JP6880969B2 - Flow control device and hot water device - Google Patents

Description

The present invention relates to a flow rate adjusting device and a water heating device using the same.

As a conventional flow rate adjusting device, for example, a valve device described in Japanese Patent Application Laid-Open No. 2016-23906 (Patent Document 1) is known. The valve device described in Patent Document 1 includes a valve housing, a valve shaft, a motor, and a valve body.

The valve housing has a hot water supply passage, a hot water outlet passage, and a hot water filling passage. The hot water outlet and the hot water supply passage are branched from the hot water supply passage inside the valve housing. The valve housing has a valve seat provided inside the hot water supply channel. The valve body is attached to the valve shaft so as to face the valve seat. The valve shaft is attached to the motor. The motor moves the valve shaft. As a result, the distance between the valve seat and the valve body changes, and the flow rate of hot water flowing from the hot water supply passage to the hot water outlet and the hot water filling passage is adjusted.

Japanese Unexamined Patent Publication No. 2016-23906

In the flow rate adjusting device, a high coaxiality is required for the valve shaft. When the valve shaft is made of a metal material, the valve shaft can be formed by cutting. Cutting is easy to achieve high dimensional accuracy. Therefore, it is possible to satisfy the requirement of high coaxiality in the valve shaft made of a metal material.

However, when the valve shaft is made of resin, the valve shaft is formed by pouring the resin into the mold. With the method of pouring resin into a mold, it is difficult to obtain high dimensional accuracy as compared with cutting. Therefore, when the valve shaft is made of resin, it is difficult to satisfy the requirement of high coaxiality.

The present invention has been made in view of the above-mentioned problems of the prior art. More specifically, the present invention provides a flow rate adjusting device and a water heating device capable of improving the coaxiality of a resin valve shaft.

The flow rate adjusting device according to one aspect of the present invention includes a main body portion having a water inlet flow path, a collar portion arranged inside the main body portion and provided with a first through hole along the extending direction of the water inlet flow path, and a first. 1 A resin valve shaft that is movably inserted into the first through hole along the extending direction of the through hole and has a sliding portion that slides on the inner peripheral surface of the first through hole, and a valve shaft. It includes a filling member to be attached. The sliding portion is sandwiched between the first large diameter portion, the second large diameter portion, the first large diameter portion and the second large diameter portion, and has an outer diameter larger than that of the first large diameter portion and the second large diameter portion. Includes a first small diameter portion with a small diameter. The filling member is mounted on the outer peripheral surface of the valve shaft located in the first small diameter portion. At least a part of the filling member is located outside the collar portion when the valve shaft approaches the water inlet side.

According to the flow rate adjusting device according to one aspect of the present invention, the coaxiality of the resin valve shaft can be improved. Further, according to the flow rate adjusting device according to one aspect of the present invention, it is possible to suppress water flow noise, erosion of piping and the like.

In the above flow rate adjusting device, the filling member may be more flexible than the valve shaft. In the above flow rate adjusting device, the material constituting the filling member may be rubber. In these cases, the filling member can be easily attached to the valve shaft.

In the above flow rate adjusting device, the outer diameter of the filling member may be 0.99 times or more and 1.01 times or less the outer diameter of the first large diameter portion and the second large diameter portion. In this case, it is possible to suppress the noise of water flow and the erosion of piping and the like, and at the same time, prevent the filling member from obstructing the sliding of the valve shaft and the inner peripheral surface of the first through hole.

In the above flow rate adjusting device, the outer peripheral surface of the filling member may be flush with the outer peripheral surface of the valve shaft located in the first large diameter portion and the second large diameter portion. In this case, it is possible to suppress the noise of water flow and the erosion of piping and the like, and at the same time, prevent the filling member from obstructing the sliding of the valve shaft and the inner peripheral surface of the first through hole.

The water heating device according to one aspect of the present invention includes the above-mentioned flow rate adjusting device, a hot water supply flow path, and a hot water pouring flow path. The main body of the flow rate adjusting device is a first outlet that branches from the water inlet and is connected to the hot water supply channel, and a second outlet that branches from the water inlet and is connected to the hot water injection path. It also has a water channel.

According to the flow rate adjusting device according to one aspect of the present invention, it is possible to improve the coaxiality of the resin valve shaft. Further, according to the flow rate adjusting device according to one aspect of the present invention, it is possible to suppress water flow noise, erosion of piping and the like.

It is sectional drawing of the flow rate adjusting apparatus which concerns on embodiment. It is an enlarged plan view of the water inlet flow path in the flow rate adjusting apparatus which concerns on embodiment seen from the direction II of FIG. It is an enlarged view of the region III of FIG. It is a partially enlarged sectional view of the valve shaft 3 in the flow rate adjusting apparatus which concerns on modification 1 of embodiment. It is a partially enlarged sectional view of the valve shaft 3 in the flow rate adjusting apparatus which concerns on modification 2 of embodiment. It is sectional drawing of the flow rate adjusting apparatus which concerns on embodiment when a valve shaft 3 advances. It is an enlarged view of the region VII of FIG. It is sectional drawing which shows the manufacturing method of the valve shaft of the flow rate adjusting apparatus which concerns on embodiment. It is a schematic diagram of the hot water apparatus which concerns on embodiment.

(Configuration of flow rate adjusting device according to the embodiment)
Hereinafter, the configuration of the flow rate adjusting device according to the embodiment will be described with reference to FIGS. 1 to 7. The same or corresponding parts in each figure are designated by the same reference numerals. In addition, at least a part of the embodiments described below may be arbitrarily combined. Furthermore, the dimensional relationships such as length, width, thickness, and depth are appropriately changed for the purpose of clarifying the drawings, and do not represent the actual dimensional relationships.

As shown in FIG. 1, the flow rate adjusting device according to the embodiment includes a main body portion 1, a collar portion 2, a valve shaft 3, a drive unit 4, and a valve body 5. The flow rate adjusting device according to the embodiment further includes a filling member 34. The main body 1 has an inflow flow path 11, a first outflow flow path 12, and a second outflow flow path 13.

The water inlet flow path 11, the first water discharge flow path 12, and the second water discharge flow path 13 are provided inside the main body 1. The first outflow flow path 12 and the second outflow flow path 13 are branched from the inflow flow path 11 inside the main body 1. The water inlet flow path 11 is a flow path through which hot water flowing into the flow rate adjusting device according to the embodiment flows. The first outflow flow path 12 and the second outflow flow path 13 are flow paths through which hot water flowing out from the flow rate adjusting device according to the embodiment flows.

The main body 1 further has a guide portion 14. The guide portion 14 is provided inside the water inlet flow path 11. As shown in FIG. 2, the guide portion 14 has a guide main body 14a, a second through hole 14b, and a rib 14c.

The guide main body 14a is arranged inside the water inlet flow path 11. The guide body 14a has, for example, a cylindrical shape. From another point of view, the guide body 14a is provided with a second through hole 14b. The second through hole 14b is provided along the extending direction of the water inlet flow path 11. A valve shaft 3 is inserted into the second through hole 14b. That is, the valve shaft 3 is guided by the second through hole 14b.

The guide main body 14a is arranged inside the water inlet flow path 11 by the rib 14c. The rib 14c connects the inner peripheral surface of the water inlet flow path 11 and the outer peripheral surface of the guide main body 14a. The rib 14c extends from the inner peripheral surface of the water inlet channel 11 toward the center of the water inlet 11.

The main body 1 further has a valve seat 15. The valve seat 15 is provided on the inner peripheral surface of the water inlet flow path 11. The valve seat 15 is arranged at a position facing the valve body 5. More specifically, the valve seat 15 extends in the direction from the inner peripheral surface of the water entry flow path 11 toward the center of the water entry flow path 11. The valve seat 15 is arranged on the downstream side of the guide portion 14 in the water flow direction.

The collar portion 2 is arranged inside the main body portion 1. The collar portion 2 has a first end 2a and a second end 2b. The collar portion 2 is arranged so that the first end 2a faces the water inlet flow path 11 side. The second end 2b is the opposite end of the first end 2a. That is, the collar portion 2 is arranged so that the second end 2b faces the drive portion 4 side. The direction from the first end 2a to the second end 2b is along the extending direction of the water inlet flow path 11.

The collar portion 2 is provided with a first through hole 21. The first through hole 21 extends from the first end 2a toward the second end 2b and penetrates the collar portion 2. From another point of view, the first through hole 21 is provided along the extending direction of the water inlet flow path 11. A screw thread 22 is formed on the inner peripheral surface of the first through hole 21. The portion of the first through hole 21 in which the screw thread 22 is formed is located on the second end 2b side.

The valve shaft 3 is made of resin. The resin used for the valve shaft 3 is, for example, PPS (polyphenylene sulfide) or the like. The valve shaft 3 has a first end 3a and a second end 3b. The second end 3b is the opposite end of the first end 3a. In the following, the direction from the first end 3a to the second end 3b may be referred to as the central axis direction of the valve shaft 3.

The valve shaft 3 is inserted into the first through hole 21. The valve shaft 3 is inserted into the second through hole 14b. The valve shaft 3 is inserted into the first through hole 21 and the second through hole 14b so that the first end 3a faces the water entry flow path 11 side. The valve shaft 3 is attached to the drive unit 4 at the second end 3b. A screw thread 30 is formed on the outer peripheral surface of the valve shaft 3 on the second end 3b side. The screw thread 30 is screwed with the screw thread 22.

The valve shaft 3 has a sliding portion 3c. The sliding portion 3c is a portion of the valve shaft 3 that slides on the inner peripheral surface of the first through hole 21. As shown in FIG. 3, the sliding portion 3c has a large diameter portion 31a (first large diameter portion), a large diameter portion 31b (second large diameter portion), and a small diameter portion 32a. The small diameter portion 32a is sandwiched between the large diameter portion 31a and the large diameter portion 31b in the central axis direction. That is, the small diameter portion 32a is arranged between the large diameter portion 31a and the large diameter portion 31b in the central axis direction.

The valve shaft 3 has an outer diameter D1 in the large diameter portion 31a and the large diameter portion 31b. The valve shaft 3 has an outer diameter D2 in the small diameter portion 32a. The outer diameter D1 is larger than the outer diameter D2.

The valve shaft 3 may further have a tapered portion 33a and a tapered portion 33b. The tapered portion 33a is arranged between the large diameter portion 31a and the small diameter portion 32a. The tapered portion 33a is arranged between the large diameter portion 31b and the small diameter portion 32a. As shown in FIG. 4, only the tapered portion 33a is provided, and the tapered portion 33b may not be provided. That is, the large diameter portion 31b and the small diameter portion 32a may be arranged in contact with each other. Although not shown, only the tapered portion 33b may be provided and the tapered portion 33a may not be provided. That is, the large diameter portion 31a may be arranged in contact with the small diameter portion 32a, and the tapered portion 33b may be arranged between the small diameter portion 32a and the large diameter portion 31b.

The outer diameter of the valve shaft 3 in the tapered portion 33a increases from the small diameter portion 32a side toward the large diameter portion 31a side. The outer diameter of the valve shaft 3 in the tapered portion 33a located at the end on the small diameter portion 32a side is equal to the outer diameter D2. The outer diameter of the valve shaft 3 in the tapered portion 33a located at the end on the large diameter portion 31a side is equal to the outer diameter D1. The outer diameter of the valve shaft 3 in the tapered portion 33b increases from the small diameter portion 32a side toward the large diameter portion 31b side. The outer diameter of the valve shaft 3 in the tapered portion 33b located at the end on the small diameter portion 32a side is equal to the outer diameter D2. The outer diameter of the valve shaft 3 in the tapered portion 33b located at the end on the large diameter portion 31b side is equal to the outer diameter D1.

As shown in FIG. 5, the sliding portion 3c may further have a large diameter portion 31c (third large diameter portion) and a small diameter portion 32b (second small diameter portion). That is, the number of small diameter portions of the valve shaft 3 may be plural.

As shown in FIG. 1, the valve shaft 3 is provided with an O-ring groove 3d. A plurality of O-ring grooves 3d may be arranged. An O-ring 3e is arranged in the O-ring groove 3d. The O-ring 3e ensures watertightness between the valve shaft 3 and the inner peripheral surface of the first through hole 21. The sliding portion 3c does not include the O-ring groove 3d.

The drive unit 4 moves the valve shaft 3 along the central axis direction. The drive unit 4 is, for example, a stepping motor or the like. More specifically, the drive unit 4 rotates the valve shaft 3 around the central axis of the valve shaft 3. As described above, the first through hole 21 has a screw thread 22, and the valve shaft 3 has a screw thread 30 to be screwed with the screw thread 22. Therefore, when the drive unit 4 rotates the valve shaft 3 around the central axis, the valve shaft 3 moves along the central axis.

In the following, moving the valve shaft 3 in the direction in which the exposure from the first end 2a side of the collar portion 2 increases is referred to as forward movement, and the exposure from the first end 2a side of the collar portion 2 decreases. Moving the valve shaft 3 in the direction may be referred to as retreating.

As described above, the valve shaft 3 has a sliding portion 3c that slides on the inner peripheral surface of the first through hole 21. Therefore, the movement of the valve shaft 3 along the central axis direction is guided by the first through hole 21.

The valve body 5 is attached to the valve shaft 3. Specifically, the valve body 5 has a hole. The valve body 5 is attached to the valve shaft 3 by inserting the valve shaft 3 into the hole. The valve body 5 is attached to the valve shaft 3 so as to face the valve seat 15. The valve body 5 is attached so that the drive unit 4 advances the valve shaft 3 to narrow the flow path between the valve body 5 and the valve seat 15.

In a state where the flow path between the valve body 5 and the valve seat 15 is narrowed, hot water is substantially discharged from the side of the water inlet flow path 11 to the side of the first water flow path 12 and the second water discharge flow path 13. There is no water flow. In the following, the flow path between the valve body 5 and the valve seat 15 is narrowed, and hot water substantially flows from the side of the water inlet flow path 11 to the side of the first water discharge flow path 12 and the second water discharge flow path 13. The state in which it is not closed is sometimes called the closed state.

As the valve shaft 3 is retracted from the closed state, the distance between the valve body 5 and the valve seat 15 increases. As the distance between the valve body 5 and the valve seat 15 increases, the flow rate of hot water flowing from the water inlet channel 11 side to the first outlet channel 12 and the second outlet channel 13 increases.

As described above, in the flow rate adjusting device according to the embodiment, the drive unit 4 adjusts the position of the valve body 5 attached to the valve shaft 3 to change the distance between the valve body 5 and the valve seat 15. The flow rate of hot water flowing from the side of the inflow flow path 11 to the side of the first outflow flow path 12 and the second outflow flow path 13 is adjusted.

The filling member 34 is attached to the valve shaft 3. The filling member 34 is arranged on the outer peripheral surface of the valve shaft 3 located between the large diameter portion 31a and the large diameter portion 31b. More specifically, the filling member 34 is arranged on the outer peripheral surface of the valve shaft 3 located in the small diameter portion 32a. When the sliding portion 3c has the tapered portion 33a and the tapered portion 33b, the filling member 34 is also arranged on the outer peripheral surface of the valve shaft 3 located at the tapered portion 33a and the tapered portion 33b. When the sliding portion 3c further has a large diameter portion 31c and a small diameter portion 32b, the filling member 34 is the outer circumference of the valve shaft 3 located between the large diameter portion 31b and the large diameter portion 31c. It is also arranged on the surface (that is, the filling member 34 is also arranged on the outer peripheral surface of the valve shaft 3 located in the small diameter portion 32b).

The filling member 34 is preferably more flexible than the valve shaft 3. From another point of view, it is preferable that the filling member 34 is made of a material having a lower elastic modulus than the resin constituting the valve shaft 3. The material constituting the filling member 34 is preferably rubber.

The filling member 34 has an outer diameter D3. The outer diameter D3 is larger than the outer diameter D2. The outer diameter D3 is preferably 0.99 times or more and 1.01 times or less the outer diameter D1. It is more preferable that the outer diameter D3 coincides with the outer diameter D1. That is, it is more preferable that the outer peripheral surface of the filling member 34 is flush with the outer peripheral surface of the valve shaft 3 located in the large diameter portion 31a and the large diameter portion 31b.

As shown in FIGS. 6 and 7, at least a part of the filling member 34 is located outside the collar portion 2 when the valve shaft 3 advances. That is, at least a part of the filling member 34 is exposed from the first end 2a of the collar portion 2 when the valve shaft 3 advances.

Although not shown, the filling member 34 may be provided with a notch. This notch is provided, for example, along the radial direction of the filling member 34. The filling member 34 is attached to the valve shaft 3 by, for example, pushing open the notch and passing the valve shaft 3 through the notch through the filling member 34. Further, the filling member 34 can also be formed by baking.

Hereinafter, a method of manufacturing the valve shaft 3 of the flow rate adjusting device according to the embodiment will be described with reference to FIG. The valve shaft 3 is formed by pouring the resin constituting the valve shaft 3 into the mold 6 and curing the valve shaft 3. The inner wall surface of the mold 6 is shaped according to the shape of the valve shaft 3.

The mold 6 is divided into a plurality of parts. Each of the divided mold 6 portions can be adjusted in position with each other. For example, as shown in FIG. 8, the mold 6 has a first portion for forming a portion of the valve shaft 3 including a large diameter portion 31a, a large diameter portion 31b, a small diameter portion 32a, a tapered portion 33a, and a tapered portion 33b. It is divided into 6a, a second portion 6b and a third portion 6c.

The first portion 6a is a portion for forming the large diameter portion 31a and the tapered portion 33a. The second portion 6b is a portion for forming the small diameter portion 32a. The third portion 6c is a portion for forming the large diameter portion 31b and the tapered portion 33b.

The effect of the flow rate adjusting device according to the embodiment will be described below. When the valve shaft 3 does not have the large diameter portion 31a, the large diameter portion 31b, and the small diameter portion 32a, the portion of the valve shaft 3 having the same outer diameter becomes longer in the central axis direction. The valve shaft 3 may be warped due to the residual stress acting on the outer peripheral surface side of the valve shaft 3 when the valve shaft 3 is molded. This warp increases as the portion of the valve shaft 3 having the same outer diameter becomes longer. As a result, when the valve shaft 3 does not have the large diameter portion 31a, the large diameter portion 31b, and the small diameter portion 32a, it is difficult to obtain the required coaxiality.

On the other hand, when the valve shaft 3 has a large diameter portion 31a, a large diameter portion 31b, and a small diameter portion 32a, the outer diameter of the valve shaft 3 is small in the small diameter portion 32a, so that the valve shaft 3 is molded. At this time, the residual stress acting on the outer peripheral surface side of the valve shaft 3 is easily released in the small diameter portion 32a. That is, the residual stress acting on the outer peripheral surface side of the large diameter portion 31a is difficult to propagate to the large diameter portion 31b. As a result, even if the valve shaft 3 is made of resin, the valve shaft 3 is less likely to warp.

Whether or not the coaxiality of the valve shaft 3 satisfies the required numerical value is determined by measuring the coaxiality at the measurement point on the outer peripheral surface of the valve shaft 3. As a result of this measurement, if the coaxiality required at the measurement point is not satisfied, the mold corresponding to the portion of the valve shaft 3 including the measurement point is modified.

In the valve shaft 3 of the flow rate adjusting device according to the embodiment, a small diameter portion 32a having an outer diameter smaller than that of the large diameter portion 31a and the large diameter portion 31b is arranged between the large diameter portion 31a and the large diameter portion 31b. Therefore, even if the mold is adjusted for one of the large diameter portion 31a and the large diameter portion 31b, the influence is unlikely to be exerted on the other of the large diameter portion 31a and the large diameter portion 31b. That is, in the valve shaft 3 of the flow rate adjusting device according to the embodiment, it is easy to independently adjust the coaxiality in the large diameter portion 31a and the coaxiality in the large diameter portion 31b.

As described above, even if the valve shaft 3 of the flow rate adjusting device according to the embodiment is made of resin, warpage is unlikely to occur and the coaxiality can be easily adjusted, so that the coaxiality can be improved. As a result, according to the flow rate adjusting device according to the embodiment, the valve shaft 3 can be more reliably guided by the first through hole 21.

When the filling member 34 is not attached to the valve shaft 3, a space exists between the outer peripheral surface of the valve shaft 3 located in the small diameter portion 32a and the inner peripheral surface of the first through hole 21. When the valve shaft 3 advances and the space is connected to the outside of the collar portion 2, hot water from the water inlet flow path 11 may flow into the space.

The pressure of hot water flowing through the space is relatively lower than that of hot water flowing around the space. Therefore, bubbles are generated in the hot water passing through the space. When the bubbles are mixed with the hot water flowing through the first water flow path 12 and the second water flow path 13, the bubbles are generated by the relatively high pressure of the hot water flowing through the first water flow path 12 and the second water flow path 13. , Compressed and disappears. The disappearance of these bubbles is accompanied by an impact. Therefore, this bubble causes the sound of water flow. Further, when the bubbles disappear in the vicinity of the wall surface of the pipe, it causes erosion on the wall surface of the pipe.

On the other hand, when the filling member 34 is attached to the valve shaft 3, the space between the outer peripheral surface of the valve shaft 3 located in the small diameter portion 32a and the inner peripheral surface of the first through hole 21 is reduced. Therefore, it becomes difficult for hot water from the water inlet channel 11 to flow into the space. Therefore, according to the flow rate adjusting device according to the embodiment, it is possible to suppress the sound of water flow and the erosion of the pipe.

When the valve shaft 3 further has a tapered portion 33a and a tapered portion 33b in the flow rate adjusting device according to the embodiment, the outer diameter suddenly changes between the large diameter portion 31a and the large diameter portion 31b and the small diameter portion 32a. do not. Therefore, in this case, when the mold is adjusted to improve the coaxiality of the valve shaft 3, it is difficult for a step to be formed on the outer peripheral surface of the valve shaft 3.

In the flow rate adjusting device according to the embodiment, when the valve shaft 3 has only one of the tapered portion 33a and the tapered portion 33b, the number of molds for molding the valve shaft 3 can be reduced. Therefore, in this case, it is possible to reduce the manufacturing cost of the valve shaft 3.

In the flow rate adjusting device according to the embodiment, when the valve shaft 3 further has a large diameter portion 31c and a small diameter portion 32b, the coaxial adjustment of the valve shaft 3 can be performed more finely.

In the flow rate adjusting device according to the embodiment, when the filling member 34 is made of a material having a higher flexibility than the resin constituting the valve shaft 3 such as rubber, the valve shaft can be easily deformed by deforming the filling member 34. Can be attached to 3. Further, in this case, even if the outer diameter D3 is larger than the outer diameter D1, the filling member 34 is relatively easily deformed by the contact with the inner peripheral surface of the first through hole 21, and the filling member 34 is the valve shaft. It does not easily interfere with the sliding of 3 and the first through hole 21.

In the flow rate adjusting device according to the embodiment, when the outer diameter D3 is 0.99 times or more the outer diameter D1, the space between the outer peripheral surface of the filling member 34 and the inner peripheral surface of the first through hole 21 becomes smaller. Therefore, it is possible to suppress the flow of hot water from the water inlet channel 11 to the space. When the outer diameter D3 is 1.01 times or less the outer diameter D1, the difference between the outer diameter D3 and the outer diameter D1 is caused by the deformation of the filling member 34 due to the contact with the inner peripheral surface of the first through hole 21. Can be absorbed. Therefore, in this case, it is possible to suppress the filling member 34 from hindering the sliding of the valve shaft 3 and the inner peripheral surface of the first through hole 21 while suppressing the sound of water flow and the erosion of the piping and the like.

In the flow rate adjusting device according to the embodiment, when the outer peripheral surface of the filling member 34 and the outer peripheral surface of the valve shaft 3 located in the large diameter portion 31a and the large diameter portion 31b are flush with each other, water flow noise, piping, etc. It is possible to prevent the filling member 34 from hindering the sliding of the valve shaft 3 and the inner peripheral surface of the first through hole 21 while suppressing the erosion of the valve shaft 3.

(Structure of hot water device according to embodiment)
Hereinafter, the configuration of the water heating device 100 according to the embodiment will be described with reference to FIG. As shown in FIG. 9, the water heating device 100 according to the embodiment includes a flow rate adjusting device 7, a hot water supply flow path 8, and a hot water pouring flow path 9.

The flow rate adjusting device 7 is a flow rate adjusting device according to the above embodiment. The hot water supply flow path 8 is a flow path for supplying heated clean water to the curan or the like. The pouring flow path 9 is a flow path for supplying heated clean water to the bathtub 10.

The hot water supply flow path 8 includes a pipe 81, a pipe 82, a pipe 83, and a heat exchanger 84. A water supply is connected to one end of the pipe 81. One end of the heat exchanger 84 is connected to the other end of the pipe 81. One end of the pipe 82 is connected to the other end of the heat exchanger 84. The water inlet flow path 11 of the flow rate adjusting device 7 is connected to the other end of the pipe 82. The first outflow flow path 12 of the flow rate adjusting device 7 is connected to one end of the pipe 83.

A burner 85 is arranged in the vicinity of the heat exchanger 84. The heat exchanger 84 heats the clean water supplied from the pipe 81 by heat exchange with the combustion gas emitted from the burner 85. The heated clean water flowing through the pipe 82 is supplied to the faucet or the like connected to the other end of the pipe 83 via the flow rate adjusting device 7 and the pipe 83.

The pouring flow path 9 includes a pipe 91, a pipe 92, and a pouring solenoid valve 93. The second water discharge flow path 13 of the flow rate adjusting device 7 is connected to one end of the pipe 91. One end of the pouring solenoid valve 93 is connected to the other end of the pipe 91. The other end of the pouring solenoid valve 93 is connected to one end of the pipe 92. A bathtub 10 is connected to the other end of the pipe 92. The heated clean water flowing through the pipe 82 is supplied to the bathtub 10 via the flow rate adjusting device 7, the pipe 91, the pipe 92, and the hot water pouring solenoid valve 93.

The embodiments disclosed this time should be considered as exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims rather than the above-described embodiment, and is intended to include the meaning equivalent to the scope of claims and all modifications within the scope.

1 Main body, 11 Inflow flow path, 12 1st outflow flow path, 13 2nd outflow flow path, 14 guide part, 14a guide main body, 14b 2nd through hole, 14c rib, 15 valve seat, 2 collar part, 2a first 1 end, 2b 2nd end, 21 1st through hole, 22 threads, 3 valve shaft, 3a 1st end, 3b 2nd end, 3c sliding part, 3d O-ring groove, 3e O-ring, 30 threads, 31a, 31b, 31c Large diameter part, 32a, 32b Small diameter part, 33a, 33b Tapered part, 34 Filling member, 4 Drive part, 5 Valve body, 6 Mold, 6a 1st part, 6b 2nd part, 6c 3rd part Part, 7 Flow control device, 8 Hot water supply flow path, 81, 82, 83 piping, 84 heat exchanger, 85 burner, 9 Pouring flow path, 91, 92 piping, 93 Hot water pouring solenoid valve, 10 bathtub, 100 hot water device , D1, D2, D3 outer diameter.

Claims (6)

The main body having a water inlet and
A collar portion arranged inside the main body portion and provided with a first through hole along the extending direction of the water inlet flow path, and a collar portion.
A resin valve shaft having a sliding portion that is movably inserted into the first through hole and slides on the inner peripheral surface of the first through hole so as to be movable along the extending direction of the first through hole.
It is provided with a filling member attached to the valve shaft.
The sliding portion is sandwiched between the first large diameter portion, the second large diameter portion, the first large diameter portion, and the second large diameter portion, and the first large diameter portion and the second large diameter portion. Including the first small diameter part whose outer diameter is smaller than the part
The filling member is mounted on the outer peripheral surface of the valve shaft located in the first small diameter portion.
A flow rate adjusting device in which at least a part of the filling member is located outside the collar portion when the valve shaft approaches the water inlet flow path side. The flow rate adjusting device according to claim 1, wherein the filling member is more flexible than the valve shaft. The flow rate adjusting device according to claim 2, wherein the material constituting the filling member is rubber. The flow rate adjusting device according to claim 1, wherein the outer diameter of the filling member is 0.99 times or more and 1.01 times or less the outer diameters of the first large diameter portion and the second large diameter portion. The flow rate adjusting device according to claim 1, wherein the outer peripheral surface of the filling member is flush with the outer peripheral surface of the valve shaft located in the first large diameter portion and the second large diameter portion. The flow rate adjusting device according to any one of claims 1 to 5, and the flow rate adjusting device.
Hot water supply flow path and
Equipped with a pouring flow path
The main body has a first outlet that branches from the water inlet and is connected to the hot water supply channel , and a second outlet that branches from the water inlet and is connected to the hot water injection channel. A water heater that further has a water channel.

Images