JP2021098957A - Drainage system - Google Patents

Abstract

To provide a drainage system capable of improving the washing performance near a water seal water level where dirt is easily attached.SOLUTION: The drainage system includes: a water seal formation part 10 provided downstream of a water receiving part and having a flow path formed inside, to form water seal in the flow path; an ultrasonic wave oscillator 26 for irradiating water in the water seal formation part with ultrasonic waves; and a water level adjustment part 19 formed to raise a water level in the water seal formation part from a water seal water level W0 to an ultrasonic wave washing water level W2 higher than the water seal water level with water flowing into the water seal formation part. The water seal formation part 10 includes a metal inside face at least at the water seal water level.SELECTED DRAWING: Figure 6

Description

The present invention relates to a drainage device, and more particularly to a drainage device provided below the water receiving portion.

Conventionally, as shown in Patent Document 1, a drainage device provided on the bottom surface of a sink and provided with an ultrasonic transmitter is known. In such a drainage device, the inside of the drainage portion can be cleaned by an ultrasonic oscillator.

Japanese Unexamined Patent Publication No. 2004-324108

Here, it is known that in a drain trap of a drainage device as shown in Patent Document 1, dirt easily adheres to the vicinity of the sealing water level, and moreover, the dirt adhering to the vicinity of the sealing water level dries and becomes difficult to remove. There is.
At this time, as shown in Patent Document 1, the drainage device is formed of a resin member. Therefore, the inner wall surface near the sealing water level is also formed of the resin member. There is a problem that the resin member of the inner wall surface near the sealing water level absorbs ultrasonic waves, and the cleaning performance of the inner wall surface near the sealing water level where dirt easily adheres is deteriorated.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a drainage device capable of improving cleaning performance in the vicinity of a sealing water level where dirt easily adheres.

In order to solve the above-mentioned problems, the present invention is a drainage device provided below the water receiving portion, which is provided downstream of the water receiving portion, has a flow path formed inside, and is inside the flow path. The water level in the water seal forming part is sealed by the water seal forming part that forms the water seal, the ultrasonic oscillator that irradiates the water in the water seal forming part with ultrasonic waves, and the water that flows into the water seal forming part. The water level adjusting portion is formed so as to raise the water level from the water level to the ultrasonic cleaning water level higher than the sealing water level, and the sealing water forming portion is provided with an inner surface of metal at least at the sealing water level. It is characterized by being.
According to one embodiment of the present invention configured in this way, the water-sealing forming portion includes a metal inner wall surface at least at the water-sealing water level. As a result, ultrasonic waves can be easily reflected by the inner wall surface of the metal near the sealing water level where dirt is likely to adhere. Therefore, it is possible to improve the cleaning performance in the vicinity of the sealing water level where dirt easily adheres.

In the present invention, preferably, the inner surface of the metal of the water-sealing forming portion is formed by providing the metal member inside the inner wall of the water-sealing forming portion.
According to one embodiment of the present invention configured in this way, the inner wall of the water sealing forming portion of the drainage device is generally formed of resin. If the inner surface of the metal is formed on the water-sealing forming portion, and if a part of the inner wall of the water-sealing forming portion is to be partially changed to the metal inner wall, the metal inner wall and other resin of the water-sealing forming portion are to be formed. A connection part is required between the inner wall and the connection part, and there is a risk of water leakage from the connection part. If such a connecting portion is adopted, there is a problem that the manufacturing process is troublesome and the number of parts of the drainage device is increased in order to ensure the watertightness of the connecting portion. On the other hand, the inventor of the present invention has studied to cover the entire inner wall of the water-sealing forming portion with a metal layer so that not all of the water-sealing forming portion is made of a metal member. However, there is a problem that it is relatively difficult to cover the entire inner wall of the water sealing forming portion with the metal layer in terms of manufacturability and cost. On the other hand, according to the configuration of one embodiment of the present invention, the inner surface of the metal of the water-sealing forming portion is formed by providing the metal member inside the inner wall of the water-sealing forming portion. As a result, the inner surface of the metal can be relatively easily attached to the inside of the inner wall of the water sealing forming portion. Therefore, in order to form the inner surface of the metal of the water-sealing forming portion, it is not necessary to provide a connecting portion between the inner wall of the metal and the inner wall of another resin of the water-sealing forming portion. Therefore, when forming the inner surface of the metal of the water-sealing forming portion, the risk of water leakage can be suppressed, the decrease in manufacturability can be suppressed, and the increase in production cost can be suppressed.

In the present invention, preferably, the upper end of the inner surface of the metal of the water sealing forming portion is formed at a position higher than the ultrasonic cleaning water level.
According to one embodiment of the present invention configured in this way, the upper end of the inner side surface of the metal of the water seal forming portion is formed at a position higher than the ultrasonic cleaning water level, so that the inside of the water seal forming portion is formed. When the water level rises to the ultrasonic cleaning water level, ultrasonic waves can be easily reflected by the inner wall surface of the metal at the ultrasonic cleaning water level where dirt easily adheres, and the ultrasonic waves reflected by the water surface can be further reflected by the inner surface of the metal. It can be reflected and the cleaning performance near the ultrasonic cleaning water level can be improved.

According to the drainage device of the present invention, it is possible to improve the cleaning performance in the vicinity of the sealing water level where dirt is likely to adhere.

It is a front view which looked at the drainage system provided with the drainage device by one Embodiment of this invention from the front. It is a side view which looked at the drainage system provided with the drainage device by one Embodiment of this invention from the side. FIG. 5 is an exploded perspective view showing a state in which the lid and the net cage are removed from the water sealing forming portion as viewed from diagonally above the sink with the drainage device according to the embodiment of the present invention attached to the sink. It is sectional drawing seen along the IV-IV line of FIG. It is sectional drawing seen along the VV line of FIG. It is an enlarged cross-sectional view which shows the vicinity of the sealing water forming part of FIG. 4 enlarged. It is a block diagram which shows schematic structure of the drainage system provided with the drainage device by one Embodiment of this invention. It is sectional drawing seen along the line VIII-VIII of FIG. A schematic showing the positional relationship between the inner wall surface near the sealing water level W0 in the descending flow path and the flat surface in a plan view of the descending flow path of the water sealing forming portion of the drainage device according to the embodiment of the present invention. It is a block diagram. In the first modification of the flat surface portion of the water sealing forming portion of the drainage device according to the embodiment of the present invention, when the descending flow path of the sealing water forming portion is viewed from above in a plan view, the water sealing water level W0 in the descending flow path is near. It is a schematic block diagram which shows the positional relationship between the inner wall surface | surface part, and a flat surface part. In the second modification of the flat surface portion of the water sealing forming portion of the drainage device according to the embodiment of the present invention, when the descending flow path of the sealing water forming portion is viewed from above, the water sealing water level in the descending flow path is near W0. It is a schematic block diagram which shows the positional relationship between the inner wall surface | surface part and a flat surface part. In the third modification of the flat surface portion of the water sealing forming portion of the drainage device according to the embodiment of the present invention, when the descending flow path of the sealing water forming portion is viewed from above in a plan view, the water sealing water level W0 in the descending flow path is near. It is a schematic block diagram which shows the positional relationship between the inner wall surface | surface part, and a flat surface part.

Hereinafter, embodiments of the present invention disclosed herein will be described in detail with reference to the drawings. From the following description, many improvements and other embodiments of the present invention will be apparent to those skilled in the art. Therefore, the following description should be construed as an example only and is provided for the purpose of teaching those skilled in the art the best aspects of carrying out the present invention. The details of its structure and / or function can be substantially modified without departing from the spirit of the present invention.

Hereinafter, a drainage system including a drainage device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a front view of the drainage system provided with the drainage device according to the embodiment of the present invention from the front, and FIG. 2 is a side view of the drainage system provided with the drainage device according to the embodiment of the present invention from the side. It is a figure.
As shown in FIGS. 1 and 2, the drainage system 2 which is a drainage system unit including the drainage device 1 according to the embodiment of the present invention is provided in the kitchen. The drainage system 2 is a system that performs ultrasonic cleaning.

The drainage system 2 includes a sink 4 which is a water receiving part for receiving water, a kitchen faucet device 6 which is a water discharging part for discharging water or hot water to the sink 4, and a drainage device provided below the bottom 4a of the sink 4. 1 and a drainage flow path 8 provided on the downstream side of the drainage device 1 are provided.

The sink 4 is formed so as to discharge the water discharged from the kitchen faucet device 6 to the downstream side. The kitchen faucet device 6 is connected to a water supply channel 9 to which water is supplied from a water supply source (not shown) and a hot water supply channel 11 to which hot water is supplied on the upstream side. The kitchen faucet device 6 includes a hot water mixing faucet 6a, mixes water from the water supply channel 9 with hot water from the hot water supply channel 11, and discharges water from the water discharge unit 6b. The water supply channel 9 and the hot water supply channel 11 once extend upward and are connected to the hot water mixing tap 6a, and the water discharge side flow path 6c extends downward from the hot water mixing tap 6a and passes through the flow rate sensor 24 described later to the water discharge unit. It rises again to 6b and extends. The kitchen faucet device 6 further includes an operation lever 6d, which is a manual operation unit that starts supplying water to the water seal forming unit 10 by an operation input of the user.

The drainage flow path 8 is connected to the downstream end of the drainage device 1 and extends downward in the vertical direction. The drainage flow path 8 is further connected to a drainage pipe (not shown) on the downstream side.

Next, the drainage device according to the embodiment of the present invention will be described with reference to FIGS. 3 to 8.
FIG. 3 is an exploded perspective view showing a state in which the lid and the net cage are removed from the water sealing forming portion as viewed from diagonally above the sink with the drainage device according to the embodiment of the present invention attached to the sink. 4 is a cross-sectional view taken along line IV-IV of FIG. 1, FIG. 5 is a cross-sectional view taken along line V-V of FIG. 2, and FIG. FIG. 7 is an enlarged cross-sectional view showing an enlarged view, FIG. 7 is a block diagram schematically showing the structure of a drainage system provided with a drainage device according to an embodiment of the present invention, and FIG. 8 is a line VIII-VIII of FIG. It is a cross-sectional view seen along.

The water sealing forming portion 10 is connected to the bottom portion 4a. First, the drainage device 1 includes a water sealing forming portion 10 provided on the downstream side of the bottom portion 4a of the sink 4. A flow path is formed inside the water sealing forming portion 10. A part of the water sealing forming portion 10 is formed by a cylindrical recessed portion 4b that is recessed downward from the bottom portion 4a. The water sealing forming portion 10 may be connected to the bottom portion 4a without passing through the recessed portion 4b. A water supply flow path different from the flow path from the sink 4 may be connected to the water seal forming portion 10. This other water supply channel is connected to another water source (not shown) or the same water source. The water flowing into the sealing water forming portion 10 also includes water supplied from a water supply flow path different from the flow path from the sink 4. Further, the water flowing into the sealing water forming portion 10 includes water containing any of detergent, shampoo, body soap, tableware stains, stains on the water receiving portion, and the like, for example, domestic wastewater.

The water-sealing forming portion 10 is provided on the lower side of the sink 4, and is a hollow portion in which the net cage is arranged. The net cage storage portion 12, the descending flow path 14 descending on the inlet side, and the descending flow path 14 An ascending flow path 16 that rises diagonally upward from the lower end of the ascending flow path 16 and an outlet flow path 18 that descends from the upper end of the ascending flow path 16 are provided. The water-sealing forming portion 10 forms a drainage flow path 22 by the descending flow path 14, the ascending flow path 16, and the outlet flow path 18, and forms a water-sealing in the flow path. The water seal forming unit 10 has a function of draining the water discharged into the sink 4 and storing a part of the inflowed water to form a normal water seal at the water seal water level W0 inside the sink 4. The sealing water level W0 is defined by the top 17 forming a folded portion between the ascending flow path 16 and the outlet flow path 18. A water level adjusting portion 19 described later is formed on the top portion 17. The outlet flow path 18 extends substantially downward in the vertical direction and is connected to the drainage flow path 8. The water sealing forming portion 10 is made of resin. At the interface between resin and water, the difference between the density of the resin and the density of water is relatively closer than the difference between the density of metal and the density of water, so ultrasonic waves are absorbed by the resin compared to metal. It is easy to reduce the sound pressure of ultrasonic waves in the vicinity of the resin member of the water sealing forming portion 10. Therefore, the ultrasonic cleaning performance in the vicinity of the resin member is relatively liable to be deteriorated.

As shown in FIGS. 3 and 5, the net cage storage portion 12 is formed in a size such that the net cage 21 can be arranged inside. The entrance of the net cage storage portion 12 is opened in a square shape to form a drainage port portion of the sink 4. The net cage storage portion 12 is formed by further denting a part of the bottom portion 4a downward. The net cage storage portion 12 is formed in a quadrangular tubular shape.

As shown in FIG. 4, the sealing water forming portion 10 forms a trap-shaped flow path that forms a sealing water at the sealing water level W0. The drainage device 1 is further arranged on a lid 23 which is a lid portion formed so as to cover above the entrance of the net cage storage portion 12 of the water sealing forming portion 10 and a flow path in the net cage storage portion 12. The net cage 21 having a mesh, the flow rate sensor 24 (see FIG. 1) which is a detection unit for detecting the water discharged from the kitchen faucet device 6, and the water in the water seal forming unit 10 are irradiated with ultrasonic waves. It includes an ultrasonic oscillator 26 and a control device 28 (see FIG. 1) that controls irradiation of ultrasonic waves by the ultrasonic oscillator 26.

The lid 23 is provided so as to be removable from the net cage storage portion 12. The lid 23 is attached to the upper part of the net cage 21 so that the net cage 21 is difficult to see from above. The lid 23 forms a hole (not shown) into which a small object such as water or dust flows in from the inlet of the upper end of the net cage storage portion 12.

The upper end of the net cage 21 is arranged inside the entrance portion, and the upper end thereof is formed so as to substantially match the entrance portion. Therefore, the net cage 21 is formed so as to cover the entire flow path on the lower side of the inlet portion. The net cage 21 has a plurality of pores formed therein, and allows water flowing in from the sink 4 to pass through the net cage 21 without passing small objects such as dust contained in the water flowing in from the sink 4 into the net cage 21. It is designed to collect. The net cage 21 is formed in a quadrangular shape when viewed from above. The net cage 21 can be changed to a dust catching member having an arbitrary shape having a function of catching dust and the like.

The flow rate sensor 24 detects the flow of water supplied to the sealing water forming unit 10 or the flow of water flowing out of the sealing water forming unit 10. The flow rate sensor 24 is provided between the hot water mixing tap 6a and the water spouting portion 6b of the kitchen faucet device 6. The flow rate sensor 24 can detect the flow rate of water discharged from the water discharge unit 6b of the kitchen faucet device 6 per unit time. In this way, the flow rate sensor 24 can detect that water is discharged from the water discharge unit 6b by detecting the flow rate per unit time. In this way, the flow rate sensor 24 detects the water discharged from the water discharge unit 6b, so that the supply of water to the water sealing forming unit 10 can be detected. The flow rate sensor 24 is electrically connected to the control device 28.

The ultrasonic oscillator 26 is provided below the descending flow path 14 of the water sealing forming portion 10. The ultrasonic oscillator 26 is provided at the bottom of the water sealing forming portion 10 and is arranged so as to irradiate ultrasonic waves mainly toward the descending flow path 14. The ultrasonic oscillator 26 includes an ultrasonic oscillating element 20 and a vibrating member 31.

The ultrasonic oscillating element 20 is formed of a circular plate-shaped member. The ultrasonic oscillating element 20 is provided so as to come into contact with a flat surface portion 34 described later of the vibrating member 31 by, for example, an adhesive or welding. The ultrasonic oscillating element 20 is made of, for example, piezoelectric ceramics, ferrite, or the like, and expands and contracts in the radial direction due to cavitation when an AC voltage is applied. A pair of wires 29 extend from the ultrasonic oscillating element 20, and the wires 29 are electrically connected to the control device 28. The frequency of the ultrasonic oscillator 26 is about 20 k to 100 kHz.

The control device 28 has a built-in CPU, memory, and the like, has a function of receiving a detection signal transmitted from the flow sensor 24, and controls the operation of the ultrasonic oscillator 26 based on a predetermined control program and the like stored in the memory. To do. The control device 28 controls the irradiation of ultrasonic waves and the stop of irradiation by the ultrasonic oscillator 26. The control device 28 includes an automatic cleaning mode that automatically irradiates the ultrasonic oscillator 26 in response to the detection of water by the flow rate sensor 24, and the automatic cleaning mode causes the start of water discharge from the kitchen faucet device 6. It can be automatically linked with the start of ultrasonic cleaning.

Next, the water level adjusting unit of the drainage device according to the embodiment of the present invention will be described with reference to FIGS. 6 and 8.
In the water level adjusting unit 19, for example, when the amount of water flowing into the sealing water forming unit 10 is equal to or higher than a predetermined flow rate, the water flowing into the sealing water forming unit 10 causes the water level in the sealing water forming unit 10 to form a sealing water. It is formed so as to raise from the sealing water level W0 in the portion 10 to the ultrasonic cleaning water level W1 higher than the sealing water level W0 in the sealing water forming portion 10. This predetermined flow rate is set to a relatively low flow rate with respect to the water discharge flow rate discharged from the water discharge unit 6b in the normal usage mode. Since the water level adjusting unit 19 has a function of adjusting the water level according to the structure of the flow path without opening and closing the flow path by an electric solenoid valve or the like, the water sealing forming unit 10 of the water does not depend on the operation of the user or the like. The water level can be adjusted automatically according to the inflow.

As shown in FIG. 8, the water level adjusting portion 19 is formed on the top portion 17 that defines the sealed water level W0. The water level adjusting unit 19 includes a wall 30 that narrows the flow path in the water sealing forming unit 10. The wall 30 forms a squeezing portion that narrows the lower side of the flow path in the water sealing forming portion 10. The wall 30 is formed so as to rise upward from the top 17 when viewed from the front. Further, the wall 30 is formed so as to rise obliquely backward and upward from the top 17 in a side view. A notch 33 is formed between the walls 30, and the bottom of the notch 33 is a top 17. The wall 30 may be formed so that, for example, the side wall on the upper side of the top 17 of the water sealing forming portion 10 projects inward to narrow the flow path, and for example, the top 17 leaves a space on the side wall side. It may be formed so as to narrow the flow path by rising upward from the water.

Water that cannot pass through the notch 33 with respect to the amount of water discharged from the water discharge unit 6b (the amount of inflow per unit time that flows into the seal water forming unit 10) in the normal use mode is inside the water seal forming unit 10. When the water level exceeds the upper end 30a, a flow exceeding the upper end 30a of the wall 30 portion is also formed. The wall 30 limits the amount of drainage for a unit time passing through the notch 33 when the water level is at a height of 30a or less at the upper end, and the flow exceeds 30a at the upper end when the water level exceeds 30a at the upper end. A special weir is formed. When the water level exceeds the upper end 30a, the water that cannot pass through the notch 33 forms a flow that exceeds the upper end 30a with respect to the amount of water discharged (the amount of inflow per unit time that flows into the sealing water forming portion 10). Therefore, the further rise in water level is suppressed. The water level adjusting unit 19 is formed so that the ultrasonic cleaning water level W1 is located in the net cage storage unit 12. Therefore, the dirt that adheres when the ultrasonic cleaning water level is W1 adheres to the inside of the net cage storage portion 12, so that the user can relatively easily clean the dirt.
Further, as a modification, the water level adjusting unit 19 can be formed by means different from the wall 30, for example, an electric solenoid valve, a flow path adjusting valve, or the like. At this time, based on the control device 28 determining the detection of water, the control device 28 closes the solenoid valve, the flow path adjusting valve, or the like provided in the water sealing forming unit 10 to form the water sealing forming unit 10. It may be controlled to raise the water level in the water level and raise the water level to the ultrasonic cleaning water level W1. Further, for example, the control device 28 controls the opening and closing of the solenoid valve and the like so that the water does not flow back to the sink 4 side when the water level rises to the ultrasonic cleaning water level W1. The rise in water level may be suppressed.

Next, with reference to FIGS. 5 and 6, the vibrating member 31 of the drainage device and the vibrating member 31 in the water sealing forming portion 10 according to the embodiment of the present invention will be described.
The vibrating member 31 constitutes a part of the inner wall forming the drainage flow path 22 inside the water sealing forming portion 10 in a state of being arranged in the communication hole 10a formed on the bottom surface of the water sealing forming portion 10. The vibrating member 31 is formed on a flat surface portion 34 which is a diaphragm forming a part of an inner wall forming a drainage flow path 22 inside the communication hole 10a in a state of being arranged in the communication hole 10a, and on the outer edge of the flat surface portion 34. It includes a first curved portion 36 provided, and a mounting surface portion 38 formed from the first curved portion 36 in a direction different from that of the flat surface portion 34.

The flat surface portion 34 is formed in a circular flat plate shape. The flat surface portion 34 is provided at the bottom of the flow path of the water sealing forming portion 10, and forms the bottom surface of the descending flow path 14 and the ascending flow path 16. Further, as shown in FIG. 6, the ultrasonic oscillating element 20 is attached to the outer surface (outside the drainage flow path 22) of the flat surface portion 34. This outer surface is the surface opposite to the surface that comes into contact with the sealing water. The flat surface portion 34 is formed of a thin plate of a metal material such as stainless steel. The flat surface portion 34 is arranged substantially horizontally. The flat surface portion 34 vibrates in the direction perpendicular to the radial direction (for example, in the vertical direction) as the ultrasonic oscillating element 20 expands and contracts in the radial direction. Therefore, the flat surface portion 34 constitutes an ultrasonic oscillator 26 that irradiates water with ultrasonic waves by vibrating together with the ultrasonic oscillating element 20.

Next, with reference to FIGS. 6 and 9, the relationship between the flat surface portion 34 and the inner wall surface of the sealing water forming portion 10 near the sealing water level W0 will be described.
FIG. 9 shows the positions of the inner wall surface near the sealing water level W0 in the descending flow path and the flat surface portion in a plan view of the descending flow path of the water sealing forming portion of the drainage device according to the embodiment of the present invention. It is a schematic block diagram which shows the relationship.
In FIG. 9, in order to clearly show the positional relationship between the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 and the flat surface portion 34, the sealing water forming portion 10 other than these portions is shown. The structure of is omitted from the illustration.

As shown in FIG. 6, the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 forms a protruding portion 40 projecting toward the center of the descending flow path 14. The protruding portion 40 is provided at the inlet portion of the descending flow path 14, and its inner end 40a is formed on the upper side of the sealing water level W0. The entire circumference of the inner wall surface 32 near the sealing water level W0 of the sealing water forming portion 10 projects toward the center side of the flow path in the sealing water forming portion 10. Therefore, the protruding portion 40 is formed in a tubular shape over the entire circumference of the inner wall surface 32. Since the protruding portion 40 is formed toward the center from the inner wall surface 32, the inner end 40a of the protruding portion 40 is formed in an annular shape inside the inner wall surface 32, and is formed from the descending flow path 14 on the inner wall surface 32 on the downstream side. Also forms a reduced diameter descending flow path 14. The protruding portion 40 is a portion where the inner wall surface 32 near the sealing water level W0 of the sealing water forming portion 10 projects inward. The protrusion 40 includes an inclined surface 42 that extends from the inner end 40a of the protrusion 40 toward the downstream end 40b on the downstream side and is inclined upward and inward from the downstream end 40b. Therefore, the inclined surface 42 is formed in an annular shape and diagonally downward. The inclined surface 42 is directed toward the ultrasonic oscillator 26 at the bottom.

The vicinity of the sealing water level W0 of the sealing water forming portion 10 is, for example, at least the sealing water level W0, and is, for example, a region within a range of about 0 to about 1 cm in the vertical direction from the sealing water level W0, respectively. Further, for example, it may be a region from the sealing water level W0 to the lower end portion of the recessed portion 4b. Further, the vicinity of the sealing water level W0 where the protrusion 40 is formed may be formed only in the region above the sealing water level W0.

As shown in FIG. 9, in the plan view, the center position C1 of the flat surface portion 34 is different from the center position C2 of the descending flow path 14 at the sealing water level W0 of the sealing water forming portion 10. .. The center position C1 of the flat surface portion 34 is the center position of the circular flat surface portion 34. The flat surface portion 34 is not limited to a circular shape and may have another shape. Further, the center position of the flat surface portion 34 may be defined by another method. The center position C2 of the flow path at the sealing water level W0 of the sealing water forming portion 10 is the center position of the substantially circular descending flow path 14 at the sealing water level W0 (the intersection of the sealing water level W0 and the central axis of the descending flow path 14). Position). In a plan view, the central position C1 is arranged at a position deviated from the central position C2 to the downstream side (top 17 side of FIG. 4) of the water sealing forming portion 10.

As shown in FIG. 9, a first virtual line D1 (indicated by a dotted line) and a first virtual line connecting the center position C1 of the flat surface portion 34 and the center position C2 of the descending flow path 14 at the sealing water level W0 in a plan view. A second virtual line D2 orthogonal to D1 is virtually defined. The second virtual line D2 passes through the central position C2 of the descending flow path 14 at the sealed water level W0. In a plan view, of the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10, the side opposite to the side where the center position C1 of the plane portion 34 is located with respect to the second virtual line D2. At least a part of the inner wall surface 32 in the above forms a projecting portion 40, and projects toward the center side of the descending flow path 14. The region E on the side opposite to the side where the center position C1 of the plane portion 34 is located with respect to the second virtual line D2 is shown in FIG.
In a plan view, a portion of the inner wall surface 32 near the sealing water level W0 that does not overlap with the flat surface portion 34 (the portion indicated by the region A1) forms a protruding portion 40. Further, in the plan view, the protruding portion 40 is also formed on the portion of the inner wall surface 32 of the sealing water forming portion 10 near the sealing water level W0 that overlaps with the flat surface portion 34 (the portion indicated by the region A2).

In FIG. 6, the shape of the inner wall surface 32 when the protrusion 40 is not formed is shown by the virtual line B for the purpose of comparison with the technique of the present application. The distance L1 between the protruding portion 40 of the region A1 and the flat surface portion 34 (for example, the end portion of the flat surface portion 34) is the inner wall surface 32 indicated by the virtual line B and the flat surface portion 34 (for example, the end portion of the flat surface portion 34). It is shorter than the distance L2. In this way, since the protruding portion 40 protrudes from the inner wall surface 32, the distance between the inclined surface 42 and the flat surface portion 34 is such that the protruding portion 40 is not formed on the inner wall surface 32 (the inner wall surface 32 is a virtual line). It is shorter than (when it becomes B). Even if the difference between the distance L1 and the distance L2 is relatively small, the attenuation of the sound pressure of the ultrasonic waves reaching the inner wall surface 32 is suppressed, and the detergency by the ultrasonic waves in the vicinity of the protruding portion 40 is improved. Further, the distance between most of the protruding portions 40 in the region A2 and the flat surface portion 34 (for example, the end portion of the flat surface portion 34) is also the distance between the inner wall surface 32 indicated by the virtual line B and the flat surface portion 34 (for example, the flat surface portion 34). It is shorter than the distance to the end). Even if the distance between a part of the protruding portion 40 and the flat surface portion 34 is longer than the distance between the inner wall surface 32 indicated by the virtual line B and the flat surface portion 34, the protruding portion 40 as a whole The attenuation of the sound pressure of the ultrasonic waves reaching the inner wall surface 32 is suppressed, and the cleaning power of the ultrasonic waves in the vicinity of the protruding portion 40 is improved.

Similarly, the distance L3 between the protruding portion 40 of the region A1 and the center position C1 of the flat surface portion 34 is shorter than the distance L4 between the inner wall surface 32 indicated by the virtual line B and the center position C1 of the flat surface portion 34. Has been done. Even if the difference between the distance L3 and the distance L4 is relatively small, the attenuation of the ultrasonic waves with a relatively strong sound pressure reaching the inner wall surface 32 from the center position C1 of the flat surface portion 34 that irradiates the ultrasonic waves with a relatively strong sound pressure. It is suppressed and the detergency by ultrasonic waves in the vicinity of the protruding portion 40 is improved. Further, the distance between most of the protruding portions 40 in the region A2 and the center position C1 of the plane portion 34 is also shorter than the distance between the inner wall surface 32 indicated by the virtual line B and the center position C1 of the plane portion 34. Has been done. Even if the distance between a part of the protruding portion 40 and the center position C1 of the flat surface portion 34 is longer than the distance between the inner wall surface 32 indicated by the virtual line B and the center position C1 of the flat surface portion 34. As a whole, the protrusion 40 suppresses the attenuation of the ultrasonic waves having a relatively strong sound pressure reaching the inner wall surface 32 from the center position C1 of the flat surface portion 34 that irradiates the ultrasonic waves with a relatively strong sound pressure, and is in the vicinity of the protruding portion 40. The detergency by ultrasonic waves is improved.

Next, with reference to FIG. 6, the metal surface provided in the water sealing forming portion 10 will be described.
The water-sealing forming portion 10 further includes a metal surface 50 which is an inner surface of the metal at least at the water-sealing water level W0. The area of the metal surface 50 is shown by diagonal lines in FIG. 6 in order to show the portion in an easy-to-understand manner. The metal surface 50 is formed by providing a thin plate-shaped metal member 52 inside the inner wall surface 32 of the water sealing forming portion 10. The metal surface 50 forms the inner surface of the metal member 52. The metal member 52 is formed in an annular shape. The metal surface 50 may be formed of a metal foil coated on a part of the inner wall of the water sealing forming portion 10. The metal member 52 (metal surface 50) is made of a metal such as stainless steel. On the other hand, the portion of the water sealing forming portion 10 other than the metal surface 50 is formed of a non-metal resin. The metal surface 50 is not only provided inside the inner wall surface 32 of the water sealing forming portion 10, but is also formed by partially forming a part of the inner wall surface 32 of the water sealing forming portion 10 with metal. May be good.

The metal surface 50 is formed over the entire circumference. As a modification, the metal surface 50 may not be formed over the entire circumference, such as having a notch in a part of the entire circumference.

The lower end of the metal member 52 (metal surface 50) is located at substantially the same height as the sealing water level W0. The lower end of the metal member 52 (metal surface 50) is preferably located below the sealing water level W0. Further, a part of the lower end of the metal member 52 may not be located near the sealing water level W0, and the other portion may not be located near the sealing water level W0. For example, although a part of the lower end of the metal member 52 is located at the sealing water level W0 due to the inclination of the sealing water forming portion 10 at the time of installation, the other portion may be located above the sealing water level W0. ..

The upper end of the metal member 52 (metal surface 50) is formed at a position higher than the ultrasonic cleaning water level W1. The space inside the net cage storage portion 12 is a space that is relatively easy for the user to clean, is easy for the user to maintain clean, and can suppress the manufacturing cost of the metal plate. Therefore, the metal member 52 (metal surface 50). ) May be formed at the same height as the ultrasonic cleaning water level W1 or at a position lower than the ultrasonic cleaning water level W1. For example, the upper end of the metal member 52 (metal surface 50) may be formed at the lower end of the net cage storage portion 12 which is difficult for the user to clean, that is, at the tip of the protruding portion 40 which is the entrance of the descending flow path 14.

As described above, in the present embodiment, the metal member 52 is formed from substantially the same height as the sealing water level W0 to a height higher than the ultrasonic cleaning water level W1. Therefore, the metal member 52 also covers the inside of the protruding portion 40. For example, such a metal member 52 is formed so as to include at least a height region from the upper side of the sealing water level W0 to the lower side of the tip of the protrusion 40.

By forming the metal surface 50 in this way, the difference between the density of the metal surface and the density of water becomes relatively large at the interface between the metal surface 50 and water, and ultrasonic waves are easily reflected by the metal surface 50. It is possible to increase the sound pressure of ultrasonic waves in the vicinity of the metal surface 50. Therefore, the ultrasonic cleaning performance in the vicinity of the metal surface 50 is improved.

Next, the operation (action) of the drainage system including the drainage device 1 according to the above-described embodiment of the present invention will be described with reference to FIGS. 4, 6, and 8.

FIG. 4 shows a standby state before water is discharged from the kitchen faucet device 6. In the standby state, the water level in the sealing water forming portion 10 is the sealing water level W0 at the position of the top 17 of the sealing water forming portion 10. In the standby state, the kitchen faucet device 6 is in a state of being stopped, and the ultrasonic oscillator 26 is also in a state of being stopped.

For example, in the standby state, when the user causes the sink 4 to flow water containing dirt by operating the operation lever 6d, the water flows into the sealing water forming portion 10. For example, dirt adheres to the net cage 21, the net cage storage portion 12, the water sealing forming portion 10, and the like.

When water is discharged from the kitchen faucet device 6, water is supplied from the bottom 4a of the sink 4 to the sealing water forming portion 10. Since water flows into the sealing water forming portion 10, the water level starts to rise from the sealing water level W0, and the water exceeding the top 17 of the sealing water forming portion 10 as shown in FIG. 8 cuts the water level adjusting portion 19. It is discharged to the drainage channel 8 side through the notch 33.

Here, when the inflow amount of water per unit time that exceeds the first drainage amount per unit time that can pass through the notch 33 of the water level adjusting unit 19 flows into the sealing water forming unit 10, the water flows out from the notch 33. The water level in the sealing water forming portion 10 is automatically raised. In this way, the water level automatically rises without any user operation to raise the water level. Therefore, when water is supplied into the sealing water forming unit 10, the water level in the sealing water forming unit 10 automatically reaches the ultrasonic cleaning water level W1 based on the configuration of the water level adjusting unit 19, and the water is sealed. Ultrasonic cleaning can be automatically performed up to the inner wall surface near the water level W0.

As shown in FIG. 8, the water level adjusting unit 19 raises the water level in the sealing water forming unit 10 to the ultrasonic cleaning water level W1 higher than the upper end 30a by the water flowing into the sealing water forming unit 10. When the water level in the sealing water forming portion 10 is higher than the upper end 30a of the wall 30, the water is discharged downstream from the entire width of the sealing water forming portion 10 in the left-right direction so as to get over the upper end 30a. Therefore, since the amount of drainage per unit time that can be discharged increases, a further rise in the water level can be suppressed.

The control device 28 irradiates the ultrasonic oscillator 26 with the water level in the sealing water forming portion 10 reaching the ultrasonic cleaning water level W1. As a result, ultrasonic cleaning can be performed in a state where the vicinity of the sealing water level W0 where dirt easily adheres is flooded, and ultrasonic cleaning can be performed even if the user does not manually clean the vicinity of the sealing water level W0 where dirt easily adheres. It can be washed by washing.

Since the ultrasonic cleaning water level W1 is located in the net cage storage portion 12, the range where dirt remains in the vicinity of the ultrasonic cleaning water level W1 is controlled in the net cage storage portion 12 where the user can easily clean. it can. On the other hand, the cleaning power of the ultrasonic oscillator 26 can be enhanced in the portion of the sealing water forming portion 10 below the ultrasonic cleaning water level W1 (particularly downstream from the descending flow path 14) that is difficult for the user to clean. .. In the present embodiment, as described above, by forming the protruding portion 40, the attenuation of the sound pressure of the ultrasonic waves reaching the vicinity of the protruding portion 40 is suppressed, and the cleaning power of the ultrasonic waves in the vicinity of the protruding portion 40 is improved. Has been done.

When the inflow of water into the sealing water forming portion 10 is completed, the water level in the sealing water forming portion 10 automatically starts to decrease from the ultrasonic cleaning water level W1. As shown in FIG. 6, when the water level in the sealing water forming portion 10 drops to the sealing water level W0, the outflow of water from the notch 33 ends, and the drainage device 1 returns to the standby state.

Next, a first modification of the vibrating member 31 of the drainage device 1 according to the embodiment of the present invention will be described with reference to FIGS. 6 and 10.
FIG. 10 shows a first modification of the flat surface portion of the water sealing forming portion of the drainage device according to the embodiment of the present invention, in which the descending flow path of the water sealing forming portion is viewed from above in a plan view. It is a schematic block diagram which shows the positional relationship between the inner wall surface near a water level W0 and a flat surface part.
In FIG. 10, in order to clearly show the positional relationship between the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 and the flat surface portion 134, the sealing water forming portion 10 other than these portions is shown. The structure of is omitted from the illustration. As will be described later, the structure of the water seal forming portion 10 other than the position of the flat surface portion 134 is the same as that of the water seal forming portion 10 of the drainage device 1 according to the embodiment, and thus will be described with reference to FIG.

The flat surface portion 34 of the vibrating member 31 of the drainage device 1 according to the embodiment of the present invention is arranged so as to overlap the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 in a plan view. In the first modification, the flat surface portion 134 of the vibrating member 131 is arranged so as not to overlap the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 in a plan view.

Since the drainage device 1 according to the first modification of the embodiment has a similar basic structure to the drainage device 1 according to the above-described embodiment, it is different from the first embodiment of the first modification of the present invention. Only the different points will be described, and the same reference numerals will be given to the drawings and the like for the same parts, and the description thereof will be omitted. The operation (action) of the drainage device 1 according to the first modification of the embodiment of the present invention is the same as the operation (action) of the drainage device 1 according to the embodiment, and thus the description thereof will be omitted.

The vibrating member 131 constitutes a part of the inner wall forming the drainage flow path 22 inside the water sealing forming portion 10 in the state of being arranged in the communication hole 10a. The vibrating member 131 includes a flat surface portion 134 which is a diaphragm forming a part of an inner wall forming a drainage flow path 22 inside the communication hole 10a in a state of being arranged in the communication hole 10a, and a first curved portion 36. , A mounting surface portion 38 is provided.

The flat surface portion 134 in the first modification of the first embodiment is provided at a position different from that of the flat surface portion 34 according to the one embodiment at the bottom of the flow path of the water sealing forming portion 10. The flat surface portion 134 forms a bottom surface at a position shifted to the ascending flow path 16 side from directly below the descending flow path 14. The outer shape of the flat surface portion 134 is not limited to substantially the same size as the outer shape of the inner wall surface 32 near the sealing water level W0 in a plan view, and may be formed smaller than the outer shape of the inner wall surface 32, or the inner wall surface. It may be formed larger than the outer shape of 32.

Next, with reference to FIGS. 6 and 10, the relationship between the flat surface portion 134 and the inner wall surface 32 of the sealing water forming portion 10 near the sealing water level W0 will be described.
As shown in FIG. 10, the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 forms a protruding portion 40 projecting toward the center of the descending flow path 14. The entire circumference of the inner wall surface 32 near the sealing water level W0 of the sealing water forming portion 10 projects toward the center side of the flow path in the sealing water forming portion 10. In the plane view, the center position C1 of the plane portion 134 is different from the center position C2 of the descending flow path 14 at the sealing water level W0 of the sealing water forming portion 10. The center position C1 of the flat surface portion 134 is the center position of the circular flat surface portion 134. The flat surface portion 134 is not limited to a circular shape, and may have other shapes. Further, the center position of the flat surface portion 134 may be defined by another method. In a plan view, the central position C1 is arranged at a position deviated from the central position C2 to the downstream side (top 17 side of FIG. 6) of the water sealing forming portion 10. The flat surface portion 134 is arranged so as not to overlap the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 in a plan view.

As shown in FIG. 10, a first virtual line D1 (indicated by a dotted line) and a first virtual line connecting the center position C1 of the flat surface portion 134 and the center position C2 of the descending flow path 14 at the sealing water level W0 in a plan view. A second virtual line D2 orthogonal to D1 is virtually defined. The second virtual line D2 passes through the central position C2 of the descending flow path 14 at the sealed water level W0. In a plan view, of the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10, the side opposite to the side where the center position C1 of the plane portion 134 is located with respect to the second virtual line D2. At least a part of the inner wall surface 32 in the above forms a projecting portion 40, and projects toward the center side of the descending flow path 14. The region E on the side opposite to the side where the center position C1 of the plane portion 134 is located with respect to the second virtual line D2 is shown in FIG. In a plan view, a portion of the inner wall surface 32 near the sealing water level W0 that does not overlap the flat surface portion 134 (the portion indicated by the region A1) forms a protruding portion 40. Region A1 is formed over the entire circumference.

In FIG. 6, the shape of the inner wall surface 32 when the protrusion 40 is not formed is shown by the virtual line B for the purpose of comparison with the technique of the present application. The distance L1 (see FIG. 6) between the protruding portion 40 of the region A1 and the flat surface portion 134 (for example, the end of the flat surface portion 34) is the inner wall surface 32 (see FIG. 6) indicated by the virtual line B and the flat surface portion 134. It is shorter than the distance L2 (see FIG. 6) with (for example, the end of the flat surface portion 34). In this way, since the protruding portion 40 protrudes from the inner wall surface 32, the distance between the inclined surface 42 and the flat surface portion 134 is such that the protruding portion 40 is not formed on the inner wall surface 32 (the inner wall surface 32 is a virtual line). It is shorter than (when it becomes B). Even if the difference between the distance L1 and the distance L2 is relatively small, the attenuation of the sound pressure of the ultrasonic waves reaching the inner wall surface 32 is suppressed, and the detergency by the ultrasonic waves in the vicinity of the protruding portion 40 is improved.

Similarly, the distance L3 (see FIG. 6) between the protruding portion 40 of the region A1 and the center position C1 of the flat surface portion 134 is the inner wall surface 32 (see FIG. 6) indicated by the virtual line B and the center of the flat surface portion 134. It is shorter than the distance L4 (see FIG. 6) from the position C1. Even if the difference between the distance L3 and the distance L4 is relatively small, the attenuation of the ultrasonic waves with a relatively strong sound pressure reaching the inner wall surface 32 from the center position C1 of the flat surface portion 34 that irradiates the ultrasonic waves with a relatively strong sound pressure. It is suppressed and the detergency by ultrasonic waves in the vicinity of the protruding portion 40 is improved. Even if the distance between a part of the protruding portion 40 and the center position C1 of the flat surface portion 134 is longer than the distance between the inner wall surface 32 indicated by the virtual line B and the center position C1 of the flat surface portion 134. As a whole, the protrusion 40 suppresses the attenuation of the ultrasonic waves having a relatively strong sound pressure reaching the inner wall surface 32 from the center position C1 of the flat surface portion 134 that irradiates the ultrasonic waves with a relatively strong sound pressure, and is in the vicinity of the protruding portion 40. The detergency by ultrasonic waves is improved.

Next, a second modification of the vibrating member 31 of the drainage device 1 according to the embodiment of the present invention will be described with reference to FIGS. 6 and 11.
FIG. 11 shows a second modification of the flat surface portion of the water sealing forming portion of the drainage device according to the embodiment of the present invention, in which the descending flow path of the water sealing forming portion is viewed from above in a plan view. It is a schematic block diagram which shows the positional relationship between the inner wall surface near a water level W0 and a flat surface part. In FIG. 11, in order to clearly show the positional relationship between the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 and the flat surface portion 234, the sealing water forming portion 10 other than these portions is shown. The structure of is omitted from the illustration. As will be described later, the structure of the water seal forming portion 10 other than the position of the flat surface portion 234 is the same as that of the water seal forming portion 10 of the drainage device 1 according to the embodiment, and thus will be described with reference to FIG.

The flat surface portion 34 of the vibrating member 31 of the drainage device 1 according to one embodiment is arranged so as to partially overlap the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 in a plan view. In the second modification, the flat surface portion 234 of the vibrating member 231 is arranged at a position inside the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 in a plan view.

Since the drainage device 1 according to the second modification of the embodiment is similar in basic structure to the drainage device 1 according to the above-described embodiment, it is different from the second modification of the embodiment of the present invention. Only the different points will be described, and the same reference numerals will be given to the drawings and the like for the same parts, and the description thereof will be omitted. The operation (action) of the drainage device 1 according to the second modification of the embodiment of the present invention is the same as the operation (action) of the drainage device 1 according to the embodiment, and thus the description thereof will be omitted.

The vibrating member 231 constitutes a part of the inner wall forming the drainage flow path 22 inside the water sealing forming portion 10 in a state of being arranged in the communication hole 10a formed on the bottom surface of the water sealing forming portion 10. The vibrating member 231 includes a flat surface portion 234 and a first curved portion 36, which are diaphragms forming a part of an inner wall forming a drainage flow path 22 inside the communication hole 10a in a state of being arranged in the communication hole 10a. , A mounting surface portion 38 is provided.

The flat surface portion 234 is formed in a circular flat plate shape. The flat surface portion 234 is provided at the bottom of the flow path of the water sealing forming portion 10 and forms the bottom surface directly below the descending flow path 14. The outer shape of the flat surface portion 234 is smaller than the outer shape of the inner wall surface 32 near the sealing water level W0 in a plan view, and the flat surface portion 234 is included in the inner region of the inner wall surface 32. The size of the flat surface portion 234 can be changed, and a part of the flat surface portion 234 may be formed so as to overlap a part of the inner wall surface 32.

Next, with reference to FIGS. 6 and 11, the relationship between the flat surface portion 234 and the inner wall surface 32 of the sealing water forming portion 10 near the sealing water level W0 will be described.
As shown in FIG. 11, the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 forms a protruding portion 40 projecting toward the center of the descending flow path 14. The entire circumference of the inner wall surface 32 near the sealing water level W0 of the sealing water forming portion 10 projects toward the center side of the flow path in the sealing water forming portion 10. In the plane view, the center position C1 of the plane portion 234 is different from the center position C2 of the descending flow path 14 at the sealing water level W0 of the sealing water forming portion 10. The center position C1 of the flat surface portion 234 is the center position of the circular flat surface portion 234. The flat surface portion 234 is not limited to a circular shape, and may have other shapes. Further, the center position of the flat surface portion 234 may be defined by another method. In a plan view, the central position C1 is arranged at a position slightly deviated from the central position C2 to the downstream side (top 17 side of FIG. 6) of the water sealing forming portion 10. The flat surface portion 234 is arranged so as to overlap the inner region of the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 in a plan view.

As shown in FIG. 11, a first virtual line D1 (indicated by a dotted line) and a first virtual line connecting the center position C1 of the flat surface portion 234 and the center position C2 of the descending flow path 14 at the sealing water level W0 in a plan view. A second virtual line D2 orthogonal to D1 is virtually defined. The second virtual line D2 passes through the central position C2 of the descending flow path 14 at the sealed water level W0. In a plan view, of the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10, the side opposite to the side where the center position C1 of the plane portion 234 is located with respect to the second virtual line D2. At least a part of the inner wall surface 32 in the above forms a projecting portion 40, and projects toward the center side of the descending flow path 14. The region E on the side opposite to the side where the center position C1 of the plane portion 234 is located with respect to the second virtual line D2 is shown in FIG. In a plan view, a portion of the inner wall surface 32 near the sealing water level W0 that does not overlap with the flat surface portion 34 (the portion indicated by the region A1) forms a protruding portion 40.

In FIG. 6, the shape of the inner wall surface 32 when the protrusion 40 is not formed is shown by the virtual line B for the purpose of comparison with the technique of the present application. The distance L1 (see FIG. 6) between the protruding portion 40 of the region A1 and the flat surface portion 234 (for example, the end of the flat surface portion 34) is the inner wall surface 32 indicated by the virtual line B and the flat surface portion 234 (for example, the flat surface portion 34). It is shorter than the distance L2 (see FIG. 6). In this way, since the protruding portion 40 protrudes from the inner wall surface 32, the distance between the inclined surface 42 and the flat surface portion 234 is such that the protruding portion 40 is not formed on the inner wall surface 32 (the inner wall surface 32 is a virtual line). It is shorter than (when it becomes B). Even if the difference between the distance L1 and the distance L2 is relatively small, the attenuation of the sound pressure of the ultrasonic waves reaching the inner wall surface 32 is suppressed, and the detergency by the ultrasonic waves in the vicinity of the protruding portion 40 is improved.

The distance L3 (see FIG. 6) between the protruding portion 40 of the region A1 and the center position C1 of the plane portion 234 is the inner wall surface 32 (see FIG. 6) indicated by the virtual line B and the center position C1 of the plane portion 234. It is shorter than the distance L4 (see FIG. 6). Even if the difference between the distance L3 and the distance L4 is relatively small, the attenuation of the ultrasonic waves with a relatively strong sound pressure reaching the inner wall surface 32 from the center position C1 of the flat surface portion 234 that irradiates the ultrasonic waves with a relatively strong sound pressure It is suppressed and the detergency by ultrasonic waves in the vicinity of the protruding portion 40 is improved.

Next, with reference to FIG. 12, a third modification of the vibrating member 31 of the drainage device 1 according to the embodiment of the present invention will be described.
FIG. 12 shows a third modification of the flat surface portion of the water sealing forming portion of the drainage device according to the embodiment of the present invention, in which the descending flow path of the water sealing forming portion is viewed from above in a plan view. It is a schematic block diagram which shows the positional relationship between the inner wall surface near a water level W0 and a flat surface part. In FIG. 12, in order to clearly show the positional relationship between the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 and the flat surface portion 334, the sealing water forming portion 10 other than these portions is shown. The structure of is omitted from the illustration. As will be described later, the structure of the water seal forming portion 10 other than the position of the flat surface portion 334 is the same as that of the water seal forming portion 10 of the drainage device 1 according to the embodiment, and thus will be described with reference to FIG.

The center position of the flat surface portion 34 of the vibrating member 31 of the drainage device 1 according to one embodiment is different from the center position C2 of the descending flow path 14 in a plan view, whereas in the third modification, the flat surface of the vibrating member 131. The center position of the portion 334 is substantially the same as the center position C2 of the descending flow path 14 in a plan view.

Since the drainage device 1 according to the third modification of the embodiment has a similar basic structure to the drainage device 1 according to the above-described embodiment, it is different from the third modification of the embodiment of the present invention. Only the different points will be described, and the same reference numerals will be given to the drawings and the like for the same parts, and the description thereof will be omitted. The operation (action) of the drainage device 1 according to the third modification of the embodiment of the present invention is the same as the operation (action) of the drainage device 1 according to the embodiment, and thus the description thereof will be omitted.

The vibrating member 331 constitutes a part of the inner wall forming the drainage flow path 22 inside the water sealing forming portion 10 in a state of being arranged in the communication hole 10a formed on the bottom surface of the water sealing forming portion 10. The vibrating member 331 includes a flat surface portion 334 which is a diaphragm forming a part of an inner wall forming a drainage flow path 22 inside the communication hole 10a in a state of being arranged in the communication hole 10a, and a first curved portion 36. , A mounting surface portion 38 is provided.

The flat surface portion 334 in the third modification of the first embodiment is provided at a position different from that of the flat surface portion 34 according to the one embodiment at the bottom of the flow path of the water sealing forming portion 10. The flat surface portion 334 forms a bottom surface at a position directly below the descending flow path 14. The outer shape of the flat surface portion 334 is not limited to a size smaller than the outer shape of the inner wall surface 32 near the sealing water level W0 in a plan view, and may be formed to be substantially the same size as the outer shape of the inner wall surface 32. It may be formed larger than the outer shape of the inner wall surface 32.

Next, with reference to FIGS. 6 and 12, the relationship between the flat surface portion 334 and the inner wall surface 32 of the sealing water forming portion 10 near the sealing water level W0 will be described.
As shown in FIG. 12, the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 forms a protruding portion 40 projecting toward the center of the descending flow path 14. The entire circumference of the inner wall surface 32 near the sealing water level W0 of the sealing water forming portion 10 projects toward the center side of the flow path in the sealing water forming portion 10. The flat surface portion 334 is provided at the center position C1 of the flat surface portion 334 in the plan view at the same position as the center position C2 of the descending flow path 14 at the sealing water level W0 of the sealing water forming portion 10. The center position C1 of the flat surface portion 334 is the center position of the circular flat surface portion 334. The flat surface portion 334 is not limited to a circular shape, and may have other shapes. Further, the center position of the flat surface portion 334 may be defined by another method. The flat surface portion 334 is arranged so as not to overlap the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10 in a plan view. The size of the flat surface portion 334 can be changed, and a part of the flat surface portion 334 may be formed so as to overlap a part of the inner wall surface 32. Although the flat surface portion 334 is formed smaller than the descending flow path 14 in a plan view, the flat surface portion 334 may be formed to be substantially the same as or larger than the descending flow path 14.

In a plan view, of the inner wall surface 32 near the sealing water level W0 in the descending flow path 14 of the sealing water forming portion 10, the portion that does not overlap with the flat surface portion 334 forms a protruding portion 40 and is on the center side of the descending flow path 14. It protrudes toward. In a plan view, the region of the protrusion 40 formed in a portion that does not overlap with the plane portion 34 is indicated by A1, and the region A1 is formed over the entire circumference. Therefore, the entire circumference or most (for example, a portion of more than 50% of the entire circumference) of the inner wall surface 32 near the sealing water level W0 of the sealing water forming portion 10 is the center of the descending flow path 14 in the sealing water forming portion 10. It protrudes toward the side.

In FIG. 6, the shape of the inner wall surface 32 when the protrusion 40 is not formed is shown by the virtual line B for the purpose of comparison with the technique of the present application. The distance L1 (see FIG. 6) between the protruding portion 40 of the region A1 and the flat surface portion 334 (for example, the end of the flat surface portion 334) is the inner wall surface 32 (see FIG. 6) indicated by the virtual line B and the flat surface portion 334. It is shorter than the distance L2 (see FIG. 6) with (for example, the end of the flat surface portion 34). In this way, since the protruding portion 40 protrudes from the inner wall surface 32, the distance between the inclined surface 42 and the flat surface portion 334 is such that the protruding portion 40 is not formed on the inner wall surface 32 (the inner wall surface 32 is a virtual line). It is shorter than (when it becomes B). Even if the difference between the distance L1 and the distance L2 is relatively small, the attenuation of the sound pressure of the ultrasonic waves reaching the inner wall surface 32 is suppressed, and the detergency by the ultrasonic waves in the vicinity of the protruding portion 40 is improved.

Similarly, the distance L3 (see FIG. 6) between the protruding portion 40 of the region A1 and the center position C1 of the flat surface portion 334 is the center of the inner wall surface 32 (see FIG. 6) and the flat surface portion 334 indicated by the virtual line B. It is shorter than the distance L4 (see FIG. 6) from the position C1. Even if the difference between the distance L3 and the distance L4 is relatively small, the attenuation of the ultrasonic wave with a relatively strong sound pressure reaching the inner wall surface 32 from the center position C1 of the flat surface portion 334 that irradiates the ultrasonic wave with a relatively strong sound pressure It is suppressed and the detergency by ultrasonic waves in the vicinity of the protruding portion 40 is improved.

Next, the effect of the configuration of the present embodiment will be described.
According to one embodiment of the present invention configured in this way, the sealing water forming portion 10 includes a metal inner wall surface at least at the sealing water level W0. As a result, ultrasonic waves can be easily reflected by the inner wall surface of the metal near the sealing water level W0 where dirt is likely to adhere. Therefore, it is possible to improve the cleaning performance in the vicinity of the sealing water level W0 where dirt easily adheres.

According to one embodiment of the present invention configured in this way, the inner wall surface 32 of the water sealing forming portion 10 of the drainage device 1 is generally formed of resin. If the inner surface of the metal is formed on the water sealing forming portion 10, if a part of the inner wall of the water sealing forming portion 10 is to be partially changed to the metal inner wall, the metal inner wall and the water sealing forming portion 10 A connection part is required between the inner wall and the inner wall of another resin, and there is a risk of water leakage from the connection part. If such a connection portion is adopted, there is a problem that the work process is troublesome and the number of parts of the drainage device is increased in order to ensure the watertightness of the connection portion.
On the other hand, the inventor of the present invention has studied to cover the entire inner wall of the water-sealing forming portion 10 with a metal layer so that not all of the water-sealing forming portion 10 is made of a metal member. However, there is a problem that it is relatively difficult to cover the entire inner wall of the water sealing forming portion 10 with the metal layer in this way.
On the other hand, according to the configuration of one embodiment of the present invention, the inner side surface of the metal of the water sealing forming portion 10 is formed by providing the metal member 52 inside the inner wall of the water sealing forming portion 10. .. As a result, the inner side surface of the metal is relatively easily attached to the inside of the inner wall of the water sealing forming portion 10. Therefore, in order to form the inner side surface of the metal of the water sealing forming portion 10, it is not necessary to provide a connecting portion between the inner wall of the metal and the inner wall of the other resin of the sealing water forming portion 10. Therefore, when forming the inner surface of the metal of the water sealing forming portion 10, the risk of water leakage can be suppressed, the decrease in manufacturability can be suppressed, and the increase in production cost can be suppressed.

According to one embodiment of the present invention configured in this way, the upper end of the inner side surface of the metal of the water seal forming portion 10 is formed at a position higher than the ultrasonic cleaning water level W2, so that the water seal forming portion 10 is formed. When the water level in 10 rises to the ultrasonic cleaning water level, the inner wall surface 32 of the metal can easily reflect the ultrasonic waves at the ultrasonic cleaning water level where dirt easily adheres, and the ultrasonic waves reflected on the water surface can be reflected in the metal. It can be further reflected by the side surface, and the cleaning performance near the ultrasonic cleaning water level can be improved.

1 Drainage device 4 Sink 4a Bottom 10 Water seal forming part 19 Water level adjusting part 26 Ultrasonic oscillator 30 Wall 31 Vibrating member 32 Inner wall surface 34 Flat part 40 Protruding part 42 Inclined surface 131 Vibrating member 134 Flat part 231 Vibration member 234 Flat part 331 Vibration member 334 Flat surface C1 Center position C2 Center position W0 Sealed water level W1 Ultrasonic cleaning water level

Claims (3)

It is a drainage device installed below the water receiving part.
A water seal forming portion provided downstream of the water receiving portion, a flow path is formed inside, and a water seal is formed in the flow path.
An ultrasonic oscillator that irradiates the water in the water seal forming part with ultrasonic waves,
It is provided with a water level adjusting portion formed so that the water level in the sealing water forming portion is raised from the sealing water level to the ultrasonic cleaning water level higher than the sealing water level by the water flowing into the sealing water forming portion.
The water-sealing forming portion is a drainage device including an inner surface of a metal at least at the water-sealing water level. The drainage device according to claim 1, wherein the inner surface of the metal of the water seal forming portion is formed by providing a metal member inside the inner wall of the water seal forming portion. The drainage device according to claim 1 or 2, wherein the upper end of the inner surface of the metal of the water sealing forming portion is formed at a position higher than the ultrasonic cleaning water level.

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