EP2306093A2 - Appareil de cuisson doté d'un composant chauffant en fonctionnement et d'un ventilateur à air frais ainsi que procédé de refroidissement d'un composant chauffant en fonctionnement d'un appareil de cuisson - Google Patents

Appareil de cuisson doté d'un composant chauffant en fonctionnement et d'un ventilateur à air frais ainsi que procédé de refroidissement d'un composant chauffant en fonctionnement d'un appareil de cuisson Download PDF

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Publication number
EP2306093A2
EP2306093A2 EP10178415A EP10178415A EP2306093A2 EP 2306093 A2 EP2306093 A2 EP 2306093A2 EP 10178415 A EP10178415 A EP 10178415A EP 10178415 A EP10178415 A EP 10178415A EP 2306093 A2 EP2306093 A2 EP 2306093A2
Authority
EP
European Patent Office
Prior art keywords
component
cooling
peltier element
air blower
cooling air
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP10178415A
Other languages
German (de)
English (en)
Other versions
EP2306093A3 (fr
Inventor
Klaus Dengler
Felix Hangl
Martin-Ernst Steinbeck
Markus De Vries
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2306093A2 publication Critical patent/EP2306093A2/fr
Publication of EP2306093A3 publication Critical patent/EP2306093A3/fr
Ceased legal-status Critical Current

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Classifications

    • 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
    • F24C15/006—Arrangements for circulation of cooling air
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/642—Cooling of the microwave components and related air circulation systems

Definitions

  • the invention relates to a cooking appliance with a heating during operation component, and a cooling air blower, with which the component is cooled. Furthermore, the invention relates to a method for cooling a component of a cooking appliance which heats up during operation, in which the component is cooled at least temporarily in an activated state of the component with a cooling-air blower of the cooking appliance.
  • the cooking appliance embodied as a cooking hob has at least one heat pipe, which belongs to the cooling unit and is designed for cooling.
  • the cooking appliance can also have a fan, which is provided for heat dissipation from the heat pipe or which is designed for cooling a further component unit.
  • This operation can also take a relatively long time and is associated with a generation of noise by the cooling air blower. It may therefore be annoying for a user.
  • An inventive cooking appliance has at least one component which heats up during operation.
  • the cooking appliance also includes a cooling air blower, with which this is warming in operation component cooled.
  • the cooking appliance comprises at least one Peltier element.
  • the cooking appliance is embodied such that the component which heats up during operation is at least partially cooled by this at least one Peltier element in the switched-off operating state of the component in a cooling-air fan follow-up time.
  • the Peltier element can be operated silently in addition to its extremely compact and thus space-saving design, the possibly disturbing noise of the current cooling air blower can at least be reduced, in particular also reduced in time.
  • such a Peltier element allows a particularly effective cooling, because it creates a temperature difference due to its basic functionality and design with applied electrical energy, which allows this cooling effect on the component where the cooling is desired.
  • a very energy-efficient operation can thus be made possible, since the energy requirement of the cooling air blower can be at least significantly reduced.
  • the cooling with the Peltier element begins with the shutdown of the heated in operation component. Immediately following the shutdown is thus already begun with the cooling by the Peltier element, whereby a very fast cooling effect can be achieved and beyond the possibly required further operation of the cooling air blower in time and intensity, which means in terms of the required speed, at least significantly reduced.
  • the component is at least temporarily cooled by the at least one Peltier element and the cooling air blower.
  • the at least one Peltier element and the cooling air blower are operated, a particularly rapid cooling effect can be achieved.
  • the cooling air blower in an energy-reduced operation can be used, thereby also the speed of the fan can be reduced, thereby significantly reducing the noise can be reduced.
  • the cooling air blower is completely switched off in the cooling-air blower delay time. It is thus deactivated by switching off the heating during operation component and the cooling air blower, whereby a complete avoidance of a disturbing cooling air fan noise in the cooling air blower delay time and thus after switching off the warming in operation component is guaranteed.
  • the cooking appliance has a control unit which is electrically connected to the Peltier element.
  • the Peltier element is controlled by the control unit with regard to its operating mode.
  • the control unit is designed such that the duration of the cooling of the component with the Peltier element in the cooling air blower delay time and / or the times at which the cooling of the component with the Peltier element in the cooling air blower delay time starts and ends , controllable.
  • This control of the operation of the Peltier element with the control unit preferably takes place as a function of specific parameters, in particular as a function of the temperature of the component which is heating during operation at the switch-off time.
  • this temperature may also be taken into account as a decision criterion for the control of the Peltier element for a period of time before the switch-off and for a period of time after the switch-off. If, for example, the component is switched off within a temperature interval which is predetermined and stored, the operation of the Peltier element and / or the cooling air blower in the cooling-air blower follow-up time can be controlled very efficiently and depending on the situation, depending on this actual temperature. If the temperature is relatively low, the operation of the cooling-air blower in the cooling-air blower delay time may possibly be completely dispensed with.
  • the time and cooling can be controlled with the Peltier elements very dosed, also be dispensed with in this case, if necessary, the cooling fan as an additional cooling unit can. If several Peltier elements are present or if they are dimensioned very strongly with regard to their cooling possibilities, then, even at relatively high temperatures, the component which heats during operation may be cooled by the Peltier elements in the cooling-air blower delay time.
  • the sequence of cooling of the component in the cooling-air blower delay time with the Peltier element and the cooling-air blower can in turn be set individually by the control unit depending on specific parameters or specifications. For example, cooling may then be started, for example, first with the cooling-air blower and, after a relatively short time, switched off and then continued with the at least one Peltier element with the further cooling in the cooling-air blower delay time. It can also be provided that in alternating cooling operation, the Peltier element and the cooling air blower are operated in the cooling air blower follow-up time.
  • the component of the cooking appliance which heats up during operation is a high-voltage component, in particular an inverter of a microwave oven.
  • Such specific switching power supplies are required in microwave ovens. Especially these develop during operation a lot of heat, so that a very specific cooling is required. Just when the operation of the microwave oven and in particular of the switching power supply is switched off after an active operation, a specific cooling is required.
  • the Peltier element is arranged electrically isolated from the component.
  • Safety-critical operations or impairment of the operation of the Peltier element can be prevented, in particular is between the Peltier element and the component, in particular a power semiconductor device of the switching power supply of the microwave device, a spacer arranged, which is formed of an electrically insulating and highly thermally conductive material.
  • the spacer element is a ceramic material which comprises, for example, aluminum oxide.
  • the Peltier element is glued by an electrically insulating and thermally conductive adhesive on the power semiconductor device.
  • an epoxy adhesive is possible here.
  • pastes, such as silicone paste, are possible, which also have electrically insulating and highly thermally conductive properties.
  • the Peltier element is preferably supplied with energy by an external energy source, in particular an external energy supply network.
  • the cooking appliance is usually coupled to this external power supply network and receives from this the energy.
  • the Peltier element is powered by a device-internal energy source, in particular an energy recovery device with energy.
  • a device-internal energy source in particular an energy recovery device with energy.
  • the Peltier element is contacted both with the component to be cooled and during operation heating and with a cooler further component, for example an explicit cooling surface or a housing part or the like, whereby the temperature difference is generated at applied current to the Peltier element.
  • a cooler further component for example an explicit cooling surface or a housing part or the like
  • the Peltier element is thus activated as a function of the operating state and designed to cool the component in the cooling-air blower delay time.
  • the cooling-air blower can also be designed with smaller and lower cooling-air power. This can save space and costs. However, it is very important that the cooling-air fan run-on time can be significantly reduced. Furthermore, the service life, in particular of the cooling air blower, can be extended.
  • a method according to the invention for cooling a component of a cooking appliance which heats up during operation in which the component is cooled at least temporarily in an activated state of the component with a cooling air blower of the cooking appliance, the component is at least partially in a switched-off operating state at least partially in a cooling air blower follow-up time cooled by at least one Peltier element.
  • the cooling of the component is started with the Peltier element with the switching off of the component.
  • the cooling with the Peltier element and the cooling air blower is performed at least temporarily in the cooling-air blower delay time.
  • the time duration of the cooling of the component with the Peltier element in the cooling air blower delay time and / or the times, including the cooling of the component with the Peltier element in the cooling air blower delay time is started and stopped, controlled by a control unit of the cooking appliance, in particular controlled depending on the temperature of the component when switching off and / or in a time interval shortly before switching off and / or in a time interval shortly after switching off.
  • a control unit of the cooking appliance in particular controlled depending on the temperature of the component when switching off and / or in a time interval shortly before switching off and / or in a time interval shortly after switching off.
  • further parameters may be taken into account in order to carry out the control of the time duration and / or the times.
  • the electric energy that can be supplied for operating the Peltier element can also be taken into account here.
  • a corresponding control of the Peltier element can take place in the event of a failure of this energy network.
  • a power semiconductor device of a high-voltage switching power supply of a microwave device for preparing food is cooled, wherein the Peltier element is electrically isolated from the power semiconductor device, in particular between the Peltier element and the power semiconductor device is a Distance element formed of an electrically insulating and highly thermally conductive material.
  • FIGURE shows a simplified sectional side view through a household appliance, which is designed as a microwave oven 1 for preparing food.
  • the microwave oven 1 comprises a preparation space or cooking space 2 into which foodstuffs can be introduced for preparation.
  • the cooking chamber 2 is through a Muffle 3 limited, which has a ceiling 4, a rear wall 5 and a bottom 6 and unspecified side walls.
  • the muffle 3 is formed with a feed opening 7, which can be closed by a door 8.
  • the microwave device 1 comprises an operating module 9, which has at least one operating element 10, which can be actuated by a user and is accessible from the front.
  • the operating element 10 is connected to a circuit carrier 11, which is arranged in the microwave device 1.
  • the circuit carrier 11 comprises a plurality of power semiconductor components, one of which is provided with the reference numeral 12.
  • the power semiconductor components 12 are functionally associated with a switching power supply of the microwave device 1, wherein the magnetron, which is not shown, is operable with the switching power supply, which is also referred to as an inverter.
  • the microwave device 1 comprises a cooling air blower 13, which is arranged to generate a cooling air flow for the circuit carrier 1 and thus also for the power semiconductor components 12.
  • the microwave device 1 comprises at least one Peltier element 14.
  • the Peltier element 14 is electrically connected to a control unit 15 and is supplied with electrical energy by this control unit 15.
  • the Peltier element 14 is thermally coupled to the power semiconductor device 12 which heats up during operation and is also thermally coupled to a cooler temperature medium, for example a housing wall, of the microwave device. Due to this thermal coupling with two components located at different temperature levels, cooling of the power semiconductor component 12 is achieved by the mode of operation of the Peltier element 14.
  • the cooling air blower 13 is also connected to the control unit 15 and is controlled by this.
  • the microwave device 1 is also electrically connected to an external power supply network N.
  • the power semiconductor device 12 In operation of the microwave device 1, the power semiconductor device 12 is operated in the active state and thereby heats up. In this active operating phase, cooling is generated via the cooling-air blower 13. For example, is the preparation process finished in the cooking chamber 2 food to be finished, and the power semiconductor device 12 is no longer operated in active mode and thus virtually disabled. Since it has warmed up during operation, active cooling must be carried out even after switching off this power semiconductor component 12. Cooling of the power semiconductor component 12 takes place at least temporarily and at least proportionally by means of the at least one Peltier element 14 in this immediate after cooling of the power semiconductor device 12 cooling air blower follow-up time.
  • cooling air blower follow-up time which, by definition, extends after switching off the power semiconductor component 12 and begins with this switching off of this component 12.
  • the cooling air blower 13 is still operated for a certain period of time in conventional microwave ovens, so that the power semiconductor component 12 the cooling air flow is cooled even after switching off after an active operation.
  • the cooling with the Peltier element 14 is at least partially carried out.
  • the entire cooling of the power semiconductor components 12 or 12 in the cooling air blower follow-up time exclusively by the Peltier elements 14 or a Peltier element 14th be performed without a further active cooling contribution through the cooling air blower 13.
  • a control can take place via the control unit 15, this control taking place depending on specific parameters, in particular the temperature of the power semiconductor component 12 shortly before and / or at and / or shortly after switching off the power semiconductor component 12.
  • the Peltier element 14 is arranged electrically insulated from these power semiconductor components 12 to be cooled.
  • the Peltier element 14 is not in direct contact with the power semiconductor component 12 is and between the power semiconductor device 12 and the Peltier element 14, a spacer 16 is formed.
  • This spacer element 16 is formed of an electrically insulating and highly thermally conductive material.
  • the spacer element 16 is an adhesive.
  • the Peltier element 14 is supplied with energy via the external power supply network N via the control unit 15.
  • the Peltier element 14 is at least partially supplied with energy via a device-internal energy recovery device 17.
  • this energy recovery device 17 is configured to convert heat into electrical energy.
  • a coupling with the muffle 3 may be provided.
  • the energy recovery device 17 comprises at least one further Peltier element (not shown) which, in addition to the thermal coupling with the muffle 3, is also thermally coupled to a further temperature medium.
  • an electric current is generated due to the self-adjusting temperature difference, so that the energy recovery device 17 is a thermoelectric generator.
  • This generated electrical energy can then be provided to the Peltier element 14, which is intended for cooling.
  • the Peltier element 14 in the cooling air blower delay time, the noise of the Cooling air blower 13 at least reduced, possibly completely prevented.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)
  • Electric Ovens (AREA)
EP10178415.5A 2009-10-02 2010-09-22 Appareil de cuisson doté d'un composant chauffant en fonctionnement et d'un ventilateur à air frais ainsi que procédé de refroidissement d'un composant chauffant en fonctionnement d'un appareil de cuisson Ceased EP2306093A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009045296A DE102009045296A1 (de) 2009-10-02 2009-10-02 Gargerät mit einer sich im Betrieb erwärmenden Komponente und einem Kühlluftgebläse sowie Verfahren zum Kühlen einer sich im Betrieb erwärmenden Komponente eines Gargeräts

Publications (2)

Publication Number Publication Date
EP2306093A2 true EP2306093A2 (fr) 2011-04-06
EP2306093A3 EP2306093A3 (fr) 2018-01-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10178415.5A Ceased EP2306093A3 (fr) 2009-10-02 2010-09-22 Appareil de cuisson doté d'un composant chauffant en fonctionnement et d'un ventilateur à air frais ainsi que procédé de refroidissement d'un composant chauffant en fonctionnement d'un appareil de cuisson

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EP (1) EP2306093A3 (fr)
DE (1) DE102009045296A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1601236A2 (fr) 2004-05-27 2005-11-30 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de cuisson comprenant une unité de refroidissement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3144493A1 (de) * 1981-11-09 1983-05-19 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Gargeraet, insbesondere backofen
KR960015463B1 (ko) * 1992-06-01 1996-11-14 마쯔시다덴기산교 가부시기가이샤 고주파가열장치
US5419780A (en) * 1994-04-29 1995-05-30 Ast Research, Inc. Method and apparatus for recovering power from semiconductor circuit using thermoelectric device
JP2002253422A (ja) * 2001-03-05 2002-09-10 Zojirushi Corp 炊飯器
JP2004208741A (ja) * 2002-12-27 2004-07-29 Hitachi Hometec Ltd 炊飯器
US9219213B2 (en) * 2005-03-29 2015-12-22 Koninklijke Philips N.V. Cooking stoves
JP2009121797A (ja) * 2007-11-19 2009-06-04 Toshiba Corp 加熱調理器

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1601236A2 (fr) 2004-05-27 2005-11-30 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de cuisson comprenant une unité de refroidissement

Also Published As

Publication number Publication date
DE102009045296A1 (de) 2011-04-07
EP2306093A3 (fr) 2018-01-03

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