Outdoor Unit Control Box Cooling Using Heat Exchange Chamber Air Flow
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Solution Overview
Problem
In split-type air conditioners, the outdoor unit's control box generates excessive heat, which can damage electronic components due to inadequate heat dissipation, despite existing cooling solutions like heatsinks and air suction holes.
Innovation Solution
The outdoor unit incorporates a barrier that partitions the space into a heat exchange chamber and a machine room, with defined inflow and discharge passages for air flow, allowing air to naturally cool the control box using the heat exchange chamber's air flow, and a heatsink exposed through the barrier to enhance heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heatsink and cooling guide are added to cool the control box, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The patent combines the heat dissipation function with the existing barrier structure by integrating the heatsink into the barrier that already separates the heat exchange chamber and machine room. The barrier serves dual purposes: spatial separation and heat dissipation assistance, eliminating the need for separate cooling structures.
Solution Approach 2:
The barrier structure is given multiple functions: it acts as both a spatial separator between chambers and a heat dissipation component. The heatsink integrated into the barrier utilizes the air flow already present in the system, making the barrier a multi-functional element that reduces overall device complexity.
2Temperature
If air suction holes and convection guide plates are added to force air flow through the control box, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The patent merges the air flow guidance function with the barrier structure. The barrier's positioning and design naturally guide the air flow from the heat exchange chamber through the control box, eliminating the need for separate convection guide plates and air suction holes.
Solution Approach 2:
The system uses its own operational air flow (generated by the blower fan for heat exchange) to simultaneously cool the control box. The barrier structure leverages this existing air flow without requiring additional power-consuming fans or complex air management systems.
3Temperature
If a separate cooling system is added to the control box, then heat dissipation is improved, but installation space requirements increase
Solution Approach 1:
The heat dissipation components (heatsink, air flow paths) are integrated into the existing barrier and chamber structures, eliminating the need for separate cooling subsystems that would occupy additional space. The cooling function is embedded within the existing spatial arrangement.
Solution Approach 2:
The barrier structure serves multiple functions including spatial separation, structural support, and heat dissipation assistance. This multi-functionality reduces the need for additional dedicated cooling components that would increase installation space requirements.
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 configuration effectively reduces the temperature of the control box's PCBs by utilizing the air flow generated by the blower fan, preventing component damage and optimizing installation space without additional power consumption.
Implementation Method 1
a heatsink exposed through the barrier to enhance heat dissipation
Implementation Method 2
air flow generated by the blower fan
Data Source
AI summary
In an outdoor unit of an air conditioner, a control box of the outdoor unit of the air conditioner is configured so that heat exchange chamber-side air flows toward a fan motor assembly via an inside of the control box by operation of the fan motor assembly. Thus, the inside of the control box may be efficiently cooled.