U.S. patent application number 12/711304 was filed with the patent office on 2010-08-19 for toilet flusher having substance dispensing activated by sensor directed at flush water.
Invention is credited to Ralph Butter-Jentsch, Matthias Lueken, Hans-Georg Muhlhausen, Frank Pessel.
Application Number | 20100205727 12/711304 |
Document ID | / |
Family ID | 39577772 |
Filed Date | 2010-08-19 |
United States Patent
Application |
20100205727 |
Kind Code |
A1 |
Muhlhausen; Hans-Georg ; et
al. |
August 19, 2010 |
Toilet Flusher having Substance Dispensing Activated By Sensor
Directed at Flush Water
Abstract
Toilet flusher comprising an energy source, a control unit, a
sensor unit, and at least one first container that contains a first
preparation and may be coupled with the toilet flusher, wherein the
sensor unit detects an initiation of the flow of flushing water
without engaging in the flow of flush water and generates a signal
that is conducted to the control unit that converts the sensor
signal into a control signal for dispensing at least one
preparation.
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: |
39577772 |
Appl. No.: |
12/711304 |
Filed: |
February 24, 2010 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/EP2008/054202 |
Apr 8, 2008 |
|
|
|
12711304 |
|
|
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Current U.S.
Class: |
4/223 |
Current CPC
Class: |
B05B 12/1409 20130101;
B05B 12/1418 20130101; E03D 9/032 20130101; B05B 9/0811 20130101;
B05B 12/122 20130101; B05B 9/0861 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 040 324.2 |
Claims
1. Toilet freshener for introducing at least one active substance
preparation into a toilet bowl, comprising: a power source, a
control unit, a sensor unit, and at least one first container
containing a first preparation, wherein the container can be
coupled with the toilet freshener, wherein the sensor unit detects
initiation of a flush water stream without intervening in flush
water flow and generates a sensor signal able to be forwarded to
the control unit, wherein the control unit converts the sensor
signal into a control signal for release of at least one
preparation, wherein the power source, control unit and at least
the first container interact so that in the presence of a control
signal which represents initiation of the flush water stream, at
least the first preparation is released from the first container
into the surrounding environment by a pump and/or a release
element.
2. Toilet freshener according to claim 1, wherein the sensor unit
is an ultrasound sensor, motion sensor, brightness sensor,
vibration sensor, instantaneous acoustic pressure sensor, moisture
sensor and/or moisture sensor.
3. Toilet freshener according to claim 1, wherein the sensor unit
can measures without contacting the flush water stream.
4. Toilet freshener according to claim 1, wherein the sensor unit
comprises a tube having a diameter of about 2 mm or less extending
into the flush water stream perpendicularly to the flush water flow
direction.
5. Toilet freshener according to claim 1, further comprising a
settable threshold value of the sensor signal at which the control
unit generates a control signal.
6. Toilet freshener according to claim 1, wherein the sensor unit
is directed into the interior of the toilet bowl.
7. Toilet freshener according to claim 1, further comprising a
release element into which the sensor unit is incorporated.
8. Toilet freshener according to claim 1, wherein the sensor unit
is arranged at the distal end of a clip connected with the
dispenser positioned on the outer rim of the toilet bowl.
9. Toilet freshener according to claim 1, wherein the control unit
is a programmable microcontroller.
10. Toilet freshener according to claim 9, further comprising a
plurality of selectable dispensing programs stored in the
microcontroller.
11. Toilet freshener according to claim 1, wherein the control unit
generates a control signal for releasing active substance
preparation when flushing is initiated and generates a control
signal for terminating active substance release once flush water
has stopped flowing through the toilet bowl.
12. Toilet freshener according to claim 1, wherein the pump and/or
release element and at least the first preparation are configured
so that foam is formed on release of the preparation into the
surrounding environment.
13. Toilet freshener according to claim 1, wherein the release
element is movably arranged on the toilet freshener enabling a user
to orient a spray cone produced by the release element onto a
desired application field.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation of International
Patent Application No. PCT/EP2008/054202 filed 8 Apr. 2008, which
claims priority to German Patent Application No. 10 2007 040 324.2
filed 24 Aug. 2007, both of which are incorporated herein by
reference.
[0002] The present invention relates to a toilet freshener with
electromechanically effected release of preparations in or on a
toilet bowl, the toilet freshener having at least one sensor which
can detect a flushing process without significantly influencing
flow conditions in 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 precise, 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 in such a way 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] A significant disadvantage of these toilet fresheners is
that dispensing depends substantially on local flow conditions in
the toilet bowl during the flushing process. However, flow
conditions can vary widely, depending on the type of toilet and
positioning of the toilet freshener in or on the toilet bowl. For
example, with certain toilet types it is possible that no active
substance is released from the toilet freshener due to no or
insufficient water flowing over the toilet freshener during the
flushing process, resulting in the dispensing mechanism of the
toilet freshener not being initiated.
[0008] Further, even if flush water flows as intended over a toilet
freshener, this can disturb the water path intended by the toilet
manufacturer, thereby reducing flushing performance of a
toilet.
[0009] Active substances are typically released from such toilet
fresheners by penetration of flush water through openings in the
toilet freshener, at least partially dissolving the active
substances and discharging them away from the toilet freshener when
the flush water exits through corresponding outlet openings.
Depending on how the toilet freshener is arranged in the toilet,
the amount of flow through it can vary due to very different flow
conditions locally in flush water outlet from the toilet bowl rim,
resulting in only a slight release of active substances.
[0010] Accordingly, the flush water stream can be influenced by
introduction of a toilet freshener. The change in flow conditions
can alter the flushing behavior of the toilet markedly. Often the
flush water stream is influenced so that water is splashed upwards
out of the toilet bowl, with flush water escaping from the toilet
bowl or coming into contact with the user when the toilet is used,
which is undesirable.
[0011] Further, flow paths in toilets are often designed in order
to reduce the amount of flush water used while still maintaining
the same or improved flushing behavior. Any intervention in flush
water flow in toilets so optimized has a far greater effect on
flushing behavior.
[0012] It is therefore desirable to have a dispenser for releasing
active substances into a toilet bowl which dispenses active
substances into the toilet bowl independent of the toilet flushing
process.
[0013] The present invention therefore provides a device which
releases active substances into a toilet bowl during the flushing
process without influencing flow conditions in the toilet bowl
during the flushing process.
[0014] This is accomplished by a toilet freshener comprising a
power source, control unit, and at least one container containing
at least a first preparation, wherein the container can be coupled
to the toilet freshener. A sensor unit detects initiation of a
flush water stream without intervening in flush water flow and
generates a sensor signal for forwarding to the control unit. The
control unit converts the sensor signal into a control signal for
release of at least one preparation. The power source, control unit
and at least the first container interact so that in the presence
of a control signal representing initiation of the flush water
stream, at least the first preparation is released from the first
container into the surrounding environment by a pump and/or a
release element.
[0015] `Without intervening` means that the flush water stream is
not influenced (i.e., does not undergo any significant deviation).
It is therefore particularly preferred that the sensor unit not
contact the flush water stream. However, it is also feasible for
the sensor unit to be brought into contact with the flush water
stream without influencing the flush water stream. This can be
accomplished in the sensor unit by, for example, a thin rod or wire
which is introduced into the flush water stream perpendicularly to
the flush water flow direction.
[0016] The toilet freshener according to the invention consists of
various components which may in turn be combined into assemblies.
These components include 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, the
pump, control unit, sensor unit and power source are combined into
a "dispenser" assembly. The components and assemblies are described
below.
Dispenser--
[0017] 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.
[0018] 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.
[0019] Since, depending on their intended purpose, dispensable
preparations can have a pH value of from 2 to 12, any component of
the toilet freshener which contacts these preparations should have
appropriate acid and/or alkali resistance. In addition, proper
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 that may be present in the
preparation).
[0020] 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 in
such a way that the dispenser is substantially water-tight (i.e.,
the dispenser is thus 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, and
epoxy resins.
[0021] 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--
[0022] For the present application, a pump is a fluid power machine
for moving or delivering in particular small quantities of fluid by
converting mechanical drive power into flow power.
[0023] Fluids are understood to be liquids and gases, and mixtures
thereof and with solids.
[0024] 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.
[0025] The pump is either connected directly to the power source or
to the control unit interposed therebetween.
[0026] In a further embodiment of the invention, release of at
least one preparation can occur merely by gravity without use of a
pump. Release of the 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 may be controlled directly by
the power source or by the control unit connected therebetween.
[0027] The pump, sensor and control unit are advantageously
configured in such a way 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.
[0028] 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 needs, thereby
achieving active substance use which is more effective and better
conserves resources.
[0029] In a further development of the invention, the pump is
configured in such a way that it is able to release an active
substance preparation with a viscosity of <5000 mPas.
Micropump--
[0030] The 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.
[0031] 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.
[0032] 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--
[0033] Diaphragm pumps are particularly advantageous for dispensing
cleaning and active substance preparations as well as
fragrances.
[0034] 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.
[0035] When the inlet valve is closed, the actuator causes
compression of the pump chamber by acting mechanically on the pump
diaphragm, whereby fluid located in the pump chamber is conveyed
out of the pump chamber via the open outlet valve.
[0036] Once the discharge process is complete, the outlet valve is
closed and decompression of the pump chamber is effected by the
actuator, whereby the fluid is then drawn into the pump chamber via
the now open inlet valve.
[0037] By suitable configuration and/or control of the valves and
actuator, the delivery direction the micropump may be influenced or
reversed.
[0038] The diaphragm pump actuator can be electromotive,
piezoceramic, bimetallic, memory metallic, pneumatic, peristaltic,
electrostatic, electromagnetic or thermal drive units.
[0039] The valves can be active or passive valves. Passive valves
include clack valves, diaphragm valves or no-moving-parts
valves.
[0040] Depending on the field of application, pressure-side release
of the preparation from the dispenser can occur dropwise, as a jet
or spray, by diffusion or by vaporization.
[0041] 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.
[0042] 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.
[0043] In this way it is in particular possible to use the
dispenser for the most varied preparations, without jeopardizing
the functionality of the pump by possible deposits or reactions
between two preparations.
Release Elements--
[0044] Release elements are any kind of device suitable for
releasing an active substance into the surrounding environment of
the dispenser.
[0045] Release elements include nozzles, valves, spray heads,
droplet dispensers, foam spray heads, piezo elements, porous
elements, wick systems, capillary systems, nebulizers, ultrasound
nebulizers, ionization nebulizers, etc.
[0046] Nozzles, valves, spray heads, droplet dispensers, foam spray
heads, piezo elements and the like are in particular suitable for
releasing active substances into the toilet or onto the interior
surfaces of the toilet bowl.
[0047] Nozzles, valves, atomizers, spray heads, piezo elements,
sintered plates, porous elements, wick systems and the like are in
particular suitable for releasing active substance preparations
into the air.
[0048] 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
direct application area, while another release element produces a
broad application field. Obviously, various combinations of the
most varied spray cone shapes are possible.
[0049] In particular, the release element can be arranged in
movable manner on the toilet freshener allowing the user to orient
the spray cone on the release element onto a desired application
field. The release element can also permit adjustment of the spray
cone shape.
[0050] The release element can also provide 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.
[0051] The release element can also be constructed as a fan
configured either to improve air quality by drawing in malodors or
to optimize active substance distribution in or on the toilet
bowl.
[0052] 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 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
[0053] Further desired combinations of the configurations shown in
the above table are also possible.
[0054] 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 preparation.
[0055] The release element(s) is/are advantageously configured so
that, irrespective of the positioning 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, wherein different surfaces may be treated
with active substances which differ from one another. For example,
in the case of a German style flat-pan toilet, the pan can be
wetted with an active substance for reducing adhesions, while an
active substance for reducing lime deposits is applied onto the
funnel-shaped walls extending from the pan to the rim of the
toilet.
[0056] 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.
[0057] In another development of the toilet freshener according to
the invention, the first amount released and at least the second
amount released originate from identical or different active
substance preparations.
[0058] According to a further preferred embodiment, the first
amount released and at least the second amount released are
released at different points in time.
Control Unit--
[0059] A control unit for 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
the assistance of information which it processes for the purposes
of the control objective.
[0060] Transducers include pumps and/or valves.
[0061] 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 size of the
toilet freshener is critical.
[0062] The control unit may in particular 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.
[0063] 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.
[0064] In a particularly preferred development of the invention,
the control unit has a dispensing program for introducing at least
two different active substance preparations into a toilet bowl or
into the surrounding environment of the toilet bowl, wherein 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.
[0065] Such a dispensing program allows optimized cleaning
performance due to control of possible chemical reactions due to
appropriately time-offset release of the corresponding preparation
or preparations, some examples of which are listed, but not
exhaustively, 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.
[0066] Another advantage is that a controlled release of one or
more different perfumes can be implemented, thereby at least
reducing dependence on the sense of smell. This can be accomplished
by a clocking procedure and pulsed dispensing of perfume as
described in the art. Furthermore, dependence on smell can also be
reduced by dispensing different perfumes in succession.
[0067] The toilet freshener can also dose a defoaming agent into
the toilet bowl before or during the flushing operation. Excessive
foaming before or during the flushing operation often causes toilet
paper to float on this foam so that it is not properly flushed away
with the flushing water, but instead floats in the toilet bowl even
after the flushing operation has completed. This is unattractive to
the consumer. By dosing the defoaming agent before or during the
flushing operation, excessive foaming is prevented and reliable
disposal of toilet paper is ensured. In addition or as an
alternative to the defoaming agent, substances that dissolve
cellulose may also be added.
[0068] The control unit can be designed so that parameters in the
dosing programs are adjustable. For example, sensor threshold
values can be adjusted during preconfiguration of the toilet
freshener, or by the user during use to trigger release of active
ingredient at a certain sensor threshold value. The setting of one
or more parameters can be implemented by a suitably configured
input device on the toilet freshener. In this way, control of the
toilet freshener can be further optimized and adapted to a certain
application case.
[0069] Further, the release element and at least the first
preparation can be configured so that foam is formed on release of
the preparation into the surrounding environment.
[0070] Alternatively, the pump, release element and at least the
first preparation can be configured so that foam is formed on
release of the preparation into the surrounding environment.
[0071] Foaming provides several possible advantages. For example,
foam is particularly effective in trapping and minimizing malodors
because of its pore and cell structure. Further, foam can be
applied onto the surface of the toilet bowl as an "anti-caking"
coating for reducing adhesion of excreted metabolites to these
surfaces.
[0072] Therefore, in one embodiment the release element includes a
foam spray head, with a preparation having a viscosity of less than
3000 mPas, so that a maximally stable, effectively adhering and
fine-pored foam is formed.
Sensor Unit--
[0073] The sensor unit can include one or more active and/or
passive sensors for qualitative and/or quantitative detection of
mechanical, electrical, physical and/or chemical variables, which
are forwarded to the control unit as control signals.
[0074] In particular, sensors in 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.
[0075] In a simple embodiment, the sensor unit can be embodied as a
toggle, pressure or momentary-contact switch.
[0076] For preparations whose viscosity fluctuates greatly as a
function of temperature, it is advantageous for the volume and/or
mass control of the dosed preparations to provide flow rate sensors
in the dosing device. Suitable flow rate sensors include diaphragm
flow rate sensors, magnetic-inductive flow meters, mass flow rate
measurement according to the Coriolis method, eddy counter flow
rate measurement methods, ultrasonic flow rate measurement methods,
particulate flow rate measurement, ring-piston flow rate
measurement, thermal mass flow rate measurement or active pressure
flow rate measurement.
[0077] It is also possible to store a viscosity curve as a function
of temperature for at least one preparation in the control unit, so
that dosing is adjusted by the control unit in accordance with the
temperature and thus the viscosity of the preparation.
[0078] In another embodiment of the invention, a device for direct
determination of the viscosity of the preparation is provided.
[0079] The alternatives mentioned above for determining the dosing
quantity and/or viscosity of a preparation serve to generate a
control signal, which is processed by the control unit for control
of a pump, whereby constant dosing of a preparation is induced.
[0080] In another preferred embodiment of the invention, the sensor
is configured so that detection of a flushing operation is
implemented without any significant influence on the flow
conditions in the toilet bowl. For example, ultrasonic sensors may
be used for this purpose.
[0081] Furthermore, it is advantageous if in a dosing operation a
defined quantity of a preparation is dispensed in a time of less
than 20 seconds, preferably less than 20 seconds, particularly
preferably less than 5 seconds. With a dosing interval which is as
short as possible, during which a preparation is dispensed to the
surrounding environment, the dispenser can be available promptly
for the next dosing interval and also ensure an effective
dispensing of preparation with ongoing use.
Power Source
[0082] According to the present application, the power source is
understood to be a component of the dispenser, which is expedient
for providing power suitable for self-sufficient operation of the
dispenser.
[0083] The power source preferably supplies electrical power. The
power source can be, for example, a battery, a mains power supply,
solar cells or the like.
[0084] It is also possible to transmit the electrical power
required for operating the dispenser wirelessly by radio waves from
an appropriate transmitter to a corresponding receiver in the
dispenser.
[0085] It is particularly advantageous to design the power source
to be replaceable (e.g., in the form of a replaceable battery).
[0086] However, it is also possible for the power source to be a
mechanical power source such as a dynamo, which converts mechanical
or fluid energy into electricity. This can then be stored in
suitable storage elements such as a capacitor or battery.
Container--
[0087] A container according to the present application refers to a
packaging suitable for enclosing or holding preparations and can be
coupled to the dispenser for dispensing the preparation.
[0088] An arrangement comprising two containers, preferably,
separate from one another, with each containing an active substance
fluid, is especially preferred. However, multiple storage
containers for multiple active ingredient fluids may also be
provided. The storage containers are separated from one another in
order to suppress premature mixing of the active ingredient fluids.
They can be designed to be physically separate or as separate
components in a cohesive body.
[0089] The volume ratio formed from the structural volume of the
dosing device and the filling volume of the container preferably is
<1, especially preferably <0.1, in particular preferably
<0.05. With a predefined total structural volume of the dosing
device and the container, the predominant proportion of the
structural volume is provided by the container and the preparation
contained therein.
[0090] The container typically has a filling capacity of <5000
ml, in particular <1000 ml, preferably <500 ml, particularly
preferably <250 ml, very particularly preferably <50 ml.
[0091] The invention is suitable for dimensionally stable
containers such as pots, tins, capsules, cartridges, bottles,
canisters, cans, cartons, drums or tubes, but can also be used for
flexible containers such as pouches or bags, in particular when
used in accordance with the bag-in-bottle principle.
[0092] A container can also have multiple chambers which can be
filled with different compositions. It is also possible for a
plurality of containers to be arranged to form one unit (e.g., a
cartridge).
[0093] Examples of possible combinations of containers and/or
chambers having the corresponding preparations are summarized in
the following table for a few 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
[0094] 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.
[0095] 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 in the
case of an RFID label with an incorrect or defective ID, the
dispenser does not dispense, but instead an optical or acoustic
signal is produced which notifies the user of the error.
[0096] In order to prevent misuse of the containers, the containers
can also have structural elements which 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 dispenser can be controlled in a manner consistent with
the contents of the corresponding container.
[0097] In another embodiment of the invention, the container may be
under pressure. This is advantageous when the preparation is
sprayed or released without requiring a pump in between. In this
case, 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 for transporting the
preparation, enabling the power source to be made smaller or have a
longer anticipated life.
Fasteners--
[0098] The toilet freshener can additionally comprise fasteners for
fixing the toilet freshener to the toilet bowl. Fasteners include
suction cups, adhesive tape, clips or the like.
[0099] 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--
[0100] Preparations according to the present application are
compositions containing at least one substance from the group of
cleaning agents and/or fragrances.
[0101] According to a further, preferred development of the
invention, preparations include substances for modifying surfaces,
in particular ceramic surfaces.
[0102] Preparations suitable according to the invention include,
for example, fragrance phases, in particular, perfumed fragrance
phases. Such fragrance phases typically contain at least one
fragrance, preferably a 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.
[0103] Bleach phases, in particular chlorine-containing bleach
phases, preferably hypochlorite-based bleach phases, are likewise
suitable as preparations according to the invention, wherein the
bleach phases can contain additional ingredients such as
thickeners, surfactants or emulsifiers, neutralizers, dyes,
perfumes, etc., in addition to the actual bleaching agent and/or
water.
[0104] Further preparations suitable according to the invention
include lime scale removing active substance phases, preferably
acidic lime scale removing active substance phases. In addition to
the actual lime scale remover (which preferably comprises an
organic or inorganic acid) and water, such lime scale removing
active substance phases may optionally contain ingredients such as
surfactants or emulsifiers, thickeners, fragrances, preservatives
etc.
[0105] 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 may also contain still further, conventional ingredients.
Foam boosters are particularly advantageous for pretreating the
toilet bowl with a carpet of foam in order, for example, to prevent
adhesion of excreted metabolites to the surface of the toilet or to
reduce and/or trap malodors.
[0106] Preparations with an antibacterial and/or fungicidal and/or
antiviral active substance phase are likewise suitable according to
the invention, wherein in addition to the antibacterial and/or
fungicidal and/or antiviral active substance and water, the active
substance phase may optionally contain further ingredients, such as
for example surfactants or emulsifiers, thickeners, fragrances,
preservatives etc.
[0107] It is also possible for the preparations to have
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.
[0108] It is likewise possible for the preparations used according
to the invention to be absorbent, in particular, odor-absorbing
active substance phases. In addition to the absorbent and water,
said phases may optionally contain further ingredients such as
surfactants or emulsifiers, thickeners, fragrances, preservatives
etc.
[0109] According to one particular embodiment, the toilet freshener
according to the invention provides the possibility of using
combinations of different preparations in the storage containers,
such that one of the storage containers contains a fragrance phase
as defined above.
[0110] Examples of useful preparation combinations include perfumed
fragrance phases combined with chlorine bleach (which are not
stable when stored together), perfumed fragrance phase with highly
concentrated surfactant phase (foam boosters), fragrance phase with
lime scale 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.
[0111] Of particular interest are high-viscosity to gel-like active
substance fluids with viscosities of the order of about 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.).
[0112] In a further, preferred development 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.). Such low-viscosity to watery
preparations are particularly suitable if the preparation is
sprayed into or onto the toilet bowl.
[0113] Using low-viscosity active substance preparations in
conjunction with the toilet freshener according to the invention
makes it possible to achieve substantially faster and more accurate
dispensing and to dispense 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.
[0114] 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. In this case, release of the preparation can be controlled
or regulated by a control valve actively connected to the control
unit. This embodiment has the further advantage that no power need
be provided by the power source for transporting the preparation,
enabling the power source to be made smaller or have a longer
anticipated life.
BRIEF DESCRIPTION OF THE DRAWINGS
[0115] 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.
[0116] 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.
[0117] 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.
[0118] 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.
[0119] 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.
[0120] 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.
[0121] FIG. 6 is a flow chart illustrating one method of
controlling a toilet freshener according to the present invention
with a pump.
[0122] 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.
[0123] 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.
[0124] 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.
[0125] FIG. 10 is a schematic block diagram of one embodiment of a
toilet freshener according to the present invention with a
removable refill container.
[0126] 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.
[0127] 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.
[0128] 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.
[0129] 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.
[0130] FIG. 15 is a perspective view of one embodiment of a toilet
freshener according to the present invention with an extendible
clip.
[0131] 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.
[0132] 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.
[0133] 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.
[0134] FIG. 19 is a perspective view of one embodiment of a toilet
freshener according to the present invention with individually
replaceable containers.
[0135] 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.
[0136] 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.
[0137] 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.
[0138] FIG. 23 is a side view of one embodiment of a toilet
freshener according to the present invention with integrated sensor
unit and two release nozzles.
[0139] 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.
[0140] 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.
[0141] 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.
[0142] The dispenser 2 includes a power source 3, control unit 4,
sensor unit 5 and pump 6, all 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.
[0143] 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 accordingly 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).
[0144] 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.
[0145] The pump 6 can be actuated by the control unit 4 so that the
delivery direction of the pump 6 is reversed, and any preparation
still present in the pump 6 and the 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.
[0146] FIG. 2 shows a further embodiment of the dispenser known
from FIG. 1 in which 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 when
a defined pressure is reached in the container 9. This can be
advantageous when there is a defined spray stream or spray mist
dosing instead of dropwise dosing.
[0147] 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.
[0148] FIG. 3 shows the dispenser 2 known from 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.
[0149] The containers 9 and 13 can each have pressure equalizing
valves 11, 12.
[0150] 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 here to adjust
the flow conditions in the pressure lines 8 leading to the outlet
openings at the bottom of the containers 9 and 13.
[0151] When more than two different preparations 10 and 14 are
used, it is advantageous to control dispensing so that two mutually
compatible preparations are conveyed in succession through the
lines 7, 8 and pump 6.
[0152] Incompatibility of two preparations can result in, for
example, an exothermic reaction, thickening, flocculation, pH value
modification, color change or the like.
[0153] A third container can be provided containing 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.
[0154] FIG. 4 shows a further development of the toilet freshener 1
known from 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 containers 9 and 13.
[0155] 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 may be conveyed by the pump 6 from one of containers 9
or 13 once a defined temperature has been reached.
[0156] 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.
[0157] A basic control algorithm 20 is shown in FIG. 6 in the form
of a flow diagram.
[0158] 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.
[0159] 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.
[0160] 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 switch 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.
[0161] 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
brings about the release of a defined amount of preparation, and
then automatically switches off the micropump without requiring a
further, sensor signal-based switching off condition for the pump
6.
[0162] 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.
[0163] The control scheme underlying this embodiment is shown in
FIG. 7 with the assistance of a flow diagram 30.
[0164] 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 individually controlled by the control unit 4. The
corresponding control algorithm is shown in FIG. 8.
[0165] FIG. 9 shows the dispenser known from 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.
[0166] The sensor unit 5 comprises an RFID receive unit capable of
reading the information from the RFID label 42 arranged on the
container 9. This information is sent as a control signal to the
control unit 4 to bring about dispensing of the preparation 10
based on the contents of the container 9. In particular, control
signals induced by the RFID label 42 can be used to select a
dispensing program stored in the control unit.
[0167] In this way, a multipurpose dispenser for a plurality of
dispensing applications is provided, such as for dispensing of
preparations in dishwashers, washing machines, dryers, toilets or
living spaces.
[0168] As an alternative to the RFID label 42, a person skilled in
the art may also provide other means which bring about automatic
identification of the container 9 and its contents 10 by the
dispenser.
[0169] Furthermore, an additional release device 43 may be provided
at the pressure-side opening of the pressure line 7. This release
device 43 brings about a distribution of the preparation into the
surrounding environment of the dispenser 1 which differs from
dropwise release. This may for example involve jet- or spray
mist-like release of the preparation or release based on
vaporization or diffusion. The release device 43 may to this end
take the form, for example, of a nozzle, atomizer, distributor
plate or porous surface. In particular, the release device may be
configured so that it counteracts gelation of the released
preparations.
[0170] FIG. 10 shows the toilet freshener from FIG. 1 with a
container 9 detachable from the dispenser 2. The container 9
includes 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 into the surrounding
environment from the container 9 by the dispenser 2. FIG. 11 shows
the toilet freshener in its assembled state.
[0171] The control unit 4 can be also coupled with an acoustic
transducer 46 for converting a voltage or current of the control
unit into an audible acoustic signal. The control unit 4 can
include memory for a plurality of acoustic signals and/or music
and/or speech recordings retrieved and executed manually or on the
basis of a sensor trigger signal (i.e., forwarded to the acoustic
transducer 46).
[0172] 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.
[0173] The dispenser 2 can be switched on or off with the actuating
element 45. It is additionally possible for different programs
stored in the control unit 4 to be retrieved and executed by the
actuating element 45.
[0174] FIG. 12 shows a further development of the toilet freshener
according to the invention in which 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.
[0175] FIG. 13 shows the structure of the toilet freshener
according to the invention known in principle from FIG. 5 in a more
detailed schematic diagram. The chamber 9 is subdivided into two
chambers by a 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 has at its bottom end a connection port 47a or 47b.
[0176] 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 fixable to
the dispenser 2. The dispenser has a raised rear wall from which
perpendicularly extends 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 seen from FIG. 17, a suction cup can
additionally be provided on the dispenser for additionally securing
the toilet freshener to the toilet by vacuum.
[0177] 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 which is relayed to the control unit 4 of the dispenser
2.
[0178] The container 9 is separable from the dispenser, as seen in
FIG. 16. The container 9 has a wick system 50 in its interior, with
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 the receptacle 48 in the dispenser 2
form a liquid-tight connection when container 9 and dispenser 2 are
in the assembled state.
[0179] A release element 43 in the form of a nozzle head is
provided on the clip 52. The nozzle head 43 is arranged in movable
manner on the clip 52, such that it may be oriented by the user.
Between the nozzle head 43 and clip 52, a telescopic element 53 is
arranged, by means of which the length of the clip 52 and thus the
point of application of the nozzle head 43 is settable. The nozzle
head 43 produces from the preparation a spray cone 54 which, as is
apparent from FIG. 18, wets a defined application field within the
toilet bowl 55.
[0180] 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).
[0181] 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 exemplary embodiment, the sensor 5 takes the form
of an infrared sensor or ultrasound sensor.
[0182] The nozzles 56 and 57 can be configured so that they 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 orient the two spray cones in different
directions.
[0183] 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 fastener 50, here in the
form of a suction cup, to the external rim of the toilet bowl
55.
[0184] The release element 43 has a first nozzle 56 and a second
nozzle 57 which are 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 may be formed
from identical or different compositions.
[0185] A sensor unit 5 in the form of a capacitive sensor projects
from the release element under the rim of the toilet 55, enabling
the sensor 5 to be 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.
[0186] 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.
[0187] FIG. 25 shows in a further development of the invention a
toilet freshener 1 with 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 in such a manner that the viewing flap 58 preferably
completely covers the containers 9 and 13 inserted in the toilet
freshener 1. The viewing flap 58 may be equipped with closure means
which permit child-proof closure of the viewing flap 58 with the
toilet freshener and so prevent unintended access to the containers
9 and 13.
[0188] The light 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.
* * * * *