EP2488089A2

EP2488089A2 - Household appliance, in particular a household dishwashing machine

Info

Publication number: EP2488089A2
Application number: EP10759860A
Authority: EP
Inventors: Reinhard Hering; Michael Rosenbauer
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2009-10-12
Filing date: 2010-09-24
Publication date: 2012-08-22
Also published as: US20120194348A1; WO2011045159A2; WO2011045159A3; DE102009045594A1

Abstract

The invention relates to a household appliance (HG), in particular a household dishwashing machine, at least having a treatment chamber (BR) which can be opened and closed by means of an appliance door (GT) of the household appliance (HG) for loading and/or unloading and furthermore at least having an operating indicator (BA) having at least a visual and/or acoustic indicator means (AZ) which is designed at least to display and/or signal a completed treatment process of an item to be treated in the treatment chamber (BR). According to the invention, there are appliance door position detection means (GTE) and upon detection of at least one selected appliance door position by the appliance door position detection means (GTE), at least the indicator means (AZ) is deactivated.

Description

Household appliance, in particular household dishwasher

The invention relates to a household appliance, in particular a domestic dishwasher, at least comprising a treatment room, which can be opened and closed with a door of the household appliance for loading and / or unloading, further comprising at least an operation display with at least one optical and / or acoustic display means at least for indicating and / or signaling a completed treatment process of a product to be treated in the treatment room,

In the evaluation of household appliances by consumer organizations, the energy consumption of the household appliance, in particular its annual energy balance, plays an important role. Household appliances have an operation display with at least optical display means, for example LEDs, with which during operation of the household appliance operating parameters, etc., and after completion of a

Treatment process can be displayed according to a program that the treatment process has been completed. However, the household appliance remains at the end of the program on the power grid until the customer actively intervenes and turns off the household appliance by pressing the main switch.

The object of the invention is to provide a domestic appliance, in particular household dishwasher, in which the energy consumption is further reduced.

Device door position detecting means are provided according to the invention, wherein detection of at least one selected appliance door position by the

Device door position detecting means towards at least the display means is deactivated. The invention is based on the finding that conclusions can be drawn on the basis of a current door position of the appliance door after completion of the treatment process or after the end of the program as to whether the operation of the optical display means is still required for the user or not. In the event that a door position is detected in which, for example, the display of the end of the program is not deemed necessary, therefore, the program end display means can be deactivated. For example, after the expired treatment process and at the same time detected closed door a program end display for the customer be important so that he is informed of the current operating state of the household appliance. In contrast, after conclusion of the treatment process as well as in already half-open or ajar device door, the inference can be drawn that the user is already informed about the end of the program and by opening the door in an ajar position or a half-open position first

Would like to cool down the treatment room or the material to be treated. Thus, it is customary, in particular in household dishwashers, to swing the appliance door from the closed position into a disjointed door position or into a half-open door position after the end of the program in order to cool the dishes

accelerate. In the case of such, after the end of the program ajar or opened door is therefore an indication of the end of the program for the customer without benefit, so that the display means can be disabled. In a preferred embodiment it is provided that the

Device door position detecting means for deactivating the display means is in signal communication with a control device of the household appliance, and that the

Control device on a selected door position representing signal of the device position detecting means towards the display means deactivated. This offers the advantage that the device door detection means can also be used as triggering means for other functions which are triggered by the control device of the home appliance, such as e.g. the switching on of an interior lighting of the treatment room.

In a further, preferred embodiment it is provided that the

Device door position detecting means for interrupting a power supply supplying the display means is formed when the selected

Door position is reached. The appliance door position detecting means stops detecting the selected door position to deactivate the display means

Display means with electrical energy supplying power supply. Thus, a particularly simple construction is achieved in which the appliance door detection means act as a switch which interrupt a power line which supplies the display means with electrical energy. In general, the selected appliance door position in which the program end display means are disabled may be between a fully open and a fully closed appliance door position. When the door position of the door is fully open, the end-of-program display means may also be reactivated.

The above-mentioned selected appliance door position, for example in the case of a domestic dishwasher, may be an ajar position or a half-open position in which loading and / or unloading of the treatment space is prevented, which usually can only take place in the fully open appliance door position in which the appliance door is in the horizontal plane in the case of a domestic dishwasher.

In addition, the optical display means can also be deactivated at least partially automatically after a completed treatment process, if appropriate immediately after the detection of the above-mentioned selected appliance door position.

The appliance door position detecting means may comprise at least one Hall sensor. The use of Hall sensors in door locking systems is well known. As a position detection sensor or contactless button, the Hall sensor acts with a

Permanent magnets together. The Hall sensor may therefore for example preferably be fixedly arranged on a housing of the household appliance and cooperate with a magnet arranged in the usually pivotable door.

Alternatively, the Hall sensor can also be arranged on the appliance door. A Hall sensor arranged in this way detects whether the appliance door is closed or opened. Therefore, if an open position of the appliance door is detected by the Hall sensor, a controller of the household appliance which is in signal communication with it can generate the switch-off signal, to which the display means can be deactivated. As an alternative to a Hall sensor, at least one inclination switch can be used as the device door position detection means, which can be a pivoting adjustment from an exemplary vertically closed door position to an oblique position of the appliance door detected. In contrast, instead of the inclination switch, an angle measuring device can also be used.

Furthermore, it is preferably provided that the power switch and a circuit breaker are arranged in parallel. The power grid may e.g. abut on a microswitch formed switch and the switching element connected in parallel thereto. When put out of service home appliance, both the power switch and the switching element are open. By pressing the microswitch, the deactivated, that is open switching element of the self-holding contact circuit can be bypassed, whereby the control device is acted upon by a voltage pulse. The voltage pulse is passed via the control device to the self-holding contact circuit, whereby the self-holding contact circuit closes the switching element. In this way, current flows from the network via the now closed switching element

Self-holding contact circuit, so that the switching element remains stably closed while the power switch is open again. As soon as the control device conducts the switch-off signal to the self-hold contact circuit, this opens the switching element, whereby the

Power supply to the household appliance is interrupted.

It is preferably provided that an equally high electrical voltage is applied to the power switch and the off switch. This allows a particularly simple structure.

It is preferably provided that the power switch and the off switch an input and / or off-pulse are transmitted to the control device. It is further preferably provided that the power supply with the power switch and the circuit breaker is arranged forming a series circuit. In addition, it is preferably provided that the control device is connected to the power supply with electrical energy supplied. It is further preferably provided that the operating display is connected to the power supply with electrical energy supplied. Finally, it is preferably provided that the self-holding contact circuit is assigned to a controllable by the controller control.

The self-holding contact circuit may preferably have a bistable relay with which a relay contact acting as a switching element can be switched. Such a bistable relay is characterized above all by the property that it can assume two different stable switching states when de-energized. A relay contact of the bistable relay may be connected as the switching element in the main supply line of the household appliance. If the bistable relay is energized with the turn-off signal, it switches the relay contact from a stable de-energized open state to a stable de-energized closed state, or vice versa, whereby the household appliance is completely de-coupled from or connected to the mains. Instead of a relay, a flip-flop, in particular an RS flip-flop, can also be used.

Finally, it is preferably provided that the self-holding contact circuit is connected to the circuit breaker such that the circuit breaker can be brought into an open state, so that a separation of the supply voltage is possible in a simple way.

In a method of operating the home appliance, the current

Detected appliance door position and by an evaluation of the control device of the

Household appliance evaluated. The detected appliance door position is compared in the evaluation unit. If the detected appliance door position corresponds to the selected appliance door position, then the control device can deactivate at least the visual display means. Advantageous developments are specified in the subclaims.

Hereinafter, an embodiment of the invention with reference to the accompanying figures will be described. Show it:

Figure 1 is a schematic perspective view of a household dishwasher. FIG. 2 shows a circuit arrangement of the household dishwasher; FIG. and

Fig. 3 in a schematic representation of the household dishwasher with

different appliance door angle positions. In Fig. 1 is shown as an exemplary embodiment of a household appliance, a household dishwasher with a front door GT, which is pivotable in a known manner about a bottom horizontal pivot axis and opened with a feed opening of the washing compartment BR for loading and / or unloading can be closed. The feed opening is bounded above by a control panel B, which carries a micro-switch ES and only indicated optical display means AZ a power indicator BA. In addition, input means E are provided with which operating parameters for a rinse cycle of the domestic dishwasher can be entered.

The provided in Fig. 1 in the left area of the control panel B microswitch ES is exemplified here as a key switch. At a push of the

Microswitch ES, the domestic dishwasher can be switched to operational readiness, while in a subsequent printing operation, the household dishwasher is decoupled from the power grid.

2, a circuit arrangement is shown, in which inter alia the

Micro switch ES and the operating indicator BA are integrated. In the shown

Circuitry is the household dishwasher over a

Main supply line H connected to the power supply network. In the

Main supply line H is a later-described switching element AS and a power supply NT connected in series.

The power supply unit NT converts the mains voltage of, for example, 230 V into a low voltage of 12 V. The low voltage 12V is converted into a low voltage of 5 V by means of a regulator RG connected in series with the power supply NT, with which a control device SE is supplied. The power supply unit NT also supplies additional device components via additional outputs as well as the low-voltage household appliance operating indicator BA.

The control device SE is integrated in a control module not shown in detail and controls during the execution of a wash program via a first signal line SL1 the optical display means AZ of the operation indicator BA and other device component, such as the drain pump or the circulation pump, by means of control signals S _E.

In the circuit arrangement of FIG. 2, the control device SE with a

Angle measuring device WE connected, which can detect different inclination angle α of the appliance door GT, as illustrated in FIG. Accordingly, when the vertical door GT is closed, the detected angle of inclination α = 0. Depending on the opening state of the appliance door GT, the inclination angle α detectable by the angle measuring device WE can vary in an angle range from 0 to a maximum of approximately 90 °.

At an inclination angle α of 90 °, the appliance door GT is in its fully open approximately horizontal position, in which loading and unloading of the washing compartment BR is possible. Such loading and unloading of the domestic dishwasher, by contrast, is largely prevented at an angle of inclination α of the appliance door GT between the completely open and completely closed appliance door GT.

In order to evaluate the current inclination angle α, the control device SE according to FIG. 2 has an evaluation unit AE, in which the detected inclination angle α is compared with the predetermined angular positions 0 and 90 ° of the appliance door GT. Depending on the result of this comparison, the evaluation unit AE of

Control means generate a switch-off SE _from S through which the AS switch is controllable into its open position, as described later.

As is further apparent from FIG. 2, the control device SE is connected via a second signal line SL2 to a bistable relay RE of a self-holding contact circuit SKS. The bistable relay RE is the relay contact already mentioned

Associated switching element AS, which is connected in place of a mechanical main switch in the main supply line H and as such assumes a main switch function with which the household dishwasher can be decoupled from the power supply network or connected to it.

When put out of service domestic dishwasher both the micro switch ES and the switching element AS is open. Commissioning of the switched off Household dishwasher is effected by means of a pressure actuation of the microswitch ES, in which the initially open switching element AS is bridged. By the pressure actuation of the microswitch ES, a voltage pulse is generated which is conducted via the power supply unit NT and via the controller RG to the control device SE. The control unit SE then forwards a switch S to _a further the bistable relay RE, after which the relay coil is energized and the switching member is moved from the AS normally stable open state into a normally stable closed state. In this way, after the pressure actuation again open microswitch ES is bridged by the now closed switching element AS, whereby the power unit NT the

Mains voltage is applied.

The household dishwasher is thus switched ready for operation, so that subsequently by means of the input means E, a washing program can be started. After the end of the washing program, the control device SE switches the

Device components, such as lye or circulation pump off.

Immediately after the end of the washing program, the evaluation unit AE starts

Control device SE a comparison of the currently detected inclination angle α with the preset angular positions 0 and 90 °. If an inclination angle α of 0 is detected, the evaluation unit AE recognizes that the appliance door GT is closed. If the detected inclination angle α lies between 0 and 90 °, or if the inclination angle α corresponds to approximately 90 °, then the evaluation unit AE recognizes that the appliance door GT is partially or completely opened. In the present case, the evaluation unit AE is set such that the program end display means AZ remain activated both with the door GT fully open and completely closed, while the program end display means AZ are to be deactivated in the intermediate positions of the appliance door GT. For the deactivation of the optical display means AZ, the control device SE generates the already mentioned switch-off signal Saus when the intermediate position of the appliance door GT is detected, with which the bistable relay RE is actuated immediately after the wash program has ended via the second signal line SL2. Then the relay RE switches the Switching member AS from the closed position to the open position, whereby the

Household dishwasher is completely disconnected from the mains.

The switching element AS of the relay RE thus acts as a main switch, which automatically disconnects the power supply NT of the domestic dishwasher from the power supply network after completion of the wash program. In this way it is achieved that after the

End of the program in particular a power supply via the power supply NT is interrupted to the optical display means AZ of the power indicator BA. Therefore, it takes place after the end of the program only as long as an energy-consuming optical display, until the user opens the door GT.

As is further apparent from FIG. 2, the microswitch ES is in signal connection via an input line EL directly to the control device SE. The voltage pulse provided by a manual pressure actuation of the microswitch ES is therefore also conducted directly to the control device SE, which detects and evaluates the pulse.

Upon detection of such a voltage pulse, the control device SE checks whether the power supply NT is already activated during the pressure actuation of the microswitch ES. When not activated, power supply PS, the controller SE detects a turning-on operation of the user, and controls, as described above, with the switch-S _on the relay RE to. When already activated power supply NT recognizes the controller SE in the micro-switch pressure actuation a switch off operation of the user, so that the control device SE a corresponding switch-off signal S _out to the relay RE. In this case, the household dishwasher is put out of action. An optionally currently running wash program is thus interrupted.

LIST OF REFERENCE NUMBERS

ES power switch

AS off switch

H main supply line

B control panel

AZ display means

BA operating display

EL input line

RG controller

SE control device

RE bistable relay

SKS self-holding contact circuit

ST control

HG home appliance

SL1, SL2 signal lines

AE evaluation unit

GT door

HS Hall sensor

GH housing

GTE device detection device

WE angle measuring device

BR treatment room

Claims

1. Household appliance (HG), in particular domestic dishwasher, at least having a treatment room (BR), with a door (GT) of the

Domestic appliance (HG) for loading and / or unloading can be opened and closed, further comprising at least an operation display (BA) with at least one optical and / or acoustic display means (AZ), at least for displaying and / or signaling a completed treatment process of a to be treated Guts in the treatment room (BR) is formed,

characterized in that

Device door position detecting means (GTE) are provided, and that on a

Detecting at least one predeterminable appliance door position by the

Device door position detecting means (GTE) towards at least the display means (AZ) is disabled.

2. Household appliance (HG) according to claim 1, characterized in that the

Device door position detecting means (GTE) for deactivating the display means (AZ) with a control device (SE) of the household appliance (HG) is in signal communication, and that the display means (AZ) by the control device (SE) to a selected door position representing signal of

Device position detection means (GTE) is deactivated.

3. Household appliance (HG) according to claim 1, characterized in that the

Device door position detecting means (GTE) for interrupting a display means (AZ) energized power supply is formed when the selected door position is reached.

4. Household appliance (HG) according to claim 1, 2 or 3, characterized in that the appliance door (GT) is located in the selected appliance door position in a position between a fully open and a fully closed appliance door position.

5. Household appliance (HG) according to claim 4, characterized in that in the at least one selected appliance door position, the appliance door (GT) prevents loading and / or unloading of the treatment room (BR).

6. Household appliance (HG) according to at least one of claims 1 to 5, characterized

characterized in that after a completed treatment process, the optical and / or acoustic display means (AZ) are deactivated.

7. Household appliance (HG) according to at least one of claims 1 to 6, characterized

in that the appliance door position detection means (GTE) comprise at least one Hall sensor (HS).

8. Household appliance (HG) according to claim 7, characterized in that the

Hall sensor (HS) on a housing (GH) or on the appliance door (GT) of the

Household appliance (HG) is arranged.

9. Household appliance (HG) according to at least one of claims 1 to 6 characterized

characterized in that the appliance door position detecting means (GTE) comprise at least one tilt switch (NS).

10. Household appliance (HG) according to at least one of claims 1 to 6, characterized

in that the appliance door position detection means (GTE) comprise at least one angle-measuring device (WE).

1 1. Household appliance (HG) according to at least one of claims 1 to 10, characterized

characterized in that upon detection of at least the selected door position of the appliance home appliance (HG) is deactivated.

12. A method for operating a household appliance (HG), in particular a household dishwasher, comprising at least the following steps:

Detecting a device position of a device door (GT) of the household appliance (HG) for loading and / or unloading a treatment space (BR) of the household appliance (HG),

Comparing the detected appliance door position with at least one selected appliance door position, and - Deactivating at least one optical and / or acoustic display means (AZ) of a power indicator (BA), at least for displaying and / or signaling a completed treatment process to one

treatment Guts in the treatment room (BR) of the household appliance (HG) is formed.

13. The method according to claim 12, characterized in that at least one between a fully open and a fully closed

Device door position selected device door position of the door (GT) is detected.

14. The method according to claim 13, characterized in that as a selected appliance door position of the appliance door (GT) a device door position is selected in which a loading and / or unloading of the treatment room (BR) is prevented.

15. The method according to claim 12, 13 or 14, characterized in that after a completed treatment process, the display means (AZ) are deactivated.