JP2019211008A - Flow passage selector valve - Google Patents

Abstract

To obtain a flow passage selector valve comprising a simple structure, and having a quick and sure flow passage changeover function.SOLUTION: A flow passage selector valve B comprises: a case C; a fluid supply part 1 for supplying a fluid W to an internal space of the case C; a valve body V1 having a first circulation part R1 for making the fluid W flow to a specified circulation destination, and a first opposing face F1 at which the first circulation part R1 is opened; a second opposing face F2 of the case C opposing to the first opposing face F1; an energization member P1 for pressing the first opposing face F1 to the second opposing face F2; a drive part K for rotationally driving the valve body V1; and a plurality of second circulation parts arranged at the second opposing face F2. A fluid supply part 1 includes: a recess 4 which is opened at a space on a side opposite to the first opposing face F1 with respect to the valve body V1 out of the internal space, and in which the first circulation part R1 is opened at the second opposing face F2 in a part of the first opposing face F1 to oppose to the second circulation part; and a communication part 5 formed at a part of the recess 4 in a view orthogonal to the first opposing face F1, and making the recess 4 and the internal space communicate with each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flow path switching valve that switches a flow destination of a flowing fluid using a rotatable switching member.

  Conventionally, as such a flow path switching valve, for example, there is one described in Patent Document 1 below.

  The flow path switching valve includes a rotatable valve body in a flow path switching chamber into which liquid flows, and presses the valve body against a flat inner wall surface of the flow path switching chamber to form a plurality of Any one of the liquid outlet ports is selectively communicated.

  The valve body has a portion that shields each liquid outlet port according to the rotational phase of the valve body, and a cutout hole that communicates with the specific liquid outlet port and allows the liquid in the flow path switching chamber to flow to the liquid outlet port. Is provided. The notch hole is formed by passing through a space having the same cross-sectional shape from the upper surface to the lower surface of the plate-like valve body.

  Further, the valve body is pressed against the inner wall surface by a disc spring, and is configured such that no gap is generated between the valve body and the inner wall surface.

  Furthermore, the inner wall surface is formed with an inclined protrusion whose height sequentially changes along the rotation direction of the valve body. When the valve element rides on the protrusion at a predetermined rotational phase, the valve element floats from the inner wall surface, and liquid can be supplied to all the liquid outlet ports.

  The related art has such a relatively simple structure, so that it is possible to individually select the liquid distribution destination, and depending on the rotation phase of the valve body, the liquid can be supplied to all the liquid outlet ports. It is possible to supply.

JP 2000-130613 A

  In the above prior art, in order to surely switch the liquid distribution destination, it is necessary to appropriately press the valve body against the inner wall surface and to partition the adjacent liquid outlet ports with certainty.

  However, paying attention to the structure of the valve body, first, the notch hole is formed in the same cross-sectional shape from the upper surface to the lower surface of the plate-like valve body. Further, the valve body is formed with an annular through groove, and when the valve body is in a predetermined rotational phase, the protrusion does not enter the through groove and the valve body does not ride on the protrusion.

  Although this valve body is urged to the liquid outlet port by the disc spring, if this flow path switching valve is installed in an environment with vibration, the urging force of the disc spring is insufficient and the liquid outlet port The partition effect may be impaired.

  On the other hand, although the liquid present in the flow path switching chamber exerts a predetermined pressure on the valve body, the valve body has a notch hole and an annular groove so that the pressure of the liquid can be fully utilized. It is not. For this reason, the switching operation of the flow path by the valve body becomes slow, and the liquid may flow through the unexpected flow path.

  As described above, some conventional flow path switching valves do not fully exhibit the flow path switching effect of the valve element, and there is still room for improvement. For these reasons, there has been a demand for a flow path switching valve that has a simple structure and has a rapid and reliable flow path switching function.

(Feature configuration)
The characteristic configuration of the flow path switching valve according to the present invention is:
Case and
A fluid supply unit provided in the case and configured to supply a fluid to the internal space of the case;
A valve body that is rotatably provided in the internal space, and has a first flow portion that flows the fluid flowing in from the fluid supply portion to a specific flow destination, and a first facing surface that opens the first flow portion;
A second facing surface provided in the case in a state facing the first facing surface;
An urging member that presses the first opposing surface of the valve body against the second opposing surface across the case and the valve body,
A drive unit for rotationally driving the valve body;
A plurality of second flow portions provided on the second facing surface, wherein the communication state with the first flow portion is switched according to the rotational phase of the valve body;
A plurality of fluid ejection portions communicating with each of the plurality of second circulation portions and ejecting the fluid to the specific circulation destination;
The fluid supply unit is provided in a state of opening to a space on the opposite side of the first facing surface with respect to the valve body in the internal space,
A concave portion formed at a position where the first circulation portion opens toward the second opposed surface in a partial region of the first opposed surface and can face each of the plurality of second flow portions; A communication portion that is formed in a partial region of the concave portion in a direction orthogonal to the first facing surface and communicates the concave portion with the internal space.

(effect)
Like this structure, a fluid supply part is connected to the opposite side of a 1st opposing surface with respect to a valve body among internal spaces, A valve body is made into the 1st opposing surface side with the fluid which flowed into internal space. Pressed. That is, the first opposing surface of the valve body is pressed against the second opposing surface of the case. As a result, the fluid can be discharged only to the second circulation part communicated according to the rotational phase of the valve body, and the leakage of the fluid to the other second circulation part is reliably prevented. With this configuration, it is possible to improve the certainty of the switching function of the flow path by using the pressure of the fluid, and it is possible to obtain a flow path switching valve excellent in operation reliability while simplifying the device structure.

  Further, in the present configuration, as the first flow part formed in the valve body, a concave part facing the second flow part, and a communication part formed in a part of the concave part so that fluid flows from the internal space to the concave part, It has. That is, while ensuring the area of the recessed part communicating with the second flow part appropriately, the cross-sectional area of the communication part is configured to be small, and the valve body is located on the side opposite to the first facing surface and facing the internal space. Wide area is secured.

  As a result, the valve body is strongly pressed against the second facing surface by the fluid supplied to the internal space. As a result, one of the plurality of second circulation portions formed on the second facing surface is reliably partitioned from the other second circulation portions, and the fluid can be supplied only to the intended distribution destination.

(Feature configuration)
In the flow path switching valve according to the present invention, the valve body is urged in a direction away from the second facing surface across the case and the valve body, and fluid is supplied from the fluid supply unit to the internal space. It is convenient that a second urging member for bringing the first facing surface into a non-contact state with respect to another object is provided in a state in which is not supplied.

(effect)
By providing such a second urging member, the valve body can be separated from the second facing surface in a state where the fluid is not supplied to the internal space. In this case, the driving resistance of the valve body is reduced, and the phase of the valve body can be quickly changed with a small force. Therefore, it is possible to obtain a rational flow path switching valve such that the configuration of the drive unit is simplified and the entire apparatus can be reduced in weight.

  In addition, when the valve element is separated from the second facing surface, the fluid that has already been supplied to the second circulation portion can be pulled back through the internal space. Therefore, it is possible to prevent the fluid from leaking at the distribution destination after the supply of the fluid is stopped, or to prevent problems such as freezing of the fluid inside the supply pipe from the second circulation portion.

(Feature configuration)
The flow path switching valve according to the present invention may include a seal member that abuts against the first facing surface and the second facing surface and partitions the plurality of second flow portions.

(effect)
Providing a seal member that contacts the first facing surface and the second facing surface as in this configuration to reliably partition the second flow portions can prevent fluid from flowing to unintended flow destinations. it can. Therefore, a flow path switching valve with high operational reliability can be obtained.

(Feature configuration)
In the flow path switching valve according to the present invention, the valve body has a cylindrical side surface centered on the rotation axis of the drive unit, and the case includes a cylindrical inner wall surrounding the side surface, And a second seal member between the inner wall and the inner wall.

(effect)
By providing such a second seal member, it is possible to reliably prevent the fluid in the internal space of the case from leaking to the second facing surface side through a gap between the valve body and the inner wall of the case. it can. Therefore, the valve body is immediately pressed against the second facing surface side by the fluid flowing into the internal space, and the flow path of the fluid is quickly and reliably switched.

(Feature configuration)
In the flow path switching valve according to the present invention, the first flow part can be provided with a second valve body that opens when the pressure of the fluid in the internal space becomes equal to or higher than a preset pressure.

(effect)
By providing such a second valve body, when the fluid flows into the internal space, the internal space and the space on the first facing surface side are reliably partitioned with the valve body interposed therebetween. Therefore, immediately after the fluid is supplied to the internal space, the fluid does not flow into the first facing surface side, and the pressure in the internal space increases. As a result, the valve body is pressed, the first facing surface is pressed against the second facing surface, and the second flow part is partitioned.

  Thereafter, when the fluid further flows into the internal space, the pressure in the internal space rises, the second valve body opens, and the fluid flows only into the specific second circulation part.

  Thus, by providing the 2nd valve body of this structure, a fluid is not supplied to the 2nd distribution part which is not planned, but switching operation of a distribution destination can be performed reliably.

(Feature configuration)
In the flow path switching valve according to the present invention, the first opposing surface and the second opposing surface can be formed into spherical surfaces.

(effect)
The fluid flowing into the internal space is pressed toward the second facing surface while maintaining the posture of the valve body appropriately. However, if some vibration is applied to the flow path switching valve, the posture of the valve body with respect to the case may change. In this case, if the first facing surface and the second facing surface are formed as flat surfaces, for example, the sealed state of both facing surfaces may be impaired.

  Therefore, as in the present configuration, by configuring the first facing surface and the second facing surface as spherical surfaces, even if the posture of the valve body changes, the gap between the first facing surface and the second facing surface The change in dimensions can be mitigated, and the switching function of the fluid distribution destination is reliably ensured.

The disassembled perspective view which shows the structure of the flow-path switching valve concerning 1st Embodiment. Side sectional view which shows the structure of the flow-path switching valve concerning 1st Embodiment. The perspective view which shows the external appearance of the flow-path switching valve which concerns on 1st Embodiment. Explanatory drawing which shows the arrangement configuration of a 1st distribution part and a 2nd distribution part Side sectional view which shows the structure of the flow-path switching valve concerning 2nd Embodiment. Side sectional view which shows the structure of the flow-path switching valve concerning 3rd Embodiment. Explanatory drawing which shows the structure of the sealing member which concerns on 3rd Embodiment. Side sectional view which shows the structure of the flow-path switching valve concerning 4th Embodiment. Side sectional view which shows the structure of the flow-path switching valve which concerns on 5th Embodiment. Side sectional view which shows the structure of the flow-path switching valve concerning 6th Embodiment. Side sectional view which shows the structure of the flow-path switching valve concerning 7th Embodiment Explanatory drawing which shows the structure of the washing | cleaning apparatus which concerns on 1st Embodiment. Explanatory drawing which shows 2nd Example of a washing | cleaning apparatus. Explanatory drawing which shows 3rd Example of a washing | cleaning apparatus. Explanatory drawing which shows 4th Example of a washing | cleaning apparatus.

[First Embodiment]
(Overview)
1 to 4 show a first embodiment of a flow path switching valve B according to the present invention. FIG. 1 is an exploded perspective view of the flow path switching valve B, and FIG. 2 is a side sectional view of the flow path switching valve B. FIG. 3 is an external view of the flow path switching valve B, and FIG. 4 is a plan view showing an arrangement configuration of the first flow section R1 and the second flow section R2 related to the flow path to be switched.

  The flow path switching valve B of the present embodiment can be applied as a valve that appropriately switches the flow destination of the cleaning water that is the fluid W in a cleaning device such as a headlight of the vehicle 12 (FIG. 12) or an in-vehicle camera. This flow path switching valve B has a single fluid supply unit 1 for supplying the fluid W to the inside of the case C constituting the whole, and the fluid W whose distribution destination is switched inside the case C as the respective distribution destinations. And a plurality of fluid discharge sections 2 for discharging. Both of the fluid supply unit 1 and the fluid discharge unit 2 are configured in a nozzle shape. In the internal space 3 of the case C, a rotatable valve body V1 that circulates the fluid W from the fluid supply unit 1 to any one of the plurality of fluid discharge units 2 is provided.

  As shown in FIG. 1, the case C includes a first case C1 in which a fluid supply unit 1 and a plurality of fluid discharge units 2 are formed, and a second case C2 that functions as a lid member of the first case C1. . In the flow path switching valve B of the present embodiment, the valve body V1 is first inserted into the first case C1, and the urging member P1 is inserted into the boss portion Va of the valve body V1 through the washer 6. From above, the wall member 7 is fitted into the first case C1 with a first packing 28 made of a rubber material for sealing. A stepping motor as the drive unit K is disposed on the upper surface of the wall member 7. The drive shaft Ka of the stepping motor is inserted through the shaft hole 71 of the wall member 7. A rubber ring 8 for sealing is mounted between the shaft hole 71 and the drive shaft Ka. The drive unit K, the wall member 7, and the first case C1 are integrated by a fixing bolt K1.

  A second packing 29 for sealing is disposed around the wall member 7, and the drive unit K is covered by the second case C2. At this time, the engagement recess C2a of the second case C2 engages with the engagement protrusion 7a formed at the edge of the wall member 7.

  Inside the first case C1, an internal space 3 for temporarily storing the fluid W supplied via the fluid supply unit 1 is provided. The internal space 3 is formed in a cylindrical shape, for example. In the internal space 3, for example, a valve body V1 having a disk-shaped portion is disposed. The valve body V1 is rotationally driven by a drive unit K disposed adjacent to the internal space 3. The drive unit K is driven and controlled by the control unit E.

  The valve body V1 is pressed toward one wall portion forming the internal space 3 by the urging member P1. At this time, a surface formed on the valve body V1 is defined as a first facing surface F1 and a surface on the first case C1 side is defined as a second facing surface F2 among the two surfaces that are in contact with each other. As a result, as shown in FIG. 2, with respect to the disc-shaped portion of the valve body V <b> 1, one surface is the first facing surface F <b> 1 and the opposite surface is pressurized by the fluid W in the internal space 3. Become.

  The valve body V1 is formed with a first flow portion R1 that allows the fluid W in the internal space 3 to flow through the first facing surface F1. For example, as shown in FIGS. 1 and 2, the first flow part R <b> 1 is orthogonal to the first opposing surface F <b> 1 and the recess 4 that opens toward the second opposing surface F <b> 2 in a partial region of the first opposing surface F <b> 1. And a communication portion 5 that is formed in a partial region of the recess 4 and communicates the recess 4 with the internal space 3.

  As shown in FIGS. 1 and 4, the recess 4 opens to the first facing surface F1 and the side surface Vd of the valve body V1. Further, at the edge of the valve body V1, an arcuate cutout portion 5a is formed as a communication portion 5 that communicates from the pressure surface F3 to the recess 4.

  The valve body V1 is rotated by, for example, a stepping motor provided in the drive unit K, and the concave portion 4 moves in an arc shape along the second facing surface F2. Therefore, a plurality of second circulation portions R2 are provided on the second facing surface F2 in a scattered manner along the locus of the recess 4. About these 2nd distribution part R2, the opening area is varied according to the distribution destination of the fluid W. For example, what is supplied to the front window of the vehicle 12 that requires a large flow of water has a large opening area, and what is supplied to the rear camera that does not require such a high flow has a small opening area. In addition, each of the second circulation portions R2 is not always arranged on the circumference due to the position of providing the fluid discharge portion 2 with respect to the first case C1. Therefore, the shape of the recessed part 4 is provided with an area larger than the opening area of each 2nd flow part R2 so that it can oppose all 2nd flow parts R2 according to rotation of the valve body V1.

  However, if the first flow part R1 is, for example, notched in the same cross-sectional shape from the pressure surface F3 to the first facing surface F1, the area as the pressure surface F3 is reduced. On the other hand, when such a first circulation part R1 is formed, the area thereof is larger than the opening area of the second circulation part R2, but the flow rate of the fluid W flowing through the first circulation part R1 is the second circulation part. Since it will be prescribed | regulated by the opening area of part R2, it is not necessary to enlarge the opening area of 1st distribution | circulation part R1 excessively.

  Therefore, in the present embodiment, for example, as shown in FIGS. 1 and 4, the communication portion 5 is provided on the pressure surface F <b> 3 so as to overlap with a partial region of the recess 4 when viewed in the direction orthogonal to the first facing surface F <b> 1. The portion was a cutout portion 5a cut out in an arc shape.

  By forming such a notch 5a, it is possible to supply an appropriate flow rate of fluid W to each of the second circulation portions R2, and the fluid in the internal space 3 without excessively reducing the area of the pressure surface F3. The pressing force that W acts on the pressing surface F3 can be ensured to the maximum. Therefore, even if the installation environment of the flow path switching valve B is a vehicle 12 or the like with vibration, the first facing surface F1 and the second facing surface F2 can be strongly adhered, and the fluid W supply destination switching function About can improve the reliability.

  Moreover, the installation position of the fluid supply part 1 is important for the effect of bringing the first facing surface F1 into close contact with the second facing surface F2. As shown in FIG. 2, the fluid supply unit 1 is connected to the first case C <b> 1 from the side, and supplies the fluid W to the internal space 3. With such a structure of the fluid supply unit 1, the height of the flow path switching valve B is reduced, and the size can be reduced. However, since the fluid W flows in a direction perpendicular to the moving direction of the valve body V1, the force for moving the valve body V1 is only the pressure in the internal space 3.

  Therefore, in the present embodiment, the opening position of the fluid supply unit 1 with respect to the first case C1 is configured to be a position facing the pressurizing surface F3 of the valve body V1 in the internal space 3. As a result, the pressure of the fluid W flowing into the internal space 3 immediately acts on the pressurizing surface F3, the first opposing surface F1 of the valve body V1 is pressed against the second opposing surface 2, and the specific second circulation portion R2 becomes Selected.

  The urging member P1 that presses the valve body V1 against the second facing surface F2 is, for example, a coil spring provided across the first case C1 and the valve body V1, as shown in FIG. An annular washer 6 is provided between the coil spring and the pressure surface F3 so that the valve body V1 can rotate smoothly.

  The cross-sectional shape of the drive shaft Ka is formed, for example, in a non-circular shape with a chamfered portion, and a boss portion Va having a drive hole Vb into which the drive shaft Ka can be engaged is formed in one valve body V1. Yes. Since the valve body V1 needs to be close to and away from the second facing surface F2 over a certain distance, the drive shaft Ka and the drive hole Vb are relatively movable in the axial direction.

  The valve body V1 can be set to a predetermined rotation phase by the drive unit K, but it is necessary to confirm the reference position of the stepping motor at a predetermined position. Therefore, as shown in FIG. 1, the reference | standard protrusion 9 is provided in a part of pressurization surface F3 of the valve body V1. On the other hand, on the surface of the wall member 7 facing the pressing surface F3, a stopper 10 is provided on which the reference protrusion 9 abuts when the valve body V1 rotates around the rotation axis X to the forward and reverse rotational ends. ing. Thereby, when the valve body V1 is driven to the rotation end, or the valve body V1 is forcibly rotated to the rotation end at a predetermined timing, the current position of the valve body V1 can be reset.

  As shown in FIGS. 3 and 4, the first case C1 of the present embodiment is provided with eight second circulation portions R2. From each 2nd circulation part R2, the fluid discharge part 2 is each extended. As shown in FIG. 4, the opening area of each second circulation part R <b> 2 is appropriately set according to the required flow rate at the circulation destination where the fluid W is discharged. For example, the distribution destination of the second distribution unit R2 having a large opening area can be set to the front window or the rear window of the vehicle 12. On the other hand, the distribution destination of the second distribution portion R2 having a small opening area may be set to the left and right side cameras, the rear camera, and the like. Thereby, for example, even when the single fluid pump 11 is used, the fluid W with a predetermined flow velocity can be supplied to each distribution destination.

  In the case of the flow path switching valve B having this configuration, the area of the pressurizing surface F3 is configured to be as large as possible, so that the valve body V1 can be pressed against the second circulation portion R2 with the maximum pressure by the pressure of the fluid W. . Therefore, when switching the flow path, leakage to the second flow part R2 that does not particularly match the position of the recess 4 is reliably prevented, and the reliability of the flow path switching function is improved.

(First Example of Cleaning Device)
The flow path switching valve B of the present embodiment is applicable to, for example, the vehicle 12 cleaning device shown in FIG. In this cleaning apparatus, the cleaning water (fluid W) of the fluid tank 13 mounted on the vehicle 12 is not only supplied to the front window washer 30 for the front window 40 and the rear window washer 33 for the rear window 41 by the flow path switching valve B, It is switched and supplied to a front camera washer 31 for the front camera 42 used in automatic driving or an electronic mirror, a rear camera washer 34 for the rear camera 43, a left and right camera washer 32 for the left and right cameras 44, and the like.

  The operation of the flow path switching valve B is performed based on a dirt detection signal 14 obtained by analyzing a driver's manual operation or an image of each camera or the like. When the dirt detection signal 14 is input to the control unit E, the control unit E activates the flow path switching valve B to switch the flow path 15 to a place where cleaning is necessary. After switching the flow path 15, the control unit E activates the fluid pump 11, pumps the cleaning water, and sprays the cleaning water only on the portions that need to be cleaned. Therefore, the discharge capacity of the fluid pump 11 may be small, the fluid tank 13 can also be reduced in size, and the washing water can be saved, and unnecessary portions of the vehicle 12 are not contaminated with the washing water.

[Second Embodiment]
As shown in FIG. 5, the 2nd urging member P2 can also be provided over the 1st case C1 and the valve body V1. A mounting hole Vc for attaching the second urging member P2 is formed around the rotation axis X on the first facing surface F1 of the valve body V1. For example, a coil spring is inserted into the mounting hole Vc, and an urging force is applied in a direction in which the valve body V1 and the second facing surface F2 are separated. A second washer 16 for reducing the friction between the second urging member P2 and the bottom of the mounting hole Vc may be provided.

  Incidentally, the second biasing member P2 may be of another form such as a disc spring, or a magnet having the same polarity is provided on the first facing surface F1 and the second facing surface F2 so as to utilize the repulsive force of the magnet Any configuration may be used as long as the valve body V1 can be separated from the second facing surface F2.

  The urging force of the second urging member P2 is set larger than the urging force of the urging member P1. Thereby, in a state where the fluid W is not supplied from the fluid supply unit 1 to the internal space 3 of the first case C1, the first facing surface F1 is in a non-contact state with respect to other objects such as the second facing surface F2. .

  If it is this structure, before supplying the fluid W to the internal space 3, the drive part K will be operated and the rotation phase of the valve body V1 can be changed rapidly with a small force. By supplying the fluid W to the internal space 3 after changing the rotation phase, the pressure of the fluid W acts on the pressurizing surface F3, and the valve body V1 is secondly opposed in cooperation with the urging force of the urging member P1. It can be pressed against the surface F2. With this configuration, the phase change is accelerated while the configuration of the drive unit K is simplified and small. Further, the flow path switching valve B can be reduced in size and weight while enhancing the durability of the valve body V1 and the second facing surface F2.

  Furthermore, when the valve body V1 moves away from the second facing surface F2, if the fluid pump 11 is reversely rotated to return the fluid W in the internal space 3 to the fluid tank 13, the valve body V1 is already in the second circulation portion R2. It is possible to pull back the supplied fluid W. Accordingly, leakage of the fluid W at the distribution destination after the supply of the fluid W is stopped is prevented, or inconvenience such as freezing of the fluid W inside the supply pipe from the second circulation portion R2 is prevented. Can do.

[Third Embodiment]
As shown in FIGS. 6 and 7, a seal member S1 may be provided between the first facing surface F1 and the second facing surface F2. The seal member S1 is made of, for example, various elastic rubber materials or resin materials. As shown in FIG. 7, the seal member S1 corresponds to the second urging member P2 at the position corresponding to the plurality of second circulation portions R2. A hole portion 17 is formed at a position where this occurs. Further, a bank-like partitioning portion 18 is provided between the respective hole portions 17. Furthermore, a notch-shaped alignment portion 20 is formed on the outer peripheral portion, which engages with a locking projection 19 provided on the first case C1 and prevents itself from rotating with the rotation of the valve body V1. Has been.

  By providing the seal member S1, when the valve body V1 is pressed against the second facing surface F2, the seal member S1 is sandwiched between the first facing surface F1 and the second facing surface F2 and compressed by a predetermined amount. It deform | transforms and adjacent 2nd distribution part R2 can be partitioned off reliably. As a result, the reliability of the switching function of the distribution destination of the fluid W is increased.

  Further, by providing the second urging member P2, the valve body V1 is normally separated from the seal member S1, the rotational resistance of the valve body V1 is reduced, and the phase change of the valve body V1 is accelerated. Thus, the drive unit K can be downsized.

[Fourth Embodiment]
As shown in FIG. 8, a second seal member S2 may be provided between the valve body V1 and the first case C1. For example, a cylindrical side surface Vd centered on the rotational axis X of the drive unit K is formed on the outer periphery of the valve body V1, and a cylindrical inner wall Cd is also formed on the first case C1. The side surface Vd and the inner wall Cd are formed concentrically, and an annular second seal member S2 is provided therebetween.

  A through passage 21 as shown in FIG. 8 is formed in the valve body V1 as a first flow part R1 for flowing the fluid W from the pressure surface F3 side to the first facing surface F1. When viewed in the direction along the rotation axis X, the opening area of the through passage 21 is formed to be smaller than the area of the recess 4 formed on the first facing surface F1 side.

  As the second seal member S2, for example, a general rubber O-ring is used, and an annular groove portion 22 into which the second seal member S2 is fitted is formed in at least one of the valve body V1 and the first case C1. Good. Further, as shown in FIG. 8, an annular member having a V-shaped cross section can be used. In this case, the fluid W tends to escape from the pressurizing surface F3 side to the first opposing surface F1 side. By deforming the V-shaped portion so as to expand, it can be reliably prevented, and the valve body V1 can be quickly pressed toward the second facing surface F2.

  Thus, the second seal member S2 partitions the pressurizing surface F3 and the first facing surface F1 of the valve body V1 to ensure that the pressure of the fluid W is applied to the pressurizing surface F3 when the fluid W flows into the internal space 3. It acts and the pressing force with respect to the 2nd opposing surface F2 of the valve body V1 can be heightened. For this reason, the fluid W does not flow into the second circulation part R2 that is not scheduled to be supplied, and the switching function of the distribution destination is ensured.

[Fifth Embodiment]
As shown in FIG. 9, a second valve body V2 that opens when the pressure of the fluid W in the internal space 3 becomes equal to or higher than a preset pressure can be provided in the first flow part R1 of the valve body V1. . Specifically, for example, the second urging member P2 is provided around the rotation axis X of the valve body V1, and the first flow portion R1 is provided in the center of the valve body V1. The first flow portion R1 includes, for example, a horizontal hole 24 that opens in the side surface 23 of the boss portion Va of the valve body V1, and a vertical hole 25 that communicates with the horizontal hole 24 and is provided along the rotation axis X. ing. The second valve body V2 always shields the vertical hole 25 by the second urging member P2.

  When the second urging member P2 presses the valve body V1 to the side opposite to the second facing surface F2 via the second valve body V2, the valve body V1 contacts the wall member 7. In the present embodiment, in addition to the second urging member P2, the urging member P1 is not particularly provided. For this reason, the contact convex part 26 contact | abutted to the wall member 7 is formed in the edge part of the boss | hub part Va of the valve body V1. The contact protrusion 26 may be formed, for example, as an annular bank portion in order to reduce the contact area with the wall member 7 and reduce the rotational resistance of the valve body V1.

  Further, a seal member S1 is provided between the first opposing surface F1 and the second opposing surface F2, and a second seal member S2 is provided on the side surface Vd of the valve body V1.

  When the fluid W is supplied to the internal space 3, the pressurizing surface F3 of the valve body V1 is pushed by the fluid W, and the valve body V1 moves toward the second facing surface F2. At this time, the vertical hole 25 of the valve body V1 remains blocked. When the valve body V1 comes into contact with the seal member S1 and the pressure of the fluid W further increases, the second valve body V2 opens.

  When the second valve body V2 is opened, a spring receiving recess 27 is formed at a position of the second facing surface F2 where the second urging member P2 contacts so that the position of the second valve body V2 is not disturbed. It is good to leave.

  Further, the shape of the portion of the second valve body V2 that contacts the valve body V1 may be formed in a concave shape (FIG. 9) so as to surround the periphery of the vertical hole 25 and make a line contact. Although omitted, it may be formed in a spindle shape so that the tip fits into the vertical hole 25. Further, a valve member may be formed by separately attaching a rubber member or the like to at least one of the valve body V1 and the second valve body V2.

  Thus, by providing the 2nd valve body V2 in the center position of the valve body V1, the 2nd energizing member P2 makes the 2nd sealing member S2 the valve body V1 in the state which stabilized the attitude | position of the valve body V1. And a function of opening and closing the second valve body V2 can be provided, and a rational mechanism can be obtained.

[Sixth Embodiment]
As another embodiment of the second valve body V2, as shown in FIG. 10, it may be provided not at the center position of the valve body V1 but at a part of the recess 4. In this case, a through passage 21 that functions as the first flow part R1 is formed in a state of penetrating from the pressurization surface F3 to the concave part 4, and a thin plate-like third valve body V3 is provided on the concave part 4 side, for example. deep.

  The third valve body V3 is formed of, for example, an elastic metal or resin material. If the first circulation part R1 is normally shut off and the valve opens when the pressure of the fluid W in the internal space 3 increases, the pressure in the internal space 3 can be quickly increased when the fluid W is supplied. As a result, the operation of the valve body V1 becomes agile, and the switching function of the second circulation part R2 becomes stable.

  By providing the second seal member S2 on the side surface Vd of the valve body V1, the pressure of the internal space 3 rises quickly when the fluid W is supplied, and each of the second circulation portions R2 can be reliably partitioned. .

[Seventh Embodiment]
As shown in FIG. 11, the 1st opposing surface F1 and the 2nd opposing surface F2 can also be formed in a spherical surface. In the present embodiment, only the urging member P1 is provided, and the second urging member P2 and the seal member S1 are not provided.

  If it is this structure, even if the valve body V1 inclines at the time of the drive of the drive part K etc., the clearance gap between the 1st opposing surface F1 and the 2nd opposing surface F2 will not spread too much. Therefore, favorable sealing performance can be maintained for each second circulation portion R2.

[Second Embodiment of Cleaning Device]
In FIG. 13, the 2nd Example of the washing | cleaning apparatus which can mount the flow-path switching valve B of said each embodiment is shown. In this embodiment, the washing water (fluid W) is separately supplied to the two flow paths 15 by rotating the fluid pump 11 forward and backward. A flow path switching valve B is connected to one flow path 15, and a front window washer 30 is connected to the other flow path 15. That is, the frequently used front window washer 30 is directly connected to the fluid pump 11, eliminates the switching time of the flow path switching valve B, and quickly eliminates pressure loss in the piping provided in the flow path switching valve B. Operation is possible. On the other hand, other distribution destinations are switched by the flow path switching valve B.

  Downstream of the flow path switching valve B, for example, in addition to the front camera washer 31, left and right camera washers 32, a rear window washer 33, and a rear camera washer 34 are connected.

[Third embodiment of cleaning apparatus]
In FIG. 14, the 3rd Example of the washing | cleaning apparatus which can mount the flow-path switching valve B of said each embodiment is shown. In this embodiment, a first flow path switching valve B1 and a second flow path switching valve B2 are provided before and after the vehicle 12. The front first flow path switching valve B1 is connected to one flow path 15 of the fluid pump 11 that can be rotated in the same manner as in the second embodiment, and in addition to the front camera washer 31, the left and right Camera washer 32 is connected. A rear window washer 33, a rear camera washer 34, and various sensor washers 35 are connected to the rear second flow path switching valve B2.

  Whether the first flow path switching valve B1 or the second flow path switching valve B2 is to be used is determined by the controller E based on a manual operation signal from the driver or based on a dirt detection signal 14 from various dirt sensors. To do. With this configuration, the configuration may be simplified if only one channel 15 is provided between the first channel switching valve B1 and the second channel switching valve B2. Also, by providing a flow path 15 between the first flow path switching valve B1 and the second flow path switching valve B2 that has a sufficient flow rate, a decrease in fluid pressure is prevented at any distribution destination. The cleaning effect can be kept high. Further, by providing the first flow path switching valve B1 and the second flow path switching valve B2 before and after, sensors such as LIDAR (Light Detection and Ranging) can be easily added to the vehicle 12 in the future. .

[Fourth embodiment of the cleaning apparatus]
FIG. 15 shows a fourth example of the cleaning apparatus in which the flow path switching valve B of each of the above embodiments can be mounted. In this embodiment, the front window washer 30 and the flow path 15 connected to the rear of the vehicle body are switched by forward / reverse rotation of the fluid pump 11. A flow path switching valve B is installed in the flow path 15 at the rear of the vehicle body, and the flow path 15 is further switched from here to a rear window washer 33 and a rear camera washer 34.

  The flow path switching valve according to the present invention can be widely applied as selecting and switching a specific flow path from a plurality of flow paths for supplying fluid.

DESCRIPTION OF SYMBOLS 1 Fluid supply part 2 Fluid discharge part 3 Internal space 4 Recessed part 5 Communication part B Flow path switching valve C Case Cd Inner wall F1 1st opposing surface F2 2nd opposing surface K Drive part P1 Energizing member P2 2nd energizing member R1 1st 1 flow part R2 2nd flow part S1 seal member S2 second seal member V1 valve body V2 second valve body Vd side face W fluid X rotation axis

Claims (6)

Case and
A fluid supply unit provided in the case and configured to supply a fluid to the internal space of the case;
A valve body that is rotatably provided in the internal space, and has a first circulation part that circulates the fluid that has flowed in from the fluid supply part to a specific circulation destination, and a first facing surface that opens the first circulation part;
A second facing surface provided in the case in a state facing the first facing surface;
An urging member that presses the first opposing surface of the valve body against the second opposing surface across the case and the valve body,
A drive unit for rotationally driving the valve body;
A plurality of second flow portions provided on the second facing surface, wherein the communication state with the first flow portion is switched according to the rotational phase of the valve body;
A plurality of fluid ejection portions communicating with each of the plurality of second circulation portions and ejecting the fluid to the specific circulation destination;
The fluid supply unit is provided in a state of opening to a space on the opposite side of the first facing surface with respect to the valve body in the internal space,
A concave portion formed at a position where the first circulation portion opens toward the second opposed surface in a partial region of the first opposed surface and can face each of the plurality of second flow portions; A flow path switching valve comprising: a communication portion that is formed in a partial region of the recess when viewed in a direction perpendicular to the first facing surface and communicates the recess with the internal space.   The valve body is urged in a direction away from the second opposing surface across the case and the valve body, and the first fluid is not supplied from the fluid supply portion to the internal space. The flow path switching valve according to claim 1, further comprising a second urging member that brings the opposing surface into a non-contact state with respect to another object.   3. The flow path switching valve according to claim 1, further comprising a seal member that abuts against the first facing surface and the second facing surface and partitions the plurality of second circulation portions.   The valve body has a cylindrical side surface centered on the rotational axis of the drive unit, the case includes a cylindrical inner wall surrounding the side surface, and a second seal member is provided between the side surface and the inner wall. The flow path switching valve according to any one of claims 1 to 3, further comprising:   The flow according to any one of claims 1 to 4, wherein a second valve body that opens when the pressure of the fluid in the internal space becomes equal to or higher than a preset pressure is provided in the first flow part. Road switching valve.   The flow path switching valve according to any one of claims 1 to 5, wherein the first facing surface and the second facing surface are formed into spherical surfaces.

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