Refrigerator Condensation Fan Layout for Compact Low-Noise Cooling
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Solution Overview
Problem
Existing refrigerators face inefficiencies in cooling multiple storage compartments simultaneously, leading to temperature imbalances and reduced operation efficiency, and also struggle with reducing the volume of the machine room while maintaining heat-exchange efficiency and minimizing noise.
Innovation Solution
The design includes a fan assembly with multiple condensation fans spaced a preset distance from the drain pan, a control unit for synchronized operation and rotation number adjustment, and a method for controlling the evaporators based on refrigerant flow and temperature sensors to ensure balanced cooling across compartments, while optimizing the machine room's size and noise levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the condensing fan decreases in size to reduce the height of the machine room, then the volume of the machine room is reduced, but it becomes difficult to generate sufficient air flow, deteriorating heat-exchange efficiency of the condenser
Solution Approach 1:
The condensing fan is divided into multiple fan assemblies, each with multiple fan blades arranged in different directions. This segmentation allows each fan assembly to be compact while the collective arrangement generates sufficient air flow through coordinated multi-directional blade configuration, resolving the contradiction between reduced fan size and maintained heat-exchange efficiency.
Solution Approach 2:
The fan blades are arranged in different spatial directions within the fan assembly, utilizing three-dimensional spatial configuration to maximize air flow generation within a compact volume. This dimensional arrangement enables sufficient cooling performance without increasing the overall height of the machine room.
2Productivity
If the condensing fan increases in rotation number to generate sufficient air flow, then heat-exchange efficiency is maintained, but the inner pressure of the machine room abnormally increases causing an increase of noises
Solution Approach 1:
The control unit dynamically adjusts the rotation speed of the condensing fan based on real-time detection of machine room internal pressure and temperature conditions. This dynamic control allows the system to maintain adequate heat-exchange efficiency while preventing excessive pressure buildup that causes noise, by optimizing fan rotation speed rather than operating at maximum speed continuously.
Solution Approach 2:
The system incorporates sensors to detect machine room internal pressure and temperature, with the control unit using this feedback information to adjust fan rotation speed accordingly. This closed-loop feedback mechanism ensures heat-exchange efficiency is maintained while preventing noise-generating pressure increases.
3Adaptability or versatility
If independent cooling is performed in multiple storage compartments through separate evaporators, then each compartment can be cooled individually, but the storage compartment not being cooled may increase in temperature beyond normal range and cool air is not supplied at suitable time
Solution Approach 1:
The control unit provides universal control capability that can manage multiple evaporators and storage compartments simultaneously or selectively. This multi-functional control system ensures that while independent cooling is available, the system can also coordinate cooling across compartments to maintain temperature reliability and supply cool air at appropriate times based on overall system conditions.
Solution Approach 2:
The control unit monitors temperature conditions across all storage compartments and proactively activates cooling in compartments that are not currently being cooled, before temperatures rise beyond the normal range. This preliminary action prevents temperature violations while maintaining the flexibility of independent cooling control.
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 enhances heat-exchange efficiency, reduces noise, and maintains efficient cooling of multiple compartments, allowing for a smaller machine room while preventing refrigerant concentration imbalances and minimizing power consumption.
Implementation Method 1
a condenser condensing a refrigerant compressed in the compressor
Implementation Method 2
The air flowing by the condensing fan may perform heat exchange (cooling) in the condenser
Implementation Method 3
Cool air stored in the refrigerating compartment may be cooled while passing through the first evaporator
Implementation Method 4
the refrigerant may be selectively supplied into the first or second evaporator to cool one storage compartment
Data Source
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AI summary
Provided are a refrigerator and a control method thereof. The refrigerator includes a machine room defined in one side of a storage compartment, a base defining a bottom surface of the machine room, a compressor seated on the base to compress a refrigerant, a condenser condensing a refrigerant compressed in the compressor, the condenser being disposed on one side of the compressor, a drain pan disposed on the base to store condensed water generated in the condenser, and a fan assembly coupled to the base to generate an air flow within the machine room. The fan assembly includes a plurality of condensation fans.