JP2002188202A - Method and device for washing human-body private part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a method and a device for washing the private parts, by which collision pressure (load) to the private parts is increased by a small amount of water and a feeling of a stimulus and washing force can be improved. SOLUTION: In the method for washing the private parts, the private parts of a human body is washed in the droplet-flow region of a jet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and apparatus for cleaning a human body part.

[0002]

2. Description of the Related Art A conventional human body local cleaning apparatus has a nozzle 1 as shown in FIG. 14, and the cleaning water supplied to the nozzle 1 is jetted from a jet port 5 to a local part of the human body in a defecation posture. It is configured to be. By using such a human body local cleaning device before defecation, an effect of promoting defecation can be obtained, and by using it after defecation, a local cleaning effect can be obtained. In addition, by heating the jetted washing water to make it warm, the washing water can be used comfortably even in the cold winter season.

[0003]

Although the conventional human body cleaning device can obtain the above-mentioned effects, it is necessary to increase the impact pressure (load) on the human body, and to improve the irritability and cleaning power. It is necessary to increase the injection flow rate of water, so that not only can cleaning water not be saved, but also energy saving when heating the cleaning water to make it hot water cannot be achieved.

The present invention has been made to solve such a conventional problem, and a specific object of the present invention is to increase the impact pressure (load) on a local part of a human body with a small amount of water, and to increase irritability and detergency. It is an object of the present invention to propose a human body part cleaning method and a human body part cleaning device that can be improved.

[0005]

According to a first aspect of the present invention, there is provided a method for cleaning a local part of a human body, wherein the local part of the human body is cleaned at a portion where a jet is in a droplet flow region. And

[0006] In order to achieve the above object, a second aspect is provided.
Is characterized in that a local part of a human body is cleaned at an inflection portion where a jet changes from a continuous flow region to a droplet flow region.

In general, when a water jet is jetted into the air from a nozzle to which a water pressure of about 0.2 MPa is applied, first, as shown in FIG. 1, a continuous jet having a jet nucleus area which is a transparent portion that does not contain air is provided. A flow region exists. However, when the gas-liquid interface in this area reaches a certain distance, a wave occurs,
The amplitude increases as the distance from the nozzle outlet increases, and eventually the water flow breaks up and transitions to a droplet flow region where the flow becomes a mixed flow of water droplets and air. Finally, the mixed flow transitions to a diffusion flow region where the mixed flow is diffused.

On the other hand, when the impact pressure with respect to the distance from the nozzle outlet is measured, as shown in FIG. 1, a first peak occurs in the jet nucleus region, and a second inflection portion changes from the continuous flow region to the droplet flow region. There is a peak (where the horizontal axis is the distance from the nozzle outlet and the vertical axis is the impact pressure). Based on these facts, according to the human body part cleaning method of the present invention, when cleaning the human body part, a small amount of liquid droplet flow area or an inflection portion that changes from a continuous flow area to a liquid droplet flow area is used. It is possible to increase the collision pressure (load) against the human body part with water, and to improve the feeling of irritation and detergency.

[0009] Further, since the inflection portion that changes from the droplet flow region or the continuous flow region to the droplet flow region exists at a relatively distant position from the nozzle, compared to the case of washing in the continuous flow region, it is more likely to occur in the human body. The scattered splash water is less likely to splash on the nozzle, and the nozzle is also clean.

A third aspect of the present invention is the method for cleaning a local part of a human body according to the first or second aspect, wherein the local part of the human body is cleaned by changing the direction of the jet flow.

According to the third aspect of the present invention, the position at which the washing water collides with the local part is changed by changing the direction of the jet flow, so that the user's local part can be cleaned widely. . Here, as a method of changing the direction of the jet flow, for example, a method of moving a nozzle for jetting cleaning water forward and backward can be mentioned.

According to a fourth aspect of the present invention, there is provided the method for cleaning a local part of a human body according to the third aspect, wherein the local part of the human body is cleaned by changing the direction instantaneously.

[0013] According to the method for locally cleaning the human body according to the fourth aspect, by instantaneously changing the direction of the jet, the position at which the cleaning water collides with the local area changes, and the user's local area is instantaneously and widely cleaned. It is possible to do. Further, by changing the repetition direction, a different feeling of washing can be instantly enjoyed, and a monotonous feeling can be eliminated. Here, “instantaneous” means a time sufficiently smaller than the time required for local cleaning, and a specific moving speed of the cleaning water collision position is about 60 × 10 ⁻³ m / sec. If the collision position of the washing water is changed to this extent, the user can wash the local area extensively without feeling stress.

A fifth aspect of the present invention is the method for cleaning a local part of a human body according to the first or second aspect, wherein the local part of the human body is cleaned by changing the amount of water of the jet.

According to the fifth aspect of the present invention, by changing the amount of water in the jet, a different feeling of cleaning can be enjoyed and a monotonous feeling can be eliminated.
Also, a desired amount of water can be selected according to the physical condition. Here, as a method of changing the amount of washing water,
For example, this can be achieved by increasing or decreasing the effective area of the flow path for supplying the cleaning water to the nozzle.

A sixth aspect of the present invention is the method for cleaning a local part of a human body according to the fifth aspect, wherein the local part of the human body is cleaned by instantaneously changing the amount of water.

According to the method for cleaning a local part of a human body according to the sixth aspect, by changing the amount of water instantaneously, a different feeling of cleaning can be instantaneously felt, and a monotonous feeling can be eliminated. By repeatedly changing the amount of water, a so-called massage effect can be enjoyed. Here, “instantaneous” means a time sufficiently smaller than the time required for the local cleaning, and a specific change amount of the cleaning water is about 2.0 L / sec. If the amount of water is changed to this extent, the user can feel the change in the washing feeling.

A method for cleaning a human body part according to any one of claims 1 to 2, wherein the local part of the human body is cleaned by changing the temperature of the jet.

According to the seventh aspect of the present invention, a different feeling of washing can be obtained by changing the temperature of the jet. Also, a desired temperature can be selected according to the physical condition. Here, the method of changing the temperature of the jet can be achieved, for example, by increasing or decreasing the amount of thermal energy given to the flowing washing water (that is, the amount of power to the heat exchanger).

An eighth aspect of the present invention is the method for cleaning a local part of a human body according to the seventh aspect, wherein the local part of the human body is cleaned by instantaneously changing the temperature.

According to the eighth aspect of the present invention, by instantly changing the temperature of the jet, a different feeling of cleaning can be instantly enjoyed. Here, “instantaneous” means a time that is sufficiently smaller than the time required for local cleaning, and a specific temperature change is about 2.0 ° C./sec. If the temperature is changed at this level, the user can feel the change in the washing feeling.

A ninth aspect of the present invention is the method for cleaning a local part of a human body according to any one of the first to eighth aspects, wherein air is mixed in the jet to clean a local part of the human body.

According to the ninth aspect of the present invention, by mixing air into the jet stream, a sufficient washing feeling can be obtained even when the amount of washing water is small.

According to a tenth aspect of the present invention, there is provided the local body cleaning method according to the ninth aspect, wherein the local portion of the human body is cleaned by changing the amount of the air mixed.

According to the tenth aspect of the present invention, a different feeling of washing can be enjoyed and the monotonous feeling can be eliminated by changing the amount of air to be mixed.

An eleventh aspect of the present invention is the method for cleaning a local part of a human body according to the ninth or tenth aspect, wherein the local part of the human body is cleaned by instantaneously changing the amount of the air mixed.

In general, in the case of an unsteady jet in which a temporal change is added to a steady jet, the distance from the continuous flow region to the droplet flow region is shorter than that of the steady jet. According to the human body local cleaning method according to the eleventh aspect, by temporally changing the mixed amount of air, temporal fluctuation is added, the cleaning water is injected as an unsteady flow, and the liquid is discharged from the continuous flow region. It is possible to reduce the distance to the drop flow area. Therefore, even when cleaning a local part of the human body, it is possible not only to easily hit the local part, but also to reduce the scattering range of the cleaning water hitting the local part. Here, momentary
This means that the amount of air mixed into the washing water is changed from 0.4 L / min to 1.5 L / min at a cycle of 50 HZ, which means a time shorter than the time that can be sensed by the human body.

According to a twelfth aspect of the present invention, there is provided a human body local cleaning apparatus provided with a nozzle for discharging a jet flow according to the first to eleventh aspects of the present invention.

According to the twelfth aspect of the present invention, the user has a defecation posture by attaching the human body local rinsing apparatus having a nozzle for discharging a jet stream according to any of the first to eleventh aspects to a toilet bowl. As it is, the local area can be washed without closing both hands.

[0030]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is a schematic perspective view of a human body local cleaning nozzle showing an embodiment of the present invention. FIG. 3 is a sectional view of a tip of the human body local cleaning nozzle, and 8 is a water supply to which cleaning water is supplied. A passage 10 is a pressure chamber for injecting washing water from an orifice portion 12 (described later), 12 is an orifice portion for increasing the flow rate of washing water, 13 is an air suction portion for sucking air, and 15 is a throat portion. ,.

Here, the diameter of the orifice portion 12 is set to φ1.3.
mm, and the diameter of the throat portion 15 is φ2.3 mm (that is,
The cross-sectional area S1 of the outlet of the orifice portion 12 and the throat portion 15
(The area ratio S2 / S1 with respect to the cross-sectional area S2 is about 3.1).

The throat section 15 is provided with the orifice section 1.
It is arranged on trajectories X and Y from 2 to an anus a or a video b. In the embodiment shown in FIG. 2, the orifice portion 12 and the throat portion 15 are arranged on the same axis.

FIGS. 4 (a) and 4 (b) are explanatory views for explaining the arrangement of the water supply channel 8 and the water supply chamber 10, as viewed from the direction of the anus a or the bidet b in FIG. . 4A, the water supply channel 8 is connected toward the center of the water supply chamber 10, and therefore, the washing water supplied from the water supply channel 8 causes the orifice portion 12 to move along the trajectory X or Y.
Head for.

On the other hand, FIG. 4B shows that the water supply passage 8 is
0 (ie, the water supply channel 8 and the water supply chamber 10 constitute a cleaning water swirling section), the cleaning water supplied from the water supply channel 8 moves with respect to the trajectory X or Y. Turns toward the orifice section 12. The swirled washing water passes through the orifice section 12 and the throat section 15,
It is sprayed in a conical manner. Therefore, the area of the washing water colliding with the local part increases, and the human body can enjoy a more pleasing washing.

FIG. 5 shows a digital push-pull gauge (manufactured by Aiko Engineering Co., Ltd.) in which the embodiment shown in FIG. 4 (a) is prototyped, the cleaning water is spouted, and the spouted cleaning water is arranged at a distance of 60 mm from the prototype. ) Is data measured for about 2 seconds at a sampling cycle of 500 Hz, the horizontal axis represents time (seconds), and the vertical axis represents load (mN).

As shown in FIG. 5, it was confirmed that a peak load of 500 mN or more was generated when the fuel was injected from the prototype nozzle. It was also confirmed that a peak was generated at a period of about ten and several Hz.

FIG. 6 shows an area ratio S2 / S1 of the sectional area S1 of the orifice section 12 and the sectional area S2 of the throat section 15, and
It shows the relationship with the peak load when the jetted washing water hits a local area. Here, the area ratio S2 / S1 =
A peak load of about 3.1 and 500 mN or more has been experimentally confirmed.

Next, the operation and effect of this embodiment with the above configuration will be described. When a water pressure is applied upstream of the orifice portion 12, the washing water (flow velocity of about 12 m / s) injected from the outlet of the orifice portion 12 collides with the human body local part with the injected water pressure without any obstacle. That is, there is no energy loss (ie, no deceleration of the washing water).

When the washing water is injected from the outlet of the orifice section 12, the surrounding area of the orifice section 12 becomes negative pressure, so that air is sucked in (the so-called ejector effect). The air sucked by this ejector effect is
The surface of the washing water sprayed from the outlet of the orifice section 12 is disturbed (that is, time-varying), and the throat section 1
The cleaning water jetted from 5 is made thinner or thicker depending on the degree of turbulence. The repetition of this thin wash water,
This causes high-speed and low-speed repetition of the washing water jetted from the throat portion, and the repetition of the difference in speed appears as repetition of the density of the washing water jet.

The washing water that repeats the above-mentioned dense / dense is injected as an unsteady flow, and the distance from the continuous flow region to the droplet flow region is shorter than that of the steady jet (ie, the jet by the conventional nozzle). The collision pressure (load) on the human body part is increased with a small amount of water because it collides with the human body part at the inflection part that changes from the continuous flow area to the droplet flow area or the part that transitions to the droplet flow area. , Irritation and detergency can be improved. Also, when cleaning a local part of the human body, not only is it easy to hit the local part, but also the scattering range of the washing water that hits the local part can be reduced.

When the diameter of the orifice section 12 is D and the distance from the orifice section 12 to the anus a is L, D / L
= 0.04 to 0.1, preferably D / L = 0.03 to
It is desirable to design the local human body cleaning device to form a droplet flow area within the range of 0.09.

FIG. 7 shows a water circuit of a human body part cleaning apparatus provided with the human body part cleaning nozzle of FIG. From the water source side (upstream side), 20 is a water supply connection portion, 22 is a check valve for preventing backflow, 24 is a strainer for removing foreign matter in the supplied washing water, and 26 is a downstream line regardless of fluctuations in the water supply pressure. Pressure regulating valve for maintaining a constant pressure, 30 is a main flow path solenoid valve, 32
Is a body cleaning solenoid valve, 34 is a relief valve for suppressing a rise in downstream pressure when the pressure rises, 36 is a heat exchanger for instantaneously heating the supplied washing water, 38 is a vacuum break valve, and 40 is a flow breaker. A regulating valve (throttle valve), 42 is a switching valve, and 44 is a telescopic nozzle body provided with a human body local cleaning nozzle of FIG. 2 (one of each of the embodiments shown in FIGS. 4 (a) and 4 (b) at the tip) 4 (a) is used for cleaning the anus, and FIG. 4 (b) is used for cleaning the bidet). Reference numeral 46 denotes a nozzle expansion / contraction drive motor.

Here, by changing the amount of electric power supplied to the heat exchanger 36 and instantaneously changing the temperature of the washing water injected from the nozzle body 44, a different feeling of washing can be instantly felt. The term “instantaneous” means a time that is sufficiently shorter than the time required for the local cleaning, and the specific temperature change is about 2.0 ° C./sec. If the temperature is changed at this level, the user can feel the change in the washing feeling. Also, for example, 35 ° C. → 40 ° C. → 35 ° C.
By repeating the above cycle at a cycle of 5 seconds and changing the temperature of the jet, a different feeling of washing can be enjoyed.
Note that the cycle for changing the jet temperature is not limited to 5 seconds and may be 8 cycles.
The time may be as slow as 10 seconds or 10 seconds, or the interval may be set by the user.

A flow regulating valve (throttle valve) 40 and a switching valve 42
Is a separate block for explanation,
The flow control switching valves 40 and 42 may be integrally formed in the following description. In this case, the flow control switching valves 40 and 42 have 3
The valve has two outflow passages, and the built-in valve has a configuration in which the communication area between the inflow passage and the outflow passage can be selectively changed and water can be stopped by the rotation angle. The valve is rotatable by the driving force of the stepping motor.

Here, by changing the communication area between the inflow path and the outflow path, and instantaneously changing the amount of the washing water injected from the nozzle body 44, a different feeling of washing can be instantaneously felt, and thus it is monotonous. Feeling can be eliminated. By repeatedly changing the amount of water, a so-called massage effect can be enjoyed. The term “instantaneous” means a time sufficiently smaller than the time required for the local cleaning, and a specific change amount of the cleaning water is about 2.0 L / sec. If the amount of water is changed to this extent, the user can feel the change in the washing feeling. Further, the amount of the washing water is changed, for example, from 350 mL / min → 900 mL / min → 35
By repeatedly changing the 0 mL / min cycle at a 0.5 second cycle, a different feeling of washing can be enjoyed, and a monotonous feeling can be eliminated. The cycle of changing the amount of water is not limited to 0.5 seconds, but may be as slow as 1 second or 2 seconds, or may be configured so that the user can set the interval between them.

FIG. 8 is an explanatory diagram for explaining the expansion and contraction state of the nozzle body 44. In FIG. 8, the nozzle body 44 in the housed state is shown by a solid line, and the nozzle body 44 in the extended state is shown by a broken line. Further, a and b are washing positions of an anus and a bidet which are local parts of a human body, respectively, and A and B are extending positions of a nozzle body for spraying washing water to the anus a and a bidet b, respectively. , Y indicate trajectories connecting the orifice portion with the anus a and the bidet b, respectively.

In FIG. 8, as indicated by arrows,
By reciprocating the nozzle body 44 with a small stroke (about 25 mm) at the extension positions A and B, the cleaning range of the local area can be expanded, and at the same time, the washing water colliding with the local area due to the change in the direction of the jet flow. By changing the position, the user can enjoy a stimulating washing.

The cycle of the reciprocating movement of the nozzle body 44 in a minute stroke can be arbitrarily set or changed. The cleaning water to be sprayed is subjected to natural fluctuations in which the orifice portion and the throat portion repeat repetition of the density. , Nozzle body 44
Is disturbed by forced fluctuations due to the reciprocating movement of. Therefore, the human body can enjoy a more irritating wash. In addition, by changing the position of reaching the local part of the human body, it is possible to clean the local part over a wide range.

Furthermore, by instantaneously changing the direction of the jet flow and instantaneously changing the arrival position, it is possible to instantaneously clean the local area over a wide range. Also, by changing the repetition position,
A different feeling of washing can be instantly felt, and a monotonous feeling can be eliminated. Here, “instantaneous” means a time sufficiently smaller than the time required for local cleaning, and a specific moving speed of the cleaning water collision position is about 60 × 10 ⁻³ m / sec. If the collision position of the washing water is changed to this extent, the user can wash the local area extensively without feeling stress.

With reference to the timing chart shown in FIG. 8, the operation of the parts constituting the water circuit of the human body local cleaning apparatus until the cleaning water is injected to the human body in the above configuration will be described.

First, in the standby state, the seating switch (seating switch), the deodorizing / washing SW (washing switch), the main passage solenoid valve 30 and the body washing solenoid valve 32 are in the OFF state (non-operating state), and the nozzle body 44 is in the OFF state. Indicates the storage state, flow control switching valve 4
Numerals 0 and 42 are located at positions (= SC) where the inflow path and the three outflow paths are all communicated.

In the standby state, when the human body sits on the toilet seat (not shown), the seating SW (seating switch) is turned on, and the interlock of the human body local cleaning function is released and at the same time the deodorizing function (not shown) is activated. It is in the ON state (operating state).

Next, when the buttocks switch (not shown) is operated as a request to inject the washing water to the anus, the main flow path solenoid valve 30 is turned on (water channel open state), and the nozzle body 44 in the housed state is turned on. The washing water is sprayed from. The jetted cleaning water is reflected by the reflection plate 45 disposed on the opposite side to clean the nozzle body 44 (= pre-cleaning). After the pre-cleaning, the pressure trapped in the heat exchanger 38 is released (= pressure release). After depressurization, the flow control switching valves 40 and 42 move to the water stop position (= flow control movement). After the flow adjustment movement, the nozzle body 44
At this time, the body cleaning solenoid valve 32 is turned on (water channel open state) to clean the surface of the nozzle body 44 that is being extended (= extension (body washing)).

After the extension (body washing), the main flow path solenoid valve 30 is turned on and the opening of the water channel by the flow control switching valves 40 and 42 is gradually advanced in order to actually clean the local part of the human body (=).
Soft start). After the soft start, perform local cleaning using the body's favorite water force (= main cleaning).

When a stop switch (not shown) as a request to stop the washing water is operated, the main flow path solenoid valve 30 is turned off.
A state (water channel closed state) is reached, and the injection of the washing water is stopped. At this time, the nozzle body 44 and the flow control switching valves 40 and 42 are kept as they are, and the pressure trapped in the heat exchanger 36 is released. (= Pressure relief). After depressurization, flow control switching valve 4
0 and 42 are moved to the water stop position (= flow control movement). After the flow adjustment movement is completed, the nozzle body 44 is stored in the storage position, and at the same time, the body cleaning solenoid valve 32 is turned on, and the nozzle body 4 is turned on.
The surface of No. 4 is washed (= storage (body washing)).

After storage (body washing), the flow control switching valves 40, 4
2 is moved to the SC position, the main flow path solenoid valve 30 is turned on (water channel open state), and the nozzle body 4 is in the housed state.
Cleaning water is injected from 4. The jetted washing water is reflected by the reflecting plate 45 disposed on the opposite side to wash the nozzle body 44 (= post-washing).

After the post-washing, the flow control switching valves 40 and 42 are moved to the origin position (= origin adjustment).
0 and 42 are moved to the SC position (= flow control movement). Here, when the person leaves, the seating SW (seating switch) is turned off.
The state becomes F, and the deodorizing function stops.

FIG. 10 is provided with a variable section 18 for varying the amount of air taken in from the air inlet 13. The variable section 18 includes a motor, and opens and closes the air intake 13 at a high speed (about 50 Hz) by the motor, and variably controls the amount of air taken in from the air intake 13. Specifically, the amount of air mixed into the cleaning water is changed from 0.4 L / min to 1.5 L / min at a cycle of 50 HZ.

According to this embodiment, the opening / closing drive of the variable section 18 changes the amount of air taken in from the air intake 13. When the amount of air taken in varies, the degree of turbulence of the cleaning water increases, and a large difference in density occurs.

The washing water which repeats the above-mentioned dense / dense is jetted as an unsteady jet, and the distance from the continuous flow region to the droplet flow region is shorter than that of the steady jet (ie, the jet by the conventional nozzle). The collision pressure (load) on the human body part is increased with a small amount of water because it collides with the human body part at the inflection part that changes from the continuous flow area to the droplet flow area or the part that transitions to the droplet flow area. , Irritation and detergency can be improved. Also, when cleaning a local part of the human body, not only is it easy to hit the local part, but also the scattering range of the washing water that hits the local part can be reduced.

The variable period of the air amount by the variable section 18 can be set and changed arbitrarily, and the cleaning water to be injected is not limited to natural fluctuations at the orifice section and the throat section.
Disturbed by the forced fluctuation by the variable unit 18. Therefore, a small amount of water increases the collision pressure (load) on the local body,
It becomes possible to improve the feeling of irritation and detergency.

FIG. 11 shows an orifice rotating section 1 for rotating an orifice section 12 about a locus X or Y as a center axis.
9 is provided. This orifice rotating part 19
A motor is provided, and the nozzle head is rotated about the locus by the motor, and the outlet of the orifice portion 12 disposed on the locus is rotated about the locus as the central axis.

According to this embodiment, the orifice rotating unit 1
By means of 9, the orifice portion 12 is rotated around the locus X or Y as a central axis. When the orifice portion 12 rotates about the locus as the center axis, the washing water discharged from the orifice portion 12 is sprayed in a conical manner. Therefore, the area of the washing water colliding with the local part increases, and the human body can enjoy a more pleasing washing.

Further, by changing the direction of the jet flow and changing the position of reaching the local part of the human body, it is possible to clean the local part over a wide range. Further, by instantaneously changing the arrival position, it is possible to instantaneously clean a wide area. Further, by changing the repetition position, a different feeling of washing can be instantly enjoyed, and a monotonous feeling can be eliminated. Here, “instantaneous” means a time sufficiently smaller than the time required for local cleaning, and a specific moving speed of the cleaning water collision position is about 60 × 10 ⁻³ m / sec. If the collision position of the washing water is changed to this extent, the user can wash the local area extensively without feeling stress.

The rotation cycle of the orifice section 12 by the orifice rotating section 19 can be arbitrarily set or changed. 19 disturbed by forced fluctuations. Therefore, the human body can enjoy a more irritating wash.

FIG. 12 is provided with a washing water pressure varying section 48 for varying the pressure of the washing water supplied to the orifice section 12 at a predetermined cycle. This washing water pressure fluctuation unit 4
Reference numeral 8 includes a known plunger pump constituted by an electromagnetic coil and a plunger, and a high pressure is periodically applied to the washing water by driving the plunger pump.

According to this embodiment, the cleaning water pressure fluctuation unit 4
By virtue of 8, the pressure of the washing water supplied to the orifice portion 12 fluctuates in a predetermined cycle. Therefore, in addition to the natural fluctuation at the orifice and throat,
It is disturbed by the forced fluctuation by the cleaning water pressure fluctuation part 48. The washing water that repeats such a sparse / dense cycle is jetted as pulsating washing water, and reduces the distance from the continuous flow region to the droplet flow region. The collision pressure (load) with a small amount of water is applied to the human body at a point of inflection that changes from the continuous flow region to the droplet flow region or at the portion that transitions to the droplet flow region. It is possible to increase the stimulating feeling and the detergency.

FIG. 13 particularly has a resonance chamber 60.

According to this embodiment, the resonance chamber 60 is provided, and when the washing water is injected from the outlet of the orifice section 12, the periphery of the orifice section 12 (that is, the resonance chamber 60).
Becomes negative pressure. When the pressure in the resonance chamber 60 becomes negative, the cleaning water sprayed from the throat portion 15 acts as a force for pulling the cleaning water toward the resonance chamber 60. As a result, the cleaning water spreads in a conical shape and is discharged.

When the negative pressure in the resonance chamber 60 increases, the atmosphere near the outlet of the throat portion 15 is drawn into the resonance chamber 60. When the atmosphere is drawn into the resonance chamber 60, the pressure in the resonance chamber becomes positive, and the cleaning water injected from the orifice portion 12 does not spread in a conical shape, but is discharged as a united thin linear jet.

By providing the resonance chamber 60 in this way, conical water discharge and linear water discharge are repeatedly performed (so-called self-oscillation phenomenon occurs). The washing water that repeats such oscillation is jetted as pulsating washing water, and reduces the distance from the continuous flow region to the droplet flow region.
The collision pressure (load) with a small amount of water is applied to the human body at a point of inflection that changes from the continuous flow region to the droplet flow region or at the portion that transitions to the droplet flow region. It is possible to increase the stimulating feeling and the detergency.

The embodiment of the present invention is not limited to the above, but can be modified as follows, for example.

(1) Although an example in which air is used as a method for making the jet unsteady has been described, the present invention is not limited to this, and an ultrasonic wave may be used. Even when ultrasonic waves are applied to the cleaning water, the jets are temporally fluctuated and become unsteady. For this reason, the distance from the continuous flow region to the droplet flow region is shorter than that of the steady jet, and the inflection portion that just changes from the continuous flow region to the droplet flow region or the portion that transitions to the droplet flow region As a result, the collision pressure (load) with respect to the human body part is increased with a small amount of water, and it is possible to improve the feeling of irritation and detergency. Also, when cleaning a local part of the human body, not only is it easy to hit the local part, but also the scattering range of the washing water that hits the local part can be reduced.

[Brief description of the drawings]

Fig. 1 Schematic diagram of aerial water jet

FIG. 2 shows a nozzle portion of a human body local cleaning apparatus according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of the tip of a nozzle portion of the human body local cleaning device.

4A is a diagram in which the water supply channel 8 is connected toward the center of the water supply chamber 10, and FIG. 4B is a diagram in which the water supply channel 8 is connected eccentrically from the center of the water supply room 10 (ie, FIG. 4A). , The water supply channel 8 and the water supply chamber 10 constitute a washing water swirling section)

FIG. 5 shows data obtained by actually producing the example shown in FIG. 3A and measuring the load when the cleaning water was discharged.

FIG. 6 shows the relationship between the area ratio S2 / S1 of the cross-sectional area S1 of the outlet of the orifice section and the cross-sectional area S2 of the throat section, and the peak load when the jetted washing water hits a local area.

FIG. 7 is a water circuit of a human body cleaning device having the human body cleaning nozzle of FIG. 2;

FIG. 8 is an explanatory diagram for explaining the expansion and contraction state of the nozzle body 44;

FIG. 9 is a timing chart showing the operation of the parts constituting the water circuit of the human body local cleaning apparatus.

FIG. 10 shows an embodiment of a nozzle of a variable air flow type.

FIG. 11 is an embodiment of a cleaning water swirl type nozzle.

FIG. 12 is a water circuit of a human body local cleaning device having a cleaning water pressure fluctuation unit.

FIG. 13 is an embodiment of a self-oscillation type nozzle.

FIG. 14 is a sectional view of a conventional human body local cleaning nozzle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... this nozzle, 2 ... 1st nozzle, 3 ... nozzle body, 4 ...
Cavity, 5 ... Injection port, 6 ... Injection port, 7 ... Air intake port, 8 ...
Water supply channel, 12: orifice section, 13: air suction section, 15
... Throat part, 18 ... variable part, 19 ... Orifice rotation part, 20 ... Water supply connection part, 22 ... Check valve, 24 ... Strainer, 26 ... Pressure regulating valve, 30 ... Main flow path solenoid valve, 32 ... Body washing solenoid valve, 34 ... relief valve, 36 ... heat exchanger, 38 ...
Vacuum release valve, 40: Flow control valve (throttle valve), 42: Switching valve,
44 ... nozzle body, 45 ... reflecting plate, 46 ... nozzle expansion / contraction drive motor, 48 ... wash water pressure fluctuation unit, 60 ... resonance chamber

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Ryosuke Hayashi 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka F-term (reference) 2D038 JA05 JB04 JH03 JH12

Claims (12)

[Claims] 1. A method for cleaning a local part of a human body, wherein the local part of the human body is cleaned at a portion where the jet flow is in a droplet flow region. 2. A method for cleaning a local part of a human body, comprising cleaning a local part of a human body at an inflection portion where a jet flow changes from a continuous flow region to a droplet flow region. 3. The method for cleaning a local part of a human body according to claim 1, wherein the local part of the human body is cleaned by changing a direction of the jet flow. 4. The method according to claim 3, wherein the direction is instantaneously changed to clean the local part of the human body. 5. The method for cleaning a local part of a human body according to claim 1, wherein the local part of the human body is cleaned by changing the amount of water of the jet. 6. The method according to claim 5, wherein the amount of water is instantaneously changed to clean a local part of a human body. 7. The method according to claim 1, further comprising cleaning the local part of the human body by changing a temperature of the jet. 8. The method according to claim 7, wherein the temperature is changed instantaneously to clean a local part of a human body. 9. The method of cleaning a local part of a human body according to claim 1, wherein air is mixed into the jet stream to clean a local part of the human body. 10. The human body local cleaning method according to claim 9, wherein the local part of the human body is cleaned by changing the amount of the air mixed therein. 11. The method for cleaning a local part of a human body according to claim 9, wherein the local part of the human body is cleaned by instantaneously changing the amount of the air mixed. 12. The apparatus according to claim 1, further comprising a nozzle capable of being attached to a toilet bowl, the nozzle being configured to discharge a jet stream.