JPS6146622B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a private parts cleaning device, and its purpose is not only to completely guarantee safety even if the controller that controls the temperature of the cleaning water breaks down, but also to ensure that the temperature of the discharged water does not change due to the change in the temperature of the water entering the water. To provide a private part washing device which is simple in structure and inexpensive and can surely maintain temperature stably during correction and water stoppage. Hereinafter, the present invention will be explained in detail based on illustrated embodiments. A in the figure is a frame body, which consists of a seat 1 formed in the shape of a conventional toilet seat and a function accommodation cover 2 provided at the rear of the seat 1, and the seat 1 is equipped with a cleaning nozzle a. The cover 2 is slidably attached to the cover 2. The cleaning nozzle a is bored in the piece 3, and its tip opening faces the center of the seat 1, preferably toward the user's anus or genitals when the user is sitting or straddling the seat 1. It is attached to the functional unit housing cover 2 so that the rear end opening faces obliquely upward to the rear. A water supply line b and a controller c are provided inside the functional unit housing cover 2. One end of the water supply line b protrudes to the rear of the cover 2 and forms a connection to a water supply source such as a water pipe, and the other end is connected to a water supply source such as a water pipe. An injection nozzle 4 is formed by protruding from the front surface of the cover 2. Further, in the middle of the water supply line b, a pressure reducing valve e integrally equipped with a solenoid valve d, a heating can f, a water storage can g, and a vacuum breaker h which also serves as a backflow prevention valve are interposed in order from the upstream side. The electromagnetic valve d is energized or stopped by an operation knob 6 protruding from a suitable position, for example, a side surface of the functional part housing cover 2 of the frame A, and when energized, water flows through the water supply line b to the pressure reducing valve e. heated can f
It is becoming more and more fluid. Further, a knob 7 for adjusting the set pressure of the pressure reducing valve e is also protruded from the functional part housing cover 2. The heating can f is constructed by closing the above-mentioned opening of a copper cylindrical body with an open end with a lid 9 in which a tube-rod-shaped ceramic heater 8 is attached in a penetrating manner in the center, and a hole 10 that passes through the ceramic heater 8 in the axial direction. The water is connected to the upstream side of the water supply line b via a conduit 12 made of a copper pipe and provided in a protruding manner at a position as far as possible from the outlet of the hole 10, that is, the water inlet 11 to the heating can f. and contact the water storage room g. A correction sensor 13, which will be described later, is provided in the heating can f near the water inlet 11.
The water tank g is composed of a closed cylindrical body made of copper and has a volume capable of storing enough cleaning water to be jetted from the cleaning nozzle a for about 10 seconds, and is brazed to the heating can f. There is. The pipe line 12 that connects the water storage can g to the heating can f extends into the water storage can g so as to penetrate through one side wall of the water storage can g and reach near the other side wall. A safety bimetal switch 14 is mounted on the outer surface of the portion outside the passageway 12. In addition, a water outlet hole 16 is provided on the circumferential surface of the water tank g at a position farthest from the outlet 15 of the pipe line 12. It is in contact with nozzle 4. The ceramic heater 8 has a rod-tube-shaped base 8' with holes 10 drilled in the axial direction, which is made of alumina, and has a heating element 17 and a sensor 18 on its surface.
are printed and placed next to each other, and furthermore, an extremely thin alumina layer is coated thereon, and the lid 9 of the heating can f is attached to the center of the lid 9 through this. The ceramic heater 8 is inserted into the heating can f by screwing the lid 9 onto the opening of the heating can f so as to have an appropriate gap with the inner peripheral surface of the heating can f. The heating element 17 and the sensor 18 are provided so as to be located inside the heating can f when the lid 9 is screwed onto the heating can f. It has 19. The heating element 17 and sensor 18 of such heater 8
is electrically connected to the controller c and electrically connected to the previous power source via the controller c, and the heating element 17 is always energized. A thyristor is used as the controller c, and the heating element 17 of the heater 8 is controlled by a signal from the sensor 18.
By increasing or decreasing the effective value of the current flowing through the heating element 17
control the output of The safety bimetal 14 is to prevent the wash water from becoming overheated due to a failure of this controller c, and the set temperature is set to 50°C, and the temperature on the surface of the pipe line 12 reaches 50°C. It is configured to stop energizing the solenoid valve d and cut off the water supply. Incidentally, the bimetal switch 14 can also be attached to the surface of the heating can f. That is, if the controller c fails, the temperature of the water discharged from the heating can f, in other words, the temperature at position ○ and b in FIG. 3 will be as shown in the curve of graph 1 below. Surface temperature of heating can f or pipe line 1 at position ○B
The surface temperature of No. 2 is as shown in the curve of Graph 1. In addition, the temperature of the water discharged from the water tank g, in other words, the temperature of the cleaning water spouted from the cleaning nozzle a is shown in graph 1.
It will look like a curve. Therefore, as is clear from graph 1, if the set temperature of the bimetal switch 14 attached to the surface of the conduit 12 at position ○ and B is set to 50°C, the temperature on the surface of the bimetal switch 14 will reach 50°C within 4 seconds. Even if we include the delay in the operation of the bimetal switch 14 and the delay in the operation time of the solenoid valve d, the water discharge can be shut off within 7 seconds. At that time, the temperature of the water discharged from the heating can f has reached nearly 70°C, but the temperature of the water discharged from the water storage can g is below 42°C, ensuring safety in the event that controller c fails. I can do it. The correction sensor 13 is provided in order to solve the problem that the discharge water temperature changes with respect to the inlet water temperature as shown in graph 3 below, and to ensure that the cleaning water is discharged at a stable temperature even when it is used after not being used for a long time. The correction sensor 13 has the characteristics shown in graph 2 below, and is installed in series with the sensor 18 at a position close to the water inlet 11 inside the heating can f, and connected to the bridge of the circuit so that the water discharge temperature is 38°C. Adjust resistance. The reason for the problem that the discharge water temperature changes with respect to the incoming water temperature is that the sensor 18 is buried in the alumina layer next to the heating element 17, so it does not only sense the discharge water temperature, but directly from the heating element 17. This is because the amount of heat received from the heating element 17 increases when the inlet water temperature is low and high wattage is required. In other words, the temperature of the sensor 18 itself will be higher even if the temperature of the discharged water is lower than when the wattage is low.On the other hand, the operating temperature of the sensor 18 itself is determined by the circuit configuration of the controller c, so even if the temperature of the discharged water is low, the temperature of the sensor 18 itself will be higher. Once the operating temperature of 18 is reached, the temperature rise is suppressed and the discharge water temperature decreases, and as shown in graph 3, the difference in the discharge water temperature is about 9 °C compared to the 30 °C difference in the inlet water temperature. It appears. The characteristics of the sensor 18 are as shown in graph 4, and the temperature of the sensor 18 itself with respect to the incoming water temperature,
The relationship between input power and discharge water temperature is shown in Table 1 below. This is when the sensor temperature is 46℃ or 56Ω.
This is because the circuit is configured to turn on and off, and if the temperature rises even slightly above 46℃, the heater will turn off.
This is because if the temperature drops even slightly below OFF and 46°C, it becomes sensitive to ON. Therefore, by inserting a correction sensor, the circuit configuration is changed so that it turns on and off when the combined resistance of sensor resistance + correction sensor resistance = 80Ω. Then, when the inlet water temperature is 30℃, the outlet water temperature is
When the temperature is set to 38℃ (see Tables 1 and 2), the sensor temperature becomes 46℃ (sensor resistance is 56Ω), which is the same as when no correction sensor is installed. However, when the inlet water temperature becomes 5℃, the temperature of the correction sensor increases somewhat to 12℃, but at that time it becomes 23Ω, which is a 1Ω resistance decrease. However, since the circuit is configured with a combined resistance of 80Ω, it will not turn on or off unless the sensor resistance becomes 57Ω, resulting in a sensor temperature of 50.5℃, which is a little high even though a lot of heat from the heater is transferred to the sensor. It's starting to only turn on and off at times. In other words, when the correction sensor is not attached, the discharge water temperature
What used to be 30.5℃ becomes 38℃. In this way, the discharge water temperature remains constant even if the inlet water temperature changes.

【table】

[Table] This correction sensor 13 can be calculated as shown in Table 3 below by inserting an adjustment resistor 20 in parallel to the elementary correction sensor 13' as shown in FIG. As the linearity is also clear from 5, the required temperature gradient can be set arbitrarily,
Also, the absolute value can be set to any required characteristic by inserting a series adjustment resistor 21.

[Table] From the above results, it can be understood that the stability of the water discharge temperature against changes in the incoming water temperature during continuous water discharge can be ensured. Next, when flushing water is discharged after a long period of non-use (e.g. 30 minutes or 20 hours), the temperature of the flushing water should be either too hot (over 40°C) or too cold (36°C).
below). Therefore, the heating can f and the water storage can g are made of a metal with high thermal conductivity and are connected to each other in order to keep the heat insulated. However, since the heating element 17 is always energized, when the water is stopped, the temperature of the heating can f is written on the sensor temperature of 46°C (see Table 1), and the experimental results show that the temperature inside the heating can f and inside the water storage can g is Although each can body is made of a metal with high thermal conductivity, the temperature difference is 4°C due to the temperature gradient, and the temperature inside the water tank g is 42°C. Therefore, the temperature of the discharged water is The temperature would be around 42 degrees Celsius, which would be too hot. On the other hand, if the electrical conductivity to the heating element 17 is cut off when the sensor is not in use, cold water will initially come out the next time it is used (water near 0°C in winter), making it practically unusable. 13 also solves this problem. That is, as can be seen from Table 2 above, the sensor resistance +
The circuit is designed to work with the corrected sensor resistance = 80Ω. When the water is stopped, the temperature of the portion marked with position ○ and b in FIG. 3 becomes equal to that of the other portions of the heating can f, so that both the sensor 18 and the correction sensor 13 settle to approximately the same temperature. On the other hand, as is clear from the composite resistance characteristic in graph 6 when the sensor and correction sensor have the same temperature, when the composite resistance becomes 80Ω, the temperature is 42.5°C.
Experimentally, the temperature difference between the inside of the heating can f and the inside of the water storage can g is 4.
℃, so the temperature inside the water tank g will settle down to about 38℃. By providing the correction sensor 13 as described above, it becomes possible to stably maintain the temperature of the cleaning water when the water is stopped. The values for stabilizing the discharge water temperature in response to changes in the incoming water temperature using the correction sensor described above, and for stabilizing the discharge water temperature when the water is stopped for a long time, will vary due to the difference in the correlation between the sensor and the heater, but as mentioned above. As explained with respect to graph 5, since the slope of the resistance of the correction sensor with respect to temperature can be arbitrarily set, it can be adjusted within a practically usable range. In addition, in order to keep the temperature of the water tank g constant, in addition to using a correction sensor, the temperature of the water tank g can be sensed by another sensor, and a separate control circuit can be configured. Since there is a tendency for the temperature to rise in some cases, a so-called And circuit may be considered as a circuit that suppresses only the upper limit of the temperature. Since the present invention is configured as described above, even if the controller malfunctions, there is no risk that cleaning water heated above the set temperature will be sprayed from the cleaning nozzle, and its safety can be completely ensured. It can be guaranteed. In addition, the discharge water temperature does not change with changes in the inlet water temperature, and regardless of changes in the inlet water temperature,
A stable water discharge temperature can always be ensured, and even after a long period of non-use, cleaning water at an appropriate temperature can be immediately discharged. Furthermore, there is no risk that the stored water will overheat during a water outage, and then when the user turns on the switch when the water outage is resolved, overheated hot water will come out, and if used intermittently, the heater's heat will There is no risk of overheated water coming out due to inertia.
It can be used with confidence. Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the local cleaning device of the present invention,
Fig. 1 is a partially cutaway plan view of a toilet seat equipped with the device of the present invention, Fig. 2 is a partially cutaway side view of the same, Fig. 3 is an enlarged longitudinal sectional front view of the main parts of the device of the present invention, and Fig. 4 is a partially cutaway plan view of the toilet seat equipped with the device of the present invention. FIG. 5 is a longitudinal sectional view taken along the line X--X in the figure, and is a circuit configuration diagram of a correction sensor which is a main component of the device of the present invention. In the figure, a...Cleaning nozzle, b...Water supply line,
f... Heating can, g... Water storage can, h... Vacuum break valve, 8... Ceramic heater, 11... Water inlet, 12... Piping, 13... Correction sensor, 14
... Bimetal switch, 17 ... Heating element, 18
……sensor.

Claims (1)

[Claims] 1. A heating can made of a metal with high thermal conductivity is placed in the middle of the water supply line that connects the water supply source and the cleaning nozzle, and a heating can made of a metal with high thermal conductivity is installed in the middle of the water supply line that connects the water supply source and the cleaning nozzle. A water storage can with a capacity that can store water for about 10 seconds is installed adjacent to each other with the former on the upstream side, and the two are connected by a conduit made of a metal pipe with high thermal conductivity. A bimetal switch is installed on the surface of the conduit or the heating can, and a ceramic heater in which a heating element and a sensor are embedded adjacent to each other near the outer surface of a base made of alumina is provided in the heating can. A private parts cleaning device comprising a sheathed heater and a sensor arranged to simultaneously sense the surface temperature of the sheathed heater and the temperature of water discharged from a heating can, and a correction sensor near a water inlet.