JP7097156B2 - 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 a cleaning liquid into a bathtub to wash off dirt adhering to the inner wall surface of the bathtub. For example, a bathtub cleaning device has been proposed in which a bathtub cleaning unit that mixes hot water and detergent supplied from a heat source machine to generate a cleaning liquid is provided in the bathroom, and hot water and cleaning liquid are sprayed from a cleaning nozzle toward the inside of the bathtub. (Patent Document 1).

However, if an on-off valve for injecting and stopping the cleaning liquid or the like from the cleaning nozzle and all the components necessary for generating the cleaning liquid are provided in a humid bathroom, a complicated waterproof structure is required. Further, in Patent Document 1, the bathtub cleaning unit is installed in a state of being exposed above the upper edge surface of the bathtub, but in consideration of the design of the bathroom and the bathtub, the bathtub cleaning unit is installed on the constituent wall of the bathtub. Installation work is difficult when arranging in a narrow space such as between the bathroom wall and the bathroom wall.

On the other hand, the applicant has installed a detergent tank and a detergent mixing section for mixing detergent and hot water in the bathroom, and a bathtub in which a flow control valve for supplying hot water from the heat source machine to the detergent mixing section is installed outside the bathroom. The cleaning device was previously proposed (Patent Document 2). According to this bathtub cleaning device, the indoor unit installed in the bathroom can be miniaturized, so that the installation work in a small space can be performed relatively easily.

However, when the flow rate control valve is installed outside the bathroom, the distance from the flow rate control valve to the detergent mixing portion varies depending on the installation location. For example, in Patent Document 2, a flow control valve is provided in the vicinity of the heat source machine, but the installation location of the heat source machine differs depending on the residence or facility. Therefore, the length of the pipe connecting the indoor unit and the outdoor unit differs depending on the environment in which the flow control valve is installed. As a result, even if the same indoor unit and outdoor unit are used, the flow rate of hot water may fluctuate and the cleaning performance may vary, and the desired cleaning effect may not be obtained. In order to suppress fluctuations in the flow rate of hot water due to such differences in pipe length, it is conceivable to provide hot water supply means having an excessive hot water supply capacity so as to be able to handle both long and short pipes, but the cost increases. ..

Japanese Unexamined Patent Publication No. 2001-61694 Japanese Unexamined Patent Publication No. 2009-268576

The present invention solves the above problems, and an object of the present invention is that the installation work is easy regardless of the installation location, the degree of freedom in the design of the bathroom and the bathtub is high, and stable cleaning performance can be obtained. The purpose is to provide a bathtub cleaning device that is low in cost, energy saving, and has excellent maintainability.

According to the present invention
A detergent tank provided in the bathroom, a detergent tank for storing detergent, and a cleaning liquid generation unit having a detergent mixing unit for mixing detergent supplied from the detergent tank and hot water supplied from a heat source machine to generate a cleaning liquid.
A cleaning pipe that supplies the cleaning liquid to the cleaning nozzle that sprays the cleaning liquid from the cleaning liquid generation unit toward the inside of the bathtub.
A main unit that is provided behind the ceiling of the bathroom and has a cleaning liquid injection unit that injects and stops the cleaning liquid from the cleaning nozzle, and a flow rate adjusting unit that adjusts the flow rate of the cleaning liquid that is injected from the cleaning nozzle.
It is equipped with a hot water pipe that supplies hot water from the main unit installed behind the ceiling of the bathroom to the cleaning liquid generation unit installed in the bathroom.
The main unit is a hot water storage unit that stores hot water, and a pump that is arranged on the downstream side of the hot water storage unit to inject and stop the cleaning liquid from the cleaning nozzle and adjust the flow rate of the cleaning liquid ejected from the cleaning nozzle. Have,
The hot water storage section has a refill port to which the hot water supply pipe on the upstream side that supplies hot water to the hot water storage section is connected, an overflow port to which the overflow pipe is connected below the refill port, and an overflow port. Also below, it has a hot water supply pipe on the downstream side that supplies hot water to the pump from the hot water storage unit, and cuts off the hot water supply pipe on the upstream side and the hot water supply pipe on the downstream side between the refill port and the overflow port. Provided is a bathtub cleaning device that has a spout space and functions as a backflow prevention unit that prevents backflow of the cleaning liquid to the replenishment port side by draining from the overflow pipe .

According to the bathtub cleaning device, the cleaning liquid generation unit having a detergent tank or the like is installed in the bathroom, and the main body unit having the cleaning liquid injection unit or the like is installed behind the ceiling of the bathroom. The cleaning liquid generation unit can be easily installed. In addition, the main unit can be installed behind the ceiling of the bathroom according to the construction work of the bathroom. As a result, workability in installation work can be significantly improved. Further, since only the cleaning liquid generation unit is installed in the bathroom, it is not necessary to secure a large installation space. This makes it possible to design bathtubs and bathrooms with a high degree of freedom.

Further, according to the bathtub cleaning device, the cleaning liquid generation unit is installed in the bathroom and the main body unit is installed behind the ceiling of the same bathroom. Therefore, even if the installation location is different, the cleaning liquid generation unit and the main body unit are installed. There is no big difference in the distance between them, and hot water pipes of almost the same length can be used. Further, since the cleaning liquid generation unit is installed in the bathroom, the distance between the cleaning liquid generation unit and the cleaning nozzle is substantially fixed regardless of the installation location, and cleaning pipes having substantially the same length can be used. Therefore, even if the installation location is different, the fluctuation of the flow rate of hot water due to the pipe length is small, and the cleaning liquid can be sprayed into the bathtub at the desired flow rate. This makes it possible to reduce variations in cleaning performance depending on the installation location.

Further, according to the above-mentioned bathtub cleaning device, since the cleaning liquid generation unit is installed in the bathroom and the main body unit is installed behind the ceiling of the bathroom, a head approximately equal to the height of the bathroom is located between the main body unit and the cleaning nozzle. It can make a difference. Therefore, hot water can be supplied from the main body unit to the cleaning nozzle by utilizing a large head pressure. Therefore , when the cleaning liquid is injected from the cleaning nozzle by the pump , it is not necessary to use a pump having a large hot water supply capacity, and the pump can be operated with a low driving force during the cleaning operation. As a result, not only the cost of the bathtub cleaning device itself can be reduced, but also the cleaning operation can be performed with low energy.

Further, according to the above-mentioned bathtub cleaning device, since the cleaning liquid generation unit is installed in the bathroom and the main body unit is installed behind the ceiling of the bathroom, the main body unit and the cleaning liquid generation unit are connected to each other by the head difference in the hot water pipe. The residual water can be drained smoothly. Further, since the main body unit is installed behind the ceiling in the dry area rather than in the bathroom, a heating means such as an electric heater can be provided. As a result, maintainability for avoiding freezing can be improved in winter.
Further, according to the bathtub cleaning device, since the main body unit has a hot water storage unit for storing hot water, a larger head pressure can be used. As a result, a low-cost pump having a lower hot water supply capacity can be used, and a cleaning operation can be performed with lower energy.
Further, according to the bathtub cleaning device, since the hot water storage unit has a spout space for cutting off the hot water supply pipe on the upstream side and the hot water supply pipe on the downstream side, the tap water pressure of the clean water and the upstream side Even if the flow rate supplied from the heat source machine of No. 1 fluctuates, it is possible to prevent the fluctuation of the flow rate of hot water by the pump arranged on the downstream side. As a result, hot water can be more stably supplied from the main body unit to the cleaning liquid generation unit.

Preferably, in the bathtub cleaning device,
The cleaning liquid generation unit is provided in the space inside the bathtub formed below the upper edge flange portion of the bathtub.

According to the bathtub cleaning device, since the bathtub and the cleaning liquid generation unit can be brought close to each other, it is possible to further suppress the fluctuation of the flow rate of the cleaning liquid due to the pipe length of the cleaning pipe from the cleaning liquid generation unit to the cleaning nozzle. This makes it possible to further reduce variations in cleaning performance depending on the installation location.

As described above, according to the present invention, it is possible to provide a bathtub cleaning device that can be easily installed regardless of the installation location, has a high degree of freedom in designing a bathroom and a bathtub, and can obtain stable cleaning performance. .. Further, according to the present invention, it is possible to provide a bathtub cleaning device suitable for energy saving at low cost. Further, according to the present invention, it is possible to provide a bathtub cleaning device having excellent maintainability for avoiding freezing.

FIG. 1 is a schematic configuration diagram showing a bathtub cleaning device according to the first embodiment of the present invention. FIG. 2 is a schematic configuration diagram showing a bathtub cleaning device according to the second embodiment of the present invention.

(Embodiment 1)
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 a bathtub cleaning device according to the present embodiment. As shown in FIG. 1, a bathtub 1 is arranged in the bathroom BR along the bathroom wall, 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 extending horizontally 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 and a cleaning nozzle 7 for spraying hot water or a cleaning liquid are provided. Although not shown, the cleaning nozzle 7 includes an injection port that radially ejects hot water or cleaning liquid 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 cleaning liquid 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 cleaning liquid. The cleaning nozzle 7 may be provided separately from the bathtub 1. 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 tap 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 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 on the back surface of the ceiling wall of the bathroom BR, respectively. The check valves 71 and 72 and the hot water mixing section 80 are provided in the first temperature control water supply pipe 63a and the first hot water supply pipe 66a on the upstream side branching from the water supply pipe 63 and the hot water supply pipe 66 to the main body unit 4, respectively. It is connected. More specifically, the hot water mixing unit 80 includes a water supply temperature sensor 81, a water volume sensor 83, and a water volume adjusting valve 85, which are interposed in the first temperature control water supply pipe 63a on the upstream side in order from the upstream side, and the upstream side. The first hot water supply pipe 66a is provided with a hot water temperature sensor 82, a hot water amount sensor 84, and a hot water amount adjusting valve 86, which are sequentially interposed 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 on the upstream side near the check valves 71 and 72, respectively. The first temperature control water supply pipe 63a and the first hot water supply pipe 66a on the upstream side merge on the downstream side of the water amount adjusting valve 85 and the hot water amount adjusting valve 86 to form one upstream second hot water supply pipe 66b. ing. A temperature sensor 75 is interposed in the second hot water supply pipe 66b on the upstream side.

The second hot water supply pipe 66b on the upstream side is connected to the hot water tank 47, which is a hot water storage portion, via a solenoid valve 46 for refilling water. Further, the hot water supply pipe 66d for hot water filling is branched from the second hot water supply pipe 66b on the upstream side 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 filled with hot water. It is connected to a stile faucet 79 located above the bathtub 1 via a solenoid valve 90. An anti-freezing 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 on the upstream side 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 on the upstream side 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 third hot water supply pipe 66c on the downstream side for supplying hot water to the pump 48 is connected to the outlet. Further, an overflow pipe 68 extending in the bathtub pan is connected to the overflow port. Therefore, a spout space is formed between the refill port and the overflow port, and the second hot water supply pipe 66b on the upstream side and the third hot water supply pipe 66c on the downstream side are separated by the hot water tank 47. Therefore, the hot water tank 47 also functions as a backflow prevention unit.

A pump 48 and a downstream solenoid valve 49 are interposed in the third hot water supply pipe 66c on the downstream side in order from the upstream side. By driving and stopping the pump 48 and opening and closing the downstream solenoid valve 49, hot water is supplied and stopped from the hot water tank 47 to the cleaning liquid generation unit 3, whereby hot water and cleaning liquid are supplied from the cleaning nozzle 7. Injection and stop are performed. Further, by controlling the rotation speed of the pump 48, the flow rates of the hot water and the cleaning liquid jetted from the cleaning nozzle 7 are adjusted. Therefore, in the present embodiment, the pump 48 functions as a cleaning liquid injection unit and a flow rate adjusting unit that inject and stop the cleaning liquid from the cleaning nozzle 7 and adjust the flow rate of the cleaning liquid injected from the cleaning nozzle 7.

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 solenoid valve 46, the pump 48, the downstream solenoid valve 49, the hot water filling solenoid valve 90, and the electrodes in the hot water tank 47 are connected to the main body unit controller 40 provided in the casing via electrical wiring. It is connected. Further, the main body unit controller 40 is connected to a cleaning unit controller 30, a 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 cleaning liquid generation unit 3 are provided. A detergent introduction pipe 44 for guiding the detergent to the detergent mixing unit 51 is arranged, and the detergent introduction pipe 44 has first and second detergent valves 42a and 42b for adjusting the supply of the detergent to the detergent mixing unit 51. It is installed. 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 cleaning liquid generation unit 3 in the bathroom BR are connected by a hot water pipe 67 penetrating the bathroom wall on one side of the bathtub 1. More specifically, the upstream end of the hot water pipe 67 is connected to the downstream solenoid valve 49 of the main body unit 4, and the downstream end is connected to the detergent mixing portion 51 of the cleaning liquid generation unit 3. Therefore, with the first and second detergent valves 42a and 42b opened, the pump 48 is driven and the downstream electromagnetic valve 49 is opened, and the hot water stored in the hot water tank 47 is discharged to the hot water pipe 67. 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 a cleaning liquid, and passes through the cleaning pipe 43 to the cleaning nozzle 7. The cleaning liquid is sprayed from the bath 1 to clean the bath 1. Further, with the first and second detergent valves 42a and 42b closed, the pump 48 is similarly driven, and the downstream solenoid valve 49 is opened to use the hot water stored in the hot water tank 47 as hot water. When the water pipe 67 supplies the detergent to the detergent mixing unit 51, only hot water is sprayed from the cleaning nozzle 7 to perform pre-cleaning and rinsing of the bathtub 1.

Although not shown, the cleaning liquid 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 liquid 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 have electrical wiring with 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.

A remote controller R for hot water filling operation and washing operation is arranged in the bathroom BR. The remote controller R has an operation switch 101, a hot water filling switch 102 for hot water filling operation, a washing switch 103 for washing operation, a washing / hot water filling switch 104 for hot water filling operation after the washing operation, and hot water for setting the hot water filling temperature. The tension 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 and the like are 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 equipped with a CPU, ROM, and RAM, and operates a drain plug 2, a cleaning liquid generation unit 3, a main body unit 4, and a water heater 6 according to a stored control program, and fills with hot water. Operation, washing operation, etc. are executed.

Next, the cleaning operation will be described. 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, after using the bathtub 1, when the user turns on the cleaning switch 103 while the operation switch of the remote controller for the water heater is turned on and the operation switch 101 of the remote controller R is turned on, the standard mode program is used. Is activated, the drain plug 2 is opened by the drain plug controller 50, and the bathtub water in the bathtub 1 is drained. When a predetermined drainage time has elapsed since the drain plug 2 was opened, the main body unit controller 40 opens the refilling solenoid valve 46 so that hot water is supplied from the hot water mixing unit 80 only to the main body unit 4 side. .. Then, tap water pressure supplies tap water from the water supply pipe 63 to the water heater 6, and when a water supply sensor (not shown) detects a water amount exceeding a predetermined amount, the water heater controller 60 ignites the gas burner to perform hot water supply operation. Let's get started. When the hot water supply operation is started, the opening degrees of the water amount adjusting valve 85 and the hot water amount adjusting valve 86 are adjusted in the hot water mixing unit 80 so that the temperature of the hot water detected by the temperature sensor 75 becomes a predetermined temperature, and the opening of the water amount adjusting valve 86 is adjusted to the upstream side. Hot water adjusted to a predetermined temperature is supplied to the hot water tank 47 via the water supply pipe 63a for temperature control and the first and second hot water supply pipes 66a and 66b.

Next, when it is detected by the electrode in the hot water tank 47 that hot water has been stored up to a predetermined water level, the refilling solenoid valve 46 is closed and the downstream solenoid valve 49 is opened for predetermined preliminary cleaning. The pump 48 is driven at a rotation rate at which the flow rate of the above can be obtained, and hot water is supplied from the main body unit 4 installed behind the ceiling of the bathroom BR to the cleaning liquid generation unit 3 in the bathroom BR. As a result, the preliminary cleaning step of injecting only hot water from the cleaning nozzle 7 into the bathtub 1 is executed.

When the predetermined pre-cleaning time has elapsed, the pump 48 is stopped and the downstream solenoid valve 49 is closed. Then, when the predetermined pre-cleaning standby time elapses, the pump 48 is driven at a rotation speed at which a predetermined cleaning flow rate can be obtained, and the downstream solenoid valve 49 and the first and second detergent valves 42a and 42b are opened. Let me. As a result, the detergent and hot water are supplied to the detergent mixing unit 51 to generate a cleaning liquid, and the cleaning step of injecting the cleaning liquid from the cleaning nozzle 7 into the bathtub 1 is executed.

When the predetermined cleaning time elapses, the pump 48 is stopped and the downstream solenoid valve 49 and the first and second detergent valves 42a and 42b are closed. Then, when the predetermined cleaning standby time elapses, the pump 48 is driven at a rotation speed at which a predetermined flow rate for rinsing is obtained, and the downstream solenoid valve 49 is opened. As a result, the rinsing process is performed in the same manner as the pre-cleaning. The cleaning and rinsing steps may be executed a plurality of times, respectively, or only the cleaning and rinsing steps may be executed without performing the preliminary cleaning.

After a predetermined rinsing time has elapsed, the downstream solenoid valve 49 is opened for a predetermined time, the hot water in the hot water tank 47 and the hot water pipe 67 is drained into the bathtub 1, and then the downstream solenoid valve 49 is closed. At the same time, the pump 48 is stopped to end the cleaning operation. If the possibility of freezing is low, the washing operation may be terminated without draining the hot water in the hot water tank 47 and the hot water pipe 67.

According to the bathtub cleaning device, the main body unit 4 has a hot water tank 47 for storing hot water, various control valves such as a pump 48 for injecting and stopping the cleaning liquid, a downstream electromagnetic valve 49, and various sensors such as a temperature sensor 75. Is installed behind the ceiling of the bathroom BR, and only the cleaning liquid generation unit 3 having the detergent tank 41 and the like is installed in the bathroom BR. Therefore, the cleaning liquid generation unit 3 can be easily installed even in a relatively narrow bathtub space 10. Can be installed. Further, the main body unit 4 can be installed behind the ceiling of the bathroom BR in accordance with the construction work of the bathroom BR. As a result, workability can be significantly improved as compared with the case where all the components of the bathtub cleaning device are installed in the bathroom BR. Further, since the bathtub space 10 can be made smaller than the case where the main body unit 4 is provided in the bathtub space 10, the bathroom BR and the bathtub 1 can be designed with a high degree of freedom.

Further, according to the bathtub cleaning device, since the cleaning liquid generation unit 3 is installed in the bathroom BR and the main body unit 4 is installed behind the ceiling of the same bathroom BR, there are houses and facilities where the bathtub cleaning device is installed. Even if they are different, there is no big difference in the distance between the cleaning liquid generation unit 3 and the main body unit 4, and hot water pipes 67 having substantially the same length can be used. Further, since the cleaning liquid generation unit 3 is installed in the bathtub space 10 in the bathroom BR, the distance between the detergent mixing unit 51 and the cleaning nozzle 7 is substantially fixed regardless of the installation location, and has substantially the same length. Cleaning pipe 43 can be used. Further, according to the bathtub cleaning device, even if the installation location is different, the hot water stored in the hot water tank 47 by the pump 48 is supplied to the detergent mixing unit 51 via the hot water pipe 67 having substantially the same length. Further, the cleaning liquid is sprayed into the bathtub 1 from the cleaning nozzle 7 via the cleaning pipe 43 having substantially the same length. That is, the hot water supply passages in which the pump 48 supplies hot water from the hot water tank 47 to the washing nozzle 7 are formed to have substantially the same length regardless of the installation location. Moreover, since the second hot water supply pipe 66b on the upstream side and the third hot water supply pipe 66c on the downstream side are cut off by the hot water tank 47 having a spout space, tap water for clean water supplied to the water heater 6 is cut off. Even if the pressure fluctuates or the flow rate of the hot water supplied from the water heater 6 to the hot water tank 47 fluctuates, the flow rate of the hot water discharged by the pump 48 does not fluctuate. Therefore, even if the water heater 6 is installed at a place away from the bathroom BR, the variation in the flow rate of the cleaning liquid is small, so that the variation in the cleaning performance depending on the installation location can be reduced.

Further, according to the bathtub cleaning device, since the cleaning liquid generation unit 3 is installed in the bathroom BR and the main body unit 4 is installed behind the ceiling of the bathroom BR, it is omitted between the main body unit 4 and the cleaning nozzle 7. A head difference of the height of the bathroom (for example, about 2 m) can be generated. Therefore, hot water can be supplied from the pump 48 to the cleaning nozzle 7 by utilizing the large head pressure. Therefore, a pump 48 having a low hot water supply capacity can be used. Moreover, as described above, even if the installation location is different, the hot water pipe 67 and the cleaning pipe 43 can be used with substantially the same length, so a pump having an excessive hot water supply capacity is used assuming the length of the pipe. You don't even have to. Further, the pump 48 can be operated with a low driving force during the cleaning operation. As a result, not only the cost of the bathtub cleaning device itself can be reduced, but also the cleaning operation can be performed with low energy.

Further, according to the bathtub cleaning device, since the cleaning liquid generation unit 3 is installed in the bathroom BR and the main body unit 4 is installed behind the ceiling of the bathroom BR, the residual water in the hot water pipe 67 is smoothly smoothed by the head difference. Can be drained. Further, since the main body unit 4 is installed behind the ceiling in the dry area rather than in the bathroom BR, heating means such as anti-freezing heaters 73, 74, 76 can be provided. This makes it possible to improve maintainability for avoiding freezing in winter.

Therefore, the bathtub cleaning device of the present embodiment can be easily installed regardless of the installation location, has a high degree of freedom in designing the bathroom BR and the bathtub 1, and can obtain stable cleaning performance. Further, the bathtub cleaning device of the present embodiment is low in cost, is suitable for energy saving, and is also excellent in maintainability for avoiding freezing.

(Embodiment 2)
The bathtub cleaning device according to the present embodiment does not have the hot water tank 47, the pump 48, and the downstream electromagnetic valve 49 provided in the main body unit 4 of the first embodiment, and does not have the upstream second hot water. The supply pipe 66b is provided with an on-off valve 55 as a cleaning liquid injection unit for injecting and stopping the cleaning liquid from the cleaning nozzle 7, and is provided in the first temperature control water supply pipe 63a and the first hot water supply pipe 66a on the upstream side, respectively. The provided water amount adjusting valve 85 and hot water amount adjusting valve 86 function as a flow rate adjusting unit for adjusting the flow rate of the cleaning liquid. Other than these, the basic configuration is substantially the same as that of the first embodiment. Therefore, for the same configuration as that of the first embodiment, the same reference number will be used and the description thereof will be omitted.

FIG. 2 is a schematic configuration diagram of a bathtub cleaning device according to the present embodiment. As shown in FIG. 2, an on-off valve 55, a check valve 56, and an atmospheric release valve 57 are interposed on the downstream side of the hot and cold water mixing section 80. Therefore, in the present embodiment, the check valve 56 and the atmosphere release valve 57 function as a check valve. Further, the third hot water supply pipe 66c on the downstream side is provided with a switching solenoid valve 91 for switching the flow path between the stile faucet 79 side and the cleaning liquid generation unit 3 side. More specifically, the switching solenoid valve 91 is composed of a three-way valve, the third hot water supply pipe 66c on the downstream side is connected to the input side, and the hot water pipe 67 and the hot water connected to the stile faucet 79 are connected to the output side. It is connected to the hot water supply pipe 66d for tensioning.

In the cleaning operation of the bathtub cleaning device of the present embodiment, as in the first embodiment, when the cleaning switch 103 is turned on by the remote controller R, the drain plug 2 is opened by the drain plug controller 50, and the drain plug 2 is opened. When a predetermined drainage time has elapsed since the cap was opened, the main body unit controller 40 opens the on-off valve 55, and the flow of the switching electromagnetic valve 91 so that hot water is supplied only to the cleaning liquid generation unit 3 side. Switch the road. Then, tap water pressure supplies tap water from the water supply pipe 63 to the water heater 6, and when a water supply sensor (not shown) detects a water amount exceeding a predetermined amount, the water heater controller 60 ignites the gas burner to perform hot water supply operation. Let's get started. When the hot water supply operation is started, the opening degrees of the water amount adjusting valve 85 and the hot water amount adjusting valve 86 are adjusted so that the flow rate and temperature of the predetermined hot water for preliminary cleaning can be obtained. Subsequent operations are the same as those in the first embodiment, and in the cleaning step and the rinsing step, the opening / closing of the on-off valve 55 and the opening / closing of the water amount adjusting valve 85 and the hot water amount adjusting valve 86 are adjusted.

According to the bathtub cleaning device, as in the first embodiment, only the cleaning liquid generation unit 3 is installed in the bathroom BR, and the main body unit 4 is installed behind the ceiling of the bathroom BR. Therefore, these units 3 and 3. 4 can be easily installed, and the bathroom BR and the bathtub 1 can be designed with a high degree of freedom.

Further, according to the bathtub cleaning device, as in the first embodiment, the hot water pipe 67 and the cleaning pipe 43 having substantially the same length can be used regardless of the installation location. Therefore, it is possible to reduce variations in cleaning performance depending on the installation location.

Further, according to the bathtub cleaning device, hot water can be supplied from the main body unit 4 to the cleaning nozzle 7 by utilizing the head difference as in the first embodiment. Therefore, it is possible to inject a sufficient flow rate of hot water or cleaning liquid into the bathtub 1 only by the tap water pressure of the clean water. As a result, not only the cost of the bathtub cleaning device itself can be further reduced, but also the cleaning operation can be performed with lower energy.

Further, according to the bathtub cleaning device, the residual water in the hot water pipe 67 can be smoothly drained due to the head difference, as in the first embodiment. Further, the main body unit 4 installed in the dry area may be provided with heating means such as anti-freezing heaters 73, 74, 76. Therefore, in winter, maintainability for avoiding freezing can be improved.

Therefore, the bathtub cleaning device of the present embodiment also has a high degree of freedom in designing the bathroom BR and the bathtub 1 regardless of the installation location, and stable cleaning performance can be obtained, as in the first embodiment. Further, the bathtub cleaning device of the present embodiment is low in cost, is suitable for energy saving, and is also excellent in maintainability for avoiding freezing.

In each of the above embodiments, a bathtub cleaning device provided with a hot water supply pipe 66d for hot water filling is used, but it is a bathtub cleaning device that does not provide a hot water supply pipe 66d for hot water filling and only performs a washing operation. There may be.

1 Bathtub 2 Drain plug 3 Cleaning liquid generation unit 4 Main unit 7 Cleaning nozzle 10 Bathtub space 41 Detergent tank 43 Cleaning pipe 47 Hot water tank (hot water storage)
48 Pump 51 Detergent mixing part 55 On-off valve 67 Hot water pipe 85 Water volume adjustment valve 86 Hot water volume adjustment valve BR Bathroom

Claims (2)

A detergent tank provided in the bathroom, a detergent tank for storing detergent, and a cleaning liquid generation unit having a detergent mixing unit for mixing detergent supplied from the detergent tank and hot water supplied from a heat source machine to generate a cleaning liquid.
A cleaning pipe that supplies the cleaning liquid to the cleaning nozzle that sprays the cleaning liquid from the cleaning liquid generation unit toward the inside of the bathtub.
A main unit that is provided behind the ceiling of the bathroom and has a cleaning liquid injection unit that injects and stops the cleaning liquid from the cleaning nozzle, and a flow rate adjusting unit that adjusts the flow rate of the cleaning liquid that is injected from the cleaning nozzle.
It is equipped with a hot water pipe that supplies hot water from the main unit installed behind the ceiling of the bathroom to the cleaning liquid generation unit installed in the bathroom.
The main unit is a hot water storage unit that stores hot water, and a pump that is arranged on the downstream side of the hot water storage unit to inject and stop the cleaning liquid from the cleaning nozzle and adjust the flow rate of the cleaning liquid ejected from the cleaning nozzle. Have,
The hot water storage section has a refill port to which the hot water supply pipe on the upstream side that supplies hot water to the hot water storage section is connected, an overflow port to which the overflow pipe is connected below the refill port, and an overflow port. Also below, there is an outlet to which the hot water supply pipe on the downstream side that supplies hot water to the pump from the hot water storage unit is connected, and the hot water supply pipe on the upstream side and the downstream side between the refill port and the overflow port. A bathtub cleaning device that has a spout space that cuts off the edge of the hot water supply pipe and functions as a backflow prevention unit that prevents backflow of the cleaning liquid to the replenishment port side by draining from the overflow pipe . In the bathtub cleaning device according to claim 1,
The cleaning liquid generation unit is a bathtub cleaning device provided in the space inside the bathtub formed below the upper edge flange of the bathtub.

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