Electric Blower Cooling Air Routing for Pressurized Motor Cooling
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Solution Overview
Problem
Existing electric blower apparatuses face inefficiencies in cooling the electric motor and control electronics, requiring separate cooling air flows, which leads to suboptimal energy management and potential contamination risks.
Innovation Solution
The apparatus features separate cooling air flows for the electric motor and control electronics, utilizing pressurized air routed through distinct openings in the blower spiral, with flow throttles to enhance dwell time and reduce contamination, allowing for efficient energy utilization and independent cooling adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling air blower is used to induce cooling air flow through the electric motor, then the electric motor can be cooled effectively, but additional electric energy is consumed and the blower output is reduced
Solution Approach 1:
The system uses the electric motor's own drive output to create the cooling air flow by generating a pressure region in the blower spiral, eliminating the need for a separate cooling air blower. The pressurized air flow is directed through the electric motor via the first cooling air opening, allowing the motor to cool itself using its operational energy rather than requiring additional dedicated cooling energy.
2Temperature
If cooling air flow is routed through the electric motor first and then to control electronics, then both components can be cooled, but the cooling air for control electronics is already heated and cooling efficiency is reduced
Solution Approach 1:
The cooling system is segmented into two independent cooling air flows: a first cooling air flow for the electric motor and a second cooling air flow for the control electronics. The first flow is directed through the pressurized air opening through the motor, while the second flow is separately directed through the control electronics housing. This segmentation allows each component to receive fresh, unheated cooling air, maximizing cooling efficiency for both components simultaneously.
3Reliability
If the electric motor drives both the fan wheel and the cooling air blower, then all cooling functions are provided, but the blower output is reduced due to shared drive energy
Solution Approach 1:
The electric motor provides its own cooling function by utilizing its drive output to generate a pressure region that creates the cooling air flow. This self-service approach eliminates the need for a separate cooling air blower, allowing the motor's drive energy to be fully utilized for fan wheel operation while maintaining effective cooling through the pressurized air flow mechanism.
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 ensures effective cooling of both the electric motor and control electronics while optimizing energy use, reducing contamination risks, and allowing for customizable cooling based on individual heat source requirements.
Implementation Method 1
a cooling air flow which is routed through or about the electric motor and cools the latter being discharged from the blower spiral by way of the at least one cooling air opening
Implementation Method 2
a cooling air flow which is routed through or about the electric motor and cools the latter
Data Source
AI summary
The disclosure relates to an electric blower apparatus having a blower spiral and a fan wheel rotating in the blower spiral. For driving the fan wheel, an electric motor is disposed on an axial end face of the blower spiral, the drive shaft of the electric motor protruding through a shaft opening in the axial end face and into the blower spiral and being connected to the fan wheel. Configured in the axial end face of the blower spiral is a cooling air opening by way of which a cooling air flow that flows about the electric motor is routed. To guarantee sufficient cooling of the driving electric motor at a minimal consumption of electric energy, it is provided that the cooling air opening is disposed in a pressure region of the blower spiral such that the cooling air flow to the electric motor is a pressurized air flow.