Heated Vent Port Bracket Layout for Ice-Free Refrigerated Cabinets
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Solution Overview
Problem
Vent ports in refrigerated cabinets face issues with premature failure and high costs due to silicone rubber heaters, which lead to inefficient heat distribution and increased electricity usage, causing ice formation and operational issues.
Innovation Solution
A vent port design utilizing a metal bracket with a low-wattage resistor for heating, integrated into the structure to prevent ice formation, featuring a resilient flap for air control and efficient heat application, allowing for compact and economical construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If silicone rubber pads are used for heating, then valves are heated to prevent ice, but the pads are custom made and relatively expensive
Solution Approach 1:
The heating wire is a inexpensive, off-the-shelf component that can be easily wrapped around the vent port, eliminating the need for custom-made silicone rubber pads. This dramatically reduces manufacturing cost while maintaining the ice prevention function.
Solution Approach 2:
The heating function is segmented from the valve structure itself - the heating wire is a separate, independent component that can be easily installed and replaced, rather than being integrated into a custom-made silicone pad assembly.
2Object-affected harmful factors
If silicone rubber pads are used for heating, then valves are heated, but the limited shape possibilities prevent optimal heat placement resulting in heat waste and higher wattage usage
Solution Approach 1:
The heating wire is wrapped directly around the vent port at the precise location where heat is needed to prevent ice formation. This localized heating approach ensures optimal heat placement, eliminating the heat waste associated with silicone pads that cannot be positioned optimally due to shape constraints.
Solution Approach 2:
The heating wire can be dynamically adjusted and repositioned around the vent port to optimize heat distribution, whereas silicone pads have fixed shapes that cannot be adapted to the optimal heating location.
3Object-affected harmful factors
If silicone rubber pads with high wattage are used to compensate for heat waste, then ice formation is prevented, but electricity is wasted
Solution Approach 1:
The heating wire delivers heat precisely where needed at the vent port, eliminating the need for high wattage compensation. This localized heating reduces energy loss while effectively preventing ice formation.
Solution Approach 2:
The patent converts the potential harm of insufficient heating into a benefit by using a simple wire configuration that maximizes heat efficiency. The wire's close proximity to the vent port ensures that even low wattage delivers effective heat where needed, turning a potential weakness into an energy-saving advantage.
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 prevents ice formation, reduces operational costs by using low-wattage heating, and ensures efficient operation with precise heat application, enhancing the reliability and efficiency of the vent port.
Implementation Method 1
a resistor mounted on the bracket for generating and delivering heat into the bracket sufficient to melt ice thereon
Implementation Method 2
The flap is disposed on the bracket for movement under gravity from the open position to the closed position
Data Source
AI summary
The vent port employs a pair of mated housing parts that define a space for two flap valves. Each flap valve is formed of an aluminum bracket with an aperture for the passage of air and a silicone flap that closes over the aperture. The flap valves are oriented so that gravity enhances the closing of the flaps. Resistors are mounted on the brackets to heat the brackets at a low wattage. In one embodiment, the flap valves are vertically arranged over each other. In another embodiment, the flap valves are horizontally disposed in criss-crossing relation.