JP6889834B2 - Water spouting device for bathtub - Google Patents

Description

The present invention relates to a water spouting device for a bathtub, and more particularly to a water spouting device for a bathtub which is installed in a bathtub and discharges wide water.

Conventionally, for example, as described in Patent Document 1, a water discharge device for a bathtub that discharges wide-shaped water has been known. In the water spouting device for bathtubs, when spouting wide water, the side wall of the spout is moved outward in the left-right direction in order to prevent the water spouted from the spout from being compressed inward. It is formed to spread.

However, if the angle toward the outside of the side wall portion of the spout is made too large, the spout may spread too much and the spout may be spouted in a direction not intended by the user. Therefore, there is a request to prevent this. Further, since the space in which the water discharge device for a bathtub can be installed is limited, there is a demand to reduce the size of the water discharge device in the front-rear direction to make it compact. However, if the inclination angle of the side wall surface is changed abruptly, an angle is formed. This corner causes stagnation of the water flow, and there is a risk that the water discharged by this stagnation will be disturbed, so there is a request to prevent this.
Therefore, due to such a request, the side wall is formed to be gradually curved so as not to form a corner and to suppress the lateral spread of the side wall.

Japanese Unexamined Patent Publication No. 2016-7360

However, even if the side wall is curved while suppressing the lateral spread, when the water flow is guided along the curved side wall, the water may gradually separate from the side wall to generate a vortex. As a result, there has been a problem that the wide spout flow from the spout is disturbed or the wide spout flow from the spout is broken.

Therefore, an object of the present invention is to provide a water discharge device for a bathtub that can prevent the wide water discharge from a wide water discharge port from being disturbed or cracked.

In order to achieve the above object, the present invention is a water discharge device for a bathtub which is installed in a bathtub and discharges wide water, and the supplied water is discharged from a spout formed in a wide shape in the left-right direction. The water spouting device main body is provided with a water spouting device main body, and the water spouting device main body includes a storage chamber for temporarily storing water flowing in from an inflow port connected to a supply pipe and expanding it in the left-right direction, and the storage chamber and the spout. A throttle flow path formed so as to have a flow path cross-sectional area smaller than the flow path cross-sectional area of the storage chamber is formed so as to accelerate the water flowing in from the storage chamber. The side wall of the chamber is curved from the vicinity of the inflow port toward the spout, and the storage chamber is provided with ribs in a region downstream of the inflow port and near the side walls on both sides of the storage chamber. It is formed so as to reduce the cross-sectional area of the flow path between the bottom surface or the ceiling surface and the facing surface, and the water flow that has flowed into the storage chamber and has been decelerated is accelerated again along the side wall of the storage chamber. It is characterized by suppressing the formation of a vortex due to the separation of the flowing water from the side wall.
In the present invention configured as described above, the ribs are formed so as to reduce the cross-sectional area of the flow path between the bottom surface or the ceiling surface and the facing surfaces in the region near the side walls on both sides in the storage chamber. There is. This rib can re-accelerate the decelerated water flow that has flowed into the storage chamber and suppress the formation of a vortex due to separation of the water flowing along the curved side wall from the side wall. Therefore, it is possible to prevent the wide spout from the wide spout from being disturbed or cracked.
Further, for example, the length of the storage chamber in the front-rear direction is not changed from the conventional method, and the length of the water discharge device for the bathtub in the front-rear direction is relatively suppressed, and the water flows from the side wall of the water flowing along the curved side wall. The formation of a vortex due to peeling can be suppressed.

In the present invention, preferably, the flow path of the gap between the rib and the bottom surface or the ceiling surface facing the rib is formed to have a constant size in the left-right direction.
In the present invention configured as described above, the flow path of the gap between the rib and the bottom surface or the ceiling surface facing the rib is formed to have a constant size in the left-right direction. Therefore, the acceleration of the water flow can be made constant in the left-right direction. Therefore, it is possible to prevent the wide spout from the wide spout from being disturbed or cracked.

In the present invention, preferably, the water discharge device main body has a flow path cross-sectional area larger than the flow path cross-sectional area between the rib and the throttle flow path between the rib and the surface facing the rib. An enlarged space portion having the above is formed.
In the present invention configured as described above, since the enlarged space portion has a flow path cross-sectional area larger than the flow path cross-sectional area between the rib and the surface facing the rib, the enlarged space portion is accelerated by the rib. The water flow can be slowed down again before flowing into the flow path and the water can be spread again. Therefore, the water can be distributed to the left and right in the water storage chamber while suppressing the formation of the vortex. Therefore, it is possible to more reliably discharge the wide water from the spout, and it is possible to prevent the wide water from the spout from being disturbed or cracked.

In the present invention, the ribs are preferably formed so as to cross the storage chamber in the left-right direction from the side walls on both sides of the storage chamber.
In the present invention configured as described above, the ribs are formed so as to cross the storage chamber in the left-right direction from the side walls on both sides of the storage chamber. Therefore, as compared with the case where the ribs are formed only in the region near the side walls on both sides in the storage chamber, it is possible to suppress the formation of a vortex in the water flowing in the region near the center of the storage chamber.

In the present invention, preferably, the upstream end of the rib is arranged at a position closer to the inflow port than the inlet of the throttle flow path.
In the present invention configured in this way, the upstream end of the rib is arranged at a position closer to the inflow port than the inlet of the throttle flow path. Therefore, the water flow that has flowed into the storage chamber and has been decelerated can be accelerated by passing through a region where the cross-sectional area of the flow path between the rib and the facing surface is reduced at a relatively early stage. Therefore, it is possible to accelerate the water flow and suppress the formation of the vortex at a relatively early timing before the water flow flowing in from the inflow port forms the vortex.

In the present invention, the ribs are preferably formed so that the length in the front-rear direction is longer than that in the vertical direction.
In the present invention configured in this way, since the flow path between the rib and the opposing surface is formed over a predetermined length, water can be accelerated while being rectified by this flow path.

According to the water spouting device for a bathtub of the present invention, it is possible to prevent the wide spouting water from the wide spouting port from being disturbed or cracked.

It is a schematic perspective view which shows the water discharge system for a bathtub to which the water discharge device for a bathtub according to one Embodiment of this invention is applied. It is a top view which shows the water discharge system for a bathtub to which the water discharge device for a bathtub according to one Embodiment of this invention is applied. FIG. 5 is a schematic cross-sectional view schematically showing the internal structure of a bathtub water spouting system to which a bathtub water spouting device is applied, as viewed along lines III-III of FIG. It is a side view of the water discharge system for a bathtub to which the water discharge device for a bathtub according to one embodiment of the present invention is applied, viewed from the side surface in the lateral direction of the bathtub. FIG. 3 is a partially enlarged cross-sectional view showing a state in which the water discharge device main body of the water discharge device for a bathtub according to an embodiment of the present invention shown in FIG. FIG. 3 is a schematic cross-sectional view schematically showing an internal structure of a water discharge device main body as seen along the VI-VI line of FIG. 6 is a schematic cross-sectional view schematically showing an internal structure of a water discharge device main body cut along the line VII-VII of FIG. It is a perspective view which shows the state that the water is discharged from the spout while the user is sitting in the bathtub provided with the water discharge device for a bathtub according to one Embodiment of this invention. The water flowing into the storage chamber of the water discharge device main body of the water discharge device for a bathtub according to the embodiment of the present invention shown in FIG. 6 is suppressed from generating a vortex by the ribs and discharged as a flow rectified almost uniformly from the water discharge port. It is a figure which shows the state of this. As a comparative example, it is a figure which shows the state that the water which flowed into the storage chamber of the water discharge device main body of the water discharge device for a bathtub which is not provided with a rib is discharged from the water discharge port in a disordered direction.

Next, a bathtub water discharge system to which the bathtub water discharge device according to an embodiment of the present invention is applied will be described with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, the bathtub water spouting system 3 to which the bathtub water spouting device 1 according to the embodiment of the present invention is applied includes a bathtub 2 such as a bathtub, a bathroom or a bathroom of a facility or a home. .. The bathtub water discharge device 1 is arranged near the upper end of the bathtub 2. The bathtub 2 stores water as bathtub water. Here, the term "water" used in the present invention is used to mean including hot water in a temperature range in which a user using the bathtub 2 can take a bath.

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 portion 2c is formed at a height position relatively close to the upper body of the user H sitting in the bathtub and taking a bath, for example, the head, neck, or shoulder. 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 water discharge device 1 for a bathtub includes a water discharge device main body 5 that discharges the supplied water from a water discharge port 4 formed in a wide shape in the left-right direction. The spout 4 is arranged on the upper end 2c of the bathtub 2. The spout 4 is designed to spout shoulder water spouting toward the neck and shoulders of the user in a state where wide water is sitting and bathing in the left-right direction. The wide spout 4 can spout a band-shaped spout having a width about the width of the user's shoulder. The left-right direction of the spout 4 is the left-right direction with respect to the spout direction of the spout, 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 water discharge system 3 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. A pump 10 that sucks water in the bathtub 2 and pumps it downstream, a three-way valve 12 that controls the flow of water at the downstream end of the first flow path 8, and a three-way valve 12 that extends to the spout 4 side. The second flow path 14, 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 pumped from slightly below the center of the bathtub 2 in the vertical direction. A blow water discharge portion 18 that blows water into the bathtub 2, a jet pump unit 20 provided in a downstream portion of the second flow path 14, and a second intake port 22 formed on the side wall of the bathtub 2 extending to the jet pump unit 20. The four flow paths 24, the rising pipe (supply pipe) 26 extending vertically upward from the jet pump unit 20, the control unit 28 for controlling the pump 10 and the three-way valve 12, and the operation unit 30 operated by the user H. I have.

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 a pump having a function of applying pressure to the sucked water to pump it. The pump 10 sucks water and pumps water to the downstream side 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 water to the spout 4 and the supply of water to the blow spout portion 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 units 18 are provided on the vertical wall 2b on the water discharge port 4 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 close to horizontal, and discharges high-speed blow water discharged sideways from the blow water discharge unit 18. 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 H, the waist and back of the user H 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 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 H, 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.

The jet pump unit 20 includes a chamber portion 32 in which water drawn by the jet pump action is stored, and a jet nozzle 34 arranged at the downstream end of the second flow path 14. By adopting the jet pump unit 20, the bathtub water discharge device 1 can discharge a large amount of shoulder water from the water discharge port 4 by using a relatively small pump 10.

The chamber portion 32 forms a box-shaped water storage chamber, and the downstream end of the fourth flow path 24 is connected to the chamber portion 32. Since the chamber portion 32 is communicated with the bathtub 2, when water is stored in the bathtub 2, the water in the bathtub 2 is in a state of flowing into the chamber portion 32. A jet nozzle 34 is attached to the bottom of the chamber portion 32 so as to face vertically upward. On the upper surface of the chamber portion 32, an opening is formed at a position facing the jet nozzle 34, and the rising pipe 26 extends upward from this opening.

The jet nozzle 34 injects the water supplied from the pump 10 into the ascending pipe 26 through the chamber portion 32. Since the jet nozzle 34 injects water so as to pass through the chamber portion 32, it induces a jet pump action of drawing water from the inside of the chamber portion 32. The jet nozzle 34 is formed so that the diameter of the flow path inside the jet nozzle 34 is narrower than the diameter of the second flow path 14 on the upstream side of the jet nozzle 34. Therefore, the water pumped by the pump 10 is further accelerated in the jet nozzle 34 and ejected from the jet nozzle 34 as a high-speed water stream. The high-speed jet jet ejected from the jet nozzle 34 draws in water in the chamber portion 32, so that the flow rate is increased and the flow velocity is decreased.

The riser pipe 26 forms a circular tubular flow path extending vertically upward from the chamber portion 32. Water is supplied from the pump 10 via the jet pump unit 20 to the riser pipe 26, and the water supplied from the jet pump unit 20 is supplied to the spout 4.

The water in the bathtub 2 is circulated into the bathtub 2 from the spout 4 via the first flow path 8, the second flow path 14, the fourth flow path 24 extending to the jet pump unit 20, the riser pipe 26, and the like. The bathtub circulation flow path is configured. Further, a bathtub circulation flow path is also configured in which water in the bathtub 2 is circulated into the bathtub 2 from the blow water discharge unit 18 via the first flow path 8, the third flow path 16, and the like. As described above, the bathtub water discharge device 1 constitutes a bathtub circulation type water discharge device.

Next, with reference to FIGS. 5 to 7, the flow path in the vicinity of the water discharge port 4 of the water discharge device main body 5 will be described.
The water discharge device main body 5 further has a storage chamber 36 that temporarily stores the water flowing in from the inflow port 36a and expands it in the left-right direction inside itself, and a throttle flow that communicates the storage chamber 36 and the water discharge port 4. A taper forming a path 38, a groove 40 formed on the bottom surface 38a of the throttle flow path 38 and extending to the upstream side of the throttle flow path 38, and an inclined surface descending from the inlet 38b of the throttle flow path 38 toward the upstream side. A portion 42 is formed.

The tapered portion 42 is provided between the storage chamber 36 and the throttle flow path 38. The tapered portion 42 forms an inclined surface that descends toward the upstream side on the upstream side of the throttle flow path 38.

The throttle flow path 38 is formed so as to have a flow path cross-sectional area smaller than the flow path cross-sectional area of the storage chamber 36 and the tapered portion 42 so as to accelerate the inflowing water. The bottom surface 38a of the throttle flow path 38 is formed to be substantially flat. A spout 4 is formed at the downstream end of the throttle flow path 38. The spout 4 is formed in an arc shape when viewed from above.

The groove portion 40 is formed on the bottom surface of the throttle flow path 38, the tapered portion 42, and the storage chamber 36. The groove portion 40 forms a groove such that the bottom surface thereof is recessed in a U shape. The groove portion 40 continuously extends from the throttle flow path 38 to the upstream side through the tapered portion 42 to the inclined surface of the inflow port 36a of the storage chamber 36. The upstream end 40a of the groove 40 is provided on the inclined surface of the inflow port 36a of the storage chamber 36. On the other hand, the downstream end 40b of the groove 40 is provided in the throttle flow path 38 and is formed so as to terminate on the upstream side of the water discharge port 4.

Next, the storage chamber 36 will be described.
The storage chamber 36 is connected to the downstream end of the riser pipe 26, and an inflow port 36a connected to the riser pipe 26 is formed on the bottom surface 36b of the storage chamber 36.

The side wall 36e of the storage chamber 36 forms a wall surface on both the left and right ends of the storage chamber 36. The side wall 36e is formed so as to gradually curve forward from the vicinity of the rear inflow port 36a toward the water discharge port 4 on the downstream side of the front portion. In the front portion, the side wall 36e is formed so that the front side expands in the left-right direction in a top view. Here, in the front-rear direction of the water discharge device 1 for a bathtub, the water discharge port 4 side is the front side, and the inflow port 36a side is the rear side with respect to the water discharge port 4.

The storage chamber 36 is provided with ribs 44 on the downstream side of the inflow port 36a and in the vicinity of the side walls 36e on both sides of the storage chamber 36. The rib 44 is formed so as to reduce the cross-sectional area of the flow path between the ceiling surface 36d and the bottom surface 36b that projects in the vertical direction and faces the bottom surface 36b.

The storage chamber 36 forms an internal flow path that extends in the left-right direction from the upper part of the inflow port 36a, and the water is decelerated and temporarily stored in this internal flow path, and the water is spread in the left-right direction. ing. Therefore, the storage chamber 36 forms a deceleration portion 48 that spreads the water inward by decelerating the water flowing in from the inflow port 36a on the upstream side of the rib 44.

The rib 44 reduces the cross-sectional area of the flow path, accelerates the decelerated water flow again in the deceleration unit 48, and suppresses the formation of a vortex flow due to separation of the water flowing along the side wall 36e of the storage chamber 36 from the curved surface. .. The rib 44 may be formed so as to reduce the cross-sectional area of the flow path between the rib 44 and the ceiling surface 36d which projects vertically from the bottom surface 36b and faces the ceiling surface 36d.

The rib 44 is formed so as to project convexly in the front-rear cross section of the storage chamber 36. The rib 44 extends in the left-right direction in the storage chamber 36, and is formed so as to cross the storage chamber 36 in the left-right direction from the side walls 36e on both sides of the storage chamber 36. The tip end portion 44a, which is the lower end portion of the rib 44, and the bottom surface 36b facing the rib 44 are formed substantially parallel to each other in the left-right direction of the storage chamber 36. Therefore, the size of the flow path in the gap between the tip portion 44a of the rib 44 and the bottom surface 36b is formed to be a constant size in the left-right direction. The constant size is a size in which the difference is within 2 mm. Since the cross-sectional area of the flow path between the rib 44 and the bottom surface 36b of the storage chamber 36 is narrowed substantially uniformly in the left-right direction, water is accelerated almost uniformly forward in the left-right direction.
When the rib 44 is formed so as to project vertically from the bottom surface 36b, the size of the flow path in the gap between the tip portion 44a of the rib 44 and the ceiling surface 36d facing the rib 44 is left and right. It is formed to a certain size in the direction.

The rib 44 is formed so that the length of the rib 44 in the front-rear direction is longer than that in the vertical direction of the rib 44. The flow path in the gap between the tip portion 44a of the rib 44 and the bottom surface 36b forms a flow path having a constant width over a length in the range of 10 mm to 20 mm in the front-rear direction, for example. Since the flow path between the rib 44 and the bottom surface 36b is formed over a predetermined length in this way, water can be accelerated while being rectified by this flow path.

Since the rib 44 may be formed in the region near the side walls 36e on both sides in the storage chamber 36, the rib 44 may be formed only in the region near the side wall 36e. That is, the rib 44 may be configured so as not to be formed in the central region. At this time, the rib 44 forms a convex portion in the left and right side regions excluding the central region of the whole extending so as to cross the side wall 36e.

The upstream end 44b of the rib 44 is arranged at a position closer to the inflow port 36a than the inlet 38b of the throttle flow path 38. Upstream of the rib 44 so that the distance between the inflow port 36a of the storage chamber 36 and the end 44b of the rib 44 is smaller than the distance between the inlet 38b of the throttle flow path 38 and the end 44b of the rib 44. The side end 44b is arranged. The upstream end 44b of the rib 44 is arranged at a position near the downstream end 36c of the inflow port 36a in the cross section in the front-rear direction.

The rib 44 is arranged so as to be separated from the throttle flow path 38 on the downstream side thereof, and has a re-deceleration section 52 (expanded space section) that decelerates the water flow accelerated by the rib 44 again before flowing into the throttle flow path 38. Is forming. Therefore, the re-deceleration unit 52 is provided between the rib 44 and the throttle flow path 38, that is, on the downstream side of the rib 44 and on the upstream side of the throttle flow path 38 in the water discharge device main body 5. The re-deceleration portion 52 is provided between the rib 44 and the taper portion 42, but may also include an upper region of the taper portion 42. The re-deceleration portion 52 is formed so that the height between the ceiling surface 52a and the bottom surface 36b of the re-deceleration portion 52 is higher than the height between the tip portion 44a and the bottom surface 36b of the rib 44. Therefore, the re-deceleration unit 52 has a flow path cross-sectional area larger than the flow path cross-sectional area between the rib 44 and the bottom surface 36b. The re-deceleration unit 52 forms a flow path extending in the vertical direction and the horizontal direction from the rib 44 on the downstream side of the rib 44, and the water is decelerated again in this flow path and a vortex is formed. It is designed to spread water in the left-right direction while suppressing it.

Next, a state (operation) in which water is discharged from the water discharge port 4 by the water discharge device 1 for a bathtub will be described with reference to FIGS. 8 and 9. The pump 10 sucks the water in the bathtub 2 from the first flow path 8 and pumps it to the second flow path 14 on the downstream side. The water is supplied to the jet nozzle 34 from the second flow path 14, and the hot water injected from the jet nozzle 34 rises the ascending pipe 26 while drawing in the water in the chamber portion 32 by the jet pump action, and is stored from the inflow port 36a. It flows into the chamber 36.

As shown in FIG. 9, the water that has flowed into the storage chamber 36 from the inflow port 36a flows into the deceleration unit 48. As shown by the arrow F1, the water is decelerated at the deceleration unit 48 and flows so as to spread in the left-right direction. The water that has been decelerated and spread in the left-right direction flows into the rib 44 and the bottom surface 36b before forming a vortex by peeling from the curved surface of the side wall 36e. At this time, since the cross-sectional area of the flow path between the rib 44 and the bottom surface 36b of the storage chamber 36 is narrowed, water is accelerated as shown by the arrow F2. Since F2 flows under the rib 44, it is indicated by a dotted line. At this time, since the cross-sectional area of the flow path between the rib 44 and the bottom surface 36b is narrowed substantially uniformly in the left-right direction, water is accelerated substantially uniformly at any position in the left-right direction. At this time, the rib 44 accelerates while maintaining the vector of each water flow. Therefore, it is possible to suppress the formation of a vortex flow due to the acceleration of water, and it is possible to form a flow that is rectified substantially uniformly in the left-right direction.

The water that has passed through the rib 44 flows into the re-deceleration unit 52. As shown by the arrow F3, the water is decelerated at the re-deceleration unit 52 and flows so as to further spread in the left-right direction. As shown by the arrow F3, the water in the re-deceleration unit 52 is suppressed from being disturbed to the extent that it forms a vortex, and the flow can be maintained substantially uniformly rectified at any position in the left-right direction. ..

The water spread in the left-right direction in the re-deceleration section 52 is accelerated again in the taper section 42 and the throttle flow path 38 as shown by the arrow F4. Therefore, as shown by the arrow F5, the water is discharged from the spout 4 while maintaining a substantially uniformly rectified flow when the water flows in. As shown by the arrow F5, the water is discharged in a wide shape from the spout 4 as a flow that is rectified substantially uniformly at any position in the left-right direction.

As shown in FIG. 8, the water spouted in a wide shape from the spout 4 flows downward in a parabola in the air as a stable strip-shaped (water film-like) flowing water flow having a substantially constant width and thickness. .. Therefore, when the user H takes a sitting posture in the bathtub 2, the water discharged from the spout 4 hits a wide range of the upper body such as the neck and shoulders substantially uniformly. The water hit in this way flows from the shoulder to the front side (chest side) of the user H and / or from the shoulder to the back side (back side) of the user H. Therefore, it is possible to warm not only the neck and shoulders but also the chest, abdomen, back and waist for the user who is taking a half-body bath.

Next, with reference to FIG. 10, as a comparative example, a state (operation) in which water is discharged from the water discharge port 104 in the water discharge device 101 for a bathtub not provided with ribs will be described.
The water supplied from the pump flows into the storage chamber 136 from the inflow port 136a. The water that has flowed into the storage chamber 136 from the inflow port 136a flows into the deceleration unit 148. As shown by the arrow F11, the water is decelerated at the deceleration unit 148 and flows so as to spread in the left-right direction. Since the speed reducing portion 148 continues to substantially the inlet of the tapered portion 142, the water is further decelerated and further spreads in the left-right direction. As shown by the arrow F12, the water further spread in the left-right direction is decelerated as it spreads in the front side and the left-right direction side, and is separated from the curved surface of the side wall 136e to form a turbulent or vortex flow. .. Therefore, in the vicinity of the inlet of the tapered portion 142 and the throttle flow path 138, as shown by the arrow F13, a flow that is rectified substantially uniformly in the left-right direction is not formed, and the direction of the water flow differs depending on the position. There is.

The water that has reached the vicinity of the inlet of the tapered portion 142 and the throttle flow path 138 is accelerated again in the taper portion 142 and the throttle flow path 138 as shown by the arrow F13. Water is accelerated while maintaining the direction of flow when it reaches these. Therefore, as shown by the arrow F14, the water discharged from the water discharge port 104 is discharged in a different direction for each position in the left-right direction, and the water discharged from the water discharge port 104 is disturbed such as bias and cracking.

According to the water discharge device 1 for a bathtub according to the embodiment of the present invention described above, the rib 44 is located between the bottom surface 36b or the surface facing the ceiling surface 36d in the vicinity of the side walls 36e on both sides in the storage chamber 36. It is formed so as to reduce the cross-sectional area of the flow path of. The rib 44 can re-accelerate the decelerated water flow flowing into the storage chamber 36 and suppress the formation of a vortex flow due to separation of the water flowing along the curved side wall 36e from the side wall 36e. Therefore, it is possible to prevent the wide spout from the wide spout 4 from being disturbed or cracked.
Further, for example, the length of the storage chamber 36 in the front-rear direction is not substantially changed from the conventional method, and the length of the water discharge device 1 for bathtub 1 in the front-rear direction is relatively suppressed, and the water flowing along the curved side wall 36e is relatively suppressed. The formation of a vortex due to peeling from the side wall can be suppressed.

Further, according to the water discharge device 1 for a bathtub according to an embodiment of the present invention, the flow path of the gap between the rib 44 and the bottom surface 36b or the ceiling surface 36d facing the rib 44 has a constant size in the left-right direction. It is formed in the ceiling. Therefore, the acceleration of the water flow can be made constant in the left-right direction. Therefore, it is possible to prevent the wide spout from the wide spout 4 from being disturbed or cracked.

Further, according to the water discharge device 1 for a bathtub according to an embodiment of the present invention, the re-deceleration unit 52 has a flow path cross-sectional area larger than the flow path cross-sectional area between the rib 44 and the surface facing the rib 44. The re-deceleration unit 52 can decelerate the water flow accelerated by the ribs 44 again before flowing into the flow path 38, and the water can be spread again. Therefore, the water can be distributed to the left and right in the storage chamber 36 in a state where the formation of the vortex is suppressed. Therefore, it is possible to more reliably discharge the wide water from the spout 4, and it is possible to prevent the wide water from the spout 4 from being disturbed or cracked.

Further, according to the bathtub water discharge device 1 according to the embodiment of the present invention, the ribs 44 are formed so as to cross the storage chamber 36 in the left-right direction from the side walls 36e on both sides of the storage chamber 36. Therefore, as compared with the case where the rib 44 is formed only in the region near the side walls 36e on both sides in the storage chamber 36, it is possible to prevent the formation of a vortex in the water flowing in the region near the center of the storage chamber 36. be able to.

Further, according to the bathtub water discharge device 1 according to the embodiment of the present invention, the upstream end 44b of the rib 44 is arranged at a position closer to the inflow port 36a than the inlet 38b of the throttle flow path 38. Therefore, the water flow that has flowed into the storage chamber 36 and has been decelerated can be accelerated by passing through a region where the cross-sectional area of the flow path between the rib 44 and the bottom surface 36b facing the rib 44 is reduced at a relatively early stage. Therefore, it is possible to accelerate the water flow and suppress the formation of the vortex at a relatively early timing before the water flow flowing into the storage chamber 36 from the inflow port 36a forms the vortex.

Further, according to the bathtub water discharge device 1 according to the embodiment of the present invention, since the flow path between the rib 44 and the bottom surface 36b is formed over a predetermined length, the water flow path accelerates while rectifying the water. can do.

1 Water discharge device for bathtub 2 Bathtub 2a Bottom 2b Vertical wall 2c Upper end 2d Side wall 3 Water discharge system for bathtub 5 Water discharge port 5 Water discharge device main body 6 First water intake port 8 First flow path 10 Pump 12 Three-way valve 14 Second flow path 16 3rd flow path 18 Blow water discharge unit 20 Jet pump unit 22 2nd intake port 24 4th flow path 26 Rise pipe 28 Control unit 30 Operation unit 32 Chamber unit 34 Jet nozzle 36 Storage chamber 36a Inflow port 36b Bottom surface 36c Downstream end 36d Ceiling Surface 36e Side wall 38 Squeezing flow path 38a Bottom surface 38b Inlet 40 Groove 40a Upstream end 40b Downstream end 42 Tapered part 44 Rib 44a Tip part 44b End part 48 Deceleration part 52 Re-deceleration part 52a Ceiling surface 101 Water spouting device for bathtub 104 Water spouting port 105 Equipment body 136 Storage chamber 136a Inflow port 136e Side wall 138 Squeezing flow path 142 Tapered part 148 Deceleration part F1 Arrow F2 Arrow F3 Arrow F4 Arrow F5 Arrow F11 Arrow F12 Arrow F13 Arrow F14 Arrow H User

Claims (6)

A water spouting device for bathtubs that is installed in a bathtub and spouts wide water.
Equipped with a water spouting device body that discharges the supplied water from a spouting port formed in a wide shape in the left-right direction.
The water spouting device body
A storage chamber that temporarily stores the water that flows in from the inflow port that connects to the supply pipe and expands it in the left-right direction.
A throttle flow path formed so as to have a flow path cross-sectional area smaller than the flow path cross-sectional area of the storage chamber so as to communicate the storage chamber and the spout and accelerate the water flowing in from the storage chamber. When,
Is formed,
The side wall of the storage chamber is curved from the vicinity of the inflow port toward the spout.
In the above storage room
Ribs are provided on the downstream side of the inflow port and in the vicinity of the side walls on both sides of the storage chamber, and the ribs are formed so as to reduce the cross-sectional area of the flow path between the bottom surface or the ceiling surface and the facing surfaces. The water flow that has been decelerated by flowing into the storage chamber is accelerated again, and the formation of a vortex due to the separation of the water flowing along the side wall of the storage chamber from the side wall is suppressed. apparatus. The water discharge device for a bathtub according to claim 1, wherein the flow path of the gap between the rib and the bottom surface or the ceiling surface facing the rib is formed to have a constant size in the left-right direction. In the water discharge device main body, an enlarged space portion having a flow path cross-sectional area larger than the flow path cross-sectional area between the rib and the surface facing the rib is formed between the rib and the throttle flow path. The water discharge device for a bathtub according to claim 1 or 2. The water discharge device for a bathtub according to any one of claims 1 to 3, wherein the rib is formed so as to cross the storage chamber in the left-right direction from the side walls on both sides of the storage chamber. The water discharge device for a bathtub according to any one of claims 1 to 4, wherein the end portion on the upstream side of the rib is arranged at a position closer to the inflow port than the inlet of the throttle flow path. The water discharge device for a bathtub according to any one of claims 1 to 5, wherein the rib is formed so that the length in the front-rear direction is longer than that in the vertical direction.

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