JP6959569B2 - Bathtub circulation type water spouting device - Google Patents

Description

The present invention relates to a bathtub circulation type water discharge device, and more particularly to a bathtub circulation type water discharge device that takes in hot water in a bathtub and discharges the taken-in hot water into the bathtub from above the water surface of the bathtub.

Japanese Unexamined Patent Publication No. 2016-7360 (Patent Document 1) describes a water discharge device and a bathtub device. This water discharge device is a bathtub circulation type in which hot water (water or hot water) in the bathtub is pumped by a water supply pump and the pumped hot water is discharged into the bathtub from a wide water discharge hole arranged adjacent to the upper edge of the bathtub. It is a water discharge device. The hot water discharged from this wide spout hole hits the user immersed in the bathtub and flows into the bathtub, so that a comfortable massage effect can be given to the shoulders and nape of the user.

Japanese Unexamined Patent Publication No. 2016-7360

In order to give a comfortable massage effect to the user by the hot water discharged from the spout hole, it is necessary to discharge the hot water toward the user at a large flow rate. A large-capacity water supply pump is required to pump hot water in the bathtub with a water supply pump and discharge it at a large flow rate. However, since the large-capacity water supply pump is inevitably large in size, the water supply pump occupies a large space in the limited bathroom.

The inventor of the present invention has attempted to utilize the jet pump action in a bathtub circulation type water discharge device in order to obtain a large flow rate of water discharge by a small pressure pump. That is, the present inventor can discharge water while drawing in the surrounding hot water by a jet with a high-speed small flow rate by utilizing the jet pump action, so that a large flow rate of water can be discharged using a small pressure pump. I thought I could get it. However, by simply applying the structure of the conventional jet pump to the bathtub circulation type water discharge device, although the effect of increasing the flow rate was obtained, it was still not possible to obtain a sufficient flow rate.

Therefore, an object of the present invention is to provide a bathtub circulation type water discharge device capable of obtaining a sufficiently large flow rate while using a small pressure pump.

In order to solve the above-mentioned problems, the present invention is a bathtub circulation type water discharge device that takes in hot water in a bathtub and discharges the taken-in hot water into the bathtub from above the water surface of the bathtub, and is above the upper end of the bathtub. It has a water discharge part that is attached to the bathtub and is provided with a water discharge hole for discharging hot water into the bathtub, and a water supply device that sends the hot water in the bathtub to the water discharge part. a water reservoir which is stored and flows through the water head pressure, the water reservoir is connected to the opened water reservoir inlet to a connection pipe for communicating the intake and the water reservoir provided in the wall of the bathtub, the water reservoir A throat pipe that extends from the opened throat hole to the water discharge part and connects the water reservoir and the water discharge part, a pressurizing pump that pressurizes the hot water in the bathtub and flows it into the water reservoir, and hot water pressurized by this pressurizing pump. Is jetted into the basin chamber, and the jet nozzle provided toward the throat hole so that the jetted hot water flows out from the throat hole while drawing in the hot water stored around the water passage in the basin chamber. To disperse the flow of hot water by colliding the hot water flowing in from the inlet of the water reservoir so that the flow of hot water flowing in does not cause a vortex around the water passage in the water reservoir. It is characterized in that a water flow dispersal portion is provided in the water reservoir chamber.

The bathtub circulation type water discharge device of the present invention includes a water discharge unit provided with a water discharge hole for discharging hot water into the bathtub, and a water supply device for feeding the hot water in the bathtub to the water discharge unit. Hot water in the bathtub flows into the water reservoir provided in this water supply device from the inlet of the water reservoir through the connecting pipe due to the head pressure, and is stored. Further, a throat hole is opened in the water reservoir, and hot water is sent from the throat hole to the water discharge portion through the throat pipe. Further, the water reservoir is provided with an injection nozzle toward the throat hole, and the hot water in the bathtub pressurized by the pressure pump is injected from this injection nozzle. The hot water sprayed from the injection nozzle into the water reservoir chamber flows out from the throat hole while drawing in the hot water stored in the water passage path, and the hot water is sent to the water discharge portion.

The inventor of the present invention prototyped a bathtub circulation type water discharge device applying a jet pump action, and discharged hot water from the water discharge part into the bathtub. Although it increased significantly, it was not enough to obtain a pleasant massage effect. As a result of intensive research to increase the discharge water flow rate, the inventor of the present invention causes the flow of hot water flowing into the water reservoir chamber from the connection pipe through the inlet of the reservoir chamber to be on the water flow path by the injection nozzle in the reservoir chamber. It was found that a vortex was generated and the flow rate was reduced. That is, when the hot water flowing from the connecting pipe through the inlet of the water reservoir generates a vortex in the water storage chamber, the flow of the hot water drawn by the flow injected from the injection nozzle also includes the vortex flow. In this way, when a flow including a vortex flows in through the throat hole, a large flow path resistance is generated in the flow in the throat pipe, and the energy given by the pressurizing pump is diminished. As a result, the flow rate discharged from the water discharge portion was reduced.

According to the present invention configured as described above, since the water flow dispersion portion for colliding the hot water flowing in from the inlet of the water reservoir to disperse the flow of the hot water is provided in the water storage chamber, the flow of the inflowing hot water However, it is possible to suppress the generation of a vortex in the water flow path in the reservoir chamber and the generation of a vortex in the flow flowing out from the throat pipe. Therefore, according to the bathtub circulation type water discharge device of the present invention, the energy given by the pressurizing pump can be effectively utilized, and a sufficiently large flow rate can be obtained while using a small pressurizing pump. Can be done.

In the present invention, the water flow dispersion portion is preferably a wall surface provided adjacent to a water passage path through which hot water discharged from an injection nozzle flows.
According to the present invention configured in this way, since the water flow dispersion portion is composed of the wall surface provided adjacent to the water flow path, the flow of hot water dispersed by colliding with the water flow dispersion portion is newly added. Hot water can be drawn into the throat hole before the vortex flow grows, and the generation of the vortex can be further suppressed.

In the present invention, preferably, the inlet of the reservoir chamber is open to the lower wall surface of the reservoir chamber, and the water flow dispersion portion is composed of the upper wall surface of the reservoir chamber facing the inlet of the reservoir chamber.
According to the present invention configured in this way, the water flow is formed by opening the water flow inlet to the lower wall surface of the water storage chamber and the water flow dispersion portion by the upper wall surface of the water storage chamber facing the water storage chamber inflow port. The water flow can be dispersed without providing a special wall surface as the dispersion portion. Further, since the water flow dispersion portion is composed of the upper wall surface of the water reservoir, the flow of hot water after colliding with the water flow dispersion portion is likely to be slowed down, and it is effective that a vortex is generated after colliding with the water flow dispersion portion. Can be suppressed. Further, since the inlet of the reservoir chamber is provided on the lower wall surface of the reservoir chamber, when the water level in the bathtub drops, the hot water in the reservoir chamber is discharged into the bathtub through the inlet of the reservoir chamber and is discharged into the bathtub. It is possible to prevent residual water from being generated in the bathtub.

In the present invention, preferably, the throat hole is formed on the upper wall surface of the water reservoir, and the water reservoir inlet and the throat hole are formed at positions that do not overlap in the top view.
According to the present invention configured in this way, since the water reservoir inlet and the throat hole are formed at positions that do not overlap in the top view, a part of the hot water flowing in from the reservoir chamber inlet collides with the water flow dispersion portion. It is possible to prevent the inflow into the throat hole without doing so. As a result, it is possible to prevent a vortex from being generated due to a large bias in the flow velocity distribution in the throat pipe due to the flow of hot water flowing in from the inlet of the reservoir chamber.

In the present invention, preferably, a straight portion having a predetermined length extending parallel to the vertical line at the center of the inlet of the reservoir is provided at the end of the connecting pipe connected to the inlet of the reservoir.
According to the present invention configured in this way, since a straight portion having a predetermined length extending parallel to the vertical line at the center of the water reservoir inlet is provided at the end of the connecting pipe, the connecting pipe flows through the connecting pipe. The distribution of the flow velocity when the hot water passes through the inlet of the reservoir chamber can be made uniform, and the generation of vortices in the reservoir chamber can be further suppressed.

In the present invention, preferably, a straight portion having a predetermined length is provided at the end of the connecting pipe connected to the inlet of the water reservoir, and the central axis of the straight portion is on the wall surface constituting the water flow dispersion portion. It is oriented so that it is orthogonal.
If the hot water flowing in from the inlet of the water reservoir diagonally collides with the water flow dispersion portion, the hot water flow may not be sufficiently dispersed and may be totally deflected to generate a vortex flow. According to the present invention configured as described above, since the central axis of the straight portion at the end of the connecting pipe is directed so as to be orthogonal to the wall surface constituting the water flow dispersion portion, the water flow is dispersed through the straight portion. The flow of hot water that collides with the part can be reliably dispersed.

According to the bathtub circulation type water discharge device of the present invention, a sufficiently large flow rate can be obtained while using a small pressure pump.

It is a perspective view which shows the state which applied the bathtub circulation type water discharge device by 1st Embodiment of this invention to a bathtub. It is a top view which shows the state which applied the bathtub circulation type water discharge device by 1st Embodiment of this invention to a bathtub. It is a full sectional view which shows the state which applied the bathtub circulation type water discharge device by 1st Embodiment of this invention to a bathtub. It is a side view which shows the state which applied the bathtub circulation type water discharge device by 1st Embodiment of this invention to a bathtub. It is a perspective view which showed by extracting the main part of the bathtub circulation type water discharge device by 1st Embodiment of this invention. It is a side sectional view of the jet pump unit provided in the water supply device of the bathtub circulation type water discharge device according to the first embodiment of the present invention. It is a top sectional view of the jet pump unit provided in the water supply device of the bathtub circulation type water discharge device according to the first embodiment of the present invention. It is a top sectional view of the water reservoir in the bathtub circulation type water discharge device according to the 2nd Embodiment of this invention. It is a side sectional view of the water storage chamber in the bathtub circulation type water discharge device according to the 2nd Embodiment of this invention. It is a top sectional view of the water reservoir in the bathtub circulation type water discharge device according to the 3rd Embodiment of this invention. It is a side sectional view of the water storage chamber in the bathtub circulation type water discharge device according to the 3rd Embodiment of this invention. It is a top view of the water reservoir of the comparative example with respect to the embodiment of this invention.

Next, a bathtub circulation type water discharge device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 4 are a perspective view, a plan view, a full cross-sectional view, and a side view showing a state in which the bathtub circulation type water discharge device according to the first embodiment of the present invention is applied to a bathtub.
As shown in FIGS. 1 and 2, the bathtub circulation type water discharge device 1 according to the first embodiment of the present invention is applied to a bathtub 2 such as a facility, a home or the like, a bathroom or a bathroom, and is near the upper end of the bathtub 2. Placed in. The bathtub 2 stores hot water (hot water or water) as bathtub water.

The bathtub 2 is connected to the bottom 2a in which the buttocks or feet of the bathing user are in contact, the vertical wall 2b in which the back of the bathing user is in contact, and the upper portion of the vertical wall 2b, and is connected to the upper surface of the bathtub 2. It includes an upper end portion 2c to be formed. The upper end 2c is formed at a height relatively close to the upper body of the user sitting in the bathtub and taking a bath, for example, the head, neck, or shoulders. Further, the bathtub 2 is provided with a water supply device (not shown) capable of supplying hot water into the bathtub 2 from an external water supply source, a hot water supply device, or the like.

The bathtub circulation type water discharge device 1 includes a water discharge unit 4 that discharges the supplied hot water from a water discharge hole 4a formed in a wide shape in the left-right direction, and a water supply device that supplies the hot water in the bathtub 2 to the water discharge unit 4. There is. The water spouting portion 4 is arranged on the upper end portion 2c of the bathtub 2, and a shoulder bath that spouts wide water from the spouting hole 4a in the left-right direction toward the neck and shoulders of the user who is sitting and taking a bath. It is designed to spout water. That is, the bathtub circulation type water discharge device 1 of the present embodiment takes in the hot water in the bathtub 2 and discharges the taken-in hot water into the bathtub 2 from above the water surface of the bathtub 2. The wide water discharge hole 4a can discharge water in a band shape having a width about the width of the user's shoulder. The left-right direction of the water discharge hole 4a is the left-right direction with respect to the water discharge direction of the water discharge hole, and is the left-right direction of the vertical wall 2b in contact with the back of the user of the bathtub 2.

As shown in FIGS. 3 and 4, the bathtub circulation type water discharge device 1 is further provided on the first flow path 8 extending from the first intake port 6 formed on the side wall 2d of the bathtub 2 and on the first flow path 8. From the pump 10, which is a pressurizing pump provided and which sucks the water in the bathtub 2 and pumps it to the downstream side, the three-way valve 12 which controls the flow of water at the downstream end of the first flow path 8, and the three-way valve 12. The second flow path 14 extending to the water discharge hole 4a side, the third flow path 16 extending from the three-way valve 12 separately from the second flow path 14, and the water supplied from the third flow path 16 are centered in the vertical direction of the bathtub 2. A blow water discharge portion 18 that blows water into the bathtub 2 from slightly below, a jet pump unit 20 provided in a downstream portion of the second flow path 14, and a jet from a second intake port 22 formed on the side wall of the bathtub 2. A fourth flow path 24 which is a connecting pipe extending to the pump unit 20, a rising pipe 26 which is a throat pipe extending vertically upward from the jet pump unit 20, a control unit 28 which controls the pump 10 and the three-way valve 12, and a user. It is provided with an operation unit 30 operated by. In the present embodiment, the pump 10, the jet pump unit 20, the fourth flow path 24, and the riser pipe 26 function as a water supply device that sends the hot water in the bathtub 2 to the water discharge unit 4.

The first flow path 8 forms a flow path extending from the first intake port 6 to the three-way valve 12 via the pump 10. The pump 10 is configured to suck hot water in the bathtub 2 through the first intake port 6 and pump it. The pump 10 sucks water and pumps it downstream as the impeller (not shown) directly connected to the electrically driven electric motor (not shown) rotates. The pump 10 is electrically connected to the control unit 28 and is driven and controlled by the control unit 28.

The three-way valve 12 can selectively supply the water supplied from the first flow path 8 to both or one of the second flow path 14 and the third flow path 16. When the second flow path 14 and the third flow path 16 are open at the same time, the three-way valve 12 can freely change the distribution ratio of the flow rate. The three-way valve 12 is electrically connected to the control unit 28 and is electrically controlled to open and close by the control unit 28. The three-way valve 12 can selectively execute both or one of the supply of hot water to the water discharge unit 4 and the supply of hot water to the blow water discharge unit 18.

The second flow path 14 forms a flow path extending from the three-way valve 12 to the jet pump unit 20. The third flow path 16 forms a flow path extending from the three-way valve 12 to the blow water discharge portion 18.

Two blow water discharge portions 18 are provided on the vertical wall 2b on the water discharge hole 4a side of the bathtub 2. The blow water discharge portion 18 is formed so that the diameter of the flow path inside the blow water discharge portion 18 is narrower than the diameter of the flow path on the upstream side. The blow water discharge unit 18 is mounted sideways, which is close to horizontal, and discharges high-speed blow water from the blow water discharge unit 18 sideways. The blow water discharge unit 18 directly ejects the water flow pumped from the pump 10 via the third flow path 16. Therefore, the blow water discharge unit 18 forms a water discharge flow having a relatively small flow rate and a high speed according to the amount of water sent out by pumping the pump 10. When the blow water discharged from the blow water discharge unit 18 collides with the waist and back of the user, the waist and back of the user can be pressed and the massage effect can be achieved.

The control unit 28 is electrically connected to the pump 10, the three-way valve 12, the operation unit 30, and the like, can transmit and receive electric signals to and from each other, and can electrically operate each of the above-mentioned parts. .. The control unit 28 controls each device according to a program or the like that receives or stores an operation signal from the operation unit 30. The control unit 28 includes a storage device (not shown) such as a memory and an arithmetic unit (not shown) that can appropriately control the bathtub circulation type water discharge device 1. The control unit 28 is attached to the back side of the wall surface (not shown) of the bathroom.

The operation unit 30 is an operation unit such as an operation panel capable of performing an operation desired by the user, and is attached to a wall surface in the bathroom. Information that the user H has operated the operation unit 30 is sent from the operation unit 30 to the control unit 28 by an electric signal.

Next, in the bathtub circulation type water discharge device 1 of the present embodiment, the configuration of the water supply device that sends the hot water in the bathtub 2 to the water discharge unit 4 will be described in detail with reference to FIGS. 5 to 7.
FIG. 5 is a perspective view showing an extracted main part of the bathtub circulation type water discharge device 1 of the present embodiment. FIG. 6 is a side sectional view of the jet pump unit 20 provided in the water supply device, and FIG. 7 is a plan sectional view of the jet pump unit 20.

As shown in FIG. 5, the jet pump unit 20 has a rising pipe 26 which is a throat pipe extending vertically upward and a second flow path to which hot water pressurized by a pump 10 which is a pressurizing pump is sent. 14 and a fourth flow path 24, which is a connecting pipe communicating with the second intake 22 of the tub 2, are connected to each other.
The hot water discharged from the jet pump unit 20 via the riser pipe 26 flows into the water discharge unit 4 and is discharged in a waterfall shape from the wide water discharge hole 4a. The hot water discharged from the water discharge hole 4a flows down into the bathtub 2 from above the water surface of the bathtub 2 and hits the shoulders and nape of the user who is taking a bath. As a result, the effect of comfortably massaging the user can be obtained.

On the other hand, the fourth flow path 24 connected to the lower surface of the jet pump unit 20 communicates with the second intake port 22 which is submerged in the bathtub 2. Further, since the jet pump unit 20 is provided at a position lower than the general water surface height of the bathtub 2 filled with hot water, the hot water in the bathtub 2 is subjected to the second intake port 22 due to the head pressure of the hot water. , Flows into the jet pump unit 20 via the fourth flow path 24.
Further, the second flow path 14 connected to the lower surface of the jet pump unit 20 is connected to the pump 10. Therefore, the hot water in the bathtub 2 sucked by the pump 10 through the first intake port 6 flows into the jet pump unit 20 at a high flow rate through the second flow path 14.

The hot water that has been sent into the jet pump unit 20 from the second flow path 14 at a high flow velocity rises in the riser pipe 26 while entraining the hot water that has flowed into the jet pump unit 20 from the fourth flow path 24 by the jet pump action. As a result, a large flow rate of hot water flows into the riser pipe 26, and is discharged in a waterfall shape from the water discharge hole 4a of the water discharge unit 4.

Next, the internal structure of the jet pump unit 20 will be described with reference to FIGS. 6 and 7.
As shown in FIG. 6, a box-shaped water reservoir 32 is formed inside the jet pump unit 20. The water reservoir 32 constitutes a substantially rectangular parallelepiped space, and a fourth flow path 24 is connected to one end of a lower wall surface (floor surface) thereof, and a second flow path 14 is connected to the other end. ing. That is, an opening is formed in the lower wall surface of the water reservoir 32, and the downstream end of the fourth flow path 24 connected to the opening constitutes the water storage chamber inflow port 32a. Further, a straight portion 24a having a predetermined length is provided at the downstream end of the fourth flow path 24. The straight line portion 24a is oriented parallel to the vertical line C at the center of the circular water reservoir inlet 32a.

On the other hand, the downstream end of the second flow path 14 has a reduced flow path cross-sectional area and is connected upward to the lower wall surface of the water reservoir 32. An injection nozzle 34 is attached to the connection portion between the water reservoir 32 (jet pump unit 20) and the second flow path 14 so as to face upward. The injection nozzle 34 is a member having a substantially cylindrical shape, and the flow path formed inside is tapered so as to taper toward the tip. Further, the tip of the injection nozzle 34 is arranged so as to project upward from the lower wall surface of the water reservoir 32.
As a result, the hot water pressurized by the pump 10 flows into the injection nozzle 34 from the second flow path 14, where the flow velocity is further increased and the hot water is injected upward from the injection port 34a at the tip of the injection nozzle 34. ..

Further, the rising pipe 26 is connected to the upper wall surface (ceiling surface) of the water reservoir 32 at a position facing the injection nozzle 34. The upstream end of the riser pipe 26 is connected to an opening formed in the upper wall surface of the water reservoir 32, and forms a throat hole 26a. Therefore, the throat hole 26a is provided on the upper wall surface of the water reservoir 32 and faces the lower wall surface of the water storage chamber 32. A relatively large radius is provided at the edge of the throat hole 26a in order to reduce the inflow resistance to the riser pipe 26.

Further, in the present embodiment, the central axis of the rising pipe 26 having a circular flow path cross section and the central axis of the injection port 34a of the injection nozzle 34 having a circular flow path cross section are configured to coincide with each other. In this way, the injection nozzle 34 is arranged toward the throat hole 26a at the upstream end of the riser pipe 26. The central axes of the riser pipe 26 and the injection port 34a coincide with the water passage path J in which the hot water injected from the injection nozzle 34 flows into the riser pipe 26.

Further, as shown in FIG. 7, the injection nozzle 34 and the throat hole 26a are arranged at the center of the water reservoir 32 in the short side direction in the top view. Further, the water reservoir chamber inflow port 32a, which is the downstream end of the fourth flow path 24, is also arranged at the center of the reservoir chamber 32 in the short side direction. Further, as shown in FIG. 7, the throat hole 26a and the water reservoir inlet 32a are formed at positions that do not overlap in the top view. Further, in the present embodiment, the water reservoir chamber inflow port 32a has a flow path cross-sectional area that is at least twice the flow path cross-sectional area of the riser pipe 26.

Next, the operation of the bathtub circulation type water discharge device 1 according to the first embodiment of the present invention will be described.
First, when the bathtub 2 is filled with hot water, the first intake port 6 and the second intake port 22 provided on the side wall 2d of the bathtub 2 are in a submerged state. Therefore, the inside of the water reservoir 32 communicating with the second intake port 22 via the fourth flow path 24 is also filled with hot water. On the other hand, the inside of the pump 10 communicating with the first intake port 6 via the first flow path 8 is also filled with hot water.

When the user who is taking a bath operates the operation unit 30 to perform blow water discharge, the control unit 28 sends a signal to the three-way valve 12 and switches this to a state in which the first flow path 8 and the third flow path 16 communicate with each other. At the same time, a signal is sent to the pump 10 to operate it. As a result, the hot water in the bathtub 2 is taken in from the first flow path 8 and discharged from the blow water discharge unit 18 via the first flow path 8, the pump 10, the three-way valve 12, and the third flow path 16. The flow of hot water discharged from the blow water discharge unit 18 into the bathtub 2 allows the user's waist and the like to be comfortably massaged.

When the user who is taking a bath operates the operation unit 30 to discharge water from the water discharge unit 4, the control unit 28 sends a signal to the three-way valve 12, and the first flow path 8 and the second flow path 14 communicate with each other. At the same time as switching to the state of operating, a signal is sent to the pump 10 to operate it. When the pump 10 is operated in this state, the hot water in the bathtub 2 is taken in from the first flow path 8 and injected through the first flow path 8, the pump 10, the three-way valve 12, and the second flow path 14. Hot water is ejected from the nozzle 34. Since the injection nozzle 34 injects hot water into the water reservoir 32 filled with hot water, the jet flow ejected from the injection port 34a can use the hot water filled around the water passage path J in the water reservoir 32. It flows upward while being pulled in, and flows into the throat hole 26a provided so as to face the injection nozzle 34.

As a result, a flow rate of hot water larger than the flow rate injected by the injection nozzle 34 flows into the riser pipe 26, and a large flow rate of hot water is discharged from the water discharge hole 4a of the water discharge unit 4 connected to the upper end of the riser pipe 26. NS. Since the water discharge hole 4a is formed to be wide, the wide waterfall-shaped hot water flows down into the bathtub 2 from above the water surface of the bathtub 2. Since this waterfall-shaped spout hits the user while taking a bath, the shoulders and nape of the user can be comfortably massaged.

On the other hand, the jet jet ejected from the injection port 34a entrains the hot water accumulated in the water reservoir 32 and flows out from the throat hole 26a, but the hot water for the outflow flows from the fourth flow path 24 to the water reservoir inlet 32a. It flows into the water reservoir 32 through the water reservoir 32 and is replenished. Therefore, while the hot water is being injected from the injection port 34a, the hot water continuously flows into the water reservoir 32 through the water reservoir inlet 32a, and the hot water is always stored in the water reservoir 32. ing.

The flow of hot water flowing into the water reservoir 32 through the water reservoir inlet 32a goes upward from the downstream end (water reservoir inlet 32a) of the fourth flow path 24 and faces the water reservoir inlet 32a. It collides with the upper wall surface 32b (ceiling surface) of the provided water reservoir 32. The flow of hot water that collides with the upper wall surface 32b is dispersed in the reservoir chamber 32, and a large deviation of the flow velocity distribution in the reservoir chamber 32 is suppressed. That is, as shown by arrows in FIGS. 6 and 7, the velocity vector of the flow of the hot water flowing from the water reservoir inlet 32a is lost by colliding with the upper wall surface 32b of the water reservoir 32, and the hot water is lost. It flows toward the injection nozzle 34 while approaching a uniform velocity distribution. That is, as shown in FIG. 7, the flow velocity of the hot water toward the injection nozzle 34 is substantially symmetrical on both sides of the injection nozzle 34 (on the upper side and the lower side of the injection nozzle 34 in FIG. 7). As a result, the bias of the velocity distribution is sufficiently suppressed around the water flow path J in the water reservoir 32, and the generation of vortices around the water flow path J is suppressed.

Therefore, the upper wall surface 32b of the water reservoir 32 provided opposite to the water storage chamber inflow port 32a is a water flow that suppresses the generation of a vortex in the flow path and the flow flowing out from the throat hole 26a. Functions as a distribution unit. As shown in FIG. 6, the upper wall surface 32b that functions as the water flow dispersion portion is a wall surface provided adjacent to the water flow path J. Here, in the present embodiment, the closest distance d between the inner wall surface of the fourth flow path 24 and the inner wall surface of the riser pipe 26 is about 54 mm.

By making the velocity distribution around the water flow path J uniform, the velocity distribution of the hot water drawn into the throat hole 26a by the jet flow from the injection nozzle 34 is close to axisymmetry with the water flow path J as the central axis. Become. As a result, the flow of hot water flowing into the rising pipe 26 from the throat hole 26a becomes smooth, and the hot water rises in the rising pipe 26 without receiving excessive flow path resistance. As described above, since the flow path resistance of the hot water flowing in the riser pipe 26 becomes smaller, the flow rate of the hot water that can be pumped to the water discharge portion 4 by the jet of the same flow velocity and flow rate is higher than that in the case where the flow path resistance is large. Will also increase. As a result, even if a small pump 10 is used, hot water having a sufficient flow rate can be discharged from the spout hole 4a.

Here, FIG. 12 is shown as a comparative example of the water reservoir. FIG. 12 is a plan sectional view of a water reservoir of a comparative example.
The water reservoir 40 of the comparative example shown in FIG. 12 is generally configured in a rectangular parallelepiped shape, and a connecting pipe 42 (corresponding to the fourth flow path 24 of the present embodiment) is connected to one of the side wall surfaces. Further, the injection nozzle 44 is provided on the other end side of the water reservoir 40, and is configured to inject hot water toward the throat holes 46a provided opposite to each other. Further, the water reservoir inlet 40a to which the downstream end of the connecting pipe 42 is connected is formed at one end of one side wall surface of the water reservoir 40.

In the comparative example configured in this way, the vector of the flow of hot water flowing in from the water reservoir inlet 40a remains even around the water passage path on the injection axis of the injection nozzle 44. Therefore, in the comparative example, the flow velocity distribution of the hot water around the water passage path is largely biased (in FIG. 12, the flow velocity is high on the lower side of the injection nozzle 44 and low on the upper side). When such a flow velocity distribution occurs around the water flow path, the flow velocity distribution also occurs in the flow of hot water drawn into the throat hole 46a by the jet flow from the injection nozzle 44. In the comparative example shown in FIG. 12, a vortex centered on the vicinity of the central axis of the injection nozzle 44 is generated in the flow inside the ascending pipe 46 (corresponding to the ascending pipe 26). When a large vortex is generated in the flow in the ascending pipe 46, the hot water flowing in the ascending pipe 46 flows while colliding with the pipe wall of the ascending pipe 46, so that the flow resistance when passing through the ascending pipe 46 increases.

Therefore, the energy given by the jet flow from the injection nozzle 44 is lost due to the flow path resistance of the throat pipe, and the flow rate that can be pumped from the water reservoir 40 to the water discharge portion (not shown in FIG. 12) decreases. It ends up. On the other hand, in the water reservoir 32 (FIGS. 6 and 7) in the present embodiment, since the flow velocity distribution of the hot water around the water passage J is not significantly biased, the flow path resistance in the riser pipe 26 can be reduced. , Hot water can be pumped to the spouting unit 4 at a large flow rate.

According to the bathtub circulation type water discharge device 1 of the first embodiment of the present invention, since the upper wall surface 32b is provided as a water flow dispersion portion in the water reservoir 32 (FIG. 6), the hot water flowing in from the water reservoir inlet 32a Flow is dispersed here, and a vortex can be generated in the water passage J in the water reservoir 32 to suppress the generation of a vortex in the flow in the riser pipe 26. Therefore, according to the bathtub circulation type water discharge device 1 of the present embodiment, the energy given by the pump 10 can be effectively utilized, and a sufficiently large flow rate can be obtained while using the small pump 10. Can be done.

Further, according to the bathtub circulation type water discharge device 1 of the present embodiment, since the water flow dispersion portion (upper wall surface 32b) is composed of the wall surface provided adjacent to the water flow path, it collides with the water flow dispersion portion. Before a new vortex grows in the dispersed flow of hot water, the hot water can be drawn into the throat hole, and the generation of the vortex can be further suppressed.

Further, according to the bathtub circulation type water discharge device 1 of the present embodiment, the water reservoir chamber inflow port 32a opens to the lower wall surface of the water reservoir chamber 32, and the water flow dispersion portion faces the upper wall surface of the water reservoir chamber 32 facing the water reservoir chamber inflow port 32. Since it is composed of 32b, the water flow can be dispersed without providing a special wall surface as the water flow dispersion portion. Further, since the water flow dispersion portion is composed of the upper wall surface 32b of the water reservoir 32, the flow of hot water after colliding with the water flow dispersion portion is likely to be decelerated, and a vortex is generated after colliding with the water flow dispersion portion. Can be effectively suppressed. Further, since the water reservoir inlet 32a is provided on the lower wall surface of the water reservoir 32, when the water level in the bathtub 2 drops, the hot water in the water reservoir 32 passes through the water reservoir inlet 32a and the bathtub 2 It is possible to prevent residual water from being discharged into the water reservoir 32.

Further, according to the bathtub circulation type water discharge device 1 of the present embodiment, since the water reservoir inlet 32a and the throat hole 26a are formed at positions that do not overlap in the top view (FIG. 7), the water flows in from the reservoir chamber inlet 32a. It is possible to prevent a part of the hot water from flowing into the throat hole 26a without colliding with the water flow dispersion portion.

Further, according to the bathtub circulation type water discharge device 1 of the present embodiment, a straight line portion 24a extending parallel to the vertical line C at the center of the water reservoir inlet 32a is provided at the end of the fourth flow path 24 which is a connecting pipe. Therefore, the distribution of the flow velocity of the hot water flowing in from the inflow port 32a of the reservoir chamber is not significantly biased. As described above, since the distribution of the flow velocity is not significantly biased, the vortex is less likely to be induced in the water reservoir 32, and the vortex flow in the rising pipe 26 can be suppressed more effectively.

Further, according to the bathtub circulation type water discharge device 1 of the present embodiment, the central axis C of the straight line portion 24a at the end of the fourth flow path 24 which is the connecting pipe is substantially orthogonal to the upper wall surface 32b constituting the water flow dispersion portion. (FIG. 6), the flow of hot water that has collided with the water flow dispersion portion via the straight portion 24a can be reliably dispersed. In the present specification, "orthogonal" means that the angle formed by the wall surface and the axis is in the range of 80 to 100 degrees.

Next, the bathtub circulation type water discharge device according to the second embodiment of the present invention will be described with reference to FIGS. 8 and 9. FIG. 8 is a plan sectional view of the water reservoir according to the second embodiment of the present invention, and FIG. 9 is a side sectional view of the water reservoir.
The bathtub circulation type water discharge device in the present embodiment differs from the first embodiment described above only in the configuration of the jet pump unit. Therefore, here, only the points different from the first embodiment of the present embodiment will be described, and the description of the same configuration, operation, and effect will be omitted.

As shown in FIGS. 8 and 9, a box-shaped water reservoir 132 is formed inside the jet pump unit 120. The water reservoir 132 constitutes a space having a substantially rectangular parallelepiped shape, a fourth flow path 124 is connected to one side wall surface forming a short side thereof, and a second flow path 124 is connected to a lower wall surface (floor surface) at the other end. The flow path 114 is connected. That is, an opening is formed on the side wall surface of the water reservoir 132, and the downstream end of the fourth flow path 124 connected to the opening constitutes the water storage chamber inflow port 132a. Further, a straight portion 124a having a predetermined length is provided at the downstream end of the fourth flow path 124. The straight line portion 124a is oriented parallel to the vertical line C at the center of the circular water reservoir inlet 132a.

On the other hand, the downstream end of the second flow path 114 has a reduced cross-sectional area of the flow path and is connected to the lower wall surface of the water reservoir 132 upward. An injection nozzle 134 is attached to the tip of the second flow path 114 so as to face upward, and this extends into the water reservoir 132 (jet pump unit 120). The injection nozzle 134 is a member having a substantially cylindrical shape, and the flow path formed inside is tapered so as to taper toward the tip. Further, the tip of the injection nozzle 134 is arranged so as to project upward from the lower wall surface of the water reservoir 132.
As a result, the hot water pressurized by the pump flows into the injection nozzle 134 from the second flow path 114, where the flow velocity is further increased and the hot water is injected upward from the injection port 134a at the tip of the injection nozzle 134.

Further, the rising pipe 126 is connected to the upper wall surface (ceiling surface) of the water reservoir 132 at a position facing the injection nozzle 134. The upstream end of the riser pipe 126 is connected to an opening formed in the upper wall surface of the water reservoir 132, and forms a throat hole 126a. Therefore, the throat hole 126a is provided on the upper wall surface of the water reservoir 132 and faces the lower wall surface of the water storage chamber 132. A relatively large radius is provided at the edge of the throat hole 126a in order to reduce the inflow resistance to the riser pipe 126.

Further, in the present embodiment, the central axis of the rising pipe 126 having a circular flow path cross section and the central axis of the injection port 134a of the injection nozzle 134 having a circular flow path cross section are configured to coincide with each other. In this way, the injection nozzle 134 is arranged toward the throat hole 126a at the upstream end of the riser pipe 126. The central axes of the riser pipe 126 and the injection port 134a coincide with the water passage path J in which the hot water injected from the injection nozzle 134 flows into the riser pipe 126.

Further, as shown in FIG. 9, the injection nozzle 134 and the throat hole 126a are arranged at the center of the water reservoir 132 in the short side direction in the top view. Further, the water reservoir chamber inflow port 132a, which is the downstream end of the fourth flow path 124, is also arranged at the center of the reservoir chamber 132 in the short side direction.

Further, as shown in FIG. 9, a collision plate 136 is provided between the water reservoir inlet 132a and the injection nozzle 134. The collision plate 136 is a flat wall surface provided so as to hang vertically downward from the upper wall surface 132b of the water reservoir 132, and is directed in a direction orthogonal to the vertical line C at the center of the water reservoir inlet 132a. ing. As described above, the collision plate 136 is provided adjacent to the water passage path J in which the hot water injected from the injection nozzle 134 flows into the riser pipe 126.

In the present embodiment, the flow path cross-sectional area of the water reservoir inlet 132a, the flow path cross-sectional area on the upstream side of the collision plate 136 of the water reservoir 132, the flow path cross-sectional area on the lower side of the collision plate 136, and the collision plate 136. The cross-sectional area of the flow path on the downstream side of the above is more than twice the cross-sectional area of the flow path of the rising pipe 126.

With this configuration, the hot water that has flowed into the water reservoir 132 through the water reservoir inlet 132a first flows laterally from the downstream end (water reservoir inlet 132a) of the fourth flow path 124 and reaches the water reservoir inlet 132a. It collides with the collision plates 136 provided opposite to each other. The flow of hot water that collides with the collision plate 136 is dispersed in the reservoir chamber 132, and a large deviation of the flow velocity distribution in the reservoir chamber 132 is suppressed. That is, as shown by arrows in FIGS. 8 and 9, the velocity vector of the flow of the hot water flowing from the water reservoir inlet 132a is lost by colliding with the collision plate 136 in the water reservoir 132, and the hot water is lost. Flows below the reservoir 132, approaching a uniform velocity distribution. Further, it flows toward the injection nozzle 134 through the flow path below the collision plate 136. That is, as shown in FIG. 8, the flow velocity of the hot water toward the injection nozzle 134 is substantially symmetrical on both sides of the injection nozzle 134 (on the upper side and the lower side of the injection nozzle 134 in FIG. 8). As a result, the bias of the velocity distribution is sufficiently suppressed around the water flow path J in the water reservoir 132, and the generation of vortices around the water flow path J is suppressed.

Therefore, the collision plate 136 in the reservoir chamber 132 provided opposite to the inlet 132a of the reservoir function as a water flow dispersion unit that disperses the flow of hot water by colliding the hot water flowing in from the inlet 132a of the reservoir chamber. .. As shown in FIG. 9, the collision plate 136 that functions as the water flow dispersion portion is a wall surface provided adjacent to the water passage path J.

According to the bathtub circulation type water discharge device of the second embodiment of the present invention, since the collision wall 136 is provided as a water flow dispersion portion in the water reservoir 132 (FIG. 9), the hot water flowing in from the water reservoir inlet 132a The flow is dispersed here, and it is possible to generate a vortex flow in the water passage J in the water reservoir 132 and suppress the generation of a vortex in the flow in the ascending pipe 126.

Next, the bathtub circulation type water discharge device according to the third embodiment of the present invention will be described with reference to FIGS. 10 and 11. FIG. 10 is a plan sectional view of the water reservoir according to the third embodiment of the present invention, and FIG. 11 is a side sectional view of the water reservoir.
The bathtub circulation type water discharge device in the present embodiment differs from the first embodiment described above only in the configuration of the jet pump unit. Therefore, here, only the points different from the first embodiment of the present embodiment will be described, and the description of the same configuration, operation, and effect will be omitted.

As shown in FIGS. 10 and 11, a cylindrical water reservoir 232 having a substantially elliptical cross section is formed inside the jet pump unit 220. Two fourth flow paths 224 are connected to both ends of the water reservoir 232 having an elliptical cross section, and a second flow path 214 is provided on the lower wall surface (floor surface) between the fourth flow paths 224. It is connected. That is, openings are formed on the lower wall surfaces on both sides of the reservoir chamber 232, and the downstream ends of the fourth flow paths 224 connected to these openings form the reservoir chamber inflow port 232a, respectively. The flow path cross-sectional area of each of the fourth flow paths 224 is the same, and hot water of substantially the same flow rate flows into the water reservoir 232 from both sides. Further, a straight portion 224a having a predetermined length is provided at the downstream end of the fourth flow path 224. These straight portions 224a are oriented parallel to the vertical line C at the center of each circular water reservoir inlet 232a.

On the other hand, the downstream end of the second flow path 214 has a reduced flow path cross-sectional area and is connected upward to the lower wall surface of the water reservoir 232. An injection nozzle 234 is attached to the tip of the second flow path 214 so as to face upward, and this extends into the water reservoir 232 (jet pump unit 220). The injection nozzle 234 is a member having a substantially cylindrical shape, and the flow path formed inside is tapered so as to taper toward the tip. Further, the tip of the injection nozzle 234 is arranged so as to project upward from the lower wall surface of the water reservoir 232.
As a result, the hot water pressurized by the pump flows into the injection nozzle 234 from the second flow path 214, where the flow velocity is further increased and the hot water is injected upward from the injection port 234a at the tip of the injection nozzle 234.

Further, an ascending pipe 226 is connected to a position on the upper wall surface (ceiling surface) of the water reservoir 232 facing the injection nozzle 234. The upstream end of the riser pipe 226 is connected to an opening formed in the upper wall surface of the water reservoir 232 and forms a throat hole 226a. Therefore, the throat hole 226a is provided on the upper wall surface of the water reservoir 232 and faces the lower wall surface of the water storage chamber 232. A relatively large radius is provided at the edge of the throat hole 226a in order to reduce the inflow resistance to the riser pipe 226.

Further, in the present embodiment, the central axis of the rising pipe 226 having a circular flow path cross section and the central axis of the injection port 234a of the injection nozzle 234 having a circular flow path cross section are configured to coincide with each other. In this way, the injection nozzle 234 is arranged toward the throat hole 226a at the upstream end of the riser pipe 226. The central axes of the riser pipe 226 and the injection port 234a coincide with the water passage path J in which the hot water injected from the injection nozzle 234 flows into the riser pipe 226.

Further, as shown in FIG. 10, the injection nozzle 234 and the throat hole 226a are arranged at the center of the water reservoir 232 in the uniaxial direction in the top view. Further, the water reservoir chamber inflow port 232a, which is the downstream end of each fourth flow path 224, is also arranged at the center of the reservoir chamber 232 in the uniaxial direction. Further, as shown in FIG. 10, each reservoir inlet 232a is arranged on both sides of the throat hole 226a, and the throat hole 226a and each reservoir inlet 232a are formed at positions that do not overlap in top view. .. Further, in the present embodiment, the cross-sectional area of the flow path of each water reservoir inlet 232a and the cross-sectional area of the flow path laterally extending through the water reservoir 232 are both equal to or larger than the flow path cross-sectional area of the riser pipe 226. It is configured.

Further, as shown in FIG. 11, each reservoir chamber inflow port 232a is provided so as to face the upper wall surface 232b of the reservoir chamber 232, respectively, and the upper wall surface 232b of the reservoir chamber 232 is the center of each reservoir chamber inflow port 232a. It is oriented in a direction orthogonal to the vertical line C. Further, the upper wall surface 232b of the water reservoir 232 where the hot water flowing in from each water reservoir inlet 232a collides with each other is provided adjacent to the water passage path J in which the hot water injected from the injection nozzle 234 flows into the riser pipe 226. There is.

With this configuration, the hot water that has flowed into the reservoir chamber 232 through each reservoir inlet 232a first flows upward from the downstream end (water reservoir inlet 232a) of each fourth flow path 224, and is provided so as to face each other. It collides with the upper wall surface 232b of the water reservoir 232, respectively. The flow of hot water that collides with the upper wall surface 232b is dispersed in the reservoir chamber 232, and a large deviation of the flow velocity distribution in the reservoir chamber 232 is suppressed. Further, as shown by the arrows in FIG. 11, the hot water that collides with the upper wall surface 232b at both ends of the reservoir chamber 232 flows from both sides toward the center of the reservoir chamber 232. Here, since the two reservoir chamber inflow ports 232a are configured to have the same dimensions and shape, the flow of hot water from both ends of the reservoir chamber 232 toward the center is also symmetrical. Therefore, the velocity vectors of the flows from the left and right sides that merge near the injection nozzle 234 cancel each other out, the flow velocity becomes slower in the central portion of the water reservoir 232, and the flow velocity distribution becomes almost uniform. As a result, the bias of the velocity distribution is sufficiently suppressed around the water flow path J in the water reservoir 232, and the generation of vortices around the water flow path J is suppressed.

Therefore, the upper wall surface 232b of the water reservoir 232 provided so as to face the water flow inlet 232a functions as a water flow dispersion portion. As shown in FIG. 11, the upper wall surface 232b that functions as the water flow dispersion portion is a wall surface provided adjacent to the water flow path J. Further, the generation of vortices in the flow flowing out from the throat hole 226a is also suppressed by the configuration in which a plurality of water reservoir inlet 232a are provided symmetrically on both sides of the throat hole 226a.

Further, according to the bathtub circulation type water discharge device of the present embodiment, a plurality of water storage chamber inflow ports 232a are provided on the lower wall surface of the water storage chamber 232, and the upper wall surface 232b of the water storage chamber 232 is provided opposite to these. Therefore, the hot water flowing in from the inflow port 232a of each reservoir collides with the upper wall surface 232b which is the water flow dispersion portion of the reservoir chamber 232, and the flow velocity is reduced and dispersed. As a result, the generation of vortices in the riser pipe 226 can be suppressed. Further, since the inlet 232a of each reservoir is provided on the lower wall surface of the reservoir 232, when the water level in the bathtub 2 drops, the hot water in the reservoir 232 passes through the inlet of each reservoir to the bathtub. It is possible to prevent residual water from being discharged into the water reservoir 232 and remaining in the water reservoir 232.

Although the preferred embodiment of the present invention has been described above, various modifications can be made to the above-described embodiment. In particular, the present invention can be configured by appropriately combining the feature portions provided in each of the above-described embodiments.

1 Bathtub circulation type water discharge device 2 Bathtub 2a Bottom 2b Vertical wall 2c Upper end 2d Side wall 4 Water discharge part 4a Water discharge hole 6 First water intake 8 First flow path 10 Pump (pressurization pump)
12 Three-way valve 14 Second flow path 16 Third flow path 18 Blow water discharge unit 20 Jet pump unit 22 Second intake port 24 Fourth flow path (connection pipe)
24a Straight part 26 Ascending pipe (throat pipe)
26a Throat hole 28 Control unit 30 Operation unit 32 Water reservoir 32a Water reservoir inlet 32b Upper wall surface (water flow dispersion)
34 Injection nozzle 34a Injection port 40 Water reservoir 40a Water reservoir inlet 42 Connection pipe 44 Injection nozzle 46 Rise pipe 46a Throat hole 120 Jet pump unit 114 Second flow path 124 Fourth flow path (connection pipe)
124a Straight part 126 Ascending pipe (throat pipe)
126a Throat hole 132 Reservoir 132a Reservoir inlet 132b Upper wall surface (water flow dispersion)
134 Injection nozzle 134a Injection port 136 Collision plate 220 Jet pump unit 214 Second flow path 224 Fourth flow path (connection pipe)
224a Straight part 226 rising pipe (throat pipe)
226a Throat hole 232 Reservoir 232a Reservoir inlet 232b Upper wall surface (water flow dispersion)
234 Injection nozzle 234a Injection port

Claims (6)

It is a bathtub circulation type water discharge device that takes in the hot water in the bathtub and discharges the taken in hot water from above the water surface of the bathtub into the bathtub.
A water spouting part mounted on the upper end of the bathtub and provided with a spouting hole for discharging hot water into the bathtub.
It has a water supply device that sends hot water in the bathtub to the spouting part.
This water supply device
A basin where hot water in the bathtub flows in and is stored due to the head pressure,
The water reservoir is connected to the opened water reservoir inlet to a connection pipe for communicating the intake port and the water reservoir provided in the wall surface of the tub,
A throat pipe that extends from a throat hole opened in the water reservoir to the water discharge portion and communicates the water reservoir with the water discharge portion.
A pressurizing pump that pressurizes the hot water in the bathtub and causes it to flow into the water reservoir.
The hot water pressurized by the pressurizing pump is jetted into the water reservoir, and the jetted hot water flows out from the throat hole while drawing in the hot water stored around the water passage path in the water reservoir. As described above, the injection nozzle provided toward the throat hole and
With
A water flow that disperses the flow of hot water by colliding the hot water that has flowed in from the inlet of the water reservoir so that the flow of hot water that has flowed in does not cause a vortex around the water flow path in the water reservoir. A bathtub circulation type water discharge device characterized in that a dispersion portion is provided in the water reservoir. The bathtub circulation type water discharge device according to claim 1, wherein the water flow dispersion unit is a wall surface provided adjacent to the water passage path through which hot water discharged from the injection nozzle flows. The first or second claim, wherein the water reservoir inlet is open to the lower wall surface of the water reservoir, and the water flow dispersion portion is composed of an upper wall surface of the water reservoir facing the water reservoir inlet. Bathtub circulation type water spouting device. The bathtub circulation type water discharge device according to claim 3, wherein the throat hole is formed on the upper wall surface of the water reservoir, and the water reservoir inlet and the throat hole are formed at positions that do not overlap in top view. The bathtub according to claim 4, wherein a straight portion having a predetermined length extending parallel to the vertical line at the center of the inlet of the reservoir is provided at the end of the connecting pipe connected to the inlet of the reservoir. Circulating water spouting device. A straight portion having a predetermined length is provided at the end of the connecting pipe connected to the inlet of the water reservoir, and the central axis of the straight portion is orthogonal to the wall surface constituting the water flow distribution portion. The bathtub circulation type water discharge device according to any one of claims 1 to 5, which is directed to the bathtub circulation type water discharge device.

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