JP7271929B2 - bathtub cleaning equipment - Google Patents

Description

Aspects of the present invention relate generally to bathtub cleaning devices.

A bathtub cleaning device that automatically cleans a bathtub is known (Patent Document 1). Such a bathtub washing apparatus can automatically wash the inner wall surface of the bathtub by spraying detergent, water (hot water), or the like on the inner wall surface of the bathtub.

JP-A-10-66659

2. Description of the Related Art Conventionally, there has been known a bathtub cleaning apparatus in which detergent water diluted with water is jetted from a nozzle toward an inner wall surface of a bathtub, etc., and the jetted detergent water is recovered and jetted into the bathtub again. For example, the bathtub cleaning apparatus of Patent Document 1 is configured to wash the inside of the bathtub by circulating detergent water generated in the bathtub and repeatedly ejecting the detergent water from nozzles. As a result, the amount of detergent water consumed can be suppressed while enabling the inside of the bathtub to be washed.

Here, in the configuration (recovery type) in which the detergent water ejected from the nozzle into the bathtub is recovered and the recovered detergent water is ejected from the nozzle again into the bathtub, the detergent water once used for washing is used. is recovered, dirt such as dirt and dust may enter the recovery channel during recovery. If dirt enters the recovery channel, the function of the pump may be deteriorated or the recovery channel may be clogged, resulting in a decrease in the recovery rate of the detergent water and, as a result, a decrease in detergency.

In Patent Document 1, since a filter for filtering scale and dust is provided on the suction side of the pump for circulating the detergent water, the pump is prevented from sucking scale and dust, etc., even though the structure is of a recovery type. can also However, even if a filter is provided as in Patent Document 1, there is a problem that contaminants accumulate on the filter, clogging the recovery channel.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bathtub cleaning apparatus capable of suppressing deposition of dirt on a filter and blocking of a recovery channel.

A first invention comprises a detergent tank for storing detergent, a detergent mixing part for mixing detergent supplied from the detergent tank and water supplied from a water supply source to generate detergent water, and a bathtub for mixing the detergent water. a cleaning nozzle that jets toward the inner wall surface of the bath, a cleaning channel that connects the detergent mixing section and the cleaning nozzle, and a drainage port and a recovery port that are provided in the drainage section of the bathtub and open at the drainage section. a recovery channel for returning the detergent water recovered from the recovery port to between the detergent tank and the washing nozzle; The bathtub cleaning apparatus is characterized in that the drain port and the recovery port are provided at positions lower than the inner bottom surface of the bathtub.

According to this bathtub cleaning apparatus, the drain member has a drain port and a recovery port that open (that is, are provided at positions close to each other) in the drain portion of the bathtub, and the drain port and the recovery port extend from the inner bottom surface of the bathtub. is also provided at a low position, and a filter is provided at the collection port. By providing the drain port, the collection port, and the filter at such positions, the water flowing from the bathtub to the drain port when the water stored in the bathtub is discharged or when the detergent water is in the rinse mode. At least a portion of the flow passes over the filter. As a result, dirt on the upper surface of the filter can be guided to the drain port and discharged to the outside by the flow of water from the bathtub to the drain port. That is, the waste water from the bathtub is used to remove the dirt on the filter, and it is possible to suppress the clogging of the collection channel due to the accumulation of dirt on the filter.

According to a second invention, in the first invention, the drainage member has a partition wall positioned between the drainage port and the recovery port, and the filter is provided on the partition wall. It is characterized by a bathtub cleaning device.

According to this bathtub cleaning device, by providing the filter on the partition wall of the drainage member, the upper surface of the filter can be provided at a position higher than the drain port. As a result, when the water stored in the bathtub is drained or when the rinse mode is used to flush out the detergent water, the flow of water from the bathtub to the drain outlet more reliably cleans the dirt on the top surface of the filter to the drain outlet. can be led to and discharged to the outside.

A third invention is the bathtub cleaning device according to the second invention, wherein the upper surface of the filter is inclined downward toward the drain port.

According to this bathtub cleaning device, by providing the upper surface of the filter so as to be inclined downward toward the drain port, dirt on the upper surface of the filter can be more reliably guided to the drain port and discharged to the outside.

A fourth invention is the bathtub cleaning device according to any one of the first to third inventions, wherein the recovery port is provided so as to surround the drain port.

According to this bathtub cleaning device, by providing the recovery port so as to surround the drain port, compared to the case where the drain port and the recovery port are provided side by side, the flow of water from the bathtub to the drain port is wasted. can lead to the entire filter. Therefore, the dirt on the upper surface of the filter can be more reliably led to the drain port and discharged to the outside.

A fifth invention is the bathtub cleaning device according to any one of the first to fourth inventions, wherein the filter is detachably attached to the drainage member.

According to this bathtub cleaning device, the filter is detachably attached to the drainage member, so that maintenance can be easily performed even if dirt accumulates on the filter.

ADVANTAGE OF THE INVENTION According to the aspect of this invention, the bathtub cleaning apparatus which can suppress the accumulation of dirt on a filter, and can suppress blockage|occlusion of a collection|recovery flow path is provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which represents typically the bathtub cleaning apparatus which concerns on embodiment. 2(a) and 2(b) are a perspective view and a cross-sectional view schematically showing a drainage member of the bathtub cleaning device according to the embodiment. FIG. 4 is a side view schematically showing part of the drainage member of the bathtub cleaning device according to the embodiment; FIG. 3 is a perspective view schematically showing part of a drainage member of the bathtub cleaning device according to the embodiment; 5(a) and 5(b) are a perspective view and a cross-sectional view schematically showing the vicinity of a filter of the bathtub cleaning device according to the embodiment. 6(a) and 6(b) are a perspective view and a side view schematically showing a filter of a bathtub cleaning device according to a modified example of the embodiment. It is a flow chart showing the operation of the bathtub cleaning device according to the embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each drawing, the same reference numerals are given to the same constituent elements, and detailed description thereof will be omitted as appropriate.

FIG. 1 is an explanatory diagram schematically showing a bathtub cleaning device according to an embodiment.
As shown in FIG. 1 , the bathtub cleaning device 200 includes a detergent tank 10 , a detergent mixing section 20 , a cleaning nozzle 30 , a control section 40 and a drainage member 50 . Bathtub cleaning device 200 is installed in bathtub 100 .

The detergent tank 10 is connected to a detergent input port 135 provided on the upper surface of the rim of the bathtub 100 and stores detergent input from the detergent input port 135 . The detergent tank 10 is provided with a water level detector 11 such as a float switch.

The detergent mixing section 20 is provided downstream of the detergent tank 10 and the water supply source WS. The detergent mixing unit 20 mixes the detergent supplied from the detergent tank 10 and the water supplied from the water supply source WS to generate detergent water. In the specification of the present application, "water" includes not only cold water but also heated hot water. That is, the water supply source WS may have a water heater.

The detergent mixing unit 20 is, for example, a tank that stores detergent water. The detergent mixing unit 20 stores the detergent water when jetting the detergent water from the washing nozzle 30 , and stores the water when jetting the water from the washing nozzle 30 . The detergent mixing section 20 is provided with a water level detection section 21 such as a float switch. Note that the detergent mixing unit 20 may be a venturi tube or the like.

A detergent channel 15 is provided between the detergent tank 10 and the detergent mixing section 20 . The detergent channel 15 connects the detergent tank 10 and the detergent mixing section 20 . The detergent channel 15 is provided with an on-off valve 16 , a flow rate adjusting section 17 , a pump 18 and a backflow preventing section 19 .

The on-off valve 16 is, for example, an electromagnetic valve. The on-off valve 16 controls the supply of detergent to the detergent mixing section 20 . By opening the on-off valve 16 , the detergent stored in the detergent tank 10 is supplied to the detergent mixing section 20 . By closing the on-off valve 16, the supply of detergent from the detergent tank 10 to the detergent mixing section 20 is stopped.

The flow rate adjusting section 17 is provided downstream of the on-off valve 16 . The flow rate adjuster 17 is, for example, an orifice. The flow rate adjusting section 17 adjusts the flow rate of the detergent flowing through the detergent channel 15 . The flow rate adjusting unit 17 is provided as necessary and can be omitted. The “downstream” of the detergent channel 15 is the downstream side (that is, the detergent mixing section 20 side) when the liquid flows from the detergent tank 10 toward the detergent mixing section 20 .

The pump 18 is provided downstream of the on-off valve 16 and the flow rate adjusting section 17 . The pump 18 sends the detergent in the detergent channel 15 to the detergent mixing section 20 .

The backflow prevention section 19 is provided between the on-off valve 16 and the flow rate adjustment section 17 . The backflow prevention part 19 suppresses backflow of liquid from the pump 18 side to the on-off valve 16 side. The backflow prevention part 19 is, for example, a check valve.

A water supply channel 25 is provided between the water supply source WS and the detergent mixing section 20 . The water supply channel 25 connects the water supply source WS and the detergent mixing section 20 . The water supply channel 25 is provided with an on-off valve 26 and a flow rate adjusting section 27 .

The on-off valve 26 is, for example, an electromagnetic valve. The on-off valve 26 controls the supply of water to the detergent mixing section 20 . Water from the water supply source WS is supplied to the detergent mixing section 20 by opening the on-off valve 26 . By closing the on-off valve 26, the supply of water from the water supply source WS to the detergent mixing section 20 is stopped.

The flow rate adjusting section 27 is provided downstream of the on-off valve 26 . The flow rate adjusting section 27 is, for example, a constant flow valve. The flow rate adjuster 27 adjusts the flow rate of water flowing through the water supply channel 25 . Note that the “downstream” of the water supply channel 25 is the downstream side (that is, the detergent mixing section 20 side) when the liquid flows from the water supply source WS toward the detergent mixing section 20 .

Washing nozzle 30 is provided on inner wall surface 110 of bathtub 100 . More specifically, the cleaning nozzle 30 is provided on an inner bottom surface 111 located at the bottom of the inner wall surface 110 of the bathtub 100 or an inner wall surface 112 located above the inner bottom surface 111 . Wash nozzle 30 jets liquid (detergent water or water) toward inner wall surface 110 (inner wall surface 112 ) of bathtub 100 . The cleaning nozzle 30 is rotatable about the vertical direction (that is, in the horizontal direction) by a motor 32 .

A washing channel 35 is provided between the detergent mixing section 20 and the washing nozzle 30 . The cleaning flow path 35 connects the detergent mixing section 20 and the cleaning nozzle 30 . The cleaning flow path 35 is provided with an ejection control section 36 and a backflow prevention section 37 .

The ejection control unit 36 controls ejection of liquid from the cleaning nozzle 30 . The ejection control section 36 is provided downstream of the detergent mixing section 20 . The ejection control unit 36 is, for example, a pump. The ejection control unit 36 may be an on-off valve such as an electromagnetic valve. In this case, a pumping means for pumping the liquid to the washing nozzle 30 is provided, such as by using a venturi tube as the detergent mixing section 20 or, if the detergent mixing section 20 is a tank, elevating the position of the tank to increase the head pressure. In addition, the “downstream” of the cleaning flow path 35 is the downstream side (that is, the cleaning nozzle 30 side) when the liquid flows from the detergent mixing section 20 toward the cleaning nozzle 30 .

The backflow prevention section 37 is provided downstream of the ejection control section 36 . The backflow prevention part 37 suppresses backflow of detergent water, water, waste water, etc. from the washing nozzle 30 to the detergent mixing part 20 . The backflow prevention part 37 is, for example, a check valve. The backflow prevention part 37 may be an on-off valve such as an electromagnetic valve. A plurality of backflow prevention portions 37 may be provided.

The inner bottom surface 111 of the bathtub 100 is provided with a drainage part 115 for discharging the liquid in the bathtub 100 . The drainage part 115 is a cylindrical part that extends downward from the inner bottom surface 111 and penetrates in the vertical direction. The inner bottom surface 111 of the bathtub 100 slopes downward toward the drain 115 . By providing such a downward inclination, the liquid in the bathtub 100 can be guided to the drainage section 115 along the inner bottom surface 111 .

The drainage member 50 is provided in the drainage portion 115 of the bathtub 100 . The drainage member 50 has a drainage port 51 and a collection port 52 . The drain port 51 and the recovery port 52 open at the drain portion 115 . That is, the drain port 51 and the recovery port 52 are provided at positions close to each other. By providing the drain port 51 and the recovery port 52 at positions close to each other, it is possible to achieve both drainage performance and recovery performance.

The drain port 51 and the recovery port 52 divide the liquid flowing into the drain part 115 into a drain side and a recovery side. That is, of the liquid that has flowed into the drain portion 115 , the liquid that has flowed to the drain port 51 is discharged to the outside of the bathtub cleaning device 200 . On the other hand, the liquid that has flowed into the recovery port 52 out of the liquid that has flowed into the drainage portion 115 is returned (collected) from the recovery port 52 into the bathtub cleaning device 200 . The drainage member 50 will be described later.

The bathtub cleaning device 200 has a recovery channel 55 for returning the liquid (detergent water) recovered from the recovery port 52 between the detergent tank 10 and the cleaning nozzle 30 . One end of the recovery channel 55 is connected to the drainage section 115 (the recovery port 52). The other end of recovery channel 55 is connected to detergent channel 15 , detergent mixing section 20 , or cleaning channel 35 . When the detergent mixing section 20 is a venturi tube, the other end of the recovery channel 55 is connected to the cleaning channel 35 . An on-off valve 56 is provided in the recovery channel 55 . The on-off valve 56 is, for example, an electromagnetic valve.

A filter 80 for filtering the collected detergent water is provided on the collection channel 55 . A filter 80 is provided at the recovery port 52 . In the specification of the present application, the term “filter” is provided to suppress clogging of the flow path and performance deterioration of the pump, and prevents dirt such as hair, scale, and dust from passing downstream. It is something to do. For this reason, the function of allowing liquids to pass through but not solids to pass through is realized. Specifically, it is sufficient to have a plurality of openings through which liquids can pass. However, if the opening is too large, it will allow solids of a given size to pass through, and if it is too small, it will be difficult for liquids to pass through and clogging will occur quickly. do it. Filter 80 will be described later.

A filter with a coarser mesh than the filter 80 may be provided on the upstream side of the filter 80 provided in the recovery port 52 . Further, a filter with a coarser mesh than the filter 80 may be provided on the drainage channel through which the liquid discharged from the drainage port 51 flows. Filters coarser than these filters 80 may be hair catchers. By making the filter provided on the drainage channel coarser than the filter 80 provided on the recovery port 52, the dirt adhering to the filter 80 can pass through the filter provided on the drainage channel and be discharged. .

The recovery channel 55 is provided with a recovery portion 57 that stores the detergent water recovered from the recovery port 52 . By providing such a recovery part 57, the detergent water can be circulated while maintaining the state in which the inside of the recovery channel 55 is filled with the liquid. As a result, it is possible to prevent the pump 18 from sucking air and generating bubbles when the detergent water is circulated.

In this example, the recovery part 57 is provided in the drainage member 50 . The recovery part 57 may be provided separately from the drainage member 50 . Further, when the detergent mixing section 20 is a tank, the detergent water collected from the collection port 52 may be stored in the detergent mixing section 20 without providing the collection section 57 .

The detergent water collected from the collection port 52 passes through the collection channel 55 and is returned to the detergent mixing section 20 by the pump 18 . Then, when a predetermined amount of the collected detergent water is accumulated in the detergent mixing portion 20 (that is, when a predetermined amount of detergent water is collected), the collected detergent water is ejected from the washing nozzle 30 again by the ejection control portion 36. be. The detergent water ejected from the washing nozzle 30 is recovered again through the recovery port 52 . By repeating this, it is possible to wash the bathtub while circulating the detergent water.

In this example, the detergent water is recovered by activating the pump 18 provided in the detergent flow path 15. However, by providing a pump in the recovery flow path 55 and activating the pump, the detergent water can be recovered. You can collect. Alternatively, the detergent water may be collected by operating a pump provided in the washing channel 35 . That is, in the embodiment, the recovery of detergent water is performed by a pump provided in any one of the detergent channel 15 , the cleaning channel 35 and the recovery channel 55 .

An opening/closing part 60 is provided in the drainage part 115 of the bathtub 100 . The opening/closing part 60 is a drain plug that opens and closes the drain part 115 of the bathtub 100 .

The control unit 40 is electrically connected to the on-off valve 16, the pump 18, the on-off valve 26, the ejection control unit 36, and the on-off valve 56, and controls the on-off valve 16, the pump 18, the on-off valve 26, the ejection control unit 36, and controls the on-off valve 56 . The controller 40 is electrically connected to the motor 32 and may control the motor 32 .

2(a) and 2(b) are a perspective view and a cross-sectional view schematically showing a drainage member of the bathtub cleaning device according to the embodiment.
As shown in FIGS. 2(a) and 2(b), the drain member 50 has a drain valve plate 510, a collection tank 520, and a drain connector 530. As shown in FIG.

The drain valve plate 510 has a plate portion 511 , a drain hole portion 512 , an upward extending portion 513 , a downward extending portion 514 and a connecting portion 515 . The plate portion 511 is a plate-like portion extending horizontally. The drain hole portion 512 is a hole penetrating the plate portion 511 in the vertical direction. The upward extending portion 513 is a portion that is provided so as to surround the drain hole portion 512 and extends upward from the upper surface of the plate portion 511 . The upwardly extending portion 513 is positioned outside the lower end of the drainage portion 115 of the bathtub 100 . In other words, the drain valve plate 510 is attached so that the lower end of the drain portion 115 of the bathtub 100 is positioned in the space surrounded by the upwardly extending portion 513 . The downward extending portion 514 is a portion that is provided so as to surround the drain hole portion 512 and extends downward from the lower surface of the plate portion 511 . The downward extending portion 514 is positioned below the lower end of the drainage portion 115 of the bathtub 100 . The connecting portion 515 is provided on the outer peripheral portion of the plate portion 511 and is a portion that connects the drain valve plate 510 to the lower portion of the waterproof pan provided below the bathtub 100 .

The recovery tank 520 has a drain pipe portion 521 , a tank portion 522 and a recovery connection portion 523 . The drain pipe portion 521 is a tubular portion that extends vertically and penetrates vertically. The tank part 522 is provided so as to surround the drain pipe part 521 and is a container-like part with an open top. The tank portion 522 functions as a recovery portion 57 that stores the detergent water recovered from the recovery port 52 . The collection connection portion 523 is a cylindrical portion that is provided on the lower surface of the tank portion 522 and vertically penetrates the tank portion 522 . The detergent water stored in the tank portion 522 is returned between the detergent tank 10 and the washing nozzle 30 via the collection connection portion 523 .

The drain connecting part 530 is a cylindrical member that extends vertically and penetrates vertically. The drain connection part 530 connects the drain part 115 of the bathtub 100 and the drain valve plate 510 . The drain connector 530 is provided inside the drain hole 512 of the drain valve plate 510 . The drainage connection part 530 is provided inside the lower end of the drainage part 115 of the bathtub 100 .

The drainage member 50 has a double pipe structure consisting of a drainage pipe portion 521 of the recovery tank 520 and a drainage connection portion 530 . The drain port 51 is a portion surrounded by the upper end of the drain pipe portion 521 . The recovery port 52 is a gap between the upper end of the drainage pipe portion 521 and the upper end of the drainage connection portion 530 . A gap between the upper end of the drain pipe portion 521 and the inner wall of the drain portion 115 of the bathtub 100 may be regarded as the recovery port 52 . The drain pipe portion 521 is positioned between the drain port 51 and the recovery port 52 . That is, the inner side of the upper end of the drain pipe portion 521 is the drain port 51 , and the outer side of the upper end of the drain pipe portion 521 is the recovery port 52 .

Thus, the recovery port 52 is provided so as to surround the drain port 51 . By providing the recovery port 52 so as to surround the drain port 51, compared to the case where the drain port 51 and the recovery port 52 are provided side by side, the flow of water flowing from the bathtub 100 to the drain port 51 is reduced without waste. It can lead all the way through the filter 80 . Therefore, dirt on the upper surface of the filter 80 can be guided more reliably to the drain port 51 and discharged to the outside.

In the embodiment, the recovery port 52 and the drain port 51 may be provided side by side (horizontally aligned). In other words, the drainage member 50 is not limited to having a double pipe structure. The drain member 50 may have at least a partition wall 53 positioned between the drain port 51 and the recovery port 52 . In the example shown in FIGS. 2A and 2B , the drain pipe portion 521 corresponds to the partition wall 53 positioned between the drain port 51 and the recovery port 52 . The drain member 50 may have a wall portion positioned between the drain port 51 and the recovery port 52 instead of the drain pipe portion 521 as the partition wall 53 . Further, the shape of the drainage port 51 and the recovery port 52 in a top view is not limited to circular, and may be polygonal.

FIG. 3 is a side view schematically showing part of the drainage member of the bathtub cleaning device according to the embodiment.
FIG. 3 is a side view of the drain valve plate 510. FIG.
As shown in FIG. 3 , the drain valve plate 510 has a notch 516 in the downwardly extending portion 514 . The upper end of the notch portion 516 is, for example, the same height as the lower surface of the plate portion 511 . The upper end of the notch portion 516 may be positioned below the lower surface of the plate portion 511 . In this example, the notch portions 516 are provided at two opposing locations on the tubular downwardly extending portion 514 . The number of notches 516 may be one, or three or more.

By providing such a cutout portion 516 , the air in the tank portion 522 of the collection tank 520 can escape to the outside of the tank portion 522 through the cutout portion 516 when the detergent water is collected from the collection port 52 . As a result, when the detergent water flows into the tank part 522, there is no place for the air in the tank part 522 to escape, and the detergent water cannot flow into the tank part 522, and it is possible to prevent the collection from being hindered. . Further, when the area of the notch portion 516 increases, it becomes easier to discharge the air inside the tank portion 522 to the outside.

FIG. 4 is a perspective view schematically showing part of the drainage member of the bathtub cleaning device according to the embodiment.
4 is a perspective view of the collection tank 520. FIG.
As shown in FIG. 4, the collection tank 520 may have a vent hole 524 provided in the tank portion 522 . A vent hole 524 is provided in the upper portion of the tank portion 522 . In this example, two air holes 524 are provided. The number of air holes 524 may be one, or three or more.

By providing such a vent hole 524 , the air in the tank portion 522 can be released to the outside of the tank portion 522 through the vent hole 524 when the detergent water is recovered from the recovery port 52 . As a result, when the detergent water flows into the tank part 522, there is no place for the air in the tank part 522 to escape, and the detergent water cannot flow into the tank part 522, and it is possible to prevent the collection from being hindered. .

5(a) and 5(b) are a perspective view and a cross-sectional view schematically showing the vicinity of a filter of the bathtub cleaning device according to the embodiment.
FIG. 5(a) shows a state in which the filter 80 is removed upward.
FIG. 5(b) shows a state in which the filter 80 is attached.
As shown in FIGS. 5(a) and 5(b), the filter 80 is provided at the recovery port 52. As shown in FIG. In this example, the filter 80 is provided above the recovery port 52 so as to cover the recovery port 52 .

The filter 80 has a filtering portion 81 and a frame portion 82 . The filtering part 81 is a mesh made of metal or resin. As used herein, the term "mesh" refers to a sieve capable of separating liquid from contaminants such as dirt and dust. The filtering part 81 may be a mesh in which metal wires are woven, an etching mesh made of resin, or a punching mesh made of metal. Moreover, the shape of the hole provided in the filtering part 81 may be a polygon including a rectangle and a square, or may be a circle.

The frame portion 82 supports the filtering portion 81 . The frame portion 82 is made of resin. If the filtering portion 81 is an etching mesh made of resin, the filtering portion 81 may be formed integrally with the frame portion 82 . The frame portion 82 is provided as required and can be omitted.

Filter 80 has an upper surface 80a. The upper surface 80 a is the upper surface of the filtering section 81 .

The detergent water jetted from the washing nozzle 30 and used for washing the bathtub 100 flows into the drainage portion 115 of the bathtub 100 , passes through the filter 80 (filtration portion 81 ), and flows into the recovery port 52 . At this time, dirt such as dirt and dust contained in the collected detergent water is filtered by the filtering portion 81 and adheres to the upper surface 80a (the upper surface of the filtering portion 81). By providing such a filter 80 , dirt such as dirt and dust contained in the collected detergent water can be prevented from entering the downstream of the collection channel 55 . On the other hand, when dirt accumulates on the filtering part 81, the collection flow path 55 is blocked, and the recovery rate of the detergent water may decrease, resulting in a decrease in detergency.

Therefore, in the bathtub cleaning apparatus 200 according to the embodiment, the drain port 51 and the recovery port 52 that open (that is, are provided at positions close to each other) in the drain portion 115 of the bathtub 100 are positioned lower than the inner bottom surface 111 of the bathtub 100. position, and a filter 80 is provided at the recovery port 52 . By providing the drain port 51, the recovery port 52, and the filter 80 at such positions, as shown in FIG. During the rinse mode, at least part of the water flowing from inside the bathtub 100 to the drain port 51 passes above the filter 80 . As a result, dirt on the upper surface 80a of the filter 80 can be guided to the drain port 51 and discharged to the outside by the flow of water from the inside of the bathtub 100 indicated by the arrow to the drain port. That is, the waste water from the bathtub 100 can be used to remove the dirt on the filter 80 , and the clogging of the collection channel 55 due to the accumulation of dirt on the filter 80 can be suppressed.

When the water stored in the bathtub 100 is drained or when the detergent water is in the rinsing mode, the on-off valve 56 provided in the recovery flow path 55 is closed. As a result, even if waste water flows into the recovery channel 55 from the recovery port 52 , the flow of the waste water to the downstream side of the on-off valve 56 can be suppressed.

In this example, the filter 80 is provided on the partition wall 53 positioned between the drain port 51 and the recovery port 52 . More specifically, the frame portion 82 of the filter 80 is provided on the partition wall 53 . By providing the filter 80 on the partition wall 53 of the drain member 50 in this manner, the upper surface 80 a of the filter 80 (the upper surface of the filtering section 81 ) can be provided at a position higher than the drain port 51 . As a result, dirt on the upper surface 80a of the filter 80 is removed by the flow of water from the bathtub 100 to the drain port 51 when the water stored in the bathtub 100 is drained or when the detergent water is in the rinsing mode. It can be guided to the drain port 51 more reliably and discharged to the outside.

In embodiments, the filter 80 may be provided at the recovery port 52 . That is, the filter 80 may be provided inside the recovery port 52 . Further, the filter 80 may be provided below the recovery port 52 as long as it is in the vicinity of the recovery port 52 . When the filter 80 is provided below the recovery port 52 , the filter 80 is provided at a position within 1 mm below the recovery port 52 .

The filter 80 is detachably attached to the drainage member 50 . By attaching the filter 80 detachably to the drainage member 50 in this way, maintenance can be easily performed even if dirt accumulates on the filter 80 .

6(a) and 6(b) are a perspective view and a side view schematically showing a filter of a bathtub cleaning device according to a modified example of the embodiment.
As shown in FIGS. 6(a) and 6(b), in this example, the filtering portion 81 of the filter 80 slopes downward from the outside toward the inside. With the filter 80 attached, the upper surface 80 a of the filter 80 is inclined downward toward the drain port 51 .

In this way, by providing the upper surface 80a (filter portion 81) of the filter 80 so as to be inclined downward toward the drain port 51, as shown in FIG. Water can flow along the upper surface 80a of the filter 80 as indicated by the arrows. This is because the amount of detergent water collected during main washing is small, so there is no water force and it falls into the collection port 52, whereas when a large amount of water is discharged during draining or rinsing, the water force increases. This is because the water to be discharged is likely to flow to the drain port 51 along the downward inclined surface because of its strength. Therefore, dirt on the upper surface 80a of the filter 80 can be guided more reliably to the drain port 51 and discharged to the outside.

FIG. 7 is a flow chart showing the operation of the bathtub cleaning device according to the embodiment.
As shown in FIG. 7, the controller 40 can execute a main cleaning mode, a rinsing mode, and a pre-cleaning mode. A pre-cleaning mode is performed as needed and can be omitted.

When the user executes a bathtub cleaning operation using a remote control or the like (step S101), the control unit 40 drains the water in the bathtub 100 from the drain unit 115 (step S102).

For example, the bathtub 100 is provided with a water level detector for detecting the water level inside the bathtub 100 . After a predetermined time has passed since the water level reached the lowest level detectable by the water level detection unit (or after the water level detection unit did not detect the water level), it can be considered that the water discharge has ended.

Next, the controller 40 executes the pre-cleaning mode (step S103). In the pre-washing mode, controller 40 jets detergent water or water from washing nozzle 30 toward inner wall surface 110 of bathtub 100 . During execution of the pre-cleaning mode, the controller 40 drains the liquid ejected from the cleaning nozzles 30 . When the detergent water is jetted in the pre-washing mode, the controller 40 may collect the detergent water during execution of the pre-washing mode.

Next, the controller 40 executes the main cleaning mode (step S104). In this washing mode, the controller 40 jets detergent water from the washing nozzle 30 toward the inner wall surface 110 of the bathtub 100 . During execution of this cleaning mode, the control unit 40 collects the detergent water.

Next, the controller 40 executes the rinse mode (step S105). In the rinsing mode, controller 40 jets water from washing nozzle 30 toward inner wall surface 110 of bathtub 100 . During execution of the rinsing mode, the controller 40 drains the liquid ejected from the cleaning nozzle 30 .

In this manner, by recovering the detergent water during execution of the main washing mode, it is possible to improve the detergency without increasing the amount of detergent used.

The filter 80 is washed by the flow of water from inside the bathtub 100 to the drain port during draining in steps S102 and S105. Further, when the liquid ejected from the washing nozzle 30 is drained in step S103, the filter 80 is washed by the flow of liquid flowing from the bathtub 100 to the drain port during the draining in step S103. By washing the filter 80 with the waste water in the flow of washing the bathtub in this way, it is possible to suppress the adhesion of dirt to the filter 80 and the accumulation of dirt on the filter 80 . Moreover, water consumption can be reduced as compared with the case where a separate mode for cleaning the filter 80 is provided.

The embodiments of the present invention have been described above. However, the invention is not limited to these descriptions. Appropriate design changes made by those skilled in the art with respect to the above embodiments are also included in the scope of the present invention as long as they have the features of the present invention. For example, the shape, size, material, arrangement, and the like of each element included in the bathtub cleaning device are not limited to those illustrated and can be changed as appropriate.
Moreover, each element provided in each of the above-described embodiments can be combined as long as it is technically possible, and a combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

10 Detergent Tank 11 Water Level Detector 15 Detergent Channel 16 On-Off Valve 17 Flow Control Part 18 Pump 19 Backflow Preventer 20 Detergent Mixer 21 Water Level Detector 25 Water Supply Channel 26 On-Off Valve 27 flow rate adjusting unit 30 washing nozzle 32 motor 35 washing channel 36 ejection control unit 37 backflow prevention unit 40 control unit 50 drainage member 51 drainage port 52 recovery port 53 partition wall 55 recovery flow Path 56 On-off valve 57 Recovery unit 60 Opening/closing unit 80 Filter 80a Upper surface 81 Filtration unit 82 Frame unit 100 Bathtub 110 Inner wall surface 111 Inner bottom surface 112 Inner wall surface 115 Drainage unit 135 Detergent input mouth 200 bathtub cleaning device 510 drain valve plate 511 plate portion 512 drain hole portion 513 upwardly extending portion 514 downwardly extending portion 515 connection portion 516 notch portion 520 collection tank 521 drain pipe portion 522 tank part, 523 collection connection, 524 vent, 530 drain connection, WS water supply

Claims (4)

a detergent tank for storing detergent;
a detergent mixing unit that mixes the detergent supplied from the detergent tank and the water supplied from the water supply source to generate detergent water;
a washing nozzle for ejecting the detergent water toward the inner wall surface of the bathtub;
a washing channel connecting the detergent mixing unit and the washing nozzle;
a drainage member provided in the drainage portion of the bathtub and having a drainage port and a recovery port that open in the drainage portion;
a recovery channel for returning the detergent water recovered from the recovery port to between the detergent tank and the cleaning nozzle;
a filter provided at the recovery port;
an opening/closing unit that opens and closes the drain port and the recovery port;
with
The drain port and the recovery port are provided at a position lower than the inner bottom surface of the bathtub ,
The drainage member has a partition wall located between the drainage port and the recovery port,
The filter is provided on the partition wall,
The bathtub cleaning device, wherein the opening/closing part is opened so that the liquid that has flowed into the drain part collides with the filter and is then discharged from the drain port. 2. The bathtub washing apparatus according to claim 1 , wherein the upper surface of said filter is inclined downward toward said drain port. 3. The bathtub cleaning apparatus according to claim 1 , wherein the recovery port is provided so as to surround the drain port. The bathtub cleaning device according to any one of claims 1 to 3 , wherein the filter is detachably attached to the drainage member.

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