JP7292608B2 - bathtub cleaning equipment - Google Patents

Description

The present invention relates to a bathtub cleaning device.

In terms of cleaning power, conventional automatic bathtub cleaning is recommended to be cleaned on the day of bathing in order to sufficiently remove dirt. For this reason, there is a demand for automatic bathtub cleaning that allows the user to easily soak in a freshly washed bathtub at any time. However, in order to meet such needs, it is necessary to improve the detergency to remove stubborn stains the next day.

Further, in the conventional automatic bathtub cleaning technology, the direct pressure of the tap water has been used. Therefore, in order to popularize the automatic bathtub cleaning technology, it is necessary to avoid such water pressure restrictions.

Japanese Patent No. 5874220 JP-A-4-269935

BACKGROUND ART Conventionally, a venturi-type detergent mixing unit is known as a detergent mixing unit that dilutes a detergent with water to generate detergent water (for example, Patent Document 1). In this venturi-type detergent mixing section, the detergent and hot water are mixed by the negative pressure generated when hot water passes through the detergent mixing section to generate detergent water. That is, the amount of detergent mixed in the detergent mixing section depends on the flow velocity and flow rate of hot water passing through the detergent mixing section. Therefore, it is difficult to adjust the concentration of the detergent water to a predetermined concentration, and it is difficult to stabilize the concentration at the predetermined concentration due to fluctuations in the flow rate of the passing hot water.

On the other hand, in a bathtub cleaning apparatus, it is known to provide a tank-type detergent mixing unit (detergent mixing tank) in order to generate detergent diluted water by diluting detergent with water (for example, Patent Document 2). ). In such a bathtub cleaning apparatus, by providing the detergent mixing tank, the detergent and water can be mixed in the tank to generate the detergent water, so that the concentration of the detergent water can be easily adjusted.

However, foam may be generated in the detergent mixing tank due to the force of the water flow when the detergent or water is supplied. If foam is generated in the detergent mixing tank, it may cause jetting failure such as interruption of detergent water jetted from the washing nozzle or reduction of the jetted amount of detergent water. For this reason, the detergent water cannot be uniformly sprayed on the inner wall surface of the bathtub, which may cause uneven washing.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to propose a bathtub cleaning apparatus capable of suppressing the generation of bubbles in a detergent mixing tank.

A bathtub cleaning apparatus according to a first aspect of the invention comprises a detergent tank for storing detergent, a detergent mixing tank for mixing detergent supplied from the detergent tank and water supplied from a water supply source to generate detergent water, a washing nozzle for spraying the detergent water onto the inner wall surface of the bathtub; a detergent channel connecting the detergent tank and the detergent mixing tank; a water supply channel connecting the water supply source and the detergent mixing tank; and a washing channel connecting the detergent mixing tank and the washing nozzle. The detergent mixing tank is provided with flow velocity reducing means for reducing the flow velocity of at least one of the detergent supplied from the detergent channel and the water supplied from the water supply channel.
According to the first invention, by reducing the flow velocity of at least one of the detergent and water when the other is mixed with the other, the amount of air entrained when the detergent and water are mixed can be reduced. Therefore, it is possible to suppress the generation of foam in the detergent mixing tank. As a result, it is possible to prevent ejection failures such as interruption of the detergent water ejected from the washing nozzles and reduction in the amount of detergent water ejected.
In a second aspect based on the first aspect, the flow velocity decelerating means has a collision part provided at a position higher than the deepest part of the detergent mixing tank, and the collision part is supplied to the detergent mixing tank. It is characterized in that at least one of the water and the detergent collides with each other before reaching the deepest part of the detergent mixing tank.
According to the second invention, at least one of the water and the detergent supplied to the detergent mixing tank collides with the collision part before reaching the deepest part of the detergent mixing tank. Therefore, it is possible to reduce the flow velocity of the one when water and detergent are mixed, and to disperse them in water or detergent. This further suppresses the generation of foam and suppresses variations in detergent concentration in the detergent water.
According to a third invention, in the second invention, the collision part is configured to collide with a side wall surface of the detergent mixing tank after at least one of water and detergent supplied to the detergent mixing tank collides. ing.
According to the third invention, at least one of the water and the detergent supplied to the detergent mixing tank is caused to collide not only with the colliding portion but also with the side wall surface of the detergent mixing tank, thereby increasing the flow velocity of at least one of the water and the detergent. Since the speed can be reduced, the generation of bubbles can be further suppressed.
In a fourth aspect of the invention, in the second or third aspect, the collision part is provided at a position spaced apart from the side wall surface of the detergent mixing tank, and at least one of the water and the detergent that collides with the collision part A gap is formed in the path leading to the side wall surface of the detergent mixing tank.
According to the fourth invention, at least one of the water and the detergent supplied to the detergent mixing tank can be made to collide with the collision part to reduce the flow velocity, and at least one of the water and the detergent that has collided with the collision part can be It can be led to the area between the impingement part and the side wall of the detergent mixing tank and guided downward through the gap between the impingement part and the side wall of the detergent mixing tank. Therefore, at least one of the water and the detergent is dispersed and mixed with the other while the flow velocity of at least one of the water and the detergent is reduced to suppress the generation of foam, thereby suppressing variations in the concentration of the detergent in the detergent water. .
In a fifth aspect based on the second aspect, the collision part has an inclined surface provided at a position higher than the deepest part inside the detergent mixing tank, and the inclined surface feeds the detergent mixing tank. It is characterized in that at least one of the water and the detergent that has been dropped is configured to flow toward the deepest part of the detergent mixing tank.
According to the fifth aspect of the invention, the detergent mixing tank has a simple configuration in which an inclined surface is formed inside the detergent mixing tank. The water can be dispersed in the detergent while flowing toward the deepest part of the detergent and reducing the flow velocity.
In a sixth aspect based on the second aspect, the collision portion is a vertical wall surface portion having a vertical wall surface extending in a vertical direction, and the vertical wall surface portion is configured to disperse water and detergent supplied to the detergent mixing tank. It is characterized in that after at least one hits, it flows toward the deepest part of the detergent mixing tank.
According to the sixth invention, at least one of the water and the detergent supplied to the detergent mixing tank collides with the vertical wall surface before reaching the deepest part of the detergent mixing tank, and then flows toward the deepest part. Therefore, it is possible to reduce the flow velocity of the one when water and detergent are mixed, and to disperse them in water or detergent. This further suppresses the generation of foam and suppresses variations in detergent concentration in the detergent water.
In a seventh aspect based on any one of the second to sixth aspects, the flow velocity decelerating means is configured such that the collision position of at least one of the water supplied to the detergent mixing tank and the detergent is the collision position of the detergent mixing tank. It is characterized in that it is configured to be positioned higher than the full water level.
According to the seventh invention, when at least one of water and detergent is supplied into the detergent mixing tank, the flow speed of the one can always be reduced regardless of the water level in the detergent mixing tank. Occurrence can be further suppressed.
In an eighth aspect based on the seventh aspect, the detergent mixing tank is provided at a position higher than the full water level, and the liquid level in the detergent mixing tank exceeds a predetermined water level higher than the full water level. and an overflow port for discharging the liquid in the detergent mixing tank to the outside, and the flow velocity decelerating means is arranged so that at least one of the water supplied to the detergent mixing tank and the detergent collides at a position higher than the overflow port. is configured to be
According to the eighth invention, even if the water level rises to a position higher than the full water level due to a failure or the like, the flow velocity of at least one of the water and the detergent supplied into the detergent mixing tank can be reduced at the collision part. can.
In a ninth aspect based on the seventh or eighth aspect, it further comprises water level detection means for detecting a water level of the liquid in the detergent mixing tank, and the collision portion is configured so that water and detergent collide with the collision portion. At least one of them is configured so as not to directly hit the water level detection means.
According to the ninth invention, it is possible to perform appropriate water level detection in conjunction with the water level of the liquid in the detergent mixing tank, and prevent erroneous detection by the water level detection means. As a result, the detergent and water levels can be detected with high accuracy, and the detergent concentration of the detergent water can be controlled with higher accuracy.
In a tenth aspect based on the first aspect, the flow velocity reducing means includes a columnar portion extending upward from the bottom portion of the detergent mixing tank, and the columnar portion is adapted to reduce water and detergent supplied to the detergent mixing tank. At least one is configured to collide with the upper surface of the column before reaching the bottom of the detergent mixing tank.
According to the tenth invention, at least one of the water and the detergent supplied to the detergent mixing tank collides with the upper surface of the columnar part before reaching the deepest part of the detergent mixing tank, the flow speed is reduced, and the detergent and the water It is possible to reduce the amount of air entrained when mixing with. As a result, it is possible to suppress the generation of bubbles in the detergent mixing tank.

According to the bathtub cleaning device of the present invention, it is possible to suppress the generation of bubbles in the detergent mixing tank.

1 is a system diagram of a bathtub cleaning device according to an embodiment; FIG. It is a perspective view of the detergent mixing tank of 1st Embodiment. It is a perspective view of the detergent mixing tank of 1st Embodiment. It is a perspective view of the state which removed the cover of the detergent mixing tank of 1st Embodiment. It is a sectional view of a detergent mixing tank of a 1st embodiment. FIG. 4 is a cross-sectional view schematically showing changes in the water level in the detergent mixing tank of the first embodiment; FIG. 4 is a cross-sectional view schematically showing changes in the water level in the detergent mixing tank of the first embodiment; FIG. 4 is a cross-sectional view schematically showing changes in the detergent water level in the detergent mixing tank of the first embodiment; FIG. 4 is a cross-sectional view schematically showing changes in detergent water level in the detergent mixing tank of the first embodiment; FIG. 4 is a cross-sectional view schematically showing changes in detergent water level in the detergent mixing tank of the first embodiment; FIG. 5 is a cross-sectional view of another example of the flow velocity deceleration means in the detergent mixing tank of the first embodiment; FIG. 5 is a cross-sectional view of another example of the flow velocity deceleration means in the detergent mixing tank of the first embodiment; It is a perspective view of the detergent mixing tank of 2nd Embodiment. It is a sectional view of a detergent mixing tank of a 2nd embodiment. It is a sectional view of a detergent mixing tank of a 2nd embodiment. It is a cross-sectional view of the detergent mixing tank of 2nd Embodiment. It is a perspective view of the plate-shaped member provided in the detergent mixing tank of 2nd Embodiment. It is a cross-sectional view showing the supply of water into the detergent mixing tank of the second embodiment. It is a cross-sectional view showing the supply of water into the detergent mixing tank of the second embodiment. It is a sectional view showing the full water level of the liquid in the detergent mixing tank of the second embodiment. FIG. 11 is a cross-sectional view of another example of the flow velocity deceleration means in the second embodiment; FIG. 22 is a top view of the detergent mixing tank shown in FIG. 21 with the lid removed;

One embodiment of the present invention will be described below with reference to the accompanying drawings. In order to facilitate understanding of the description, the same constituent elements in each drawing are denoted by the same reference numerals as much as possible, and overlapping descriptions are omitted.

FIG. 1 is a system diagram of a bathtub cleaning device 200 according to an embodiment.

A bathtub cleaning device 200 of the embodiment has a detergent tank 13 , a detergent mixing tank 30 , a cleaning nozzle 25 and a controller 20 . Bathtub cleaning device 200 is installed in bathtub 100 .

The detergent tank 13 is connected to, for example, a detergent input port 11 provided on the upper surface of the rim of the bathtub 100 and stores liquid detergent input from the detergent input port 11 . A water level detection means 12 such as a float switch is provided in the detergent tank 13 .

The detergent mixing tank 30 is provided downstream of the detergent tank 13 and the water supply source WS. The detergent mixing tank 30 mixes the detergent supplied from the detergent tank 13 and the water supplied directly or indirectly (for example, after temporary storage) 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 be, for example, a water heater. The detergent mixing tank 30 stores the detergent water when the washing nozzle 25 jets the detergent water, and the detergent mixing tank 30 stores the water when the washing nozzle 25 jets the water.

A detergent channel 15 connects the detergent tank 13 and the detergent mixing tank 30 . In the middle of the detergent channel 15, for example, a first on-off valve 14, a flow rate adjusting section 16, and a pump 17 are provided.

The first on-off valve 14 is, for example, an electromagnetic valve, and opens and closes the detergent channel 15 under the control of the controller 20 . The flow rate adjusting unit 16 is provided downstream of the first on-off valve 14, for example. The flow rate adjusting section 16 is, for example, an orifice. The flow rate adjusting section 16 adjusts the flow rate of the detergent flowing through the detergent channel 15 . The flow rate adjusting unit 16 is provided as necessary and can be omitted.

The pump 17 is provided, for example, downstream of the first on-off valve 14 and the flow rate adjusting section 16 . When the first on-off valve 14 is opened and the pump 17 is driven, the detergent in the detergent tank 13 flows through the detergent channel 15 and is supplied into the detergent mixing tank 30 .

A water supply channel 24 connects the water supply source WS and the detergent mixing tank 30 . In the middle of the water supply channel 24, for example, a second on-off valve 22 and a flow rate adjusting section 23 are provided.

The second on-off valve 22 is, for example, an electromagnetic valve, and opens and closes the water supply channel 24 under the control of the controller 20 . A second on-off valve 22 controls the supply of water to the detergent mixing tank 30 . Water is supplied from the water supply source WS to the detergent mixing tank 30 by opening the second on-off valve 22 . By closing the second on-off valve 22, the supply of water from the water supply source WS to the detergent mixing tank 30 is stopped.

The flow rate adjusting section 23 is provided downstream of the second on-off valve 22, for example. The flow rate adjusting unit 23 is, for example, a constant flow valve, and adjusts the flow rate of water flowing through the water supply channel 24 .

A drain port 102 and a washing nozzle 25 are provided on the bottom surface 101 of the bathtub 100 . The washing nozzle 25 jets liquid (detergent water or water) toward the inner wall surface of the bathtub 100 . For example, the cleaning nozzle 25 is horizontally rotatable by a motor 26 .

A washing channel 21 connects the detergent mixing tank 30 and the washing nozzle 25 . For example, a pump 18 and a backflow prevention unit 19 are provided in the middle of the cleaning channel 21 .

The pump 18 is provided downstream of the detergent mixing tank 30 , sucks the liquid (detergent water or water) in the detergent mixing tank 30 , and discharges it to the washing channel 21 . The liquid discharged to the washing channel 21 is jetted from the washing nozzle 25 into the bathtub 100 .

The backflow prevention part 19 is provided downstream of the pump 18, for example. The backflow prevention unit 19 prevents bathwater stored in the bathtub 100 and liquid (detergent water or water) sprayed into the bathtub 100 from flowing back into the detergent mixing tank 30 through the washing nozzle 25 and the washing channel 21 . prevent. The backflow prevention unit 19 is, for example, a check valve or an electromagnetic valve. The backflow prevention part 19 may be composed of a plurality of check valves, a plurality of solenoid valves, or a combination of check valves and solenoid valves.

The control unit 20 is electrically connected to the first on-off valve 14, the second on-off valve 22, the pump 17, and the pump 18, and controls them. The control unit 20 also receives an input of a detection result (detection signal) of a water level detection means 60 (described later) provided in the detergent mixing tank 30 . The controller 20 can control the first on-off valve 14, the second on-off valve 22, the pump 17, and the pump 18 based on this detection result (detection signal). The control unit 20 controls the first on-off valve 14, the second on-off valve 22, the pump 17, and the pump 18, so that the liquid (detergent water or water) is injected from the washing nozzle 25 and the detergent mixing tank. Controls detergent and water supply to 30;

Next, the detergent mixing tank 30 of 1st Embodiment is demonstrated.

FIG. 2 is a perspective view of the detergent mixing tank 30 as seen from above.
FIG. 3 is a perspective view of the detergent mixing tank 30 as seen from below.
FIG. 4 is a perspective view of the detergent mixing tank 30 with the lid removed.
FIG. 5 is a cross-sectional view of the detergent mixing tank 30. As shown in FIG.

Detergent mixing tank 30 has case 31 and lid 32 . As shown in FIGS. 2 and 5 , the lid 32 is provided with a detergent supply section 34 connected to the detergent channel 15 and a water supply section 35 connected to the water supply channel 24 . As shown in FIGS. 2 and 3, the bottom of the case 31 is provided with a liquid outlet 36 connected to the cleaning channel 21 .

As shown in FIG. 5, the detergent mixing tank 30 has a first space 40 and a second space 50. As shown in FIG. The first space 40 is positioned above the second space 50 . The first space 40 is located between the detergent supply 34 and the second space 50 and between the water supply 35 and the second space 50 . The second space 50 is located below the first space 40 and is continuous with the first space 40 .

Let the height direction (or depth direction) of the detergent mixing tank 30 be the Z direction. The Z direction corresponds to the vertical direction when the detergent mixing tank 30 is installed. Two directions perpendicular to the Z direction and perpendicular to each other are defined as the X direction and the Y direction.

The first space 40 has a horizontal bottom 41 . The second space 50 has a bottom portion 52 , side walls 53 and a collision portion 51 . A step is formed between the bottom portion 41 of the first space 40 and the collision portion 51 of the second space 50 , and the collision portion 51 of the second space 50 is separated from the first space via the side wall 53 . It is continuous with the bottom 41 of 40 . A bottom 52 of the second space 50 is the deepest part of the detergent mixing tank 30 . The detergent and water supplied into the detergent mixing tank 30 begin to accumulate from the bottom 52 of the second space 50, which is the deepest part. Regardless of the water level of the liquid stored in the detergent mixing tank 30, the depth from the surface of the liquid to the deepest part is the deepest.

As will be described later, the detergent and water supplied into the detergent mixing tank 30 drop and collide with the collision portion 51 of the second space 50 .

A pair of collision portions 51 are located across the bottom portion 52 of the second space 50 in the X direction. The upper surface of each collision portion 51 is an inclined surface that is inclined downward from both ends of the case 31 in the X direction toward the bottom portion 52 . That is, the upper surface (inclined surface) of the collision portion 51 is inclined downward toward the bottom portion 52 from a position higher than the bottom portion 52 in the second space 50 .

The maximum horizontal cross-sectional area of the first space 40 is greater than the maximum horizontal cross-sectional area of the second space 50 . The overall volume of the second space 50 is smaller than the overall volume of the first space 40 .

The liquid outlet 36 leads directly to the bottom 52 of the second space 50 . Therefore, all the liquid supplied into the detergent mixing tank 30 flows out to the washing channel 21 through the bottom portion 52 of the second space 50 .

A water level detection means 60 for detecting the water level of the liquid in the detergent mixing tank 30 is provided in the detergent mixing tank 30 . The water level detection means 60 detects the water level by combining, for example, a float 62 containing a magnet and a reed switch provided inside the stem 61 . As the water level in the detergent mixing tank 30 changes, the float 62 moves up and down along the stem 61 to change the position of the float 62, so that the water level in the detergent mixing tank 30 is detected.

The stem 61 penetrates the float 62 and extends upward along the Z direction from the bottom 52 of the second space 50 . The stem 61 has an upper end supported by the lid 32 and a lower end supported by the bottom 52 of the second space 50 . A stopper 63 is provided at the upper end of the stem 61 . A stopper 63 is located in the first space 40 .

The float 62 can move up and down along the stem 61 between the bottom 52 of the second space 50 and the stopper 63 located in the first space 40 . The vertical movement of the float 62 detects the water level of the liquid stored only in the second space 50 and the water level of the liquid that fills the second space 50 and is also stored in the first space 40 above it. can do.

An overflow channel 33 is provided on the side wall of the case 31 . The overflow channel 33 communicates with the first space 40 . The water supply unit 35 is located above the upper end of the overflow channel 33 at a predetermined distance (for example, 25 mm) or more.

The bathtub cleaning device 200 of this embodiment can execute three operation modes, for example, preliminary cleaning, main cleaning, and rinsing.

First, the preliminary cleaning will be described with reference to FIGS. 6(a) to 7. FIG.

FIG. 6(a) shows a state in which water W is started to be supplied into the detergent mixing tank 30 which is in an empty state. By opening the second on-off valve 22 , water W is started to be supplied from the water source WS into the detergent mixing tank 30 through the water supply channel 24 .

The water supply portion 35 is positioned right above the collision portion 51 and the opening of the water supply portion 35 faces the collision portion 51 . Therefore, the water W supplied from the water supply section 35 into the detergent mixing tank 30 falls onto the collision section 51 .

Water W is stored in the detergent mixing tank 30, and the float 62 rises as the water level of the water W rises. As shown in FIG. 6(b), when the upper end position (first position) of the float 62 corresponding to the preset first water level L1 is detected, the second on-off valve 22 is closed, and the detergent is mixed. Water supply to the tank 30 is temporarily stopped.

Then, the pump 18 is driven, and the water W stored in the detergent mixing tank 30 flows through the liquid outflow portion 36 and the washing channel 21 and is jetted from the washing nozzle 25 into the bathtub 100 . For example, the inner wall surface of the bathtub 100 is washed with water jetted from the washing nozzle 25 (preliminary washing). As the water is jetted from the washing nozzle 25, the water level of the water W in the detergent mixing tank 30 is lowered from the first water level L1.

Due to this lowering of the water level, the detection state of the upper end position of the float 62 is cancelled. The second on-off valve 22 is opened again after the set number of seconds have elapsed since the detection was canceled, and the supply of water into the detergent mixing tank 30 is resumed as shown in FIG. While supplying water into the detergent mixing tank 30, the water injection from the washing nozzle 25 is also continued. For example, the pre-washing of the bathtub 100 is continued while the amount of water supplied into the detergent mixing tank 30 is controlled to be greater than the amount of water jetted from the washing nozzles 25 .

Then, when the upper end position of the float 62 corresponding to the first water level L1 is detected, the second on-off valve 22 is closed and the water supply to the detergent mixing tank 30 is temporarily stopped. After that, when the detection state of the upper end position of the float 62 is canceled due to the lowering of the water level, the second on-off valve 22 is opened again, and the supply of water into the detergent mixing tank 30 is resumed. Such control is repeated until a predetermined amount of water is injected into bathtub 100 .

When the pre-washing with a predetermined amount of water is completed and the lower end position of the float 62 is detected, the pump 18 is stopped after a set number of seconds has elapsed from the detection, and the detergent mixing tank 30 is emptied.

After this preliminary cleaning, main cleaning using detergent water is performed. Main cleaning will be described with reference to FIGS.

FIG. 8(a) shows a state in which the detergent C is started to be supplied into the detergent mixing tank 30 which is in an empty state. By opening the first on-off valve 14 and driving the pump 17 , the supply of the detergent C from the detergent tank 13 through the detergent channel 15 into the detergent mixing tank 30 is started.

The detergent supply part 34 is located directly above the collision part 51 and the opening of the detergent supply part 34 faces the collision part 51 . Therefore, the detergent C supplied from the detergent supply portion 34 into the detergent mixing tank 30 drops onto the collision portion 51 .

The detergent C is stored in the detergent mixing tank 30, and the float 62 rises as the water level of the detergent C rises. The detergent C is stored only in the second space 50 and is not stored in the first space 40. - 特許庁Therefore, as shown in FIG. 8B, when the lower end position (second position) of the float 62 corresponding to the preset second water level L2 is detected, the first on-off valve 14 is closed, Also, the pump 17 is stopped and the supply of the detergent C into the detergent mixing tank 30 is stopped. The detergent C is stored at a predetermined water level L2 within the second space 50 .

After that, by opening the second on-off valve 22, water W is started to be supplied into the detergent mixing tank 30 as shown in FIG. 9(a). Water W and detergent C are mixed in the detergent mixing tank 30 to generate detergent water CW as shown in FIG. 9(b). Water W continues to be supplied to a constant amount of detergent C, and the water level of detergent water CW in detergent mixing tank 30 rises.

The float 62 rises as the detergent water CW level rises. Then, when the upper end position of the float 62 corresponding to the first water level L1 is detected, the second on-off valve 22 is closed and the supply of water W into the detergent mixing tank 30 is stopped. A predetermined amount of detergent water CW is stored in the detergent mixing tank 30 .

After that, the pump 18 is driven, and the detergent water CW stored in the detergent mixing tank 30 flows through the liquid outflow portion 36 and the washing channel 21 and is jetted from the washing nozzle 25 into the bathtub 100 . For example, the inner wall surface of the bathtub 100 is washed with detergent water jetted from the washing nozzle 25 (main washing).

As the detergent water is sprayed from the washing nozzle 25, the water level of the detergent water CW in the detergent mixing tank 30 is lowered from the first water level L1 as shown in FIG. For example, after a predetermined time has elapsed since the start of main cleaning, the injection of the detergent water CW from the cleaning nozzles 25 is once stopped. While this jetting is stopped, the detergent water can be spread over the inner wall surface of the bathtub 100 and the detergent water can permeate the dirt. The injection stop timing of detergent water may be determined by water level detection by the water level detection means 60 instead of time control.

Then, the injection of detergent water from the washing nozzle 25 is started again. The detergent water remaining in the detergent mixing tank 30 may be used up as it is, or the injection may be temporarily stopped to secure time for the detergent water to permeate the inner wall surface of the bathtub 100 and dirt. A predetermined amount of detergent water stored up to the first water level L1 can be used up while repeating injection and injection stop a plurality of times to perform main washing. Alternatively, the predetermined amount of detergent water may be used up by continuously jetting without temporarily stopping the jetting.

When the main washing with a predetermined amount of detergent water is completed and the lower end position of the float 62 is detected, the pump 18 is stopped after a set number of seconds have passed since the detection, and the detergent mixing tank 30 is emptied.

After this main cleaning, water is jetted from the cleaning nozzle 25 into the bathtub 100 by the same control as that of the pre-cleaning, and the rinsing mode is executed. In this rinsing mode, the detergent water sprayed into the bathtub 100 is washed away together with the dirt.
Alternatively, the detergent water sprayed into the bathtub 100 from the washing nozzle 25 may be collected in the detergent mixing tank 30, and the collected detergent water may be sprayed again into the bathtub 100 from the washing nozzle 25. .

The water supply portion 35 opens toward the upper portion of the collision portion 51 having a downward slope, which is a region where the detergent is stored relatively shallow (or a region where the detergent is not stored). Therefore, as shown in FIG. 9A, the water W falls from the water supply portion 35 to the collision portion 51 and collides therewith. After dropping onto the collision portion 51 , the water W flows toward the bottom portion 52 along the downward slope of the collision portion 51 .

Therefore, according to the embodiment, after the water is dropped (impacted) on the collision part 51, the water can be mixed with the detergent at a lower flow rate than when the water directly lands on the surface of the water. That is, the collision part 51 functions as a flow velocity deceleration means. By slowing down the flow rate of the water when it is mixed with the detergent, it is possible to reduce the amount of air entrained when the detergent and water are mixed. Therefore, the generation of bubbles in the detergent mixing tank 30 can be suppressed. As a result, it is possible to suppress ejection failures such as interruption of the detergent water ejected from the washing nozzle 25 and reduction in the amount of detergent water ejected.

It should be noted that even in the case where the water is stored first and then the detergent is supplied and the water and the detergent are mixed, the detergent is dropped (impacted) on the collision part 51 and then landed directly on the water surface. The flow rate can be reduced to allow the detergent to mix with the water. By reducing the flow velocity of the detergent when it is mixed with water, the amount of air entrained when the detergent and water are mixed can be reduced. Therefore, the generation of bubbles in the detergent mixing tank 30 can be suppressed.

The water supplied from the water supply part 35 into the detergent mixing tank 30 collides with a collision part 51 provided at a position higher than the bottom part 52 before reaching the bottom part 52 which is the deepest part of the detergent mixing tank 30.例文帳に追加Therefore, the flow velocity of water when water is mixed with the detergent can be reduced, and the water can be dispersed in the detergent. This further suppresses the generation of foam and suppresses variations in detergent concentration in the detergent water.

With a simple structure in which the collision part 51 is formed by inclining a part of the bottom of the detergent mixing tank 30, the water supplied to the detergent mixing tank 30 is caused to drop into the collision part 51, and then the detergent mixing tank 30 is dropped. The water can be dispersed in the detergent as it flows toward the bottom 52 to reduce the flow rate.

FIG. 11(a) is a cross-sectional view of another example of the flow velocity deceleration means in the detergent mixing tank 30 of the embodiment.

In the example shown in FIG. 11(a), a columnar portion 71 is provided in the detergent mixing tank 30 as a flow velocity decelerating means. Columnar portion 71 extends upward from bottom portion 52 of detergent mixing tank 30 . The upper surface of the columnar portion 71 is spaced apart from the water supply portion 35 and positioned directly below the opening of the water supply portion 35 .

The water W supplied from the water supply section 35 into the detergent mixing tank 30 collides with the upper surface of the columnar section 71 before reaching the bottom section 52 of the detergent mixing tank 30 . Therefore, the flow velocity of the water W when the water W is mixed with the detergent C can be reduced, and the water W spread by the collision with the columnar portion 71 can be dispersed in the detergent C. This further suppresses the generation of foam and suppresses variations in detergent concentration in the detergent water.

Further, the collision position (upper surface of the columnar portion 71) of the water W supplied to the detergent mixing tank 30 is configured to be higher than the full water level L1 of the detergent mixing tank 30.

With such a configuration, when water is supplied into the detergent mixing tank 30, regardless of the water level in the detergent mixing tank 30, the water can always collide with the columnar portion 71 to reduce the flow velocity. can be further suppressed.

FIG. 11(b) is a cross-sectional view of still another example of the flow velocity deceleration means in the detergent mixing tank 30 of the embodiment.

In the example shown in FIG. 11(b), a vertical wall surface portion 72 is provided inside the detergent mixing tank 30 as a flow velocity decelerating means. The vertical wall surface portion 72 has, for example, a vertical wall surface 72a that hangs down from the lid 32 and extends in the vertical direction. A lower end of the vertical wall portion 72 is separated from the bottom portion 52 of the detergent mixing tank 30 . The opening of the water supply portion 35 faces the vertical wall surface 72 a of the vertical wall surface portion 72 .

Therefore, the water is supplied from the water supply portion 35 toward the vertical wall surface 72a, collides with the vertical wall surface 72a before reaching the bottom portion 52, and then flows toward the bottom portion 52. As shown in FIG. Therefore, the flow velocity of water when water is mixed with the detergent can be reduced, and the water can be dispersed in the detergent. This further suppresses the generation of foam and suppresses variations in detergent concentration in the detergent water.

Further, the collision position (the upper portion of the vertical wall surface 72a) of the water W supplied to the detergent mixing tank 30 is configured to be higher than the full water level L1 of the detergent mixing tank 30.

With such a configuration, when water is supplied into the detergent mixing tank 30, regardless of the water level in the detergent mixing tank 30, the water can always collide with the vertical wall surface 72a to reduce the flow velocity. can be further suppressed.

In addition, the side wall of the detergent mixing tank 30 may function as a vertical wall surface as a flow velocity deceleration means. That is, the water may be supplied from the water supply unit 35 toward the side wall of the detergent mixing tank 30 , collide with the side wall of the detergent mixing tank 30 before reaching the bottom 52 , and then flow toward the bottom 52 .

FIG. 12(a) is a cross-sectional view along the X direction of still another example of the detergent mixing tank 30 of the embodiment.
FIG. 12(b) is a cross-sectional view along the Y direction of the detergent mixing tank 30 shown in FIG. 12(a).

In the detergent mixing tank 30 shown in FIGS. 12(a) and 12(b), the second space 50 is not provided with an inclined surface. In the cross-sectional view shown in FIGS. 12A and 12B, the second space 50 is provided so as to protrude downward from the bottom portion 41 of the first space 40 . The bottom 41 of the first space 40 forms a step with the bottom 52 of the second space 50 and is positioned higher than the bottom 52 of the second space 50 .

That is, the bottom portion 41 of the first space 40 functions as a collision portion provided at a position higher than the bottom portion 52 of the second space 50 which is the deepest portion of the detergent mixing tank 30 . A bottom portion 41 of the first space 40, which is the collision portion, is formed horizontally without being inclined. After dropping the water supplied to the detergent mixing tank 30 to the collision part (the bottom part 41 of the first space 40), it is caused to flow toward the bottom part 52, which is the deepest part of the detergent mixing tank 30, to reduce the flow velocity. The water can be dispersed in the detergent while

Next, the detergent mixing tank 130 of 2nd Embodiment is demonstrated. In the bathtub cleaning apparatus 200 shown in FIG. 1 described above, the detergent mixing tank 130 of the second embodiment can be applied instead of the detergent mixing tank 30 of the first embodiment.

FIG. 13 is a perspective view of the detergent mixing tank 130 of the second embodiment.

Let the height direction (or depth direction) of the detergent mixing tank 130 be the Z direction. The Z direction corresponds to the vertical direction when the detergent mixing tank 130 is installed. Two directions perpendicular to the Z direction and perpendicular to each other are defined as the X direction and the Y direction.

FIG. 14 is a cross-sectional view of the detergent mixing tank 130 parallel to the XZ plane.
FIG. 15 is a cross-sectional view of the detergent mixing tank 130 parallel to the YZ plane. FIG. 15 shows a cross section of a portion where the first space 140 and the second space 150 are continuous in the Z direction.
FIG. 16 is a cross-sectional view of the detergent mixing tank 130 parallel to the XY plane. FIG. 16 shows a cross section of a portion above the plate member 120. FIG.

Detergent mixing tank 130 has case 131 and lid 132 . The lid 132 is provided with a detergent supply portion 134 connected to the detergent channel 15 and a water supply portion 135 connected to the water supply channel 24 . A liquid outlet 136 connected to the cleaning flow path 21 is provided at the bottom of the case 131 .

As shown in FIGS. 14 and 15, detergent mixing tank 130 has first space 140 and second space 150 . The second space 150 is positioned below the first space 140 and is continuous with the first space 140 . The maximum horizontal cross-sectional area of the second space 150 is smaller than the maximum horizontal cross-sectional area of the first space 140 . The total volume of second space 150 is smaller than the total volume of first space 140 .

A bottom 152 of the second space 150 is the deepest part of the detergent mixing tank 130 . The detergent and water supplied into the detergent mixing tank 130 begin to accumulate from the bottom 152 of the second space 150, which is the deepest part. Regardless of the level of the liquid (water, detergent, detergent water) stored in the detergent mixing tank 130, the depth from the liquid surface to the deepest part is the deepest.

The liquid outlet 136 communicates directly with the bottom 152 of the second space 150 . Therefore, the liquid supplied into the detergent mixing tank 130 flows out to the washing channel 21 through the bottom portion 152 of the second space 150 .

A water level detection means 160 for detecting the water level of the liquid in the detergent mixing tank 130 is provided in the detergent mixing tank 130 . The water level detection means 160 can detect the water level by combining, for example, a float 162 containing a magnet and a reed switch provided in the stem 161 . As the liquid level in the detergent mixing tank 130 changes, the float 162 moves up and down along the stem 161 to change the position of the float 162, whereby the liquid level in the detergent mixing tank 130 is detected.

The stem 161 penetrates the float 162 and extends upward along the Z direction from the bottom 152 of the second space 150 . The stem 161 has an upper end supported by the lid 132 and a lower end supported by the bottom 152 of the second space 150 . A stopper 163 is provided on the stem 161 . A stopper 163 is located in the first space 140 .

The float 162 can move up and down along the stem 161 between the second space 150 and the stopper 163 . The vertical movement of the float 162 detects the water level of the liquid stored only in the second space 150 and the water level of the liquid that fills the second space 150 and is also stored in the first space 140 above it. can do.

The first space 140 has a first area located directly above the second space 150 and a second area adjacent to the first area in the X direction. At the bottom of the second region, an inclined surface (inclined bottom) 142 is formed as shown in FIG. The inclined surface 142 slopes downward from the lower end of the side wall surface 141 b of the detergent mixing tank 130 toward the second space 150 .

An overflow channel 133 extends in the Z direction in the first space 140 through the inclined surface 142 . An overflow port 133 a is formed at the upper end of the overflow channel 133 . Overflow port 133 a communicates with first space 140 .

The water supply section 135 has an opening leading to the first space 140 . The opening of the water supply part 135 is located above the overflow port 133a at a predetermined distance (for example, 25 mm) or more.

A plate member 120 is provided in the first space 140 . As shown in FIG. 16, the plate member 120 has, for example, a rectangular outer shape when viewed from above. At the center of the top surface of the plate-like member 120, a collision part 121 is provided that functions as a flow velocity deceleration means.

Each of the four outer edge portions of the plate-like member 120 faces the four side wall surfaces 141a, 141b, 141c, 141d of the detergent mixing tank 130 with a gap 180 therebetween. The side wall surfaces 141 a , 141 b , 141 c , 141 d surround the first space 140 . The gap 180 is formed in the entire circumference so as to surround the outer edge of the plate member 120 . Alternatively, the gap 180 may be configured to be formed between a part of the collision part 121 and a part of the side wall surface of the detergent mixing tank 130 .

The plate-like member 120 has an inclined surface 122 inclined downward from the collision portion 121 toward the side wall surfaces 141a, 141b, 141c, and 141d of the detergent mixing tank 130, respectively. For example, the plate-like member 120 is formed in an umbrella shape with the collision part 121 as the apex.

FIG. 17 is a perspective view of the plate member 120 as viewed from the bottom side.

A first mounting portion 123 and a second mounting portion 124 are provided on the lower surface of the plate-like member 120 so as to be separated from each other in the longitudinal direction of the plate-like member 120 . A notch 125 is formed at the end of the plate member 120 on the side where the second mounting portion 124 is provided.

As shown in FIG. 14 , ribs 149 are provided on side wall surface 141 b of detergent mixing tank 130 . A concave first attachment portion 123 of the plate-like member 120 is engaged with the rib 149 , and a part of the plate-like member 120 on one end side is supported on the upper end of the rib 149 .

On the other end side of the plate-like member 120, the stem 161 of the water level detection means 160 passes through the notch 125, and the stopper 163 provided on the stem 161 is engaged with the slit formed in the second mounting portion 124. However, the second mounting portion 124 is supported on the stopper 163 .

A flange portion 164 (shown in FIGS. 14 and 16) provided on the stem 161 prevents the plate-like member 120 from rising upward.

As shown in FIGS. 14 and 15, the plate member 120 is provided in the first space 140 above the overflow port 133a. The collision part 121 is provided at a position higher than the bottom part 152 of the second space 150 which is the deepest part of the detergent mixing tank 130 . Moreover, the collision part 121 is provided at a position higher than the overflow port 133a.

A bathtub cleaning apparatus 200 equipped with a detergent mixing tank 130 of the second embodiment can perform three operation modes of pre-cleaning, main cleaning, and rinsing, as in the first embodiment. Operation sequences and controls can also be applied to the second embodiment.

The generation of detergent water in the detergent mixing tank 130 in, for example, main washing will be described below.

The detergent supply part 134 is located above the second space 150 , and the opening of the detergent supply part 134 faces the second space 150 through the first space 140 . In addition, the plate-like member 120 does not spread below the opening of the detergent supply part 134, and the detergent supplied from the detergent supply part 134 into the detergent mixing tank 130 is not blocked by the plate-like member 120 and flows through the first opening. It is supplied to the second space 150 via the space 140 . Detergent begins to pool from the bottom 152 of the second space 150 .

18 and 19 are cross-sectional views showing a state in which the detergent C is stored in the second space 150. FIG. 18 corresponds to the section of FIG. 14 and FIG. 19 corresponds to the section of FIG.

As in the first embodiment, detergent C is stored only in second space 150 and is not stored in first space 140 . Therefore, when the second position of the float 162 corresponding to the preset second water level L2 is detected, the supply of the detergent C into the detergent mixing tank 130 is stopped. Detergent C is stored at a predetermined water level L2 within second space 150 .

Next, water is supplied from the water supply unit 135 into the detergent mixing tank 130 .

The opening of the water supply part 135 is located right above the collision part 121 and faces the collision part 121 . Therefore, the water supplied from the water supply portion 135 into the detergent mixing tank 130 falls onto the collision portion 121 .

The water supplied from the water supply part 135 into the detergent mixing tank 130 collides with the collision part 121 provided at a position higher than the bottom part 152 before reaching the bottom part 152 which is the deepest part of the detergent mixing tank 130 . After the water is dropped (impacted) on the collision part 121, the water is mixed with the detergent C by decreasing the flow velocity rather than directly landing on the liquid surface of the detergent C stored in the second space 150. - 特許庁be able to.

By slowing down the flow rate of the water when the water is mixed with the detergent C, the amount of air entrained when the detergent C and water are mixed can be reduced, and the generation of bubbles in the detergent mixing tank 130 can be suppressed. can. As a result, it is possible to suppress ejection failures such as interruption of the detergent water ejected from the washing nozzle 25 and reduction in the amount of detergent water ejected.

Note that even when water is first stored in the detergent mixing tank 130 and then the detergent is supplied into the detergent mixing tank 130 to mix the water and the detergent, the detergent falls (collides) to the collision part 121. After allowing the detergent to mix with the water, the flow rate can be reduced. By slowing down the flow velocity of the detergent when the detergent is mixed with water, the amount of air entrained when the detergent and water are mixed can be reduced, and the generation of bubbles in the detergent mixing tank 130 can be suppressed. Both detergent and water may be configured to collide with the collision portion 121 . Further, the collision portion with which the detergent collides and the collision portion with which water collides may have different configurations.

After falling onto the collision part 121, the water flows along the downward slope of the inclined surface 122 of the plate-like member 120 toward the side walls 141a, 141b, 141c, 141d of the detergent mixing tank 130, and the side walls 141a, 141b. , 141c, 141d.

Water that collides with the side wall surfaces 141a, 141b, 141c, and 141d flows through the gaps 180 between the plate-like member 120 and the side wall surfaces 141a, 141b, 141c, and 141d to areas below the plate-like member 120.

In the region below the plate-shaped member 120, water flows downward through the side wall surfaces 141a, 141b, 141c, and 141d as indicated by white arrows in FIGS. It reaches the stored detergent C. Water flowing through the side wall surface 141b, a portion of the side wall surface 141c (a portion without the second space 150 below), and a portion of the side wall surface 141d (a portion without the second space 150 below) forms an inclined surface. It reaches the detergent C stored in the second space 150 via 142 .

The water supplied into the detergent mixing tank 130 is caused to collide not only with the collision part 121 but also with the side wall surfaces 141a, 141b, 141c, and 141d of the detergent mixing tank 130, thereby further reducing the flow velocity of the water. The generation of bubbles can be further suppressed.

Collision portion 121 is provided at a position spaced apart from side wall surfaces 141a, 141b, 141c, and 141d of detergent mixing tank 130, and gap 180 is formed in the path of water that collides with collision portion 121 toward side wall surfaces 141a, 141b, 141c, and 141d. is formed.

The water supplied to the detergent mixing tank 130 can collide with the collision part 121 to reduce the flow velocity, and the water that has collided with the collision part 121 can flow between the collision part 121 and the side wall surfaces 141a, 141b, 141c, and 141d. It can be guided to an area between them and guided downward through a gap 180 located at a position displaced from the collision part 121 in the XY plane direction. Therefore, it is possible to reduce the flow velocity of the water to suppress the generation of bubbles, while dispersing the water and mixing it with the detergent C, thereby suppressing variations in the concentration of the detergent in the detergent water. Further, by dispersing the water, the side wall surfaces 141a, 141b, 141c, and 141d and the inclined surface 142 can be washed evenly by the water supplied into the detergent mixing tank 130 during pre-cleaning and rinsing.

In the embodiment, the plate member 120 is configured to guide water to each of the side wall surfaces 141a, 141b, 141c, and 141d surrounding the four sides (omnidirectional) of the detergent mixing tank 130, thereby dispersing the water omnidirectionally. The water can be mixed with the detergent C more uniformly. In addition, after the water is caused to collide with the collision portion 121, the water may be guided only in a certain specific direction, two directions, or three directions.

Note that depending on the size of the gap 180, the inclination angle of the inclined surface 122 of the plate member 120, the flow rate and force of the water, the water may collide with the side wall surfaces 141a, 141b, 141c, and 141d after colliding with the colliding portion 121. You may not. Even in this case, the water is guided downward toward the second space 150 through the gap 180 while being dispersed.

Water is continuously supplied to a constant amount of detergent C, and the water level of the detergent water in the detergent mixing tank 130 rises.

FIG. 20 is a cross-sectional view corresponding to FIG. 14 showing a state in which the detergent water CW is stored in the detergent mixing tank 130. As shown in FIG.

The float 162 rises as the detergent water CW level rises. Then, when the upper end position (first position) of the float 162 corresponding to the first water level L1 is detected, the supply of water into the detergent mixing tank 130 is stopped. The first water level L1 corresponds to the full level of liquid stored in the detergent mixing tank 130 .

Thereafter, the detergent water CW stored in the detergent mixing tank 130 flows through the liquid outflow portion 136 and the washing channel 21 and is jetted from the washing nozzle 25 into the bathtub 100 . For example, the inner wall surface of the bathtub 100 is washed with detergent water sprayed from the washing nozzles 25 .

Since the collision part 121 is provided at a position higher than the full water level, water is always caused to collide with the collision part 121 regardless of the water level in the detergent mixing tank 130 when water is supplied into the detergent mixing tank 130. can be used to reduce the flow velocity and suppress the generation of bubbles.

The overflow port 133a is provided at a position higher than the full water level, and when the water level of the liquid in the detergent mixing tank 130 exceeds a predetermined water level higher than the full water level, the liquid in the detergent mixing tank 130 flows into the overflow channel. 133 and discharged to the outside of the detergent mixing tank 130 .

Since the impingement portion 121 is provided at a position higher than the overflow port 133a, even if the water level rises to a position higher than the full water level due to a failure or the like, the flow velocity of the water supplied into the detergent mixing tank 130 collides. It can be decelerated in section 121 . The overflow port 133 a is provided below the collision part 121 so that the water level in the detergent mixing tank 130 does not reach the collision part 121 .

The plate-like member 120 is provided so as to cover the overflow port 133a, and the water supplied from the water supply unit 135 is blocked by the plate-like member 120 and does not flow into the overflow port 133a.

Also, the plate-like member 120 covers a region between the second space 150 and the stopper 163 where the float 162 moves up and down. Therefore, the water that has been supplied into the detergent mixing tank 130 and has collided with the colliding portion 121 does not directly drop (do not hit) the float 162 . Therefore, the float 162 can move appropriately in conjunction with the water level in the detergent mixing tank 130, and erroneous detection by the water level detection means 160 can be prevented. Therefore, the liquid level in the detergent mixing tank 130 can be detected with high accuracy, and the detergent concentration of the detergent water can be controlled with higher accuracy. The shape of the collision portion 121 is, for example, a concave surface, or a curved surface or an inclined surface in which the outer side is positioned higher than the center, so that the water after colliding with the collision portion 121 does not hit the float 162 directly. can be

The water supplied into the detergent mixing tank 130 may bounce off the side wall surfaces 141a, 141b, 141c, 141d and the inclined surface 142 and then indirectly hit the float 162. The amount of liquid that hits 162 is small and does not affect the movement of float 162 .

FIG. 21 is a cross-sectional view of another example of the flow velocity deceleration means in the second embodiment.
FIG. 22 is a top view of the detergent mixing tank 130 shown in FIG. 21 with the lid removed.

In the example shown in FIGS. 21 and 22, a columnar portion 170 is provided inside the detergent mixing tank 130 as the flow velocity decelerating means. The columnar portion 170 extends upward from the bottom portion of the detergent mixing tank 130 (the bottom portion on which the inclined surface 142 is formed in this example). An upper surface 171 of the columnar portion 170 is separated from the opening of the water supply portion 135 and positioned directly below the opening of the water supply portion 135 .

The water supplied from the water supply part 135 into the detergent mixing tank 130 collides with the upper surface 171 of the columnar part 170 before reaching the bottom part 152 of the second space 150 . Therefore, the flow velocity of water when water is mixed with the detergent can be reduced, and the generation of bubbles can be suppressed.

Further, as shown in FIG. 21, the upper surface 171 of the columnar portion 170 is formed into a concave surface, or a curved surface or an inclined surface in which the outer side is higher than the center. Can be spread over a more distant area and dropped downwards. Therefore, the water can be dispersed and mixed with the detergent, and variations in detergent concentration in the detergent water can be suppressed. In some cases, it is also possible to cause the water to collide with the side wall surfaces 141a, 141b, 141c, and 141d after colliding with the top surface 171 of the columnar portion 170 .

The upper surface 171 of the columnar portion 170 is located higher than the overflow port 133 a and the full water level of the detergent mixing tank 130 .

In addition, due to the shape of the upper surface 171 of the columnar portion 170 (a concave surface, or a curved surface or an inclined surface in which the outer side is higher than the center), the detergent is supplied into the mixing tank 130 and after colliding with the upper surface 171 of the columnar portion 170 . of water (or detergent) can be prevented from falling (impacting) directly against the float 162 .

21 and 22 and the upper surface (collision part) of the columnar part 71 shown in FIG. A gap is formed in the path along which at least one of the water and the detergent that has been mixed is directed to the side wall surface of the detergent mixing tank 30 , 130 . At least one of water and detergent that has collided with the collision part is guided to a region between the collision part and the side wall surface of the detergent mixing tank, and guided downward through a gap between the collision part and the side wall surface of the detergent mixing tank. be able to. The gap is formed in the entire circumferential direction around the columnar portions 71 and 170 . Alternatively, the gap may be configured to be formed between a part of the collision part (the upper surface of the columnar part 71, 170) and a part of the side wall surface of the detergent mixing tank 30, 130.

As the flow velocity deceleration means, there is a configuration in which water is ejected toward the top surface of the detergent mixing tank 130 (the back surface of the lid 132), that is, a configuration in which the top surface itself is used as a collision portion, or a configuration in which a separate collision portion is provided on the top surface. There may be. Before reaching the bottom 152 of the detergent mixing tank 130, the water (or detergent) supplied into the detergent mixing tank 130 reaches the top surface (or top surface) of the detergent mixing tank 130 which is higher than the bottom 152. collision part provided in the detergent mixing tank 130), the flow speed is reduced rather than directly landing on the liquid surface of the detergent (or water) previously stored in the detergent mixing tank 130, and one of the water and the detergent is transferred to the other. can be mixed into

The water level detection means 60 and 160 are not limited to the configuration using the float, and may be, for example, an electrode-type sensor that detects the water level by applying a voltage between electrodes.

The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to them, and various modifications are possible based on the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 100... Bathtub 200... Bathtub cleaning apparatus 13... Detergent tank 14... First on-off valve 15... Detergent flow path 19... Backflow prevention part 20... Control part 21... Washing flow path 22... Second opening/closing valve 24 water supply channel 25 washing nozzle 30, 130 detergent mixing tank 40, 140 first space 50, 150 second space 51, 121 collision portion 60, DESCRIPTION OF SYMBOLS 160... Water level detection means, 62... Float, 71, 170... Columnar part, 133a... Overflow port, WS... Water supply source

Claims (9)

a detergent tank for storing detergent;
a detergent mixing tank for mixing detergent supplied from the detergent tank and water supplied from a water supply source to generate detergent water;
a washing nozzle for injecting the detergent water onto the inner wall surface of the bathtub;
a detergent channel connecting the detergent tank and the detergent mixing tank;
a water supply channel connecting the water supply source and the detergent mixing tank;
a washing channel connecting the detergent mixing tank and the washing nozzle;
with
The detergent mixing tank includes a flow speed reduction means for reducing the flow speed of at least one of the detergent supplied from the detergent channel and the water supplied from the water supply channel ,
The flow velocity deceleration means has a collision part provided at a position higher than the deepest part of the detergent mixing tank,
The bathtub cleaning device, wherein the collision part collides with at least one of water and detergent supplied to the detergent mixing tank before reaching the deepest part of the detergent mixing tank. 2. The bathtub cleaning apparatus according to claim 1 , wherein the collision part collides with a side wall surface of the detergent mixing tank after at least one of water and detergent supplied to the detergent mixing tank collides with the collision part. The collision part is provided at a position spaced apart from a side wall surface of the detergent mixing tank,
3. The bathtub cleaning apparatus according to claim 1 , wherein a gap is formed in a path in which at least one of the water and the detergent that has collided with the collision part is directed to the side wall surface of the detergent mixing tank. The collision part has an inclined surface provided at a position higher than the deepest part inside the detergent mixing tank,
2. The bathtub cleaning apparatus according to claim 1 , wherein the inclined surface is configured such that at least one of the water and the detergent supplied to the detergent mixing tank falls and then flows toward the deepest part of the detergent mixing tank. . The collision portion is a vertical wall surface portion having a vertical wall surface extending in a vertical direction,
2. The bathtub cleaning method according to claim 1 , wherein the vertical wall portion is configured to flow toward the deepest portion of the detergent mixing tank after being hit by at least one of the water and the detergent supplied to the detergent mixing tank. Device. 6. The method according to any one of claims 1 to 5 , wherein the flow velocity deceleration means is configured such that a collision position of at least one of the water supplied to the detergent mixing tank and the detergent is higher than the full water level of the detergent mixing tank. A bathtub cleaning device according to any one of the above. The detergent mixing tank is provided at a position higher than the full water level, and when the water level of the liquid in the detergent mixing tank exceeds a predetermined water level higher than the full water level, the liquid in the detergent mixing tank is discharged to the outside. Equipped with an overflow port to
7. The bathtub cleaning apparatus according to claim 6 , wherein said flow speed reducing means is configured such that at least one of the water and detergent supplied to said detergent mixing tank collides at a position higher than said overflow port. Furthermore, it comprises a water level detection means for detecting the water level of the liquid in the detergent mixing tank,
The bathtub cleaning device according to claim 6 or 7 , wherein the collision part is configured so that at least one of water and detergent that collides with the collision part does not directly hit the water level detection means. a detergent tank for storing detergent;
a detergent mixing tank for mixing detergent supplied from the detergent tank and water supplied from a water supply source to generate detergent water;
a washing nozzle for injecting the detergent water onto the inner wall surface of the bathtub;
a detergent channel connecting the detergent tank and the detergent mixing tank;
a water supply channel connecting the water supply source and the detergent mixing tank;
a washing channel connecting the detergent mixing tank and the washing nozzle;
with
The detergent mixing tank includes a flow speed reduction means for reducing the flow speed of at least one of the detergent supplied from the detergent channel and the water supplied from the water supply channel,
the flow velocity deceleration means comprises a columnar portion extending upward from the bottom of the detergent mixing tank,
The columnar portion is configured such that at least one of water and detergent supplied to the detergent mixing tank collides with the upper surface of the columnar portion before reaching the bottom portion of the detergent mixing tank. Device.

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