated "45°" clockwise from the "45° rotation state". In this state, as shown in FIG. Figure 93A As shown, the rotating shaft 15 and the rotating disk 14 rotate clockwise by "45°" from the "45° rotation state". Figure 93B and Figure 93C As shown, the shaft protrusion 15b falls on the disc recess 13e, and the rotating shaft 15 is relatively lowered. Figure 93B As shown, the shaft protrusion 15b is inserted into and engaged with the disc recess 13e.

[0532] then, Figures 94A to 94C The figure shows the "return to 45° rotation state" where the rotation shaft 15 rotates counterclockwise by 45° from the "90° rotation state". In this state, as shown in FIG. Figure 94A As shown, the rotating shaft 15 rotates counterclockwise 45 degrees from the "90 degree rotation state" and engages with the inner wall of one side of the through hole 14a, as shown in FIG. Figure 94B and Figure 94C As shown in FIG. 1 , the shaft protrusion 15b climbs onto the disc protrusion 13g, and the rotating shaft 15 rises relatively. Figure 94B As shown, the top portion 15e of the shaft projection 15b climbs up and abuts against the top portion 13h of the disk projection 13g.

[0533] then, Figures 95A to 95C The figure shows the "return to initial state" where the rotation shaft 15 rotates counterclockwise by "45°" from the "return to 45° rotation state". Figure 95A As shown, the rotating shaft 15 and the rotating disk 14 rotate counterclockwise by 45 degrees from the "return 45 degrees rotation state". Figure 95B and Figure 95C As shown, the shaft protrusion 15b falls on the disc recess 13e, and the rotating shaft 15 is relatively lowered. Figure 95B As shown, the shaft protrusion 15b is inserted into and engaged with the disc recess 13e.

[0534] [Regarding the functions and effects of the flow path switching device]

[0535] According to the structure of the flow path switching device 1 of the present embodiment described above, the top 15e of the shaft protrusion 15b and the top 13h of the disc protrusion 13g are respectively convex curved surfaces. Figure 92B and Figure 94BAs shown, when the rotating shaft 15 rises relatively and the top 15e of the shaft protrusion 15b climbs onto the top 13h of the disk protrusion 13g, they are stably engaged, thereby avoiding abrupt changes in relative rise and fall of the shaft protrusion 15b.

[0536] <Ninth embodiment>

[0537] Next, refer to Figures 96 to 102 The ninth embodiment will be described in detail.

[0538] [About the Engaging Structure and the Engaged Structure]

[0539] This embodiment is a modified example of the eighth embodiment, and is different from the eighth embodiment in the configurations of the engaging structure K1 and the engaged structure K2.

[0540] Figures 96 to 98 The flow path switching device 1 according to this embodiment, Figure 96 Schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotary shaft 15 is relatively lowered before the flow path is switched. Figure 97 Schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotating shaft 15 is relatively rising during flow path switching. Figure 98 Schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotating shaft 15 is relatively raised during flow path switching. Figures 96 to 98 As shown, in this embodiment, the top 15e of the shaft protrusion 15b and the top 13h of the disk protrusion 13g are convexly curved, while the bottom of the disk recess 13e is concavely curved. Furthermore, in this embodiment, the radius of the convexly curved surface of the top 15e of the shaft protrusion 15b is smaller than the radius of the concavely curved surface of the bottom of the disk recess 13e.

[0541] In contrast, Figures 99 to 101 Concerning the comparative example (eighth embodiment), Figure 99 Schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotary shaft 15 is relatively lowered before the flow path is switched. Figure 100 Schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotating shaft 15 is relatively rising during flow path switching. Figure 101 It is a schematic diagram showing the relationship between the engaging structure and the engaged structure when the rotary shaft 15 is relatively raised during flow path switching.

[0542] [Regarding the functions and effects of the flow path switching device]

[0543] According to the structure of the flow path switching device 1 of this embodiment described above, Figures 96 to 98 As shown, since the radius of the convex curved surface of the shaft protrusion 15b is smaller than the radius of the concave curved surface of the disc recess 13e, the rotation axis 15 is Figure 96 When the state of starts to rise relatively, that is, in the initial stage of flow path switching when the rotating shaft 15 starts to rotate in order to switch the flow path, Figure 99 Compared with the comparative example shown in FIG. 1 , the sliding resistance of the shaft protrusion 15b relative to the disc recess 13e is smaller. Figure 97 The situation shown and Figure 100 Compared with the situation shown in the figure, the sliding resistance of the two is roughly the same. Figure 98 The situation shown is similar to Figure 101 Compared to the situation shown in FIG. , in this case, the sliding resistance of the two is also approximately the same. Therefore, the driving torque of the rotating shaft 15 can be reduced at the initial stage of the flow path switching, and the relative rising angle of the rotating shaft 15 when it starts to rise can be reduced. Furthermore, since the relative rising angle of the rotating shaft 15 when it starts to rise can be reduced, the driving torque of the rotating shaft 15 can be suppressed.

[0544] exist Figure 102 In FIG, the relationship between the change in the rotation axis angle and the change in the driving torque is shown in a graph. Figure 102 In FIG, the bold line BL shows the present embodiment, and the dotted line DL shows the comparative example (eighth embodiment). Figure 102 As shown, it can be seen that in this embodiment, the driving torque when the rotation axis angle is "0°" is lower than the driving torque when the rotation axis angle is "0°" in the comparison example, and the driving torque when the rotation axis angle is "45°" is higher than the driving torque when the rotation axis angle is "45°" in the comparison example.

[0545] <10th embodiment>

[0546] Next, refer to Figures 103 to 113 The tenth embodiment will be described in detail.

[0547] [Questions Regarding the Ninth Implementation Method]

[0548] In the ninth embodiment described above, the top 15e of the shaft protrusion 15b and the top 13h of the disk protrusion 13g each have a convexly curved surface, while the bottom of the disk recess 13e has a concavely curved surface. Furthermore, the radius of the convexly curved surface of the top 15e of the shaft protrusion 15b is smaller than the radius of the concavely curved surface of the bottom of the disk recess 13e. Therefore, when the rotating shaft 15 is relatively lowered and the shaft protrusion 15b falls into the disk recess 13e, the top 15e of the shaft protrusion 15b and the bottom of the disk recess 13e contact each other at a single point. In this state, the contact surface pressure of each sealing member 17 and 18 relative to the upper housing 11 and the fixed disk 13 is at its highest, resulting in high stress acting at the contact point between the top 15e of the shaft protrusion 15b and the bottom of the disk recess 13e.

[0549] Therefore, when the rotating shaft 15 begins to rotate in order to relatively raise it from a relatively lowered state, the top 15e of the shaft protrusion 15b and the bottom of the disc recess 13e converge at a point and begin sliding, increasing sliding resistance and potentially accelerating wear between the shaft protrusion 15b and the disc recess 13e. As wear progresses on the top of the shaft protrusion 15b or the bottom of the disc recess 13e, the gap between the rotating disk 14 and the fixed disk 13 narrows, further increasing the relative contact pressure of the sealing members 17 and 18, and further increasing sliding resistance. As a result, the driving torque required to relatively raise the rotating shaft 15 and begin its rotation increases, requiring the drive unit 4 to provide a high output. Therefore, in this embodiment, to reduce the driving torque required to relatively raise the rotating shaft 15 from a relatively lowered state, the shapes of the engaging and engaged structures (the shaft protrusion 15b and the disc recess 13e) are modified as follows.

[0550] [About the Engaging Structure and the Engaged Structure]

[0551] exist Figures 103 to 113 Schematic diagrams show changes in the relationship between the engaging structure and the engaged structure when the rotary shaft 15 relatively rises and then relatively falls from a relatively lowered state during channel switching in the channel switching device 1 of the present embodiment.

[0552] Figure 103 The relationship between the engaging structure and the engaged structure in the relatively descending state before the flow path is switched is shown. Figure 104 Shown enlarged Figure 103 The connecting part. Figure 103 、 Figure 104 As shown, the disc concave portion 13e of this embodiment has a V-shaped, gently concave inclined surface (concave gently inclined surface) 13ea at its bottom, and has a steeply inclined surface 13ia that continues from the concave gently inclined surface 13ea to the disc protrusion 13g to form the side surface 13i of the disc protrusion 13g. In this embodiment, the top 13h of the disc protrusion 13g is a convex curved surface. In addition, the shaft protrusion 15b has a V-shaped, gently convex inclined surface (convex gently inclined surface) 15ea at its top 15e that matches and can be in surface contact with the concave gently inclined surface 13ea, and the side surface 15d of the shaft protrusion 15b that continues from the convex gently inclined surface 15ea has a steeply inclined surface 15da that matches and can be in surface contact with the steeply inclined surface 13ia of the side surface 13i of the disc protrusion 13g.

[0553] In the state before the flow path is switched, the contact surface pressure of each sealing component 17, 18 relative to the upper shell 11 and the fixed disk 13 is relatively high, and the contact surface pressure of the shaft protrusion 15b and the disk recess 13e is relatively high, but since the concave gentle inclined surface 13ea and the convex gentle inclined surface 15ea are in contact with each other, the stress of the higher contact surface pressure is not concentrated on one point but is dispersed.

[0554] then, Figure 105 The figure shows the relationship between the engaging structure and the engaged structure at the start of flow path switching (when the initial drive for relative ascending begins). During this initial drive, the convex gently inclined surface 15ea contacts the concave gently inclined surface 13ea, and the steeply inclined surface 15da of the shaft protrusion 15b contacts the steeply inclined surface 13ia of the disc protrusion 13g. At this time, the sealing members 17 and 18 experience high surface pressure. The contact surface pressure between the shaft protrusion 15b and the disc recess 13e is relatively high. However, since the concave gently inclined surface 13ea contacts the convex gently inclined surface 15ea, and the steeply inclined surface 13ia contacts the steeply inclined surface 15da, the stress of the high contact surface pressure is dispersed.

[0555] then, Figure 106 The figure shows the relationship between the engaging structure and the engaged structure during flow path switching (during relative ascent). During this relative ascent, the shaft 15 slides while the steeply inclined surface 15da of the shaft protrusion 15b contacts the steeply inclined surface 13ia of the disc recess 13e. At this point, the rotating shaft 15 begins to rise relative to the rotating disc 14 (the fixed disc 13 begins to descend), increasing the gap between the upper housing 11 and the fixed disc 13 relative to the rotating disc 14. Consequently, the contact surface pressure of the sealing members 17 and 18 decreases to a moderate level.

[0556] then, Figure 107 The relationship between the engaging structure and the engaged structure during the flow path switching (relatively rising) is also shown. During this relative rising, the shaft protrusion 15b slides with the convexly inclined surface 15ea in contact with the convexly curved top 13h of the disc protrusion 13g. Figure 108 Shown enlarged Figure 107 At this point, the rotating shaft 15 rises relative to the rotating disk 14 (and the fixed disk 13 descends), further increasing the gap between the upper housing 11 and the fixed disk 13 relative to the rotating disk 14. Consequently, the contact surface pressure of the sealing members 17 and 18 decreases further, reaching a lower surface pressure. This reduces the load on the top 13h of the disk protrusion 13g. Therefore, although stress concentrates on the contact between the shaft protrusion 15b and the top 13h of the disk protrusion 13g, this stress is reduced.

[0557] then, Figure 109 The relationship between the engaging structure and the engaged structure is shown in the middle of the flow path switching, immediately after the top 15e of the shaft protrusion 15b passes over the top 13h of the disk protrusion 13g (starts to descend relatively). Figure 110 Shown enlarged Figure 109 When the relative decline begins, Figure 107 、 Figure 108The same as the situation in which the shaft protrusion 15b slides while the convex and gently inclined surface 15ea of ​​the shaft protrusion 15b contacts the curved surface of the top 13h of the disk protrusion 13g. At this time, the rotating shaft 15 begins to descend relatively (the fixed disk 13 begins to rise), but since the gap between the upper shell 11 and the fixed disk 13 relative to the rotating disk 14 increases, the contact surface pressure of each sealing member 17, 18 decreases to a lower surface pressure. Therefore, Figure 107 、 Figure 108 In the same manner, although the contact stress of the shaft protrusion 15b with the top 13h of the disk protrusion 13g is concentrated, the stress is reduced.

[0558] then, Figure 111 The figure shows the relationship between the engaging structure and the engaged structure during flow path switching (midway relative descent). During this relative descent, the shaft 15 slides while the steeply inclined surface 15da of the shaft protrusion 15b contacts the steeply inclined surface 13ia of the disc recess 13e. At this point, the rotating shaft 15 is in the process of relative descent (midway while the fixed disc 13 is ascending), and the gap between the upper housing 11 and the fixed disc 13 relative to the rotating disc 14 is decreasing. Therefore, the contact surface pressure of the sealing members 17 and 18 begins to increase, reaching a moderate surface pressure.

[0559] then, Figure 112 The figure shows the relationship between the engaging structure and the engaged structure before the flow path switching is complete (before relative descent is complete). Before the relative descent is complete, the convex gently inclined surface 15ea is in contact with the concave gently inclined surface 13ea, and the steeply inclined surface 15da of the shaft protrusion 15b is in contact with the steeply inclined surface 13ia of the disc protrusion 13g. At this time, the sealing members 17 and 18 are in high surface pressure, and the contact surface pressure between the shaft protrusion 15b and the disc recess 13e is high. However, since the concave gently inclined surface 13ea is in surface contact with the convex gently inclined surface 15ea, and the steeply inclined surface 13ia is in contact with the steeply inclined surface 15da, the stress of the high contact surface pressure is dispersed.

[0560] then, Figure 113 The figure shows the relationship between the engaging structure and the engaged structure when the flow path switching is completed (relative descent completion phase). When the relative descent is completed, the surface pressure of each sealing member 17, 18 further increases, and the contact surface pressure between the shaft protrusion 15b and the disc recess 13e also increases. However, since the concave and gently inclined surfaces 13ea and the convex and gently inclined surfaces 15ea are in contact with each other, the stress of the high contact surface pressure is dispersed.

[0561] [Regarding the functions and effects of the flow path switching device]

[0562] According to the structure of the flow path switching device 1 of this embodiment described above, before the flow path is switched, the shaft protrusion 15b of the shaft 15 engages with the disc recess 13e of the fixed disc 13, bringing the convex-sloping surface 15ea of ​​the shaft protrusion 15b into contact with the concave-sloping surface 13ea of ​​the disc recess 13e. When the shaft 15 begins rotating from this position to switch the flow path, the shaft protrusion 15b begins sliding relative to the disc recess 13e by gently tilting due to the contact between the concave-sloping surface 13ea and the convex-sloping surface 15ea. Furthermore, the shaft protrusion 15b slides due to the surface contact between the convex-sloping surface 15ea and the concave-sloping surface 13ea. Furthermore, as the shaft 15 rotates further, the disc recess 13e and the shaft protrusion 15b transition from contact between the concave-sloping surface 13ea and the convex-sloping surface 15ea to contact between the steeply inclined surfaces 13ia and 15da, allowing them to slide due to the surface contact. Therefore, when the rotating shaft 15 starts to rotate from the state where the shaft protrusion 15b is engaged with the disc recess 13e, the driving torque required to rotate the rotating shaft 15 can be reduced, and wear of the shaft protrusion 15b and the disc recess 13e can be suppressed. In addition, by reducing the driving torque, the driving unit 4 can be miniaturized.

[0563] <11th embodiment>

[0564] Next, refer to Figure 114 、 Figure 115 The eleventh embodiment will be described in detail.

[0565] [About the Engaging Structure and the Engaged Structure]

[0566] This embodiment is a modified example of the tenth embodiment, and is different from the tenth embodiment in the structure of the engaging structure and the engaged structure. Figure 114 In, by Figure 107 The schematic diagram based on is a diagram showing the relationship between the engaging structure and the engaged structure in the middle of the flow path switching (in the middle of the relative rise of the rotating shaft 15) of the flow path switching device 1 of this embodiment. Figure 115 In the enlarged schematic diagram Figure 114 The connecting part in .

[0567] like Figure 114 、 Figure 115 As shown, in this embodiment, the top 13h of the disc protrusion 13g is not a convexly curved surface, but rather a convexly gently inclined surface 13ha in the same V-shaped pattern as the top 15e of the shaft protrusion 15b. Therefore, during this relative ascent, the convexly gently inclined surface 15ea of ​​the shaft protrusion 15b and the convexly gently inclined surface 13ha of the top 13h of the disc protrusion 13g slide while in contact with each other. Consequently, compared to the tenth embodiment, the contact stress between the shaft protrusion 15b and the disc protrusion 13g can be mitigated, thereby suppressing wear on both the shaft protrusion 15b and the disc protrusion 13g.

[0568] <Other Implementation Methods>

[0569] In addition, the disclosed technology is not limited to the above-described embodiments, and can be implemented by appropriately changing parts of the structure without departing from the gist of the disclosed technology.

[0570] (1) In the first embodiment, the flow path switching device 1 is configured as an eight-way valve. However, the present invention is not limited thereto and may be configured as a three-way valve, a four-way valve, a six-way valve, or other multi-way valve. Therefore, the rotating disk 14 only needs to have at least one rotating communication path 40, and the fixed disk 13 only needs to have a plurality of fixed communication paths 50.

[0571] (2) The “sliding resistance mitigation structure” in the first embodiment is an example and is not limited to the engaging structure K1 and the engaged structure K2 described above.

[0572] (3) In the above-mentioned second embodiment, only the top 15e of the shaft protrusion 15b is formed as a convex curved surface, but it is also possible to form only the top 13h of the disk protrusion 13g as a convex curved surface, or to form both the top 15e of the shaft protrusion 15b and the top 13h of the disk protrusion 13g as convex curved surfaces.

[0573] (4) In the second embodiment described above, the top portion 15e of the shaft protrusion 15b is formed as a convex curved surface, but the top portion may also be formed as a flat surface.

[0574] Industrial applicability

[0575] The disclosed technology can be used, for example, to switch the flow path of a fluid in a fluid circuit in which a fluid such as a refrigerant flows.

[0576] Description of Reference Numerals

[0577] 1. Flow path switching device; 2. Housing; 3. Valve core part; 4. Drive part (drive unit); 5. Control part (control unit); 8. Flow path switching device; 13. Fixed disk; 13e. Disk recess; 13ea. Concave and gently inclined surface; 13g. Disk protrusion; 13h. Top; 13ha. Concave and gently inclined surface; 13i. Side part; 13ia. Steeply inclined surface; 14. Rotating disk (driving disk); 15. Rotating shaft; 15a. Front end; 15b. Shaft protrusion; 15c. Shaft recess; 15d. Side part; 15da. Steeply inclined surface; 15e. Top; 15ea. Concave and gently inclined surface; 17. Upper sealing member; 18. Lower sealing member; 20. Inflow path (connecting path); 28. Gap; 30. Outflow path (connecting path); 40. Rotating connecting path (connecting path); 50. Fixed connecting path (connecting path); X, axial direction.

Claims

1. A flow path switching device, comprising: a housing; and a valve core portion, which is arranged inside the housing, The valve core portion comprises: Fixed plate; A driving disk, which is stacked on the fixed disk and rotates relative to the fixed disk; and a rotating shaft for rotating the driving disc, The housing, the fixed plate, and the driving plate each have a plurality of communication paths, and are configured to be connected through the communication paths as the driving plate rotates, thereby forming a flow path for the fluid. The flow path is provided with a sealing member at least between the fixed disk and the driving disk to suppress leakage of the fluid. The flow path switching device is characterized in that: The front end of the rotating shaft is configured to be able to abut and engage with the fixed plate. The fixed plate is configured to be abutted and engaged with the front end portion of the rotating shaft as the fixed plate rotates, so that the fixed plate can reciprocate in the axial direction.

2. The flow path switching device according to claim 1, characterized in that: The front end portion of the rotating shaft includes a shaft protrusion and a shaft concave portion arranged in a circumferential direction. The fixed plate includes a plate concave portion and a plate convex portion capable of abutting and engaging with the shaft convex portion and the shaft concave portion, The shaft protrusion and the shaft recess and the disk recess and the disk protrusion include side surfaces inclined in the circumferential direction.

3. The flow path switching device according to claim 2, characterized in that: The top of at least one of the shaft protrusion and the disk protrusion is formed as a flat surface or a convex curved surface, and the bottom of at least one of the disk concave portion and the shaft concave portion is formed as a flat surface or a concave curved surface.

4. The flow path switching device according to claim 2, characterized in that: The disc concave portion has a V-shaped concave gently inclined surface at its bottom, and has a steeply inclined surface that continues from the concave gently inclined surface to the disc convex portion to form the side surface of the disc convex portion. The shaft protrusion has a V-shaped convex gently inclined surface at its top that matches the concave gently inclined surface, and the side surface of the shaft protrusion continuous from the convex gently inclined surface has a steep inclined surface that matches the steep inclined surface of the side surface of the disk protrusion.

5. The flow path switching device according to any one of claims 1 to 4, characterized in that: The driving plate and the rotating shaft are connected so as to be relatively movable in a rotational direction and an axial direction.

6. The flow path switching device according to claim 5, characterized in that: A connection portion between the rotating shaft and the driving plate has a gap in a rotating direction.

7. The flow path switching device according to claim 6, characterized in that: An idling angle at which the rotating shaft idly rotates in the gap when the front end portion of the rotating shaft transitions from the engaged state with the fixed plate to the abutted state with the fixed plate and a switching angle at which the driving plate is rotated to switch the flow path are set to be the same angle.

8. The flow path switching device according to claim 7, characterized in that: The flow path switching device also has: a driving unit for rotationally driving the rotating shaft; and a control unit for controlling the drive unit, The control unit rotates the rotating shaft by controlling the driving unit, and after switching the flow path while the front end portion of the rotating shaft is in contact with the fixed disk, rotates the rotating shaft in the opposite direction, and stops the rotation of the rotating shaft while the front end portion of the rotating shaft is in engagement with the fixed disk.

Images