Flow path switching valve

Abstract

This flow path switching valve is provided with: a valve unit that is provided with a valve body in which a first inlet and outlet and a second inlet and outlet through which a fluid flows in and out are formed in the wall surface forming a valve chamber, and a third inlet and outlet formed in the bottom surface of the valve chamber, a valve body that is rotatably disposed in the valve chamber, and a first flow path, a second flow path, and a third flow path that is rotatably disposed in the valve chamber; a first flow path communicating with the first inlet / outlet, a second flow path disposed in parallel with the first flow path across the valve body and communicating with the second inlet / outlet, and a third flow path communicating with the third inlet / outlet and having an opening on the opposite side to the third inlet / outlet; and a rotation drive unit that is connected to the valve unit and rotates the valve body, and the flow path switching valve is configured so as to be able to be connected to the first flow path and the second flow path of another valve unit, respectively, in the first flow path and the second flow path of the valve unit, and to be connected to the first flow path and the second flow path of the other valve unit.

Description

Technical Field

[0001] The present invention relates to a flow path switching valve. Background Art

[0002] The specification of Chinese Patent Application Publication No. 111828682 discloses a control valve (flow path switching valve) having a valve core that rotates in a valve body and having five or more ports (pipe joints).

[0003] However, in the above-mentioned conventional example, the number of connection ports and the combination of flow paths are fixed according to the specifications, so there is no degree of freedom, and if the specifications are changed, it is considered that a new design is required. Summary of the invention

[0004] Problems to be solved by the invention

[0005] An object of the present invention is to easily realize a flow path switching valve of various specifications.

[0006] Means for solving problems

[0007] A flow path switching valve of a first embodiment comprises: a valve unit, the valve unit having a valve body, a valve core, a first flow path, a second flow path and a third flow path, the valve body forming a valve chamber inside, and a first inlet and a second inlet and a second inlet for respectively entering and exiting a fluid are formed on a wall surface forming the valve chamber, and a third inlet and a second inlet are formed on a bottom surface of the valve chamber, the valve core is rotatably arranged in the valve chamber, and a flow path is formed, the first flow path is connected to the first inlet and the second inlet, the second flow path is arranged in parallel with the first flow path across the valve body and is connected to the second inlet and the third flow path is connected to the third inlet and the third inlet is opened on the side opposite to the third inlet and the third inlet; and a rotation driving unit connected to the valve unit to rotate the valve core so that the connection state of the first inlet and the second inlet and the third inlet is switched through the flow path of the valve core, and the flow path switching valve is configured to be able to connect the first flow path and the second flow path of the valve unit respectively and connect the first flow path and the second flow path of the other valve unit.

[0008] In the flow path switching valve, by rotating the valve core using the rotary drive unit, the communication state of the first inlet and outlet, the second inlet and outlet, and the third inlet and outlet of the valve chamber can be switched through the flow path of the valve core. Since the first flow path and the second flow path of one valve unit can be respectively connected and linked to the first flow path and the second flow path of other valve units, flow path switching valves of various specifications can be easily realized by combining valve units.

[0009] According to the flow path switching valve of the first aspect, in the second aspect, a female connector is provided at one end of each of the first flow path and the second flow path, and a male connector connectable to the female connector is provided at the other end of each of the first flow path and the second flow path.

[0010] In the flow path switching valve, a female connector is provided at one end of the first flow path and the second flow path, respectively, and a male connector that can be connected to the female connector is provided at the other end of the first flow path and the second flow path, respectively. Therefore, for example, the first flow paths of one valve unit and the second flow paths of another valve unit can be easily connected to each other.

[0011] According to the flow path switching valve of the first aspect or the second aspect, in a third aspect, the third flow path has a curved portion, and a spherical recessed portion is provided at a portion of the curved portion that faces the third inlet and outlet.

[0012] The fluid flowing from the valve chamber through the third inlet and outlet into the third flow path passes through the curved portion. In the flow path switching valve, a spherical concave portion is provided at a portion of the curved portion of the third flow path that is opposite to the third inlet and outlet, so that the resistance of the fluid is reduced compared to a structure in which there is no concave portion at this portion and only the curve is provided. Therefore, the pressure loss in the third flow path can be suppressed.

[0013] According to the flow path switching valve of any one of the first to third aspects, in a fourth aspect, a rib extending in a direction toward the third port is formed in the flow path of the valve body.

[0014] In the flow path switching valve, a rib extending in the direction toward the third inlet and outlet is formed in the flow path of the valve core, so that the fluid flowing in the valve core can be rectified. In addition, when the valve core is assembled into the valve chamber, the direction of the valve core can be easily adjusted by applying force to the rib.

[0015] According to the flow path switching valve of any one of the first to fourth modes, in the fifth mode, a first protrusion protruding from the first inlet and outlet side toward the interior of the first flow path is provided at the connection portion of the first flow path connected to the first inlet and outlet, and a second protrusion protruding from the second inlet and outlet side toward the interior of the second flow path is provided at the connection portion of the second flow path connected to the second inlet and outlet.

[0016] In the flow path switching valve, a first protrusion is provided at a connection portion of the first flow path connected to a first inlet and outlet of the valve chamber, so that the fluid flowing in the first flow path can be guided to the first inlet and outlet. In addition, a second protrusion is provided at a connection portion of the second flow path connected to a second inlet and outlet of the valve chamber, so that the fluid flowing in the second flow path can be guided to the second inlet and outlet. In this way, the inflow of the fluid from the first flow path and the second flow path into the valve chamber can be promoted.

[0017] According to the flow path switching valve of any one of the first to fifth aspects, in a sixth aspect, the other valve unit can be overlapped and connected to one valve unit on the side opposite to the rotation drive portion.

[0018] In this flow path switching valve, by overlapping and connecting another valve unit on the side of one valve unit opposite to the rotation drive portion, the degree of freedom in combining the valve units can be increased.

[0019] According to the flow path switching valve of the sixth aspect, in a seventh aspect, a portion of one of the valve units that overlaps with the other valve units is formed as a cover that closes the valve chamber of the other valve unit.

[0020] In the flow path switching valve, a portion of one valve unit that overlaps with another valve unit is formed as a cover for closing the valve chamber of the other valve unit, so when one valve unit is overlapped with another valve unit, no other component for closing the valve chamber of the other valve unit is required. Therefore, the increase in the number of components can be suppressed, and the operability when overlapping and connecting the valve units can be improved.

[0021] According to the flow path switching valve of the sixth aspect or the seventh aspect, in an eighth aspect, one of the valve units is overlapped and connected to the other valve unit, and the two valve elements in the two valve units are rotated by one rotation drive unit.

[0022] In this flow path switching valve, since two valve elements in two overlapping valve units are rotated by one rotation drive unit, the number of components and the cost can be reduced compared to a case where rotation drive units are provided separately in the two valve units.

[0023] According to the flow path switching valve of any one of the sixth to eighth modes, in the ninth mode, the center-to-center distance between the end of the first flow path and the end of the second flow path in one of the valve units is equal to the center-to-center distance between the ends of the first flow path in the overlapping direction when one of the valve units is overlapped and connected with other valve units.

[0024] In this flow path switching valve, when two other overlapping valve units are connected and linked in the direction of the first flow path and the second flow path of the two overlapping valve units, not only the first flow paths can be connected to each other, the second flow paths can be connected to each other, but also the first flow path can be connected to the second flow path. Therefore, the degree of freedom of combination of valve units can be further improved.

[0025] According to the flow path switching valve of any one of the first to ninth aspects, in a tenth aspect, a secondary flow path is provided at a position opposing the first inlet and outlet in the first flow path, and the flow path switching valve is configured to be connectable to a storage tank in the secondary flow path.

[0026] According to the flow path switching valve of any one of the first to tenth aspects, in an eleventh aspect, a pump can be installed in each of the first flow path and the second flow path.

[0027] According to the flow path switching valve of the third aspect, in the twelfth aspect, a through hole is formed at the bottom of the recessed portion, and the through hole is closed by a closing portion including a temperature sensor.

[0028] Effects of the Invention

[0029] According to the present invention, flow path switching valves of various specifications can be easily realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a perspective view showing the overall structure of a flow path switching valve according to one embodiment of the present invention.

[0031] Figure 2 This is a perspective view showing an example in which a storage tank is attached to the flow path switching valve.

[0032] Figure 3 This is a perspective view showing an example in which a storage tank and a pump are attached to a flow path switching valve.

[0033] Figure 4 This is a partially cutaway perspective view showing a flow path switching valve in which two valve units are stacked and two valve elements are rotated by one rotation drive unit.

[0034] Figure 5 It is a partially cutaway perspective view showing the valve unit.

[0035] Figure 6 It is a partially cutaway perspective view showing the valve unit.

[0036] Figure 7 This is a front view showing a state where the valve unit is viewed from the male joint side of the first flow path.

[0037] Figure 8 This is a partial cross-sectional view showing a state in which the second flow path is cut along the radial direction, while viewing the valve unit from the opening side of the third flow path.

[0038] Fig. 9 This is a front view showing the valve core.

[0039] Fig.10 It is a bottom view showing the valve core.

[0040] Fig.11It is an enlarged cross-sectional view showing a state in which an opening provided in the middle of the first flow path is closed by a cover member.

[0041] Fig.12 This is a cross-sectional view showing a structure in which, in a flow path switching valve having two valve units stacked together, a portion of one valve unit that overlaps with the other valve unit is formed as a cover that closes the valve chamber of the other valve unit.

[0042] Fig.13 It is a cross-sectional view showing a flow path switching valve according to Modification 1.

[0043] Fig.14 It is a cross-sectional view showing a flow path switching valve according to Modification 1.

[0044] Fig.15 It is a perspective view showing a flow path switching valve according to a second modification.

[0045] Fig.16 It is a perspective view showing a flow path switching valve according to a second modification.

[0046] Fig.17 It is a partially cutaway perspective view showing a flow path switching valve according to a third modification.

[0047] Fig.18 It is a perspective view showing a flow path switching valve according to a fourth modification.

[0048] Fig.19 This is a block diagram showing one switching pattern of the flow path switching valve according to Modification 4.

[0049] Fig. 20 This is a block diagram showing another switching mode of the flow path switching valve according to Modification 4.

[0050] Fig.21 It is a perspective view showing a flow path switching valve according to Modification 5.

[0051] Fig. 22 This is a block diagram showing one switching pattern of the flow path switching valve according to Modification 5.

[0052] Fig.23 This is a block diagram showing another switching mode of the flow path switching valve according to Modification 5.

[0053] Fig.24 It is a perspective view showing a flow path switching valve according to a sixth modification.

[0054] Fig.25 This is a block diagram showing one switching mode of the flow path switching valve according to Modification 6.

[0055] Fig.26 This is a block diagram showing another switching mode of the flow path switching valve according to Modification 6.

[0056] Fig. 27 It is a perspective view showing a flow path switching valve according to a seventh modification. DETAILED DESCRIPTION

[0057] Hereinafter, the mode for implementing the present invention will be described based on the accompanying drawings. The constituent elements represented by the same reference numerals in the various drawings refer to the same constituent elements. In addition, in the embodiments described below, repeated descriptions and reference numerals are sometimes omitted. In addition, the drawings used in the following description are all schematic drawings, and the relationship between the dimensions of the elements shown in the drawings, the ratio of the elements, etc. may not be consistent with the actual situation. In addition, the relationship between the dimensions of the elements, the ratio of the elements, etc. may not be consistent between multiple drawings.

[0058] In addition, in this specification, descriptions indicating positions and directions such as up and down, left and right, front and back are used as Figure 1 The direction arrows are for reference only and do not refer to the actual position or direction under use. Figure 1 In the figure, "U" indicates the upper direction (upper side), "D" indicates the lower direction (lower side), "LH" indicates the left direction (left side), "RH" indicates the right direction (right side), "F" indicates the front direction (front side), and "R" indicates the rear direction (rear side). "Up and down direction" refers to the arrow U direction and the arrow D direction. "Left and right direction" refers to the arrow LH direction and the arrow RH direction. And, "front and rear direction" refers to the arrow F direction and the arrow R direction.

[0059] Figure 1 1 is a perspective view showing the overall structure of a flow path switching valve 10 according to an embodiment of the present invention. In the flow path switching valve 10, three valve units 20 are connected in the left-right direction, and other valve units 20 are overlapped on the lower side of each valve unit 20. In other words, six valve units 20 are combined. Figure 4 2 is a partially cutaway perspective view showing a flow path switching valve in which two valve units 20 are stacked and two valve elements are rotated by one rotation drive unit. Figure 4 Equivalent to Figure 1 The diagrams of the upper and lower valve units 20 are extracted. Figure 5 , Figure 6 It is a partially cutaway perspective view showing one valve unit 20 .

[0060] The flow path switching valve 10 is used as a rotary three-way valve ( Figure 5 ) or four-way valve ( Fig.13 , Fig.14 ).like Figures 4 to 8 As shown, the flow path switching valve 10 includes a valve unit 20 and a rotation drive unit 18 .

[0061] [Valve unit]

[0062] The valve unit 20 includes a valve body 14, a valve element 16, a first flow path 21, a second flow path 22, and a third flow path 23. Figure 5 In the example shown, the valve unit 20 is, for example, a three-way valve that switches the state in which the first flow path 21 and the third flow path 23 are connected, the state in which the second flow path 22 and the third flow path 23 are connected, and the state in which the first flow path 21, the second flow path 22 and the third flow path 23 are not connected to each other.

[0063] (Valve body)

[0064] exist Figure 6 In the embodiment, the valve body 14 is made of, for example, synthetic resin, and a valve chamber 12 is formed inside. The valve chamber 12 is open in the upper direction, and a valve core 16 and a sealing portion 38 described later are inserted from the upper direction. A first inlet and outlet 31 and a second inlet and outlet 32, for example, which are opposite to each other and respectively allow fluid to enter and exit, are formed on the wall surface forming the valve chamber 12. As an example, the first inlet and outlet 31 is formed on the wall surface in the rear direction of the valve chamber 12, and the second inlet and outlet 32 ​​is formed on the wall surface in the front direction of the valve chamber 12. That is, the first inlet and outlet 31 and the second inlet and outlet 32 ​​are opposite to each other in the front-to-back direction of the valve chamber 12. In addition, a third inlet and outlet 33 is formed on the bottom surface of the valve chamber 12.

[0065] (Valve core)

[0066] exist Figure 4 , Figure 5 , Fig. 9 , Fig.10 In the embodiment, the valve core 16 is a spherical member made of, for example, synthetic resin, and is rotatably disposed in the valve chamber 12. An insertion hole 16A is formed at the upper portion of the valve core 16, into which the valve shaft 28 in the rotation drive unit 18 is inserted. The valve shaft 28 and the insertion hole 16A engage with each other around the axial direction of the valve shaft 28, and the rotation of the valve shaft 28 is transmitted to the valve core 16. The insertion hole 16A, for example, passes through the flow path 36 of the valve core 16.

[0067] In order to selectively connect the first inlet 31, the second inlet 32, and the third inlet 33 of the valve body 14, in other words, to selectively switch the connection state of the first inlet 31, the second inlet 32, and the third inlet 33, a flow path (internal flow path) 36 is provided inside the valve core 16. Fig. 9 As shown in FIG. 1 , a transverse hole 36A is formed in the valve core 16, which leads from the outer periphery (side) thereof to the flow path 36. In addition, a bottom hole 36C is formed in the valve core 16, which leads from the outer periphery (lower part) thereof to the flow path 36. The flow path 36 is connected from the transverse hole 36A to the bottom hole 36C. Depending on the state of the valve core 16, the transverse hole 36A can be opposite to the first inlet and outlet 31 or the second inlet and outlet 32. In a state where neither inlet and outlet is opposite to the transverse hole 36A, the valve core 16 is in a state of being in close contact with the sheet member 40 described later and closed.

[0068] like Fig. 9 , Fig.10 As shown, the flow path 36 of the valve body 16 is provided with a rib 16B extending in the direction (vertical direction) toward the third port 33. The rib 16B is, for example, a thin plate-like protrusion, and is formed on the inner wall of the lateral hole 36A in the flow path 36 of the valve body 16.

[0069] exist Figure 4 , Figure 5 In the embodiment, a sealing portion 38 for sealing each other is provided between the valve core 16 and the first inlet and outlet 31 and the second inlet and outlet 32. The sealing portion 38 includes, for example, a sheet member 40 and an O-ring 42. The sheet member 40 is made of, for example, a synthetic resin and is formed into a circular ring shape having openings corresponding to the first inlet and outlet 31 and the second inlet and outlet 32. The sheet members 40 are respectively arranged around the first inlet and outlet 31 and the second inlet and outlet 32 ​​in the inner wall surface of the valve body 14 (the front and rear wall surfaces of the valve chamber 12). The valve core 16 is clamped by two sheet members 40 and is arranged to be able to rotate and slide freely while being in contact with each sheet member 40.

[0070] The sheet member 40 and the valve body 14 are sealed, for example, air-tightly or water-tightly, by O-rings 42. The O-rings 42 are mounted in, for example, O-ring grooves (not shown) formed in the sheet member 40.

[0071] As an example, PPS (polyphenylene sulfide) can be used for the valve body 14 and the valve element 16 , PTFE (fluororesin) can be used for the sheet member 40 , and synthetic rubber can be used for the O-ring 42 .

[0072] (Rotation drive unit)

[0073] exist Figure 4 In the embodiment, the rotary drive unit 18 is connected to the valve unit 20 and rotates the valve core 16 so that the communication states of the first inlet and outlet 31, the second inlet and outlet 32, and the third inlet and outlet 33 are selectively switched through the flow path of the valve core 16. The rotary drive unit 18 is arranged above the valve body 14 of the upper valve unit 20. Specifically, a bracket 24 is fixed to the upper valve body 14, and the rotary drive unit 18 is fixed to the valve body 14 using, for example, a screw 26 ( Figure 1 ) is fixed to the bracket 24. The upper opening ( Figure 5 ) is enclosed by bracket 24, for example ( Fig.12). In other words, the bracket 24 has a shape that closes the opening of the valve chamber 12. The bracket 24 is welded in a state of being embedded in the inner side of the opening of the valve chamber 12. The bracket 24 is provided with a protrusion 30. The protrusion 30 is opposite to or abuts against the edge around the valve chamber 12 in the valve body 14. The protrusion 30 may also be a molten residue. In addition, the protrusion 30 may be provided on the valve body 14 instead of the bracket 24.

[0074] The rotary drive unit 18 is, for example, a geared motor. The rotary drive unit 18 is provided with, for example, a connector 50 connected to wiring for communication with a control unit and power supply. The rotary drive unit 18 is combined with a valve shaft 28 as an output shaft. The valve shaft 28 is inserted into a through hole 24A formed in the bracket 24. An O-ring 29 or an X-ring (not shown) is installed on the valve shaft 28. The O-ring 29 ensures water tightness between the valve shaft 28 and the through hole 24A. In addition, the lower end of the valve shaft 28 is inserted into the insertion hole 16A ( Figure 5 ).

[0075] (First flow path, second flow path, third flow path)

[0076] exist Figures 4 to 6 In the embodiment, the first flow path 21, the second flow path 22, and the third flow path 23 are, for example, tubes integrally formed with the valve body 14. The first flow path 21 may be referred to as a first port, the second flow path 22 as a second port, and the third flow path 23 as a third port.

[0077] The first flow path 21 is open at both ends, for example, and communicates with the first inlet and outlet 31 of the valve chamber 12. The first flow path 21 extends linearly in the left-right direction, for example. The first inlet and outlet 31 is connected to the middle of the first flow path 21. Thus, the first flow path 21 and the first inlet and outlet 31 form a substantially T-shape in a plan view (see FIG. 2 ). Fig.13 , Fig.14 ).

[0078] The second flow path 22 is arranged in parallel with the first flow path 21 across the valve body 14, and is, for example, open at both ends and communicates with the second inlet and outlet 32. The second flow path 22 extends linearly in the left-right direction, for example. The second inlet and outlet 32 ​​is connected to the middle of the second flow path 22. Thus, the second flow path 22 and the second inlet and outlet 32 ​​form a substantially T-shape when viewed from above (see FIG. 1 ). Fig.13 , Fig.14 ).

[0079] like Figure 1 As shown, female connectors 51 and 52 are provided at one end of the first flow path 21 and the second flow path 22, respectively. Figure 5 , Figure 6As shown in FIG. 1 , male connectors 61 and 62 are provided at the other ends of the first flow path 21 and the second flow path 22, respectively. The male connectors 61 and 62 are formed to be connectable to the female connectors 51 and 52. Annular grooves 61A and 62A are formed on the outer peripheries of the male connectors 61 and 62. In addition, a pair of arc-shaped slits 51A and 52A are formed on the female connectors 51 and 52. Fig.13 , Fig.14 As shown in FIG. 1 , the male connectors 61 and 62 are respectively inserted into the female connectors 51 and 52, and the clamping member 34 is inserted into the grooves 61A and 62A through the slits 51A and 52A to prevent the clamping member 34 from being disengaged. The watertightness of the connection part of each connector is performed by, for example, an O-ring 66. By having such a connector structure, it is configured to be able to connect the first flow path 21 and the second flow path 22 of one valve unit 20 to the first flow path 21 and the second flow path 22 of another valve unit 20 (see FIG. 1 ). Figure 1 , Fig.13 , Fig.14 ). In addition, this joint structure is an example, and any other joint structure can be used.

[0080] exist Figures 6 to 8 , Fig.13 , Fig.14 In the figure, a first protrusion 71 protruding from the first entrance 31 side toward the inside of the first flow path 21 is provided at a connection portion of the first flow path 21 connected to the first entrance 31. The first protrusion 71 is, for example, an arc-shaped protrusion formed along the first entrance 31 relative to the opening of the first flow path 21. The range of the first protrusion 71 is, for example, set to be smaller than half of the inner circumference of the first flow path 21 on the first entrance 31 side. A single surface of the first protrusion 71 in the left-right direction is made into a concave surface extending a portion of the inner wall of the first flow path 21. In the example shown in the figure, the first protrusion 71 is provided on the left side of the first entrance 31. In addition, the first protrusion 71 may be provided on the right side of the first entrance 31, or may be provided on both the left and right sides of the first protrusion 71.

[0081] In addition, a second protrusion 72 protruding from the second inlet and outlet 32 ​​side toward the inside of the second flow path 22 is provided at the connection portion of the second flow path 22 connected to the second inlet and outlet 32. The second protrusion 72 is, for example, an arc-shaped protrusion formed along the second inlet and outlet 32 ​​relative to the opening of the second flow path 22. The range of the second protrusion 72 is, for example, set to be smaller than half of the inner circumference of the second flow path 22 on the second inlet and outlet 32 ​​side. One side of the second protrusion 72 in the left-right direction is made into a concave surface extending a part of the inner wall of the second flow path 22. In the example shown in the figure, the second protrusion 72 is provided on the left side of the second inlet and outlet 32. In addition, the second protrusion 72 may be provided on the right side of the second inlet and outlet 32, or may be provided on both the left and right sides of the second protrusion 72.

[0082] like Figure 1 , Figure 2 , Figure 4 , Fig. 9 As shown, a secondary flow path 46 closed by a cover body 44 may be provided in the first flow path 21, for example, at a position opposite to the first inlet and outlet 31. The cover body 44 and the end of the secondary flow path 46 are sealed by welding, or water is stopped by a sealing member such as an O-ring 48. The secondary flow path 46 can also be used by removing the cover body 44. The secondary flow path 46 can be connected to a storage tank 54, for example. When the valve unit 20 is overlapped up and down, there are two secondary flow paths 46 in the upper and lower parts. The two secondary flow paths 46 can also be connected to a storage tank 54 having two connection ports ( Figure 2 In this case, the storage tank 54 may also have two storage chambers corresponding to the respective connection ports and separated from each other. Thus, even if it is the same fluid, fluids of different temperatures can be stored separately.

[0083] In addition, pumps 81 and 82 can be installed at the female joint 51 or male joint 61 of the first flow path 21 at the end of the flow path switching valve 10 and at the female joint 52 or female joint 62 of the second flow path 22 at the end of the flow path switching valve 10, respectively. Figure 3 In the example shown, the pump 81 is mounted on the female connector 51 of the first flow path 21 in the upper valve unit 20 (see Figure 2 ). In addition, the pump 82 is mounted on the female connector 52 of the second flow path 22 in the upper valve unit 20. The pump 81 has a connector 91 that serves as an inlet and outlet of the fluid. In addition, the pump 82 has a connector 92 that serves as an inlet and outlet of the fluid. The pump 81 can supply a fluid from other equipment to the first flow path 21 via the connector 91, or supply the fluid of the first flow path 21 to other equipment. In addition, the pump 82 can supply a fluid from other equipment to the second flow path 22 via the connector 92, or supply the fluid of the second flow path 22 to other equipment.

[0084] exist Figure 4 , Figure 5 , Figure 7 In the embodiment, the third flow path 23 is connected to the third inlet and outlet 33 and is open on the side opposite to the third inlet and outlet 33. Specifically, the third flow path 23 has a curved portion 23A. The third inlet and outlet 33 is located above the curved portion 23A. The end of the opening side of the third flow path 23 is located, for example, in front of the curved portion 23A, for example, protruding forward than the second flow path 22. A male connector 64, for example, which can be connected to a pipe to other equipment, is provided at the end of the opening side of the third flow path 23.

[0085] like Figure 4 , Figure 5As shown, a spherical recess 23B is provided at a portion of the curved portion 23A of the third flow path 23 that is opposite to the third inlet and outlet 33, that is, below the third inlet and outlet 33. The recess 23B is formed in a substantially hemispherical shape. The recess 23B is recessed downward compared to the bottom 23C of the transverse flow path that is closer to the front side than the curved portion 23A. Thus, a portion of the fluid that enters the third flow path 23 from the third inlet and outlet 33 temporarily falls into the recess 23B and then enters the transverse flow path of the third flow path 23.

[0086] exist Figure 5 In the example shown, a through hole 23D is formed at the bottom of the recess 23B. The valve shaft 58 can pass through the through hole 23D ( Figure 4 ). The valve shaft 58 and the through hole 23D are sealed by an O-ring 60. When no other valve unit is overlapped below, such as Figure 4 The valve unit 20 on the lower side of the recess 23B may be configured such that there is no through hole 23D at the bottom of the recess 23B. In addition, even if the through hole 23D is provided, the through hole 23D may be closed by another member (for example, a closing portion 86). For example, the closing portion 86 may also include a temperature sensor 84. The temperature sensor 84 is supported on the closing portion 86, for example, and is configured so that the top end is located in the third flow path 23. For example, an O-ring 88 is installed in the closing portion 86. The watertightness between the closing portion 86 and the through hole 23D is ensured by the O-ring 88. By using the temperature sensor 84, the temperature in the third flow path 23 can be accurately measured.

[0087] [Overlap of valve units]

[0088] exist Figure 1 , Figure 4 In this embodiment, it is possible to overlap and connect another valve unit 20 on the side opposite to the rotation drive unit 18 of one valve unit 20. The portion of the upper valve unit 20 that overlaps with the lower valve unit 20 is formed into a cover 68 that closes the valve chamber 12 of the lower valve unit 20. This closed structure is similar to Fig.12 The sealing structure of the valve chamber 12 by the bracket 24 is substantially the same, and the bottom of the upper valve body 14 is welded in a state of being fitted inside the opening of the valve chamber 12 in the lower valve body 14 .

[0089] In addition, if Figure 4As shown, it is also possible to have a structure in which other valve units 20 are overlapped and connected on one valve unit 20, and two valve cores 16 in the two valve units 20 are rotated by one rotation drive unit 18. In this example, the valve shaft 28 of the upper valve unit 20 is connected to the valve shaft 58 of the lower valve unit 20 by a connecting shaft 56. The connecting shaft 56 connects the upper and lower valve shafts 28 and 58 through the interior of the upper valve core 16 and the longitudinal flow path of the third flow path 23. When the upper valve shaft 28 is driven to rotate by the rotation drive unit 18, the rotation is transmitted to the lower valve shaft 58 via the connecting shaft 56, and the upper and lower valve cores 16 rotate synchronously.

[0090] Furthermore, the rotation drive section 18 may be provided in each of the upper and lower valve units 20 to individually control the rotation of the valve element 16 .

[0091] exist Figure 1 In the embodiment, the center-to-center distance W between the end of the first flow path 21 and the end of the second flow path 22 in one valve unit 20 may be equal to the center-to-center distance H between the ends of the first flow path 21 in the overlapping direction when one valve unit 20 is overlapped and connected with other valve units 20. In other words, W=H may be satisfied.

[0092] (effect)

[0093] This embodiment is constructed as described above, and its function will be described below. Figure 4 In the flow path switching valve 10 of the present embodiment, by rotating the valve core 16 using the rotation drive unit 18, for example, the communication state of the first inlet and outlet 31, the second inlet and outlet 32, and the third inlet and outlet 33 of the valve chamber 12 can be switched through the flow path 36 of the valve core 16. The first inlet and outlet 31 and the second inlet and outlet 32 ​​are opposite to each other across the valve chamber 12, and a horizontal hole 36A is formed in the valve core 16, so the flow path can be switched by rotating the valve core 16 by 180 degrees.

[0094] The first flow path 21 and the second flow path 22 of one valve unit 20 are respectively connected and linked to the first flow path 21 and the second flow path 22 of other valve units 20, so that flow path switching valves of various specifications can be easily realized by combining the valve units 20. Specifically, female connectors 51 and 52 are respectively provided at one end of the first flow path 21 and the second flow path 22, and male connectors 61 and 62 are respectively provided at the other end of the first flow path 21 and the second flow path 22. The male connectors 61 and 62 can be connected to the female connectors 51 and 52, respectively. Therefore, for example, it is easy to connect the first flow paths 21 of one valve unit 20 to each other and the second flow paths 22 to each other of the other valve units 20.

[0095] exist Figure 1For example, when W=H, when two overlapping valve units 20 are connected in the direction of the first flow path 21 and the second flow path 22, and two other overlapping valve units 20 are connected, not only the first flow paths 21 and the second flow paths 22 can be connected, but also the first flow path 21 and the second flow path 22 can be connected. In other words, the two valve units 20 can be connected by rotating them 90 degrees. Therefore, the degree of freedom of the combination of the valve units 20 can be further improved.

[0096] In addition, the fluid flowing from the valve chamber 12 into the third flow path 23 through the third port 33 passes through the curved portion 23A. When a spherical concave portion 23B is provided at a portion of the curved portion 23A of the third flow path 23 that is opposite to the third port 33, the resistance of the fluid is reduced compared to a structure in which there is no concave portion 23B at this portion and only a bend is provided. Therefore, the pressure loss in the third flow path 23 can be suppressed.

[0097] Moreover, if Fig. 9 , Fig.10 As shown, when the flow path 36 of the valve core 16 is formed with a rib 16B extending in the direction toward the third port 33, the fluid flowing in the valve core 16 can be rectified. When the valve core 16 is assembled into the valve chamber 12, the direction of the valve core 16 can be easily adjusted by applying force to the rib 16B.

[0098] In addition, if Figures 6 to 8 , Fig.13 , Fig.14 As shown, when the first protrusion 71 is provided at the connection portion of the first flow path 21 connected to the first inlet and outlet 31 of the valve chamber 12, the first protrusion 71 is used to disturb the flow of the fluid in the first flow path 21. As a result, the fluid flowing in the first flow path 21 can be guided to the first inlet and outlet 31. In addition, when the second protrusion 72 is provided at the connection portion of the second flow path 22 connected to the second inlet and outlet 32 ​​of the valve chamber 12, the flow of the fluid in the second flow path 22 can be disturbed by the second protrusion 72, and the fluid flowing in the second flow path 22 can be guided to the second inlet and outlet 32. In this way, the inflow of the fluid from the first flow path 21 and the second flow path 22 into the valve chamber 12 can be promoted.

[0099] Moreover, if Figure 1 , Figure 4 As shown, by being able to overlap and connect another valve unit 20 on the side of one valve unit 20 opposite to the rotation drive unit 18 , the degree of freedom in combining the valve units 20 can be increased.

[0100] When the portion of one valve unit 20 that overlaps with the other valve unit 20 is formed as a cover 68 that closes the valve chamber 12 of the other valve unit 20, when the one valve unit 20 is overlapped with the other valve unit 20, no other component is required for closing the valve chamber 12 of the other valve unit 20. Therefore, the increase in the number of components can be suppressed, and the workability when the valve units 20 are overlapped and connected can be improved.

[0101] When the two valve elements 16 in the two stacked valve units 20 are rotated by one rotation drive unit 18 , the number of components and the cost can be reduced compared to the case where the rotation drive unit 18 is provided in each of the two valve units 20 .

[0102] As described above, according to the present embodiment, flow path switching valves of various specifications can be easily realized.

[0103] (Variant 1)

[0104] The valve unit 20 is not limited to a three-way valve. Fig.13 , Fig.14 As shown, for example, a four-way valve may be used. In this case, the valve core 16 is provided with a transverse hole 36B that merges with the center of the transverse hole 36A from its outer periphery (side) and is formed, for example, in a direction orthogonal to the rotation axis O1 of the valve core 16 and to the transverse hole 36A. By rotating the valve core 16 by 90°, the state in which the first inlet and outlet 31 is connected to the third inlet and outlet 33 and the state in which the second inlet and outlet 32 ​​is connected to the third inlet and outlet 33 can be switched.

[0105] (Variant 2)

[0106] exist Fig.15 , Fig.16 In the flow path switching valve 10 of this modified example, the structure of the female connectors 51, 52 and the male connectors 61, 62 is similar to Figures 1 to 8 The construction shown is different. Fig.15 , Fig.16 , the same flow path switching valve 10 is shown with the viewpoint changed.

[0107] In this modification, the pipe portion constituting the first flow path 21 is formed separately from the valve body 14 as a component and is joined to the valve body 14 by welding during assembly. The pipe portion constituting the second flow path 22 is formed integrally with the valve body 14 as a component.

[0108] (Variant 3)

[0109] exist Fig.17In the flow path switching valve 10 of this modified example, in one valve unit 20 (the valve unit on the upper side), the valve shaft 28 inserted into the valve core 16 is provided as a separate body from the rod 98 as the output shaft of the rotation drive unit 18. The lower end of the rod 98 is inserted into the valve shaft 28. The rotation of the rod 98 is transmitted to the valve shaft 28. In this modified example, the valve shaft 28 can be shared with the valve shaft 58 of the other valve unit 20 (the valve unit on the lower side).

[0110] In addition, in this modification, unlike modification 2 ( Fig.15 , Fig.16 ) Similarly, the pipe portion constituting the first flow path 21 is formed separately from the valve body 14 in a component state and is combined with the valve body 14 during assembly. In the sealing portion 38 that seals between the valve core 16 and the first and second inlets 31 and 32, the O-ring 42 is installed in the O-ring groove provided in the pipe portion constituting the first flow path 21 and the O-ring groove provided in the valve body 14, respectively.

[0111] (Variant 4)

[0112] exist Fig.18 In the present modification, the flow path switching valve 10 is a combination of two modification examples 2 ( Fig.15 , Fig.16 ) is connected to form an assembly of valve units 20. The assembly of valve units 20 is composed of two valve units 20 stacked together. Fig.18 The valve unit 20 (I) and the valve unit 20 (II) are sequentially provided from the left side of the valve unit 20 (I). The portion of the valve unit 20 (I) is indicated by a single-dot chain line, and the portion of the valve unit 20 (II) is indicated by a double-dot chain line. The valve unit 20 (I) is installed by rotating 90 degrees relative to the valve unit 20 (II). Accordingly, the positions of the rotation drive unit 18 are also different from each other.

[0113] exist Fig.18 In the embodiment, on the rotation drive unit 18 side of the valve unit 20 (II), the right end of the second flow path is set as port A, and the right end of the first flow path is set as port B. In addition, on the side of the valve unit 20 (II) opposite to the rotation drive unit 18, the right end of the second flow path is set as port C, and the right end of the first flow path is set as port D.

[0114] The third flow path is provided as a port G on the rotary drive unit 18 side of the valve unit 20 (I). The third flow path is provided as a port H on the side opposite to the rotary drive unit 18 side of the valve unit 20 (I).

[0115] and Figure 4Similarly, in the valve units 20(I) and 20(II), when the rotation drive unit 18 is used to rotationally drive the rod 98 and the upper valve shaft 28, the rotation is transmitted to the lower valve shaft 58 via the connecting shaft 56, and the upper and lower valve cores 16 rotate synchronously. Fig.19 , Fig. 20 In the figure, the solid lines representing the flow represent the flow in the valve units 20(I) and 20(II). The dotted lines represent the flow outside the valve units, i.e., the external flow path. In addition, regarding the lines representing the flow, the thick lines represent the parts with flow, and the thin lines represent the parts without flow. The same applies to the following modified examples.

[0116] According to this modification, for example, Fig.19 , Fig. 20 The two switching modes are shown.

[0117] exist Fig.19 In the switching mode shown, port A is connected to port E, and port B is connected to port G. In addition, port C is connected to port H, and port D is connected to port F. Port A and port H, port B and port E, port C and port F, port D and port G are cut off respectively. In addition, other unused ports are also cut off. At this time, when an external flow path is formed that connects port A and port C, port B and port D, port E and port F, and port G and port H respectively, a series flow path (series loop) returning to port A through ports A, E, F, D, B, G, H, and C can be formed. A heat exchanger, an evaporator, a condenser, a battery, a motor, etc. can be configured in the external flow path.

[0118] exist Fig. 20 In the switching mode shown, port A is connected to port H, and port B is connected to port E. In addition, port C is connected to port F, and port D is connected to port G. Port A and port E, port B and port G, port C and port H, and port D and port F are disconnected, respectively. In addition, other unused ports are also disconnected. At this time, when an external flow path is formed that connects port A and port C, port B and port D, port E and port F, and port G and port H, respectively, a series flow path (series circuit) that returns to port A through ports A, H, G, D, B, E, F, and C can be formed.

[0119] (Variant 5)

[0120] exist Fig.21 In the present modification, the flow path switching valve 10 is a combination of the three modification examples 2 ( Fig.15 , Fig.16 The assembly of the valve units 20 is composed of two valve units 20 stacked together. The first flow paths of two valve units 20 in the assembly of three valve units 20 are connected in series, and the second flow paths are connected in series. Fig.21 From the left side of the valve unit 20, valve unit 20 (I) and valve unit 20 (II) are set in order. In addition, the third valve unit 20 is set as valve unit 20 (III). The portion of valve unit 20 (I) is indicated by a thick single-dot chain line, the portion of valve unit 20 (II) is indicated by a double-dot chain line, and the portion of valve unit 20 (III) is indicated by a thin single-dot chain line. Valve unit 20 (III) is Fig.21 Specifically, the third flow path of the valve unit 20 (I) and the valve unit 20 (II) is connected to the first flow path and the second flow path of the valve unit 20 (III).

[0121] exist Fig.21 In the embodiment, on the rotation drive unit 18 side of the valve unit 20 (II), the right end of the second flow path is set as port A, and the right end of the first flow path is set as port B. In addition, on the side of the valve unit 20 (II) opposite to the rotation drive unit 18, the right end of the second flow path is set as port C, and the right end of the first flow path is set as port D.

[0122] On the rotation drive unit 18 side of the valve unit 20 (III), the first flow path is set as port E, the second flow path is set as port G, and the third flow path is set as port J. In addition, on the side of the valve unit 20 (III) opposite to the rotation drive unit 18, the first flow path is set as port F, the second flow path is set as port H, and the third flow path is set as port K.

[0123] According to this modification, for example, Fig. 22 , Fig.23 The two switching modes are shown.

[0124] exist Fig. 22 In the switching mode shown, port A is connected to port E, and port B is connected to port G. In addition, port C is connected to port F, and port D is connected to port H. Moreover, port G is connected to port J, and port H is connected to port K. Port A and port G, port B and port E, port C and port H, port D and port F, port E and port J, port F and port K are cut off respectively. In addition, other unused ports are also cut off. At this time, when an external flow path is formed that connects port A and port C, port B and port D, port E and port F, port G and port H, port J and port K, a series flow path (series circuit) that returns to port A through ports A, E, F, and C can be formed. In addition, a series flow path (series circuit) that returns to port B through ports B, G, J, K, H, and D can be formed.

[0125] exist Fig.23In the switching mode shown, port A is connected to port G, and port B is connected to port E. Port E is also connected to port J. In addition, port C is connected to port H, and port D is connected to port F. Port F is also connected to port K. Port A and port E, port B and port G, port C and port F, port D and port H, port G and port J, port H and port K are cut off respectively. In addition, unused ports are also cut off. At this time, when an external flow path is formed that connects port A and port C, port B and port D, port E and port F, port G and port H, port J and port K, a series flow path (series circuit) that returns to port A through ports A, G, H, and C can be formed. In addition, a series flow path (series circuit) that returns to port B through ports B, E, J, K, F, and D can be formed.

[0126] Thus, in this modification, two series flow paths (series circuits) can coexist in any switching mode. In addition, the flow can be switched by two switching modes.

[0127] (Variant 6)

[0128] exist Fig.24 In the present modification, the flow path switching valve 10 is a valve in the modification 5 ( Fig.21 ) is obtained by rotating the front valve unit 20 (III) by 90 degrees. Ports A to D are the same as those in the fifth modification.

[0129] On the rotation drive unit 18 side of the valve unit 20 (III), the first flow path is set as port G, the second flow path is set as port H, and the third flow path is set as port J. In addition, on the side of the valve unit 20 (III) opposite to the rotation drive unit 18, the first flow path is set as port E, the second flow path is set as port F, and the third flow path is set as port K.

[0130] According to this modification, for example, Fig.25 , Fig.26 The two switching modes are shown.

[0131] exist Fig.25In the switching mode shown, port A is connected to port E. Port E is also connected to port K. Port B is connected to port G. Port G is also connected to port J. Port A and port G, port B and port E, port C and port F, port D and port H, port F and port K, port H and port J are cut off respectively. In addition, port D is connected to port F, and port C is connected to port H, but the flow of each path is cut off by valve unit (III). In addition, other unused ports are also cut off. At this time, when an external flow path is formed that connects port A and port C, port B and port D, port C and port J, port D and port K, port E and port F, port G and port H, it is possible to form a series flow path (series circuit) that returns to port A through ports A, E, K, D, B, G, J, and C.

[0132] exist Fig.26 In the switching mode shown, port A is connected to port G, and port B is connected to port E. In addition, port C is connected to port F, and port D is connected to port H. Port A and port E, port B and port G, port C and port H, port D and port F, port E and port K, port F and port K, port G and port J, and port H and port J are disconnected, respectively. In addition, other unused ports are also disconnected. At this time, when an external flow path is formed that connects port A and port C, port B and port D, port C and port J, port D and port K, port E and port F, and port G and port H, respectively, a series flow path (series circuit) that returns to port A through ports A, G, H, D, B, E, F, and C can be formed.

[0133] (Variant 7)

[0134] exist Fig. 27 In the present modification, the flow path switching valve 10 is a combination of the three modification examples 2 ( Fig.15 , Fig.16 ) is connected to form an assembly of valve units 20. The assembly of valve units 20 is composed of two valve units 20 stacked together. Fig.18 From the left side of the valve unit 20 (I), the valve unit 20 (II), and the valve unit 20 (III) are arranged in order. In this modified example, the valve unit 20 (II) is installed by rotating 180 degrees relative to the valve units 20 (I) and 20 (III). Fig. 27 In the figure, the rotation drive unit 18 of the valve units 20 (I) and 20 (III) is located at the upper side, whereas the rotation drive unit 18 of the valve unit 20 (II) is located at the lower side. The direction of the opening of the third flow path is also reversed front to back.

[0135] In this way, by combining a plurality of valve units 20 , various circuits can be realized in a compact manner.

[0136] [Other embodiments]

[0137] As mentioned above, an example of the embodiment of the present invention has been described, but the embodiment of the present invention is not limited to the above content, and it is of course possible to implement it with various modifications other than the above within the scope not departing from the gist of the present invention.

[0138] Female connectors 51 and 52 are provided at one end of first flow path 21 and second flow path 22, respectively, and male connectors 61 and 62 that can be connected to female connectors 51 and 52 are provided at the other end of first flow path 21 and second flow path 22, respectively. However, a structure without such a connector structure is also possible.

[0139] The concave portion 23B is provided in the curved portion 23A of the third flow path 23, but the configuration may be such that the concave portion 23B is not provided. The rib 16B is formed in the flow path 36 of the valve body 16, but the configuration may be such that the rib 16B is not provided.

[0140] A first protrusion 71 is provided at a connection portion of the first flow path 21 connected to the first inlet and outlet 31, and a second protrusion 72 is provided at a connection portion of the second flow path 22 connected to the second inlet and outlet 32, but either the first protrusion 71 or the second protrusion 72 may be provided, or neither the first protrusion 71 nor the second protrusion 72 may be provided.

[0141] On the side of one valve unit 20 opposite to the rotation drive unit 18, another valve unit 20 may be overlapped and connected, but another member may be interposed between the two valve units 20. In addition, such connection may not be possible.

[0142] The center-to-center distance W between the end of the first flow path 21 and the end of the second flow path 22 in one valve unit 20 is equal to the center-to-center distance H between the ends of the first flow path 21 in the overlapping direction when one valve unit 20 is overlapped and connected with other valve units 20 (W=H), but the center-to-center distance W may be different from the center-to-center distance H. In addition, in the above-mentioned flow path switching valve, the valve units 20 are overlapped in two layers, but three or more layers may be overlapped.

[0143] The entire disclosure of Japanese Patent Application No. 2022-120887 filed on July 28, 2022 is incorporated into this specification by reference.

[0144] All documents, patent applications, and technical standards described in this specification are incorporated herein by reference to the same extent as if each individual document, patent application, and technical standard was specifically and individually described as being incorporated by reference.

Claims

1. A flow path switching valve, comprising: a valve unit including a valve body, a valve core, a first flow path, a second flow path, and a third flow path, wherein the valve body forms a valve chamber inside, and a first inlet and a second inlet and a second inlet are formed on a wall surface forming the valve chamber, respectively, for fluid to enter and exit, and a third inlet and a third inlet are formed on a bottom surface of the valve chamber, the valve core is rotatably arranged in the valve chamber, and a flow path is formed, the first flow path is communicated with the first inlet and the second flow path is arranged in parallel with the first flow path across the valve body and is communicated with the second inlet and the third flow path is communicated with the third inlet and the third inlet is opened on a side opposite to the third inlet and the third inlet; and a rotation driving unit connected to the valve unit and causing the valve element to rotate so that the communication states of the first inlet and outlet, the second inlet and outlet, and the third inlet and outlet are switched through the flow path of the valve element, The flow path switching valve is configured to be able to connect and couple the first flow path and the second flow path of the valve unit to each of the first flow path and the second flow path of the other valve unit.

2. The flow path switching valve according to claim 1, wherein: A female connector is provided at one end of the first flow path and the second flow path, respectively. A male joint that is connectable to the female joint is provided at the other end of each of the first flow path and the second flow path.

3. The flow path switching valve according to claim 1, wherein: The third flow path has a curved portion, and a spherical concave portion is provided at a portion of the curved portion that faces the third inlet and outlet.

4. The flow path switching valve according to claim 1, wherein: A rib extending in a direction toward the third port is formed in the flow path of the valve body.

5. The flow path switching valve according to claim 1, wherein: A first protrusion that protrudes from the first inlet and outlet toward the inside of the first flow channel is provided at a connection portion of the first flow channel that is connected to the first inlet and outlet. A second protrusion that protrudes from the second inlet and outlet toward the inside of the second flow channel is provided at a connection portion of the second flow channel that is connected to the second inlet and outlet.

6. The flow path switching valve according to claim 1, wherein: The other valve unit is configured to be able to be overlapped and connected to one valve unit on the side opposite to the rotation drive portion.

7. The flow path switching valve according to claim 6, wherein: A portion of one of the valve units that overlaps with the other valve units is formed as a cover that closes the valve chamber of the other valve unit.

8. The flow path switching valve according to claim 6, wherein: One of the valve units is overlapped and connected with the other valve units, The two valve elements in the two valve units are rotated by one rotation drive unit.

9. The flow path switching valve according to claim 6, wherein: The center-to-center distance between the end of the first flow path and the end of the second flow path in one valve unit is equal to the center-to-center distance between the ends of the first flow path in the overlapping direction when one valve unit is overlapped and connected with another valve unit.

10. The flow path switching valve according to claim 1, wherein: A secondary flow path is provided at a position of the first flow path opposite to the first inlet and outlet, The flow path switching valve is configured to be able to connect a storage tank to the secondary flow path.

11. The flow path switching valve according to claim 1, wherein: The first flow path and the second flow path are configured so that pumps can be installed in each of them.

12. The flow path switching valve according to claim 3, wherein: A through hole is formed at the bottom of the recess, The through hole is closed by a closing portion including a temperature sensor.

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