JPH023860B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a sanitary washing device, and particularly to a water supply heating device for supplying hot water at a comfortable temperature to a spout section provided in the device for washing private parts and other body parts.

Conventionally, a water supply heating device for sanitary cleaning equipment generally includes a sheathed heater or the like as a heating section in a hot water storage tank that stores hot water obtained by heating cleaning water, and a capillary to control the power supply to the sheathed heater. A thermoswitch is installed to automatically adjust only the hot water temperature regardless of changes in outside temperature. However, in such a structure, the temperature detection section detects only the temperature of the hot water in the hot water storage tank and controls the energization to the sheathed heater, resulting in the following inconvenience. Unless the set temperature of the hot water in the hot water storage tank is changed, for example in winter, when the water passes through the path from the hot water storage tank to the washing water spouting part, it will be exposed to the low temperature of the outside world and the temperature of the washing water will drop, causing the water to be jetted out from the spouting part. The problem is that the washing water is not at an appropriate temperature, making it impossible to perform a comfortable washing process, and conversely, in the summer, even if the washing water temperature is kept low, it is possible to perform a comfortable washing process. Since the sheathed heater applies the set amount of heat regardless of the relatively high temperature of the cleaning water, the resulting high temperature inevitably results in an unnecessary amount of heat being wasted, making it difficult to save electricity.

The present invention was created in order to eliminate the above-mentioned drawbacks of the water supply heating device part of the conventional sanitary cleaning equipment, and its purpose is to automatically adjust the temperature of hot water in the hot water tank according to fluctuations in outside temperature. The purpose is to enable comfortable washing by changing the amount of water.

The basic configuration of the present invention is to indirectly detect the temperature of the outside world by detecting the temperature of the water flowing into the hot water storage tank. By installing a temperature control device that controls the energization to the heating part so that the hot water temperature is low when the This compensates for the drop in hot water temperature.

Hereinafter, a detailed description will be given based on an embodiment shown in the attached drawings. FIG. 1 shows a sanitary cleaning device according to the present invention, and in the figure 1 is a sanitary appliance main body, and in this embodiment, a toilet bowl, 2 2 is the main body of the water heating device mounted on the rear of the top of the toilet so as to straddle the toilet bowl 1, 3 is the heating toilet seat, and 4 is the toilet lid. Both the heating toilet seat 3 and the toilet lid 4 are above and below the water heating device main body 2. It is pivoted for free movement. Further, 5 is a water supply tank for toilet flush water. FIG. 2 shows a front view of the main body 2 of the water heating device, and as shown in the figure, the main body case 2a is formed in a shape when viewed from the front side of the toilet bowl 1, and expands and contracts approximately at the center within the main body case. It has an ejection part 2e formed from a flexible nozzle. In addition, in this embodiment, a warm air drying device (not shown) is also included in the main body case 2a so that the private parts can be dried with warm air after washing the private parts. , and a main control circuit section of a hot water temperature control device A, which will be described later, are similarly built into the main body case 2a. Further, in FIG. 1, reference numeral 2b is an outlet for the telescopic nozzle provided in the main body case 2a, and 2c is a hot air outlet provided adjacent to the outlet for blowing out hot air from the hot air drying device. The main body 2 of the water heating device is fixed to the rear part of the toilet bowl 1 with mounting bolts 2d, and the connection fittings (not shown) attached to the lower back of the main body case 2a connect the water supply source and the flush water flow path in the device. The water pipe (not shown) that connects the connecting fitting and the water supply source may be provided with necessary equipment such as a water stop valve, strainer, and check valve in the middle of the pipe. In addition, a hot water storage tank 6 is built into the main body 2 of the water supply heating device, and has a water inlet pipe that communicates with the above-mentioned connecting fittings, and has a built-in heating section made up of a sheathed heater, etc., and is an exploded perspective view of the hot water storage tank 6. is shown in Figure 3, where 7 is the lid of the hot water storage tank;
8 is a gasket interposed between the hot water tank 6 and the lid body 7;
are each formed in a half-shape, and are attached to the lid body 7 by screws 10.
This is a holding member that presses and fixes the hot water tank 6 to the hot water storage tank 6. In addition, as shown in FIG. 4, the lid 7 has an inlet pipe 11 that connects to the connection fitting on the water supply side and is integrally arranged with the opening end located near the bottom of the hot water storage tank 6. A hot water outlet pipe 1 attached to the
2 is spaced from the mounting position of the water inlet pipe 11 by a required amount, and is mounted so that the opening starting end is flush with the back surface of the lid body 7. That is, the open end of the water inlet pipe 11 forms the water inlet 11a of the hot water storage tank 6, and the opening end of the hot water outlet pipe 12 forms the hot water outlet 12a.

Therefore, due to the mutual arrangement of the water inlet 11a and the hot water outlet pipe 12, the water flowing from the water inlet pipe 11 flows out from the water inlet pipe 11 of the hot water tank 6, that is, from the lower part of the hot water tank 6, and the water flows into the sheathed heater described later. The hot water that has been heated by the heating section 14 consisting of As the water moves, it is heated by the heating section and becomes hot water.

Furthermore, 13a is a first temperature sensor installed in the water inlet pipe 11 to detect the inlet water temperature. In this embodiment, a thermistor with a negative characteristic to which a lead wire is connected is used as the detection element. Other products include positive temperature coefficient thermistors, thermocouples, platinum temperature zones, transistors using PN junctions, and PN
A diode or the like using a junction may also be used.
As shown in the figure, it is preferable that the thermistor be located slightly above the top surface of the lid 7 in order to reduce the thermal influence of the hot water stored in the hot water storage tank 6. 13b is a second temperature sensor for directly detecting the hot water temperature in the hot water storage tank 6, which has a negative characteristic thermistor at the tip of the thin-walled steel pipe, similar to the first temperature sensor 13a; It is arranged slightly above the middle part of the tank 6 and has a configuration that can accurately detect the temperature of the hot water to be discharged from the tap pipe 12.

Furthermore, 14 is a sheathed heater that heats the water in the hot water storage tank 6 and constitutes a heating section, and is formed so that a portion located near the bottom wall of the hot water storage tank 6 generates heat, and 15 is a sheathed heater provided at the top of the hot water storage tank 6. This is a float switch that prevents dry firing, and the switch is composed of a guide cylinder 16 with a reed switch disposed at the bottom inside thereof, and a float 17 with a magnet that floats and sinks according to the water level while being guided by the guide cylinder 16. There is.

Next, the flow of water supplied from the water supply source will be summarized with reference to the flowchart shown in FIG. When the on-off valve 51, which is operated by the provided on-off handle 2f, is opened, the water flows into the apparatus. Thereafter, as shown in the figure, the water reaches the distribution section 52 and is divided into two directions by the distribution section 52. That is, one is hot water that flows from the distribution section 52 through the flow rate adjustment valve 53 into the hot water storage tank 6, is heated to a set temperature by the sheathed heater 14, and is gradually discharged from the hot water outlet pipe 12 through the intake valve 54,
The water is ejected through the vacuum breaker valve 55 to the ejection part 2e consisting of a telescopic nozzle to clean the private parts, and the water going to the other side is discharged from the outlet 56 via the vacuum breaker valve 55', and this discharged water is The structure is such that it branches into one that cleans the tip of the nozzle.

Through the water path described above, the cleaning water is sprayed locally from the spouting part 2e during use, but water flows into the hot water tank 6 from the water supply source 50 and is heated in the tank by the water flow. The water temperature in the hot water tank 6 decreases because the warm water is pushed out and flows out of the tank, or due to heat radiation from the hot water tank 6. At this time, the sheathed heater 14 is energized and controlled in order to keep the temperature of the cleaning water ejected by the temperature control device A constant, and the control will be explained below based on the control circuit shown in FIG. .

First, when the temperature of the hot water in the hot water tank 6 decreases due to water flowing into the hot water tank 6 during use or due to long-term storage, the first and second temperature sensors 1
Thermistor Rth-1, which constitutes 3a and 13b,
Rth-2, especially the resistance of the thermistor Rth-2 of the second temperature sensor 13b increases, and the combined resistance of both (Rth
= Rth-1+Rth-2) increases, and therefore the potential at point A, which is divided by the thermistor's combined resistance Rth and variable resistor Rc in the figure, becomes point B, which is divided by resistor _R1 and resistor _R2 . The IC that constitutes the voltage comparator is lower than the potential of
(I) is activated and the potential at point C is high (high level)
Become.

When the output of IC (I) becomes high level, current flows into the base of the transistor Tr, the transistor Tr becomes conductive, and the light emitting element L such as a light emitting diode connected to its collector emits light.
When the light-receiving element Cd of the Cds cell receives the light beam, the internal resistance of the light-receiving element Cd decreases, the tri-ac T is triggered and becomes conductive, and current flows to the sheathed heater 14, that is, the heating element Rh, and the hot water in the tank is is heated.

On the other hand, as the temperature of the hot water in the tank increases, the resistance value of the composite resistance Rth of the thermistor becomes smaller, and IC(I)
The potential at point A becomes higher than the potential at point B, and IC(I)
operates, and the potential at point C becomes low (low level).

When IC (I) goes low level, the transistor
Tr is cut off, the light emitting element L stops emitting light, the resistance of the light receiving element Cd increases, and the trigger T loses its trigger and becomes cut off, and the electricity to the heating element Rh is stopped and the hot water is heated. Canceled. When adjusting the temperature of hot water,
Adjust variable resistance Rc for temperature adjustment.

That is, if the resistance of the variable resistor Rc constituting the temperature setting section is reduced, the potential of point A will not become higher than point B unless the combined resistance Rth of the thermistor becomes smaller. In other words, as the temperature of the hot water becomes higher, the combined resistance of the thermistor increases.
Rth becomes small and current is applied until the potential at point A becomes higher than the potential at point B. That is, the temperature is set to high temperature. On the contrary, if the resistance of the variable resistor Rc is increased, the temperature can be set to a lower temperature. Therefore,
The hot water temperature can be set steplessly to your desired temperature.

Although the cleaning water temperature can be controlled by the configuration of the control circuit as described above, the first temperature sensor 1
3a is installed inside the water inlet pipe 11 and detects the temperature of the water that is about to flow into the hot water storage tank 6. Detecting the temperature of the water flowing down the water inlet pipe 11 is done indirectly. This is not only synonymous with detecting the temperature of the outside world, but also because the water in the water inlet pipe 11 is a fluid to be heated and will later be ejected from the ejection section as cleaning water, so controlling the energization of the heater 14 is necessary. This is more effective than directly sensing the outside temperature. Therefore, the temperature of the inflowing water, which is affected by the temperature of the outside world, is detected, and the temperature drop of the washing water from the hot water storage tank 6 to the spouting part 2e is calculated taking into consideration the temperature of the inflowing water and also the temperature of the outside world. It is an object of the present invention to compensate and maintain a comfortable washing water temperature, and this will be explained with reference to the same circuit diagram.

First, when the inlet water temperature is low, the resistance value of the thermistor Rth-1 of the first temperature sensor 13a provided in the water inlet pipe 11 is large, so the second temperature sensor 1 in the hot water storage tank 6
The heating element Rh is energized until the resistance value of the thermistor Rth-2 of 3b becomes smaller, in other words, until the hot water temperature becomes higher. Conversely, when the inlet water temperature is high, the thermistor Rth- of the first temperature sensor 13a
Since the resistance value of the thermistor Rth-2 of the second temperature sensor 13b is small, the power supply to the heating element Rh is stopped at a stage when the resistance value of the thermistor Rth-2 of the second temperature sensor 13b is large to some extent, in other words, before the temperature of the hot water becomes too high.

Therefore, when it is cold such as in winter, the hot water is discharged from the hot water tank 6 to the spouting part 2.
The temperature of the hot water will drop before it is spouted from the spouting part 2e, but since the hot water in the hot water storage tank 6 is automatically adjusted to a slightly higher temperature, the temperature of the hot water spouted from the spouting part 2e will drop, making it comfortable. Once the temperature is reached, you can wash your private parts with warm water at a comfortable temperature. Also, in hot weather such as summer, the temperature drop is small, but the hot water in the hot water storage tank 6 is automatically adjusted to a lower temperature than in winter, so private parts can be washed with hot water at a comfortable temperature.

As mentioned above, FS is the float switch 15 installed at the top of the hot water tank 6 to prevent dry heating.When the hot water tank 6 is full of water, the float 17 is in the raised position and the reed switch contacts open.
When the water level drops, the float 17 is lowered to close the reed switch contact, which is installed in parallel with the thermistor Rth as shown in the circuit diagram.

Therefore, when the hot water storage tank 6 is full of water, the float switch FS is open, so IC(I) controls the energization to the heating element Rh according to the change in resistance of the thermistor Rth due to the change in temperature of the hot water. do.

If the water level in the hot water tank 6 drops for some reason, such as when water leaks from the hot water tank 6, the float 17 will move down as the water level falls and the reed switch will close, thereby turning on the float switch FS.
closes. In this state, the potential at point A of IC (I) becomes higher than the potential at point X, IC (I) becomes low level, and as mentioned above, the transistor
Tr is cut off, the light emitting element L ceases to emit light, the resistance of the light receiving element Cd increases, the trigger of the triact T disappears, and the power supply to the heating element Rh is stopped. Furthermore, this float switch
FS may be provided in series with the heating element Rh. In this case, the float switch FS is configured so that it opens when the water level falls and closes when the water is full.

In the figure, TR is a transformer, SW is a main switch, and BS is a bimetal switch for overheat prevention.

Note that the present invention can be modified in various ways.

For example, in the above-described embodiment, the main body of the water supply heating device including the spouting portion is attached to the toilet bowl, but the spouting portion and the main body of the water heating device may be separated and only the spouting portion may be attached to the toilet bowl. In this case, the main body of the water supply heating device may be installed on the floor of the toilet.

In addition, a toilet bowl is used as the main body of the sanitary appliance, and it is implemented in a sanitary cleaning device for private cleaning, but a washbasin,
It can also be applied to sanitary cleaning devices for wash basins, hand washes, hair washes, eye washes, etc. using hand washers, hair washers, eye washers, etc. Furthermore, a planar heating element or the like may be used as the heating section and attached to the outer surface of the hot water storage tank to heat the water in the hot water storage tank.

In addition, the power to the heating section can be turned on by turning on the tri-attack
Although the control is performed using OFF control, it may also be controlled using phase control, time proportional control, or the like. instead of triage
SCR etc. can also be used.

With the configuration as described above, the present invention has the following effects.

(1) The control circuit of the temperature control device detects the incoming water temperature, which is affected by the outside temperature, in advance to compensate for the temperature drop between the hot water storage tank and the spouting part, and when the incoming water temperature is high, The temperature of the hot water in the hot water storage tank is kept low, and when the incoming water temperature is low, the hot water temperature is raised, and the power supply to the heating part is controlled so that the temperature of the washing water that comes out from the spout and touches the body is at an appropriate temperature. The body can be washed comfortably at all times regardless of the external temperature.

(2) When the inlet water temperature is high, that is, when the outside temperature is high, the amount of heating is automatically reduced, resulting in excellent power saving.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the sanitary cleaning device according to the present invention, FIG. 2 is a partially cutaway front view of the main body of the water heating device, and FIG. 3 is an exploded perspective view of the hot water storage tank.
Figure 4 is a side view showing the internal structure of the hot water storage tank, Figure 5
The figure is a flowchart showing the flow of water in the sanitary washing device, and FIG. 6 is a diagram showing the control circuit of the temperature control device. 1... Sanitary appliance standard, 2... Water supply heating device main body, 2e... Spout part, 6... Hot water storage tank, 11a...
Water inlet, 12a... Water outlet, A... Temperature control device.

Claims (1)

[Claims] 1. A sanitary appliance body equipped with a spout section for washing the body, and a water supply heating device body that supplies hot water to the spout section, the main body of the water supply heating device having a water inlet connected to a water supply source and a water inlet communicating with the spout section. a hot water storage tank having a hot water outlet; a heating unit that heats water in the hot water storage tank; a temperature sensor that detects the temperature of water supplied from the water supply source; Equipped with a temperature control device that controls energization to the heating section so that the hot water temperature in the hot water storage tank is controlled to be low when the temperature is high, and the hot water temperature in the hot water storage tank is increased when the detected incoming water temperature is low. A sanitary cleaning device featuring: