Mixing valve device

Abstract

To provide a mixing valve device for realizing its stabilization by suppressing a pressure fluctuation of hot water flowing out of an exit.SOLUTION: The mixing valve device has a mixing chamber 10 for mixing water flowing in from a water inflow port 11 and vapor flowing in from a vapor inflow port 12 and discharging them to an exit 13. In one wall 14 on the water inflow port 11 side of the mixing chamber 10, a flowing water port 17 is formed through which water flows into the mixing chamber 10. In the other wall 15 on the vapor inflow port 12 side forming the mixing chamber 10, a valve port 20 is formed which is opened / closed by a valve element 22 to enable vapor to flow into the mixing chamber 10 when the valve element 22 is opened. In the mixing chamber 10, a disc 60 is provided which can freely float while being opposed to the valve port 20. The disc 60 having an insertion hole 61 inserted through a valve rod 25 of the valve element 20 is movable along the valve rod 25.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a mixing valve device that mixes water and steam to generate hot water.

Background Art

[0002] Conventionally, as this type of mixing valve device, for example, the type described in Japanese Patent Laid-Open No. 63-225772 (Patent Document 1) is known and has become mainstream. FIG. 11 shows a conventional type of mixing valve device Sa fabricated by the inventor of the present application corresponding to the technology described in Patent Document 1. This conventional type of mixing valve device Sa includes a main body 1 having a mixing chamber 10 that mixes water flowing in from a water inlet 11 and steam flowing in from a steam inlet 12 and discharges the mixture to an outlet (in the front-rear direction of the drawing). In the main body 1, a water inlet chamber 16 is provided on one side of a wall 14 on the water inlet 11 side that forms the mixing chamber 10. A water flow port 17 for allowing water to flow from the water inlet chamber 16 into the mixing chamber 10 is formed in this wall 14. Further, in the main body 1, a steam inlet chamber 18 is provided on the other side of a wall 15 on the steam inlet 12 side that forms the mixing chamber 10. A valve port 20 through which steam can flow into the mixing chamber 10 is formed in this wall 15. A valve body 22 for opening and closing the valve port 20 is provided in the steam inlet chamber 18, and a coil spring 23 for biasing the valve body 22 in the closing direction is provided. Further, a valve rod 25 is provided on the wall 14 so as to be inserted into a through hole 24 provided therein in a reciprocating manner, with one end supporting the valve body 22 and the other end facing into the water inlet chamber 16. In the water inlet chamber 16, a reciprocating mechanism 30 is provided that is linked to the other end of the valve rod 25 and moves the valve body 22 via the valve rod 25 against the biasing force of the coil spring 23 by the water flowing into the water inlet chamber 16 to open the valve port 20, and moves the valve body 22 and the valve rod 25 by the biasing force of the coil spring 23 to close the valve port 20.

[0003] The advancing and retracting mechanism 30 includes a piston 31 to which the other end of the valve rod 25 is attached, and a cylinder portion 32 that forms part or all of the water inlet chamber 16 and in which the piston 31 can slide forward and backward. The water inlet chamber 16 is composed of an upper chamber 34 on the side of the one wall 14 with the water inlet 17 and a lower chamber 35 partitioned by the piston 31. An upper inlet 36 through which water flows is formed in the upper chamber 34, and a lower inlet 37 through which water flows is formed in the lower chamber 35. The valve rod 25 is advanced and retracted via the piston 31 due to the pressure difference between the water flowing into the upper chamber 34 and the water flowing into the lower chamber 35, and the valve body 22 opens and closes the valve port 20. In the mixing valve device described in Japanese Patent Laid-Open No. 63-225772 (Patent Document 1), the advancing and retracting mechanism is composed of a diaphragm instead of a piston.

[0004] Also, a stroke adjustment mechanism 40 for adjusting the stroke of the valve body 22 is provided above the main body 1. This stroke adjustment mechanism 40 is provided so as to penetrate coaxially with the valve rod 25 in the wall portion constituting the steam inlet chamber 18 and is provided so as to be movable forward and backward by screw means, and has a lower end surface with which the upper end surface of the valve body 22 can abut. An adjustment rod 41, and a handle 42 provided outside the wall portion constituting the steam inlet chamber 18 and linked to the upper end side of the adjustment rod 41 to move the adjustment rod 41 forward and backward by rotating the adjustment rod 41. Further, on the water inlet 11 side of the main body 1, a water volume adjustment mechanism 50 for adjusting the flow rate of the water flowing from the upper inlet 36 into the upper chamber 34 with a needle valve 52 is provided.

[0005] In this mixing valve device Sa, a plurality of water inlets 17 are provided at equal intervals on the circumference centered on the axis of the through hole 24 in the vicinity of the through hole 24 in one wall 14. The valve port 20 is formed in a valve seat body 100 attached to the other wall 15 via screw means. The valve seat body 100 is formed in a cylindrical shape coaxial with the valve rod 25. A valve port 20 for opening and closing the valve body 22 is formed at one end side, and a plurality of outlets 101 through which steam flows out from the valve port 20 are provided on the outer circumference of the other end side. Further, the other end side of the valve seat body 100 is inserted and supported in a cylindrical protruding portion 102 coaxial with the through hole 24 protruding from the inside of the water inlet 17 of the one wall 14 so as not to block the outlet 101. Further, the part of the other end side of the valve seat body 100 where the outlet 101 is located is surrounded at a distance by a cylindrical outer wall 103 coaxial with the through hole 24.

[0006] And in this mixing valve device Sa, when generating warm water by mixing water and steam, the handle 42 of the stroke adjustment mechanism 40 is operated to move the adjustment rod 41 forward and backward to adjust the stroke of the valve body 22 to a required stroke, and the needle valve 52 of the water volume adjustment mechanism 50 is operated to adjust the water volume flowing into the upper chamber 34 of the water inlet chamber 16 to a required water volume. In this state, water is flowed from the water inlet 11 and steam is flowed from the steam inlet 12. The water from the water inlet 11 flows into the upper chamber 34 and the lower chamber 35 of the water inlet chamber 16. The water flowing into the upper chamber 34 flows into the mixing chamber 10 from the water inlet 17, and due to the pressure difference between the water flowing into the upper chamber 35 and the water flowing into the lower chamber 35, a force in the advancing direction of the valve rod 25 acts on the piston 31, and the valve body 22 is moved through this valve rod 25 against the biasing force of the coil spring 23, and the valve port 20 is opened. Thereby, steam flows in from the valve port 20 of the valve seat body 100, flows out from the outlet 101 and flows into the mixing chamber 10, mixes with the water flowing in from the water inlet 17 to become warm water, and is discharged from an outlet (not shown).

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] By the way, in this conventional type of mixing valve device Sa, there has been a problem that the pressure fluctuation of the hot water flowing out from the outlet often becomes large and may become unstable. The reason is that when steam flows in from the valve port 20 of the valve seat body 100 and enters the mixing chamber 10 from the outlet 101, the steam is concentrated at the outlet 101, so the flow trend of the steam becomes strong and directly collides with the water from the water outlet 17. As a result, an action of pushing the water back to the water outlet 17 side occurs. Therefore, it is considered that the phenomenon that the inflow of water is blocked and the water cannot flow sufficiently into the mixing chamber 10 is caused.

[0009] The present invention has been made in view of the above problems, and an object thereof is to provide a mixing valve device that suppresses the pressure fluctuation of the hot water flowing out from the outlet and achieves stabilization.

Means for Solving the Problems

[0010] In order to achieve such an object, the mixing valve device of the present invention has a mixing chamber that mixes water flowing in from a water inlet and steam flowing in from a steam inlet and discharges it to an outlet. A water outlet for allowing water to flow into the mixing chamber is formed on one wall on the water inlet side of the mixing chamber, and on the other wall on the steam inlet side forming the mixing chamber, a valve port that is opened and closed by a valve body and allows steam to flow into the mixing chamber when the valve body is opened is formed. In the mixing valve device, in the mixing chamber, while facing the valve port Movement a disk that is possible is provided.

[0011] Thus, when mixing water and steam to generate warm water, water is flowed from the water inlet and steam is flowed from the steam inlet. The water from the water inlet flows into the mixing chamber from the water outlet, and the steam flows into the mixing chamber from the valve port of the valve seat body, mixes with the water flowing in from the water outlet, becomes warm water, and is discharged from the outlet. In this case, since a disk facing the valve port is provided in the mixing chamber, the steam flowing in from the valve port collides with this disk. Therefore, the flow rate of the steam can be weakened all at once, and the steam is evenly dispersed around the disk without being concentrated as in the prior art, and then the steam is mixed with the water. Thus, the steam does not directly collide with the water flowing in from the water outlet immediately, and the pressure fluctuation of the warm water can be suppressed accordingly, achieving stabilization. Moreover, since the disk traverses the mixing chamber Movement this disk functions as a cushion, and also in this regard, the flow rate of the steam can be weakened, so the pressure fluctuation of the warm water can be suppressed and stabilization can be achieved in this respect.

[0012] Then, if necessary, a valve rod is provided which is inserted through the through hole provided in the one wall, has one end supporting the valve body and the other end linked to the advancing and retracting mechanism and is advanced and retracted by the advancing and retracting mechanism to open and close the valve body. The water outlet is formed near the through hole in the one wall, the disk is formed in a disk shape with a size facing the water outlet, and an insertion hole through which the valve rod is inserted is formed at the center of the disk. The disk is configured to be movable along the valve rod by inserting its insertion hole through the valve rod. Thereby, since the disk also faces the water outlet, it can surely prevent the steam from directly colliding with the water outlet, and further suppress the pressure fluctuation. Also, since the disk is supported by inserting the insertion hole through the valve rod, Movement when moving, it can be guided by the valve rod, so the movement of the disk can be stabilized.

[0013] Further, if necessary, four or more water inlets are provided at equal intervals on the circumference centered on the axis of the through hole. Since four or more water inlets are provided at equal intervals, the inflow of water is dispersed, and pressure fluctuations can be further suppressed. Eight or more are desirable.

[0014] Furthermore, if necessary, a stopper is provided on the one wall side of the disk, the lower surface of which abuts against the one wall side and forms a gap through which water can pass between the outer circumference of the disk and the one wall side. Even if the disk is pushed by steam and the stopper abuts against the one wall side, there is a gap around the outer circumference of the disk, so water can pass through, and mixing with steam can be surely performed.

[0015] More specifically, a protruding portion in which the through hole of the valve rod is formed is provided on the mixing chamber side of the one wall, the water inlet is formed around the protruding portion, and a cylindrical standing wall coaxial with the through hole is provided around the water inlet on the mixing chamber side of the one wall. A cylindrical stopper is provided on the one wall side of the disk, the insertion hole of which is formed and the lower surface of which abuts against the upper surface of the protruding portion to stop the downward movement of the disk. The One wall side lower end surface of the disk has a lower end surface that forms a gap through which water can flow out facing the upper end surface of the standing wall when the stopper abuts against the protruding portion, and a cylindrical hanging wall coaxial with the insertion hole is provided. Even if the disk is pushed by steam and the stopper abuts against the protruding portion, there is a gap around the outer circumference of the disk, so water can pass through, and mixing with steam can be surely performed. Also, since the water from the water inlet is evenly dispersed from the upper end surface of the standing wall toward the periphery, mixing with steam can be surely performed in this respect as well.

[0016] Furthermore, if necessary, a cylindrical outer wall coaxial with the through hole and higher than the standing wall is provided around the standing wall on the mixing chamber side of the one wall. Thereby, the water passing through the gap around the outer circumference of the disk mixes with the steam while hitting the outer wall, so that mixing with the steam can be made more reliable.

[0017] Furthermore, more specifically, as needed, it includes a main body having a mixing chamber that mixes water flowing in from a water inlet and steam flowing in from a steam inlet and discharges the mixture to an outlet. In the main body, a water inlet chamber is formed separated from one wall on the water inlet side of the mixing chamber. A water flow port for allowing water to flow from the water inlet chamber into the mixing chamber is formed in the one wall. In the main body, a steam inlet chamber is formed separated from the other wall on the steam inlet side of the mixing chamber. A valve port through which steam can flow into the mixing chamber is formed in the other wall. A valve body for opening and closing the valve port is provided in the steam inlet chamber, and a coil spring for biasing the valve body in the closing direction is provided. A valve rod is provided that is inserted through a through hole provided in the one wall so as to be able to move forward and backward, with one end supporting the valve body and the other end facing into the water inlet chamber. An advancing and retracting mechanism is provided that is linked to the other end of the valve rod and moves the valve body through the valve rod against the biasing force of the coil spring by the water flowing into the water inlet chamber to open the valve port, and moves the valve body and the valve rod by the biasing force of the coil spring to close the valve port.

[0018] Also, as needed, the advancing and retracting mechanism is configured to include a piston to which the other end of the valve rod is attached, and a cylinder portion that forms part or all of the water inlet chamber and in which the piston can slide forward and backward. The water inlet chamber is composed of an upper chamber on the one wall side with the water flow port and a lower chamber partitioned by the piston. An upper inlet through which water flows into the upper chamber is formed, and a lower inlet through which water flows into the lower chamber is formed. The valve port is opened and closed by the valve body by advancing and retracting the valve rod through the piston due to the pressure difference between the water flowing into the upper chamber and the water flowing into the lower chamber. The movement of the valve rod and the valve body can be made smoother by the piston and the cylinder.

[0019] Furthermore, as needed, a water flow rate adjustment mechanism for adjusting the flow rate of the water flowing from the upper inlet into the upper chamber is provided on the water inlet side of the main body. The adjustment of the warm water volume can be carried out.

[0020] Furthermore, if necessary, a stroke adjustment mechanism for adjusting the stroke of the valve body is provided. The stroke adjustment mechanism is provided coaxially with the valve rod through a wall portion constituting the steam inlet chamber and is provided so as to be movable forward and backward by screw means. It has a lower end surface against which the upper end surface of the valve body can abut, and a handle provided outside the wall portion constituting the steam inlet chamber and linked to the upper end side of the adjustment rod to rotate the adjustment rod to move the adjustment rod forward and backward. It is configured to include. It is possible to adjust the temperature of the warm water.

Advantages of the Invention

[0021] As described above, according to the mixing valve device of the present invention, since a disk facing the valve port is provided in the mixing chamber, the steam flowing in from the valve port collides with this disk. Therefore, the flow rate of the steam can be weakened at once, and the steam is evenly dispersed around the disk without being concentrated as in the prior art, and the steam is then mixed with water. Therefore, it is mixed so as not to directly collide with the water flowing in from the water outlet, so that the pressure fluctuation of the warm water can be suppressed and stabilized. Moreover, since the disk rotates in the mixing chamber Movement Therefore, this disk acts as a cushion, and also in this respect, the flow rate of the steam can be weakened, so that the pressure fluctuation of the warm water can be suppressed and stabilized.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0023] Hereinafter, based on the attached drawings, the mixing valve device according to the embodiment of the invention will be described in detail. The same components as those described above will be denoted by the same reference numerals for description. As shown in Figs. 1 to 7, the mixing valve device S according to the embodiment of the invention mixes water and steam to generate hot water, and includes a metal main body 1 having a mixing chamber 10 that mixes the water flowing in from the water inlet 11 and the steam flowing in from the steam inlet 12 and discharges the mixture to the outlet 13.

[0024] As shown in FIG. 1 or FIG. 2, the main body 1 includes a lower body 2, an inner body 3 assembled to the lower body 2, an upper body 5 fixed to the lower body 2 with bolts 4 via a packing 4a along a vertical axis P, and a cover 7 fixed to the upper body 5 with bolts 6 via a packing 6a. In the lower body 2, a water inlet 11 and a steam inlet 12 are formed on one axis Q orthogonal to the axis P. In the upper body 5, two outlets 13 are formed on the other axis R above one axis Q of the water inlet 11 and the steam inlet 12 and orthogonal to the axis P. The one axis Q and the other axis R are orthogonal to each other when viewed from above. Both of the two outlets 13 may be made effective, or either one of them can be blocked with a plug 8 (FIGS. 4, 5(b) and 7) to make only one effective. In the embodiment, only one is made effective. The mixing chamber 10 is formed surrounded by one wall 14 formed by the inner body 3 and the other wall 15 formed by the inner surface of the upper body 5.

[0025] A water inlet chamber 16 is provided in the main body 1, separated from one wall 14 on the water inlet 11 side forming the mixing chamber 10. A water flow port 17 for allowing water to flow from the water inlet chamber 16 into the mixing chamber 10 is formed in this one wall 14. The water flow ports 17 are provided at equal intervals on the circumference with the axis P as the axis, and there are four or more (eight in the embodiment). Further, a steam inlet chamber 18 is provided in the main body 1, separated from the other wall 15 on the steam inlet 12 side forming the mixing chamber 10. A valve port 20 with the axis P as the axis, through which steam can flow into the mixing chamber 10, is formed in this other wall 15. The valve port 20 is formed in a valve seat body 21 attached to the other wall 15 via screw means. The valve seat body 21 is formed in a cylindrical shape with the axis P as the axis, with a valve port 20 formed on one end side and the other end side being formed to expand downward.

[0026] The steam inlet chamber 18 is provided with a valve body 22 having a base axis P for opening and closing the valve port 20 as its axis, and a coil spring 23 having the base axis P for biasing the valve body 22 in the closing direction as its axis. Further, on one wall 14, a valve rod 25 is provided which is inserted into a through hole 24 provided therein so as to be movable forward and backward, with one end supporting the valve body 22 and the other end facing into the water inlet chamber 16, having the base axis P as its axis. In the water inlet chamber 16, there is provided a forward and backward movement mechanism 30 which is linked to the other end of the valve rod 25 and which, by the water flowing into the water inlet chamber 16, moves the valve body 22 via the valve rod 25 against the biasing force of the coil spring 23 to open the valve port 20, and which, by the biasing force of the coil spring 23, moves the valve body 22 and the valve rod 25 to close the valve port 20.

[0027] The forward and backward movement mechanism 30 includes a piston 31 having the base axis P, to which the other end of the valve rod 25 is attached, as its axis, and a cylinder portion 32 composed of an inner body 3 which forms a part or all (in the embodiment, a part of the upper side) of the water inlet chamber 16 and in which the piston 31 is slidable forward and backward with the base axis P as its axis. Reference numeral 33 is an O-ring provided on the outer periphery of the piston 31. The water inlet chamber 16 is composed of an upper chamber 34 on the side of the one wall 14 having the water inlet 17 and a lower chamber 35 partitioned by the piston 31. An upper inlet 36 through which water flows is formed in the upper chamber 34, and a lower inlet 37 through which water flows is formed in the lower chamber 35. The pressure difference between the water flowing into the upper chamber 34 and the water flowing into the lower chamber 35 causes the valve rod 25 to move forward and backward via the piston 31, and the valve body 22 opens and closes the valve port 20.

[0028] In addition, a stroke adjustment mechanism 40 for adjusting the stroke of the valve body 22 is provided on the upper part of the main body 1. This stroke adjustment mechanism 40 is provided so as to penetrate coaxially (with the axis P as the axis) through the cover 7 which is a wall portion constituting the steam inlet chamber 18 and is provided so as to be movable forward and backward by screw means, and has a lower end surface 41a with which the upper end surface 22a of the valve body 22 can abut. The stroke adjustment mechanism 40 includes an adjustment rod 41 and a handle 42. The adjustment rod 41 is provided on the outside of the wall portion constituting the steam inlet chamber 18 and is linked to the upper end side of the adjustment rod 41, and the adjustment rod 41 is moved forward and backward by rotating the adjustment rod 41. Reference numeral 43 is a packing for sealing between the cover 7 and the adjustment rod 41, and 44 is a pressing nut for the packing 43 which is screwed into the female screw portion of the cover 7 via a pressing ring 45.

[0029] On the water inlet 11 side of the main body 1, a water volume adjustment mechanism 50 for adjusting the flow rate of water flowing from the upper inlet 36 into the upper chamber 34 is provided. The water volume adjustment mechanism 50 includes a holding body 51 fixed to the upper body 5 by screw means, a well-known needle valve 52 screwed into the holding body 51 so as to be movable forward and backward via screw means, and a lock nut 53 provided on the upper end portion side of the needle valve 52 via screw means for locking the needle valve 52 at a required screwing position. Reference numeral 54 is an O-ring for sealing fitted to the needle valve 52.

[0030] In this mixing valve device S, a disk 60 is provided in the mixing chamber 10 while facing the valve port 20. Movement Specifically, as described above, the water outlet 17 is provided in the vicinity of the through hole 24 in one wall 14 and is provided at equal intervals on the circumference (with the axis P as the axis) centered on the axis of the through hole 24, and there are four or more (eight in the embodiment). The disk 60 is formed in a disk shape having a size facing the water outlet 17. An insertion hole 61 to be inserted into the valve rod 25 is formed at the center of the disk 60, and the disk 60 is provided so that the insertion hole 61 is inserted into the valve rod 25 and can move along the valve rod 25.

[0031] Also, on the side of one wall 14 of the disk 60, a stopper 62 is provided. The lower surface of the stopper 62 abuts against the side of one wall 14, and a gap e is formed between the outer periphery of the disk 60 and the side of one wall 14 through which water can pass. Specifically, on the side of the mixing chamber 10 of one wall 14, a protrusion 63 is provided where the through-hole 24 of the valve rod 25 is formed, and the water inlet 17 is formed around the protrusion 63. Also, on the side of the mixing chamber 10 of one wall 14 and around the water inlet 17, a cylindrical standing wall 64 coaxial with the through-hole 24 (with the base axis P as the axis) is provided. And on the side of one wall 14 of the disk 60, a cylindrical stopper 62 with an insertion hole 61 formed therein and a lower surface 62a that abuts against the upper surface 63a of the protrusion 63 to stop the downward movement of the disk 60 is provided. Furthermore, on the One wall 14 side outer periphery of the disk 60, when the stopper 62 abuts against the protrusion 63, a cylindrical hanging wall 65 coaxial with the insertion hole 61 (with the base axis P as the axis) is provided, which has a lower end surface 65a that faces the upper end surface 64a of the standing wall 64 to form a gap e through which water can flow out. Additionally, on the side of the mixing chamber 10 of one wall 14 and around the standing wall 64, an outer wall 66 that is higher than the standing wall 64 and coaxial with the through-hole 24 (with the base axis P as the axis) in a cylindrical shape is provided.

[0032] Therefore, when generating hot water by mixing water and steam with the mixing valve device S according to this embodiment, the handle 42 of the stroke adjustment mechanism 40 is operated to move the adjustment rod 41 forward and backward, so as to adjust the stroke of the valve body 22 to a required stroke, and the needle valve 52 of the water volume adjustment mechanism 50 is operated to adjust the water volume flowing into the upper chamber 34 of the water inlet chamber 16 to a required water volume. In this state, water is flowed from the water inlet 11 and steam is flowed from the steam inlet 12. The water from the water inlet 11 flows into the upper chamber 34 and the lower chamber 35 of the water inlet chamber 16. The water flowing into the upper chamber 34 flows into the mixing chamber 10 from the water outlet 17. Due to the pressure difference between the water flowing into the upper chamber 34 and the water flowing into the lower chamber 35, a force in the advancing direction of the valve rod 25 acts on the piston 31, and the valve body 22 is moved through this valve rod 25 against the biasing force of the coil spring 23, and the valve port 20 is opened. As a result, steam flows into the mixing chamber 10 from the valve port 20 of the valve seat body 21, mixes with the water flowing in from the water outlet 17 to become hot water, and is discharged from the outlet 13.

[0033] In this case, as shown in FIG. 7, since a disk 60 facing the valve port 20 is provided in the mixing chamber 10, the steam flowing in from the valve port 20 collides with this disk 60. Therefore, the flow rate of the steam can be weakened all at once. Also, the steam is evenly dispersed around the disk 60 without being concentrated as in the prior art, and the steam is then mixed with the water. Thus, the steam does not directly collide with the water flowing in from the water outlet 17 and is mixed, so that the pressure fluctuation of the hot water can be suppressed accordingly, and stabilization can be achieved. Moreover, since the disk 60 rotates within the mixing chamber 10 Movement the disk 60 acts as a cushion, and from this aspect as well, the flow rate of the steam can be weakened, so that the pressure fluctuation of the hot water can be suppressed and stabilization can be achieved.

[0034] In addition, since the disk 60 is formed in a disk shape with a size facing the water outlet 17, it is possible to reliably prevent the steam from directly colliding with the water outlet 17, and further suppress pressure fluctuations. Also, since the insertion hole 61 of the disk 60 is inserted through and supported by the valve rod 25, Movement when moving, the disk 60 is guided by the valve rod 25, so the movement of the disk 60 can be stabilized. Furthermore, since four or more (eight in the embodiment) water outlets 17 are provided at equal intervals on the circumference centered on the axis of the through hole 24, the inflow of water into the mixing chamber 10 is dispersed, and pressure fluctuations can be further suppressed.

[0035] Furthermore, as shown in FIG. 7, the disk 60 may be pushed by the steam and the stopper 62 may abut against the protrusion 63. In this case, since there is a gap e on the outer periphery of the disk 60 and water can pass through, the mixing with the steam can be surely performed. Also, the water from the water outlet 17 is evenly dispersed from the upper end surface 64a of the standing wall 64 toward the periphery, so the mixing with the steam can also be surely performed in this respect.

[0036] Moreover, since there is an outer wall 66 higher than the standing wall 64 around the standing wall 64, the water passing through the gap e on the outer periphery of the disk 60 collides with the outer wall 66 and mixes with the steam, so that the mixing with the steam can be made more reliable.

[0037] <Test Example> The mixing valve device S provided with the disk 60 according to the above-described embodiment was taken as an example, and a conventional type mixing valve device Sa without the disk 60 shown in FIG. 11 was taken as a comparative example. A test device T shown in FIG. 8 was fabricated, and the following tests were conducted for each of the mixing valve devices S and Sa. The test device T was configured by connecting a water pipe 75, which was connected in sequence with a pressure reducing valve 71, a flow meter 72, a check valve 73, and a pressure gauge 74 from a water header 70 that stores and supplies water, to the water inlet 11 of the mixing valve devices S and Sa, connecting a steam pipe 84, which was connected in sequence with a pressure reducing valve 81, a check valve 82, and a pressure gauge 83 from a steam header 80 that stores and supplies steam generated by a boiler (not shown), to the steam inlet 12 of the mixing valve devices S and Sa, and connecting a hot water pipe 87, which was equipped with a pressure gauge 85 and a stop valve 86, to the outlet 13 of the mixing valve devices S and Sa. A thermometer 90 was attached to the outlet 13 of the mixing valve devices S and Sa.

[0038] For the test, the water supply pressure (the pressure of the pressure gauge 74), the steam pressure (the pressure of the pressure gauge 83), and the target hot water outlet pressure were preset to the following six types of setting conditions. The handle 42 was manually operated from the fully closed state (FIG. 5) to the fully open state (FIGS. 3 and 4) of the valve body 22, gradually raising the hot water temperature at the outlet 13 of the hot water, and measuring the change in the actual hot water outlet pressure (the pressure gauge 85) at each temperature (the thermometer 90).

[0039] Setting conditions (1) Water supply pressure 0.3 MPa, steam pressure 0.3 MPa, target hot water outlet pressure 0.2 MPa (2) Water supply pressure 0.3 MPa, steam pressure 0.4 MPa, target hot water outlet pressure 0.2 MPa (3) Water supply pressure 0.4 MPa, steam pressure 0.4 MPa, target hot water outlet pressure 0.3 MPa (4) Water supply pressure 0.4 MPa, steam pressure 0.5 MPa, target hot water outlet pressure 0.3 MPa (5) Water supply pressure 0.5 MPa, steam pressure 0.5 MPa, target hot water outlet pressure 0.3 MPa (6) Water supply pressure 0.5 MPa, steam pressure 0.5 MPa, target hot water outlet pressure 0.4 MPa

[0040] The results are shown in FIGS. 9 and 10. In FIGS. 9 and 10, the reference numerals (1) to (6) attached to the examples and comparative examples correspond to (1) to (6) of the above-described setting conditions. From these results, it can be seen that in the example with the disk 60, the change in the hot water outlet pressure is extremely small and stable compared to the conventional type of comparative example without the disk 60.

[0041] In the above-described embodiment, the disk 60 is formed in a disk shape, but it is not necessarily limited to this. Under the condition of facing the valve port 20, it may be formed in any shape and can be appropriately changed without any problem. Also, in the above-described embodiment, the reciprocating mechanism 30 is configured as a piston and cylinder type, but it is not necessarily limited to this. Instead of the piston 31, a diaphragm type may be used and can be appropriately changed without any problem. Those skilled in the art can easily make many changes to these exemplary embodiments without substantially departing from the novel teachings and effects of the present invention, and many of these changes are included in the scope of the present invention.

Explanation of Reference Numerals

[0042] S Mixing Valve Device 1 Main Body 2 Lower Body 3 Inner Body 4 Bolt 4a Packing 5 Upper Body 6 Bolt 6a Packing 7 Cover 8 Plug P Axis Q One Axis R The Other Axis 10 Mixing Chamber 11 Water Flow Inlet 12 Steam Flow Inlet 13 Outlet 14 One Wall 15 The Other Wall 16 Water Inflow Chamber 17 Water Outlet 18 Steam Inflow Chamber 20 Valve Port 21 Valve Seat Body 22 valve body 22a upper end face 23 coil spring 24 through hole 25 valve rod 30 reciprocating mechanism 31 piston 32 cylinder part 33 O-ring 34 upper chamber 35 lower chamber 36 upper inlet 37 lower inlet 40 stroke adjustment mechanism 41 adjustment rod 41a lower end face 42 handle 43 packing 44 retaining nut 45 retaining ring 50 water volume adjustment mechanism 51 holder 52 needle valve 53 lock nut 54 O-ring 60 disk 61 insertion hole 62 stopper 62a lower face e gap 63 protrusion 63a upper face 64 standing wall 64a upper end face 65 hanging wall 65a lower end face 66 outer wall T test device Sa conventional type mixing valve device 70 water header 71 pressure reducing valve 72 flow meter 73 check valve 74 pressure gauge 75 water pipe 80 steam header 81 pressure reducing valve 82 check valve 83 pressure gauge 84 steam pipe 85 Pressure gauge 86 Stop valve 87 Hot water pipe 90 Thermometer

Claims

1. A mixing valve device having a mixing chamber that mixes water flowing in from a water inlet and steam flowing in from a steam inlet and discharges the mixture to an outlet, with a water outlet for allowing water to flow into the mixing chamber formed in one wall on the water inlet side of the mixing chamber, and a valve port formed in the other wall on the steam inlet side forming the mixing chamber that is opened and closed by a valve body and allows steam to flow into the mixing chamber when the valve body is open. In this mixing valve device, a disk that is movable while facing the valve port is provided in the mixing chamber, a valve rod is provided that is inserted through a through-hole provided in the one wall, with one end supporting the valve body and the other end linked to an advancing and retreating mechanism and being advanced and retreated by the advancing and retreating mechanism to open and close the valve body. The water outlet is formed in the vicinity of the through-hole in the one wall. The disk is formed in a disk shape with a size facing the water outlet, and an insertion hole through which the valve rod is inserted is formed at the center of the disk. The disk is inserted through the insertion hole into the valve rod and is made movable along the valve rod. This is the characteristic of the mixing valve device.

2. The mixing valve device according to Claim 1, characterized in that four or more water outlets are provided at equal intervals on the circumference centered on the axis of the through-hole.

3. The mixing valve device according to Claim 1 or 2, characterized in that a stopper is provided on the one wall side of the disk, with the lower surface abutting against the one wall side and a gap through which water can pass being formed between the outer circumference of the disk and the one wall side.

4. On the mixing chamber side of the one wall, a protruding portion in which the through-hole of the valve rod is formed is provided. The water outlet is formed around the protruding portion. On the mixing chamber side of the one wall and around the water outlet, a cylindrical standing wall coaxial with the through-hole is provided. On the one wall side of the disk, a cylindrical stopper is provided in which the insertion hole is formed and the lower surface abuts against the upper surface of the protruding portion to stop the downward movement of the disk. The outer circumference of the disk on the one wall side has a lower end surface that forms a gap through which water can flow out facing the upper end surface of the standing wall when the stopper abuts against the protruding portion, and a cylindrical hanging wall coaxial with the insertion hole is provided. This is the characteristic of the mixing valve device according to Claim 1 or 2.

5. The mixing valve device according to Claim 4, characterized in that a cylindrical outer wall coaxial with the through-hole and higher in height than the standing wall is provided around the standing wall on the mixing chamber side of the one wall.

6. A main body having a mixing chamber for mixing water flowing in from a water inlet and steam flowing in from a steam inlet and discharging the mixture to an outlet is provided. In the main body, a water inlet chamber is formed on one side wall of the water inlet side of the mixing chamber, and a water flow port for allowing water to flow from the water inlet chamber into the mixing chamber is formed in the one side wall. In the main body, a steam inlet chamber is formed on the other side wall of the steam inlet side of the mixing chamber, and a valve port through which steam can flow into the mixing chamber is formed in the other side wall. A valve body for opening and closing the valve port is provided in the steam inlet chamber, and a coil spring for biasing the valve body in the closing direction is provided. A valve rod is provided so as to be inserted into a through hole provided in the one side wall so as to be able to move forward and backward, with one end supporting the valve body and the other end facing into the water inlet chamber. An advancing and retreating mechanism is provided which is linked to the other end of the valve rod and moves the valve body through the valve rod against the biasing force of the coil spring by the water flowing into the water inlet chamber to open the valve port, and moves the valve body and the valve rod by the biasing force of the coil spring to close the valve port. The mixing valve device according to any one of claims 1 to 5, characterized in that.

7. The advancing and retreating mechanism is configured to include a piston to which the other end of the valve rod is attached, and a cylinder portion that constitutes part or all of the water inlet chamber and in which the piston can slide forward and backward. The water inlet chamber is composed of an upper chamber on the one side wall side where the water flow port is located and a lower chamber partitioned by the piston. An upper inlet through which water flows into the upper chamber is formed, and a lower inlet through which water flows into the lower chamber is formed. The valve body opens and closes the valve port by advancing and retreating the valve rod through the piston due to the pressure difference between the water flowing into the upper chamber and the water flowing into the lower chamber. The mixing valve device according to claim 6, characterized in that.

8. The mixing valve device according to claim 7, characterized in that a water flow rate adjusting mechanism for adjusting the flow rate of water flowing from the upper inlet into the upper chamber is provided on the water inlet side of the main body.

9. A stroke adjustment mechanism for adjusting the stroke of the valve body is provided. The stroke adjustment mechanism is provided coaxially with the valve rod through a wall portion constituting the steam inlet chamber and is provided so as to be movable forward and backward by screw means and has a lower end surface against which the upper end surface of the valve body can abut. An adjustment rod, and a handle provided outside the wall portion constituting the steam inlet chamber and linked to the upper end side of the adjustment rod to rotate the adjustment rod to move the adjustment rod forward and backward. The mixing valve device according to any one of claims 6 to 8, characterized in that it is configured to include.

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