Cold Storage Sliding Door Airflow Warming to Suppress Dew Condensation
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Solution Overview
Problem
Dew condensation on sliding doors of cold storages increases with lower temperatures, posing a risk of moisture accumulation and potential damage, especially in modern cold storages designed for even lower temperatures.
Innovation Solution
A cold storage system with a compressor, fan, heater, and control apparatus that operates the heater when specific temperature conditions are met to warm the sliding door and suppress dew condensation, using airflow from the compressor and condenser to maintain optimal temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cold storage chamber temperature is lowered to store pharmaceuticals, then the storage capability is improved, but dew condensation on the sliding door increases
Solution Approach 1:
A third air outlet is introduced as an intermediary element between the cold storage chamber and the sliding door. This air outlet delivers warm air from the machine chamber to the sliding door area, acting as a thermal buffer that prevents direct contact between cold chamber air and the door surface, thereby eliminating dew condensation while maintaining low storage temperature
Solution Approach 2:
The system changes the temperature parameter of air delivered to the sliding door area by introducing a separate air outlet that supplies warm air from the machine chamber. This creates a localized temperature gradient that keeps the sliding door surface temperature above the dew point, preventing condensation while the main chamber remains cold
2Temperature
If the cold storage chamber is cooled to even lower temperatures in recent years, then the storage capability is improved, but the amount of dew condensation on the sliding door increases
Solution Approach 1:
The third air outlet serves as a thermal intermediary that introduces warm air from the machine chamber to the sliding door region. This mediator prevents the direct thermal interaction between the ultra-cold chamber air and the door surface, maintaining the door temperature above the dew point even when the chamber is cooled to very low temperatures, thus preventing dew condensation formation
3Object-affected harmful factors
If a heater is operated to warm the sliding door, then dew condensation is suppressed, but energy consumption increases
Solution Approach 1:
The system utilizes the compressor and condenser, which are already operating as part of the refrigeration cycle, to generate warm air that is then directed to the sliding door through the third air outlet. This self-service approach repurposes existing components and waste heat to solve the condensation problem, eliminating the need for a dedicated heater and reducing energy consumption
Solution Approach 2:
The warm air generated by the compressor and condenser, which would otherwise be wasted heat, is converted into a useful resource by directing it to the sliding door through the third air outlet. This transforms a potentially harmful waste product into a beneficial thermal source that prevents dew condensation, improving overall system efficiency
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
Effectively suppresses dew condensation on sliding doors by maintaining airflow warmth, reducing moisture accumulation and ensuring consistent temperature control.
Implementation Method 1
a fan that generates an airflow passing around the compressor and blown to the sliding door through an air outlet opened to the machine chamber
Implementation Method 2
a heater disposed in the cold storage chamber; and a control apparatus that operates the heater when a condition of a set temperature for the cold storage chamber being equal to or lower than a specified temperature and a condition of the compressor being in an operating state are satisfied
Implementation Method 3
a compressor disposed in the machine chamber and constituting a refrigeration circuit that cools an inside of the cold storage chamber
Data Source
AI summary
A cold storage includes a box including a cold storage chamber, a sliding door that opens and closes the cold storage chamber, and a machine chamber; a compressor disposed in the machine chamber and constituting a refrigeration circuit that cools the inside of the cold storage chamber; a fan that generates an airflow passing around the compressor and blown to the sliding door through an air outlet opened to the machine chamber; a heater disposed in the cold storage chamber; and a control apparatus that operates the heater when a condition of a set temperature for the cold storage chamber being equal to or lower than a specified temperature and a condition of the compressor being in an operating state are satisfied.