JP7022548B2 - Bathtub cleaning device - Google Patents

Description

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

Conventionally, there is known a bathtub cleaning device that sprays cleaning water into a bathtub to wash off dirt adhering to the inner wall surface of the bathtub. In this type of bathtub cleaning device, for example, a detergent and hot water supplied from a heat source machine are mixed in a detergent mixing section to generate cleaning water, and the cleaning water is sprayed from a cleaning nozzle toward the inside of the bathtub (for example). For example, Patent Document 1).

By the way, in the bathtub cleaning device as described above, a storage container for storing hot water supplied from the heat source machine is provided, a pump is provided in the flow path on the downstream side of the storage container, and the hot water in the storage container is mixed with detergent by the pump. It is conceivable that the cleaning water is pumped to the portion and the cleaning water is ejected from the cleaning nozzle to a predetermined injection position of the bathtub.

However, during the washing operation, hot water is supplied from the storage container to the detergent nozzle via a pump, so that the inside of the pump is filled with hot water, for example, a storage container opened to the atmosphere above the washing nozzle and a storage container. When the pump is provided, when the washing operation is completed and the supply of hot water to the storage container is stopped, the hot water flows down and the inside of the pump becomes empty. Therefore, when the hot water is alternately filled and emptied in the pump due to repeated washing operations, scales such as calcium carbonate contained in the clean water are deposited in the pump, resulting in fluctuations in the pump flow rate and the pump. There is a risk of causing a failure such as sticking.

Japanese Patent Application Laid-Open No. 2003-61850

The present invention solves the above-mentioned problems, and an object of the present invention is to prevent the generation of scale in the pump even when the storage container and the pump opened to the atmosphere are arranged above the cleaning nozzle. It is an object of the present invention to provide a bathtub cleaning device capable of stable cleaning operation for a long period of time with few pump failures.

According to the present invention
A storage container open to the atmosphere that stores hot water supplied from the heat source machine,
A low water level detecting means for detecting a predetermined low water level in a storage container,
The cleaning nozzle provided in the bathtub and
A detergent tank for storing detergent and
A detergent mixing section that mixes hot water supplied from a storage container with detergent supplied from a detergent tank to generate washing water.
A hot water connecting pipe that connects the storage container and the detergent mixing part,
A cleaning pipe that supplies hot water and cleaning water from the detergent mixing section to the cleaning nozzle,
A pump installed in the hot water connecting pipe that injects and stops hot water and washing water from the washing nozzle,
An on-off valve that opens and closes the flow path of the hot and cold water connecting pipe,
It is equipped with a washing control unit that executes a washing operation to wash the bathtub by injecting hot water and washing water from the washing nozzle into the bathtub.
The storage vessel and pump are located above the wash nozzle.
Provided is a bathtub cleaning device that closes an on-off valve and ends the cleaning operation on condition that hot water is detected by the low water level detecting means.

According to the bathtub cleaning device, a low water level detecting means for detecting a predetermined low water level in the storage container and an on-off valve for opening and closing the flow path of the hot water connecting pipe are provided on the downstream side of the storage container opened to the atmosphere. Since the on-off valve is closed and the cleaning operation is terminated on condition that hot water is detected by the low water level detecting means, one end of the hot water connecting pipe is sealed and the inside of the pump provided in the hot water connecting pipe is closed. Hot water can be retained in the water.

Preferably, in the bathtub cleaning device,
If hot water is not detected by the low water level detection means during the cleaning operation in which the on- off valve is opened to drive the pump , the pump is temporarily stopped and the on-off valve is closed to interrupt the cleaning operation, and at least the low water level is low. Hot water is supplied to the storage container until hot water is detected by the detection means.

According to the bathtub cleaning device, if hot water is not detected by the low water level detecting means during the washing operation, the hot water is supplied to the storage container at least until the hot water is detected by the low water level detecting means. It is possible to surely reach the end of the washing operation while maintaining the state in which is detected.

Preferably, in the bathtub cleaning device,
The on-off valve is provided in the hot water connecting pipe on the downstream side of the pump.

According to the bathtub cleaning device, since the on-off valve is provided in the hot water connecting pipe on the downstream side of the pump, for example, the diameter of the hot water connecting pipe downstream of the on-off valve is large, and the cleaning nozzle at the downstream end is used. Even when air flows in and the hot water is easily drained, the hot water can be retained in the pump.

Preferably, the bathtub cleaning device further
Equipped with a high water level detecting means for detecting a predetermined high water level in the storage container,
If hot water is not detected by the low water level detecting means after the washing operation is completed, the hot water is supplied to the storage container until the hot water is detected by the high water level detecting means.

Even if hot water is detected by the low water level detection means, if the water level is slightly higher than the low water level detected by the low water level detection means at the end of the washing operation, so-called, so-called, until the on-off valve is closed. Due to the siphon effect, hot water may fall out in an extremely short time (for example, about 1 second).

However, according to the above-mentioned bathtub cleaning device, although hot water is detected by the low water level detecting means, hot water is not detected by the low water level detecting means after the on-off valve is closed and the washing operation is completed. Since the hot water is supplied to the storage container until the hot water is detected by the high water level detecting means, even if the hot water in the pump falls out due to the siphon effect, the hot water can be retained in the pump again.

As described above, according to the present invention, even when the storage container and the pump opened to the atmosphere are arranged above the cleaning nozzle, hot water can be reliably retained in the pump after the cleaning operation is completed. Therefore, scale is unlikely to occur in the pump. Therefore, it is possible to prevent pump failures such as fluctuations in the pump flow rate and sticking of the pump, and stable cleaning operation can be performed for a long period of time.

FIG. 1 is a schematic configuration diagram showing an example of a bathtub cleaning device according to an embodiment of the present invention. FIG. 2 is a part of a flowchart showing an example of a control operation of the bathtub cleaning device according to the embodiment of the present invention. FIG. 3 is a part of a flowchart showing an example of a control operation of the bathtub cleaning device according to the embodiment of the present invention.

Hereinafter, the bathtub cleaning device according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an example of a bathtub cleaning device according to the present embodiment. As shown in FIG. 1, a bathtub 1 is arranged along the bathroom wall in the bathroom BR, and a water heater 6 which is a heat source machine is arranged outside the bathroom BR (for example, outdoors). Although not shown, the bathtub 1 constitutes an inner peripheral wall of the bathtub constituting the water storage portion, an upper edge flange portion horizontally extending outward from the opening edge of the water storage portion to the entire circumference, and an outer surface of the bathtub 1. An apron is provided, and a bathtub space 10 is formed below the upper edge flange portion.

At the bottom of the bathtub 1, a drain plug 2 for draining bathtub water, which is hot water stored in the bathtub 1, and a washing nozzle 7 for injecting hot water or washing water are provided. Although not shown, the cleaning nozzle 7 includes an injection port that radially ejects hot water or cleaning water supplied through the cleaning pipe 43 over the entire inner peripheral surface of the water storage portion of the bathtub 1. This injection port is configured so that the injection position of the hot water or the washing water fluctuates in the upper and lower regions of the inner peripheral surface of the water storage portion according to the flow rate of the hot water or the washing water. A drainage switch 5 is provided on the upper edge flange portion of the bathtub 1, and the drainage switch 5 is connected to a drain plug controller 50 for opening and closing the drain plug 2 provided below the upper edge flange portion. Therefore, when the user operates the drainage switch 5 or the cleaning switch of the remote controller R described later, the drainage plug 2 is opened and the bathtub water in the bathtub 1 is drained.

Although not shown, the water heater 6 includes a gas burner and a hot water heat exchanger. A gas supply pipe 78 is connected to the gas burner. The hot water supply heat exchanger includes a water supply pipe 63 for supplying clean water from a water supply source, and a hot water supply pipe for supplying hot water heated from the water heater 6 to a hot water tap 65 such as a curan or a shower and a main body unit 4 described later. 66 is connected. A water heater controller 60 that controls the operation of the water heater 6 is incorporated in the water heater 6, and various sensors such as a water supply sensor provided in the water supply pipe 63 and a hot water supply temperature sensor provided in the hot water supply pipe 66, Various control valves, ignition devices, power supply boxes, and remote controllers for water heaters provided in the water supply pipe 63, the hot water supply pipe 66, and the gas supply pipe 78 are connected to the water heater controller 60. In the present embodiment, the water heater 6 has only a hot water heat exchanger, but the water heater 1 is provided with a circulation metal fitting, and the water heater 6 is provided with a hot water heat exchanger and a bath heat exchanger to provide a reheating function. You may use the water heater which has. Further, an electric water heater or a heat pump type water heater may be used.

The water supply pipe 63 and the hot water supply pipe 66 are branched into a hot water supply plug 65 side and a main body unit 4 side arranged behind the ceiling of the bathroom BR, respectively. Check valves 71 and 72 and hot water are provided in the first temperature control water supply pipe 63a and the first hot water supply pipe 66a on the upstream side of the hot water tank 47 branching from the water supply pipe 63 and the hot water supply pipe 66 to the main body unit 4, respectively. The mixing unit 80 is connected. More specifically, the hot water mixing unit 80 includes a water supply temperature sensor 81, a water amount sensor 83, a water amount adjusting valve 85, and a first hot water supply pipe 66a, which are interposed in the first temperature control water supply pipe 63a in order from the upstream side. A hot water temperature sensor 82, a hot water amount sensor 84, and a hot water amount adjusting valve 86 are provided in this order from the upstream side. Further, antifreezing heaters 73 and 74 are arranged around the pipes of the first temperature control water supply pipe 63a and the first hot water supply pipe 66a near the check valves 71 and 72, respectively. The first temperature control water supply pipe 63a and the first hot water supply pipe 66a merge on the downstream side of the water amount adjusting valve 85 and the hot water amount adjusting valve 86 to form one second hot water supply pipe 66b. A temperature sensor 75 is interposed in the second hot water supply pipe 66b.

The second hot water supply pipe 66b is connected to the hot water tank 47, which is a storage container, via a water replenishment solenoid valve (replenishment valve) 46. Further, the hot water supply pipe 66d for hot water filling is branched from the second hot water supply pipe 66b connecting the hot water mixing unit 80 and the hot water tank 47, and the hot water supply pipe 66d for hot water filling is an electromagnetic valve for hot water filling. It is connected to a stile faucet 79 located above the bathtub 1 via 90. An antifreeze heater 76 is arranged around the pipe of the hot water supply pipe 66d for hot water filling between the branch portion of the second hot water supply pipe 66b and the solenoid valve 90 for hot water filling.

Although not shown, the upper part of the hot water tank 47 is provided with a water replenishment port for discharging hot water supplied from the second hot water supply pipe 66b and an overflow port located below the water replenishment port. Further, an outlet is provided at the bottom of the hot water tank 47, and a hot water connecting pipe 66c for supplying hot water to the pump 48 is connected to the outlet. Further, an overflow pipe 68 extended in the bathtub pan in a state of being open to the atmosphere is connected to the overflow port. Therefore, the hot water tank 47 is opened to the atmosphere, and a spout space is formed between the refill port and the overflow port, and the second hot water supply pipe 66b is located downstream of the hot water tank 47 by the hot water tank 47. It is cut off from the flow path. Therefore, the hot water tank 47 functions as a backflow prevention means.

In the hot water tank 47, a high water level electrode (high water level detecting means) 471, a low water level electrode (low water level detecting means) 472, and an earth electrode 473 having different lengths for detecting the amount of stored hot water are provided. It has been inserted. The high water level electrode 471 is arranged so that the lower end of the high water level electrode 471 is located below the overflow port when hot water is stored in the hot water tank 47. The high water level electrode 471 and the low water level electrode 472 are turned on when the water level reaches a predetermined high and low water level, and are turned off when the water level does not reach a predetermined high and low water level, respectively.

A pump 48 and an on-off solenoid valve (on-off valve) 49 are interposed in the hot water connecting pipe 66c connecting the hot water tank 47 and the detergent mixing portion 51 in order from the upstream side. By driving and stopping the pump 48 and opening and closing the on-off solenoid valve 49, hot water is supplied and stopped from the hot water tank 47 to the washing water generation unit 3, whereby hot water and washing water are supplied from the washing nozzle 7. Is injected and stopped. Further, by controlling the rotation speed of the pump 48, the flow rate of hot water or washing water ejected from the washing nozzle 7 is adjusted.

Although not shown, the main body unit 4 includes a casing in which each component such as the hot water mixing section 80, the hot water tank 47, and the pump 48 described above is housed, and the vicinity of the hot water mixing section 80 in the casing is inside the casing. A low temperature sensing temperature sensor 77 for detecting the temperature is provided. Further, the water supply temperature sensor 81, the hot water temperature sensor 82, the water amount sensor 83, the hot water amount sensor 84, the water amount adjusting valve 85, the hot water amount adjusting valve 86, the antifreeze heaters 73, 74, 76, the temperature sensor 75, and the low temperature sensing are used. The temperature sensor 77, the water replenishment electromagnetic valve 46, the pump 48, the on-off electromagnetic valve 49, the hot water filling electromagnetic valve 90, and the electrodes 471, 472, 473 in the hot water tank 47 are electric with the main body unit controller 40 provided in the casing. It is connected via wiring. Further, the main body unit controller 40 is connected to the cleaning unit controller 30, the remote controller R, which will be described later, and a power supply box (not shown) via electrical wiring.

In the space 10 in the bathtub located below the upper edge flange portion of the bathtub 1, the detergent tank 41 for storing the detergent, the venturi-type detergent mixing portion 51, and the detergent tank 41 constituting the washing water generation unit 3 are used. A detergent introduction pipe 44 for guiding the detergent of the above to the detergent mixing portion 51 is arranged, and the detergent introduction pipe 44 is provided with first and second detergent valves 42a and 42b for adjusting the supply of the detergent to the detergent mixing portion 51. Is intervened. The detergent mixing portion 51 and the cleaning nozzle 7 are connected to each other via a cleaning pipe 43. Depending on the size of the bathtub space 10 and the like, the detergent tank 41, the first and second detergent valves 42a and 42b, and the detergent mixing portion 51 may be arranged apart from each other in the bathtub space 10. good.

The main body unit 4 behind the ceiling and the washing water generation unit 3 in the bathroom BR are connected by a hot water connecting pipe 66c penetrating the bathroom wall on one side of the bathtub 1. More specifically, the hot water connecting pipe 66c is connected to the opening / closing solenoid valve 49 of the main body unit 4 and the detergent mixing portion 51 of the washing water generation unit 3. Therefore, with the first and second detergent valves 42a and 42b opened, the pump 48 is driven and the on-off electromagnetic valve 49 is opened, and the hot water stored in the hot water tank 47 is used as the hot water connecting pipe 66c. When the detergent is supplied to the detergent mixing unit 51 via the detergent, the negative pressure generated when the hot water passes through the detergent mixing unit 51 mixes the detergent and the hot water to generate cleaning water, which is passed through the cleaning pipe 43 and the cleaning nozzle. Washing water is sprayed from No. 7 to wash the bathtub 1. Further, with the first and second detergent valves 42a and 42b closed, the pump 48 is similarly driven and the on-off solenoid valve 49 is opened to communicate the hot water stored in the hot water tank 47 with hot water. When supplied to the detergent mixing section 51 from the pipe 66c, only hot water is sprayed from the cleaning nozzle 7, and pre-cleaning and rinsing of the bathtub 1 are performed.

Although not shown, the washing water generation unit 3 includes a casing in which the above-mentioned detergent mixing unit 51 and the first and second detergent valves 42a and 42b are housed. Further, the cleaning unit controller 30 is incorporated in the cleaning water generation unit 3, and the electrodes of the first and second detergent valves 42a and 42b and the detergent tank 41 (not shown) described above are electrically wired to the cleaning unit controller 30. It is connected via. Further, the cleaning unit controller 30 is connected to the drain plug controller 50 and the main body unit controller 40 via electrical wiring. The detergent mixing unit 51 may use not only one that mixes the detergent and hot water by negative pressure, but also a stirring container that stirs and mixes the detergent and hot water.

A remote controller R for hot water filling operation and washing operation is arranged in the bathroom BR. The operation switch 101, the hot water filling switch 102 for performing the hot water filling operation, the washing switch 103 for performing the washing operation, the washing / hot water filling switch 104 for performing the hot water filling operation after the washing operation is completed, and the hot water filling temperature are set on the remote control R. The hot water filling temperature setting switch 105, the hot water and hot water switch 106 for starting and stopping the hot water and hot water operation, the washing course setting switch 107 for selecting the washing course, the timer switch 108, and the operating state and the set temperature are displayed. A display unit 110 or the like is provided. Although not shown, the remote controller R is connected to the main body unit controller 40 via electrical wiring, and is connected to the cleaning unit controller 30 and the drain plug controller 50 via the main body unit controller 40. Each controller is composed of a microcomputer including a CPU, ROM, and RAM.

Although not shown, the water heater controller 60 incorporates a hot water supply control circuit that controls the hot water supply operation of the water heater 6, and the main unit controller 40 has a cleaning control circuit (cleaning control unit) that controls the cleaning operation. It has been incorporated. Further, as a functional component, the cleaning control circuit includes a pump drive unit that drives the pump 48 at a predetermined rotation speed, opening / closing of the water replenishing solenoid valve 46 and the on / off solenoid valve 49, and the water amount adjusting valve 85 and the hot water amount adjusting valve 86. It includes a valve drive unit that controls the opening degree, a water level determination unit that determines the water level in the hot water tank 47 by turning on and off the high and low water level electrodes 471 and 472, and a timekeeping unit that measures the execution time in each step of the washing operation. Further, the memory of the main unit controller 40 stores a program for executing the cleaning operation and various setting values.

Next, the control operation of the washing operation in the bathtub washing device of the present embodiment will be described with reference to FIGS. 2 to 3. In the washing operation, at least a washing step of injecting washing water from the washing nozzle 7 and a rinsing step of injecting only hot water from the washing nozzle 7 are executed, but the control operation after the rinsing step which is the final step will be described below. The water heater 6 ignites a gas burner when the amount of water detected by the water supply sensor (not shown) provided in the water supply pipe 63 exceeds the predetermined amount of water, and when the amount of water detected by the water supply sensor becomes less than the predetermined amount of water. It is configured to perform point fire extinguishing control to extinguish the gas burner.

For example, when a predetermined cleaning time elapses, the cleaning process is completed, and the process shifts to the rinsing process, it is determined whether or not the high water level electrode 471 is turned on. When the high water level electrode 471 is turned on, the refilling solenoid valve 46 is opened, the on-off solenoid valve 49 is opened, and the pump 48 is driven at a predetermined rotation speed so that a predetermined flow rate can be obtained. Then, the timer td is started in order to measure the predetermined rinsing time d (for example, 90 seconds). As a result, only hot water is sprayed into the bathtub 1 from the washing nozzle 7, and the washing water adhering to the inner wall surface of the bathtub 1 sprayed in the washing step is washed away. On the other hand, when the high water level electrode 471 is off, the refilling solenoid valve 46 is opened, and hot water is supplied to the hot water tank 47 until the high water level electrode 471 is turned on. Then, when the high water level electrode 471 is turned on, the on-off solenoid valve 49 is opened and the pump 48 is driven at a predetermined rotation speed in the same manner as described above to start the timer td (steps ST1 to ST7). In the present embodiment, the solenoid valve 46 for refilling water is maintained in the open state during the rinsing process, but opening / closing control may be performed according to the capacity of the hot water tank 47.

When the low water level electrode 472 is turned off during the execution of the rinsing process, the pump 48 is temporarily stopped, the on-off solenoid valve 49 is closed and the timer td is interrupted, and the amount of hot water in the hot water tank 47 is increased. As a result, since the rinsing process can be executed in a state where hot water is always stored in the hot water tank 47, it is possible to prevent air from entering the hot water connecting pipe 66c. Then, when the high water level electrode 471 is turned on, the on-off solenoid valve 49 is opened again, the pump 48 is driven and the timer td is restarted, and hot water is injected from the cleaning nozzle 7 (steps ST8 to ST12 and ST5). ~ ST7). In the present embodiment, when the high water level electrode 471 is turned on, the on-off solenoid valve 49 is opened, but at least the low water level electrode 472 may be turned on.

When the rinsing time d elapses while the low water level electrode 472 is on, the pump 48 is stopped, the on-off solenoid valve 49 is closed, and the cleaning operation is completed (steps ST13 to ST15). That is, on condition that the low water level electrode 472 is turned on, the on-off solenoid valve 49 is closed to end the cleaning operation.

When the cleaning operation is completed as described above, it is determined again whether or not the low water level electrode 472 is turned on, and if the low water level electrode 472 is turned off, the refilling solenoid valve 46 is opened. After hot water is supplied to the hot water tank 47 until the high water level electrode 471 is turned on, the refilling solenoid valve 46 is closed (steps ST16 to ST19).

As described in detail above, according to the bathtub cleaning device, the on-off solenoid valve 49 is closed on the condition that hot water is detected by the low water level electrode 472, and the cleaning operation is terminated. At the end of the above, hot water can be retained in the pump 48 provided in the hot water connecting pipe 66c. Therefore, in the bathtub cleaning device, the hot water tank 47 and the pump 48 that are open to the atmosphere are arranged above the cleaning nozzle 7, but the hot water can be reliably retained in the pump 48. Scale is unlikely to occur in the pump 48. As a result, it is possible to prevent pump failures such as fluctuations in the pump flow rate and sticking, and stable cleaning operation can be performed for a long period of time.

Further, according to the bathtub cleaning device, when hot water is not detected in the low water level electrode 472 during the washing operation, hot water is supplied to the hot water tank 47 at least until hot water is detected in the low water level electrode 472. While maintaining the state in which hot water is detected at 472, it is possible to surely reach the end of the washing operation.

Further, according to the bathtub cleaning device, since the opening / closing solenoid valve 49 is provided in the hot water connecting pipe 66c downstream of the pump 48, for example, the diameter of the hot water connecting pipe 66c downstream of the opening / closing solenoid valve 49 is increased. Even when air flows in from the washing nozzle 7 at the downstream end and the hot water easily falls out, the hot water can be retained in the pump 48.

Further, according to the bathtub cleaning device, since it is determined whether or not hot water is detected by the low water level electrode 472 after the cleaning operation is completed, it remains in the hot water tank 47 until the on-off solenoid valve 49 is closed. It is possible to check whether a small amount of hot water has fallen off due to the siphon effect. If hot water is not detected by the low water level electrode 472 after the washing operation is completed, the hot water is supplied to the hot water tank 47 until the hot water is detected by the high water level electrode 471. Therefore, the pump 48 until the next washing operation is started. Hot water can be reliably retained inside.

When the temperature drops in winter, the hot water in the pipe tends to freeze. Therefore, when the temperature sensor 77 for detecting low temperature detects a temperature below a predetermined freezing danger temperature, the on-off electromagnetic valve 49 is opened to drain the hot water connecting pipe 66c including the inside of the pump 48. In the bathtub cleaning device, since the pump 48 and the hot water tank 47 are provided above the cleaning nozzle 7, water can be easily drained.

7 Cleaning nozzle 41 Detergent tank 43 Cleaning pipe 46 Solenoid valve for water replenishment (replenishment valve)
47 Hot water tank (storage container)
48 Pump 49 On-off solenoid valve (on-off valve)
51 Detergent mixing part 66c Hot water connecting pipe 471 High water level electrode (high water level detecting means)
472 Low water level electrode (low water level detection means)

Claims (4)

A storage container open to the atmosphere that stores hot water supplied from the heat source machine,
A low water level detecting means for detecting a predetermined low water level in a storage container,
The cleaning nozzle provided in the bathtub and
A detergent tank for storing detergent and
A detergent mixing section that mixes hot water supplied from a storage container with detergent supplied from a detergent tank to generate washing water.
A hot water connecting pipe that connects the storage container and the detergent mixing part,
A cleaning pipe that supplies hot water and cleaning water from the detergent mixing section to the cleaning nozzle,
A pump installed in the hot water connecting pipe that injects and stops hot water and washing water from the washing nozzle,
An on-off valve that opens and closes the flow path of the hot and cold water connecting pipe,
It is equipped with a washing control unit that executes a washing operation to wash the bathtub by injecting hot water and washing water from the washing nozzle into the bathtub.
The storage vessel and pump are located above the wash nozzle.
A bathtub cleaning device that closes the on-off valve and ends the cleaning operation on condition that hot water is detected by the low water level detection means. In the bathtub cleaning device according to claim 1,
If hot water is not detected by the low water level detection means during the cleaning operation in which the on- off valve is opened to drive the pump , the pump is temporarily stopped and the on-off valve is closed to interrupt the cleaning operation, and at least the low water level is low. A bathtub cleaning device that supplies hot water to the storage container until hot water is detected by the detection means. In the bathtub cleaning device according to claim 1 or 2.
The on-off valve is a bathtub cleaning device installed in the hot water connecting pipe on the downstream side of the pump. The bathtub cleaning device according to any one of claims 1 to 3 further comprises.
Equipped with a high water level detecting means for detecting a predetermined high water level in the storage container,
A bathtub cleaning device that supplies hot water to the storage container until the high water level detection means detects hot water after the washing operation is completed.

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