JP2013137076A - Valve apparatus, and water heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve apparatus capable of sufficiently sealing a flow passage, and to provide a water heating apparatus including the valve apparatus.SOLUTION: A valve apparatus 1 includes: a valve body 11 including a first opening 11a and a second opening 11b and including a flow passage 11A to make a medium flow to the inside; a shaft body 12 which is disposed in the flow passage 11A of the valve body 11 and is configured to be rotatable with an axial line C-C as a center; a first valve element 13a which is connected to the shaft body 12 to be located between the first opening 11a and the second opening 11b in the flow passage 11A and has a shape in which a first notch 13ais formed in a disk shape with the axial line C-C as a center; and a first shielding portion 14a disposed in the flow passage 11A so that the first notch 13aof the first valve element 13a can be opened/closed by rotation with an axis 12 of the first valve element 13a as a center. The first valve element 13a is disposed on an upstream side of a flow A of the medium flowing in the flow passage 11A in relation to the first shielding portion 14a.

Description

  The present invention relates to a valve device and a hot water supply device including the valve device.

  The water heater is provided with a valve device for adjusting a distribution ratio to the bypass circuit and the heat exchanger. The valve device is described in, for example, Japanese Patent Laid-Open No. 4-141709 (Patent Document 1). The valve device described in this publication is a hot / cold water mixing valve having a valve shaft in which a hot water valve body and a water valve body are mounted in a mixing chamber connected to both the hot water flow path and the water flow path. doing. By moving the valve shaft in the axial direction by rotation, the opening degree of the hot water valve body relative to the hot water valve seat and the opening degree of the water valve body relative to the water valve seat are adjusted, and the mixing ratio of hot water and water Is controlled.

JP-A-4-141709

  However, in the valve device described in the above publication, the hot water valve body is disposed downstream of the hot water passage from the hot water valve seat, and the water valve body is also disposed downstream of the water flow passage from the water valve seat. ing. Accordingly, a force is applied to the hot water valve body in a direction away from the hot water valve seat by the hot water flowing through the hot water flow path, and a force is applied to the water valve body in a direction away from the water valve seat by the water flowing through the water flow path. . For this reason, hot water may leak from between the hot water valve body and the hot water valve seat, and water may leak from between the water valve body and the water valve seat. Therefore, when the hot water valve body and the water valve body fully close the hot water channel and the water channel, respectively, there is a problem that the hot water channel and the water channel cannot be sufficiently sealed.

  This invention is made | formed in view of said subject, The objective is to provide the valve apparatus which can fully seal a flow path, and a hot-water supply apparatus provided with the same.

  The valve device of the present invention has a first opening and a second opening, and includes a valve main body including a flow path for flowing a medium therein, and is disposed in the flow path of the valve main body, and A shaft that is configured to be rotatable about an axis, and a disk that is connected to the shaft so as to be positioned between the first opening and the second opening in the flow path and that is centered on the axis The first valve body having a shape in which the first notch is formed and the first notch of the first valve body can be opened and closed by rotation around the axis of the first valve body. And a first shielding part disposed in the road. The first valve body is disposed on the upstream side of the flow of the medium flowing in the flow path with respect to the first shielding portion.

  According to the valve device of the present invention, the first valve body is disposed on the upstream side of the flow of the medium flowing through the inside of the flow path with respect to the first shielding portion. For this reason, the first valve body is pressed against the first shielding part by the medium flowing inside the flow path. Therefore, the first valve body and the first shielding part can be brought into close contact with each other. Thereby, it can suppress that a medium leaks from between a 1st valve body and a 1st shielding part. Therefore, the flow path can be sufficiently sealed.

  In the above valve device, the flow path has a third opening that sandwiches the first opening with the second opening. The valve device is connected to the shaft so as to be positioned between the first opening and the third opening in the flow path, and has a shape in which a second notch is formed in a disk shape centering on the axis. And a second shielding part disposed in the flow path so that the second notch of the second valve body can be opened and closed by rotation about the axis of the second valve body Is further provided.

  Accordingly, the first and second notches can be opened and closed by the rotation of the first and second valve bodies, and the opening degree of the flow path between the first opening and the second opening is determined. The opening degree of the flow path between the first opening and the third opening can be adjusted simultaneously. For this reason, it is possible to simultaneously control the flow rate between the first opening and the second opening and the flow rate between the first opening and the third opening.

  Further, it is not necessary to move the first and second valve bodies together with the shaft body in the axial direction in order to adjust the opening degree. Therefore, it is not necessary to thread the shaft body, and the shaft body can be thinned, so that a drive source (for example, a motor) for rotating the shaft body can be reduced in size. Therefore, it is possible to adjust the distribution ratio or the mixing ratio with a small and simple configuration.

  In the above valve device, the spacer having the first and second shielding portions is provided separately from the valve body and is fixed to the wall surface of the flow path of the valve body. Thereby, it can prevent that a spacer rotates with a shaft body at the time of rotation of a shaft body.

  In the above valve device, the valve device further includes a gap forming convex portion provided on at least a part of at least one of the surfaces of the first valve body and the first shielding portion facing each other. Thereby, the area by which the foreign material is pinched | interposed in the mutually opposing surface of a 1st valve body and a 1st shielding part by the clearance gap formation convex part can be made small. For this reason, it can suppress that a foreign material is pinched.

  In the above valve device, the flow path has a fourth opening between the second opening and the third opening. Thereby, the water pressure inlet of the backflow prevention valve can be connected to the fourth opening, and a stable water pressure can be applied from the fourth opening.

  The hot water supply apparatus of the present invention includes any one of the above valve devices, a heat exchanger connected to one of the second and third openings of the valve device, and the second and third valve devices. And a bypass circuit connected to either one of the openings.

  According to the hot water supply apparatus of the present invention, it is possible to obtain a hot water supply apparatus that can sufficiently seal the flow path.

  In the above-described hot water supply apparatus, the first shielding portion has a shape in which the third notch is formed in a disk shape centering on the axis, and the third notch is in a state where the valve device is attached to the hot water supply apparatus. Is configured to be positioned at the lowermost portion of the first shielding portion. Thereby, the medium can be discharged from the third cutout located at the lowermost portion of the first shielding portion. Therefore, the drainage of the valve device can be improved. For this reason, freezing of residual water can be made difficult to occur.

  As described above, according to the present invention, it is possible to obtain a valve device capable of sufficiently sealing a flow path and a hot water supply device including the valve device.

It is a perspective view which shows roughly the structure of the valve apparatus and stepping motor in one embodiment of this invention. It is a figure which shows roughly the cross section of the valve apparatus part in the valve apparatus and stepping motor shown in FIG. It is a disassembled perspective view which shows schematically the structure of the valve apparatus shown in FIG. It is a figure for demonstrating the shape of the 1st and 2nd valve body used for the valve apparatus shown in FIG. It is a perspective view which shows roughly the structure of the spacer used for the valve apparatus shown in FIG. 1 from the lower side. It is a perspective view which shows roughly the structure of the spacer used for the valve apparatus shown in FIG. 1 from the upper side. FIG. 2 is a perspective view schematically showing a configuration of a shaft body, a valve body, a spacer and the like used in the valve device shown in FIG. 1. It is a fracture | rupture perspective view of the valve main body used for the valve apparatus shown in FIG. It is sectional drawing which shows a mode that the spacer was fixed to the valve main body in the valve apparatus shown in FIG. It is sectional drawing for demonstrating the radial clearance between a valve body and the flow-path wall surface inside a valve main body in the valve apparatus shown in FIG. It is a disassembled perspective view which shows the structure by which the convex part for clearance gap was provided in the valve body in the valve apparatus shown in FIG. It is sectional drawing which shows a mode that the spacer was fixed so that the right half of the flow path of a valve main body might be covered in the valve apparatus shown in FIG. It is sectional drawing which shows the structure of the valve body and shielding part of the modification 1 of the P1 part of FIG. It is sectional drawing which shows the structure of the valve body and shielding part of the modification 2 of the P1 part of FIG. It is sectional drawing which shows the structure of the valve body and shielding part of the modification 3 of the P1 part of FIG. It is sectional drawing which shows the structure of the valve body and shielding part of the modification 4 of the P1 part of FIG. It is a figure which shows schematically the structure of the hot water supply apparatus using the valve apparatus and stepping motor which are shown in FIG. It is a figure for demonstrating operation | movement of the valve apparatus shown in FIG. It is sectional drawing which shows roughly the structure of the modification of a valve apparatus. It is a disassembled perspective view which shows roughly the structure of the axial body used for the valve apparatus shown in FIG. 12, a valve body, and a shielding part. It is a figure which shows schematically the structure of the hot-water supply apparatus with a remedy using the valve apparatus and stepping motor which are shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the configuration of the valve device and the stepping motor of the present embodiment will be described with reference to FIGS.

  Referring mainly to FIG. 1, a stepping motor 2 is attached and fixed to the valve device 1 of the present embodiment. As will be described later, the stepping motor 2 is configured so that the shaft body and the valve body in the valve device 1 can be rotationally driven.

  Referring mainly to FIGS. 2 and 3, the valve device 1 of the present embodiment includes a valve body 11, a shaft body 12, first and second valve bodies 13a and 13b, a spacer 14, and a valve. It mainly has a collar 15 and O-rings 16a and 16b.

  The valve body 11 has a flow path 11A for flowing a medium inside. The flow path 11A has a first opening 11a, and a second opening 11b and a third opening 11c arranged so as to sandwich the first opening 11a. Further, the valve body 11 is formed with a fourth opening 11d leading to the flow path 11A. The channel 11A has a fourth opening 11d between the second opening 11b and the third opening 11c.

  The valve device 1 is a distribution valve, the first opening 11a is an inlet for fluid (for example, hot water), and the second and third openings 11b and 11c are outlets for fluid. In particular, the fourth opening portion 11d is a portion that serves as a water pressure outlet for applying the primary pressure of clean water to the backflow prevention valve when the valve device 1 is used in a hot water supply device with a supplement.

  The shaft body 12 is disposed in the flow path 11A of the valve body 11, and is configured to be rotatable about a virtual axis CC. That is, the shaft body 12 can be rotated about the axis C-C by being supported by the valve body 11 via the valve collar 15 attached to the outer peripheral portion on one end side of the shaft body 12.

  An O-ring 16 a is disposed between the shaft body 12 and the valve collar 15, and an O-ring 16 b is disposed between the valve collar 15 and the valve body 11. Further, the stepping motor 2 is connected to one end of the shaft body 12 so that the shaft body 12 is given a rotational driving force by a stepping motor (drive source) 2. The stepping motor 2 is fixedly attached to the valve body 11 with a servo mounting plate 3 interposed.

  Each of the first and second valve bodies 13 a and 13 b is attached to the shaft body 12. The first valve body 13a is located between the first opening 11a and the second opening 11b in the flow path 11A. The second valve body 13b is located between the first opening 11a and the third opening 11c in the flow path 11A.

Referring mainly to FIG. 4, the first valve body 13 a has a shape in which the first notch 13 a ₁ is formed in a disk shape centered on the axis C-C. The first notch 13a ₁ is provided in an angular range of about 180 ° around the center O of the disc-shaped first valve body 13a. A portion 13a ₂ of the first valve body 13a in which the first notch 13a ₁ is not provided has an arc shape. Further, the portion of the first valve body 13a provided with the first notch 13a ₁ has an outer shape resembling an involute curve, for example.

Similarly to the first valve body 13a, the second valve body 13b has a shape in which the second notch 13b ₁ is formed in a disk shape with the axis C-C as the center O. The second notch 13b ₁ is provided in an angular range of about 180 ° around the center O of the disc-shaped second valve body 13b. A portion 13b ₂ of the second valve body 13b in which the second notch 13b ₁ is not provided has an arc shape. The portion of the second valve body 13b provided with the second notch 13b ₁ has an outer shape resembling an involute curve, for example.

Specifically first and second notches 13a _1, 13b _1, when rotating the shaft body 12 in the arrow RD direction in FIG. 4, the first and second notches 13a _1, each of 13b ₁ It has a shape such that the change in the area of the portion opened from the first and second shielding portions 14 a and 14 b is proportional to the square of the rotation angle of the shaft body 12.

Since both the first and second valve bodies 13a and 13b are attached to one shaft body 12, the center O of the first valve body 13a and the center O of the second valve body 13b are the same axis. It is located on (straight line) CC. The radius R1 from the center O of the arc portion 13a ₂ of the first valve body 13a may be the same as or different from the radius R2 from the center O of the arc portion 13b ₂ of the second valve body 13b. Also good. In the present embodiment, the radius R2 is smaller than the radius R1.

The first notch 13a ₁ is preferably arranged so as to be point-symmetric with respect to the second notch 13b ₁ with the axis C-C as the center O when viewed from the direction of the axis CC. . As described above, in the present embodiment, when the radius R2 is smaller than the radius R1, the shape of the first valve body 13a viewed from the direction of the axis CC is the shape of the second valve body 13b. It has a similar shape.

Referring mainly to FIGS. 3 and 5, the spacer 14 mainly includes first and second shielding portions 14a and 14b, a connecting portion 14c, and two convex engaging portions 14d. . The first shielding portion 14a is disposed in the first notch 13a ₁ flow passage 11A to allow opening and closing of the first axis C-C first valve body 13a by rotation around the valve body 13a ing. The second shielding portion 14b is disposed on the second notch 13b ₁ flow passage 11A to allow opening and closing of the second valve body 13b by rotation about the axis C-C of the second valve body 13b Has been.

Each of the first and second shielding portions 14a and 14b has, for example, a semicircular shape. Each of the semicircular outer peripheral end surfaces 14a ₁ and 14b ₁ of each of the first and second shielding portions 14a and 14b is a portion that abuts against the wall surface of the flow path 11A (hereinafter also referred to as “flow path wall surface”). Each of the inner peripheral end surfaces 14 a ₂ and 14 b ₂ is a portion that abuts on the outer peripheral surface of the shaft body 12.

Each of the first and second shielding portions 14a and 14b has a shape in which third notches 14a ₃ and 14b ₃ are formed in a disk shape centered on the axis C-C. The third cutouts 14a ₃ and 14b ₃ are provided in an angular range of about 180 ° around the axis CC. Each of the first and second shielding portions 14a and 14b is configured such that the third notches 14a ₃ and 14b ₃ are the first and second shielding portions 14a and 14b in a state in which the valve device 1 is attached to a hot water supply device described later. It is comprised so that it may be located in the lowest part of each. Here, the lowest part is a part located at the lowest in the vertical direction.

  The connecting portion 14 c is a portion connected to both the first and second shielding portions 14 a and 14 b and has a semi-cylindrical portion that covers the outer peripheral surface along the outer peripheral surface of the shaft body 12. . A through hole 14e extending in a direction orthogonal to the axis C-C direction is formed in the connecting portion 14c. The two convex engaging portions 14d are disposed at both end portions of the connecting portion 14c, respectively, and protrude toward the outer peripheral side from the outer peripheral end portions of both the first and second shielding portions 14a and 14b. It extends in the CC direction.

Referring mainly to FIGS. 2 and 6, spacer 14 is provided separately from valve body 11. The 1st shielding part 14a has the convex part GP for gap formation in the surface facing the 1st valve body 13a. Moreover, the 2nd shielding part 14b has the convex part GP for gap formation in the surface facing the 2nd valve body 13b. The gap forming convex part GP is formed so as to protrude in a direction facing the first valve body 13a and the second valve body 13b along each of the inner peripheral end faces 14a ₂ and 14b ₂ .

  A step is formed on the surface of the first shielding portion 14a facing the first valve body 13a and the surface of the second shielding portion 14b facing the second valve body 13b by the gap forming convex portion GP. . For this reason, each gap formation convex part GP of the surface facing the first valve body 13a of the first shielding part 14a and the surface facing the second valve body 13b of the second shielding part 14b is formed. In the part which is not, the clearance gap is formed between each of the 1st valve body 13a and the 2nd valve body 13b.

Referring mainly to FIGS. 2 and 7, the spacer 14 is sandwiched between the first valve body 13a and the second valve body 13b, and the second valve body 13b is inserted into the through hole 14e. By doing so, it is attached to the shaft body 12. The first valve body 13a is disposed on the upstream side of the flow A of the medium flowing in the flow path 11A with respect to the first shielding portion 14a. In this attached state, each of the inner peripheral end surface 14 a ₂ of the first shielding portion 14 a and the inner peripheral end surface 14 b ₂ of the second shielding portion 14 b is in contact with the outer peripheral surface of the shaft body 12. In this attached state, the semi-cylindrical portion of the connecting portion 14 c covers the outer peripheral surface along the outer peripheral surface of the shaft body 12. In this attached state, the first and second shielding portions 14a and 14b are located in the same direction with respect to the axis CC.

By rotating the shaft body 12 with respect to the spacer 14 in this attached state, the first notch 13a ₁ can be opened and closed by the first shielding part 14a, and the second notch 13b ₁ is opened by the second shielding part. It can be opened and closed at 14b. The first and second cutouts 13a ₁ and 13b ₁ are positioned in different directions with respect to the axis CC, and the first and second shielding portions 14a and 14b are the same with respect to the axis CC. Since it is located in the direction, the second shielding part 14b can open the second notch 13b ₁ when the first shielding part 14a closes the first notch 13a ₁ . Conversely, when the first shielding portion 14a is open the first notch 13a _1, the second shielding portion 14b can also be closed second notch 13b _1.

Referring mainly to FIGS. 8 and 9, a linear groove 11 e extending in the direction in which the axis C-C extends is formed in the flow path wall surface of the valve body 11. The spacer 14 can be fixed to the flow channel wall surface by being inserted into the flow channel 11A while being guided by the groove 11e in a state where the convex engagement portion 14d is fitted in the groove 11e. That is, in the state where the spacer 14 is inserted into the flow path 11A, each of the convex engaging portions 14d on both sides of the spacer 14 is fitted in the groove 11e, so that the shaft body 12 rotates about the axis C-C. Even so, the spacer 14 does not rotate with the shaft body 12. Further, as shown in FIG. 9, in a state where the valve device 1 is attached to a hot water supply device to be described later, the third notch 14a ₃ of the first shielding portion 14a is located at the lowermost portion of the first shielding portion 14a. Yes.

Referring mainly to FIG. 9, each of the first and second shielding portions 14 a and 14 b of the spacer 14 is on the other end side of the shaft body 12 (opposite side to one end connected to the stepping motor 2). The shaft body 12 is supported in the radial direction of the shaft body 12 with respect to the channel wall surface. Specifically, the semicircular outer peripheral end surfaces 14a ₁ and 14b ₁ of each of the first and second shielding portions 14a and 14b abut against the circular wall surface of the flow path 11A, and the first and second shielding portions. The semicircular inner peripheral end surfaces 14 a ₂ and 14 b ₂ of each of 14 a and 14 b are in contact with the outer peripheral surface of the shaft body 12.

  Further, the semi-cylindrical portion of the connecting portion 14 c of the spacer 14 may be in contact with the outer peripheral surface of the shaft body 12. The first and second shielding portions 14a and 14b and the connecting portion 14c are in contact with the outer peripheral surface of the shaft body 12 within a range of 180 °, for example.

  Referring mainly to FIG. 2, it is particularly preferable that the first shielding portion 14a supports the shaft body 12 in the radial direction on the other end side with respect to the first valve body 13a. Moreover, it is preferable that the spacer 14 having the first and second shielding portions 14a and 14b is disposed at a position facing the opening position of the first opening portion 11a into the flow path 11A in the radial direction.

Referring mainly to FIGS. 2 and 10, there is a slight radial gap (dimension L1) between the arc portion 13a ₂ of the first valve body 13a and the flow path wall surface, and the arc portion 13a ₂ It is preferable that the channel wall surface is not in direct contact. Further, it is preferable that there is a radial gap (dimension L2) between the arc portion 13b ₂ of the second valve body 13b and the flow path wall surface, and the arc portion 13b ₂ and the flow path wall surface are not in direct contact with each other.

  The first, third, and fourth openings 11a, 11c, and 11d are provided in a direction orthogonal to the axis C-C, and the second opening 11b is provided in a parallel direction. It is preferable.

  The valve body 11, the shaft body 12, the first and second valve bodies 13a and 13b, the spacer 14 and the valve collar 15 are made of a resin such as PPS (polyphenylene sulfide), and the servo mounting plate 3 is made of zinc, for example. It consists of a plated steel sheet. The first and second valve bodies 13a and 13b may be formed integrally with the shaft body 12, or are separate from the shaft body 12 and are attached and fixed to the shaft body 12. May be.

The first and second notches 13a ₁ and 13b ₁ provided in the first and second valve bodies 13a and 13b are both formed in an angle range of about 180 °. The formation angle ranges of the first and second cutouts 13a ₁ and 13b ₁ may both be less than 180 ° or may exceed 180 °.

  In the above embodiment, the configuration in which the gap forming convex portion GP is provided in each of the first and second shielding portions 14a and 14b has been described. However, the gap forming convex portion GP has the first What is necessary is just to be provided in at least any one part of the mutually opposing surface of the valve body 13a and the 1st shielding part 14a. Further, the gap forming convex portion GP may be provided on at least a part of at least one of the surfaces of the second valve body 13b and the second shielding portion 14b facing each other. Therefore, the gap forming convex portion GP may be provided on the first and second shielding portions 14a and 14b, or may be provided on the first and second valve bodies 13a and 13b. Hereinafter, a configuration in which the gap forming convex portion GP is provided in the first valve body 13a will be described.

  Referring to FIG. 11, the first valve body 13a has a gap forming convex portion GP on the surface facing the first shielding portion 14a. The gap forming convex part GP is formed around the radial direction of the shaft body 12 so as to protrude in a direction facing the first shielding part 14a. Further, the second valve body 13b may have a gap forming convex part GP on the surface facing the second shielding part 14b. The gap forming convex part GP may be formed around the radial direction of the shaft body 12 so as to protrude in a direction facing the second shielding part 14b.

In the above-described embodiment, the configuration in which the spacer 14 is disposed on the upper side of the flow path 11A has been described. However, the spacer 14 is configured so that the valve device 1 is attached to the hot water supply device. It is only necessary that the third notch 14a ₃ is located at the lowermost part of the first shielding part 14a. Hereinafter, a configuration in which the spacers 14 are arranged over the flow path 11A will be described.

Referring to FIG. 12, spacer 14 is arranged to cover the right half of flow path 11 </ b> A in a state where valve device 1 is attached to the hot water supply device. In this state, the third notch 14a ₃ of the first shielding portion 14a is arranged to extend in the vertical direction of the flow path 11A. Even in this state, the third notch 14a ₃ of the first shielding part 14a is located at the lowermost part of the first shielding part 14a. In this state, the left half of the flow path 11A is not covered with the spacer 14, so that the medium can flow to the lowermost part of the flow path 11A through the third notch 14a ₃ of the first shielding portion 14a.

  In the above embodiment, the first valve body 13a is attached to the other end side of the shaft body 12, and the second valve body 13b is attached to the one end side of the shaft body 12. As described above, the first valve body 13 a may be attached to one end side of the shaft body 12, and the second valve body 13 b may be attached to the other end side of the shaft body 12. Hereinafter, a configuration in which the first valve body 13a is attached to one end side of the shaft body 12 and the second valve body 13b is attached to the other end side of the shaft body 12 will be described.

  Referring to FIG. 13, first valve body 13 a is attached to one end side of shaft body 12, and second valve body 13 b is attached to the other end side of shaft body 12. Further, the first shielding portion 14 a is disposed on one end side of the shaft body 12, and the second shielding portion 14 b is disposed on the other end side of the shaft body 12. The first valve body 13a is disposed on the upstream side of the flow A of the medium flowing in the flow path 11A with respect to the first shielding portion 14a.

  In the above-described embodiment, the configuration in which only the first valve body 13a is arranged on the upstream side of the flow of the medium flowing inside the flow path 11A with respect to the first shielding portion 14a has been described. The second valve body 13b may also be disposed on the upstream side of the flow A of the medium flowing inside the flow path 11A with respect to the second shielding portion 14b. Hereinafter, a configuration in which the second valve body 13b is also arranged on the upstream side of the flow A of the medium flowing inside the flow path 11A with respect to the second shielding portion 14b will be described.

  Referring to FIG. 14, a first shielding portion 14 a composed of two shielding plates is arranged on one end side and the other end side of shaft body 12 so as to sandwich first valve body 13 a. A second shielding portion 14b made of two shielding plates is disposed on one end side and the other end side of the shaft body 12 so as to sandwich the second valve body 13b. The first valve body 13a is disposed on the upstream side of the flow A of the medium flowing in the flow path 11A with respect to one shielding plate of the first shielding portion 14a. The second valve body 13b is also arranged on the upstream side of the flow A of the medium flowing in the flow path 11A with respect to one shielding plate of the second shielding portion 14b.

  2 and 14, when the valve device 1 is used as a mixing valve, the medium flows from the second opening 11b and the third opening 11c through the flow path 11A. Even when the valve device 1 is used as a mixing valve, the first valve body 13a is disposed on the upstream side of the flow B of the medium flowing in the flow path 11A with respect to the other shielding plate of the first shielding portion 14a. ing. The second valve body 13b is disposed upstream of the flow B of the medium flowing in the flow path 11A with respect to the other shielding plate of the second shielding portion 14b.

  Further, the first and second shielding portions 14a and 14b may be disposed only at positions sandwiched between the first and second valve bodies 13a and 13b. Referring to FIG. 15, the first and second shielding portions 14 a and 14 b are disposed so as to be sandwiched between the first and second valve bodies 13 a and 13 b. When the valve device 1 is used only as a mixing valve, the first valve body 13a is arranged on the upstream side of the medium flow B flowing in the flow path 11A with respect to the first shielding part 14a. The second valve body 13b is disposed on the upstream side of the flow B of the medium flowing in the flow path 11A with respect to the second shielding portion 14b.

  In addition, the first and second shielding portions 14a and 14b may be disposed only at positions where the first and second valve bodies 13a and 13b are sandwiched. Referring to FIG. 16, first and second shielding portions 14a and 14b are arranged so as to sandwich first and second valve bodies 13a and 13b. When the valve device 1 is used only as a distribution valve, the first valve body 13a is arranged on the upstream side of the flow A of the medium flowing in the flow path 11A with respect to the first shielding portion 14a. The second valve body 13b is disposed on the upstream side of the flow A of the medium flowing in the flow path 11A with respect to the second shielding portion 14b.

  Next, the structure of the hot water supply device having the valve device 1 of the present embodiment will be described with reference to FIG.

  Referring to FIG. 17, hot water supply device 20 includes valve device 1, stepping motor 2, heat exchanger 21, bypass circuit 22, combustion burner 23, blower 24, water supply pipe 31, and hot water supply pipe 32. And has mainly.

  Connected to the heat exchanger 21 are a water supply pipe 31 for supplying water to the heat exchanger 21 and a hot water supply pipe 32 for discharging hot water from the heat exchanger. A bypass circuit (bypass pipe) 22 connects the water supply pipe 31 and the hot water supply pipe 32.

  The heat exchanger 21 exchanges heat with the combustion gas generated in the combustion burner 23, and the blower 24 supplies air necessary for combustion to the combustion burner 23. The valve device 1 of the present embodiment having the configuration shown in FIGS. 1 to 10 is connected to, for example, a connection portion between a water supply pipe 31 and a bypass circuit 22.

  Referring mainly to FIG. 2 and FIG. 17, the first opening 11 a of the valve device 1 is connected to the water supply side portion 31 a of the water supply pipe 31, and the third opening 11 c is a heat exchange of the water supply pipe 31. It is connected to the vessel side portion 31b. The second opening 11 b is connected to the bypass circuit 22.

  In the hot water supply device 20, the valve device 1 is disposed at the connection portion between the water supply pipe 31 and the bypass circuit 22, so that the distribution ratio to the heat exchanger 21 and the bypass circuit 22 can be adjusted by the valve device 1. it can.

  That is, in the hot water supply device 20, the water entering the device is once distributed to the heat exchanger 21 side and the bypass circuit 22 side, and the high-temperature water that has passed through the heat exchanger 21 and the low-temperature water that has passed through the bypass circuit 22 are separated. The desired tapping temperature is obtained by mixing. At this time, by adjusting the distribution ratio by the valve device 1, it becomes possible to control to a desired tapping temperature.

Next, operation | movement of the valve apparatus 1 of this Embodiment is demonstrated using FIG. 18 (A)-FIG. 18 (C). In a state where the valve device 1 is attached to the hot water supply device 20, the third notches 14a ₃ and 14b ₃ of the first and second shielding portions 14a and 14b are the lowermost portions of the first and second shielding portions 14a and 14b. Is located.

Referring to FIG. 18A, this state is that the first notch 13a ₁ of the first valve body 13a is not covered with the first shielding portion 14a and is open (fully opened), and The entire second notch 13b ₁ of the second valve body 13b is covered with the second shielding portion 14b and closed (fully closed). In this state, as shown in FIG. 2, a fluid (for example, hot water) can flow between the first opening 11a and the second opening 11b, and the first opening 11a and the third opening. The fluid flow is blocked from the part 11c.

In FIG. 18A, of the portions where the first and second cutouts 13a ₁ and 13b ₁ are formed, the open portions that are not covered by the first and second shielding portions 14a and 14b are hatched. Is attached. This hatching is similarly applied to FIGS. 18B and 18C.

Referring to FIG. 18B, this state is a state in which shaft body 12 is rotated about 90 ° clockwise in the drawing as shown by arrow RD from the state of FIG. In this state, a part of the first notch 13a ₁ of the first valve body 13a is covered with the first shielding part 14a, but the remaining part is not covered with the first shielding part 14a. is open. A part of the second notch 13b ₁ of the second valve body 13b is covered with the second shielding part 14b, but the remaining part is not covered with the second shielding part 14b and is open. . That is, a part of both the first and second cutouts 13a ₁ and 13b ₁ is open. Therefore, in this state, a predetermined amount of fluid can flow between the first opening 11a and the second opening 11b, and the first opening 11a and the third opening 11c A predetermined amount of fluid can be circulated even between them.

Referring to FIG. 18C, this state is a state in which shaft body 12 is further rotated by about 90 ° in the clockwise direction in the drawing as shown by arrow RD from the state of FIG. 18B. In this state, the entire _first cutout 13a ₁ of the first valve body 13a is covered and closed by the first shielding portion 14a (fully closed), and the second cutout of the second valve body 13b. The entire 13b ₁ is not covered by the second shielding part 14b and is open (fully open). In this state, as shown in FIG. 10, the flow of the main fluid between the first opening 11a and the second opening 11b is blocked, and the first opening 11a and the third opening The fluid can flow to and from 11c.

By rotating the shaft body 12 in this manner, the first and second cutouts 13a ₁ and 13b ₁ can be opened and closed. Thereby, the opening degree of the flow path between the 1st opening part 11a and the 2nd opening part 11b, and the opening degree of the flow path between the 1st opening part 11a and the 3rd opening part 11c, Can be adjusted. For this reason, it is possible to simultaneously control the flow rate between the first opening 11a and the second opening 11b and the flow rate between the first opening 11a and the third opening 11c. Become.

  In the above embodiment, the configuration in which the two valve bodies 13a and 13b are connected to one shaft body 12 has been described. However, the present invention has a configuration in which one valve body is connected to one shaft body. It can also be applied. Hereinafter, a configuration in which one valve body is connected to one shaft body will be described with reference to FIGS. 19 and 20.

Referring to FIGS. 19 and 20, the valve device 1 is configured such that one shaft body 12 is provided with one valve body 13 as compared with the configuration of the valve device 1 shown in FIGS. 1 to 10. and that are, two openings 11a in the flow path 11A in the valve body 11, and that 11b is provided, a point notch 13a ₁ is a semi-circular valve body 13, the shield portion 14 is semi-circular It differs from the point which does not have a connection part.

The valve body 13 is connected to the other end side opposite to the one end to which the stepping motor 2 of the shaft body 12 is connected. The valve body 13 has a configuration in which a semicircular cutout 13a ₁ is provided in a disk shape. The valve body 13 is located between the first opening 11a and the second opening 11b. The valve body 13a is disposed on the upstream side of the flow A of the medium flowing in the flow path 11A with respect to the shielding portion 14a.

The shielding part 14 has a semicircular shape, and is disposed on the other end side of the shaft body 12 with respect to the valve body 13. The shielding portion 14 has an outer peripheral end surface 14 a ₁ and an inner peripheral end surface 14 a ₂ , the outer peripheral end surface 14 a ₁ is in contact with the wall surface of the flow path 11 A, and the inner peripheral end surface 14 a ₂ is the outer periphery of the shaft body 12. It is in contact with the surface. Thereby, the shielding part 14 supports the shaft body 12 in the radial direction of the shaft body 12 with respect to the flow path wall surface on the other end side of the shaft body 12.

The shielding part 14a has a gap forming convex part GP on the surface facing the valve body 13a. Gap forming projection GP is formed so as to protrude in a direction opposite to the valve body 13a along the inner peripheral surface 14a _2. Shielding portion 14a has a shape in which the third notch 14a ₃ into a disc shape around the axis C-C is formed. The shielding part 14a is configured such that the third notch 14a ₃ is positioned at the lowermost part of the shielding part 14a in a state where the valve device 1 is attached to the hot water supply device.

  In addition, since the structure of the valve apparatus 1 shown in FIG. 19 and FIG. 20 other than this is substantially the same as the structure of the valve apparatus 1 shown in FIGS. 1-10, the same code | symbol is attached | subjected about the same element and the description Do not repeat.

  Also in the valve device 1 shown in FIGS. 19 and 20, the valve body 13a is arranged on the upstream side of the flow A of the medium flowing in the flow path 11A with respect to the shielding portion 14a. For this reason, it can suppress that a medium leaks between the valve body 13a and the shielding part 14a by closely_contact | adhering the valve body 13a and the shielding part 14a with the medium which flows through the inside of the flow path 11A of the valve apparatus 1. FIG. . Therefore, the flow path 11A can be sufficiently sealed.

The shapes of the first and second notches 13a ₁ and 13b ₁ of the valve device 1 shown in FIGS. 1 to 10 and the shape of the notch 13a ₁ of the valve device 1 shown in FIGS. 19 and 20 are limited to those described above. Is not to be done. The shape of the first and second notches 13a ₁ and 13b ₁ of the valve device 1 shown above may be semicircular, and the shape of the notch 13a ₁ of the valve device 1 shown in FIGS. 19 and 20 is involute. The shape may be similar to the shape.

  Moreover, this invention can also be applied to the structure where the valve apparatus was used for the hot water supply apparatus with a memorial. Hereinafter, a configuration in which the valve device is used in a hot water supply device with a remnant will be described with reference to FIG.

  Referring to FIG. 21, a hot water supply device 100 with a remnant includes a valve device 1, a stepping motor 2, a hot water supply side heat exchanger 131a, a bath side heat exchanger 131b, a combustion burner 132, a blower 33, It mainly has a water supply pipe 35, a hot water supply pipe 36, a bypass circuit 37, pipes 38 to 44, a backflow prevention valve 50, a pump 60, check valves 80a and 80b, and a pouring solenoid valve 90. ing.

  The hot water supply side heat exchanger 131a is connected to a water supply pipe 35 for supplying water to the hot water supply side heat exchanger 131a and a hot water supply pipe 36 for discharging hot water from the hot water supply side heat exchanger 131a. A bypass circuit (bypass pipe) 37 connects the water supply pipe 35 and the hot water supply pipe 36. The valve device 1 of the present embodiment having the configuration shown in FIGS. 1 to 10 is connected to, for example, a connection portion between a water supply pipe 35 and a bypass circuit 37.

  A bath return pipe 43 is connected to the inlet side of the bath side heat exchanger 131b, and a bath outlet pipe 44 is connected to the outlet side of the bath side heat exchanger 131b. The pump 60 is mainly for circulating hot water between a bathtub (not shown) and the bath-side heat exchanger 131b, and is connected to the bath return pipe 43.

  Each of hot water supply side heat exchanger 131a and bath side heat exchanger 131b is for exchanging heat with the combustion gas generated in combustion burner 132. The blower 33 is for supplying air necessary for combustion to the combustion burner 132.

  The backflow prevention valve 50 is a safety device for cutting off the miscellaneous water and clean water in the bath. The backflow prevention valve 50 normally closes the overflow port due to the pressure difference between the pressure on the water supply source side (primary pressure) and the pressure on the supply destination side (secondary pressure). Is connected to the water supply pipe 35 through the pipe 38, and is connected to the tap water pipe 36 through the pipes 39, 40, the pouring electromagnetic valve 90, and the check valve 80a to introduce the secondary pressure. This pipe 40 is connected to a bath return pipe 43 through a check valve 80 b and a pipe 42. The hot water solenoid valve 90 is opened when the hot water is filled, and guides hot water from the hot water supply pipe 36 to the bath circuit via the pipe 42.

  Further, the backflow prevention valve 50 is opened when negative pressure is generated on the water supply source side due to water breakage or the like and discharges miscellaneous water from the overflow port to the outside of the hot water supply device 100, so the overflow port is connected to the hot water supply device 100 through the pipe 41. Connected to the drain.

  Referring mainly to FIGS. 2 and 21, the first opening 11 a of the valve device 1 is connected to the water supply side portion 35 a of the water supply pipe 35, and the third opening 11 c is a heat exchange of the water supply pipe 35. It is connected to the vessel side portion 35b. The second opening 11 b is connected to the bypass circuit 37. The fourth opening 11 d is connected to a pipe 38 that leads to a water pressure inlet for introducing the primary pressure of the check valve 50.

Next, the effect of this Embodiment is demonstrated.
In the configuration in which the first valve body 13a is disposed on the downstream side of the flow A of the medium flowing through the flow path 11A with respect to the first shielding part 14a, the first flow body 11A is moved by the medium flowing through the flow path 11A. A force is applied to the valve body 13a away from the first shielding portion 14a. For this reason, a medium may leak from between the 1st valve body 13a and the 1st shielding part 14a.

  In this case, in the configuration in which the second opening 11b is connected to the bypass circuit 22 and the third opening 11c is connected to the heat exchanger side portion 31b of the water supply pipe 31, the bypass circuit 22 is connected to the first valve. Even if the body 13a and the first shielding portion 14a try to be fully closed, the medium leaks. Therefore, excess water flows through the bypass circuit 22. This lowers the hot water supply temperature. Therefore, it is necessary to increase the temperature of the heat exchanger 21 by the amount corresponding to the decrease in the hot water supply temperature. As a result, energy efficiency is reduced.

  On the other hand, according to the valve device 1 of the present embodiment, as shown in FIG. 2, the first valve body 13 a has a medium flow A flowing inside the flow path 11 </ b> A with respect to the first shielding portion 14 a. Arranged upstream. For this reason, the first valve body 13a is pressed against the first shielding part 14a by the medium flowing inside the flow path 11A. Therefore, the 1st valve body 13a and the 1st shielding part 14a can be stuck. Thereby, it can suppress that a medium leaks from between the 1st valve body 13a and the 1st shielding part 14a. Therefore, the flow path 11A can be sufficiently sealed.

  Thereby, the fall of the hot water supply temperature by extra water flowing into the bypass circuit 22 can be suppressed. Therefore, it is not necessary to raise the temperature of the heat exchanger 21 by the amount corresponding to the decrease in the hot water supply temperature. For this reason, the temperature of the heat exchanger 21 can be lowered. Therefore, it is not necessary to fully open the combustion burner 23. Further, the energy efficiency is good when the total number of the combustion burners 23 is slightly fueled. Therefore, energy efficiency can be improved in the valve device 1 of the present embodiment.

In the valve device 1 of the present embodiment, the first and second notches 13a ₁ and 13b ₁ can be opened and closed by the rotation of the first and second valve bodies 13a and 13b, and the first opening 11a. The opening of the channel 11A between the first opening 11b and the opening of the channel 11A between the first opening 11a and the third opening 11c can be adjusted simultaneously. . For this reason, the flow volume between the 1st opening part 11a and the 2nd opening part 11b and the flow volume between the 1st opening part 11a and the 3rd opening part 11c can be controlled simultaneously.

  Further, it is not necessary to move the first and second valve bodies 13a and 13b in the direction of the axis CC along with the shaft body 12 in order to adjust the opening degree. Therefore, it is not necessary to thread the shaft body 12, and the shaft body 12 can be made thin, so that a drive source (for example, a motor) for rotating the shaft body 12 can be reduced in size. Therefore, it is possible to adjust the distribution ratio or the mixing ratio with a small and simple configuration.

  In the valve device 1 of the present embodiment, the spacer 14 having the first and second shielding portions 14a and 14b is provided separately from the valve body 11 and is fixed to the wall surface of the flow path 11A of the valve body 11. ing. Thereby, it is possible to prevent the spacer 14 from rotating together with the shaft body 12 when the shaft body 12 rotates.

  In the valve device 1 according to the present embodiment, the valve device 1 is a gap-forming convex portion GP provided on at least one part of the mutually opposing surfaces of the first valve body 13a and the first shielding portion 14a. Is further provided. Thereby, the area by which the foreign material is pinched | interposed in the mutually opposing surface of the 1st valve body 13a and the 1st shielding part 14a by the convex part GP for gap formation can be made small. For this reason, it can suppress that a foreign material is pinched.

  In the valve device 1 according to the present embodiment, the flow path 11A has a fourth opening 11d between the second opening 11b and the third opening 11c. Thereby, the water pressure inlet of the check valve 50 can be connected to the fourth opening 11d, and a stable water pressure can be applied from the fourth opening 11d.

  By using the valve device 1 of the present embodiment in the hot water supply device 20 of the present embodiment, the valve opening degree can be adjusted by the rotation of the shaft body 12 provided with the valve body, and the rotation of the shaft body 12 It is possible to obtain a hot water supply device 20 that can regulate the temperature. And the hot-water supply apparatus which can fully seal a flow path can be obtained.

The hot water supply apparatus of the present embodiment is configured such that the third notch 14a ₃ is positioned at the lowermost part of the first shielding part 14a in a state where the valve device 1 is attached to the hot water supply apparatus 20. As a result, the medium can be discharged from the third notch 14a ₃ positioned at the lowermost portion of the first shielding portion 14a. Therefore, the drainage of the valve device 1 can be improved. For this reason, freezing of residual water can be made difficult to occur.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be advantageously applied to a valve device that controls opening and closing by connecting one end of a valve body having a notch to a shaft body and rotating the valve body, and a hot water supply device including the valve device.

DESCRIPTION OF SYMBOLS 1 Valve apparatus, 2 Stepping motor, 3 Servo mounting plate, 11 Valve main body, 11A Flow path, 11a 1st opening part, 11b 2nd opening part, 11c 3rd opening part, 11d 4th opening part, 11e Groove, 12 shaft body, 13 valve body, 13a first valve body, 13b second valve body, 13a ₁ first notch, 13b ₁ second notch, 13a ₂ , 13b ₂ arc portion, 14 spacer (shielding) Part), 14a first shielding part, 14b second shielding part, 14a ₁ , 14b ₁ outer peripheral end face, 14a ₂ , 14b ₂ inner peripheral end face, 14a ₃ , 14b ₃ third notch, 14c connecting part, 14d convex Engagement portion, 14e through hole, 15 valve collar, 16a, 16b O-ring, 20 hot water supply device, 21 heat exchanger, 22 bypass circuit, 23 combustion burner, 24 blower, 31 water supply piping, 31b heat exchanger side portion, 31a Water supply side part, 32 Hot water piping, 33 Blower, 35 Water supply piping, 35a Water supply side portion, 35b Heat exchanger side portion, 36 Hot water piping, 37 Bypass circuit, 38-42 piping, 43 Bath return piping, 44 Bath outlet piping, 50 Backflow prevention valve, 60 Pump, 80a, 80b Check valve, 90 Pouring solenoid valve, 100 Hot water supply device, 131a Hot water supply side heat exchanger, 131b Bath side heat exchanger, 132 Combustion burner, GP Gap forming convex part.

Claims (7)

A valve body having a first opening and a second opening, and including a flow path for flowing a medium therein;
A shaft body arranged in the flow path of the valve body and configured to be rotatable about an axis; and
A first notch is formed in a disk shape centered on the axis and connected to the shaft so as to be positioned between the first opening and the second opening in the flow path. A first valve body having a different shape;
A first shielding part disposed in the flow path so as to be able to open and close the first notch of the first valve body by rotation about the axis of the first valve body,
The valve device, wherein the first valve body is disposed on the upstream side of the flow of the medium flowing through the inside of the flow path with respect to the first shielding portion. The flow path has a third opening that sandwiches the first opening with the second opening,
A second notch is formed in a disk shape that is connected to the shaft body so as to be positioned between the first opening and the third opening in the flow path, and that is centered on the axis. A second valve body having a different shape;
A second shielding part disposed in the flow path so as to be able to open and close the second notch of the second valve body by rotation about the axis of the second valve body; The valve device according to claim 1.   The valve device according to claim 2, wherein a spacer having the first and second shielding portions is provided separately from the valve body and is fixed to a wall surface of the flow path of the valve body.   The clearance formation convex part further provided in the at least any one part of the mutually opposing surface of a said 1st valve body and a said 1st shielding part is provided in any one of Claims 1-3. Valve device.   4. The valve device according to claim 2, wherein the flow path has a fourth opening between the second opening and the third opening. 5. The valve device according to any one of claims 1 to 5,
A heat exchanger connected to one of the second and third openings of the valve device;
A hot water supply apparatus comprising a bypass circuit connected to one of the second and third openings of the valve device.   The first shielding portion has a shape in which a third notch is formed in a disk shape centered on the axis, and the third notch is in a state where the valve device is attached to the hot water supply device. The hot water supply device according to claim 6, wherein the hot water supply device is configured to be positioned at a lowermost portion of the first shielding portion.

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