[0001] The present invention relates to a method for controlling a household appliance,
in particular a cooking appliance, e. g. a cooking hob. Further, the invention relates
to a system for controlling a household appliance, in particular a cooking appliance,
e. g. a cooking hob.
[0002] A remote control of many household appliances is not generally allowed due to legal
safety requirements. In particular, the remote control of a cooking hob is not allowed.
However, the control of household appliances by remote device, e.g. smartphones or
tablets, and/or by using human voice is increasing and desired by many users. The
control of the household appliance by the remote device could be allowed, if the distance
between the user and the household appliance would be controlled to be within a safe
value in order to allow a manual control or intervention of the household appliance.
[0003] It is an object of the present invention to provide a method and/or a system for
controlling a household appliance, wherein the distance between the household appliance
and a user is reliably controlled by low complexity.
[0004] With respect to the method, the object is achieved by the features of claim 1. With
respect to the system, the object is achieved by the features of claim 7.
[0005] According to the present invention a method for controlling a household appliance,
in particular a cooking appliance, for example a cooking hob, is provided, comprising
the following steps:
- transmission of an information signal, in particular a command signal, to a control
unit and/or a user interface of the household appliance by a user of the household
appliance with the help of a remote control device,
- starting a time period for waiting for a confirmation signal from the user,
- receiving the user's confirmation signal via a confirmation key or confirmation trigger
arrangement,
- processing the information signal by a control unit of the household appliance.
[0006] The invention also provides that the confirmation signal, sourcing from the user,
indicates the user's presence close by or next to the household appliance.
[0007] The main idea of the present invention is that the household appliance, in particular
the cooking hob, is controlled by the remote control device and respective user's
commands are processed only, if not only the command signal for the control of the
household appliance, but also the confirmation signal for confirming the user's presence
near by the household appliance is received by the household appliance, in particular
by its control unit and/or its user interface. A predefined value for the user's distance
to the household appliance may be set.
[0008] The control unit is not processing the information signal, in particular the command
signal, as long as not having received the confirmation signal. Preferably after receipt
of the information signal, or alternatively by simultaneous receipt, the control unit
is waiting for receiving the confirmation signal. The control unit may stay in the
waiting state ad infinitum. A preferred method, however, provides a predefined time
interval, in the space thereof the confirmation signal is accepted by the control
unit or the user interface.
[0009] The time interval may be predefined with a range of any conceivable duration. It
may be feasible, though, to define a period with a duration of 1 to 300 seconds, preferably
with a duration of 5 to 180 seconds and more preferably with a duration of 10 to 300
seconds.
[0010] In order to increase the safety of the controlling of the household appliance, a
further step may be comprised which provides a communication of the received information
signal, in particular the command signal, by the control unit or the user interface
after the receipt thereof. The communication may be performed by displaying the information
signal on a display on the control unit or the user interface or a voice output of
the received information signal by means of a loudspeaker.
[0011] The confirmation signal may be activated, in particular actively activated, by the
user, particularly after having observed the communication of the information signal
by the control unit or the user interface. Alternatively, the confirmation signal
is triggered by the presence of the user merely by his physical presence close by
the household appliance.
[0012] The confirmation signal may be realized by pressing or activating a confirmation
button by the user. This confirmation button may be a wired button or a wirelessly
connected key, possibly even a software key. The button may be arranged or designed
in a way that only an authorized user is able to press or activate it. Additionally
or alternatively, the confirmation signal may be a direct, in particular physical,
operation of a device or appliance by the user, which device or appliance is arranged
near by the household appliance. Another option for a confirmation signal may be a
presence detection signal which identifies a user's, particularly an authorized user's,
presence close by the household appliance. Such a presence detection and indication
may be realized by an infrared signal, a camera signal, a photo sensor signal, a light
beam signal and/or an acoustic signal. Particularly preferred is a confirmation signal,
which ensures confirmation of line of sight of the user to the hob. For example, the
confirmation signal may be conveyed by direct contact of user and hob, particularly
physical or semi-physical interaction of the user and the hob. Physical interaction
as used herein preferably means direct contact of user and appliance or a confirmation
signal input means capable of transmitting the confirmation signal to the hob control
unit. Semi-physical interaction as used herein preferably means the indirect interaction
such as voice signal transfer, gesture signal or the like. For receiving a confirmation
signal in the form of a voice signal a confirmation signal input means is capable
of receiving an audio, preferably vocal signal, and is capable of transmitting the
confirmation signal to the hob control unit. For receiving a confirmation signal in
the form of a gesture signal a confirmation signal input means may comprise a light
path, which may be interrupted to generate the confirmation signal.
[0013] According to the present invention a system for controlling a household appliance,
in particular a cooking appliance, for example a cooking hob, is provided. The system
comprises
- a control unit controlling the operation of the household appliance and processing
commands issued by a user of the household appliance,
- a control unit or the user interface of the household appliance receiving the user's
commands and transmitting the commands to the control unit ,
- a first transmission path for transmitting the user's commands to the control unit
or the user interface by means of remote control,
- a remote control device connected to the transmission path and receiving the user's
commands,
- a second transmission path for transmitting a confirmation signal from the user to
the control unit or the user interface,
- a confirmation key or confirmation trigger arrangement connected to the second transmission
path and receiving the user's confirmation signal,
- a timer controlling a time period which depends on the receipt of the user's command
by the user interface and/or the control unit.
[0014] The inventive system is further characterized in that the first and/or the second
transmission path/paths is/are wired or wireless and that the confirmation signal
indicates or suggests the user's presence close by the household appliance.
[0015] The first transmission path and the second transmission path may be congruent or
identical. But preferably, in order to increase the system security, the first transmission
path is different and independent from the second transmission path.
[0016] In a preferred embodiment, the remote control device is a voice control, which enables
the user to provide the information signal, particularly a command, to the household
appliance, in particular the control unit and/or the user interface thereof. The voice
control may be connected to or implemented in a digital or virtual assistant, for
example "Google Home" (trademark, registered by Google LLC with effect for many countries),
"ALEXA" (trademark, registered by Amazon Technologies, Inc. with effect for many countries)
or "SIRI" (trademark, registered by Apple Inc. with effect for many countries), or
the like. Additionally or alternatively, the remote control device may be a near field
remote control device, in particular an infrared or Bluetooth remote control device.
[0017] Preferably, the voice control arrangement, in particular the digital or virtual assistant,
is positioned next to the household appliance. In such arrangement, it sends a position
identification signal to the household appliance.
[0018] The confirmation key or confirmation trigger arrangement may be a key, preferably
a physical key, in particular a knob or a button, which is arranged at the household
appliance. It may be a specific knob or button only dedicated for the purpose of providing
a confirmation signal.
[0019] A further embodiment provides for the confirmation key or confirmation trigger arrangement
being arranged in and/or monitoring the installation location, in particular the installation
room, of the household appliance.
[0020] In a more preferred embodiment, the confirmation key or confirmation trigger arrangement
is or is allocated to a camera, a microphone, a vibration sensor, an infrared sensor
and/or a light beam monitoring the environment or surroundings of the household appliance.
In that, the confirmation key or confirmation trigger arrangement is arranged next
to the household appliance.
[0021] Particularly the confirmation key or confirmation trigger arrangement may be capable
of receiving and optionally operating a presence detection signal, capable of identifying
a user or a user's presence, in particular an authorized user's, presence close by
the household appliance. The presence detection signal in particular may be an infrared
signal, a camera signal, a photo sensor signal, a light beam signal, a gesture signal,
a modulated or unmodulated electromagnetic signal, particularly selected from the
group comprising RFID, a short range device, or an acoustic signal.
[0022] The invention may be specifically designed for a household appliance which is a cooking
hob, wherein the confirmation key or the confirmation trigger arrangement is arranged
at an appliance, in particular another household appliance, which may be an oven or
an exhaust hood.
[0023] Further, a specific embodiment of the invention may provide a system with different
types of commands, wherein not all types are designated for being processed only after
transmission of a confirmation signal, rather, only specific commands, for example
starting the household appliance, need to be confirmed by a confirmation signal.
[0024] Novel and inventive features of the present invention are set forth in the appended
claims.
[0025] The present invention will be described in further detail with reference to the drawing,
in which
FIG 1 illustrates a schematic perspective view of a cooking arrangement comprising
a cooking hob and an exhaust hood and a remote control device.
[0026] FIG 1 illustrates a schematic perspective view of a cooking arrangement comprising
a cooking hob 1 and an exhaust hood 3. The cooking hob comprises a cooking area with
four cooking zones 5 and an operator control panel comprising a control unit or the
user interface 7. The control unit or the user interface 7 is equipped with operating
buttons 9 and a display unit 11. In the interior of the operator control panel, a
micro control unit 13 is arranged for controlling the operation of the cooking hob
1. The control unit or the user interface 7 is internally connected with the micro
control unit 13 for data exchange between these two components.
[0027] The exhaust hood 3 is arranged above the cooking hob 1 by fully covering the cooking
area of the cooking hob 1 with its suction area 15. The vapour and/or fume which is/are
resulting from the cooking processes are sucked by an exhaust fan (not shown) arranged
inside the exhaust hood 3 and removed from the kitchen, in which the cooking arrangement
is installed, to the environment by means of an exhaust tube 17. Hood operating buttons
19 are positioned on a front face of the exhaust hood 3 for the operation thereof
by the user.
[0028] The operation of the cooking hob 1 can be performed twofold. On the one hand, a conventional,
direct operation may be realized by the user manipulating the hob operating buttons
9 arranged on the control unit or the user interface 7 in order to set or modify the
power level of the respective cooking zone 5. In a similar way, the exhaust hood 3
may be operated also directly in a conventional way by the user manipulating the hood
operating buttons 19, thereby controlling the speed of the exhaust fan.
[0029] On the other hand, both the cooking hob 1 and the exhaust hood 3 may be operated
by the user using a remote control device 21. Via a first transmission path 23 (in
FIG. 1 only illustrated for the connection to the cooking hob 1), the remote control
device 21 transmits the information signals to either the cooking hob 1 or to the
exhaust hood 3. The first transmission path may be a WIFI or a near field connection.
A switch button (not explicitly shown) is comprised by the remote control device 21
for selecting either control of the cooking hob 1 or control of the exhaust hood 3
by the remote control device 21. The user inputs the commands for the control of either
the cooking hob 1 or the exhaust hood 3 by means of universal operating buttons 9'
arranged on the remote control device 21.
[0030] While the exhaust hood 3 may be controlled via the remote control device 21 without
any limitation, the operation of the cooking hob 1 is only allowed, following safety
standards, in case of the user of the cooking hob 1 being in close distance to the
cooking hob in order to be in a position to intervene in case of any unexpected or
dangerous situation resulting from the cooking hob operation.
[0031] Therefore, even though the micro control unit 13 will receive a control command transmitted
via the first transmission path 23 and forwarded by the control unit or the user interface
7, the micro control unit 13 will not immediately process the received control command.
Rather, the micro control unit is waiting for also receiving a confirmation signal
indicating the presence of the user in close distance to the cooking hob 1.
[0032] Said confirmation signal indicating the user's presence is provided by a microphone
25, also arranged at the front face of the exhaust hood 3. The microphone 25 is connected
to the control unit or the user interface 7 of the cooking hob 1 by means of a second
transmission path 27, which may be an infrared signal connection. The microphone 25
may be designed as a directional microphone in order to filter out or reduce the operational
noise, sourcing from the operation of the exhaust fan or its driving motor.
[0033] The microphone 25 is adapted for receiving any sound or noise created by a user being
in close distance to the cooking hob 1. Such sound or noise may be a vocal sound,
a snipping with fingers or the like. The sound or noise may be also created by the
user working on the kitchen, in particular handling with specific devices, e. g. bumping
with a pot 29 positioned on a cooking zone 5 of the cooking hob 1, toggling with a
lid 31 of the pot 29, operating a water tap (not shown) in the kitchen, etc.
[0034] As alternative solutions, the microphone 25 may be replaced in its function as a
user's presence detector by a specific button or knob to be manipulated by the user
in order to trigger a confirmation signal, by a camera or another type of kitchen
observation system monitoring the user moving around, by a light beam device indicating
the user passing the kitchen door or by another household appliance arranged next
to the cooking hob 1 which other household appliance is directly operated by the user
and is in a communication interlocking with the cooking hob 1.
List of reference numerals
[0035]
- 1
- cooking hob
- 3
- exhaust hood
- 5
- cooking zone(s)
- 7
- control unit or the user interface
- 9
- hob operating buttons
- 9'
- universal operating buttons
- 11
- display unit
- 13
- micro control unit
- 15
- suction area
- 17
- exhaust tube
- 19
- hood operating buttons
- 21
- remote control device
- 23
- first transmission path
- 25
- microphone
- 27
- second transmission path
- 29
- pot
- 31
- lid
1. A method for controlling a household appliance (1), in particular a cooking appliance,
for example a cooking hob, comprising the following steps
- transmission of an information signal, in particular a command signal, to a control
unit (7), particularly a control unit comprising a user interface (7) of the household
appliance (1) by a user of the household appliance (1) with the help of a remote control
device (21),
- starting a time period for waiting for a confirmation signal from the user,
- receiving the user's confirmation signal via a confirmation key or confirmation
trigger arrangement (25),
- processing the information signal by a control unit (13) of the household appliance
(1),
wherein the confirmation signal indicates the user's presence close by the household
appliance (1).
2. The method according to claim 1,
characterized in that
a time interval is predefined, in the space thereof the confirmation signal is accepted.
3. The method according to claim 2,
characterized in that
the time interval is a period with a duration of 1 to 300 seconds, preferably with
a duration of 5 to 180 seconds, more preferably with a duration of 10 to 120 seconds.
4. The method according to any one of the claims 1 to 3,
characterized by the further step
- communicating the information signal, in particular the command signal, by the user
interface (7) after receipt of the information signal.
5. The method according to any one of the claims 1 to 4,
characterized in that
the confirmation signal is activated or triggered by the user.
6. The method according to any one of the claims 1 to 5,
characterized in that
the confirmation signal is at least one of
- pressing a confirmation button by the user, in particular a wired button or a wirelessly
connected key,
- directly operating a device or appliance by the user, which device or appliance
is arranged near by the household appliance (1),
- a presence detection signal, identifying a user's, in particular an authorized user's,
presence close by the household appliance (1), in particular an infrared signal, a
camera signal, a photo sensor signal, a light beam signal, a gesture signal, a modulated
or unmodulated electromagnetic signal, particularly selected from the group comprising
RFID, a short range device, or an acoustic signal.
7. A system for controlling a household appliance (1), in particular a cooking appliance,
for example a cooking hob, comprising
- a control unit (13) controlling the operation of the household appliance (1) and
processing commands issued by a user of the household appliance (1),
- a user interface (7) of the household appliance (1) receiving the user's commands
and transmitting the commands to the control unit (13),
- a first transmission path (23) for transmitting the user's commands to the user
interface (7) by means of remote control,
- a remote control device (21) connected to the first transmission path (23) and receiving
the user's commands,
- a second transmission path (27) for transmitting a confirmation signal from the
user to the user interface (7),
- a confirmation key or confirmation trigger arrangement (25) connected to the second
transmission path (27) and receiving the user's confirmation signal,
- a timer controlling a time period which depends on the receipt of the user's command
by the user interface (7) and/or the control unit (13),
wherein the first (23) and/or the second (27) transmission path/paths is/are wired
or wireless, and wherein the confirmation signal indicates or suggests the user's
presence close by the household appliance (1).
8. The system according to claim 7,
characterized in that
the first transmission path (23) is different and/or independent from the second transmission
path (27).
9. The system according to claim 7 or 8,
characterized in that
the remote control device (21) is a voice control, in particular using a digital assistant,
for example "Google Home", "ALEXA" or "SIRI", and/or a near field remote control device.
10. The system according to claim 9,
characterized in that
the voice control arrangement, in particular the digital assistant, is positioned
next to the household appliance (1) sending a position identification signal to the
household appliance (1).
11. The system according to any one of the claims 7 to 10,
characterized in that
the confirmation key or confirmation trigger arrangement is a key, in particular a
knob or button, preferably a specific knob or button, arranged at the household appliance
(1).
12. The system according to any one of the claims 7 to 10,
characterized in that
the confirmation key or confirmation trigger arrangement is arranged in and/or monitors
the installation location, in particular the installation room, of the household appliance
(1) .
13. The system according to any one of the claims 7 to 12,
characterized in that
the confirmation key or confirmation trigger arrangement is or is allocated to a camera,
a microphone (25), a vibration sensor, an infrared sensor and/or a light beam, arranged
close to the household appliance (1).
14. The system according to any one of the claims 7 to 13,
characterized in that
the household appliance (1) is a cooking hob and the confirmation key or confirmation
trigger arrangement is arranged at an oven or an exhaust hood (3) close to the cooking
hob.