JP7069515B2 - Water spouting device for bathtub - Google Patents

Description

The present invention relates to a water discharge device for a bathtub, and more particularly to a water discharge device for a bathtub, which is installed in a bathtub and discharges wide water in the left-right direction toward the vicinity of a user's shoulder.

Conventionally, for example, as described in Patent Document 1, a water discharge device installed in a bathtub and circulating water in the bathtub to discharge wide water toward the shoulder, neck, etc. of the user has been used. Are known. In such a water discharge device, the water in the bathtub is pumped by a water supply pump, the water raised through the headrace flows into the storage chamber from the inflow port, and the water flowing into the storage chamber is added in the storage chamber. It is compressed and flows so as to spread toward the inlet of the throttle flow path, and the water pressure causes water to be discharged from the discharge port through the throttle flow path. In such a water discharge device, the bottom surface of the storage chamber and the throttle flow path is formed with a downward gradient toward the inlet of the storage chamber, so that the water in the water discharge device is discharged from the inlet to the upstream side after the water discharge is completed. It has become.

Japanese Unexamined Patent Publication No. 2016-7360

However, in the water discharge device as described above, since the throttle flow path is narrowed in the vertical direction as compared with the storage chamber, the surface tension acts strongly on the water in the throttle flow path. Therefore, there is a problem that after the water discharge is completed, the strong surface tension makes it difficult for water to be discharged from the drawn flow path, and residual water is generated in the drawn flow path. Such residual water is discharged from the spout because the cold residual water is discharged to the user at the start of the next water discharge, which causes discomfort, and the scale generated by the residual water adheres to the throttle flow path. There is a problem that the water is broken and a relatively uniform wide discharge cannot be realized.

Therefore, the present invention can suppress the generation of residual water in the throttle flow path, and the cold residual water is discharged to the user at the start of the next water discharge, which causes discomfort, and is caused by the residual water. It is an object of the present invention to provide a water discharge device for a bathtub that can prevent the water discharged from the water discharge port from cracking due to the scale adhering to the throttle flow path and making it impossible to realize a relatively uniform wide water discharge. ..

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 in the left-right direction toward the vicinity of the user's shoulder, and supplies water in the left-right direction. The water discharge device main body is provided with a water discharge device main body formed in a wide shape, and the water discharge device main body has a storage chamber for temporarily storing water flowing in from an inlet connected to a supply pipe, and a storage chamber. A throttle flow path provided between the water outlet and the water discharge port and 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 accelerate the water flowing in from the storage chamber. The groove formed on the bottom surface of the throttle flow path and extending to the upstream side of the throttle flow path, and the water accumulated in the groove portion in the throttle flow path after the water discharge is stopped are stronger than the surface tension of the accumulated water. By the pulling force to the upstream side, a pulling force generating means for pulling to the upstream side along the groove is formed, and the pulling force generating means is inclined to descend toward the upstream side on the upstream side from the throttle flow path. It is characterized by having a surface .
In the present invention configured as described above, the pulling force generating means collects the water accumulated in the groove portion in the throttle flow path and the water accumulated in the vicinity region of the groove portion connected to the accumulated water in the throttle flow path after the water discharge is stopped. Due to the pulling force to the upstream side that is stronger than the surface tension of the accumulated water, it can be pulled to the upstream side along the groove. Therefore, since the surface tension becomes relatively large, water that tends to collect in the throttle flow path can be drawn upstream from the throttle flow path along the groove portion, and can be easily discharged downward from the inlet of the storage chamber. Therefore, it is possible to suppress the generation of residual water in the throttle flow path, the cold residual water is discharged to the user at the start of the next water discharge, which causes discomfort, and the scale generated by the residual water is throttled. It is possible to prevent the water discharged from the spout from being cracked due to adhering to the inside of the road and making it impossible to realize a relatively uniform wide water discharge.

In the present invention, preferably, the pulling force generating means is formed so as to extend the groove portion onto the inclined surface.
In the present invention configured as described above, the groove portion formed on the inclined surface is opposed to the water accumulated in the groove portion in the throttle flow path and the water accumulated in the vicinity region of the groove portion connected to the accumulated water. Due to the pulling force to the upstream side, which is stronger than the surface tension of the accumulated water, these accumulated waters can be drawn to the upstream side along the groove.

In the present invention, preferably, the water discharge device main body is further formed with a tapered portion forming the inclined surface that descends toward the upstream side from the inlet of the throttle flow path, and the groove portion is formed from the tapered portion. It extends to the bottom surface of the storage chamber on the upstream side, and the inclination angle of the groove portion in the storage chamber is smaller than the inclination angle of the groove portion in the tapered portion.
In the present invention configured as described above, since the inclination angle of the groove portion in the storage chamber on the upstream side of the tapered portion is made smaller, the flow velocity of the water flowing down from the groove portion of the tapered portion is set in the groove portion of the storage chamber. It is decreasing. Therefore, by slightly reducing the flow velocity of water, it is possible to make the flow of water passing through the groove less likely to be interrupted, and it is possible to further improve the discharge performance of residual water from the throttle flow path.

In the present invention, the groove preferably extends to the inclined surface of the inlet of the storage chamber.
In the present invention configured as described above, since the groove portion extends to the inclined surface of the inlet of the storage chamber, it is possible to prevent the flow of water drawn to the inclined surface of the inlet through the groove portion from being interrupted. , It is possible to discharge more reliably to the inclined surface of the inlet of the storage chamber.

In the present invention, preferably, the width of the groove portion in the tapered portion is formed to be equal to or smaller than the width of the groove portion in the throttle flow path.
In the present invention configured as described above, the water in the groove portion in the throttle flow path is pulled into the groove portion in the tapered portion which is not defeated by the surface tension of the water in the groove portion, and the groove portion in the tapered portion is drawn. Can be pulled in. Therefore, it is possible to easily guide the water in the groove portion in the throttle flow path to be drawn into the groove portion in the tapered portion on the upstream side along the groove portion. Further, it is possible to make it difficult for the flow of water drawn from the throttle flow path to the tapered portion on the upstream side through the groove portion to be interrupted.

In the present invention, preferably, the width of the groove portion in the throttle flow path is formed to be equal to or less than the height of the throttle flow path.
In the present invention configured as described above, the water accumulated in the region near the groove portion in the throttle flow path can be drawn into the groove portion by the pulling force into the groove portion that is not defeated by the surface tension of the accumulated water. can. Therefore, it is possible to easily guide the water accumulated in the region near the groove portion in the throttle flow path to be drawn upstream from the throttle flow path along the groove portion. In addition, it is possible to make it difficult for the flow of water drawn into the groove portion from the region near the groove portion in the throttle flow path to be interrupted.

In the present invention, preferably, the width of the groove portion in the storage chamber is formed to be equal to or smaller than the width of the groove portion in the tapered portion.
In the present invention configured as described above, the water in the groove portion in the tapered portion is drawn into the groove portion of the storage chamber by the pulling force of the surface tension into the groove portion of the storage chamber, which is not defeated by the surface tension of the water in the groove portion. Can be pulled into. Therefore, it is possible to easily guide the water in the groove portion in the tapered portion to be drawn into the groove portion on the upstream side along the groove portion. Further, it is possible to make it difficult for the flow of water drawn from the tapered portion to the upstream side of the tapered portion through the groove portion to be interrupted.

In the present invention, preferably, the inflow port is formed on the left-right center side of the storage chamber, and the groove portion extends in the left-right direction in the first region on the left-right center side of the throttle flow path, and the above-mentioned groove portion is formed. The second region on both the left and right ends of the throttle flow path is formed so as to extend in the left-right direction and the water discharge direction .
In the present invention configured as described above, the first region on the left and right center side of the throttle flow path is relatively close to the inlet of the storage chamber. Therefore, after the water discharge is stopped, the water in the storage chamber is drained from the inflow port to the rising pipe, and the water in the first region is relatively strongly drawn into the inflow port side. Therefore, the number of grooves in the first region can be relatively reduced, the turbulence of water discharged from the water discharge port due to the provision of the grooves can be suppressed, and the water in the first region in the throttle flow path can be efficiently discharged. On the other hand, the second region on both the left and right ends of the throttle flow path is relatively far from the inlet of the storage chamber. Therefore, when the water in the storage chamber is drained from the inflow port to the rising pipe after the water discharge is stopped, the force of drawing the water in the second region to the inflow port side is weaker than in the first region. At this time, since the number of grooves in the second region is larger than the number of grooves in the first region, it is easy to draw water that tends to collect in the second region from the second region to the upstream side along the grooves. And the water in the second region can be discharged efficiently. Therefore, it is possible to suppress the generation of residual water throughout the throttle flow path.

In the present invention, the groove portion is preferably formed so as to extend from the second region of the throttle flow path to the upstream side of the throttle flow path.
In the present invention configured as described above, the groove portion extending from the first region of the throttle flow path to the upstream side of the throttle flow path is eliminated, and the groove portion extending to the upstream side only from the second region is provided. Therefore, while suppressing the disturbance of the water discharge from the first region on the left and right center side, the residual water in the throttle flow path is removed by using the second region on the left and right end sides, which has a relatively small effect on the disturbance of the water discharge. Can be discharged.

In the present invention, preferably, the groove portion further includes a portion extending so as to cross in the left-right direction between the groove portions of the second region on the left and right end sides.
In the present invention configured as described above, the groove portion extending in the left-right direction across the groove portion of the second region causes the remaining portion in the throttle flow path in the first region and the second region between the second regions. Water can be discharged more reliably.

In the present invention, preferably, the downstream end of the groove portion is provided in the throttle flow path.
In the present invention configured as described above, since the downstream end of the groove portion is provided in the throttle flow path and does not extend to the spout port, it is possible to prevent the spout from the spout port from being discharged along the groove portion. It is possible to prevent the water spouting from the spouting port from being biased or disturbed and making it impossible to realize a relatively uniform wide water spouting.

According to the water discharge device for a bathtub of the present invention, it is possible to suppress the generation of residual water in the throttle flow path, and the cold residual water is discharged to the user at the start of the next water discharge, which causes discomfort. In addition, it is possible to prevent the scale generated by the residual water from adhering to the inside of the throttle flow path, so that the water discharged from the spout is cracked and a relatively uniform wide water discharge cannot be realized.

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 bathtub water discharge system to which the bathtub water discharge device by one Embodiment of this invention is applied. FIG. 3 is a schematic cross-sectional view schematically showing the internal structure of a bathtub water discharge system to which a bathtub water discharge device is applied, as viewed along the line 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 the embodiment of the present invention shown in FIG. 3 is enlarged and the left and right sides of the paper surface are inverted. By cutting out a part from the spout to the storage chamber while the portion near the spout of the spouting device main body of the water spouting device for a bathtub according to the embodiment of the present invention is viewed from diagonally above, the throttle flow path, the groove, and the taper are formed. It is a schematic perspective view which shows the flow path in the part and the storage chamber. FIG. 3 is a schematic cross-sectional view schematically showing an internal structure of a water discharge device main body as seen along the line VII-VII of FIG. FIG. 3 is a schematic cross-sectional view schematically showing the internal structure of the water discharge device main body of the water discharge device for a bathtub cut along the line VIII-VIII of FIG. 7. FIG. 5 is a diagram illustrating an image in which a groove portion extends from a throttle flow path to a storage chamber through a tapered portion in a water discharge device for a bathtub according to an embodiment of the present invention shown in FIG. It is a figure explaining the relationship of the width of the throttle flow path, the taper part, and the groove part of a storage chamber in the water discharge device for a bathtub according to one Embodiment of this invention. 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.

Next, a bathtub water discharge system to which the bathtub water discharge device according to the 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 discharge system 3 to which the bathtub water discharge device 1 according to the embodiment of the present invention is applied includes a bathtub 2 such as a facility, a home bath, a bathroom, or a bathroom. .. 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 the user using the bathtub 2 can take a bath.

The bathtub 2 is connected to the bottom 2a to which the buttocks or feet of the bathing user are in contact, the vertical wall 2b to 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 is provided with 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 who is sitting in the bathtub and taking a bath, for example, the head, the neck, or the 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 water from the shoulder water toward the neck and shoulders of the user who is sitting and bathing in wide water 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 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 pump 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 tub 2 in the vertical direction. A blow water discharge portion 18 that blows water into the second flow path 14, 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 are provided. 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 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 supply water to the spout 4 and / or either of the blow spouting 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 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 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 by 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 in accordance with 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 transmitted 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 operation 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 communicates 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 flow. 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. The riser pipe 26 is adapted to supply water from the pump 10 via the jet pump unit 20 and supply the water supplied from the jet pump unit 20 to the spout port 4.

The water in the bathtub 2 is circulated in 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. A 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 portion 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 10, a flow path in the vicinity of the spout 4 of the bathtub spout main body 5 will be described.
The water discharge main body 5 for a bathtub is further provided between a storage chamber 36 that temporarily stores water flowing in from the inflow port 36a and expands it into its own internal space, and between the storage chamber 36 and the spout port 4. A throttle flow path 38 that communicates the storage chamber 36 and the water discharge port 4, a groove portion 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 inlet 38b of the throttle flow path 38. A tapered portion 42 forming an inclined surface descending from the upstream side is formed.

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 inflow port 36a is formed in the left-right central region on the left-right center side of the storage chamber 36. The storage chamber 36 forms an internal space that extends in the left-right direction from the upper part of the inflow port 36a, and temporarily stores water in this internal space and spreads the water in the left-right direction. The storage chamber 36 is formed with ribs 44 protruding downward from the ceiling surface thereof. The rib 44 extends in the left-right direction in the storage chamber 36. Since the flow path between the lower end of the rib 44 and the bottom surface 36b of the storage chamber 36 is narrowed, water is accelerated. The inflow port 36a of the storage chamber 36 forms an inclined surface descending toward the upstream side on the upstream side of the throttle flow path 38 (see FIG. 5).

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 inclined surface of the tapered portion 42 and the inclined surface of the inlet 36a of the storage chamber 36 are due to an inclined surface having an inclination angle between 3 ° and 90 °, preferably an inclined surface having an inclination angle between 3 ° and 40 °. It is formed.

The throttle flow path 38 is formed so as to have a flow path cross section smaller than the flow path cross section 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.

Next, the groove portion 40 and the pulling force generating means will be described.
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. The groove portion 40 may extend from at least the throttle flow path 38 to a part of the tapered portion 42. On the other hand, the downstream end 40b of the groove portion 40 is provided in the throttle flow path 38 and is formed so as to terminate on the upstream side of the spout port 4.

As shown in FIG. 5, the inclination angle α1 of the groove portion 40 in the storage chamber 36 is formed to be smaller than the inclination angle α2 of the groove portion 40 in the tapered portion 42.
As shown in FIG. 10, the width W1 of the groove portion 40 in the throttle flow path 38 is set to be equal to or lower than the height H1 of the throttle flow path 38 (see FIG. 9), more preferably smaller than the height H1. Further, as shown in FIG. 10, the width W2 of the groove portion 40 in the tapered portion 42 is set to be equal to or less than the width W1 of the groove portion 40 in the throttle flow path 38, more preferably smaller than the width W1. The width W3 of the groove 40 in the storage chamber 36 is set to be equal to or less than the width W2 of the groove 40 in the tapered portion 42, more preferably smaller than the width W2. The depth of the groove 40 is formed to be substantially the same as the width W1 of the groove 40.

As shown in FIG. 7, the groove portion 40 is formed so that the number of the groove portions 40 in the second region A2 on the left and right end sides is larger than the number of the groove portions 40 in the first region A1 on the left and right center side of the throttle flow path 38. ing. Further, the number of groove portions 40 extending in the water discharge direction in the second region A2 of the throttle flow path 38 is larger than the number of groove portions 40 extending in the water discharge direction in the first region A1. The number of groove portions 40 extending in the water discharge direction in the first region A1 is preferably 0.

The groove portion 40 is formed so that the groove portion 40 extending in the water discharge direction is formed along the side wall of the throttle flow path 38, the tapered portion 42, and the storage chamber 36. Therefore, the groove portion 40 is formed so as to extend from the second region A2 on both the left and right ends of the throttle flow path 38 to the taper portion 42 and the storage chamber 36 on the upstream side of the throttle flow path 38. The groove portion 40 further includes a crossing portion 40c extending so as to traverse between the groove portions 40 of the second region A2 on the left and right end sides in the left-right direction. Therefore, the groove portion 40 extending in the left-right direction is also formed in the first region A1.

Further, in the water discharge main body 5 for the bathtub, after the water discharge is stopped, the water accumulated in the groove 40 in the throttle flow path 38 and the water accumulated in the vicinity region of the groove 40 connected to the accumulated water are collected. Due to the pulling force to the upstream side stronger than the surface tension of the water, a pulling force generating means for pulling the accumulated water to the upstream side along the groove 40 is formed. Such a pulling force generating means has an inclined surface of the tapered portion 42 descending toward the upstream side on the upstream side of the throttle flow path 38 and / or an inclined surface of the inflow port 36a of the storage chamber 36, and has a groove portion 40. It is formed so as to extend onto the inclined surface. The force of water that tries to flow down along the slope in the groove 40 becomes a relatively strong pulling force to the upstream side, and generates a pulling force that pulls the accumulated water to the upstream side along the groove 40. By increasing the pulling force, it is possible to make the flow of water drawn along the groove 40 less likely to be interrupted. It should be noted that the groove portion 40 may be terminated near or in the middle of the entrance of such an inclined surface, and a force for drawing in water may be generated by the inclination of the inclined surface of the portion where the groove portion 40 is almost eliminated.

Further, the width W1 of the groove portion 40 in the throttle flow path 38 is formed to be equal to or less than the height H1 of the throttle flow path 38. Further, the width W2 of the groove portion 40 in the tapered portion 42 is the width W1 of the groove portion 40 in the throttle flow path 38. It is formed below. Further, the width W3 of the groove portion 40 in the storage chamber 36 is formed to be equal to or less than the width W2 of the groove portion 40 in the tapered portion 42. By narrowing the width in this way, it is possible to generate a pulling force to the upstream side due to the difference in surface tension. With such a structure, the magnitude of the pulling force of the pulling force generating means can be further improved.

Next, a state (operation) in which water is discharged from the water discharge port 4 by the water discharge device 1 for the bathtub will be described with reference to FIG. 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 sprayed from the jet nozzle 34 rises in the ascending pipe 26 while drawing 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. The water flowing into the storage chamber 36 passes through the tapered portion 42 and the throttle flow path 38, and is discharged from the spout port 4.

At this time, as shown in FIG. 11, the water spouted in a wide shape from the spout 4 draws a parabola in the air as a stream of stable strip-shaped (water film-like) flowing water having a substantially constant width and thickness downward. Flow down to. 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 almost 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, as shown in FIGS. 4 to 10, a state (operation) after the water discharge from the water discharge port 4 by the bathtub water discharge device 1 is stopped will be described. The arrow C in FIGS. 7 and 9 describes how water flows in the groove 40 toward the upstream side. Further, in FIG. 9, in the bathtub water discharge device shown in FIG. 5, the groove portion 40 is formed along the bottom surface from the throttle flow path 38 through the tapered portion 42 to the storage chamber 36 on the inner side of the paper surface. It is shown by.
When the user H operates the operation unit 30 to select to stop the water discharge from the water discharge port 4, the control unit 28 stops the pump 10. When the water discharge from the water discharge port 4 is stopped, the water in the throttle flow path 38, the tapered portion 42 and the storage chamber 36 is discharged from the water discharge port 4 or from the inflow port 36a of the storage chamber 36 to the rising pipe 26 side. Will flow down to. When the water discharge from the water discharge port 4 is stopped, when the water is still filled in the throttle flow path 38, the tapered portion 42, and the storage chamber 36, when the water is discharged from the bathtub 2. These waters flow down from the inflow port 36a of the storage chamber 36 to the rising pipe 26 side.

At this time, as shown in FIG. 7, the pull-in force generating means forms the groove portion 40 formed on the inclined surface of the tapered portion 42 or the inclined surface of the inflow port 36a of the storage chamber 36. The groove 40 is a water B1 (see FIGS. 7 and 9) accumulated in the groove 40 in the throttle flow path 38 and a water B2 (see FIGS. 7 and 9) collected in a region near the groove 40 connected to the accumulated water. ) Is pulled upstream along the groove 40 as shown by arrow C (see FIGS. 7 and 9) by a pulling force to the upstream side stronger than the surface tension of these accumulated waters. A wide range of water B2 can be drawn together with water B1 by the intramolecular force of water. Further, since the width W1 of the groove portion 40 in the throttle flow path 38 is formed to be equal to or less than the height H1 of the throttle flow path 38, this is relative to the water B2 accumulated in the vicinity region of the groove portion 40 in the throttle flow path 38. The accumulated water B2 is drawn into the groove 40 by the pulling force into the groove 40 which is not defeated by the surface tension of the accumulated water B2. Here, the surface tension of the water B2 accumulated in the throttle flow path 38 is mainly determined according to the height H1 of the throttle flow path 38, and the pulling force into the groove portion 40 is mainly the width W1 of the groove portion 40. It is determined by the surface tension of water in the groove 40 determined by.

Further, since the width W2 of the groove 40 in the tapered portion 42 is formed to be equal to or less than the width W1 of the groove 40 in the throttle flow path 38, the water in the groove 40 is compared with the water in the groove 40 in the throttle flow path 38. The water in the groove 40 in the throttle flow path 38 is drawn into the groove 40 in the tapered portion 42 by the pulling force of the surface tension into the groove 40 in the tapered portion 42 which is not defeated by the surface tension of. Further, since the width W3 of the groove 40 in the storage chamber 36 is formed to be equal to or less than the width W2 of the groove 40 in the tapered portion 42, the surface of the water in the groove 40 is opposed to the water in the groove 40 in the tapered portion 42. Due to the pulling force of the surface tension into the groove 40 of the storage chamber 36 that does not lose the tension, the water in the groove 40 in the tapered portion 42 is drawn into the groove 40 of the storage chamber 36 on the upstream side of the tapered portion 42.

When water flows along the groove portion 40, the inclination angle of the groove portion 40 in the storage chamber 36 on the upstream side of the taper portion 42 is made smaller, so that the flow velocity of the water flowing down from the groove portion 40 of the taper portion 42 is set in the storage chamber. It is lowered in the groove 40 of 36. Therefore, by slightly reducing the flow velocity of the water, it is possible to make the flow of water passing through the groove 40 less likely to be interrupted, and it is possible to prevent the flow of drawing the residual water in the throttle flow path 38 from being interrupted.

As described above, since the surface tension in the throttle flow path 38 becomes relatively large, water that tends to collect in the throttle flow path 38 can be drawn from the inside of the throttle flow path 38 to the upstream side along the groove portion 40. Water is drawn from the throttle flow path 38 through the tapered portion 42 to the inclined surface of the inflow port 36a of the storage chamber 36 along the groove portion 40, and flows down from the inflow port 36a into the ascending pipe 26. Water remaining in a wide area around the groove 40 in the throttle flow path 38 can be discharged to the rising pipe 26 through the groove 40.

According to the water discharge device 1 for a bathtub according to the above-described embodiment of the present invention, after the water discharge is stopped, the water B1 accumulated in the groove 40 in the throttle flow path 38 and the groove 40 connected to the accumulated water are connected. The water B2 accumulated in the vicinity region of the water can be drawn upstream along the groove 40 by a pulling force to the upstream side stronger than the surface tension of these accumulated waters. Therefore, since the surface tension becomes relatively large, water that tends to collect in the throttle flow path 38 can be drawn upstream from the inside of the throttle flow path 38 along the groove portion 40, and downward from the inflow port 36a of the storage chamber 36. It becomes easy to discharge. Therefore, it is possible to suppress the generation of residual water in the throttle flow path 38, the cold residual water is discharged to the user at the start of the next water discharge, which causes discomfort, and the scale generated by the residual water is throttled. It is possible to prevent the water discharged from the water discharge port 4 from cracking due to adhering to the inside of the flow path 38 and making it impossible to realize a relatively uniform wide water discharge.

Further, according to the water discharge device 1 for a bathtub according to the embodiment of the present invention, the groove portion 40 formed on the inclined surface is connected to the water B1 accumulated in the groove portion 40 in the throttle flow path 38 and the accumulated water. With respect to the water B2 accumulated in the vicinity region of 40, the accumulated water can be drawn upstream along the groove 40 by the pulling force to the upstream side stronger than the surface tension of the accumulated water.

Further, according to the bathtub water discharge device 1 according to the embodiment of the present invention, the inclination angle of the groove portion 40 in the storage chamber 36 on the upstream side of the tapered portion 42 is made smaller, so that the water discharge device 1 flows down from the groove portion 40 of the tapered portion 42. The flow velocity of the water is reduced in the groove 40 of the storage chamber 36. Therefore, by slightly reducing the flow velocity of water, it is possible to make the flow of water passing through the groove 40 less likely to be interrupted, and it is possible to further improve the discharge performance of residual water from the throttle flow path 38.

Further, according to the bathtub water discharge device 1 according to the embodiment of the present invention, since the groove 40 extends to the inclined surface of the inflow port 36a of the storage chamber 36, it extends to the inclined surface of the inflow port 36a through the groove 40. It is possible to make the flow of the drawn water less likely to be interrupted, and it is possible to more reliably discharge the water to the inclined surface of the inflow port 36a of the storage chamber 36.

Further, according to the water discharge device 1 for a bathtub according to an embodiment of the present invention, the water B2 accumulated in the region near the groove 40 in the throttle flow path 38 is brought into the groove 40 which is not defeated by the surface tension of the accumulated water. It can be pulled into the groove 40 by the pulling force of. Therefore, it is possible to easily guide the water B2 accumulated in the region near the groove portion 40 in the throttle flow path 38 to be drawn upstream from the inside of the throttle flow path 38 along the groove portion 40. In addition, it is possible to make it difficult for the flow of water drawn into the groove 40 from the region near the groove 40 in the throttle flow path 38 to be interrupted.

Further, according to the water discharge device 1 for a bathtub according to the embodiment of the present invention, the water in the groove 40 in the throttle flow path 38 is brought into the groove 40 in the tapered portion 42 which is not defeated by the surface tension of the water in the groove 40. By the pulling force of the surface tension of, it can be pulled into the groove 40 in the tapered portion 42. Therefore, it is possible to easily guide the water in the groove portion 40 in the throttle flow path 38 to be drawn into the groove portion 40 in the tapered portion 42 on the upstream side along the groove portion 40. Further, it is possible to prevent the flow of water drawn from the throttle flow path 38 into the tapered portion 42 on the upstream side through the groove portion 40 from being interrupted.

Further, according to the water discharge device 1 for a bathtub according to the embodiment of the present invention, the water in the groove 40 in the tapered portion 42 is introduced into the groove 40 of the storage chamber 36 which does not lose the surface tension of the water in the groove 40. It can be pulled into the groove 40 of the storage chamber 36 by the pulling force of the surface tension. Therefore, the water in the groove portion 40 in the tapered portion 42 can be easily guided to be drawn into the groove portion 40 on the upstream side along the groove portion 40. Further, it is possible to make it difficult for the flow of water drawn from the tapered portion 42 to the upstream side of the tapered portion 42 through the groove portion 40 to be interrupted.

Further, according to the bathtub water discharge device 1 according to the embodiment of the present invention, the first region A1 on the left and right center side of the throttle flow path 38 is relatively close to the inflow port 36a of the storage chamber 36. Therefore, after the water discharge is stopped, the water in the storage chamber 36 is drained from the inflow port 36a to the rising pipe, and the water in the first region A1 is relatively strongly drawn into the inflow port 36a side. Therefore, the number of grooves 40 in the first region A1 is relatively small, the turbulence of the water discharged from the water discharge port 4 due to the provision of the grooves 40 is suppressed, and the water in the first region A1 in the throttle flow path 38 is efficiently used. Can be discharged well. On the other hand, the second region A2 on both the left and right ends of the throttle flow path 38 is relatively far from the inflow port 36a of the storage chamber 36. Therefore, when the water in the storage chamber 36 is drained from the inflow port 36a to the rising pipe 26 after the water discharge is stopped, the force with which the water in the second region A2 is drawn toward the inflow port 36a becomes weaker than in the first region A1. ing. At this time, since the number of the groove portions 40 in the second region A2 is larger than the number of the groove portions 40 in the first region A1, water that tends to collect in the second region A2 is collected from the second region A2 along the groove portions 40. It can be easily drawn to the upstream side, and the water in the second region A2 can be efficiently discharged. Therefore, it is possible to suppress the generation of residual water throughout the throttle flow path 38.

Further, according to the bathtub water discharge device 1 according to the embodiment of the present invention, the groove portion 40 extending from the first region A1 of the throttle flow path 38 to the upstream side of the throttle flow path 38 is eliminated, and only upstream from the second region A2. A groove 40 extending to the side is provided. Therefore, the second region A2 on both left and right ends, which suppresses the disturbance of the water discharge from the first region A1 on the left and right center side and has a relatively small influence on the disturbance of the water discharge, is used in the throttle flow path 38. Residual water can be discharged.

Further, according to the bathtub water discharge device 1 according to the embodiment of the present invention, the first region between the second regions A2 is provided by the groove 40 extending so as to cross between the grooves 40 of the second region A2 in the left-right direction. In A1 and the second region A2, the residual water in the throttle flow path 38 can be discharged more reliably.

Further, according to the bathtub water discharge device 1 according to the embodiment of the present invention, the downstream end 40b of the groove 40 is provided in the throttle flow path 38 and does not extend to the water discharge port 4, so that water is discharged from the water discharge port 4. It is possible to prevent the water from being discharged along the groove 40, and to prevent the water discharged from the water discharge port 4 from being biased or disturbed and making it impossible to realize a relatively uniform wide water discharge.

1 Bathtub water discharge device 2 Bathtub 2a Bottom 2b Vertical wall 2c Upper end 2d Side wall 3 Bathtub water discharge system 4 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 Rising pipe 28 Control unit 30 Operation unit 32 Chamber unit 34 Jet nozzle 36 Storage chamber 36a Inflow port 36b Bottom surface 38 Squeeze flow path 38a Bottom surface 38b Inlet 40 Groove 40a Upstream end 40b Downstream end 40c Crossing part 42 Tapered part 44 Rib A1 First area A2 Second area α1 Tilt angle α2 Tilt angle H User W1 Width W2 Width W3 Width

Claims (10)

It is a water discharge device for bathtubs that is installed in the bathtub and discharges wide water in the left-right direction toward the user's shoulders.
Equipped with a spouting device body that spouts the supplied water from a spout port formed in a wide shape in the left-right direction.
On the main body of the water discharge device,
A storage room that temporarily stores the water that has flowed in from the inflow port that connects to the supply pipe,
A diaphragm provided between the storage chamber and the spout and formed so as to have a flow path cross section smaller than the flow path cross section of the storage chamber so as to accelerate the water flowing in from the storage chamber. Channel and
A groove formed on the bottom surface of the throttle flow path and extending to the upstream side of the throttle flow path,
After the water discharge is stopped, the water accumulated in the groove in the throttle flow path is attracted to the upstream side along the groove by the pulling force to the upstream side stronger than the surface tension of the accumulated water. , Is formed,
The pulling force generating means has an inclined surface that descends toward the upstream side on the upstream side of the throttle flow path, and is characterized in that the groove portion is formed so as to extend onto the inclined surface. Device. The water discharge device main body is further formed with a tapered portion forming the inclined surface that descends toward the upstream side from the inlet of the throttle flow path.
The groove portion extends to the bottom surface of the storage chamber on the upstream side of the tapered portion.
The water discharge device for a bathtub according to claim 1 , wherein the inclination angle of the groove portion in the storage chamber is smaller than the inclination angle of the groove portion in the tapered portion. The water discharge device for a bathtub according to claim 2 , wherein the groove portion extends to the inclined surface of the inflow port of the storage chamber. The water discharge device for a bathtub according to claim 2 or 3 , wherein the width of the groove portion in the tapered portion is formed to be equal to or less than the width of the groove portion in the throttle flow path. The water discharge device for a bathtub according to any one of claims 2 to 4, wherein the width of the groove portion in the storage chamber is formed to be equal to or less than the width of the groove portion in the tapered portion. The water discharge device for a bathtub according to any one of claims 1 to 5, wherein the width of the groove portion in the throttle flow path is formed below the height of the throttle flow path. The inlet is formed on the left and right center sides of the storage chamber.
The groove portion is formed so as to extend in the left-right direction in the first region on the left and right center side of the throttle flow path, and extend in the left-right direction and the water discharge direction in the second region on the left and right end sides of the throttle flow path. The water discharge device for a bath according to any one of claims 1 to 6 . The water discharge device for a bathtub according to claim 7 , wherein the groove portion is formed so as to extend from the second region of the throttle flow path to the upstream side of the throttle flow path. The water discharge device for a bathtub according to claim 8 , wherein the groove portion further includes a portion extending in the left-right direction between the groove portions of the second region on both left and right ends. The water discharge device for a bathtub according to any one of claims 1 to 9 , wherein the downstream end of the groove is provided in the throttle flow path.

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