Reverse-Mounted Photovoltaic Inverter Layout for Cooling and Assembly
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Solution Overview
Problem
Current photovoltaic inverters have complex installation processes, are prone to cable connection faults, and suffer from poor cooling and large size, which affects their stability and efficiency.
Innovation Solution
The photovoltaic inverter design includes a reversely fastened circuit board with distinct subcavities for devices, thermally conductive connections for heat dissipation, and rigid fastening of the switch assembly to improve stability and reduce installation complexity, while minimizing size and enhancing cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional cable connection methods are used in photovoltaic inverters, then electrical connections can be established, but the installation process becomes complex and cable connection faults are easily generated
Solution Approach 1:
The patent extracts and eliminates cables from the inverter system by implementing direct soldering connections between circuit board terminals and component leads. This removes the cable connection环节 that causes installation complexity and connection faults, achieving reliable electrical connections without cables.
Solution Approach 2:
The patent replaces the mechanical cable connection system with direct soldering joints. Instead of using mechanical connectors and cables, electrical connections are established through soldering, which eliminates connection faults and simplifies the installation process.
2Reliability
If traditional inverter design is used, then the inverter can function, but it has a large size and poor cooling effect
Solution Approach 1:
The patent merges the circuit board with the heat dissipation structure by integrating cooling fins directly into the circuit board design. This combination allows the circuit board to serve both electrical and thermal management functions, improving cooling efficiency while reducing overall inverter size.
Solution Approach 2:
The patent extends heat dissipation into the vertical dimension by adding cooling fins that protrude from the circuit board surface. This three-dimensional heat dissipation structure increases the heat exchange area without significantly increasing the horizontal footprint, thereby improving cooling while maintaining compact size.
3Stability of the object's composition
If circuit board is traditionally fastened in photovoltaic inverter, then assembly can be completed, but assembly difficulty is high and structure stability is poor
Solution Approach 1:
The patent combines the fastening function with the housing structure by integrating mounting protrusions and recesses directly into the housing and circuit board. This integration eliminates the need for separate fastening components and procedures, simplifying assembly while ensuring stable structural connection.
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 reduces cable connections, improves cooling efficiency, stabilizes the structure, and simplifies installation, leading to enhanced performance and reduced size of the photovoltaic inverter.
Implementation Method 1
The inverter power assembly is in thermally conductive connection to a part of the cooling fins through the thermally conductive contact part
Data Source
Figure 1
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AI summary
This application provides a photovoltaic inverter and a photovoltaic system. The photovoltaic inverter includes a housing, a circuit board, cooling fins, a switch assembly, and PV ports. The circuit board is reversely fastened in the photovoltaic inverter. The circuit board partitions an accommodating cavity into a first subcavity and a second subcavity, and the first subcavity and the second subcavity accommodate a first device and a second device respectively. The second device includes an inverter power assembly fastened to a rear circuit board side. The cooling fins are located on a side that is of a bottom plate and that is away from a cover plate. The inverter power assembly is in thermally conductive connection to the cooling fins through a thermally conductive contact part. The switch assembly includes a knob, a connecting rod, and a switch body. The switch body includes breaking units. Pins of the breaking units are rigidly fastened to the rear circuit board side. In this application, the circuit board is reversely fastened in the photovoltaic inverter, and a large device is fastened to the rear circuit board side, so that both cooling effect and a product aesthetic feeling are considered. The switch body is rigidly fastened to the rear circuit board side through the pins. This reduces assembly difficulty of the photovoltaic inverter.