Cooking device, in particular pressure cooker
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Solution Overview
Problem
Existing pressure cookers face issues with lid deformation under high pressure due to a stiffened construction, requiring a massive drive and significant space, which complicates force transmission and design.
Innovation Solution
A cooking appliance with a pivotally mounted pan and lid, utilizing a linear drive in a connecting frame section with pivot shafts around the lid pivot axis, allowing for a lighter, flatter lid design and efficient torque transmission, using a pivot lever and sleeve with partial external toothing for power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lid is stiffened to prevent deformation under high pressure, then the lid's strength and reliability are improved, but the lid's weight increases and more space is required for the drive mechanism
Solution Approach 1:
The patent relocates the lid pivot axis from the lateral frame sections to the rear connecting frame section, changing the spatial dimension of force application. This dimensional shift allows the drive mechanism to apply force closer to the lid's center of gravity, improving torque efficiency and allowing for a lighter lid design while maintaining reliable closure under pressure.
Solution Approach 2:
The patent changes the geometric parameters of the lid by making it lighter and flatter, while compensating for the reduced stiffness through optimized pivot axis positioning and drive mechanism design. This parameter change allows the lid to maintain sufficient structural integrity without requiring excessive weight or thickness.
2Reliability
If the lid is stiffened to prevent deformation under high pressure, then the lid's reliability is improved, but the drive mechanism and force transmission require a massive design occupying significant space
Solution Approach 1:
The patent relocates the drive mechanism from the lateral frame sections to the rear connecting frame section, utilizing previously underutilized space. This spatial reorganization allows for a more compact overall design while maintaining the necessary force transmission capability for reliable lid closure.
Solution Approach 2:
The patent extracts the drive mechanism from the bulky lateral frame sections and places it in the more compact rear connecting frame section. This separation allows the drive mechanism to be designed more efficiently, reducing its volume while maintaining the force necessary for reliable lid closure under pressure.
3Device complexity
If the lid is mounted in the lateral frame sections, then the structure is simplified, but the force introduction is unfavorable and the lid deforms under high pressure
Solution Approach 1:
The patent changes the mounting location from the lateral frame sections to the rear connecting frame section. This dimensional relocation optimizes the force introduction geometry, allowing the drive mechanism to apply force more effectively close to the lid's center of gravity, thereby preventing lid deformation under high pressure while maintaining structural simplicity.
4Force
If a massive drive mechanism is used to pivot the lid, then the force transmission is sufficient, but the space required increases significantly
Solution Approach 1:
The patent relocates the drive mechanism to the rear connecting frame section, which allows for more efficient torque transmission geometry. By positioning the drive closer to the lid's pivot axis and center of gravity, the mechanism can transmit sufficient force with a more compact design, reducing the volume required while maintaining adequate torque for lid operation under pressure.
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
Reduces the risk of lid deformation, enables a more efficient and space-saving design with reduced weight and material usage, and allows for flexible design options through modular components.
Implementation Method 1
a linear drive which is capable and configured to pivot a pivot lever mounted about a pivot axis
Implementation Method 2
a pivot lever and sleeve with partial external toothing for power transmission
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a cooking appliance (1), in particular a pressure cooker, with a pot (3) having a rectangular cooking chamber (25) which can be closed by a pivotable lid (5), wherein the pot (3) is pivotably mounted in a cooking appliance frame (7) by means of a pot pivot axis (4) and the lid (5) is pivotable about a lid pivot axis (6) by means of a drive (41), wherein the cooking appliance frame (7) has two lateral frame sections (9, 11) and a connecting frame section (13) arranged at the rear of the pot (3) connecting the two lateral frame sections (9, 11). It is characterized by the fact that two pivot shaft sections (15, 17) are arranged around the lid pivot axis (6), which are rotatably (18, 19) arranged on the connecting frame section (13), and that the drive (41) for pivoting the lid (5) is arranged in the connecting frame section (13).