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CN-116261635-B - Valve device

CN116261635BCN 116261635 BCN116261635 BCN 116261635BCN-116261635-B

Abstract

The valve device is provided with a case (10), a flow hole forming unit (20), a rotor (30), and a driving unit (40). The case (10) has a flow path through which a fluid flows. The flow hole forming part (20) is fixed in the flow path of the box body (10), and is provided with a plurality of flow holes (21-24) for the fluid to pass through and a separation part (25) arranged between the plurality of flow holes (21-24). The rotor (30) is provided rotatably about a predetermined rotation axis (Ax), and has a flow path opening (31) and a closing portion (32). Here, a dummy circle (C) is defined which is centered on and perpendicular to the rotation axis (Ax) of the rotor (30). The partition (25) of the flow hole forming section (20) has parallel sections (26) formed in parallel along the radial direction of the dummy circle (C), and a gradual change section (27) provided at a position radially outside the parallel sections (26) and formed so as to gradually widen in width in the circumferential direction as going radially outside.

Inventors

  • MIZUNUMA TAKEHITO
  • Kimura Xiangtai
  • SANO RYO
  • Kota Takata

Assignees

  • 株式会社电装

Dates

Publication Date
20260505
Application Date
20210910
Priority Date
20201002

Claims (7)

  1. 1. A valve device, comprising: a case having a flow path through which a fluid flows; A flow hole forming part fixed in the flow path of the box body and provided with a plurality of flow holes for passing the fluid and a separation part arranged between the flow holes A rotor provided in the flow path of the case so as to be rotatable about a predetermined rotation axis, the rotor having a flow path opening communicating with a predetermined one of the plurality of flow holes provided in the flow hole forming portion according to a rotation angle, and a blocking portion blocking the other flow holes except the predetermined one of the plurality of flow holes, and A driving unit that outputs a torque for rotating the rotor, When a dummy circle centered on and perpendicular to the rotation axis of the rotor is defined, A portion of the opening edge of the flow path opening portion of the rotor facing the circumferential direction of the dummy circle is formed along a dummy line extending in the radial direction of the dummy circle, The partition portion provided in the flow hole forming portion has a parallel portion formed in parallel with the radial direction of the dummy circle, and a gradual change portion provided at a position radially outward of the parallel portion, and formed so as to gradually widen in width in the circumferential direction as going radially outward.
  2. 2. A valve device according to claim 1, wherein, A first edge portion facing the circumferential direction of the dummy circle among the outer edges of the parallel portions is formed in parallel along a predetermined first dummy line extending in the radial direction of the dummy circle at a predetermined distance from the inner side of the flow hole, A second edge portion facing the circumferential direction of the dummy circle, of the outer edges of the gradation portions, is formed along a second dummy line that is inclined from the first dummy line to the inside of the flow hole by a predetermined angle and extends in the radial direction of the dummy circle.
  3. 3. A valve device according to claim 2, wherein, The external angle formed by the first edge part and the second edge part is in the range of 5-10 degrees.
  4. 4. A valve device according to claim 2, wherein, The connection portion between the first edge portion and the second edge portion is provided in a central region among regions obtained by trisecting the length of the partition portion in the radial direction.
  5. 5. A valve device according to any one of claim 1 to 4, wherein, The driving unit may switch between two or more operation modes in which a predetermined flow hole communicates with the flow path opening and the flow hole other than the predetermined flow hole is blocked from the flow path opening.
  6. 6. A valve device according to any one of claim 1 to 4, wherein, The plurality of flow holes and the plurality of partition portions are alternately arranged in the circumferential direction of the dummy circle over the entire circumference of the flow hole forming portion.
  7. 7. A valve device according to any one of claim 1 to 4, wherein, The valve device further includes a biasing member provided around the rotation axis of the rotor, one end side of the biasing member being locked to the case or a member fixed to the case, and the other end side of the biasing member being locked to the rotor or a member fixed to the rotor, the biasing member biasing the rotor with respect to the case in one direction in the circumferential direction of the dummy circle.

Description

Valve device Related application The present application is based on japanese patent application No. 2020-167777, filed on 10/2/2020, and the description thereof is incorporated herein by reference. Technical Field The present disclosure relates to valve devices. Background Conventionally, there is known a valve device used in a fluid circulation system in which a fluid circulates, for switching a flow path of the fluid flowing in the system, adjusting a flow rate, and the like. The valve device described in patent document 1 includes a flow hole forming portion fixed in a cylindrical case, a rotor rotatably provided in the case, a driving portion for rotating the rotor, a shaft for connecting the rotor and the driving portion, a connecting member, and the like. The flow hole forming portion has two flow holes through which the fluid passes, and a partition portion that separates the two flow holes from each other. On the other hand, the rotor has one flow path opening portion through which the fluid passes and a closing portion in sliding contact with the flow hole forming portion. In patent document 1, the flow hole forming portion is referred to as a first valve, and the rotor is referred to as a second valve. When torque generated by the driving unit is transmitted to the rotor via the shaft and the coupling member, the rotor rotates about the rotation axis of the shaft. Thus, one of the two flow holes of the flow hole forming portion communicates with the flow path opening portion of the rotor, and the other flow hole is closed by the closing portion of the rotor. Thus, the fluid flowing in the case flows through one of the two flow holes provided in the flow hole forming portion, and the flow to the other flow hole is blocked. Prior art literature Patent literature Patent document 1 International publication No. 2017/211311 Disclosure of Invention However, in the valve device described in patent document 1, minute clearances for assembly are provided in the gear mechanism in the driving portion, the fitting portion of the output gear of the driving portion with the shaft, the fitting portion of the shaft with the coupling member, and the fitting portion of the coupling member with the rotor, respectively. Therefore, when torque is transmitted from the driving unit to the rotor to drive the rotor in the forward and reverse directions, there is a case where the rotation angle of the rotor varies from the rotation angle of the driving unit. Therefore, in this valve device, when the rotor is moved to a predetermined position to cause fluid to flow into one of the two flow holes provided in the flow hole forming portion and to block the other flow hole, there is a problem that fluid leaks unexpectedly into the other flow hole due to a deviation in the stop position of the rotor. In order to solve this problem, for example, it is considered to enlarge the width of the partition portion provided in the flow hole forming portion so that the fluid does not leak into the other flow hole even when the stop position of the rotor is deviated. However, in this case, the flow passage area of the flow passage provided in the flow passage forming portion is reduced, and the pressure loss of the fluid flowing through the flow passage is increased. An object of the present disclosure is to provide a valve device capable of improving sealability of a flow hole through which fluid does not flow out of a plurality of flow holes, and capable of suppressing an increase in pressure loss of fluid flowing through the flow hole, in response to a deviation in a stop position of a rotor. According to one aspect of the present disclosure, a valve device includes a housing, a flow hole forming portion, a rotor, and a driving portion. The tank has a flow path through which a fluid flows. The flow hole forming portion is fixed in the flow path of the case and has a plurality of flow holes through which the fluid passes and a partition portion provided between the plurality of flow holes. The rotor is provided in the flow path of the case so as to be rotatable about a predetermined rotation axis, and has a flow path opening communicating with a predetermined flow path hole of the plurality of flow paths provided in the flow path forming portion according to the rotation angle, and a blocking portion blocking other flow paths except the predetermined flow path hole of the plurality of flow paths. The driving unit outputs torque for rotating the rotor. Here, a dummy circle is defined which is perpendicular to the rotation axis of the rotor and is centered on the rotation axis. At this time, a portion of the opening edge of the flow path opening portion of the rotor facing the circumferential direction of the dummy circle is formed along a dummy line extending in the radial direction of the dummy circle. On the other hand, the partition portion included in the flow hole forming portion includes a parallel portion formed in parallel with t