JP2018057522A - Bathtub washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bathtub washing device excellent in washing performance.SOLUTION: A bathtub washing device includes washing control means 9 for executing a rinsing process in which only hot water is sprayed in a bathtub 1 and a washing process in which washing liquid is sprayed in the bathtub 1. When the washing process is executed a plurality of times during a washing operation, the washing control means 9 causes the rinsing process to be executed between the washing processes, and causes the washing process to be executed after a predetermined rinsing stand-by time has elapsed after the execution of the rinsing process.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bathtub cleaning device for automatically cleaning a bathtub.

  Conventionally, when the cleaning process of spraying the cleaning liquid from the cleaning nozzle into the bathtub is intermittently performed a plurality of times, the cleaning pipe between the cleaning nozzle and the detergent mixing unit is opened by one opening operation of the detergent inlet. There has been proposed a bath cleaning apparatus that supplies a cleaning liquid continuously from the cleaning nozzle to the upstream side and sequentially pushes the cleaning liquid in the cleaning pipe toward the cleaning nozzle to perform a plurality of cleaning steps (Patent Document 1). ). According to this bathtub cleaning apparatus, since the cleaning liquid is continuously sprayed in the bathtub by repeating the cleaning process a plurality of times, the contact time between the inner wall surface of the bathtub and the cleaning liquid can be increased.

  However, when performing a plurality of cleaning steps continuously as in Patent Document 1, the cleaning solution sprayed in the next cleaning step adheres to the cleaning solution attached to the inner wall surface of the bathtub in the previous cleaning step. To do. For this reason, the cleaning liquid does not directly adhere to the dirt adhering to the inner wall surface of the bathtub, and it is difficult to obtain a sufficient cleaning ability even though the cleaning process is repeatedly performed.

  On the other hand, when a plurality of washing steps are performed during one washing operation, a rinsing step of spraying only hot water in the bathtub may be provided between the washing steps, and the washing solution may be washed away after the washing step. However, if the rinsing process is performed and the cleaning liquid is sprayed in a state where a large amount of hot water is attached to the inner wall surface of the bathtub, the cleaning liquid flows down the inner wall surface in a short time, and similarly, sufficient cleaning ability is obtained. There is no problem.

JP 2014-104305 A

  This invention solves the said subject, and the objective of this invention is providing the bathtub cleaning apparatus excellent in cleaning performance.

According to the present invention, there is provided a tub cleaning device including a rinsing process for spraying only hot water in a bathtub and a cleaning control means for executing a cleaning process for spraying a cleaning liquid in the bathtub,
The cleaning control means executes a rinsing process between cleaning processes when performing a plurality of cleaning processes.
There is provided a bathtub cleaning apparatus that performs a cleaning process after a predetermined rinsing standby time has elapsed after the rinsing process is performed.

  According to the bathtub cleaning apparatus, when a plurality of cleaning processes are performed, the rinsing process is performed between the cleaning processes, so that the cleaning liquid sprayed in the previous cleaning process can be washed away with hot water. Thereby, in the next washing | cleaning process after a rinse process, a washing | cleaning liquid can be made to adhere directly to the stain | pollution | contamination of the inner wall face of a bathtub. According to the bathtub cleaning apparatus, after the rinse process is performed between the cleaning processes, the next cleaning process is not performed until a predetermined rinse standby time elapses. It can flow down from the wall. Thereby, the hot water adhering to the inner wall surface of a bathtub is reduced, and the washing | cleaning liquid which flows down from an inner wall surface with hot water can be reduced.

Preferably, in the bathtub cleaning device,
Spraying of hot water and cleaning liquid into the bathtub is performed from the cleaning nozzle,
The cleaning nozzle is connected via a cleaning tube and a detergent mixing part that mixes detergent and hot water to produce a cleaning liquid.
The cleaning control unit fills the cleaning tube with the cleaning liquid from the detergent mixing unit before the rinsing process is completed during the rinsing process executed between the cleaning processes.

  When the cleaning nozzle that sprays the cleaning liquid is connected via a cleaning pipe and a detergent mixing unit that mixes detergent and hot water to generate the cleaning liquid, only hot water is supplied to the cleaning pipe during the rinsing process. Therefore, at the end of the rinsing process, only the hot water is filled into the cleaning pipe. When the cleaning liquid is sprayed from the cleaning nozzle in the next cleaning process, the hot water remaining in the cleaning pipe is first sprayed, and the rinse waiting time Therefore, the significance of flowing down hot water before the next cleaning step is reduced.

  However, according to the bathtub cleaning apparatus, the cleaning liquid is filled from the detergent mixing unit into the cleaning tube before the end of the rinsing process during the rinsing process executed between the cleaning processes, so that the cleaning is performed in the cleaning process after the rinsing process. The amount of hot water sprayed from the pipe can be reduced. Thereby, the adhesion of the cleaning liquid can be further improved in the next cleaning step.

  As described above, according to the present invention, it is possible to improve the adhesion of the cleaning liquid in the cleaning operation in which a plurality of cleaning steps are executed. Therefore, according to this invention, the bathtub cleaning apparatus which has high cleaning performance can be provided.

FIG. 1 is a schematic configuration diagram of a bathtub cleaning system according to an embodiment of the present invention. FIG. 2 is a part of a flowchart showing an example of a control operation in the cleaning operation of the bathtub cleaning system according to the embodiment of the present invention. FIG. 3 is a part of a flowchart showing an example of a control operation in the cleaning operation of the bathtub cleaning system according to the embodiment of the present invention. FIG. 4 is a part of a flowchart showing an example of a control operation in the cleaning operation of the bathtub cleaning system according to the embodiment of the present invention. FIG. 5 is a part of explanatory drawing of each process in the washing operation of the bathtub washing system according to the embodiment of the present invention. FIG. 6 is a part of explanatory drawing of each process in the cleaning operation of the bathtub cleaning system according to the embodiment of the present invention. FIG. 7 is a part of explanatory drawing of each process in the washing operation of the bathtub washing system according to the embodiment of the present invention.

  FIG. 1 is a schematic configuration diagram illustrating an example of a bathtub cleaning system according to the present embodiment. This bathtub cleaning system includes a bathtub 1, a bathtub cleaning device 4 for automatically cleaning the bathtub 1, hot water filling, reheating and hot water supply operation, and a water heater for supplying hot water to the bathtub cleaning device 4 during the cleaning operation. 6, a bath remote controller 10a, and a cleaning remote controller 10b.

  A drain plug 2 for draining bathtub water and a cleaning nozzle 7 for spraying hot water or cleaning liquid into the bathtub 1 are provided at the bottom of the bathtub 1. A circulating metal fitting (hot water adapter) 5 to which hot water for watering is supplied is provided. The drain plug 2 is configured to be opened and closed by a drain plug driving unit (not shown). The cleaning nozzle 7 may be provided separately from the bathtub 1.

  The water heater 6 includes a gas burner, a hot water heat exchanger, a bath heat exchanger, and a hot water control circuit 8 (not shown). A gas supply pipe 78 is connected to the gas burner. Connected to the hot water supply heat exchanger are a water supply pipe 63 for supplying clean water from a water supply source, and a hot water supply pipe 66 for supplying hot water heated from the water heater 6 to the hot water tap 65 and the bathtub cleaning device 4. Yes. Connected to the bath heat exchanger are an outgoing pipe 61 that supplies hot water to the circulation fitting 5 and a return pipe 62 that returns hot water from the circulation fitting 5. In the hot water heater 6, the return pipe 62 is connected to a hot water bypass pipe branched from the hot water supply pipe 66. The hot water supply bypass pipe includes a hot water solenoid valve that can shut off the supply of hot water, A hot and cold water mixing unit having a hot water amount sensor for adjusting the flow rate of hot water is provided. In the present embodiment, a gas water heater is used as the water heater 6, but an electric water heater or a heat pump water heater may be used.

  The bathtub cleaning device 4 of the present embodiment mixes the cleaning nozzle 7 described above, the detergent tank 41 for storing the detergent, the detergent supplied from the detergent tank 41 and the hot water supplied from the water heater 6 to obtain the cleaning liquid. Detergent mixing unit 53 to be generated, upstream and downstream hot water supply pipes 66a and 66b for supplying hot water from the water heater 6 to the detergent mixing unit 53, water amount control valve 46, temperature sensor 47, backflow prevention unit 48, detergent tank 41 The detergent introduction pipe 44 for supplying detergent to the detergent mixing section 53, the detergent valve 42 for adjusting the supply of detergent to the detergent mixing section 53 by opening and closing the detergent introduction pipe 44, and the cleaning liquid generated in the detergent mixing section 53 are washed A cleaning pipe 43 led to the nozzle 7 and a cleaning control circuit 9 are provided.

  The hot water supply pipe 66 is branched to the hot water tap 65 side and the bathtub cleaning device 4 side, and the upstream hot water supply pipe 66a branched to the bathtub cleaning device 4 side is sequentially controlled from the upstream side. A valve 46, a temperature sensor 47, and a backflow prevention unit 48 are provided. The backflow prevention unit 48 includes a water amount sensor 49, a pouring valve 50, a check valve 51, an air release valve 52, and the like. A venturi-type detergent mixing unit 53 is provided in the hot water supply pipe 66b downstream of the backflow prevention unit 48. Note that the cleaning tube 43 of the present embodiment has a larger internal volume than the spray amount of the cleaning liquid sprayed from the cleaning nozzle 7 in the cleaning process described later.

  A detergent introduction pipe 44 and a washing pipe 43 are connected to the detergent mixing section 53 connected to the hot water supply pipe 66 b on the downstream side of the backflow prevention section 48, and a detergent valve 42 is connected to the detergent introduction pipe 44. Is provided. Accordingly, when the hot water supply valve 66 is opened and hot water is supplied from the downstream hot water supply pipe 66b to the detergent mixing unit 53 with the detergent valve 42 opened, the hot water passes through the detergent mixing unit 53. The cleaning liquid is generated by mixing the detergent and the hot water with the negative pressure generated when the cleaning is performed, and the cleaning liquid is sprayed from the cleaning nozzle 7 through the cleaning tube 43, so that the bathtub 1 is cleaned. Similarly, when the detergent valve 42 is closed and the hot water supply valve 50 is opened and hot water is supplied from the downstream hot water supply pipe 66b to the detergent mixing unit 53, only hot water is sprayed from the cleaning nozzle 7. Then, preliminary rinsing and washing rinsing of the bathtub 1 are performed. Thus, in the case of the venturi-type detergent mixing unit 53, since only the amount of cleaning liquid necessary for cleaning can be generated, there is little waste of the detergent, but instead of the venturi-type detergent mixing unit 53, the detergent introduction tube 44, the detergent A tank to which the valve 42 and the hot water supply pipe 66b are connected may be provided, and the cleaning liquid may be sprayed from the cleaning nozzle 7 by a pump.

  Although not shown, the hot water supply control circuit 8 and the cleaning control circuit 9 are each composed of a microcomputer including a CPU, a ROM, and a RAM. To the hot water supply control circuit 8, a bath remote controller 10a, an original gas electromagnetic valve, a proportional valve, a hot water electromagnetic valve, a water supply sensor, a hot water amount sensor, and the like are connected via electrical wiring. The cleaning control circuit 9 is connected to a cleaning remote controller 10b, a detergent valve 42, a water amount control valve 46, a temperature sensor 47, a water amount sensor 49, a pouring valve 50, a drain plug driving unit, and the like.

  Further, the hot water supply control circuit 8 executes, as functional components, a point fire extinguishing control unit that controls the point fire extinguishing of the gas burner, a combustion amount control unit that controls the combustion amount of the gas burner, a predetermined hot water supply operation, and a hot water filling operation. And a memory storing various setting values. As a functional component, the cleaning control circuit 9 has an abnormality based on the temperature detected by the temperature sensor 47 and a valve driving unit that adjusts the opening and closing of the detergent valve 42 and the pouring valve 50 and the opening of the water amount control valve 46. An abnormal temperature detection unit for detecting temperature, a timer for measuring various elapsed times during the cleaning operation, a notification control unit for performing predetermined voice notification from the cleaning remote controller 10b, a program for executing the predetermined cleaning operation, and various set values are stored. Provided memory or the like.

  Next, the cleaning operation in the bathtub cleaning system of the present embodiment will be described with reference to FIGS. 2 to 4 are flowcharts illustrating an example of the control operation in the cleaning operation, and FIGS. 5 to 7 are explanatory diagrams illustrating the state of the cleaning pipe 43 in each step of the cleaning operation. In this cleaning operation, each process is executed in the order of preliminary rinsing process → preliminary rinsing standby process → cleaning process → cleaning standby process → cleaning rinsing process → cleaning rinsing standby process → cleaning process → cleaning standby process → final cleaning rinsing process. Depending on the dirt of the bathtub 1, the preliminary rinsing step and each standby step may be omitted, or the number of times of executing the cleaning step and the cleaning rinsing step may be reduced or further increased. The hot water supply control circuit 8 ignites the gas burner when the flow rate detected by a water supply sensor (not shown) provided in the water supply pipe 63 exceeds a predetermined flow rate, and the flow rate detected by the water supply sensor falls below the predetermined flow rate. If it becomes, it is comprised so that the point fire extinguishing control which extinguishes a gas burner may be performed.

  For example, when the user turns on a cleaning switch (not shown) of the cleaning remote controller 10b after using the bathtub 1, the drain plug 2 is opened to start draining the bathtub water in the bathtub 1 and wait for drainage. Timer t0 is started to measure time (for example, 5 minutes). When a predetermined drain standby time is reached after the drain plug 2 is opened, a cleaning start notification for starting a cleaning operation is made from a speaker (not shown) of the cleaning remote controller 10b, and the cleaning operation is started (steps ST1 to ST3).

  When the cleaning operation is started, a preliminary rinsing process is first executed. In this preliminary rinsing step, the cleaning control circuit 9 opens the pouring valve 50 and starts a timer t1 for measuring the preliminary rinsing time (for example, 30 seconds) (step ST4).

  Although not shown, when the hot water supply valve 50 is opened, clean water is supplied from the water supply pipe 63 to the water heater 6 by the water supply pressure, and when a flow rate higher than a predetermined flow rate is detected by the water supply sensor, Then, the gas burner is ignited to start the hot water supply operation, and hot water at a predetermined temperature for cleaning set by the bath remote controller 10a is discharged from the hot water supply pipe 66. Thereby, hot water is supplied to the upstream hot water supply pipe 66a, and only hot water is sprayed into the bathtub 1 from the washing nozzle 7 ((a) of FIG. 5).

  When the preliminary rinsing process is started and the timer t1 reaches a predetermined filling start time (for example, 28 seconds) before a predetermined end time set for the preliminary rinsing process, the pouring valve 50 is left open. Until the detergent valve 42 is opened (steps ST5 to ST6). Thus, the detergent and hot water are supplied to the detergent mixing unit 53 to generate a cleaning liquid, and the cleaning pipe 43 is started to be filled with the cleaning liquid ((b) to (c) in FIG. 5). Then, after the detergent valve 42 is opened, a predetermined filling time (for example, 1 second) corresponding to the spray amount of the cleaning liquid sprayed in the next cleaning process elapses, and the timer t1 is set to a predetermined filling end time ( For example, when it reaches 29 seconds, the detergent valve 42 is closed while the pouring valve 50 is kept open (steps ST7 to ST8). Thereby, only hot water is supplied to the detergent mixing unit 53.

  After the detergent valve 42 is closed, when a predetermined transfer time (for example, 1 second) elapses and the preliminary rinsing end time is reached, the pouring valve 50 is closed (steps ST9 to ST10). Accordingly, the cleaning liquid generated in the detergent mixing unit 53 is transferred to the cleaning nozzle 7 side through the cleaning tube 43 for the transfer time ((d) in FIG. 5).

  When the preliminary rinsing process is completed, a timer t2 for measuring a predetermined preliminary rinsing standby time (for example, 30 seconds) is started (step ST10). Thereby, the dirt adhering to the inner wall surface of the bathtub 1 is swollen before the next washing step, and the dirt is easily removed.

  When timer t2 reaches the preliminary rinsing standby time, pouring valve 50 is opened, and timer t3 for measuring a predetermined cleaning liquid spraying time (for example, 1 second) is started (steps ST11 to ST12). Thus, the cleaning liquid filled in the cleaning tube 43 in the preliminary rinsing process is sprayed from the cleaning nozzle 7 ((e) in FIG. 5). When the timer t3 reaches a predetermined cleaning liquid spraying time after the pouring valve 50 is opened, the pouring valve 50 is closed (steps ST13 to ST14).

  When the cleaning process is completed, a timer t4 for measuring a predetermined cleaning standby time (for example, 50 seconds) is started in the same manner as described above (step ST14). Thereby, the washing | cleaning liquid sprayed on the bathtub 1 adheres to dirt, and dirt can be made to stand up from an inner wall surface ((f) of FIG. 6).

  When the timer t4 reaches the cleaning standby time, the pouring valve 50 is opened, and a timer t5 for measuring a predetermined cleaning rinsing time (for example, 30 seconds) is started (steps ST15 to ST16). Thereby, only hot water is sprayed in the bathtub 1 from the washing nozzle 7, and the washing | cleaning liquid adhering to the inner wall face of the bathtub 1 is washed away ((g) of FIG. 6).

  When the cleaning rinsing process is started and the timer t5 reaches a predetermined filling start time (for example, 28 seconds) before a predetermined end time set for the cleaning rinsing process, the pouring valve 50 is left open. Until the detergent valve 42 is opened (steps ST17 to ST18). Thereby, detergent and hot water are supplied to the detergent mixing unit 53 to generate a cleaning liquid, and filling of the cleaning liquid into the cleaning pipe 43 is started ((h) to (i) in FIG. 6). Then, after the detergent valve 42 is opened, a predetermined filling time (for example, 1 second) corresponding to the spray amount of the cleaning liquid sprayed in the next cleaning process has elapsed, and the timer t5 has a predetermined filling end time ( For example, when it reaches 29 seconds, the detergent valve 42 is closed while the pouring valve 50 is kept open (steps ST19 to ST20). Thereby, only hot water is supplied to the detergent mixing unit 53.

  After the cleaning valve 42 is closed, when a predetermined transfer time (for example, 1 second) elapses and the cleaning rinsing end time is reached, the pouring valve 50 is closed (steps ST21 to ST22). Accordingly, the cleaning liquid generated in the detergent mixing unit 53 is transferred to the cleaning nozzle 7 side through the cleaning tube 43 for the transfer time ((j) in FIG. 6).

  When the cleaning rinsing process is completed, a timer t6 for measuring a predetermined cleaning rinsing standby time (for example, 20 seconds) is started (step ST22). Thereby, the hot water sprayed on the inner wall surface of the bathtub 1 can be flowed down before the next washing | cleaning process.

  In addition, as for the washing | cleaning rinse waiting time, 10 to 60 seconds are preferable. By setting the washing / rinsing standby time to 10 seconds or longer, the hot water sprayed and adhered to the upper part of the inner wall surface of the bathtub 1 in the washing / rinsing process before the next washing process can be substantially washed off. Moreover, the time of the whole washing | cleaning operation can be shortened by making washing | cleaning rinse waiting time into 60 second or less.

  When the timer t6 reaches the cleaning rinsing standby time, the cleaning process and the cleaning standby process are executed again in the same manner as described above (steps ST23 to ST27). As a result, when a plurality of cleaning steps are executed, only the hot water is sprayed on the bathtub 1 sprayed with the cleaning solution in the previous cleaning step to wash away the cleaning solution, and then the cleaning solution is sprayed in the next cleaning step. Therefore, the cleaning liquid can be directly adhered to the dirt of the bathtub 1 ((k) to (l) in FIG. 7). As described above, the cleaning process and the cleaning rinse process may be further repeated, and the time in each process may be changed.

  When the final cleaning process and the cleaning standby process are completed, the pouring valve 50 is opened in the same manner as described above, and a timer t9 for measuring a predetermined final cleaning rinsing end time (for example, 90 seconds) is started ( Step ST28). In this final washing and rinsing step, the detergent valve 42 is held in a closed state until the final washing and rinsing end time, and only hot water is supplied to the detergent mixing unit 53 and only the hot water is filled in the washing tube 43. The cleaning operation is terminated (step ST29). As a result, the cleaning operation can be terminated in the state where the cleaning tube 43 is filled with only hot water ((m) to (n) in FIG. 7). Accordingly, it is possible to prevent the cleaning liquid from flowing out from the cleaning nozzle 7 into the bathtub 1 when the hot water filling operation is executed after the cleaning operation. When the timer t9 reaches the final cleaning rinsing end time, the pouring valve 50 is closed and a cleaning end notification for ending the cleaning operation is issued from the speaker of the cleaning remote controller 10b (steps ST30 to ST31).

  As described above in detail, according to the present embodiment, in the cleaning operation in which the cleaning process is performed a plurality of times, the cleaning rinsing process of spraying only hot water in the bathtub 1 between the cleaning processes is performed. The cleaning liquid adhered to the inner wall surface of the bathtub 1 in the previous cleaning process can be washed away. Thereby, it can prevent that the washing | cleaning liquid sprayed by the following washing | cleaning process adheres on the washing | cleaning liquid made to adhere to the inner wall face of the bathtub 1 at the previous washing | cleaning process, and the stain | pollution | contamination of the inner wall face of the bathtub 1 at each washing | cleaning process The cleaning liquid can be directly attached to the surface.

  In addition, according to the present embodiment, when the rinsing process is performed between the cleaning processes, the next cleaning process is performed after the predetermined rinsing waiting time has elapsed, so the rinsing process is performed before the next cleaning process. Hot water sprayed in the bathtub 1 in the process can flow down from the inner wall surface of the bathtub 1. Thereby, since the hot water adhering to the inner wall surface of the bathtub 1 is reduced, it is possible to prevent the cleaning liquid sprayed into the bathtub 1 in the next washing step from flowing down from the inner wall surface together with the hot water.

  In addition, according to the present embodiment, even when the preliminary rinsing process is performed before the first cleaning process, a predetermined preliminary rinsing standby time is provided, so that the first cleaning process is performed with hot water sprayed in the preliminary rinsing process. It is also possible to prevent the cleaning liquid from flowing down.

  According to the present embodiment, the detergent valve 42 is opened before the end of each rinsing step in the preliminary rinsing step and the cleaning rinsing step between the cleaning steps. The cleaning liquid generated in the unit 53 can be filled into the cleaning tube 43 between the detergent mixing unit 53 and the cleaning nozzle 7. Thereby, since the spray amount of only the hot water sprayed from the cleaning pipe 43 is reduced at the initial stage of the cleaning process executed after each rinsing process, the adhesion of the cleaning liquid to the inner wall surface of the bathtub 1 is further improved. be able to.

  Further, according to the present embodiment, when the cleaning liquid is filled in the cleaning tube in the preliminary rinsing process or the cleaning rinsing process between the cleaning processes, the detergent valve 42 is closed before the end of each rinsing process. The cleaning liquid filled in the cleaning pipe 43 is transferred to the cleaning nozzle 7 side by the hot and cold water supplied to the detergent mixing section 53 after each rinsing step is completed after the valve is closed. Thereby, since the spray amount of only the hot water in the initial stage of the cleaning process can be reduced, the adhesion of the cleaning liquid can be further improved.

  Therefore, according to this Embodiment, the bathtub cleaning apparatus which has high cleaning performance can be provided.

(Other embodiments)
(1) In the above embodiment, the end of the rinsing process is determined by the elapsed time, but it may be determined by the amount of hot water detected by the water amount sensor 49.
(2) In the above embodiment, the cleaning liquid is filled in the cleaning tube 43 in both the preliminary rinsing step before the cleaning step and the cleaning rinsing step between the cleaning steps. A cleaning liquid may be filled. Moreover, when a washing | cleaning process is performed 3 times or more by one washing | cleaning driving | operation, you may provide the above-mentioned washing | cleaning rinse process and washing | cleaning rinse waiting process between any one washing process.
(3) In the above-described embodiment, the supply of hot water to the cleaning nozzle 7 uses the water supply pressure. However, a water receiving tank and a pump may be provided in the bathtub cleaning device 4 and hot water may be supplied by the pump. .

1 Bath 6 Water heater 7 Cleaning nozzle 9 Cleaning control circuit 43 Cleaning pipe 53 Detergent mixing section

Claims (2)

A tub cleaning device including a rinsing process for spraying only hot water in a bathtub and a cleaning control means for executing a cleaning process for spraying a cleaning liquid in the bathtub,
The cleaning control means executes a rinsing process between cleaning processes when performing a plurality of cleaning processes.
The bathtub washing apparatus which performs a washing | cleaning process after predetermined rinse waiting time passes after performing a rinse process. The bathtub cleaning apparatus according to claim 1,
Spraying of hot water and cleaning liquid into the bathtub is performed from the cleaning nozzle,
The cleaning nozzle is connected via a cleaning tube and a detergent mixing part that mixes detergent and hot water to produce a cleaning liquid.
The washing control means is a bath washing apparatus that fills the washing tube with the washing liquid from the detergent mixing unit before the rinsing process is completed during the rinsing process executed between the washing processes.

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