JP6895102B2 - Sanitary cleaning equipment - Google Patents

Description

Aspects of the present invention generally relate to sanitary cleaning equipment.

The sanitary cleaning device installed in the toilet sprays cleaning water from a nozzle onto a local part of the user to clean the local part. The sanitary cleaning device is desired to inject hot water at an appropriate temperature during local cleaning.

As a method of supplying hot water, a method called a central hot water supply method is adopted in facilities such as hotels where a large number of toilets are installed. In the central hot water supply system, water is heated by a heating device installed at one place to generate hot water. The generated hot water is guided to each toilet room by piping or the like. In addition to hot water, water at room temperature is guided to each toilet room by pipes such as water pipes. At this time, as the sanitary cleaning device, a hot water mixing device (mixing valve) that mixes water and hot water to generate hot water (mixed water) is used. This makes it possible to inject hot water at an appropriate temperature in local cleaning.

For example, a sanitary cleaning device having a hot water mixing device is provided with a nozzle-side flow path for supplying mixed water of hot water and water to a nozzle, and a waste water flow path (drainage section) for draining the mixed water to the outside. .. The temperature of the mixed water is measured using a thermistor or the like. In such a sanitary cleaning device, the cold water remaining inside is flowed into the waste water flow path, or the mixed water is flown into the waste water flow path instead of the nozzle side flow path until the mixed water reaches an appropriate temperature. be able to. After that, the mixed water having reached an appropriate temperature is flowed through the flow path on the nozzle side, and water is discharged from the nozzle.

JP-A-61-109986

In the sanitary cleaning device as described above, solenoid valves for opening and closing the respective flow paths are provided in the water flow path to the hot water mixing device and the hot water flow path to the hot water mixing device. If either the water flow path or the hot water flow path fails, such as when one of the solenoid valves fails, the temperature of the mixed water measured by the thermistor deviates from the predetermined range. When the mixed water is at a high temperature, for example, the mixed water is discarded in the waste water channel for a predetermined time (for example, about 3 minutes) so as to have an appropriate temperature. When the mixed water has a low temperature, for example, the mixed water is allowed to flow directly into the nozzle-side flow path, and water is discharged from the nozzle.

However, such a sanitary cleaning device cannot narrow down whether there is a problem in water supply or hot water supply. Therefore, when there is a failure, it may be difficult to identify the cause. Further, if the mixed water is thrown into the waste water channel every time when the mixed water is hot, a large amount of hot water or water may be required. It is desirable to reduce the amount of hot water and water consumed.

The present invention has been made based on the recognition of such a problem, and an object of the present invention is to provide a sanitary cleaning device in which the cause of a defect can be easily identified when the temperature of the mixed water of hot water and water is not appropriate. To do.

In the first invention, a water supply pipe to which water is supplied, a hot water supply pipe to which hot water is supplied, water supplied to the water supply pipe, and hot water supplied to the hot water supply pipe are mixed and mixed water. A hot water mixing device that produces water, a nozzle that discharges mixed water toward a local part of the human body, a drainage unit that drains mixed water, and a water supply electromagnetic valve that opens and closes a flow path from the water supply pipe to the hot water mixing device. A hot water supply electromagnetic valve that opens and closes a flow path from the hot water supply pipe to the hot water mixing device, a switching electromagnetic valve that switches between a state in which mixed water flows through the nozzle and a state in which the mixed water flows through the drainage portion, and the water supply. An electromagnetic valve, a control unit that controls the hot water supply electromagnetic valve and the switching electromagnetic valve, a toilet seat, a seating detecting means for detecting the seating of a user on the toilet seat, and a temperature measuring means for measuring the temperature of mixed water. When the seating detecting means detects the seating of the user, the control unit opens each of the water supply electromagnetic valve and the hot water supply electromagnetic valve, and causes the switching electromagnetic valve to flow mixed water to the drainage portion. When the drainage control for switching to the state is executed and the first temperature of the mixed water measured by the temperature measuring means after the drainage control is higher than a predetermined range, the hot water supply electromagnetic valve is closed, and then the hot water supply electromagnetic valve is closed. A sanitary cleaning device characterized in that the flow of mixed water to the nozzle is prohibited when the second temperature of the mixed water measured by the temperature measuring means is not lowered from the first temperature. is there.

According to this sanitary cleaning device, when the temperature of the mixed water supplied by the hot water mixing device is higher than a predetermined range, it can be identified that there is a problem in the water supply. From this, it can be estimated that there is a high possibility that the water supply solenoid valve is out of order, for example.

In the second invention, in the first invention, the control unit notifies that there is a problem when the second temperature is not lowered from the first temperature, and discharges water from the nozzle. It is a sanitary cleaning device characterized by being prohibited.

According to this sanitary cleaning device, it is possible to notify the user of the failure. In addition, it is possible to prevent hot water from being discharged to the user and wasteful drainage of hot water.

In the third invention, in the first or second invention, the control unit closes the water supply electromagnetic valve when the first temperature measured after the drainage control is lower than the range. After that, if the third temperature of the mixed water measured by the temperature measuring means does not rise from the first temperature, it is notified that there is a problem and that only water is discharged from the nozzle. It is a sanitary cleaning device characterized by.

According to this sanitary cleaning device, it is possible to notify the user of the failure. In addition, since it is possible to notify the user that only water is discharged from the nozzle, the user can be made to choose to use the cleaning function.

The fourth invention further includes an operation unit for the user to operate the water discharge by the nozzle in any one of the first to third inventions, and the control unit gives the user an instruction to start water discharge. If it is not prohibited to flow the mixed water through the nozzle when inputting to the operation unit, the switching electromagnetic valve is set to flow the mixed water through the nozzle, and the switching electromagnetic valve causes the mixed water to flow through the nozzle. A sanitary cleaning device characterized in that a part of the mixed water is discharged from the nozzle and another part of the mixed water is drained to a toilet bowl in a state of flowing water.

In this sanitary cleaning device, when the mixed water is discharged from the nozzle, the total amount of the water supplied from the water supply pipe and the hot water supplied from the hot water supply pipe is the amount of the mixed water discharged from the nozzle. More than quantity. Therefore, a part of the mixed water is drained to the toilet bowl. In such a sanitary cleaning device, wasteful use of hot water and water can be suppressed by identifying which of the water supply and the hot water supply is defective.

According to the aspect of the present invention, there is provided a sanitary cleaning device that makes it easy to identify the cause of a defect when the temperature of the mixed water of hot water and water is not an appropriate temperature.

It is a perspective view which shows the toilet apparatus provided with the sanitary cleaning apparatus which concerns on embodiment of this invention. It is a top view which illustrates the inside of the sanitary cleaning apparatus which concerns on embodiment. It is a block diagram which illustrates the sanitary cleaning apparatus which concerns on embodiment. It is a flowchart which illustrates the operation of the sanitary cleaning apparatus which concerns on embodiment. It is a flowchart which illustrates the operation of the sanitary cleaning apparatus which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.
FIG. 1 is a perspective view showing a toilet device provided with a sanitary cleaning device according to an embodiment of the present invention.
The toilet device shown in FIG. 1 includes a Western-style seated toilet (hereinafter, simply referred to as a “toilet” for convenience of explanation) 800, and a sanitary cleaning device 100 provided on the Western-style seat toilet (hereinafter simply referred to as “toilet”) 800. The sanitary cleaning device 100 includes a casing 400, a toilet seat 200, a toilet lid 300, and an operation unit 500. The toilet seat 200 and the toilet lid 300 are pivotally supported with respect to the casing 400 so as to be openable and closable.

Here, in the specification of the present application, the upper part is referred to as "upper" when viewed from the user sitting on the toilet seat 200, and the lower part is referred to as "lower" when viewed from the user sitting on the toilet seat 200. Further, the front is referred to as "front" when viewed from the user sitting on the toilet seat 200 with his back to the toilet lid 300 in the open state, and the rear is referred to as "rear" when viewed from the user sitting on the toilet seat 200. Further, the right side when viewed from the user sitting on the toilet seat 200 is referred to as the "right side", and the left side when viewed from the user sitting on the toilet seat 200 is referred to as the "left side".

Inside the casing 400, there is a built-in local cleaning function unit that realizes cleaning of the "buttocks" of the user sitting on the toilet seat 200. Further, for example, the casing 400 includes an entry detection sensor 402 (human body detection means) for detecting the entry of a user into the toilet room, a human body detection sensor 403 (human body detection means) for detecting a user in front of the toilet seat 200, and the like. A seating detection sensor 404 (human body detecting means) for detecting the seating of the user on the toilet seat 200 is provided.

The operation unit 500 is used by the user to operate the water discharge by the nozzle 473. For example, when the seating detection sensor 404 detects a user sitting on the toilet seat 200, when the user operates an operation unit 500 (operation switch) such as a remote controller, the nozzle 473 (cleaning nozzle) is used as a bowl of the toilet bowl 800. You can advance into 801. Note that FIG. 1 shows a state in which the nozzle 473 has advanced into the bowl 801. The advancement and retreat of the nozzle 473 is performed by any means. For example, water pressure and spring urging force can be used.

One or more spouts 474 are provided at the tip of the nozzle 473. The nozzle 473 can inject water or hot water from the spout 474 to wash the "buttocks" of the user sitting on the toilet seat 200.

As the seating detection sensor 404, for example, an infrared light emitting / receiving type ranging sensor can be used. The seating detection sensor may be a contact type switch such as a tact switch. As the human body detection sensor 403, for example, an infrared light emitting / receiving type ranging sensor can be used. As the entry detection sensor 402, for example, a pyroelectric sensor, a microwave sensor such as a Doppler sensor, or the like can be used.

FIG. 2 is a plan view illustrating the inside of the sanitary cleaning device according to the embodiment.
FIG. 2 shows the inside of the casing 400. In FIG. 2, only a part of the elements in the casing 400 is shown for ease of viewing. The sanitary cleaning device 100 includes a water supply pipe 91, a hot water supply pipe 92, a water supply solenoid valve 16, a hot water supply solenoid valve 26, a hot water mixing device 30 (mixing valve), a switching solenoid valve 150 (switching valve unit), and a nozzle. A unit 470 and a control unit 480 are included. These are arranged on the case plate 401 of the casing 400. The case plate 401 has a dish shape or a plate shape extending in a substantially horizontal direction. The case plate 401 may appropriately have a portion inclined with respect to the horizontal direction for drainage or the like.

The control unit 480 is a control circuit (microcomputer) including an IC element and the like. The control unit 480 controls the operation of each element of the sanitary cleaning device 100. For example, the control unit 480 controls the operations of the water supply solenoid valve 16, the hot water supply solenoid valve 26, the switching solenoid valve 150, the human body detecting means, and the like.

FIG. 3 is a block diagram illustrating the sanitary cleaning device according to the embodiment. FIG. 3 shows a flow path in the sanitary cleaning device 100.
As shown in FIG. 3, the water supply pipe 91 is connected to a water supply source (not shown) such as a water supply or a water storage tank via a water side piping portion 14. As a result, water is supplied to the water supply pipe 91. The water-side piping portion 14 has a strainer 11, a check valve 12 provided on the downstream side of the strainer 11, and a water stop valve 13 provided on the downstream side of the check valve 12. The downstream end of the water supply pipe 91 is connected to the water supply solenoid valve 16. A hot water mixing device 30 is provided on the downstream side of the water supply solenoid valve 16. The water supply solenoid valve 16 opens and closes the flow path from the water supply pipe 91 to the hot water mixing device 30. That is, by opening and closing the water supply solenoid valve 16, it is possible to switch between a state in which water is supplied to the hot water mixing device 30 and a state in which the water supply is stopped. A valve or the like for adjusting the pressure of water may be provided between the water supply pipe 91 and the hot water mixing device 30.

On the other hand, the hot water supply pipe 92 is connected to a hot water supply source (not shown) such as a heating device via the hot water side piping portion 24. As a result, hot water is supplied to the hot water supply pipe 92. The hot water side piping portion 24 has a strainer 21, a check valve 22 provided on the downstream side of the strainer 21, and a water stop valve 23 provided on the downstream side of the check valve 22. The downstream end of the hot water supply pipe 92 is connected to the hot water supply solenoid valve 26. A hot water mixing device 30 is provided on the downstream side of the hot water supply solenoid valve 26. The hot water supply solenoid valve 26 opens and closes the flow path from the hot water supply pipe 92 to the hot water mixing device 30. That is, by opening and closing the hot water supply solenoid valve 26, it is possible to switch between a state in which hot water is supplied to the hot water mixing device 30 and a state in which the supply of hot water is stopped. A valve for adjusting the pressure of hot water may be provided between the hot water supply pipe 92 and the hot water mixing device 30.

The hot water mixing device 30 mixes the supplied hot water and water to generate mixed water. As a result, hot water (mixed water) having an appropriate temperature can be supplied to the downstream side and can be ejected from the nozzle 473.

In this example, the hot water mixing device 30 is provided with a temperature detecting means. As a result, the hot water mixing device 30 can automatically adjust the temperature of the mixed water. For example, the hot water mixing device 30 is a wax type temperature control valve that uses a wax element as a temperature detecting means. In the embodiment, the hot water mixing device 30 is not limited to the wax type temperature control valve, and any hot water mixing valve can be used.

The hot water mixing device 30 is adjusted to generate mixed water having a temperature in a predetermined range. This predetermined range is based, for example, on the temperature at which the user can comfortably use the cleaning function. The predetermined range is, for example, 32.5 ° C. or higher and 45 ° C. or lower.

A thermistor 41 (temperature measuring means) is provided on the downstream side of the hot water mixing device 30. The thermistor 41 measures the temperature of the mixed water produced by the hot water mixing device 30. A switching solenoid valve 150 is provided on the downstream side of the thermistor 41. A safety valve or the like may be appropriately provided between the hot water mixing device 30 and the switching solenoid valve 150.

The switching solenoid valve 150 is provided at a branch portion of the flow path of the mixed water included in the sanitary cleaning device 100. The flow path of the mixed water includes a nozzle-side water channel 55 and a drainage section 81 (disposal water channel). The nozzle-side water channel 55 and the drainage portion 81 are provided on the downstream side of the switching solenoid valve 150, respectively, and branch from the portion where the switching solenoid valve 150 is provided.

The switching solenoid valve 150 switches between a state in which the mixed water flows through the nozzle 473 and a state in which the mixed water flows through the drainage unit 81. That is, by opening / closing the switching solenoid valve 150, the state in which the mixed water flows to the nozzle-side water channel 55 and the state in which the mixed water flows to the drainage portion 81 are switched. The mixed water does not have to flow into both the nozzle-side water channel 55 and the drainage section 81 at the same time.

The mixed water flowing to the drainage portion 81 is guided to the case plate 401 side as shown by the arrow A5 shown in FIG. 2, and is drained to the outside (for example, bowl 801) from the opening provided in front of the case plate 401. ..

For example, when the user uses the sanitary cleaning device 100, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are opened according to the output of the seating detection sensor 404. At this time, the flow path of hot water or mixed water, and the hot water remaining in the flow path may be cold. Further, the hot water mixing device 30 can adjust the temperature of the mixed water by flowing a predetermined amount or more of water and hot water through the hot water mixing device 30. Therefore, the temperature of the mixed water supplied from the hot water mixing device 30 may be low for the user immediately after the start of use by the user. Therefore, the sanitary cleaning device 100 discards a predetermined amount of mixed water into the drainage unit 81 after detecting the sitting of the human body. For example, in the hot water mixing device 30, the mixed water is flowed to the drainage section 81 until the mixed water reaches an appropriate temperature.

After that, for example, the flow path is switched by the switching solenoid valve 150 by operating the operation unit 500 when the user performs local cleaning. As a result, the mixed water flows to the nozzle-side water channel 55. The mixed water is supplied to the nozzle portion 470.

The nozzle portion 470 includes, for example, a flow rate switching valve, a flow rate switching valve (not shown), and a nozzle 473. The flow rate switching valve and the flow rate switching valve can adjust the water force at the nozzle 473 and switch the water discharge port 474 that discharges water.
As described above, hot water (mixed water) having an appropriate temperature can be ejected from the nozzle 473.

In the state where the switching solenoid valve 150 flows the mixed water through the nozzle 473, a part of the mixed water is discharged from the nozzle 473 and another part of the mixed water is drained to the toilet bowl (bowl 801). That is, in a state where the mixed water is discharged from the nozzle 473, the total amount of the amount of water supplied from the water supply pipe 91 and the amount of hot water supplied from the hot water supply pipe 92 is discharged from the nozzle 473. More than the amount of mixed water. As described above, the hot water mixing device 30 can stably adjust the temperature when the flow rate is equal to or higher than a predetermined amount. Even when the mixed water flows through the nozzle-side water channel 55, the flow rate in the hot water mixing device 30 is secured by draining a part of the mixed water to the toilet bowl. As a result, mixed water having an appropriate temperature can be ejected from the nozzle 473.

In the specification of the present application, the "mixed water" includes not only hot water in which water and hot water are mixed, but also water or hot water flowing downstream from the hot water mixing device 30. For example, when the solenoid valve fails and water or hot water is not supplied to the hot water mixing device 30, unmixed water or hot water flows downstream of the hot water mixing device 30. Even in such a case, in the present specification, the water or hot water flowing downstream of the hot water mixing device 30 is referred to as mixed water for convenience.

Next, the operation of the sanitary cleaning device according to the embodiment will be described.
FIG. 4 is a flowchart illustrating the operation of the sanitary cleaning device according to the embodiment.
When the user sits on the toilet seat 200 when the sanitary cleaning device 100 is in the standby state (step S101), the seating detection sensor 404 (seating detecting means) detects the user's seating (step S102: yes). The control unit 480 receives the detection result and proceeds to step S103. While the user is not seated (step S102: no), the sanitary cleaning device 100 is in a state of waiting for seating.

When the user's seating is detected, the control unit 480 goes into a standby state (step S104) if it has already been determined that there is a problem in water supply or hot water supply (step S103: yes). The malfunction of water supply or hot water supply is, for example, a failure of the water supply solenoid valve 16 or the hot water supply solenoid valve 26. The determination of this defect will be described later.

When the seating of the user is detected and it is not determined that there is a problem in water supply or hot water supply (step S103: no), the control unit 480 executes drainage control (steps S105 and S106).

In step S105, the control unit 480 drives the switching solenoid valve 150 to switch the flow path of the mixed water. That is, the control unit 480 switches the state of the switching solenoid valve 150 to a state in which the mixed water flows to the drainage unit 81. In step S106, the control unit 480 turns on (open state) each of the water supply solenoid valve 16 and the hot water supply solenoid valve 26. That is, the flow path from the water supply pipe 91 to the hot water mixing device 30 is opened, and the flow path from the hot water supply pipe 92 to the hot water mixing device 30 is opened.

By executing step S105 and step S106 (drainage control), the mixed water is drained to the bowl 801 via the drainage section 81. After the drainage of the mixed water is started, the thermistor 41 measures the temperature of the mixed water.

In step S107, the control unit 480 determines whether the temperature of the mixed water measured by the thermistor 41 is within a predetermined range (for example, 32.5 ° C. or higher and 45 ° C. or lower). When the temperature of the mixed water is within a predetermined range (step S107: yes), the control unit 480 is in the standby state (step S104). When the temperature of the mixed water is not within a predetermined range (step S107: no), the control unit 480 performs water supply failure determination control or hot water supply failure determination control.

The water supply failure determination control includes step S108 and process A. The hot water supply defect determination control includes step S109 and process B. Details of these controls will be described later with reference to FIG. By executing these controls, the control unit 480 can narrow down the cause when the temperature of the mixed water is out of the predetermined range. For example, it is possible to estimate the failure of the water supply solenoid valve 16 or the failure of the hot water supply solenoid valve 26.

When the user is seated and the control unit 480 is in the standby state (step S104), when the user inputs an instruction to start water discharge from the nozzle 473 to the operation unit 500, information regarding the instruction is sent to the control unit 480. Will be sent. Upon receiving this signal, the control unit 480 drives the switching solenoid valve 150 if water discharge from the nozzle 473 is not prohibited. As a result, the switching solenoid valve 150 is in a state where the mixed water flows to the nozzle 473. Then, the mixed water is ejected from the nozzle 473.

After that, when the user inputs an instruction to stop water discharge from the nozzle 473 to the operation unit 500, information regarding the instruction is transmitted to the control unit 480. Upon receiving this signal, the control unit 480 closes each of the water supply solenoid valve 16 and the hot water supply solenoid valve 26. After that, the control unit 480 switches the state of the switching solenoid valve 150 to a state in which the mixed water flows to the drainage unit 81.

FIG. 5 is a flowchart illustrating the operation of the sanitary cleaning device according to the embodiment.
FIG. 5 illustrates the details of the range R shown in FIG. With reference to FIG. 5, the water supply failure determination control and the hot water supply failure determination control of the control unit 480 will be described.

When the temperature measured by the thermistor 41 in step S107 described with reference to FIG. 4 is out of the predetermined range, the thermistor 41 tells the temperature of the mixed water after a predetermined time has elapsed from step S107 (or S106) (hereinafter, hereinafter. The first temperature (referred to as T1) is measured. This predetermined time is arbitrary, but is, for example, about 3 minutes. When the first temperature T1 is higher than a predetermined range (for example, 45 ° C.) (step S108: yes), the control unit 480 executes the process A. As shown in FIG. 5, the process A includes steps SA1 to SA5.

In step SA1, the control unit 480 turns off the hot water supply solenoid valve 26 (closed state). At this time, the water supply solenoid valve 16 remains ON (open state). That is, if the sanitary cleaning device 100 is normal, water is supplied to the hot water mixing device 30, but hot water is not supplied. In step SA2, the thermistor 41 measures the temperature of the mixed water (hereinafter, referred to as the second temperature T2) after a predetermined time has elapsed from step SA1. This predetermined time is arbitrary, but is, for example, about 3 minutes.

When the second temperature T2 is lower than the above-mentioned first temperature T1 (step SA2: yes), the control unit proceeds to step S104. In this case, the reason why the first temperature T1 was higher than the predetermined range was that, for example, the temperature of the water supplied from the water supply pipe 91 or the temperature of the hot water supplied from the hot water supply pipe 92 was higher than expected. That is. By opening the water supply solenoid valve 16 and closing the hot water supply solenoid valve 26, the temperature of the mixed water is lowered, so that it can be determined that no problem has occurred in the water supply. For example, it is not certain that the water supply solenoid valve 16 is out of order.

When the second temperature T2 does not decrease from the above-mentioned first temperature T1 (step SA2: no), the control unit 480 determines that there is a problem in water supply (step SA3). For example, it can be estimated that there is a high possibility that the water supply solenoid valve 16 is out of order (the water supply solenoid valve 16 does not open). Further, for example, damage to the water supply path upstream of the hot water mixing device 30 (water leakage), failure of the thermistor 41, failure of the control unit 480, and the like are assumed.

Strictly speaking, the range of "when the second temperature T2 is not lowered from the above-mentioned first temperature T1" is that even if the second temperature T2 is lowered from the first temperature T1. It may include the case where the difference is small (for example, the difference is 1 ° C. or less).

After that, the control unit 480 notifies that there is a problem in water supply (step SA4), and prohibits water discharge from the nozzle 473 (step SA5). The means for notifying the defect is arbitrary, and may be a means by light or a means by sound. For example, as a means for notifying a defect, a method of turning on or blinking an LED (light emitting diode) is used.

In this way, according to the sanitary cleaning device according to the embodiment, it is possible to notify the user of the failure on the water supply side. Further, by prohibiting the spouting of water from the nozzle 473, it is possible to prevent the hot water from being spouted to the user and to prevent the hot water from being unnecessarily drained.

On the other hand, when the temperature of the mixed water (first temperature T1) after a predetermined time has elapsed from step S107 (or S106) is lower than the predetermined range (for example, 32.5 ° C.) (step S109: yes), control The unit 480 executes the process B. As shown in FIG. 5, the process B includes steps SB1 to SB5.

In step SB1, the control unit 480 turns off (closed state) the water supply solenoid valve 16. At this time, the hot water supply solenoid valve 26 remains ON (open state). That is, if the sanitary cleaning device 100 is normal, hot water is supplied to the hot water mixing device 30 and no water is supplied. In step SB2, the thermistor 41 measures the temperature of the mixed water (hereinafter, referred to as the third temperature T3) after a predetermined time has elapsed from step SB1. This predetermined time is arbitrary, but is, for example, about 3 minutes.

When the third temperature T3 is lower than the above-mentioned first temperature T1 (step SB2: yes), the control unit proceeds to step S104. In this case, the reason why the first temperature T1 was lower than the predetermined range was that, for example, the temperature of the water supplied from the water supply pipe 91 or the temperature of the hot water supplied from the hot water supply pipe 92 was lower than expected. That is. By opening the hot water supply solenoid valve 26 and closing the water supply solenoid valve 16, the temperature of the mixed water rises, so that it can be determined that no problem has occurred in the hot water supply. For example, it is not certain that the hot water supply solenoid valve 26 is out of order.

When the third temperature T3 does not rise from the above-mentioned first temperature T1 (step SB2: no), the control unit 480 determines that there is a problem in hot water supply (step SB3). For example, it can be estimated that there is a high possibility that the hot water supply solenoid valve 26 is out of order (the hot water supply solenoid valve 26 does not open). Further, for example, damage to the hot water supply path upstream of the hot water mixing device 30 (hot water leakage), failure of the thermistor 41, failure of the control unit 480, and the like are assumed.

Strictly speaking, the range of "when the third temperature T3 does not rise from the above-mentioned first temperature T1" is that even if the third temperature T3 rises from the first temperature T1. It may include the case where the difference is small (for example, the difference is 1 ° C. or less).

After that, the control unit 480 notifies that there is a problem in the hot water supply (step SB4), and permits water discharge from the nozzle 473 (step SB5). When water discharge is permitted in step SB5, hot water is not supplied to the hot water mixing device 30 thereafter, and only water is discharged from the nozzle 473.

As described above, according to the sanitary cleaning device according to the embodiment, it is possible to notify the user of the failure on the hot water supply side. Further, it is possible to notify the user that only water is discharged from the nozzle 473. The user can select whether or not to use the cleaning function in consideration of the information that only water is discharged.

When the first temperature T1 is lower than the predetermined temperature in step S108 (step S108: no) and higher than the predetermined temperature in the subsequent step S109 (step S109: no), the control unit 480 steps again. Execute S107.

As described above, the control unit 480 performs water supply failure determination control and hot water supply failure determination control when the temperature of the mixed water is not an appropriate temperature. This makes it possible to determine whether there is a high possibility that a problem has occurred in the water supply or the hot water supply. For example, it is possible to estimate which of the water supply solenoid valve 16 and the hot water supply solenoid valve 26 is out of order. Therefore, it becomes easy to identify the cause of the defect.

Further, as already described, in the sanitary cleaning device having the hot water mixing device, a certain amount of water and hot water are discarded as in the drainage control (steps S105 and S106) for temperature adjustment. When the temperature of the mixed water is not within the predetermined range, a large amount of water and hot water is used when water and hot water are allowed to flow for a predetermined time each time for temperature adjustment. Further, even in the water discharge of the nozzle 473, a part of the mixed water is drained to the toilet bowl in order to secure the flow rate, and a certain amount of water and hot water are used. Therefore, it is desirable to control the amount of hot water and water used.

On the other hand, in the embodiment, when there is a problem in water supply as described with respect to step SA5, the discharge of water from the nozzle 473 is prohibited. Further, as described with respect to step S103, when it is determined that there is a problem in water supply or hot water supply, steps S105 to S109 are omitted. By determining the problem of water supply or hot water supply in this way, wasteful use of hot water and water can be suppressed.

The embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. With respect to the above-described embodiment, those skilled in the art with appropriate design changes are also included in the scope of the present invention as long as they have the features of the present invention. For example, the shape, dimensions, material, arrangement, installation form, etc. of each element provided in the water supply pipe, hot water supply pipe, hot water mixing device, nozzle, solenoid valve, operation unit, control unit, drainage unit, etc. are limited to the examples. It does not mean that it can be changed as appropriate.
In addition, the elements included in each of the above-described embodiments can be combined as much as technically possible, and the combination thereof is also included in the scope of the present invention as long as the features of the present invention are included.

11 Toilet, 12 Check valve, 13 Water stop valve, 14 Water supply solenoid valve, 16 Water supply solenoid valve, 21 Strainer, 22 Check valve, 23 Stop valve, 24 Hot water side piping section, 26 Hot water supply solenoid valve, 30 Hot water Mixing device, 41 Thermista, 55 Nozzle side water channel, 81 Drainage section, 91 Water supply pipe, 92 Hot water supply pipe, 100 Sanitary cleaning device, 150 Switching solenoid valve, 200 Toilet seat, 300 Toilet lid, 400 Casing, 401 Case plate, 402 Entry detection Sensor, 403 Human body detection sensor, 404 Seating detection sensor, 470 nozzle part, 473 nozzle, 474 spout, 480 control part, 500 operation part, 800 toilet bowl, 801 bowl

Claims (4)

The water supply pipe to which water is supplied and
The hot water supply pipe to which hot water is supplied and
A hot water mixing device that produces mixed water by mixing the water supplied to the water supply pipe and the hot water supplied to the hot water supply pipe.
A nozzle that discharges mixed water toward a local part of the human body,
A drainage unit that drains mixed water and
A water supply solenoid valve that opens and closes the flow path from the water supply pipe to the hot water mixing device,
A hot water supply solenoid valve that opens and closes the flow path from the hot water supply pipe to the hot water mixing device.
A switching solenoid valve that switches between a state in which mixed water flows through the nozzle and a state in which the mixed water flows through the drainage portion.
A control unit that controls the water supply solenoid valve, the hot water supply solenoid valve, and the switching solenoid valve,
Toilet seat and
A seating detection means for detecting the seating of the user on the toilet seat, and
A temperature measuring means for measuring the temperature of mixed water and
With
The control unit
When the seating detecting means detects the seating of the user, the drainage control is executed to open each of the water supply solenoid valve and the hot water supply solenoid valve and switch the switching solenoid valve to a state in which mixed water flows to the drainage portion. ,
When the first temperature of the mixed water measured by the temperature measuring means after the drainage control is higher than a predetermined range, the hot water supply electromagnetic valve is closed, and then the mixing measured by the temperature measuring means is performed. A sanitary cleaning device comprising prohibiting the flow of mixed water through the nozzle when the second temperature of water is not lowered from the first temperature. Wherein, when said second temperature is not reduced from the first temperature, along with notifying that there is a problem, according to claim 1, characterized in that prohibiting water discharge from the nozzle Sanitary cleaning equipment. When the first temperature measured after the drainage control is lower than the range, the control unit closes the water supply electromagnetic valve, and then closes the mixed water measured by the temperature measuring means. The sanitary cleaning apparatus according to claim 1 or 2, wherein when the temperature of No. 3 does not rise from the first temperature, it is notified that there is a problem and that only water is discharged from the nozzle. .. An operation unit for the user to operate the water discharged by the nozzle is further provided.
When the user inputs a water discharge start instruction to the operation unit, the control unit causes the mixed water to flow through the nozzle through the switching solenoid valve if the mixing water is not prohibited from flowing through the nozzle. State and
Claim 1 is characterized in that, in a state where the switching solenoid valve allows mixed water to flow through the nozzle, a part of the mixed water is discharged from the nozzle and another part of the mixed water is drained to the toilet bowl. The sanitary cleaning device according to any one of 3 to 3.

Images