JP2018009602A - Flow passage switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow passage switching device capable of achieving switching of flow passages of a fluid at low cost.SOLUTION: A flow passage switching device includes a housing and a switching member. The housing includes: an inflow port communicated with a supply source of a fluid; a flow port communicated with a supply destination of the fluid; and a discharge port communicated with an outside device. The switching member switches the flow passages of the fluid by rotating around a predetermined rotation axis by a rotational driving force of a motor. Here, the state of the switching member includes a first state and a second state. In the first state, the switching member opens the flow passage for flowing the fluid flowing in from the inflow port to the flow port, and closes the flow passage for flowing the fluid returned from the flow port to the discharge port. In the second state, the switching member opens the flow passage for flowing the fluid returned from the flow port to the discharge port.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flow path switching device.

  2. Description of the Related Art Conventionally, in a system that circulates a fluid such as air from a supply source to a supply destination, a flow path switching device for switching a fluid flow path is used. For example, as a technique related to such a fluid switching device, a technique using an electromagnetic valve is known.

JP2015-169354A

  However, in the technology using a conventional electromagnetic valve, when switching a plurality of flow paths, the electromagnetic valve is provided for each flow path, which may be costly.

  The present invention has been made in view of the above, and an object of the present invention is to provide a flow path switching device that can realize switching of a flow path of a fluid at low cost.

  In order to solve the above-described problems and achieve the object, a flow path switching device according to one embodiment of the present invention includes a housing and a switching member. The housing has an inflow port communicating with a fluid supply source, a flow port communicating with a fluid supply destination, and an exhaust port communicating with the outside of the apparatus. The switching member switches the fluid flow path by rotating about a predetermined rotation axis by the rotational driving force of the motor. Here, the state of the switching member includes a first state and a second state. In the first state, the switching member opens the flow path for flowing the fluid flowing in from the inflow port to the flow port, and closes the flow path for flowing the fluid returned from the flow port to the discharge port. To do. In the second state, the switching member opens a flow path for allowing the fluid returned from the flow port to flow to the discharge port.

  According to one embodiment of the present invention, switching of a fluid flow path can be realized at low cost.

FIG. 1 is a perspective view showing an appearance of the flow path switching device according to the present embodiment. FIG. 2 is an exploded perspective view illustrating a configuration example of the flow path switching device according to the present embodiment. FIG. 3 is a perspective view showing an intermittent drive mechanism, a switching member, and an urging member according to the present embodiment. FIG. 4 is a perspective view showing an intermittent drive mechanism, a switching member, and an urging member according to the present embodiment. FIG. 5 is a diagram illustrating channel switching by the switching member according to the present embodiment. FIG. 6 is a diagram illustrating channel switching by the switching member according to the present embodiment. FIG. 7 is a diagram illustrating switching of the flow path by the switching member according to the present embodiment. FIG. 8 is a diagram illustrating switching of the flow path by the switching member according to the present embodiment. FIG. 9 is a diagram illustrating switching of the flow path by the switching member according to the present embodiment. FIG. 10 is a diagram illustrating channel switching by the switching member according to the present embodiment. FIG. 11 is a diagram illustrating a third state of the switching member according to the present embodiment. FIG. 12 is a diagram illustrating a fourth state of the switching member according to the present embodiment.

  Hereinafter, an embodiment of a flow path switching device according to the present application will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an appearance of the flow path switching device according to the present embodiment. For example, the flow path switching device according to the present embodiment is used in a system that supplies air compressed by a compressor to a pressurized object such as an airbag, and switches the flow path between the compressor and the pressurized object. . In the present embodiment, an example in which the fluid is air, the fluid supply source is a compressor, and the fluid supply destination is an object to be pressurized will be described.

  For example, as shown in FIG. 1, the flow path switching device 100 according to this embodiment includes a housing 110 having an inflow port 111, three flow ports 112, and a discharge port 113. The casing 110 is formed in a cylindrical box shape having two opposed surfaces, and an inlet 111 and three circulation ports 112 are provided on one surface, and an outlet 113 is provided on the other surface. ing.

  The inflow port 111 is provided at the center of one surface of the housing 110. The three circulation ports 112 are provided on the same circumference centering on the inflow port 111 at intervals of 120 degrees along the circumferential direction. The inflow port 111 is communicated with the compressor. The three circulation ports 112 are communicated with different pressurization targets. The discharge port 113 communicates with the outside of the apparatus.

  Here, the flow path switching device 100 distributes the air flowing in from the inflow port 111 to any one of the three flow ports 112 and exhausts the air returned from the other flow ports 112 that do not supply air. The flow path is switched so as to flow to the outlet 113. The flow path switching device 100 is configured to switch the flow path without using an electromagnetic valve by performing such a flow path switching by the rotational driving force of the motor.

  FIG. 2 is an exploded perspective view illustrating a configuration example of the flow path switching device 100 according to the present embodiment. For example, as shown in FIG. 2, the flow path switching device 100 includes a housing 110, a motor 120, an intermittent drive mechanism 130, a switching member 140, and an urging member 150.

  The housing 110 includes a first housing member 114, a second housing member 115, and a seal member 116. The first housing member 114 and the second housing member 115 are each formed in a cylindrical box shape having two surfaces. The seal member 116 is a member formed in a disk shape, and is disposed between the first housing member 114 and the second housing member 115. Here, the first housing member 114, the second housing member 115, and the seal member 116 are arranged so that the central axes thereof overlap the rotation axis R of the switching member 140.

  Specifically, the first housing member 114 includes a first box member 114a formed in a bottomed cylindrical shape and a first lid member 114b formed in a disk shape. The first lid member 114b is disposed so as to cover the opening side of the first box member 114a. The first lid member 114b is provided with the inflow port 111 and the three flow ports 112 described above.

  Here, in the inside of the first box member 114a, a circular inner peripheral partition part 114c disposed so as to surround the vicinity of the center, and between the inner peripheral partition part 114c and the peripheral wall of the first box member 114a. The circular outer peripheral partition part 114d arranged and three radial partition parts 114e extending radially from the outer periphery of the inner peripheral partition part 114c to the peripheral wall of the first box member 114a are provided. By these partitions, the space inside the first housing member 114 is divided into seven sections.

  The inner partition of the inner peripheral partition 114c communicates with the inlet 111 provided in the first lid member 114b. The three compartments divided by the three radial partition portions 114e between the inner peripheral partition portion 114c and the outer peripheral partition portion 114d communicate with the three flow ports 112 provided in the first lid member 114b, respectively. ing.

  In addition, a first inner peripheral hole 114f and a first outer peripheral hole 114g are formed on the same radius at every 120 degrees along the circumferential direction at the bottom of the first box member 114a. Here, the first inner peripheral hole 114f is formed at the same position in the radial direction as the inner peripheral partition 114c so as to straddle the inner partition and the outer partition of the inner peripheral partition 114c. The first outer peripheral hole 114g is formed at the same position in the radial direction as the outer peripheral partition 114d so as to straddle the inner compartment and the outer compartment of the outer peripheral partition 114d.

  The second housing member 115 includes a second box member 115a formed in a bottomed cylindrical shape and a second lid member 115b formed in a disk shape. The second lid member 115b is disposed so as to cover the opening side of the second box member 115a. The second box member 115a is provided with the discharge port 113 described above.

  Here, in the second lid member 115b, a second inner peripheral hole 115f and a second outer peripheral hole 115g are formed on the same radius every 120 degrees along the circumferential direction. Here, the second inner peripheral hole 115f is formed at the same position in the circumferential direction as the first inner peripheral hole 114f formed at the bottom of the first box member 114a. That is, it can be said that the second inner peripheral hole 115f is provided at the same position in the radial direction as the inner peripheral partition portion 114c provided in the first box member 114a. The second outer peripheral hole 115g is formed at the same position in the circumferential direction as the first outer peripheral hole 114g formed at the bottom of the first box member 114a. That is, it can be said that the second outer peripheral hole 115g is provided at the same position in the radial direction as the outer peripheral partition portion 114d provided inside the first box member 114a.

  The seal member 116 is a member formed in a disk shape, and is disposed between the first housing member 114 and the second housing member 115. The seal member 116 is formed using, for example, an elastic body such as rubber and has elasticity.

  The seal member 116 is arranged so as to be orthogonal to the rotation axis R, and in the first casing member 114 and the second casing member 115 at positions away from the rotation axis R in the radial direction. An opening 116a that communicates with each other is formed. Here, the opening 116a is located at the same position in the radial direction as the outer peripheral partition 114d provided inside the first box member 114a, and is formed at the bottom of the first box member 114a. It is formed at the same position in the circumferential direction as the outer peripheral hole 114g. That is, it can be said that the opening 116a is formed at the same position in the circumferential direction as the second outer peripheral hole 115g formed in the second lid member 115b.

  Therefore, when the first casing member 114, the second casing member 115, and the seal member 116 are arranged so as to overlap in the axial direction, the first outer periphery formed at the bottom of the first box member 114a. The opening 116a formed in the seal member 116 is disposed between the hole 114g and the second outer peripheral hole 115g formed in the second lid member 115b.

  Here, according to the configuration described above, the flow path for circulating the air flowing in from the inlet 111 to the circulation port 112 and the flow for circulating the air returned from the circulation port 112 to the discharge port 113 inside the housing 110. A road is formed.

  Specifically, as a result of communication between the inner compartment and the outer compartment of the inner peripheral partition 114c by the first inner peripheral hole 114f formed in the first box member 114a, the first casing Inside the member 114, a flow path for circulating the air flowing in from the inlet 111 to the circulation port 112 is formed.

  The first outer peripheral hole 114g formed in the bottom of the first box member 114a, the second outer peripheral hole 115g formed in the second lid member 115b, and the opening 116a formed in the seal member 116. Are disposed at the same position in the radial direction and the circumferential direction, and as a result, air returned from the circulation port 112 is exhausted from the first casing member 114 to the second casing member 115 through the opening 116a. A flow path that circulates to the outlet 113 is formed.

  The motor 120 is driven by power supplied from a battery (not shown) connected via wiring. The motor 120 generates a rotational driving force by rotating the output shaft with power supplied from the battery.

  The intermittent drive mechanism 130 intermittently transmits the rotational driving force of the motor 120 to the switching member 140. Specifically, the intermittent drive mechanism 130 includes a driver 131 that intermittently transmits the rotational driving force of the motor 120 to the follower 132 and a follower 132 that rotates intermittently by the driver 131. . For example, the intermittent drive mechanism 130 is realized by a geneva mechanism, an intermittent gear mechanism, or the like.

  The switching member 140 switches the air flow path by rotating about the rotation axis R by the rotational driving force of the motor 120. Specifically, the switching member 140 is connected to the motor 120 via the intermittent drive mechanism 130, and rotates in the circumferential direction about the rotation axis R by the rotational drive force intermittently transmitted from the intermittent drive mechanism 130. By doing so, the air flow path is switched.

  The urging member 150 urges the switching member 140 toward the seal member 116. For example, the biasing member 150 is an elastic member such as a spring member, and is disposed between the follower 132 and the switching member 140 of the intermittent drive mechanism 130.

  Here, the intermittent drive mechanism 130, the switching member 140, and the biasing member 150 described above are accommodated in the second casing member 115, respectively.

  3 and 4 are perspective views showing the intermittent drive mechanism 130, the switching member 140, and the urging member 150 according to the present embodiment. For example, as illustrated in FIG. 3, the switching member 140 includes one long shaft portion 140 a and two short shaft portions 140 b that extend radially about the rotation axis R. The long shaft portion 140a and the two short shaft portions 140b are arranged with an interval of 120 degrees in the circumferential direction. The long shaft portion 140a is longer than the two short shaft portions 140b, and the two short shaft portions 140b are formed to have the same length.

  And the obstruction | occlusion part 141 is provided in the front-end | tip part of the long axis part 140a. Here, the closing portion 141 is provided at a position radially away from the rotation axis R by the same distance as the distance between the opening 116 a formed in the seal member 116 and the rotation axis R. That is, it can be said that the closing part 141 is provided at the same position in the radial direction as the outer peripheral partition part 114d provided in the first box member 114a. The closing portion 141 is a seal member between the outer peripheral partition portion 114d provided in the first box member 114a through the second outer peripheral hole 115g formed in the second lid member 115b. The opening 116 a formed in 116 can be pressed.

  On the other hand, a contact portion 142 is provided on each of the two short shaft portions 140b. Here, the abutment portion 142 is a position that is separated from the rotation axis R in the radial direction by the same distance as the distance between the rotation axis R and the inner peripheral partition 114c provided inside the first box member 114a. Is provided. That is, it can be said that it is formed at the same position in the radial direction as the inner peripheral partition 114c provided inside the first box member 114a. And the contact part 142 is between the internal peripheral partition parts 114c provided in the inside of the 1st box member 114a via the 2nd internal peripheral hole 115f formed in the 2nd cover member 115b. The seal member 116 has a shape capable of pressing a part thereof. For example, the closing portion 141 and the contact portion 142 are rollers that move while rolling along the circumferential direction of the rotation axis R.

  Here, the switching member 140 is urged toward the seal member 116 by the urging member 150. For this reason, when the closing part 141 provided in the switching member 140 is moved to the position of the second outer peripheral hole 115g formed in the second lid member 115b by the rotation of the switching member 140. The opening 116a formed in the seal member 116 is pressed between the outer peripheral partition 114d provided inside the first box member 114a. On the other hand, the contact portion 142 provided in the switching member 140 is also moved to the position of the second inner peripheral hole 115f formed in the second lid member 115b by the rotation of the switching member 140. Will press a part of the seal member 116 with the inner peripheral partition 114c provided inside the first box member 114a.

  The switching member 140 is connected to the motor 120 via the intermittent drive mechanism 130, and rotates at a predetermined angle for each period in which the rotational drive force of the motor 120 is continuously transmitted from the intermittent drive mechanism 130. Switch the air flow path with. In the present embodiment, the switching member 140 rotates intermittently 120 degrees in the circumferential direction around the rotation axis R.

  For example, as shown in FIG. 4, the intermittent drive mechanism 130 is a geneva mechanism, and includes a drive element 131 having a pin 131a and a follower 132 having three slots 132a.

  The driver 131 is formed in a shape in which two discs having different diameters are overlapped with the center axis aligned. Here, the first disc 131b having a long diameter is provided with a pin 131a in a part in the circumferential direction, and the second disc 131c having a short diameter has an arc shape so as to surround the pin 131a. The notch 131d is formed. The driver 131 is connected to the motor 120 and rotates about the rotation axis M of the motor 120 by the rotational driving force of the motor 120.

  The follower 132 is a member formed in a substantially equilateral triangle shape, and has slots 132a formed radially from the center toward each vertex of the triangle. Here, the follower 132 is formed in a shape in which each side of the triangle is recessed in an arc shape according to the shape of the circumference of the second disk 131c of the driver 131, and each side recessed in the arc shape. Is arranged so as to be in sliding contact with the circumferential portion of the second disk 131c of the driver 131. The follower 132 is connected to the switching member 140, and rotates the switching member 140 about the rotation axis R by rotating itself.

  Then, when the driving element 131 rotates about the rotation axis M by the rotational driving force of the motor 120, the pin 131a moves in the circumferential direction and enters the slot 132a of the follower 132 to rotate the follower 132. . The follower 132 rotates around the rotation axis R while the pin 131a is inserted into the slot 132a. After the pin 131a is removed from the slot 132a, the follower 132 is next inserted into another slot 132a. It will be in the state stopped without rotating. As a result, the follower 132 rotates intermittently by 120 degrees in the circumferential direction. Along with this, the switching member 140 also rotates intermittently 120 degrees in the circumferential direction around the rotation axis R.

  Thus, the switching member 140 rotates 120 degrees in the circumferential direction by intermittently rotating 120 degrees in the circumferential direction around the rotation axis R. Each time the switching member 140 rotates 120 degrees in the circumferential direction, the air flowing in from the inflow port 111 is circulated to any one of the three flow ports 112, and the other flow ports that do not supply air The flow path is switched so that the air returned from 112 is circulated to the discharge port 113.

  5-10 is a figure which shows switching of the flow path by the switching member 140 which concerns on this embodiment. Here, FIG. 5 is a perspective view of the casing 110 viewed from the inlet 111 side, and FIG. 6 is a perspective view of the casing 110 viewed from the outlet 113 (not shown) side. 7 is a cross-sectional view taken along the line AA shown in FIGS. 5 and 6, and FIG. 8 is a cross-sectional view taken along the line BB shown in FIGS. FIG. 9 is an enlarged view showing a state in the vicinity of the first outer peripheral hole 114g and the second outer peripheral hole 115g in FIG. 7, and FIG. 10 shows the first inner peripheral hole 114f and the first outer peripheral hole 114f shown in FIG. It is an enlarged view which shows the mode of the vicinity of 115 f of inner peripheral holes.

  The state of the switching member 140 includes a first state and a second state. For example, as shown by the AA line in FIGS. 5 and 6, the state when the closing portion 141 of the switching member 140 is moved to the position of the second outer peripheral hole 115g formed in the second lid member 115b. Is called the first state. On the other hand, for example, as shown by the line BB in FIGS. 5 and 6, the contact portion 142 provided in the switching member 140 is formed in the second inner peripheral hole 115 f formed in the second lid member 115 b. The state when moved to the position is referred to as a second state.

  In the first state, the switching member 140 opens a flow path through which air flowing in from the inflow port 111 is circulated to one flow port 112, and distributes air returned from the one flow port 112 to the discharge port 113. The flow path is closed.

  For example, as shown in FIG. 7, in the first state, the switching member 140 discharges air returned from the circulation port 112 by closing the opening 116 a formed in the sealing member 116 with the closing portion 141. The flow path flowing through 113 is closed.

  At this time, for example, as shown in FIG. 9, the switching member 140 has a closing portion 141 inside the first box member 114 a via a second outer peripheral hole 115 g formed in the second lid member 115 b. The opening 116a formed in the seal member 116 is closed by pressing the opening 116a formed in the seal member 116 between the outer peripheral partitioning portion 114d provided in the seal member 116. Here, the outer peripheral partition 114d is formed so that the width in the radial direction is larger than the opening 116a.

  Further, for example, as shown in FIG. 7, in the first state, a part of the seal member 116 is bent by the pressure of the air, thereby opening a flow path for circulating the air flowing in from the inflow port 111 to the flow port 112. To do.

  At this time, for example, as illustrated in FIG. 10, the switching member 140 is configured such that the abutting portion 142 abuts on a portion different from a portion of the seal member 116, and the portion is curved by the air pressure, thereby The flow path for circulating the air flowing in from the distribution port 112 is opened.

  In the first state, the switching member 140 causes the air flowing in from the inflow port 111 to flow to the other two flow ports 112 in the same manner as the flow path switching in the second state described below. While closing a flow path, the flow path which distribute | circulates the air returned from the said other 2 circulation port 112 to the discharge port 113 is open | released.

  In the second state, the switching member 140 opens a flow path for circulating the air returned from the circulation port 112 to the discharge port 113.

  For example, as shown in FIG. 8, in the second state, the switching member 140 allows the air that is returned from the circulation port 112 to be discharged from the outlet 112 by opening the opening 116 a formed in the sealing member 116 by the closing portion 141. The flow path for circulation to 113 is opened.

  At this time, for example, as shown by a broken line in FIG. 9, the switching member 140 opens the opening 116 a and returns from the circulation port 112 by moving the closing portion 141 to a position different from the opening 116 a. The flow path for circulating the air to be discharged to the discharge port 113 is opened.

  In the second state, the switching member 140 opens the flow path for circulating the air returned from the circulation port 112 to the discharge port 113 and flows the air flowing from the inlet 111 to the circulation port 112. The road may be blocked.

  For example, as shown in FIG. 8, in the second state, the switching member 140 further causes the abutting portion 142 to abut a part of the seal member 116, so that the air flowing in from the inflow port 111 is supplied to the circulation port 112. The flow path to be circulated is closed.

  At this time, for example, as shown by a broken line in FIG. 10, the switching member 140 has a contact portion 142 in the first box via the second inner peripheral hole 115 f formed in the second lid member 115 b. By pressing a part of the seal member 116 between the inner peripheral partition 114c provided inside the member 114a, the flow path through which the air flowing in from the inflow port 111 is circulated to the flow port 112 is closed.

  Note that the state of the switching member 140 includes not only the first state and the second state described above, but also other states. In the present embodiment, the switching member 140 has one closing part 141 and two contact parts 142. Therefore, for example, the state of the switching member 140 includes a state until switching from the first state to the second state, a state until switching from the second state to the second state, and a second state. A state until the state is switched to the first state is also included. Here, a state until the first state is switched to the second state is referred to as a third state. In addition, a state until switching from the second state to the first state is referred to as a fourth state.

  FIG. 11 is a diagram illustrating a third state of the switching member 140 according to the present embodiment. FIG. 12 is a view showing a fourth state of the switching member 140 according to the present embodiment. Here, FIGS. 11 and 12 each show the same cross section as FIG.

  For example, as shown in FIGS. 11 and 12, in the third and fourth states, the switching member 140 is such that the closing portion 141 is located at the position of the second outer peripheral hole 115g formed in the second lid member 115b. The contact portion 142 moves to a different position, and the contact portion 142 is moved to a position different from the position of the second inner peripheral hole 115f formed in the second lid member 115b. That is, in the third and fourth states, the closing portion 141 of the switching member 140 is in a state in which the opening portion 116a formed in the seal member 116 is opened, and the contact portion 142 is in the second inner peripheral hole. A part of the seal member 116 is not pressed through 115f.

  Thus, in the third and fourth states, the air flowing in from the inflow port 111 is partially bent by the pressure of the air, so that the inner peripheral partition portion 114c is straddled across the inner peripheral partition portion 114c. 114c flows from the inner compartment to the outer compartment. Here, since the air that has flowed into the outer partition of the inner peripheral partition 114c flows in a lower atmospheric pressure, it does not flow to the circulation port 112 but flows to the discharge port 113 through the opening 116a. .

  Further, in the third state, since the immediately preceding state is the first state, air is accumulated in the pressurized object. Therefore, in the third state, when the atmospheric pressure to be pressurized and the atmospheric pressure of the outside air are not yet in an equilibrium state, air returned from the pressurized object passes through the circulation port 112 and passes through the first casing. It flows into the member 114 and flows into the discharge port 113 through the opening 116a of the seal member 116. In that case, in the third state, the switching member 140 circulates both the air returned from the circulation port 112 and the air flowing in from the inlet 111 to the outlet 113.

  On the other hand, in the fourth state, since the immediately preceding state is the second state, the air accumulated in the pressurization target has already flowed out to the discharge port 113. Therefore, in the fourth state, when the pressure to be pressurized and the atmospheric pressure are already in an equilibrium state, air is not returned from the circulation port 112. In that case, in the fourth state, the switching member 140 circulates only the air flowing in from the inflow port 111 to the discharge port 113.

  In addition, about the state until it switches from a 2nd state to a 2nd state, since the state immediately before is a 2nd state, the air which accumulated in the pressurization object has already flowed out to the discharge port 113. Yes. Therefore, the state is similar to the fourth state.

  As described above, according to the flow path switching device 100 according to the present embodiment, the flow path can be switched without using an electromagnetic valve by switching the air flow path by the rotational driving force of the motor 120. For this reason, for example, even when a plurality of flow paths are switched, it is not necessary to provide a solenoid valve for each flow path, and the flow paths can be switched with a simple structure. Therefore, according to this embodiment, switching of the air flow path can be realized at low cost.

  In addition, although embodiment mentioned above demonstrated the example in the case of rotating the switching member 140 intermittently using the intermittent drive mechanism 130, embodiment is not restricted to this. For example, instead of using the intermittent drive mechanism 130, the switching member 140 may be rotated intermittently by controlling the motor 120 to stop each time it rotates a predetermined angle.

  Moreover, although embodiment mentioned above demonstrated the example in case the number of the circulation ports 112 connected to the pressurization object is three, embodiment is not restricted to this. For example, the above-described channel switching technique can be similarly applied even when the number of the circulation ports 112 is less than three, or when there are three or more.

  For example, when the number of the circulation ports 112 is n (n: natural number), the number of the first inner peripheral holes 114f and the first outer peripheral holes 114g in the first box member 114a, the second lid member 115b, the number of second inner peripheral holes 115f and second outer peripheral holes 115g and the number of openings 116a in the seal member 116 are n, and the number of short shaft portions 140b in the switching member 140 is n-1. To. In this case, in either case, the first inner peripheral hole 114f and the first outer peripheral hole 114g in the first box member 114a, and the second inner peripheral hole 115f and the second outer peripheral hole in the second lid member 115b. The outer peripheral hole 115g, the opening 116a in the seal member 116, and the long shaft portion 140a and the short shaft portion 140b in the switching member 140 are arranged at equal intervals around the rotation axis R in the circumferential direction. In addition, when the number of the circulation ports 112 is one (n = 1), in order to switch between the first state and the second state for one circulation port 112, the long shaft portion 140a and the short shaft portion 140b Are provided one by one.

  In the above-described embodiment, an example in which the fluid is air has been described, but the embodiment is not limited thereto. For example, the above-described channel switching technique can be similarly applied even when the fluid is a liquid.

  As mentioned above, although embodiment of the fluid switching apparatus which concerns on this application was described, this invention is not limited by the said embodiment. What was comprised combining each component mentioned above suitably is also contained in this invention. Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.

DESCRIPTION OF SYMBOLS 100 Flow path switching device 110 Housing | casing 111 Inflow port 112 Through-flow port 113 Outlet port 114 1st housing member 115 2nd housing member 120 Motor 130 Intermittent drive mechanism 140 Switching member 150 Energizing member

Claims (8)

A housing having an inlet communicating with a fluid supply source, a circulation port communicating with a fluid supply destination, and a discharge port communicating with the outside of the device;
A switching member that switches the flow path of the fluid by rotating about a predetermined rotation axis by the rotational driving force of the motor,
The state of the switching member includes a first state and a second state,
In the first state, the switching member opens a flow path through which the fluid flowing in from the inflow port is circulated to the circulation port, and a flow path through which the fluid returned from the circulation port is circulated to the discharge port. Occluded,
In the second state, the switching member opens a flow path for circulating the fluid returned from the circulation port to the discharge port.
Channel switching device. The housing has a plurality of distribution ports,
In the first state, the switching member opens a flow path for allowing the fluid flowing in from the inflow port to flow to one flow port, and causes the fluid returned from the one flow port to flow to the discharge port. The flow path is closed and the flow path for flowing the fluid flowing in from the inflow port to the other flow port is closed, and the flow path for flowing the fluid returned from the other flow port to the discharge port is opened. And
In the second state, the switching member opens a flow path for circulating the fluid returned from the one circulation port to the discharge port.
The flow path switching device according to claim 1. The casing includes a first casing member provided with the inlet and the outlet, a second casing member provided with the outlet, the first casing member, and the second casing. A sealing member disposed between the housing member and
The seal member is disposed so as to be orthogonal to the rotation axis, and is an opening that communicates the inside of the first casing member and the inside of the second casing member at a position separated from the rotation axis in the radial direction. Part is formed,
The switching member has a closing portion provided at a position separated from the rotating shaft in the radial direction by the same distance as the distance between the opening and the rotating shaft,
In the first state, the closing portion closes the opening, thereby closing the flow path for circulating the fluid returned from the circulation port to the discharge port,
In the second state, the closing portion opens the opening, thereby opening a flow path for circulating the fluid returned from the circulation port to the discharge port.
The flow path switching device according to claim 1 or 2. The sealing member has elasticity,
In the first state, a part of the seal member is bent by the pressure of the fluid, thereby opening a flow path for flowing the fluid flowing in from the inflow port to the flow port.
The flow path switching device according to claim 3. The switching member has a contact portion provided at a position away from the rotation shaft in the radial direction
In the first state, the contact portion contacts a portion different from the portion of the seal member, and the portion is bent by the pressure of the fluid, so that the fluid flowing in from the inflow port flows into the flow port. Open the flow path to circulate,
In the second state, the abutment portion abuts on the part of the seal member, thereby closing a flow path through which the fluid flowing in from the inflow port is circulated to the circulation port.
The flow path switching device according to claim 4. The closing portion and the contact portion are rollers that move while rolling along the circumferential direction of the rotating shaft.
The flow path switching device according to claim 5. A biasing member that biases the switching member toward the seal member;
The flow path switching device according to any one of claims 3 to 6. The switching member is connected to the motor via an intermittent drive mechanism, and the fluid rotates by a predetermined angle for each period in which the rotational driving force of the motor is continuously transmitted from the intermittent drive mechanism. Switch the flow path of
The flow path switching device according to any one of claims 1 to 7.

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