Refrigerating Chamber Door Frame Heating for Frost-Free Flexible Sheets
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Solution Overview
Problem
Existing refrigerating chamber enclosures face issues with frost formation on flexible sheets exposed to cold, leading to uneven thickness and operational errors due to inadequate air distribution and heating solutions, particularly in quick-opening doors with motorized drums.
Innovation Solution
The enclosure incorporates vertical posts with fans, deflector plates, and electrical resistors to direct heated air along the flexible sheet's surface, ensuring frost prevention by arranging fans and resistors at different heights to uniformly distribute hot air and prevent ice or frost formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flexible sheet is exposed to cold temperatures to enable quick-opening door functionality, then the door can operate effectively in refrigerating chambers, but frost forms on the flexible sheet causing uneven thickness and operational errors
Solution Approach 1:
The heating system (electrical resistors and fans) activates before the flexible sheet is fully exposed to cold temperatures, pre-heating the sheet to prevent frost formation. This preliminary heating action ensures the flexible sheet remains frost-free during the door opening operation, maintaining both functionality and reliability
Solution Approach 2:
A heated air flow acts as an intermediary between the heating elements and the flexible sheet. The fans generate air flow that carries heat from the electrical resistors to the flexible sheet surface, creating a protective thermal barrier that prevents frost formation while allowing the sheet to remain exposed to cold temperatures
2Reliability
If air projection means are added to prevent frost on flexible sheets, then frost prevention improves, but the device complexity increases
Solution Approach 1:
The vertical posts serving the quick-opening door are given a dual function: they provide structural support for the door mechanism and house the heating system (electrical resistors and fans). This integration allows frost prevention functionality to be added without increasing overall device complexity, as the heating components utilize existing structural elements
Solution Approach 2:
The heating system components (electrical resistors, fans, and their mounting structures) are merged into the vertical posts of the door frame. This consolidation eliminates the need for separate frost prevention apparatus, reducing device complexity while maintaining effective frost prevention through the projected heated air flow
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
This solution effectively prevents frost formation on the flexible sheet, ensuring consistent operation and coordinated movement of the quick-opening door, even when exposed to cold temperatures, by ensuring hot air reaches the entire surface, reducing operational errors and maintaining door functionality.
Implementation Method 1
underneath said deflector plate electrical resistors for heating the supplied air
Implementation Method 2
an outlet for supplying hot air on one of the surfaces, inner or outer, of the flexible sheet exposed to the cold of the chamber and the removal of frost from said flexible sheet
Data Source
AI summary
The invention relates to an enclosure for refrigerating chambers, suitable for closing an access (3) to a refrigerating chamber and comprising: —a sliding refrigerating door (1), and —a quick-opening door (2), both assembled on the same side of the chamber, comprising a frame with vertical posts (4), comprising: —on an outer face, at least one mouth (42) wherein a fan (6) is coupled which introduces air in the corresponding vertical post (4); —on the inside thereof, a deflector plate (61) which directs the air towards electrical resistors (7) for heating the air, situated underneath the deflector plate and, —on an inner face, an outlet (43) for supplying hot air on one of the surfaces, inner or outer, of the flexible sheet (21) exposed to the cold of the chamber and removing frost from said flexible sheet (21).