JP6129490B2 - Double-mixing valve device - Google Patents

Description

  The present invention relates to a double-mixing type mixing valve device having a plurality of independent mixing valves capable of obtaining hot water of a desired temperature by mixing water and hot water, for example, a plurality of hot water supply destinations (uses) In addition, the present invention relates to a double-mixing mixing valve device suitable for use in a hot water supply system or the like that is 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 (stepping motor) for rotating the valve body, the valve main body is provided with a water inlet and a hot water inlet, and the water inlet and the hot water inlet of the valve body are provided on the peripheral wall portion of the valve body. One or more adjustment openings are provided to continuously change the opening area, and the valve body is rotated to adjust the mixing ratio of water and hot water, in other words, the temperature of the derived hot water. Mixing valves adapted to do so are known.

  A hot water supply system using such a mixing valve, in particular, as exemplified in Patent Document 2, for example, there are a plurality of hot water supply destinations (uses) such as a bath (bathroom), a hot water supply (kitchen), and a room heating. In a hot water supply system where there is a location and the temperature of hot water is required to be individually adjusted for each supply destination, a plurality of mixing valves as described above are used in accordance with the number of supply destinations (uses). It is like that. Specifically, in such a conventional hot water supply system, for example, the water supply (tap water) is heated to a predetermined temperature by heating means such as a heat pump unit and stored in the tank (circulated to maintain the predetermined temperature). Distribute the hot water from this tank to the hot water inlets of each mixing valve for bathing and hot water supply via piping, and distribute the water supply (tap water) to the water inlets of each mixing valve via piping. Then, the mixing ratio of water and hot water is adjusted so that hot water at a required temperature is obtained at each mixing valve, and supplied from the outlet to a necessary portion through a pipe.

  In addition, in the mixing valve as described above, it is known that a check valve is disposed at the water inlet or the hot water inlet in order to prevent backflow (leakage) and the like as seen in Patent Document 1. Yes. As the check valve, since the water inlet and the hot water inlet are usually formed in a circular shape in cross section, etc., the check valve has a cylindrical or circular ring-shaped portion inserted into the water inlet or the hot water inlet. A highly versatile one is usually used.

JP 2011-236882 A Japanese Patent Laid-Open No. 2003-176953

  However, in the conventional hot water supply system described above, the number of mixing valves corresponding to the number of hot water supply destinations (uses) is required, and piping and joints for distributing hot water and water to each mixing valve are provided. This necessitates an increase in the number of parts in the piping system and an increase in the occupied space, which imposes great restrictions on the layout of the constituent members and increases the equipment cost.

  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, the total cost was high.

  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. Another object of the present invention is to provide a multiple-mixing type mixing valve device capable of reducing the number of parts compared to the case where a plurality of normal mixing valves are used.

In order to achieve the above object, a double-mixing type mixing valve device according to the present invention basically includes a valve main body and a cylindrical valve body rotatably fitted on a guide wall portion of the valve main body. A plurality of mixing valves arranged side by side, and a motor provided on the valve body for rotating the valve body and a lead-out port protruding to the lower surface side of the guide wall portion In the mixing valve device, the plurality of motors are arranged on an upper surface side of the valve body, and the plurality of outlets are arranged on a lower surface side of the valve body, and the plurality of mixing valves are arranged on one side. provided with a lid-like member which forms a water inlet chamber having a water inlet port in the end, provided with a lid-like member which forms a water inlet chamber having the hot water inlet to the other end, double disposed in the plurality side by side The continuous mixing valve device includes an upper connection wall on the upper surface side of the valve body, a lower connection wall on the lower surface side of the valve body, To an intermediate connecting wall provided in the longitudinally intermediate portion of the plurality of mixing valve between said upper connecting wall Yuikabe are cut off between the hot water inlet chamber and the water inlet chamber It is characterized by.

In a preferred aspect of the present invention, a check valve is attached to at least one of the water inlet and the hot water inlet provided in each of the plurality of mixing valves. Preferably, at least one of the plurality of mixing valves is provided with a check valve only at one of the water inlet and the hot water inlet, and each of the other mixing valves has the above-described check valve. A check valve is attached to both the water inlet and the hot water inlet.

  In a preferred aspect of the present invention, a check valve is attached to at least one of the water inlet and the hot water inlet.

  The check valve preferably has a cylindrical valve seat member provided with a valve seat that is inserted into the water inlet and the hot water inlet, a valve body that contacts and separates from the valve seat, and holds the valve body Preferably, a valve stem having a valve body receiving portion and a cylindrical body portion, a cylindrical guide portion disposed on the inner peripheral side of the valve seat member and slidably inserted into the body portion of the valve stem, A connecting portion that connects the valve seat member and the cylindrical guide portion, and a valve closing spring comprising a compression coil spring that biases the valve body held by the valve rod in a direction of pressing the valve body against the valve seat. .

  In another preferred embodiment, in two adjacent mixing valves, in one mixing valve, the valve body is disposed near the central portion in the longitudinal direction or near one end, and in the other mixing valve, the valve body is disposed in the vicinity of the central portion in the longitudinal direction. It is arranged near the other end.

  In another preferred embodiment, each mixing valve has a motor for rotating the valve body, and the motor of each mixing valve is disposed obliquely with respect to the valve body in plan view.

  When applied to a hot water supply system in which the temperature of hot water is required to be individually adjusted for each supply destination, the double-mixing type mixing valve device according to the present invention connects a water pipe to the water inlet and introduces hot water. A hot water pipe may be connected to the outlet, and a hot water supply pipe may be connected to the outlet provided in each mixing valve, as in the conventional case. Therefore, conventionally, a plurality of hot water pipes and a plurality of water pipes are required. However, in the hot water supply system using the double-mixed mixing valve device 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 independently is used as many as the number of hot water supply destinations (uses), but in this example, the mixing ratio of water and hot water is arbitrarily independent. Although there are multiple mixing valves that can be changed, the valve body of each mixing valve is integrally molded, so the total number of parts of the mixing valve part used for mixing water and hot water can be reduced, Cost can be suppressed also from this point.

  In addition to the above, in the multiple mixing valve device of the present invention, the water inlet and the hot water inlet of the valve body of each mixing valve have a circular cross section, so that the cross section of the water inlet and the hot water inlet has other shapes (for example, , A polygon such as a rectangle and a triangle, an ellipse, an oval, a semicircle, and the like. That is, in order to prevent backflow (leakage), when a check valve is disposed at the water inlet and the hot water inlet, the check valve has a cylindrical or circular ring-shaped portion that is inserted into the water inlet and the hot water inlet. Further, it is possible to use one having high sealing properties and high versatility, and the cost can be suppressed from this point. In addition, since the water inlet and the hot water inlet are circular in cross section, the flow passage resistance is reduced and the flow is smoothed when the effective passage cross-sectional area is made the same as in other shapes. Also play.

The front view which shows one Example of the double-mixing type mixing valve apparatus which concerns on this invention. The right view which shows one Example of the double-mixing type mixing valve apparatus which concerns on this invention. The top view which shows one Example of the double connection type mixing valve apparatus which concerns on this invention. The bottom view which shows one Example of the double connection type mixing valve apparatus which concerns on this invention. FIG. 2 is a cross-sectional view taken along arrow AA in FIG. 1. BB arrow sectional drawing of FIG. CC sectional view taken on the line of FIG. EE arrow sectional drawing of FIG. FIG. 6 is a cross-sectional view taken along line FF in FIG. 5. GG arrow sectional drawing of FIG. HH arrow sectional drawing of FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a double-mixing mixing valve device of the present invention will be described with reference to the drawings.

  1, 2, 3, and 4 are a front view, a right side view, a plan view, and a bottom view showing an embodiment of a multiple-mixing valve device according to the present invention. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 1, and FIGS. 6 to 11 are BB, CC, EE, FF, GG, and HH in FIG. FIG. 5 is a cross-sectional view taken along the arrow, and a stepping motor 50 is displayed on the upper side for easy viewing of the drawing. In the cross-sectional views of FIG. 5 and subsequent figures, portions (such as the inside of the stepping motor 50) that are not so necessary for understanding the present invention are not shown or hatched.

  In the double-mixed mixing valve device 1 of the illustrated embodiment, for example, there are two hot water supply destinations (uses) such as a bath (bathroom, shower) and a hot water supply (kitchen), and hot water is supplied for each supply destination. Two mixing valves 11 having substantially the same basic configuration that can arbitrarily and independently change the mixing ratio of water and hot water. 12 (referred to as the first mixing valve 11 and the second mixing valve 12 as necessary).

  The mixing valves 11 and 12 are juxtaposed side by side, and the structure itself is well known. The water inlet 21 has a circular cross section on one end side (right side in FIG. 5), and the hot water has a circular cross section on the other end side. A substantially plastic valve body 20 made of synthetic resin provided with an inflow port 22 and rotatable in a valve body guide wall portion 25 provided perpendicular to the valve body 20 (to the center line). A substantially cylindrical valve body 30 inserted in a vertical direction and a stepping motor 50 as a driving means for rotating the valve body 30 are provided. In order to continuously change the opening area of the inlet 21 (the opening 21a) and the hot water inlet 22 (the opening 22a), a substantially elliptical adjustment opening 33 is provided to rotate the valve body 30. The mixing ratio of water and hot water, in other words, derived hot water It is adapted to adjust the temperature.

  The valve body 30 has a shaft portion 35 protruding from the center of the upper surface of the ceiling portion of the peripheral wall portion 32. An O-ring is attached to the lower portion of the shaft portion 35, and a spline shaft portion 36 (spline is not shown) and a non-circular shape are connected to the upper portion of the shaft portion 35 so as to be integrally rotatable with the rotor of the stepping motor 50. A convex portion 37 having a cross section (D-cut shape or the like) is provided.

  Further, a lead-out port 6 projects downward from the guide wall 25 of the valve body 30, and a stepping wall together with a support wall 26 that rotatably supports the shaft 35 of the valve body 20 at the top. A thick flange portion 26a on which the motor 50 is installed is continuously provided.

  And in the double-mixing mixing valve device 1 of the present embodiment, in order to connect the two mixing valves 11 and 12 side by side, provided in the valve body 20-20 on the upper surface side of each mixing valve 11 and 12, A top plate portion (upper connecting wall) 28A for connecting them, and a bottom plate portion (lower connecting wall) 28B provided between the valve main bodies 20-20 on the lower surface side of each mixing valve 11 and 12, An intermediate connection wall 27 is provided between the top plate portion 28A and the bottom plate portion 28B in the middle portion in the longitudinal direction of the mixing valves 11 and 12, and in FIG. The valve bodies 20, 20, the top plate portion 28A, the bottom plate portion 28B, and the intermediate connecting wall 27 are integrally formed of resin in this embodiment.

  Further, a water introduction chamber 8 and a hot water introduction port having a water introduction port 4 common to each of the mixing valves 11 and 12 with the intermediate connecting wall 27 interposed between one end side and the other end side of each mixing valve 11 and 12. A hot water introduction chamber 9 having 5 is formed. The water introduction chamber 8 and the hot water introduction chamber 9 are respectively the valve body outer wall of each mixing valve, the intermediate connecting wall 27, the top plate portion 28A, the bottom plate portion 28B, and the two mixing valves 11 and 12. And a pair of race-track-shaped lid members 29 and 29 that are attached to one end side and the other end side by ultrasonic welding or the like. When the inside is shut off, they are independent so that there is no flow of hot water.

  The intermediate connecting wall 27 has a crank-shaped cross section mainly based on the reasons for molding the valve body 20 (improved mold release, prevention of distortion and deformation, reduction of thick parts, etc.) The present invention is not limited to this shape.

  Further, in the present embodiment, the valve body 30 is disposed near one end (water introduction chamber 8) in the first mixing valve 11, and the valve body 30 is disposed in the vicinity of the central portion in the longitudinal direction or the other end (hot water) in the second mixing valve 12. The stepping motor 50 of the mixing valves 11 and 12 is disposed obliquely with respect to the valve body 20 in plan view. By doing so, the double-mixing type mixing valve device 1 can be miniaturized and the occupied space can be reduced, so that convenience such as incorporation into a hot water supply system can be achieved.

  In addition to the above configuration, a cylindrical fitting insertion portion 22b provided on the start end side (hot water introduction chamber 9 side) of the hot water inlet 22 in the first mixing valve 11, and the start end side of the hot water inlet 22 in the second mixing valve 12 A reverse flow (leakage) or the like is provided in each of the cylindrical insertion portion 22b provided on the (hot water introduction chamber 9 side) and the cylindrical insertion portion 21b provided on the start end side (water introduction chamber 8 side) of the water inlet 21. A check valve 60 having the same configuration for preventing this is mounted.

  When the check valve 60 is described as a representative of what is mounted on the cylindrical insertion portion 22b of the second mixing valve 12 (see FIG. 5), the valve seat that is inserted into the cylindrical insertion portion 22b. A cylindrical valve seat member 61 provided with 62, a rubber valve body 62a contacting and separating from the valve seat 62, a valve body retaining head 65a for holding the valve body 62a, a valve A valve stem 65 having a body receiving portion 65b and a cylindrical barrel portion 65c, and a cylindrical guide portion that is disposed on the inner peripheral side of the valve seat member 61 and into which the barrel portion 65c of the valve stem 65 is slidably fitted. 66, three connecting plate portions 67 (see FIG. 7) for connecting the valve seat member 61 and the cylindrical guide portion 66, and a direction in which the valve body 62a held by the valve rod 65 is pressed against the valve seat 62 ( A valve closing spring 68 made of a compression coil spring biasing in the valve closing direction), and the valve seat member 61 is a lid-like member It adapted to be hooked contact the semi-cylindrical inner protrusions 29a provided at both ends of the 9. The connecting plate portion 67 is not limited to three, and may be one, two, or four or more.

  The valve closing spring 68 is compressed between a valve body receiving portion 65b of the valve stem 65 and a spring receiving groove 69 (bottom portion) provided at the inner peripheral side ends of the three connecting plate portions 67. Yes. Further, a sealing material such as an O-ring is interposed between the cylindrical fitting insertion portion 22b and the cylindrical valve seat member 61.

  In the double-mixing mixing valve device 1 of this embodiment having such a configuration, when applied to a hot water supply system that requires the temperature of hot water to be individually adjusted for each supply destination, the water inlet 4 A water pipe is connected, a hot water pipe is connected to the hot water inlet 5, and hot water supply pipes may be connected to the outlets 6 and 6 provided in the mixing valves 11 and 12, respectively. . Therefore, conventionally, a plurality of hot water pipes and a plurality of water pipes are required. However, in the hot water supply system using the multiple mixing valve device 1 of the embodiment of the present invention, the hot water pipe and the water pipe are respectively provided. Just one by one. 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 independently is used as many as the number of hot water supply destinations (uses), but in this example, the mixing ratio of water and hot water is arbitrarily independent. Although there are a plurality of mixing valves that can be changed, the valve body 20 of each mixing valve 11, 12 is integrally formed, so the total number of parts of the mixing valve portion used for mixing water and hot water The cost can also be reduced from this point.

  In addition to the above, in the multiple mixing valve device 1 according to the embodiment of the present invention, the water inlet 21 and the hot water inlet 22 of the valve body 20 of each mixing valve 11 and 12 are circular in cross section. Compared to the case where the cross section of the inlet 22 is formed in another shape (for example, a polygon such as a rectangle or a triangle, an ellipse, an oval, or a semicircle), the following advantages are provided. That is, when a check valve is arranged at the water inlet 21 and the hot water inlet 22 to prevent backflow (leakage), a cylindrical or circular ring inserted into the water inlet 21 and the hot water inlet 22 as the check valve. It is possible to use a seal portion and a highly versatile one having a shape portion, and the cost can be suppressed from this point. Further, the water inlet 21 and the hot water inlet 22 are circular in cross section, so that the flow path resistance is reduced and the flow becomes smooth when the effective passage cross-sectional area is made the same as in other shapes than in other shapes. There is also an effect.

  In the above embodiment, two mixing valves are exemplified, but three or more mixing valves may be used, and in this case, the present invention can be applied in the same manner as the above embodiment.

  In addition, pipes for branching hot water and water flowing in from the water inlet 4 and the hot water inlet 5 to other devices without passing through the valve body 30 are provided in each valve body 20 or the lid member 29 or the like. Of course, a pipe for branching the hot and cold water mixed in each valve body 30 to another device may be provided in the outlet 6.

DESCRIPTION OF SYMBOLS 1 Double connection type mixing valve apparatus 4 Water inlet 5 Hot water inlet 6 Outlet 8 Water inlet chamber 9 Hot water inlet chamber 11, 12 Mixing valve 20 Valve main body 21 Water inlet 22 Hot water inlet 30 Valve body 32 Circumferential wall 33 For adjustment Opening 50 Stepping motor 60 Check valve

Claims (6)

A valve body, a cylindrical valve body rotatably fitted on the guide wall portion of the valve body, a motor provided on the valve body for rotating the valve body, and a lower surface of the guide wall portion A multiple mixing valve device in which a plurality of mixing valves provided side by side are arranged side by side,
The plurality of motors are arranged on the upper surface side of the valve body, the plurality of outlets are arranged on the lower surface side of the valve body, and the plurality of mixing valves have a water inlet at one end. A lid-like member that forms an introduction chamber and a lid-like member that forms a hot water introduction chamber having a hot water inlet at the other end are provided .
The plurality of side-by-side multiple mixing valve devices include an upper connection wall on the upper surface side of the valve body, a lower connection wall on the lower surface side of the valve body, and the lower connection wall and the upper connection wall. A double-mixing type mixing valve device comprising: an intermediate connecting wall provided at a middle portion in the longitudinal direction of the plurality of mixing valves between the water introduction chamber and the hot water introduction chamber . The double-mixing type mixing valve device according to claim 1 , wherein a check valve is attached to at least one of the water inlet and the hot water inlet provided in each of the plurality of mixing valves . At least one of the plurality of mixing valves is provided with a check valve only at one of the water inlet and the hot water inlet, and the other mixing valves are provided with the water inlet and the hot water, respectively. The double-mixing type mixing valve device according to claim 1, wherein a check valve is attached to any of the inflow ports. The check valve includes a cylindrical valve seat member provided with a valve seat that is inserted into the water inlet and the hot water inlet, a valve body that contacts and separates from the valve seat, and a valve body that holds the valve body. A valve stem having a valve body receiving portion and a columnar body, a cylindrical guide portion that is disposed on the inner peripheral side of the valve seat member and into which the body of the valve stem is slidably inserted, and A connecting portion that connects the valve seat member and the cylindrical guide portion, and a valve closing spring that includes a compression coil spring that biases the valve body held by the valve rod in a direction of pressing the valve body against the valve seat. The double-mixing type mixing valve device according to claim 2 or 3.   In two adjacent mixing valves, one of the mixing valves has the valve body disposed near the center in the longitudinal direction or near one end, and the other mixing valve has the valve body disposed near the center in the longitudinal direction or near the other end. The double-mixing type mixing valve device according to any one of claims 1 to 4, wherein   6. The multiple mixing valve device according to claim 1, wherein each of the mixing valves is configured such that the motors are arranged obliquely with respect to the valve body in a plan view.

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