WO2014017386A1 - Water drainage device - Google Patents

Abstract

A water drainage device is configured in such a manner that the water drainage device comprises a water drainage recess having a shape partially recessed downward from the bottom of a water sink and allows water within the water sink to flow into the water drainage recess and to be drained from a water drainage opening formed in the bottom of the water drainage recess. The water drainage device is characterized in that a blade wheel is provided within the water drainage recess, the blade wheel applying force to the flow of drainage water flowing from the bottom of the water drainage recess to the water drainage opening, the force being generated by the rotation of the blade wheel and being applied around the drainage opening, hindering the flow of the drainage water and pushing back the flow, the blade wheel having rotating blades arranged on the outer periphery thereof about a rotating shaft, the rotating blades extending from the rotating shaft side toward the outer peripheral end and impinging on the drainage water in the rotational direction, the blade wheel also having, on the inner peripheral side thereof, water drainage openings connecting to the water drainage opening and penetrating through the blade wheel in the vertical direction.

Description

Drainage equipment

The present invention relates to a drainage device suitable for application to a sink equipped with a sink.
This application claims priority based on Japanese Patent Application No. 2012-163986 filed in Japan on July 24, 2012 and Japanese Patent Application No. 2012-280394 filed in Japan on December 24, 2012. , The contents of which are incorporated herein.

Normally, a drainage device such as a sink forms a recess for drainage by recessing a part of the bottom of the water receiving tank downward, and the water in the water receiving tank flows into the recess for draining and is formed at the bottom of the recess for draining. It drains from the drain outlet.
For example, in a sink, a part of the bottom of the sink as a water receiving tank is recessed downward to form a drain bowl (drain recess), and the water in the sink flows into the drain bowl and is formed at the bottom. It drains out from the drain outlet.
Generally, in a drain bowl of a sink, a garbage bowl for containing garbage is accommodated and held therein.

On the inner surface of this type of drain recess, slime tends to occur due to accumulation of fungi that have taken up nutrients, their dead bodies, or their metabolites.
Such a state where dirt such as slime and other oils adheres is unhygienic and causes a bad odor.

Various types of drainage devices are known as drainage devices of the type that drains water into the drainage recess and drains from the drainage port of the drainage recess.
For example, the following Patent Document 1 discloses an invention relating to a “vortex drainage port”, in which an impeller is rotatably provided inside a drainage recess that houses a hair catcher, and the impeller is drained by flowing into the drainage recess. It is disclosed that a swirl water flow is generated by rotating and the washing is performed by the swirl water flow.

Patent Document 2 below discloses an invention relating to a “drainage device at the bottom of a water tank”, in which rotating blades are radially extended from a rotating shaft portion of a drainage plug that opens and closes a drainage port, and the drainage is drained. The point which comprised so that a swirling flow might be produced in waste_water | drain by rotating a rotary blade vigorously with the effect | action of the waste_water | drain which flows in in a channel | path is disclosed.

Further, the following Patent Document 3 discloses an invention relating to a “remotely operated drain plug”, in which, similarly to the one disclosed in Patent Document 2, the rotating blades from the rotating shaft portion of the drain plug that opens and closes the drain port are disclosed. The blade is extended radially and the rotating blade is rotated integrally with the plug body by the flow of drainage flowing from the drainage port into the drainage passage.

Although those disclosed in these patent documents rotate the rotating blade in the recess for drainage, in any case, the drainage is quickly discharged, and the washing water flow by the drainage cannot be generated sufficiently.

Japanese Unexamined Patent Publication No. 2007-198130 Japanese Laid-Open Patent Publication No. 9-268623 Japanese Patent Laid-Open No. 9-316956

With the background as described above, the present invention has an object to provide a drainage device capable of effectively generating a cleaning water flow by drainage flowing into a drainage recess and cleaning the drainage recess. It was made.

One aspect of the present invention is to form a drainage recessed portion that is partially recessed downward from the bottom of the water receiving tank, allowing water in the water receiving tank to flow into the draining recess, and the bottom of the draining recess A drainage device for draining from a drainage port formed in the drainage recess, wherein the drainage flow from the bottom of the drainage recess toward the drainage port is subjected to a force generated by its own rotation around the drainage port. In addition, an impeller that prevents and pushes back the flow of the drainage is provided, and the impeller extends to the outer peripheral portion around the rotation shaft from the rotation shaft side toward the outer peripheral end and rotates with respect to the drainage. It is a drainage device having a rotary blade that hits the direction and having a drainage opening that communicates with the drainage port and penetrates in the vertical direction on the inner peripheral side.

In the drainage device, the impeller has a plate-like portion having an annular shape in the circumferential direction on the outer peripheral portion, the rotating blade is provided on the lower surface of the plate-like portion, and radially inward of the plate-like portion. The drain opening may be provided.

In the drainage device, the impeller may be rotationally driven by a power different from the drainage flow force that flows in the drainage recess toward the drainage port.

In the drainage device, the impeller is rotationally driven by using the force of the water flow in the water supply pipe for supplying water into the water receiving tank as the driving force, and the water flow force in the water supply pipe is in the water flow force. A turbine wheel that rotates at the same time, and a turbine wheel magnet is provided in the turbine wheel in an integrally rotated state, and an impeller side magnet that rotates integrally with the impeller is provided at a position separated from the turbine wheel magnet by a partition, The turbine wheel side and the impeller side may be magnetically coupled, and the driving force by the turbine wheel may be transmitted to the impeller to rotate the impeller.

In the drainage device, the water wheel is accommodated in a water wheel housing having a cylindrical portion centered on the rotation axis of the water wheel, and the flow of the water supply is directed to the water supply inlet provided in the cylindrical portion. You may provide the nozzle to eject.

In the drainage device, the water wheel side magnet and the impeller side magnet are configured in a disk shape, and the disk surfaces of the water wheel side magnet and the impeller side magnet are arranged in the axial direction of the rotating shaft extending in the vertical direction. You may arrange | position in the state which faces each other.

As described above, according to one aspect of the present invention, the impeller provided inside the drain recessed portion applies a force generated by its own rotation to the drain flow from the bottom of the drain recessed portion toward the drain port. In addition, an impeller that impedes and pushes back the flow of drainage causes the drainage to stay around the drain.
Furthermore, a washing water flow such as a vortex flow is generated while the stagnant drainage exerts a stirring action on the accumulated drainage by a centrifugal force generated by itself.
The washing water flow removes and cleans the bacteria before reaching the slime adhering to the inner surface of the drain recess, etc., its nutrients, oil and other dirt.
In addition, when the garbage is stored in the drain recess, the cleaning water flow is applied to the outer surface including the lower surface of the garbage to clean it.

These actions are mainly performed by the rotating blades provided on the outer periphery of the impeller, but the action of blocking the flow of drainage, the action of pushing back the drainage, and the action of adding centrifugal force to the accumulated water of the drainage are excessive. The drainage in the drainage recess overflows to the water receiving tank side.
In particular, this is likely to occur under a situation where the amount of inflow of drainage from the water receiving tank into the drain recess is large.
Since the waste water overflowing from the drain bowl contains dirt, it is not desirable that the waste water in the drain recess overflows to the water receiving tank side.

Therefore, in one aspect of the present invention, the impeller is provided with a drain opening that communicates with the drain port and penetrates in the vertical direction on the inner side of the outer peripheral rotating blade, that is, the inner peripheral side.
Thereby, when a large amount of accumulated water of the wastewater is generated around the drainage port, the excess amount can be discharged to the drainage port through the drainage opening.
Therefore, according to one aspect of the present invention, it is possible to balance the generation of an adequate amount of stagnant water for generating a good washing water flow and good drainage performance, and the wastewater stagnant water is generated excessively. It is possible to prevent the staying water from overflowing from the drain recess to the water receiving tank side due to the centrifugal force caused by the rotation of the impeller.

In one aspect of the present invention, a plate-like portion having an annular shape in the circumferential direction is provided on the outer peripheral portion of the impeller, a rotary blade is provided on the lower surface of the plate-like portion, and the drainage is disposed on the radially inner side of the plate-like portion. An opening can be formed.
When it does in this way, the waste_water | drain between a rotary blade and a rotary blade is interrupted | blocked by the cyclic | annular plate-shaped part, and cannot pass through between a rotary blade and a rotary blade upwards.
Therefore, the impeller can effectively push the centrifugal force due to rotation in the direction of pushing back against the drainage, and the drainage is guided outward in the radial direction, and the accumulated water of the drainage is generated well around the drainage port. As a result, it is possible to satisfactorily generate a washing water flow by drainage.
Moreover, the excessive stagnant water around the drainage port can be smoothly guided to the drainage port by the guiding action of the upper surface of the plate-like portion and discharged.

In the impeller, the rotation axis extends in the vertical direction inside the drain outlet, and at least the upper end of the rotary vane can be arranged at a position higher than the edge around the drain outlet on the bottom surface of the drain recess.

In one embodiment of the present invention, the impeller can be configured to be rotationally driven by a driving force different from the force of the flow of the drainage that flows through the drainage recess toward the drainage port.
Various driving forces can be used as the driving force for rotating the impeller, but as such driving force, the flow of water flowing inside the pipeline, especially the flow of water in the water supply pipe that supplies water to the water receiving tank The force can be suitably used as the driving force.

In this case, the water supply flow path is provided with a water wheel that rotates by the force of the water flow, and the water wheel side magnet is provided in an integrally rotating state on the water wheel, and the blade wheel is integrated with the impeller at a position separated by a partition wall. A rotating impeller side magnet is provided, the water wheel side and the impeller side are magnetically coupled, and the driving force by the water wheel can be transmitted to the impeller to rotate the impeller.
In this way, the force of the water flow can be used as a driving force for rotating the impeller, and the impeller can be forcibly driven to rotate, thereby generating a strong washing water flow in the drain recess. It is possible to clean the inside of the recess for drainage with high efficiency.

Further, in this case, the water turbine is accommodated in a water turbine housing having a cylindrical portion centered on the rotation axis of the water turbine, and a nozzle for ejecting the flow of the water supply toward the water turbine is provided at the water supply inlet provided in the cylindrical portion. I can keep it.
In this way, the flow rate of the feed water flowing into the water turbine housing through the inlet is increased, the speed of the rotation of the water wheel and the rotation of the impeller rotating integrally therewith is increased, and the washing water flow is made efficient in the drain recess. Can be generated automatically.

In the above drainage device, the water wheel side magnet and the impeller side magnet are configured in a disc shape, and the water wheel side magnet and the impeller side magnet are in a state in which the disk surfaces face each other in the axial direction of the rotating shaft extending in the vertical direction. Can be arranged opposite to each other.
Here, the disk shape includes both those including and not including a through-opening in the center or other part.

In the drainage device that rotates the impeller by rotating the water wheel with the force of the water flow in the water supply channel that supplies water into the water receiving tank, the drainage that flows into the drainage recess when the water supply flow rate (instantaneous flow rate) increases At the same time, the rotational speed of the water wheel increases, and the rotational speed of the impeller in the drainage recess increases accordingly.
As a result, an increase in the amount of accumulated water in the recess for drainage and an increase in the momentum of the washing water flow occur, and if the degree exceeds a certain limit, the drainage outflow from the drainage opening provided in the impeller is also caused. Regardless, the drainage in the drainage recess may overflow to the water receiving tank side.

In this case, before the impeller reaches the rotational speed of the limit that causes the drainage in the drainage recess to overflow to the water receiving tank side, the magnetic coupling (magnetic coupling) between the watermill side magnet and the impeller side magnet is cut off, By blocking the power transmission from the water wheel to the impeller and causing the water wheel side magnet to idle, the overflow (backflow) of the waste water in the drain recess to the water receiving tank side can be reliably prevented.

In one aspect of the present invention, for this purpose, a turbine-side magnet and an impeller-side magnet are configured in a disk shape, and are arranged in an opposing state in the axial direction of the rotating shaft. When the side magnet is configured and arranged in this way, the magnetic attractive force between the water wheel side magnet and the impeller side magnet can be set relatively weak, and before the impeller side magnet reaches the limit rotational speed. At this stage, it is easy to disconnect the magnetic connection between the water wheel side magnet and the wheel wheel side magnet by utilizing the increase in load resistance acting on the wheel.

Specifically, when the impeller side magnet reaches the set rotation speed before reaching the limit rotation speed (rotation speed), the rotation of the impeller side magnet with respect to the water wheel side magnet is lost, and the magnetism is made to stop the step-out. It is easy to tune the strength of the attractive adsorption force.
Thus, by stopping the step-out of the impeller side magnet, it is possible to prevent the drainage from overflowing to the water receiving tank due to the overturning of the impeller side magnet.

It is the figure which showed the sink and periphery part containing the drainage device which is one Embodiment of this invention. It is principal part sectional drawing of the drainage device of FIG. It is sectional drawing which expanded and showed the drainage bowl of FIG. 2, and its peripheral part. It is sectional drawing which expanded and showed the water turbine unit of FIG. 2, and its peripheral part. It is the figure which showed the impeller in the same embodiment. It is the figure which showed the impeller in the same embodiment. It is the figure which showed the impeller in the same embodiment. It is operation | movement explanatory drawing of the embodiment. It is operation | movement explanatory drawing of the embodiment. It is principal part sectional drawing of other embodiment of this invention. It is sectional drawing which expanded and showed the drainage bowl of FIG. 7, and its peripheral part. It is sectional drawing which expanded and showed the drain bowl bottom part of FIG. It is sectional drawing which expanded and showed the water turbine unit of FIG. 7, and its peripheral part. It is the figure which decomposed | disassembled and showed the fitting part of the rotating shaft and outer cylinder of the embodiment. It is the figure which decomposed | disassembled and showed the water turbine unit of the embodiment. It is AA sectional drawing of FIG. It is the figure which showed the shape of the nozzle of the embodiment. It is the figure which showed the shape of the nozzle of the embodiment. It is a schematic diagram explaining the effect of the embodiment. It is a schematic diagram explaining the effect different from FIG. It is the figure which showed the comparative example with respect to the same embodiment. It is the figure which showed the comparative example with respect to the same embodiment.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 indicates a sink (water receiving tank) provided in a sink (not shown), and a sink tap (hereinafter simply referred to as a faucet) 12 is provided in the sink 10. The faucet 12 is a single lever type mixing faucet.
The faucet 12 includes a faucet body 14 that rises from the top surface of the sink 10, and a water discharge pipe 16 that extends from the faucet body 14 toward the center of the sink 10. A water discharge port 18 is provided at the tip of the water discharge pipe 16.
The faucet body 14 is provided with a mixing unit for mixing water and hot water.

Reference numeral 20 denotes a lever handle. By operating the lever handle 20, water discharge from the water discharge port 18, water stoppage and water discharge flow rate adjustment, and water discharge temperature adjustment are performed.
A water supply pipe 22 on the primary side for supplying water and hot water is connected to the water tap 12 (only one water supply pipe 22 is shown in the figure, and the other water supply pipe 22 is not shown).
Reference numeral 24 denotes a secondary side water supply pipe that forms a water supply flow path that guides water from the mixing portion of the faucet 12 to the water discharge port 18, and a water turbine unit 25 to be described later is connected to the water supply pipe 24. .

Reference numeral 24A is an inlet side water supply pipe that allows water from the mixing valve to flow into the water turbine unit 25, and reference numeral 24B is an outlet side water supply pipe that guides water that has flowed out of the water wheel unit 25 to the water outlet 18 side. One end portions of the pipe 24 </ b> A and the outlet-side pipe 24 </ b> B are connected to a turbine housing 26 described later of the turbine unit 25.

In FIG. 2, the code | symbol 32 shows the drainage bowl as a recessed part for drainage comprised in the form partially dented downward from the bottom part 30 of the sink 10. FIG.
A drain trap 34 is provided below the drain bowl 32.
The drain bowl 32 has a flange portion 38 projecting radially outwardly at the upper end, and the flange portion 38 is attached to the bottom portion 30 so as to be hooked on the edge of the opening 40 of the bottom portion 30 of the sink 10. It is attached.

Reference numeral 42 denotes a garbage bowl for storing garbage or the like housed in the drain bowl 32. The garbage basket 42 has a frame portion (here, having an L-shaped cross section) that forms a ring shape in the circumferential direction at the upper end portion. 43), and the frame portion 43 is held inside the drainage bowl 32 so as to be hooked on the annular stepped portion 44 of the drainage bowl 32.
The garbage basket 42 is almost entirely composed of a mesh except for the frame portion 43.

The drain trap 34 has an outer cylinder 36 that forms a trap body, and an inner cylinder 46 that is inserted downward from above into the inside of the trap. keeping.
The drain trap 34 holds the sealed water 48 to prevent odor backflow from the drain pipe 50 side into the sink 10.

A drainage port (second drainage port) 58 is provided laterally at the upper portion of the outer cylinder 36, and a cylindrical connection pipe 52 projects from the drainage port 58.
An end of the drain pipe 50 is fitted in the connection pipe 52 in an internally fitted state, and the connection pipe 52 and the drain pipe 50 sandwich the flange portion 54 formed in each state in a superposed state. The clip 56 is connected to the removal state.
The inner cylinder 46 has an upper end and a lower end, and the drainage from the sink 10 flows into the inner cylinder 46 from the opening at the upper end of the inner cylinder 46 and flows down from the opening at the lower end. It flows out between the cylinder 46 and the outer cylinder 36, flows out from the lateral drainage port 58 of the outer cylinder 36 to the drain pipe 50, and is discharged outside.

As shown in FIG. 3, the drainage bowl 32 has a circular peripheral wall portion 59 and a bottom portion 60.
An opening is formed at the center of the bottom 60, and the upper end of the inner cylinder 46 is disposed inside the opening.
The opening at the upper end of the inner cylinder 46 becomes a drain outlet 62 in the drain bowl 32, and the drainage in the drain bowl 32 is discharged downward through the drain outlet 62.
A radially inward annular flange portion 64 is provided at the edge of the opening of the drain bowl 32, and the upper end portion of the outer cylinder 36 and the upper end portion of the inner cylinder 46 are opposed to the flange portion 64. It is attached.

Reference numerals 66 and 68 denote trap attachment members (hereinafter simply referred to as attachment members) for attaching the upper end portion of the inner cylinder 46 and the upper end portion of the outer cylinder 36 to the flange portion 64 of the drainage bowl 32. Are in the shape of a circular ring.
The mounting members 66, 68 have flange portions 70, 72, and the outer peripheral surface of the mounting member 66 so that the flange portions 64 of the drainage bowl 32 are sandwiched from both the upper and lower sides via the seal members 158 by the flange portions 70, 72. The male screw and the female screw on the inner peripheral surface of the attachment member 68 are fixed to the flange portion 64 of the drainage bowl 32 by screw connection.

After the upper end portion of the inner cylinder 46 is fitted in the fitting state with respect to the mounting member 66, the latching portion 74 at the upper end of the inner cylinder 46 is latched to the stepped portion on the inner surface of the mounting member 66. In this state, the inner cylinder 46 is attached to and held by the flange portion 64 of the drainage bowl 32 via the attachment members 66 and 68.
The inner cylinder 46 is attached to and held by the attachment member 66 by being inserted downward with respect to the attachment member 66 from the upper side in the drawing.

The outer cylinder 36 is fitted into the cylindrical fitting portion 76 of the mounting member 68 in an upper end portion thereof, and the flange portions 78 provided on the outer cylinder 36 are overlapped with each other by the clip 80. By being sandwiched, the attachment member 68 is attached and held.

An arm 82 extends radially inward from the upper end portion of the inner cylinder 46, and a cylindrical support that rotatably supports a rotation shaft 86 described later at the inner end portion thereof and supports the same in the radial direction. Part 84 is configured.
As shown in FIG. 2, an arm 82 similarly extends radially inward from the lower end portion of the inner cylinder 46, and at its inner end portion, a rotating shaft 86 is rotatably fitted to A cylindrical support portion 84 that supports in the radial direction is configured.

The rotary shaft 86 is disposed at the center position inside the drain outlet 62 and extends in the vertical direction, and the impeller 88 provided inside the drain bowl 32 is in a state of rotating integrally with the upper end portion thereof. It is connected.
The specific configuration, arrangement position, and operation of the impeller 88 will be described later.

As shown in FIG. 4, a bottomed cylindrical portion 90 is provided at the lower end of the rotating shaft 86, and a cylindrical magnet 92 is attached to the lower side of the cylindrical portion 90.
The magnet 92 is an impeller-side magnet that rotates integrally with the impeller 88 described above.
A rotary blade 94 having a shape extending linearly in the radial direction from the rotary shaft 86 is provided on the upper bottom portion of the cylindrical portion 90 in an integrally rotated state.
The rotary blade 94 has a function of giving a rotational force to the sealed water 48 and generating a vortex in the sealed water 48 as a washing water flow.

The outer cylinder 36 has an opening 96 at the lower end, and the opening 96 is closed with a cap 98.
The cap 98 is fitted to the cylindrical portion 100 formed around the opening 96 of the outer cylinder 36 in an outer fitting state.
The cap 98 is provided with a cylindrical recess 102, and the lower portion of the cylindrical portion 90 is rotatably accommodated in the recess 102 together with the magnet 92.
The cap 98 is provided with a support shaft 104 that protrudes upward at the center thereof, and the rotation shaft 86 is rotatably supported by the support shaft 104.

The above-described water turbine unit 25 is disposed below the cap 98, and the water wheel housing 26 of the water wheel unit 25 is attached to the cap 98 with a clip 106.
Specifically, the water turbine housing 26 is attached to the cap 98 by a clip 106 that sandwiches the flange portions 108 provided on the cap 98 and the water turbine housing 26 in an overlapped state.

The water turbine housing 26 includes a housing body 26A having a shape with an open upper end, and a lid body 26B that closes the opening at the upper end.
The housing main body 26 </ b> A has a cylindrical portion 144 that forms an outer peripheral wall of the water turbine housing 26, and a lower bottom portion 146, centering on a rotation axis of the water wheel 110 described later.
The lid body 26B has an upper bottom portion 147 and a cylindrical rising portion 148 rising from the outer peripheral end of the upper bottom portion 147, and the rising portion 148 is attached to the cap 98 by the clip 106 described above. .
A concave portion 150 having a bottomed cylindrical shape is provided on the upper bottom portion 147 of the lid body 26 </ b> B downward in the figure, and the magnet 92 is provided in the concave portion on the inner side of the concave portion 150. Is housed together with the department.

A water wheel 110 is rotatably accommodated in the water wheel housing 26.
The water turbine 110 has a main body 114 having a bottom portion 118 and a cylindrical portion 152, and blades 112 are provided on the cylindrical portion 152, that is, on the outer peripheral portion of the water turbine 110. The main body 114 is provided with a cylindrical magnet 116. The magnet 116 alternately has N poles and S poles along the circumferential direction (this applies to the magnet 92 described above).
The magnet 116 serves as a turbine-side magnet, and the magnet 92 that serves as the impeller-side magnet with respect to the magnet 116 uses the turbine housing 26 that forms part of the water supply flow path and the cap 98 as a partition wall. Are arranged concentrically inside the magnet 116, and the magnet 92 and the magnet 116 are arranged to face each other in the radial direction.

That is, the water wheel 110 and the rotating shaft 86, that is, the above-described impeller 88 are magnetically coupled by the magnets 116 and 92. Due to the magnetic coupling, the rotational force of the water wheel 110 is transmitted to the impeller 88 in the drainage bowl 32 through the rotation shaft 86, and the impeller 88 rotates in the drainage bowl 32 integrally with the water wheel 110.
That is, the impeller 88 is forcibly rotated in the drain bowl 32 by using the force of the water flow in the water supply passage from the mixing portion of the faucet 12 to the water outlet 18 as a driving force.
The water turbine 110 has a rotating shaft 120 that protrudes in the vertical direction from the center of the bottom portion 118, and a lower end portion and an upper end portion of the rotating shaft 120 are connected to bearing portions 122 and 124 provided in the water turbine housing 26. And is rotatably supported.

The cylindrical portion 144 of the water turbine housing 26 is provided with an inflow port 126 and an outflow port 128. Water from the inlet water supply pipe 24A shown in FIG. It flows in and the flow is applied to the blades 112 of the water wheel 110 in a direction to rotate the water wheel 110 in a certain direction, and this is rotated.
Water that has passed through the water wheel 110 flows out from the outlet 128.
The water that has flowed out is guided to the water outlet 18 of the faucet 12 through the water supply pipe 24B on the outlet side, and discharged from the water outlet 18 into the sink 10. That is, water is supplied into the sink 10 as water from the faucet 12.

As shown in FIGS. 5A, 5B, and 5C, the impeller 88 disposed inside the drain bowl 32 has a hub 130 at the center and a circular donut-shaped plate portion 132 at the outer periphery. A drainage opening 134 communicating with the drainage port 62 and penetrating in the vertical direction is formed between them.
The hub 130 at the center and the plate-like portion 132 at the outer periphery are connected by a plurality of arms 136.

As shown in FIG. 5B, the annular plate-like portion 132 at the outer peripheral portion has a shape inclined upward from the center side toward the outer peripheral side. A plurality of plate-like rotary blades 138 whose side surface shape and front surface shape form a triangular shape are provided at regular intervals along the circumferential direction so as to hang from the lower surface of the plate-like portion 132.
The rotary blade 138 has a shape extending linearly from the center side of the impeller 88 in a radial direction, that is, in a radial direction with respect to a circle around the rotation axis centered on the rotation axis.
The root portion on the inner peripheral side of the plate-like portion 132 is configured to be thicker than the other portion of the plate-like portion 132 over the entire circumference, and the thick-walled portion 140 is an arm as shown in FIG. 5C. It projects downward together with 136.

The hub 130 protrudes further downward than these thick portions 140.
The hub 130 is provided with a fitting hole 142 opened downward as shown in FIG. 5B. The fitting hole 142 has a polygonal shape, which is a hexagonal shape in this embodiment, and a polygonal portion (in this embodiment, a hexagonal shape) at the upper end of the rotary shaft 86 having a circular cross section is fitted therein. Thus, the impeller 88 rotates integrally with the rotation shaft 86.

As shown in FIGS. 2 and 3, the impeller 88 is disposed at a position directly above the drain outlet 62 in the drain bowl 32, and each of the plurality of rotary blades 138 provided in the impeller 88 is drained. The upper surface (bottom surface) of the bottom portion 60 in the bowl 32, specifically, the bottom surface 60 is disposed at a position generally higher than the edge portion 60 a around the drain outlet 62.

In this embodiment, when the user operates the lever handle 20 of the faucet 12 to discharge water from the water outlet 18 and perform water work, the water discharged from the water outlet 18, that is, the supplied water is received by the sink 10. Then, the water is drained from the bottom 30 of the sink 10 into the drain bowl 32 as shown in FIGS. 6A and 6B.

At this time, the water (drainage) flowing through the bottom 30 of the sink 10 flows into the drainage bowl 32 and reaches the bottom 60 thereof.
The drainage that has reached the bottom portion 60 flows toward the drainage port 62 along the bottom portion 60, and the flow tries to flow in the centripetal direction from the entire circumference around the drainage port 62 toward the drainage port 62 (in that case). In addition, since the flow of the drainage is a centripetal flow from the entire circumference around the drainage port 62 toward the drainage port 62, the flow does not act as a force for rotating the impeller 88 in one specific direction).

At this time, the impeller 88 in the drain bowl 32 has already been forcibly rotated by using the force of the water flow in the water supply pipe 24 as a driving force.
Therefore, when the drainage in the drainage bowl 32 is about to flow into the drainage port 62 along the bottom portion 60, the rotating blade 138 of the impeller 88 that rotates by force driving hits the rotation direction against the flow of the drainage. , It becomes a resistance of the flow of the drainage toward the drainage port 62 and prevents and suppresses the inflow to the drainage port 62.

The impeller 88 not only serves as a flow resistance member by the rotary blade 138 but also causes the centrifugal force generated by its rotation to act on the flow of the drainage so that the drainage is discharged into the drain 62 as shown in FIGS. 6A and 6B. The water is pushed back in the direction away from the water, and the drainage is retained around the drainage port 62 by the action.
In addition, the impeller 88 generates a washing water flow such as a vortex while exerting a stirring action by applying a centrifugal force to the staying water by the rotary blade 138.

At this time, in the present embodiment, the outer peripheral portion of the impeller 88 is provided with a plate-like portion 132 having an annular shape in the circumferential direction, and the rotary blade 138 is provided on the lower surface of the plate-like portion 132. The drainage between the rotary blades 138 is blocked by the annular plate-like portion 132 and cannot pass upward between the rotary blades 138 and 138, and the impeller 88 rotates due to the drainage. Centrifugal force acts effectively, and the stagnant water of the waste water is generated around the drain port 62, and the washing water flow by the waste water is generated well.

The generated cleaning water stream strikes the inner surface of the drain bowl 32, removes the bacteria before reaching the slime adhering to the inner surface of the drain bowl 32, removes nutrients, oil and other dirt, and cleans the inner surface of the drain bowl 32.
The cleaning water flow generated at the same time hits the outer surface of the garbage basket 42, mainly the lower surface thereof, and removes the dirt adhering to the outer surface of the garbage basket 42 to perform a cleaning action.

A part of the washed water then flows into the drain trap 34 through the drain port 62 while the impeller 88 continues to rotate, or the entire water trap from the drain port 62 by stopping the water supply from the faucet 12. 34, and then flows into the drain pipe 50 from the lateral drainage port 58 and is discharged to the outside through the drain pipe 50.

If the amount of waste water pushed back by the impeller 88, that is, the rotary blade 138 is excessive, the waste water pushed back may overflow from the drain bowl 32 to the bottom 30 side of the sink 10, but in this embodiment, stagnant water. When the amount of accumulated water becomes large, the excessive accumulated water can flow into the drain port 62 through the drain opening 134 of the impeller 88 (at this time, the accumulated water guides the upper surface of the plate-like portion 132 of the outer peripheral portion of the impeller 88). The water is smoothly guided to the drain opening 134 and flows into the drain port 62), and excessive stagnant water is generated around the impeller 88, and the drainage is subjected to centrifugal force by the impeller 88, and the bottom 30 side of the sink 10. Can prevent the phenomenon overflowing.

As described above, in the present embodiment, the impeller 88 is provided with the drainage opening 134 of drainage penetrating in the vertical direction in communication with the drainage port 62 on the inner side of the outer peripheral rotary blade 88, that is, on the inner peripheral side. When a large amount of accumulated water is generated around the drain port 62, the excess amount can flow out to the drain port 62 through the drain port 134.
This makes it possible to balance the generation of an appropriate amount of stagnant water for generating a good washing water flow and good drainage performance, and to retain the drainage water generated excessively while washing the drain bowl 32 well. Can be prevented from overflowing to the sink 10 side due to the centrifugal force caused by the rotation of the impeller 88.

In the present embodiment, when water is discharged from the water discharge port 18, the impeller 88 rotates and the inside of the drain bowl 32 is automatically washed.
Accordingly, since the user does not need to perform a special operation for cleaning the inside of the drain bowl 32, there is no need for labor for cleaning, and the user is not burdened with cleaning.
That is, in this embodiment, even if the user is not conscious of cleaning, if the water tap is used, the rotary blade 138 automatically rotates and the inside of the drain bowl 32 is cleaned.

Moreover, in this embodiment, when water work is performed using the faucet 12 in the sink 10, the drainage itself becomes a washing water flow to wash the inside of the drainage bowl 32, and thus water is discharged only for washing. It can save water compared to.

7-14B show other embodiments of the present invention.
In this embodiment, as shown in FIG. 8, the drainage bowl 32 is attached to a pair of bowl mounting members 156 and 157 via seal members 153 and 154 at a flange portion 38 projecting in an annular shape radially outward at the upper end. And attached to the bottom 30 of the sink 10.
Specifically, the bowl mounting members 156 and 157 are provided with clamping portions 160 and 162, which are connected by a screw connection between the external thread on the outer peripheral surface of the bowl mounting member 157 and the internal thread on the inner peripheral surface of the bowl mounting member 156. The drainage bowl 32 is fixed to the flange portion 159 on the sink 10 side so that the flange portion 38 of the drainage bowl 32 is sandwiched from above and below by the pair of sandwiching portions 160 and 162 together with the flange portion 159 on the sink 10 side. Is attached.

A garbage basket 42 is held inside the drain bowl 32. An impeller 88 is rotatably provided on the lower side of the garbage basket 42.
In this embodiment, a plate-like handle 163 that protrudes toward the center of the garbage basket 42 is provided on the frame portion 43 that has a substantially square cross section of the garbage basket 42. In this embodiment, the garbage basket 42 The whole 42 except for the frame portion 43 is made of a punching metal formed by dispersing and forming a large number of through holes.

Further, in this embodiment, the bottom portion 164 of the garbage basket 42 is provided with a concavely curved portion 168 formed by partially curving a part thereof upward.
The concave curved portion 168 is provided in order to facilitate drainage of excess retained water when the large amount of accumulated water is generated around the impeller 88 in the drain bowl 32, that is, to improve drainage performance.
As shown in FIG. 7, a drain trap 34 is provided below the drain bowl 32.
The configuration of the drain trap 34 is basically the same as that of the above embodiment.

In this embodiment, as shown in FIGS. 7 and 8, the opening of the bottom 60 of the drainage bowl 32 is provided at a position eccentric from the center in plan view, and the inner cylinder 46 is located inside the opening. The upper end of is arranged.
That is, in this embodiment, the drain outlet 62 of the drain bowl 32 is disposed at a position eccentric from the center of the bottom 60.

As shown also in FIG. 9, a radially inward annular flange portion 64 is provided at the edge of the opening at the lower end of the drain bowl 32, and the outer cylinder 36 is opposed to the flange portion 64. And the upper end of the inner cylinder 46 are attached. The mounting structure is also basically the same as in the above embodiment.

The inner cylinder 46 is attached to and held by the attachment member 66 by being inserted downward from the upper side in the drawing with respect to the attachment member 66 in the same manner as in the above embodiment.
More specifically, the inner peripheral surface of the mounting member 66 is provided with protrusions 170 at positions different from each other by 180 °, and the outer peripheral surface of the inner cylinder 46 is provided with a corresponding spiral recess 172.

When the inner cylinder 46 is attached, the protrusion 170 of the attachment member 66 and the opening at the lower end of the recess 172 of the inner cylinder 46 are fitted together, and the sealing cylinder 46 is rotated and screwed.
Then, the inner cylinder 46 moves downward in the figure by the guiding action of the protrusion 170 and the recess 172. The inner cylinder 46 is attached to the attachment member 66 in the axially positioned state by finally engaging the upper engagement portion 74 with the stepped portion of the attachment member 66 and engaging therewith.

In this embodiment, as shown in FIG. 7, an arm 82 is provided only at the upper end of the inner cylinder 46, and a rotary shaft 86 is rotatably fitted at the inner end of the inner cylinder 46. The cylindrical support part 84 which supports in a direction is configured.
The rotary shaft 86 having a circular cross section is an engagement shaft portion 176 whose upper end is a polygonal shape, and this engagement shaft portion 176 is at the back of the fitting hole 142 in the impeller 88. The impeller 88 is engaged with and engaged with a corresponding polygonal engagement hole 174, and the impeller 88 rotates integrally with the rotation shaft 86 by the engaging action.

As shown in FIG. 10, an impeller 88 side magnet 178 is attached to the lower end portion of the rotating shaft 86 by an attachment member 180.
In this embodiment, the magnet 178 has a disk shape having a through-opening at the center, and is arranged in a state where its center axis coincides with the center axis of the rotation shaft 86. That is, the board surface is arranged in the vertical direction.

The attachment member 180 has a main body portion 182 having a shape with a lower end opened, and a lid portion 184 that closes the opening at the lower end.
The magnet 178 is sandwiched between the main body portion 182 and the lid portion 184, and is attached to the rotary shaft 86 in an integrally rotated state via the attachment member 180.
The attachment member 180 has a circular fitting hole 188 in the center, and a ring-shaped bearing member 190 is attached thereto.

In this embodiment, the outer tube 36 is closed at the bottom 192 at the lower end.
As shown in FIG. 11, the bottom 192 is provided with a support shaft 194 protruding upward at the center thereof.
A mounting member 180 is fitted to the support shaft 194 through the bearing member 190 in the fitting hole 188, and the rotating shaft 86 is rotatably supported by the support shaft 194 through the mounting member 180. ing.

A cylindrical outer fitting portion 196 is formed on the lower end portion of the outer cylinder 36 so as to protrude downward.
The water turbine housing 26 in the water turbine unit 25 disposed below the outer cylinder 36 is provided with an inner fitting portion 198 at the upper end, and the inner fitting portion 198 is fitted into the outer fitting portion 196. Is fitted.
In the fitted state, the turbine housing 26 is attached to the outer cylinder 36 by the attachment member 200.

The water turbine housing 25 has a cylindrical portion 202 centering on the rotation axis of the water wheel 110 and a lower bottom portion 204, which form an outer peripheral wall thereof, and a housing body 26A having an upper end opened, and an upper bottom portion 206. The lid body 26B closes the opening at the upper end of the housing body 26A.
The housing body 26A and the lid body 26B are assembled by screwing.

The water wheel 110 housed in the water wheel housing 26 is configured by assembling a lower first member 208 and an upper second member 210 that are separate from each other.
Inside the water wheel 110, a magnet 214 serving as a water wheel side magnet is incorporated.
The water wheel 110 side magnet 214 is incorporated in the water wheel 110 so as to be sandwiched in the vertical direction by the lower first member 208 and the upper second member 210.

The water wheel 110 side magnet 214 is also of a disk shape having a through opening at the center, and is arranged in a state where the center axis line coincides with the center axis line of the rotation shaft 86. The turbine wheel housing 26 forming a part and the bottom portion 192 of the outer cylinder 36 are used as a partition wall, and are opposed vertically to the impeller 88 side magnet 178 disposed at the upper position thereof.
That is, in the axial direction of the rotating shaft 86, the impeller 88 side magnet 178 and the water wheel 110 side magnet 214 are disposed to face each other with a predetermined distance therebetween.
Due to the magnetic coupling of these magnets 178 and 214, the rotational force of the water wheel 110 is transmitted to the impeller 88 in the drainage bowl 32 through the rotating shaft 86, and the impeller 88 is integrated with the water wheel 110 in the drainage bowl 32. Rotate with.

As shown in FIG. 12, the water turbine 110 has a plurality of blades 212 that protrude downward from the lower surface of the first member 208 along the circumferential direction.
The water turbine 110 has a cylindrical portion 215 and a shaft portion 216 at the center thereof, and the cylindrical portion 215 and the shaft portion 216 are respectively ring-shaped by the corresponding shaft portion 218 and the cylindrical portion 220 of the water turbine housing 26. The bearing member 190 is rotatably supported. In FIG. 10, 236 is a water drain plug.

As shown in FIG. 13, the water supply inlet 126 and the outlet 128 provided in the cylindrical portion 202 of the water turbine housing 26 are respectively tangential to the circular inner peripheral surface of the cylindrical portion 202. Specifically, it is oriented so as to face in the same direction as the tangential direction of the downstream portion and the upstream portion in the immediate vicinity of the inflow port 126 and the outflow port 128 so as to face the same direction.
In the present embodiment, a nozzle 222 that is separate from the water turbine housing 26 is incorporated in the inflow port 126.
The nozzle 222 increases the flow rate of the water supply and ejects it toward the water wheel 110, specifically toward the blades 212 of the water wheel 110. By incorporating such a nozzle 222 into the inlet 126, The rotational speed is increased, thereby increasing the rotational speed of the impeller 88 in the drainage bowl 32, and the washing water flow can be efficiently generated by the impeller 88. As a result, the cleaning efficiency in the drain bowl 32 can be increased.

14A and 14B specifically show the shape of the nozzle 222.
As shown in the drawing, the nozzle 222 has a flange portion 228 at the base end of a cylindrical main body 226 and a nozzle hole 230 inside the main body 226.
As shown in the figure, the nozzle 222 has a shape in which the tip end surface 238 is cut obliquely. More specifically, the entire front end surface 238 including the opening surface 238 b formed by the opening 232 at the front end of the nozzle hole 230 and the front end surface 238 a of the cylindrical main body 226 is the inner peripheral surface of the cylindrical portion 202 in the water turbine housing 26. It is made into the arc-shaped surface (arc surface) which curves with the same curvature.
The nozzle 222 is configured so that the tip end surface 238 having an arc shape matches the inner peripheral surface of the cylindrical portion 202 (with the front end surface 238 positioned on the extension of the inner peripheral surface P of the cylindrical portion 202). It is built in a direction.

When the position of the nozzle 222 around the central axis is displaced, the tip end surface 238 forming an arc surface does not match the inner peripheral surface P of the cylindrical portion 202. Therefore, the nozzle 222 is provided with a convex portion 231 for positioning. .
As shown in FIG. 12, a corresponding positioning recess 234 is provided inside the inflow port 126. By incorporating the nozzle 222 so that the projection 231 fits into the recess 234, The nozzle 222 can be incorporated into the inlet 126 in a properly positioned state.

By setting the nozzle 222 incorporated in the inlet 126 as described above, the opening 232 at the tip of the nozzle hole 230 can be positioned as close to the water turbine 110 as possible, and the jet flow from the opening 232 can be as much as possible. Without being diffused, it can be applied to the blades 212 of the water wheel 110 from a close position, and the rotation speed of the water wheel 110 can be efficiently increased.

For example, when the shape of the nozzle 222 is a shape in which the entire front end surface forms a surface perpendicular to the axis, such as the nozzles 222A-1 and 222A-2 shown in the comparative examples of FIGS. 17A and 17B, as shown in FIG. 17B. In addition, the jet flow from the opening 232A of the nozzle 222 is diffused before hitting the blade 212 of the water wheel 110, and hits the blade 212 in a state where the momentum is reduced. In this case, the energy of the jet flow cannot be efficiently applied to the water turbine 110.

On the other hand, in the nozzle 222 of this embodiment, as shown in FIG. 13, the jet flow from the opening 232 at the tip of the nozzle hole 230 can be applied to the blades 212 without being diffused as much as possible. Can be added as energy.
In some cases, only the opening surface 238b formed by the opening 232 at the tip of the nozzle hole 230 may be a circular arc surface.

Also in this embodiment, the hole diameter D inside the outlet 128 is larger than the hole diameter d of the nozzle hole 230 in the nozzle 222.
By doing in this way, the water that has flowed into the water turbine housing 26 from the inflow port 126 becomes easy to escape from the outflow port 128, and the water that has flowed into the water wheel housing 26 stays long, and this becomes the rotational resistance of the water wheel 110. Can be prevented.

The nozzle 222 incorporated in the inflow port 126 has the following function by being configured separately from the water turbine housing 26 in addition to the function of increasing the flow rate of the water supply flow and applying it to the water wheel 110.
This will be specifically described below.
In this embodiment, when the flow rate of the water supply increases, the flow rate of the waste water flowing into the drain bowl 32 increases, and at the same time, the rotational speed of the water wheel 110 increases, and accordingly, the impeller 88 in the drain bowl 32 is increased. The rotation speed increases.
As a result, an increase in the amount of accumulated water in the drain bowl 32 and an increase in the momentum of the washing water flow occur, and when the degree exceeds a certain limit, the drainage outflow (discharge) from the drain opening 134 provided in the impeller 88 occurs. Despite this, the drainage in the drainage bowl 32 may overflow to the sink 10 side.

In this case, before the impeller 88 reaches the rotational speed at which the drainage water in the drainage bowl 32 overflows to the sink 10 side, the magnetic coupling (magnetic cup) between the waterwheel 110 side magnet 214 and the impeller 88 side magnet 178 is performed. By cutting off the ring) and interrupting the transmission of power from the water wheel 110 to the impeller 88, it is possible to prevent overflow (backflow) of the waste water in the drain bowl 32 to the sink 10 side.

In this embodiment, aiming at this, the water wheel 110 side magnet 214 and the impeller 88 side magnet 178 are configured in a disk shape, and they are arranged in a vertically opposed state in the axial direction of the rotation shaft 86, In this way, for example, as shown in the first embodiment, the water wheel 110 side magnet 116 and the impeller 88 side magnet 92 are configured in a cylindrical shape, and compared with a case where each is opposed to each other in the radial direction. Therefore, the magnetic attractive force between the water wheel 110 side magnet 214 and the impeller 88 side magnet 178 can be set to be relatively weak by reducing the area of the facing surface, and the impeller 88 side magnet 178 can be rotated at the limit. It is easy to disconnect the magnetic connection between the water wheel 110 side magnet 214 and the blade wheel 88 side magnet 178 by using an increase in load resistance acting on the impeller 88 at a stage before reaching the number.

Specifically, when the impeller 88 side magnet 178 reaches the set rotational speed before reaching the limit rotational speed (rotational speed), the rotation synchronization of the impeller 88 side magnet 178 with respect to the water wheel 110 side magnet 214 is lost. It is easy to tune the strength of the magnetic attractive force so as to stop the step-out.
Thereby, it is possible to prevent the overflow of the drainage to the sink 10 side due to the excessive rotation of the impeller 88 side magnet 178.

Here, the nozzle 222, which is a separate body from the water turbine housing 26, is replaced with one having a different hole diameter d of the nozzle hole 230, so that the rotation speed of the water wheel 110 and the impeller 88 can be adjusted even under the same water supply flow rate. Therefore, it also functions as a step-out control means for controlling and controlling the step-out stop time when the amount of water supply is increased.

FIG. 15 schematically shows this.
In FIG. 15, the horizontal axis is the feed water flow rate, the vertical axis is the rotational speed of the water wheel 110 and the impeller 88, X shown in the figure is the rotational speed at which the impeller 88 side magnet 178 stops stopping, and Y is the washing. The number of rotations of the impeller 88 that starts to exhibit the effect is shown.
A shows the relationship between the water supply flow rate and the rotation speed when the nozzle 222 with the small nozzle hole 230 diameter is used, and B shows the water supply flow rate and the rotation speed when the nozzle 222 with the large hole diameter of the nozzle hole 230 is used. Shows the relationship.

As indicated by A and B in FIG. 15, the rotational speeds of the water wheel 110 and the impeller 88 increase as the water supply flow rate increases in any case. When the rotational speed exceeds Y, a cleaning effect is produced by the rotation of the impeller 88. When the rotational speed reaches X, the impeller 88 side magnet 178 steps out and stops rotating there.
As shown by A in the figure, when the nozzle 222 having a small hole diameter is used, the rotational speed increases with a relatively small increase in the flow rate, and therefore, cleaning is performed from a relatively early stage (at a stage where the feed water flow rate is low). In addition to the effect, the feed water flow rate when the impeller 88 reaches the rotational speed Y and stops stepping out is also relatively small compared to the case indicated by B.
When the nozzle 222 having a large hole diameter is used, the flow rate of the jet flow of the feed water is not so high as compared with the case where the nozzle 222 having a small hole diameter is used. Slower, and the water supply flow rate at the time of step-out stop increases.

When the nozzle 222 having such a small hole diameter is used, the cleaning effect due to the rotation of the impeller 88 appears at an early stage when the feed water flow rate is increased as shown in A, but the magnet 178, that is, the impeller 88 is removed. The time to reach the adjustment speed is too early.
On the other hand, when the nozzle 222 having a large hole diameter is used, the cleaning effect is delayed as shown in B, but the time to reach the step-out stop rotation speed is also delayed, and the feed water flow rate causing the cleaning effect The range (R ₂ ) is also wider than the range (R ₁ ) shown in FIG.

For example, in the kitchen, there are various people who use the faucet 12 with a large amount of water supply on a daily basis, and some people use the faucet 12 with a small amount of water supply.
By replacing the nozzle 222 accordingly, the step-out stop timing of the impeller 88 can be controlled according to the magnitude of the water supply flow rate to be used.

When the impeller 88 side magnet 178 steps out and stops rotating, the water wheel 110 side magnet 214 enters the idle state. At this time, the water wheel 110 side magnet 214 and the impeller 88 side magnet 178 that are vertically opposed to each other repeat magnetic attraction and repulsion in small increments as the water wheel 110 rotates as shown in FIG.
Accordingly, a vertical excitation force is applied to the rotating shaft 86, and the rotating shaft 86 and the impeller 88 may cause slight vibration.
In the present embodiment, since the weight of the rotating shaft 86 and the impeller 88 is added to the direction of action of the attractive force and the repulsive force of the magnets 178 and 214, the weight of the rotating shaft 86 is increased, etc. Occurrence can be suppressed.

Although the embodiment of the present invention has been described in detail above, this is merely an example.
For example, in the present invention, the impeller may be configured so that a part of the lower side of the rotary blade is located below the edge 60a of the bottom surface of the drainage bowl 32 in some cases.
In addition, the shape of the impeller can be configured in various shapes other than the shape exemplified above.
Furthermore, in the above embodiment, the impeller is driven to rotate by using the force of the flow of water flowing through the water supply passage from the water supply pipe to the faucet spout as power. It is also possible to configure the impeller to rotate.
In addition, this invention can be comprised in the form which added the various change in the range which does not deviate from the meaning.

The present invention can be applied to a sink equipped with a sink, and is effective in preventing slime, bad odor and the like.

10 Sink (water receiving tank)
26 Watermill housing 30, 60 Bottom 32 Drain bowl (drain recess)
62 Drain port 86 Rotating shaft 88 Impeller 92, 116, 178, 214 Magnet 94, 138 Rotating vane 110 Water wheel 126 Inlet 132 Plate-shaped part 134 Drain opening 202 Cylindrical part 222 Nozzle

Claims (7)

1. A drainage recess having a shape partially recessed downward from the bottom of the water receiving tank is constructed, and the water in the water receiving tank is allowed to flow into the drainage recess and drained from a drain outlet formed at the bottom of the drainage recess. A drainage device,
   Inside the concave portion for drainage, there is an impeller that impedes and pushes back the flow of drainage by applying a force by its rotation around the drainage port to the flow of drainage from the bottom of the concave portion for drainage to the drainage port. Provided,
   The impeller has a rotating blade that extends from the rotating shaft side toward the outer peripheral end on the outer peripheral portion around the rotating shaft, and that hits the rotating direction against the drainage, and the drain port on the inner peripheral side. A drainage device having a drainage opening communicating with the vertical direction and penetrating vertically.
2. The drainage device according to claim 1,
   The impeller has a plate-like portion having an annular shape in the circumferential direction at the outer peripheral portion, the rotating blade is provided on the lower surface of the plate-like portion, and radially inward of the plate-like portion. A drainage device having the drainage opening.
3. The drainage device according to claim 1 or 2,
   The said impeller is rotationally driven by the driving force different from the force of the flow of the said waste_water | drain which goes inside the said recessed part for waste_water | drains toward the said drain outlet, The drainage device characterized by the above-mentioned.
4. A drainage device according to claim 3,
   The impeller is rotationally driven with the force of water flow in a water supply pipe for supplying water into the water receiving tank as the driving force,
   A water wheel that rotates by the force of water flow is provided in the water supply flow path in the water supply pipe, and a water wheel side magnet is provided in the water wheel in an integrally rotating state, and the blade is disposed at a position separated from the water wheel side magnet by a partition. An impeller side magnet that rotates integrally with a wheel is provided, the water wheel side and the impeller side are magnetically coupled, and the driving force from the water wheel is transmitted to the impeller to rotate the impeller. Drainage device.
5. The drainage device according to claim 4,
   The water wheel is housed in a water wheel housing having a cylindrical portion centered on the rotation axis of the water wheel;
   A drainage device characterized in that a nozzle for ejecting the flow of the water supply toward the water wheel is provided at an inlet of the water supply provided in the cylindrical portion.
6. The drainage device according to claim 4,
   The water wheel side magnet and the impeller side magnet are configured in a disk shape, and the water wheel side magnet and the wheel wheel side magnet are arranged in a state where the disk surfaces face each other in the axial direction of the rotating shaft extending in the vertical direction. Drainage device characterized by that.
7. The drainage device according to claim 5,
   The water wheel side magnet and the impeller side magnet are configured in a disk shape, and the water wheel side magnet and the wheel wheel side magnet are arranged in a state where the disk surfaces face each other in the axial direction of the rotating shaft extending in the vertical direction. Drainage device characterized by that.

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