KR101799777B1 - Flow switching valve selectively distribuiting fluid to multiple outlets - Google Patents

Abstract

The present invention relates to a flow switching valve selectively distributing a fluid flowing into an inlet to multiple outlets. The flow switching valve includes: a first chamber supplying the fluid by being connected to a supply source of the fluid; a second chamber adjacent to the first chamber and having a path between the first chamber so that the fluid is supplied from the first chamber to the second chamber; an opening and closing valve including a plug arranged in the path between the first chamber and the second chamber and installed to open and close the flow of the fluid between the first chamber and the second chamber by a movement of the plug in a longitudinal direction; a third chamber adjacent to the second chamber and having multiple discharge flow paths formed on the outer side of the circumference; a flow path determining rotation body installed in the third chamber to rotate; a fluid transfer member extended from the second chamber to the third chamber and discharging the fluid from the outlet installed in the third chamber as the fluid flows inside from an inlet installed in the second chamber; a distribution tube formed of an elastic material and rotating with the flow path determining rotation body by being installed in the flow path determining rotation body, wherein the distribution tube has an inflow end of the fluid connected to the outlet of the fluid transfer member and an outlet end of the fluid facing the one discharge flow path among the multiple discharge flow paths in accordance with rotation of the flow path determining rotation body; a first driving unit opening and closing the opening and closing valve; and a second driving unit rotating the flow path determining rotation body.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a flow switching valve for selectively distributing a fluid to a plurality of flow paths,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow path switching valve, and more particularly, to a multi-directional flow path switching valve that can be switched so as to distribute fluid selectively to one or more flow paths among a plurality of flow paths.

Multi-directional flow path switching valves are used in various devices and industries.

As an example thereof, Japanese Patent Application Laid-Open No. 10-2011-0112190 (Document 1) discloses a multi-directional switching valve used in a refrigeration cycle. The multi-directional switching valve of Document 1 has a structure in which a plurality of outflow ports are provided in the valve body, and a port through which the fluid flows is determined by the rotating body rotated by the servomotor or the stepping motor.

A valve of the same type as that of Document 1 has various sealing members used for cutting the metal material to precisely process and secure the watertightness, but the manufacturing cost thereof is considerable.

A washing machine is an example of a device for distributing and distributing fluid in multiple directions.

When the washing water is supplied from the washing machine, the washing water may be directly supplied to a plurality of positions of the washing tub, if necessary, or may be supplied through a box containing a detergent or a fabric softening agent.

In a typical washing machine, in supplying laundry water supplied from a supply source of washing water such as a tap water to a washing tub, a detergent box, and a fabric softener box as needed, a solenoid valve is provided in a flow path connected to each supply source, Each solenoid was operated according to the washing mode, and the supply of washing water was controlled by opening and closing the valves.

However, in such a configuration, since the solenoid valve must be provided for each flow channel in which the washing water is supplied, the manufacturing cost of the washing machine is increased.

There is a detergent dispenser for washing machine disclosed in Patent Document No. 10-1223561 (Document 2) disclosing a variable flow path switching valve to be applied to a washing machine.

The apparatus of Document 2 is provided with a detergent dispensing member, and the detergent dispensing member is partitioned by a partition wall into a detergent dispensing groove for containing the respective detergent. A water supply guide member for supplying wash water to each of the detergent input grooves of the detergent supply member is provided. The water supply guide member is provided with a plurality of flow paths for dropping and supplying the wash water into the respective detergent supply grooves.

And a flow path switching member for distributing wash water to a flow path selected from the flow paths of the water supply guide member. The flow path switching member is provided with a nozzle in which the motor drives a plurality of gears and the final gear is rotated in accordance with the rotation of the motor. The nozzle rotates in accordance with the rotation of the motor, So that the washing water is supplied dropwise.

According to the structure of the apparatus of Document 2, in supplying washing water to a plurality of flow paths from one washing water supply source, the flow paths are switched by the flow path switching member driven by one motor without providing valves for each flow path .

On the other hand, in a drum type washing machine or a washing machine having a drying function, the washing water is mainly supplied to the washing tub by the falling method, but the washing water is sprayed or sprayed to the washing tub.

In order to spray or spray the washing water to the washing tub, a certain pressure must be applied to the washing water. However, the apparatus of Document 2 supplies the washing water from the nozzle to the flow path and from the flow path to the detergent loading groove by the dropping method, The flow path and the detergent input groove are not watertight so that the washing water having a slight water pressure such as water supplied from the water supply can not be distributed.

Document 1: Published Patent Application No. 10-2011-0112190 Document 2: Registration No. 10-1223561

The present invention provides a multi-directional flow path switching valve that can be switched so that the fluid can be selectively distributed to any one of the plurality of flow paths by means of an inlet, Flow switching valve.

Particularly, the present invention is intended to provide a flow path switching valve of a configuration that can be constructed simply because the watertightness structure is not complicated while maintaining the watertightness.

The above-described object of the present invention is achieved by a flow path switching valve according to the present invention which selectively distributes a fluid to a plurality of flow paths.

According to the present invention,

A first chamber connected to a source of fluid and supplied with fluid; A second chamber provided adjacent to the first chamber and having a passage formed between the first chamber and the first chamber to supply fluid from the first chamber; An open / close valve including a plug disposed in a passage between the first chamber and the second chamber, the opening / closing valve being capable of opening / closing a fluid flow between the first chamber and the second chamber by the longitudinal movement of the plug; A third chamber provided adjacent to the second chamber and having a plurality of discharge flow paths formed on the periphery thereof; The flow path of the flow path of the flow path of the flow path of the flow path of the flow path is changed. A fluid delivery member that extends from the second chamber to the third chamber and discharges fluid from an inlet disposed in the second chamber and discharged from an outlet disposed in the third chamber; A plurality of discharge flow paths which are formed of a material having flexibility and which are disposed in the flow path crystal revolution body and rotate together with the flow path determination rotating body and which are connected to the outflow port of the fluid transfer member, A distribution tube having an outflow end of the fluid facing one of the discharge flow paths; A first driving means for opening and closing the opening and closing valve; And a second drive means for rotating the flow path turning body,

The fluid delivery member is coupled to the opening and closing valve and the distribution tube is configured such that the inlet end is coupled to the outlet of the fluid delivery member such that the fluid delivery member and the distribution tube are moved longitudinally as the longitudinal movement of the valve is shifted,

When the opening / closing valve is moved in the opening direction, the fluid transfer member and the distribution tube are moved in the longitudinal direction so that the outlet end of the distribution tube abuts against the opposed discharge flow path, so that the fluid from the first chamber flows into the second chamber, And when the opening / closing valve moves in the closing direction, the outlet end of the distribution tube is released from the state in which it comes into contact with the discharge flow path.

The operation of the flow path switching valve according to the present invention having such a configuration will be described.

First, the flow path crystallization rotating body rotates at a specific angle in the third chamber so that the outlet end of the distribution tube disposed therein is located at a position facing one of the plurality of discharge flow paths formed around the third chamber Is set.

The fluid is supplied to the first chamber and the fluid is supplied to the second chamber when the opening / closing valve opens the through-hole between the first chamber and the second chamber, and the fluid is transferred to the second chamber through the inlet of the fluid- And is fed to the distribution tube through the inlet end of the distribution tube connected to its outlet end.

When the opening / closing valve moves in the longitudinal direction to open the through hole, the fluid transfer member and the distribution tube coupled to the opening / closing valve move in the longitudinal direction to come in contact with the discharge flow passage facing the outlet end of the distribution tube, And the supplied fluid is supplied to the discharge passage.

When the opening / closing valve moves in the direction opposite to the opening direction in the longitudinal direction for closing the through hole, the fluid transfer member and the distribution tube move in the opposite direction, and the outlet end of the distribution tube is spaced from the discharge flow path abutted.

In order to supply the fluid to the other discharge channel, the channel crystal rotating body is rotated at a specific angle by the second driving means so that the outlet end of the distribution tube comes into contact with the discharge channel to which the fluid is to be supplied.

And then the opening / closing valve is moved to open the through hole so that the outlet end of the distribution tube and the discharge flow passage abut against each other to repeat the operation of supplying the fluid.

According to the structure and operation of the flow path switching valve according to the present invention, a very compact structure can be obtained in which a mechanism for cutting off the supply of fluid and a mechanism for switching the flow path are integrated and operated together.

Particularly, in the present invention, the fluid flow switching and the fluid flow blocking action are realized by a simple operation of valve opening / closing operation and rotation of the rotating body rather than complicated operation, It is possible to construct the multi-directional flow path switching valve without fail.

Further, in the present invention, since the supplied fluid can be supplied to the multi-directional flow path without lowering the pressure other than the pressure drop according to the flow resistance thereof, it can be used for various purposes, Can be implemented very simply.

In the meantime, in the present invention, the distribution tube constituting the path through which the fluid flows is connected to the fluid transmission member and the on-off valve, and moves according to the longitudinal movement of the on-off valve, Respectively.

The specific configuration for implementing these two operations can be configured in three modes.

First, the opening / closing valve, the fluid transmitting member, and the distribution tube are coupled together so as to rotate together with the rotation of the flow path crystal rotator. In this case, the opening / closing valve, the fluid transmitting member, It is possible to obtain a satisfactory operation by causing the axial direction of the longitudinal direction to lie on the rotation axis of the flow path turning body.

Secondly, since the fluid transmitting member rotates together with the distribution tube so that the fluid delivery member rotates together and the opening / closing valve does not rotate, the flow path forming member rotates relative to the opening / closing valve so that the distribution tube and the fluid transmitting member rotate The opening / closing valve is configured not to rotate.

Thirdly, the distribution tube is coupled to the fluid transmitting member in a relatively rotatable manner, so that the fluid transmitting member and the on-off valve are not rotated even if the flow path rotating body rotates.

In the case of the second and third configurations, the opening / closing valve need not be placed in the axial direction of the flow path of the flow path turning crystal, but only in parallel, and the inflow end of the fluid transferring member and the distribution tube, So that it is placed on the rotation axis of the flow path forming crystal, thereby achieving a satisfactory operation.

As one specific embodiment of the present invention, the flow path crystallization body may be formed with an internal passage having a continuous surface from the surface facing the second chamber toward the discharge passage, and the distribution tube may be disposed in the internal passage have.

The distribution tube is disposed inside the flow path crystal revolution body and rotates together, but moves in the longitudinal direction within the flow path revolution body according to the operation of the opening / closing valve. Particularly, since the distribution tube has its inlet end portion and outlet end portion directed in different directions, the distribution tube can be bent and arranged in the flow path crystal rotation body.

By forming the surface of the passage inside the flow path crystal rotating body in which such a distribution tube is disposed as a continuous surface, movement and bending of the distribution tube in the longitudinal direction can be smoothly performed when the distribution tube is bent and arranged.

In another embodiment of the present invention, it is preferable that a tapered sealing surface is formed at an inlet of each discharge passage in contact with the third chamber, and the outlet end of the distribution tube is configured to be in close contact with the sealing surface.

According to the movement of the distribution tube, the outlet end portion of the distribution tube and the discharge flow passage come into contact with each other to supply the fluid. By forming the inlet of the discharge flow passage with a tapered surface, the watertightness between the distribution tube and the discharge flow passage becomes high.

In a further embodiment of the present invention, the fluid transmitting member is composed of a cylindrical tube, one end of which is connected to the second chamber side surface of the plug of the on-off valve and the other end is formed as a fluid outlet, The fluid may be coupled to the second chamber and a fluid inlet may be formed in the peripheral surface of the second chamber.

According to this configuration, the fluid transmitting member can be formed as a cylindrical tube with a simple structure, and can be easily manufactured at low cost, and the assembly with the opening / closing valve and the distribution tube is facilitated.

1 is a longitudinal sectional view and a transverse sectional view showing the configuration of a flow path switching valve according to an embodiment of the present invention,
Fig. 2 is a vertical sectional view and a cross-sectional view showing a state in which the flow path switching valve shown in Fig. 1 is opened and fluid is supplied.

Hereinafter, the configuration and operation of a flow path switching valve according to a preferred embodiment of the present invention will be described with reference to the drawings.

First, referring to Fig. 1, a specific configuration of the flow path switching valve of this embodiment will be described. Fig. 1 (a) is a longitudinal sectional view of the flow path switching valve cut in the longitudinal direction, and Fig. 1 (b) is a cross-sectional view taken along the line A-A in Fig.

A first chamber 11, a second chamber 12, a third chamber 13, and a servo motor chamber 15 (not shown) are provided in the housing 10. The solenoid valve chamber 14, the first chamber 11, ) Are arranged in series.

The first chamber 11 is a fluid that flows from a source of fluid. The first chamber 11 and the second chamber 12 are partitioned from each other by a partition wall 111. A partition wall 111 is formed in the partition wall 111 to allow fluid to flow from the first chamber 11 to the second chamber 12 112 are provided.

The valve stem 21 of the opening and closing valve 20 is opened or closed by the opening and closing valve 20 from the solenoid coil 24 disposed in the solenoid valve chamber 14 to the first chamber 11 And a plug 22 for closing the through hole 112 is formed at an end thereof.

A spring seat 23 is formed at a portion of the valve stem 21 disposed within the solenoid valve chamber 14 to have a diameter larger than that of the valve stem 21. The spring seat 23 and the solenoid valve chamber 14 ) Is disposed between the first chamber 11 and the partition wall 141 that divides the first chamber 11.

When the valve stem 21 of the opening and closing valve 20 is moved toward the second chamber 12 along the longitudinal direction thereof by the solenoid coil 24, the plug 22 is moved to the second chamber 12 So that the through-hole 112 is opened to allow the fluid to flow from the first chamber 11 to the second chamber 12.

When the coil spring 25 is compressed by the movement of the valve stem 21 and the solenoid coil 24 does not act on the valve stem 21, the restoring force of the coil spring 25 causes the valve stem 21, (22) returns to its original position, and the through hole (112) is closed to block the fluid flow to the second chamber (12).

In the second chamber 12, a fluid transmitting member 30 made of a cylindrical tube is disposed. One end of the fluid transmitting member 30 is coupled to the surface of the plug 22 of the opening / closing valve in the second chamber 12.

A fluid inlet 31 is formed in a side surface of the fluid transmitting member 30 so that the fluid flowing into the second chamber 12 flows into the inner space of the fluid transmitting member 30 through the inlet 31 .

The opposite end of the end of the fluid transfer member 30 coupled to the plug 22 of the opening and closing valve functions as an outlet 32 through which the fluid introduced through the inlet 31 is discharged, 12 and the third chamber 13 and protrudes into the third chamber 13. As shown in FIG.

The third chamber 13 is disposed adjacent to the second chamber 12 and six discharge passages 16 are formed radially from the periphery thereof. Each discharge passage 16 is connected to a passage such as a conduit or a hose connected to a place where the fluid is to be supplied.

In this embodiment, six discharge passages 16 are formed, but the number of the discharge passages can be formed in accordance with the demand of the passages for supplying the fluid.

The extension lines of the discharge flow paths 16 are arranged so as to intersect at the center of the third chamber 13. The flow path determination rotary body 40 through which the rotation axis passes at this intersection point is disposed in the third chamber 13.

The channel crystal rotating body 40 is formed in a multi-stage cylindrical shape as a whole. The center portion of the channel crystal rotating body 40 is relatively long in the longitudinal direction so that both end surfaces of the channel crystal rotating body 40 in the longitudinal direction are connected to the partition wall 121, The diameter of the outer periphery of the center portion is formed to be large adjacent to the circumferential surface of the third chamber 13 in which the discharge flow path 16 is formed.

A servomotor chamber 15 of the housing is formed adjacent to the third chamber 13 on the side of the third chamber 13 opposite to the second chamber 12. A servomotor 15 The output shaft 46 of the first and second chambers 45 and 45 protrudes into the third chamber 13 through the partition wall 131 between the third chamber 13 and the servo motor chamber 15 and is coupled to the flow path revolution body 40 , And the flow path determination rotary body 40 is rotated by the rotation of the servo motor 45.

The channel crystal rotating body 40 is formed with an internal passage 42 of a circular cross section extending from the end surface in the longitudinal direction of the second chamber 12 adjacent to the partition wall 121 toward the discharge flow path 16 .

The inner passage 42 extends linearly along the axis of rotation B of the flow path determination rotor 40 from the end face in the longitudinal direction adjacent to the partition wall 121 of the second chamber 12, 16 to the circumference of the channel crystal rotary body 40 which can face each other.

The inner passageway 42 forms a continuous surface with no discontinuous surface at the straight and curved portions and their connection portions, in which the distribution tube 50 is disposed.

One end portion of the distribution tube 50 in the longitudinal direction is protruded from the end surface of the flow path crystallization rotating body 40 and is separated from the second chamber 12 through the partition wall 121 And is connected to an outlet 32 of the fluid transmitting member 30 protruding to the third chamber 13 and constitutes an inflow end 51 into which the fluid flows into the distribution tube 50.

The distribution tube 50 is disposed along the inner passage 42 and the opposite end of the inlet end 51 is disposed near the end of the inner passage 42 facing the discharge passage 16, And the outflow end portion 52 flows out from the outlet end portion.

The arrangement relationship of the opening / closing valve 20, the fluid transmitting member 30, the flow path crystallization rotating body 40 and the distribution tube 50 and the entire operation of the flow path switching valve will be described in detail.

The longitudinal axis of the valve stem 21 of the opening and closing valve 20, the center of the plug 22, the longitudinal axis of the fluid transfer member 30, and the axis of the portion extending linearly from the inlet end 51 in the distribution tube Is placed on the axis of rotation B of the channel crystal rotary body 40.

Therefore, when the flow path determination rotary body 40 rotates about the rotation axis B by the servomotor 45, the distribution tube 50 disposed in the flow path determination rotary body 40 rotates about the rotation axis B And the fluid transfer member 30 and the on-off valve 20, which are coupled to the distribution tube 50, also rotate around the rotation axis B.

The rotation by the servomotor 45 is controlled such that the outlet end 52 of the distribution tube is located at a position facing any one of the discharge flow paths 16 radially provided around the third chamber 13.

In the present embodiment, the distribution tube 50, the fluid transmitting member 30 and the opening / closing valve 20 are coupled to each other to rotate integrally. However, unlike this configuration, the opening / closing valve 20 and the fluid transmitting member 30 The fluid delivery member 30 and the distribution tube 50 are relatively rotatably engaged with each other so that the fluid delivery member 30 and the opening and closing valve 20 do not rotate even if the distribution tube 50 rotates, 30) and the on-off valve 20 does not rotate.

In this case, the axis of the fluid transmitting member 30 is placed on the axis of rotation B of the flow path turning body 40, and the opening / closing valve 20 is positioned in the longitudinal direction of the valve stem 21 Should be arranged so as to be parallel to the rotation axis (B) of the flow path crystal rotating body.

1 shows a state in which the outlet end portion 53 of the distribution tube is opposed to one of the six discharge flow paths 16 by such a constitution. The servomotor 45 is controlled so as to rotate in accordance with the angle at which the discharge passage connected to the passage for supplying the fluid is arranged and the passage regulating rotation body 40 is rotated as shown by the dotted line in FIG. The outlet end (53) of the distribution tube is arranged to face one exhaust flow passage (16).

When the distribution tube 50 faces the discharge passage 16 for supplying the fluid, the opening / closing valve 20 operates to distribute the fluid.

The state in which the fluid supplied to the first chamber 11 is supplied to the discharge passage 16 is shown in Figs. 2 (a) and 2 (b). Figs. 2 (a) and 2 (b) are longitudinal and transverse cross-sectional views similar to Fig.

The solenoid coil 24 of the on-off valve 20 is operated to move the valve stem 21 toward the second chamber 12, As the valve stem 21 moves, the fluid transmitting member 30 and the distribution tube 50 move in the longitudinal direction thereof.

The distribution tube 50 moves along the inner passage 42 of the flow path turning body 40 so that the outlet end portion 52 of the distribution tube 50 protrudes from the inner passage 42 and abuts against the discharge passage 16 facing each other.

1 (a), the end portion of the discharge passage 16 facing the third chamber 13 is formed by the inclined tapered surface 161, and the outlet end portion 52 of the distribution tube, Tightness with respect to the tapered surface (161) and the watertightness of the distribution tube (50) and the discharge passage (16) becomes high.

The through hole 112 between the first chamber 11 and the second chamber 12 is opened in accordance with the movement of the valve stem 21 so that the fluid flows from the first chamber 11 into the second chamber 12, In the second chamber 12, the fluid is introduced into the fluid transfer member 30 through the inlet 31 formed in the side surface of the fluid transfer member and then flows into the inflow end 51 of the distribution tube through the outlet 32 Is supplied to the discharge passage (16) through the outlet end (52) of the distribution tube.

When the operation of the solenoid coil 24 is stopped, the valve stem 21 is returned to its original position by the coil spring 25 to stop the fluid transmission member 30 The distribution tube 50 returns to the position of FIG. 1, and the through-hole 112 between the first chamber and the second chamber 12 is closed by the plug 22 of the on-off valve to stop the fluid supply.

Subsequently, the servomotor 45 is rotated so as to supply the fluid to the other discharge passage, so that the discharge end 52 of the discharge tube 50 faces the other discharge passage.

The multi-directional flow path switching valve of the present embodiment described above can be used for supplying wash water in the washing machine.

The first chamber 11 of the flow path switching valve of the present embodiment is connected to an external wash water supply source such as a water supply, and wash water is supplied from the washing machine to each discharge flow passage 16 formed around the third chamber 13 Connect the euro to the destination.

As a result, the function of supplying and blocking the washing water from the external washing water supply source required for supplying the washing water in the washing machine and the function of selectively distributing the supplied washing water to each device in the washing machine, for example, washing water and detergent box do.

Particularly, when the flow path switching valve according to the present embodiment is applied to a washing machine, it is possible to realize a function of supplying and distributing the washing water in the washing machine by a single valve. The configuration of such a valve is composed of one solenoid The function can be realized only by a rotary motor. In particular, it can be manufactured by a manufacturing process suitable for inexpensive mass production such as injection molding of plastics, without resorting to a high-cost process such as metal precision processing.

In addition, when the flow path switching valve according to the present embodiment is used, it is possible to selectively distribute the fluid having the supply pressure of the water pressure level required by the washing machine to a plurality of flow paths without having a structure for a high level of water tightness.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and alternative arrangements included within the spirit and scope of the appended claims. Are all within the scope of the present invention.

10: housing 20: opening / closing valve
30: fluid transmitting member 40: flow path crystal rotating body
50: distribution tube

Claims (6)

A flow path switching valve for selectively distributing a fluid to a plurality of flow paths,
A first chamber connected to a source of fluid and supplied with fluid;
A second chamber provided adjacent to the first chamber and having a passage formed between the first chamber and the first chamber to supply fluid from the first chamber;
An opening / closing valve including a plug disposed in a passage between the first chamber and the second chamber, the opening / closing valve being capable of opening / closing the fluid flow between the first chamber and the second chamber by the longitudinal movement of the plug;
A third chamber provided adjacent to the second chamber and having a plurality of discharge flow paths formed on the periphery thereof;
The flow path of the flow path of the flow path of the flow path of the flow path of the flow path is changed.
A fluid delivery member that extends from the second chamber to the third chamber and discharges fluid from an inlet disposed in the second chamber and discharged from an outlet disposed in the third chamber;
And is disposed in the flow path crystal revolution body, rotates together with the flow path revolution body, and is connected to the inflow end of the fluid to be connected to the outflow port of the fluid transmission member, A distribution tube having an outflow end of the fluid facing one of the discharge flow paths;
A first driving means for opening and closing the opening and closing valve; And
And a second driving means
Lt; / RTI >
The fluid delivery member is coupled to the opening and closing valve and the inlet end of the distribution tube is coupled to the outlet of the fluid delivery member such that the fluid delivery member and the distribution tube are configured to move longitudinally as the longitudinal movement of the valve closes,
When the opening / closing valve is moved in the opening direction, the fluid transfer member and the distribution tube are moved in the longitudinal direction so that the outlet end of the distribution tube abuts against the opposed discharge flow path, so that the fluid from the first chamber flows into the second chamber, And when the opening / closing valve moves in the closing direction, the outlet end portion of the distribution tube is released from the state in which it comes into contact with the discharge flow passage. The method according to claim 1,
The fluid transfer member and the distribution tube are rotated together with the rotation of the flow path determination rotary body, Wherein the flow control valve is configured to control the valve. The method according to claim 1,
Wherein the longitudinal axis of the on-off valve is parallel to the axis of rotation of the flow path turning body, the longitudinal axis of the fluid transfer member and the inflow end of the distribution tube are on the axis of rotation of the flow path turning body, And the fluid transfer member or the fluid transfer member and the distribution tube are coupled to each other so as to be rotatable relative to each other. The method according to claim 1,
Wherein an inner passage having a continuous surface is formed in the channel crystal rotary body from the surface facing the second chamber toward the discharge passage, and the distribution tube is disposed in the inner passage. The method according to claim 1,
Wherein a tapered sealing surface is formed at the inlet of each of the discharge passages in contact with the third chamber and the outlet end of the distribution tube can be brought into close contact with the sealing surface. The method according to claim 1,
The fluid transfer member is constituted by a cylindrical tube, one end of which is coupled to the second chamber side surface of the plug of the opening / closing valve and the other end is formed into a fluid outlet and is fluidly coupled to the inlet end of the distribution tube, Wherein an inlet of the fluid is formed on a peripheral surface of the flow path switching valve.

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