DE102009045295A1 - Method for operating a domestic appliance and home appliance - Google Patents

Abstract

The invention relates to a method for operating a domestic appliance which is connected to a supply network (L, N) for the electrical energy supply, in which an electronic component (L1) of the domestic appliance, which heats up during operation, with a cooling air flow of a cooling device (KL) of the domestic appliance is cooled, whereby after switching off a radiator (HK) of the household appliance, the cooling air flow continues to be generated and the electronic component (L1) is cooled, and when the cooling device (KL) is switched off, the domestic appliance is separated from the supply network (L, N). The invention also relates to a domestic appliance.

Description

The invention relates to a method for operating a domestic appliance, which is connected to the electrical power supply to a supply network, in which a warming in operation electronic component of the domestic appliance with a cooling air flow of a cooling device of the domestic appliance is cooled. Furthermore, the invention relates to a domestic appliance, which is connected to the electrical energy supply to a supply network.

Domestic appliances such as cookers, ovens and the like are connected to an external electrical energy network for energy. Such home appliances have temperaturbeaufschlagte components such as radiators or motors that need to be cooled in order to protect these components in operation against overheating and thus from damage. In particular, however, electronic modules of domestic appliances, which also heat up during operation due to the radiator heat must be cooled in order to avoid a malfunction or impairment.

Usually, such a domestic appliance on a cooling air blower, which is also supplied with energy and generates the cooling air flow.

At present, devices in the energy-reduced operating state, the so-called stand-by state, continue to be constantly connected to the power grid, so that there is also energy consumption in this regard.

Just when components of the domestic appliance are turned off and they are still flowing around after cooling for a certain time with the operated cooling air device with a cooling air flow for cooling, energy is still required to operate the cooling air device can.

It is an object of the present invention to provide a method and a household appliance, which can be operated more energy efficient in terms of network coupling.

This object is achieved by a method comprising the features of claim 1 and a domestic appliance having the features of claim 5.

An inventive method for operating a domestic appliance is designed to the effect that the domestic appliance for electrical energy supply is connected to a supply network and at least one warming in operation electronic component of the domestic appliance with a cooling air flow of a cooling device of the domestic appliance is cooled. After switching off a radiator of the household appliance, the cooling air flow is further generated by the cooling air device and cooled at least the electronic component. When the cooling device is switched off, the household appliance is then disconnected from the supply network. By this very specific mode of operation can be permanently ensured that, when energy is required, and even if the cooling device is still to operate after switching off the radiator, sufficient energy is present, however, when this cooling air flow generation is no longer necessary , a network separation, in particular a network separation taking place immediately thereafter takes place. The energy consumption of the domestic appliance can be reduced because even if no more of the components is needed and the domestic appliance is no longer needed for itself, there is no more coupling to the power grid. In addition to the cooling of the electronics component, cooling of the furniture surrounding the household appliance is also provided for built-in appliances.

Preferably, the network separation is performed electronically controlled.

In particular, it is also disconnected from the supply network in the standby mode of the domestic appliance. This is particularly advantageous because this was not possible in conventional devices due to the monitored or controlled device component cooling.

Preferably, an undesired disconnection from the mains supply is detected and the network connection is generated again, and then at least the cooling device operated again until the required running time of the cooling device for sufficient cooling of the component is reached after switching off the component. Even if, for example due to a power failure or the like, an unscheduled disconnection of the network, this can be detected by the specific circuitry of the domestic appliance and the home appliance is automatically and immediately then, when it is possible again, coupled to the supply network, then the perform more interrupted cooling at least for the electronics component.

It is thus carried out in particular an independent disconnection of the power supply after completion of the device or component cooling by the electronics. A restart of the device in the warm state in case of improper or unwanted disconnection of the mains supply also takes place automatically. It then takes again a resumption of device and component cooling.

Furthermore, the invention relates to a domestic appliance, which is connected to the electrical power supply to a supply network, and has an operating-warming electronic component and a cooling device for generating a cooling air flow for cooling the electronic component. The household appliance further comprises a circuit arrangement which is designed to continue operating the cooling air device after switching off a radiator of the domestic appliance and to further generate a cooling air flow for cooling at least the electronic component and completely shut off the cooling appliance, the domestic appliance from the supply network separate.

In particular, the domestic appliance is an electric cooker or an oven or a hob or the like, wherein in this context in particular home appliances for preparing food with at least one radiator and / or a motor and / or a circuit carrier and a cooling air blower are included.

An embodiment of the invention will be explained in more detail with reference to schematic drawings. Show it:

1 a circuit arrangement as formed in a domestic appliance according to the invention; and

2 a diagram in which operating states as a function of time are shown.

The circuit arrangement 1 thus shows a part of the household appliance, which is an oven or an electric cooker or a hob. The household appliance can be connected to a supply network for the supply of electrical energy. For this purpose, the poles L and N are shown in the figure. The circuit arrangement 1 includes an on-button S1 and a holding relay K1. Furthermore, a temperature switch V1 or alternatively a switch-on edge detection device is provided. In addition, an electronic module or an electronic component L1 is present. The circuit arrangement 1 also includes a power supply G1.

In 2 a simplified diagram is shown in the operating conditions as a function of the time t, for example, a radiator HK and a cooling air blower KL are shown.

If, for example, the domestic appliance is put into operation and at least one heating element is heated to heat a cooking zone or a baking chamber, it is switched on at time t0 and brought to a specific operating state Z1. The radiator heats up thereby and to prevent overheating of the radiator or other components of the domestic appliance, the cooling air blower KL is turned on at time t1 and brought to the operating state Z2. If the radiator is no longer needed in the active state, it will be switched off at the time t2, which in addition further cooling of the electronic module L1 and possibly furniture, in which the oven is arranged as a built-in unit, is required and the cooling air blower KL continues is operated. Therefore, energy is still required and the domestic appliance remains connected to the electric power grid. Via a control device and the circuit arrangement 1 controlled, the cooling air blower KL is operated in the active state over a further predetermined time, which is dependent on the temperature profile of the component to be cooled. The temperature detection can be done via sensors. If a sufficient cooling of the component is then achieved at time t3, then the cooling air blower KL is switched off at this time t3. Essentially at the same time, the domestic appliance is then also completely disconnected from the electrical power supply network, so that even in stand-by mode there is no longer energy consumption and, as it were, a consumption level of 0 W has been reached.

LIST OF REFERENCE NUMBERS

1

circuitry

L, N

Pole

S1

A button

K1

latching relay

V1

temperature switch

L1

electronic module

G1

power adapter

t0, t1, t2, t3

timings

Z1, Z2

operating conditions

HK

radiator

KL

Cooling fan

Claims (5)

Method for operating a domestic appliance, which is connected to the electrical power supply to a supply network (L, N) in which a warming in operation electronic component (L1) of the domestic appliance is cooled with a cooling air flow of a cooling device (KL) of the domestic appliance, characterized characterized in that after switching off a radiator (HK) of the household appliance, the cooling air flow generated further and the electronic component (L1) is cooled and with the shutdown of the cooling device (KL), the domestic appliance from the supply network (L, N) is disconnected. A method according to claim 1, characterized in that the network separation takes place electronically controlled. A method according to claim 1 or 2, characterized in that in the standby mode of the domestic appliance this is separated from the supply network (L, N). Method according to one of the preceding claims, characterized in that an unwanted disconnection from the mains supply (L, N) is detected and the network connection is generated again, and at least the cooling device (KL) is then operated again until the required duration of Cooling device (KL) for sufficient cooling of the electronic component (L1) after switching off the radiator (HK) is achieved. Domestic appliance, which is connected to a supply network (L, N) for the purpose of electrical energy supply, and has an operation-warming electronic component (l1) and a cooling device (KL) for generating a cooling air flow for cooling the electronic component (L1), characterized in that the domestic appliance comprises a circuit arrangement ( 1 ) which is designed to continue to operate the cooling air device (KL) after switching off a radiator (HK) of the domestic appliance and to further generate the cooling air flow for cooling the electronic component (L1) and to switch off the cooling device (KL) to separate the domestic appliance from the supply network (L, N).

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