U.S. patent application number 10/765282 was filed with the patent office on 2004-11-04 for system for creating waves or movement of the surface of a liquid.
This patent application is currently assigned to WOW COMPANY S.A.. Invention is credited to Demarteau, Joseph.
Application Number | 20040216226 10/765282 |
Document ID | / |
Family ID | 33304403 |
Filed Date | 2004-11-04 |
United States Patent
Application |
20040216226 |
Kind Code |
A1 |
Demarteau, Joseph |
November 4, 2004 |
System for creating waves or movement of the surface of a
liquid
Abstract
A system for creating waves at the surface of a liquid contained
in a pool, this system comprising: several injectors linked to a
source of fluid under pressure, a device controlling the speed
and/or pressure control of the fluid ejected from the injectors
and/or the direction of the injectors. and in which the control
device ideally contains a means of detecting one or more states of
at least a part of the surface of the liquid and a means of
adapting the speed and/or pressure of the fluid output from the or
injectors, and/or the direction of the injectors in relation to the
surface state of the liquid.
Inventors: |
Demarteau, Joseph; (Namur,
BE) |
Correspondence
Address: |
SUGHRUE MION, PLLC
2100 PENNSYLVANIA AVENUE, N.W.
SUITE 800
WASHINGTON
DC
20037
US
|
Assignee: |
WOW COMPANY S.A.
|
Family ID: |
33304403 |
Appl. No.: |
10/765282 |
Filed: |
January 28, 2004 |
Current U.S.
Class: |
4/613 |
Current CPC
Class: |
E04H 4/0006
20130101 |
Class at
Publication: |
004/613 |
International
Class: |
A47K 003/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 29, 2003 |
BE |
2003/063 |
Claims
What I claim is:
1. A system for creating waves at the surface of a liquid contained
in a pool presenting an average level, this system comprising: one
or more means of action on the liquid chosen from injectors and
explicit vortices one or more pipe to link the means of action to
one or more source of a fluid under pressure superior to the
pressure exercised by the liquid on the means of action a control
device chosen from the group comprising devices to control the
speed of the fluid ejected from the means of action, devices to
control the pressure of fluid ejected from the means of action,
mobile directional systems for one or more means of action, a mask
system, a mobile directional flow system for the means of action.
in which said means of action are chosen from a group comprising:
means of action that, at least in an intermittent fashion, direct
the fluid in the liquid according to a principal direction forming
an angle between -30.degree. and 30.degree., in relation to a
vertical axis. means of action that, at least in an intermittent
fashion, will direct the fluid in the liquid according to a
principal direction forming an angle between -30.degree. and
30.degree., in relation to a horizontal axis. means of action that
direct, at least in an intermittent manner, the fluid along one or
more wall submerged in the liquid. means of action that direct, at
least in an intermittent manner, the fluid against one or more wall
submerged in the liquid. means of action that direct the fluid in
the direction of movement of an action zone of one or more other
means of action. means of action directing the fluid into an action
zone crossing the action zone of one or more other means of action.
means of action directing the fluid in a direction opposing the
direction of an action zone of one or more other means of action,
and with a combination of these, and in which the control device
comprises a means adapting one or more parameter of the fluid
ejecting from aforesaid to one or more means of action in relation
to the surface state of at least part of the liquid, said parameter
being chosen from a group comprising the speed of the fluid, the
pressure of the fluid, the direction of the fluid, and combinations
of these.
2. The system of claim 1, comprising several means of action.
3. The system of claim 1, comprising a means of detection of a
surface state of the liquid.
4. The system of claim 1, comprising at least four means of
action.
5. The system of claim 1, comprising at least 20 means of
action.
6. The system of claim 1, in which each means of action is adapted
to ensure a fluid speed at the output of the means of action such
that the speed of fluid at its site of action on the liquid is
greater than 2 m/s, being understood that this speed is greater
than the wave speed in this area.
7. The system of claim 1, in which each means of action is adapted
to ensure a fluid speed at the output of the means of action such
that the speed of fluid at its place of action on the liquid is
greater than 10 m/s, being understood that this speed is greater
than the wave speed in this area.
8. The system of claim 1, in which each means of action is adapted
to ensure a fluid speed at the output of the means of action such
that the speed of fluid at its place of action on the liquid is
greater than 15 m/s, being understood that this speed is greater
than the speed of the wave in this area.
9. The system of claim 1, in which each means of action is adapted
to ensure a maximum fluid output of less than 2 l/s per means of
action.
10. The system of claim 1, in which each means of action is adapted
to ensure a maximum fluid output of less than 1 l/s per means of
action.
11. The system of claim 1, in which each means of action is adapted
to ensure a maximum fluid output of less than 0.5 l/s per means of
action.
12. The system of claim 1, in which each means of action is adapted
to ensure a maximum fluid output of less than 0.25 l/s per means of
action.
13. The system of claim 1, in which each means of action is adapted
to ensure an action zone of over 20 cm in length.
14. The system of claim 1, in which each means of action is adapted
to ensure an action zone of over 40 cm in length.
15. The system of claim 1, in which each means of action is adapted
to ensure an action zone at least equal in length to the difference
in level between the minimum wave trough level, and the maximum
wave peak level.
16. The system of claim 1, in which the control system ensures an
injection of fluid by one or more means of action into an area of
the pool when the wave goes in the same direction as the direction
of the means of action.
17. The system of claim 1, in which it comprises a first series of
means of action, and a second series of means of action, and in
which the control mechanism controls one or more parameter chosen
from amongst speed, pressure and direction of the fluid output from
the means of action, such that when the speed and/or pressure of
the fluid output from the means of action is detectably nil, the
speed and/or pressure of the fluid output from the means of action
of the other series is detectably maximum.
18. The system of claim 1, comprising a first series of means of
action, and a second series of means of action, and in which the
control mechanism controls one or more parameter chosen from
amongst speed, pressure and direction of the fluid output from the
means of action, such that when the speed and/or pressure of the
fluid output from the means of action is nil, the speed and/or
pressure of the fluid output from the means of action of the other
series is maximal.
19. The system of claim 1, comprising at last one appreciably
vertical series of means of action and one formed piece, adapted to
the shape of a form chosen from the shape of a corner and a
submerged edge of the pool.
20. The system of claim 19, in which the formed piece contains an
absorber to dissipate to dispel the jet of a continuous means of
action in its inactive phase.
21. The system of claim 1, including one means chosen from a group
comprising the means to create a fluid under pressure and the means
to create a fluid presenting a speed superior to that of the
wave.
22. The system of claim 21, including one means to create a fluid
presenting, after its release, a speed superior to the speed of the
liquid in the wave, in the area where the speed of the wave is
maximal.
23. The system of claim 1, in which the means chosen from a group
comprising the means to create a fluid under pressure and the means
to create a fluid presenting a speed superior to that of the wave,
is chosen from the group comprising the means of pressurizing a
gas, means of pressurizing a liquid, and means to ensure the speed
of a fluid.
24. The system of claim 1, including one or more pumps submerged in
the pool.
25. The system of claim 1, comprising a control device chosen from
a group comprising control mechanisms controlling the direction of
the jet of fluid ejected from the means of action, control
mechanisms controlling the intermission of the jet of fluid ejected
from the means of action and the control devices controlling a
component capable of being placed in the flux of the fluid output
of a means of action. said control device comprising: a submerged
component presenting one surface with one or more window for the at
least intermittent passage of fluid ejected from one or more means
of action, and a system chosen from a system inducing a relative
movement between the output of one or more means of action and the
window of the immersed component and a system controlling a
relative movement between the window and a closing component
adapted to seal, al least partially, said window.
26. The system of claim 25, in which the system is linked to one or
more means of action destined to induce a rotational movement of
said means of action
27. The system of claim 1, which comprises a control device chosen
from a group comprising control mechanisms controlling the
direction of the jet of fluid ejected from the means of action,
control mechanisms controlling the intermittent operation of the
jet of fluid ejected from the means of action and the control
devices controlling a component capable of being placed in the flux
of the fluid output of a means of action. said control device
comprising: a submerged component presenting one surface with one
or more window for the at least intermittent passage of fluid
ejected from one or more means of action, and a system chosen from
a system inducing a relative movement between the output of one or
more means of action and the window of the immersed component and a
system controlling a relative movement between the window and a
closing component adapted to seal, al least partially, the
aforementioned window. in which the system is linked to one or more
means of action destined to induce a rotational back-and-forth
movement of the aforesaid means of action
28. The system of claim 27, in which the system is adapted to
ensure a back-and-forth movement having an amplitude between
-15.degree. and +15.degree. from an upwards vertical direction.
29. Process for creating waves on the surface of a liquid contained
in a pool, in which one or more fluids is injected into the liquid
by means of various means of action, and the function of the means
of action is controlled such that one or more means of action act
upon the liquid to ensure an effect chosen from among a group
comprising: amplification of the trough of a wave, amplification of
the peak of a wave, amplification of a horizontal movement, and
combinations of these.
30. Process for creating waves on the surface of a liquid contained
in a pool, in which one or more fluids is injected into the liquid
by means of various means of action, and the direction of the fluid
ejected from the means of action is controlled such that one or
more means of action act upon the liquid to ensure an effect chosen
from a group comprising: amplification of the trough of a wave,
amplification of the peak of a wave, amplification of a horizontal
movement, and combinations of these.
31. The system of claim 29, in which the system is used in a pool
of average level, this system comprising: one or more means of
action on the liquid chosen from injectors and explicit vortices
one or more pipes to link one or more means of action to one or
more sources of a fluid under pressure superior to the pressure
exercised by the liquid on one or more means of action, a control
device chosen from the group comprising devices to control the
speed of the fluid ejected from the means of action, devices to
control the pressure of fluid ejected from one or more means of
action, mobile directional systems for one or more means of action,
a mask system, a mobile directional flow system for the means of
action. in which one or more of the aforementioned means of action
are chosen from a group comprising: means of action that, at least
in an intermittent fashion, will direct the fluid in the liquid
according to a principal direction forming an angle between
-30.degree. and 30.degree., in relation to a vertical or horizontal
axis. means of action, which, at least in an intermittent fashion,
will direct the fluid in the liquid according to a principal
direction forming an angle between -30.degree. and 30.degree., in
relation to a vertical or horizontal axis. means of action, which
will, at least in an intermittent manner, direct, the fluid along
one or more walls submerged in the liquid. means of action, which
will, at least in an intermittent manner, direct the fluid against
one or more walls submerged in the liquid. means of action, which
will direct the fluid in the direction of the movement of an action
zone of one or more other means of action. means of action
directing the fluid into an action zone crossing the area of action
of one or more other means of action. means of action directing the
fluid in a direction opposing the direction of an area of action of
one or more other means of action, and with a combination of these,
and in which the control device contains a means adapting at least
one parameter of the fluid ejecting from aforesaid to one or more
means of action in relation to the surface state of the liquid, the
aforementioned parameter being chosen from a group comprising the
speed of the fluid, the pressure of the fluid, the direction of the
fluid, and combinations of these.
32. The procedure of claim 30, in which one uses a system in a pool
of average level, this system comprising: one or more means of
action on the liquid chosen from injectors and explicit vortices
one or more pipes to link one or more means of action to one or
more source of a fluid under pressure superior to the pressure
exercised by the liquid on one or more means of action, a control
device chosen from the group comprising devices to control the
speed of the fluid ejected from the means of action, devices to
control the pressure of fluid ejected from one or more means of
action, mobile directional systems for one or more means of action,
a mask system, a mobile directional flow system for the means of
action. in which one or more of the aforementioned means of action
are chosen from a group comprising: means of action which, at least
in an intermittent fashion, will direct the fluid in the liquid
according to a principal direction forming an angle between
-30.degree. and 30.degree., in relation to a vertical axis, means
of action, which, at least in an intermittent fashion, will direct
the fluid in the liquid according to a principal direction forming
an angle between -30.degree. and 30.degree., in relation to a
horizontal axis. means of action that will, at least in an
intermittent manner, direct, the fluid along one or more wall
submerged in the liquid. means of action which will, at least in an
intermittent manner, direct the fluid against one or more wall
submerged in the liquid, means of action, which will direct the
fluid in the direction of the movement of an action zone of one or
more other means of action. means of action directing the fluid
into an area of action crossing the action zone of one or more
other means of action. means of action directing the fluid in a
direction opposing the direction of an action zone of one or more
other means of action, and with a combination of these, and in
which the control device contains a means adapting one or more
parameter of the fluid ejecting from aforesaid to one or more means
of action in relation to the surface state of the liquid, the
aforementioned parameter being chosen from a group comprising the
speed of the fluid, the pressure of the fluid, the direction of the
fluid, and combinations of these.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a system for creating waves
or movement on the surface of a liquid contained in a pool.
STATE OF THE ART
[0002] A number of wave-making systems have already been
proposed.
[0003] Thus, it has been proposed that the side wall of a swimming
pool or its bottom be fitted with a pipe attached to a piston such
that, as water is sucked through one end of the pipe, water exits
at the other end into the pool. The creation of movement requires a
considerable quantity of water to be impelled and expelled.
[0004] There have also been proposals for objects that are to move
in a vertical plane above the surface of the pool. Such mechanisms
have the disadvantage of being too visible and do not provide
optimal functionality.
[0005] It is also known that there are baths equipped with jet
streams that provide large volumes of water, in which the water
output is substantially horizontal. The jet may or may not be
controlled according to the state of the surface of an area of the
bath.
[0006] Finally, there is also a floating ball (WOW.RTM. as marketed
by the applicant) capable of creating waves on the surface of the
water in a swimming pool. Such a ball provides excellent
amplification of wave movement, this amplification being
progressive. Such a floating ball does however reduce the usable
surface of the pool, both by its volume and by its location (in the
middle of the pool, or at least, away from its edges.) Such a ball
can be fairly heavy.
[0007] The present invention relates to a simple system that allows
the creation and control of movement at the water's surface; the
said system offers one or more of the following advantages:
[0008] system can be placed in parts of the pool not used for
swimming
[0009] easily installed in an existing pool
[0010] better movement or turbulence of the water along the pool
walls,
[0011] system is not visible
[0012] possibility of creating massage areas in a section of the
pool
[0013] very safe system from the point of view of swimmers'
safety.
[0014] etc.
GENERAL DESCRIPTION OF THE INVENTION
[0015] This is a system designed to create waves or movement at the
surface of a liquid contained in a pool of average level. The
system comprises:
[0016] one or more means of acting upon the liquid, chosen from
amongst injectors and explicit vortices; preferably several means
of action chosen from injectors and explicit vortices, preferably
situated and directed in areas and in directions where their effect
is optimal.
[0017] one or more pipe to link one or more means of action to one
or more source of a fluid under a higher pressure superior than
that exercised by the liquid on one or more of the means of action
under consideration,
[0018] a device to control the speed and/or the fluid pressure of
the fluid output from one or more means of action, or a mobile
directional system for one or more of these means of action, or a
mask system, or mobile directional flow system for one or more of
the means of action.
[0019] in which the said means of action are chosen from a group
comprising:
[0020] means of action directing, at least in an intermittent
fashion, the fluid in the liquid according to a principal direction
or in a direction within a cone (in either 2 or 3 dimensions)
forming an angle between -30.degree. and 30.degree., for example
from +15.degree.0 to -15.degree., preferably between -10.degree.
and +10.degree., and ideally between -5.degree. and +5.degree., or
even less, in relation to a vertical or horizontal axis.
[0021] means of action directing, at least in an intermittent
manner, the fluid along and/or against a wall submerged in the
liquid.
[0022] means of action or injectors, directing, in an intermittent
manner, the fluid to move in the direction of movement of an action
zone [we understand `action zone` to mean the area in which, by its
own movement, the injection causes or amplifies the movement of a
mass of water or liquid in the pool, in such a manner that the
overall speed of the fluid at the site of action or in the action
zone is higher than the natural speed of the liquid if this action
had not occurred. In particular the overall speed of the fluid at
the site of action will be more than twice the speed of the fluid
at the injector output, preferably more than 5 times the speed of
the fluid at the injector output, and ideally 10 times the speed of
fluid at the injector output, for example between 20 and 50 times
the speed of fluid at the injector output, the important issue
being that fluid speed in the action zone be superior to its speed
in the absence of injectors] of one or more means of action or
injectors or crossing an action zone of one or more means of action
or other injectors, and
[0023] with a combination of these,
[0024] and in which the control device contains a means which
adapts the speed and/or pressure and/or the direction of the fluid
output from one or more means of action or injectors, in relation
to the surface state of a part of the liquid surface, this surface
state being preferably detected by a means of detection.
[0025] The system comprises one or more, even at least four,
preferably at least ten, ideally at least 20 means of action,
namely injectors. The number of means of action, namely injectors,
depends on the shape of the pool, the volume of the pool, the wave
types, the time taken for the waves to achieve a specific height,
etc. The larger the number and greater the power of the means of
action, namely injectors, the more precisely the waves formed on
the surface of the pool can be regulated. The total number of means
of action, namely injectors, may for example be 30, 40, 50, 75,
100, 150, 200, or perhaps even more; these small means of action,
namely injectors, being ideally assembled into groups of more than
3 means of action or injectors for example between 5 and 30 means
of action or injectors each group of means of action or injectors
acting in an area of the pool or having an action zone within an
area of the pool, in particular in an area of the pool adjacent to
a side wall of the pool.
[0026] Preferably each means of action or injector will be adapted
to achieve a fluid speed at the output of each means of action or
injector (area of action) above 2 m/s, preferably above 10 m/s,
ideally greatly higher than 15 m/s, in such a way as to bring to
the area of effectiveness of the means of action or injector speeds
above that of the water's natural movement, more specifically
higher than 15 m/s and/or to achieve an action zone--perhaps in
conjunction with one or more means of action or injectors--with a
length of over 20 cm, preferably more than 40 cm, ideally more than
50 cm, more specifically of at least the difference in levels
between the level of the smallest wave trough and the highest wave
peak.
[0027] The means of action or injectors are preferably placed along
the side wall(s) of the pool so as to act in the areas of the pool
where the waves trough and/or peak, the means of action or
injectors being preferably positioned in groups separated from each
other by a distance approximately equal to an integer multiple of
one quarter of a wavelength, or even an integer multiple of one
half of the wavelength of the desired or predetermined wave. In the
event that certain vertical means of action or injectors act upon
the antinodes (troughs--crests) and other horizontal ones act upon
the nodes (no vertical displacement) the vertical means of action
or injectors are placed such that their action is situated a
quarter of a wavelength apart from the horizontal ones.
[0028] The means of action, or injectors could equally be arranged
at the bottom of the pool, in an area or areas away from the edges
of the pool where peaks and troughs are anticipated.
[0029] Ideally, each means of action or injector is adapted to
achieve a maximum fluid output of less than 2 l/s, preferably less
than 1 l/s, ideally less than 0.5 l/s, more particularly less than
0.25 l/s. Preferably, the fluid output from the means of action or
injector will be reduced, but said fluid will be ejected with
considerable speed so as to generate a wave surge particularly in
the action zone. Larger outputs are possible with larger means of
action or injectors for example to agitate the liquid in a large
volume pool.
[0030] More particularly, the means of action or injectors will be
adapted to be used alone, or in conjunction with one or more
others, to create an action zone at least on the crest or on the
trough of a wave. The means of action or injectors will for example
be adapted to ensure that the fluid reaches a height above that of
the highest wave, or to reach a point lower than the lowest wave
level, so as to increase the wave effect.
[0031] Preferably, the control system will inject the fluid by one
or more means of action or injectors into an area of the pool as
the liquid level in the area is in its ascent phase.
[0032] One or more means of action or injectors are preferably
improved or linked to a specially built vortex system or Venturi
system, creating, as does the simple injector, an intake of liquid
from the pool and ejecting it to create a wave. The vortex or
Venturi system can be fitted with one or more systems to control
the quantity of liquid taken in or ejected from the vortex or
Venturi.
[0033] In one form of embodiment, the system comprises a first
series of means of action, namely injectors, and a second series of
means of action, namely injectors, and the control mechanism
controls the speed and/or pressure of the fluid from the means of
action or injectors such that when the speed and/or pressure of the
fluid output from the means of action or injector is nil, or
detectably nil, the speed and/or pressure of the fluid output from
the means of action or injectors in the other series is maximal or
detectably maximal. The means of action or injectors are linked in
either a vortex shape, on rails, on linear or vertical slopes or
curves, possibly inclined in relation to a horizontal surface, in a
fan formation, etc
[0034] In a detail of an embodiment of the invention, the system
comprises one or more substantially vertical series of means of
action or injectors and one formed piece, adapted to the shape of a
submerged edge of the pool. This formed piece preferably has a
shape that guides the liquid in the pool away from the dead areas
of the pool. Moreover, this formed piece can possibly contain an
absorber or dissipater to dispel the jet of a means of action, or
continuous injector, in its inactive phase
[0035] In one form of embodiment, the system comprises more than
one series of means of action or injectors, each series of means of
action or injectors being linked to a separate formed piece. Each
series is for example situated in a corner of the pool. In
particular, a series of means of action or injectors is situated
substantially in each corner of the pool.
[0036] In a detail of another embodiment, the system comprises more
than one series of means of action or injectors, for instance, two
series of means of action, or injectors being linked to a first
formed piece, whilst two other series of means of action or
injectors are linked to a second formed piece. The formed pieces
are for instance placed along the length of the shorter opposing
walls of the pool. The formed pieces with distribution lines of
means of action or injectors may be situated between said first and
second sections, for instance in the vicinity of the bottom of the
swimming pool or pool.
[0037] The system preferably comprises a means of creating a fluid
that is pressurised and/or accelerated. Such means being for
example a gas, air or vapour compressor, a turbine, a liquid, water
or carbonated water compressor, a liquid pump (centrifugal or
volumetric), a pump submerged in the pool, or a combination of
these methods. The method is therefore preferably chosen from the
group comprising methods of putting gas under pressure,
particularly air, vapour, hot air, methods of putting liquid under
pressure, particularly water, methods for moving fluids at speed,
particularly water. In certain possible applications (such as
chemical processes, treatment processes, etc.) several additives or
reagents or active agents may be added to the fluid (such as
chemical reagents, bacteria, anti-bacterial agents, anti-fungal
agents, anti-algae agents, etc.)
[0038] The system as per the invention preferably comprises one or
more pumps submerged in the pool, or placed in technical zones,
these pumps pumping liquid from the pool to propel it across one or
more injectors, or using liquid external to the pool, possibly
already under pressure.
[0039] In one form of embodiment, a control device controls the
direction of the fluid emitting from the means of action or
injectors and/or controls a component capable of being placed in
the flux of the fluid output from the means of action, or
injectors.
[0040] In particular, the control device comprises:
[0041] a submerged component presenting one surface with one or
more window for the at least intermittent passage of fluid ejected
from one or more of the means of action or injectors and
[0042] a system inducing a relative movement between the output of
one or more means of action or injectors and the window of the
immersed component and/or controlling the relative movement between
the window and a closing component adapted to seal, al least
partially, said window.
[0043] In a preferred embodiment, the system is linked to one or
more means of action or injectors so as to induce in the said
injector(s) or at least in a number thereof, a rotational or
pivotal movement, preferably in the form of a back-and-forth
movement. For example the system induces a pivotal movement between
-15.degree. and +15.degree. relative to an upward-facing vertical
rudder.
[0044] The invention also includes a pool that is destined to
contain a liquid at the surface of which waves are created; said
pool being associated with at least one system created using this
invention. Such a pool might be for example a water treatment pool,
a purification pool, a reaction chamber, or in particular, a
swimming pool.
[0045] The object of the invention is equally to create waves at
the surface of a liquid contained in a pool, in which
[0046] fluid is injected into the liquid by various means of action
or injectors and
[0047] the functioning of the injectors is controlled in order that
one or more means of action or injectors act so as to either
amplify the trough of a wave, or to amplify the peak of a wave (or
to amplify the horizontal movement of a wave).
[0048] In this procedure, a system used as outlined in this
invention is advantageous.
[0049] The details and features of the invention will be outlined
in the detailed description that follows, in which reference is
made to the attached drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0050] In these drawings,
[0051] FIG. 1 is a diagrammatic view of a swimming pool fitted with
the system as per the invention;
[0052] FIG. 2a is a diagrammatic view of a swimming pool showing
two distribution lines with a series of injectors;
[0053] FIG. 2b is a diagrammatic view of a swimming pool with four
distribution lines with a series of injectors;
[0054] FIG. 2c is a diagrammatic view of a swimming pool with a
distribution line with five series of independently controlled
injectors;
[0055] FIG. 3 is a diagrammatic view of a system as per the
invention;
[0056] FIG. 4 is a diagrammatic view of another system as per the
invention;
[0057] FIGS. 5a and 5d show the amplification of movement at the
surface of the water;
[0058] FIG. 6 is a view showing the direction of the jet emanating
from the injectors;
[0059] FIG. 7 shows a vortex used to increase efficiency;
[0060] FIGS. 8a and 8b show systems comprising a Venturi;
[0061] FIGS. 9a and 9b show a system acting intermittently on the
flow of fluid ejecting from an injector;
[0062] FIGS. 10a and 10b show a system controlling the pivoting of
the injector or the injector distribution line;
[0063] FIGS. 11a and 11b show a system acting on the injector
outlet pipe; and
[0064] FIGS. 12a and 12b show a system show a system comprising a
rotating distributor controlling the functioning of an
injector;
[0065] FIG. 13 is an assembly of FIGS. 1 and 10a, serving as an
illustration for the abstract, and the contents are marked for
reference.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0066] FIG. 1 shows a substantially parallelepipedal swimming pool
1 comprising a filtration system 2. This filtration system
comprises a water reception tank 3 (filled by overflow when the
water from the pool next to the water reception tank passes above a
set limit, for example the system of pool overflow channels, or a
system of skimmers or even by a door 4 whose vertical position can
be set or controlled). The water passing into the tank is led to a
pump P that propels water into a filtration device F and then into
a channel 5 to take filtered water through an opening 6 situated in
the bottom 7 of the pool or other locations on the bottom or in the
walls. The pool can be in any shape whatsoever, the
parallelepipedal shape serving merely as an illustration.
[0067] The pool is also equipped with a system for creating waves
at the surface of the water in the pool. This system comprises a
series of injectors 8 (three are shown, however the pool can for
example be fitted with 20, 50 or even more injectors), each
injector 8 being itself, or specifically linked to, a vortex device
9 (see FIG. 7). The injectors 8 are linked by a pipe 10 to a pump
PV, which is linked by a tube 11 to the channel 5, which is
designed to take filtered water back into the pool. The pump PV is
designed to take water that has been filtered and preferably
supplemented with an agent (disinfectant, chlorine, biocide,
fungicide, anti-algae, etc) coming from a reservoir 12 or present
in filter F, into the injectors 8. The water is pressurised,
possibly at variable times, in the pipe 10, this pressure varying
for example between a minimum pressure of 0.2 bar (0.2 10.sup.5 Pa)
and a pressure of 20 bars (20 10.sup.5 Pa). Pipe 10 may be
equipped, with a valve 13a in the vicinity of the injectors 8 or a
valve 13b in the technical location. Water output from the
injectors 8 is ejected at a speed greater than 15 m/s and with a
rate of flow less than 0.5 l/second per injector (except for large
injectors) for example less than 0.25 l/second. The speed of water
ejected from the injector will be preferably chosen so that the
injector's action zone ZA extends at least substantially to the
vicinity of the surface of the liquid SL, the level of which can
vary between a maximum level NM1 and a minimum level NM2. Injectors
are preferably placed beneath the minimum water level,
corresponding to the trough of a wave of maximum amplitude, while
the speed of water ejected from the injectors is preferably chosen
such that when the injector pushes a wave upwards, the jet of water
ejecting from the injector is of sufficient speed to at least
partially eject above the wave.
[0068] To regulate the speed of water ejected from the injectors 8,
an electronic device 15 receives information from a sensor or
detector 14 on the height of the wave for example in the zone
situated above the injectors 8, or in an unperturbed zone whose
phase difference is known. Once the sensor 14 (which measures for
example pressure or acceleration on the peak of a wave, or surface
movement--ultrasound, optical, etc) detects the crest or close to
the crest of a wave, the electronic device controls the pump PV
and/or the valves 13a or 13b to increase the water pressure in pipe
10 and to push the water out through the injectors 8 with
sufficient force to multiply or increase the wave level or to
increase the amplitude of the waves. As soon as the electronic
device detects a movement towards the lower water level in the zone
situated above the injectors 8, the electronic device stops the
pump PV functioning or closes a valve 13.
[0069] The link between the information from the sensor and the
command could judiciously be treated as though occurring in a
repetitive cycle, and therefore one could optimally speed up the
triggering of the injectors such that their action begins de facto
at the right moment without delay due to the triggering system.
[0070] Water output from the injectors is ejected at considerable
speed (at the time of the operation to raise the wave) such that it
causes the water adjacent to the injectors to be swept along and to
push this mass of water (water ejecting from the injectors+water
swept along by the water ejecting from the injectors) It has been
noted that when using the injectors propelling a low output volume
of water at high speed that the effect of the injector is
substantially independent of the speed of the wave. The injector
thus exerts a force on the liquid rather than necessarily
displacing a considerable mass of this liquid. The injectors are
therefore designed to transfer power.
[0071] The injectors 8 are placed in the vicinity of a side wall of
the pool at a level situated below the minimum level NM2, for
example at a level situated from 20 to 200 cm below the minimum
level NM2, for example between 30 and 100 cm. A formed piece 16 is
linked to the injectors 8, this section 16 extending between the
bottom of the pool and the wall along which the injectors are
extended. This curve acts as a protection for the injectors 8, but
also forms a guide for the water moving at the bottom level of the
pool. Moreover, this formed piece could possibly contain an
absorber or dissipater to distribute the jet of a continuous
injector in its inactive phase.
[0072] The injectors are for example substantially monodirectional,
for example with a dispersion angle between +15.degree. and
-15.degree. (preferably between -10.degree. and +10.degree.;
ideally between -5.degree. and +5.degree.) from the central axis of
the flow of water ejecting from the injector.
[0073] They should, if placed side by side, form a curtain, or when
spread out across an area, a cone or a conical ellipse.
[0074] The pump PV is preferably equipped with a safety system 17,
18 such that, as soon as the pressure in the channel exceeds a
safety value, valve 18 opens to permit a passage of water through
channel 17 from the exit to the entrance of the pump.
[0075] The pump P, the filter F, the pump PV and the control device
are preferably situated in the same service space.
[0076] FIG. 2a shows a pool 1 similar to that shown in FIG. 1. This
pool 1 is linked with two distribution rails 20,21 of injectors 8.
These injectors 8 are placed in the vicinity of the bottom of the
pool 22, along a lateral distribution line 23 (for example
extending along the length of the pool LARG). The injectors 8 on
distribution line 20 are attached in a pattern of three series of
injectors, a first series 80 (for example of at least 5, preferably
at least 10 injectors, for example 20, 30, 50 injectors) situated
in the vicinity of the first corner 24 a second series 81 (for
example of at least 5, preferably at least 10 injectors, for
example 20, 30, 50 injectors) situated in another corner 25 and of
at least a series 82 of injectors (preferably comprising a larger
number of injectors than the number of injectors in a corner, for
example twice, or more than twice, the number of injectors in a
corner series), said series 82 being situated in relation to a
series of injectors in a corner at a distance equal to a whole
multiple of a wavelength LO of a wave formed in the pool. In the
form shown (where one single series 82 is placed between series 80
and 81) series 82 is situated at a mid point between series 80 and
81.
[0077] The injectors 8 on distribution line 21 are affixed in the
form of a series of injectors 83, 84 comprising preferably a larger
number of injectors than the number of injectors in a corner, for
example twice or more times the number of injectors than the number
of injectors in a corner series. Each series 83, 84 is situated
between two series (80, 81, 82) of injectors 8 on the first
distribution line 20. For example each series 83, 84 is situated at
a mid point between the two series (80, 82; 82, 81) of injectors on
the first distribution line 20.
[0078] The injectors 8 are protected by a formed piece 16.
[0079] Distribution lines 20, 21 are link to a source of
pressurised fluid (P1, P2) and a control mechanism 15 controlling
valves 90, 93 by means of one or more pressure sensors 100, 101,
102, 103, 104. For example, each sensor detects a wave state in the
area situated above a series of injectors. This allows the
functioning of each series to be controlled independently of the
others as a function of the state (level) of the wave in the area
situated above the relevant series of injectors.
[0080] Equally, a centralised control is possible. The sensors
could equally be level, sound, optical or acceleration types. The
control device receives information from the sensors 100, 101, 102,
103 and 104 via a cable 30 or a RF transmission system, sonar, IR
optic, with or without fibre optic cable, and sends instructions to
valves 90, 93 by a cable 31, and by means of an electronic control
system.
[0081] Preferably this same fluid is injected by injectors 8 on the
distribution line 20 and by the injectors on distribution line 21.
Nevertheless in a possible embodiment of the invention,
distribution line 20 allows the injection of a first fluid (water)
whereas the other distribution line allows the injection of a
second fluid, different from the first (for example, a gas, air,
oxygen, carbonated gas, water with different properties to that
used in distribution line 20, etc.)
[0082] In one form of embodiment, the same distribution line can
also simultaneously inject two elements of air and water.
[0083] FIG. 2b is a view of a pool similar to that shown in FIG.
2a, except that it comprises four distribution lines 20, 20bis, 21,
21bis of injectors, the injectors 8 of a first pair of distribution
lines 20, 21 being situated in the vicinity of a first side wall 23
of the pool, whereas the injectors 8 on the other two distribution
lines 20bis 21bis are situated in the vicinity of another wall,
preferably wall 23bis opposite wall 23.
[0084] FIG. 2c is a view of a pool comprising a distribution line
20 with five series of injectors 80, 81, 82, 83, 84 each linked to
the distribution line 20 by an individual valve 70, 71, 72, 73, 74.
Each valve comprises or is linked to a control system and/or
controller (such as a micro controller, a micro mechanism, a
microprocessor, a float, a flue valve float, a valve float)
receiving an indication of the liquid level in a given area.
[0085] FIG. 3 is a view of a particular embodiment for a device to
inject water into the corner of a pool. The device comprises a
formed piece 16 that extends between the bottom 22 of the pool and
the two lateral walls (23, 23ter). The water from the pool is able
to pass under the section 16 through the openings 27. A submerged
pump 32 functioning with a low voltage electricity supply (for
example, 12 volts, 24 volts, 36 volts) is placed below the section
16. The electricity supply to pump 32 is provided by means of a
cable 33 linked to a source of electricity and a control device 15
and passing through opening 6.
[0086] The pump 32 thus pumps water from the pool and forces this
water through a head 34 presenting a series of openings 35 such
that a group of water jets are created with low output but at high
speed. The jets moving from head 34 form water pressure PE
presenting a central axis (preferably vertical or substantially
vertical) 36. The alpha angle of the opening of the series of jets
37 emanating from the head is between 5 and 10.degree.. The jet
speed is chosen so that the action zone ZA of the jets is extended
beyond the maximum wave level, when there is the possibility of
increasing the movement or amplitude of the movement of the wave.
The water is thus forced or driven above the maximum wave level,
forming a sort of miniature fountain or spurting water source. The
jets thus preferably form a current of water coming out of the wave
at a height H of at least 1 cm for example between 5 and 20 cm,
perhaps more, but ideally less than 10 cm. These jets of water
spurting from the pool allow, as well as amplification of the
waves, oxygenation of the pool, circulation of the water, the
formation of mini waves V1 moving on the waves V.
[0087] FIG. 4 is a view of another form of embodiment. In this form
of embodiment, the injectors 8 are situated above the average pool
level N, or in the vicinity of this level. The injectors 8 are
arranged so as to push the water towards the bottom 22 of the pool.
In this form of embodiment, water is ejected from the injectors at
high speed when the sensor detects a wave trough, or a detectable
wave trough. In this embodiment of the invention, the injectors 8
are situated beneath the plank 40 of the diving board, or the
starting block.
[0088] FIGS. 5a and 5d show the levels for the formation of waves
in a type of pool shown in FIG. 2b.
[0089] The injectors on the distribution line 20 are activated to
create an initial swell above the injectors 8 on the distribution
line 20. A first wave is thus created. The injectors 8 on
distribution line 20 are deactivated as soon as the sensor 100
detects that the wave in the zone situated above the distribution
line 20 moves away from the crest of the wave (descending wave
movement). (FIG. 5a)
[0090] The wave is thus propagated towards wall 23bis. As soon as
the sensor 101 detects a state corresponding to a wave swell
movement detectably reaching a peak, the injectors 8 on
distribution line 20bis are activated to push towards the peak of
the wave. The injectors 8 on distribution line 20bis are
deactivated as soon as the sensor 101 detects that the wave in the
zone situated above the distribution line 20bis moves away from the
crest of the wave (descending wave movement). (FIG. 5b)
[0091] Similarly, as soon as the sensor 100 detects a state
corresponding to a detectable wave swell movement reaching a peak,
the injectors 8 on distribution line 20 are activated to push
towards the peak of the wave. The injectors 8 on distribution line
20 are deactivated as soon as the sensor 100 detects that the wave
in the zone situated above the distribution line 20 is moving away
from the crest of the wave (descending wave movement). (FIG.
5c)
[0092] The amplitude of the wave is thus amplified (FIG. 5d).
[0093] FIG. 6 shows possible locations for the injectors. Thus in
the form of embodiment shown in FIG. 6, the corners of the pool are
fitted with a series of vertical injectors inducing, when
activated, an upward surge PV, a series of horizontal injectors
parallel to one wall and adjacent to this wall, these horizontal
injectors inducing a horizontal surge PH1 towards the corner of the
pool, and another series of horizontal injectors parallel to
another wall and adjacent to this other wall, these horizontal
injectors inducing a horizontal surge PH2 substantially
perpendicular to the surge PH1. The injectors in one corner are
activated at the same time as the sensor detects a level
corresponding detectably to a wave trough or a reflux wave
movement. The combined use of vertical and horizontal injectors
whose area of action reaches the action zone ZA of another series
of horizontal injectors, or of vertical injectors, permits an
increase in the speed at which large amplitude waves are formed.
The injectors are deactivated just before the peak of the wave
forms, and preferably reactivated just before the trough of the
wave.
[0094] FIG. 7 is a schematic diagram of a device for increasing the
efficiency of the surge. In the embodiment shown in FIG. 7 the
pressurised water enters a chamber 50 via the pipe 51. This water
then passes along a substantially ring-shaped distributor channel
51B before passing into the injector ring 51A. This water carries
the water entering through the lower part of chamber 52 to exit
towards the upper part of the chamber.
[0095] In FIGS. 8a and 8b a Venturi 55 allows a central (8a) or
lateral (8b) intake of water. In the form illustrated, it is
anticipated that there will be an intake of air into the Venturi,
this intake is achieved through conduit 56. The air intake is for
example obtained by the depression created by the high-speed jet
ejected from the injector 8. The air may also come from a source of
compressed air, this air being introduced into the Venturi in a
continuous or non-continuous manner, preferably in a continuous or
substantially continuous manner, and ideally in a manner
proportional to the water output, and for example in a sinusoidal
or sine-type manner in the same manner as the jet of water. This
addition of compressed air even allows the amplitude of the wave
movement to be further amplified.
[0096] In the embodiment shown in FIG. 9a, the pool includes a
distribution line 20 of injectors 8, this distribution line 20
being situated below the formed piece 16 adjacent to a lower side
of the pool. The formed piece 16 presents a series of openings 200
each positioned above an injector output. A curved piece, or arm
201 is jointed to a shaft 202 and is connected to a control device
203 controlling a pivotal back-and-forth movement. This control
device comprises, in the form illustrated, a cylinder 203A, whose
rod 203B acts on the formed piece 201. The cylinder is pivotally
fixed to the vertical wall of the swimming pool, whereas the rod
203B is pivotally connected to the formed piece 201. This formed
piece 201 is adapted so that a part of the formed piece or the
interdependent closing sections of the formed piece moves between a
position in which the formed piece or the interdependent closing
sections close the openings 200 so as to prevent the fluid output
from the injectors passing through the openings 200 (the flow of
the fluid is then guided into chamber 204 situated under the formed
piece 16), and a position for which the flow of fluid ejected from
the injectors passes through the openings 200 so as to create
movement on the surface of the pool. In this form of embodiment,
the flow and the pressure of the fluid ejected from the injectors
are preferably constant. It is the movement of the formed piece 201
that either acts upon a wave (water passing through the windows) or
does not act upon a wave. Rather than use a cylinder, one might be
able to use another mechanical device, such as an electromagnetic
system, a crankshaft, an alternating motor or geared motor,
etc.
[0097] FIG. 9a shows the position of the formed piece 201 not
closing the openings 200, whereas FIG. 9b shows the position of the
formed piece 201 closing the openings.
[0098] FIG. 10a shows a form of embodiment similar to that in FIG.
9a, except that the injector 8 or the distribution line 20 is
mounted pivotally on a shaft 210. A device controls the pivoting of
the injector or of the formed piece such that the output from the
injector 8 is directed either towards the opening 200 of the formed
piece 16, or onto a closed section of the formed piece 16. In FIG.
10a, the injector 8 is directed such that its outflow passes
through the opening 200 and acts upon the waves. in FIG. 10b the
injector 8 is directed such that the outflow runs up against the
wall of the formed piece 16.
[0099] FIG. 11a shows a form of embodiment similar to that in FIG.
10a, except that the injector 8 is connected to a flexible tube
211, which is connected to a cylinder 203A from which the rod 203B
is connected via a support 212. In FIG. 11a, the tube 211 is placed
such that its outflow passes through the opening 200 and acts upon
the waves. In FIG. 11b, the end of tube 211 is placed or adapted
such that the outflow runs up against the wall of the formed piece
16.
[0100] In FIG. 12a, the form of embodiment comprises a distribution
line 20 with injectors 8. A hollow distributor cylinder 213
presents a series of openings 214 arranged in a regular manner (for
example every 120.degree.). The distribution line 20 is placed in
the hollow 215 of the distributor cylinder 213. A motor (not shown)
turns the distributor cylinder 213 such that the fluid output from
the injectors passes for a period of time through the windows 214,
and for another period of time flows against an interior wall of
the cylinder distributor 213 (wall situated between two openings
214). The distributor cylinder 213 is preferably mounted on
bearings supported by the opposite wall of the pool. By controlling
the rotation speed of the distributor cylinder 216 the times during
which the injectors have an action upon the wave can be
controlled.
[0101] It is possible to make numerous modifications to the forms
of embodiment shown in these figures.
[0102] The injectors, instead of injecting water, could inject
another fluid such as gas, for example air, oxygen, nitrogen,
oxygen-enriched air, etc or a mix of these, this other fluid being
injected in combination or not with a liquid.
[0103] In the system as per the invention, the operation of the
injectors must be controlled. The injectors' are preferably
synchronised in terms of both frequency and relative phase. This
synchronisation is achieved by sensors and an electronic device or
control mechanism. In the event that an electronic system is used,
the system may include means of controlling the injectors allowing
a rapid transition from one type of wave (wave length, amplitude,
frequency of waves, etc.) to another type of wave. In this instance
the injectors possibly function when the sensor detects a wave
trough, or an upward wave movement towards in a given area.
[0104] The injectors are specifically arranged along a wall, in
particular along a lateral (or longitudinal) wall, preferably in
the vicinity of the bottom of the pool in the case of vertical
injectors. Some or all of the injectors may also be situated in
other places, for example at the centre of the bottom of the pool,
between the walls, in a chamber adjacent to the pool, in a chamber
created within the pool. The injectors, or some injectors, can be
placed at a distance from the edge or transversally to an edge, for
example at the point of the antinode of the wave to be formed.
Placed at the bottom, or close to the bottom (preferably combined
with a protective cover) the injector does not disturb the
circulation in the pool or its use. The exact position of the
injectors for a given tank or swimming pool may be obtained by an
experimental study or by physical simulation models.
[0105] The injectors or series of injectors are in phase, or in
counter-phase, or with a set phase difference (for example
90.degree.) preferably controlled according to the surface
state.
[0106] The more widely the injectors are distributed in different
areas of the tank or swimming pool, the better the wave types will
be, but the possibility of stimulating different modes once the
mode of wave is obtained is reduced.
[0107] To reduce the amount of pipe work the injectors are
preferably placed in the vicinity of the water overflow tank for
filtration.
[0108] The injectors can be of alternating types, i.e. permitting
at one point a surge from the bottom to the top, and at another
from the top to the bottom, or permitting at one point a surge to
the left and at another a surge to the right. It is equally
possible to combine the injectors functioning in opposing
directions, or substantially opposing directions. In the case of
injectors with vertical action in the opposing direction, it may
prove effective to place the injectors or an injector with
alternative action in an area at a corresponding height to that of
the amplitude of the wave, such that the injector is below the
level of the wave when a surge from the bottom towards the top and
above the level of the wave when there is a surge from top to
bottom.
[0109] The injectors can be put in place when the swimming pool is
constructed, the pipes carrying pressurised fluid being then
built-in or embedded. In one form of embodiment, the swimming pool
is equipped with a series of openings in the walls, these openings
being a covered end of a pipe that is to be linked to a water
supply system. The ends of these pipes are then closed with a cover
or a cap, when the swimming pool is not fitted with injectors. In
one form of embodiment, the openings are preferably equipped with a
system to gauge a state of the liquid surface of the pool, or with
a connection to send a parameter of the liquid surface state of the
pool to a control device.
[0110] The injector can be vertical or can be at a slight incline
to the vertical, for example forming an angle between -30.degree.
and +30.degree., preferably between -10.degree. and +10.degree.,
more particularly between -5.degree. and +5.degree.. The vertical
injector directs its jet preferably along the vertical wall of the
pool. The injectors can be of a fixed type (predetermined position)
or mobile (the direction of the jet can vary in a determined
directional field), even controlled (the direction of the jet can
be controlled according to the state of the wave). Control of the
direction of the jet could be programmed by an electronic system
(for example the system which controls the functioning of the
injectors). For this control, the injectors are mounted as mobile
fixtures in relation to a support, for example mounted rotationally
in relation to an axis, rotation being controlled by a motor, a
hydraulic or pneumatic system, etc.
[0111] The direction of the injector jets can be modified by the
movement of the liquid or according to the movement of liquid or
according to the parameter of the wave (frequency, wave length,
etc.) In one form of embodiment, the jet movement or at the very
least a part of the movement thereof would be generated by the
natural movement of the liquid in the tank or swimming pool. This
directional jet control would thus permit the movement of a wave to
be amplified whilst taking into account the natural movement of the
wave. The jet would in some way follow the natural movement of the
wave. In one form of embodiment, the jet is assembled rotationally
or pivotally in relation to a wall of the tank or swimming pool.
The rotational movement of the jet, in particular for jets having
at least substantially vertical component over the course of time,
can be operated by means or a motor and controlled according to the
water or liquid level in the vicinity of the jet, even perhaps
carried directly along by the movement of the liquid itself.
[0112] To avoid or limit waves in an area of the pool, it is
possible to plan for intermediary walls in the pool, or at least at
the surface of the pool.
[0113] These intermediary walls could themselves be an opportunity
to position injectors with their profiles and systems
integrated.
[0114] The sensors allow movements of water in the pool and in the
injectors to be measured (and thus thereafter to be controlled).
These are for example:
[0115] absolute or differential pressure sensors
[0116] which measure pressure at different locations in the pool
and more particularly:
[0117] near the areas where the injectors act
[0118] in areas affected by the injectors
[0119] in the area of the injector output
[0120] in areas where variations are to be created or avoided
[0121] in areas situated at multiples of half wave lengths
[0122] which measure pressure in the injector piping
[0123] at pump exits
[0124] before and after valves
[0125] before injection
[0126] water presence sensors working by capacitative, optical or
other means, allowing the measurement of variations, periods and
phases of water levels.
[0127] ultrasound sensors, either submerged or out of the water
that measure the distances between one reference and the surface of
the water.
[0128] and all other types of sensors judicious to this
application
[0129] The fluid supply, water in particular, in the injectors is
preferably controlled by means of one or more pump/s and/or
valves
[0130] The pressure supply will generally be a pump. However, one
might envisage, in particular when wave duration is relatively
brief, using energy from water under pressure available elsewhere.
This may prove advantageous in certain applications where a water
supply is required in any case.
[0131] This source of pressure could be modulated, either by
varying the speed of the pump motor, or by working with a permanent
pump and acting upon a valve that regulates the fluid input into
the injectors.
[0132] The system that varies the motor speed will use electronics
appropriate to the motor type, for example using a frequency
variator or voltage variator or any other electro-mechanical
system. It is to be noted that it is not necessary to completely
stop the pump and that, on the contrary, for good efficiency one
should always keep the motor at a minimum speed, only varying the
speed within a certain range.
[0133] (for example by supplying it with between 20 and 50 Hz for a
power pump working at a nominal 50 Hz at a nominal speed of 1450
revolutions per minute)
[0134] The velocity curve imposed on the pump will for example take
into account the characteristics of the pump, the need for variable
power at the optimal area of the liquid, the performance of the
injectors and the loss of hydraulic circuit function. Good results
may for example be obtained with sinusoidal curves whose offsets
and curves are judiciously chosen. Valid results are equally
obtained with a square, symmetrical or asymmetrical commands.
[0135] The system working with valves could for example use:
[0136] Proportional valves
[0137] ON-OFF valves
[0138] Multi-channel or distributor valves
[0139] Rotary valves with output adjusted according to position
[0140] Proportional valves allow precise and adjustable injection
control. They do not however offer optimal efficiency as over time
a part of the energy is lost, especially if several valves are used
and if they output alternately from different injectors, the sum of
the outputs being more or less constant.
[0141] ON-OFF valves are more straightforward, the required effect
is good, but the structure of the wave will be less pure as
interference waves are generated. This fault may be corrected with
the addition of additional valves, with well-chosen output and thus
one can work with ON-OFF valves (as in binary) almost in
proportional mode.
[0142] Multi-channel valves easily resolve the problem of
symmetrical and alternate transmission in two series of injectors
placed at opposite phase positions. They are, depending on their
construction, either proportional or ON-OFF
[0143] One can also have a series of off-phased injectors at an
angle different to 180.degree. and therefore the valves
redistributing the flow in multiple ways within the 360.degree. of
a period.
[0144] One might even envisage periods of longer than 360.degree.
and taking into account the frequency of beats inside the mixing
reservoir.
[0145] Rotary valves with outflow adjusted according to their
position allow water to be sent in a simple and optimal mechanical
way (once everything has been calculated, adjusted, tested, etc.)
in a cyclical fashion (in the desired wave rhythm) into the
different injector circuits. A pump working continuously and
therefore with optimal productivity sends water via this rotary
valve into different circuits, and they receive the water they
require at exactly the right moment and with exactly the right
curve (for example pure sinusoidal, sinusoidal with gain and
offset, square wave, etc).
[0146] These rotary valves are multi-channel valves that distribute
the output to one, two or more openings, in a repetitive fashion as
a function of their rotating speed. They can be ball, cylinder or
cone valves, like plug valves. As the valves may be submerged minor
leakage is not a problem, and they can therefore turn permanently
with practically no friction and therefore no wear.
[0147] With the valves, as with the variable speed of the motors,
one should not necessarily completely cut the inlet into the
injectors. In fact an injector which only receives perhaps a few
tenths of a percent of its nominal flow produces practically no
power, whereas to switch the entire stream of water back on from a
flow of zero would require more time and power.
[0148] Regulating the frequency, phase and amplitude of the wave
would best be controlled electronically.
[0149] Wave generation using these injectors, pumps, valves and
sensors borrows much from the WOW.RTM. wave ball commercialised by
the applicant, in the knowledge that the use of the concept of an
injector, which is in some ways an output-multiplier/pressure
divider, allows the "fixed" injection point to be rendered
relatively undetectable to the relative speed of the water. In
fact, the speed at which water is output from the injector is an
order of magnitude higher than the fastest water flow in the area
of the effective surge after the multiplication effect.
[0150] In the system as per the invention, advantage can be taken
of the wave resonance effect, as well as all the regulation and the
optical, sonic pressure (etc) sensors that can monitor wave
movements as well as the injector commands and the result of the
injectors.
[0151] One could even envisage measuring the pressure of the liquid
in the injector area, by measuring of the counter pressure of the
injector itself.
[0152] The system as per the invention also offers potentially
beneficial side effects: massages, bubbles, aeration, oxygenation,
degassing of a liquid medium, etc.
[0153] The injectors can also be placed in carefully selected areas
away from the edges, for example in the middle of the pool or close
to the antinode of waves, at the point where bathers can, in
addition to the waves, benefit from the effects of jets and
bubbles.
[0154] The starting blocks (diving boards) for public pools can
easily become wave generators with power injectors from above
without any interaction with the pool reservoir (except for the
water supply, which can be via the filtration circuit).
[0155] Integrated filtration blocks can serve as wave generators
and can also include the bubble and diving board aspects.
[0156] It is clear that one or more of the injectors or a series of
injectors can be used to create one or more fountains or jets of
liquid, which rise at least partially above the surface of the
liquid.
[0157] It is equally clear that the pool can be a pool with one or
more lateral walls, defining a closed or substantially closed
volume.
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