EP4317789A1 - Cooking device - Google Patents

Abstract

The invention relates to a cooking appliance (1), in particular a commercial cooking appliance, comprising a housing (2), a cooking space (3) in the housing (2) and a door (4) for closing the cooking space (3), a heating device (9) for heating the cooking chamber (3), a first consumer group (53) which is arranged in a first load circuit (50) for power supply, a fan arrangement (13) with an electric motor (14) for generating circulating air in the cooking chamber (3) , wherein the fan arrangement (13) for power supply is arranged in a fan load circuit (52), and a power supply (30), wherein the first load circuit (50) is connected to a first load circuit connection (35) of the power supply (30) is connected and wherein the fan load circuit (52) is connected to a fan load circuit connection (37) of the power supply (30), the power supply (30) having a first load circuit switch (39) for switching the first load circuit (50 ) and a fan load circuit switch (41) for switching the fan load circuit (52).

Description

The invention relates to a cooking appliance, in particular a commercial cooking appliance, for treating food.

It is the object of the present invention to provide a cooking appliance, particularly for commercial use, which ensures safe and user-friendly operation with a compact design.

The problem is solved through the features of the independent claim. The dependent claims relate to preferred embodiments of the invention.

The invention shows a cooking appliance shown below. The cooking appliance is in particular a commercial cooking appliance. Accordingly, the cooking appliance is designed in particular for use in commercial kitchens. The cooking device can be, for example, a hot air circulation device or a steamer. In particular, it is intended that the cooking appliance enables both the hot fan function and steam cooking. Furthermore, it is preferably provided that the cooking device shown here is designed for the treatment, in particular for cooking, of food for human consumption.

The cooking device includes a housing. There is a cooking space in the housing. This cooking space can be closed using a door. In particular, the door is attached to the housing via at least one door hinge and can therefore be pivoted. The pivot axis of the door is preferably vertical.

The cooking appliance further includes a heating device for heating the cooking space. The heating device is designed in particular as an electrical heating device. Preferably the heating device comprises at least one heating element which is arranged on and/or in the cooking chamber. It is preferably a resistance heating device, with the at least one heating element having a corresponding electrical resistance so that it can be used to heat the cooking chamber when energized. Additionally or alternatively, the heating device can also be designed for heating with gas as fuel.

Furthermore, the cooking appliance includes a first consumer group which is arranged in a first load circuit to provide power. The first consumer group contains at least one consumer, preferably several consumers. In particular, it is provided that the cooking appliance includes a human-machine interface, hereinafter referred to as MMS. A user of the cooking device can use this MMS to receive information about the cooking device and/or make operating inputs. The MMS includes, for example, a display, in particular a touch display, and/or at least one light display and/or at least one user-operable switch and/or a microphone for voice control and/or a camera for monitoring the cooking chamber and/or a camera for monitoring the Insertion area in front of the cooking space. The MMS is preferably located in the first consumer group and is therefore supplied with power via the first load circuit.

In addition, the first consumer group can have further consumers - hereinafter generally referred to as consumer elements. It is preferably provided that the first consumer group comprises as consumer elements: at least one sensor, in particular a temperature sensor, and/or lighting, in particular cooking chamber lighting, and/or at least one fan and/or at least one switchable valve, in particular a hand shower, and/or at least a pump.

The cooking appliance preferably includes a fan arrangement. This fan arrangement has an electric motor for generating circulating air in the cooking space. For this purpose, it is in particular provided that the electric motor is connected to a corresponding fan wheel. The fan wheel is located in particular in or on the cooking space. Preferably, the fan wheel is coaxially connected to the electric motor, so that the output shaft of the electric motor directly drives the fan wheel without a gear.

The electric motor is preferably a direct current motor. The electric motor is particularly preferably a brushless direct current motor.

Furthermore, the fan arrangement can include motor electronics (also referred to as motor control). This motor electronics is connected upstream of the electric motor and controls the electric motor accordingly, for example at the desired speed or with a desired acceleration or deceleration ramp.

The fan assembly is powered in a fan load circuit. In particular, the electric motor in the fan load circuit is supplied with power via the motor electronics.

In addition, the cooking appliance includes a power supply with a first load circuit connection and a fan load circuit connection. It will be explained below that the power supply can optionally have at least a second load circuit connection. It goes without saying that the power supply can have additional load circuits. In particular, the “at least one second load circuit” with the associated second load circuit switch is representative of further load circuits and further load circuit switches.

The first load circuit connection and the at least one second load circuit connection and the fan load circuit connection can also be referred to as outputs of the power supply.

The first load circuit of the cooking appliance is connected to the first load circuit connection of the power supply unit. The fan load circuit of the cooking appliance is connected to the fan load circuit connection of the power supply unit.

The power supply preferably includes a first load circuit switch for switching the first load circuit and a fan load circuit switch for switching the fan load circuit. If the power supply has the optional second load circuit connection, it is preferably also provided that the power supply comprises a second load circuit switch for switching the second load circuit.

It is preferably provided that both the first load circuit and the fan load circuit can be switched on and off via the associated switch in the power supply (first load circuit switch or fan load circuit switch). This means that no independent assembly is required to switch these load circuits. In particular, this results in a very compact structure and a simple design of the security concept. In particular, by supplying the fan arrangement via the common power supply, this possibility arises for a compact design and for safely switching off the fan arrangement by switching off the fan load circuit using the fan load circuit switch.

The switches in the power supply - first load circuit switch and/or second load circuit switch and/or fan load circuit switch - are designed and arranged in particular in such a way that each load circuit can be switched selectively and therefore independently of the other load circuit. Accordingly, it is preferably provided that the first load circuit can be selectively switched by means of the first load circuit switch, without necessarily switching the other load circuits. Additionally or alternatively, it is preferably provided that the fan load circuit can be selectively switched by means of the fan load circuit switch, without necessarily switching the other load circuits. Additionally or alternatively, it is preferably provided that the second load circuit can be selectively switched by means of the second load circuit switch, without necessarily switching the other load circuits.

The power supply is preferably designed for connection to an AC network. In particular, this is an alternating current network in a building. For this purpose, the power supply preferably includes an AC/DC converter. The AC/DC converter is preferably designed for a three-phase wide input voltage range of 3 ^∼ 200-480 volts and/or a single-phase wide input voltage range of 1N ^∼ or 2 ^∼ 100-240V.

The load circuits - in particular the first load circuit and/or the fan load circuit and/or the second load circuit - are preferably DC load circuits. Accordingly, it is preferably provided that the first load circuit connection and/or the fan load circuit connection and/or the second load circuit connection are designed as DC voltage outputs of the power supply.

Furthermore, it is preferably provided that the AC/DC converter(s) is/are designed to supply the multiple load circuit connections with different voltages. For example, a voltage of 36 volts is provided for the fan load circuit, whereas 24 volts are preferably provided for the first load circuit and/or the second load circuit.

In addition, it is preferably provided that the power supply has an EMC filter.

Furthermore, it is preferably provided that the power supply has a power monitoring module which is connected via a power monitoring bus to at least one consumer of the first consumer group and/or the second consumer group. In particular, the performance monitoring bus is connected to the MMS so that via the MMS corresponding information, for example about the current consumption in the individual load circuits, can be displayed.

The power supply is in particular a single, self-contained unit. In particular, the power supply unit has its own power supply housing. The power supply is preferably located inside the housing of the cooking appliance. The power supply unit can protrude at least partially from the housing of the cooking appliance and/or be arranged at an opening in the housing, for example to ensure cooling.

Particularly preferably, the AC/DC converter and the switches (first load circuit switch and/or fan load circuit switch and/or second load circuit switch) are arranged within the one power supply housing, in particular on a common circuit board.

The cooking appliance preferably includes a door switch arrangement which is designed to detect a position of the door. This is particularly advantageous because certain security precautions can be taken depending on the door. For example, when the door is opened, the electric motor of the fan assembly should be switched off to avoid possible injuries caused by the rotating fan wheel. Furthermore, to increase safety, it may be necessary to turn off the heater when the door is open.

It is preferably provided that the door switch arrangement is designed to detect whether the door is open or closed.

In addition, the cooking appliance is preferably designed to switch off the fan load circuit using the fan load circuit switch when the door is detected to be open. Furthermore, it is particularly provided that the cooking appliance is designed to switch the blower load circuit back on via the blower load circuit switch when the closed door is detected.

In the case of cooking appliances, the door is often first opened slightly so that the steam can escape from the cooking chamber. It can be advantageous for the fan arrangement to continue to be active in order to convey the steam out through the gap as quickly as possible. However, if the door is opened further, the fan arrangement should be switched off.

Therefore, the door switch arrangement is preferably designed not to switch off the blower load circuit when the opening gap is up to a predetermined size and when the gap is up to a predetermined size Opening gap above the predetermined size to switch off the fan load circuit. The predetermined size is in particular 20mm to 70mm.

The cooking appliance preferably includes a second group of consumers. The second consumer group or the consumers in the second consumer group is/are arranged to supply power in the second load circuit already mentioned. As described, the second load circuit is connected to the second load circuit connection of the power supply. For the optional second load circuit connection, the power supply includes a second load circuit switch for switching the second load circuit, i.e. for selectively switching this load circuit on and off.

The door switch arrangement is preferably arranged between the second load circuit connection and the second consumer group; In particular, the second consumer group is powered via the door switch arrangement. The door switch arrangement is preferably designed to switch off the second consumer group depending on the detected position of the door.

In the second consumer group and thus in the second load circuit there are particularly consumers that are to be de-energized when the door is open. As previously mentioned, the blower assembly is deactivated by its own blower load circuit switch when the door is opened. In addition, however, it is preferably also provided that other elements of the cooking appliance are deactivated when the door is open. This includes, for example, the heating device and/or circulation of a cleaning fluid in the cooking chamber.

It is preferably provided that there is at least one heating switch in the second consumer group. Particularly preferably, several of these heating switches are provided in order to be able to switch the heating device on or off in different stages. These heating switches are in particular electromagnetic relays or semiconductor relays or other power electronics.

The at least one heating switch is preferably designed so that it is off in the de-energized state, i.e. when the second load circuit is switched off, and thus no longer supplies power to the associated heating element.

As mentioned, the circulation of the cleaning fluid can also be located in the second consumer group and thus in the second load circuit. This cleaning fluid is pumped or sprayed into the cooking chamber in particular using a corresponding pump. A circulation switch is preferably provided to deactivate this circulation. This circulation switch can, for example, switch off the associated pump or control a valve accordingly so that the cleaning fluid is no longer pumped into the cooking chamber. The circulation switch is preferably located in the second load circuit and is preferably designed so that it prevents the circulation of the cleaning fluid in the de-energized state.

In a simple embodiment, in which only the states "door open" and "door closed" have to be distinguished, it may be sufficient if the door switch arrangement includes a door switch.

In a preferred embodiment it is provided that the door switch arrangement comprises a first door switch and a second door switch. The two door switches are arranged offset from one another along the door gap, i.e. either on the door or on the housing; One of the two door switches is located in particular closer to the at least one door hinge. As a result, when the door is opened, one door switch that is further away from the door hinge reacts first and only later does the second door switch react, which means that it can be distinguished whether the door is only open a small gap or further. Furthermore, it is possible to easily change the stop side of the door, with one or the other door contact providing the relevant signal depending on the stop side.

By taking the door position into account, in particular by querying the two door switches, the electric motor of the fan arrangement can remain activated and hot air can therefore be expelled from the resulting door gap. Especially when switching from a hot recipe to sensitive foods, e.g. B. low-temperature cooking of fish, this is an advantage. There is no risk of the user coming into contact with the rotating fan wheel.

The door switch arrangement preferably comprises a door switch logic unit which correspondingly connects the switching states of the two door switches to one another. For example, this can be a simple logical connection that only... Power supply to the second consumer group is deactivated and/or the signal is sent to the blower load circuit switch when both door switches are open.

Both when using one door switch and when using the two door switches, these door switches can be designed as both non-contact and touch switches. For the design of the touching switch, for example, a spring-loaded pin can be arranged on the housing side or door side, which is pressed in by the door or the housing. The non-contact door switch can be designed, for example, as an optical switch or proximity switch.

In addition, it is also planned to detect the position of the door in another way. For example, a rotation angle sensor can be arranged in the area of the door hinges, which detects both the position of the door as part of the door switch arrangement.

As mentioned, the power supply is designed to be connected to an AC voltage network. It is preferably provided that the heating device is also designed for connection to this AC voltage network and in particular is not supplied with power via the power supply unit. In contrast, the blower arrangement is in particular not designed for connection to the AC voltage network, since the blower arrangement and in particular the electric motor are supplied with power via the blower load circuit and thus via the power supply.

The cooking appliance in particular has a connection cable that protrudes from the housing and can be connected to an AC voltage connection, in particular a 1-phase or 3-phase voltage connection, of a building. As an alternative to the connecting cable, a plug or a clamping device for connecting a corresponding connecting cable can also be provided in or on the housing of the cooking appliance. Inside the housing, the supplied alternating voltage is supplied to both the power supply and the heater.

The heating device preferably comprises a main contactor, which is supplied with the alternating voltage on the input side and is connected on the output side to the at least one heating switch, in particular to the plurality of heating switches. The at least one heating switch in turn switches the at least one heating element. In particular, a single-phase or three-phase supply of several heating elements is provided.

Accordingly, several heating switches are also provided in order to selectively switch the individual phases.

The main contactor is located in the housing of the cooking appliance, but outside the power supply.

A safety circuit is preferably provided. This safety circuit preferably has one or more safety temperature limiters that switch off the main contactor. Preferably, the safety circuit, in particular the safety temperature limiter(s), is supplied with power via the first load circuit.

Furthermore, it is preferably provided that the power supply is connected to the safety circuit and is designed to switch off the fan load circuit by means of the fan load circuit switch and/or the second load circuit by means of the second load circuit switch when the main contactor is switched off. It is particularly preferred that the first load circuit is not switched off when the main contactor is switched off. This means that at least basic functions, such as MMS, remain active. For example, the MMS can show that the main contactor was switched off due to a temperature that was too high.

Furthermore, it is preferably provided that the cooking appliance includes a device switch. This device switch is arranged in particular for actuation, in particular touch, by a user. The device switch is preferably located on the front of the cooking device; i.e. on the same side as the door of the cooking appliance.

The device switch is preferably connected directly or indirectly to the first load circuit switch for switching the first load circuit switch and/or directly or indirectly connected to the second load circuit switch for switching the second load circuit switch and/or for switching the fan load circuit -Switch connected directly or indirectly to the fan load circuit switch. The indirect connection takes into account in particular that the device switch is connected to a microcontroller in the power supply. The signal from the device switch can be evaluated in the microcontroller of the power supply. The microcontroller in turn is designed to control the respective load circuit switch depending on the signal from the device switch. In particular, a separate digital output of the microcontroller serves as the input of the load circuit switch(es) (hardware gate).

In particular, the device switch is designed to be set by the user into different, in particular more than two, switching positions. For example, the device switch can be switched into these different switching states by switching several times and/or by switching for longer periods and/or by a specific switching pattern. This makes it possible to selectively control the first load circuit switch and the fan load circuit switch and possibly also the second load circuit switch via the single device switch. This allows functions such as on/off, standby and reboot to be carried out. For example, when the cooking appliance is in the off state, all load circuits are switched off. For example, for standby mode, the first load circuit can remain switched on, with the other two load circuits (second load circuit and fan load circuit) being switched off. For a reboot, for example, it may be sufficient to briefly switch off the first load circuit and then switch it on again.

• Fig. 1 eine schematische Frontansicht eines erfindungsgemäßen Gargeräts gemäß einem Ausführungsbeispiel,
• Fig. 2 eine schematische Seitenansicht eines erfindungsgemäßen Gargeräts gemäß dem Ausführungsbeispiel, und
• Fig. 3 eine schematische Ansicht der Stromversorgung des erfindungsgemäßen Gargerätes gemäß dem Ausführungsbeispiel.

Further details, advantages and features of the present invention result from the following description of exemplary embodiments based on the drawing. It shows:

• Fig. 1 a schematic front view of a cooking appliance according to the invention according to an exemplary embodiment,
• Fig. 2 a schematic side view of a cooking appliance according to the invention according to the exemplary embodiment, and
• Fig. 3 a schematic view of the power supply of the cooking appliance according to the invention according to the exemplary embodiment.

The following is based on the Figures 1 to 3 an exemplary embodiment of a cooking appliance 1 is described in detail. This is a commercial cooking appliance 1, designed as a combination steamer, with which both steam cooking and hot air cooking are possible.

Before the principles of the present invention are discussed in detail, it should be emphasized that in the context of this application the term "cooking appliance" is understood to mean both commercial cooking appliances and household cooking appliances and, in general, food processing appliances that have both a cold as well as can carry out hot processing of food and can include, for example, combi steamers, combination steamers, beverage dispensers, beverage mixers, microwave devices and other food processing devices.

Figure 1 shows a purely schematic front view of the cooking appliance 1. Figure 2 shows a purely schematic side view of the cooking appliance 1. Accordingly, the cooking appliance 1 has a housing 2. A cooking space 3 is formed in the housing 2. This cooking space 3 is closed by a door 4. The door 4 is attached via door hinges 5 so that the door can be opened and closed.

There is a human-machine interface above the door 4, hereinafter referred to as MMS 6. This MMS 6 includes a display 7, in particular designed as a touch display. Furthermore, the MMS 6 can have one or more light displays 8 to display states of the cooking appliance 1. Furthermore, it is possible for the MMS 6 to include additional buttons or switches that can be operated accordingly by the user in order to control the cooking appliance 1.

In addition, the MMS 6 can be designed for voice control and accordingly include a microphone. Furthermore, it is provided that the MMS 6 comprises at least one camera, for example to recognize which foods are being inserted into the cooking appliance 1 and/or to monitor the cooking space 3, for example to detect the cooking status of the food or a need for cleaning in the cooking space 3 can be seen.

Furthermore, the cooking appliance 1 comprises a heating device 9. This heating device 9 in turn comprises a plurality of heating elements 10, which heat the cooking space 3 when the electricity is supplied accordingly. The heating device 9 further comprises a main contactor 11 and a plurality of heating switches 12, which are located between the main contactor 11 and the heating elements 10. The heating switches 12 are shown in the schematic representation in Figure 3 shown.

The cooking appliance 1 further comprises a fan arrangement 13. This fan arrangement 13 comprises an electric motor 14 for driving a fan wheel 16. Furthermore, the fan arrangement 13 can have motor electronics 15 (see Figure 3 ).

According to Figure 2 There is a power supply unit 30 in the housing 2 of the cooking appliance 1, as explained in the general part of the description. Both the power supply 30 and the main contactor 11 of the heating device 9 can be connected to an AC voltage connection 100 via a connecting cable 17.

Figure 3 shows a schematic view of the power supply of the cooking appliance 1. Shown is the power supply 30 with its power supply housing 42. Inside this power supply housing 42 is located an AC/DC converter 34, which is connected to the connecting cable 17. Furthermore, the power supply 30 can include an EMC filter 31 and a power monitoring module 32. This performance monitoring module 32 is connected to a performance monitoring bus 33. The performance monitoring bus 33 in turn can deliver data to another element of the cooking appliance 1, in particular to the MMS 6.

In addition, the schematic representation in Figure 3 that the power supply 30 includes a first load circuit connection 35, a second load circuit connection 36 and a fan load circuit connection 37. These connections 35, 36, 37 can be formed in or on the power supply housing 42. Furthermore, it is also possible for corresponding cables to lead out of the power supply housing 42 and for these cables to form the connections 35, 36, 37.

Each connection 35, 36, 37 is preferably protected by its own fuse 38 of the power supply unit 30.

The power supply 30, in particular in the power supply housing 42, comprises a first load circuit switch 39, a second load circuit switch 40 and a fan load circuit switch 41. The first load circuit connection 35 can be switched with the first load circuit switch 39. The second load circuit connection 36 can be switched with the second load circuit switch 40. The fan load circuit connection 37 can be switched with the fan load circuit switch 41.

The switches 39, 40, 41 in the power supply unit 30 are, in particular, semiconductor relay switches or electromagnetic relay switches. These switches 39, 40, 41 can also include corresponding switch logic, which makes it possible to process one or more input signals accordingly and to switch them accordingly depending on one or more input signals.

Figure 3 further illustrates that a first load circuit 50, a second load circuit 51 and a fan load circuit 52 are present in the cooking appliance. The first load circuit 50 is connected to the first load circuit connection 35. The second load circuit 51 is connected to the second load circuit connection 36. The blower load circuit 52 is connected to the blower load circuit connection 37.

In the upper area of Figure 3 a first consumer group 53 is shown. In this first consumer group 53 there is the MMS 6 and possibly other consumer elements 56, as was explained in the general part of the description.

The first consumer group 53 is primarily supplied with power by means of the first load circuit 50. However, due to legal requirements for example, it may be necessary to only arrange consumers with a maximum permissible total output in a load circuit. Therefore, within the scope of the present invention, it is preferably provided to assign at least one consumer element 56 to a consumer subgroup 55. This consumer subgroup 55 is supplied with power via the second load circuit 51. This makes it possible to distribute the different consumers to the two load circuits 50, 51, depending on their performance.

Furthermore, a second consumer group 54 is defined. This second consumer group 54 contains, in particular, consumers who are to be switched off when the door 4 is open, as was explained in detail in the general part of the description. Accordingly, the heating switches 12 are located in this second consumer group 54. In addition, a circulation switch 57 can also be located in the second consumer group 54, as explained in the general part of the description.

Furthermore, the second consumer group 54 can also include further consumer elements 56.

Figure 3 further illustrates the structure of a door switch arrangement 60. In the exemplary embodiment shown, this door switch arrangement 60 comprises a first door switch 61 and a second door switch 62. As shown in Figure 1 shows, the second door switch 62 is located closer to the door hinges 5. Both door switches 61, 62 react to a pivoting of the door 4, as was explained in the general part of the description.

The door switch arrangement 60 includes a door switch logic unit 63, for example designed as a simple logical link. In the exemplary embodiment shown, the two door switches 61, 62 are designed so that they enable a current flow in the activated state, i.e. when the door 4 is close enough to the respective door switch 61, 62 (in particular the door switch 61, 62 is pressed in). This is particularly relevant in accordance with Figure 1 shown arrangement of the door switches 62, which is located closer to the door hinge 5. Only when the door 4 is opened wide enough, in particular further than a gap of 50 mm, does the door switch arrangement 60 interrupt a power supply to the second consumer group 54 via the second load circuit 51.

The first door switch 61 is particularly relevant in order to be able to change the stop side of the door 4. If the door stop is moved from the right position shown (see Figure 1 ) changed to the left position so that the door hinges 5 are in relation to the illustration in Figure 1 are on the left, the first door switch 61 is relevant.

The dashed line between the second consumer group 54 and the first consumer group 53 makes it clear that the information about the position of the door 4, in particular "door open" and "door closed", also goes to consumers, in particular the MMS 6, of the first Consumer group 53 is transferable.

Furthermore, a dashed line shows in Figure 3 a connection of the door switch arrangement 60 to the blower load circuit switch 41. According to this schematic representation, it is possible to switch the blower load circuit switch 41 depending on the position of the door, as was explained in the general part of the description .

As already explained, the heating device 9 includes the main contactor 11, the multiple heating switches 12 and the multiple heating elements 10. Figure 3 shows purely schematically at the bottom left the heating switches 12 between the main contactor 11 and the heating elements 10. As part of the schematic representation, these heating switches 12 are also shown at the top right of the second consumer group 54, since the heating switches 12 of this second Consumer group 54 is assigned.

Figure 3 further illustrates a safety circuit 70 with one or more safety temperature limiters 71. The safety circuit 70 is connected to the first load circuit 50. By means of the safety circuit 70, a main contactor switch 72 can be switched in the main contactor 11 in order to isolate the heating device from the AC voltage connection 100. In particular, the second load circuit switch 40 and/or the fan load circuit switch are also connected to the safety circuit 70 at 41, so that these two switches 40, 41 can also be switched off when the main contactor switch 72 is switched off.

Figures 1 and 3 also show a device switch 80, which is as shown in Figure 1 located on the front of the cooking appliance 1. The device switch 80 is connected to the first load circuit switch 39, the second load circuit switch 40 and the fan load circuit switch 41 connected and can selectively switch these switches 39, 40, 41, as explained in the general part of the description.

It goes without saying that the power supply 30 shown can have additional load circuits. In particular, the second load circuit 51 with the associated second load circuit switch 40 is representative of further load circuits and further load circuit switches.

In addition to the above written description of the invention, reference is hereby made explicitly to the graphic representation of the invention in all figures for its additional disclosure.

Reference symbol list

1

cooking device

2

Housing

3

cooking space

4

door

5

Door hinges

6

Human-machine interface (MMS)

7

display

8th

Light indicators

9

Heating device

10

Heating elements

11

Main contactor

12

Heating switch

13

Fan arrangement

14

Electric motor

15

Engine electronics

16

impeller

17

Connection cable

30

power adapter

31

EMC filter

32

Performance monitoring module

33

Performance monitoring bus

34

AC/DC converter

35

first load circuit connection

36

second load circuit connection

37

Fan load circuit connection

38

Fuses

39

first load circuit switch

40

second load circuit switch

41

Blower load circuit switch

42

Power supply housing

50

first load circuit

51

second load circuit

52

Fan load circuit

53

first consumer group

54

second consumer group

55

Consumer subgroup

56

Consumer elements

57

Circulation switch

60

Door switch arrangement

61

first door switch

62

second door switch

63

Door switch logic unit

70

Safety circuit

71

Safety temperature limiter

72

Main contactor switch

80

Device switch

100

AC voltage connection

Claims (12)

Cooking appliance (1), in particular commercial cooking appliance, comprising • a housing (2), • a cooking space (3) in the housing (2) and a door (4) for closing the cooking space (3), • a heating device (9) for heating the cooking chamber (3), • a first consumer group (53) which is arranged in a first load circuit (50) for power supply, • a fan arrangement (13) with an electric motor (14) for generating circulating air in the cooking space (3), the fan arrangement (13) being arranged in a fan load circuit (52) for power supply, • and a power supply (30), wherein the first load circuit (50) is connected to a first load circuit connection (35) of the power supply (30) and wherein the fan load circuit (52) is connected to a fan load circuit connection (37) the power supply unit (30) is connected, • wherein the power supply (30) comprises a first load circuit switch (39) for switching the first load circuit (50) and a fan load circuit switch (41) for switching the fan load circuit (52). Cooking appliance according to claim 1, • wherein the first load circuit connection (35) and the fan load circuit connection (37), preferably all outgoing connections of the power supply, are designed for DC voltage load circuits, • and/or wherein the power supply unit (30) is designed on the input side for connection to an alternating voltage network, • and/or wherein the electric motor (14) of the fan arrangement (13) is a direct current motor. Cooking appliance according to one of the preceding claims, wherein the cooking appliance (1) comprises a door switch arrangement (60) which is designed to detect a position of the door (4), the door switch arrangement (60) being connected to the fan load circuit switch (41) is connected to switch the fan load circuit (52) depending on the position of the door (4). Cooking appliance according to claim 3, wherein the door switch arrangement (60) comprises at least a first door switch (61) and a second door switch (62), the two door switches (61, 62) being operable by opening and/or closing the door (4). are; in particular, one of the door switches being arranged closer to a door hinge (5) than the other door switch. Cooking appliance according to one of the preceding claims, comprising a second consumer group (54) which is arranged in a second load circuit (51) for power supply, the second load circuit (51) being connected to a second load circuit connection (36) of the power supply unit (30 ) is connected, and wherein the power supply (30) comprises a second load circuit switch (40) for switching the second load circuit (51). Cooking appliance according to one of claims 3 to 5, wherein the door switch arrangement (60) is arranged between the second load circuit connection (36) and the second consumer group (54), the door switch arrangement (60) being designed to depend on the detected position of the door (4) to switch off the second consumer group (54). Cooking appliance according to claim 5 or 6, comprising a circulation switch (57) for switching circulation of a cleaning fluid running through the cooking chamber (3), the circulation switch (57) being in the second consumer group (54). Cooking appliance according to one of the preceding claims, wherein the heating device (9) can be switched via at least one heating switch (12), the at least one heating switch (12) being in the second consumer group (54); in particular, wherein the at least one heating switch (12) switches off the heating device (9) in the de-energized state. Cooking appliance according to one of the preceding claims, wherein the heating device (9) is designed as an electrical heating device, in particular as an electrical resistance heating device, which can be connected via a main contactor (11), in particular arranged outside the power supply (30). Cooking appliance according to claim 9, wherein the main contactor (11) can be switched off via a safety circuit (70) with a safety temperature limiter (71); especially where that Power supply (30) is connected to the safety circuit (70) and is designed to switch off the fan load circuit (52) by means of the fan load circuit switch (41) and/or the second load circuit ( 51) by means of the second circuit switch (40). Cooking appliance according to claim 10, wherein the safety circuit (70) is supplied with power via the first load circuit (50). Cooking appliance according to one of the preceding claims, comprising a device switch (80), which is arranged in particular for operation by a user, the device switch (80) • is connected to the first load circuit switch (39) for switching the first load circuit switch (39), • and/or is connected to the second load circuit switch (40) for switching the second load circuit switch (40), • and/or for switching the fan load circuit switch (41) is connected to the fan load circuit switch (41).

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