JP2019013515A - Bathtub water discharge device - Google Patents

Abstract

To provide a bathtub water discharge device capable of inhibiting residual water from being generated in a throttling flow path.SOLUTION: A drain valve operation device 1, a bathtub water discharge device that is provided at a bathtub and makes laterally wide water be discharged toward around a user's shoulder, comprises: an ascension pipe 26; a storage chamber 36; a water discharge port 4 in a laterally wide shape for laterally discharging wide water; a throttling flow path 38 that is provided between the storage chamber and the water discharge port and is formed so as to have flow passage cross-sectional area smaller than that of the storage chamber so that water flowing in from the storage chamber is accelerated; a groove part 40 that is formed on a bottom surface of the throttling flow path and extends to the upstream side more than the throttling flow path; and drawing-in force generation means for drawing in residual water in the groove part in the throttling flow path, along the groove part to the upstream side using drawing-in force to the upstream side stronger than surface tension of the residual water.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a water discharge device for a bathtub, and more particularly, to a water discharge device for a bathtub that is installed in a bathtub and discharges water that is wide 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 that is installed in a bathtub and circulates water in the bathtub to discharge wide water toward a user's shoulder, neck, or the like. Are known. In such a water discharge device, the water in the bathtub is pumped by the water supply pump, the water that has risen through the water conduit flows into the storage chamber from the inlet, and the water that flows into the storage chamber is added in the storage chamber. The water is compressed and flows toward the inlet of the throttle channel, and the water pressure causes water to be discharged from the discharge port through the throttle channel. Such a water discharge device is configured to discharge water in the water discharge device from the inflow port to the upstream side after the end of water discharge by forming the bottom surface of the storage chamber and the throttle channel in a downward slope toward the inflow port of the storage chamber. It has become.

Japanese Patent Laid-Open No. 2006-7360

  However, in the water discharging apparatus as described above, since the throttle channel is narrowed in the vertical direction as compared with the storage chamber, surface tension acts strongly on the water in the throttle channel. Therefore, there is a problem that after the water discharge is finished, water is not easily discharged from the throttle channel due to the strong surface tension, and residual water is generated in the throttle channel. Such residual water is discharged from the water outlet when the cold residual water is discharged to the user at the start of the next discharge and the scale generated by the residual water adheres to the throttle channel. There is a problem that the water that breaks down breaks down and a relatively uniform wide water discharge cannot be realized.

  Therefore, the present invention can suppress the occurrence of residual water in the throttle channel, causing the cold residual water to be discharged to the user at the start of the next water discharge, causing discomfort, and resulting from the residual water. It aims at providing the water discharging apparatus for bathtubs which can suppress that the water discharged from a water outlet breaks because a scale adheres in a restricting channel, and it becomes impossible to realize comparatively uniform wide water discharging. .

In order to achieve the above object, the present invention provides a water discharge device for a bathtub that is installed in a bathtub and discharges wide water in the left-right direction toward the vicinity of the shoulder of the user, and the supplied water is left-right. A water discharge device main body for discharging water from a water discharge port formed in a wide shape, and the water discharge device main body includes a storage chamber for temporarily storing water flowing in from an inlet connected to a supply pipe, and the storage chamber And a throttle channel formed so as to have a channel cross-sectional area smaller than the channel cross-sectional area of the storage chamber, so as to accelerate water flowing in from the storage chamber. A groove formed on the bottom surface of the throttle channel and extending to the upstream side of the throttle channel; and water accumulated in the groove in the throttle channel after stopping water discharge is stronger than the surface tension of the accumulated water Due to the upstream pulling force, the groove A drawing force generating unit to pull on the upstream side along, is characterized in that is formed.
In the present invention configured as described above, the drawing-in force generating means causes the water accumulated in the groove portion in the throttle channel and the water accumulated in the region near the groove portion connected to the accumulated water after stopping water discharge to The upstream pulling force stronger than the surface tension of the accumulated water can be pulled upstream along the groove. Accordingly, since the surface tension becomes relatively large, water that tends to be accumulated in the throttle channel can be drawn upstream from the throttle channel along the groove, 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 discharge, and the scale caused by the residual water is reduced. It can suppress that the water discharged from a water outlet breaks by adhering in a road, and it becomes impossible to implement | achieve a comparatively uniform wide water discharge.

In the present invention, preferably, the pulling force generating means has an inclined surface that descends toward the upstream side upstream from the throttle channel, and the groove portion is formed to extend to the inclined surface.
In the present invention configured as described above, the groove formed on the inclined surface is less than the water accumulated in the groove in the throttle channel and the water accumulated in the vicinity of the groove connected to the accumulated water. Due to the upstream pulling force stronger than the surface tension of the accumulated water, the accumulated water can be drawn upstream along the groove.

In the present invention, preferably, the water discharge device main body is further formed with a tapered portion that forms the inclined surface that descends from the inlet of the throttle channel toward the upstream side, and the groove portion is formed from the tapered portion. It extends to the bottom surface of the upstream storage chamber, 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 upstream from the taper portion is made smaller, the flow rate of water flowing down from the groove portion of the taper portion is reduced in the groove portion of the storage chamber. It is decreasing. Therefore, by slightly reducing the flow rate of water, it is possible to make it difficult to interrupt the flow of water through the groove, and it is possible to further improve the performance of discharging residual water from the throttle channel.

In the present invention, preferably, the groove portion 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 inflow port of the storage chamber, the flow of water drawn to the inclined surface of the inflow port through the groove portion can be hardly interrupted. Further, it is possible to discharge more reliably up to the inclined surface of the inlet of the storage chamber.

In the present invention, preferably, the width of the groove portion in the throttle channel is formed to be equal to or less than the height of the throttle channel.
In the present invention configured as described above, the water accumulated in the vicinity of the groove portion in the throttle channel can be drawn into the groove portion by the drawing force into the groove portion that does not lose the surface tension of the accumulated water. it can. Accordingly, it is possible to easily guide the water accumulated in the region near the groove in the throttle channel so as to be drawn from the throttle channel along the groove to the upstream side. Further, it is possible to make it difficult to interrupt the flow of water drawn into the groove portion from the vicinity of the groove portion in the throttle channel.

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 channel.
In the present invention configured as described above, the water in the groove portion in the throttle channel is caused to flow into the groove portion in the tapered portion by the pulling force of the surface tension into the groove portion in the tapered portion that does not lose the surface tension of the water in the groove portion. Can be pulled in. Therefore, it is possible to easily guide the water in the groove portion in the throttle channel so as to be drawn into the groove portion in the upstream tapered portion along the groove portion. Further, it is possible to make it difficult to interrupt the flow of water drawn from the throttle channel to the upstream tapered portion via the groove.

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 of the tapered portion is caused to flow into the groove portion of the storage chamber by the pulling force of the surface tension into the groove portion of the storage chamber that does not lose the surface tension of water in the groove portion. Can be drawn into. Accordingly, it is possible to easily guide the water in the groove portion in the tapered portion to be drawn into the upstream groove portion along the groove portion. Further, it is possible to make it difficult to interrupt the flow of water drawn from the tapered portion to the upstream side of the tapered portion via the groove portion.

In the present invention, preferably, the inflow port is formed on the left and right center side of the storage chamber, and the groove portion is located on both the left and right ends of the first region on the left and right center side of the throttle channel. The number of the groove portions in the two regions is increased.
In the present invention configured as described above, the first region on the left and right center side of the throttle channel 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 inlet to the ascending pipe, and the water in the first region is relatively strongly drawn to the inlet. Therefore, the number of the groove portions in the first region can be relatively reduced, the disturbance of the water discharged from the water discharge port due to the provision of the groove portions can be suppressed, and the water in the first region in the throttle channel can be efficiently discharged. On the other hand, the second regions on the left and right ends of the throttle channel are relatively far from the inflow port of the storage chamber. Therefore, when the water in the storage chamber is drained from the inflow port to the ascending pipe after the water discharge is stopped, the force with which the water in the second region is drawn to the inflow port side is weaker than in the first region. At this time, since the number of the groove portions in the second region is larger than the number of the groove portions in the first region, water that tends to accumulate in the second region is easily drawn upstream from the second region along the groove portion. The water in the second region can be discharged efficiently. Therefore, it is possible to suppress the occurrence of residual water throughout the throttle channel.

In the present invention, preferably, the groove portion is formed so as to extend only from the second region of the throttle channel to the upstream side of the throttle channel.
In the present invention configured as described above, the groove extending from the first region of the throttle channel to the upstream side of the throttle channel is eliminated, and the groove extending only upstream from the second region is provided. Therefore, while suppressing the water discharge from the 1st area | region of the right-and-left center side being disturbed, the 2nd area | region of the both right and left sides with comparatively little influence on the disturbance of water discharge is utilized, and the remaining water in a throttle flow path is 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 remaining groove in the throttle channel in the first region and the second region between the second regions is formed by the groove portions extending in the left-right direction between the groove portions in the second region. Water can be discharged more reliably.

In the present invention, preferably, the downstream end of the groove is provided in the throttle channel.
In the present invention configured as described above, the downstream end of the groove portion is provided in the throttle channel and does not extend to the water discharge port, so that water discharged from the water discharge port is prevented from being discharged along the groove portion. And it can suppress that the water discharge from a water discharge port is biased or disordered, and cannot implement | achieve comparatively uniform wide water discharge.

  According to the water discharge device for bathtubs of the present invention, it is possible to suppress the occurrence of residual water in the throttle channel, and the cold residual water is discharged to the user at the start of the next water discharge, giving discomfort. And it can suppress that the water discharged from a spout breaks | disconnects the scale produced by residual water in a throttle flow path, and it becomes impossible to implement | achieve a comparatively uniform wide water discharge.

It is a schematic perspective view which shows the water discharging system for bathtubs to which the water discharging apparatus for bathtubs by one Embodiment of this invention is applied. It is a top view which shows the water discharging system for bathtubs to which the water discharging apparatus for bathtubs by one Embodiment of this invention is applied. It is a schematic sectional drawing which shows roughly the internal structure of the water discharging system for bathtubs to which the water discharging apparatus for bathtubs seen along the III-III line of FIG. 2 is applied. It is the side view which looked at the water discharging system for bathtubs to which the water discharging apparatus for bathtubs by one Embodiment of this invention is applied from the side surface of the transversal direction of a bathtub. FIG. 4 is a partial enlarged cross-sectional view showing a water discharge device main body of the water discharge device for bathtubs according to the embodiment of the present invention shown in FIG. In a state in which the portion near the water discharge port of the water discharge device main body of the water discharge device for a bathtub according to an embodiment of the present invention is viewed obliquely from above, a portion from the water discharge port to the storage chamber is cut out, thereby reducing the throttle channel, groove, and taper. It is a schematic perspective view which shows the flow path inside a part and a storage chamber. It is a schematic sectional drawing which shows roughly the internal structure of the water discharging apparatus main body seen along the VII-VII line of FIG. It is a schematic sectional drawing which shows schematically the internal structure of the water discharging apparatus main body of the water discharging apparatus for bathtubs cut along the VIII-VIII line of FIG. It is a figure explaining the image in which a groove part extends from a throttle flow path to a storage chamber in the water discharging apparatus for bathtubs by one Embodiment of this invention shown in FIG. In the water discharging apparatus for bathtubs by one Embodiment of this invention, it is a figure explaining the relationship of the width | variety of a throttle flow path, a taper part, and the groove part of a storage chamber. It is a perspective view which shows a mode that the water discharge from the water discharge port is performed in the state in which the user is sitting in the bathtub provided with the water discharging apparatus for bathtubs by one Embodiment of this invention.

Next, a bathtub water discharge system to which a 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, a bathtub water discharge system 3 to which a bathtub water discharge apparatus 1 according to an embodiment of the present invention is applied includes a bathtub 2 such as a facility, a bathhouse at home, a bathroom, or a bathroom. . The bathtub water discharge device 1 is disposed in the vicinity of 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 include 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 where the buttocks or feet of the bathing user are in contact, the vertical wall 2b where the back of the bathing user is in contact, and the top of the vertical wall 2b, and the upper surface of the bathtub 2 is And an upper end 2c to be formed. The upper end 2c is formed at a height that is relatively close to the upper half 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) that can supply hot water into the bathtub 2 from an external water supply source and a hot water supply device.

  The water discharge apparatus 1 for bathtubs is provided with the water discharge apparatus main body 5 which discharges the supplied water from the water discharge port 4 formed in the wide shape in the left-right direction. The water outlet 4 is disposed on the upper end 2 c of the bathtub 2. The spout 4 performs shoulder bath water discharge that discharges water near the neck and shoulders of the user who is taking a bath while sitting in wide water in the left-right direction. The wide-shaped water discharge port 4 can discharge the belt-shaped water discharge having a width about the shoulder width of the user. The left-right direction of the water discharge port 4 is the left-right direction with respect to the water discharge direction of the water discharge port, and is the left-right direction of the vertical wall 2b with which the user's back of the bathtub 2 contacts.

  As shown in FIGS. 3 and 4, the water discharge system 3 for the bathtub is further provided on the first flow path 8 and the first flow path 8 extending from the first water intake 6 formed in the side wall 2 d of the bathtub 2. And 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 extends from the three-way valve 12 to the spout 4 side. The second flow path 14, the third flow path 16 extending separately from the second flow path 14 from the three-way valve 12, and the water supplied from the third flow path 16 from the bottom in the vertical direction of the bathtub 2 from slightly below. 2 and the jet pump unit 20 provided in the downstream part of the 2nd flow path 14, and the 2nd water intake 22 formed in the side wall of the bathtub 2 are extended to the jet pump unit 20. 4 channels 24 and vertically upward from the jet pump unit 20 A riser (supply tube) 26 extending, a control unit 28 for controlling the pump 10 and the three-way valve 12, an operation unit 30 that the user H is operated, the.

  The first flow path 8 forms a flow path extending from the first water intake 6 to the three-way valve 12 via the pump 10. The pump 10 is a pump having a function of applying pressure to sucked water and pumping it. The pump 10 sucks water with a rotation of an impeller (not shown) directly connected to an electrically driven electric motor (not shown) and pumps the water downstream. 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 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 simultaneously opened, the three-way valve 12 can freely change the flow rate distribution ratio. The three-way valve 12 is electrically connected to the control unit 28 and is electrically controlled to be opened and closed by the control unit 28. The three-way valve 12 can selectively execute both or any one of water supply to the water discharge port 4 and water supply to the blow water discharge unit 18.

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

  Two blow water spouting portions 18 are provided in the vertical wall 2 b on the water discharge port 4 side of the bathtub 2. The blow water spouting portion 18 is formed so that the diameter of the flow path inside thereof is narrower than the diameter of the flow path on the upstream side. The blow water spouting unit 18 is attached in a horizontal direction close to the horizontal, and discharges high-speed blow water spouting from the blow water spouting unit 18 in the horizontal direction. The blow water spouting unit 18 directly ejects the water flow pumped from the pump 10 through the third flow path 16. Therefore, the blow water spouting unit 18 forms a relatively small flow rate and high speed water discharging flow corresponding to the amount of pumping water pumped by the pump 10. When the blown water discharged from the blown 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 a 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 electrical signals to each other, and can electrically operate the above-described parts. . The control unit 28 receives each operation signal from the operation unit 30 or controls each device according to a stored program. The control unit 28 includes a storage device (not shown) such as a memory and an arithmetic device (not shown) that can appropriately control the water discharge device 1 for bathtubs. The control unit 28 is attached to the back side of a bathroom wall (not shown).

  The operation unit 30 is an operation unit such as an operation panel that can perform an operation desired by the user H, and is attached to a wall surface in the bathroom. Information on the operation of the operation unit 30 by the user H is sent from the operation unit 30 to the control unit 28 by an electrical 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 disposed at the downstream end of the second flow path 14. By adopting the jet pump unit 20, the bathtub water discharge device 1 can perform a large flow of shoulder water discharge from the water discharge port 4 using a relatively small pump 10.

  The chamber part 32 forms a box-shaped water storage chamber, and the downstream end of the fourth flow path 24 is connected to the chamber part 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 flows into the chamber portion 32. A jet nozzle 34 is attached to the bottom portion of the chamber portion 32 in a vertically upward direction. 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 the opening.

  The jet nozzle 34 injects 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 that draws water from the chamber portion 32. The jet nozzle 34 is formed so that the diameter of the flow path inside thereof 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 flow ejected from the jet nozzle 34 is increased in flow rate and reduced in flow rate by drawing water in the chamber portion 32.

  The ascending pipe 26 forms a circular channel extending vertically upward from the chamber portion 32. The ascending pipe 26 is supplied with water from the pump 10 via the jet pump unit 20 and supplies the water supplied from the jet pump unit 20 to the water outlet 4.

  The water in the bathtub 2 is circulated from the water outlet 4 into the bathtub 2 through the first flow path 8, the second flow path 14, the fourth flow path 24 extending to the jet pump unit 20, the rising pipe 26, and the like. A bathtub circulation channel is configured. Moreover, the bathtub circulation flow path in which the water in the bathtub 2 is circulated in the bathtub 2 from the blow water discharging part 18 via the 1st flow path 8, the 3rd flow path 16, etc. is also comprised. Thus, the bathtub water discharging apparatus 1 comprises the bathtub circulation type water discharging apparatus.

Next, with reference to FIG. 5 thru | or FIG. 10, the flow path of the water discharge port 4 vicinity of the water discharge main body 5 for bathtubs is demonstrated.
The water discharge main body 5 for the bathtub is further provided between the storage chamber 36 and the water discharge port 4 for temporarily storing the water flowing in from the inflow port 36a and spreading the water into its own internal space. In addition, a throttle channel 38 that allows the storage chamber 36 and the water discharge port 4 to communicate with each other, a groove portion 40 that is formed on the bottom surface 38a of the throttle channel 38 and extends to the upstream side of the throttle channel 38, and an inlet 38b of the throttle channel 38 And a tapered portion 42 that forms an inclined surface that descends toward the upstream side.

  The storage chamber 36 is connected to the downstream end of the rising pipe 26, and an inflow port 36 a connected to the rising pipe 26 is formed on the bottom surface 36 b of the storage chamber 36. The inflow port 36 a is formed in the left and right center region on the left and 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 portion of the inflow port 36a. The storage chamber 36 temporarily stores water in the internal space and spreads the water in the left-right direction. The storage chamber 36 is formed with ribs 44 that protrude downward from the ceiling surface. 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 that descends toward the upstream side upstream of the throttle channel 38 (see FIG. 5).

  The tapered portion 42 is provided between the storage chamber 36 and the throttle channel 38. The taper portion 42 forms an inclined surface that descends toward the upstream side on the upstream side of the throttle channel 38. The inclined surface of the tapered portion 42 and the inclined surface of the inflow port 36a of the storage chamber 36 are inclined surfaces having an inclination angle of 3 ° to 90 °, preferably, inclined surfaces having an inclination angle of 3 ° to 40 °. Is formed.

  The throttle channel 38 is formed to have a channel cross-sectional area smaller than the channel cross-sectional areas of the storage chamber 36 and the tapered portion 42 so as to accelerate the water that has flowed in. The bottom surface 38a of the throttle channel 38 is formed substantially flat. A water discharge port 4 is formed at the downstream end of the throttle channel 38. The water discharge port 4 is formed in an arc shape when viewed from above.

Next, the groove 40 and the pulling force generating means will be described.
The groove portion 40 is formed on the bottom surface of the throttle channel 38, the tapered portion 42 and the storage chamber 36. The groove part 40 forms a groove that allows these bottom surfaces to be recessed in a U shape. The groove portion 40 continuously extends from the throttle channel 38 to the inclined surface of the inflow port 36a of the storage chamber 36 through the tapered portion 42 on the upstream side. The upstream end 40 a of the groove 40 is provided on the inclined surface of the inlet 36 a of the storage chamber 36. In addition, the groove part 40 should just extend to at least a part of the taper part 42 from the throttle channel 38. On the other hand, the downstream end 40 b of the groove portion 40 is provided in the throttle channel 38 and is formed so as to terminate upstream from the water discharge port 4.

As shown in FIG. 5, the inclination angle α <b> 1 of the groove portion 40 in the storage chamber 36 is formed to be smaller than the inclination angle α <b> 2 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 channel 38 is set to be equal to or less than the height H1 (see FIG. 9) of the throttle channel 38, and more preferably smaller than the height H1. Furthermore, 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 smaller than the width W1 of the groove portion 40 in the throttle channel 38, and more preferably smaller than the width W1. The width W3 of the groove portion 40 in the storage chamber 36 is set to be equal to or smaller than the width W2 of the groove portion 40 in the tapered portion 42, and more preferably smaller than the width W2. In addition, the depth of the groove part 40 is formed substantially the same as the width W1 of the groove part 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 A <b> 2 on the left and right ends is larger than the number of the groove portions 40 in the first region A <b> 1 on the left and right center side of the throttle channel 38. ing. Further, the number of the groove portions 40 extending in the water discharge direction in the second region A2 of the throttle channel 38 is made larger than the number of the groove portions 40 extending in the water discharge direction in the first region A1. The number of the groove portions 40 extending in the water discharge direction in the first region A1 is preferably zero.

  The groove portion 40 is formed such that the groove portion 40 extending in the water discharge direction is along the throttle channel 38, the tapered portion 42, and the side walls of the storage chamber 36. Therefore, the groove 40 is formed so as to extend only from the second region A2 on both the left and right ends of the throttle channel 38 to the tapered portion 42 and the storage chamber 36 on the upstream side of the throttle channel 38. The groove portion 40 further includes a transverse portion 40c extending so as to cross 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 40 extending in the left-right direction is also formed in the first region A1.

  The water discharge main body 5 for the bathtub further includes water collected in the groove 40 in the throttle channel 38 and water collected in the vicinity of the groove 40 connected to the accumulated water after the water discharge is stopped. A drawing force generating means for drawing these accumulated water to the upstream side along the groove 40 is formed by a drawing force to the upstream side that is stronger than the surface tension of the groove. Such a pulling force generating means has an inclined surface of the tapered portion 42 and / or an inclined surface of the inflow port 36a of the storage chamber 36 that descends toward the upstream side upstream of the throttle channel 38, and the groove portion 40. It forms so that it may extend even on the said inclined surface. The force of the water that tries to flow down along the inclination in the groove portion 40 becomes a relatively strong pulling force toward the upstream side, and a pulling force that draws the accumulated water along the groove portion 40 to the upstream side is generated. By increasing the pulling force, the flow of water drawn along the groove 40 can be made difficult to be interrupted. The groove 40 may be terminated near or in the middle of the entrance of such an inclined surface, and a force for drawing water may be generated by the inclination of the inclined surface where the groove 40 is substantially eliminated.

  The width W1 of the groove 40 in the throttle channel 38 is formed to be equal to or less than the height H1 of the throttle channel 38. Further, the width W2 of the groove 40 in the tapered channel 42 is the width W1 of the groove 40 in the throttle channel 38. Formed below. Further, the width W3 of the groove portion 40 in the storage chamber 36 is formed to be equal to or smaller 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 an upstream pulling force due to a 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 bathtub water discharge device 1 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. Water is supplied from the second flow path 14 to the jet nozzle 34, and hot water sprayed from the jet nozzle 34 ascends the ascending pipe 26 while drawing water in the chamber portion 32 by a jet pump action, and is stored from the inlet 36a. It flows into the chamber 36. The water flowing into the storage chamber 36 passes through the tapered portion 42 and the throttle channel 38 and is discharged from the water discharge port 4.

  At this time, as shown in FIG. 11, the water discharged in a wide shape from the water discharge port 4 draws a parabola in the air as a flow of a strip-like (water film-like) flowing water having a substantially constant width and thickness. To flow down. Therefore, when the user H takes a posture of sitting in the bathtub 2, the water discharged from the water outlet 4 almost uniformly hits a wide range of the upper body such as the neck and shoulders. The water hit in this way flows so as to spread from the shoulder to the front side (chest side) of the user H and / or flows so as to spread from the shoulder to the back side (back side) of the user H. Therefore, not only the neck and shoulders but also the chest, abdomen, back and waist can be warmed for the user 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 water discharge device 1 for a bathtub is stopped will be described. The arrow C in FIG.7 and FIG.9 has demonstrated a mode that water flows in the groove part 40 toward an upstream. Further, in FIG. 9, in the water discharge device for a bathtub shown in FIG. 5, a broken line indicates an image in which the groove portion 40 is formed along the bottom surface from the throttle channel 38 through the tapered portion 42 to the storage chamber 36 on the back side of the drawing. It shows by.
When the user H operates the operation unit 30 to select the stop of 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 channel 38, the tapered portion 42 and the storage chamber 36 is discharged from the water discharge port 4 or from the inlet 36a of the storage chamber 36 to the rising pipe 26 side. Will flow down. When water discharge from the water discharge port 4 is stopped, when water is filled in the throttle channel 38, the tapered portion 42 and the storage chamber 36, when water is discharged from the bathtub 2, These waters flow down from the inlet 36a of the storage chamber 36 to the ascending pipe 26 side.

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

  Further, since the width W2 of the groove portion 40 in the tapered portion 42 is formed to be equal to or less than the width W1 of the groove portion 40 in the throttle channel 38, the water in the groove portion 40 in the water in the groove portion 40 in the throttle channel 38 is reduced. The water in the groove part 40 in the throttle channel 38 is drawn into the groove part 40 in the taper part 42 by the pulling force of the surface tension into the groove part 40 in the taper part 42 that does not lose the surface tension. Furthermore, since 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, the surface of the water in the groove portion 40 with respect to the water in the groove portion 40 in the tapered portion 42. Due to the pulling force of the surface tension into the groove portion 40 of the storage chamber 36 that does not lose the tension, the water in the groove portion 40 in the tapered portion 42 is drawn into the groove portion 40 of the storage chamber 36 upstream of the taper portion 42.

  When the 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 the flow rate of water flowing down from the groove portion 40 of the taper portion 42 is changed to the storage chamber. In 36 groove portions 40, the height is lowered. Therefore, by slightly reducing the flow rate of water, it is possible to make it difficult for the water flow through the groove portion 40 to be interrupted, and it is possible to prevent the flow of drawing the remaining water in the throttle channel 38 from being interrupted.

  In this way, since the surface tension in the throttle channel 38 becomes relatively large, water that tends to accumulate in the throttle channel 38 can be drawn upstream from the throttle channel 38 along the groove 40. Water is drawn along the groove 40 from the throttle channel 38 through the tapered portion 42 to the inclined surface of the inlet 36a of the storage chamber 36, and flows down into the ascending pipe 26 from the inlet 36a. Water remaining in a wide area around the groove 40 in the throttle channel 38 can be discharged to the ascending pipe 26 through the groove 40.

  According to the water discharging apparatus 1 for a bathtub according to the above-described embodiment of the present invention, the pulling force generating means is configured so that the water B1 accumulated in the groove 40 in the throttle channel 38 and the groove 40 connected to the accumulated water after the water discharge is stopped. The water B2 accumulated in the vicinity region of the water can be drawn upstream along the groove portion 40 by an upstream drawing force stronger than the surface tension of the accumulated water. Accordingly, since the surface tension becomes relatively large, water that tends to accumulate in the throttle channel 38 can be drawn upstream from the throttle channel 38 along the groove portion 40, and downward from the inlet 36 a of the storage chamber 36. It becomes easy to discharge. Therefore, it is possible to suppress the generation of residual water in the throttle channel 38, the cold residual water is discharged to the user at the start of the next discharge, and the scale generated by the residual water is throttled. By adhering to the inside of the flow path 38, it is possible to prevent the water discharged from the water discharge port 4 from being broken and making it impossible to realize a relatively uniform wide water discharge.

  Moreover, according to the water discharging apparatus 1 for bathtubs by one Embodiment of this invention, the groove part 40 formed on the inclined surface is the groove part which connects the water B1 which accumulated in the groove part 40 in the throttle channel 38, and this accumulated water. With respect to the water B2 accumulated in the vicinity of 40, the collected water can be drawn upstream along the groove portion 40 by the upstream drawing force stronger than the surface tension of the accumulated water.

  Furthermore, according to the water discharging apparatus 1 for a bathtub according to one embodiment of the present invention, the inclination angle of the groove portion 40 in the storage chamber 36 upstream of the taper portion 42 is made smaller, so that it flows down from the groove portion 40 of the taper portion 42. The flow rate of the water to be reduced is decreased in the groove portion 40 of the storage chamber 36. Therefore, by slightly reducing the flow rate of water, it is possible to make it difficult for the water flow through the groove portion 40 to be interrupted, and it is possible to further improve the performance of discharging the remaining water from the throttle channel 38.

  Furthermore, according to the water discharging apparatus 1 for a bathtub according to the embodiment of the present invention, the groove portion 40 extends to the inclined surface of the inflow port 36a of the storage chamber 36. Therefore, the groove portion 40 extends to the inclined surface of the inflow port 36a. The flow of the drawn water can be made difficult to be interrupted, and can be more reliably discharged to the inclined surface of the inlet 36a of the storage chamber 36.

  Furthermore, according to the water discharge apparatus 1 for bathtubs by one Embodiment of this invention, the water B2 collected in the vicinity area | region of the groove part 40 in the throttle channel 38 is put into the groove part 40 which does not lose the surface tension of this accumulated water. It can be pulled into the groove 40 by the pulling force. Therefore, it is possible to easily guide the water B2 accumulated in the region near the groove 40 in the throttle channel 38 so as to be drawn upstream from the throttle channel 38 along the groove 40. In addition, the flow of water drawn into the groove 40 from the vicinity of the groove 40 in the throttle channel 38 can be made difficult to be interrupted.

  Furthermore, according to the water discharge device 1 for a bathtub according to an embodiment of the present invention, the water in the groove portion 40 in the throttle channel 38 is transferred into the groove portion 40 in the tapered portion 42 that does not lose the surface tension of the water in the groove portion 40. The surface tension can be pulled into the groove 40 in the tapered portion 42 by the pulling force of the surface tension. Therefore, it is possible to easily guide the water in the groove portion 40 in the throttle channel 38 to be drawn into the groove portion 40 in the upstream tapered portion 42 along the groove portion 40. Further, it is possible to make it difficult to interrupt the flow of water drawn from the throttle channel 38 to the upstream tapered portion 42 via the groove portion 40.

  Furthermore, according to the water discharging apparatus 1 for bathtubs by one Embodiment of this invention, the water in the groove part 40 in the taper part 42 is supplied into the groove part 40 of the storage chamber 36 which is not defeated by the surface tension of the water in this groove part 40. The surface tension can be pulled into the groove 40 of the storage chamber 36 by the pulling force of the surface tension. Therefore, it is possible to easily guide the water in the groove portion 40 in the tapered portion 42 so as to be drawn into the upstream groove portion 40 along the groove portion 40. Further, it is possible to make it difficult to interrupt the flow of water drawn from the tapered portion 42 to the upstream side of the tapered portion 42 via the groove portion 40.

  Furthermore, according to the water discharging apparatus 1 for a bathtub according to the embodiment of the present invention, the first region A1 on the left and right center side of the throttle channel 38 is relatively close to the inlet 36a of the storage chamber 36. Therefore, after the water discharge is stopped, the water in the storage chamber 36 is drained from the inlet 36a to the ascending pipe, and the water in the first region A1 is drawn relatively strongly toward the inlet 36a. Therefore, the number of the groove portions 40 in the first region A1 is relatively reduced, and the disturbance of the water discharge from the water discharge port 4 due to the provision of the groove portion 40 is suppressed, and the water in the first region A1 in the throttle channel 38 is efficiently used. Can discharge well. On the other hand, the second regions A2 on the left and right ends of the throttle channel 38 are relatively far from the inlet 36a of the storage chamber 36. Therefore, when the water in the storage chamber 36 is drained from the inflow port 36a to the ascending 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, the water that easily collects in the second region A2 flows along the groove portions 40 from the second region A2. It can be easily drawn upstream, and the water in the second region A2 can be discharged efficiently. Therefore, it is possible to suppress the generation of residual water throughout the throttle channel 38.

  Furthermore, according to the water discharging apparatus 1 for bathtubs by one Embodiment of this invention, the groove part 40 extended from 1st area | region A1 of the throttle flow path 38 to the upstream rather than the throttle flow path 38 is eliminated, and only upstream from 2nd area | region A2. A groove 40 extending to the side is provided. Therefore, while suppressing that the water discharge from 1st area | region A1 of the left-right center side is disturb | confused, the 2nd area | region A2 of the left-right both ends side which has comparatively little influence on the disturbance of water discharge is utilized, Residual water can be discharged.

  Furthermore, according to the water discharging apparatus 1 for bathtubs by one Embodiment of this invention, the 1st area | region between 2nd area | regions A2 by the groove part 40 extended so that between the groove parts 40 of 2nd area | region A2 may be crossed in the left-right direction. The remaining water in the throttle channel 38 can be discharged more reliably in A1 and the second region A2.

  Furthermore, according to the water discharging apparatus 1 for a bathtub according to one embodiment of the present invention, the downstream end 40b of the groove portion 40 is provided in the throttle channel 38 and does not extend to the water discharging port 4. Can be prevented from being discharged along the groove portion 40, and it is possible to prevent the water discharged from the water discharge port 4 from being biased or disturbed so that a relatively uniform wide water discharge cannot be realized.

DESCRIPTION OF SYMBOLS 1 Water discharging apparatus 2 for bathtubs 2a Bottom part 2b Vertical wall 2c Upper end part 2d Side wall 3 Water discharging system 4 for bathtubs Water discharging port 5 Water discharging apparatus main body 6 1st water intake 8 First flow path 10 Pump 12 Three-way valve 14 2nd flow path 16 3rd flow path 18 Blow water discharge part 20 Jet pump unit 22 2nd water intake 24 4th flow path 26 Ascending pipe 28 Control part 30 Operation part 32 Chamber part 34 Jet nozzle 36 Reservoir 36a Inlet 36b Bottom face 38 Restriction flow path 38a Bottom 38b Entrance 40 Groove 40a Upstream end 40b Downstream end 40c Transverse portion 42 Tapered portion 44 Rib A1 First region A2 Second region α1 Inclination angle α2 Inclination angle H User W1 Width W2 Width W3 Width

Claims (11)

A water discharge device for a bathtub that is installed in a bathtub and discharges wide water in the left-right direction toward the user's shoulder,
A water discharge device main body for discharging the supplied water from a water discharge port formed in a wide shape in the left-right direction,
In the water discharge device body,
A storage chamber for temporarily storing water flowing in from an inlet connected to the supply pipe;
A throttle provided between the storage chamber and the water outlet and formed so as to have a channel cross-sectional area smaller than the channel cross-sectional area of the storage chamber so as to accelerate water flowing in from the storage chamber. A flow path;
A groove formed on the bottom surface of the throttle channel and extending upstream from the throttle channel;
Drawing-in force generating means for drawing water collected in the groove part in the throttle channel after stopping water discharge into the upstream side along the groove part by a drawing-in force toward the upstream side that is stronger than the surface tension of the accumulated water; The water discharging apparatus for bathtubs characterized by being formed.   2. The water discharge for bathtubs according to claim 1, wherein the drawing-in force generating means has an inclined surface that descends toward the upstream side upstream from the throttle channel and that the groove portion extends to the inclined surface. apparatus. The water discharge device main body further includes a tapered portion that forms the inclined surface that descends from the inlet of the throttle channel toward the upstream side,
The groove extends to the bottom surface of the storage chamber upstream from the tapered portion,
The water discharge apparatus for bathtubs according to claim 2, wherein an inclination angle of the groove portion in the storage chamber is smaller than an inclination angle of the groove portion in the tapered portion.   The water discharging apparatus for bathtubs according to claim 3, wherein the groove extends to the inclined surface of the inlet of the storage chamber.   The water discharge apparatus for bathtubs according to any one of claims 1 to 4, wherein a width of the groove portion in the throttle channel is formed to be equal to or less than a height of the throttle channel.   The water discharge apparatus for bathtubs according to any one of claims 3 to 5, wherein a width of the groove portion in the tapered portion is formed to be equal to or less than a width of the groove portion in the throttle channel.   The water discharge apparatus for bathtubs according to any one of claims 3 to 6, wherein a width of the groove portion in the storage chamber is formed to be equal to or less than a width of the groove portion in the tapered portion. The inlet is formed on the left and right center side of the storage chamber,
The groove portion is formed so that the number of the groove portions in the second region on the left and right ends is larger than the number of the groove portions in the first region on the left and right center side of the throttle channel. The water discharge apparatus for bathtubs of any one of Claims.   The water discharge apparatus for bathtubs according to claim 8, wherein the groove is formed to extend only from the second region of the throttle channel to the upstream side of the throttle channel.   The said groove part is a water discharging apparatus for bathtubs of Claim 9 further provided with the part extended so that it may cross | intersect between the said groove parts of the said 2nd area | region of the left-right both ends side.   The water discharge apparatus for bathtubs according to any one of claims 1 to 10, wherein a downstream end of the groove is provided in the throttle channel.

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