Package-type compressor
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Solution Overview
Problem
The existing package-type compressor design faces limitations in cooling performance due to a single air suction port, long cooling air flow paths, and high pressure loss, making it difficult to increase the flow rate of cooling air for the body unit and controller, and balancing the flow rates between different ducts.
Innovation Solution
The design includes multiple cooling air inlets on opposite sides of the casing, a fan duct with a vertically oriented cooling fan, and a cooling duct to efficiently direct cooling air to the body unit and controller, with the center of the fan duct's suction port offset to balance airflow and improve cooling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single air suction port is used in the prior-art technique, then the structure is simple, but the cooling performance is insufficient due to long flow paths and high pressure loss
Solution Approach 1:
The single air suction port is segmented into multiple air suction ports positioned at different locations on the casing. This segmentation shortens the cooling air flow paths, reduces pressure loss, and improves cooling performance for both the body unit and controller without significantly increasing structural complexity.
Solution Approach 2:
Air suction ports are added at multiple spatial locations (different dimensions) on the casing surface, transitioning from a single-point suction to a multi-point distributed suction system. This dimensional expansion optimizes the cooling air flow distribution and reduces path length.
2Adaptability or versatility
If the cooling air flow path is extended to reach all components, then all components can be cooled, but the pressure loss increases and flow rate decreases
Solution Approach 1:
The cooling air flow path is segmented into multiple shorter paths originating from different air suction ports. Each port serves specific components in its proximity, reducing the overall path length and pressure loss while maintaining comprehensive cooling coverage for all heat-generating components.
Solution Approach 2:
Different air suction ports are strategically positioned to provide localized cooling to specific components. The cooling air flow paths are optimized locally for each component group, ensuring adequate cooling without requiring excessively long flow paths that would increase pressure loss.
3Reliability
If cooling air is directed through long ducts to the controller, then the controller can be cooled, but the flow rate to the controller is insufficient
Solution Approach 1:
The cooling system is segmented to provide dedicated cooling paths for the controller, separate from the body unit cooling paths. This segmentation ensures that the controller receives sufficient cooling air flow rate through its own optimized flow path, improving both cooling reliability and flow rate.
Solution Approach 2:
An intermediate air suction port is positioned near the controller to serve as a dedicated cooling air source. This intermediary port acts as a local cooling station, providing sufficient cooling air flow rate to the controller without requiring air to travel through long ducts from distant suction ports.
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 cooling performance for both the body unit and controller, reduces pressure loss, and allows for a more balanced airflow, eliminating the need for a dedicated cooling fan and reducing the compressor's size while maintaining effective sound insulation.
Implementation Method 1
a cooling fan (centrifugal fan) accommodated in the case
Implementation Method 2
The cooling air having cooled the motor and the controller cools the heat exchanger
Implementation Method 3
an air cooling type heat exchanger arranged above the delivery port of the fan duct and below the cooling air outlet
Data Source
AI summary
Provided is a package-type compressor that can improve cooling performance for cooling a body unit and a control panel. The package-type compressor includes: a cooling fan accommodated in a fan duct to induce a flow of cooling air taken in through inlets and discharged through an outlet; a machine chamber that causes the cooling air taken in at the inlet to flow along a body unit; and a cooling duct that causes the cooling air taken in at the inlet to flow along the control panel. A center position of the suction port of the fan duct is offset away from the inlet and toward the inlet with respect to a center position of a drive shaft of a motor of the body unit.