Microwave Cooking Package Venting for Reliable Steam Release
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Solution Overview
Problem
Existing microwave oven cooking packages face issues with explosion, deformation, and reduced steaming effect due to improper sealing and steam release, leading to a mess and compromised food quality.
Innovation Solution
A package design featuring a synthetic resin container with concave parts on the flange that form a projection part for inward-directed steam release, preventing peeling and ensuring the lid opens automatically under pressure, maintaining the steaming effect and preventing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a projection part is formed at the heat-sealed part to enable automatic opening under pressure, then the package can prevent explosion, but the sealing tool may be displaced from the predetermined part, causing the projection part to be displaced and reducing steaming effect
Solution Approach 1:
The patent forms recesses in the flange part before heat-sealing to pre-position the projection part. This preliminary structural preparation ensures that during heat-sealing, the sealing tool cannot be displaced, and the projection part is automatically formed at the correct predetermined position, solving both the reliability of automatic opening and the precision of projection part placement
Solution Approach 2:
The recesses in the flange part act as an intermediary structure that guides and constrains the sealing tool during heat-sealing. This intermediary feature ensures the sealing tool maintains proper positioning, thereby ensuring the projection part forms at the correct location without displacement, resolving the contradiction between automatic opening reliability and manufacturing precision
2Reliability
If the lid adheres to the container body immediately after automatic opening, then steam is released, but it becomes difficult to take outside air into the container rapidly, causing large deformation
Solution Approach 1:
The patent segments the lid from the container body by designing the lid to be separable after heat-sealing. The lid can be easily removed from the container body after cooking, allowing outside air to enter rapidly and preventing large deformation, while still maintaining the steam release function through the projection part opening mechanism
Solution Approach 2:
The patent creates a dynamic system where the lid transitions from a sealed state during cooking to an easily removable state after cooking. The lid is designed to adhere during cooking for steam release but can be easily taken off afterward, allowing rapid air intake and preventing deformation through dynamic state change
3Ease of manufacture
If the heat-sealed part has a flat periphery, then manufacturing is simple, but contents adhere to the heat-sealed part making it difficult to remove, causing peeling and leaking
Solution Approach 1:
The patent replaces the flat periphery of the heat-sealed part with a curved surface. This curvature prevents contents from adhering to the heat-sealed part, making it easy to remove the lid after cooking while maintaining sealing integrity during cooking. The curved surface design is simple to manufacture and effectively prevents peeling and leaking
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 package effectively prevents explosion and deformation while ensuring the lid opens correctly, maintaining the steaming effect and improving food quality by ensuring precise steam release and maintaining internal pressure.
Implementation Method 1
a lid is heat-sealed to the flange part to seal the package hermetically
Implementation Method 2
inside pressure of the packages is increased by steam and the like generated from the food contained therein
Implementation Method 3
when the container is filled with contents such as rice, and heat-sealed to form the projection part that automatically opens, a sealing tool may be displaced
Data Source
AI summary
Provided is a package for cooking in a microwave oven, in which a synthetic resin container body having a flange part is filled with contents and a lid is heat-sealed to the flange part to seal the package hermetically. Independent concave parts sandwiching a heat-sealed part are provided in a part of the flange part on the inner and outer sides of the heat-sealed part to form, on the heat-sealed part, a projection part directed to the inner direction of the container and serving as a steam releasing part by automatically opening. The package is prevented from being broken or deformed by preventing the heat-sealed part from being peeled immediately after the contents are placed in the container body. When heating cooking is performed in a microwave oven, the package improves the taste of the contents by the steaming effect. The lid is sure to automatically open by the increase of the pressure in the container.