JP6122665B2 - Channel switching device - Google Patents

Description

  In the present invention, one inlet port and two outlet ports are connected to the main body defining the inner space, and the fluid flowing from the inlet port into the inner space is selected as one of the outlet ports by the valve body. TECHNICAL FIELD The present invention relates to a flow path switching device that flows out automatically.

  Various flow path switching devices are provided for switching the flow path so that the fluid flowing in one upstream side pipe flows to one of the two downstream side pipes. For example, Patent Document 1 describes a flow path switching device (a three-way switching valve) that switches a flow path of a fluid containing particulate matter such as rice grains.

  As shown in FIG. 4, the flow path switching device includes a main body 110 that defines an internal space 100, a cylindrical inlet port 120 that forms a flow path that communicates with the internal space 100, a first outlet port 121, A second outlet port 122 and a valve body 130 rotatably housed in the internal space 100 are provided.

  The main body 110 includes a cylindrical peripheral wall 111 and an end plate (only one end plate is shown) 112 that closes each open end of the peripheral wall 111. The peripheral wall 111 has openings at three locations. Each port 120, 121, 122 is fixed to the peripheral wall 111 so as to surround each opening. Moreover, the 1st exit port 121 and the 2nd exit port 122 are being fixed to the surrounding wall part 111 so that it adjoins and adjoins. The inlet port 120 is fixed to the peripheral wall portion 111 at a position facing the portion between the first outlet port 121 and the second outlet port 122.

  The valve body 130 is a plate-like member that partitions the internal space 100 and is bent at the center in a “<” shape so as to close only one outlet port. The valve body 130 switches the flow path by rotating around the bent portion. That is, as shown by the solid line in FIG. 4, the valve body 130 blocks the flow path of the second outlet port 122, whereby the inlet port 120 and the first outlet port 121 communicate with each other. Then, as indicated by the phantom line in FIG. 4, the valve body 130 rotates and closes the flow path of the first outlet port 121 so that the inlet port 120 and the second outlet port 122 communicate with each other.

  As described above, the fluid flowing into the internal space 100 from the inlet port 120 selectively flows out from either the first outlet port 121 or the second outlet port 122. That is, the flow path is switched by rotating the valve body 130. Further, in this flow path switching device, since the valve body 130 rotates and there is no portion for retaining the fluid between the valve body 130 and the main body 110, the water contains particulate matter. Even if it is a fluid, a granular material is hard to accumulate in a casing.

Japanese Patent Laid-Open No. 9-26040

  In the flow path switching device described in Patent Document 1, the valve element 130 is bent in a “<” shape. In order to switch the flow path by the valve body 130, the valve body 130 must rotate about a half turn. Therefore, with this flow path switching device, the flow paths cannot be switched quickly.

  Further, the valve body 130 bent in a “<” shape is in a posture in which a portion on the inlet port 120 side faces the inlet port 120 in an inclined posture. Therefore, a part of the fluid that has flowed into the internal space 100 from the inlet port 120 collides with a portion of the valve body 130 on the inlet port 120 side. If the fluid is a mass like ice, it may be crushed into a large number of debris by the collision. When these pieces adhere to other lumps, the lumps are enlarged. As a result, fluid may not flow out of the outlet port in the intended state.

  SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a flow path switching device that can quickly switch flow paths and that can smoothly flow from an inlet port to an outlet port without stagnation. To do.

The flow path switching device according to the present invention includes a main body portion that defines an internal space, an inlet port that forms an inlet flow path that communicates with the internal space, and a first outlet that forms a first outlet flow path that communicates with the internal space. A port, a second outlet port provided with a second outlet channel that communicates with the internal space, and a channel or inlet stream that is swingably housed in the internal space and communicates from the inlet channel to the first outlet channel. A flow path switching device including a valve body that forms a flow path communicating with the second outlet flow path from the path, wherein the first outlet port and the second outlet port are adjacent to each other, and the first outlet port narrow the inter is provided in a portion of the main body portion sandwiched between the second outlet port, the inlet port is continuously provided to the main body portion facing the the narrow space portion, the boundary between the first outlet port and the interstice portion Provided with a first outlet side boundary, and a second outlet side boundary at the boundary between the second outlet port and the narrow portion An inlet side first boundary portion is provided at the boundary between the inlet port and the main body portion, the side communicating with the first outlet port, and the inlet side first boundary portion is provided at the boundary communicating with the second outlet port. Two boundary portions are provided, and the valve body closes the first outlet flow path in a direction connecting the inlet-side first boundary portion and the second outlet-side boundary portion, and the inlet-side second boundary portion and the second boundary portion. A swing shaft that can change the direction to a state in which the second outlet flow path is closed in a direction connecting the boundary portion on the one outlet side is fixed, and the main body is located at a position where the swing shaft approaches the inlet port from the narrow portion. The main body portion includes an annular peripheral wall portion that connects the ports, and the first outlet port and the second outlet port are formed in a cylindrical shape, and the first outlet side boundary And the second outlet side boundary portion are formed in a straight line, and the valve body includes the first outlet side boundary portion and the second outlet side boundary portion. It is characterized in that it is formed in substantially rectangular shape with straight end portions along.
The flow path switching device according to the present invention includes a main body portion that defines an internal space, an inlet port that forms an inlet flow path that communicates with the internal space, and a first outlet that forms a first outlet flow path that communicates with the internal space. A port, a second outlet port provided with a second outlet channel that communicates with the internal space, and a channel or inlet stream that is swingably housed in the internal space and communicates from the inlet channel to the first outlet channel. A flow path switching device including a valve body that forms a flow path communicating with the second outlet flow path from the path, wherein the first outlet port and the second outlet port are adjacent to each other, and the first outlet port A narrow portion is provided in a portion of the main body sandwiched between the second outlet port, an inlet port is continuously provided in the main portion of the portion facing the narrow portion, and at the boundary between the first outlet port and the narrow portion. A first outlet side boundary is provided, and a second outlet side boundary is provided at the boundary between the second outlet port and the narrow portion. An inlet side first boundary portion is provided at the boundary between the inlet port and the main body portion, the side communicating with the first outlet port, and the inlet side first boundary portion is provided at the boundary communicating with the second outlet port. Two boundary portions are provided, and the valve body closes the first outlet flow path in a direction connecting the inlet-side first boundary portion and the second outlet-side boundary portion, and the inlet-side second boundary portion and the second boundary portion. A swing shaft that can change direction to a state in which the second outlet flow path is closed in a direction connecting with the one outlet side boundary portion is provided with a long portion extending to the inlet port side of the valve body, and on the narrow portion side of the valve body It is fixed at a position eccentric from the center so as to provide a short portion extending to the center, and the swing shaft is located at a position near the entrance port from the narrow portion, at a position between the center of the internal space and the narrow portion. The first outlet port is pivotally supported by a main body portion, and the main body portion includes an annular peripheral wall portion continuously connecting the ports. And the second outlet port is formed in a cylindrical shape, the first outlet side boundary portion and the second outlet side boundary portion are formed in a straight line shape, and the valve body includes the first outlet side boundary portion and the second outlet portion. It is characterized by being formed in a substantially square shape having a linear end portion along the outlet side boundary portion.

According to these flow path switching unit, the valve body, by which is oriented connecting the inlet first boundary portion and the second outlet-side boundary portion, first effluent stream to rock within the interior space The path is blocked, the inlet channel and the second outlet channel communicate with each other, and the second outlet channel is blocked by connecting the inlet-side second boundary and the first outlet-side boundary. The inlet channel and the first outlet channel communicate with each other.

  The valve body has a swinging shaft fixed, and the swinging shaft is pivotally supported by the main body at a position close to the inlet port from the narrow portion. Even turn around quickly. When the valve body is oriented to connect the inlet-side first boundary and the second outlet-side boundary, no step is provided between the valve body and the second outlet port, and the valve body If it is set as the direction which connects a side 2nd boundary part and a 1st exit side boundary part, a level | step difference will not be provided between a valve body and a 1st exit port. Therefore, the fluid that has flowed into the internal space from the inside of the inlet channel flows out smoothly from the first outlet channel or the second outlet channel without stagnation.

The swing shaft is fixed at a position eccentric from the center so as to provide a long portion extending toward the inlet port side of the valve body and a short portion extending toward the narrow portion side of the valve body, If it is pivotally supported by the main body at a position between it and the narrow part, the tip part of the long part provided in the valve body swings with the amplitude of the large diameter of the inlet channel, and the tip part of the short part is the narrow part. It swings with a narrow amplitude.

The main body includes an annular peripheral wall that continuously connects the ports, and the first outlet port and the second outlet port are formed in a cylindrical shape, and the first outlet-side boundary and the second outlet outlet side boundary portion is formed in a linear shape, the valve body, that is formed into a substantially rectangular shape with straight end portions along the first outlet side boundary portion and the second outlet boundary.

Thus, even if the valve body is formed in a general substantially rectangular shape and the first outlet port and the second outlet port are formed in a general cylindrical shape, the first outlet side boundary portion and the second outlet side By forming the boundary portion in a straight line, the linear end portion extending to the narrow space side of the valve body is continuous with the linear first outlet side boundary portion and the second outlet side boundary portion, It is possible to prevent the step portion from being provided in the internal space. Since the pipe connected to the outlet port is generally a circular pipe, the outlet port is formed in a cylindrical shape.

Further, as one aspect of the flow path switching device, the main body portion includes a sealing portion integrally formed on the peripheral wall portion so as to close one end opening side of the annular peripheral wall portion, and other than the annular peripheral wall portion. It is possible to employ a configuration in which a lid body portion that covers the end opening side with a separate body is provided, and each port and the peripheral wall portion of the main body portion are integrally formed.

  According to this flow path switching device, the peripheral wall portion and the sealing portion are integrally formed, the peripheral wall portion and each port are integrally formed, and the other end opening side of the peripheral wall portion is closed with a separate lid portion. Assembling workability on site can be improved.

  Further, as another aspect of the flow path switching device, the valve body may adopt a configuration in which the valve body has a length that swings by providing a gap with the narrow portion.

  According to this flow path switching device, the valve body has a length that provides a gap with the casing, so that the fluid may be easily crushed or contain lumps. It is possible to prevent the lump of the lump from being caught between the valve body and the casing.

  According to the present invention, it is possible to provide a flow path switching device that can smoothly switch a flow path so that a fluid can flow smoothly from an inlet port to an outlet port without stagnation. it can.

1A and 1B show an embodiment of a flow path switching device according to the present invention, in which FIG. 1A is a sectional plan view, and FIG. 1B is a sectional front view taken along line AA in FIG. FIG. 2 is a perspective view showing a main part of an embodiment of the flow path switching device according to the present invention. FIG. 3 is a perspective view showing an essential part of an embodiment of the flow path switching device according to the present invention. FIG. 4 is a cross-sectional plan view showing an example of a conventional flow path switching device.

  An embodiment of a flow path switching device according to the present invention will be described with reference to FIGS. The flow path switching device includes a main body 10 that defines an internal space 1, a cylindrical inlet port 20 in which an inlet flow path 20a is formed, and cylindrical first and second cylinders in which outlet flow paths 21a and 22a are formed. Outlet ports 21 and 22 and a valve body 30 slidably accommodated in the internal space 1 are provided.

  The main body 10 has an annular peripheral wall 11, a blocking part 12 integrally formed with the peripheral wall 11 so as to close one end opening side of the peripheral wall 11, and the other end opening side of the peripheral wall 11 separately. And a lid 13 for closing. A flange 11 f is provided on the other end opening side of the peripheral wall portion 11. A number of female screws (not numbered) are formed on the flange 11f.

  The outer peripheral part of the lid part 13 is overlapped with the flange 11 f of the peripheral wall part 11. A large number of through holes (not numbered) are provided in the outer peripheral portion of the lid portion 13. The lid 14 and the peripheral wall 11 are integrated by inserting the bolt 14 through the female hole of the flange 11 f of the peripheral wall 11 from the communication hole.

  An opening 10a on the inlet side is formed at one place on one side (left side in FIG. 1) of the main body 10. In addition, at two locations on the other side (right side in FIG. 1) of the main body 10, openings 10b and 10c on the outlet side are formed adjacent to each other.

  A cylindrical inlet port 20 is integrally connected to the peripheral wall 11 of the main body 10 so that the inlet-side opening 10a and the inlet channel 20a communicate with each other. A flange 20f is provided at the distal end of the inlet port 20, and a cylindrical upstream pipe (not shown) is connected using the flange 20f.

  Further, the cylindrical first and second outlet ports 21 and 22 are provided on the main body 10 so that the openings 10b and 10c on the outlet side and the outlet channels 21a and 22a of the outlet ports 21 and 22 communicate with each other. The peripheral wall portion 11 is integrally provided continuously. Flange 21f, 22f is also provided at the tip of first and second outlet ports 21, 22, and cylindrical first and second downstream pipes (not shown) are connected using flanges 21f, 22f. Is done.

  And the 1st exit port 21 and the 2nd exit port 22 adjoin and adjoin, and are orientated in the direction which makes the angle of 40 degrees, for example. A narrow portion 11 b is provided in the peripheral wall portion 11 between the first outlet port 21 and the second outlet port 22. And the 1st exit side boundary part 51 is provided in the boundary of the 1st exit port 21 and the narrow part 11b. Moreover, the 2nd exit side boundary part 52 is provided in the boundary of the 2nd exit port 22 and the narrow part 11b.

  The first outlet side boundary portion 51 and the second outlet side boundary portion 52 are formed in a straight line shape. Since both the outlet ports 21 and 22 are cylindrical, they are formed in curved surfaces that gradually deform from a straight line to an arc from the outlet side boundary portions 51 and 52 to the intermediate portion of the outlet ports 21 and 22 without any step.

  Further, the opening 10a on the inlet side is formed in a circular shape. Therefore, the opening 10a on the inlet side and the cylindrical inlet port 20 are formed to have the same diameter and are continuous in a curved surface without a step. The boundary between the inlet port 20 and the main body 10 and communicating with the first outlet port 21 is the inlet-side first boundary 41. In addition, the boundary between the inlet port 20 and the main body 10 and the side communicating with the second outlet port 22 is an inlet-side second boundary portion 42.

  The valve body 30 is formed in a general rectangular plate shape. The valve body 30 is slightly narrower than the interval between the sealing part 12 of the main body part 10 and the lid part 13 so that the valve body 30 can be swung freely in the closed space, and the inner diameter of the peripheral wall part 11 of the main body part 10. Has been slightly shorter than. Therefore, a gap is provided between the end portion of the valve body 30 facing the narrow portion 11b and the narrow portion 11b.

  Further, a swing shaft 60 is fixed to the end surface of the valve body 30 facing the blocking portion 12 and the end surface facing the lid portion 13. A through-hole 30a in the width direction (vertical direction in FIG. 1B) may be formed in the valve body 30, and the swing shaft 60 may pass through the through-hole 30a. In this case, a key groove is formed in the swing shaft 60 and the valve body 30, and the key 61 is fitted in the key groove, so that the swing shaft 60 and the valve body 30 are integrated.

  The swing shaft 60 is fixed at a position that is eccentric from the center of the valve body 30, and the portion of the valve body 30 that extends from the swing shaft 60 toward the inlet port 20 is an elongated portion 31. A portion of the valve body 30 extending toward the portion 11b is a short portion 32. The front end portion of the short portion 32 is formed in a straight line along each outlet side boundary portion. Further, both the long and small portions 31 and 32 are slightly tapered.

  Then, the valve body 30 swings around the swing shaft 60 so that the distal end portion of the elongated portion 31 of the valve body 30 reciprocates between the inlet side first boundary portion 41 and the inlet side second boundary portion 42. The tip part of the short part 32 of the valve body 30 reciprocates between the first outlet side boundary part 51 and the second outlet side boundary part 52 along the narrow part 11b.

  The swing shaft 60 that swings the valve body 30 is pivotally supported by the main body 10 at a position between the center of the internal space 1 and the narrow portion 11b. That is, a through hole is formed in the sealing portion 12 of the main body portion 10, and the tip end portion of the swing shaft 60 is fitted into the through hole via a radial bearing (not numbered). The through hole is closed by the cap-shaped member 16, and the cap-shaped member 16 is joined to the end surface of the base end portion of the swing shaft 60 via a thrust bearing (not numbered).

  Also, a through hole is formed in the lid portion 13, and the base end portion of the swing shaft 60 passes through the through hole via a radial bearing (not numbered). A cylindrical support member 15 having a shaft hole continuous with the through hole is fixed to the lid portion 13. The base end portion of the swing shaft 60 protrudes from the shaft hole of the support member 15 and is connected to the actuator 62. When the actuator 62 operates, the swing shaft 60 and the valve body 30 swing integrally.

  This flow path switching device is configured as described above, and the method of use will be described next. The flow path switching device is installed in a vertical posture with the inlet port 20 facing upward and the outlet ports 21 and 22 facing downward, and may be an ice-like lump like natural gas hydrate or lump. It is also used when switching the flow path of a fluid containing an object.

  That is, the fluid flows from the upstream side pipe through the inlet port 20 into the internal space 1 of the main body 10. The internal space 1 is partitioned by the valve body 30, and initially, for example, as shown by the solid line in FIG. 1A, the valve body 30 closes the first outlet flow path 21a, so that the inlet flow path 20a and the second outlet flow path. The flow path 22a communicates.

  In this state, the distal end portion of the elongated portion 31 of the valve body 30 is continuous with the inlet side first boundary portion 41, and the distal end portion of the short portion 32 of the valve body 30 is continued with the second outlet side boundary portion 52. Therefore, no step is provided in the internal space 1. For this reason, the fluid that has flowed into the internal space 1 smoothly flows to the second outlet channel 22 a in the second outlet port 22. Then, this fluid is discharged into the second downstream side pipe connected to the second outlet port 22.

  When the actuator 62 is operated to switch the flow path from this state, as shown by the phantom line in FIG. 1 (a), the distal end portion of the elongated portion 31 of the valve body 30 continues to the inlet-side second boundary portion 42, The distal end portion of the short portion 32 of the valve body 30 continues to the first outlet side boundary portion 51, so that the valve body 30 closes the second outlet flow path 22a, and the inlet flow path 20a and the first outlet flow path 21a are connected. Communicate. No step is provided in the internal space 1 at this time. Therefore, the fluid that has flowed into the internal space 1 smoothly flows to the first outlet channel 21 a in the first outlet port 21. Then, this fluid is discharged into the first downstream pipe connected to the first outlet port 21.

  When the flow path is switched in this way, the rocking shaft 60 is fixed at an eccentric position, that is, at a position where the large portion 31 and the short portion 32 of the valve body 30 are provided. The valve body 30 swings more rapidly than the case. In other words, the valve body 30 is quickly switched from the direction in which the inlet channel 20a and the second outlet channel 22a are communicated to the direction in which the inlet channel 20a and the first channel are communicated. Be changed.

  Then, again, the valve body 30 closes the first outlet channel 21a, and the actuator 62 rotates the swing shaft 60 in the opposite direction in order to connect the inlet channel 20a and the second outlet channel 22a. Also at this time, the flow path is quickly switched. Even if a lump remains on the narrow portion 11b, the tip of the short portion 32 of the valve body 30 swings along the narrow portion 11b, so that this lump is formed on the short portion 32 of the valve body 30. It is beaten and no lump is left on the narrow portion 11b.

  Even if the lump is crushed and debris adheres to the narrow portion 11b, a gap is left between the tip of the short portion 32 of the valve body 30 and the narrow portion 11b. It is not caught between the part 32 and the narrow part 11b.

  In this way, the flow path switching device quickly switches the fluid flow path to either the first outlet flow path 21a or the first outflow path 21b, and the fluid stays in the internal space 1. It can be prevented from remaining.

  Note that the present invention can be variously modified without being limited to the above embodiment. For example, the angle formed by the first outlet port 21 and the second outlet port 22 can be appropriately changed depending on the fluid, and the position where the swing shaft 60 is fixed to the valve body 30 is appropriately adjusted according to this angle. It may be changed. In this case, the position where the swing shaft 60 is pivotally supported by the main body 10 is appropriately changed to the center of the internal space 1 or the like.

  Moreover, the peripheral wall part 11 and the blocking part 12 of the main body part 10 may be separated, or the peripheral wall part 11 and each port may be separated. Furthermore, the peripheral wall part 11 is good also as a shape curved outwards like a barrel shape instead of a cylindrical shape. In this case, both end portions of the valve body 30 are formed in an arc shape. Moreover, when only a lump is flowed as a fluid, the valve body 30 may be formed in a grid | lattice form for weight reduction. Conversely, the valve body 30 may be provided with ribs for reinforcement.

  In the above-described embodiment, the case where a gap is formed between the short portion 32 and the narrow portion 11 b of the valve body 30 has been described. However, when the fluid is liquid or gas, the valve body 30 is not the main body portion 30. The size should be close to the inner wall. In this case, the periphery of the valve body 30 may be formed of an elastic member.

  Further, although not shown, a plurality of the flow path switching devices may be connected in series. For example, when three flow path switching devices are connected in series, the inlet port 20 of the second flow path switching device is connected to the first outlet port 21 of the first flow path switching device, and the first flow switching device is connected. By connecting the inlet port 20 of the third flow path switching device to the second outlet port 22 of the path switching device, four outlet ports are provided. Furthermore, four or more flow path switching devices may be connected. A plurality of the flow path switching devices connected in this way can distribute the fluid in multiple directions.

DESCRIPTION OF SYMBOLS 1 ......... Internal space 10 ... Main-body part 11 ... Perimeter wall part 11b ... Narrow part 12 ... Sealing part 13 ... Cover body part 20 ... Inlet port 20a ... Inlet channel 21 ... Outlet port 21a ... Outlet flow Path 22 ... Exit port 22a ... Outlet flow path 30 ... Valve 31 ... Long part 32 ... Small part 41 ... Inlet side first boundary part 42 ... Inlet side second boundary part 51 ... First outlet Side boundary part 52 ...... Second outlet side boundary part 60 ... Oscillating shaft

Claims (4)

A main body that defines the internal space, an inlet port that forms an inlet channel that communicates with the internal space, a first outlet port that forms a first outlet channel that communicates with the internal space, and a second that communicates with the internal space A second outlet port provided with an outlet channel and a swingable housing in the internal space, and a channel communicating from the inlet channel to the first outlet channel or a channel communicating from the inlet channel to the second outlet channel In the flow path switching device provided with a valve body that forms the flow path,
The first adjoin closely the outlet port and the second outlet port is narrow The inter is provided in a portion of the main body portion sandwiched between the first outlet port and a second outlet port, and the narrow part between An inlet port is connected to the body portion of the facing portion, a first outlet side boundary portion is provided at the boundary between the first outlet port and the narrow portion, and a second outlet side boundary portion is provided at the boundary between the second outlet port and the narrow portion. An inlet side first boundary portion is provided at the boundary between the inlet port and the main body, the side communicating with the first outlet port, and the inlet side second at the boundary communicating with the second outlet port. A boundary portion is provided, and the valve body is in a state in which the first outlet flow path is closed in a direction connecting the inlet-side first boundary portion and the second outlet-side boundary portion, and the inlet-side second boundary portion and the first A swing shaft that can change direction to a state in which the second outlet flow path is closed in a direction connecting the outlet side boundary portion is fixed, and the swing shaft Is supported by a main body portion at a position close to the inlet port from the interstice portion,
The main body includes an annular peripheral wall that continuously connects the ports, and the first outlet port and the second outlet port are formed in a cylindrical shape, and the first outlet side boundary portion and the second outlet side The boundary portion is formed in a straight line shape, and the valve body is formed in a substantially rectangular shape having straight end portions along the first outlet side boundary portion and the second outlet side boundary portion. A flow path switching device. A main body that defines the internal space, an inlet port that forms an inlet channel that communicates with the internal space, a first outlet port that forms a first outlet channel that communicates with the internal space, and a second that communicates with the internal space A second outlet port provided with an outlet channel and a swingable housing in the internal space, and a channel communicating from the inlet channel to the first outlet channel or a channel communicating from the inlet channel to the second outlet channel In the flow path switching device provided with a valve body that forms the flow path,
The first outlet port and the second outlet port are adjacent to each other, and a narrow portion is provided at a portion of the main body sandwiched between the first outlet port and the second outlet port, and faces the narrow portion. An inlet port is connected to the main body of the part, a first outlet side boundary is provided at the boundary between the first outlet port and the narrow portion, and a second outlet side boundary is provided at the boundary between the second outlet port and the narrow portion. A boundary between the inlet port and the main body, the first boundary on the side communicating with the first outlet port, the first boundary on the side communicating with the second outlet port, and the second boundary on the inlet side The valve body includes a state in which the first outlet flow path is closed in a direction connecting the inlet-side first boundary portion and the second outlet-side boundary portion, and the inlet-side second boundary portion and the first outlet. the pivot shaft of the in a direction connecting the side boundary can diverted and state closes the second outlet channel, the valve body of the inlet port It was fixed to a position eccentric from the center to provide a short and small portions extending interstice portion side of and valve body provided with a long portion extending the side, a position where the swing axis is closer to the inlet port from the interstice portion , Pivotally supported by the main body at a position between the center of the internal space and the narrow space ,
The main body includes an annular peripheral wall that continuously connects the ports, and the first outlet port and the second outlet port are formed in a cylindrical shape, and the first outlet side boundary portion and the second outlet side The boundary portion is formed in a straight line shape, and the valve body is formed in a substantially rectangular shape having straight end portions along the first outlet side boundary portion and the second outlet side boundary portion. A flow path switching device. The main body includes a sealing part integrally formed on the peripheral wall so as to close one end opening side of the annular peripheral wall, and a lid part closing the other end opening of the annular peripheral wall separately. the provided, passage switching device according to claim 1 or 2, wherein the peripheral wall of the port and the body portion, characterized in that it is integrally molded. The flow path switching device according to any one of claims 1 to 3, wherein the valve body has a length that swings with a gap provided between the valve body and the valve body .

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