EP0926447B1 - Appareil de cuisson avec recirculation de chaleur - Google Patents

Appareil de cuisson avec recirculation de chaleur Download PDF

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Publication number
EP0926447B1
EP0926447B1 EP98120408A EP98120408A EP0926447B1 EP 0926447 B1 EP0926447 B1 EP 0926447B1 EP 98120408 A EP98120408 A EP 98120408A EP 98120408 A EP98120408 A EP 98120408A EP 0926447 B1 EP0926447 B1 EP 0926447B1
Authority
EP
European Patent Office
Prior art keywords
heat
carrier fluid
compressor
heat carrier
cooking
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.)
Expired - Lifetime
Application number
EP98120408A
Other languages
German (de)
English (en)
Other versions
EP0926447A1 (fr
Inventor
Peter Kohlstrung
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.)
Rational AG
Original Assignee
Rational AG
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Filing date
Publication date
Application filed by Rational AG filed Critical Rational AG
Publication of EP0926447A1 publication Critical patent/EP0926447A1/fr
Application granted granted Critical
Publication of EP0926447B1 publication Critical patent/EP0926447B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F24C15/32—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

Definitions

  • the invention relates to a cooking device with one of a heat transfer fluid flowed through heat exchanger for direct or indirectly heating a cooking medium that is constantly in the Cooking space is circulated and for example hot air, steam or can be a mixture of hot air and steam.
  • a heat transfer fluid flowed through heat exchanger for direct or indirectly heating a cooking medium that is constantly in the Cooking space is circulated and for example hot air, steam or can be a mixture of hot air and steam.
  • a heat transfer fluid flowed through heat exchanger for direct or indirectly heating a cooking medium that is constantly in the Cooking space is circulated and for example hot air, steam or can be a mixture of hot air and steam.
  • a heat transfer fluid flowed through heat exchanger for direct or indirectly heating a cooking medium that is constantly in the Cooking space is circulated and for example hot air, steam or can be a mixture of hot air and steam.
  • the Combustion gases are passed through a heat exchanger, which the cooking medium through direct heat exchange or indirect, e.g.
  • a temperature increase can in principle be supplied to a medium by a compressor become.
  • a compressor For example, from US 3,988,905 is a simply constructed, based on the compression principle working energy cell known that a heat transfer fluid return includes.
  • a compressor for increasing the temperature of the heat transfer fluid by compression which is arranged upstream of the heating heat exchanger is a closed circuit for the heat transfer fluid, being downstream of a relaxation system upstream of the compressor and the heat exchanger is provided to relax the compressed heat transfer fluid, and a device for preheating the heat transfer fluid upstream of the compressor.
  • the heat transfer fluid is preferably air; however it can other fluids, e.g. Butane or known from heat pumps Fluids.
  • the heat transfer to the cooking medium can be directly or indirectly e.g. over a second Circuit of a heat transfer fluid, by heating water, is obtained from the steam for the cooking medium, or in other suitable way,
  • the invention can provide that the preheating device or has several process heat exchangers, which at least part of the waste heat from the cooking device to the heat transfer fluid respectively.
  • a heater can be used for the heat transfer fluid upstream of the compressor be provided and / or a device for Feeding of already heated heat transfer fluid upstream be provided by the compressor.
  • a cooking device in which a process heat exchanger from is flowed through the heat transfer fluid, which is a heat exchange between the heat transfer fluid and one from the cooking space outflowing cooking medium allowed.
  • a cooking device can also be provided which the preheater a process heat exchanger for Has heating the heat transfer fluid through the ambient air.
  • the preheating device has a counterflow heat exchanger in which a Heat exchange between the flowing from the heat exchanger compressed, i.e. not relaxed heat transfer fluid and the heat transfer fluid flowing to the compressor takes place.
  • the heating device is a Device for supplying the heat transfer fluid to various Has heat exchangers and / or heating devices.
  • the cooking device according to the invention can continue in the flow system the heat transfer fluid preferably thermally insulated pressure spokes for compressed heat transfer fluid downstream of the compressor and upstream have of the heat exchanger. This allows for one driving impulses and the other one discontinuous operation of the compressor.
  • the waste heat of the device as well as the heat of the emerging Cooking medium, in particular that emerging in the fume hood Vapors to "transform" to a higher temperature level and thus usable for the cooking process. If in a process heat exchanger the heat of the outside Vapors is recovered, there is the advantage that no cooling of these vapors is required.
  • the heat of the emerging vapors and, if applicable, that of the environment emitted waste heat can be used, but also through a correspondingly arranged heat exchanger, the heat, that of components of the cooking device, in particular of the Compressor and / or the relaxation system is generated.
  • the flow system according to the invention for the heat transfer fluid with compressor and heat exchanger can additionally to a conventional heating system, e.g. with a gas burner, provided a.
  • a conventional heating system can, however, also, for example via a heat exchanger, coupled to the flow system for the heat transfer fluid his.
  • the cooking device is, for example, a Hot air device or a combined steam / hot air device can, shown only schematically. It has one here only schematically shown cooking space 1 and a blower 2 for circulating the cooking medium, e.g. Hot air, steam or a Mixture of steam and hot air.
  • Cooking medium flows around the heat transfer surface of a Heating heat exchanger 3, in which a heat transfer fluid, preferably Air or butane, flows.
  • the direction of flow is indicated by the arrows in the figures.
  • the cooking device owns still a device sequence 5, through which the uncondensed Parts of the cooking medium leave the device.
  • the heat exchanger 3 forms part of a circulatory system for the heat transfer fluid.
  • the heat exchanger 3 upstream is a compressor 10 for compression and thus Heating the heat transfer fluid.
  • the heat exchanger 3 is a relaxation system 12 downstream, which compressed heat transfer fluid relaxes again after it has left the heat exchanger 3.
  • the relaxation system 12 is followed by a multi-way valve 14, via the the expansion device 12 with a process heat exchanger 16 either directly or via a regenerator 18 can be.
  • a process heat exchanger 16 takes place a heat exchange between the through the outlet 5 from the Cooking device escaping cooking medium and the heat transfer fluid instead of.
  • the heat transfer fluid coming from the process heat exchanger 16 is compressed so far in the compressor 10 that its Temperature above the temperature of the circulated cooking medium lies, the temperature difference is greater, depending the heat transfer fluid is compressed more. Typical temperatures of the cooking medium in operation are in one area from 200 ° C to 400 ° C.
  • the one leaving the compressor 10 Heat transfer fluid then flows through the heat exchanger 3 and gives due to the generated by the compressor 10 Temperature difference to the cooking medium heat to the cooking medium from which by the circulation fan 2 on the transfer surface of the heat exchanger is driven past. This heats up the cooking medium while the heat transfer fluid that is still under high pressure, cools.
  • the pressure of the Reduced heat transfer fluid leaving heat transfer fluid 3 which is accompanied by a decrease in temperature.
  • a typical temperature of the heat transfer fluid after relaxation would be 10 ° C to 20 ° C.
  • the temperature of the relaxation system 12 leaving heat transfer fluid is now under the temperature of the cooking medium leaving the cooking appliance and flows through the process heat exchanger 16 and in Operation when leaving the cooking space typically a temperature in the range from 100 ° C to 300 ° C.
  • the direct circuit shown in Fig. 1 flows out of the relaxation system 12 escaping heat transfer fluid directly to the process heat exchanger 16 and there on the temperature of the cooking medium escaping via outlet 5 is heated. Thereafter, it becomes the compressor 10 again in the circuit where it is compressed as described above, so that its temperature is again above the temperature of the Cooking medium increased.
  • Waste heat is available through the process heat exchanger 16 could be used, it can be provided that Heat transfer fluid from another heat source, e.g. Legs Additional heating or to heat the ambient air. Such Additional heating could for example be between the process heat exchanger 16 and the compressor 10 may be provided. Preheating using the ambient air is shown Embodiment with the help of the regenerator 18th possible.
  • the multi-way valve 14 can be shown in FIG. 2 position shown, which causes the Heat transfer fluid not directly, but via the regenerator 18 is fed to the process heat exchanger (16).
  • the regenerator 18 is essentially a heat exchanger to exchange heat between the heat transfer fluid and the ambient air. If air is used as the heat transfer fluid, the regenerator 18 may also have an inlet for ambient air and have an outlet for air from the circuit which about a further position, not shown, of the multi-way valve 14, via valves of the regenerator 18 or others can be opened and closed in a suitable manner and with which the cooled in the relaxation system 12 Have air replaced by warmer ambient air, as long as none substantial heating in the process heat exchanger 16 takes place.
  • the heat transfer fluid which the relaxation system 12 leaves a temperature in the range of 0 ° C.
  • the Process heat exchanger 16 with an electric heater or the like be equipped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Central Heating Systems (AREA)
  • Cookers (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Commercial Cooking Devices (AREA)

Claims (8)

  1. Appareil de cuisson avec
    un échangeur thermique pour la chaleur de chauffage(3) traversé par un fluide caloporteur pour la restitution directe ou indirecte de chaleur au milieu de cuisson de l'appareil de cuisson,
       caractérisé par un compresseur (10) destiné à augmenter la température du fluide caloporteur par compression et disposé en amont de l'échangeur thermique pour la chaleur de chauffage (3), par un circuit fermé pour le fluide caloporteur, un dispositif de détente (12) pour détendre le fluide caloporteur comprimé étant prévu en aval de l'échangeur thermique pour la chaleur de chauffage (3) et en amont du compresseur (10) et un système de préchauffage du fluide caloporteur (16, 18) étant prévu en amont du compresseur (10).
  2. Appareil de cuisson selon la revendication 1,
       caractérisé en ce que le système de préchauffage présente un ou plusieurs échangeur(s) thermique(s) pour la chaleur du procédé (16), qui ramènent au fluide caloporteur au moins une partie des chaleurs perdues par l'appareil de cuisson.
  3. Appareil de cuisson selon la revendication 2,
    caractérisé par
    un échangeur thermique pour la chaleur du procédé (16), situé en amont du compresseur (10) qui est traversé par le fluide caloporteur et qui permet un échange thermique entre le fluide caloporteur et un milieu de cuisson qui sort du compartiment de cuisson (1).
  4. Appareil de cuisson selon l'une quelconque des revendications 2 ou 3, caractérisé en ce que
    le système de préchauffage présente un échangeur thermique pour la chaleur du procédé (18) pour réchauffer le fluide caloporteur par l'air ambiant.
  5. Appareil de cuisson selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le système de préchauffage présente un échangeur thermique à contre-courant, dans lequel un échange thermique a lieu entre le fluide caloporteur comprimé qui s'écoule de l'échangeur thermique pour la chaleur de chauffage (3) et le fluide caloporteur qui s'écoule vers le compresseur (10).
  6. Appareil de cuisson selon l'une quelconque des revendications 1 à 5, caractérisé par
    un système destiné à ramener du fluide caloporteur frais (18), situé en amont du compresseur (10).
  7. Appareil de cuisson selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le système de préchauffage présente un système (14) pour ramener le fluide caloporteur vers différents échangeurs thermiques et/ou des systèmes de chauffage.
  8. Appareil de cuisson selon l'une quelconque des revendications 1 à 7, caractérisé par
    un accumulateur de pression pour un fluide caloporteur comprimé, situé en aval du compresseur (10) et en amont de l'échangeur thermique pour la chaleur de chauffage (3).
EP98120408A 1997-12-23 1998-10-28 Appareil de cuisson avec recirculation de chaleur Expired - Lifetime EP0926447B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19757415A DE19757415C1 (de) 1997-12-23 1997-12-23 Gargerät mit Wärmerückführung
DE19757415 1997-12-23

Publications (2)

Publication Number Publication Date
EP0926447A1 EP0926447A1 (fr) 1999-06-30
EP0926447B1 true EP0926447B1 (fr) 2002-07-17

Family

ID=7853101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120408A Expired - Lifetime EP0926447B1 (fr) 1997-12-23 1998-10-28 Appareil de cuisson avec recirculation de chaleur

Country Status (3)

Country Link
EP (1) EP0926447B1 (fr)
AT (1) ATE220784T1 (fr)
DE (2) DE19757415C1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2221545A1 (fr) * 2010-01-08 2010-08-25 V-Zug AG Four de cuisson doté d'un accumulateur thermique latent
CN107388310B (zh) * 2017-07-19 2019-03-26 佛山市众拓科技有限公司 一种以热泵为能源的供热吸热制冷除油烟的整体厨房系统
CN111802906B (zh) * 2020-06-30 2021-05-18 宁波方太厨具有限公司 一种可调整蒸汽流向的加热设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1500266A (fr) * 1966-09-16 1967-11-03 Dispositif de chauffage de sécurité
US3988905A (en) * 1975-09-24 1976-11-02 Will Clarke England Reversible mechanical-thermal energy cell
US4539816A (en) * 1981-04-03 1985-09-10 Minnesota Mining And Manufacturing Company Heat and liquid recovery using open cycle heat pump system
IT1220754B (it) * 1988-06-01 1990-06-21 Zanussi Grandi Impianti Spa Forno di cottura a gas a convezione forzata
ATE213532T1 (de) * 1997-01-30 2002-03-15 Rational Ag Wärmetauschereinrichtung

Also Published As

Publication number Publication date
DE59804790D1 (de) 2002-08-22
DE19757415C1 (de) 1999-04-08
EP0926447A1 (fr) 1999-06-30
ATE220784T1 (de) 2002-08-15

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