DE102016109134B4 - Front cooking station - Google Patents

Abstract

Front cooking station (10) with: - a food preparation area (12), - an air cleaning device which comprises: + a duct system which has at least one suction opening (14, 16) for sucking in air contaminated with vapors from the food preparation and at least one Exhaust air opening (18, 20) for discharging air that has been sucked in and cleaned by the air cleaning device into the surrounding area (22) of the front cooking station (10), + at least one fan (24, 26) that draws the air from the at least one Suction opening (14, 16) to which at least one exhaust air opening (18, 20) conveys, + at least one grease filter (28, 30) which is arranged in the duct system, + at least one odor filter (32, 34) which is arranged in the duct system - an extinguishing device which comprises: + at least one extinguishing agent nozzle (36-42) assigned to the food preparation area (12), + at least one extinguishing agent nozzle (44, 46) assigned to the grease filter (28, 30), + at least one temperature sensor (56- 74) for the detection of overheating and / or a fire, the front-cooking station (10) having a first holder (76) for an extinguishing agent tank (78) and a pipeline system (80, 82) which extends from the area in which the first holder (76) is provided, leads to the extinguishing agent nozzles (36-54), characterized in that the at least one exhaust air opening (18, 20) is arranged in the bottom of the front cooking station (10), that the duct system has an exhaust air box forms, in the bottom of which the at least one exhaust air opening (18, 20) is provided, that the at least one fan (24, 26) is connected upstream of the exhaust air box, and that the at least one fan (24, 26) has at least one extinguishing agent nozzle (48, 50 ) assigned.

Description

The present invention relates to a front cooking station according to the preamble of claim 1.

Front cooking stations are used in the hotel and catering industry to prepare meals directly in front of the guest. As a rule, such front cooking stations are mobile and, for example, equipped with wheels to facilitate transport. In some front cooking stations, the thermal devices used for food preparation are permanently installed, while it is becoming increasingly common for the front cooking stations to be variably equipped with different types of thermal devices. Such thermal devices can include, for example, hobs, grill plates, wok inserts or deep fryers, the suitable combination of thermal devices being selected as a function of the food that is to be prepared.

Since front cooking stations are usually not used in the kitchen but, for example, in the serving area, where there are usually no permanently installed exhaust systems, the air cleaning devices that the front cooking stations themselves have are becoming increasingly important. Because the guest should be able to observe the cooking process, but should not be burdened with odors or fatty vapors as much as possible. As a rule, the air cleaning devices for front cooking stations are systems that extract the air laden with fumes, clean it and then return it to the area surrounding the front cooking station.

Even if the grease filters, which usually form a component of the air cleaning device and which are usually arranged adjacent to the suction opening, are cleaned regularly, it cannot be avoided that grease deposits stick to the grease filters. Such fat deposits are easily flammable, which is why in the worst case it can happen that these fat deposits catch fire, for example when flames are sucked in by the air cleaning device and reach the fat filters when cooking food.

For this reason, for example, the CN 102 062 430 A is already planning to equip the front cooking station with an automatic extinguishing device, which has an extinguishing agent nozzle directed towards the food preparation area and a temperature sensor that is structurally combined with the extinguishing agent nozzle to detect overheating or a fire. The extinguishing agent nozzle and the temperature sensor are arranged above the food preparation area on a side wall of the front cooking station, the extinguishing device extending in sections through the side wall to provide a transfer point on the outside of the front cooking station. A source of extinguishing agent can be connected to this transfer point, it being stated in the cited publication that the extinguishing agent can be, for example, water or an extinguishing powder. While it is still understandable that, for example, a pressurized water hose can represent a suitable source of extinguishing agent, can be found in the CN 102 062 430 A not specified, 102 062 430 A how a suitable extinguishing powder source could be designed.

Apart from that, it is the one from the CN 102 062 A known front cooking station, it is not unlikely that no extinguishing agent source is connected to the transfer point, for example because there is no water connection for a water hose at the location of the front cooking station or because there is simply no connection to a suitable source for reasons of time. It is clear that without an extinguishing agent source connected to the transfer point, no automatic extinguishing process can be triggered in the event of a fire, which represents a considerable safety risk. Because a possible fire can spread very quickly in this case.

The following publications also relate to the field of the invention or are at least related to it: DE 690 09 649 T2 , U.S. 4,854,949 A , DE 10 2011 082 924 A1 , DE 100 04 558 A1 , DE 10 2011 105 597 A1 and DE 20 2005 002 589 U1 .

the DE 690 09 649 T2 relates to a hood without a flue for a deep fryer. In the U.S. 4,854,949 A a device for cooking food, in particular for deep-frying, is described which comprises a container for holding oil in which the food is fried, and means for heating the oil and controlling the oil temperature to a level suitable for frying. the DE 10 2011 082 924 A1 describes an extractor device which comprises at least one extractor hood and at least one air preparation device. In the DE 100 04 558 A1 describes a filter device for cooking vapors on hotplates with a strong odor. the DE 10 2011 105 597 A1 relates to a cooking appliance with a cooking chamber and at least one fire sensor, with which a control can detect a fire in the cooking appliance, and a method for controlling a cooking appliance. An air collection device and an exhaust box will be in the DE 20 2005 002 589 U1 described.

From the WO 2007/040 457 A1 a free-standing deep-frying station is known which has an opaque high-rise rear and which is therefore relatively unsuitable as a front cooking station. Apart from this, however, this document discloses the further features of the preamble of claim 1. Proceeding from this prior art, the invention is based on the object that is derived from WO 2007/040 457 A1 to further improve known fire-fighting options and at the same time make them usable for use in a real front cooking station.

This object is achieved by a front cooking station with the features of claim 1.

Because the at least one exhaust air opening is arranged in the bottom of the front cooking station, that the duct system forms an exhaust air box, in the bottom of which the at least one exhaust air opening is provided, and that the at least one fan is connected upstream of the exhaust air box, the majority of the The air purification device has been relocated to the area below the working level and the guest's view of the working level can be kept free to ensure an optimal front-cooking experience. Since at least one extinguishing agent nozzle of its own is assigned to the at least one fan, it is also possible to effectively fight very rare but not completely ruled out fan fires.

Because the front cooking station has a first holder for an extinguishing agent tank and a pipeline system that leads from the area in which the first holder is provided to the at least one extinguishing agent nozzle, the front cooking station is in terms of the from the CN 102 062 430 A known teaching prepared to always be equipped with its own self-sufficient extinguishing agent source, so that the extinguishing agent tank can remain connected even when the front cooking station is moved. This ensures that the extinguishing device is always ready for use when the front cooking station is in operation. It is conceivable to provide a suitable sensor system that determines whether a suitable extinguishing agent tank is connected, whereby a control device of the front cooking station can prevent the operation of the at least one fan (and possibly the thermal devices used for food preparation) if the Sensors report that no suitable extinguishing agent tank is connected.

Advantageous refinements and developments of the invention emerge from the subclaims.

In preferred embodiments of the front cooking station according to the invention, it is provided that the first holder is provided in an area which is protected by a flame arrester both from the food preparation area and from the duct system. In this context, flame arrestors are less to be understood as the measures known from classic explosion protection, but rather it is sufficient to provide the first holder and thus the extinguishing agent tank in an area that is sufficiently sealed off from potential fire sources, for example by means of flame-retardant material such as sheet metal or similar.

It is considered particularly advantageous in this context that the flame arrester is formed by a separate compartment. A separate compartment is to be understood here as any compartment that is not part of fire-endangered sections of the front cooking station because, for example, a compartment belonging to the channel system would be unsuitable for providing the first holder.

It is preferred that the separate compartment is a compartment that is closed in the operating state of the front cooking station. For example, a compartment made of sheet metal walls provides adequate flame arrestor.

It is also preferred in this context that the separate compartment is provided in an outer side area of the front cooking station. If the compartment is arranged in a side area of the front cooking station, a closed inspection opening of the compartment can form part of the side wall of the front cooking station, so that the compartment is easily accessible, for example, to replace the extinguishing agent tank. In addition, the compartment and thus the extinguishing agent tank housed therein have the maximum possible distance from potential fire sources with this arrangement.

With regard to the arrangement of the extinguishing agent nozzles, it is preferred that a plurality of extinguishing agent nozzles is assigned to the food preparation area. The spray angle of the extinguishing agent nozzle or nozzles is preferably selected so that the entire food preparation area is covered.

It is also preferred in this context that the air cleaning device has two fans and that an extinguishing agent nozzle is assigned to each fan. This solution is advantageous because ultimately every electric motor represents a potential source of fire, so that in an extremely unlikely but not completely ruled out case, a fan could catch fire due to overheating.

Furthermore, in connection with the arrangement of the extinguishing agent nozzles, it is considered to be particularly advantageous that an extinguishing agent nozzle is assigned to each grease filter. This measure is advantageous because, for example, when cooking food for a short period of time, it can happen that flames are sucked through the grease filters and ignite these or the grease deposited on them.

Finally, in connection with the arrangement of the extinguishing agent nozzles, it is considered advantageous that at least one extinguishing agent nozzle is assigned to the at least one odor filter. This measure makes sense because, for example, a fan fire can lead to the odor filter usually arranged behind the fan being set on fire.

According to a particularly preferred development of the front cooking station according to the invention, it is provided that the at least one exhaust air opening is equipped with a closure device. With this measure, the at least one exhaust air opening can be closed in the event of a fire in the duct system of the front cooking station, so that it can be ruled out that flames can escape from the at least one exhaust air opening and, in the worst case, spread of the fire in the area surrounding the front -Cooking station lead.

In this context it is conceivable, for example, that the closure device comprises a grid with lamellas which can be brought into a closed position by a drive device. The lamellae are preferably mounted so as to be rotatable about their longitudinal axis. The actuation or rotation of the lamellae can then be carried out by a drive device in the form of a cylinder, to which, if necessary, a propellant gas is applied.

The security can be further increased in that the extinguishing device automatically activates the closure device in the event of overheating and / or a fire in order to close the at least one exhaust air opening. For example, it is conceivable that the cylinder or cylinders of the drive device are automatically acted upon with a propellant gas when the at least one temperature sensor detects overheating and / or a fire.

According to a further advantageous development of the invention it is provided that the extinguishing device has a manual actuating device with which the extinguishing device can be actuated independently of the fact that the at least one temperature sensor detects overheating and / or a fire. By this measure, the extinguishing device can also be operated, for example, when the front cooking station is not yet connected to the power supply, which will be necessary for the proper operation of the at least one temperature sensor, and there is still a fire in the Area of the front cooking station, for example because a container with burning fat is placed on the front cooking station.

At least in some cases it is considered advantageous for the front cooking station according to the invention that it has a second holder for an extinguishing agent propellant tank. If the extinguishing agent and the propellant are stored in different tanks, it is possible, for example, to remove the usually smaller propellant tank when transporting the front cooking station for a longer period and to transport it separately. Furthermore, the extinguishing agent and the propellant in the form of propellant gas, for example, can have a different shelf life or the tanks can be subject to different inspection intervals, so that it is more cost-effective to only replace the agent that is just being replaced.

According to a further basic idea of the present invention, the front-cooking station according to the invention is further developed in that it has a sensor arrangement with at least one pressure sensor, which can detect and report the pressure in front of the at least one fat and / or odor filter, based on the air flow direction, that it has a control device for controlling at least the air purification device, that the control device concludes that there is a missing, defective and / or incorrectly installed grease and / or odor filter when the pressure sensor delivers a value that is below a predetermined pressure threshold value, and / or if a difference between the value supplied by the pressure sensor and a further pressure value is less than a predetermined pressure difference threshold value, and that the control device prevents the operation of the at least one fan after it has detected a missing, defective and / or incorrectly installed grease - and / or he has closed the odor filter. Providing a pressure sensor in front of a filter is basically known, for example from US Pat U.S. 5,133,786 A , according to which a pressure sensor is provided in an exhaust air box, which receives a plurality of odor filter mats, which are arranged in front of an exhaust air opening. In this known case, the pressure sensor is used to determine an overpressure in the exhaust air box, which allows conclusions to be drawn about clogged filter mats. Although it is not ruled out that the pressure sensor provided according to the invention is also used for this purpose, the main purpose is a different one, namely the detection of a missing, defective and / or incorrectly installed grease and / or odor filter via too low a pressure before the Filter.

In this context, a further development of the front cooking station according to the invention provides that the sensor arrangement has at least one further pressure sensor which, based on the air flow direction, can detect and report the pressure behind the at least one fat and / or odor filter, the pressure difference being output the pressure in front of and behind the at least one fat and / or odor filter is formed. For example, in the case of an odor filter, the pressure inside an exhaust air box accommodating the odor filter can be compared with the pressure in the area surrounding the front cooking station, so that changes in the ambient pressure can be taken into account, which is a particularly precise monitoring option.

According to another development of the invention, it is provided that the sensor arrangement has at least one position sensor which can detect and report the correct installation position of the at least one grease and / or odor filter, the control device preventing the operation of the at least one fan when the at least one The position sensor reports that the at least one grease and / or odor filter is not installed correctly. For example, an incorrectly installed grease filter can lead to an excessive amount of grease being deposited in the channel system, which is undesirable for both hygienic and fire protection reasons and which can be prevented by this measure.

In this context, it is considered particularly advantageous that the sensor arrangement has further position sensors that can detect and report the correct installation positions of all parts of the front cooking station whose position has to be changed to remove the at least one fat and / or odor filter . It cannot be ruled out that the filter itself is inserted correctly, but the incorrect (re) installation of other parts means that the front cooking station cannot still be operated properly.

Similarly, it is preferred for the front cooking station according to the invention that it has at least one inspection door and that the sensor arrangement has at least one locking sensor that can detect and report correct locking of the at least one inspection door, the control device operating the at least one The blower is prevented when the at least one locking sensor reports that the at least one inspection door is not properly closed. Inspection doors that are not closed can, for example, result in the sucked air escaping from the front cooking station without having passed the odor filter. This state can be avoided if the control device only allows operation of the at least one fan when all inspection doors are correctly closed.

An exemplary embodiment of the invention is explained below by way of example with reference to the accompanying drawings.

• 1 eine perspektivische Darstellung einer Ausführungsform der erfindungsgemäßen Front-Cooking-Station;
• 2 eine perspektivische Darstellung der Front-Cooking-Station von 1 mit abgenommenen Türen;
• 3 eine Vorderansicht der Front-Cooking-Station von 1;
• 4 eine Vorderansicht der Front-Cooking-Station von 1 mit abgenommenen Türen;
• 5 eine Ansicht der rechten Seite der Front-Cooking-Station von 1;
• 6 eine Ansicht der rechten Seite der Front-Cooking-Station von 1 mit abgenommener Seitentür;
• 7 eine Ansicht der linken Seite der Front-Cooking-Station von 1;
• 8 eine Ansicht der linken Seite der Front-Cooking-Station von 1 mit abgenommener Seitentür;
• 9 eine perspektivische Darstellung der Front-Cooking-Station von 1, teilweise geschnitten;
• 10 das Detail B von 9;
• 11 eine perspektivische Darstellung der auf dem Kopf stehenden Front-Cooking-Station von 1; und
• 12 das Detail A von 11.

Show it:

• 1 a perspective view of an embodiment of the front cooking station according to the invention;
• 2 a perspective view of the front cooking station of 1 with doors removed;
• 3 a front view of the front cooking station of 1 ;
• 4th a front view of the front cooking station of 1 with doors removed;
• 5 a view of the right side of the front cooking station from 1 ;
• 6th a view of the right side of the front cooking station from 1 with side door removed;
• 7th a view of the left side of the front cooking station from 1 ;
• 8th a view of the left side of the front cooking station from 1 with side door removed;
• 9 a perspective view of the front cooking station of 1 , partially cut;
• 10 the detail B of 9 ;
• 11 a perspective view of the upside down front cooking station from 1 ; and
• 12th the detail A of 11 .

Since the 1 until 12th show the same embodiment of the front cooking station according to the invention, these are described together below. It should be noted that not all elements are provided with reference symbols in all figures, but only those elements that can be easily recognized.

The illustrated front cooking station 10 has a food preparation area 12th which is intended to be equipped with suitable thermal devices, for example with hobs, grill plates, deep fryers, woks or pasta cookers and corresponding combinations. Although gas-powered thermal devices can also be used, electrically-powered thermal devices are preferred. The product group called "Varithek" from Rieber GmbH & Co. KG, for example, provides a wide range of suitable devices.

The front cooking station 10 has an air cleaning device which, in the case shown, comprises two duct systems, namely a left duct system and a right duct system. The left canal system leads from a left over the food preparation area 12th located first suction opening 14th to a first exhaust opening 18th in the floor of the front cooking station 10 . The left channel system forms a first exhaust air box with a relatively large volume, in the bottom of which the first exhaust air opening 18th is provided. In the case shown is the first exhaust opening 18th significantly larger than the first suction opening 14th , which has the consequence that the outflow velocity from the first exhaust air opening 18th exiting air is significantly lower than the inflow velocity into the first intake opening 14th is. This is advantageous because high exit velocities increase the comfort for people in the surrounding area 22nd the front cooking station 10 stop, impair. In addition, it can escape too quickly from the exhaust vent 18th escaping air can lead to dust in the surrounding area, for example 22nd the front cooking station 10 is whirled up and possibly gets into the food.

The duct system on the right leads from a second suction opening, which is practically identical or mirror-symmetrical 16 right above the food preparation area 12th is provided to a second exhaust opening 20th that are in the bottom of the front cooking station 10 or a right exhaust air box formed by the right duct system is provided. Via the suction openings 14th , 16 Air contaminated with vapors is sucked in through the preparation of food, then cleaned and returned to the surrounding area 22nd the front cooking station 10 to be guided.

To get the air from the intake ports 14th , 16 to the exhaust air openings 18th , 20th to promote are a first fan in the illustrated case 24 and a second fan 26th intended. The left or first fan 24 is upstream of the left exhaust air box and is therefore arranged in the duct system, as in the 2 and 4th can be seen in which the duct system is shown partially cut in the fan area. The second or right fan 26th is installed accordingly in the right duct system.

There is a first grease filter in the left channel system 28 provided, while in the right channel system a second grease filter 30th is installed, which cannot be seen in the figures and is therefore only indicated schematically. The grease filters 28 , 30th are immediately behind the suction openings 14th , 16 arranged so that only a small part of the sewer system is contaminated with grease.

The two exhaust vents 18th , 20th are with odor filters 32 , 34 covered, which can be, for example, activated carbon filters.

The fact that in the case shown there is a left duct system and a right duct system, each with its own fan 24 , 26th are provided is due to the fact that the front cooking station shown 10 there is a very wide front cooking station, which for example has three thermal devices 132 , 134 , 136 (in 3 indicated). Particularly in cases in which the front cooking station is less wide, for example a front cooking station that can only accommodate one or two thermal devices, it is often sufficient to provide only one duct system with only one fan .

The illustrated front cooking station 10 has an extinguishing device that has a plurality of extinguishing agent nozzles 36 to 54 and a variety of temperature sensors 56 to 74 for the detection of overheating and / or a fire. At least in some cases, the temperature sensors can be structurally combined with the extinguishing agent nozzles. However, it is also conceivable to provide at least some of the temperature sensors independently of any extinguishing agent nozzles. In the case shown, they are in the food preparation area 12th four extinguishing agent nozzles 36 to 42 assigned. A temperature sensor is provided adjacent to these extinguishing agent nozzles, so that above the food preparation area 12th also four temperature sensors 56 to 62 are provided.

Each of the fans 24 , 26th is an extinguishing agent nozzle 48 respectively 50 assigned, with two corresponding temperature sensors 68 and 70 are intended to prevent overheating or Fires in the area of the fan 24 , 26th to be able to detect.

Also each is the grease filter 28 , 30th an extinguishing agent nozzle 44 respectively 46 and a temperature sensor 64 respectively 66 assigned to, for example, through the grease filter 28 , 30th to be able to detect sucked flames.

Finally, it is also in the area of the odor filter 32 and 34 one extinguishing agent nozzle each 52 , 54 and a temperature sensor 72 , 74 intended.

In one on the right side of the front cooking station 10 provided compartment that is closed during normal operation 88 is a first bracket 76 for an extinguishing agent tank 78 intended. The extinguishing agent tank 78 can contain, for example, an extinguishing agent in powder form, although liquid or foam-form extinguishing agents are of course also possible in principle. That in normal operation of the front cooking station 10 closed compartment 88 has a top 84 and a left side wall 86 that fulfill the function of a flame arrester. The provision of such a flame arrester is also advantageous in cases in which the first holder 76 not in a separate compartment 88 is arranged.

In the case shown, a pipeline system only leads parts, namely a section 80 in 6th and a section 82 in 8th are shown from the extinguishing agent tank 78 to the large number of extinguishing agent nozzles 36 to 54 .

In the subject 88 is a second bracket 102 for an extinguishing agent propellant tank 104 intended. The propellant can be, for example, pressurized nitrogen which, if necessary, is used in the extinguishing agent tank 78 contained powder from the extinguishing agent nozzles 36 to 54 to flow out.

The extinguishing device can also be operated manually, to be precise via a manual operating device 100 which, for example, can be designed purely mechanically so that when a handle is pulled out, the valve of the extinguishing agent propellant tank mechanically coupled to it 104 is opened.

The illustrated front cooking station 10 has a locking device 90 with which the two exhaust air openings 18th , 20th can be locked in case of fire. For this purpose, the closure device comprises in each case a grid with lamellae that can be rotated about their longitudinal axis 92 , 94 . Every exhaust vent 18th , 20th is a drive device 96 , 98 assigned to the slats 92 , 94 if necessary, turn it so that the exhaust air openings 18th , 20th getting closed. In this way, it can be safely avoided that flames from the exhaust air openings in the event of a fire 18th , 20th beat. The influx of oxygen that could ignite a fire is also prevented or at least reduced.

The illustrated front cooking station 10 has a sensor arrangement which has a first pressure sensor 106 , a second pressure sensor 108 , a third pressure sensor 110 , a fourth pressure sensor 112 , a first position sensor 116 , a second position sensor 118 , a third position sensor 120 , a fourth position sensor 122 , a first locking sensor 128 and a second locking sensor 130 includes. These sensors are available with a control device 114 in connection with the operation of at least the blower 24 , 26th , but preferably controls and / or regulates at least the entire air cleaning device.

In the case shown is the first pressure sensor 106 in the left exhaust air box and thus in relation to the direction of flow in front of the first odor filter 32 arranged while the second pressure sensor 108 in a corresponding manner to the second odor filter 34 is upstream. A third pressure sensor 110 In the case shown, measures the ambient pressure in the area of the first exhaust air opening 18th while a fourth pressure sensor 112 the ambient pressure in the area of the second exhaust air opening 20th recorded. As a rule, the ambient pressure should be in the area of the two exhaust air openings 18th , 20th be at least almost identical, so that if necessary on one of the pressure sensors 110 , 112 can be dispensed with. About the pressure sensors 106 until 112 can be determined whether the odor filter 32 , 34 are installed correctly and work as expected. Because missing, defective and / or incorrectly installed odor filters 32 , 34 result in the pressure in the exhaust boxes being lower than expected. With correctly working odor filters 32 , 34 This is the case after the fan has started up for a short time 24 , 26th a pressure difference between the higher pressures in the exhaust air boxes and the ambient pressure. If this pressure difference is smaller than expected, it can be assumed that the corresponding odor filter 32 , 34 not working properly. In addition, pressure sensors connected upstream of the respective filters can also be used to detect clogged filters, because this then results in a higher pressure than in the normal state.

In the illustrated embodiment of the front cooking station according to the invention 10 it is also provided that the correct installation position of all parts required for removing the grease filter 28 , 30th must be dismantled or at least moved, is monitored. For this purpose is the first grease filter 28 a first position sensor 116 assigned, which can be, for example, a magnetic switch. The grease filter 28 can then wear a magnet that only works when the grease filter is correctly inserted 28 leads to the fact that the first position sensor 116 supplies a positive signal in the form of the magnetic switch.

The second grease filter can be used in the same way 30th a second position sensor 118 be assigned. The third position sensor 120 and the fourth position sensor 122 serve in the illustrated case to ensure the correct position of the grease filters 28 , 30th to detect laterally shielding sheets, with in 9 At least it can be seen that the left sheet metal around the grease filter is missing there 28 to be able to take out.

With the illustrated front cooking station 10 is the left exhaust box with a first inspection door 124 locked, while the right exhaust box with a second inspection door 126 is locked. These inspection doors 124 , 126 can either be opened or removed, for example to use the odor filter 32 , 34 can be found. The first inspection door 124 is a first locking sensor 128 assigned, during the second inspection door 126 a second locking sensor 130 assigned. Even with the locking sensors 128 , 130 it can be a magnetic switch, for example.

The control device 114 allows continuous operation of the fan 24 , 26th only if all elements are correctly installed and work as expected. With continuous operation of the fan 24 , 26th In this context it is to be understood that it is necessary to check the odor filter 32 , 34 by means of pressure monitoring or pressure difference formation is required, the fan 24 , 26th to run at least until the expected pressure or the expected pressure difference should normally have built up.

Although two fans and two separate duct systems are provided in the illustrated case, this does not necessarily have to be the case, as mentioned, but solutions in which only one duct system and only one fan are used can certainly be considered.

The features of the invention disclosed in the above description, in the drawings and in the claims can be essential for realizing the invention both individually and in any combination.

List of reference symbols

10

Front cooking station

12th

Food preparation area

14th

First suction opening

16

Second suction opening

18th

First exhaust opening

20th

Second exhaust air opening

22nd

Surrounding area

24

First blower

26th

Second blower

28

First grease filter

30th

Second grease filter

32

First odor filter

34

Second odor filter

36-54

Extinguishing agent nozzles

56-74

Temperature sensors

76

First bracket

78

Extinguishing agent tank

80, 82

Piping system

84.86

Top side, flame arrester, left side wall, flame arrester

88

subject

90

Locking device

92

First slats

94

Second slats

96

First drive device

98

Second drive device

100

Manual actuator

102

Second bracket

104

Extinguishing agent propellant tank

106

First pressure sensor

108

Second pressure sensor

110

Third pressure sensor

112

Fourth pressure sensor

114

Control device

116

First position sensor

118

Second position sensor

120

Third position sensor

122

Fourth position sensor

124

First inspection door

126

Second inspection door

128

First locking sensor

130

Second locking sensor

132

First thermal device

134

Second thermal device

136

Third thermal device

Claims (19)

Front-cooking station (10) with: - a food preparation area (12), - an air cleaning device which comprises: + a duct system which has at least one suction opening (14, 16) for sucking in air contaminated with vapors by the food preparation and at least one Exhaust air opening (18, 20) for discharging air that has been sucked in and cleaned by the air cleaning device into the surrounding area (22) of the front cooking station (10), + at least one fan (24, 26) that draws the air from the at least one Suction opening (14, 16) to which at least one exhaust air opening (18, 20) conveys, + at least one grease filter (28, 30) which is arranged in the duct system, + at least one odor filter (32, 34) which is arranged in the duct system - an extinguishing device comprising: + at least one extinguishing agent nozzle (36-42) assigned to the food preparation area (12), + at least one extinguishing agent nozzle (44, 46) assigned to the grease filter (28, 30), + at least one temperature sensor or (56-74) for the detection of overheating and / or a fire, the front cooking station (10) having a first holder (76) for an extinguishing agent tank (78) and a pipeline system (80, 82), which is provided by the area in which the first holder (76) is provided leads to the extinguishing agent nozzles (36-54), characterized in that the at least one exhaust air opening (18, 20) is arranged in the bottom of the front cooking station (10) that the duct system forms an exhaust air box, in the bottom of which the at least one exhaust air opening (18, 20) is provided, that the at least one fan (24, 26) is connected upstream of the exhaust air box, and that the at least one fan (24, 26) is at least an extinguishing agent nozzle (48, 50) is assigned. Front cooking station (10) Claim 1 , characterized in that the first holder (76) is provided in an area which is protected both from the food preparation area (12) and from the duct system by a flame arrester (84, 86). Front cooking station (10) Claim 2 , characterized in that the flame arrester (84, 86) is formed by a separate compartment (88). Front cooking station (10) Claim 3 , characterized in that the separate compartment (88) is a compartment which is closed in the operating state of the front cooking station (10). Front cooking station (10) Claim 3 or 4th , characterized in that the separate compartment (88) is provided in an outer side area of the front cooking station (10). Front cooking station (10) according to one of the preceding claims, characterized in that a plurality of extinguishing agent nozzles (36-42) is assigned to the food preparation area (12). Front cooking station (10) according to one of the preceding claims, characterized in that the air cleaning device has two fans (24, 26) and that an extinguishing agent nozzle (48, 50) is assigned to each fan (24, 26). Front cooking station (10) according to one of the preceding claims, characterized in that an extinguishing agent nozzle (44, 46) is assigned to each grease filter (28, 30). Front cooking station (10) according to one of the preceding claims, characterized in that at least one extinguishing agent nozzle (52, 54) is assigned to the at least one odor filter (32, 34). Front cooking station (10) according to one of the preceding claims, characterized in that the at least one exhaust air opening (18, 20) is equipped with a closure device (90). Front cooking station (10) Claim 10 , characterized in that the closure device (90) comprises a grid with lamellae (92, 94) which can be brought into a closed position by a drive device (96, 98). Front cooking station (10) Claim 10 or 11 , characterized in that the extinguishing device automatically activates the closing device (90) in the event of overheating and / or a fire in order to close the at least one exhaust air opening (18, 20). Front cooking station (10) according to one of the preceding claims, characterized in that the extinguishing device has a manual actuating device (100) with which the extinguishing device can be actuated independently of the fact that the at least one temperature sensor (56-74) is overheating and / or a fire is detected. Front cooking station (10) according to one of the preceding claims, characterized characterized in that it has a second holder (102) for an extinguishing agent propellant tank (104). Front cooking station (10) according to one of the preceding claims, characterized in that it has a sensor arrangement with at least one pressure sensor (106, 108) which, based on the air flow direction, measures the pressure in front of the at least one fat (28, 30) and / or odor filter (32, 34) can detect and report that it has a control device (114) for controlling at least the air purification device, that the control device (114) checks for a missing, defective and / or incorrectly installed grease (28, 30) and / or odor filter (32, 34) closes when the pressure sensor (106, 108) delivers a value that is below a predetermined pressure threshold value, and / or when a difference from the pressure sensor (106, 108) delivered value and a further pressure value is smaller than a predetermined pressure difference threshold value, and that the control device (114) prevents the operation of the at least one fan (24, 26) after it has responded to ei NEN missing, defective and / or incorrectly installed grease (28, 30) and / or odor filter (32, 34) has closed. Front cooking station (10) Claim 15 , characterized in that the sensor arrangement has at least one further pressure sensor (110, 112) which, based on the air flow direction, can detect and report the pressure behind the at least one fat (28, 30) and / or odor filter (32, 34), wherein the pressure difference is formed from the pressure upstream and downstream of the at least one fat (28, 30) and / or odor filter (32, 34). Front cooking station (10) Claim 15 or 16 , characterized in that the sensor arrangement has at least one position sensor (116, 118) which can detect and report the correct installation position of the at least one grease (28, 30) and / or odor filter (32, 34), the control device (114 ) prevents the operation of the at least one fan (24, 26) when the at least one position sensor (116, 118) reports that the at least one fat (28, 30) and / or odor filter (32, 34) is not installed correctly . Front cooking station (10) Claim 17 , characterized in that the sensor arrangement has further position sensors (120, 122) which can detect and report the correct installation positions of all parts of the front cooking station (10), their position for removing the at least one fat (28, 30) and / or odor filter (32, 34) has to be changed. Front cooking station (10) after one of the Claims 15 until 18th , characterized in that it has at least one inspection door (124, 126), that the sensor arrangement has at least one locking sensor (128, 130) which can detect and report correct locking of the at least one inspection door (124, 126), the control device (114) prevents the operation of the at least one fan (24, 26) when the at least one locking sensor (128, 130) reports that the at least one inspection door (124, 126) is not properly closed.

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