DE102016209147A1 - Household cooking appliance - Google Patents

Abstract

A household cooking appliance (B2) has cooking chamber radiators (2-5), a mechanically switching operation selector switch (8) for connecting or disconnecting at least one cooking chamber radiator depending on a set operating mode, a thermoregulator connected in series with the radiators (9 ), an electronic circuit (K1) with a heating circuit relay (K1.1) and at least one further switchable by the operating selector switch or disconnectable consumer (6), wherein the circuit is connected to the operation selector switch to detect a set mode, and is set up to keep the heating circuit relay (K1.1) closed or clocked depending on the set operating mode, the operating selector switch can switch on or off at least one further load depending on a set operating mode, and the operating selector switch is set to at least a first mode of operation the H eizkreisrelais to connect in series with the cooking chamber radiators and switch in at least a second mode, the heating circuit relay in series with at least one other consumer to separate from the cooking chamber radiators and to switch clocked.

Description

The invention relates to a household cooking appliance, comprising a plurality of electrically operable radiator for heating a cooking chamber, a mechanically switching operation selector switch for connecting and disconnecting at least one radiator depending on a set mode, a mechanical thermoregulator for controlling the activated radiator in dependence on a temperature of Garraums, which thermoregulator is electrically connected in series with the radiators, an electronic circuit with a heating circuit relay and at least one further switched on or off by the operating selector consumer. The invention is particularly advantageously applicable to ovens, especially ovens, in particular with Dampfgarfunktion.

DE 10 2011 017 638 A1 relates to a method for operating a cooking appliance, wherein the operation of at least one heating unit of the cooking appliance is at least temporarily carried out by a control unit of the cooking appliance, wherein during a running cooking program in a first time interval, the control unit is activated and the operation of the heating unit is performed by the control unit, and in a second time interval, the controller unit is deactivated and a clocked operation of the heating unit is controlled by a timer of the cooking appliance.

EP 2 063 180 A2 discloses a heating cycle for a cooking chamber of a cooking appliance, comprising the following steps: activation of at least one heating element for heating the cooking chamber until reaching a predetermined limit temperature; following downshifting a heating power of the at least one radiator to allow the cooking chamber to cool below the predetermined threshold temperature; and subsequently clocked activating at least one heater having a predetermined timing characteristic for a predetermined timing time interval for heating the cooking space until reaching the predetermined limit temperature.

EP 1 461 568 B1 discloses a method of controlling energy intake in an oven that is being filled with a food product when it is cold and then being heated to its operating temperature at full power during a warm-up period and during a subsequent period of time at which the operating temperature is maintained Feeding the full power with a certain repetition rate is heated. An electrical circuit used to carry out the method comprises a thermostat connected in series with the heating elements, timer switching means adapted to provide the desired duty cycle and the desired repetition rate, and the action of the thermostat during operation subsequent heating period override. The timer switch means may be an energy control device connected between the thermostat switch and the electrical elements in parallel with a first temperature switch which is normally open and closes at a temperature of about 130 ° C, and in parallel with a second temperature switch, normally is closed and opens at a temperature of about 65 ° C.

DE 201 18 291 U1 discloses a stove timer with temperature sensor, the stove timer a clock, a temperature unit for processing the temperature signals of the temperature sensor, a control unit, a display unit for displaying time and temperature values, a switching unit for switching on and off at least one connected consumer and connections for connecting the Temperature sensor, the consumer and a power supply, temperature sensors of different types are connected to the stove timer, wherein the temperature unit of the stove timer is designed such that it can process signals of different types of temperature sensors, further, the different types of temperature sensors have differently coded connector , and due to the Steckerkodierung the temperature unit of the stove timer is automatically set to the appropriate type of connected temperature sensor.

DE 10 2004 032 074 B3 discloses a stove timer having a plurality of terminals for consumers, a mode switch for switching the plurality of consumers in response to a selected mode and a switching unit for time and temperature-dependent switching of the plurality of consumers. In order to increase the flexibility in programming the stove timer, the plurality of terminals for the consumers are divided into at least two groups of terminals, and the switching unit has a time and temperature-dependent switching device in the form of, for example, a relay for each group of consumers.

DE 42 28 769 C2 discloses an oven with a temperature sensor for automatic cooking control, the temperature sensor is designed as a heat conducting and garraumseitig is arranged in the field of Grillrohrheizkörpers, and wherein a controller is attached outside the oven to an oven wall and coupled to the temperature sensor, wherein the heat-conducting element as Thermal conductor formed and at least partially surrounded by a protective tube, and that the heat-conducting rod extends perpendicular to the oven wall standing inside the cooking chamber.

EP 1 387 127 A2 discloses a method for timing a Haushaltsgargerätes, in which a user enters into a control time data that define the duration and the daytime classification of at least one cooking process, the controller generates from the input time data control signals that the daily start of cooking, the connection ensure a warming process to the cooking process and the daytime end of the holding process. In addition, a corresponding device is disclosed.

It is the object of the present invention to overcome the disadvantages of the prior art, at least in part, and in particular to provide a household cooking appliance that allows improved steam operation at low cost.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The object is achieved by a household cooking appliance, comprising a plurality of electrically operable cooking chamber radiator for heating a cooking chamber, a mechanically switching operation selector switch for connecting or disconnecting at least one cooking chamber radiator depending on a set or selected mode, a mechanical thermoregulator for controlling the switched cooking chamber radiator depending on a temperature of the cooking chamber ("cooking space"), an electronic circuit with a relay (hereinafter referred to as "heating circuit relay" without limitation to the general public) and at least one further switchable by the operating selector switch or disconnectable consumers, the electronic circuit is connected to the operation selector switch to detect a set by the operation selector switch mode, and is adapted to h h closed the heating circuit relay depending on the set mode operate old (or in particular clocking), the operation selector switch is set to at least one other consumers switch on or off depending on a set mode, and the operation selector switch is set to electrically in at least a first mode, the Heizkreisrelais in series with the To switch cooking chamber radiators and switch in at least a second mode, the Heizkreisrelais electrically in series with at least one other consumer to separate from the cooking chamber radiators and switching to operate, in particular clocked to switch.

This results in the advantage that the mechanical or electromechanical regulation of a cooking chamber temperature can be extended by the mechanical thermal regulator (for example a capillary tube regulator) by at least one independent consumer. This can improve the versatility and performance of the household cooking appliance. This can be achieved by particularly low or virtually no additional costs. In this household cooking appliance, therefore, the heating circuit relay in the second operating mode is assigned a new function or another electrical load. Consequently, a changed control of this relay can be realized. As a result, in turn, this consumer can be clocked independently of the control of the oven temperature and thereby the special additional function (for example, a steam function, for example steam cooking and / or steam addition, etc.) are made possible. The switching operation can include a targeted switching on and off during operation.

The household cooking appliance has at least one cooking chamber. The household cooking appliance has at least one oven functionality, possibly also a microwave functionality and / or a steam functionality. The household cooking appliance may be an oven or have an oven or its functionality. The household cooking appliance can be an independent cooking appliance or a cooking appliance / hob combination or a stove.

The operation selector switch may be adapted to open or close by means of a manual operation at least one associated electrical contact in dependence on the selected or actuated position and thus operating mode. In particular, by opening or closing the at least one contact, at least one radiator and / or at least one other consumer can be switched on to operate under the set operating mode. The operating selector switch can switch on or off different radiators, other consumers or combinations for different operating modes. The operation selector switch can also be called a preselection switch.

A connection and disconnection of an electrical consumer is understood to mean, in particular, that a circuit belonging to the electrical consumer can be closed during operation of the set operating mode (whereby this consumer can be energized) or permanently open (whereby this consumer can not be supplied with current) ). In the switched-off state, therefore, the associated electrical consumer is not operable.

The mechanical or "electromechanical" thermoregulator is adapted to, depending on a set by a user set target temperature, the cooking space temperature regulate. This is done without electronic control contributions, but mechanically or mechanically / fluidically. A mechanical thermo controller is very inexpensive and robust. If the (cooking chamber) temperature applied to the thermoregulator is above the target temperature set thereon, the thermoregulator is open and no current flows through the radiators. If the temperature applied to the thermoregulator is below the set target temperature, the thermoregulator is closed and current can flow through the (connected) radiators. The mechanical thermoregulator may be a capillary tube regulator.

The fact that the operating selector switch is set up to switch the heating circuit relay electrically in series with the cooking chamber radiators in at least one first operating mode means, in particular, that the heating circuit relay is located in the circuit of the activated cooking chamber radiator. It is a development that the heating circuit relay is kept closed in the set operating mode. Consequently, during operation, the at least one connected cooking chamber radiator is switched on and off only by the thermoregulator in order to regulate the cooking chamber temperature. In a development, the heating circuit relay can be operated clocked by means of the electronic circuit.

The fact that the operating selector switch is set up to switch the heating circuit relay electrically in series with at least one further consumer in at least one second operating mode, to disconnect from the cooking chamber radiators and to switch clocked by means of the electronic circuit, comprises in particular that the at least one further consumer independent of the cooking chamber radiators clocked clocked can be energized. The activated cooking chamber radiators can also be switched on and off by means of the thermoregulator.

Under a cooking chamber radiator can be understood in particular an electrically operated radiator whose primary task is to heat the cooking chamber and / or the food. A cooking compartment radiator may e.g. Top heat or grill radiator, a lower heat radiator or a circulating air or ring radiator. A radiator of an evaporator, for example, is not considered a cooking chamber radiator, since its task is primarily in the evaporation of water.

The electronic circuit can be a simple electronic circuit with an integrated circuit - e.g. a controller - which can control or switch the heating circuit relay. The heating circuit relay is a component of the electronic circuit. In general, the electronic circuit can control and in particular have at least one relay for switching at least one load (in particular radiator and / or secondary consumer), which enables a particularly compact circuit. The electronic circuit is in particular configured to control the heating circuit relay as a function of the detected operating mode. This includes in particular that the heating circuit relay for at least one mode (in particular for an automatic mode) can be selectively switched on and off during operation by means of the electronic circuit or alternatively can be selectively kept on and off. For clocking the heating circuit relay, the electronic circuit, the heating circuit relay in particular with a predetermined duty cycle and a predetermined period and on.

The electronic circuit may include an input device or be coupled to an input device. The input device may comprise one or more controls (e.g., buttons, rotary switches, etc.) and / or one or more display devices (e.g., segment display, LCD display, etc.) by means of which a user may e.g. can select a desired period of time (e.g., for a delayed start of a cooking cycle, a cooking time, etc.). The input device may alternatively or additionally comprise one or more touch-sensitive display devices or "touch displays". The electronic circuit can recognize which selection and / or input has been made on the input device.

It is an embodiment that the at least one further consumer is an evaporator. Thus, in the second operating mode - which can then be referred to as steam cooking mode - the evaporator can be operated in cycles, while the conventional cooking chamber radiators are switched on and off via the thermoregulator. Thus, the steam generation can be independent of the heating operation, which allows a tuned to the food steam treatment, which is particularly advantageous for a cooking success. For example, the evaporator may be energized in several time-spaced phases, e.g. are tuned to certain Garabschnitte. Also, an evaporation rate can now be set individually.

It is still another embodiment that in the first operating mode, the at least one further consumer is switched off by means of the operating selector switch. Thus, a particularly simple circuit can be provided. For example, although the at least one further consumer in the first operating mode may be connected in series with the closed heating circuit relay, the associated circuit may be opened elsewhere.

It is a further embodiment that the operating selector switch has a plurality of individual switches, of which a single switch is arranged electrically in series with the heating circuit relay and of which a further individual switch is arranged electrically parallel, these two individual switches with the cooking chamber radiators and with the at least one further consumers are electrically connected, in which at least a first mode of operation with the Heizkreisrelais arranged in series switch is closed and the parallel arranged individual switch is open and in the at least one second mode of operation with the Heizkreisrelais arranged in series single switch is open and the parallel arranged single switch is closed. Thus, with only two additional individual switches a particularly simple (distribution) circuit is provided, in which in the first mode, the heating circuit relay is connected in series with the cooking chamber radiators and in the second mode, an independent operation of the cooking chamber radiator (if switched on) and the at least one other consumer allows.

It is yet another embodiment that the at least one further consumer is connected between the heating circuit relay and the individual switch arranged in series therewith. This allows a particularly simple circuit.

It is also an embodiment that the at least one further consumer is arranged electrically parallel to the cooking chamber radiators and the mechanical thermoregulator. As a result, the advantage is achieved that the at least one further consumer can not be switched on and off by the mechanical thermal regulator.

It is also an embodiment that the electronic circuit is a clock or "electronic clock". This results in the advantage that an already frequently existing electronic circuit can now also be used for the individual operation of at least one further consumer. For the inventive interconnection of the heating circuit relay, the electronic clock need not or only very slightly extended or changed. Consequently, a performance improvement and / or versatility of the cooking operation can take place without or with only a very small additional cost or additional expenditure on the watch circuit.

It is an embodiment which is advantageous for a low adaptation performance that the electronic circuit has as a relay the heating circuit relay and a main relay, since these relays are frequently already present at a clock circuit. The main relay is connected in particular in series with the cooking chamber radiators and the at least one other consumer and may also be connected in series with at least some of the auxiliary consumers of the household cooking appliance. Additional consumers may include, for example, cooking appliance lighting (e.g., an oven light), a recirculating air motor, an operation indicator light, and / or a cooling fan motor. The main relay can serve in particular to switch off the household cooking appliance (except for the clock circuit and possibly a cooling fan). The main relay may e.g. be used to enable a time-shifted and / or time-limited cooking operation controlled by the clock circuit.

The object is also achieved by a method for operating a household cooking appliance having a plurality of cooking chamber radiators, which are arranged electrically in series with a mechanical thermoregulator, and with at least one further consumer, wherein in the method: a mechanically switching operation selector switch for individual connection or turning off the cooking chamber radiator and the at least one further consumer is actuated to select a mode; the selected mode is detected by means of an electronic circuit having a Heizkreisrelais; in a first selected mode of operation, the heating circuit relay is switched in series with the cooking chamber radiators by means of the operating selector switch; in a second selected mode of operation, the heating circuit relay is disconnected from the cooking chamber radiators by means of the operating selector switch and is switched in series with the at least one further consumer; and the Heizkreisrelais is operated clocked at least in the second selected mode by means of the electronic circuit.

The method can be designed analogously to the household cooking appliance and has the same advantages.

So it is an embodiment that in the first selected mode, the at least one further consumer is switched off by means of the operation selector switch and the Heizkreisrelais is kept closed and in the second selected mode at least one cooking chamber radiator is switched by means of the operation selector switch and electrically in series to a mechanical thermoregulator is switched.

The object is also achieved by a household cooking appliance, which is designed to carry out the method.

The above-described characteristics, features, and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following schematic description an embodiment which is explained in more detail in connection with the drawings.

1 shows a first circuit of a first oven; and

2 shows a second circuit of a second oven.

1 shows a first circuit 1 for operating a household appliance in the form of a first oven B1 under several operating modes. For this purpose, the oven B1 several radiators for heating a cooking chamber (o. Fig.) On, namely here, for example, a first top heat or grill radiator 2 , a second top heat or grill heater 3 , a bottom heat radiator 4 and a convection or ring heater 5 , The radiators 2 to 5 are electrically connected on the one hand to an outer conductor L and on the other hand to a neutral conductor N. However, other voltage connections are possible, for example, to a DC voltage source, eg with 230 volts. The radiators 2 to 5 are here for example arranged electrically parallel to each other.

To the radiators 2 to 5 is electrically in parallel an evaporator 6 connected as another consumer. The evaporator 6 may have a steam generating radiator. The steam generating radiator may be the only electrical consumer of the evaporator 6 be. The steam-generating radiator can, for example, heat a vaporizer shell set in a bottom of the cooking chamber, so that water poured into the bowl can evaporate directly into the cooking chamber.

Between the consumers 2 to 6 (ie, the radiators 2 to 5 as well as the evaporator 6 ) and the neutral conductor N are in series a heating circuit relay K1.1 and a temperature limiter 7 connected. Furthermore, between the outer conductor L and the consumer 2 to 6 in series: a mechanical rotary selector 8th , a main relay K1.2 and a mechanical oven regulator in the form of a mechanical thermostat - here, for example, designed as a user-operable capillary tube 9 - switched. The heating circuit relay K1.1 and the main relay K1.2 are components of a watch circuit K1.

The clock circuit K1 is constructed as an electronic circuit and, apart from the two relays K1.1 and K1.2, can have at least one integrated circuit (eg a microcontroller, not shown), etc. The clock circuit K1 is used inter alia for the time control of the oven B1 (eg to implement a timer function and the time display) and can have an oscillator or clock generator (not shown). The watch circuit K1 can also have a display device (not shown, eg a 7-segment display). For example, the clock circuit K1 cause a time-delayed and / or time-limited operation by closing or opening the main relay K1.2. The clock circuit K1 is here directly connected between the outer conductor L and the neutral conductor N and therefore - except when turning off the entire oven 1 at a main switch (not shown) - always operable. The watchdog K1 can be used when the rotary selector switch 8th is in its off position, displaying a time.

The rotary selector 8th has several contacts or individual switches 8.n. (n = 1, ..., 7), which are each individually opened or closed depending on its set rotary position. Each of the individual switches 8.n. can switch one or more contact pairs to open or close. A first single switch 8.1 is electrically arranged between the outer conductor L and the main relay K1.2. A second single switch 8.2 is electric between consumers 2 to 6 and the capillary tube regulator 9 connected. By means of the second single switch 8.2 Depending on the rotational position, a respective individual combination of consumers 2 to 6 with the capillary tube regulator 9 be electrically connected. The second single switch 8.2 can also act as a group of contacts or switches 8.2-m with m = 2 to 6 (not shown), depending on a rotational position of the rotary selector switch 8th individually switched (open / closed) are. This group of switches 8.2-m For example, one could be in series with the first top heat or grill heater 2 arranged switch 8.2-2 one in series with the second top heat or grill heater 3 arranged switch 8.2-3 etc. have.

A third single switch 8.3 is electrically between the neutral conductor N and the temperature limiter 7 connected. A fourth single switch 8.4 is electrically between the second single switch 8.2 and an input of the clock circuit K1 connected. A fifth single switch 8.5 is in series with a circulating air motor 10 a circulating air blower electrically between the third individual switch 8.3 and the heating relay K1.2 switched so that the circulating air motor 10 also independent of the consumers 2 to 6 can be operated. A sixth single switch 8.6 is between the fifth single switch 8.5 and the capillary tube regulator 9 switched and so - on the capillary tube 9 - parallel to the circulating air motor 10 connected. An oven lamp 11 is directly between the main relay K1.2 and the third single switch 8.3 connected. Another secondary consumer is a signal lamp 12 directly between the heating circuit relay K1.1 and the capillary tube controller 9 connected. Further, a seventh single switch 8.7 electrically in series with a cooling fan 13 connected directly between the outer conductor L and the neutral conductor N. Another temperature limiter 14 is parallel to the seventh single switch 8.7 and electrically in series with the cooling fan 13 connected. The consumers 2 to 6 and 10 to 12 Thus, they are electrically connected in series with the main relay K1.2, so that they are not supplied with electrical energy when the main relay K1.2 is open and are consequently switched off. Only the clock circuit K1 and the cooling fan 13 can also be operated with the main relay K1.2 open.

In an off or zero position in which no mode is set or selected, the rotary selector switch can 8th be set up so that all individual switches 8.n. are open. The single switches 8.n. For example, by means of a suitable, for example, connected to a rotary knob, shaft can be actuated. Basically, each selection position of the rotary selector switch 8th Any but fixed combination of the closed states (open / closed) of the individual switches 8.n. be assigned.

To operate the oven 1 a user turns the rotary selector 8th from its off-zero position to an operating position that corresponds to a mode of operation desired by the user. The operating mode may be, for example, a grill mode, a bottom heat and / or top heat mode, or a recirculation mode. The heating circuit relay K1.1 is permanently closed during operation.

Represents a user at the rotary selector 8th For example, a grill mode, the rotary selector closes 8th the individual switches 8.1 to 8.4 , The second single switch 8.2 is between the grill radiators 2 and or 3 and the capillary tube regulator 9 , closed. The single switches 8.5 to 8.7 on the other hand, they can be open. By closing the individual switches 8.1 to 8.3 will cause the circuit of grill radiators 2 and or 3 by means of the capillary tube regulator 9 can be opened and closed to an actual cooking chamber temperature to a through the capillary tube regulator 9 set set cooking chamber temperature.

The closed single switch 8.4 causes the clock circuit K1 can recognize or receives a feedback about that on the rotary selector switch 8th a heating operation has been set. The clock circuit K1 can then implement, for example, a delay time until the beginning of the meal treatment process or cooking process and / or a cooking time, in particular by means of corresponding switching on or off of the main relay K1.2. The delay time and the cooking time may have previously been entered by a user, for example via an input device present at the clock circuit K1 or connected to the clock circuit (not shown). Without inputting a delay time and / or a cooking time, the clock circuit K1 holds the main relay K1.2 with the single switch closed 8.4 permanently closed. After completion of the cooking or heating operation can still the cooling fan 13 by closing the seventh single switch 8.7 be operated in a "follow-up operation".

Is at the rotary selector switch 8th a hot air or Umluftbetriebsart selected, so the second single switch 8.2 be set so that only the circulating air heater 5 is operable. In this case, for example, the fifth individual switch 8.5 be closed to the circulating air motor 10 to be able to operate.

For a steam cooking mode, the evaporator 6 and at least one of the radiators 2 to 5 (in particular the ring radiator 5 together with the circulating air motor 10 ) switched on or operated. This is the evaporator 6 during operation according to the radiator switched on 2 to 5 energized, namely depending on an open position (open / closed) of the capillary tube controller 9 ,

In one variant, an input of the clock circuit K1 with an output of the rotary selector switch 8th connected. The rotary selector 8th is equipped with a coding device (eg in the form of a Kodierschalterplatine, eg based on a coding by means of a gray code, o. Fig.), Which each rotational position of the rotary selector switch 8th assigns a unique output signal or a unique electrical interface configuration. The clock circuit K1 can also be the off position of the rotary selector switch 8th by a corresponding gray code - eg "000" - recognize. Consequently, the clock circuit K1 (eg by means of a suitable evaluation logic or evaluation circuit) can detect in which rotational position the rotary selector switch 8th located. A rotational position of the rotary selector switch 8th may in particular correspond to a respective operating mode.

The clock circuit K1 processes the gray code (eg by means of a corresponding processing device) and can, for example, the heating circuit relay K1.1 now optionally also during operation of a rotary selector switch 8th switch selected operating mode.

In a special variant, the heating circuit relay K1.1 can be switched clocked by means of the clock circuit K1, so that the matching radiator 2 to 5 and the evaporator 8th be energized clocked. For this purpose, for example, the already available to provide a clock function clock or base clock can be used as a basis for the clock of the heating circuit relay K1.1. Such a clocked operation with clocked heating circuit relay K1.1 can also be referred to as a "special mode".

In clocked operation needs in particular no control of the temperature in the cooking chamber or oven chamber of the oven 1 to be carried out. The timing (eg defined over a predetermined period, a duty cycle, etc.) is then not dependent on a temperature in the oven chamber or cooking chamber. The appropriate for the selected special mode timing parameter (period, duty cycle, etc.), the clock circuit K1 based on that of the rotary selector switch 8th determine or specify transmitted or read gray codes. The capillary tube regulator 9 can be adjusted by a user to a temperature value (at which the capillary tube regulator 9 opens or interrupts), which serves as an upper threshold for the temperature value achievable in the pulsed special mode. Alternatively, the capillary tube regulator 9 be set by a user to a temperature value that is above a typically achievable in the clocked special mode temperature value, for example, to a maximum adjustable temperature value.

Consequently, the oven can 1 at least one "manual" operating mode with a mechanical-thermal control via the mechanically adjustable rotary selector switch 8th and the capillary tube regulator 9 perform and perform in at least one other ("special" -) mode in a simple and very inexpensive way a clocked controlled heating operation.

So it can cost a function, such as an energy saving mode or a gentle cooking mode, are offered in cooking appliances with a mechanical control. The here formed as a clock circuit K1 electronic unit can be kept very simple, since basic functionalities (temperature setting, temperature measurement and control) especially for common modes already by the very cost-effective mechanical control element (eg the capillary tube 9 ) are covered.

2 shows a second circuit 21 a second oven B2. The circuit 21 is different from the circuit 1 in that the evaporator 6 no longer with the capillary tube regulator 9 connected in series, but parallel to the radiators 2 to 5 and the capillary tube regulator 9 , In addition, the rotary selector switch points 8th two more individual switches, namely an eighth single switch 8.8 and a ninth single switch 8.9 , The eighth single switch 8.8 occurs instead of the heating circuit relay K1.1 1 and is thus between the temperature limiter 7 and the radiators 2 to 5 connected. The heating circuit relay K1.1 is now on the one hand between the temperature limiter 7 and the eighth single switch 8.8 switched and on the other hand with the evaporator 6 connected. The evaporator 6 on the other hand, is between the capillary tube regulators 9 and the main relay K1.2 switched. The ninth single switch 8.9 is on the one hand between the eighth individual switch 8.8 and the radiators 2 to 5 switched and on the other hand between the heating circuit relay K1.1 and the evaporator 6 ,

For non-clocked modes without steam function, the single switch 8.2 be set so that the circuit of the evaporator 6 is open. In a switching position then the eighth individual switch 8.8 opened, the heating circuit relay K1.1 closed and the ninth individual switch 8.9 be closed. Electricity can then as before by the kept closed during operation Heizkreisrelais K1.1 to the radiators 2 to 5 flow. In an alternative switching position, for example, the eighth individual switch 8.8 closed and the ninth single switch 8.9 and the heating circuit relay K1.1 be open. In both switch positions, the fifth individual switch 8.5 be closed to the circulating air motor 10 to be able to operate.

For a clocked special mode without steam function, for example, the eighth individual switch 8.8 opened and the ninth single switch 8.9 be closed. For example, for a clocked operating mode "hot air ECO" or "circulating air ECO" the single switch 8.2 be set so that only the circulating air heater 5 is operable. Also, the fifth single switch 8.5 closed to the circulating air motor 10 to be able to operate. With the clocked switching of the heating circuit relay K1.1, the circulating air heater 5 operated clocked.

For example, the eighth individual switch can be used for an operating mode with non-clocked cooking chamber heating function and clocked steam function 8.8 closed and the ninth single switch 8.9 to be open. For example, for a clocked mode "steam addition" of the single switch 8.2 be set so that the circulating air heater 5 and the evaporator 6 are operable. Also, the fifth single switch 8.5 closed to the circulating air motor 10 to be able to operate. In this circuit arrangement is the circulating air heater 5 as usual, unblocked via the capillary tube regulator 9 can be switched on and off to the cooking chamber temperature by a capillary tube controller 9 to regulate predetermined setpoint. The evaporator 6 is energized by pulsed switching of the heating circuit relay K1.1 clocked. This gives the advantage that the evaporator 6 independent of the circulating air heater 5 (or any other of the radiators 2 to 4 ) is operable. Here, the heating circuit relay K1.1 does not even need to be switched clocked, but can also be switched to other, for example, irregular way.

Of course, the present invention is not limited to the embodiment shown.

Generally, "on", "an", etc. may be taken to mean a singular or a plurality, in particular in the sense of "at least one" or "one or more" etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.

Also, a number may include exactly the specified number as well as a usual tolerance range, as long as this is not explicitly excluded.

LIST OF REFERENCE NUMBERS

1

 circuit

2

 First grill radiator

3

 Second grill radiator

4

 Bottom heating element

5

 Recirculating air heating

6

 Evaporator

7

 Temperature

8th

 rotary dial

8.n.

 n-th single switch

9

 Capillary tube

10

 recirculated air motor

11

 oven light

12

 Oven pilot lamp

13

 Cooling fan motor

14

 Temperature

21

 circuit

B1

 oven

B2

 oven

K1

 watch circuit

K1.1

 Heizkreisrelais

K1.2

 main relay

L

 outer conductor

N

 neutral

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011017638 A1 [0002]
• EP 2063180 A2 [0003]
• EP 1461568 B1 [0004]
• DE 20118291 U1 [0005]
• DE 102004032074 B3 [0006]
• DE 4228769 C2 [0007]
• EP 1387127 A2 [0008]

Claims (10)

Household cooking appliance (B2), comprising - a plurality of electrically operable cooking chamber radiators ( 2 - 5 ) for heating a cooking chamber, - a mechanically switching operation selector switch ( 8th ) for connecting or disconnecting at least one cooking chamber radiator ( 2 - 5 ) depending on a set operating mode, - a mechanical thermo controller ( 9 ) for controlling the switched-cooking chamber radiator ( 2 - 5 ) as a function of a temperature of the cooking chamber, which thermoregulator ( 9 ) with the radiators ( 2 - 5 ) is electrically connected in series, - an electronic circuit (K1) with a heating circuit relay (K1.1) and - at least one further through the operating selector switch ( 8th ) switchable or disconnectable consumers ( 6 ), characterized in that - the electronic circuit (K1) with the operating selector switch ( 8th ) is connected to one through the mode selector switch ( 8th ) and is set up to keep the heating circuit relay (K1.1) closed or clocked depending on the set operating mode, - the operating selector switch ( 8th ) is set up to provide at least one additional consumer ( 6 ) depending on a set operating mode or switch off, and the operation selector switch ( 8th ) is arranged to - in at least a first mode of operation, the heating circuit relay (K1.1) electrically in series with the cooking chamber radiators ( 2 - 5 ) and - in at least one second operating mode, the heating circuit relay (K1.1) is electrically connected in series with at least one further consumer ( 6 ), from the cooking chamber radiators ( 2 - 5 ) and switch clocked. Household cooking appliance (B2) according to claim 1, characterized in that the at least one further consumer ( 6 ) is an evaporator. Household cooking appliance (B2) according to one of the preceding claims, characterized in that in the first operating mode the at least one further consumer ( 6 ) by means of the operating selector switch ( 8th ) is switched off. Household cooking appliance (B2) according to one of the preceding claims, characterized in that - the operating selector switch ( 8th ) several individual switches ( 8.1 - 8.9 ), of which a single switch ( 8.9 ) is arranged electrically in series with the heating circuit relay (K1.1) and of which a further individual switch ( 8.8 ) is arranged electrically parallel to it, - these two individual switches ( 8.8 . 8.9 ) with the cooking chamber radiators ( 2 - 5 ) and with at least one other consumer ( 6 ) are electrically connected, - in the at least one first mode of operation with the Heizkreisrelais (K1.1) arranged in series single switch ( 8.9 ) is closed and the parallel arranged individual switch ( 8.8 ) is open and - in the at least one second operating mode of the individual with the Heizkreisrelais (K1.1) arranged in series ( 8.9 ) is open and the parallel arranged single switch ( 8.8 ) closed is. Household cooking appliance (B2) according to claim 4, characterized in that the at least one further consumer ( 6 ) is optionally connected in series with the heating circuit relay (K1.1) or is switched off. Household cooking appliance (B2) according to one of the preceding claims, characterized in that the at least one further consumer ( 6 ) electrically parallel to the cooking chamber radiators ( 2 - 5 ) and the mechanical thermo controller ( 9 ) is arranged. Household cooking appliance (B2) according to one of the preceding claims, characterized in that the electronic circuit (K1) is a clock circuit. Household cooking appliance (B2) according to one of the preceding claims, characterized in that the electronic circuit ( 1 ) as a relay (K1.1, K1.2) the heating circuit relay (K1.1) and a main relay ( 1.2 ) having. Method for operating a household cooking appliance (B2) with a plurality of cooking chamber radiators ( 2 - 5 ) electrically connected in series with a mechanical thermoregulator ( 9 ) and at least one other consumer ( 6 ), wherein in the method: - a mechanically switching operation selector switch ( 8th ) for individual connection or disconnection of the cooking chamber radiator ( 2 - 5 ) and the at least one other consumer ( 6 ) is actuated in order to set an operating mode, - the set operating mode is detected by means of an electronic circuit (K1) having a heating circuit relay (K1.1), - in a first set operating mode, the heating circuit relay (K1.1) by means of the operating selector switch ( 8th ) in series with the cooking chamber radiators ( 2 - 5 ), - in a second set operating mode, the heating circuit relay (K1.1) by means of the operating selector switch ( 8th ) of the cooking chamber radiators ( 2 - 5 ) and in series with the at least one other consumer ( 6 ) is switched and - The heating circuit relay (K1.1) is operated clocked at least in the second set mode by means of the electronic circuit (K1). Method according to Claim 9, in which - in the first set operating mode, the at least one further consumer ( 6 ) by means of the operating selector switch ( 8th ) is switched off and the heating circuit relay (K1.1) is kept closed and - in the second set operating mode at least one cooking chamber radiator ( 2 - 5 ) by means of the operating selector switch ( 8th ) and electrically connected in series with a mechanical thermoregulator ( 9 ) is switched.

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