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WO2007013031A2 - Grille-pain - Google Patents

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Publication number
WO2007013031A2
WO2007013031A2 PCT/IB2006/052547 IB2006052547W WO2007013031A2 WO 2007013031 A2 WO2007013031 A2 WO 2007013031A2 IB 2006052547 W IB2006052547 W IB 2006052547W WO 2007013031 A2 WO2007013031 A2 WO 2007013031A2
Authority
WO
WIPO (PCT)
Prior art keywords
toasting
products
housing
space
control unit
Prior art date
Application number
PCT/IB2006/052547
Other languages
English (en)
Other versions
WO2007013031A3 (fr
Inventor
Timotheus J. M. Van Aken
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2007013031A2 publication Critical patent/WO2007013031A2/fr
Publication of WO2007013031A3 publication Critical patent/WO2007013031A3/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/06—Roasters; Grills; Sandwich grills
    • A47J37/08—Bread-toasters

Definitions

  • the present invention relates to an apparatus for toasting bread and the like, comprising a housing that comprises an opening which issues into a toasting space for accommodation products to be toasted, a heating element for heating the products and a control unit for controlling the heating element.
  • the International Application WO 2004/039224 discloses such an apparatus, which controls the toasting process by repeated switching of the power of the heating element between high and lower levels. In order to obtain bread with a crisp-non moist interior the power level switches for example between 900W and 600W in at least four cycles.
  • US 2003/0075052A1 discloses a toaster, wherein a linear heat source scans the surface of a product to be toasted in two pass rates. The first pass rate is sufficient to drive moisture from the product but is insufficient to darken its surface. After the first pass rate the linear heat source reverses and scans the product at a second pass rate, which is sufficient to darken and toast the surface of the product.
  • the apparatus' in the prior art are all unsatisfactory with respect to reducing the water content during toasting.
  • the apparatus as disclosed in US 2003/0075052A1 for example dries a product to be toasted in the first step of the toasting process.
  • the toasting space will be relatively cold, especially when the apparatus has not been used for a while.
  • the heat generated by the heat source will be mainly used to heat up the walls defining the toasting space and other nearby components. Only when all these components are sufficiently heated the product reaches a critical temperature that is sufficient for drying it. However this temperature probably will be reached just at the end of the first step, seeing that the first pass rate is insufficient for darken the surface of the bread and thus the heat source will operate at a low level.
  • the present invention provides an apparatus for toasting bread and the like, which allows to effectively lower the moisture content of the bread, while allowing a controlled degree of browning of the surface of the bread.
  • the present invention therefore provides an apparatus according to the first paragraph, wherein the apparatus comprises a cooling device that is adapted to lower a temperature in the toasting space.
  • the cooling device allows lowering the temperature of the toasting space to a level that is sufficient for continued drying of the product without having the risk of burning the surface thereof.
  • control unit controls the cooling device. This allows for the control unit applying an additional drying step to the toasting process by activating the cooling device, and thus controlling the additional reduction of moisture content of the toasted products. Varying the duration of such a drying step or varying the amount of temperature reduction in the toasting space by means of varying a power level of the cooling device will vary the amount of water reduction of the product. Since use is made of the heat generated in preceding toasting cycles the additional dying step is very efficient.
  • the cooling device comprises a fan that is adapted to ventilate the toasting space.
  • a fan allows a very effective removal of the excessive heat in the toasting space and thus to lower the temperature thereof by a relatively simple technical measure. This is especially true when the fan establishes an airflow in the toasting space that is directed towards its opening. An airflow will remove the thin layer of moist that develops around the surface of the bread during the preceding cycle, which considerably enhances the effectiveness of the drying process.
  • the housing comprises a plurality of ventilating holes, which facilitates an efficient ventilation of the toasting space.
  • the housing comprises a lid, which is movable between an open position uncovering the opening and a closed position covering the opening.
  • the lid can advantageously be kept closed in the first part of the toasting process which will facilitate a rapid temperature increase in the toasting space in the first part of the toasting process. Another advantage is that by opening the lid when switching to the drying step the heat in the toasting space can escape more easily.
  • the apparatus comprises a transport device for holding and transporting the products between a first position wherein the products are located in the toasting space and a second position wherein the products are at least partially located outside the housing, the transportation device moving from the first position to the second position during cooling. The products then are partially located in the toasting space and partially extend outside the housing during the drying step.
  • the fan is arranged to generate an airflow that transports heat in a direction from the first position to the second position. This provides a very efficient manner to use the heat generated in the toasting space for drying the products.
  • the products on the one hand will rapidly cool down since they are partially located outside the housing. Simultaneously however the products will be heated in an even manner by means of hot air flowing along their surfaces. This allows imposing a temperature on the products that is sufficient for drying them while avoiding the risk of burning them.
  • the fan is located in one of two opposite sidewalls of the housing and the fan generates an airflow from said one sidewall towards the opposite sidewall. Since the opening issueing in the toasting space are usually disposed at the top surface of conventional toasting apparatus' and most components like the electronic circuitry and the control knobs are disposed in or at its side walls, this is an advantageous location for the fan. Moreover conventional toasting apparatus' are designed to keep their sidewalls relatively cool. This embodiment allows for an efficient removal of heat from the toasting space, especially when both sidewalls concerned comprises ventilating holes.
  • a measurement device is disposed in the toasting space, which device measures the temperature in the toasting space and is coupled to the control unit. This embodiment enables an improved control of the degree of browning of the bread simply by activating the cooling device when the toasting space reaches a critical temperature.
  • the heating element is adapted to function at different power levels and that the control unit lowers the power level of the heating element during cooling. Since the cooling device is meant to lower the temperature of the toasting space it is no problem if the heating element operates at lower power during the drying step. This will save energy. Provided that the temperature in the toasting space does not drop too much, since this would then hinder an effective drying, the power of the heating element can even be switched off.
  • an adjustment knob is provided at an outside of the housing, which adjustment knob is coupled to the control unit and controls the drying step by controlling an active period and/or a power level of the cooling device. This enables fine tuning the water content reduction of a product after toasting by means of tuning the adjustment knob.
  • Fig. 1 is a perspective schematic view showing an apparatus for toasting bread and the like according to a first preferred embodiment
  • Fig. 2 is a perspective schematic view showing an apparatus for toasting bread and the like according to a second preferred embodiment
  • Figs. 3a-c show graphs indicating the power level of the heating element, the power level of the cooling device and the temperature of the toasting space in a toasting apparatus according to the invention as a function of time.
  • Figs. 1 and 2 show two apparatus' 10,50 for toasting bread and the like according to preferred embodiments of the invention.
  • Each apparatus comprises a housing 12, which housing comprises an opening 14 that issues in a toasting space 16, a control unit (not shown), and a heating element 20, the latter component shown in Fig. 1 only.
  • Products 18 to be toasted, such as slices of bread, are accommodated in the toasting space and thus accessible through opening 14.
  • the drawings show sidewalls 28,30,36 as well as a top wall 34 of the housing 12.
  • the opening can also be shaped as two parallel slots, which is a common design for many toasting apparatus'.
  • the sidewall 36 and its opposite wall are preferably provided with transparent glass panels so that the toasting operation may be observed.
  • the control unit controls the heating element 20, which is adapted to rapidly increase the temperature in the toasting space.
  • This control unit can be any standard control unit that is commonly available and applied for these types of apparatus'.
  • Preferably it comprises a microprocessor wherein standard programs of the toasting cycle(s) are preprogrammed.
  • the heating element 20 comprises a ceramic rod, wound with a resistance wire. It is also possible to apply wires wound on an insulator plate, such as a mica plate. Other possible heating elements are halogen lamps, infrared emitters, induction heaters and microwave heaters. Although Fig. 1 shows just one heating element, usually the housing accommodates a number of heating elements. These elements are arranged in the housing so as to have an even distribution in temperature in the toasting space. Furthermore a number of aluminum plates (not shown) are usually disposed nearby the heating elements to reflect the heat towards the interior of the toasting space while preventing excessive heating of the sidewalls. The heating elements preferably functions within a certain range of power levels and/or can be separately operated.
  • Both apparatus' comprise a cooling device 42 that preferably comprises a fan 22, which is arranged in one of the walls of the housing so as to lower the temperature in the toasting space when it is activated.
  • the control unit controls the fan. By activating the fan the control unit applies an additional drying or cooling step to the toasting process.
  • the fan will ventilate the toasting space and consequently lower the temperature around the products 18. This temperature decreases to a level that is sufficiently high to further dry the products, but at the same time is sufficiently low to avoid blackening or burning their surfaces. By removing the moist air that surrounds the products the drying thereof improves considerably.
  • ventilation holes 24 or a wall ventilator are arranged in one or more of the side-, top- or bottom-walls of the housing 12.
  • the ventilation holes are disposed in the wall that accommodates the fan and the wall opposite to it.
  • ventilation holes are provided in the sidewalls 28 and 30.
  • sidewall 28 the ventilation holes are provided in the back side and thus not visible in Fig. 1.
  • the fan is preferably driven by an electromotor.
  • the fan 22 can be any fan that is commonly available provided it fits in one of the housing walls.
  • the heating element 20 is switched to a much lower power level during the drying step in order to save energy or can even be switched off. It is also possible to lower the output of one or more heating elements during the heating cycle in order to avoid the temperature in the heating space reaching a critical level with respect to burning of the products. This is discussed in more detail below.
  • the first preferred embodiment from Fig. 1 comprises two lids 26, which can be folded in and out to respectively cover and uncover opening 14.
  • lids 26 are closed during the first cycle or cycles of the toasting process in order to facilitate a rapid increase of the toasting space' temperature.
  • the control unit switches to the additional drying step the lids 26 are opened to facilitate transportation of heat in the toasting space to the outside world. Therefore the control unit controls the opening and closing of the lid.
  • the second preferred embodiment from Fig. 2 comprises a transportation device 54, which device is adapted to hold the products 18 and to transport them between a first position wherein the products are located in the toasting space 16 and a second position (shown in Fig. 2) wherein the products are at least partially located outside the housing.
  • the embodiment in Fig 1 preferably also has a transportation device (not shown) similar to device 54. The difference is that in the first embodiment the products extend outside the housing from the top wall 34 while in the second embodiment the products extend from the side wall 36.
  • the advantage with the second embodiment is that slices of bread can be covered with additional food products or sandwich fillings prior to the toasting process, which foods are toasted together with the bread.
  • Fig. 1 show the products in their second position, the products being partially located in the toasting space and partially extending outside the housing.
  • the fan is arranged so as to generate an airflow that transports the heat in a direction from the first position to the second position.
  • this could mean that guiding plates (not shown) are disposed in the toasting space 16 in order to direct the airflow towards sidewall 36.
  • This could be ceramic plates that for example are mounted between the transportation device 54 and the sidewall opposite to sidewall 36 and hinge in relation to these components when the transportation device moves. These plates can then advantageously also be used to reflect the heat generated by the heating elements and protect the sidewall opposite to sidewall 36 from getting overheated.
  • the transportation device preferably is adapted to transport the products to a third position also, wherein the products extend outside the housing somewhat further as compared to the second position.
  • the third position can then advantageously be used to indicated the end of the complete toasting process; when this happens the transportation device moves from the second to the third position.
  • the apparatus can also indicate the end of the toasting cycle with other signals like an audio or a light signal. It is possible to carry out the drying step while keeping the lids closed and/or keeping the transportation device in its first position. In this case the fan will function at higher power.
  • An adjustment knob 32 is mounted in one of the sidewalls of the housing. It can be a rotating knob (Fig. 2) or a sliding knob (Fig. 1). The knob is coupled to the control unit and controls the drying step by controlling an active period and/or a power level of the cooling device and/or a power level of the heating elements. In this way the amount of moisture reduction during the drying step can be tuned by means of tuning the adjustment knob.
  • An alternative is to provide a selection switch that switches between several toasting programs that are preprogrammed in the control unit. These programs for example range from programs resulting in very dry and crisp bread with a hard interior to programs resulting in more moist bread with a softer interior.
  • a sensor or measuring device is arranged in the housing.
  • This can for example be a color sensor that can measure the degree of browning of the surface of the products to be toasted.
  • Other useful sensor types are Infrared sensors or smell sensors.
  • a temperature device such as a thermocouple or a thermostat, to measure a temperature in the toasting space.
  • Such devices send an input signal corresponding to the measured quantity to the control unit.
  • the control unit uses this signal to activate the cooling device and/or to lower the power level of the heating elements.
  • Figs 3a-c show graphs that respectively indicate the power level of the heating element, the power level of the cooling device and the temperature of the toasting space as a function of time.
  • t 2 is at 45-60 seconds after starting the toasting process, while the time period between t 2 and t 3 takes 0-45 seconds.
  • the heating elements operate at power levels ranging between 800-2400W during the first cycle prior to the drying step.
  • the temperature in the toasting space preferably does not exceed 500 0 C, which temperature is measured on the ceramic rod or insulator plate.
  • the corresponding average air temperature in the toasting space is approximately 300 0 C.
  • the water content in the bread is further reduced during the additional drying step by 10-20 % per minute with a maximum water loss of 25% (percentages related to the total weight of the product).
  • the water content decreases with approximately 10% depending on the power of the heating elements.
  • the water content decreases more in the additional drying step than in the preceding toasting cycle.
  • the housing preferably accommodates a temperature sensor measuring the temperature in the toasting space.
  • a preprogrammed or a pre-selected level of maximum temperature in the toasting space T 1 together with the selected power level(s) of the heating elements determine time t 2 .
  • time t 3 be determined by a pre-programmed or a preselected level of the minimum temperature in the toasting space T 2 together with the activity of the cooling device. It will be clear that this ensures that the temperature that is experienced by the products to be toasted is always kept within a fixed and pre-determined range. This in contrast to the apparatus disclosed in WO 2004/039224 and US 2003/0075052A1, in which case the power level of the heating elements and the times ti-t 3 are pre-programmed or preselected, which together determine the level OfT 1 .
  • the degree of browning on the one hand and the total reduction in water content on the other can be pre-selected more or less independently.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

L'invention concerne un grille-pain (10,50) servant à griller du pain et des produits analogues. Ce grille-pain comprend un boîtier (12) qui comprend une ouverture (14) aboutissant à un espace de grillage (16) servant à recevoir les produits (18) destinés à être grillés, un élément chauffant (20) servant à chauffer les produits et une unité de commande servant à régler l'élément chauffant. Le grille-pain comprend un dispositif de refroidissement (42) servant à abaisser la température de l'espace de grillage (16). L'unité de commande permet de commander le dispositif de refroidissement et ajoute une étape de séchage au processus de grillage en activant le dispositif de refroidissement (42). Le dispositif de refroidissement (42) dispose d'un ventilateur (22) servant à ventiler l'espace de grillage (16).
PCT/IB2006/052547 2005-07-26 2006-07-25 Grille-pain WO2007013031A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05106840.1 2005-07-26
EP05106840 2005-07-26

Publications (2)

Publication Number Publication Date
WO2007013031A2 true WO2007013031A2 (fr) 2007-02-01
WO2007013031A3 WO2007013031A3 (fr) 2007-07-05

Family

ID=37683726

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/052547 WO2007013031A2 (fr) 2005-07-26 2006-07-25 Grille-pain

Country Status (1)

Country Link
WO (1) WO2007013031A2 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2004088C2 (nl) * 2010-01-13 2011-07-14 Princess Household Appliances B V Inrichting en werkwijze voor het roosteren van een snede gebak.
US20120114818A1 (en) * 2009-09-09 2012-05-10 Prince Castle LLC Method of toasting a bread product using an edge toasting shield
WO2014199169A1 (fr) * 2013-06-13 2014-12-18 Kenwood Limited Grille-pain électrique amélioré
WO2015004445A1 (fr) * 2013-07-09 2015-01-15 Strix Limited Appareil pour chauffer un aliment
WO2016110713A1 (fr) * 2015-01-09 2016-07-14 Strix Limited Appareil pour chauffer un aliment
WO2016201644A1 (fr) * 2015-06-17 2016-12-22 Top Electric Appliances Industrial Ltd. Grille-pain
DE102019210149A1 (de) * 2019-07-10 2021-01-14 BSH Hausgeräte GmbH Brotröster, Verschluss für einen Brotröster sowie Verfahren zum Rösten von Röstgut
CN112384113A (zh) * 2018-06-29 2021-02-19 布瑞威利私人有限公司 烤面包机
US11284745B2 (en) 2018-06-21 2022-03-29 Marmon Foodservice Technologies, Inc. Infrared toaster
US11677901B2 (en) 2019-03-12 2023-06-13 Marmon Foodservice Technologies, Inc. Infrared toaster

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339183A (en) * 1941-10-17 1944-01-11 Proctor & Schwartz Inc Toaster
GB641853A (en) * 1947-05-17 1950-08-23 Hoover Ltd Improvements relating to electric toasters
US6753510B2 (en) * 2002-04-19 2004-06-22 Salton, Inc. Methods and systems for quickly heating items
ITMI20021188A1 (it) * 2002-05-31 2003-12-01 De Longhi Spa Apparecchio per la cottura di toast
US7351939B2 (en) * 2004-03-19 2008-04-01 Whirlpool Corporation Toaster

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120114818A1 (en) * 2009-09-09 2012-05-10 Prince Castle LLC Method of toasting a bread product using an edge toasting shield
NL2004088C2 (nl) * 2010-01-13 2011-07-14 Princess Household Appliances B V Inrichting en werkwijze voor het roosteren van een snede gebak.
CN105283105B (zh) * 2013-06-13 2019-01-01 凯伍德有限公司 改进的电烤面包机
WO2014199169A1 (fr) * 2013-06-13 2014-12-18 Kenwood Limited Grille-pain électrique amélioré
CN105283105A (zh) * 2013-06-13 2016-01-27 凯伍德有限公司 改进的电烤面包机
WO2015004445A1 (fr) * 2013-07-09 2015-01-15 Strix Limited Appareil pour chauffer un aliment
CN105358023A (zh) * 2013-07-09 2016-02-24 施特里克斯有限公司 用于加热食物的设备
US10682014B2 (en) 2013-07-09 2020-06-16 Strix Limited Apparatus for heating food
AU2016205898B2 (en) * 2015-01-09 2019-02-14 Strix Limited Apparatus for heating food
CN107105940A (zh) * 2015-01-09 2017-08-29 施特里克斯有限公司 食品加热装置
CN107105940B (zh) * 2015-01-09 2020-03-10 施特里克斯有限公司 食品加热装置
WO2016110713A1 (fr) * 2015-01-09 2016-07-14 Strix Limited Appareil pour chauffer un aliment
US11234559B2 (en) 2015-01-09 2022-02-01 Strix Limited Apparatus for heating food
WO2016201644A1 (fr) * 2015-06-17 2016-12-22 Top Electric Appliances Industrial Ltd. Grille-pain
US11284745B2 (en) 2018-06-21 2022-03-29 Marmon Foodservice Technologies, Inc. Infrared toaster
US11793356B2 (en) 2018-06-21 2023-10-24 Marmon Foodservice Technologies, Inc. Infrared toaster
CN112384113A (zh) * 2018-06-29 2021-02-19 布瑞威利私人有限公司 烤面包机
US11677901B2 (en) 2019-03-12 2023-06-13 Marmon Foodservice Technologies, Inc. Infrared toaster
US12088954B2 (en) 2019-03-12 2024-09-10 Marmon Foodservice Technologies, Inc. Infrared toaster
DE102019210149A1 (de) * 2019-07-10 2021-01-14 BSH Hausgeräte GmbH Brotröster, Verschluss für einen Brotröster sowie Verfahren zum Rösten von Röstgut
DE102019210149B4 (de) 2019-07-10 2022-09-01 BSH Hausgeräte GmbH Brotröster, Verschluss für einen Brotröster sowie Verfahren zum Rösten von Röstgut

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