Electric Compressor Inverter Layout for Shorter Axial Assembly
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Solution Overview
Problem
Conventional inverter-device built-in type electric compressors have a long center axis length, complicating assembly and inspection, and often require both electrical and mechanical components to be assembled together, making it difficult to identify defective parts and reducing work efficiency.
Innovation Solution
The design features a direct-mounting connector placed parallel to the center axis, allowing for detachable electrical and mechanical connections, enabling simultaneous assembly or inspection on one side and reducing the length along the center axis, while also preventing foreign matter entry and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inverter-device is mounted along the center axis of the electric compressor with compressor terminal and harness connector disposed on opposite faces, then the electrical connection is achieved, but the length along the center axis becomes long and assembly/inspection efficiency deteriorates
Solution Approach 1:
The patent changes the spatial arrangement from a linear center-axis configuration to a radial configuration where the connector is disposed on the lateral surface of the inverter-device. This dimensional change allows electrical connection while reducing the center axis length, as the connector extends perpendicular to the center axis direction rather than along it.
2Reliability
If compressor terminal and harness connector are disposed on opposite faces of the inverter-device, then electrical connection is achieved, but assembly and inspection work efficiency deteriorates due to difficulty in assembling/inspecting along one direction
Solution Approach 1:
The patent employs asymmetric positioning of the connector on the lateral surface of the inverter-device, specifically on one end face rather than distributing terminals symmetrically on opposite faces. This asymmetric arrangement allows all electrical connections to be accessed from one side, enabling simultaneous assembly and inspection operations along a single direction, thereby improving work efficiency.
3Reliability
If the inverter-device is soldered to the electric compressor, then electrical connection is achieved, but the compressor must be brought to the assembly/inspection site of the inverter-device, lowering work efficiency and making independent testing impossible
Solution Approach 1:
The patent segments the electrical connection system into two independent parts: the compressor terminal fixed to the electric compressor and the harness connector fixed to the inverter-device. These segmented connectors can be independently assembled, tested, and inspected at different locations, then connected through detachable connection. This segmentation enables independent testing of the inverter-device without requiring the compressor to be transported to the inspection site.
4Device complexity
If the inverter-device and electric compressor are integrated with fixed connections, then the structure is compact, but it becomes difficult to identify defective parts during malfunction
Solution Approach 1:
The patent introduces dynamic, detachable connection between the compressor terminal and harness connector, allowing the electrical connection to be separated when needed. This dynamic connection enables independent testing of each component (inverter-device and compressor) by connecting them only during operation and separating them during inspection or repair, making defective part identification straightforward while maintaining compact integration during normal operation.
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 enhances work efficiency during assembly and inspection by allowing independent handling of electrical and mechanical components, improves reliability by preventing foreign matter entry, and reduces the overall size of the compressor.
Implementation Method 1
The inverter-device is cooled by refrigerant 30 sucked in
Data Source
AI summary
An inverter-device built-in type electric compressor includes a compressor terminal and a direct-mounting connector, which connects the inverter-device to an external circuit, at an electric compressor side. The direct-mounting connector faces toward the electric compressor and is placed in parallel with a center axis of the electric compressor. A harness connector wired from a motor of the electric compressor is detachably and electrically connected to the compressor terminal, and the electric compressor is detachably and mechanically connected to the inverter-device.