Microwave Pressure Cooker Interior Wall Heating System
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Solution Overview
Problem
Existing microwave steam pressure cooking devices suffer from condensation issues where water vapor condenses on cold interior linings, causing drips on food and making it difficult to open the cooking chamber due to negative pressure after cooking.
Innovation Solution
A device with a heating system that preheats the interior walls to prevent condensation, featuring drainage grooves and a pressure compensation element to manage pressure and condensate, ensuring condensate does not fall on the food and allowing easy door opening post-cooking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If microwave steam pressure cooking is performed in a closed chamber, then cooking speed and temperature are improved, but condensation forms on cold interior walls causing drips on food
Solution Approach 1:
The interior walls of the cooking chamber are preheated before the cooking process begins. This preliminary heating action ensures that when steam is generated during cooking, the walls are already at a temperature that prevents condensation, thereby eliminating the harmful effect of condensate dripping on food while maintaining the benefits of pressurized steam cooking
Solution Approach 2:
The temperature parameter of the interior walls is changed from cold to heated state before cooking. By raising the wall temperature above the dew point, the physical condition for condensation is eliminated, allowing the system to maintain high temperature and pressure for efficient cooking without the harmful side effect of condensate formation
2Reliability
If pressure relief valve is used to release excess pressure, then cooking safety is improved, but negative pressure develops making door opening difficult
Solution Approach 1:
A pressure equalization element is introduced as an intermediary mechanism between the cooking chamber and the external environment. This element includes a valve that can be opened to allow air to enter the chamber, equalizing the pressure difference and enabling easy door opening while the pressure relief valve continues to provide safety function
Solution Approach 2:
The pressure equalization function is extracted as a separate, distinct mechanism from the pressure relief valve. The pressure equalization element with its dedicated valve handles the door opening assistance function, while the pressure relief valve maintains its safety function, allowing both functions to operate independently and effectively
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
Prevents condensate from forming on food, maintains pressure balance, and facilitates easy door opening by directing condensate away from the food and into a drainage system, enhancing cooking efficiency and user experience.
Implementation Method 1
a heating device (8) which is designed to partially or completely heat the interior walls (7) surrounding the cooking chamber (5)
Implementation Method 2
a device for generating microwaves (4), in particular one or more magnetrons
Implementation Method 3
a pressure equalization element (10) which is designed to equalize pressure between the cooking chamber (5) and the environment external to the cooking chamber
Data Source
Figure 1~3
AI summary
The invention relates to a device for pressure cooking food arranged on or in a cooking carrier by means of microwave radiation, wherein the device has a device for generating microwaves and a cooking chamber which is surrounded by at least one pressure-tight door for inserting or removing the food to be cooked and by interior walls, and wherein a heating device is provided to partially or completely heat the interior walls surrounding the cooking chamber.