JP7010682B2 - 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.

In order to obtain a high cleaning effect in the bathtub cleaning device as described above, it is necessary to inject cleaning water at a predetermined injection position. Therefore, it is necessary to adjust the flow rate for injecting the washing water from the washing nozzle toward the inside of the bathtub so as to be a predetermined flow rate.

On the other hand, 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 to pump the water to the unit and inject the washing water from the washing nozzle. In order to inject the washing water into the predetermined injection position of the bathtub by such a configuration, it is conceivable to drive the pump at a preset rotation speed so as to have a predetermined set flow rate, but the pump performance varies. There is a problem that a predetermined set flow rate corresponding to the number of revolutions cannot be obtained due to deterioration over time, the injection position of the cleaning water deviates from the predetermined position, and sufficient cleaning performance cannot be obtained.

It is also conceivable to install a flow rate sensor in the flow path downstream of the storage container and control the rotation speed of the pump based on the flow rate detected by the flow rate sensor, but the detergent flows back from the detergent mixing section to the upstream side. Or, especially when an open storage container is used, foreign substances such as algae and dirt may get mixed in the hot water. As a result, foreign matter or detergent may clog the mechanical part of the flow sensor.

Japanese Patent Application Laid-Open No. 2003-61850 Japanese Unexamined Patent Publication No. 2013-9854

The present invention solves the above-mentioned problems, and an object of the present invention is to control the rotation speed of a pump in a bathtub cleaning device including a storage container for storing hot water and a pump for pumping hot water in the storage container. The purpose is to exert a high cleaning effect without using a flow sensor for the purpose.

According to the present invention
A storage container for storing hot water supplied from the heat source machine,
A first water level detecting means for detecting a predetermined first water level in a storage container, and
A second water level detecting means for detecting a predetermined second water level lower than the first water level in the storage container, 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 supplies hot water from the storage container to the detergent mixing section,
Detergent introduction pipe that supplies detergent from the detergent tank to the detergent mixing part,
A cleaning nozzle that sprays cleaning water into the bathtub,
A cleaning pipe that supplies cleaning water from the detergent mixing section to the cleaning nozzle,
A pump installed in the hot water connecting pipe that injects and stops the washing water from the washing nozzle,
A cleaning operation control means for controlling the cleaning operation of cleaning the bathtub by injecting cleaning water into the bathtub from the cleaning nozzle,
A calculation means for calculating the flow rate ejected from the cleaning nozzle based on the outflow time from the first water level to the second water level when the pump is rotated at a predetermined rotation speed.
The flow rate calculated by the calculation means is compared with the predetermined set flow rate, and the predetermined set flow rate is based on the data table including the deviation of the calculated flow rate with respect to the predetermined set flow rate and the correction value of the corresponding pump rotation rate. Provided is a bathtub cleaning device including a flow rate compensating means for correcting the rotation rate of the pump in the cleaning operation so as to obtain the above .

The bathtub cleaning device is provided in a storage container for storing hot water supplied from a heat source machine, a hot water connecting pipe for supplying hot water from the storage container to the detergent mixing portion, and a hot water connecting pipe for cleaning from a cleaning nozzle. Since it has a pump for injecting and stopping water, the hot water stored in the storage container can be pressure-fed to the detergent mixing portion by the pump, and the washing water can be jetted from the washing nozzle.

Further, the bathtub cleaning device includes a first water level detecting means for detecting a predetermined first water level in the storage container and a second water level detecting means for detecting a predetermined second water level lower than the first water level in the storage container. Therefore, the flow rate injected from the cleaning nozzle can be calculated based on the outflow time from the first water level to the second water level when the pump is rotated at a predetermined rotation speed.

Then, according to the bath cleaning device, the calculated flow rate is compared with the predetermined set flow rate, and a data table including the deviation of the calculated flow rate with respect to the predetermined set flow rate and the correction value of the corresponding pump rotation rate is included. Since the pump rotation rate in the cleaning operation is corrected so that a predetermined set flow rate can be obtained based on the above, even if the flow rate injected from the cleaning nozzle deviates from the predetermined set flow rate due to variations in pump performance or deterioration over time. The pump can be driven to obtain a predetermined set flow rate.

Preferably, in the bathtub cleaning device,
The calculation means rotates the pump at a predetermined rotation speed at the start of the cleaning operation, and calculates the flow rate injected from the cleaning nozzle based on the outflow time from the first water level to the second water level.

According to the above-mentioned bathtub cleaning device, the flow rate ejected from the cleaning nozzle is calculated based on the outflow time from the first water level to the second water level when the pump is rotated at a predetermined rotation speed at the start of the cleaning operation. Even if the calculated flow rate deviates from the predetermined set flow rate, the pump can be driven by the flow rate compensating means so that the predetermined set flow rate can be obtained in the subsequent cleaning operation.

Preferably, in the bathtub cleaning device,
The calculation means rotates the pump at a predetermined rotation speed at the end of the cleaning operation, and calculates the flow rate injected from the cleaning nozzle based on the outflow time from the first water level to the second water level.

According to the above-mentioned bathtub cleaning device, the flow rate ejected from the cleaning nozzle is calculated based on the outflow time from the first water level to the second water level when the pump is rotated at a predetermined rotation speed at the end of the cleaning operation. When the calculated flow rate deviates from the predetermined set flow rate, the pump can be driven by the flow rate compensating means so that the predetermined set flow rate can be obtained in the next cleaning operation. Further, when the rotation speed of the pump is corrected at the start of the cleaning operation, it can be confirmed at the end of the cleaning operation whether or not a predetermined set flow rate is obtained at the corrected rotation speed.

Preferably, in the bathtub cleaning device,
The cleaning operation control means corrects the rotation speed of the pump based on the correction of the rotation speed of the pump at the end of the previous cleaning operation, and starts the cleaning operation.

According to the bathtub cleaning device, when the rotation rate of the pump is corrected at the end of the previous cleaning operation, the cleaning operation is started using the correction result, so that it is calculated at the start of the previous cleaning operation. Even if the flow rate deviates significantly from the predetermined set flow rate or the flow rate fluctuates during the previous cleaning operation, the cleaning operation can be started from a state in which the deviation from the predetermined set flow rate is smaller.

As described above, according to the present invention, even if the flow rate injected from the cleaning nozzle deviates from a predetermined set flow rate due to variations in pump performance or deterioration over time, the actual flow rate is calculated without using a flow rate sensor. Since the rotation rate of the pump is corrected, the washing water can be stably injected at a predetermined injection position. Thereby, it is possible to provide a bathtub cleaning device having a high cleaning effect at a low cost.

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 data table for correcting the rotation speed of the pump in 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. FIG. 4 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. 5 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. 6 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. 7 is a part of a flowchart showing an example of the 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 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 is cut off from the flow path on the downstream side of the hot water tank 47 by the hot water tank 47. Therefore, the hot water tank 47 functions as a backflow prevention means.

In the hot water tank 47, a high water level electrode (first water level detecting means) 471, a low water level electrode (second water level detecting means) 472, and an earth electrode having different lengths for detecting the amount of hot water stored are provided. 473 is 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 water level (first water level) and a predetermined high water level (second water level), and are turned off when the water level does not reach the predetermined high water level and low water level, respectively. Become.

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 sterilizing pipe branched from the hot water connecting pipe 66c on the downstream side of the pump 48 and the mist nozzle provided on the ceiling wall of the bathroom BR are sterilized water such as ozone water and hypochlorite water. It is also possible to spray sterilizing water into the bathroom BR and sterilize the entire bathroom BR by connecting via a sterilizing device that generates sterilizing water.

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 incorporates a cleaning control circuit that controls the cleaning operation. In addition, the cleaning control circuit drives the pump 48 at a predetermined rotation rate as a functional configuration means, opens and closes the water replenishing electromagnetic valve 46 and the on-off electromagnetic valve 49, and opens and closes the water amount adjusting valve 85 and the hot water amount adjusting valve 86. The outflow time from when the high water level electrode 471 is turned off to when the low water level electrode 472 is turned off when the pump 48 is driven at a predetermined rotation rate, which is the cleaning operation control unit that controls and executes the cleaning operation. The pump 48 is rotated at a predetermined time based on the time measuring part, the outflow time measured at the time measuring part, and the predetermined water level from the high water level at which the high water level electrode 471 is turned off to the low water level at which the low water level electrode 472 is turned off. A calculation unit that calculates the flow rate when rotated by a number, the calculated flow rate calculated by the calculation unit is compared with the predetermined set flow rate corresponding to the predetermined rotation rate of the pump 48 so that the predetermined set flow rate is obtained. Is provided with a flow rate correction unit that corrects the rotation speed of the pump 48. Therefore, in the present embodiment, each functional unit of the cleaning control circuit functions as a cleaning operation control means, a calculation means, and a flow rate correction means. Further, in the memory of the main unit controller 40, in addition to various set values such as a program for executing a cleaning operation and an initial set value of the rotation rate of the pump 48 with respect to a predetermined set flow rate, the rotation of the pump 48 for changing the flow rate is performed. A data table containing the correction values of the numbers is stored.

FIG. 2 shows that the rotation speed of the pump 48 is corrected according to the deviation of the calculated flow rate calculated when the pump 48 is rotated at a predetermined rotation speed in the bathtub cleaning device of the present embodiment with respect to a predetermined set flow rate. It is a data table which shows an example of the correction value for this. Explaining the deviation of the calculated flow rate with respect to the predetermined set flow rate and the corresponding correction value of the rotation speed of the pump 48 with reference to FIG. 2, the correction value of the rotation speed of the pump 48 is set in seven stages, for example. If the calculated flow rate is within ± 5% of the predetermined set flow rate, it is determined that the approximate flow rate is obtained, and the rotation speed of the pump 48 is not corrected. However, for example, when the calculated flow rate is 5 to 7.5% higher than the predetermined set flow rate, it becomes higher than the predetermined injection position, so that the correction is performed to reduce the rotation speed of the pump 48 by 5 Hz, and the calculated flow rate is predetermined. If it is 5 to 7.5% less than the set flow rate of, the injection position is lower than the predetermined injection position, so that the correction is performed to increase the rotation speed of the pump 48 by 5 Hz. These values are obtained in advance by experiments and are appropriately set according to the performance of the pump 48, the length of the flow path, and the like.

Next, the cleaning operation in the bathtub cleaning device of the present embodiment will be described with reference to FIGS. 3 to 7. Although each step of the washing operation described later is designed to obtain the same set flow rate (for example, 6 L / min), the set flow rate in each step may be different. 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 the bathtub 1 is used, 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 main unit controller 40 2 opens the drain plug 2 and starts the timer ta to measure the drain time a (for example, 5 minutes) (steps ST1 to ST2).

When the drainage time a elapses, it is determined whether or not the high water level electrode 471 in the hot water tank 47 is on, and if the high water level electrode 471 is off, the refilling solenoid valve 46 is opened. 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 equal to or greater than a predetermined amount, the water heater 6 starts the hot water supply operation. Then, when the high water level electrode 471 is turned on, the water replenishment solenoid valve 46 is closed (steps ST3 to ST7).

When the high water level electrode 471 is turned on, the on-off solenoid valve 49 is opened while the supply of hot water to the hot water tank 47 is stopped. Then, the pump 48 is driven at the rotation speed corrected by the correction value updated in the previous end-time correction step stored in the memory described later so that the set flow rate for correction can be obtained, and the ceiling of the bathroom BR is obtained. Hot water is supplied from the main body unit 4 installed on the back to the washing water generation unit 3 in the bathroom BR (steps ST8 to ST9). As a result, the correction step at the start is started.

When the amount of hot water in the hot water tank 47 decreases and the high water level electrode 471 is turned off, the timer t1 is started to start the time counting of the outflow time, and when the low water level electrode 472 is turned off, the time counting is ended. Next, the pump 48 is stopped and the on-off solenoid valve 49 is closed. Then, the flow rate is calculated based on the timed outflow time and the amount of water from the high water level at which the high water level electrode 471 is turned off to the low water level at which the low water level electrode 472 is turned off, and the calculated flow rate and the set flow rate for correction are calculated. In comparison, the correction value of the rotation rate of the pump 48 is determined based on the data table of FIG. 2 described above, and the correction value recorded in the memory is updated (steps ST10 to ST17). At this time, the rotation speed corrected by the updated correction value is outside the predetermined upper and lower limit range (for example, with respect to the initial setting value) with respect to the initial setting value for obtaining the set flow rate for correction in the correction process at the start. If it is more than ± 20%), there is a high possibility that an abnormality has occurred in the pump 48 or the flow path. Therefore, the abnormality is notified from the display unit 110, a speaker (not shown), or the like without continuing the cleaning operation (step ST18). ~ ST19). As a result, the correction step at the start is completed.

When the correction value is updated as described above, the process proceeds to the preliminary cleaning step. In the pre-cleaning step, the water replenishment solenoid valve 46 is opened, the opening degrees of the water amount adjusting valve 85 and the hot water amount adjusting valve 86 are adjusted, and hot water is supplied to the hot water tank 47 until the high water level electrode 471 is turned on. When the high water level electrode 471 is turned on, the timer tb is started to measure the pre-cleaning time b (for example, 90 seconds). Then, while the water replenishing solenoid valve 46 is opened, the on-off solenoid valve 49 is opened, and the rotation speed corrected by the correction value updated in the start correction step so that the set flow rate for pre-cleaning can be obtained. Drives the pump 48 (steps ST20 to ST25). 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 b has elapsed, the pump 48 is stopped and the on-off solenoid valve 49 is closed to end the pre-cleaning step (steps ST26 to ST28). Further, the timer ct is started in order to measure the predetermined washing time c (for example, 2 seconds). Then, the on-off solenoid valve 49 and the first and second detergent valves 42a and 42b are opened, and the pump is pumped at the rotation speed corrected by the correction value updated in the start correction step so that the set flow rate for cleaning can be obtained. 48 is driven (steps ST29 to ST32). As a result, the detergent and hot water are supplied to the detergent mixing unit 51 to generate cleaning water, and the cleaning step of injecting the cleaning water into the bathtub 1 from the cleaning nozzle 7 is executed.

When the predetermined cleaning time c has elapsed, the pump 48 is stopped, and the on-off solenoid valve 49 and the first and second detergent valves 42a and 42b are closed to end the cleaning process (steps ST33 to ST36). Further, the timer td is started in order to measure the predetermined rinsing time d (for example, 90 seconds). Then, the on-off solenoid valve 49 is opened, and the pump 48 is driven at a rotation speed corrected by the correction value updated in the correction step at the start so that the set flow rate for rinsing can be obtained (steps ST37 to ST39). 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.

When the predetermined rinsing time d has elapsed, the pump 48 is stopped and the on-off solenoid valve 49 is closed to end the rinsing process (steps ST40 to ST42). Then, the process proceeds to the correction step at the end. In the end correction step, hot water is supplied to the hot water tank 47 until the high water level electrode 471 is turned on, as in the start correction step. Then, when the high water level electrode 471 is turned on, the water replenishment solenoid valve 46 is closed (steps ST43 to ST44).

When the high water level electrode 471 is turned on, the on-off solenoid valve 49 is opened in the same manner as in the start correction step, and the correction value is corrected by the correction value updated in the start correction step so that the set flow rate for correction can be obtained. The pump 48 is driven by the rotation speed. Next, when the high water level electrode 471 is turned off, the timer t2 is started to start the time counting of the outflow time until the low water level electrode 472 is turned off, and when the low water level electrode 472 is turned off, the time counting is ended. Next, the pump 48 is stopped, the on-off solenoid valve 49 is closed, and the drain plug 2 is closed. Then, the flow rate is calculated based on the timed outflow time and the amount of water from the high water level at which the high water level electrode 471 is turned off to the low water level at which the low water level electrode 472 is turned off, and the calculated flow rate and the set flow rate for correction are calculated. In comparison, the correction value of the rotation rate of the pump 48 is determined and updated again based on the data table of FIG. 2 described above (steps ST45 to ST55). Therefore, as described above, in the start correction step at the start of the next cleaning operation, the rotation speed of the pump 48 is corrected by the correction value updated in the end correction step so that the set flow rate for correction can be obtained. Will be done. At this time, the rotation speed corrected by the updated correction value is outside the predetermined upper and lower limit range (for example, with respect to the initial setting value) with respect to the initial setting value for obtaining the set flow rate for correction in the correction process at the end. If it is more than ± 20%), the abnormality is notified from the display unit 110, a speaker (not shown), or the like (steps ST56 to ST57), as in the start correction step. As a result, the correction step at the end is completed.

As described in detail above, according to the bath cleaning device, the high water level electrode 471 for detecting the high water level and the low water level electrode 472 for detecting the low water level are arranged in the hot water tank 47, so that the flow rate is high. Outflow from high water level to low water level when the on-off electromagnetic valve 49 is opened and the pump 48 is driven at a predetermined rotation speed while hot water is stored in the hot water tank 47 without using a sensor. Based on the time, the flow rate ejected from the cleaning nozzle 7 can be calculated.

Then, according to the above-mentioned tub cleaning device, the calculated flow rate and the predetermined set flow rate are compared, and the correction value of the rotation speed is determined according to the deviation of the calculated flow rate with respect to the predetermined set flow rate, and the correction value is corrected. Since the pump 48 in the cleaning process is driven by the number of revolutions, even if the flow rate of the hot water pumped from the hot water tank 47 changes due to variations in pump performance or deterioration over time, the cleaning water is cleaned at a predetermined set flow rate in the cleaning process. Can be jetted from. As a result, the washing water can be stably sprayed to a predetermined spraying position.

Further, in the bathtub cleaning device, the pump 48 is driven at a rotation speed corrected by a correction value so that a predetermined set flow rate can be obtained even in the pre-cleaning step and the rinsing step executed before and after the cleaning step. Dust and washing water adhering to the inner wall surface of the bathtub 1 can be efficiently washed away before and after. Thereby, the cleaning performance can be further improved.

Further, according to the bathtub cleaning device, the correction step at the start is executed at the start of the cleaning operation to determine the correction value of the pump 48, so that the flow rate obtained by the corrected number of revolutions in each step of the cleaning operation immediately after is executed. Hot water or washing water can be sprayed into the bathtub 1 from the washing nozzle 7.

Further, according to the above-mentioned bath cleaning device, the end-time correction step is executed at the end of the washing operation to update the correction value of the rotation rate of the pump 48, so that the rotation corrected by the correction value updated in the start-time correction step is performed. Even if the flow rate when the pump 48 is driven by the number greatly deviates from the predetermined set flow rate or the flow rate changes during the previous cleaning operation, the deviation from the predetermined set flow rate in the next cleaning operation. It can be started from a state with a small amount of water.

Further, according to the bathtub cleaning device, in the start-time correction step and the end-time correction step, the flow rate is calculated with the refilling solenoid valve 46 closed, so that the amount of hot water supplied to the hot water tank 47 can be determined. Since it is not necessary to consider it, the calculation accuracy can be improved as compared with the case where the flow rate is calculated with the water replenishment solenoid valve 46 opened.

Therefore, according to the present invention, it is possible to provide a bathtub cleaning device having excellent cleaning performance at a low cost.

(Other embodiments)
(1) In the above embodiment, the correction step is executed both at the start and the end of the washing operation, but the rotation speed of the pump may be corrected only by one of the correction steps.
(2) In the above embodiment, the correction step is executed as a part of the washing operation, but it may be executed separately from the washing operation, or it may be incorporated into each step in the washing operation and executed. good. For example, a part or all of the pre-cleaning step and the rinsing step may be performed as a correction step.
(3) In the above embodiment, the flow rate to be injected at the predetermined injection position is set to the predetermined set flow rate, but the user may select an arbitrary flow rate and set it to the predetermined set flow rate.
(4) In the above embodiment, hot water is supplied to the hot water tank only from the water heater side, but the hot water sprayed into the bathtub may be circulated to the hot water tank again.

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 (first water level detecting means)
472 Low water level electrode (second water level detection means)

Claims (4)

A storage container for storing hot water supplied from the heat source machine,
A first water level detecting means for detecting a predetermined first water level in a storage container, and
A second water level detecting means for detecting a predetermined second water level lower than the first water level in the storage container, 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 supplies hot water from the storage container to the detergent mixing section,
Detergent introduction pipe that supplies detergent from the detergent tank to the detergent mixing part,
A cleaning nozzle that sprays cleaning water into the bathtub,
A cleaning pipe that supplies cleaning water from the detergent mixing section to the cleaning nozzle,
A pump installed in the hot water connecting pipe that injects and stops the washing water from the washing nozzle,
A cleaning operation control means for controlling the cleaning operation of cleaning the bathtub by injecting cleaning water into the bathtub from the cleaning nozzle,
A calculation means for calculating the flow rate ejected from the cleaning nozzle based on the outflow time from the first water level to the second water level when the pump is rotated at a predetermined rotation speed.
The flow rate calculated by the calculation means is compared with the predetermined set flow rate, and the predetermined set flow rate is based on the data table including the deviation of the calculated flow rate with respect to the predetermined set flow rate and the correction value of the corresponding pump rotation rate. A tub cleaning device comprising a flow rate compensating means for compensating for the number of revolutions of the pump in the cleaning operation so as to obtain . In the bathtub cleaning device according to claim 1,
The calculation means is a bathtub cleaning device that rotates the pump at a predetermined rotation speed at the start of the cleaning operation and calculates the flow rate ejected from the cleaning nozzle based on the outflow time from the first water level to the second water level. In the bathtub cleaning device according to claim 1 or 2.
The calculation means is a bathtub cleaning device that rotates the pump at a predetermined rotation speed at the end of the cleaning operation and calculates the flow rate ejected from the cleaning nozzle based on the outflow time from the first water level to the second water level. In the bathtub cleaning device according to claim 3,
The cleaning operation control means is a bathtub cleaning device that corrects the rotation speed of the pump and starts the cleaning operation based on the correction of the rotation speed of the pump at the end of the previous cleaning operation.

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