Cooking appliance for a large-scale kitchen with a fat extraction device, and method for operating such a cooking appliance with fat extraction
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Solution Overview
Problem
Existing cooking appliances in commercial kitchens contaminate recovered fat with cleaning residues due to shared drainage systems, making the fat unsuitable for further processing and reducing the service life of components.
Innovation Solution
A cooking appliance with a fat collection device that includes a grease collection container positioned between the cooking chamber drain and siphon, utilizing a cleaning device to flush out cleaning residues before fat extraction, and a bidirectional suction pump to prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared drainage system is used for both cooking residue removal and cleaning agent disposal, then the device complexity is reduced, but the recovered fat becomes contaminated with cleaning residues making it unsuitable for further processing
Solution Approach 1:
The drainage system is segmented into separate functional zones: a first drainage line for cooking residues and a second drainage line for cleaning agents. The fat collection container is positioned to receive fat primarily from the cooking residue drainage path, while the cleaning agent drainage path is routed separately through or around the container without direct mixing, thus separating contamination sources while maintaining system manageability.
Solution Approach 2:
The fat collection container serves as an intermediary element that selectively receives fat from cooking residues while being designed to minimize or prevent direct contact with cleaning agent drainage. The container's positioning and the drainage line configuration act as intermediaries that allow fat collection functionality while blocking the transmission of cleaning residues to the collected fat.
2Reliability
If cleaning is performed frequently to maintain hygiene, then hygiene standards are improved, but cleaning residues contaminate the recovered fat
Solution Approach 1:
The harmful cleaning residues are extracted from the fat collection process by providing a separate drainage path for cleaning agents. This allows cleaning to be performed frequently for hygiene maintenance while the cleaning residues are directed away from the fat collection container, preventing contamination and maintaining fat purity for further processing.
3Productivity
If the siphon device is positioned close to the cooking chamber drain, then the drainage efficiency is improved, but cleaning residues have less distance to travel and more easily contaminate the fat collection area
Solution Approach 1:
Different sections of the drainage system are assigned different functions: the first drainage line near the cooking chamber is optimized for cooking residue removal with efficient drainage geometry, while the second drainage line for cleaning agents is configured to route cleaning residues away from the fat collection container. The fat collection container is positioned to receive fat from the cooking residue path while being protected from cleaning agent contamination through the separate drainage configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively separates cleaning residues from recovered fat, improving its quality for further processing and extending the lifespan of appliance components while maintaining cooking quality.
Implementation Method 1
a cleaning device is provided which is configured to convey water at least via the grease extraction line and the grease collection container into the cooking chamber drain in the direction of the siphon device
Implementation Method 2
the extraction pump is configured to convey the grease-water mixture drawn in via the grease extraction line to the grease discharge line
Implementation Method 3
a siphon device containing a water reservoir that serves to prevent odors or vapors from the wastewater system from entering the cooking chamber. The water reservoir also serves to cool the hot steam.
Implementation Method 4
the hot steam from the cooking chamber is fed into a siphon with steam condensation. This condenses the steam and cools it along with the fat-water mixture in the steam.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The present invention relates to a cooking appliance for a large-scale kitchen in the form of a combi-steamer (1, 1'), having a cooking compartment (3) for cooking food which is to be cooked, which can be arranged on a plurality of cooking levels (32), or a rotisserie appliance, having a cooking compartment for cooking food which is to be cooked, which can be arranged on a rotatable carrier, having a heating device for heating the cooking compartment atmosphere, an appliance controller for controlling the cooking appliance, and a cooking compartment drain (33) which is located below a floor (4) of the cooking compartment (3) and serves for conducting away a fat/water mixture and gaseous portions of the cooking compartment atmosphere out of the cooking compartment (3), wherein the cooking compartment drain (33) extends from an outlet opening (15) in the floor (4) or in the floor region of the cooking compartment (3) as far as a siphon device (35), wherein a fat-collecting device (59) is provided which comprises at least one fat-collecting container (61), at least one fat extraction line (73), at least one extraction pump (77) and at least one fat discharge line (82), wherein the fat extraction line (53) extends from the fat-collecting container (61) to the extraction pump (77), wherein the extraction pump (77) is configured to further convey the fat/water mixture sucked up via the fat extraction line (73) into the fat discharge line (82), and wherein a cleaning device is provided which is configured to convey water at least via the fat extraction line (73) and the fat-collecting container (61) into the cooking compartment drain (33) in the direction of the siphon device (35).