Controller, air conditioner outdoor unit, and air conditioner
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Solution Overview
Problem
The existing air conditioner outdoor units with dual external fans have large circuit boards, leading to higher costs, and the power modules for fans can affect the compressor's power module current, impacting compressor operation.
Innovation Solution
A controller with a compact circuit board design, featuring separate current circuits for fan and compressor power modules, shared components between some circuits, and a heat sink for heat dissipation, reducing board size and costs while isolating fan power modules from compressor current interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate current circuits are provided for fan power modules and compressor power module, then the fan power modules do not affect the compressor current, but the circuit board size and component count increase
Solution Approach 1:
The circuit board is segmented into distinct current circuits: a first current circuit for the first fan power module, a second current circuit for the second fan power module, and a third current circuit for the compressor power module. This segmentation isolates the compressor current from fan power module interference, ensuring stable compressor operation while maintaining manageable circuit complexity through organized separation of functions.
2Ease of manufacture
If the circuit board size is reduced to lower production costs, then manufacturing cost decreases, but it becomes difficult to provide separate current circuits for each power module
Solution Approach 1:
The first current circuit and second current circuit share common circuit components, merging redundant elements between the two fan power module circuits. This merging reduces the total component count and circuit board area requirements, lowering production costs while the third current circuit for the compressor remains separate to maintain operational independence and stability.
3Device complexity
If shared circuit components are used between fan power modules, then the number of components and circuit board size are reduced, but the fan power modules may interfere with each other's current
Solution Approach 1:
While the first and second current circuits share some components to reduce complexity, each fan power module operates within its own dedicated current circuit pathway. The third current circuit for the compressor is fully separate. This segmentation strategy allows component sharing between fans without causing interference, as each module has isolated current paths that prevent mutual interference while maintaining overall system reliability.
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
The compact design reduces production costs and stabilizes compressor operation, enhancing the air conditioner's cost-performance by minimizing circuit component count and optimizing heat management.
Implementation Method 1
a heat sink for heat dissipation
Data Source
AI summary
A controller includes a circuit board, and a module assembly arranged at the circuit board. The module assembly includes a first power module, a second power module, and a third power module. The circuit board includes a first current circuit connected to the first power module, a second current circuit connected to the second power module, and a third current circuit connected to the third power module. The first current circuit and the second current circuit share one or more circuit components.