Photovoltaic Inverter Ventilation Layout for Power Unit Cooling
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Solution Overview
Problem
Conventional photovoltaic inverters have inefficient heat dissipation due to a complex layout that places heat-sensitive modules near air outlets and high-temperature-resistant modules near air inlets, resulting in low heat dissipation efficiency for the inverter power unit.
Innovation Solution
The photovoltaic inverter design includes separate ventilating passages for the inverter power unit and other components, with the inverter power unit positioned upstream to receive cold air directly, improving cooling efficiency and reducing the failure rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional layout is used to ensure protection level, then the inverter structure is compact, but the heat dissipation efficiency of the inverter power unit deteriorates
Solution Approach 1:
The patent divides the internal space into separate ventilating passages: a first ventilating passage for the inverter power unit and a second ventilating passage for other components. This segmentation allows independent heat dissipation paths, enabling the inverter power unit to receive dedicated cold air supply without being affected by other heat-generating components, thus resolving the contradiction between compact structure and heat dissipation efficiency.
Solution Approach 2:
The patent introduces a baffle as an intermediary element to separate the first and second ventilating passages. The baffle directs airflow and prevents hot air from the second passage from mixing with cold air intended for the inverter power unit, maintaining effective temperature differential and heat dissipation performance while preserving structural compactness.
2Device complexity
If heat-sensitive modules are placed near air outlets and high-temperature-resistant modules near air inlets, then the layout is simplified, but the heat dissipation efficiency of the inverter power unit deteriorates
Solution Approach 1:
The patent segments the ventilating system into independent passages based on the heat dissipation requirements of different components. The inverter power unit, being heat-sensitive, is placed in the first ventilating passage with dedicated air inlet and outlet, while other components occupy the second ventilating passage. This segmentation eliminates the need for complex selective placement of individual modules and achieves efficient heat dissipation through systematic zoning.
Solution Approach 2:
The patent applies local quality by providing different ventilating conditions to different components according to their specific heat dissipation needs. The inverter power unit receives high-priority cooling with a dedicated passage and higher wind pressure from the first fan, while other components share the second ventilating passage. This localized optimization resolves the contradiction between layout simplicity and heat dissipation efficiency.
3Device complexity
If a single ventilating passage is used for all components, then the device structure is simplified, but the heat dissipation efficiency of the inverter power unit deteriorates
Solution Approach 1:
The patent divides the single ventilating passage into multiple independent passages (first and second ventilating passages) with separate air inlets, outlets, and flow paths. This segmentation enables the inverter power unit to have dedicated cooling airflow that is not contaminated by heat from other components, achieving efficient heat dissipation while maintaining relatively simple overall structure through modular design.
Solution Approach 2:
The baffle acts as an intermediary that physically separates the two ventilating passages, preventing airflow mixing between hot and cold zones. This simple intermediary element enables independent heat dissipation paths without requiring complex multi-layer structures or multiple external housings, resolving the contradiction between structural simplicity and heat dissipation performance.
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 design enhances heat dissipation efficiency for the inverter power unit, reduces failure rates, and allows for a more compact and cost-effective structure by optimizing airflow and component placement.
Implementation Method 1
a first fan is arranged in the first air inlet
Implementation Method 2
a second fan s arranged in the second air inlet
Implementation Method 3
The inverter power unit is arranged upstream of the first ventilating passage in a direction in which air is inputted
Implementation Method 4
air flows from a lower side of the photovoltaic inverter to an upper side of the photovoltaic inverter
Data Source
AI summary
A photovoltaic inverter is provided. The photovoltaic inverter includes a cabinet and a power module arranged in the cabinet. The power module includes an inverter power unit, a first ventilating passage and a second ventilating passage isolated from the first ventilating passage. The inverter power unit is arranged upstream of the first ventilating passage in a direction in which air is inputted. The first ventilating passage is provided with a first air inlet and a first air outlet. The second ventilating passage is provided with a second air inlet and a second air outlet. In the photovoltaic inverter according to the present disclosure, the inverter power unit that heats up severely is provided with an independent ventilating passage for heat dissipation. In addition, the inverter power unit is arranged the upstream of the first ventilating passage in the direction in which air flows.