U.S. patent application number 12/711742 was filed with the patent office on 2010-08-19 for toilet flusher with the time-offset release of two substances.
Invention is credited to Ralph Butter-Jentsch, Matthias Lueken, Hans-Georg Muhlhausen, Frank Pessel.
Application Number | 20100205731 12/711742 |
Document ID | / |
Family ID | 39540550 |
Filed Date | 2010-08-19 |
United States Patent
Application |
20100205731 |
Kind Code |
A1 |
Muhlhausen; Hans-Georg ; et
al. |
August 19, 2010 |
TOILET FLUSHER WITH THE TIME-OFFSET RELEASE OF TWO SUBSTANCES
Abstract
Toilet flusher for adding at least two different substance
preparations to a toilet bowl or into the surroundings of a toilet
bowl, comprising a first container containing a first preparation
and at least one second container containing a second preparation,
wherein the toilet flusher comprises one or more means that release
two different substance preparations at consecutive time points
t.sub.1 and t.sub.2, wherein at least one means for releasing a
substance preparation is configured such that a release of at least
one substance preparation in the interior of the toilet bowl is
caused.
Inventors: |
Muhlhausen; Hans-Georg;
(Dusseldorf, DE) ; Pessel; Frank; (Dusseldorf,
DE) ; Butter-Jentsch; Ralph; (Langenfeld, DE)
; Lueken; Matthias; (Dusseldorf, DE) |
Correspondence
Address: |
Henkel Corporation
10 Finderne Avenue
Bridgewater
NJ
08807
US
|
Family ID: |
39540550 |
Appl. No.: |
12/711742 |
Filed: |
February 24, 2010 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/EP2008/054196 |
Apr 8, 2008 |
|
|
|
12711742 |
|
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Current U.S.
Class: |
4/223 |
Current CPC
Class: |
B05B 9/0811 20130101;
B05B 12/1418 20130101; E03D 9/032 20130101; E03D 9/005 20130101;
E03D 9/007 20130101; B05B 12/1409 20130101; B05B 9/0861 20130101;
B05B 12/122 20130101 |
Class at
Publication: |
4/223 |
International
Class: |
E03D 9/02 20060101
E03D009/02 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 24, 2007 |
DE |
10 2007 040 327.7 |
Claims
1. Toilet freshener for introducing at least two different active
substance preparations into a toilet bowl and/or into the toilet
bowl's surrounding environment comprising: a power source, a
control unit, a sensor unit, a first container containing a first
preparation, and at least one second container containing a second
composition, wherein the power source, control unit, first
container and at least the second container interact with a pump
and/or a release element so that in at least two successive points
in time t.sub.1 and t.sub.2 at least two different active substance
preparations are released, wherein at least one active substance
preparation is at least released into the interior of the toilet
bowl.
2. Toilet freshener according to claim 1, wherein the control unit
is a programmable microcontroller.
3. Toilet freshener according to claim 2, further comprising a
plurality of dispensing programs stored in the microcontroller, the
programs being selectable and executable based on the container
coupled to the dispenser.
4. Toilet freshener according to claim 1, wherein the pump and/or
the release element and at least the first preparation are
configured so that foam is formed on release of the preparation
into the surrounding environment.
5. Toilet freshener according to claim 1, wherein the release
element is arranged in movable manner on the toilet freshener in
such a manner that the user can orient the spray cone producible by
the release element onto a desired application field.
6. Method for introducing at least two different active substance
preparations into a toilet bowl or into the toilet bowl's
surrounding environment, wherein in at least two successive points
in time t.sub.1 and t.sub.2 at least two different active substance
preparations are released, at least one active substance
preparation being introduced into the interior of a toilet
bowl.
7. Method according to claim 6, wherein the first preparation is a
cleaning agent and at least one second preparation is a
fragrance.
8. Method according to claim 6, wherein the first preparation is a
first cleaning agent and at least one second preparation is a
second cleaning agent.
9. Method according to claim 6, wherein the first preparation is a
first fragrance and at least one second preparation is a second
fragrance.
10. Method according to claim 6, wherein a cleaning agent is
released at time t.sub.1 and a fragrance is released at time
t.sub.2.
11. Method according to claim 6, wherein a fragrance is released at
time t.sub.1 and a cleaning agent is released at time t.sub.2.
12. Method according to claim 6, wherein time t.sub.1 is selected
to be before toilet flushing is initiated and time t.sub.2 is
selected to be after toilet flushing is initiated.
13. Method according to claim 6, wherein time t.sub.1 is selected
to be before toilet flushing is initiated and time t.sub.2 is
selected to be during the interflushing interval.
14. Method according to claim 6, wherein time t.sub.1 is selected
to be during the interflushing interval and time t.sub.2 is
selected to be after toilet flushing is initiated.
15. Method according to claim 6, wherein at least one second active
substance preparation is released into the interior of a toilet
bowl.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation of International
Patent Application No. PCT/EP2008/054196 filed 8 Apr. 2008, which
claims priority to German Patent Application No. 10 2007 040 327.7
filed 24 Aug. 2007, both of which are incorporated herein by
reference.
[0002] The present invention relates to a toilet freshener and a
method for time-offset release of preparations in or on a toilet
bowl.
[0003] Accurate dispensing of flowable or pourable compositions is
relevant in a large number of fields of application.
[0004] Domestically, dispensing of flowable substances is
increasing in importance, based primarily on exact, controlled
dispensing of active substances so that the environment is
protected by conservation of resources and prevention of incorrect
or over-dispensing, while efficiency of the active substances
dispensed in this way is optimized.
[0005] Dispensing of cleaning and fragrancing compositions in the
toilet area is currently performed primarily by "toilet
fresheners". These are single- or multi-chamber containers which
are hung in the toilet bowl so that an active substance is released
from the toilet freshener into the toilet bowl during the flushing
process of flushing the toilet bowl with water.
[0006] Such devices are known, for example, from EP0828902 or
DE10113036.
[0007] Still, it is desirable to release active substance not only
after actuation of flushing, but at other times as well. For
example, it would be advantageous to dispense fragrances or foaming
agents into the toilet bowl immediately before the toilet is used,
in order to counteract the possible release of odors, often
regarded as unpleasant, from human excreted metabolites during use
of the toilet.
[0008] Further, the above-described dispensing devices often have
large structural volumes, which is aesthetically displeasing and
can also create functional problems, for example, due to the usable
space in a toilet bowl being reduced by the dispensing devices
projecting into the toilet orifice.
[0009] Toilet fresheners are described in, for example, EP1587992,
wherein multiple flowable active substances are stored in different
chambers. Typically, preparations which cannot be stored together
(e.g., strong bleaching agents and perfume) are stored in such
two-chamber systems. However, today's toilet fresheners only permit
simultaneous release of these active substances, which may result
in a cleaning performance and/or fragrance action that is not
optimized.
[0010] Toilet fresheners are also described in the art that, in
addition to releasing active substance into the flush water of a
toilet bowl, provide permanent, diffuse fragrance release into the
surrounding environment of the toilet freshener. However, permanent
fragrancing is often deemed annoying or even overpowering by
users.
[0011] In addition, the time in which the toilet bowl surface is
exposed to a released active substance during a flushing process is
comparatively short, requiring high concentrations or quantities of
active substances to be released into the flush water for effective
wetting or cleaning of the surface. It is therefore desirable to
increase the time in which the toilet bowl surface is exposed to
the released active substances.
[0012] It is therefore an object of the invention to provide a
method and a device which provides optimized cleaning performance
and/or fragrancing action in or on a toilet bowl.
[0013] This is achieved by a device having a power source, control
unit, sensor unit, a first container containing a first
preparation, and at least one second container containing a second
composition, wherein the power source, control unit, first
container and at least the second container interact with a pump
and/or a release element so that in at least two successive points
in time t.sub.1 and t.sub.2 at least two different active substance
preparations are released, wherein at least one active substance
preparation is at least released into the interior of the toilet
bowl. The present invention further provides a method for
introducing at least two different active substance preparations
into a toilet bowl or into the toilet bowl's surrounding
environment, wherein in at least two successive points in time
t.sub.1 and t.sub.2 at least two different active substance
preparations are released, at least one active substance
preparation being introduced into the interior of a toilet
bowl.
[0014] The toilet freshener according to the invention consists of
various components which may in turn be combined into assemblies.
The components of the toilet freshener comprise at least one pump,
a release element, a control unit, a sensor unit, a power source, a
container, a fastening means and a preparation. In a preferred
embodiment of the invention the components pump, control unit,
sensor unit and power source may be combined into a "dispenser"
assembly. The components and assemblies are described below.
Dispenser --
[0015] The dispenser can include the power source needed to operate
the toilet freshener, its control unit, sensor unit and at least
one pump. Preferably, the dispenser includes a housing for
protection from water splashing into the interior of the dispenser,
as may occur when the toilet freshener is used in a toilet
bowl.
[0016] It is also preferred to have the dispenser arranged on the
outer rim of the toilet bowl, further enabling protection from
exposure to water splashes as well as convenient operation of the
dispenser. In addition, by having a dispenser that does not project
into the interior of the toilet, the useful cross-sectional area of
the toilet bowl is not reduced.
[0017] Since, depending on their intended purpose, dispensable
preparations can have a pH value of from 2 to 12, any components of
the toilet freshener which contacts these preparations should have
appropriate acid and/or alkali resistance. In addition, suitable
material selection should ensure that these components are as far
as possible chemically inert (e.g., in relation to nonionic
surfactants, enzymes and/or fragrances).
[0018] It is particularly advantageous for electrical components of
the toilet freshener such as the power source, control unit and
sensor unit, to be encapsulated or housed separately or together so
that the dispenser is substantially water-tight (i.e., the
dispenser is functional even when completely surrounded by liquid).
Examples of useful encapsulation materials include multicomponent
epoxide and acrylate encapsulation compounds such as methacrylate
esters, urethane meth- and cyanoacrylates or two-component
materials comprising polyurethanes, silicones, epoxy resins.
[0019] A significant advantage of the invention is the separation
of the toilet freshener into a dispenser and a container coupled
with the dispenser, whereby the toilet freshener is flexible and
adapted for the widest possible range of applications.
Pump --
[0020] For the present application, a pump is a fluid power machine
for moving or delivering a fluid in particular small quantities by
converting mechanical drive power into flow power.
[0021] Fluids are understood below to be liquids and gases, and
mixtures thereof and with solids.
[0022] Pumps include positive-displacement pumps, oscillatory
pumps, diaphragm pumps, piston pumps, rotary pumps, dynamic pumps,
centrifugal pumps, electrohydrodynamic pumps, electroosmotic pumps,
magnetohydrodynamic pumps, surface acoustic wave pumps, capillary
pumps, electrowetting pumps, thermocapillary pumps.
[0023] The pump is either connected directly to the power source or
the control unit is interposed therebetween.
[0024] In a further embodiment of the invention, the release of at
least one preparation can occur merely by gravity without use of a
pump. Release of preparation from the container into the
surrounding environment can be controlled in this configuration,
for example, by a valve which opens to release the preparation and
closes to prevent release. The valve can be controllable directly
by the power source or by the control unit connected
therebetween.
[0025] The pump, sensor and control unit are advantageously
configured so that a defined amount of active substance preparation
is released into the toilet bowl irrespective of the arrangement of
the toilet freshener in or on the toilet bowl and/or of the amount
of flush water to which the toilet freshener is exposed.
[0026] The pump likewise makes it possible for at least two
different, defined amounts of at least one active substance
preparation to be released. A significant advantage of this
embodiment of the invention is that active substances are dispensed
into the toilet bowl in a manner appropriate to requirements,
thereby achieving active substance use which is more effective and
better conserves resources.
[0027] In a further development of the invention, the pump is
configured so that it is able to release an active substance
preparation with a viscosity of <5000 mPas.
Micropump --
[0028] Delivery rate of a micropump amounts conventionally to from
50 nl to 100 ml per minute, preferably from 250 nl to 30 ml per
minute, particularly preferably from 500 nl to 5 ml per minute.
[0029] Preferably the micropump has a structural volume of about 5
cm.sup.3 or less, particularly preferably of about 3 cm.sup.3 or
less, particularly preferably of about 2 cm.sup.3 or less.
[0030] The specific delivery rate of a micropump (calculated from
the ratio of the delivery rate to the structural volume of a
micropump) is typically about 500 [l/min] or less. The specific
delivery rate preferably lies from 1 to 300, particularly
preferably from 1.5 to 200, particularly preferably from 2 to 150,
very particularly preferred from 2.5 to 100 l/min.
Diaphragm Pumps --
[0031] Diaphragm pumps are particularly useful for dispensing
cleaning and active substance preparations as well as
fragrances.
[0032] Diaphragm pumps typically include an inlet valve and an
outlet valve respectively leading into and out of a pump chamber,
formed in part from a pump diaphragm, and an actuator.
[0033] When the inlet valve is closed, the actuator causes
compression of the pump chamber by acting mechanically on the pump
diaphragm, resulting in the fluid located in the pump chamber being
delivered out of the pump chamber via the open outlet valve.
[0034] Once the discharge process is complete, the outlet valve is
closed and decompression of the pump chamber is effected by the
actuator, resulting in fluid being drawn into the pump chamber via
the now open inlet valve.
[0035] By suitable configuration and/or control of the valves and
of the actuator, delivery direction of the micropump can be
influenced or reversed.
[0036] The diaphragm pump actuator can be electromotive,
piezoceramic, bimetallic, memory metallic, pneumatic, peristaltic,
electrostatic, electromagnetic or thermal drive units.
[0037] The valves can be active or passive valves. Passive valves
include clack valves, diaphragm valves or no-moving-parts
valves.
[0038] Depending on the field of application, pressure-side release
of the preparation from the dispensing device can occur dropwise,
as a jet or spray, by diffusion or by vaporization.
[0039] For preparations having a tendency to form deposits over
extended storage, it may be advantageous to arrange the container
housing the preparation on the pressure side of the pump. In this
configuration, only a fluid containing no deposit-forming
substances is delivered through the pump. In this case, it is
particularly advantageous to use air as the fluid.
[0040] The fluid is pumped into the container under pressure. The
container has a pressure equalizing valve which, when a defined
pressure in the container is exceeded, allows the product to flow
out of the container.
[0041] This allows use of the dispenser for a variety of
preparations without jeopardizing the functionality of the pump due
to possible deposits or reactions between two preparations.
Release Elements --
[0042] Release elements are any kind of device suitable for
releasing an active substance into the surrounding environment of
the dispensing device.
[0043] Release elements can include nozzles, spray heads, droplet
dispensers, foam spray heads, piezo elements, porous elements, wick
systems, capillary systems, nebulizers, ultrasound nebulizers,
ionization nebulizers etc.
[0044] Nozzles, spray heads, droplet dispensers, foam spray heads,
piezo elements and the like are particularly suitable for releasing
active substances into the toilet or onto the interior surfaces of
the toilet bowl.
[0045] Nozzles, atomizers, spray heads, piezo elements, sintered
plates, porous elements, wick systems and the like are particularly
suitable for active substance preparation release into the air.
[0046] Release elements can have the same or different spray cone
shapes when releasing the preparations. Accordingly, it is possible
for one release element to produce a jet with a somewhat narrow or
directed application area, while another release element produces a
broad application field. Obviously, various combinations of the
most varied spray cone shapes are conceivable.
[0047] In particular, the release element can be movably arranged
on the toilet freshener in a manner that allows the user to orient
the spray cone from the release element onto a desired application
field. The release element can also permit adjustment of the spray
cone shape.
[0048] The release element can also provide for electrostatic
charging of active substance droplets, thereby improving the
wetting, adhesion and/or distribution of the active substance on a
surface and/or in the air.
[0049] The release element can also be constructed as a fan
configured either to improve air quality by drawing in malodors or
optimize active substance distribution in or on the toilet
bowl.
[0050] Release elements can further be configured so that one or
more active substances are released in different directions from
one another. The following table provides a non-exhaustive list of
some possible configurations regarding the direction of
release.
TABLE-US-00001 Direction of release A Direction of release B
Release of fragrance into Release of fragrance into toilet bowl
surrounding environment Release of cleaning agent Release of
cleaning agent under into toilet bowl the toilet rim/during
flushing or outside the flushing process Release of cleaning agent
Release of fragrance into into toilet bowl surrounding
environment
[0051] Further desired combination of the configurations shown in
the above table are also possible.
[0052] It is advantageous to arrange the release element in movable
manner on the clip of the toilet freshener. Doing so allows the
user to orient the release element and spray cone of the
preparation in order to wet a defined application field in or on
the toilet with the preparation.
[0053] The release element(s) is/are advantageously configured so
that, regardless of the location of the toilet freshener on the
toilet bowl, a defined amount of at least one active substance
preparation is released in directed and defined manner into the
interior of a toilet bowl. Advantages of such a development include
more specific exposure of surfaces of the toilet bowl to one or
more active substances, as well as the ability to treat different
surfaces with different active substances. For example, considering
a German style flat-pan toilet, the pan portion can be wetted with
an active substance for reducing adhesions, while an active
substance for reducing lime deposits can be applied onto the
funnel-shaped walls extending from the pan to the rim of the
toilet.
[0054] In a further, preferred embodiment of the invention the
control unit generates a control signal for releasing active
substance preparation when flushing is initiated and a control
signal for terminating active substance release once flush water
has stopped flowing through the toilet bowl.
[0055] In a further development of the toilet freshener, the first
amount released and at least the second amount released originate
from identical or different active substance preparations.
[0056] According to a further, preferred embodiment, the first
amount released and at least the second amount released are
released at different points in time.
[0057] In a further development of the invention, the release
element and at least the first preparation are configured so that
foam is formed when the preparation is released into the
surrounding environment.
[0058] In a further, alternative development of the invention, the
pump, the release element and at least the first preparation are
configured so that foam is formed when the preparation is released
into the surrounding environment.
[0059] Foaming provides a variety of advantages. For example, foam
can effectively trap and minimize malodors due to its pore and cell
structure. Also, foam can be applied onto the surface of the toilet
bowl as an "anti-caking" coating in order to reduce adhesions of
excreted metabolites to these surfaces.
[0060] It is therefore advantageous for the release element to take
the form of a foam spray head, and for the preparation to have a
viscosity of less than about 3000 mPas, so that a maximally stable,
effectively adhering and fine-pored foam can be formed.
Control Unit --
[0061] A control unit in the present application is a device
suitable for influencing the transport of material, energy and/or
information. To this end, the control unit acts on transducers with
information which it processes for achieving the control
objective.
[0062] Transducers can include, for example, pumps and/or
valves.
[0063] In a preferred development of the invention the toilet
freshener does not make use of any mechanical control elements for
product release, enabling the toilet freshener to be miniaturized
so that it may also be used in applications in which the size of
the toilet freshener is critical.
[0064] The control unit can include a programmable microprocessor.
In a particularly preferred embodiment of the invention, a
plurality of dispensing programs are stored in the microprocessor
for selection and execution depending on the container coupled to
the toilet freshener. It is also possible for the dispensing
programs to be manually invoked by the user.
[0065] The control unit is preferably arranged on the outwardly
facing side of the toilet bowl, allowing it to be operated by the
user, in particular, when the user is sitting on the toilet.
[0066] In a particularly preferred embodiment, the control unit has
a dispensing program for introducing at least two different active
substance preparations into a toilet bowl or into the toilet bowl's
surrounding environment, wherein in at least two successive points
in time t.sub.1 and t.sub.2 at least two different active substance
preparations are released, with at least one active substance
preparation introduced into the interior of a toilet bowl.
[0067] Such a dispensing program allows optimized cleaning
performance due to control of possible chemical reactions based on
appropriately time-offset release of the corresponding preparation
or preparations, some examples of which are listed in the following
table.
TABLE-US-00002 t.sub.1 t.sub.2 Advantage Cleaning product Fragrance
in Optimized fragrance development, since fragrance is in toilet
bowl toilet bowl after released into the toilet bowl after flushing
and is during flushing flushing consequently not flushed away with
the flush water. process Fragrance is not "decomposed" by cleaning
preparation. Fragrance in Cleaning product Optimized fragrance
development, since fragrance is toilet bowl in toilet bowl released
into the toilet bowl before flushing and is immediately during
flushing consequently not flushed away with the flush water. before
use process Fragrance is not "decomposed" by cleaning preparation.
Cleaning product Cleaning product Cleaning product A may prevent
adhesions in the toilet A in toilet bowl B in toilet bowl bowl by a
protective film of cleaning product A being immediately during
flushing applied in the toilet bowl immediately before the toilet
is before use process used, which protective film is then flushed
back off the toilet surface by cleaning product B during the
flushing process.
[0068] Another advantage is that a controlled release of one or
more different fragrances can be implemented, thereby at least
reducing dependence on the sense of smell. This can be accomplished
by cyclic and pulsed release of fragrance as described in the prior
art. Furthermore, dependence on smell can also be reduced by
releasing different fragrances in succession.
[0069] The toilet freshener can also dispense a defoamer into the
toilet bowl before or during the flushing process. Excessive
foaming before or during the flushing process often causes toilet
paper to float on this foam so that it is not properly flushed
away, but instead floats in the toilet bowl after completion of the
flushing process. Consumers often consider this unappealing. By
dispensing the defoamer before or during the flushing process,
excessive foaming can be prevented, ensuring that the toilet paper
is reliably flushed away. In addition or as an alternative to the
defoamer, cellulose-dissolving substances may also be added and
dispensed.
[0070] The control unit can be constructed so that parameters in
the dispensing programs are adjustable or settable. For example,
sensor threshold values may accordingly be set during
preconfiguration of the toilet freshener or also by the user during
use in order to initiate active substance release at a specific
sensor threshold value. Setting one or more parameters can be
achieved by an appropriately configured input device on the toilet
freshener. Doing so allows control of the toilet freshener to be
further optimized and adapted to a specific instance of use.
Sensor Unit --
[0071] The sensor unit can include one or more active and/or
passive sensors for the qualitative and/or quantitative detection
of mechanical, electrical, physical and/or chemical variables which
are forwarded to the control unit as control signals.
[0072] In particular, sensors of the sensor unit include timers,
infrared sensors, brightness sensors, temperature sensors, motion
sensors, strain sensors, rotational speed sensors, proximity
sensors, flow sensors, color sensors, gas sensors, vibration
sensors, pressure sensors, conductivity sensors, turbidity sensors,
instantaneous acoustic pressure sensors, "lab-on-a-chip" sensors,
force sensors, acceleration sensors, inclination sensors, pH
sensors, moisture sensors, magnetic field sensors, RFID sensors,
magnetic field sensors, Hall sensors, biochips, odor sensors,
hydrogen sulfide sensors and/or MEMS sensors.
[0073] In its simplest embodiment, the sensor unit can be in the
form of a toggle, pressure or momentary-contact switch.
[0074] For preparations whose viscosity fluctuates greatly as a
function of temperature, it is advantageous to provide flow sensors
in the dispensing device for monitoring the volume or mass of the
dispensed preparations. Suitable flow sensors may be selected from
the group of diaphragm flow sensors, magnetic-inductive flow
meters, mass flow metering using the Coriolis method, eddy flow
metering, ultrasound flow metering, rotameter metering, annular
piston flow metering, thermal mass flow metering or differential
pressure flow metering.
[0075] It is also possible to store a viscosity curve as a function
of temperature for at least one preparation to be saved in the
control unit, with dispensing being adjusted by the control unit in
accordance with the temperature and thus the viscosity of the
preparation.
[0076] In a further development of the invention, a device is
provided for direct determination of the viscosity of the
preparation.
[0077] The alternatives mentioned above for determining dispensing
amount and/or viscosity of a preparation generate a control signal
is processed by the control unit for controlling a pump, thereby
inducing substantially constant dispensing of a preparation.
[0078] In another preferred embodiment of the invention, the sensor
is configured so that detection of a flushing process is achieved
without significant influence on flow conditions in a toilet bowl.
For example, ultrasound sensors can be used for this purpose.
[0079] Furthermore, it is advantageous to have a dispensing process
in which a predetermined amount of a preparation is released, for
example, over a time of about 20 seconds or less, preferably about
10 seconds or less, particularly preferably about 5 seconds or
less. By providing the shortest possible dispensing period in which
a preparation is released into the surrounding environment, the
dispenser can be available for the next dispensing period and also
ensure effective release of preparation, even if a toilet is in
continual use.
Power Source --
[0080] For the purposes of the present application, a power source
refers to a component of the dispensing device capable of providing
power suitable for autonomous operation of the dispensing
device.
[0081] The power source preferably provides electrical power. The
power source can be, for example, a battery, a mains power supply,
solar cells or the like.
[0082] It is also possible to wirelessly transmit the electrical
power required for operating the dispenser from an appropriate
transmitter to a corresponding receiver in the dispenser.
[0083] It is particularly advantageous to make the power source
replaceable (e.g., in the form of a replaceable battery).
[0084] However, it is also possible for the power source to be a
mechanical power source such as a dynamo, which converts mechanical
or fluidic energy into electrical power. This can then be stored in
suitable storage elements such as a capacitor or storage
battery.
Container --
[0085] For the purposes of the present application, a container
refers to a packaging container suitable for enclosing or holding
preparations, and which can be coupled to the dispenser for release
of the preparation.
[0086] A particularly preferred arrangement is one in which two
containers are provided, preferably separate from one another, each
containing an active substance fluid. However, there can also be a
plurality of storage containers for a plurality of active substance
fluids. The storage containers can be separate from one another in
order to prevent premature mixing of the active substance fluids.
They can be physically separate containers or separate compartments
in a single container body.
[0087] The volume ratio of the structural volume of the dispenser
and the capacity of the container preferably amounts to <1,
particularly preferably <0.1, particularly preferably <0.05.
This ensures that, for a predetermined overall structural volume of
dispenser and container, the dominant proportion of the structural
volume is occupied by the container and the preparation contained
therein.
[0088] The container can have a capacity of <5000 ml, in
particular <1000 ml, preferably <500 ml, particularly
preferably <250 ml, very particularly preferably <50 ml.
[0089] The invention is suitable for dimensionally stable
containers such as pots, tins, capsules, cartridges, bottles,
canisters, cans, cartons, drums or tubes, but may also be used for
flexible containers such as pouches or bags, in particular if they
are used according to the bag-in-bottle principle.
[0090] A container can include a plurality of chambers finable with
different compositions. It is also possible for a plurality of
containers to be combined into a unit (e.g., into a cartridge).
[0091] The following table provides examples of possible
combinations of containers or chambers with the corresponding
preparations for some applications.
TABLE-US-00003 Container A Container B Container C Cleaning agent
Fragrance Cleaning agent A Cleaning agent B Cleaning agent A
Cleaning agent B Fragrance
[0092] In a preferred embodiment of the invention, the container
has an RFID label containing at least information about the
container's contents and which is readable by the sensor unit.
[0093] This information can be used to select a dispensing program
stored in the control unit. By doing so, it can be ensured that the
ideal dispensing program is always used for a specific preparation.
It is also possible that, in the absence of an RFID label or when
an RFID label has an incorrect or defective ID, the dispensing
device does not dispense, but instead an optical or acoustic signal
is produced notifying the user of the error.
[0094] In order to prevent misuse of the containers, the containers
can also have structural elements that interact with corresponding
elements of the dispenser like a key in a lock, so that only
containers of a particular type are coupled to the dispenser. This
embodiment makes it possible for information about the container
coupled to the dispenser to be transferred to the control unit so
that the dispensing device can be controlled in a manner based on
the contents of the corresponding container.
[0095] In a further development of the invention, the container can
be pressurized. This is useful when the preparation is sprayed or
released without requiring a pump in between. Here, release of the
preparation can be controlled or regulated, for example, by a
control valve in active connection with the control unit. This
embodiment has the additional advantage that no power need be
provided by the power source to transport the preparation, allowing
the power source to be made smaller or have a longer anticipated
life.
Fastener --
[0096] The toilet freshener can also include fasteners for fixing
the toilet freshener to the toilet bowl. Fasteners include suction
cups, adhesive tape, clips or the like.
[0097] Alternatively, the toilet freshener can be fastened to the
toilet cistern, the toilet seat or to the toilet lid. Fasteners
known in the art can be used for this purpose.
Preparations --
[0098] Preparations for the purpose of these applications are
compositions containing at least one substance from the group of
cleaning agents and/or fragrances.
[0099] According to a further, preferred development of the
invention, the preparations include substances for modifying
surfaces, in particular ceramic surfaces.
[0100] Preparations suitable according to the invention include,
for example, fragrance phases, in particular perfumed fragrance
phases. Such fragrance phases conventionally contain at least one
fragrance, preferably perfume oil, at least one surfactant or an
emulsifier and water and optionally further ingredients such as
preservatives, thickeners, complexing agents, dyes, further
surfactants, or emulsifiers, stabilizers, limescale removers
etc.
[0101] Bleach phase preparations, in particular chlorine-containing
bleach phases, preferably hypochlorite-based bleach phases, are
likewise suitable as preparations according to the invention,
wherein, in addition to the actual bleaching agent and water, the
bleach phases can contain further ingredients such as thickeners,
surfactants or emulsifiers, neutralizing agents, dyes, fragrances,
etc.
[0102] Further preparations suitable according to the invention
include limescale removing active substance phases, preferably
acidic limescale removing active substance phases. In addition to
the actual limescale remover (preferably comprising an organic or
inorganic acid) and water, such limescale removing active substance
phases can optionally contain further ingredients such as
surfactants or emulsifiers, thickeners, fragrances, preservatives,
etc.
[0103] It is also possible to use highly concentrated surfactant
phases, or "foam boosters" as they are known, as preparations. In
addition to the surfactants, such highly concentrated surfactant
phases can also contain other conventional ingredients. Foam
boosters are advantageous for pretreating the toilet bowl with a
carpet of foam in order, for example, to prevent or reduce adhesion
of excreted metabolites to the surface of the toilet and/or to trap
malodors.
[0104] Preparations having an antibacterial and/or fungicidal
and/or antiviral active substance phase are likewise suitable,
wherein, in addition to the antibacterial and/or fungicidal and/or
antiviral active substance and water, the active substance phase
can also contain other ingredients such as surfactants or
emulsifiers, thickeners, fragrances, preservatives, etc.
[0105] It is also possible for the preparations to contain
enzyme-containing active substance phases. In addition to enzyme(s)
and water, such enzyme-containing active substance phases can
optionally contain further ingredients such as surfactants or
emulsifiers, thickeners, fragrances, preservatives, etc.
[0106] It is likewise possible for the preparations used according
to the invention to be absorbent, particularly odor-absorbing
active substance phases. In addition to the absorbent, in
particular odor absorbent, and water, these phases can also contain
other ingredients such as surfactants or emulsifiers, thickeners,
fragrances, preservatives etc.
[0107] According to one particular embodiment, the toilet freshener
according to the invention allows the use of different combinations
of different preparations in the storage containers, wherein one of
the storage containers contains a fragrance phase as defined
above.
[0108] Examples of useful preparation combinations include a
perfumed fragrance phase combined with chlorine bleach (which are
not stable when stored together), perfumed fragrance phase with
highly concentrated surfactant phase (foam booster), fragrance
phase with limescale removing, acidic active substance phase,
fragrance phase with antibacterial active substance phase, various
acid systems, fragrance phase combined with enzyme-containing
active substance phase, perfumed acid phase combined with
water-coloring phase, fragrance phase with odor-absorbing phase,
perfumed acid phase with active oxygen, perfumed acid phase with
active substance phase, polyacrylate-thickened etc.
[0109] Of particular interest are high-viscosity to gel-like active
substance fluids having viscosities of a few thousand mPas, in
particular from about 200 to about 5000 mPas, preferably about 500
to about 3500 mPas (measured with RotoVisko LVTV II, spindle 31, 5
rpm, 20.degree. C.).
[0110] In a further, preferred embodiment of the invention, the
preparations have a viscosity of about 2000 mPas or less, in
particular about 1000 mPas or less (measured with RotoVisko LVTV
II, spindle 31, 5 rpm, 20.degree. C.). These low-viscosity to
watery preparations are particularly suitable if the preparation is
sprayed into or onto the toilet bowl.
[0111] Using low-viscosity active substance preparations with
toilet fresheners according to the invention allows for
substantially faster and more accurate dispensing, as well as
dispensing with the use of thickening systems. Furthermore, active
substance systems which can only be prepared in low viscosities can
be used, for example, based on chlorine, HCl, etc.
[0112] According to a further embodiment of the invention, the
preparation can be pressurized. This is advantageous when the
preparation is sprayed or released without requiring a pump in
between. Here, release of the preparation can be controlled or
regulated by a control valve actively connected to the control
unit. This embodiment is further advantageous in that no power is
required from the power source for transporting the preparation,
allowing the power source to be made smaller or have a longer
anticipated life.
BRIEF DESCRIPTION OF THE DRAWINGS
[0113] FIG. 1 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a
preparation container on the suction side of the pump.
[0114] FIG. 2 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a
preparation container on the pressure side of the pump.
[0115] FIG. 3 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a
two-chamber preparation container on the suction side of the
pump.
[0116] FIG. 4 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a passive
valve-controlled two-chamber preparation container on the suction
side of the pump.
[0117] FIG. 4A is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with an active
valve-controlled two-chamber preparation container on the suction
side of the pump.
[0118] FIG. 5 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with two
pump-connected preparation containers.
[0119] FIG. 6 is a flow chart illustrating one method of
controlling a toilet freshener according to the present invention
with a pump.
[0120] FIG. 7 is a flow chart illustrating one method of
controlling a toilet freshener according to the present invention
with a pump and multi-chamber preparation container.
[0121] FIG. 8 is a flow chart illustrating one method of
controlling a toilet freshener according to the present invention
with a plurality of pumps and multi-chamber preparation
container.
[0122] FIG. 9 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with an RFID
label on a preparation container.
[0123] FIG. 10 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a
removable refill container.
[0124] FIG. 11 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a refill
container fixed to a dispenser.
[0125] FIG. 12 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a battery
built into the refill container.
[0126] FIG. 13 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a
two-chamber refill container and two pumps.
[0127] FIG. 14 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a
two-chamber refill container, pump, and control valve.
[0128] FIG. 15 is a perspective view of one embodiment of a toilet
freshener according to the present invention with an extendible
clip.
[0129] FIG. 16 is a perspective view of one embodiment of a toilet
freshener according to the present invention with a removable
container and wick system.
[0130] FIG. 17 is a side view of one embodiment of a toilet
freshener according to the present invention with a release element
arranged at the end of the clip.
[0131] FIG. 18 is a top view of one embodiment of a toilet
freshener according to the present invention with a release element
arranged at the end of the clip, with the freshener attached to a
toilet bowl.
[0132] FIG. 19 is a perspective view of one embodiment of a toilet
freshener according to the present invention with individually
replaceable containers.
[0133] FIG. 20 is a perspective view of one embodiment of a release
element according to the present invention with integrated sensor
unit and two release nozzles.
[0134] FIG. 21 is a perspective view of one embodiment of a release
element according to the present invention with integrated sensor
unit, two release nozzles and two spray cones.
[0135] FIG. 22 is a perspective view of one embodiment of a toilet
freshener according to the present invention with release element
and two spray cones, looking down onto a toilet bowl.
[0136] FIG. 23 is a side view of one embodiment of a toilet
freshener according to the present invention with release element
arranged under the toilet rim and two differently oriented spray
cones.
[0137] FIG. 24 is a side view of one embodiment of a toilet
freshener according to the present invention with the release
element arranged under the toilet rim and a spray cone directed
under the rim of the toilet.
[0138] FIG. 25 is a perspective view of one embodiment of a toilet
freshener according to the present invention with two individually
replaceable containers and a viewing flap in closed and open
positions.
[0139] FIG. 1 shows a toilet freshener 1 according to the invention
consisting of a dispenser 2 and a container 9 connected to the
dispenser 2 and containing a preparation 10.
[0140] The dispenser 2 includes a power source 3, control unit 4,
sensor unit 5 and pump 6, wherein all components are preferably
incorporated in a housing. The pump 6 is connected to the power
source 3 via the control unit 4. The control unit 4 is in turn
connected with the sensor unit 5, which directs the control signals
for controlling the pump 6 to the control unit 4.
[0141] The pump 6 has a pressure line 7 and a suction line 8, with
the suction line 8 connected to the container 9 containing the
preparation 10. The pump 6 delivers the flowable preparation 10 via
the suction line 8 from the container 9 into the pressure line 7,
from which the preparation 10 is released into the surrounding
environment of the toilet freshener 1. The pressure line 7 can be
configured so that it counteracts gelation of the released
preparation (e.g., by selection of a suitable diameter).
[0142] The container 9 can have a pressure equalizing valve 11 for
equalizing the pressure between the surrounding environment and the
interior of the container 9 when the pump 6 is pumping preparation
10 out of the container 9.
[0143] The pump 6 can be actuated by the control unit 4 so that the
delivery direction of the pump 6 is reversed, and preparation still
present in the pump 6 and lines 7 and 8 is delivered back into the
container 9. This back-flushing can be advantageous when the
preparation 10 thickens, clogging the lines 7 or 8.
[0144] FIG. 2 shows a further embodiment of the dispensing device
of FIG. 1 wherein the container 9 is connected to the pressure side
of the pump 6. Here, the pump 6 builds up pressure in the container
9 by pumping ambient air into the container 9, thereby expelling
the preparation from the container 9. A valve 11 can be provided on
the preparation outlet side of the container 9, permitting release
of the preparation 10 from the container 9 once a defined pressure
is achieved in the container 9. This can be useful when dispensing
is by a defined spray jet or spray mist, and not dropwise.
[0145] In addition, a non-return valve 11a can be provided in the
pressure line 7 between the pump 6 and the container 9, preventing
pressure built up in the container 9 from escaping through the
pressure line 7 when the pump 6 is at a standstill.
[0146] FIG. 3 shows the dispenser 2 of FIG. 1 wherein a two-chamber
container formed from the containers 9 and 13 is connected to the
suction line 8 of the pump 6. The containers 9 and 13 can each
contain different compositions 10 and 14.
[0147] The containers 9 and 13 can each have pressure equalizing
valves 11, 12.
[0148] The outlet openings at the bottom of the containers 9 and 13
are connected to the suction line 8 and pump 6 so that the
preparations 10 and 14 are pumped through the suction line 8 in a
defined ratio to one another. It may be necessary to adjust the
flow conditions in the pressure lines 8 leading to the outlet
openings at the bottom of the containers 9 and 13.
[0149] When more than two different preparations 10 and 14 are
used, it is advantageous to control dispensing so that two mutually
compatible preparations are delivered in succession through the
lines 7, 8 and the pump 6.
[0150] Incompatibility of two preparations can result in, for
example, an exothermic reaction, thickening, flocculation, pH value
modification, color change or the like.
[0151] A third container can be provided that contains a flushing
fluid for cleaning at least one of the preparations 10, 14 from the
lines 7, 8 and the pump 6. Air can also be used for flushing the
lines 7, 8 and the pump 6. By flushing the lines 7, 8 and the pump
6, it is possible to prevent residues of mutually incompatible
preparations from coming into contact.
[0152] FIG. 4 illustrates a further development of the toilet
freshener 1 of FIG. 3. The pressure lines 8 leading to the outlet
openings at the bottom of the containers 9 and 13 each have a
passive valve 15 and 16, allowing defined setting of the dispensing
ratios of the preparations 10 and 14 from the containers 9 and
13.
[0153] The valves 15 and 16 can also be designed as
temperature-sensitive bimetallic valves that open or close when a
defined temperature is reached. In particular, the valves 15 and 16
can be different bimetallic valves so that, for example, only one
preparation is delivered by the pump 6 from one of containers 9 or
13 once a defined temperature has been reached.
[0154] A common feature of the dispensers according to FIGS. 1-4 is
that the control unit 4 controls the pump 6 by processing the
signals from the sensor unit 5.
[0155] A basic control algorithm 20 is shown in FIG. 6 as a flow
diagram.
[0156] The control algorithm 20 is activated as soon as the
dispenser 2 is switched on. In a first process step 22, the control
unit 4 receives the signals from the sensor unit 5. In the control
unit 4, the received sensor signal is compared with a threshold
value stored in the control unit 4.
[0157] In the following process step 24, a selection condition is
used to check whether the sensor signal and the threshold value are
in a defined relationship to one another. If the condition is met,
the pump 6 is then activated by process step 25. If the condition
is not met, sensor signals continue to be received and evaluated by
the control unit according to process step 22.
[0158] As can be seen from process steps 25-29, the pump 6 remains
in an activated state until a sensor signal arises which, on
comparison with a threshold value stored in the control unit 4,
causes the micropump to be switched off. According to this
procedure, preparation is pumped out of the containers for as long
as the sensor signal varies between two predefined threshold
values, respectively, for switching the pump 6 on and off.
[0159] Alternatively, it is also possible to modify the above
described controller so that a simple trigger circuit is created
wherein switching on the micropump according to process step 25
causes a release of a predetermined amount of preparation, and then
automatically switches off the micropump without requiring a
further, sensor signal-based switching off condition for the pump
6.
[0160] As shown in FIG. 4A, it is also possible to configure the
valves 15 and 16 as components actively controlled by the control
unit 4. In this manner, the mixing ratio of the two preparations 10
and 14 can be actively influenced in a time-variable manner.
[0161] The control scheme underlying this embodiment is shown in
FIG. 7 by flow diagram 30.
[0162] FIG. 5 shows a further possibility for actively influencing
the mixing ratios in time-variable manner. In this embodiment of
the invention, each of the containers 9 and 13 is coupled with a
pump 6 and 19 to be individually controlled by the control unit 4.
The corresponding control algorithm is shown in FIG. 8.
[0163] FIG. 9 shows the dispensing device of FIG. 1 wherein an RFID
label 42 suitable for identifying the size and the contents 10 of
the container 9 is arranged on the container 9.
[0164] The sensor unit 5 includes an RFID receive unit capable of
reading information from the RFID label 42 arranged on the
container 9. This information is relayed as a control signal to the
control unit 4 to initiate dispensing of the preparation 10 based
on the contents of the container 9. In particular, control signals
triggered by the RFID label 42 can be used to select a dispensing
program stored in the control unit.
[0165] In this way, a multipurpose dispenser for a plurality of
dispensing applications is provided, such as for the dispensing of
preparations in dishwashers, washing machines, dryers, toilets or
living spaces.
[0166] As an alternative to the RFID label 42, a person skilled in
the art can also provide other means to bring about automatic
identification of the container 9 and its contents 10 by the
dispenser.
[0167] Furthermore, an additional release device 43 can be provided
at the pressure-side opening of the pressure line 7. This release
device 43 provides distribution of the preparation into the
surrounding environment of the dispensing device 1 in a manner
different from dropwise release. This can, for example, include
jet- or spray mist-like release of the preparation, or release
based on vaporization or diffusion. The release device 43 can be in
the form of a nozzle, atomizer, distributor plate or porous
surface. In particular, the release device can be configured to
counteract gelation of the released preparations.
[0168] FIG. 10 shows the toilet freshener of FIG. 1 with a
container 9 detachable from the dispenser 2. The container 9 has at
its lower, bottom end a connection port 47 which can be introduced
into the receptacle 48 provided on the dispenser 1. The connection
port 47 can be closed by closure means so that initially, in the
unused state of the container 9, leakage of preparation 10 from the
container 9 is prevented; however, by inserting the container 9
into the dispenser 2 or the connection port 47 into the receptacle
48, the closure means is destroyed, allowing release of the
preparation 10 from the container 9 by the dispenser 2 into the
surrounding environment. FIG. 11 shows the toilet freshener in its
assembled state.
[0169] The control unit 4 can also be coupled with an acoustic
transducer 46 which converts a voltage or current of the control
unit into an audible acoustic signal. The control unit 4 may
include memory for a plurality of acoustic signals and/or music
and/or speech recordings, which can be retrieved and executed
manually or on the basis of a sensor trigger signal (i.e.,
forwarded to the acoustic transducer 46).
[0170] A light 44 can be connected to the control unit 2, wherein
the light 44 is turned on or off in accordance with a predefined
operating state of the dispensing unit 2. The light can take the
form of, for example, an LED or LCD display.
[0171] The dispenser 2 can be switched on or off with the actuating
element 45. It is also possible for different programs stored in
the control unit 4 to be retrieved and executed by the actuating
element 45.
[0172] FIG. 12 shows a further development of the toilet freshener
according to the invention wherein the power source 3 in the form
of a battery is incorporated in the container 9. The battery 3 is
electrically conductively connected to the dispenser 2 via an
appropriately configured coupling. The capacity of the battery 3 is
designed to supply the dispenser 2 with power over the period of
use until the preparation 10 has been completely emptied from the
container 9.
[0173] FIG. 13 shows the structure of the toilet freshener
illustrated in FIG. 5 in a more detailed schematic diagram. The
chamber 9 is subdivided into two chambers by the wall 49 in which a
first preparation 10 and a second preparation 14 are stored. Each
chamber communicates with the surrounding environment via a
pressure equalizing valve 11 or 12, and each has at its bottom end
a connection port 47a or 47b.
[0174] FIGS. 15-17 show a further embodiment of the toilet
freshener according to the invention. The toilet freshener includes
the dispenser 2 and the container 9, which is detachably fixed to
the dispenser 2. The dispenser has a raised rear wall from which
extends perpendicularly the fastening means 52 in the form of a
clip. The clip 52 is positioned between the rim of the toilet and
the toilet seat, where it is fixed to the toilet bowl by the toilet
seat resting on it. As is seen from FIG. 17, a suction cup can also
be provided on the dispenser for additionally securing the toilet
freshener to the toilet by vacuum.
[0175] A pressure or strain sensor is arranged as a sensor unit 5
on the upwardly directed top side of the fastening means 52. When
pressure is exerted on this sensor unit 5 (e.g., by someone sitting
on a toilet seat), the sensor unit 5 generates a corresponding
signal that is relayed to the control unit 4 of the dispenser
2.
[0176] The container 9 can be separable from the dispenser, as seen
in FIG. 16. The container 9 includes a wick system 50 in its
interior, by which the preparation is released by the release
element 43a from the container 9 into the surrounding environment
by evaporation. The connection port 47 and receptacle 48 in the
dispenser 2 form a liquid-tight connection when container 9 and
dispenser 2 are in the assembled state.
[0177] A release element 43 in the form of a nozzle head is
provided on the clip 52. The nozzle head 43 is arranged in a
movable manner on the clip 52, allowing it to be oriented by the
user. A telescopic element 53 is arranged between the nozzle head
43 and clip 52, allowing the length of the clip 52 and thus the
point of application of the nozzle head 43 to be set. The nozzle
head 43 produces a spray cone 54 from the preparation, which, as
seen in FIG. 18, wets a defined application field within the toilet
bowl 55.
[0178] A further, alternative development of the toilet freshener
according to the invention is shown in FIG. 19. In this embodiment,
the containers 9 and 13 are firmly connected with the dispenser 2
and can be refilled via an opening (not shown in FIG. 19).
[0179] FIG. 20 shows a release element 43 arranged at the distal
end of the clip 52 with an integrated sensor 5 and two nozzles 56
and 57. In this embodiment, the sensor 5 is in the form of an
infrared sensor or ultrasound sensor.
[0180] The nozzles 56 and 57 can be configured to produce identical
or different spray cones 54a, 54b, as illustrated in FIG. 21. As
shown in FIG. 22, the spray cones 54a and 54b can be directed onto
the same application field in the interior of a toilet bowl 55.
However, it is also apparent from FIGS. 23 and 24 that it is
possible to direct the two spray cones in different directions.
[0181] In the embodiment shown in FIG. 23, the release element 43
is fixed by a hook on the inside on the lower rim of the toilet
bowl 55. The release element 43 is therefore displaceably arranged
on the clip 52, as indicated by the arrow in FIG. 23. In addition,
the toilet freshener 1 is fixed by the fastening means 50, here in
the form of a suction cup, to the external rim of the toilet bowl
55.
[0182] The release element 43 has a first nozzle 56 and a second
nozzle 57 spaced apart and arranged in the release element 43 so
that their respective spray cones 54a and 54b point in different,
non-overlapping directions. Spray cone 54a from the first nozzle 56
is accordingly directed into the interior of the toilet bowl 55,
while spray cone 54b from the second nozzle 57 is directed onto the
rim of the toilet bowl. It is also possible, as shown in FIG. 24,
for a spray cone 54b to be directed under the rim of the toilet
bowl 55. The spray cones 54a and 54b can be from identical or
different compositions.
[0183] A sensor unit 5 in the form of a capacitive sensor projects
from the release element under the rim of the toilet 55, such that
the sensor 5 is exposed to water when flushing is actuated. The
sensor 5 is shaped so that it has no significant influence on the
path of the flushing water in the toilet bowl 55.
[0184] FIG. 25 shows a further development of the containers 9 and
13 and of the dispenser 2. The receptacle for the containers 9 and
13 in the dispenser is closable by a flap 58 arranged swivelably on
the dispenser 2. With the flap 58 in the open state, the two
containers 9 and 13 may be separately removed from or inserted into
the receptacle of the dispenser 2.
[0185] FIG. 25 shows in a further embodiment of a toilet freshener
1 having two individually replaceable containers 9 and 13 and a
viewing flap 58 in closed and in open position. The viewing flap 58
is hinged to the rear wall of the toilet freshener and shaped so
that the viewing flap 58 preferably completely covers the
containers 9 and 13 inserted in the toilet freshener 1. The viewing
flap 58 can be equipped with closures which permit child-proof
closure of the viewing flap 58 with the toilet freshener, thereby
preventing unintended access to the containers 9 and 13.
[0186] The lights 44 and actuating element 45 are arranged on the
front of the toilet freshener so that they are not covered when the
inspection or viewing flap 58 is closed, but are instead freely
accessible.
* * * * *