JP5184002B2 - Duplex type mixing valve and hot water supply system - Google Patents

Description

  The present invention relates to a double-mixed mixing valve having a plurality of independent mixing valves capable of obtaining hot water of a desired temperature by mixing water and hot water, and in particular, there are a plurality of hot water supply destinations (uses). In addition, the present invention relates to a double-mixing mixing valve and a hot water supply system suitable for use in a hot water supply system and the like that are required to individually adjust the temperature of hot water for each supply destination.

  Conventionally, as a mixing valve used in a hot water supply system or the like, as seen in, for example, the following Patent Document 1 and the like, a valve body and a substantially cylindrical valve body that is rotatably fitted in the valve body And a drive means for rotating the valve body, the valve body is provided with a water inlet (joint) and a hot water inlet (joint), and the water inlet and the hot water are provided in a peripheral wall portion of the valve body. One or a plurality of adjustment openings are provided to continuously change the opening area of the inlet, and the valve body is rotated to mix the water and hot water, in other words, the hot water to be derived. There is known a mixing valve in which the temperature is adjusted.

A hot water supply system using such a mixing valve, in particular, as illustrated in FIG. 16, there are a plurality of hot water supply destinations (uses) such as a bath (bathroom), hot water supply (kitchen), room heating, and the like. In the hot water supply system 200 ′, where there are places and it is required to individually adjust the temperature of the hot water for each supply destination, a plurality of mixing valves as described above are provided in accordance with the number of supply destinations (uses). (In this case, three) are used. Specifically, in such a conventional hot water supply system 200 ′, for example, the hot water (tap water) is heated to a predetermined temperature by a heating means such as a heat pump unit and stored in the hot water tank 250 (circulated to maintain the predetermined temperature). The hot water in the hot water storage tank 250 is distributed to the hot water inlets of the mixing valves 210, 220, 230 for bath, hot water supply, and heating through the pipes 261, 262, 263, Water (tap water) is distributed to the water inlets of the mixing valves 210, 220, and 230 via the pipes 271, 272, and 273 so that hot water at a required temperature is obtained at the mixing valves 210, 220, and 230. The mixing ratio of the hot water and the hot water is adjusted, and the mixture is supplied from the outlet through the pipes 281, 282, and 283 to the necessary portions.
Japanese Patent Laid-Open No. 2003-222253

  However, in the conventional hot water supply system 200 ′ described above, the number of mixing valves corresponding to the number of hot water supply destinations (uses) is required, and piping (261 for distributing hot water and water to each mixing valve, respectively) , 262, 263, 271, 272, 273) and joints, the number of parts in the piping system is increased, the occupied space is increased, and the layout of component members is greatly restricted. There was a problem of high costs.

  In addition, since the number of mixing valves that are normally used independently is used as many as the number of hot water supply destinations (uses), they are used for mixing water and hot water other than piping systems. The total number of parts in the part also increased, and from this point of view there was a dislike that the cost would be high.

  Furthermore, the mixing valve used in the conventional hot water supply system is adjusted to the cylindrical body of the valve body, while a hot water inlet and a water inlet are provided in the valve body, as can be seen in Patent Document 1. An opening for water is formed, and the mixing ratio of hot water and water is determined by the hot water inlet and the opening area of the water inlet that are opened and closed by the valve body (the adjustment opening). In addition, a valve body presser is inserted into the upper part of the valve body via a sealing material, and a shaft portion protruding from the ceiling of the cylindrical body of the valve body is inserted into the valve body presser. A bearing hole is formed, and a driving means (such as a stepping motor) for rotating the valve body is disposed on the valve body presser, and the valve body is positioned at the position of the valve body and the valve body presser ( The position in the up / down, left / right, and front / rear directions, and the position of the rotation axis) are regulated.

  However, in the conventional mixing valve, the position of the valve body is regulated by the two members of the valve body and the valve body presser as described above. The center axis of the valve and the center axis of the valve body are likely to be misaligned, and as a result, the valve body (the axis of rotation) is misaligned and tilted. As a result, the valve body and the valve body are in uneven contact. As a result, frictional resistance and wear increase, and a large misalignment occurs between the valve body adjustment opening and the hot water inlet and water inlet of the valve body. There is a risk of causing problems such as being lost.

  Further, in order to change the mixing characteristics of water and hot water (temperature characteristics of the obtained hot water) in the conventional mixing valve, it is necessary to change the dimensions of the water inlet and the hot water inlet formed in the valve body. That is, in order to change the mixing characteristic (temperature characteristic) of the mixing valve, it is necessary to modify the valve body. In this case, for example, in order to change two mixing characteristics (temperature characteristics) of the three mixing valves used in the hot water supply system 200 ′, it is necessary to newly manufacture two types of valve bodies. As a result, there is a problem that the mold cost is increased and the manufacturing cost is increased.

  The present invention has been made in view of the above circumstances, and an object thereof is to reduce piping costs and the like in a hot water supply system or the like having a plurality of hot water supply destinations (uses), thereby reducing equipment costs. Compared to the case of using multiple normal mixing valves, the number of parts can be greatly reduced, and the frictional resistance and wear between the valve body and the valve body can be reduced. An object of the present invention is to provide a double-mixing valve that can be adjusted appropriately.

In order to achieve the above object, the multiple-mixing valve according to the present invention has a plurality of hot water supply destinations (uses), and the temperature of the hot water can be individually adjusted for each supply destination. It is suitable for use in the required hot water supply system. Basically, the mixing ratio of water and hot water is arbitrarily and independently changed to a single valve body in which a water inlet and a hot water inlet are formed. mixing valve which can is constituted by a plurality disposed.

The valve body has a water introduction chamber and a hot water introduction chamber separated by a partition, and each of the mixing valves has a water opening opening in the water introduction chamber and a hot water opening in the hot water introduction chamber. A cylindrical wall body having a cylindrical inner peripheral surface in which an opening for water is formed, and is rotatably fitted in the cylindrical wall, and rotates the opening area of the water opening and the hot water opening. In order to change continuously according to an angle, it is provided with the substantially cylindrical valve body in which the opening part for adjustment was formed in the surrounding wall part.

Furthermore, within the valve body, wherein with each valve body is rotatably supported, single ball valve retainer to perform their position restriction is characterized in that it is arranged.

  In a more preferred aspect, the single valve body presser can be attached to and detached from the valve body, and the cylindrical wall body of each mixing valve is integrally provided on the valve body presser.

In a more preferred aspect, a plurality of outlets are formed in the valve body to individually derive the mixed hot water obtained from each of the mixing valves.
The mixing valves are preferably arranged side by side in a straight line.

  In another preferred aspect, a bearing hole into which a shaft portion protruding from an upper portion of each valve body is inserted is formed in the valve body presser, and each valve body is individually provided on the valve body presser. A plurality of driving means for rotating the motor is provided.

  In another preferred embodiment, the mixing characteristics are made different in at least two mixing valves.

  In a more specific preferred embodiment, the size and shape of the water opening and / or the hot water opening are different in at least two mixing valves.

In another preferred embodiment, the water introduction port and the hot water introduction port are configured such that water introduced from the water introduction port into the water introduction chamber and hot water introduced from the hot water introduction port into the hot water introduction chamber are the mixing valves. The formation position is set so as not to directly contact the water opening and the hot water opening. A hot water supply system according to the present invention is characterized in that the double-mixing valve according to any one of the above is used.

  In the multiple mixing valve according to the present invention, the valve body is provided with a water introduction port, a water introduction chamber, a hot water introduction port and a hot water introduction chamber, and a plurality of mixing valves are provided between the water introduction chamber and the hot water introduction chamber. Since the multiple-mixing mixing valve is disposed, the hot water supply destination (use) as shown in FIG. 16 is, for example, bath (bathroom), hot water supply (kitchen), room heating, etc. When applying to a hot water supply system that has three locations and requires that the temperature of the hot water be individually adjusted for each supply destination, a water pipe is connected to the water inlet, and a hot water pipe is connected to the hot water inlet. And hot water supply pipes may be connected to the outlets as in the conventional case. Therefore, conventionally, three hot water pipes and three water pipes are required. However, in the hot water supply system using the double-mixed mixing valve of the present invention, one hot water pipe and one water pipe are provided. Just do it. For this reason, while being able to reduce the number of parts of the piping system in a hot water supply system, it can be put together compactly, the layout freedom degree of a structural member is raised, and equipment cost can be held down low.

  In addition, conventionally, the number of mixing valves that are normally used alone is used as they are in accordance with the number of hot water supply destinations (uses). However, in the double-mixing mixing valve of this embodiment, water and hot water are used. Although three mixing valves that can change the mixing ratio of each independently are provided, the valve body, valve body retainer, mounting plate, etc. are shared by the three mixing valves. Only one is required, so that the total number of parts of the mixing valve portion used for mixing water and hot water can be reduced, and the cost can also be reduced in this respect.

  Further, in the conventional mixing valve, since the position of the valve body is regulated by the two members, that is, the valve main body and the valve body presser as described above, a positional deviation is likely to occur between the central axes of these two members. However, in the multiple mixing valve of the present invention, the position of the valve body is regulated by only one member of the valve body presser integrally provided with the cylindrical wall body. There is almost no displacement between the center axis of the body and the center axis of the valve body retainer (bearing hole), and therefore it is difficult for the valve body (rotation axis) to be displaced or tilted. Friction resistance and wear due to uneven contact between the body and the valve body can be reduced, and there is almost no displacement between the adjustment opening of the valve body, the opening for water and the opening for hot water. The mixing ratio of water can be adjusted appropriately.

Hereinafter, an embodiment of a multiple mixing valve of the present invention will be described with reference to the drawings.
1 and 2 are a front view and a side view showing an embodiment of a double-mixing valve according to the present invention, FIG. 3 is an enlarged sectional view taken along the line XX of FIG. 1, and FIG. It is a YY arrow expanded sectional view of.

  As shown in FIG. 13, for example, the multiple-mixing valve 1 of the embodiment shown in FIG. 13 has a plurality of hot water supply destinations (uses) such as a bath (bathroom), hot water supply (kitchen), room heating, and the like. In addition, it is used in a hot water supply system 200 that is required to individually adjust the temperature of hot water for each supply destination. One water inlet 4A (joint 4), one hot water inlet 5A (joint) 5), and a single valve body 2 in which three outlets 6A (joints 6) are formed, three mixing valves 11 having the same configuration, in which the mixing ratio of water and hot water can be arbitrarily changed independently, 12, 13 (referred to as the first mixing valve 11, the second mixing valve 12, and the third mixing valve 13 as necessary) are provided.

  Specifically, the valve body 2 is made of, for example, a synthetic resin, and as shown in FIG. 5 and FIG. 6 as a single body, one side surface of the elongated container-like body portion 3 provided with a flange portion 3a on the upper portion. In addition, the joint 4 in which the water introduction port 4A is formed projects sideways, and on the other side, the joint 5 in which the hot water introduction port 5A is formed projects sideways, and on the bottom surface, Three joints 6 each having a lead-out port 6 </ b> A are juxtaposed in a side-by-side manner.

  In the main body 3, a water introduction chamber 7 and a hot water introduction chamber 8 separated by a partition wall 9 are formed. The partition wall 9 is a plate-like left end partition wall portion 9A, center left partition wall portion 9B, and center right partition wall portion 9C that are erected at a height from the bottom surface to the lower end of the flange portion 3a on the center line C in the width direction of the main body 3. And a right end partition wall 9D. A cylindrical wall body 17 (a part of the outer peripheral surface) of a mixing valve 11, 12, 13 (described later) is inserted into one or both ends of each of the partition walls 9A, 9B, 9C, 9D by press fitting or the like. Arc-shaped holding portions 9u and 9v that are brought into close contact with each other are provided.

  A first mixing valve 11 is disposed between the left end partition wall portion 9A and the central left partition wall portion 9B of the partition wall 9, and a second mixing valve is disposed between the center left partition wall portion 9B and the center right partition wall portion 9C. The valve 12 is disposed, the third mixing valve 13 is disposed between the central right partition wall portion 9C and the right end partition wall portion 9D, and the outlet 6A is opened directly below the mixing valves 11, 12, and 13. ing. In addition, the water introduction chamber 7 side (one side surface of the valve body 2) separated by the partition wall 9 in the valve body 2 faces the central left partition wall portion 9 </ b> B between the first mixing valve 11 and the second mixing valve 12. Thus, the water inlet 4A is opened, and the hot water introduction chamber 8 side (the other side of the valve body 2) faces the central right partition wall 9C between the second mixing valve 12 and the third mixing valve 13. As described above, the hot water inlet 5A is opened.

  In addition, an annular groove 38 is formed below the lower end surface of the cylindrical wall body 17 (described later) of each of the mixing valves 11, 12, 13 at the bottom of the main body 3 to ensure water tightness. A packing 39 is fitted in the annular groove 38.

  Each of the mixing valves 11, 12, and 13 includes a cylindrical wall body 17 that is provided integrally with a valve body presser 15 that will be described later, a valve body 20, and a stepping motor 50 that serves as a driving means for rotating the valve body 20. And. The cylindrical wall body 17 includes a circular water opening 31 that opens into the water introduction chamber 7 and a hot water opening 41 that opens into the hot water introduction chamber 8 and has the same dimensions as the water opening 31. Are formed with an angular interval of 180 degrees from each other.

  Moreover, the valve body 20 has a cylindrical peripheral wall portion 22 with a ceiling portion 23 as can be understood by referring to FIG. 7 in addition to FIGS. 3 and 4, and the peripheral wall portion 22 is formed in the cylindrical shape. It is slidably inserted into the wall body 17 so as to function as a sealing surface portion for closing the water opening 31 and the hot water opening 41, and the peripheral wall 22 has a water opening. In order to continuously change the opening area of the portion 31 and the hot water opening 41 according to the rotation angle of the valve body 20, a side opening semi-elliptical or triangular opening 30 for adjustment is provided. The adjustment opening 30 is opened about 180 degrees when viewed from the rotation angle of the valve body 20.

  In addition, a shaft portion 25 projects from the center of the top surface of the ceiling portion 23 of the valve body 20. In the lower part of the shaft part 25, a groove formed of a three-stage bowl-shaped part 28 to which O-rings 29 and 29 (FIG. 3) are mounted is provided, and in the upper part thereof, the rotor (the shaft of the stepping motor 50) ) A spline shaft portion 26 and a convex portion 27 having a non-circular cross section (D-cut shape or the like) are provided so as to be connected to 52 so as to be integrally rotatable.

  On the other hand, the valve body retainer 15 is used to rotatably support the valve bodies 20, 20, and 20 of the mixing valves 11, 12, and 13 and to restrict their positions. As can be clearly seen with reference to FIG. 8, the lower surface of the main body 3 is fitted into the flange portion 3a and the lower surface thereof is brought into contact with the upper end surface of the partition wall 9 (9A, 9B, 9C, 9D). The upper surface has a pressing plate portion 16 having a thickness that is flush with the upper end surface of the flange portion 3 a, and the cylindrical wall body 17 of each of the mixing valves 11, 12, 13 is formed on the lower surface of the pressing plate portion 16. Are provided integrally. Further, the holding plate portion 16 is formed with a bearing hole 14 through which the shaft portion 25 of each valve body 20 is inserted, and a ring-shaped elastic seal member 19 (FIG. 3) is mounted on the outer peripheral side surface thereof. A groove 18 is formed.

  The stepping motor 50 is disposed on the valve body holder 15 via a metal mounting plate 35 having a through hole 36 through which the shaft portions 25, 25, 25 of the mixing valves 11, 12, 13 are passed. , 50, 50 are fixedly attached. Specifically, the valve bodies 20, 20, 20 of the mixing valves 11, 12, 13 are inserted into the cylindrical wall bodies 17, 17, 17 provided integrally with the valve body holder 15 from below. Is inserted into the main body 3, and then the mounting plate 35 is pressed by the set screws 56, 56,... Screwed into the screw holes 54, 54,. The valve body 2 is fastened and fixed so that 15 is pressed against the body portion 3. As a result, the lower surface of the pressing plate portion 16 of the valve body pressing member 15 is brought into watertight pressure contact with the upper end surface of the partition wall 9 (9A, 9B, 9C, 9D), and the lower end surface of the cylindrical wall member 17 is connected to the packing. 39 is watertightly pressed. Accordingly, the water introduction chamber 7 and the hot water introduction chamber 8 are almost completely partitioned by the partition wall 9 (9A, 9B, 9C, 9D) and the three mixing valves 11, 12, 13.

  Further, when the mounting plate 35 is fastened and fixed to the valve body 2 with set screws 56, 56,..., The shaft portion 25 of the valve body 20 is a bearing formed on the pressing plate portion 16 of the valve body presser 15. Through the hole 14, the bearing hole 14 is rotatably supported via the O-rings 29, 29, and the upper portion (spline shaft portion 26 and convex portion 27) of the shaft portion 25 is placed on the mounting plate 35. Protruding. In order to connect the rotor (axis) 52 of the stepping motor 50 to the protruding spline shaft portion 26 and the convex portion 27 so as to be integrally rotatable, the positioning of the stepping motor 50 is performed, and set screws 57, 57, It is made to attach and fix by.

  In such an assembled state, the mixing valves 11, 12, 13 are arranged side by side in a straight line (on the center line C in the width direction of the main body 3), and the valves of the mixing valves 11, 12, 13 are arranged. The upper surface of the ceiling portion 23 of the body 20 abuts on the lower surface of the pressing plate portion 16 so as to be rotatable, and the lower end of the valve body 20 is rotatable on the bottom surface of the main body portion 3 (the periphery of the upper edge of the outlet 6A). Abut.

  Next, the operation of each mixing valve 11, 12, 13 in the double-mixing mixing valve 1 of the present embodiment configured as described above will be described as a representative of the first mixing valve 11.

  In the first mixing valve 11, the valve body 20 is at the position shown in FIGS. 3 and 4, that is, the opening area of the water opening 31 is maximum (fully open) and the opening area of the hot water opening 41 is minimum ( 0 = fully closed), the water in the water introduction chamber 7 is introduced into the valve body 20 through the water opening 31 and the adjustment opening 30. Is not introduced, only water is led out from the outlet 6A. When the position of the valve body 20 is set as an initial position and the valve body 20 is rotated in one direction by the stepping motor 50 from the initial position, as shown in FIG. The opening area of the opening 31, that is, the flow rate of water introduced into the valve body 20 decreases, and the opening area of the hot water opening 41, that is, the flow rate of hot water introduced into the valve body 20 increases. As a result, the temperature of the mixed hot water led out from the outlet 6A becomes higher.

  When the rotation angle reaches a predetermined angle Ra (the valve body 20 rotates from the initial position to the position of the valve body 20 of the second mixing valve 12 in FIGS. 3 and 4), the opening of the water opening 31 is opened. The area (flow rate of water) and the opening area of the hot water opening 41 (flow rate of hot water) are the same, and the mixing ratio is 50%: 50%. Furthermore, when the rotation angle reaches a predetermined angle Rb (the valve body 20 rotates to the position of the valve body 20 of the third mixing valve 13 in FIGS. 3 and 4), the opening area of the water opening 31 gradually decreases. 0 (fully closed), and the opening area of the hot water opening 41 gradually increases to the maximum (fully open), so that the hot water in the hot water introducing chamber 8 is valved via the hot water opening 41 and the adjustment opening 30. Although introduced into the body 20, the water in the water introduction chamber 7 is not introduced, so only hot water is led out from the outlet 6A.

  As described above, the first mixing valve 11, the second mixing valve 12, and the third mixing valve 13 of the present embodiment rotate the valve body 20 within the range of the initial position (rotation angle 0) to the predetermined angle Rb, respectively. The mixing ratio of water and hot water can be arbitrarily changed independently, and hot water having a desired temperature can be obtained.

  As described above, in the multiple mixing valve 1 of the present embodiment provided with the three mixing valves 11, 12, 13 that can arbitrarily and independently change the mixing ratio of water and hot water, A water introduction port 4A, a water introduction chamber 7, a hot water introduction port 5A, and a hot water introduction chamber 8 are provided, and three mixing valves 11, 12, 13 are disposed between the water introduction chamber 7 and the hot water introduction chamber 8. Therefore, as shown in FIG. 16 described above, there are three locations where the hot water supply destination (use) is the bath (bathroom), hot water supply (kitchen), room heating, etc. And when applying to the hot water supply system by which it is requested | required that the temperature of warm water should be adjusted separately for every supply destination, as shown in FIG. 13, the piping 4270 for water is supplied to the joint 4 (water inlet 4A). Is connected, and the hot water pipe 260 is connected to the joint 5 (hot water inlet 5A), and the three joints 6 (leading out) are connected. The 6A), may be connected to the hot water supply pipe 281, 282, 283 as in the prior art, respectively. Therefore, conventionally, three hot water pipes and three water pipes (261, 262, 263, 271, 272, 273) are required respectively. However, the hot water supply using the double-mixed mixing valve 1 of this embodiment is used. In the system 100, only one hot water pipe and one water pipe (260, 270) are required. For this reason, while being able to reduce the number of parts of the piping system in a hot water supply system, it can be put together compactly, the layout freedom degree of a structural member is raised, and equipment cost can be held down low.

  In addition, conventionally, the number of mixing valves that are normally used alone is used as they are according to the number of hot water supply destinations (uses), but in the double-mixing mixing valve 1 of the present embodiment, water and There are three mixing valves that can change the mixing ratio of hot water arbitrarily independently, but the valve body, valve body presser, mounting plate, etc. are shared by the three mixing valves. Since only one member is required, the total number of parts of the mixing valve portion used for mixing water and hot water can be reduced, and the cost can be reduced from this point.

  Further, in the conventional mixing valve, since the position of the valve body is regulated by the two members, that is, the valve main body and the valve body presser as described above, a positional deviation is likely to occur between the central axes of these two members. However, in the multiple mixing valve 1 of the present embodiment, the position of the valve body is regulated by only one member of the valve body presser 15 provided integrally with the cylindrical wall body 17. There is almost no displacement between the central axis of the cylindrical wall body 17 and the central axis of the valve body retainer 15 (the bearing hole 14), and therefore there is a displacement or inclination of the valve body (rotational axis O). As a result, frictional resistance and wear due to uneven contact between the valve body and the valve body can be reduced, and between the adjustment opening 30, the water opening 31, and the hot water opening 41 of the valve body 20. There is almost no displacement, so the mixing ratio of hot water and water is appropriate. It can be adjusted.

  Further, as described above, for example, in order to change two mixing characteristics (temperature characteristics) of three mixing valves used in the conventional hot water supply system 200, two types of valve bodies are newly manufactured. Although it was necessary, in the double-mixing mixing valve 1 of the present embodiment, for example, the mixing characteristic (temperature characteristic) of the first mixing valve 11 is not changed, and the mixing of the second mixing valve 12 and the third mixing valve 13 is not changed. In order to change the characteristic (temperature characteristic), as shown in FIG. 9, a circular water opening 31 and / or a hot water opening is formed in the cylindrical wall body 17 of the second mixing valve 12 located at the center. Instead of 41, a water opening 32 and / or a hot water opening 42 having a required shape (for example, a bullet shape) is formed, and a circular wall 17 is formed on the cylindrical wall body 17 of the third mixing valve 13 located at the right end. Instead of the water opening 31 and / or the hot water opening 41, a desired shape (example) 8), a valve body retainer 15 'having a water opening 33 and / or a hot water opening 43 is prepared. The valve body retainer 15' is used as the valve body 2 and the three cylinders shown in FIG. Instead of the valve body presser 15 in which the circular water opening 31 and the hot water opening 41 are respectively formed in the shaped wall bodies 17, 17 and 17, they may be assembled. There is no need to manufacture the valve body. Therefore, the mixing characteristic (temperature characteristic) can be changed easily and easily, and the manufacturing (change) cost can be kept low.

  Further, in the double-mixing mixing valve 1, the water mixing chamber 7 side (one side surface of the valve body 2) partitioned by the partition wall 9 in the valve body 2 is provided between the first mixing valve 11 and the second mixing valve 12. A water inlet 4A is formed so as to face the central left partition wall 9B, and a central right partition wall between the second mixing valve 12 and the third mixing valve 13 on the hot water introduction chamber 8 side (the other side surface of the valve body 2). Since the hot water inlet 5A is formed so as to face the portion 9C, water introduced into the water inlet chamber 7 from the water inlet 4A and hot water introduced into the hot water inlet chamber 8 from the hot water inlet 5A are mixed. It does not directly contact the water opening 31 and the hot water opening 41 of the valves 11, 12, and 13, so that it becomes difficult to be affected by the water flow in each mixing valve 11, 12, and 13. , 12, 13 can be evenly distributed.

  The formation positions of the water introduction port 4A and the hot water introduction port 5A are not limited to one side surface and the other side surface of the valve body 2 as in the above-described embodiment. For example, as shown in FIG. The mouth 5A may be formed on the front surface of the valve body 2, and the hot water inlet 5A is formed on the front surface of the valve body 2 as shown in FIG. It is also possible to form it. Furthermore, the water inlet 4A and the hot water inlet 5A are not limited to one, and a plurality of water inlets may be formed as necessary.

  Moreover, in the said embodiment, although the multiple connection type mixing valve 1 provided with three mixing valves is illustrated, the number of mixing valves may be two or four or more. In addition, in the double-mixed mixing valve 1 having three mixing valves, when only two or one of the three mixing valves is used, the water opening 31 and the hot water opening of the unused mixing valve Measures such as closing 41 with another member, fixing (locking) the valve body 20 with the water opening 31 and the hot water opening 41 closed, or mounting a plug or the like on the outlet 6A. It is good to give.

  Moreover, in the said embodiment, although the cylindrical wall body 17 which has the opening part 31 for water and the opening part 41 for hot water is integrally provided in the valve body holding | suppressing 15, they are good also as another body. In this case, although the advantage and effect as described above due to the restriction of the position of the valve body performed by only one member of the valve body presser 15 integrally provided with the cylindrical wall body 17 is lost, By doing so, the valve body presser has a flat plate shape, so the manufacturing cost can be kept low. Also, the cylindrical wall body can be easily made by cutting the tube material, so the manufacturing cost can be kept low. Furthermore, the mixing characteristics (temperature characteristics) can be easily changed.

  Moreover, in the said embodiment, although each mixing valve 11, 12, 13 is arrange | positioned side by side on the straight line, those arrangement | positioning aspects can be changed freely within the range which a valve main body can shape | mold. For example, the mixing valves may be arranged alternately (staggered).

  On the other hand, each mixing valve 11, 12, 13 used in the multiple mixing valve 1 of the above embodiment has only a function of adjusting the mixing ratio of water and hot water (mixing function of water and hot water). However, in addition to this, the water inlet (water opening) is completely closed as described in the previous application by the applicant of the present application, for example, Japanese Patent Application No. 2007-144631. A function for adjusting only the flow rate of hot water (the amount of hot water delivered from the mixing valve) (hot water amount throttling function) may be added.

  Here, the example which added the hot water amount throttling function in addition to the mixing function of water and hot water to the mixing valve used with the double-mixing type mixing valve 1 of this embodiment is demonstrated easily. That is, as shown in FIGS. 14 and 15, the upper opening 30 </ b> A and the lower opening 30 </ b> B are formed on the valve body 20 ′ so as to partially overlap each other, and the cylindrical wall body 17. The water opening 31 'and the hot water opening 41' are provided with a water-side closing portion 45 and a hot water-side closing portion 46 so as to close a part (1/4) of the water opening 31 'and the hot water opening 41'. Thus, with the water opening 31 'fully closed, the opening area of the hot water opening 41' can be continuously changed from the maximum to the minimum while following the rotation angle of the valve body 20 '.

  By doing so, as shown in FIG. 12B, the opening area (flow rate) of the water opening 31 ′ is the maximum, and the opening area (flow rate) of the hot water opening 41 ′ is the minimum. When the position of the valve body 20 ′ becomes an initial position and the valve body 20 ′ is rotated from the initial position by a predetermined angle Rb in one direction, the opening area of the water opening 31 ′ gradually decreases and becomes minimum. When the valve body 20 ′ is further rotated to the predetermined angle Rc beyond the predetermined angle Rb, the opening area of the hot water opening 41 gradually decreases. By minimizing and rotating the valve body 20 ′ within the range of the predetermined angle Rb to the predetermined angle Rc, the hot water amount throttling function is obtained.

1 is a front view showing an embodiment of a double-mixing valve according to the present invention. FIG. 2 is a side view of the double-mixing valve shown in FIG. 1. The XX arrow expanded sectional view of FIG. The YY arrow expanded sectional view of FIG. FIG. 2 is a plan view of the valve body of the double-mixing mixing valve shown in FIG. 1. FIG. 6 is a cross-sectional view taken along the line ZZ in FIG. 5. The valve body of the double-mixing type mixing valve shown by FIG. 1 is shown, (A) is a side view, (B) is sectional drawing. Sectional drawing of the valve body holding | suppressing of the double connection type mixing valve shown by FIG. Sectional drawing which shows the modification of the valve body holding | suppressing shown by FIG. Sectional drawing which shows the example which changed the formation position of the hot water inlet in the double connection type mixing valve shown by FIG. Sectional drawing which shows the example which changed the formation position of the water inlet and the hot water inlet in the double-mixing mixing valve shown by FIG. The graph which shows the characteristic of the mixing valve used with the double connection type mixing valve shown by FIG. The figure which shows an example of the hot-water supply system in which the double connection type mixing valve shown by FIG. 1 is used. Sectional drawing of the opening part for water and the opening part for hot water used for description in the case of adding the hot water amount throttling function to the mixing valve used with the double connection type mixing valve shown by FIG. The perspective view of the valve body used for description in the case of adding the hot water amount throttling function to the mixing valve used with the double-mixing type mixing valve shown in FIG. The figure which shows an example of the conventional hot-water supply system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Duplex type mixing valve 2 Valve body 3 Main-body part 4A Water introduction port 5A Hot water introduction port 6A Outlet port 4, 5, 6 Joint 7 Water introduction chamber 8 Hot water introduction chamber 9 Bulkhead 11, 12, 13 Mixing valve 15 Valve body presser 17 Cylindrical wall body 20 Valve body 22 Peripheral wall part 30 Adjustment opening part 31 Water opening part 41 Hot water opening part 50 Stepping motor

Claims (9)

A plurality of mixing valves that can arbitrarily and independently change the mixing ratio of water and hot water are arranged in a single valve body in which a water inlet and a hot water inlet are formed ,
The valve body has a water introduction chamber and a hot water introduction chamber separated by a partition wall, and each mixing valve has a water opening opening in the water introduction chamber and a hot water opening opening in the hot water introduction chamber. A cylindrical wall body having a cylindrical inner peripheral surface formed with a portion, and rotatably fitted in the cylindrical wall body, and opening areas of the water opening and the hot water opening according to the rotation angle In order to continuously change, comprising a substantially cylindrical valve body in which an opening for adjustment is formed in the peripheral wall portion,
In the valve body, a single valve body presser that supports each valve body so as to be rotatable and restricts the position thereof is disposed . Together with the single ball valve retainer is detachable to said valve body, the cylindrical wall of the respective mixing valve in said valve body presser according to claim 1, characterized in that it provided integrally Double-mixing mixing valve. 3. The multiple mixing valve according to claim 1, wherein a plurality of outlets are formed in the valve body so as to individually derive the mixed hot water obtained from the mixing valves. Wherein each mixing valve, double continuous type mixing valve according to any one of claims 1 to 3, characterized in that it is arranged side by side in a straight line. The valve body presser is formed with a bearing hole through which a shaft portion protruding from the upper part of each valve body is inserted, and the valve body is individually rotated on the valve body presser. double continuous type mixing valve according to claim 1, any one of 4 to drive means, characterized in that it is a plurality arranged. The double mixing valve according to any one of claims 1 to 5 , wherein mixing characteristics are different in at least two mixing valves. The double-mixing mixing valve according to any one of claims 1 to 5 , wherein at least two mixing valves have different sizes and shapes of the water opening and / or the hot water opening. The water introduction port and the hot water introduction port include water introduced into the water introduction chamber from the water introduction port and hot water introduced from the hot water introduction port into the hot water introduction chamber, The double mixing valve according to any one of claims 1 to 7, wherein a formation position thereof is set so as not to directly contact the hot water opening. A hot water supply system, wherein the double-mixing valve according to any one of claims 1 to 8 is used.

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