EP3745866A1

EP3745866A1 - Oven and method for producing baked products

Info

Publication number: EP3745866A1
Application number: EP19701230.5A
Authority: EP
Inventors: Markus BIBARIC
Original assignee: Haas Food Equipment GmbH
Current assignee: Haas Food Equipment GmbH
Priority date: 2018-01-31
Filing date: 2019-01-23
Publication date: 2020-12-09
Also published as: CN111669973A; WO2019149595A1; EP3520617A1

Abstract

The invention relates to a method and an oven for producing baked, preferably edible, products, comprising an endless conveyor (1) running along a longitudinal direction (18) and a plurality of openable and closable baking irons (2) provided along the endless conveyor (1), a plurality of heating modules (10, 11, 13) (8) in the form of radiant heater devices being arranged between a first convection blower outlet (16) and an extractor (15) viewed along the longitudinal direction (18), and a second convection blower outlet (12) being provided, viewed along the longitudinal direction (18), between a first heating module (10) and a second heating module (11), for generating a convection flow (9) running along the longitudinal direction (18) to the extractor (15).

Description

Oven and method of making baked products

The invention relates to an oven and a method according to the preambles of the independent claims.

Generic ovens are known and published in different versions. The device according to the invention preferably relates to an industrial oven for the production of baked products, such as an oven for the production of flat wafers or hollow waffles.

Such furnaces are designed, for example, as so-called baking tongs machines. These special ovens are up and down along an endless conveyor

provided zuklappbare baking tongs, which in each case form a baking mold in particular in its closed position. The baking tongs are usually conveyed continuously through the oven along the endless conveyor. In this case, a baking compound is applied to an unfolded baking tongs. Then the baking tongs

closed, locked and transported through the hot oven. Subsequently, the baked product is conveyed through the oven in the closed baking tongs and baked there. Then the baking tongs are opened so that the baked product can be removed. Subsequently, the cycle begins again. The market now has a demand for ovens for the industrial production of bakery products whose efficiency, in particular their energy efficiency, is improved. Up to now, an improvement in energy efficiency has been achieved, for example, by making the baking chamber largely closed. As a result, the heat losses could be reduced. Other measures to increase the efficiency are, for example, the use of radiant heaters or the control of the incoming or outgoing air.

Radiant heaters or radiant burners are devices in which a fuel-air mixture, for example in a porous body, preferably in a porous metal or ceramic body, in particular in a metal mesh, a wire mesh or in a metal mesh, is burned substantially free of flames.

With a combination of closed oven and efficient heater, there may be incidences that operate mostly exclusively with primary air

Radiant heaters generate too little gas or air flow, which is not given sufficient flow through the oven.

To solve this problem ovens are known with a substantially closed oven, in which for heating the oven

Radiant heaters are used, and in which a convection fan is provided to generate a sufficient convection flow. For the derivation of the baking chamber gases and convection a trigger is provided which opens into the oven or branches off from the oven. For efficient utilization of the heat energy, the confluence of the convection fan outlet, then the heating arrangement and then the trigger are arranged along the longitudinal direction of the baking chamber. The vent and the convection fan outlet are preferably located on opposite sides of the baking chamber. Between the outlet and the convection fan outlet, the radiant heaters are arranged. To increase the efficiency and in particular the throughput of such ovens, it is known to increase the number of baking plates, which at the same time, however, the length of the oven and the amount of heat to be introduced must be increased.

In practice, it has been found that it is not possible to increase the amount of heat to be introduced by simply adding additional

Radiation heaters to achieve. Finally, by the

Radiant heaters generates a hot gas stream, which acts in a similar manner to a hot air curtain, especially for directed from above the baking tongs radiant heaters. The convection flow is disturbed by this hot cross flow and only the hot exhaust gas of a radiation heater arranged nearer to the exhaust is extracted from the exhaust. In the field of

Radiation heaters, it comes to a heat accumulation and possibly even damage to a so configured baking machine. Increasing the volumetric flow of the convection fan in turn impairs the function of those radiant heaters positioned near the convection fan outlet.

Thus, starting from the prior art, there is a conflict of objectives between efficient heating and increasing the throughput of generic ovens.

The object of the invention is to overcome the disadvantages of the prior art and in particular to solve this conflict of goals.

The object of the invention is particularly characterized by the features of

independent claim solved.

More particularly, the invention relates to an oven for making baked, preferably edible, products comprising: one along a longitudinal direction

extending endless conveyor and a plurality along the endless conveyor provided openable and closable baking tongs that lined up in particular

successively: a baking mass application area for applying a baking mass an open baking tongs, a closing area for closing the baking tongs, an elongated baking space extending along the endless conveyor for baking the baked products in the closed baking tongs, wherein at least one heating arrangement for heating the baking tongs located in the baking space is provided in the baking space, an opening area for opening the baking tongs Baking tongs and one

Backgutenteabebereich for taking the baked products from the open baking tongs, wherein, viewed along the longitudinal direction, a vent for discharging the combustion chamber gases is provided on one side of the baking chamber, wherein, viewed along the longitudinal direction, on the other side of the baking chamber, a first convection fan outlet to Producing a convection flow extending along the longitudinal direction to the outlet, and wherein a plurality of heating modules of the heating arrangement designed as radiation heating devices are arranged between the first convection fan outlet and the withdrawal along the longitudinal direction.

According to the invention, it is provided that viewed along the longitudinal direction, between a first heating module and a second heating module, a second

Convection blower outlet is provided for generating a convection flow extending along the longitudinal direction to the trigger.

Optionally, it is provided that the second convection fan outlet, in particular its outflow direction, is aligned along the longitudinal direction of the trigger.

Optionally, it is provided that the second convection fan outlet, in particular its outflow direction, exclusively direction deduction

is aligned.

A directional deduction only directional convection fan outlet points towards the trigger, the direction oblique to the longitudinal direction and / or in

Can be aligned longitudinally. In particular, "direction of vent" means that the gas exiting the convection fan outlet is by no means directed against the desired convection flow. Optionally, it is provided that along the longitudinal direction between the second heating module and the trigger at least one further heating module is provided, and that provided along the longitudinal direction between the second heating module and the further heating module, a further Konvektionsgebläseauslass to produce along the longitudinal direction extending to the trigger convection is, wherein the further convection fan outlet, in particular its

Outflow direction, aligned along the longitudinal direction of the trigger or is aligned only in the direction of the trigger.

Optionally, a heating module is provided between the first heating module and the second heating module, in front of which no convection fan outlet is provided.

If appropriate, a heating module is provided between the second heating module and the further heating module, in front of which no convection fan outlet is provided.

Optionally, it is provided that a plurality of heating modules are provided one after the other along the longitudinal direction, and that along the longitudinal direction between the heating modules, a plurality of convection fan outlets are provided for generating a convection flow extending along the longitudinal direction to the exhaust, each aligned along the longitudinal direction of the trigger or the

are aligned exclusively towards the deduction.

Optionally, it is provided that the endless conveyor or at least the

Baking tongs run along an upper transport plane, then be deflected in a rear deflection to a running below the upper transport plane, lower transport plane, then continue along the lower transport plane and deflected in a front deflection again to the upper transport plane, and wherein the upper Transport level and the lower

Transport level along the longitudinal direction 18 extend.

Optionally, it is provided that the first heating module, the second heating module and the optionally provided further heating module above the upper

Transport level are provided and from the top to the along the top Transport level arranged baking tongs are directed, or that the first

Heating module, the second heating module and optionally provided further heating module between the upper transport plane and the lower transport plane are provided and from the top of the along the lower transport plane

arranged baking tongs are directed.

Optionally, it is provided that two first heating modules, namely an upper first heating module and a lower first heating module, two second heating modules, namely an upper second heating module and a lower second heating module, and optionally two further heating modules, namely an upper further heating module and a lower further Heating module, are provided, wherein one of the two first, second and optionally further heating modules is provided above the upper transport plane and is directed from above to arranged along the upper transport plane baking tongs, and the other heating module between the upper transport plane and the lower transport plane is provided and is directed from above on the arranged along the lower transport plane baking tongs.

Optionally, it is provided that, as viewed along the longitudinal direction, between the or a first upper heating module and the or a second upper

Heating module, a second upper Konvektionsgebläseauslass is provided.

If appropriate, it is provided that, viewed along the longitudinal direction, a second lower convection fan outlet is provided between the first lower heating module and the second lower heating module.

Optionally, it is provided that along the longitudinal direction between the second upper heating module and the trigger at least one further upper heating module is provided that along the longitudinal direction between the second upper

Heating module and the other upper heating module another upper

Convection blower outlet is provided, wherein the further upper

Convection fan outlet, in particular its outflow direction, is directed along the longitudinal direction of the trigger. Optionally, it is provided that along the longitudinal direction between the second lower heating module and the trigger at least one further lower heating module is provided, and that along the longitudinal direction between the second lower heating module and the further lower heating module another lower

Convection fan outlet is provided, the further lower

Convection fan outlet, in particular its outflow direction, is directed along the longitudinal direction of the trigger.

Optionally, it is provided that between two upper heating modules

Convection fan outlet is provided, however, that of

Convection fan outlet between the corresponding lower two

Heating modules omitted. It can also be provided that a convection fan outlet is provided between two lower heating modules, but that the

Convection fan outlet between the corresponding upper two

Heating modules omitted. In particular, convection fan outlets may be arranged alternately above and below between the respective heating modules.

Optionally, it is provided that the trigger along through the

Convection fan outlets generated convection flow after the heating arrangement and in particular after all heating modules branches off the oven.

Optionally, it is provided that a regulating arrangement is provided for the separate or group-wise control or regulation of the volume flows output by the convection fan outlets, wherein the regulating arrangement

Flow regulator for changing the volume flows output by the Konvektionsgebläseauslässe, and / or wherein the regulating arrangement controllable or controllable blower for changing the by the

Convection blower outlets comprises output flow rates.

Optionally, it is contemplated that one or each convection fan outlet comprises one or more outlet nozzles. If appropriate, it is provided that the volume flow output by the convection fan outlets, if appropriate preheated, ambient air and / or in the oven or befindliches from the

Backspace removed baking chamber gas is.

Optionally, it is provided that the at least one second

Convection fan outlet and optionally provided at least one further convection fan outlet are each connected to a fan arranged outside the baking chamber, wherein the fan ambient air or extracted from the baking chamber baking space gas is supplied.

Optionally, it is provided that the at least one second

Convection fan outlet and optionally provided at least one further convection fan outlet are each connected to a fan disposed within the baking chamber, acting as a fan, blower, wherein the blower located in the oven backspace gas is supplied.

Optionally, it is provided that at least one convection heating module

is provided, wherein the Konvektionsheizmodul one of the heating modules and

optionally also along the convection flow to the heating module

upstream convection fan outlet and possibly the the

Convection fan outlet of this convection heating module associated fan.

Optionally, it is provided that the convection heating module comprises an upper heating module and an associated lower heating module, in particular the second upper heating module and the second lower heating module or the further upper heating module and the further lower heating module.

Optionally, it is provided that the convection heating module comprises the associated convection fan outlets upstream of the heating modules, and that the convection heating module optionally comprises the fan associated with the convection fan outlets of this convection heating module.

If appropriate, it is provided that two or more convection heating modules are arranged along the longitudinal direction. In particular, the invention relates to a method for producing baked, preferably edible, products in an oven, in which several along an endless conveyor provided openable and closable baking tongs, strung together in particular successively: by a baking mass application area for applying a baking mass to an open baking tongs, by a closing area for Close the

Baking tongs, by an elongated conveyor running along the endless conveyor

Baking room for baking the baked products in the closed baking tongs, in which at least one heating arrangement for heating located in the oven

Baking tongs is provided, through an opening area for opening the baking tongs, and transported through a baking product removal area for taking the baked products from the open baking tongs, wherein, viewed along the longitudinal direction, on one side of the baking chamber, the combustion chamber gases are discharged through a trigger, wherein viewed along the longitudinal direction, on the other side of the baking chamber through a first convection fan outlet a first

Gas volume flow is introduced to form or support a running along the longitudinal direction to the trigger convection in the oven.

Optionally, it is provided that the baking space gas flowing along the convection flow passes through at least one first heating module and is heated, wherein the baking space gas flowing along the convection flow is admixed by the first heating module with a first heating gas volume flow, then the baking space gas flowing along the convection flow subsequently at least one second convection fan outlet happening along the

Convection flow flowing baking chamber gas through the second

A second gas volume flow is added to the convection fan outlet, or wherein the baking space gas flowing along the convection flow is conveyed on through the second convection fan outlet, which flows along the convection fan outlet

Convection flow flowing baking chamber gas then passes at least a second heating module and is thereby heated, the along the

Convection flow flowing baking gas through the second heating module, a second Heizgasvolumenstrom is added, and that along the Convection flow flowing baking chamber gas then flows through the oven further and then enters the fume hood.

According to one embodiment, it may be provided that the endless conveyor and the baking tongs are deflected at a rear deflection point arranged in the baking chamber and at a front deflection point arranged away from the baking space in a front head, wherein the baking space is designed as a substantially closed baking space with a heat insulation an entrance opening to the entrance of

Baking tongs, an outlet opening for the outlet of the baking tongs and a trigger for the discharge of the combustion chamber gases, and wherein at least one convection fan is provided, which opens remote from the trigger into the baking chamber.

Alternatively it can be provided that the baking mass application area, the

Closing, the Öffenbereich and the baking product removal area are arranged within the baking chamber. It can be provided that the entire

Endless conveyor or at least all arranged on the endless conveyor baking tongs, in particular during the baking operation, are arranged within the baking chamber.

Optionally, it is provided that a controllable or controllable exhaust fan for extracting the combustion gas is provided by the or a deduction.

Optionally, the invention relates to an oven for producing baked, preferably edible, products, comprising a baking chamber, with a lower

Baking area and arranged above the lower baking area upper baking area, a baking tong chain, the continuously circulating along an upper transport plane through the upper baking area and along a lower

Transport level is moved through the lower baking area, and contains the folding and baking tongs.

Optionally, it is provided that the baking tongs each comprise a top plate arrangement and a bottom plate arrangement, between which in the closed position a baking mold for the baked products is formed. Optionally, it is provided that the upper plate arrangement and the lower plate arrangement each have a side facing away from the baking mold

Have back surface, which are each connected via a heat-conducting and -speichernden base body with the baking mold.

Optionally, it is provided that the baking tongs are reversed during the transition from the upper transport plane to the lower transport plane, so that arranged in the upper transport plane above the lower plate assembly

Upper plate arrangement in the lower transport plane below the

Lower plate assembly is arranged.

In all embodiments, the invention may preferably have an oven for

Production of crispy brittle flat wafers or hollow wafers concern. These baking ovens open and zuklappbare baking tongs are passed through a heated oven oven. The crispy, brittle consistency of the baked products results from the effect that baked masses or doughs with a high water content of about 50-70% are baked under high pressure. The water of the baking mass escapes in the form of water vapor very quickly, leaving behind a porous, brittle structure. In order to carry out the baking process under high pressure, locking devices are provided in particular. About these can the

Back tongs are locked so that it can build up pressure inside. Only by this overpressure, the desired baking process can be achieved. The locking devices are preferably provided on the baking tongs and operated in or after the closing area.

Optionally, it is provided that at least one designed as a radiant heater upper heating device and at least one designed as a radiant heater lower heating device are provided, in each of which a

Combustion mixture containing primary oxygen and a fuel is burned.

In all embodiments, the baking mass may have a liquid or a liquid-pasty consistency. Optionally, it is provided that the upper heating device is arranged in the upper baking area and above the upper transport plane and for heating the

Baking mold is directed from above on the back surface of the top plate assembly.

Optionally, it is provided that the lower heater in the lower

Baking area between the upper transport plane and the lower transport plane is arranged and is directed to heat the baking mold from above on the back surface of the lower plate assembly.

Optionally, it is provided that the heaters each have a porous body on its underside, in which and / or at the surface of the fuel mixture is burned and is preferably burned substantially free of flames, and that the porous body, for example, a metal mesh, a wire mesh or a metal mesh is or contains.

Optionally, it is provided that a conveying device, such as in particular a blower, is provided for supplying the combustion mixture to a heating device, and that via control and / or regulation of the conveying device, the heating power of the heating device is variable and preferably that the upper heating device with an upper conveyor and the lower heater with a lower one

Conveyor is connected so that the heating powers of the upper heater and the lower heater separately from each other changeable, in particular separately controllable or separately controllable, are.

Optionally, it is provided that a plurality of upper heaters and / or a plurality of lower heaters are provided and preferred that the

Heating outputs of the upper heaters and the lower heaters separately variable, in particular separately controllable or separately controllable, are or preferred that the heating powers of two upper heaters separately variable, in particular separately controllable or separately controllable, or preferred that the heating powers of two lower

Heating devices separately changeable, in particular separately controllable or separately controllable, are. Optionally, it is provided that the exhaust opening along the

Convection flow direction of the baking chamber gas is arranged away from the heating devices, so that the hot rising baking chamber gas is passed in a horizontal direction through the baking chamber before it exits through the exhaust opening.

Optionally, it is provided that an upper heating device and a lower heating device are arranged in the region of the rear deflection region of the baking tong chain and / or immediately before and after the rear deflection region.

Optionally, it is provided that the walls of the baking chamber are completely or partially provided with a thermal insulation.

Optionally, it is provided that the baking chamber at its bottom in

Is substantially closed and is provided on its underside with a thermal insulation, wherein the baking chamber optionally has an opening at the bottom, said opening preferably occupies less than ten percent of the surface of the closed bottom of the oven.

Optionally, it is provided that the baking chamber comprises a heating zone in which at least one heating device is provided and in which the baking tongs are heated by direct action of the heat radiation of the heating device.

Optionally, it is provided that the baking chamber comprises a radiation-heating-free zone, in which no direct heating of the baking tongs by the radiation of the heater is provided along the upper transport plane and / or along the lower transport plane and in which moved the baking tongs by the action of convection heat in the convection flow direction be called

Combustion gas to be heated.

Optionally, it is provided that the exhaust opening in a

Radiation heating-free zone of the oven is provided. Optionally, it is provided that along the convection flow first the confluence of the first convection fan outlet, then an area of the

Combustion chamber, in which the or a heating arrangement is provided, and then the deduction are flowed through, in particular between the region of the combustion chamber, in which the or a heating arrangement is provided, and the trigger a

Convection is provided in which no heating arrangement, ie a

Radiation heating-free zone of the oven, is provided.

Optionally, it is provided that the convection flow in the baking chamber along the main movement direction of the baking tongs and in particular runs substantially horizontally before exiting the trigger.

Optionally, it is provided that the regulating arrangement is also suitable or set up for controlling the baking chamber temperature.

Optionally, it is provided that the regulating arrangement at least one sensor, such as in particular a temperature sensor, a pressure sensor, a

Moisture sensor and / or a sensor for determining a volume flow of the convection flow comprises. If necessary, it is provided that the

Regulieranordnung comprises at least one sensor for controlling the baking tongs temperature, wherein the sensor is preferably designed as a non-contact temperature sensor.

Optionally, it is provided that the convection fan is a gas blower and in particular an air blower over which controlled convection or controlled gas is introduced, wherein the gas is not the combustion of the fuel of the heating arrangement, but preferably exclusively the generation of a convection.

Optionally, it is provided that the baking chamber is provided with a thermal insulation. As a heating module in particular a spatially delimited, preferably independent, heating device is defined, which can be connected in particular as a single component modular with the oven. For example, a heating module is on

Radiant burner or more via a common support frame interconnected radiant burner. Preferably, the heating module can be controlled or regulated independently, so that the heating power of the heating module can be adjusted individually.

Along the longitudinal direction of the oven, a plurality of heating modules are preferably provided. In order to generate a convection flow, which enables an improved operation of the oven, preferably also several

Convection blower outlets provided.

Optionally, it is provided that along the convection flow before each heating module, a convection fan outlet is provided. This will cause the transverse flow caused by the heating module not to interfere with the longitudinal convective flow. In addition, this can be a

improved convection flow can be generated. In particular, the volumetric flow exiting each convection fan outlet can be separately controlled or regulated. Each convection fan outlet may include a plurality of outlet nozzles.

Alternatively, it may be provided that a convection fan outlet is not arranged in front of each heating module, but only in front of selected heating modules. Thus, along the convection flow between the first heating module and the second heating module, a heating module may be present, in front of which no separate

Convection fan outlet is arranged. In particular, according to this

Embodiment not before each heating module, a convection fan outlet

be provided. This, too, causes the transverse flow caused by the heating module not to effect the longitudinal convective flow

impaired. Optionally, therefore, a heating module is provided between the first heating module and the second heating module, before no

Convection fan outlet is provided. Optionally, between the second Heating module and the further heating module provided a heating module, in front of which no convection fan outlet is provided.

Preference is given to emerging from the convection fan outlets

Volumetric flow controlled such that a continuous, the entire oven through-flowing, in particular constant or accelerating,

Convection flow is generated.

The convection flow preferably flows through the entire baking chamber over several heating modules and opens into a fume hood. The convection flow preferably flows through the entire oven. As a result, a continuous baking zone with a continuous convection flow is formed.

Preferably, the convection fan outlets for generating the

Convection flow in the longitudinal direction and direction deduction directed. The

Convection fan outlets are thus all aligned in the direction in which the convection flows. Optionally, the outlets may be aligned obliquely to the convection flow in all embodiments. In particular, the convection fan outlets may each comprise one or more outlet nozzles. Through these outlet nozzles, the direction of the exiting gas can be determined.

Preferably, the baking tongs extend over long distances along an upper and along a lower transport plane. For heating the baking tongs, a plurality of heating modules are preferably provided above the upper transport plane and between the upper and the lower transport plane. The heating modules are preferably each directed from above to the corresponding baking tongs or to the corresponding areas in which the baking tongs along the

Continuous conveyor to be transported. It is preferably provided that along the longitudinal direction between two heating modules of a transport plane

Convection fan outlet is provided. In particular, along the Convection flow before each heating module, a convection fan outlet acting in convection flow direction.

The convection fan outlets are configured to output a volumetric flow to produce a convection flow. To produce this

Volume flow is preferably provided a fan. As a source for the

Volume flow, for example, ambient air through the

Konvektionsgebläseauslass be issued. Alternatively or additionally, the gas located in the baking chamber or gas taken from the baking chamber can also be supplied. In particular, it can also be provided that a convection fan outlet arranged along the longitudinal direction between two heating modules is formed by a fan which is arranged in the baking chamber.

Subsequently, the invention with reference to the figures and on the basis of concrete

Embodiments further described.

Figures 1 and 2 show schematic sectional views of two different embodiments of ovens according to the invention.

Unless otherwise indicated, the reference numerals in the figures correspond to the following components:

Endless conveyor 1, baking tongs 2, baking mass application area 3, closing area 4, baking chamber 5, opening area 6, baking product removal area 7, heating arrangement 8, convection flow 9, first heating module 10, second heating module 1 1, second

Convection fan outlet 12, further heating module 13, further

Convection fan outlet 14, fume hood 15, first convection fan outlet 16, upper transport plane 17, longitudinal direction 18, rear deflection region 19, lower

Transport plane 20, front deflection region 21, regulating arrangement 22, fan 23, convection heating module 24, unheated area 25.

Figure 1 shows a schematic sectional view of an embodiment of a baking oven according to the invention. The oven comprises an endless conveyor 1, on which a plurality of baking tongs 2 are mounted. These baking tongs 2 are made by movement of the endless conveyor 1 successively through a baking mass application area 3 for applying a baking compound to the open baking tongs 2, by a closing area 4 for closing the baking tongs 2, by a baking chamber 5 for baking

Baking products in the closed baking tongs 2, by a Öffenbereich 6 for opening the baking tongs 2, by a baking product removal area 7 for removing the baked products from the open baking tongs 2 and back to

Baking mass order 3 promoted where the process can start over.

The endless conveyor 1 and / or the baking tongs 2 extend in the longitudinal direction 18 along an upper transport plane 17 to a rear deflection region 19 in which the endless conveyor 1 and / or the baking tongs 2 are deflected from the upper transport plane 17 to a lower transport plane 20 along the bottom

Transport level 20 to a front deflection area 21, in which the

Endless conveyor 1 and the baking tongs 2 are deflected back to the upper transport plane 17.

On a side of the baking chamber 5, viewed along the longitudinal direction 18, a first convection fan outlet 16 is provided. On the other side of the baking chamber 5, viewed along the longitudinal direction 18, a trigger 15 is arranged. Starting from the first convection fan outlet 16, the baking chamber 5 of a

Convection flow 9 flows through. The convection flow 9 runs in

Substantially along the longitudinal direction 18.

Between the first convection fan outlet 16 and the trigger 15 is in

Baking chamber 5 a heating arrangement 8 is provided. The heating arrangement 8 comprises a plurality of heating modules 10, 11, 13. In particular, a first upper heating module 10 ', a second upper heating module 11' and in this embodiment also a further upper heating module 13 'are arranged in succession along the convection flow 9. These upper heating modules 10 ', 1 T, 13' are formed as radiant heaters and directed from above onto the endless conveyor 1 and on the baking tongs 2. The upper heating modules 10 ', 1 T, 13' are for this purpose above the upper T ransportebene 17th

intended. In the present embodiment, furthermore, a first lower heating module 10 ", a second lower heating module 11" and, in this embodiment, also a further lower heating module 13 "are arranged one after the other along the convection flow 9. These lower heating modules 10 ", 11", 13 "are likewise designed as radiant heaters, and are directed from above onto the endless conveyor 1 or onto the baking tongs 2. However, the lower heating modules 10 ", 11", 13 "are provided between the upper transport plane 17 and the lower transport plane 20.

Between the first heating module 10 and the second heating module 1 1 is

According to the invention, a second convection fan outlet 12 is provided. In the present embodiment, a second upper convection fan outlet 12 'is provided between the first upper heating module 10' and the second upper heating module 1 T. Furthermore, a second lower convection fan outlet 12 "is provided between the first lower heating module 10" and the second lower heating module 1 1 ".

In the present embodiment, between the second upper heating module 1 1 'and the other upper heating module 13' another upper

Convection fan outlet 14 'is provided. Further, between the second lower heating module 11 "and the further lower heating module 13" another lower

Convection fan outlet 14 "provided.

The second convection fan outlets 12 are adapted to

To maintain and / or reinforce convection flow 9. For this purpose, the convection fan outlets 12, 14, 16 essentially along the longitudinal direction 18 or along the convection flow 9 in the direction of the trigger 15.

By this configuration, a uniform, continuous convection flow 9 is generated, which flows through the baking chamber 5 along the longitudinal direction 18, and then exit from the trigger 15.

The direction of the convection flow 9 in the present embodiment is opposite to the transport direction of the baking tongs 2 or of the endless conveyor 1 along the upper transport plane 17. This will cause the convection flow 9 transported heat energy in countercurrent to the baking tongs 2. The baking tongs 2, however, are charged in the baking mass application area 3 with a relatively cool baking compound and thereby cooled at least locally. By the heat transfer between the Konvektionsströmung 9 and the

Baking tongs 2, the efficiency of the oven can be further improved.

Preferably, each convection fan outlet 12, 14, 16 comprises at least one outlet nozzle suitable and / or adapted to the direction of the

to determine the output volumetric flow.

In the embodiment of Figure 1, a plurality of blowers 23 are provided. Each blower 23 of the present embodiment each having an upper one

Convection fan outlet 12 ', 14', 16 'and a lower convection fan outlet 12 ", 14", 16 "connected.

According to the present embodiment, a regulation arrangement 22 can be provided, via which the volume flow output by the convection fan outlets 12, 14, 16 can be influenced individually or in groups, in particular controlled or regulated. Thus, in the present embodiment, the blowers 23 are designed as controllable or controllable fans 23, wherein the delivery rate can be controlled or regulated via the regulator arrangement 22. A control circuit can in all embodiments in particular via a

Volumetric balance are formed, which balances all introduced volume flows and all exiting flow rates to obtain an improved convection flow 9. As a control variable, for example, the baking chamber temperature at different locations of the oven 5 or the baking chamber temperature

be used.

Alternatively or additionally, in all embodiments, the regulating arrangement 22 may be provided with flow regulators for changing the flow through the

Convection blower outlets 12, 14,16 output volume flow included.

Such flow regulators can, for example, controllable slides, diaphragms,

Be valves or throttles. The fans 23 are arranged in the present embodiment, outside the baking chamber 5 and suck ambient air to this ambient air through the

Convection blower outlets 12, 14, 16 in the baking chamber 5 introduce.

Optionally, the sucked ambient air can be preheated before being introduced into the baking chamber 5. This preheating can for example be done by a heat exchanger, which uses as a heat medium, for example, the derived heat of the trigger 15.

In order to increase the throughput of a baking oven according to the invention, ie to increase the amount of baked products that can be produced per unit of time, the number of baking tongs 2 can be increased. However, to increase the number of baking tongs 2, the length of the oven along the longitudinal direction 18 must also be increased. In addition, the amount of heat introduced by the heating arrangement 8

Heating capacity can be increased. For this purpose, the oven is preferably modular and has a plurality of convection heating modules 24.

A convection heating module 24 comprises at least one heating module 10, 11, 13 and a convection fan outlet 12, 14, 16, wherein the convection fan outlet 12, 14, 16,

16 along the convection 9 in front of the associated heating module 10, 1 1, 13 is arranged. In the present embodiment, a

Convektionsheizmodul 24 two heating modules 10, 11, 13, in particular an upper heating module 10 ', 1 1', 13 'and a lower heating module 10 ", 11", 13 "and two

Convection fan outlets 12, 14, 16, in particular an upper one

Convection fan outlet 12 ', 14', 16 'and a lower convection fan outlet 12 ", 14", 16 ". Also for the convection fan outlets 12, 14, 16 of this

Convection heating module 24 competent blower 23 may be part of the

Convection heating module 24 be.

Optionally, the housing in the region of the convection heating module 24 can be regarded as part of the convection heating module 24. This housing can

formed, for example, as a self-supporting and / or self-standing housing his. By such a configuration, the oven can be extended by stringing a plurality of similar Konvektionsheizmodule 24.

Along the convection flow 9 are first the heating assembly 8 in a heated zone, then a non-heated area 25 and then the trigger 15 is provided.

Figure 2 shows a further embodiment of a baking oven according to the invention, which is characterized by the design of the components for generating the

Convection 9 differs from the embodiment of Figure 1. However, the basic structure of the embodiment of Figure 2 is consistent with the basic structure of the embodiment of Figure 1.

In contrast to the embodiment of Figure 1, the blower 23 of the

Embodiment of Figure 2 within the baking chamber 5 is arranged. In particular, the blowers 23 are designed as fans, the source of which is the gas in the baking space 5 for generating the volumetric flow exiting the convection fan outlets 12, 14, 16. Only that blower 23 which is connected to the first convection blower outlet 16 is a blower 23 arranged outside the baking chamber 5, which draws in ambient air and possibly preheated ambient air. This configuration is made by the second

Convection blower outlets 12 and the other convection blower outlets 14 no volume flow introduced from the outside into the baking chamber 5, but only supports the already prevailing in the baking chamber 5 convection 9 and further promoted. Also in the embodiment of FIG. 2, a regulator assembly 22 is provided over which the one exiting the convection fan outlets 12, 14, 16

Volume flow can be controlled or regulated. In particular, each fan 23 can be controlled or regulated separately.

In the embodiment of FIG. 2, two similar convection heating modules 24 are provided.

In all embodiments, along the convection flow 9, in particular per T ransportebene 17, 20, two, three, four or more heating modules 10, 1 1, 13 be provided. In the present embodiments, three heating modules 10, 11, 13 are provided per transport plane 17, 20, in particular a first heating module 10, a second heating module 11 and a further heating module 13. Optionally, a plurality of further heating modules 13 may be provided, whereby the length of the

Baking oven and increase the number of baking tongs 2 and the throughput. This expansion can, as described, be carried out by a modular extension through the convection heating modules 24.

In all embodiments, the following methods can be used for the production of baked products:

In the oven an endless conveyor 1 is moved, the openable and closable baking tongs 2 carries. The baking tongs 2 are successively through the top

promoted areas of the oven. On one side of the baking chamber 5 of the oven, in particular in the rear deflection region 19, a first convection fan outlet 16 introduces a first gas volume flow. This first gas volume flow serves to form or support one along the

Longitudinal direction 18 to the trigger 15 extending convection 9th

The baking space gas flowing along the convection flow 9 is subsequently heated by at least one first heating module 10. In all embodiments, it is preferably provided that the heating modules 10, 1 1, 13 are formed as Strahlungsheizmodule, wherein the heating modules 10, 1 1, 13 preferably in all

Embodiments are designed as projecting into the baking chamber 5 or provided in the oven 5 radiant heaters. Through the heating module, a heating gas volume flow is added to the baking space gas flowing along the convection flow 9. This heating gas volume flow can, for example, the exhaust gas of the

Be heating module. The first Heizgasvolumenstrom is particularly transverse to

Convection flow 9 introduced.

Subsequently, this happens along the convection flow 9 flowing

Backspace gas, the second convection fan outlet 12. By this second convection fan outlet 12 which flows along the convection flow 9 Backspace gas further promoted. This further promotion is done for example by the addition of a second gas flow along the direction of the

Convection flow 9 or by a mechanical further promotion of the

Backraumgases by a blower designed as a fan 23rd

Subsequently, this happens along the convection flow 9 flowing

Backspace gas at least a second heating module 1 1. This second heating module 1 1 heats the flowing baking chamber gas and the baking chamber gas adds a second Heizgasvolumenstrom, whereby also this Heizgasvolumenstrom across to

Convection flow 9 is introduced.

Subsequently, the baking chamber gas flows through the baking chamber 5, wherein in this

Back room 5 optionally further heating modules 13 and preferably also a non-heating zone 25 is or are provided. Subsequently, the baking space gas flowing along the convection flow 9 enters the fume hood 15 and preferably also exits the baking machine through the fume cupboard 15. Optionally, a partial flow of exiting through the hood 15 baking space gas is recirculated and introduced back into the oven 5 - for example, by one of

Convection fan outlets 12, 14, 16.

In the course of the convection flow 9, further volume flows are preferably added to the baking chamber gas in the baking chamber 5. However, in the course of the

Convection flow 9 no volume flows dissipated. So the whole

Convective flow 9 discharged through the arranged on one side of the oven 5 fume hood 15.

As a result, an optimal utilization of the convection flow in the 9th

located heat energy allows. The flow is conducted as long as possible along the endless conveyor 1 and along the baking plates in order to be able to deliver the heating heat to these components. Preferably, the speed of

Convection flow 9 selected in all embodiments, in particular controlled and / or regulated such that the surfaces of the baking tongs 2 in the region of the trigger 15 have substantially the same temperature as the baking space of the gas Convection flow 9 in the area of the fume hood 15. This means that in

Substantially all of the transferable heat of the convection flow 9 has been delivered to the baking tongs 2. The baking tongs 2 are preferably guided along their upper transport plane 17 against the direction of the convection flow 9. As a result, the heat transfer happens according to the countercurrent principle.

Claims

claims

1. oven for producing baked, preferably edible, products, comprising an endless conveyor (1) extending along a longitudinal direction (18) and a plurality of openable and closable baking tongs (2) provided along the endless conveyor (1), which are lined up successively:

a baking compound application area (3) for applying a baking compound to an open baking tongs (2),

a closing area (4) for closing the baking tongs (2),

- An along the endless conveyor (1) extending, elongated baking chamber (5) for baking the baked products in the closed baking tongs (2), wherein in the baking chamber (5) at least one heating assembly (8) for heating in the baking chamber (5) baking tongs (2) is provided

- an opening area (6) for opening the baking tongs (2)

- and a baked product removal area (7) for removing the baked products from the open baking tongs (2) go through,

- wherein, viewed along the longitudinal direction (18), on one side of the baking chamber (5) a trigger (15) is provided for the discharge of the combustion chamber gases,

- wherein, viewed along the longitudinal direction (18), on the other side of the baking chamber (5), a first convection fan outlet (16) for generating along the longitudinal direction (18) to the trigger (15) extending

Convection flow (9) is provided

- And wherein between the first convection fan outlet (16) and the trigger (15) along the longitudinal direction (18) considered more than

Radiant heaters formed heating modules (10, 1 1, 13) of the

Heating arrangement (8) are arranged,

characterized,

- That, as viewed along the longitudinal direction (18), between a first

Heating module (10) and a second heating module (1 1) a second

Convection fan outlet (12) for generating along the longitudinal direction (18) to the trigger (15) extending convection flow (9) is provided.

2. Oven according to claim 1, characterized

- That the second convection fan outlet (12), in particular its

Outflow direction, along the longitudinal direction (18) direction of the trigger (15) is aligned,

- Or that the second convection fan outlet (12), in particular its outflow direction, is oriented exclusively in the direction of the trigger (15).

3. Oven according to one of claims 1 or 2, characterized

- That along the longitudinal direction (18) between the second heating module (11) and the trigger (15) at least one further heating module (13) is provided, and that along the longitudinal direction (18) between the second heating module (1 1) and the other Heating module (13) a further convection fan outlet (14) for

Generating a along the longitudinal direction (18) to the trigger (15) extending convection flow (9) is provided, wherein the further

Convection fan outlet (14), in particular its outflow direction, along the longitudinal direction (18) direction of the trigger (15) is aligned or exclusively aligned with the direction of trigger (15).

4. Oven according to one of claims 1 -3, characterized in that along the longitudinal direction (18) successively more heating modules (10, 1 1, 13)

are provided, and that along the longitudinal direction (18) between the

Heating modules (10, 1 1, 13) a plurality of convection fan outlets (12, 14, 16) for generating along the longitudinal direction (18) to the trigger (15) extending convection flow (9) are provided, each along the longitudinal direction

(18) Direction hood (15) are aligned or the direction only deduction (15) are aligned.

5. Oven according to one of claims 1 -4,

- Wherein the endless conveyor (1) or at least the baking tongs (2) along an upper transport plane (17) extend, then in a rear deflection region

(19) on a, below the upper transport plane (17) extending lower transport plane (20) are deflected, then further along the lower

Transport plane (20) extend and in a front deflection region (21) again be deflected to the upper transport plane (17), and wherein the upper transport plane (17) and the lower transport plane (20) along the

Extending longitudinal direction (18), characterized

- That the first heating module (10), the second heating module (1 1) and the

optionally provided further heating module (13) above the upper

Transport level (17) are provided and directed from above on the along the upper transport plane (17) arranged baking tongs (2),

- Or that the first heating module (10), the second heating module (1 1) and optionally provided further heating module (13) between the upper transport plane (17) and the lower transport plane (20) are provided and from the top of the along the lower Transport level (20) arranged

Baking tongs (2) are directed.

6. Oven according to one of claims 1 -4,

- Wherein the endless conveyor (1) or at least the baking tongs (2) along an upper transport plane (17), then in a rear deflection region (19) to a, below the upper transport plane (17) extending lower transport plane (20) are deflected , then continue along the bottom

Transport plane (20) extend and in a front deflection region (21) are redirected to the upper transport plane (17), and wherein the upper transport plane (17) and the lower transport plane (20) along the

Extending longitudinal direction (18), characterized

- That two first heating modules (10), namely an upper first heating module (10 ') and a lower first heating module (10 "), two second heating modules (1 1), namely an upper second heating module (11') and a lower second heating module (1 1 "), and optionally two further heating modules (13), namely an upper further heating module (13 ') and a lower further heating module (13"), are provided, wherein each one of the first two (10), second (1 1) and optionally further heating modules (13) above the upper transport plane (17) is provided and from above on the along the upper transport plane (17) arranged baking tongs (2) is directed, and the respective other heating module (10, 1 1, 13 ) between the upper transport plane (17) and the lower transport plane (20) is provided and arranged from above on the along the lower transport plane (20) arranged baking tongs (2).

7. Oven according to claim 6, characterized

that, viewed along the longitudinal direction (18), a second upper convection fan outlet (12 ') is provided between the first upper heating module (10') and the second upper heating module (11 '),

- and that along the longitudinal direction (18) viewed between the first lower heating module (10 ") and the second lower heating module (1 1"), a second lower convection fan outlet (12 ") is provided.

8. Oven according to one of claims 6 or 7, characterized

that at least one further upper heating module (13 ') is provided along the longitudinal direction (18) between the second upper heating module (11') and the trigger (15),

- That along the longitudinal direction (18) between the second upper heating module (1 1 ') and the further upper heating module (13'), another upper

Convection blower outlet (14 ') is provided, wherein the further upper convection blower outlet (14'), in particular its outflow direction, along the longitudinal direction (18) is directed towards the trigger (15),

that at least one further lower heating module (13 ") is provided along the longitudinal direction (18) between the second lower heating module (11") and the trigger (15),

- and that along the longitudinal direction (18) between the second lower heating module (1 1 ") and the further lower heating module (13"), another lower Konvektionsgebläseauslass (14 ") is provided, wherein the further lower convection fan outlet (14"), in particular whose outflow direction, along the longitudinal direction (18) direction of the trigger (15) is directed.

A baking oven according to any one of claims 1 to 8, characterized in that the vent (15) follows the convection flow (9) generated by the convection fan outlets (12, 14, 16) after the heating arrangement (8) and

in particular after all heating modules (10, 1 1, 13) branches off the baking chamber (5).

10. Oven according to one of claims 1 to 9, characterized

in that a regulation arrangement (22) for the separate or group-wise control of the convection fan outlets (12, 14, 16)

provided volume flows is provided

wherein the regulating arrangement (22) comprises flow regulators for changing the volume flows output by the convection fan outlets (12, 14, 16),

- and / or wherein the regulating arrangement (22) comprises controllable or controllable fans (23) for varying the volume flows output by the convection fan outlets (12, 14, 16).

11. A baking oven according to any one of claims 1-10, characterized in that one or each convection fan outlet (12, 14, 16) one or more

Includes outlet nozzles.

12. Oven according to one of claims 1 -1, characterized in that the convection blower outlet (12, 14, 16) output volume flow, possibly preheated, ambient air and / or in the oven (5) befindliches or from the baking chamber (5). removed backspace gas is.

13. Oven according to one of claims 1 to 12, characterized

- That the at least one second convection fan outlet (12) and optionally provided at least one further

Convection fan outlet (14) are each connected to a fan (23) arranged outside the baking space (5), wherein the fan (23)

Ambient air or from the baking chamber (5) removed backspace gas is supplied

- Or that the at least one second convection fan outlet (12) and optionally provided at least one further

Convection fan outlet (14) each with a within the baking chamber (5) arranged, acting as a fan, fan (23) are connected to the fan (23) in the baking chamber (5) befindliches baking space gas is supplied.

14. Baking oven according to one of claims 1 -13, characterized in that at least one Konvektionsheizmodul (24) is provided, wherein the

Convection heating module (24) of one of the heating modules (10, 11, 13) and preferably along the convection flow (9) the heating module (10, 11, 13)

upstream convection fan outlet (12, 14, 16) and optionally the blower (23) associated with the convection fan outlet (12, 14, 16) of said convection heating module (24).

15. Oven according to claim 14, characterized in that

- That the convection heating module (24) has an upper heating module (10 ', 1 1', 13 ') and an associated lower heating module (10 ", 11", 13 "), in particular the second upper heating module (1 1') and the second lower heating module (1 1 ") or the further upper heating module (13 ') and the further lower heating module (13"),

- That the convection heating module (24) preferably the associated, the

Comprising heating modules (10, 11, 13) upstream, convection fan outlets (12, 14, 16),

and that the convection heating module (24) optionally the the

Convection fan outlets (12, 14, 16) of this convection heating module (24) associated with blower (23).

16. Oven according to one of claims 14 or 15, characterized in that along the longitudinal direction (18) two or more convection heating modules (24) are arranged.

17. A method for producing baked, preferably edible, products in an oven, in which several along an endless conveyor (1) provided openable and closable baking tongs (2), lined up respectively

successively:

by a baking compound application area (3) for applying a baking compound to an open baking tongs (2),

by a closing area (4) for closing the baking tongs (2),

- By an along the endless conveyor (1) extending, elongated baking chamber (5) for baking the baked products in the closed baking tongs (2), in the at least one heating arrangement (8) is provided for heating the baking tongs (2) located in the baking chamber (5),

through an opening area (6) for opening the baking tongs (2),

- And by a baking product removal area (7) for removing the

baked products are transported out of the open baking tongs (2),

- Wherein, viewed along the longitudinal direction (18), on one side of the baking chamber (5) the combustion chamber gases are discharged through a trigger (15),

- wherein, viewed along the longitudinal direction (18), on the other side of the baking chamber (5) by a first convection fan outlet (16) a first gas flow to form or support along the longitudinal direction (18) to the trigger (15) extending convection ( 9) is introduced into the baking chamber (5),

characterized,

in that the baking space gas flowing along the convection flow (9) passes at least one first heating module (10) and is heated thereby, wherein a first heating gas volume flow is added to the baking space gas flowing along the convection flow (9) by the first heating module (10),

in that the baking space gas flowing along the convection flow (9) then passes through at least one second convection fan outlet (12), wherein a second gas volume flow is added to the baking space gas flowing along the convection flow (9) through the second convection fan outlet (12) or along the convection flow (12). 9) flowing backspace gas is conveyed on through the second convection fan outlet (12),

that the baking space gas flowing along the convection flow (9) subsequently passes through at least one second heating module (11) and is heated thereby, wherein a second heating gas volume flow is added to the baking space gas flowing along the convection flow (9) by the second heating module (11);

- And that along the convection flow (9) flowing backspace gas then continues to flow through the baking chamber (5) and then enters the trigger (15).