JP2010203162A - Water leakage detector for warm water washing toilet seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem in a warm-water washing toilet seat in which water is stored at a predetermined water level in the warm-water tank with an electromagnetic value opened/closed by detection of a water-level detector that, when the water is leaked from the warm-water tank and when the water is leaked from piping between the electromagnetic value and the warm-water tank, the rate of lowering of the warm-water level in the warm-water tank is much faster than the rate in the case when the level naturally lowers, which results in frequent turning on/off the electromagnetic value and thereby causing, while deteriorating durability of the electromagnetic value, frequent supplies of running water into the warm tank to lower the temperature of the warm water and to prolong heating time by a heater, and thus it is undesirable in view of energy-saving. <P>SOLUTION: When the interval between water supply operations by the electromagnetic valve 11 is shorter than a reference interval between the water supply operations, the water leakage detector determines the occurrence of the water leakage by a control unit and provides a predetermined notification by operating a notification part based on its determination output. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a warm water washing toilet seat in which tap water supplied through a water conduit connected to a tap water pipe is heated by a warm water tank and ejected from a washing nozzle to wash a part of a person seated on the toilet seat, In particular, the present invention relates to a water leakage detection device that detects water leakage from a pipe through which tap water is supplied to a hot water tank.

A hot water tank with a built-in heater is provided to store hot water for the hot water toilet seat. This hot water tank is supplied with tap water through an electromagnetic valve and a pressure reducing valve, and injects hot water in the hot water tank from the washing nozzle. It is well known that it is used for local washing of anus, bidet and the like. (For example, refer to Patent Document 1).

JP 2001-98615 A

In the form of this patent document 1, at the time of washing the butt or bidet, by opening the electromagnetic valve and supplying the tap water into the hot water tank, the tap water pressure applied through the hot water tank
A butt washing nozzle or a bidet washing nozzle is advanced, and hot water is ejected from the nozzle opening at the tip.

The hot water temperature in the hot water tank can be set to an arbitrary temperature such as approximately 40 ° C. by the setting switch by the user in order to control the heating amount by the heater. When the warm water washing seat is not used for a long time, the warm water level is lowered by natural evaporation of the warm water thus heated. This is because the evaporated steam adheres to the upper wall of the hot water tank, and when the air flows into the hot water tank through a negative pressure valve provided for safety in the hot water tank, the evaporated steam in the hot water tank By being discharged to the outside.

The hot water level (water level) in the hot water tank is detected by a float switch that moves up and down according to the hot water level, and when it reaches a predetermined lower limit level, the solenoid valve is opened to supply tap water into the hot water tank. Then, when the predetermined upper limit level is reached, the solenoid valve is closed.
When there is no water leakage from the hot water tank or the piping from the solenoid valve to the hot water tank, the hot water level naturally decreases due to the evaporation described above, and it takes a long time to decrease to the lower limit level. However, if there is water leakage from the hot water tank or water leakage from the piping from the solenoid valve to the hot water tank, the rate of decrease in the warm water level (water level) in the warm water tank is the warm water level ( The water level is much faster than the rate of decrease, and the solenoid valve is frequently turned ON / OFF.

For this reason, a decrease in the durability of the solenoid valve becomes a problem, and since tap water is frequently supplied into the hot water tank, the temperature of the hot water decreases and the heating time by the heater becomes longer, which is preferable from the viewpoint of energy saving. There will be no situation. In view of the above, the present invention provides a technique for promptly detecting water leakage and prompting for repairs, etc., and preventing deterioration of the durability of the solenoid valve and improving energy saving. .

According to a first aspect of the present invention, there is provided a hot water tank for heating tap water supplied by a water supply pipe by a sheathed heater, a water level detector for detecting a water level in the hot water tank, and supplying the tap water by opening and closing the water supply pipe. In a warm water washing toilet seat that opens and closes the solenoid valve by detecting the water level of the water level detector and accumulates water at a predetermined water level in the hot water tank, the electromagnetic valve is controlled against a reference water supply operation interval. When the water supply operation interval by the valve is short, the controller determines that the water leaks,
According to the determination output, the notification unit is operated to perform predetermined notification.

According to a second aspect of the present invention, there is provided a hot water tank for heating tap water supplied by a water supply pipe by a sheathed heater, a water level detector for detecting a water level in the hot water tank, and supplying the tap water by opening and closing the water supply pipe. The number of times of water supply in a predetermined time in a warm water washing toilet seat that opens and closes the electromagnetic valve by the water level detection of the water level detector to supply water in the hot water tank and collect water at a predetermined water level. When the number of times is equal to or greater than the predetermined number of times, the controller determines that the water leaks, and operates the notification unit according to the determination output to perform predetermined notification.

According to a third aspect of the present invention, in the first aspect of the invention, the water supply operation interval is set to the time until the water level detector detects the upper limit water level and again detects the upper limit water level, or the water level detector detects the lower limit water level and again the lower limit water level. It is characterized by the time until detection of.

According to the present invention, when water leaks from the hot water tank, or when water leaks from the piping from the solenoid valve to the hot water tank, the rate of decrease in the hot water level (water level) in the hot water tank is the hot water level in the natural decline. Since it is much faster than the (water level) decrease rate, water leakage can be detected by detection based on the water supply operation interval by the solenoid valve, detection by the decrease rate of the hot water level, and detection by the number of water supply operations by the solenoid valve within a predetermined time. It is possible to cope with water leakage promptly. In addition, by setting the water supply operation interval at which the solenoid valve performs the water supply operation as the time interval at which the water level detector detects the upper limit water level, or the time interval at which the water level detector detects the lower limit water level,
It becomes easy to detect water leakage.

It is the perspective view which attached the warm water washing toilet seat which concerns on this invention to the toilet bowl. It is a top view which shows the internal structure of the main body case and operation part of the warm water washing toilet seat of FIG. It is a control circuit diagram of the warm water washing toilet seat which concerns on this invention. It is a side perspective view of the state which combined nozzle unit NU and washing water change unit SU concerning the present invention. It is a back perspective view of the state which combined nozzle unit NU and washing water change unit SU concerning the present invention. It is sectional drawing which cut | disconnects the state which attached the washing water switching unit which concerns on this invention to the lower surface of a warm water tank in the up-down direction, and shows the one part by an expansion. It is sectional drawing which cut | disconnects the nozzle unit NU which concerns on this invention in an up-down direction, and shows the one part enlarged. It is a disassembled perspective view of the washing water switching unit SU which concerns on this invention. It is a block diagram of the float switch which is a water level detector which concerns on this invention. It is a time chart explaining the water leak detection which concerns on this invention.

[Example 1]
An embodiment of the present invention will be described with reference to FIG. 1. Reference numeral 1 denotes a warm water washing toilet seat which is detachably installed on a Western-style toilet bowl 2 and covers a rear portion of the toilet seat 4 and an upper surface of the toilet seat 4 on a main body case 3. The rear portion of the toilet lid 5 is axially supported, and pivotally supports the toilet seat 4 and the toilet lid 5 so as to be opened and closed in the vertical direction. A water supply pipe 6 protrudes from one side surface of the main body case 3, and a flexible pipe hose 7 is connected to the water supply pipe 6, and the pipe hose 7 supplies clean water via a branch tap 8. It is connected to a water supply pipe 9 such as city water to be supplied.

The main body case 3 integrally projects on one side thereof an operation portion 10 that extends forward along the side surface of the toilet seat 4, and the operation portion 10 constitutes a part of the main body case 3. . The operation unit 10 houses a plurality of switches to be described later operated from the upper surface of the operation unit 10 and LEDs serving as a display unit for displaying an operation state by the switches. The illustrated one has a configuration in which the operation unit 10 is arranged on the side of the toilet seat 4, but when the operation is a remote control system,
The operation unit 10 is a remote controller.

In the configuration shown in the figure, in the main body case 3, as shown in FIG. 2, hot water for cleaning a portion to be cleaned such as an anus or a bidet of a person seated on the toilet seat 4 is created as a main functional component. A hot water tank 13, a water supply pipe 14 connecting the hot water tank 13 and the water supply pipe 6, an electromagnetic valve 11 connected to the water supply pipe 14, a pressure reducing valve 12 connected to the water supply pipe 14, a hot water washing unit 60, A deodorizing mechanism 16 and a substrate 17 to which an electric control circuit is attached are accommodated. The main body case 3 accommodates electric motors 19 and 20 that open and close the toilet seat 4 and the toilet lid 5 in the vertical direction. When the electromagnetic valve 11 is opened in the hot water tank 13, the clean water of the water supply pipe 9 is supplied to the bottom of the hot water tank 13 through the pipe hose 7 and the water supply pipe 14. The water supplied to the hot water tank 13 becomes hot water by the hot water heater 42 disposed in the hot water tank 13.

The deodorizing mechanism 16 is mainly configured by a deodorizing catalyst 24, a deodorizing fan 25, and a fan case 26. The fan case 26 is opened to face the bowl 2A of the Western-style toilet 2, and a first intake hole 27 is opened. And a second intake hole 28 opened in the main body case 3 and an exhaust hole 29 through which the air sucked from these intake holes passes through the deodorizing catalyst 24 and is discharged outside the main body case 3. Yes.

As shown in a partial cross section in FIG. 1, the toilet seat 4 is provided with a toilet seat heater 41 that is insulated and coated on the back side of the toilet seat 4 with an aluminum foil 4 </ b> A, and the toilet seat 4 is heated by the heat generated by the toilet seat heater 41. Is done.

As shown in a partially enlarged view in FIG. 2, the operation unit 10 accommodates an insulating operation board 18 in a horizontal state. Various operation switches and an LED display unit are attached to the operation board 18. It has been. As the operation switches, a buttocks (anal) washing start switch 45, a bidet washing start switch 46, a washing stop switch 44, washing water flow increase / decrease switches 47P and 47Q, a hot water temperature adjustment switch 48 in the hot water tank 13, and a toilet seat by the toilet seat heater 41 And a toilet seat temperature adjustment switch 49 that can change the temperature of the LED 2, and an LED display unit that displays, as an LED display unit, three states of water strength increase / decrease switches 47P and 47Q corresponding to the water pressure increase / decrease switches 47P and 47Q, Corresponding to the adjustment switch 48, an LED 48L for displaying the hot water temperature in three stages of low, medium and high, and an LED 49L for displaying the toilet seat temperature in three stages of low, medium and high corresponding to the toilet seat temperature adjustment switch 49 are provided. The electric motors 19 and 20 for opening and closing the toilet seat 4 and the toilet lid 5 in the vertical direction are turned on.
The switches 23 and 43 to be turned off and the pressing portions thereof are provided in the operation unit 10 like the operation switches.

The upper surface opening of the operation unit 10 is covered with a cover plate in which through holes are formed in the corresponding portions of the switches and LEDs, and the upper surface of the cover plate corresponds to these switches so as to close the through holes. A portion has flexibility, and a portion corresponding to the LED is covered with a translucent film 10F. Therefore, these switches 44, 45, 46, 47P and 47
By pressing the pressing portions 44A, 45A, 46A, 47A and 47B, 48A, 49A of the film 10F corresponding to Q, 48, 49, the corresponding switches are activated. Electric motor 19
The switches 23 and 43 for turning ON / OFF 20 are the same.

As a warm water heater 42 for heating the water in the warm water tank 13, a sheathed heater 42 that generates heat when energized is disposed at the bottom of the warm water tank 13. On the upper wall of the hot water tank 13,
The temperature detection unit 50 that detects an abnormal temperature in the hot water tank 13 and interrupts the energization circuit to the sheathed heater 42, and the open / close control of the solenoid valve 11 by detecting the hot water level (wash water level) in the hot water tank 13 Then, the water level detector 51 that controls the hot water level (wash water level) in the hot water tank 13 to a predetermined level and the inside of the hot water tank 13 communicate with the outside air when the pressure in the hot water tank 13 becomes lower than the outside air pressure. Attaching portion 5 of an atmospheric pressure adjusting pipe 53 provided with a negative pressure valve 52
4 is provided. In the embodiment, the water level detector 51 is indicated by a float switch 51. The hot water tank 13 has an airtight structure so as not to communicate with the outside air except that it communicates with the outside air by the action of the negative pressure valve 52. Further, the warm water temperature in the warm water tank 13 can be set to an arbitrary set temperature by the user using the warm water temperature adjustment switch 48 in the warm water mode. A thermistor 55 for detecting the hot water temperature in the hot water tank 13 is provided to control the energization of the sheathed heater 42 in the hot water mode and maintain the hot water temperature in the hot water tank 13 at the set temperature.

The warm water cleaning unit 60 includes a buttocks cleaning nozzle 61, a bidet cleaning nozzle 62, a buttocks cleaning nozzle nozzle case 63 that accommodates the buttocks cleaning nozzle 61 so as to advance and retract, and a bidet cleaning nozzle 62 that advances and retracts. Switching between switching a nozzle unit NU provided with a nozzle case 64 for a bidet cleaning nozzle accommodated so as to perform an operation, and whether to supply hot water supplied from the hot water tank 13 to the wet cleaning nozzle 61 or the bidet cleaning nozzle 62 The washing water switching unit SU is provided with a valve 66.

Specifically, the nozzle unit NU has a bidet cleaning nozzle 6 directly below the buttocks cleaning nozzle 61.
2 are accommodated in a bottom case nozzle nozzle case 63 and a bidet washing nozzle nozzle case 64 so as to be positioned on a substantially parallel line, and are advanced by tap water pressure applied to the hot water tank 13 as will be described later. It is the structure which operate | moves and ejects warm water from the nozzle openings 61A and 62A of a front-end | tip part. The butt washing nozzle nozzle case 63 and the bidet washing nozzle nozzle case 64 are integrally formed of synthetic resin to form a nozzle case body NC.

The buttocks cleaning nozzle 61 is made of a synthetic resin and has a cylindrical shape such as a cylindrical shape. In the internal passage 61T through which hot water as cleaning water passes, the pressure of the cleaning water gradually increases toward the nozzle port 61A at the tip. Thus, the cross-sectional area S1 is formed so as to gradually decrease toward the tip. The bidet cleaning nozzle 62 is made of a synthetic resin and has a cylindrical shape such as a cylindrical shape like the buttocks cleaning nozzle 61, and the internal passage 62 </ b> T through which hot water as cleaning water passes is a nozzle port 62 at the tip.
The cross-sectional area S2 is gradually reduced toward the tip so that the pressure of the cleaning water gradually increases toward A. Butt cleaning nozzle 61 and bidet cleaning nozzle 62
Since a common cylindrical nozzle configuration can be adopted except for the tip of the nozzle by making the nozzle case 63 for the buttocks cleaning nozzle and the nozzle case 64 for the bidet cleaning nozzle common, it is possible to share parts as a whole. As a result, the assembly can be facilitated and the cost can be reduced.

At the rear end of the nozzle unit NU, hot water supplied from the cleaning water switching unit SU is introduced into the hot water introducing portion 63B that is introduced into the buttocks washing nozzle nozzle case 63 and the bidet washing nozzle nozzle case 64. The hot water introduction part 64B is formed. Specifically, the introduction part cover 86 formed with the warm water introduction part 63B and the warm water introduction part 64B, and the introduction part cover 8
An attachment member 87 is attached to the rear end of the nozzle case body NC with screws 88 so as to cover 6. Thereby, the inlet opening at the rear end of the nozzle case 63 for the buttocks cleaning nozzle is
The hot water introducing portion 63B is in communication with the inlet opening at the rear end of the bidet cleaning nozzle nozzle case 64, and the hot water introducing portion 64B is in communication.

The attachment member 87 is formed with an attachment portion 87A for fixing the nozzle unit NU to a fixed substrate (not shown) in the main body case 3 with screws 89. If a portion to be fixed to the fixed substrate with the screw 89 can be formed in the introduction portion cover 86, the attachment member 87 is not necessary.

In the bowl 2A of the western-style toilet 2, both the upper and lower posterior washing nozzles 61 and the bidet washing nozzle 62 are arranged so as to advance and retreat toward the front diagonally downward, and the toilet seat 4 and the toilet lid 5 are disposed in the main body case 3. In the state of attaching, the buttocks washing nozzle 61 and the bidet washing nozzle 62 are arranged on the center line in the front-rear direction, which is the center line between the left and right sides of the toilet seat 4. For this reason, the toilet seat 4 and the toilet lid 5
In a state where the main body case 3 attached with the urine is set at a predetermined position on the western toilet 2, a hot water jet from right below or just below the rear part of the person to be cleaned such as an anus or bidet of the person sitting on the toilet seat 4 can get.

For this reason, in the state where the tap water pressure is not applied, the buttocks cleaning nozzle 61 is kept in the retracted state in the buttocks cleaning nozzle nozzle case 63 by the coil spring 65A.
When the tap water pressure is applied, the tap water pressure is received by the water receiving portion 61B of the annular flange formed at the rear end of the butt washing nozzle 61, and the butt washing nozzle 61 advances while compressing the coil spring 65A. The packing 61P attached to the portion 61B comes into contact with the stop portion 63A in the nozzle case 63 for the cleaning nozzle, and its advancement stops, and this position becomes a predetermined advance position.

On the other hand, when the tap water pressure is not applied to the bidet cleaning nozzle 62, the bidet cleaning nozzle 62 is kept in the bidet cleaning nozzle nozzle case 64 by the coil spring 65B, and the tap water pressure is applied. The above-mentioned tap water pressure is the bidet washing nozzle 6
2, the bidet cleaning nozzle 62 advances while compressing the coil spring 65 </ b> B, and the packing 62 </ b> P attached to the water receiving portion 62 </ b> B is placed in the nozzle case 64 for the bidet cleaning nozzle. The stop portion 64A comes into contact with the stop portion 64A to stop its advancement, and this position becomes a predetermined advance position.

The washing water switching unit SU includes an electric motor 67 that rotationally drives the switching valve 66, a synthetic resin valve chamber member 70 that forms a valve chamber 69 that houses the switching valve 66, and a buttocks washing water that is switched by the switching valve 66. A synthetic resin switching passage member 73 in which the passage 71 and the bidet washing water passage 72 are formed is joined and integrated by a screw 74. As a result, the valve chamber 69 is kept in a watertight state.

In order to derive the hot water in the hot water tank 13, a hot water outlet pipe 15 erected substantially vertically in the hot water tank 13 is provided. The upper end opening 15 </ b> A (the hot water outlet of the hot water tank 13) of the hot water outlet pipe 15 is located with a slight gap between the upper wall of the hot water tank 13. In the illustrated example, the upper wall in the hot water tank 13 is slightly swelled upward, and the upper end opening 15A is located near the upper wall. When the solenoid valve 11 is opened in the hot water tank 13, the clean water of the water supply pipe 9 is supplied to the bottom of the hot water tank 13 through the pipe hose 7 and the water supply pipe 14, and heated by the hot water heater 42. It becomes. The hot water level (wash water level) in the hot water tank 13 is controlled to open and close the solenoid valve 11 based on the detection of the float switch 51.
The hot water level (wash water level) in the hot water tank 13 is controlled to a predetermined level. This predetermined level is slightly lower than the upper end opening 15A of the hot water outlet pipe 15 (the hot water outlet of the hot water tank 13).

As will be described later, when the cleaning mode is set, hot water in the hot water tank 13 is spouted from the buttocks cleaning nozzle 61 or the bidet cleaning nozzle 62 while supplying clean water to the hot water tank 13 into the hot water tank 13. In this case, the clean water which is not warm water is the buttocks washing nozzle 61 or the bidet washing nozzle 6.
The hot water outlet pipe 15 is erected so as not to eject from 2.

The switching valve 66 is supported by the drive shaft 68 of the electric motor 67 and accommodated in the valve chamber 69 so as to perform forward / reverse rotation on the horizontal axis. The valve chamber member 70 is connected to a hot water introduction port 69B formed in an upper wall of the valve chamber member 70 at a lower end of the hot water outlet pipe 15 so that the hot water flowing down in the hot water outlet pipe 15 flows from the hot water introduction port 69B to the valve chamber. Flows into 69.

The drive shaft 68 of the electric motor 67 may be formed only by the shaft 68 </ b> A extending from the rotor of the electric motor 67. However, due to the versatility of the electric motor 67, the drive shaft 68 of the electric motor 67 extends from the rotor of the electric motor 67. The shaft 68A is composed of a synthetic resin auxiliary shaft 68B fitted and integrated therewith. As shown in FIG. 6, the drive shaft 68 of the electric motor 67 penetrates the switching passage member 73 in a sealed state by a seal packing 76 so that hot water does not leak, and a switching valve 66 is attached to the tip of the switching passage member 73. The electric motor 67 performs a stepping operation by a pulse output of the control circuit 30 described later, and is also referred to as a stepping motor.

In consideration of ease of assembly and repair / replacement, the switching valve 66 is provided with the drive shaft 6 of the electric motor 67.
8 is attached by fitting from the left side in FIG. 6 (from the right side in FIG. 8). The flow of hot water switched by the switching valve 66 is switched between a state in which the valve passage 66A penetrating the switching valve 66 communicates with the buttocks washing water passage 71 and a state in which the valve passage 66A communicates with the bidet washing water passage 72. The switching valve 66 needs to be pressed against the switching passage member 73. For this reason, in order that the switching valve 66 can be rotated and its support is stabilized, a configuration is adopted in which the switching valve 66 is held toward the drive shaft 68 by the pressing force of the coil spring 79. Specifically, the opposite side of the switching valve 66 from the driving shaft 68 is a support shaft 77 protruding in the direction of the driving shaft 68 from the side wall of the valve chamber 69 (the left wall of the valve chamber member 70 in FIG. 6), and the switching valve. The switching valve 66 is held with a pressing force toward the drive shaft 68 by a coil spring 79 loosely fitted to the support shaft 78 protruding from the 66, and the forward / reverse rotation operation by the electric motor 67 is smooth. It is the structure performed to.

As described above, the washing water switching unit SU has a configuration in which the electric motor 67, the valve chamber member 70, and the switching passage member 73 are coupled and integrated by the screws 74. In this integrated state, the washing water switching unit SU is fixed to the bottom surface of the hot water tank 13 with screws 80, and in this state, the lower end of the hot water outlet pipe 15 is connected to the hot water inlet 69B of the valve chamber 69. Is done. A packing 81 is provided to prevent hot water from the communication connection portion.

Moreover, in order to prevent warm water from leaking from the joint between the valve chamber member 70 and the switching passage member 73 by this integration, the joint is sealed with a rubber seal packing 82. Further, in the state where the flow of warm water is switched to the buttocks washing water passage 71 by the switching valve 66, the warm water is prevented from entering the bidet washing water passage 72, and the warm water flow is switched to the bidet washing water passage 72. In such a state, rubber seal packings 83 </ b> A and 83 </ b> B are attached to the entrance periphery of the buttocks washing water passage 71 and the bidet washing water passage 72 in order to prevent warm water from entering the buttocks washing water passage 71. . Accordingly, when the switching valve 66 is pushed toward the switching passage member 73 by the coil spring 79, one surface of the switching valve 66 is pressed against the seal packings 83A and 83B. The flow is switched to the buttocks washing water passage 71 and the bidet washing water passage 72 and rotated.

In addition, when one surface of the switching valve 66 is in pressure contact with the seal packings 83A and 83B, the switching valve 66 stabilizes the operation of switching between the washing water passage 71 and the bidet washing water passage 72 by switching the flow of hot water. For this reason, rubber contact members 85A, 85B, 84B, 84B, 84B of the switching passage member 73 are formed so as to be flush with the seal packings 83A, 83B, respectively.
85B is fitted.

The hot water cleaning unit 60 is connected to the hot water passage between the nozzle unit NU and the cleaning water switching unit SU, and the outlet portion 71A of the buttocks cleaning water passage 71 is connected to the hot water introduction portion 63B by a flexible pipe 75A. ing. Further, the bidet washing water passage 72 has an outlet portion 72A connected to the hot water introduction portion 64B through a flexible pipe 75B. As described above, the washing water switching unit SU is fixed to the bottom surface of the hot water tank 13 by the screws 80, and the hot water tank 13 is fixed to the fixed substrate in the main body case 3 by screws or the like. In addition, the nozzle unit NU is fixed to a fixed substrate in the main body case 3 by screws 89, and the butt washing nozzle 61 and the bidet washing nozzle 62 are placed at predetermined positions on the front-rear direction center line that is the center line between the left and right sides of the toilet seat 4. Kept. In this way, the hot water cleaning unit 60 is set at a predetermined position.

FIG. 3 shows a configuration of a control circuit 30 serving as a control means. A control unit 32 mainly composed of a microcomputer is connected to a commercial power source 31, and the operation board 18 is connected to an input circuit of the control unit 32. Are connected to the input circuit of the control unit 32, a seat switch 33 for detecting the seating on the toilet seat 4, a toilet seat temperature sensor 35 for detecting the temperature of the toilet seat 4, a float switch 51, and the hot water tank 13. A thermistor 55 for detecting the temperature of the hot water inside is connected.
The seat switch 33 includes a switch that operates when the toilet seat 4 is lowered by the weight when a person is seated on the toilet seat 4, and an infrared switch that detects a person seated on the toilet seat 4 with infrared rays.

The control unit 32 includes a timer, a memory, and the like, and is a microcomputer control system that performs a predetermined operation according to a predetermined program. The commercial power supply 31 is connected to switching elements 21, 22, 36, 37, 38, 39, and 40 that operate according to the output of the control unit 32.
The opening / closing electric motor 19 for the toilet seat 4, the opening / closing electric motor 20 for the toilet lid 5, the toilet seat heater 41, the hot water heater 42 for heating the water in the hot water tank 13, the electric motor 67 for driving the switching valve 66 (also referred to as a washing motor 67), and deodorization. The fan 25 and the solenoid valve 11 are connected. Moreover, as will be described later, the control unit 32 is connected to a notification unit SS that performs predetermined notification by water leakage determination.
The notification unit SS may be a light notification by simply turning on or blinking an LED, but in consideration of a situation of water leakage, a notification by sound generation using a buzzer or sound is desirable. Further, this light notification and sound notification may be used in combination.

In the standby state, the temperature detecting unit 50 whose contact is normally closed is opened when an abnormal temperature in the hot water tank 13 is detected, and the energization of the hot water heater 42 is interrupted. The hot water tank 13
As for the water inside, the control unit 32 operates by sensing the temperature of the thermistor 55, the switching element 37 performs ON / OFF operation of energization of the hot water heater 42, and the hot water temperature is maintained in a predetermined temperature range. The hot water level in the hot water tank 13 (washing water level) is controlled by the switching element 40 to open and close the solenoid valve 11 by detection of the float switch 51, and the hot water level in the hot water tank 13 (washing water level) is controlled to a predetermined level. To do. This predetermined level is the hot water outlet pipe 1
5 is slightly lower than the upper end opening 15A (the hot water outlet of the hot water tank 13).

In the standby state, the switching valve 66 has surfaces other than the valve passage 66A of the switching valve 66 on the seal packings 83A and 8 at the peripheral edges of the buttocks washing water passage 71 and the bidet washing water passage 72.
As a result, the switching valve 66 is in contact with the butt washing water passage 71 so that the inside of the hot water tank 13 does not communicate with either the butt washing water passage 71 or the bidet washing water passage 72.
The inlet of the bidet washing water passage 72 is closed, and the valve passage 66A does not communicate with either the buttocks washing water passage 71 or the bidet washing water passage 72, and is in a blocked state.

In such a standby state, when the switch 43 is turned on, the control unit 32 opens the toilet lid 5 upward by the electric motor 20. When the seating switch 33 detects the seating of the human body on the toilet seat 4, the switching element 39 is energized to rotate the deodorizing fan 25. In this sitting state, when the buttocks (anal) cleaning start switch 45 is pressed and a buttocks (anal) cleaning command is issued, or when the bidet cleaning start switch 46 is pressed and a bidet cleaning command is issued, the control unit 32.
Appropriately operates the switching elements 38 and 40, and the switching valve 6 is operated by the operation of the washing motor 67.
6 is rotated and the solenoid valve 11 is opened. When the solenoid valve 11 is opened, the water pressure from the water pipe 9 through the water supply pipe 14 is applied to the hot water tank 13, and the hot water is supplied to the bottom of the hot water tank 13 while the hot water in the hot water tank 13 is supplied. Is the upper end opening 15A of the hot water outlet pipe 15.
The water flows out from the hot water outlet 13 from the hot water tank 13 to the hot water outlet pipe 15 and is supplied to the valve chamber 69.

In this case, when the buttocks (anal) cleaning start switch 45 is pressed, the cleaning motor 6
7, the switching valve 66 is connected to the seal packing 83A, 83B and the contact members 85A, 85B.
The washing motor 67 stops in a state where the valve passage 66A of the switching valve 66 communicates with the buttocks washing water passage 71. As a result, the hot water supplied to the valve chamber 69 by the water pressure of the clean water passes through the valve passage 66A and the buttocks washing water passage 71, and flows from the outlet portion 71A through the flexible pipe 75A into the hot water introduction portion 63B. . The water pressure of the hot water flowing into the hot water introduction part 63B acts on the water receiving part 61B of the butt washing nozzle 61 in the retracted position (position shown in FIG. 7) by the coil spring 65A, and compresses the coil spring 65A while compressing the butt washing nozzle 61. The packing 61P comes into contact with the stop portion 63A, and the advancement stops. At this advanced position, the hot water as the washing water passes through the center hole of the water pressure receiving portion 61B and the inside of the washing nozzle 61 The buttocks (anus) are washed by warm water flowing into the passage 61T and ejecting from the nozzle port 61A at the tip.

Then, when the cleaning stop switch 44 is pressed and turned on, the control unit 32 operates,
The switching elements 38 and 40 are operated to return the switching valve 66 to the standby position by the operation of the washing motor 67 and close the electromagnetic valve 11. When the solenoid valve 11 is closed, the water pressure of the clean water is not applied to the hot water tank 13, and the jet of hot water from the nozzle port 61A is stopped, and the butt washing nozzle 61 is moved into the butt washing nozzle nozzle case 63 by the coil spring 65A. To the state of being retracted (position shown in FIG. 7).

Further, in the above, when the bidet cleaning start switch 46 is pressed instead of the buttocks (anal) cleaning start switch 45, the switching motor 66 is actuated by the operation of the cleaning motor 67 and the seal packings 83A and 83B and the contact member 85A. , 85B in contact with the switching valve 6
The washing motor 67 stops in a state where the six valve passages 66A communicate with the bidet washing water passage 72. Thus, the hot water supplied to the valve chamber 69 by the water pressure of the clean water passes through the valve passage 66A and the bidet washing water passage 72, and from the outlet portion 72A through the flexible pipe 75B, the hot water introduction portion 64B.
Flow into. The water pressure of the hot water flowing into the hot water introduction part 64B acts on the water receiving part 62B of the bidet washing nozzle 62 in the retracted position by the coil spring 65B, and advances the bidet washing nozzle 62 while compressing the coil spring 65B. The abutment stops against the stop portion 64A (the position shown in FIG. 7), and the hot water that is the wash water is the water pressure receiving portion 62 at the advanced position.
B passes through the central hole B and flows into the internal passage 62T of the bidet cleaning nozzle 62, and the nozzle port 6 at the tip
The bidet is washed with warm water spouted from 2A.

Then, when the cleaning stop switch 44 is pressed and turned on, the control unit 32 operates,
The switching elements 38 and 40 are operated to return the switching valve 66 to the standby position by the operation of the washing motor 67 and close the electromagnetic valve 11. When the solenoid valve 11 is closed, the water pressure of the clean water is not applied to the hot water tank 13, and the jet of hot water from the nozzle port 62A is stopped, and the bidet cleaning nozzle 62 is made into the bidet cleaning nozzle nozzle case 64 by the coil spring 65B.
It returns to the state retracted inside (the same state as the state where the buttocks cleaning nozzle 61 is retracted).

FIG. 9 is a configuration diagram of a float switch 51 that is one of the water level detectors 51. The float switch 51 includes a guide bar 51C extending vertically in the hot water tank 13 and a guide bar 51C.
The float 51A supported by the guide rod 51C so as to move up and down between the upper limit stopper 51C1 and the lower limit stopper 51C2 according to the water level in the hot water tank 13, and a reed switch 51B provided at the upper position of the guide rod 51C. When the float 51A moves up and down according to the water level in the hot water tank 13, the magnet Mg provided on the float 51A is moved to the reed switch 51B.
Is configured to perform an ON-OFF operation. When the float switch 51 is ON (or OFF), that is, at the upper limit water level position of the float 51A, the reed switch 51B is turned on by the magnet Mg.
N (or OFF) closes the solenoid valve 11 attached to the water supply pipe 14, and when the float 51A descends and the magnet Mg moves away from the reed switch 51B, the solenoid valve 11 is controlled to open, A predetermined amount of water is supplied into the tank 13.

The initial heating and standby state for heating the water in the hot water tank 13 from the beginning when the warm water washing toilet seat 1 is installed in the Western-style toilet 2 will be described. As a normal state of operation, the warm water flush toilet seat 1 is replaced with a Western style toilet 2
Initially, the hot water tank 13 is empty. Further, the float 51A is lowered and the magnet Mg is separated from the reed switch 51B, and is in an OFF (or ON) state. In this state, by inserting the power plug on the warm water flush toilet seat 1 side into the power outlet,
The solenoid valve 1 attached to the water supply pipe 14 by the switching element 40 by the operation of the control unit 32.
1 is energized to open the water supply pipe 14 and tap water is supplied into the hot water tank 13. When the float 51A rises due to the rise of the water level in the hot water tank 13 and the reed switch 51B is turned on (or turned off) by the magnet Mg, the switching element 40 turns off the electromagnetic valve 11 by the operation of the control unit 32. The water supply pipe 14 is closed and the supply of tap water into the hot water tank 13 is stopped. As the float 51A is raised and the reed switch 51B is turned ON (or OFF) by the magnet Mg, the switching element 37 is energized to the sheathed heater 42 by the operation of the control unit 32, and the water in the hot water tank 13 is discharged. Heated.

When the water temperature raised by this heating reaches the upper limit set temperature T3, the energization circuit of the sheathed heater 42 is turned off by the operation of the control unit 32 based on the detection of the thermistor 55 that detects the temperature of the hot water in the hot water tank 13. In the case where there is no cleaning by the buttocks cleaning nozzle 61 or the bidet cleaning nozzle 62, the control unit 32 operates based on the detection of the thermistor 55 and the switching element 37 operates the sheath when the water temperature reaches the lower limit set temperature t2 due to a natural temperature drop. The energization circuit of the heater 42 is turned on, the sheathed heater 42 is energized to generate heat, and the water in the hot water tank 13 is heated. When the water temperature increased by this heating reaches the upper limit set temperature t3, the switching element 37 turns off the energization circuit of the sheathed heater 42 by the operation of the control unit 32 based on the detection of the thermistor 55. By such a cycle operation, the water temperature in the hot water tank 13 is kept at a predetermined temperature of ts ° C.

When there is no cleaning by the buttocks cleaning nozzle 61 or the bidet cleaning nozzle 62, that is, when there is no water leakage from the hot water tank 13 or water leakage from the water supply pipe 14 from the solenoid valve 11 to the hot water tank 13 in the cleaning standby state. This is a natural drop in the hot water level due to evaporation, and with this drop in the hot water level in the hot water tank 13, the float 51A descends, and the magnet Mg moves away from the reed switch 51B at a predetermined descent point, and the reed switch 51B. Is in an OFF (or ON) state. The hot water level at this time is the lower limit level. By reaching this lower limit level, the operation of the control unit 32 causes the switching element 40 to energize (ON) the solenoid valve 11 to open the water supply pipe 14 and supply tap water into the hot water tank 13. As the hot water level rises due to this supply, the float 51A rises, and at a predetermined rise time, the magnet M
When the reed switch 51B is turned ON (or OFF) by g, the operation of the control unit 32 causes the switching element 40 to deenergize (OFF) the solenoid valve 11 to close the water supply pipe 14 and tap water into the hot water tank 13. Supply stops. The hot water level at this time is the upper limit level. Note that the water level difference between the upper limit level and the lower limit level can be determined by the time when the magnet Mg acts on the reed switch 51B and the time when it does not work when the float 51A moves up and down.

Thus, in the case of a natural drop in the warm water level due to evaporation, it takes a long time for the warm water level in the warm water tank 13 to decrease from the upper limit level to the lower limit level. However, when water leaks from the hot water tank 13 or when water leaks from the water supply pipe 14 from the solenoid valve 11 to the hot water tank 13, the rate of decrease in the hot water level (water level) in the hot water tank 13 is natural. It becomes considerably faster than the rate of decrease in the hot water level (water level) during the decrease, and the solenoid valve 11 is frequently turned ON / OFF
Will come to do.

For this reason, the durability of the solenoid valve 11 is lowered, and the tap water is frequently supplied into the hot water tank 13, so that the temperature of the hot water is lowered and the heating time by the sheathed heater 42 is increased. This is also an unfavorable situation. In the present invention, in view of such a point, in order to quickly detect water leakage, detection is performed by distinguishing whether the decrease in the warm water level is due to this natural decrease or due to water leakage. As this detection method, the detection based on the water supply operation interval by the electromagnetic valve 11, the detection based on the decrease rate of the hot water level, the electromagnetic valve 11 within a predetermined time.
Water leakage can be detected by detection based on the number of water supply operations.

Here, as shown in FIGS. 10 (a) and 10 (b), the electromagnetic valve 11 is opened at time t0, water is supplied and the level of the hot water in the hot water tank 13 reaches the upper limit level, and the electromagnetic valve 11 is electromagnetic at time t1. Valve 1
1 closes. In this state, a case where the hot water level naturally decreases due to evaporation and a case where there is water leakage will be described.

First, detection based on the decrease rate of the hot water level will be described. As shown in FIG. 10 (a), when the solenoid valve 11 is closed at the time t1 and no washing is performed by the butt washing nozzle 61 or the bidet washing nozzle 62, that is, in the washing standby state, the hot water level is naturally reduced by evaporation. If it decreases and decreases to the lower limit level at time t2, the electromagnetic valve 11 is opened again, the water is supplied and the level of hot water in the hot water tank 13 reaches the upper limit level, and the electromagnetic valve 11 is closed at time t3. In this case, the reference water supply operation interval time from time t0 to time t2 is defined as a first reference time TS1, and the reference water supply operation interval time from time t1 to time t3 is defined as a second reference time TS2. If the time Tm and Tn1 when the electromagnetic valve 11 opens twice are substantially the same, the first reference time TS1 and the second reference time TS2 are substantially the same.

On the other hand, when there is water leakage, as shown in FIG. 10B, after the electromagnetic valve 11 is opened at time Tm, before the first reference time TS1 or the second reference time TS2 elapses, at time t4. The electromagnetic valve 11 is opened, the level of the hot water in the hot water tank 13 reaches the upper limit level, and the electromagnetic valve 11 is closed at time t5. After that, if water leakage continues and decreases to the lower limit level at time t6,
The electromagnetic valve 11 is opened at time t6, the level of hot water in the hot water tank 13 reaches the upper limit level, and the electromagnetic valve 11 is closed at time t7. If water leakage continues and decreases to the lower limit level at time t8, the solenoid valve 11 opens at time t8, the level of hot water in the hot water tank 13 reaches the upper limit level, and the solenoid valve 11 reaches time t9. Closes. In this case, the time from time t0 to time t4 is the first operation time TL1 at the time of water leakage, and the time from time t1 to time t5 is the second operation time TL2 at the time of water leakage. If the time Tm and Tn2 for opening the electromagnetic valve 11 twice are substantially the same, the first operation time TL1 and the second operation time TL2 are substantially the same.

If the first operation time TL1 is reached before reaching the first reference time TS1 by the determination operation of the determination means provided therein, the control unit 32 determines that there is water leakage and notifies the notification unit SS. Alternatively, if the second operation time TL2 is reached before reaching the second reference time TS2 by the determination by the determination means, it is determined that there is water leakage, and notification is given by the notification unit SS. If there is no water leakage, it takes a long time for the level of hot water in the hot water tank 13 to decrease from the upper limit level to the lower limit level, but if there is water leakage, the level of hot water in the hot water tank 13 is higher than the upper limit level. It means that the time to decrease to the lower limit level is shortened. That is, whether or not there is water leakage is determined by time comparison (time determination) between the reference water supply operation interval TS1 or TS2 by the electromagnetic valve 11 when there is no water leakage and the water supply operation interval TL1 or TL2 by the electromagnetic valve 11 when there is water leakage. Will be determined.

Further, as apparent from the above time determination, when there is no water leakage, it takes a long time until the level of the hot water in the hot water tank 13 decreases from the upper limit level to the lower limit level, but when there is water leakage, the hot water tank 13 The time until the level of the hot water decreases from the upper limit level to the lower limit level is shortened. This means that when there is no water leakage and when there is water leakage, the rate of decrease in hot water level is different. A determination of whether or not is made.

Next, a case where water leakage is detected based on the number of water supply operations by the electromagnetic valve 11 within a predetermined time will be described. As shown in FIGS. 10A and 10B, when there is water leakage, the water supply operation by the electromagnetic valve 11 is performed a plurality of times before reaching the first reference time TS1 or before reaching the second reference time TS2. . That is, when there is no water leakage, as shown in FIG.
Although it is one water supply operation within S1 or the second reference time TS2, when there is water leakage, FIG.
As shown in (b), since the water supply operation is performed three times within the first reference time TS1 or the second reference time TS2, the number of water supply to the hot water tank 13 is greater when there is water leakage than when there is no water leakage. Increases, and there is a difference in the number of water supplies. For this reason, when the number of times of water supply within a predetermined time (TS1 or TS2 in the case of the embodiment of FIG. 10) is equal to or more than the predetermined number of times (two or more in the case of the embodiment of FIG. 10). In this case, it is determined that water has leaked, and a warning is given by the notification unit SS.

As described above, when there is no water leakage from the hot water tank 13 or water leakage from the water supply pipe 14 from the solenoid valve 11 to the hot water tank 13, the decrease in the hot water level in the hot water tank 13 is a natural decrease due to evaporation. . For this reason, by detecting the water leakage by detecting the water supply operation interval by the electromagnetic valve 11, detecting by the rate of decrease in the hot water level, or detecting the number of water supply operations by the electromagnetic valve 11 within a predetermined time, at a stage where there is little water leakage Water leakage can be detected, and the accuracy of water leakage detection is improved.

In the embodiment, the water level detector 51 is the float switch 51, and the float switch 5 is used as a measurement method of the time TS1 or TL1 until the electromagnetic valve 11 performs the water supply operation and the water supply operation again.
After 1 detects the upper limit water level, it can be the time until the upper limit water level is detected again. As another method, the time TS2 or TL2 from when the float switch 51 detects the lower limit water level to when the lower limit water level is detected again can be set.

Specifically, when the float switch 51 detects the upper limit water level or the lower limit water level, the reed switch 51B is turned off or on, so this signal is input to the control unit 32, and the reed switch 51B is turned off and then turned off again. Or the time until the lead switch 51B is turned on again after the reed switch 51B is turned on, and this time TL1 or T
By a substantial comparison between L2 and the reference time TS1 or TS2, this time TL1 or TL
When 2 is shorter than the reference time TS1 or TS2, it is determined that water has leaked and is notified by the notification unit SS.

In addition, the reference time TS1 or TS2 is collected in advance by the warm water flush toilet 1 by collecting a plurality of data of natural degradation due to evaporation when there is no water leakage, and storing the average value as reference time data in the memory of the control unit 32. In the standby state, the controller 32 may make a water leak determination.

In addition, in the above, the reference time TS1 or TS2 as the reference water supply operation interval is the time of the water supply operation interval in the case of natural degradation due to evaporation when there is no water leakage, but is set slightly shorter than this water supply operation interval. Arbitrary time may be set as a reference water supply operation interval. In this case, if the water supply operation interval by the electromagnetic valve 11 is shorter than the set reference water supply operation interval, the control unit determines that the water leaks, and operates the notification unit according to the determination output to perform a predetermined notification. Be controlled. Further, in the water leakage determination based on the number of water supply operations by the electromagnetic valve 11 within a predetermined time, the predetermined time is set as the reference water supply operation interval time set above, and the number of water supply within the set reference water supply operation interval is equal to or greater than the predetermined number of times. At this time, it may be determined that there is water leakage and an alarm is given by the notification unit SS.

In the above embodiment, the water level detector 51 is shown as a float switch, but the same effect can be achieved even with an electrode type. The warm water washing toilet seat is a warm water washing toilet seat that ejects warm water in the warm water tank from the butt washing nozzle or the bidet washing nozzle by tap water pressure supplied into the warm water tank. The cleaning nozzle is moved forward by tap water pressure applied to the hot water tank, and hot water is ejected from the nozzle port at the tip. Instead, the buttocks cleaning nozzle and the bidet cleaning nozzle are advanced and retracted by their respective motors. The present invention can also be applied to a motor type that operates. In this case, the coil spring 65
A and 65B are unnecessary.

Also in the case of this motor type, the configuration and operation of the cleaning water switching unit SU are the same as described above, and the switching valve 66 is rotated by the operation of the cleaning motor 67 and the electromagnetic valve 11 is opened.
The same applies to the normal operation in which warm water is ejected from the butt washing nozzle 61 or the bidet washing nozzle 62.

For this reason, in the warm water washing toilet seat in which tap water is supplied into the hot water tank 13 by opening the solenoid valve 11, the buttocks washing nozzle 61 and the bidet washing nozzle 62 are advanced and retracted by their respective motors. Including the case, the present invention is not limited to the configurations shown in the above-described embodiments, but can be applied to various forms, and includes various forms within the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Toilet bowl with warm water 2 ... Western style toilet 3 ... Body case 4 ... Toilet seat 5 ... Toilet lid 6 ... Water supply pipe 7. ··· Piping hose 8 ··· Branch faucet 9 ··· Water supply pipe ······································· Solenoid valve Tank 14 ... Water supply pipe 15 ... Hot water outlet pipe 16 ... Deodorization mechanism 17 ... Board 18 ... Operation board 19 ... Electric motor 20 ... Electric motor 21 ... Switching element 22 ... Switching element 23 ... ON / OFF switch 30 of motor 19 ... Control circuit 31 ... Commercial power supply 32 ... Control unit 33 ... Seat switch 35 ... Temperature sensor for toilet seat 36 ... Switching element 37 ... Switch Ching element 38 ... Switching element 39 ... Switching element 40 ... Switching element 41 ... Toilet seat heater 42 ... Hot water heater 43 ... ON / OFF switch 44 of motor 20 ··· Washing stop switch 45 ··· Butt (anal) washing start switch 46 ··· Bidet washing start switch 47P, 47Q · · · Water flow increase / decrease switch 48 · · · Hot water temperature adjustment switch 49 .... Toilet seat temperature control switch 50 ... Temperature detector 51 ... Water level detector (float switch)
51A ... Float 51B ... Reed switch 51C ... Guide rod 51C1 ... Upper limit stopper 51C2 ... Lower limit stopper 52 ... Negative pressure valve 53 ... Brightness detection sensor 54 ... Hot water detection Sensor 55... Hot water temperature detection thermistor 60... Hot water cleaning unit 61... Butt (anus) cleaning nozzle 61 B. Anus) Nozzle port of cleaning nozzle 61P ... Packing 62 ... Bidet cleaning nozzle 62A ... Nozzle port of bidet cleaning nozzle 62B ... Water receiving part of bidet cleaning nozzle 62P ... Packing 63 ...・ Poetry (anus) cleaning nozzle case 63A ・ ・ ・ Stopping portion 63B ・ ・ ・ Hot water introduction portion 64 ・ ・ ・ ・ Bidet cleaning nozzle case 64A ・ ・ ・ Stopping portion 64B ... Hot water introduction part 65A ... Coil spring 65B ... Coil spring 66 ... Switching valve 67 ... Electric motor 68 ... Drive shaft 69 of electric motor 67 ... Valve chamber 69B ...・ Warm water introduction port 70... Valve chamber member 71... Butt wash water passage 71 A... Outlet portion of the butt wash water passage 72... Bidet wash water passage 72 A. Outlet portion 73... Switching passage member 74... Screw 75A ... Flexible pipe 75B ... Flexible pipe 77 ... Support shaft 78 ... Support shaft 79 ... · Coil spring 82 ··· Seal seal 83A · · · Seal packing 83B · · · Seal packing 85A · · · Contact member 85B · · · Contact member 87 · · · Mounting member 90 · · · Air vent passage 90A ···Sky Vent passage outlet 91 ·················································· Nozzle case body NU ····· Nozzle unit

Claims (3)

A hot water tank that heats tap water supplied by a water supply pipe by a sheathed heater, a water level detector that detects the water level in the hot water tank, and an electromagnetic valve that controls the supply of the tap water by opening and closing the water supply pipe In a warm water washing toilet seat that opens and closes the electromagnetic valve by the water level detection of the water level detector and accumulates water at a predetermined water level in the hot water tank, with respect to a reference water supply operation interval,
When the water supply operation interval by the electromagnetic valve is short, it is determined that water leaks by the control unit, and the notification unit is operated according to the determination output to perform predetermined notification, wherein the leak detection device for the hot water washing toilet seat is characterized in that A hot water tank that heats tap water supplied by a water supply pipe by a sheathed heater, a water level detector that detects the water level in the hot water tank, and an electromagnetic valve that controls the supply of the tap water by opening and closing the water supply pipe A warm water washing toilet seat that opens and closes the solenoid valve by the water level detection of the water level detector and supplies water into the hot water tank to accumulate water at a predetermined water level. The water leakage detection device for a warm water washing toilet seat is characterized in that the controller determines that the water leaks and operates the notification unit according to the determination output to perform predetermined notification. The water supply operation interval is defined as the time until the water level detector detects the upper limit water level and again detects the upper limit water level, or the time until the water level detector detects the lower limit water level and again detects the lower limit water level. The leak detection device for a warm water washing toilet seat according to claim 1,

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