Package Compressor Cooling Layout With Dual Air Inlets
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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 suction port of the fan duct offset to balance airflow and reduce pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single air suction port is used, then the structure is simple, but the cooling air flow rate is limited and pressure loss is high
Solution Approach 1:
The single air suction port is segmented into multiple air suction ports (first air suction port and second air suction port) positioned at different locations on the casing. This segmentation increases the total cooling air intake area and allows for better distribution of cooling air to different components, thereby increasing the overall cooling air flow rate while maintaining structural simplicity
Solution Approach 2:
The air suction ports are positioned at different locations (different dimensions) on the casing - one on the front surface and another on the side surface. This spatial distribution in multiple dimensions allows the system to overcome the flow rate limitation of a single port without significantly increasing structural complexity
2Ease of operation
If the cooling air flow path is extended to reach all components, then all components can be cooled, but the pressure loss increases
Solution Approach 1:
The cooling air flow path is segmented into multiple separate paths: one path from the first air suction port to the body unit, and another path from the second air suction port to the controller. This segmentation allows each component to be cooled by cooling air traveling a shorter distance, thereby reducing the overall pressure loss while maintaining comprehensive cooling coverage
Solution Approach 2:
The casing acts as an intermediary structure that facilitates direct cooling air delivery to multiple components. By positioning air suction ports and ducts strategically within the casing, the system creates efficient intermediate cooling paths that reduce the total distance cooling air must travel, thereby reducing pressure loss
3Ease of operation
If cooling air is directed through long ducts, then all components are cooled, but the flow rate to individual components decreases
Solution Approach 1:
The cooling system is segmented into multiple independent cooling channels, each serving specific components. The first air suction port connects to the body unit through a dedicated duct, while the second air suction port connects to the controller through another dedicated duct. This segmentation allows each component to receive sufficient cooling air flow rate independently, rather than sharing flow through a single long duct
Solution Approach 2:
The air suction ports are positioned in different spatial dimensions (front surface and side surface of the casing) to create shorter, more direct cooling paths to different components. This dimensional distribution reduces the length of cooling ducts and increases the cooling air flow rate to individual components while maintaining comprehensive cooling coverage
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 the body unit and controller, reduces the need for additional cooling fans, and minimizes the compressor's size while improving sound insulation.
Implementation Method 1
a cooling fan (centrifugal fan) accommodated in the case
Implementation Method 2
The first duct guides the cooling air from the air suction port to the motor of the body unit to cool the motor. The second duct causes the cooling air from the air suction port to flow along the controller to cool the controller.
Implementation Method 3
The cooling air having cooled the motor and the controller cools the heat exchanger.
Data Source
AI summary
A package-type compressor includes a body unit, a controller, a casing, a first cooling air inlet, a second cooling air inlet, a cooling air outlet, a fan duct, a cooling fan, an air cooling type heat exchanger, a machine chamber, and a cooling duct. The cooling duct is provided below the fan duct, the cooling duct causing the cooling air taken in at the second cooling air inlet to flow along the controller toward the suction port of the fan duct. A vertical projection plane of the cooling fan overlaps the machine chamber and the cooling duct.