WO2020010513A1 - Appareil de cuisson pour produits de boulangerie comprenant un générateur de vapeur - Google Patents

Appareil de cuisson pour produits de boulangerie comprenant un générateur de vapeur Download PDF

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Publication number
WO2020010513A1
WO2020010513A1 PCT/CN2018/095119 CN2018095119W WO2020010513A1 WO 2020010513 A1 WO2020010513 A1 WO 2020010513A1 CN 2018095119 W CN2018095119 W CN 2018095119W WO 2020010513 A1 WO2020010513 A1 WO 2020010513A1
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WO
WIPO (PCT)
Prior art keywords
steam generator
heater
steam
water
primary
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Application number
PCT/CN2018/095119
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English (en)
Inventor
Jun Li
Hartmut GOY
Original Assignee
Jung Gmbh Apparatebau
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Filing date
Publication date
Application filed by Jung Gmbh Apparatebau filed Critical Jung Gmbh Apparatebau
Priority to PCT/CN2018/095119 priority Critical patent/WO2020010513A1/fr
Publication of WO2020010513A1 publication Critical patent/WO2020010513A1/fr

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    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21B—BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING
    • A21B1/00—Bakers' ovens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising

Definitions

  • the invention relates to an apparatus for baking bakery products, in-cluding an oven with a oven chamber for baking bakery products.
  • crusty baking products that are crusty, e.g. crusty bread rolls or crusty bread
  • crusty bread or crusty bread rolls can be prepared.
  • Crusty baking products are commonly referred to as “European style bakery products” .
  • Soft baking products are commonly referred to as “Asian style bakery products” .
  • a splash-on-material steam generator comprises a plurality of heat storage bodies made from metal or stone having a high heat capacity.
  • the heat storage bodies are heated to a high enough temperature that allows water to evaporate.
  • steam is to be released, water is splashed onto the heat storage bodies that were heated to a high temperature. In this case water almost instantaneously evaporates, thereby steam is created quickly and with high power.
  • a splash-on-material steam generator usually is employed to obtain European style crusty bakery products.
  • the heat storage bodies have a relatively high heat capacity and are heated to temperatures considerably above 100°C, steam can be generated quickly and with high power. However, once the heated heat storage bodies have been cooled down during evaporation, the heat storage bodies need to be reheated, before new steam can be generated. Because of the large heat capacity of the heat storage bodies this may take considerable time.
  • splash-on-heater steam generators are known.
  • water is splashed onto a heater arranged within the oven or onto a dedicated heater.
  • the water evaporates by the heat generated by the heater.
  • Such a system can be provided within the baking chamber or externally.
  • the heaters may be electric heaters or gas heaters.
  • Such a system allows to quickly generate steam.
  • a disadvantage is that the steam amount is limited due to the limited heating power of the heater.
  • the heater recovers its temperature relative quickly, and steam can be created soon again.
  • the steam can be powerful enough for baking light crusted bread, but also to control a relative humidity by a finer and more frequent injection compared to a splash-on-material steam generator.
  • such a steam generator may be used to create a relatively moist atmosphere for example to bake soft Asian style bakery products or to prevent food from getting dry.
  • Splash-on-heater steam generators are used in combi steamers or in convection oven pipe generators.
  • Boiler steam generators include a water bath that is heated.
  • the heat source can be heat of the oven or a dedicated heating system. Water evaporates from the water bath.
  • a boiler steam generator is relatively slow for generating steam.
  • a disadvantage lies in the fact that the power of the energy source limits the maximum speed of steam generation. Also the system is quite slow, due to the thermal inertia of the water bath.
  • a boiler steam generator can create steam continuously and can be used to create and control a humid atmosphere. Boiler steam generators are used for example in proofers or in steam rooms.
  • an object of the invention to disclose an improved apparatus for baking bakery products with a steam generator that on the one hand allows to prepare crusty bakery products, such as European style bakery products.
  • the apparatus shall allow to provide a controlled, moist atmosphere that is necessary for baking soft bakery products, such as Asian style bakery products.
  • an oven comprising:
  • a oven chamber having an access opening for entering or removing bakery prod-ucts
  • At least one heater for heating the oven chamber
  • a steam generator for generating steam being coupled to the oven chamber for feeding steam into the oven chamber;
  • steam generator comprises:
  • a primary steam generator configured as a splash-on-material steam generator comprising a closed housing, wherein at least one heat storage body is arranged, further comprising at least one heater for heating the heat storage body, and at least one water feed line being configured for feeding water into the closed housing and for spraying water onto the heat storage body;
  • a secondary steam generator comprising at least one heater and at least one water feed line for feeding water towards the heater for generating steam continuously or intermittently.
  • a primary steam generator configured as a splash-on-material steam generator is provided for generating steam quickly and with high power to allow the preparation of crusty bakery products according to the European style.
  • the secondary steam generator that is provided in addition to the primary steam generator allows to generate steam continuously or intermittently, but at a slower rate.
  • the secondary steam generator can be used to create a controlled, moist atmosphere, which is necessary for preparing soft bakery products, such as Asian style bakery products.
  • the primary and the secondary steam generators may be arranged ex-ternally from the oven and may be linked with the oven chamber by at least one sealed steam duct, preferably by a combined steam duct.
  • the steam generators can be designed in a dedicated way to provide the needed steam amount continuously and at the same time instantaneously at a high rate, without any volume constraints. So the external steam generator can be designed specifically to fulfill the required needs for steam generation.
  • the primary and secondary steam generators are combined within a common housing.
  • one of the primary and secondary steam generators is arranged on top of the other, wherein preferably both steam generators have a common water drainage for removing excess water.
  • At least one of the primary and secondary steam generators is arranged within the oven.
  • the secondary steam generator which does not require that much space as the primary steam generator of the splash-on-material type may be arranged within the oven.
  • the primary steam generator comprises at least one metal bar, preferably a plurality of metal bars, heated by the at least one heater, wherein the at least one water feed line comprises outlet openings arranged for spraying water onto the at least one metal bar.
  • the primary and the secondary heaters are both of the splash-on-material steam generator type, wherein a controller is provided that is configured for feeding water in a burst mode to the primary heater for effecting steam generation in a short time upon demand, and wherein the controller is configured for feeding water in a pulsed mode to the secondary steam generator for generating steam at a lower volume-per-time unit and more continuously than effected by the primary steam generator.
  • the secondary steam generator in this case may be configured smaller and with a smaller overall heat capacity of the heat storage bodies, since the secondary heater requires only a steam output at a rate that is lower than provided by the primary heater.
  • the steam can be provided by the secondary heater in a way that is more continuously than the steam provided by the primary steam generator.
  • the secondary steam generator com-prises a closed housing, wherein at least one heater is arranged, and wherein the at least one water feed line is configured for feeding water onto the heater or onto a metal plate, in particular a water receptacle, placed in the close vicinity of the heater, and being heated by the heater, continuously or in regular intervals for effecting evaporation by contact with the heater or with the metal plate.
  • the secondary steam generator is configured as a splash-on-heater steam generator. It allows to provide steam at a lower rate than provided by the primary heater with the splash-on-material steam generator type, but in a more continuous way.
  • the secondary steam generator comprises at least one heater arranged within the oven, in particular within the oven chamber, or within a hollow space connected therewith, and wherein the at least one water feed line is arranged for spraying water onto the heater or onto a metal plate arranged in the vicinity thereof.
  • the secondary steam generator is integrated into the oven which leads to a simple and cost-effective design.
  • a heater for heating a water bath contained in a receptacle for effecting continuous evaporation, preferably further comprising a level control for feeding water into the water receptacle for keeping a predetermined fill level.
  • the secondary steam generator is of the boiler steam generator design. It allows for a continuous steam generation for creating a very humid atmosphere, if needed.
  • the secondary steam generator is combined with the primary steam generator within a closed housing, wherein the secondary steam generator comprises separate water outlet openings for spraying water onto at least one separate heater arranged within the closed housing.
  • Fig. 1 an apparatus according to the invention with an oven and an external steam generator according to the invention
  • Fig. 2 a perspective representation of the external steam generator
  • Fig. 3 a perspective representation of the external steam generator according to Fig. 2, wherein however, parts of the housing and of the secondary steam generator are removed for showing the design of the primary steam generator;
  • Fig. 4 a perspective representation according to Fig. 2, wherein however, parts of the housing of the secondary steam generator are removed for showing the interior design of the secondary steam generator;
  • Fig. 5 an enlarged cross section through the steam generator according to Fig. 2;
  • Fig. 6 a perspective end view of the steam generator according to Fig. 5 or, however after removing the end plate of the housing for allowing a look into the interior showing the common drainage of both steam generators;
  • Fig. 7 a schematic representation of a different external steam generator, wherein the primary and secondary steam generator are both of the splash-on-material type;
  • Fig. 8 a further embodiment of the invention, wherein the primary and secondary steam generators are combined into a common closed housing and
  • Fig. 9 another embodiment of the invention, wherein the secondary steam generator is configured as a boiler steam generator.
  • FIG. 1 an apparatus according to the invention is shown schematically and depicted in total with reference numeral 10.
  • the apparatus 10 comprises an oven 12 comprising an oven chamber 14 having an access opening 16 for entering or removing bakery products.
  • the access opening 16 is closed by a door 18 that can be closed or opened using a handle 19.
  • a blower 22 At the rear end of the oven chamber 14 there is arranged a blower 22 that is driven by a motor 24.
  • the oven chamber 14 comprises several electric heaters 20, 21 that are arranged at the top and at the bottom, in direct contact with the interior lining of the oven chamber 14 that may consist of stainless steel.
  • the oven chamber 14 further comprises a steam entry opening 26 at which a steam duct 40 ends.
  • the steam duct 40 outside of the rear end of the oven 12 comprises a flange coupling 38.
  • the steam generator 30 comprises a steam duct 36 that is coupled to the steam duct 40 inside the oven 12 via the flange coupling 38.
  • the steam generator 30 comprises a primary steam generator 32 and a secondary steam generator 34 arranged on top of the primary steam generator 32.
  • the primary steam generator 32 comprises a heater 44 and a water feed line 48 for feeding water into the primary steam generator 32.
  • a control valve 52 is coupled to the water feed line 48 for controlling the water feed.
  • the control valve 52 is controlled by a steam controller 42 which is coupled to the control valve 52 via a control line 56.
  • the secondary steam generator 34 also comprises a heater 46 and a water feed line 50 which is coupled to a control valve 54.
  • the control valve 54 is coupled to the steam controller 42 by means of a control line 58.
  • the oven 12 may have a central controller 28 that is coupled to the steam controller 42 by means of control lines 60, 62.
  • control valves 52, 54 may also be directly controlled by the central controller 28 of the oven 12.
  • the steam generator 30 is shown in perspective view.
  • the steam generator 30 consists of the primary steam generator 32 arranged at the bottom part having a closed housing 33.
  • the secondary steam generator 34 is arranged which also comprises a closed housing 35.
  • a common steam duct 36 that is internally connected to both steam generators 32, 34 and extends laterally from the secondary steam generator 34.
  • the common steam ducts 36 ends in a flange 37 to which a respective steam pipe can be coupled for connection to the flange coupling 38.
  • the primary steam generator 32 is heated by two heaters 44, 66 that enter into the housing 33 at an axial end thereof.
  • Each heater 44, 66 comprises two heat conductors 64, 65, and 67, 68, respectively, which extend parallel to each other and which in the internal end within the housing 33 are connected with each other by a U-type connection.
  • the secondary steam generator 34 comprises a heater 46 having two heat conductors 70, 71 that enter into the housing 35 from an axial end thereof.
  • the two heat conductors 70, 71 at an internal end are connected with each other in a U-type connection.
  • the two heaters 44, 66 are each configured as cartridge heaters, each comprising two heat conductor 64, 65, and 67, 68, respectively leading in and leading out.
  • the two cartridge heaters 44, 66 are arranged at the bottom of the housing 33 parallel to each other.
  • the water feed line 48 being configured as a water pipe extending above the metal bars 74 and having a plurality of outlet openings 78 that allow to spray water directly onto the metal bars 74.
  • the metal bars 74 are heated by the heaters 44, 66 up to a temperature considerably beyond 100°C, for instance up to a temperature of about 300°C to 400°C. If a sudden steam generation is desired, water is fed via the respective control valve 52 into the water feed line 48 or water pipe and is sprayed via the water outlet openings 78 onto the heated metal bars 74. This leads to an almost instantaneous steam generation at a high rate. It allows for preparing crusty bakery products.
  • the design of the secondary steam generator 34 can be seen in more detail from Figs. 4 and 5.
  • the secondary steam generator 34 is located on top of the primary steam generator 32, however has a smaller square cross section than has the primary heat generator 32 and is located somewhat offset in lateral direction.
  • the secondary steam generator 34 also comprises a closed housing 35 that is connected with the closed housing 33 of the primary steam generator 32.
  • a metal plate 76 in this case being configured as a rectangular water receptacle having a bottom and four walls extending upwardly therefrom.
  • the two heat conductors 70, 71 extend that at the end of the water receptacle 76 are connected with each other in a U-shape.
  • the water feed line 50 within the closed housing 35 extends from an axial end thereof as a short stud ending shortly behind the beginning of the water receptacle 76 (see Fig. 4) .
  • the water receptacle 76 is configured with a small decline towards the end opposite the water feed line 50 so that water output from the water feed line 50 is dispersed on the bottom of the water receptacle 76 almost evenly. If water is fed through the water feed line 50 into the water receptacle 76 when the respective control valve 54 is opened, the water evaporates upon contact with the water receptacle 76 and the generated steam is guided into the steam duct 36 through the respective steam opening 39 as shown in Fig. 4. Steam generated by the primary steam generator is guided into the common steam duct 36 via an opening 41 at the top of the housing 33 of the primary steam generator 32.
  • the steam generator 30 may comprise an overheating pro-tection comprising a sensor, as common in the art (not shown) .
  • the primary steam generator 32 and the secondary steam generator 34 having a common housing 33, 35.
  • the housing 33, 35 comprises a water drainage opening 80 leading from the axial end of the housing 35 of the secondary steam generator 34 through the bottom thereof into the housing 33 of the primary steam generator 32.
  • a common water drain 72 configured as a pipe leading to the outside and being configured for removing excess water into an associated line connected thereto.
  • the design of the apparatus 10 described above with reference to Figs. 1 to 6 describe a steam generator 30 with a primary steam generator 32 configured as splash-on-material steam generator in combination with a secondary steam generator 34 configured as a splash-on-heater steam generator.
  • the primary steam generator 32 is configured for generating steam quickly with high power to allow the preparation of crusty bakery products.
  • the secondary steam generator 34 of the splash-on-heater type allows to generate steam in a continuous or almost continuous way, however at a considerably lower volume per time unit than possible with the primary steam generator 32. So the secondary steam generator 34 is configured for making soft bakery products of the Asian style, while the primary steam generator 32 is configured for making crusty bakery products of the European style.
  • the combination of the primary and secondary steam generators 32, 34 may be varied in several ways, as explained in the following with respect to Figs. 7 to 9.
  • the steam generator 30a comprises a primary steam generator 32 and a secondary steam generator 34 which are both of the splash-on-material type.
  • the secondary steam generator 34 may be configured smaller than the primary steam gener-ator 32, since less steam generation per time unit is required than shall be possible by the primary steam generator 32.
  • the primary steam generator 32 may be controlled by the control valve 52 in a burst mode, i.e. with short admission of a high water quantity, so as to effect a quick generation of a relatively large amount of steam, as needed for making European style bakery products.
  • the secondary steam generator 34 may be controlled in a pulsed mode, i.e. supplying relatively small amounts of water repeatedly over a longer time. This allows a continuous or almost continuous evaporation of a smaller amount of water over time. Thus this mode is suitable for generating a relatively moist atmosphere over a relatively long time period, suitable for making soft bakery products according to the Asian style.
  • Fig. 8 a steam generator according another different design is depicted in total with 30b.
  • the steam generator 30b comprises a primary steam generator 32 that together with a secondary steam generator 34 is combined within a common housing 33.
  • the primary steam generator 32 is of the splash-on-material type as described above with reference to Fig. 5.
  • Within the common housing 33 there is a separate compartment 81 separated from the rest of the housing 35 by a plate 83.
  • Within the separate compartment 81 at the bottom there is a separate or dedicated heater 82.
  • the secondary steam generator 34 allows to produce steam by spraying small amounts of water directly onto the heater 82, thereby allowing a generation of small amounts of steam, but in continuous or almost continuous way, but independently from the steam generated by the primary steam generator 32 within the other (left) part of the housing 33.
  • Fig. 9 shows a different steam generator depicted in total with reference numeral 30c. Only the secondary steam generator 34 is shown.
  • the secondary steam generator 34 is of the boiler type having a closed housing 35 within which a water reservoir 90 is contained.
  • the water reservoir 90 is directly heated by two heaters 44, 66.
  • a water feed line 50 leads into the water reservoir 90.
  • the primary or secondary heater must not necessarily be configured as external heaters but may also be contained within the oven 12.
  • the secondary steam generator may be formed by one or more heaters directly contained within the oven chamber 14 or within a hollow space connected therewith. Water may be fed directly onto the heaters or onto a metal plate arranged in the vicinity thereof.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Commercial Cooking Devices (AREA)

Abstract

La présente invention concerne un appareil de cuisson de produits de boulangerie qui inclut un four (12) comprenant : une chambre de four (14) dotée d'une ouverture d'accès (16) permettant d'insérer ou retirer des produits de boulangerie ; une porte (18) destinée à fermer l'ouverture d'accès (16) ; un ou plusieurs dispositifs de chauffage (20, 21) destinés à chauffer la chambre de four (14) ; et un générateur de vapeur (30) destiné à générer de la vapeur, ledit générateur étant couplé à la chambre de four (14) de manière à introduire de la vapeur dans la chambre de four (14) et ledit générateur de vapeur (30) comprenant : un générateur de vapeur primaire (32) configuré sous la forme d'un générateur de vapeur pulvérisée sur des produits comprenant un boîtier fermé, dans lequel un ou plusieurs corps de stockage de chaleur sont agencés, comprenant en outre un ou plusieurs dispositifs de chauffage (44) destinés à chauffer le ou les corps de stockage de chaleur et une ou plusieurs conduites d'alimentation en eau (48) conçues pour introduire de l'eau dans le boîtier fermé (33) et pour pulvériser de l'eau sur le corps de stockage de chaleur ; et comprenant en outre un générateur de vapeur secondaire (34) doté d'un ou plusieurs dispositifs de chauffage (46) et d'une ou plusieurs conduites d'alimentation en eau (50) destinées à alimenter en eau le dispositif de chauffage (46) afin de générer de la vapeur en continu ou par intermittence.
PCT/CN2018/095119 2018-07-10 2018-07-10 Appareil de cuisson pour produits de boulangerie comprenant un générateur de vapeur WO2020010513A1 (fr)

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US11134808B2 (en) 2020-03-30 2021-10-05 Sharkninja Operating Llc Cooking device and components thereof
CN114251637A (zh) * 2020-09-21 2022-03-29 广东美的环境电器制造有限公司 蒸汽发生装置和控制方法、电器设备和可读存储介质
CN114251638A (zh) * 2020-09-21 2022-03-29 广东美的环境电器制造有限公司 蒸汽发生装置和控制方法、电器设备和可读存储介质
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CN115480600A (zh) * 2021-06-15 2022-12-16 广东美的环境电器制造有限公司 一种控制方法、装置、设备及计算机可读存储介质
US11627834B2 (en) 2017-08-09 2023-04-18 Sharkninja Operating Llc Cooking system for cooking food
US11751710B2 (en) 2019-02-25 2023-09-12 Sharkninja Operating Llc Guard for cooking system

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US11627834B2 (en) 2017-08-09 2023-04-18 Sharkninja Operating Llc Cooking system for cooking food
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US11751722B2 (en) 2019-02-25 2023-09-12 Sharkninja Operating Llc Cooking device and components thereof
US11134808B2 (en) 2020-03-30 2021-10-05 Sharkninja Operating Llc Cooking device and components thereof
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US11647861B2 (en) 2020-03-30 2023-05-16 Sharkninja Operating Llc Cooking device and components thereof
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CN114251638B (zh) * 2020-09-21 2023-12-12 广东美的环境电器制造有限公司 蒸汽发生装置和控制方法、电器设备和可读存储介质
CN114251637A (zh) * 2020-09-21 2022-03-29 广东美的环境电器制造有限公司 蒸汽发生装置和控制方法、电器设备和可读存储介质
CN114672974B (zh) * 2020-12-24 2023-11-14 广东美的环境电器制造有限公司 蒸汽发生装置及其控制方法、衣物处理装置和计算机介质
CN114672974A (zh) * 2020-12-24 2022-06-28 广东美的环境电器制造有限公司 蒸汽发生装置及其控制方法、衣物处理装置和计算机介质
CN115480600A (zh) * 2021-06-15 2022-12-16 广东美的环境电器制造有限公司 一种控制方法、装置、设备及计算机可读存储介质
CN115480600B (zh) * 2021-06-15 2024-02-23 广东美的环境电器制造有限公司 一种控制方法、装置、设备及计算机可读存储介质

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