JP2022055066A - Bathtub washing device - Google Patents

Abstract

To provide a bathtub washing device capable of notifying an opening failure in a hot water passage for supplying hot water to a hot water storage part.SOLUTION: A bathtub washing device includes a hot water passage for supplying hot water to a washing nozzle provided in a bathtub, a hot water storage part provided in the course of the hot water passage, a pump for feeding the hot water in the hot water storage part to the washing nozzle, and control means for controlling a washing operation for spraying the hot water and a cleaning fluid from the washing nozzle. The bathtub washing device includes a hot water pouring solenoid valve for opening/closing the hot water passage on the upstream side of the hot water storage part, water level detection means for detecting a water level of the hot water storage part, and notification means for notifying information about the washing operation. The control means closes the hot water pouring solenoid valve and also drives the pump to control a drainage operation for draining the hot water until the hot water storage part becomes empty when the washing operation ends, and the notification means performs an error notification in the case that the water level detection means detects that the hot water storage part is not empty regardless of execution of the drainage operation.SELECTED DRAWING: Figure 4

Description

The present invention relates to a bathtub cleaning device for automatically cleaning a bathtub, and the present invention relates to a bathtub cleaning device provided with a hot water storage unit for storing hot water so as to be able to cope with a particularly low tap water supply pressure.

Conventionally, a bathtub cleaning device that automatically cleans a bathtub has been used. The bathtub cleaning device cleans the bathtub by spraying a cleaning liquid in the bathtub to float dirt and spraying hot water to wash it away.

For example, in the wall-mounted bathroom cleaning device of Patent Document 1, the electromagnetic valve is opened, clean water is sprayed from the water nozzle portion, and the clean water stored in the water tank and the detergent in the detergent tank are sucked up by a pump and mixed. Is described to be sprayed from the detergent nozzle portion. Clean water is supplied to the water tank when the solenoid valve is opened. Since it is a wall-mounted type, if a problem that the solenoid valve cannot be closed (open failure) occurs, clean water will flow out from the water nozzle, and the open failure can be easily found.

However, in areas where the supply pressure of clean water is low, buildings, etc., it may not be possible to spray sufficient force of clean water from the water nozzle portion, and sufficient cleaning may not be possible. Therefore, in order to cope with the case where the supply pressure of clean water is low, for example, as in Patent Document 2, an open-air tank (hot water storage unit) for storing hot water is provided in the middle of the hot water passage for supplying hot water for cleaning. There is known a bathtub cleaning device that has and drives a pump to spray hot water in a hot water storage unit into a bathtub. A ball tap that opens and closes according to the water level of the hot water storage section is installed on the upstream side of the hot water storage section of the hot water passage, and hot water is supplied so that a constant storage amount is maintained.

Japanese Unexamined Patent Publication No. 10-272701 Jitsufuku No. 4-40632 Gazette

In the bathtub cleaning device of Patent Document 2, when a failure occurs in the ball tap, the supply of hot water does not stop, so that hot water overflows from the hot water storage unit (overflow). However, depending on the location where the hot water storage unit is installed, it may be difficult to confirm the overflow.

For example, when the hot water storage unit is installed on the bathtub pan and is obscured by the bathtub, the overflowing hot water is drained from the drain of the bathroom without being visible, and the amount of hot water used increases without the user noticing it. There is a risk of doing so. Further, if the hot water supply device continues to supply hot water to the hot water storage unit for a long time, an error of the hot water supply device that is operating normally may be notified, and the cause may not be easily identified.

On the other hand, if a means for detecting the flow rate of hot water passing through the ball tap is equipped, it becomes possible to detect an open failure. Further, if the hot water storage unit is equipped with an overflow detecting means, it becomes possible to estimate the opening failure of the hot water passage as the cause of the overflow that has occurred. However, it is not preferable because the manufacturing cost increases due to the addition of parts.

An object of the present invention is to provide a bathtub cleaning device capable of notifying an opening failure in a hot water passage on the upstream side of a hot water storage unit without adding parts.

The bathtub cleaning device according to claim 1 has a hot water passage for supplying hot water to a cleaning nozzle provided in the bathtub, a hot water storage unit provided in the middle of the hot water passage, and the hot water storage unit in the cleaning nozzle. Note for opening and closing the hot water passage on the upstream side of the hot water storage unit in a bathtub cleaning device equipped with a pump for sending out hot water and a control means for controlling a washing operation in which hot water and cleaning liquid are sprayed from the cleaning nozzle. It has a hot water electromagnetic valve, a water level detecting means for detecting the water level of the hot water storage unit, and a notifying means for notifying information about the washing operation, and the control means has the note at the end of the washing operation. The hot water storage unit is not empty even though the hot water electromagnetic valve is closed and the pump is driven to control the drainage operation of draining hot water until the hot water storage unit is empty. When the water level detecting means detects this, the notification means performs an error notification.

According to the above configuration, the hot water stored in the hot water storage section is used for the washing operation, the pouring solenoid valve is closed at the end of the washing operation, the pump is driven, and the drainage operation is performed until the hot water storage section is empty. I do. Then, when it is detected that the water level detecting means is not empty in the hot water storage unit that should be emptied by the execution of the drainage operation, an error notification regarding the water level is performed. Therefore, by performing an error notification when the hot water storage unit is not emptied due to the drainage operation, it is indirectly upstream from the hot water storage unit that is presumed to be the cause of the hot water storage unit not being emptied without adding parts. It is possible to notify the opening failure in the hot water passage on the side.

In the invention of claim 1, the water level detecting means of the invention of claim 2 detects the first water level of the hot water storage unit and the second water level higher than the first water level. The control means determines that the hot water storage unit is emptied when the water level becomes lower than the first water level due to the drainage operation, and after the cleaning operation is completed while maintaining the closing of the hot water pouring electromagnetic valve. It is characterized in that the error notification is performed when the water level detecting means detects that the water level is equal to or higher than the second water level within the period until the start of the next washing operation.

According to the above configuration, when the water level of the hot water storage section becomes lower than the first water level due to the drainage operation, it is determined that the water level is empty, the cleaning operation is terminated, and the next time while keeping the hot water pouring solenoid valve closed. When the water level of the hot water storage unit becomes the second water level or higher by the start of the washing operation, an error notification regarding the water level is performed. Therefore, by notifying an error when hot water has accumulated to the second water level by the next cleaning operation with the pouring solenoid valve closed in the empty hot water storage section where the water level is lower than the first water level, the component It is possible to indirectly notify the opening failure in the hot water passage on the upstream side of the hot water storage portion that is presumed to be the cause, without adding. In addition, since an error notification is sent when the water level is higher than the first water level and becomes higher than the second water level, water droplets adhering to the inner wall of the hot water storage section fall to the first water level after the washing operation is completed. It is possible to prevent false alarms such as when it becomes.

In the invention of claim 2, the tub cleaning device according to the third aspect of the present invention includes a parallel passage portion in which a plurality of branch passages are connected in parallel on the upstream side of the hot water storage portion of the hot water passage, and the plurality of the hot water passage portions. Each of the branch passages has a plurality of the pouring electromagnetic valves for opening and closing, and the control means maintains the water level of the hot water storage unit between the preset lower limit water level and the upper limit water level in the washing operation. The opening and closing of the plurality of pouring electromagnetic valves is controlled so as to be characterized, the first water level is set to the lower limit water level, and the second water level is set to the upper limit water level.

According to the above configuration, the control unit stores hot water so that the water level of the hot water storage unit is maintained between the first water level set at the lower limit water level and the second water level set at the upper limit water level during the washing operation. It controls the opening and closing of multiple pouring solenoid valves installed in the parallel passage section in the hot water passage section on the upstream side of the section. Then, when the water level of the hot water storage section becomes less than the lower limit water level due to the drainage operation, it is determined that the water level is empty and the washing operation is terminated. If this happens, an error notification regarding the water level will be given. Therefore, parts should be added to the empty hot water storage section below the lower limit water level by notifying an error when hot water has accumulated to the upper limit water level by the next cleaning operation with the pouring solenoid valve closed. Instead, it is possible to indirectly notify the opening failure in the hot water passage on the upstream side of the hot water storage unit.

The bathtub cleaning device according to claim 4 is characterized in that, in the invention of any one of claims 1 to 3, the error notification includes notification of an opening failure of the pouring solenoid valve.
According to the above configuration, the error notification regarding the water level includes the notification of the opening failure of the pouring solenoid valve installed on the upstream side of the hot water storage part of the hot water passage presumed to be the cause, so that the opening failure is directly caused. You can tell and encourage a response.

According to the bathtub cleaning device of the present invention, it is possible to notify the opening failure in the hot water passage on the upstream side of the hot water storage unit without adding any parts.

It is a block diagram of the bathtub cleaning apparatus and peripheral equipment which concerns on embodiment of this invention. It is a process block diagram of the washing operation which concerns on Example. It is operation explanatory drawing of the pouring solenoid valve in the washing operation which concerns on Example. It is a flowchart of open failure detection control which concerns on embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to examples.

First, the overall configuration including the peripheral device of the bathtub cleaning device 10 of the present invention will be described with reference to FIG. The bathtub 1 and the hot water supply device 2 are connected to the hot water filling reheating passage 3 via the circulation adapter 1a for hot water filling and reheating of the bathtub 1. Further, at the bottom of the bathtub 1, for example, an electric drain plug 4 for draining hot water and a washing nozzle 5 for spraying hot water or a washing liquid to wash the bathtub 1 are arranged at the bottom of the bathtub 1. Has been done.

In the vicinity of the bathtub 1, a supply unit 6 that supplies hot water and cleaning liquid to the cleaning nozzle 5, a detergent tank 7 that stores detergent to be supplied to the supply unit 6, and a drain plug 4 are opened and closed. A drainage switch 8 for the purpose is arranged. A hot water supply passage 2a for supplying hot water from the hot water supply device 2 is connected to the supply unit 6.

Further, for example, the power supply communication unit 9 and the supply unit 6 arranged behind the ceiling of the bathroom are connected so as to be able to supply electric power and to communicate with each other. The power communication unit 9 includes a control unit 20 (control means) that controls the cleaning operation of the bathtub cleaning device 10. The bathtub cleaning device 10 includes a drain plug 4, a cleaning nozzle 5, a supply unit 6, a detergent tank 7, a drain switch 8, a power communication unit 9, a control unit 20, and the like.

The hot water supply device 2 is a combustion type hot water supply device that supplies hot water obtained by heating the clean water indicated by the arrow W by using, for example, the combustion heat of fuel, but is a hot water supply device having another heat source machine such as a heat pump type heat source machine. There may be. A bathroom remote controller 11 and a kitchen remote controller 12 for performing a hot water filling operation, a reheating operation start operation, a hot water supply set temperature setting operation, and the like are connected to the hot water supply device 2 so as to be communicable. Further, a cleaning remote controller 13 for performing an operation for starting a cleaning operation by the bathtub cleaning device 10 is communicably connected to the power supply communication unit 9. Then, the hot water supply device 2 and the power supply communication unit 9 are communicably connected, and the bathtub cleaning device 10 can be operated from the kitchen remote controller 12 and the bathroom remote controller 11. The cleaning remote controller 13, the kitchen remote controller 12, and the bathroom remote controller 11 are notification means for notifying information about the cleaning operation by display or voice.

Next, the bathtub cleaning device 10 will be described.
The supply unit 6 of the bathtub cleaning device 10 has a hot water passage 14 for supplying hot water to the cleaning nozzle 5, a hot water tank 15 (hot water storage unit) provided in the middle of the hot water passage 14, and a hot water tank 15 for the cleaning nozzle 5. It has a pump 16 and the like for sending out hot and cold water. A venturi 17 for mixing the detergent with the hot water supplied to the washing nozzle 5 is interposed in the hot water passage 14 on the downstream side of the pump 16. The hot water tank 15 is, for example, a small one having a maximum storage capacity of about 0.5 L, and is suitable for arranging the supply unit 6 so as not to be visible in the vicinity of the bathtub 1.

The hot water supply passage 2a for supplying hot water from the hot water supply device 2 is connected to the hot water passage 14 provided with the filter 14a. The hot water passage 14 has a parallel passage portion 18 that branches and joins on the upstream side of the hot water tank 15 and on the downstream side of the filter 14a. In the parallel passage portion 18, a plurality of (for example, two) branch passages 18a and 18b are connected in parallel.

The branch passage 18a includes a pouring solenoid valve 18c for opening and closing the branch passage 18a and a constant flow rate valve 18e. The branch passage 18b includes a pouring solenoid valve 18d and a constant flow rate valve 18f for opening and closing the branch passage 18b. The constant flow rate valves 18e and 18f are limited to a flow rate smaller than the discharge capacity of the pump 16 (for example, 6.5 L / min as a normal flow rate), and the total flow rate is larger than the normal flow rate of the pump 16 (for example). 5 L / min each) is selected. The flow rates when the pouring solenoid valves 18c and 18d in the branch passages 18a and 18b are opened are equal to each other by the constant flow rate valves 18e and 18f.

Further, the hot water passage 14 is provided with a pump 16, a temperature sensor 19, a flow rate sensor 14b, a venturi 17, and the like on the downstream side of the hot water tank 15. A detergent passage 7a for supplying detergent from the detergent tank 7 is connected to the venturi 17. The detergent passage 7a is provided with a detergent solenoid valve 7b for opening and closing the detergent passage 7a.

The control unit 20 is connected so that the pouring solenoid valves 18c and 18d and the detergent solenoid valve 7b can be opened and closed and the pump 16 can be driven, and the drain plug 4 can be opened and closed according to the operation of the drain switch 8. Has been done. Further, the control unit 20 is connected to, for example, a float switch 15a, which is a water level detecting means for detecting the water level of the hot water tank 15, and a float switch 7c, which detects the liquid level of the detergent in the detergent tank 7.

A first water level L and a second water level H are set in the hot water tank 15. The first water level L corresponds to the lower limit water level of the hot water tank 15 preset for controlling the water level, and the second water level H corresponds to the upper limit water level of the hot water tank 15 preset. Of the hot water stored in the hot water tank 15, most of the hot water that exceeds the upper limit water level flows from the overflow port 15b of the hot water tank 15 to the bathtub pan and is drained from the drain port of the bathroom.

The float switch 15a may detect the first water level L corresponding to the lower limit water level of the hot water tank 15 and the second water level H corresponding to the upper limit water level. Further, as the water level detecting means, a plurality of electrode rods for detecting the first water level L and the second water level H can be used, respectively, but a float switch is preferable from the viewpoint of preventing erroneous detection of the water level due to water splashing or the like.

The control unit 20 is, for example, a computer equipped with an arithmetic unit, a storage device, an input / output device, and the like, and is a cleaning operation for cleaning the bathtub 1 and opening / closing of the drain plug 4 based on a control program or the like stored in the storage device. To control. In the cleaning operation, the control unit 20 opens the drain plug 4 and controls the opening / closing of the pouring solenoid valves 18c and 18d, the detergent solenoid valve 7b, and the driving of the pump 16.

Next, the cleaning operation will be described.
The cleaning operation is performed with a lid (not shown) covered on the bathtub 1 so that the cleaning liquid or the like does not scatter outside the bathtub 1.

When the bathtub cleaning device 10 starts the cleaning operation by operating an operation terminal such as the cleaning remote controller 13, the cleaning operation is started. For example, as shown in the process block diagram of the cleaning operation in FIG. 2, the cleaning operation is performed in the order of the preparation process, the cleaning process, and the drainage process.

In the preparatory step, as a preparatory operation before cleaning, for example, the pouring solenoid valve 18c is opened to store hot water in the hot water tank 15 up to the second water level H. Further, when the drain plug 4 is closed, the drain plug 4 is opened, and when hot water remains in the bathtub 1, the bathtub 1 is waited until it becomes empty. The state of storing the hot water in FIG. 3 (a) and the state of completing the hot water storage in FIG. 3 (b) correspond to this preparatory step. In FIG. 3, the hot water flowing into the hot water tank 15 from the hot water supply device 2 through the parallel passage portion 18 and the hot water flowing out from the hot water tank 15 are indicated by white arrows.

In the cleaning step, hot water or cleaning liquid from the hot water tank 15 is sprayed into the bathtub 1 as a cleaning operation. For example, the pump 16 is driven to start supplying hot water to the cleaning nozzle 5 at a normal flow rate (see FIG. 3C), the pouring solenoid valve 18c and the like are opened, and the cleaning nozzle is stored in the hot water tank 15 while storing hot water. Hot water is sprayed from No. 5 (see FIGS. 3 (d) and 3 (e)), and the dirt adhering to the bathtub 1 is moistened as a preliminary cleaning.

After that, the detergent solenoid valve 7b was opened while driving the pump 16, the detergent was supplied from the detergent passage 7a to the hot water flowing through the venturi 17, and the cleaning liquid in which the hot water and the detergent were mixed was sprayed from the cleaning nozzle 5 at the venturi 17. After that, wait for a certain period of time. This cleaning liquid spraying and waiting for a certain period of time are alternately repeated to float the dirt adhering to the bathtub 1. During the standby, the storage of hot water is stopped, and when the cleaning liquid spraying is resumed, the storage of hot water is resumed in the same state as before the standby.

When spraying hot water or cleaning liquid, the pump 16 supplies hot water at a normal flow rate from the hot water tank 15 to the cleaning nozzle 5. Due to the pouring solenoid valves 18c and 18d opened and closed at this time, in the hot water tank 15, the storage amount increases in the first mode in which both the pouring solenoid valves 18c and 18d are opened, and the pouring solenoid valves 18c and 18d are opened and closed. In the second mode in which only one of them is opened, the storage amount decreases.

At the start of the pre-cleaning, for example, hot water is stored in the second mode in which only the pouring solenoid valve 18c is opened (see FIG. 3D). During spraying of hot water or cleaning liquid, the control unit 20 shifts to the first mode when the float switch 15a detects the first water level L, and opens both the hot water pouring solenoid valve 18c and the hot water pouring solenoid valve 18d (FIG. 3 (e)). Then, when the float switch 15a detects the second water level H, the mode shifts to the second mode, and the pouring solenoid valve 18d is closed with the pouring solenoid valve 18c open (see FIG. 3D). The solenoid valve that can be opened in the second mode may be replaced.

When hot water or cleaning liquid is being sprayed, switching between the first mode and the second mode is repeated, and the water level of the hot water tank 15 repeatedly moves back and forth between the first water level L and the second water level H to reach the first water level L. Although it is maintained between the second water level H and the second water level H, the hot water of the hot water tank 15 can be stably supplied to the washing nozzle 5 regardless of the supply pressure of the hot water from the hot water supply device 2.

After repeating the spraying and waiting of the cleaning liquid a predetermined number of times, the pump 16 is driven as a rinse and hot water is sprayed to wash away the dirt and the cleaning liquid, and the cleaning process is completed. There are cases where the cleaning process is completed in the first mode and cases where the cleaning process is completed in the second mode, and in either case, the drainage process can be started. When waiting for a certain period of time from the first mode or when shifting from the first mode to the drainage process, the second mode is switched to for a short time of about a few seconds at the end, and a plurality of pouring solenoid valves 18c, 18d. It is also possible to reduce the water hammer effect compared to the case of closing at the same time.

In the drainage process, the pump 16 is driven with both the pouring solenoid valves 18c and 18d closed, and the remaining hot water is drained from the washing nozzle 5 to the bathtub 1 until the hot water tank 15 is empty. (See FIG. 3 (f)). Then, when the hot water tank 15 becomes empty, the pump 16 is stopped to end the drainage process, and the cleaning operation is completed (see FIG. 3 (g)).

The emptying of the hot water tank 15 is determined by the fact that a predetermined time (for example, 3 seconds) has elapsed since the float switch 15a for detecting the water level of the hot water tank 15 detects the first water level L which is the lower limit water level. .. It should be noted that the determination can be made based on the fact that the detected flow rate of the flow rate sensor 14b is equal to or less than a predetermined flow rate (for example, 1 L / min), the current value of the pump 16 reflecting the load of the pump 16, and the like.

When the float switch 15a detects that the hot water tank 15 is not empty even though the drainage operation is performed, the cleaning remote controller 13, the kitchen remote controller 12, etc. are notified by display or voice that a problem related to the water level has occurred (error notification). .. For example, if the hot water tank 15 is not emptied even if the drainage operation is continued for a predetermined time (for example, 60 seconds), it is conceivable that the hot water tank 15 cannot be drained normally or the hot water supply does not stop.

Reasons for not being able to drain normally include a blockage on the downstream side of the hot water tank 15 of the hot water passage 14 and a failure of the pump 16. Since these can be determined based on the detected flow rate of the flow rate sensor 14b, the current value of the pump 16, and the like, the error notification regarding the water level can include the notification of the hot water passage blockage and the pump failure.

On the other hand, the fact that drainage cannot be performed normally means that an abnormality has already appeared in the flow rate of hot water in the cleaning operation before the drainage operation, and it is found that the hot water passage 14 is blocked on the downstream side of the hot water tank 15 or the pump 16 is out of order. Since there are many cases, it is unlikely to cause problems related to the water level in drainage operation. Therefore, in many cases, the cause of the problem related to the water level in the drainage operation is that the supply of hot water does not stop, and it is presumed that the cause is an open failure on the upstream side of the hot water tank 15 of the hot water passage 14. Therefore, it is possible to indirectly notify that the cause is an open failure on the upstream side of the hot water tank 15 of the hot water passage 14 by the error notification regarding the water level in the drainage operation. The open failure may be indirectly notified by notifying that the supply of hot water has not stopped.

If the downstream side of the hot water passage 14 from the hot water tank 15 is normal, the open failure can be directly notified including the notification of the open failure on the upstream side of the hot water tank 15 of the hot water passage 14 in the error notification. .. Since it is the pouring solenoid valves 18c and 18d that the opening failure occurs, the error notification may be performed including the notification of the pouring solenoid valve opening failure.

When the hot water tank 15 is emptied, the drainage operation is completed, and the washing operation is completed, the control unit 20 keeps the hot water pouring solenoid valves 18c and 18d closed during the period until the start of the next washing operation. While doing so, the water level of the hot water tank 15 is repeatedly detected. Then, when the hot water tank 15 emptied by the drainage operation is filled with hot water by the next washing operation, an error notification regarding the water level is performed. Since the drainage operation has been completed, it is presumed that the cause is an open failure on the upstream side of the hot water tank 15 of the hot water passage 14 as described above. The open failure detection control by the control unit 20 will be described with reference to the flowchart of FIG. Si (i = 1, 2, ...) In the figure represents a step.

In S1, it is determined whether or not the washing operation is in progress. If the determination of S1 is Yes (during the washing operation), the open failure detection control is terminated. If the determination in S1 is No (when the washing operation is not in progress), the process proceeds to S2.

In S2, it is determined whether or not the water level of the hot water tank 15 is equal to or higher than the second water level H. If the determination of S2 is Yes (when the second water level H or higher is detected), the process proceeds to S3. Then, in S3, even when the pouring solenoid valves 18c and 18d are closed, the supply of hot water does not stop and the water level becomes H or higher, so that an error notification regarding the water level is performed. At this time, it is also possible to notify the error including the opening failure (opening failure of the pouring solenoid valves 18c and 18d) on the upstream side of the hot water tank 15 of the hot water passage 14 which is presumed to be the cause.

On the other hand, when the determination of S2 is No (when the second water level H is not detected), the process returns to S1. It is also possible to notify the error when the first water level L is detected in S2. However, when the water level at the end of the washing operation is lower than the first water level L and close to the first water level L, for example, water droplets adhering to the inner wall of the hot water tank 15 fall and the first water level L is detected. In order to avoid such false alarms, it is preferable to perform error notification when a second water level H having a higher water level than the first water level L is detected.

The operation and effect of the bathtub cleaning device 10 will be described.
The bathtub cleaning device 10 uses the hot water stored in the hot water tank 15 in the washing operation, closes the pouring solenoid valves 18c and 18d at the end of the washing operation, drives the pump 16, and emptys the hot water tank 15. Drain the water until it becomes. Then, when it is detected that the float switch 15a is not empty in the hot water tank 15 that should be emptied by the execution of the drainage operation, an error notification regarding the water level is performed.

Therefore, by performing an error notification when the hot water tank 15 is not emptied due to the drainage operation, it is indirectly upstream from the hot water tank 15 that is presumed to be the cause of the hot water tank 15 not being emptied without adding parts. It is possible to notify the opening failure in the hot water passage 14 on the side.

The bathtub cleaning device 10 determines that the water level of the hot water tank 15 is emptied when the water level becomes lower than the first water level L due to the drainage operation, and ends the cleaning operation. Then, while maintaining the closed valves of the pouring solenoid valves 18c and 18d, when it is detected that the water level of the hot water tank 15 has reached the second water level H or higher by the start of the next washing operation, an error notification regarding the water level is notified. conduct.

Therefore, an error is notified when hot water has accumulated up to the second water level H by the next washing operation with the pouring solenoid valves 18c and 18d closed in the empty hot water tank 15 whose water level is lower than the first water level L. By performing the above, it is possible to indirectly notify the opening failure in the hot water passage 14 on the upstream side of the hot water tank 15 which is presumed to be the cause, without adding any parts. Further, since the error notification is performed when the water level becomes higher than the first water level L and becomes higher than the second water level H, the water droplets adhering to the inner wall of the hot water tank 15 fall after the cleaning operation is completed and the first water level is first. It is possible to prevent false alarms such as when the water level reaches L.

During the washing operation, the control unit 20 is upstream of the hot water tank 15 so that the water level of the hot water tank 15 is maintained between the first water level L set at the lower limit water level and the second water level H set at the upper limit water level. It controls the opening and closing of a plurality of hot water pouring solenoid valves 18c and 18d provided in the parallel passage portion 18 in the hot water passage 14 on the side. Then, when the water level of the hot water tank 15 becomes less than the first water level L of the lower limit water level due to the drainage operation, it is determined that the water level is empty and the washing operation is terminated. After that, while maintaining the closed valves of the pouring solenoid valves 18c and 18d, when it is detected that the water level of the hot water tank 15 has reached the second water level H or higher of the upper limit water level by the start of the next washing operation, the water level is related. Notify the error.

Therefore, in the state where the pouring solenoid valves 18c and 18d are closed in the empty hot water tank 15 whose water level is less than the lower limit water level, an error notification is given when the hot water level reaches the upper limit water level by the next washing operation. It is possible to indirectly notify the opening failure in the hot water passage 14 on the upstream side of the hot water tank 15 without adding any parts.

When performing error notification, it is also possible to directly notify the open failure by including the notification of the open failure on the upstream side of the hot water tank 15 of the hot water passage 14 in this error notification. Further, since it is the hot water pouring solenoid valves 18c and 18d that the open failure occurs on the upstream side of the hot water tank 15 of the hot water passage 14, the error notification including the notification of the hot water pouring solenoid valve open failure is performed, and the open failure is directly detected. It is also possible to notify the target.

An example of having a plurality of pouring solenoid valves 18c and 18d on the upstream side of the hot water tank 15 of the hot water passage 14 has been described, but one pouring solenoid valve is provided on the upstream side of the hot water tank 15 of the hot water passage 14. It can also be applied to cases such as when a pouring solenoid valve and a flow rate adjusting valve are provided. In addition, a person skilled in the art can carry out the embodiment in a form in which various modifications are added to the above embodiment without departing from the spirit of the present invention, and the present invention includes such modified embodiments.

1: Bathtub 1a: Circulation adapter 2: Hot water supply device 2a: Hot water supply passage 3: Hot water filling reheating passage 4: Drain plug 5: Cleaning nozzle 6: Supply unit 7: Detergent tank 7a: Detergent passage 7b: Detergent electromagnetic valve 7c: Float Switch 8: Drainage switch 9: Power supply communication unit 10: Bathtub cleaning device 11: Bathroom remote control (notification means)
12: Kitchen remote control (notification means)
13: Cleaning remote controller (notification means)
14: Hot water passage 14a: Filter 14b: Flow sensor 15: Hot water tank (hot water storage unit)
15a: Float switch (water level detecting means)
15b: Overflow port 16: Pump 17: Venturi 18: Parallel passages 18a, 18b: Branch passages 18c, 18d: Hot water pouring solenoid valves 18e, 18f: Constant flow rate valve 19: Temperature sensor 20: Control unit (control means)

Claims (4)

From the hot water passage that supplies hot water to the washing nozzles arranged in the bathtub, the hot water storage section provided in the middle of the hot water passage, the pump that sends hot water from the hot water storage section to the washing nozzle, and the washing nozzle. In a bathtub cleaning device equipped with a control means for controlling a cleaning operation of spraying hot water and a cleaning liquid.
A hot water pouring solenoid valve for opening and closing the hot water passage on the upstream side of the hot water storage unit, a water level detecting means for detecting the water level of the hot water storage unit, and a notification for notifying information on the washing operation. Have a means,
The control means closes the pouring solenoid valve at the end of the washing operation and drives the pump to control the drainage operation of draining hot water until the hot water storage unit is empty, and the drainage operation is performed. A bathtub cleaning device, characterized in that an error notification is performed by the notification means when the water level detecting means detects that the hot water storage unit is not empty despite the implementation. The water level detecting means is configured to detect the first water level of the hot water storage unit and the second water level higher than the first water level.
The control means determines that the hot water storage unit is emptied when the water level becomes lower than the first water level due to the drainage operation, and the next cleaning is performed after the cleaning operation is completed while maintaining the closing of the hot water pouring solenoid valve. The bathtub cleaning device according to claim 1, wherein the error notification is performed when the water level detecting means detects that the water level is equal to or higher than the second water level within a period until the start of operation. On the upstream side of the hot water storage portion of the hot water passage, a parallel passage portion in which a plurality of branch passages are connected in parallel and a plurality of the hot water pouring solenoid valves for opening and closing the plurality of branch passages are provided. ,
The control means controls the opening and closing of a plurality of the pouring solenoid valves so that the water level of the hot water storage unit is maintained between the preset lower limit water level and the upper limit water level in the washing operation.
The bathtub cleaning device according to claim 2, wherein the first water level is set to the lower limit water level and the second water level is set to the upper limit water level. The bathtub cleaning device according to any one of claims 1 to 3, wherein the error notification includes notification of an open failure of the pouring solenoid valve.

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