JPH0149860B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a cleaning spray device, and more particularly to a cleaning spray device that is used for cleaning the area to be cleaned after using a toilet, a bidet, and the like.

Conventional configurations and their problems Conventional cleaning nozzles include systems in which the injection port is composed of one or more simple openings and the injection direction of the jet stream is fixed; There was a method that changed the injection direction.

In the case of the method using the fluid oscillation element, the jet flow intensity is adjusted by continuously changing the supply pressure and flow rate by controlling the flow rate control valve or motor rotation speed. With this method, increasing the supply pressure and flow rate increases the oscillation frequency, but since the change is continuous,
There is a problem in that when a strong jet flow is set, the impact of the jet flow is felt to be weak, making people feel uneasy about the cleaning performance.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, and uses a fluid oscillation element in the cleaning nozzle, divides the supply pressure and flow rate to the fluid oscillation element into multiple stages, and injects the oscillation element. It is an object of the present invention to provide a cleaning device that improves the cleaning effect and the satisfaction of use by dividing and controlling the flow frequency band into multiple stages.

Structure of the Invention In order to achieve the above object, the present invention uses a fluid oscillation element in a cleaning nozzle, and groups the supply pressure and flow rate to the fluid oscillation element into a plurality of groups by controlling a cleaning water supply device. This allows for decomposition control of the jet flow frequency.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a cleaning nozzle, and a fluid oscillation element 2 is attached to the tip of the cleaning nozzle, which performs self-oscillation due to flow rate negative feedback using a monostable element. The cleaning nozzle 1 is composed of a movable nozzle 3 that is retracted by the elastic force of a spring when not cleaning, and protrudes by water pressure when cleaning, and a fixed nozzle 5 attached to the toilet seat main body 4.
The toilet seat main body 4 is installed on the toilet bowl 6 and is composed of a heated toilet seat 7 and a washing machine unit 8. The washing machine unit 8 is equipped with a power switch 9 and a water pressure adjustment knob 10.
is installed. 11 is the lid of the toilet seat.

In FIG. 3, the fluid oscillation element 2 is monostable and self-oscillates due to negative feedback of the flow velocity type. The fluid oscillation element 2 has a supply port 12 that generates jetting, a setback amount from the downstream end of the supply port to the end of the supply port 12, a stable wall 13 parallel to the jetting direction, and a stable wall 13 facing the stable wall 13 in the jetting direction. an output path 15 consisting of an unstable wall 14 having a divergence angle;
Output port 1 that spouts fluid from the output path 15 to the atmosphere
6, and a control port 17 provided on the unstable wall 14 side,
A control flow path 18 that sends fluid to a control port 17. 19 is a supply path communicating with the supply port 12;
A spring 20 has a biasing force that allows the movable nozzle 3 to be retracted into the fixed nozzle 5 when the main flow path 21 is not pressurized and is not being cleaned.

In FIGS. 4 and 5, the fluid oscillation element 2 has a three-member structure including a base material 22, a seal plate 23, and a lid 24. The seal plate 23 is provided with a negative pressure generation hole 25 provided near the stabilizing wall 13 of the output path 15 and a signal transmission path 26 for transmitting pressure between the negative pressure generation hole 25 and the control flow path 18. .

FIG. 6 shows the water circuit configuration of the toilet seat. 27 is a cleaning pump which is a cleaning water supply means, and its suction side flow path 28 communicates with a water storage tank 29 such as a cistern.
In addition, the discharge side flow path 30 includes an on-off valve 31 and a hot water tank 3.
It communicates with the cleaning nozzle 1 via 2. The water pressure adjustment knob 10 is used to perform operations such as starting and stopping the washing pump 27, controlling the rotation speed, and turning on and off the on-off valve 31 via the washing water supply control device 33. Rotation speed control divides the rotation speed into two areas,
This is a control method in which one is a low/medium speed rotation region and the other is a high speed rotation region, and the rotation speed changes discontinuously between the two regions.

FIG. 7 shows a jet flow pattern model when the pump rotation speed is low and medium speed, that is, when the frequency of the fluid oscillation element is low/medium frequency. The jet stream changes continuously from side to side in the direction of arrow _F1 .

FIG. 8 shows a jet flow pattern model when the pump rotation speed is high, that is, when the frequency of the fluid oscillation element is high. The jet stream is ejected at a high velocity in the direction of arrow _F2 and at a high frequency from side to side.

FIG. 9 shows a control circuit which is a washing water supply control device. 34 is a phase control triac, and 35 is a variable resistor with a switching contact that switches the rotational speed range and controls the rotational speed at the same time. 36 is a full-wave rectifier circuit for driving the pump motor.

FIG. 10 is a graph showing the relationship between pump rotational speed, fluid oscillation element supply pressure P, and frequency f. _PL ,
f _L indicates the supply pressure and frequency at low and medium speeds, and P _H and f _H indicate the supply pressure and frequency at high speeds.

First, the oscillation effect of the fluidic element in the above configuration will be explained. The flow passing through the supply path 19 and ejected from the supply port 12 first flows toward the stable wall 13 side. Then, the pressure in the negative pressure generating hole 25 provided in the seal plate 23 becomes low due to the ejector action of the high-speed jet. This low pressure is transmitted to the control port 17 via the signal transmission path 26 and the control path 18, and makes the unstable wall 14 side of the jet a negative pressure. The jet then separates from the stable wall 13 and becomes a flow attached to the non-stable wall 14. As a result, the jet flow from the negative pressure generation hole 25 disappears, the low pressure in the negative pressure generation hole 25 is eliminated, and the jet flow returns to the stable side 13 side. The above operation is then repeated to generate oscillation. The oscillation frequency at this time is determined by the negative pressure generated in the negative pressure generation hole 25 due to the ejector action of the jet flow, since the fluid resistance of the control signal transmission path composed of the signal transmission path 26 and the control flow path 18 is constant. Depends on size. That is, as the supply flow rate increases, the generated negative pressure also increases, the switching of the jet stream becomes faster, and the oscillation frequency also increases.

When cleaning, turn on the power with the power switch 9, then turn the water pressure adjustment knob 10 to open the on-off valve 31. The movable nozzle 3 protrudes from the fixed nozzle 5 against the spring force due to the internal pressure of the main flow path 21.

First, if you want to perform cleaning with a soft sensation, put a fixed resistor connected in series with the variable resistor 35 on the _R1 side, which has a higher resistance value. Triack 3
Since the conduction angle is controlled by the fixed resistor _R1 and the variable resistor Rv, the rotation speed of the cleaning pump 27 is controlled in a relatively low rotation range. Therefore, the supply pressure and oscillation frequency of the fluid oscillation element 2 are P _L , as shown in FIG.
f _L is the value in the low region. As a result, the pattern strength of the jet flow becomes weak as shown in FIG. 7, and soft cleaning can be performed.

Next, if you want to clean with a powerful sensation,
A fixed resistor connected in series with the variable resistor 35 is placed on the _R2 side, which has a lower resistance value. The conduction angle of the triax 34 becomes large, and the rotational speed of the cleaning pump 27 is controlled in a high rotational speed region. Therefore, fluid element 2
The supply pressure and oscillation frequency of P _H and oscillation frequency are shown in Fig. 10.
f _H is the value in the high region. As a result, the jet pattern strength becomes strong as shown in FIG. 8, and powerful cleaning can be performed. In particular, as in this embodiment, the supply pressure and frequency of the fluid oscillation element 2 increase simultaneously, so the sense of intensity becomes even greater.

Effect of the invention 1: The areas of soft cleaning and strong cleaning have been changed into steps, and the area of use is clearly defined, so customers do not have to worry about making a selection. Furthermore, since a frequency jump region is provided between the low frequency region and the high frequency region, the difference in strength during use is significant.

2. Supply pressure and frequency increase simultaneously. Further, as the frequency increases, the flow velocity distribution at the center of the jet becomes larger, and the feeling of strength of the jet and the cleaning effect during high-speed rotation become higher.

[Brief explanation of drawings]

Fig. 1 is an external view showing an embodiment of the cleaning device of the present invention, Fig. 2 is an enlarged perspective view of the washing nozzle, Fig. 3 is an enlarged sectional view of the washing nozzle, and Fig. 4 is a broken cross section of the fluid oscillation element. 5 is an exploded perspective view of the fluid oscillation element, FIG. 6 is a diagram of the principle of construction of the cleaning device, FIGS. 7 and 8 are enlarged sectional views showing jet patterns, FIG. 9 is a control circuit diagram, and FIG. FIG. 10 is a characteristic diagram showing the relationship between the pump rotation speed and the fluid oscillation element supply pressure frequency. 1...Cleaning nozzle, 2...Fluid oscillation element, 3...
...Movable nozzle, 5...Fixed nozzle, 27...Washing water supply means/washing pump, 33... Supply control device.

Claims (1)

[Scope of Claims] 1. A cleaning nozzle is composed of a fluid oscillation element, a cleaning water supply means, and a cleaning water supply control device, and the supply control device controls the supply pressure and flow rate to the fluid oscillation element in multiple stages. A cleaning injection device in which the frequency band of the jet flow of the fluid oscillation element is divided into multiple stages and controlled. 2. The cleaning water supply means consists of a motor-driven pump, and the supply control device controls the rotation speed in two stages, with the first stage in the low and medium frequency oscillation bands, and the second stage in the low and medium frequency oscillation bands.
The cleaning injection device according to claim 1, wherein the stage is configured to set the supply pressure to a high frequency oscillation band.