JP6944771B2 - Bathtub cleaning device - Google Patents

Description

The present invention relates to a bathtub cleaning device that automatically cleans a bathtub.

Conventionally, when the cleaning process of spraying the cleaning liquid from the cleaning nozzle into the bathtub is performed intermittently a plurality of times, the cleaning pipe between the cleaning nozzle and the detergent mixing portion is opened by opening the detergent inlet once. A bathtub cleaning device that executes a plurality of cleaning steps by supplying the cleaning liquid continuously from the cleaning nozzle to the upstream side and sequentially pushing out the cleaning liquid in the cleaning pipe toward the cleaning nozzle has been proposed (Patent Document 1). ). According to this bathtub cleaning device, by repeating the cleaning process a plurality of times, the cleaning liquid is continuously sprayed into the bathtub, so that the contact time between the inner wall surface of the bathtub and the cleaning liquid can be lengthened.

However, when a plurality of cleaning steps are continuously executed as in Patent Document 1, the cleaning liquid sprayed in the current cleaning step adheres on the cleaning liquid adhered to the inner wall surface of the bathtub in the previous cleaning step. do. Therefore, 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 sufficient cleaning ability even though the cleaning step is repeatedly executed.

On the other hand, when the washing process is executed a plurality of times during one washing operation, it is conceivable to provide a rinsing step of spraying only hot water in the bathtub between the washing steps and wash away the washing liquid each time after the washing step. In the conventional bath cleaning device, the detergent is supplied to the detergent mixing portion only in the cleaning step, and the detergent is not supplied to the detergent mixing portion in the rinsing step, but only hot water is supplied. Therefore, when the detergent mixing portion that generates the cleaning liquid and the cleaning nozzle are connected by a cleaning pipe, only hot water stays in the cleaning pipe at the end of the rinsing process. When the cleaning step is executed after such a rinsing step, only the hot water that has accumulated in the cleaning pipe at the beginning of the cleaning step is first sprayed into the bathtub, and then the cleaning liquid is sprayed. Therefore, since the cleaning liquid is sprayed on the hot water adhering to the inner wall surface, the adhesion of the cleaning liquid to the inner wall surface is lowered, and the cleaning liquid runs down in a short time, and similarly, sufficient cleaning ability cannot be obtained. There is a problem. Therefore, in order to attach a sufficient amount of the cleaning liquid to the inner wall surface in the cleaning process after the rinsing process, the time of the cleaning process of spraying the cleaning liquid must be lengthened, and the consumption of detergent increases. There is. Further, in order to reduce the adhesiveness of the cleaning liquid when the hot water is attached to the inner wall surface as described above, only the hot water is used in the bathtub in order to wash away the hair and dust adhering to the inner wall surface in advance before the first cleaning process. The same problem arises when the pre-rinsing step of spraying is performed.

Japanese Unexamined Patent Publication No. 2014-104305

The present invention solves the above problems, and an object of the present invention is to provide a bathtub cleaning device having excellent cleaning performance.

According to the present invention
A cleaning nozzle that sprays hot water or cleaning liquid into the bathtub,
A detergent tank that stores detergent and
A detergent mixing part that mixes the detergent supplied from the detergent tank and the hot water supplied from the water heater to generate a cleaning liquid,
A hot water supply pipe that supplies hot water from the water heater to the detergent mixing section,
A pouring valve that opens and closes the hot water supply pipe,
Detergent introduction pipe that supplies detergent from the detergent tank to the detergent mixing part,
A detergent valve that opens and closes the detergent introduction pipe,
A cleaning pipe that connects the detergent mixing part and the cleaning nozzle,
A bathtub cleaning device comprising a rinsing step of spraying only hot water from a cleaning nozzle onto a bathtub and a cleaning control means for executing a cleaning step of spraying a cleaning liquid from a cleaning nozzle onto a bathtub.
The cleaning pipe has an internal volume larger than the amount of the cleaning liquid sprayed from the cleaning nozzle in the cleaning process.
When the cleaning process is performed after the rinsing process, the cleaning control means opens the detergent valve during the rinsing process of opening the pouring valve before the end timing of the predetermined rinsing process for stopping the spraying of hot water is reached. Let it valve and fill the cleaning tube with the cleaning solution .
After filling the cleaning pipe with the cleaning liquid, the detergent valve was closed with the pouring valve open before the end of the rinsing process, and only hot water was supplied to the detergent mixing section to fill the cleaning pipe. bathtub cleaning apparatus is provided for by the hot water of the washing liquid Ru is transported to the vicinity of the cleaning nozzle.

According to the bathtub cleaning device, during the rinsing process, the detergent valve is opened before the end timing of the predetermined rinsing process for stopping the spraying of hot water is reached, and the cleaning liquid is filled in the cleaning tube. If the cleaning step is performed later, the cleaning liquid filled in the cleaning tube can be sprayed into the bathtub. As a result, the amount of hot water sprayed on the inner wall surface of the bathtub at the initial stage of the cleaning process can be reduced, so that the adhesiveness of the cleaning liquid can be improved.

Preferably, in the bathtub cleaning device,
When the cleaning process is executed after the rinsing process, the cleaning control means means that during the rinsing process of opening the pouring valve , the elapsed time from the start of the rinsing process is longer than the end time of the predetermined rinsing process for stopping the spraying of hot water. When the previous predetermined filling start time is reached, the detergent valve is opened,
After opening the detergent valve, when the elapsed time reaches a predetermined filling end time before the end time of the rinsing process, the detergent valve is closed with the pouring valve open.

If the internal volume of the cleaning tube is larger than the amount of cleaning liquid sprayed in the cleaning process, the detergent valve is opened in the rinsing process, and the cleaning tube is filled with the cleaning liquid before the end of the rinsing process. The cleaning tube is filled with a cleaning solution that exceeds the spray amount. As a result, not only the consumption of detergent increases, but also the amount of hot water sprayed to wash away the cleaning liquid in the rinsing process after the cleaning process increases.

However, according to the above-mentioned bath cleaning device, when the elapsed time of the rinsing process reaches a predetermined filling start time before the end time which is the end timing of the rinsing process, the detergent valve is opened and the rinsing process ends. Since the detergent valve is closed when the previous predetermined filling end time is reached, only the amount of cleaning liquid to be sprayed in the cleaning step after the rinsing step can be supplied from the detergent mixing portion to the cleaning tube.

Further, if the detergent valve is opened earlier than the end time of the rinsing process by the time when the cleaning liquid to be sprayed in the cleaning process is supplied, the internal volume of the cleaning pipe becomes larger than the spray amount of the cleaning liquid sprayed in the cleaning process. If it is large, hot water stays between the cleaning liquid in the cleaning pipe and the cleaning nozzle. As a result, at the initial stage of the cleaning process, the hot water staying in the cleaning pipe on the cleaning nozzle side of the cleaning liquid is first sprayed, which reduces the adhesiveness of the cleaning liquid.

However, according to the bathtub cleaning device, after the detergent valve is opened, the detergent valve is closed when the elapsed time reaches a predetermined filling end time before the end time of the rinsing process. Even after the valve is closed, hot water is supplied to the detergent mixing portion until the end time of the rinsing process is reached. Therefore, the cleaning liquid supplied to the cleaning pipe can be transferred to the vicinity of the cleaning nozzle by the end of the rinsing process. As a result, the amount of spraying only hot water at the initial stage of the cleaning process is further reduced, so that the adhesiveness of the cleaning liquid can be further improved.

Preferably, in the bathtub cleaning device,
When the washing step is executed after the rinsing step, the washing control means ends the predetermined rinsing step in which the spray amount of the hot water from the start of the rinsing step stops the spraying of the hot water during the rinsing step of opening the pouring valve. When the predetermined filling start amount smaller than the amount is reached, the detergent valve is opened and the valve is opened.
After opening the detergent valve, when the spray amount of hot water reaches a predetermined filling end amount smaller than the end amount of the rinsing step, the detergent valve is closed with the pouring valve open.

According to the above-mentioned bath cleaning device, when the amount of sprayed hot water during the rinsing process reaches a predetermined filling start amount smaller than the predetermined end timing of the rinsing process, the detergent valve is opened and the detergent valve is opened. After the valve is valved, the detergent valve is closed when a predetermined filling end amount smaller than the end amount of the rinsing process is reached. Can be supplied to.

Further, according to the above-mentioned bath cleaning device, after opening the detergent valve, the detergent valve is closed when the spray amount of hot water reaches a predetermined filling end amount smaller than the end amount of the rinsing step. Even after the valve is closed, hot water is supplied to the detergent mixing portion until the final amount of the rinsing process is reached. Therefore, the cleaning liquid supplied to the cleaning pipe can be transferred to the vicinity of the cleaning nozzle by the end of the rinsing process. As a result, the amount of spraying only hot water at the initial stage of the cleaning process is further reduced, so that the adhesiveness of the cleaning liquid can be further improved.

As described above, according to the present invention, in the bathtub cleaning device in which the cleaning process is executed after the rinsing process, the cleaning tube is filled with the cleaning liquid in the rinsing process, so that the amount of spraying only hot water at the initial stage of the cleaning process can be reduced. It is possible to improve the adhesion of the cleaning liquid to the inner wall surface of the bathtub. Further, it is not necessary to excessively spray the cleaning liquid in the cleaning step. Therefore, according to the present invention, it is possible to provide a bathtub cleaning device having high cleaning performance and consuming less detergent.

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 an explanatory diagram of each step in the cleaning operation of the bathtub cleaning system according to the embodiment of the present invention. FIG. 6 is a part of an explanatory diagram of each step in the cleaning operation of the bathtub cleaning system according to the embodiment of the present invention. FIG. 7 is a part of an explanatory diagram of each step in the cleaning operation of the bathtub cleaning system according to the embodiment of the present invention.

FIG. 1 is a schematic configuration diagram showing 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, and a water heater for filling, reheating, and supplying hot water, and supplying hot water to the bathtub cleaning device 4 during the washing operation. 6, a bath remote control 10a, and a cleaning remote control 10b are provided.

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, and hot water filling and additional cleaning are provided on the inner wall side surface of the bathtub 1. A circulation metal fitting (hot water filling adapter) 5 for supplying hot water for burning is provided. The drain plug 2 is configured to be opened and closed by a drain plug drive unit (not shown). The cleaning nozzle 7 may be provided separately from the bathtub 1.

The water heater 6 includes a gas burner (not shown), a hot water heat exchanger, a bath heat exchanger, and a hot water supply control circuit 8. A gas supply pipe 78 is connected to the gas burner. 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 a hot water tap 65 and a bath cleaning device 4 are connected to the hot water supply heat exchanger. There is. The bath heat exchanger is connected to an outgoing pipe 61 for supplying heated hot water to the circulation metal fitting 5 and a return pipe 62 for returning hot water from the circulation metal fitting 5. Further, in the water heater 6, the return pipe 62 is connected to a hot water filling bypass pipe branching from the hot water supply pipe 66, and the hot water filling bypass pipe is connected to a hot water pouring solenoid valve capable of blocking the supply of hot water. A hot water mixing section equipped with a hot water amount sensor for adjusting the flow rate of hot water is provided. In the present embodiment, the water heater 6 uses a gas water heater, 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, 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 prepare a 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 that supplies detergent to the detergent mixing unit 53, the detergent valve 42 that opens and closes the detergent introduction pipe 44 to adjust the supply of detergent to the detergent mixing unit 53, and the cleaning liquid generated by the detergent mixing unit 53 are washed. A cleaning pipe 43 leading to the nozzle 7, a cleaning control circuit 9, and the like are provided.

The hot water supply pipe 66 is branched into a hot water tap 65 side and a bathtub cleaning device 4 side, and the water amount control described above is performed on the upstream hot water supply pipe 66a branching to the bathtub cleaning device 4 side in order 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 volume sensor 49, a hot water pouring valve 50, a check valve 51, an air release valve 52, and the like. A Venturi-type detergent mixing section 53 is provided in the hot water supply pipe 66b on the downstream side of the backflow prevention section 48. The cleaning pipe 43 of the present embodiment has an internal volume larger than the amount of the cleaning liquid sprayed from the cleaning nozzle 7 in the cleaning step described later.

A detergent introduction pipe 44 and a cleaning pipe 43 are connected to a detergent mixing portion 53 connected to a hot water supply pipe 66b on the downstream side of the backflow prevention portion 48, and a detergent valve 42 is provided in the detergent introduction pipe 44. It is provided. Therefore, when the pouring valve 50 is opened and the hot water is supplied from the hot water supply pipe 66b on the downstream side to the detergent mixing section 53 with the detergent valve 42 opened, the hot water passes through the detergent mixing section 53. Due to the negative pressure generated during this operation, the detergent and hot water are mixed to generate a cleaning liquid, and the cleaning liquid is sprayed from the cleaning nozzle 7 through the cleaning pipe 43 to clean the bathtub 1. Further, when the pouring valve 50 is similarly opened and the hot water is supplied from the hot water supply pipe 66b on the downstream side to the detergent mixing portion 53 with the detergent valve 42 closed, only the hot water is sprayed from the cleaning nozzle 7. Then, preliminary rinsing and washing rinsing of the bathtub 1 are performed. In this way, in the case of the Venturi-type detergent mixing unit 53, since only the amount of cleaning liquid required for cleaning can be generated, there is little waste of detergent, but instead of the Venturi-type detergent mixing unit 53, the detergent introduction pipe 44 and 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. A bath remote controller 10a, a source gas solenoid valve, a proportional valve, a hot water pouring solenoid valve, a water supply sensor, a hot water amount sensor, and the like are connected to the hot water supply control circuit 8 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 hot water pouring valve 50, a drain plug drive unit, and the like.

Further, the hot water supply control circuit 8 executes 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, and a predetermined hot water supply operation and hot water filling operation as functional constituent means. It is equipped with a program for this purpose and a memory in which various setting values are stored. The cleaning control circuit 9 is abnormal based on the temperature detected by the temperature sensor 47 and the valve drive unit that adjusts the opening and closing of the detergent valve 42 and the pouring valve 50 and the opening degree of the water amount control valve 46 as functional constituent means. An abnormal temperature detection unit that detects the temperature, a timer that measures various elapsed times during the cleaning operation, a notification control unit that performs a predetermined voice notification from the cleaning remote controller 10b, a program that executes a predetermined cleaning operation, and various set values are stored. It is equipped with a washed-out memory and the like.

Next, the cleaning operation in the bathtub cleaning system of the present embodiment will be described with reference to FIGS. 2 to 7. 2 to 4 are flowcharts showing an example of a control operation in the washing operation, and FIGS. 5 to 7 are explanatory views showing a state of the washing pipe 43 in each step of the washing 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 dirtiness of the bathtub 1, the preliminary rinsing step and each waiting step may be omitted, or the number of times of executing the washing step and the washing 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 the water supply sensor (not shown) provided in the water supply pipe 63 exceeds the predetermined flow rate, and the flow rate detected by the water supply sensor becomes less than the predetermined flow rate. It is configured to perform point fire extinguishing control to extinguish the gas burner.

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

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

Although not shown, when the hot water injection 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 the water supply sensor detects a flow rate equal to or higher than a predetermined flow rate, the hot water supply control circuit 8 , The gas burner is ignited to start the hot water supply operation, and hot water of a predetermined temperature for cleaning set by the bath remote controller 10a is discharged from the hot water supply pipe 66. As a result, hot water is supplied to the hot water supply pipe 66a on the upstream side, and only hot water is sprayed from the cleaning nozzle 7 into the bathtub 1 ((a) in FIG. 5).

When the pre-rinsing step is started and the timer t1 reaches a predetermined filling start time (for example, 28 seconds) before the predetermined end time set for the pre-rinsing step, the pouring valve 50 is opened. The detergent valve 42 is opened until (steps ST5 to ST6). As a result, the detergent and hot water are supplied to the detergent mixing section 53 to generate a cleaning liquid, and the cleaning pipe 43 is started to be filled with the cleaning liquid ((b) to (c) in FIGS. 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 step elapses, and the timer t1 sets the predetermined filling end time (for example, 1 second). For example, when it reaches (29 seconds), the detergent valve 42 is closed with the pouring valve 50 open (steps ST7 to ST8). As a result, 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 rinse end time is reached, the pouring valve 50 is closed (steps ST9 to ST10). As a result, the cleaning liquid generated in the detergent mixing unit 53 is transferred to the cleaning nozzle 7 side for the transfer time of the cleaning pipe 43 ((d) in FIG. 5).

Further, when the preliminary rinsing step is completed, the timer t2 for measuring a predetermined preliminary rinsing standby time (for example, 30 seconds) is started (step ST10). As a result, the dirt adhering to the inner wall surface of the bathtub 1 is soaked before the next cleaning step, and the dirt is easily removed.

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

Further, when the cleaning step is completed, the timer t4 for measuring a predetermined cleaning standby time (for example, 50 seconds) is started in the same manner as described above (step ST14). As a result, the cleaning liquid sprayed on the bathtub 1 adheres to the dirt, and the dirt can be lifted from the inner wall surface ((f) in FIG. 6).

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

When the wash rinsing step is started and the timer t5 reaches a predetermined filling start time (for example, 28 seconds) before the set predetermined end time of the wash rinsing step, the pouring valve 50 is opened. The detergent valve 42 is opened until (steps ST17 to ST18). As a result, 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 ((h) to (i) in FIGS. 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 step elapses, and the timer t5 sets the predetermined filling end time (for example, 1 second). For example, when it reaches (29 seconds), the detergent valve 42 is closed with the pouring valve 50 open (steps ST19 to ST20). As a result, 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 cleaning rinse end time is reached, the pouring valve 50 is closed (steps ST21 to ST22). As a result, the cleaning liquid generated in the detergent mixing unit 53 is transferred to the cleaning nozzle 7 side for the transfer time of the cleaning pipe 43 ((j) in FIG. 6).

Further, when the washing / rinsing step is completed, a timer t6 for measuring a predetermined washing / rinsing standby time (for example, 20 seconds) is started (step ST22). As a result, the hot water sprayed on the inner wall surface of the bathtub 1 can be washed off before the next cleaning step.

When the timer t6 reaches the washing rinse waiting time, the washing step and the washing waiting step 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 hot water is sprayed on the bathtub 1 on which the cleaning liquid was sprayed in the previous cleaning step to wash away the cleaning liquid, and then the cleaning liquid is sprayed in the next cleaning step. Therefore, the cleaning liquid can be directly attached to the dirt of the bathtub 1 ((k) to (l) in FIG. 7). As described above, the washing step and the washing rinsing step may be further repeated, or the time in each step may be changed.

When the final cleaning step and the cleaning standby process are completed, the pouring valve 50 is opened and the timer t9 for measuring the predetermined final cleaning rinse end time (for example, 90 seconds) is started (for example, 90 seconds). Step ST28). In this final washing / rinsing step, the detergent valve 42 is held in a closed state until the final washing / rinsing end time, only hot water is supplied to the detergent mixing unit 53, and only hot water is filled in the washing pipe 43. The washing operation is completed (step ST29). As a result, the cleaning operation can be completed in a state where the cleaning pipe 43 is filled with only hot water ((m) to (n) in FIGS. 7). Therefore, 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 rinse end time, the pouring valve 50 is closed and the cleaning operation is terminated from the speaker of the cleaning remote controller 10b (steps ST30 to ST31).

As described in detail above, according to the present embodiment, in the pre-rinsing step before the cleaning step and the cleaning rinsing step when the repeated cleaning step is executed, the detergent valve is used before each rinsing step is completed. Since the valve 42 is opened, the cleaning liquid generated by the detergent mixing unit 53 can be filled in the cleaning pipe 43 between the detergent mixing unit 53 and the cleaning nozzle 7 at the end of each rinsing step. As a result, in the initial stage of the cleaning process executed after each rinsing step, the amount of spraying only the hot water sprayed from the cleaning pipe 43 is reduced, so that the adhesion of the cleaning liquid to the inner wall surface of the bathtub 1 is improved. Can be done.

Further, according to the present embodiment, when the cleaning pipe is filled with the cleaning liquid in the rinsing process, the detergent valve 42 is closed before the end of the rinsing process, so that the rinsing process is completed after the detergent valve 42 is closed. The cleaning liquid filled in the cleaning pipe 43 is transferred to the cleaning nozzle 7 side by the hot water supplied to the detergent mixing unit 53. As a result, the spraying of only hot water at the initial stage of the cleaning process can be further reduced, so that the adhesiveness of the cleaning liquid is further improved. In particular, even when the amount of the cleaning liquid sprayed in the cleaning step is smaller than the internal volume of the cleaning pipe 43, it is based on the internal volume of the cleaning pipe 43, the amount of the cleaning liquid sprayed, the amount of hot water sprayed in the rinsing step, and the rinsing time. By setting the filling start time and the filling end time, the cleaning liquid can be transferred to the vicinity of the cleaning nozzle 7.

Further, according to the present embodiment, since only the cleaning liquid corresponding to the amount of spray sprayed in each cleaning step is filled in the cleaning pipe 43, it is not necessary to excessively supply the detergent. As a result, the amount of detergent consumed can also be reduced.

Therefore, according to the present embodiment, it is possible to provide a bathtub cleaning device having high cleaning performance and low consumption of detergent.

(Other embodiments)
(1) In the above embodiment, the opening / closing of the detergent valve 42 and the closing of the pouring valve 50 in the rinsing step are both determined by the elapsed time, but these are determined by the amount of hot water sprayed detected by the water amount sensor 49. May be determined. For example, the cleaning control circuit 9 is provided with a flow rate integrating unit that calculates an integrated value of the amount of water detected by the water amount sensor 49 at predetermined time intervals, and in the rinsing process, the amount of hot water sprayed after the rinsing process is started is predetermined. When the filling start amount is reached, the detergent valve 42 is opened, the detergent valve 42 is opened, and then when the spray amount of hot water reaches a predetermined filling end amount, the detergent valve 42 is closed, and the detergent valve 42 is further opened. After closing the valve, the pouring valve 50 may be closed when the spray amount of hot water reaches a predetermined rinsing end amount which is the end timing of the rinsing step. According to this, even if the hot water supply plug 65 is opened during the rinsing process and the flow rate of the hot water supplied to the hot water supply pipe 66a changes, a certain amount of cleaning liquid is filled in the vicinity of the cleaning nozzle 7 of the cleaning pipe 43. Can be made to.
(2) In the above embodiment, the cleaning pipe 43 is filled with the cleaning liquid in both the preliminary rinsing step before the cleaning step and the cleaning rinsing step between the plurality of cleaning steps, but the cleaning is performed in one of the rinsing steps. The pipe 43 may be filled with a cleaning liquid. Further, when the cleaning step is executed three times or more in the cleaning operation, the cleaning pipe 43 may be filled with the cleaning liquid in any one of the cleaning and rinsing steps.
(3) In the above embodiment, the water supply pressure is used to supply the hot water to the washing nozzle 7, but a water receiving tank and a pump may be provided in the bathtub washing device 4 and the hot water may be supplied by the pump. ..

1 Bathtub 6 Water heater 7 Cleaning nozzle 9 Cleaning control circuit 41 Detergent tank 42 Detergent valve 43 Cleaning pipe 53 Detergent mixing part

Claims (3)

A cleaning nozzle that sprays hot water or cleaning liquid into the bathtub,
A detergent tank that stores detergent and
A detergent mixing part that mixes the detergent supplied from the detergent tank and the hot water supplied from the water heater to generate a cleaning liquid,
A hot water supply pipe that supplies hot water from the water heater to the detergent mixing section,
A pouring valve that opens and closes the hot water supply pipe,
Detergent introduction pipe that supplies detergent from the detergent tank to the detergent mixing part,
A detergent valve that opens and closes the detergent introduction pipe,
A cleaning pipe that connects the detergent mixing part and the cleaning nozzle,
A bathtub cleaning device comprising a rinsing step of spraying only hot water from a cleaning nozzle onto a bathtub and a cleaning control means for executing a cleaning step of spraying a cleaning liquid from a cleaning nozzle onto a bathtub.
The cleaning pipe has an internal volume larger than the amount of the cleaning liquid sprayed from the cleaning nozzle in the cleaning process.
When the cleaning process is performed after the rinsing process, the cleaning control means opens the detergent valve during the rinsing process of opening the pouring valve before the end timing of the predetermined rinsing process for stopping the spraying of hot water is reached. Let it valve and fill the cleaning tube with the cleaning solution .
After filling the cleaning pipe with the cleaning liquid, the detergent valve was closed with the pouring valve open before the end of the rinsing process, and only hot water was supplied to the detergent mixing section to fill the cleaning pipe. washing liquid bath cleaning apparatus Ru is transported to the vicinity of the cleaning nozzle by hot water a. In the bathtub cleaning device according to claim 1,
When the cleaning process is executed after the rinsing process, the cleaning control means means that during the rinsing process of opening the pouring valve , the elapsed time from the start of the rinsing process is longer than the end time of the predetermined rinsing process for stopping the spraying of hot water. When the previous predetermined filling start time is reached, the detergent valve and the pouring valve are opened, and the valve is opened.
A bathtub cleaning device that closes the detergent valve with the pouring valve open when the elapsed time reaches a predetermined filling end time before the end time of the rinsing process after the detergent valve is opened. In the bathtub cleaning device according to claim 1 or 2.
When the washing step is executed after the rinsing step, the washing control means ends the predetermined rinsing step in which the spray amount of the hot water from the start of the rinsing step stops the spraying of the hot water during the rinsing step of opening the pouring valve. When the predetermined filling start amount smaller than the amount is reached, the detergent valve is opened and the valve is opened.
A bathtub cleaning device that closes the detergent valve while keeping the pouring valve open when the spray amount of hot water reaches a predetermined filling end amount that is smaller than the end amount of the rinsing process after the detergent valve is opened.

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