Mixing valve

Abstract

A mixing valve (1) is provided with: a housing (2) in which a valve chamber (6) is formed; and a rotor (4) rotatably inserted in the valve chamber (6), the first peripheral wall (12) of the housing (2) being provided with: a first inlet port (14) opening to the valve chamber (6) at a first opening (22); and a second inlet port (16) that opens to the valve chamber (6) at a second opening (24), a first inflow pipe (32), a second inflow pipe (34), and a mixing pipe (36) in which a mixing flow path (38) is formed are provided on a second peripheral wall (30) of the rotor (4), and the mixing pipe (36) opens in the radial direction of the rotor (4), communicates with the first inflow pipe (32) and the second inflow pipe (34), and into which the mixed fluid (MF) flows. A first peripheral wall (12) of a housing (2) is provided with: a discharge port (20) that discharges discharge fluid (DF) that flows into a valve chamber (6) without passing through a first inflow pipe (32) and / or a second inflow pipe (34) of a rotor (4); and an outlet port (18) communicating with the mixing flow path (38).

Description

Technical Field

[0001] The present invention relates to a mixing valve, and more particularly to a mixing valve capable of mixing different fluids at a predetermined flow rate ratio to obtain a desired mixed fluid. Background Art

[0002] Patent document 1 discloses a flow control valve capable of adjusting the ratio of cold water and hot water to obtain warm water of a desired temperature. The flow control valve is used in a hot water supply device, etc., and comprises a valve body having a cylindrical valve chamber and a valve core rotatably inserted in the valve chamber. The valve body comprises: two side ports for cold water and hot water to flow in, respectively; and a bottom port for mixed warm water to flow out. Each side port opens to the valve chamber, and the opening area of ​​each side port changes with the rotation of the valve core, thereby adjusting the ratio of cold water and hot water to be mixed. Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2010-1925 Summary of the invention Technical problem to be solved by the invention

[0004] If the opening area of ​​each side port, in other words, each inlet port, decreases with the rotation of the valve core, the flow of the fluid on the upstream side of each inlet port stagnates. For example, it is assumed that there is a heat exchanger for adjusting the temperature of the fluid on the upstream side of the flow control valve, in other words, the mixing valve. In this case, the flow path is narrowed in the mixing valve, so that the flow of the fluid stagnates, and the heat exchange efficiency of the fluid in the heat exchanger may be reduced. Therefore, a mixing valve is required that can minimize the impact on the equipment arranged on the upstream side by not hindering the flow of the upstream side fluid.

[0005] In addition, the bottom port, in other words, the outlet port, is extended in the axial direction of the valve core, so the height dimension of the mixing valve becomes larger. In addition, when a hose or the like is connected to each inlet port and outlet port, the connection direction of the hose is divided into the radial direction and the axial direction of the valve core, so the handling of the hose becomes complicated, and the workability when installing the mixing valve is deteriorated. In addition, since the hose or the like connected to each inlet port and outlet port cannot be compactly wound, it is difficult to achieve space saving around the mixing valve.

[0006] The present invention has been made in view of the above problems, and aims to provide a mixing valve that can minimize the influence on the equipment arranged on the upstream side by not hindering the flow of the fluid on the upstream side, and can achieve compactness and space saving, and can also improve the workability of the installation. Technical solutions adopted to solve technical problems

[0007] In order to achieve the above-mentioned object, the mixing valve of the present invention comprises: a cylindrical shell, in which a valve chamber is formed; and a rotor, which is rotatably inserted in the valve chamber, the shell is provided with: a first inlet port on the first peripheral wall of the shell, the first inlet port is opened in the valve chamber with a first opening, and a first fluid is allowed to flow in; and a second inlet port is opened in the valve chamber with a second opening, and a second fluid is allowed to flow in, the rotor is provided with: a first inlet pipe connected to the first opening; a second inlet pipe connected to the second opening; and a mixing tube on the second peripheral wall of the rotor, the mixing tube is formed with a mixing flow path for the first fluid and / or the second fluid to flow as a mixed fluid, the mixing tube is opened in the radial direction of the rotor, and is connected to the first inlet pipe and the second inlet pipe and allows the mixed fluid to flow in, and the first peripheral wall of the shell is provided with: a discharge port, the discharge port discharges the first fluid and / or the second fluid that flow into the valve chamber respectively without passing through the first inlet pipe and / or the second inlet pipe of the rotor as a discharge fluid to the outside of the shell; and an outlet port, the outlet port is connected to the mixing tube.

[0008] In addition, it is preferred that the outlet port is opened in the valve chamber so as to have a third opening, and the mixing tube has: a connecting portion connected to the second peripheral wall; and an open end that slides with the inner peripheral surface of the outer shell as the rotor rotates, and the opening area of ​​the open end of the mixing tube has a size that is connected to the entire area of ​​the third opening in the entire rotation area of ​​the rotor.

[0009] In addition, preferably, the mixing tube has a tube expansion shape in which the third peripheral wall thereof expands in diameter from the connecting portion toward the opening end. In addition, preferably, the first inlet port, the second inlet port, the outlet port, and the discharge port are arranged to protrude radially from the first peripheral wall toward the shell on the same radial surface of the shell.

[0010] In addition, it is preferred that when the intersection angle between a first line connecting the rotation center of the rotor and the radial center of the first opening and a second line connecting the rotation center and the radial center of the second opening on the same radial plane is defined as the fluid inflow angle, and the intersection angle between a third line connecting the rotation center and the radial center of the opening of the first inflow pipe and a fourth line connecting the rotation center and the radial center of the opening of the second inflow pipe on the same radial plane is defined as the fluid mixing angle, the fluid mixing angle is smaller than the fluid inflow angle. Effects of the Invention

[0011] According to the present invention, a mixing valve can be provided which can minimize the influence on the equipment arranged on the upstream side by not hindering the flow of the fluid on the upstream side, can be made compact and space-saving, and can improve the workability of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a perspective view of a mixing valve according to one embodiment of the present invention. Figure 2 yes Figure 1 A longitudinal section view of a mixing valve. Figure 3 is from Figure 2 A perspective view of the rotor viewed from direction A. Figure 4 yes Figure 3 Cross-sectional view of the rotor in the BB direction. Figure 5 yes Figure 1 Cross-sectional view of the mixing valve in the CC direction. Figure 6 It is a cross-sectional view of the mixing valve when the first communication region is the entire region of the first opening. Figure 7 It is a cross-sectional view of the mixing valve when the second communication region is the entire region of the second opening. Figure 8 This is a graph showing the flow rate ratio of the first fluid and the second fluid in the mixed fluid according to the rotational position of the rotor. Fig. 9 It is a graph showing the flow rate ratio of the first fluid and the second fluid in the discharged fluid according to the rotational position of the rotor. Fig.10 This is a structural diagram of a temperature control system provided with a mixing valve. Fig.11 It is a cross-sectional view of a mixing valve according to a modified example. Fig.12 It is a perspective view of a rotor according to a modified example. Fig.13 yes Fig.12 Cross-sectional view of the rotor. DETAILED DESCRIPTION

[0013] Figure 1 A perspective view showing a mixing valve 1 according to an embodiment of the present invention is shown. Figure 2 Show Figure 1 1 is a longitudinal sectional view of a mixing valve 1. The mixing valve 1 includes: a cylindrical housing 2 as a valve body (valve body); and a rotor 4 as a valve core. A valve chamber 6 is formed inside the housing 2, and the rotor 4 is rotatably inserted into the valve chamber 6. In detail, the rotor 4 has an upper drive shaft 4a and a lower pipe portion 4b. The drive shaft 4a is driven to rotate by an actuator such as a stepping motor (not shown).

[0014] The housing 2 is formed, for example, by welding an upper cover member 2a and a lower cylindrical member 2b. The drive shaft 4a of the rotor 4 is rotatably supported on the inner peripheral surface of the cover member 2a of the housing 2 via a shaft seal device 10. The shaft seal device 10 is composed of a sealing member such as an O-ring and a bearing member such as a bearing, and the valve chamber 6 is sealed and divided in the housing 2 by the shaft seal device 10.

[0015] The first peripheral wall 12 formed on the cylindrical member 2b is provided with a first inlet port 14, a second inlet port 16, an outlet port 18, and a discharge port 20. In the present embodiment, the first inlet port 14, the outlet port 18, the second inlet port 16, and the discharge port 20 are sequentially provided on the first peripheral wall 12. Figure 1 The positions substantially at an angle of 90 degrees in the counterclockwise circumferential direction when viewed from the center are all protruded from the first circumferential wall 12 in the radial direction of the housing 2 .

[0016] In detail, each port 14, 16, 18, 20 is provided on the same radial surface of the housing 2 to protrude from the first peripheral wall 12 in the radial direction of the housing 2. The first inlet port 14 is opened to the valve chamber 6 with a first opening 22, and the first fluid F1 is allowed to flow in. The second inlet port 16 is opened to the valve chamber 6 with a second opening 24, and the second fluid F2 is allowed to flow in. The outlet port 18 is opened to the valve chamber 6 with a third opening 26, and is connected to the mixing tube 36 described later, so that the mixed fluid MF of the first fluid F1 and / or the second fluid F2 flows out. The discharge port 20 is opened to the valve chamber 6 with a fourth opening 28, and the discharge fluid DF flows out.

[0017] Figure 3 Shown from Figure 2 A perspective view of the rotor 4 viewed from the direction A, Figure 4 Show Figure 3 The second peripheral wall 30 formed in the tube portion 4b of the rotor 4 is provided with: a first inflow pipe 32 for the first fluid F1 to flow in from the first inlet port 14; a second inflow pipe 34 for the second fluid F2 to flow in from the second inlet port 16; and a mixing pipe 36 for the mixed fluid MF to flow out.

[0018] In the present embodiment, the first inflow pipe 32, the mixing pipe 36, and the second inflow pipe 34 are sequentially connected to the second peripheral wall 30. Figure 3 and Figure 4 The first inlet pipe 32, the second inlet pipe 34 and the mixing pipe 36 are all protruded from the second circumferential wall 30 in the radial direction of the rotor 4 at a position substantially at an angle of 90 degrees in the counterclockwise circumferential direction when viewed in the middle. In detail, the first inlet pipe 32, the second inlet pipe 34 and the mixing pipe 36 are protruded from the second circumferential wall 30 in the radial direction of the tube portion 4b of the rotor 4 on the same radial surface.

[0019] The mixing tube 36 is formed with a mixing flow path 38 for the mixed fluid MF to flow. In addition, the mixing tube 36 has: a connection portion 40 connected to the second peripheral wall 30; and an open end 42, which is closed by a sealing member 54 (see Figure 5 ) is in sliding contact with the inner peripheral surface of the housing 2. In addition, the mixing tube 36 has an expanded tube shape in which the third peripheral wall 44 thereof expands in diameter from the connecting portion 40 toward the open end 42. In addition, the mixing tube 36 of the present embodiment has a slightly flattened expanded tube shape.

[0020] Figure 5 Show Figure 1 The first inlet pipe 32 is connected to the mixing flow path 38, and the first communication area 46 of the first inlet pipe 32 connected to the first opening 22 changes with the rotation of the rotor 4. In addition, the second inlet pipe 34 is connected to the mixing flow path 38, and the second communication area 48 of the second inlet pipe 34 connected to the second opening 22 changes with the rotation of the rotor 4.

[0021] Here, in the case of this embodiment, a first non-communication region 50 may be formed at the first opening 22. The first non-communication region 50 communicates with the valve chamber 6 in accordance with the rotation of the rotor 4, and does not communicate with the first inflow pipe 32. On the other hand, a second non-communication region 52 may be formed at the second opening 24. The second non-communication region 52 communicates with the valve chamber 6 in accordance with the rotation of the rotor 4, and does not communicate with the second inflow pipe 34.

[0022] The first fluid F1 and / or the second fluid F2 respectively flowing into the valve chamber 6 through the first non-connected area 50 and / or the second non-connected area 52 flow in the space of the valve chamber 6 on the lower side of the rotor 4, and are discharged as the exhaust fluid DF to the outside of the housing 2 through the exhaust port 20. That is, the first fluid F1 flowing in from the first opening 22 and not passing through the first inflow pipe 32 flows into the valve chamber 6, and the second fluid F2 flowing in from the second opening 24 and not passing through the second inflow pipe 34 flows into the valve chamber 6, the first fluid F1 and the second fluid F2 are mixed in the valve chamber 6, and are discharged as the exhaust fluid DF to the outside of the housing 2 through the exhaust port 20.

[0023] The exhaust fluid DF is appropriately used in the temperature control system 56 described later. Figure 5 As shown, sealing components 54 are respectively installed on the inner circumferential surfaces near the first opening 22, the second opening 24 and the third opening 26 of the cylindrical component 2b of the shell 2, and the first inlet pipe 32, the second inlet pipe 34 and the mixing pipe 36 slide smoothly with the sealing component 54 as the rotor 4 rotates, and the sealing component 54 tightly seals the valve chamber 6.

[0024] On the other hand, the first fluid F1 flowing through the first communication area 46 of the first inlet pipe 32 and the second fluid F2 flowing through the second communication area 48 of the second inlet pipe 34 flow in the mixing flow path 38 formed in the mixing pipe 36 of the rotor 4, and flow out from the outlet port 18 as a mixed fluid MF. The mixed fluid MF is appropriately used in the temperature control system 56 described later. Figure 5 In the case shown, the ratio of the area of ​​the first connecting area 46 to the area of ​​the first opening 22, in other words, the opening of the first inflow pipe 32 is 50%. In addition, the ratio of the area of ​​the second connecting area 48 to the area of ​​the second opening 24, in other words, the opening of the second inflow pipe 34 is 50%. The rotation position of the rotor 4 in this case is called R2.

[0025] Figure 6 FIG. 4 is a cross-sectional view of the mixing valve 1 in which the first communication region 46 is the entire region of the first opening 22. Figure 6 In the case shown, the opening degree of the first inflow pipe 32 is 100%, the opening degree of the second inflow pipe 34 is 0%, and the first fluid F1 that has flowed only through the first communication region 46 of the first inflow pipe 32 flows in the mixing flow path 38 and flows out from the outlet port 18. On the other hand, the second fluid F2 that has passed through the second non-communication region 52 flows through the space of the valve chamber 6 on the lower side of the rotor 4 and is discharged from the discharge port 20 as the discharge fluid DF. In addition, the rotation position of the rotor 4 in this case is referred to as R1.

[0026] Figure 7 FIG. 4 is a cross-sectional view of the mixing valve 2 in which the second communication region 48 is the entire region of the second opening 24. Figure 7 In the case shown, the opening degree of the first inflow pipe 32 is 0%, the opening degree of the second inflow pipe 34 is 100%, and only the second fluid F2 flowing through the second communication area 48 of the second inflow pipe 34 flows in the mixing flow path 38 and flows out from the outlet port 18. On the other hand, the first fluid F1 passing through the first non-communication area 50 flows through the space of the valve chamber 6 on the lower side of the rotor 4, and is discharged from the discharge port 20 as the discharge fluid DF. In addition, the rotation position of the rotor 4 in this case is referred to as R3.

[0027] Figure 8 A graph showing the flow rate ratio of the first fluid F1 and the second fluid F2 in the mixed fluid MF according to the rotational position of the rotor 4 is shown. Fig. 9 4 shows a graph showing the flow rate ratio of the first fluid F1 and the second fluid F2 in the discharge fluid DF corresponding to the rotational position of the rotor 4. At the rotational position R1, as Figure 6 As also shown, the first fluid F1 accounts for 100% of the mixed fluid MF. In this case, in the conventional case, the second opening 24 of the second inlet port 16 is completely blocked by the rotor 4, and the second fluid F2 is blocked.

[0028] Therefore, conventionally, the flow of the second fluid F2 on the upstream side of the second inlet port 16 is completely stagnant. However, in the case of the present embodiment, at the rotation position R1, the discharge fluid DF, which is 100% of the second fluid F2, is made to flow into the valve chamber 6 and be discharged from the discharge port 20. Thus, the flows of both the first fluid F1 and the second fluid F2 on the upstream side of the mixing valve 1 are not hindered.

[0029] On the other hand, at the rotation position R2, as Figure 5 As also shown, the first fluid F1 and the second fluid F2 each account for 50% in the mixed fluid MF. Therefore, in the past, the flow of the first fluid F1 on the upstream side of the first inlet port 14 and the flow of the second fluid F2 on the upstream side of the second inlet port 16 were stagnant at 1 / 2 respectively. However, in the case of this embodiment, at the rotation position R2, the discharge fluid DF, which is 50% each of the first fluid F1 and the second fluid F2, is made to flow into the valve chamber 6 and be discharged from the discharge port 20. As a result, the flow of both the first fluid F1 and the second fluid F2 on the upstream side of the mixing valve 1 is not hindered.

[0030] On the other hand, at the rotation position R3, as Figure 7 As also shown, the second fluid F2 accounts for 100% of the mixed fluid MF. Therefore, in the past, the flow of the first fluid F1 on the upstream side of the first inlet port 14 was completely stagnant. However, in the case of this embodiment, at the rotation position R3, the discharge fluid DF, which accounts for 100% of the first fluid F1, is made to flow into the valve chamber 6 and be discharged from the discharge port 20. As a result, the flow of both the first fluid F1 and the second fluid F2 on the upstream side of the mixing valve 1 is not hindered.

[0031] Thus, even if the rotation position of the rotor 1 is any, the flow of both the first fluid F1 and the second fluid F2 on the upstream side of the mixing valve 1 will not be hindered, thereby minimizing the impact on the equipment disposed on the upstream side of the mixing valve 1. Figures 5 to 7 As is clear, the opening area of ​​the open end 42 of the mixing tube 36 has a size that allows communication with the entire area of ​​the third opening 26 of the outlet port 18 throughout the entire rotational range of the rotor 4 .

[0032] In addition, if Figure 6As shown, when a first line L1 connecting the rotation center C of the rotor 4 and the radial center of the first opening 22 and a second line L2 connecting the rotation center C and the radial center of the second opening 24 are set on the same radial surface of the housing 2, the intersection angle on the side of the area where the discharge port 20 is provided is defined as the fluid inflow angle α. In addition, a third line L3 (at the radial center of the opening of the first inflow pipe 32) connecting the rotation center C and the radial center of the opening of the first inflow pipe 32 is set on the same radial surface of the housing 2. Figure 6 In the case of a fourth line L4 connecting the rotation center C and the radial center of the opening of the second inlet pipe 34, the intersection angle on the side of the area where the discharge port 20 is provided is defined as the fluid mixing angle β.

[0033] At this time, the fluid mixing angle β and the fluid inflow angle α are set to different angles, and preferably, the fluid mixing angle β is set to be smaller than the fluid inflow angle α. In the case of the present embodiment, the fluid mixing angle β is an obtuse angle (about 120 degrees) less than 180 degrees, and on the other hand, the fluid inflow angle α is substantially 180 degrees. In the mixing valve 1, by establishing such a relationship between the fluid inflow angle α and the fluid mixing angle β, it is possible to ensure that the area between the first inlet port 14 and the second inlet port 16 is wider than the rotation area of ​​the rotor 4 centered on the rotation center C. Therefore, the first non-connected area 50 and / or the second non-connected area 52 can be formed, so that the first fluid F1 and / or the second fluid F2 flows into the valve chamber 6 and is discharged from the discharge port 20 as the discharge fluid DF.

[0034] Fig.10 1 is a block diagram of a temperature control system 56 provided with a mixing valve 1. The temperature control system 56 is installed in a vehicle such as an electric vehicle or a hybrid vehicle, and includes a radiator cooling water circuit 58 and a battery cooling water circuit 60. In the radiator cooling water circuit 58, a heat exchange portion 62 of a cooling heat exchanger, an electric pump 64, a mixing valve 1, and a radiator 66 are interposed in order in the water flow direction.

[0035] In the radiator cooling water circuit 58, the cooling water cooled by the heat exchange unit 62 is sent out by the electric pump 64 and flows into the first inlet port 14 of the mixing valve 1 as the first fluid F1. Then, the cooling water as the discharge fluid DF is sent to the radiator 66 from the discharge port 20, and the cooling water is used to dissipate heat of the equipment installed in the vehicle.

[0036] On the other hand, in the battery cooling water circuit 60, the heat exchange section 68 of the heating heat exchanger, the electric pump 70, the mixing valve 1, the battery 72, and the electric powertrain 74 are interposed in order in the water flow direction. In the battery cooling water circuit 60, the warm water heated by the heat exchange section 68 is sent out by the electric pump 70 and flows into the second inlet port 16 of the mixing valve 1 as the second fluid F2. Then, the warm water as the mixed fluid MF is sent to the battery 72 from the outlet port 18, and the warm water heats the battery 72 exposed to the low temperature environment.

[0037] The water after heating the battery 72 is sent to the electric powertrain 74 and used for heat dissipation of the inverter, motor, etc. constituting the electric powertrain 74. In the temperature control system 56, the flow rate ratio of the first fluid F1 (cooling water) and the second fluid F2 (warm water) in the mixed fluid MF is changed by the rotation of the rotor 4, thereby cooling the battery 72 even in a high temperature environment and during long-term driving of the vehicle.

[0038] Furthermore, as described above, even if the rotation position of the rotor 4 is any position, the flow of both the first fluid F1 and the second fluid F2 on the upstream side of the mixing valve 1 is not hindered. Therefore, on the upstream side of the mixing valve 1, the flow of the first fluid F1 and the second fluid F2 does not stagnate, and thus, it is possible to prevent the heat exchange efficiency in the heat exchange parts 62 and 68 disposed on the upstream side of the mixing valve 1 from being reduced.

[0039] As described above, the mixing valve 1 of the present embodiment sometimes has a first non-connected area 50 formed at the first opening 22 of the first inlet port 14, and the first non-connected area 50 is connected to the valve chamber 6 in accordance with the rotation of the rotor 4, but is not connected to the first inlet pipe 32. In addition, sometimes a second non-connected area 52 is formed at the second opening 24 of the second inlet port 16, and the second non-connected area 52 is connected to the valve chamber 6 in accordance with the rotation of the rotor 4, but is not connected to the second inlet pipe 34.

[0040] The first fluid F1 and / or the second fluid F2 that respectively flow into the valve chamber 6 through the first non-connected area 50 and / or the second non-connected area 52 are discharged to the outside of the housing 2 as the discharge fluid DF via the discharge port 20. Therefore, even if the rotation position of the rotor 4 is any position, the flow of both the first fluid F1 and the second fluid F2 on the upstream side of the mixing valve 1 is not hindered. Therefore, the influence on the equipment arranged on the upstream side of the mixing valve 1 can be suppressed to a minimum, and specifically, the reduction of the heat exchange efficiency in the heat exchange parts 62 and 68 as described above can be prevented.

[0041] Furthermore, the first peripheral wall 12 of the housing 2 is provided with a discharge port 20 for discharging the discharge fluid DF and an outlet port 18 that is connected to the mixing pipe 36 and for discharging the mixed fluid MF, in addition to the first inlet port 14 for the first fluid F1 to flow in and the second inlet port 16 for the second fluid F2 to flow in. That is, by providing all of the ports 14, 16, 18, 20 on the first peripheral wall 12 of the housing 20, the axial length of the rotor 4 can be shortened, and therefore, the height dimension of the mixing valve 1 can be reduced as much as possible, and the mixing valve 1 can be made significantly more compact.

[0042] In addition, the ports 14, 16, 18, and 20 are arranged along the circumferential direction of the first peripheral wall 12 of the housing 2, so that the handling of the hoses and the like connected to the ports 14, 16, 18, and 20 becomes easy, and the workability when installing the mixing valve 1 can be improved. In addition, the hoses and the like connected to the ports 14, 16, 18, and 20 can be compactly wound along the circumferential direction of the first peripheral wall 12, so that the space around the mixing valve 1 can be saved.

[0043] Furthermore, the first inlet port 14, the second inlet port 16, the outlet port 18, and the discharge port 20 are provided on the same radial surface of the housing 2 so as to protrude from the first peripheral wall 12 in the radial direction of the housing 2. Thus, the above-mentioned mixing valve 1 can be made more compact, the workability when installing the mixing valve 1 can be improved, and the space around the mixing valve 1 can be saved.

[0044] In addition, the opening area of ​​the open end 42 of the mixing tube 36 is large enough to communicate with the entire area of ​​the third opening 26 of the outlet port 18 in the entire rotation area of ​​the rotor 4. Therefore, even if the rotation position of the rotor 4 is at any position, the flow of the mixed fluid MF is not hindered, and therefore, the influence on the equipment arranged on the upstream side of the mixing valve 1 can be further reliably suppressed.

[0045] Furthermore, the mixing tube 36 has an expanded tube shape in which the third peripheral wall 44 expands in diameter from the connection portion 40 toward the open end 42. Thus, the opening area of ​​the open end 42 of the mixing tube 36 can be ensured, and the diameters of the drive shaft 4a and the tube portion 4b of the rotor 4 can be reduced. Therefore, the compactness of the mixing valve 1 can be further effectively promoted.

[0046] In addition, when defining the above-mentioned fluid inflow angle α and fluid mixing angle β, the fluid mixing angle β is smaller than the fluid inflow angle α. As a result, the area between the first inlet port 14 and the second inlet port 16 can be ensured to be wider than the rotation area of ​​the rotor 4 centered on the rotation center C. Therefore, the first non-connected area 50 and / or the second non-connected area 52 can be formed, so that the first fluid F1 and / or the second fluid F2 flows into the valve chamber 6 and is discharged from the discharge port 20 as the discharge fluid DF.

[0047] Therefore, by setting the positions of the first inlet port 14 and the second inlet port 16 in the casing 2 and the positions of the first inlet pipe 32 and the second inlet pipe 34 in the rotor 4 so that the fluid mixing angle β is smaller than the fluid inflow angle α, a mixing valve 1 can be realized which does not hinder the flow of the fluid on the upstream side and can minimize the impact on the equipment arranged on the upstream side.

[0048] The above is a description of an embodiment of the present invention, but the present invention is not limited thereto and various changes can be made without departing from the scope of the present invention. Fig.11 As shown, a rotor 4 having a fluid mixing angle β of substantially 180 degrees may also be used. In this case, the second inlet port 16 may be protruded and arranged at the following position: a position substantially having an angle greater than 180 degrees from the first inlet port 14 along the clockwise circumferential direction of the first peripheral wall 12.

[0049] Thus, the fluid inflow angle α is larger than 180 degrees, and therefore, the fluid mixing angle β is smaller than the fluid inflow angle α. Therefore, in this case, the above-mentioned relationship between the fluid inflow angle α and the fluid mixing angle β also holds, and thus, a mixing valve 1 that does not hinder the flow of the fluid on the upstream side can be realized. Fig.11 The first inlet port 14 , the second inlet port 16 , the outlet port 18 , and the discharge port 20 are not provided to protrude from the first peripheral wall 12 in the radial direction of the housing 12 , as shown in the second inlet port 16 .

[0050] In addition, the mixing tube 36 is in the shape of an expanded tube. However, the mixing tube 36 may also be a tube in which the third peripheral wall 44 does not expand from the connecting portion 40 toward the opening end 42, for example, Fig.12 and Fig.13 The square tube shape shown in the figure may also be a simple tube shape. In addition, the mixing valve 1 of this embodiment is not limited to the mixing of cooling water and warm water in the above-mentioned temperature control system 56, and can be used for mixing various fluids including gases, not limited to liquids, in systems that perform various adjustments not limited to temperature adjustment. (Explanation of symbols)

[0051] 1Mixing valve 2 Shell 4 rotors 6 valve chamber 12First wall 14First entry port 16 Second entry port 18 export ports 20 discharge port 22 First Opening 24 Second opening 26 The third opening 30 Second peripheral wall 32 first inflow pipe 34 Second inflow pipe 36 Mixing tube 38 Mixing flow path 40 connection part 42 Open end 44 The third wall 46 First connected area 48 Second connected area 50 The first disconnected area 52 Second non-connected area C Rotation Center F1 First Fluid F1 Second Fluid MF mixed fluid DF discharge fluid L1 First Line L2 Second Line L3 Third Line L4 Fourth Line α Fluid inflow angle β Fluid mixing angle.

Claims

1. A mixing valve, characterized in that: have: a cylindrical housing having a valve chamber formed therein; and a rotor, wherein the rotor is rotatably inserted into the valve chamber, The housing has a first inlet port on a first peripheral wall of the housing, the first inlet port is opened to have a first opening in the valve chamber and allows a first fluid to flow in; and a second inlet port, the second inlet port being opened to have a second opening in the valve chamber and allowing a second fluid to flow in, The rotor has, on a second peripheral wall of the rotor: a first inflow pipe communicating with the first opening; a second inlet pipe communicating with the second opening; and a mixing pipe, the mixing pipe forming a mixing flow path for the first fluid and / or the second fluid to flow as a mixed fluid, The mixing tube opens in the radial direction of the rotor and is connected to the first inlet tube and the second inlet tube for the mixed fluid to flow in. The first peripheral wall of the housing is provided with: a discharge port, the discharge port discharges the first fluid and / or the second fluid that flow into the valve chamber respectively without passing through the first inlet pipe and / or the second inlet pipe of the rotor to the outside of the housing as discharge fluid; and an outlet port communicating with the mixing tube.

2. The mixing valve according to claim 1, characterized in that: The outlet port opens to have a third opening in the valve chamber, The mixing tube has: a connection portion connected to the second peripheral wall; and an open end that slides with the inner peripheral surface of the housing as the rotor rotates. The opening area of ​​the open end of the mixing tube has a size that communicates with the entire area of ​​the third opening in the entire rotation area of ​​the rotor.

3. The mixing valve according to claim 2, characterized in that: The mixing tube has an expanded tube shape in which a third peripheral wall of the mixing tube expands in diameter from the connecting portion toward the open end.

4. The mixing valve according to claim 2 or 3, characterized in that: The first inlet port, the second inlet port, the outlet port, and the exhaust port are provided on the same radial surface of the housing and protrude from the first peripheral wall in a radial direction of the housing.

5. The mixing valve according to claim 4, characterized in that: The intersection angle between a first line connecting the rotation center of the rotor and the radial center of the first opening and a second line connecting the rotation center and the radial center of the second opening on the same radial plane is defined as a fluid inflow angle, When the intersection angle between a third line connecting the rotation center and the radial center of the opening of the first inlet pipe and a fourth line connecting the rotation center and the radial center of the opening of the second inlet pipe on the same radial plane is defined as the fluid mixing angle, The fluid mixing angle is smaller than the fluid inflow angle.

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