JPH08239889A - Flushing method and flushing nozzle used for method - Google Patents

Abstract

PURPOSE: To improve efficiency of flushing by providing the first nozzle for producing water flow of C-section in a flushing nozzle for a stool type flush urinal, colliding the flushing water against a face to be flushed in such a state as hard to break its section, and reducing splash. CONSTITUTION: The first nozzle which produces the first flushing flow (A) of C section shape (a) and the second flushing nozzle which produces the second flushing flow (B) of flat section (b) are installed at the head part 10 of the nozzle 2 for flushing the internal wall face of a bowl part 4 of a water urinal 3. When flow rate to the flush water is reduced, a face to be flushed which is positioned in relatively far from the nozzle 2 is flushed by the first flow (A) whose flow sectional shape is heard to break and at the same time a part near the nozzle 2 or the internal wall face is flushed by the flat second flow (B). Even if the flushing water is increased, this constitution eliminates any splash of the flushing water. This flushing method can be also applied to flushing of a floor face, a wall face, etc., besides the urinal. The flushing can be performed efficiently thereby.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning method for cleaning a surface to be cleaned by causing a cleaning water flow rectified into a water curtain to collide with the surface to be cleaned in order to clean the inside of a urinal, for example. The present invention relates to a cleaning nozzle used in the method.

[0002]

2. Description of the Related Art In the cleaning method described above, a cleaning water flow whose flow direction is as thin as possible and whose movement direction is aligned as much as possible is made to collide with the surface to be cleaned, so that the cleaning water does not bounce off the surface to be cleaned. , There is an advantage that splashed cleaning water is less likely to splash to the outside of the urinal, but in the conventional cleaning method, the cleaning water flow rectified into a flat water curtain is collided with the surface to be cleaned ( See, for example, Japanese Patent Laid-Open No. 6-49872).

[0003]

Therefore, when trying to clean a narrow area in the width direction such as a portion where dirt easily remains on the surface to be cleaned, the cleaning water flow is rectified into a narrow water curtain shape. Since it is necessary to collide with the surface to be cleaned, there is a drawback that the amount of cleaning water decreases due to the narrowed width and effective cleaning cannot be performed, and if the flow rate is increased to secure a desired amount of cleaning water, Since the kinetic energy of water increases, the water curtain-shaped shape of the cleaning water flow breaks before reaching the surface to be cleaned, and the cleaning water after colliding with the surface to be cleaned easily bounces. , There is a risk that the splashed cleaning water may be scattered outside the urinal.

The present invention has been made in view of the above circumstances, and by devising the shape of the water curtain of the cleaning water to be collided with the surface to be cleaned, a narrow range in the width direction of the surface to be cleaned can be provided. An object of the present invention is to provide a cleaning method capable of effectively cleaning the cleaning water in a state in which the cleaning water does not bounce off the surface to be cleaned, and a cleaning nozzle used in the method.

[0005]

A first characteristic configuration of a cleaning method according to the present invention for achieving the above object is to make a cleaning water flow rectified into a water curtain collide with a surface to be cleaned, and to clean the surface to be cleaned. This is a cleaning method for cleaning, in which the first cleaning water flow rectified into a water curtain shape having a curved cross-section that intersects the flow direction collides with the surface to be cleaned.

The second characteristic configuration of the cleaning method is the same as the first characteristic configuration of the cleaning method, except that the first cleaning water flow is rectified into a water curtain having a C-shaped cross-section that intersects the flow direction. The point is to collide with the surface to be cleaned.

The first characteristic configuration of the cleaning nozzle used in the cleaning method is to discharge the cleaning water supplied to the supply channel and the cleaning channel supplied to the supply channel so as to collide with the surface to be cleaned. A first water-vapour-like cleaning in which the first water discharge passage communicates with the flow passage wall of the first water discharge passage, and the cross-sectional shape of the wash water to be discharged intersects the flow direction is curved. A first rectifying surface that rectifies the water flow is formed, and the first rectifying surface is formed in a shape that curves along the circumferential direction of the first water discharge channel.

A second characteristic configuration of the cleaning nozzle is the same as the first characteristic configuration of the cleaning nozzle, wherein the first straightening surface is
The point is that the wash water discharged is formed so as to be rectified into a water curtain-shaped first wash water flow having a C-shaped cross section that intersects the flow direction.

A third characteristic structure of the cleaning nozzle is the cleaning nozzle according to the first or second characteristic structure, in which the flow passage cross-sectional area of the first water discharge flow passage is set to be wider toward the downstream side. There is a point.

According to a fourth characteristic configuration of the cleaning nozzle, in the first, second or third characteristic configuration of the cleaning nozzle, the supply flow passage is formed in a tubular shape, and the first water discharge flow passage is used for the supply. The point is that it communicates with the flow path in the radial direction.

A fifth characteristic structure of the cleaning nozzle is the same as the third characteristic structure of the cleaning nozzle, in which a flow path end surface for closing the downstream side of the supply flow path is formed, and the first rectifying surface is the flow path end surface. The point is that they are connected to each other.

According to a sixth characteristic configuration of the cleaning nozzle, the cleaning water supplied to the supply passage is the surface to be cleaned in the first, second, third, fourth or fifth characteristic configuration of the cleaning nozzle. A second water discharge channel for discharging water to collide with the supply channel is connected to the supply channel, and the flow water of the second water discharge channel causes the wash water to be discharged into a flat water curtain-shaped second wash water flow. A second straightening surface that straightens is formed, and the first water discharge flow channel causes the first cleaning water flow to collide with a surface to be cleaned downstream of a position where the second cleaning water flow collides with the surface to be cleaned. It is located in the state.

[0013]

The operation according to the first characteristic constitution of the cleaning method is as follows. The cleaning water flow rectified in the form of a water curtain is made to collide with the surface to be cleaned, and the surface to be cleaned is cleaned with a small amount of splashing of the cleaning water from the surface to be cleaned.
Since the first cleaning water flow having a water curtain shape having a curved cross section intersecting the flow direction is rectified and collided with the surface to be cleaned, a narrow water curtain shape cleaning water flow of the surface to be cleaned is narrowed. The amount of washing water can be secured more easily than when colliding with a narrow range in the width direction.

The operation of the second characteristic configuration of the cleaning method is as follows. Even if the amount of washing water is increased or decreased, the width of the water curtain along the C-shaped cross section changes depending on the amount of washing water.
It is easy to cause the first cleaning water flow, which maintains the shape of a water curtain having a curved cross section, to collide with the surface to be cleaned.

The operation of the first characteristic structure of the cleaning nozzle is as follows. The cleaning water supplied to the supply channel flows into the first water discharge channel, and has a water curtain shape in which the first rectifying surface formed on the channel wall has a curved cross-section that intersects the flow direction. It is possible to clean the surface to be cleaned by colliding the first cleaning water flow, which is rectified into the first cleaning water flow and has a curved water curtain shape, in a narrow range in the width direction of the surface to be cleaned.

The operation of the second characteristic configuration of the cleaning nozzle is as follows. Even if the amount of cleaning water is increased or decreased, the width of the water curtain along the C-shaped cross-section changes in length depending on the amount of cleaning water, and the water curtain-like shape in which the cross-sectional shape is curved is maintained.
It is easy to make the washing water flow collide with the surface to be washed.

The operation of the third characteristic configuration of the cleaning nozzle is as follows. Since the flow passage cross-sectional area of the first water discharge flow passage is set to be wider toward the downstream side, the static pressure in the supply flow passage is unlikely to rise, and the cleaning flows into the first water discharge flow passage from the supply flow passage. A curved water curtain-shaped first that keeps the flow velocity of water low.
It is easy to cause the cleaning water flow to collide with the surface to be cleaned with its cross-sectional shape not easily broken.

The operation of the fourth characteristic configuration of the cleaning nozzle is as follows. Since the direction in which the wash water flows along the supply flow path and the direction in which the wash water flows into the first discharge flow path intersect, the kinetic energy of the wash water changes when the flow direction of the wash water changes. The flow rate of the wash water is reduced and the flow rate of the wash water flowing into the first water discharge passage is suppressed, and the curved water curtain-shaped first wash water flow is easily collided with the surface to be washed in a state where its cross-sectional shape is not easily broken.

The operation of the fifth characteristic configuration of the cleaning nozzle is as follows. Since the first rectifying surface is arranged so as to be connected to the flow path end surface that closes the downstream side of the supply flow path, the flow direction is changed in the radial direction of the supply flow path due to the collision with the flow path end surface, and the kinetic energy is changed. The reduced wash water easily flows into the first water discharge passage that is in radial communication with the supply passage, and the wash water whose flow direction has been changed to the radial direction of the supply passage in advance is Efficiently rectified along one rectifying surface.

The operation of the sixth characteristic configuration of the cleaning nozzle is as follows. The cleaning water supplied to the supply channel is the first
In addition to the water discharge flow passage, the cleaning water that has flown into the second water discharge flow passage and flows into the second water discharge flow passage has a flat water curtain-shaped second cleaning formed by the second rectifying surface formed on the flow passage wall. It is possible to wash a wide range in the width direction by colliding the second washing water stream that is rectified into the water stream and rectified into a flat water curtain shape with the first surface.
Since the first water discharge flow path is arranged in a state in which the cleaning water flow collides with the surface to be cleaned downstream of the position where the second cleaning water flow collides with the surface to be cleaned, the cleaning range is wide but the unit cleaning area is large. It is difficult to sufficiently clean with the second cleaning water flow having a small amount of cleaning water per hit, and therefore, even in the surface to be cleaned, a narrow range in the width direction in which dirt easily remains can be effectively cleaned with the first cleaning water flow.

[0021]

According to the first characteristic configuration of the cleaning method, it is easy to secure the amount of cleaning water while colliding the water curtain-shaped first cleaning water flow in a narrow range in the width direction of the surface to be cleaned. It is possible to effectively clean a narrow area of the cleaning surface in the width direction in a state where the cleaning water does not easily bounce off the surface to be cleaned.

According to the second characteristic configuration of the cleaning method, in addition to the effect of the first characteristic configuration of the cleaning method, even if the amount of cleaning water is increased / decreased, the water curtain-like shape having a curved cross section is maintained. Compared to the case of colliding a cleaning water flow rectified into a water curtain shape with a series of cylindrical cross-sectional shapes where the water curtain shape is likely to collapse when the amount of cleaning water is reduced because the first cleaning water flow easily collides with the surface to be cleaned. Therefore, it is easy to adjust the amount of washing water.

According to the first characteristic structure of the cleaning nozzle, the first cleaning water flow having a water curtain shape having a curved cross-section intersecting the flow direction can be collided with the surface to be cleaned, so that the cleaning can be performed. Even though the first cleaning water flow collides with a narrow range in the width direction of the surface to be cleaned, it is easy to secure the amount of the cleaning water, and the cleaning water does not bounce off the surface to be cleaned in a narrow range in the width direction of the surface to be cleaned. Can be effectively washed in the state.

According to the second characteristic structure of the cleaning nozzle, in addition to the effect of the first characteristic structure of the cleaning nozzle, even if the amount of cleaning water is increased or decreased, a water curtain-like shape having a curved cross section is formed. When the maintained first cleaning water flow easily collides with the surface to be cleaned, the cleaning water flow is rectified into a water curtain shape having a series of cylindrical cross-sectional shapes in which the water curtain shape easily collapses when the amount of cleaning water is reduced. Compared to, it is easier to adjust the amount of washing water.

According to the third characteristic configuration of the cleaning nozzle, in addition to the effect of the first or second characteristic configuration of the cleaning nozzle, the static pressure in the supply passage is unlikely to rise, and the cleaning nozzle has a curved water curtain shape. Since it is easy to cause the first cleaning water flow to collide with the surface to be cleaned in a state where its cross-sectional shape is not easily broken, it is easier to secure the amount of cleaning water.

According to the fourth characteristic structure of the cleaning nozzle, in addition to the effect of the first, second or third characteristic structure of the cleaning nozzle, its kinetic energy is changed when the flow direction of the cleaning water is changed. Since the reduced and curved water curtain-shaped first cleaning water flow easily collides with the surface to be cleaned in a state in which the cross-sectional shape is not easily broken, the amount of cleaning water can be more easily secured.

According to the fifth characteristic configuration of the cleaning nozzle, in addition to the effect of the fourth characteristic configuration of the cleaning nozzle, the cleaning water with reduced kinetic energy easily flows into the first water discharge passage, and Since it is efficiently rectified along the first rectifying surface, it is easy to cause the curved water curtain-shaped first cleaning water flow to collide with the surface to be cleaned in a state in which its cross-sectional shape is less likely to be broken.

According to the sixth characteristic construction of the cleaning nozzle, in addition to the effect of the first, second, third, fourth or fifth characteristic construction of the cleaning nozzle, a flat area capable of cleaning a wide range in the width direction is obtained. It is possible to effectively clean a cleaning surface in a narrow region in the width direction, which is difficult to be sufficiently cleaned with the simple water curtain-shaped second cleaning water flow, by the curved water curtain-shaped first cleaning water flow.

[0029]

【Example】

[First Embodiment] FIGS. 1 and 2 are used for a cleaning method for cleaning the surface 1 to be cleaned by colliding the cleaning water streams A and B rectified in the form of a water curtain with the surface 1 to be cleaned, and to use the method. Cleaning nozzle 2
A resin or metal cleaning nozzle 2 for cleaning the inner wall surface 1 of the bowl 4 as the surface to be cleaned is provided at the upper position of the bowl 4 of the ceramic stall-type flush urinal 3. .

The inner wall surface 1 of the bowl portion 4 has a bottom wall surface 5 formed in a bowl shape, and a side wall surface 6 extending upward from the upper portion of the bottom wall surface 5 so as to be curved inward. Bottom wall surface 5
Side wall surface 6 side and a pair of left and right bulging surfaces 7 that partially bulge along the vertical direction, and the cleaning nozzle 2 is removably mounted at the upper center position of the side wall surface 6. .

As shown in FIGS. 3 to 5, the cleaning nozzle 2 has a connecting pipe portion 9 in which a supply flow path 8 for supplying cleaning water is formed, and two first cleaning water discharging nozzles. The nozzle head 10 is formed so that the water discharge passage 11 and the one second water discharge passage 12 are positioned in front of and behind each other, and the connecting pipe portion 9 is horizontally provided in front of and behind the bowl portion 4. The cleaning water supplied from the water supply pipe 13 to the supply flow path 8 is operated by a valve (not shown) connected to the water supply pipe 13 by penetrating and connecting the water supply pipe 13 to the penetrating end side thereof. Water is sprayed from each of the passage 11 and the second water discharge passage 12 so as to collide with the inner wall surface 1 of the bowl portion 4, and the inner wall surface 1 is washed while flowing down,
The water is drained from a drain port 14 provided at the bottom of the bowl 4.

In this embodiment, at the start of cleaning, 0.
The washing water is supplied to the supply passage 8 at a pressure of about 1 Kgf / cm ^2, and a total of 18 from the first discharge passage 11 and the second discharge passage 12.
After discharging water with a wash water amount of about 1 liter / min, and when a predetermined time has elapsed from the start of washing, the wash water is supplied to the supply passage 8 at a pressure of about 0.05 Kgf / cm ² , and the first discharge passage 11 and the second It is configured to discharge water from the water discharge passage 12 with a total wash water amount of about 11 liters / min.

The supply passage 8 is formed in a cylindrical shape having a diameter of about 15 mm while being inserted into the nozzle head 10.
The flow path end surface 15 that closes the downstream side is formed as a conical concave surface.

The two first water discharge passages 11 are separately communicated with the downstream end side of the supply passage 8 in the radial direction of the supply passage 8 and pass through the center line of the supply passage 8. When viewed from the direction of the core X, the phases are shifted from each other, and are arranged radially about the nozzle axis X and symmetrically with respect to the vertical centerline Y passing through the nozzle axis X.

Each of the flow channel walls of the first discharge channel 11 is
As shown in FIG. 7, front and rear two orthogonal flat surfaces 16a, 1 parallel to each other along a direction orthogonal to the nozzle axis X
6b and two half-divided circumferential surfaces 17 arranged so as to smoothly connect the edges of the orthogonal flat surfaces 16a and 16b in the circumferential direction of the supply flow path to each other. In this embodiment, the space between the orthogonal flat surfaces 16a and 16b is about 5.5 mm, and the radius of the half circumferential surface 17 is 2.
Each is set to about 8 mm.

One of the orthogonal flat surfaces 16a, 16b is formed in a state of being connected to the peripheral edge of the flow path end surface 15, and the orthogonal flat surface 16a and the two half circumferential surfaces 17 The first rectifying surface 18 having a shape that curves along the circumferential direction of the first water discharge passage 11 is formed, and the interval between the half circumferential surfaces 17 is made wider toward the downstream side of the passage,
The cross-sectional area of the channel is set to a larger area on the downstream side of the channel,
In this embodiment, the maximum distance between the half circumferential surfaces 17 is set to about 7.5 mm at the flow path inlet and 10.4 mm at the flow path outlet.

Then, from the supply channel 8 to the first water discharge channel 11
While flowing along the first straightening surface 18, the washing water that has flowed into the straightening water is straightened into a water curtain-shaped first washing water flow A in which a cross-sectional shape a intersecting the flow direction is curved in a C shape. First
The washing water flow A is, as shown in FIGS.
The first washing water flow A is discharged obliquely downward in a direction orthogonal to the above, and the discharged first washing water flow A is above the bulging surface 7 while maintaining the water curtain shape in which the cross-sectional shape a is curved in a C shape. After colliding with the side wall surface 6 at the position, as shown by the white arrow in the figure, the inner wall surface 19 in a narrow range mainly between the bulging surface 7 and the urinal edge is washed down while flowing down. FIG.
The cross-sectional shape a of the first washing water flow A shown in (1) indicates a schematic shape when the side wall surface 6 is collided.

The second water discharge passage 12 is connected to the bottom side of the supply flow passage 8 in the radial direction on the upstream side of the first water discharge passage 11 in the same manner as the first water discharge passage 11. It is formed in a fan shape that is bilaterally symmetrical with respect to a vertical centerline Y that passes through the nozzle axis X.

Two inclined flat planes 20 are arranged parallel to each other along the direction in which the flow path wall of the second water discharge flow path 12 is inclined toward the upstream side of the supply flow path with respect to the nozzle axis X toward the downstream side.
a, 20b and a peripheral side surface 21 arranged along the arcuate peripheral edges of the inclined flat surfaces 20a, 20b so as to be orthogonal to the inclined flat surfaces 20a, 20b. The inclined flat surface 20a disposed on the downstream side of the supply flow path is formed on the second straightening surface that straightens the discharged wash water into the flat water curtain-like wash water flow B. In the present embodiment, the inclined flat surface is formed. The distance between 20a and 20b is 3 mm
It is set to a degree.

Then, from the supply channel 8 to the second water discharge channel 12
While flowing along the second straightening surface 20a, the wash water that has flowed in is straightened to a water curtain-shaped second wash water stream B having a flat cross-section b crossing the flow direction.
Is discharged toward the rear side of the nozzle head 10, and the discharged second washing water flow B is located above the position where the first washing water flow A collides while maintaining its flat water curtain shape. After widely colliding with the inner wall surface 1, the inner wall surface 1 is washed while flowing down a wide range in the width direction.

In forming the flow channel wall of the second water discharge channel 12, the circumference is arranged along the arc-shaped peripheral edges of the inclined flat surfaces 20a, 20b so as to be orthogonal to the inclined flat surfaces 20a, 20b. Instead of the side surface 21, as shown in FIG. 8, a semicircular side surface 21 may be formed to smoothly connect the two inclined flat surfaces 20a and 20b. Further, as shown in FIG. Alternatively, the peripheral side surface 21 having a triangular groove shape in cross section may be formed to connect the two inclined flat surfaces 20a and 20b.

[Second Embodiment] In FIGS. 10 and 11, the cleaning water streams A and B rectified into a water curtain are made to collide with the surface to be cleaned 1,
Another example of the cleaning method for cleaning the surface to be cleaned 1 and the cleaning nozzle 2 used in the method is shown. The eaves portion 22 formed on the upper side of the ceramic stall type flush urinal 3 is used as a surface to be cleaned. A resin cleaning nozzle 2 for cleaning the inner wall surface 1 of the bowl portion 4 is provided.

As shown in FIGS. 12 to 14, the cleaning nozzle 2 includes a connecting pipe portion 9 in which a supply flow path 8 is supplied with cleaning water from above, and two cleaning pipes for discharging cleaning water. Nozzle head 10 in which a first water discharge passage 11 and one second water discharge passage 12 are formed so as to be positioned in front of and behind each other.
And the water supply pipe 13 is connected to the penetrating end side of the eaves portion 22 in the vertical direction.

The nozzle head 10 has an upper wall 23 provided on the lower end side of the connecting pipe portion 9, a side wall 24 having a U-shaped cross section and a J-shaped vertical cross section, and a side wall. 24
Of the front wall 26, which is substantially semicircular in front view and is arranged with a gap from the opening end surface 25 of the front wall 2 inside.
An inflow space 27 for washing water that becomes wider on the 6 side is formed, and the inner surface side of the curved wall 28 that smoothly connects the upper wall 23 and the front wall 26 is partially divided into left and right by a partition wall 29.

The two first water discharge passages 11 are formed on the side peripheral wall 2
4 has an oval shape having two front and rear flat surfaces 30a and 30b parallel to each other and two half-divided circumferential surfaces 31 that smoothly connect the flat surfaces 30a and 30b to each other in the vicinity of the open end surface 25 of FIG. The through holes are formed symmetrically, and the flat surface 30a of the two flat surfaces 30a and 30b on the side of the open end face 25 and the two half circumferential surfaces 31 form the circumference of the first water discharge passage 11. A first straightening surface 18 having a shape that curves along the direction is formed.

The wash water that has flowed into the first water discharge passage 11 flows along the first straightening surface 18, while the cross-sectional shape a intersecting the flow direction is gently curved toward the front wall 26. The first cleaning water flow A is rectified into a water curtain-shaped first cleaning water flow A, and the first cleaning water flow A is discharged obliquely downward along a substantially vertical plane as shown in FIGS. First
The washing water flow A maintains the water curtain shape in which the cross-sectional shape a is gently curved, and the side wall surface 6 located above the bulging surface 7.
After the collision, the inner wall surface 19 of the narrow range in the width direction between the bulging surface 7 and the urinal edge is washed down as shown by the white arrow in the figure. The first shown in FIG.
The cross-sectional shape a of the wash water flow A shows a schematic shape when it collides with the side wall surface 6.

The second water discharge passage 12 is formed between the open end surface 25 of the side peripheral wall 24 and the peripheral edge of the front wall 26, and the inner peripheral surface of the front wall 26 facing the open end surface 24 is tapered to the tapered surface 32.
The tapered surface 32 is formed as a second straightening surface that straightens the discharged wash water into a flat water curtain-like wash water flow B.

The wash water flowing into the second water discharge passage 12 flows along the second straightening surface 32 and has a water curtain-shaped second wash water flow having a flat cross-section b crossing the flow direction. It is rectified to B and this second washing water flow B is
Of the second washing water flow B, which has been discharged toward the inner wall surface 1 side of the pot portion 4 and has been discharged, and the first washing water flow A collides while maintaining its flat water curtain shape. After colliding broadly with the inner wall surface 1 above the position, the inner wall surface 1 is washed while flowing down a wide range in the width direction. In the present embodiment, a part of the wash water that is about to flow into the second water discharge passage 12 will flow into the first water discharge passage 11,
The wash water having a motion component toward the second water discharge passage 12 side flows into the first water discharge passage 11,
In particular, the cleaning water that has flowed into the first water discharge passage 11 along the half-circumferential circumferential surface 31 of the first straightening surface 18 is the second water discharge passage 1
Since it easily flows out from the first water discharge passage 11 while having a motion component toward the 2 side, the cross-sectional shape a intersecting the flow direction of the first wash water flow A is gently curved toward the front wall 26 side. It is thought that the water was rectified into a water curtain. Other configurations are the same as in the first embodiment.

Other Embodiments 1. The cleaning method according to the present invention may be applied to a method of cleaning a surface to be cleaned such as a floor surface or a wall surface other than the urinal. 2. The cleaning nozzle according to the present invention discharges a cleaning water flow rectified into a water curtain shape having a curved cross-section that intersects the flow direction in a direction parallel to the flow path axis of the supply flow path.
A discharge channel may be provided. 3. The cleaning nozzle according to the present invention may be provided with a single first water discharge passage. 4. The cross-sectional shape a that intersects the flow direction of the first cleaning water flow A rectified in a water curtain shape is S as shown in FIG.
The shape may be a W shape as shown in FIG. 16 or an O shape as shown in FIG.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry. Moreover, the wording of the 1st water discharge channel and the 2nd water discharge channel, and the wording of the 1st straightening surface and the 2nd straightening surface do not limit those numbers.

[Brief description of drawings]

FIG. 1 is a front view showing a cleaning method.

FIG. 2 is a vertical sectional view showing a cleaning method.

FIG. 3 is a partial cross-sectional side view of a cleaning nozzle.

FIG. 4 is a front view of a cleaning nozzle.

FIG. 5 is a bottom view of the cleaning nozzle.

6 is a view taken along the line VI-VI in FIG.

7 is a sectional view taken along the line VII-VII in FIG.

FIG. 8 is a sectional view of a main part

FIG. 9 is a sectional view of a main part

FIG. 10 is a front view showing the cleaning method of the second embodiment.

FIG. 11 is a vertical cross-sectional view showing the cleaning method of the second embodiment.

FIG. 12 is a partial cross-sectional side view of the cleaning nozzle according to the second embodiment.

FIG. 13 is a front view of the cleaning nozzle according to the second embodiment.

FIG. 14 is a bottom view of the cleaning nozzle according to the second embodiment.

FIG. 15 is a sectional view of a first washing water flow showing another embodiment.

FIG. 16 is a sectional view of a first washing water flow showing another embodiment.

FIG. 17 is a sectional view of a first washing water flow showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface to be cleaned 8 Supply flow path 11 First water discharge flow path 12 Second water discharge flow path 15 Flow path end surface 18 First straightening surface 20a Second straightening surface 32 Second straightening surface a Cross section A First washing water flow B Second Wash water flow

Claims (8)

[Claims] 1. A cleaning method for cleaning a surface to be cleaned (1) by colliding a cleaning water flow (A) rectified in the form of a water curtain with the surface to be cleaned (1), which crosses the flow direction. A cleaning method in which the first cleaning water flow (A) rectified into a water curtain shape having a curved cross-sectional shape (a) is collided with the surface to be cleaned (1). 2. A first cleaning water flow (A) rectified into a water curtain shape in which a cross-sectional shape (a) intersecting the flow direction is curved in a C shape, and collides with the surface to be cleaned (1). The cleaning method according to 1. 3. A cleaning nozzle for use in the cleaning method according to claim 1, wherein a supply channel (8) to which cleaning water is supplied.
And a first water discharge channel (11) for discharging the cleaning water supplied to the supply channel (8) so as to collide with the surface to be cleaned (1).
And the first water discharge flow channel (11) has a channel wall having a curved cross-sectional shape (a) intersecting the flow direction of the wash water to be discharged, on the flow channel wall of the first water discharge channel (11). Wash water flow (A)
A cleaning nozzle in which a first rectifying surface (18) for rectifying is formed. 4. The cross-sectional shape (a) of the first straightening surface (18) intersecting the flow direction of the wash water discharged is C.
The cleaning nozzle according to claim 3, wherein the cleaning nozzle is formed so as to rectify the first cleaning water flow (A) in the shape of a water curtain curved in a shape. 5. The flow passage cross-sectional area of the first water discharge flow passage (11) is set to be wider toward the downstream side.
Or the cleaning nozzle according to 4. 6. The supply channel (8) is formed in a tubular shape,
The cleaning nozzle according to claim 3, 4 or 5, wherein the first water discharge channel (11) is in communication with the supply channel (8) in the radial direction. 7. A flow path end surface (15) for closing the downstream side of the supply flow path (8) is formed, and the first rectifying surface (18) is arranged in a state of being connected to the flow path end surface (15). The cleaning nozzle according to claim 6. 8. A second water discharge channel (12) for discharging the cleaning water supplied to the supply channel (8) to collide with the surface to be cleaned (1) is connected to the supply channel (8). , The second
A second flow straightening surface (20a, 32) for straightening the discharged wash water into a flat water curtain-shaped second wash water flow (B) is formed on the flow passage wall of the water discharge flow passage (12). 1 water discharge channel (1
1) replaces the first wash water stream (A) with the second wash water stream (B)
The cleaning nozzle according to claim 3, 4, 5, 6 or 7, wherein the cleaning nozzle is arranged so as to collide with the surface to be cleaned (1) on the downstream side of the position where the surface collides with the surface to be cleaned (1).