EP2488087A2

EP2488087A2 - Household appliance, in particular a household dishwashing machine

Info

Publication number: EP2488087A2
Application number: EP10757417A
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: 2010-09-27
Publication date: 2012-08-22
Anticipated expiration: 2030-09-27
Also published as: WO2011045169A3; DE102009045591A1; US9212448B2; RU2540378C2; RU2012114724A; EP2488087B1; PL2488087T3; US20120180830A1; WO2011045169A2

Abstract

The invention relates to a household appliance (HG), in particular a household dishwashing machine, at least having an operating indicator (BA) having at least one visual indicator means (AZ2). According to the invention, the household appliance (HG) is disconnected from a power supply network supplying the household appliance (HG) with electrical energy after the completion of a treatment process and at least the completion of the completed treatment process can be indicated by the visual indicator means (AZ2).

Description

Household appliance, in particular household dishwasher

The invention relates to a household appliance, in particular a domestic dishwasher, at least having an operating display with at least one optical display means.

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. According to the invention, after completion of a treatment process, the household appliance of a household appliance supplying electrical energy

Power supply network separated, and the visual display means are adapted to indicate after disconnection from the supply network at least the completion of the completed treatment process. The appliance is completely from the

Separate power supply network, so no stand-by losses incurred, eg. By means of a self-shutdown device having a self-holding contact circuit, the automatic disconnection of the household appliance from the power grid after completion of a treatment program, eg. A washing program of a dishwasher without intervention of an operator causes. This ensures that no energy has to be expended to display this operating state. The information provided by the display means information about the operating state can therefore without

Energy supply to be maintained by the power grid. This can be realized in different designs. According to one

Embodiment variant, the display means may comprise an electronic paper, the text and / or images permanently without power supply, so a maintenance voltage, can display. The display can be changed at a later time by power supply. Alternatively, the display means may comprise mechanical indicators or information carriers, such as flaps, which immediately before entry of a

Swing operating state and thus indicate the operating state. Alternatively, the display means may comprise a memory metal element, which in

current-carrying state occupy a first position and occupy a second position in the de-energized state and thus actuate mechanical display means.

As an alternative to the preceding embodiments, the display means may be fed in a state independent of the power supply system by means of a capacitor. The display means themselves can be designed to save energy as a so-called low-power LED or transflective LCDs here.

In a preferred embodiment, the non-energized optical display means can complete the completion of the treatment process, i. Rinse, or indicate a standby state of the household appliance. This embodiment is based on investigations, according to which a period of time between the conclusion of the actual treatment process and a subsequent treatment process can be in the range of hours or days. In the event that after the end of the treatment process in commercial household appliances, the main switch is therefore not turned off, in particular the optical display means indicating the end of the program remain activated until the following treatment process. As a result, the energy consumption of the household appliance can be markedly increased in the annual energy balance. With the feature of the invention, however, is the of the

Program end display resulting energy consumption reduced to 0, so that the above-mentioned total energy consumption in the annual energy balance is reduced accordingly.

As already indicated above, the display means may comprise a mechanically adjustable information carrier, which is adjustable to display different operating conditions. The information carrier can partially with a display window of the Display means are brought into overlap. With mechanical adjustment of the information carrier, different display segments of the information carrier can be brought into coincidence with the display view window, whereby the

Different operating conditions can be displayed. The information carrier can be adjusted by means of a particular electrical actuator between the two operating states.

In an energy-saving embodiment, the actuator for a change from the display of the first operating state to the display of the second operating state can be acted upon only with a voltage pulse and this is otherwise energy-free. In a further embodiment, the actuator for displaying the first

Operating state, such as the already mentioned treatment process, be permanently energized. Only in a de-energized state then the actuator is automatically in the second operating state.

By way of example, the actuator can be designed as an electromagnetic, linearly adjustable actuator with a working ram, which is attached to a magnet armature and can be linearly adjusted by means of an electromagnetic coil. Alternatively, the actuator may have a memory metal element which adjusts the information carrier in a current state to a first position for displaying the first operating state in a position for displaying the second operating state.

Alternatively, the actuator may be embodied as a bistable actuator, which in the

de-energized state at least a first position to display the first

Operating state or a second position for displaying the second operating state occupies. The bistable actuator can be switched by means of electrical actuation from the first to the second position and vice versa. The electrical actuation can be generated by means of a voltage pulse.

Furthermore, it is preferably provided that the power switch and a circuit breaker are arranged in parallel. The power supply network can be applied, for example, to a switch formed on a microswitch and to the switching element connected in parallel therewith. at shut down 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. Provided 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 completely decoupled from or connected to the grid. Instead of a relay, a flip-flop, in particular an RS flip-flop, can also be used.

Furthermore, 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 preferred embodiment, it is provided that the display means can be supplied from an energy store of the household appliance with electrical energy after separation from the power supply network. Thus, a display means is used, which consumes electrical energy during operation. For example, can be a very small one

Energy consuming components are used, such. low power LED or transflective LCDs, so that a sufficient operating time is guaranteed.

It is preferably provided that the energy storage device is rechargeable with electrical energy when the household appliance is connected to the power supply network. This is the case, for example, in the case of a new start-up, so that a sufficient operating time is always ensured.

The energy store may be e.g. to act on an accumulator associated with the display means, i. this alone is supplied with electrical energy when the household appliance is disconnected from the power supply network. Preferably

provided that the energy storage is a capacitor of an electric drive of the household appliance, in particular a pump motor. Thus, it is not necessary to provide an additional accumulator, but it may e.g. one as

DC link capacitor serving a pump motor

be used driving motor electronics.

In the following, two embodiments of the invention will be described with reference to the attached figures.

Show it: in a schematic perspective view of a household dishwasher;

FIG. 2 shows a circuit arrangement of the household dishwasher; FIG. Fig. 3, the optical display means with associated actuator according to the first

Embodiment; and

Fig. 4, the optical display means with associated actuator according to the second

Embodiment.

In Fig. 1 is shown as an exemplary embodiment of a household appliance, a household-domestic dishwasher with a front door GT, which is pivotable about a bottom horizontal pivot axis in a known manner and with a feed opening of the washing compartment BR for loading and / or unloading can be opened or closed. The loading opening is bounded above by a control panel B, which carries a micro-switch ES and a merely indicated operating display BA with optical display means AZ1 and with optical display means AZ2. The optical display means AZ1 indicate operating parameters, for example. On the other hand, the optical display means AZ2 indicates the operation during a wash program run and the end of the program after the wash program ends.

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. In a pressure actuation of the microswitch ES, the household dishwasher can be connected to the power supply network, so that it is switched to operational readiness, while at a

subsequent pressure actuation of the microswitch ES, 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 arrangement 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 AS1 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 optical display means AZ1 and AZ2 of the operating display BA of the household dishwasher with low voltage.

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 AZ1 operating indicator BA, via a second signal line SL2, the optical display means AZ2 and other device component, such as

Lye pump or the circulation pump, with control signals S _E on.

In addition, the control device SE controls the display means AZ2 of the operating display BA via the second signal line SL2 in order to indicate the program end of the household dishwasher.

The display means AZ2 is shown in more detail in FIG. 3 in a first embodiment. Consequently, the display means AZ2 has a recessed in the front panel B of the household dishwasher viewing window SF. Behind the

Viewing window SF is arranged behind an adjustable, plate-shaped information carrier IT. This has two display segments "OFF" and "RUN". Depending on

Operating state, its display segment "OFF" or its display segment "RUN" be brought into coincidence with the viewing window SF and so the

indicate current operating state of the domestic dishwasher.

As further apparent from Fig. 3, the information carrier is IT with a

Transfer ram US connected as an electromagnetic actuator actuator AK connected. The transfer ram US is at one within a sleeve-shaped Anchor housing AG linearly adjustable guided magnet armature MA attached. Between the end face of the armature housing AG and a stop ring AR of the transfer tappet US, a compression spring DF is clamped, which presses the transfer tappet US together with the information carrier IT to the right in FIG. On the outer circumference of the armature housing AG sits an electromagnetic coil EMS. This is supplied via connecting lines S _A from the power supply NT with a low voltage of 12V. In the upper in the Fig. 3 connecting line S _A , a switch AS2 is connected, which is shown in Fig. 3 in its open position. The switch AS2 is in turn controllable via the signal line SL2 of the control device SE between its open or closed position.

In the open position of the circuit breaker AS2 shown in FIG. 3, the electromagnetic coil EMS is de-energized and therefore the transfer tappet US is displaced to the right. As is further apparent from FIG. 2, the control device SE is connected via a third

Signal line SL3 connected to a bistable relay RE a self-holding contact circuit SKS. The bistable relay RE is the relay contact already mentioned

Associated switching element AS1, which is connected in place of a mechanical main switch in the main supply line H. The switching element AS1 therefore assumes a main switch function, with which the household dishwasher can be decoupled from the power supply network or connected to it.

When set off-duty domestic dishwasher both the micro switch ES and the switching element AS1 is open, so that a power supply to the household dishwasher is interrupted. Commissioning of the switched off

Household dishwasher is carried out by means of a pressure actuation of the microswitch ES in its closed position, so that the initially open switching element AS1 is bridged. By the pressure of the microswitch ES is a

Provided voltage pulse, which is passed through the power supply NT and the regulator RG to the control device SE.

The control unit SE then forwards a switch _{S, a} further bistable to the relay RE, after which the relay coil is energized and de-energized by the switch member AS1 stable open state is spent in a likewise normally closed stable state. In this way, after the pressure actuation again open microswitch ES is bridged by the now closed switching element AS1, whereby the power supply NT permanently applied to the mains voltage. 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.

During the rinse cycle, the respective set operating parameters are displayed by the optical display means AZ1. In addition, during the wash cycle via the signal line SL2, a control signal is applied to the optical display means AZ2, which is generated by the control device SE.

As a result of this applied control signal, the circuit breaker AS2 in the upper connection line S _{A of} the actuator AK according to FIG. 3 is transferred into its closed position during the wash program. The electromagnetic coil EMS of the actuator AK is thus current flows through during the entire rinsing, so that the armature MA with its transfer ram US of the electromagnetic coil EMS in Fig. 2nd

magnetically attracted to the left. In this case, the display segment "RUN" of the information carrier IT is brought into coincidence with the display view window SF, so that the current rinse cycle is indicated by the visual display means AZ2 as such.

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 wash program, the control device SE also generates a voltage pulse, which activates the bistable relay RE as the switch-off signal S _off via the third signal line SL3. Then the relay RE switches the switching element AS1 from the normally closed stable position in the normally open position, whereby the

Household dishwasher is completely disconnected from the mains.

Consequently, after the lapse of the wash program, no electrical energy is consumed for an indication of the program end.

After completely switching off the domestic dishwasher, the power supply to the actuator AK of the optical display means AZ2 is interrupted, so that the spring-biased transfer ram US of the armature MA is pushed by the spring force of the compression spring DF in its initial position in which the display segment "OFF" of the information carrier IT is brought into coincidence with the viewing window SF, so that the program end of the wash cycle of the household dishwasher de-energized is shown.

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.

FIG. 4 shows the actuator AK of the optical display means AZ2 according to a second exemplary embodiment. Analogously to the first embodiment of FIG. 3, the display means AZ2 of FIG. 4 in the current-carrying state shows the current operation during the execution of the wash program. When de-energized, the optical display means AZ2 indicates the end of the program.

The actuator AK shown in FIG. 4 has a kind of accordion

formed memory metal element ME, which is placed with its ends to the electrical connection lines S _A , of which in Fig. 4, the upper connection line is interrupted by means of the circuit breaker AS2.

The memory metal element ME is held stationary with its left in FIG. 4 end. With its right-hand end, the memory metal element ME with the information tion carrier IT in conjunction. This is in turn biased by the biasing spring VF to the right side, so that in the de-energized state, the display segment "OFF" of the information carrier IT appears in the window SF The information carrier is slidably mounted between indicated upper and lower guides FU.

The circuit breaker AS2 is as in the first embodiment in signal connection SL2 with the control device SE. This controls during the rinse the off switch AS2 in its closed position. The current-carrying memory metal element ME thus contracts against the spring force of the biasing spring VF, whereby the display segment "RUN" appears in the viewing window SF, which indicates that the washing program is currently running.

After the end of the program, as explained with reference to FIG. 2, the household dishwasher is completely disconnected from the power supply network. Accordingly, after switching off the household dishwasher, the memory metal element ME is de-energized, whereby it returns to its in Fig. 4

Initial situation expands, in which the display segment "OFF" of the information carrier IT appears in the window SF.

LIST OF REFERENCE NUMBERS

ES microswitch

AS1, AS2 switching elements

H main supply line

B control panel

AZ1, AZ2 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, SL3 signal lines

BR treatment room

EMS electromagnetic coil

AK actuator

MA magnet armature

US transfer ram

ME memory metal element

DF compression spring

VF preload spring

S _A connecting cables

FU guides

Claims

1. Household appliance (HG), in particular domestic dishwasher, at least having an operating display (BA) with at least one optical display means (AZ2), characterized in that after completion of a treatment process, the household appliance (HG) of a household appliance (HG) with electrical Power-supplying power grid is disconnected, and that the optical

Display means (AZ2) at least the conclusion of the completed

Treatment process as an operating state (OFF) can be displayed.

2. Household appliance according to claim 1, characterized in that with the

Operation indicator (BA) one ongoing treatment process as a second

Operating state (RUN) is displayed when the household appliance (HG) with the household appliance (HG) supplying electrical power network is connected.

3. Household appliance according to claim 1 or 2, characterized in that the

Display means (AZ2) comprise a mechanically adjustable information carrier (IT), which is for displaying the operating states (OFF, RUN) of the

Household appliance (HG) is adjustable.

4. Household appliance according to one of the preceding claims, characterized in that the display means (AZ2) at least one display view window (AF), which is at least partially coincident with the information carrier (IT) can be brought.

5. Household appliance according to claim 3 or 4, characterized in that the

Information carrier (IT) with a particular electric actuator (AK) between the operating conditions (OFF, RUN) is adjustable.

6. Household appliance according to claim 5, characterized in that the actuator (AK) for a change from an indication of the second operating state (RUN) to a Display of the first operating state (OFF) with a voltage pulse

can be acted upon.

7. Household appliance according to claim 6, characterized in that the actuator (AK) for displaying the second operating state (RUN), such as the treatment process, is permanently energized.

8. Household appliance according to one of claims 5 to 8, characterized in that the actuator (AK) is an electromagnetic adjustable actuator.

9. Household appliance according to claim 5 to 8, characterized in that the actuator (AK) has a memory metal element (ME), in an energized state, the information carrier (IT) in a position for displaying the second operating state (RUN) and in a de-energized state in a position for displaying the first operating state (OFF) adjusted.

10. Household appliance according to claim 5 to 8, characterized in that the actuator (AK) is a bistable actuator which in the de-energized state, a first position for displaying the second operating state (RUN) or a second position for displaying the first operating state (OFF) occupies.

1 1. Household appliance according to claim 1 1, characterized in that the bistable actuator (AK) by means of electrical actuation of the first to the second position and vice versa is reversible.

12. Household appliance according to claim 1 or 2, characterized in that the

Display means (AZ2) comprise an electronic paper, which after a

Electricity supply permanently without power supply different

Operating states (RUN, OFF).

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

Display means (AZ2) from an energy store of the household appliance (HG) can be supplied with electrical energy after separation from the power supply network. Household appliance (HG) according to claim 14, characterized in that the

Energy storage is rechargeable with electrical energy, if the

Household appliance (HG) is connected to the power grid.

Household appliance (HG) according to claim 13 or 14, characterized in that the

Energy storage is a capacitor of an electric drive of the household appliance (HG), in particular a pump motor.