JP2835691B2 - Toilet cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet cleaning apparatus for discharging hot water from a cleaning nozzle.

[0002]

2. Description of the Related Art
As this type of toilet cleaning device, Japanese Utility Model Publication 3-4829
No. 3 is known. That is, in a toilet cleaning device, high-temperature water from a water heater is mixed with low-temperature water such as tap water by a mixing valve and the mixing ratio is changed to make the temperature of the cleaning water from a cleaning nozzle desired. It is. This device is provided with a bypass valve so that cold water does not squirt from the start of water discharge due to water remaining in the pipe close to the cleaning nozzle, and discards water from the bypass valve until the set temperature is reached. When it becomes, water is being discharged from the cleaning nozzle. However, in such a conventional toilet cleaning device, when the device itself breaks down because of handling high-temperature water,
There was a problem that high-temperature water was easily ejected as it was.

Further, as another conventional technique, low-temperature water is supplied to a hot water storage tank through a main electromagnetic valve provided in a primary flow path, and this is heated by a heater, and the main electromagnetic valve is opened to open the hot water storage tank. There is also known a method in which high-temperature water is pumped by applying water pressure to water and mixed with low-temperature water to thereby eject appropriate-temperature water (see Japanese Utility Model Publication No. 3-52305). In this technology, even if the main solenoid valve is closed to end the water discharge, the hot water storage tank expands and contracts due to the pressure at the time of water supply, so that the water is gently discharged from the cleaning nozzle, and so-called rubbing occurs. There was a problem of causing discomfort.

[0004] As described above, in the above-described conventional technique, high-temperature water is spouted at the time of failure of the apparatus, or water is spouted at the end of spouting, so that water not suitable for cleaning is spouted from the cleaning nozzle. Problem.

The present invention solves the above-mentioned problems of the prior art. Toilet in which water that is not suitable for cleaning is not discharged from the cleaning nozzle even when the apparatus itself fails or when water discharge ends. It is an object of the present invention to provide a cleaning device for use.

[0006]

According to a first aspect of the present invention, there is provided a toilet cleaning apparatus for discharging hot water from a cleaning nozzle, comprising: a main pipe for flowing hot water to the cleaning nozzle; A branch pipe branched from the main pipe, connected to the main pipe, and having an outlet to the outside; an opening / closing valve provided in the branch pipe to flow mixed hot water to the outside through the discharge port by opening the valve; Temperature detecting means for detecting the temperature of the hot water flowing through the pipe, and when a detection signal from the temperature detecting means is equal to or higher than a predetermined temperature, the on-off valve is opened to discharge hot water of the main pipe from the outlet of the branch pipe. And a high-temperature water discharge avoidance control means for performing control as described above.

According to a second aspect of the present invention, in the first aspect, the washing nozzle is configured to move between a washing position for washing a local part of a person and a standby position. Opening the on-off valve after the operation of the operating unit for instructing the nozzle for water discharge and while waiting for the water discharge from the cleaning nozzle, and stopping the water discharge from the main pipe when the temperature detecting means is higher than a predetermined temperature. The control for storing the cleaning nozzle in the standby position is performed.

According to a third aspect of the present invention, there is provided a toilet cleaning apparatus for ejecting hot water from a cleaning nozzle, comprising: a main pipe for flowing hot water to the cleaning nozzle; a main pipe branched from the main pipe and connected to the outside; A branch pipe having an outlet, and a three-way switching valve that is provided at a connection between the main pipe and the branch pipe and selectively communicates a downstream passage on the cleaning nozzle side of the main pipe with a path of the branch pipe. Temperature detection means for detecting the temperature of the hot water flowing through the main pipe, and when the detection signal from the temperature detection means is equal to or higher than a predetermined temperature, the three-way switching valve is communicated to the branch pipe side to form the main pipe. And high-temperature water discharge avoidance control means for controlling the hot and cold water to be discharged from the outlet of the branch pipe.

According to a fourth aspect of the present invention, in the third aspect, the cleaning nozzle is configured to move between a cleaning position for cleaning a local part of a person and a standby position. After the operation of the operation unit for instructing water discharge and while waiting for water discharge from the washing nozzle, the three-way switching valve is opened to the passage side of the branch pipe, and when the temperature detecting means is higher than a predetermined temperature, the main pipe is disconnected. In addition to stopping the water discharge, a control for storing the cleaning nozzle in the standby position is executed.

According to a fifth aspect of the present invention, in the first to fourth aspects, the high-temperature water discharge avoiding means includes a control device for controlling the cleaning nozzle and another protection circuit.

According to a sixth aspect of the present invention, there is provided a toilet cleaning apparatus for ejecting hot water from a cleaning nozzle, comprising: a main pipe for flowing hot water to the cleaning nozzle; a main pipe branched from the main pipe and connected to the outside; A branch pipe having an outlet, an opening / closing valve provided in the branch pipe, for flowing mixed hot water to the outside through a discharge port by a valve opening operation, and a cleaning end detecting means for detecting the end of cleaning and spouting by the cleaning nozzle; After-wash control means for controlling to open the on-off valve and to discharge hot water of the main pipe from the discharge port of the branch pipe when it is determined that the cleaning water spout has ended based on the detection signal from the cleaning end detection means. , Is provided.

According to a seventh aspect of the present invention, there is provided a toilet cleaning apparatus for ejecting hot water from a cleaning nozzle, comprising: a main pipe for flowing hot water to the cleaning nozzle; a main pipe branched from the main pipe and connected to the outside; A branch pipe having an outlet, and a three-way switching valve provided at a connection between the main pipe and the branch pipe, and selectively communicating a passage of a downstream pipe of a cleaning nozzle of the main pipe with a path of the branch pipe. Cleaning end detecting means for detecting the end of cleaning water spouting by the cleaning nozzle; and, when judging the end of cleaning water spouting based on a detection signal from the cleaning end detecting means, sets the three-way switching valve to a branch pipe. And a post-wash control means for opening the side passage and controlling the hot water of the main pipe to be discharged from the outlet of the branch pipe.

According to the invention of claim 8, a pre-cleaning nozzle for jetting hot water toward the inner wall surface of the toilet bowl is provided at the end of the branch pipe.

[0014] The inventions of claims 9 and 10 are:
As the on-off valve and the three-way switching valve, an electromagnetic valve communicating with the branch pipe side when not energized is used.

[0015]

In the toilet cleaning apparatus according to the first aspect of the present invention, the hot water flowing through the main pipe is discharged from the cleaning nozzle to clean the buttocks and the like. On the other hand, a branch pipe is connected to the main pipe, and the branch pipe is provided with an on-off valve. The temperature of the hot water flowing through the main pipe is detected by the temperature detecting means and input to the high-temperature water discharge avoiding means. In the high temperature water discharge avoiding means, when the temperature of the hot water is equal to or higher than the predetermined temperature, the on-off valve is opened to discharge the hot water of the main pipe from the outlet of the branch pipe.
Therefore, the safety is high without hot water having a temperature equal to or higher than the predetermined temperature being discharged from the cleaning nozzle.

The invention according to claim 2 has a function of moving the cleaning nozzle between the cleaning position and the standby position, cleaning a local part of the person at the cleaning position, and waiting at the standby position for another processing. When the high-temperature water discharge avoiding means detects a predetermined temperature or more, the water discharge from the main pipe is stopped, and the cleaning nozzle is moved to the standby position. Without any additional safety.

In the third and fourth aspects, the three-way switching valve is used in place of the on-off valve used in the first and second aspects, so that the washing nozzle can be more reliably stopped. This prevents high-temperature spouting at the washing position.

According to a fifth aspect of the present invention, the high-temperature avoiding means is constituted by a control device for controlling the cleaning nozzle and a separate protection circuit. Avoids water spouting and increases safety.

In the toilet cleaning apparatus of the present invention, a cleaning end detecting means for detecting the end of the cleaning water discharge by the cleaning nozzle is provided, and this signal is inputted to the after-washing control means. When the post-wash control means determines, based on the signal, that the cleaning water spout has ended, it opens the on-off valve and discharges the hot water in the main pipe from the outlet of the branch pipe to the outside. Therefore, the water discharge from the cleaning nozzle is terminated immediately after the cleaning is completed, and unpleasant water discharge from the cleaning nozzle due to the residual pressure of the main pipe is not performed.

According to a seventh aspect of the present invention, a three-way switching valve is used in place of the on-off valve used in the sixth aspect of the present invention.
The cleaning nozzle is securely stopped to prevent water discharge due to residual pressure.

In the eighth aspect, a pre-cleaning nozzle is connected to the branch pipe, and the spout of the pre-cleaning nozzle is configured to face the inner wall surface of the toilet, so that water can be discharged except for cleaning the buttocks and the like. The used warm water is used for flushing a toilet, etc., and effective use of the flush water can be achieved.

In the toilet cleaning device of the ninth and tenth aspects, since the on-off valve and the three-way switching valve use the solenoid valve communicating with the branch pipe when the power is not supplied, for example,
Even if the device according to claim 1 fails, the high-temperature water is discharged from the outlet of the branch pipe, and does not discharge from the cleaning nozzle.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, preferred embodiments of the present invention will be described below. FIG. 1 is an external view of a Western-style toilet equipped with a sanitary washing device according to one embodiment of the present invention, and FIG. 2 is a Western-style toilet 1 of FIG.
FIG. 2 is a cross-sectional view of a portion such as 2 and a main body 14.

First, the overall configuration of the sanitary washing device 5 shown in FIG. 1 will be described. As shown in the figure, the sanitary washing device 5 is mounted on a Western-style toilet bowl 12, and is provided with a hot water adjusting device 10 for heating washing water and discharging at a set temperature.
(See FIG. 3), a cleaning nozzle device 16 for spouting cleaning water to a local area, a pre-cleaning nozzle 17 (FIG. 2) for discharging water toward the inner wall surface of the Western toilet 12, and an operation panel 18 for performing operations And the like. In the embodiment, the toilet seat 22 and the toilet lid 24 are also attached to the main body 14 so as to be openable and closable.

A washing water tank 26 is mounted on the front upper portion of the Western toilet 12, and a water supply pipe for supplying washing water is connected to the washing water tank 26. In addition, the water supply pipe is also connected to the hot water adjusting device 10 via a branch fitting and a connecting pipe (not shown) to supply water thereto.

Next, the configuration of the hot water adjusting device 10 will be described. As shown in FIG. 3, in the hot water regulator 10, a primary water main flow path 32 is connected to a water supply pipe to receive supply of tap water. The pressure reducing valve 50 is connected to the primary water main flow path 32. The pressure reducing valve 50 is a pressure regulating valve for protecting the hot water regulator 10 itself against a rapid rise in the water source in the primary water main flow path 32. A main solenoid valve 60 is connected to the secondary flow path of the pressure reducing valve 50. The secondary flow path of the main solenoid valve 60 is branched into a hot water side flow path 34 and a water side flow path 35. A sub-tank 74 and a hot-water storage tank 70 formed of a synthetic resin are connected in series to the hot-water-side branch flow path 34.

A heater 72 for heating stored water is provided in the hot water storage tank 70. This heater 72
Is controlled on and off by the temperature controller 73 to adjust the stored water to a predetermined temperature (for example, 60 ° C.).

The hot water storage tank 70 is connected to a hot water outflow channel 36 for allowing hot water to flow out. A first vacuum breaker 80 is provided at a position higher than the water level of the hot water storage tank 70 in the middle of the hot water outflow passage 36. First
As shown in FIG. 5, the vacuum breaker 80 includes a primary flow path 82, a secondary flow path 83, and an outside air introduction path 84 in a case body 81. At the opening of the primary side flow path 82 of the case body 81, a sheet portion 87 is formed.
The seat portion 87 is provided such that the seat portion 86 of the valve body 85 is seated. In addition, the seat portion 87 includes
As shown in FIG. 7, four notches 87a for ventilation are formed at 90 ° intervals in the circumferential direction.

With such a configuration of the first vacuum breaker 80, when the high-temperature water in the hot water storage tank 70 is applied to the valve body 85 through the primary flow path 82 and the force in the direction of pushing up the valve body 85 increases, the valve body 85 The valve opens against its own weight, and high-temperature water flows from the primary flow path 82 to the secondary flow path 83. On the other hand, when the pressure of the high-temperature water in the primary flow path 82 becomes smaller than the own weight of the valve body 85, the seating portion 86 sits on the seat portion 87 and closes the valve. At this time, since the notch 87a is formed in the seat portion 87, air is introduced into the primary flow path 82 through the notch 87a. Thereby, an air gap is formed in the hot water storage tank 70 through the primary flow path 82.

The high-temperature water passing through the first vacuum breaker 80 and the low-temperature water passing through the water-side branch passage 35 are supplied to a mixing valve 90. The mixing valve 90 is driven by a motor that changes the mixing ratio of hot and cold water by changing the flow area of the hot water side flow path connected to the hot water outflow flow path 36 and the water side flow path connected to the water side branch flow path 35. Is a rotary type solenoid valve.

A second vacuum breaker 100 is connected to the mixing valve 90. 2nd vacuum breaker 10
0 is installed at the same water level as the upper surface of the hot water storage tank 70. The second vacuum breaker 100 has substantially the same configuration as the first vacuum breaker 80 shown in FIG.
As shown in FIGS. 8 and 9, a difference is that a notch is not formed in the sheet portion 107. With the configuration of the second vacuum breaker 100, the valve body 105 is opened by the water pressure from the primary flow path 102. However, even if a negative pressure is generated in the primary flow path 102, the valve body 105 is opened to the primary flow path 102. No fluid flows.

A flow control unit 110 is connected to the secondary flow path 103 of the second vacuum breaker 100 via a water discharge flow path 42. The flow control unit 110 includes:
The motor is driven, and the drive amount is adjusted under the control of the electronic control device 200. Here, the flow control unit 110 is provided on the upstream side of the mixing valve 90 for the following reason. The fluctuation value of the primary pressure and the secondary pressure accompanying the flow control in the flow control unit 110 is smaller for the primary pressure. The mixing valve 90 is a valve that changes the mixing ratio of high-temperature water and low-temperature water by changing the opening area of the hot water side flow path and the water side flow path, and is greatly affected by the pressure fluctuation. Therefore, the flow control unit 11
The mixing valve 90 was connected to the primary side flow path having a small pressure fluctuation of zero.

The cleaning nozzle device 16 is connected to the secondary flow path of the flow control unit 110. The cleaning nozzle device 16 jets cleaning water toward a local portion, and the cleaning nozzle 16a is advanced by a motor 16b when cleaning is used, and is retracted when not in use or during nozzle cleaning. In addition, an electromagnetic bypass valve 130 that is open when power is not supplied is connected to the secondary-side flow path of the second vacuum breaker 100 via a bypass flow path 44. The pre-wash nozzle 17 is connected to the secondary flow path of the bypass valve 130. As shown in FIG. 2, the pre-wash nozzle 17 is provided with a spout so as to spout toward the inner wall surface of the Western style toilet 12.

The hot water adjusting device 10 having such a configuration is provided with a plurality of thermistors for controlling the discharge of mixed hot and cold water at the target set temperature from the cleaning nozzle 16a. That is, the water temperature thermistor 1 is
The hot water storage tank 70 is provided with a hot water thermistor 1.
A mixing temperature thermistor 1 is provided in the mixing channel 38.
56 and a limiter thermistor 158 are provided,
The temperature of high-temperature water or low-temperature water in each flow path or hot water storage tank 70 is detected.

The operation unit 20 shown in FIG. 1 is provided with various switches. That is, as shown in FIG. 4, a bottom cleaning button 174, a bidet cleaning button 176, a stop button 177, a temperature setting button 178 for adjusting the water discharge temperature.
And a water amount adjustment button 182 for adjusting the water amount. Further, the toilet seat 22 is provided with a seating sensor 162 that detects a person sitting on the toilet seat 22. As the seat sensor 162, for example, a pressure sensor provided inside the toilet seat 22 can be used.

The detection signals of the above-described sensors and the output signals of the switches and the like are input to the electronic control unit 200. The electronic control unit 200 is configured as a logical operation circuit centered on a microcomputer, and more specifically, a CPU 202 that executes various operation processes for controlling the temperature of the washing water and the like according to a preset control program;
A ROM 204 in which a control program, control data, and the like necessary for executing various arithmetic processes in 202 are stored in advance;
Similarly, a RAM 206 for temporarily reading and writing various data necessary for executing various arithmetic processing in the CPU 202.
An input processing circuit 207 for inputting a detection signal from each sensor or a signal from a switch and converting the signal into a signal that can be processed by the CPU 202; Output processing circuit 2 for output
08 and the like.

The detection signal from the limiter thermistor 158 is input to the protection circuit 210. Protection circuit 210
Has the configuration shown in FIG. As shown in FIG. 10, a resistor 212 is connected in series to the limiter thermistor 158, and the divided voltage is divided by a resistor 214 and a capacitor 216 to form an integrating circuit 218 for preventing noise.
Is added to The voltage of the integrating circuit 218 is applied to the minus terminal of the comparator 220. Comparator 22
A voltage divided by the resistors 222 and 224 is applied as a reference voltage to the positive terminal of 0. The output terminal of the comparator 220 is connected to the relay coil 232 of the relay 230, and the switch 234 of the relay 230 is connected to the main solenoid valve 60.
Are connected in series to the solenoid coil 62. The diode 236 is a diode for absorbing the back electromotive force of the relay coil 232.

Next, the operation of the protection circuit 210 will be described. Now, when the limiter thermistor 158 is lower than a predetermined temperature (for example, 50 ° C.), a voltage lower than the reference voltage is applied to the minus terminal of the comparator 220, so that the output terminal is held at the H level. The relay coil 232 is not excited, and the switch 234 is closed. Therefore, the main solenoid valve 60 is on / off controlled by the output of the electronic control unit 200.

On the other hand, when the temperature of the limiter thermistor 158 becomes higher than a predetermined temperature, a voltage higher than that of the plus terminal is input to the minus terminal of the comparator 220 due to its negative resistance characteristic. As a result, the output terminal of the comparator 220 is inverted to the L level, and a current flows through the relay coil 232, so that the switch 234 is opened. As a result, the solenoid coil 62 of the main solenoid valve 60 is de-energized, and the main solenoid valve 60 is closed. Therefore, when the limiter thermistor 158 detects a predetermined temperature or higher, the main solenoid valve 60 is closed by the operation of the hardware circuit.
That is, the electronic control device 200 fails and the thermistor 15
Even when the detection of No. 6 becomes impossible, the protection circuit 210 is activated and the high-temperature washing water is not discharged, and the safety is further improved.

Next, the operation of the hot water adjusting device 10 will be described. Tap water in the primary water main flow path 32 is supplied to the pressure reducing valve 5.
The pressure is reduced to a predetermined pressure by 0 and is added to the main solenoid valve 60. When the posterior cleaning button 174 or the bidet cleaning button 176 is turned on while the power is on, the main solenoid valve 60 is opened. When the main solenoid valve 60 is opened, tap water is supplied from the hot water side branch flow path 34 to the hot water storage tank 70 through the sub tank 74 and also to the water side branch flow path 35. The water stored in the hot water storage tank 70 is heated to a predetermined temperature (for example, 60 ° C.) by the heater 72. The temperature control of the high-temperature water in the hot water storage tank 70 is performed by the heater 7 by the temperature control device 73 which receives a control signal from the electronic control device 200.
2 on / off control. The high-temperature water in the hot-water storage tank 70 passes through the first vacuum breaker 80 and is supplied to the mixing valve 9.
0 and is mixed with the low-temperature water flowing through the water-side branch channel 35 by the mixing valve 90.

The mixing valve 90 receives a control signal from the electronic control unit 200, adjusts the flow area of the hot water side flow path and the water side flow path, and changes the mixing ratio of high-temperature water and low-temperature water. Change the temperature of the mixed water. Here, the opening degree of the mixing valve 90 is controlled by the hot water temperature thermistor 154 and the water temperature thermistor 152.
The electronic control unit 200 performs the feed-forward control based on the detected temperature from the controller, or the electronic control unit 200 performs the feedback control based on the detection signal from the mixed temperature thermistor 156.

The mixed hot and cold water discharged from the mixing valve 90 is supplied to the water discharging flow path 42 or the bypass flow path 44 via the second vacuum breaker 100 and is supplied to the flow control unit 11.
0, the water is discharged from the cleaning nozzle 16a.
When the bypass valve 130 is open, water is discharged through the pre-cleaning nozzle 17.

It should be noted that the water amount adjustment button 182 is selected by the user.
Is changed, the signal is sent to the electronic control unit 20.
The output from the cleaning nozzle 16a is output to the flow control unit 110 through the control unit 0. When the setting of the temperature setting button 178 is changed, the signal is output to the mixing valve 90 via the electronic control unit 200, the mixing ratio is changed, and the temperature of water discharged from the cleaning nozzle 16a is changed. .

In this embodiment, the sub-tank 74 is provided on the upstream side of the hot water storage tank 70 for the following reason. When the main solenoid valve 60 is closed, the water supply to the hot water storage tank 70 is stopped. However, since the hot water storage tank 70 is formed of resin, the hot water storage tank 70 expands and contracts due to the pressure at the time of water supply. The hot water inside flows backward. The hot water stored in the hot water also expands when heated, and gradually flows backward due to heat conduction, convection and the like. This hot water goes to the water-side branch flow path 35 side, but if it enters the water-side branch flow path 35, a temperature higher than the temperature of tap water is detected by the water temperature thermistor 152, and based on this temperature, the water discharge temperature is determined. When the control is performed, the control becomes unstable. The sub tank 74 is
The high-temperature water flowing backward from the hot-water storage tank 70 is stored here so as not to flow toward the water-side branch channel 35, so that the temperature detected by the water temperature thermistor 152 is not affected, thereby ensuring control stability. Note that even if high-temperature water enters the sub tank 74 from the hot water storage tank 70,
Since the low-temperature water is filled, the low-temperature water only flows into the water-side branch flow path 35 side without affecting the temperature detected by the water temperature thermistor 152.

In order to prevent the backflow of high-temperature water from the hot-water storage tank 70, a check valve may be used. However, the sub-tank 74 only stores high-temperature water flowing back from the hot-water storage tank 70. Therefore, pressure loss that causes flow path resistance does not occur.

Next, the reason why the first vacuum breaker 80 and the second vacuum breaker 100 are provided on the downstream side of the hot water storage tank 70 will be described. Main solenoid valve 60
When the water pressure is applied to the hot water storage tank 70 by the opening of the hot water and the high-temperature water flows out, as shown by the solid line in FIG.
The water flows into the mixing valve 90 through the first vacuum breaker 80, is mixed with the low-temperature water in the water-side branch passage 35, reaches the second vacuum breaker 100, and discharges water therethrough.

When the main solenoid valve 60 is closed and the water pressure is no longer applied to the hot water storage tank 70, a siphon phenomenon occurs due to a difference in water level between the hot water storage tank 70 and the head of the cleaning nozzle 16a. As shown, the high-temperature water in the hot-water storage tank 70 flows out to the hot-water-side branch flow path 34, causes the water in the hot-water storage tank 70 to flow out, and divides the water in the hot-water storage tank 70 into the water-side branch flow path 35 and the mixing valve 90. Then, the water is discharged from the cleaning nozzle 16a through the mixing flow path 38 and the water discharge flow path 42. At this time, the valve body 85 of the first vacuum breaker 80 is closed by its own weight because the water pressure of the hot water storage tank 70 becomes small, and air is introduced from the notch 87a to form an air gap. Although the high-temperature water in the hot water storage tank 70 gradually lowers the water level, when the water level becomes the same as that of the second vacuum breaker 100, the valve element 10 of the second vacuum breaker 100
Since the water pressure applied to 5 becomes small, the second vacuum breaker 100 closes and stops the outflow of high-temperature water due to the siphon phenomenon.

Therefore, the high-temperature water in the hot-water storage tank 70 flows backward to the hot-water-side branch flow path 34 side.
The high temperature water does not flow out to the water side branch flow path 35 side because the sub tank 74 is provided on the upstream side of the sub tank 74. Further, the outflow side flow path of the hot water storage tank 70 is provided with the first vacuum breaker 8.
When the water supply is stopped by the action of the zero and second vacuum breakers 100, the edge is cut off by the air gap. Therefore, the high-temperature water does not flow out to the mixed temperature thermistor 156 and the limiter thermistor 158 due to the heat conduction of the high-temperature water. As a result, 45 ° C.
Without detecting the above water discharge temperature, the electronic control unit 2
00 and the protection circuit 210 do not erroneously perform the protection operation.

Further, the second vacuum breaker 100
Even if water pressure is applied from the secondary flow path, it does not act as a force to open the valve body 105, so that when water stays in the Western toilet 12 and the water level rises, the sewage in the Western toilet 12 is mixed with the mixing valve 90. Prevent backflow to the side.

Next, the program cleaning process executed by the electronic control unit 200 will be described. The program cleaning process includes a pre-cleaning process, a pre-nozzle cleaning process, a main cleaning process, and a post-nozzle cleaning process. These processes are shown in the flowcharts of FIGS.
Explanation will be made based on the time chart of FIG. When the process is started, that is, in a steady state in which the user is not using the device, the main solenoid valve 60 is closed and the bypass valve 130 is open.

As shown in FIG. 12, first, a pre-cleaning process is executed. At step S102, the seating sensor 1
If it is determined that the switch has been turned on based on the detection signal from 62, the process proceeds to step S104. In step S104,
The water temperature data TD and the detected temperature TH of the hot water temperature thermistor 154 at the time of the previous water discharge are read. Water temperature data T
D is data stored in the RAM 206 in the previous cleaning process. In step S106, the mixing ratio V of the hot water of the mixing valve 90 is calculated based on the following equation (1) so that the target set temperature Tm becomes 30 ° C. V = (Tm−TD) / (TH−TD) (1)

In the next step S108, the opening control of the mixing valve 90 is executed. It should be noted that the setting of the mixture ratio V is based on the processing based on the data at the time of the previous water discharge (steps S104,
6) Any T that is expected to fluctuate without performing
The valve opening may be fixed at a value that does not cause a problem at the temperatures H and TD, and may be fixed. In step S112, it is determined whether a predetermined time (for example, 3 seconds) has elapsed,
If an affirmative determination is made, the main solenoid valve 60 is closed in step S114 to end the pre-cleaning.

At this time, since the bypass valve 130 is open, water is spouted through the pre-wash nozzle 17 to wet the inner wall surface of the Western toilet 12 and prevent stool from adhering to the inner wall surface.

The pre-cleaning has an effect of improving the responsiveness by discharging water at a target of 30 ° C., thereby pre-warming the mixed temperature thermistor 156 used in the subsequent main cleaning. That is, the mixed temperature thermistor 156 is housed in a metal case, and there is a time lag in detecting the correct temperature by heating the case. By performing the pre-cleaning, the responsiveness at the time of warming the mixed temperature thermistor 156 and performing the main cleaning after that is improved. Here, the water discharge temperature is usually set to a temperature almost equal to or slightly higher than the body temperature, but is set to 30 ° C. lower than this temperature. This is the previous water temperature data TD
If the tap water happens to be at a higher temperature, the water discharge temperature may instantly exceed 45 ° C., and the limiter thermistor 158 detects this instantaneous temperature, and the protection circuit 2
This is to prevent the function from being stopped due to the operation of No. 10.

Next, as shown in the flowchart of FIG. 13, the nozzle pre-cleaning process will be described. As shown in FIG. 13, in step S120, the buttocks washing button 17
4 or the bidet cleaning button 176 is pressed, the detected temperature TC of the water temperature thermistor 152 is read, and further, the target set temperature Tm is read in step S124. In a succeeding step S126, the opening degree of the mixing valve 90 is calculated and the mixing valve 9 is adjusted so as to reach the target set temperature Tm.
The opening control of 0 is executed. Then, step S130
Then, the bypass valve 130 is closed.

In the following step S130, the main solenoid valve 60
Is turned on and opened. At this time, the cleaning nozzle 16a
The washing water is ejected from the nozzle, but since the washing nozzle 16a is housed in a cylinder (not shown), the ejected washing water is reflected by the cylinder to wash the nozzle outlet. At step S132, a predetermined time (for example, one second)
When it is determined that the time has elapsed, in step S134,
The main solenoid valve 60 is closed and the bypass valve 130 is opened. In a succeeding step S136, the cleaning nozzle 16a is advanced to a predetermined position.

Steps S120 to S13
By 4, the cleaning nozzle 16 a is spouted at the retracted position to perform nozzle cleaning. At this time, since the low-temperature water flows during the pre-wash and the low-temperature water remaining in the water-side branch channel 35 is discharged, the detection temperature TC detected by the water temperature thermistor 152 flows constantly. It becomes the detection value of tap water. Therefore, when the feedforward control is executed at the detected temperatures TH and TC of the hot water temperature thermistor 154 and the water temperature thermistor 152, an almost accurate target set temperature T
m, and the mixed temperature thermistor 156 is heated at a temperature closer to the target set temperature Tm than 30 ° C. in the pre-cleaning, so that the responsiveness is improved.

Next, the advancing process of the cleaning nozzle 16a in step S136 will be described with reference to the flowchart of FIG. First, in step S210, the bypass valve 130 is opened, and in step S212, the main solenoid valve 60 is opened. Thereby, hot water is discharged from the bypass flow passage 44 through the bypass valve 130. In the following step S214, the detected temperature TM from the mixed temperature thermistor 156 is read. In the following step S216, it is determined whether or not the detected temperature TM is equal to or higher than the predetermined temperature. If the detected temperature TM is equal to or lower than the predetermined temperature, the process proceeds to step S218, where the cleaning nozzle 16a is advanced to the cleaning position. Then, in subsequent step S220, it is determined whether or not a predetermined time has elapsed, and the processing from step S214 to step S218 is repeatedly performed until the predetermined time has elapsed. When the predetermined time has elapsed, this processing ends. . On the other hand, step S2
When a detected temperature TM equal to or higher than a predetermined value is detected in step 16,
Proceeding to step S222, after the main solenoid valve 60 is closed, the cleaning nozzle 16a is moved to the standby position in step S224, and this processing ends.

Next, the main cleaning shown in FIG. 15 will be described. First, in step S140, the main solenoid valve 60 is opened and the bypass valve 130 is closed. Subsequent step S14
At 2, the detected temperature TM of the mixed temperature thermistor 156 is read, and at step S144, the target set temperature Tm is read. Then, in step S146, it is determined whether or not the water discharge temperature matches the target set temperature Tm.
In step S148, feedback control by controlling the mixing valve 90 is executed. At this time, since the bypass valve 130 is closed, local cleaning is performed with water discharged from the cleaning nozzle 16a at the target set temperature Tm.

Then, in step S150, it is determined whether or not the stop button 177 has been pressed. If it is determined that the stop button 177 has been pressed, the main solenoid valve 60 is closed and the bypass valve 130 is opened at the same time in step S152. Cleaning nozzle 16
At the same time as discharging the water from a, the water is discarded from the pre-cleaning nozzle 17. When the main cleaning is completed in this way,
The reason why the water is immediately discarded from the pre-cleaning nozzle 17 is to prevent water from being discharged from the cleaning nozzle 16a due to residual pressure caused by expansion and contraction of the hot water storage tank 70, that is, so-called stroking. Then, in step S154, the cleaning nozzle 16a is retracted to the cleaning position.

Next, a post-nozzle cleaning process shown in FIG. 16 is performed. First, in step S160, the main solenoid valve 60 is opened, and the bypass valve 130 is closed.
It is determined whether or not a predetermined time (for example, 3 seconds) has elapsed, and if the predetermined time has elapsed, the process proceeds to step S16.
At 4, the main solenoid valve 60 is closed and the pre-cleaning nozzle 17 is opened. As a result, the cleaning water is spouted for a predetermined time, and the vicinity of the spout of the cleaning nozzle 16a is cleaned in the same manner as in the pre-cleaning process.

In any of the pre-cleaning, pre-nozzle cleaning, main cleaning and post-nozzle cleaning, when a temperature of 45 ° C. or more is detected based on the detected temperature TM from the mixed temperature thermistor 156, the main electromagnetic At the same time as closing the valve 60, the bypass valve 130 is opened to open the pre-cleaning nozzle 1
Water is discharged from 7. This prevents high-temperature water in the hot-water storage tank 70 that has not been sufficiently reduced from being discharged, thereby enhancing safety.

Further, in the hot water adjusting device 10, since the normally open valve which is opened when the power is turned off is used as the bypass valve 130, even if the electronic control device 200 or the like breaks down, high temperature water is discharged from the cleaning nozzle 16a. It will not be done and has high security.

Further, according to the cleaning nozzle advancing process shown in FIG. 14, the detected temperature TM is learned in advance before the cleaning nozzle 16a advances to the main cleaning position. On the other hand, when a temperature equal to or higher than a predetermined value is detected, the main solenoid valve 60 is closed and the cleaning nozzle 16 is closed.
Since a is stored, the possibility of high-temperature water discharge at the main cleaning position is eliminated, and a more secure sanitary cleaning device can be provided.

In the above embodiment, the bypass valve 130
Although the waste water from the bypass flow path 44 was performed by using the three-way switching valve 1 as shown in FIG.
Forty may be used. That is, a three-way switching valve 140 is provided at the connection between the water discharge channel 42 and the bypass channel 44 leading to the cleaning nozzle 16a, and by switching the three-way switching valve 140, the water supply to the cleaning nozzle 16a and the bypass The waste water from the pre-cleaning nozzle 17 can be discharged through the pre-cleaning nozzle 17, so that the discharge from the pre-cleaning nozzle 17 can be performed more reliably.

[0066]

As described above, according to the toilet cleaning apparatus of the first aspect of the present invention, when the temperature of the hot water is higher than the predetermined temperature, the hot water is discharged to the outside through the branch pipe and is not jetted out of the cleaning nozzle. It does not discharge high-temperature water to the local area of the person, and is highly safe.

According to the second aspect of the present invention, when the high-temperature water discharge avoiding means detects a predetermined temperature or higher, water discharge from the main pipe is stopped and the cleaning nozzle is moved to the standby position. Hot water spouting is not performed toward a local part of a person, and safety is further improved.

According to claims 3 and 4, claim 1
By using a three-way switching valve in place of the on-off valve used in claim 2, the cleaning nozzle is more reliably stopped, and high-temperature water discharge at the cleaning position is prevented. I have.

According to the fifth aspect, the high-temperature avoiding means is constituted by a control device for controlling the cleaning nozzle and another protection circuit, so that even if the control device fails, the cleaning circuit is activated by the operation of the protection circuit. Avoids high-temperature water spouting and enhances safety.

According to the present invention, the cleaning end detecting means for detecting the end of the cleaning water discharge by the cleaning nozzle is provided, and when it is determined that the cleaning water discharge is completed based on the signal,
Open the on-off valve to discharge the hot water from the main pipe to the outside through the outlet of the branch pipe. Therefore, the water discharge from the cleaning nozzle is terminated immediately after the cleaning is completed, and unpleasant water discharge from the cleaning nozzle due to the residual pressure of the main pipe is not performed.

According to the seventh aspect, by using a three-way switching valve instead of the on-off valve used in the sixth aspect, the water for the cleaning nozzle can be more reliably stopped, and the water discharge due to the residual pressure can be reduced. Is prevented.

According to the eighth aspect, a pre-cleaning nozzle is connected to the branch pipe, and the ejection port of the pre-cleaning nozzle is configured to face the inner wall surface of the toilet, so that it can be used for cleaning of buttocks and the like. Using the hot water spouted in the toilet for washing, etc.
Effective use of washing water can be achieved.

According to the ninth and tenth aspects, as the on-off valve and the three-way switching valve, the solenoid valve communicating with the branch pipe when the power is not supplied is used. Even if the device according to (1) breaks down, the high-temperature water is discharged from the discharge port of the branch pipe, and is not discharged from the cleaning nozzle.

[Brief description of the drawings]

FIG. 1 is an external view showing a Western toilet equipped with a nozzle cleaning device according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view of a Western style toilet and its peripheral devices.

FIG. 3 is a schematic configuration diagram showing a hot water adjusting device.

FIG. 4 is a block diagram showing an electronic control device of the hot water adjustment device and its peripheral circuits.

FIG. 5 is a sectional view showing a first vacuum breaker;

FIG. 6 is an enlarged sectional view showing a seat portion and a valve body of a first vacuum breaker;

FIG. 7 is an enlarged perspective view showing a seat portion of the first vacuum breaker;

FIG. 8 is an enlarged sectional view showing a seat portion and a valve body of a second vacuum breaker;

FIG. 9 is an enlarged perspective view showing a seat portion of a second vacuum breaker.

FIG. 10 is a circuit diagram illustrating a protection circuit.

FIG. 11 is an explanatory diagram illustrating the operation of the first and second vacuum breakers.

FIG. 12 is a flowchart showing a pre-cleaning process.

FIG. 13 is a flowchart showing a nozzle pre-cleaning process.

FIG. 14 is a flowchart showing a cleaning nozzle advance process.

FIG. 15 is a flowchart illustrating a main cleaning process.

FIG. 16 is a flowchart illustrating post-nozzle cleaning processing.

FIG. 17 is a time chart for explaining the timing of opening and closing the main solenoid valve and the bypass valve.

FIG. 18 is an explanatory view showing a water discharge system such as a cleaning nozzle and a bypass channel according to another embodiment.

[Explanation of symbols]

 Reference numeral 5: Sanitary washing device 10: Hot water control device 12: Western style toilet 14 ... Main body 16: Cleaning nozzle device 16a ... Cleaning nozzle 16b ... Motor 17 ... Pre-cleaning nozzle 18 ... Operation panel 20 ... Operation part 22 ... Toilet seat 24 ... Toilet lid 26 ... Wash water tank 32 ... Primary water main flow path 34 ... Hot water side branch flow path 35 ... Water side branch flow path 36 ... Hot water side outflow flow path 38 ... Mixing flow path 42 ... Water discharge flow path 44 ... Bypass flow path Reference Signs List 50 pressure reducing valve 60 main solenoid valve 62 solenoid coil 70 hot water storage tank 72 heater 73 temperature control device 74 sub-tank 80 first vacuum breaker 81 case body 82 primary flow path 83 secondary flow Road 84 ... Outside air introduction passage 85 ... Valve element 86 ... Seat part 87 ... Seat part 90 ... Mixing valve 100 ... Second vacuum breaker 102 ... Primary side flow path 103 ... Secondary side flow path 05 ... valve element 107 ... seat part 110 ... flow rate adjustment unit 130 ... bypass valve 152 ... water temperature thermistor 154 ... hot water thermistor 156 ... mixed temperature thermistor 158 ... limiter thermistor 162 ... seating sensor 174 ... cleaning button 176 ... bidet cleaning button 177 ... Stop button 178 ... Temperature setting button 182 ... Water amount adjustment button 200 ... Electronic control device 202 ... CPU 204 ... ROM 206 ... RAM 207 ... Input processing circuit 208 ... Output processing circuit 210 ... Protection circuit 212 ... Resistor 214 ... Resistor 216 ... Capacitor 218 ... Integration circuit 220 ... Comparator 222 ... Resistance 224 ... Resistance 230 ... Relay 232 ... Relay coil 234 ... Switch 236 ... Diode

Continued on the front page (72) Inventor Shigeru Niki 100 Maeda-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Koito Industry Co., Ltd. 72) Inventor Keiichi Sekizawa 100 Maeda-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Koito Kogyo Co., Ltd. (56) References JP-A-5-230857 (JP, A) Jiko 3-48293 (JP, Y2) (58) ) Surveyed field (Int.Cl. ⁶ , DB name) E03D 9/00-9/16

Claims (10)

(57) [Claims] 1. A toilet cleaning apparatus for discharging hot water from a cleaning nozzle, comprising: a main pipe for flowing hot water to the cleaning nozzle; and a branch pipe branched from the main pipe and connected to the outside and having an outlet to the outside. An opening / closing valve that is provided in the branch pipe and that allows mixed hot water to flow to the outside through a discharge port by opening the valve; temperature detection means for detecting the temperature of hot water flowing through the main pipe; and detection from the temperature detection means. When the signal is equal to or higher than a predetermined temperature, the toilet is provided with: a high-temperature water discharge avoiding control means for opening and closing the open / close valve and discharging water from the main pipe from a discharge port of the branch pipe. Cleaning equipment. 2. The cleaning nozzle according to claim 1, wherein the cleaning nozzle is configured to move between a cleaning position for cleaning a local part of a person and a standby position. And opening and closing the on-off valve during standby of water discharge from the cleaning nozzle, stopping the water discharge of the main pipe when the temperature detecting means is equal to or higher than a predetermined temperature, and storing the cleaning nozzle at the standby position. The toilet cleaning apparatus according to claim 1, wherein the control is performed. 3. A toilet cleaning apparatus for discharging hot water from a cleaning nozzle, comprising: a main pipe for flowing hot water to the cleaning nozzle; and a branch pipe branched from the main pipe and connected to the outside and having an outlet to the outside. A three-way switching valve provided at a connection portion between the main pipe and the branch pipe, and selectively communicating the downstream passage on the cleaning nozzle side of the main pipe with the passage of the branch pipe; Temperature detecting means for detecting the temperature of the hot water flowing through the pipe, and when the detection signal from the temperature detecting means is equal to or higher than a predetermined temperature, the three-way switching valve is communicated to the branch pipe side so that the hot water in the main pipe is branched. And a high-temperature water discharge avoidance control means for controlling water discharge from the discharge port of the toilet. 4. The cleaning nozzle is configured to move between a cleaning position for cleaning a local part of a person and a standby position, and the high-temperature water discharge avoiding means is provided after an operation of an operation unit that commands water discharge of the cleaning nozzle. And opening the three-way switching valve to the passage side of the branch pipe while waiting for water to be discharged from the cleaning nozzle, stopping the water discharge of the main pipe when the temperature detecting means is higher than a predetermined temperature, and The cleaning device for a toilet according to claim 3, wherein a control for storing the toilet in the standby position is performed. 5. The toilet cleaning device according to claim 1, wherein the high-temperature water discharge avoiding means includes a control device for controlling a cleaning nozzle and another protection circuit. 6. A toilet cleaning apparatus for ejecting hot water from a cleaning nozzle, comprising: a main pipe for flowing hot water to the cleaning nozzle; and a branch pipe branched from the main pipe and connected to the outside, and having an outlet to the outside. An opening / closing valve that is provided in the branch pipe and that allows mixed hot water to flow to the outside through a discharge port by the valve opening operation; a washing end detecting unit that detects the end of washing and spouting by the washing nozzle; And after-wash control means for controlling to open the open / close valve and to discharge hot water of the main pipe from the outlet of the branch pipe when it is determined that cleaning and spouting is completed based on the detection signal from A cleaning device for a toilet characterized by the following. 7. A toilet cleaning apparatus for discharging hot water from a cleaning nozzle, comprising: a main pipe for flowing hot water to the cleaning nozzle; and a branch pipe branched from the main pipe and connected to the outside and having an outlet to the outside. A three-way switching valve provided at a connection between the main pipe and the branch pipe, for selectively communicating the passage of the downstream pipe of the cleaning nozzle of the main pipe with the passage of the branch pipe; Cleaning end detecting means for detecting the end of the washing water discharge by the nozzle; and opening the three-way switching valve to the branch pipe side passage when judging the end of the washing water discharge based on a detection signal from the washing end detecting means. And a post-wash control means for controlling hot water in the main pipe to be discharged from the outlet of the branch pipe. 8. The branch pipe according to claim 1, wherein a jet port at a distal end thereof communicates with a pre-cleaning nozzle provided so as to jet hot water toward an inner wall surface of the toilet. A toilet cleaning device according to the present invention. 9. The on-off valve according to claim 1, wherein the on-off valve is a solenoid valve which is opened when no current is supplied.
A toilet cleaning device according to any one of claims 8 to 10. 10. The three-way switching valve according to any one of claim 3, claim 4, claim 5, claim 7, or claim 8, wherein the three-way switching valve is constituted by a solenoid valve communicating with the branch pipe when electricity is not supplied. A cleaning device for a toilet according to claim 1.