External Rotor Destratification Fan Assembly
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Solution Overview
Problem
Existing destratification fan assemblies for industrial environments operate with low efficiency due to large kinematic chains and inefficient motor groups, leading to suboptimal air movement and potential vortex formation.
Innovation Solution
A destratification fan assembly with a compact, high-efficiency electric motor group featuring an external rotor design, where the motor is directly connected to the blade group, minimizing the kinematic chain and optimizing torque for efficient air movement, with the motor and command electronics integrated within the air flow to enhance cooling and protection from environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large-sized blade groups with complex kinematic chains are used, then air movement capability is improved, but motor efficiency deteriorates and device complexity increases
Solution Approach 1:
The patent extracts and eliminates the reducer component from the kinematic chain, creating a direct-drive system where the motor connects directly to the blade group. This removal of the intermediate mechanical transmission element reduces energy losses and simplifies the overall system while maintaining the large blade diameter needed for effective air movement.
Solution Approach 2:
The patent replaces the traditional mechanical reduction gear system with an electrical control system. The motor operates at higher speeds and uses electronic control to achieve the desired low blade rotation speed, substituting mechanical complexity with electrical intelligence and improving overall efficiency.
2Productivity
If large-sized blade groups with reducers are used, then air movement capability is improved, but device complexity increases
Solution Approach 1:
The patent removes the reducer from the system, eliminating the complex mechanical transmission components including gears, shafts, and couplings. This direct-drive approach significantly reduces device complexity while maintaining the large blade diameter necessary for effective destratification and air movement.
3Speed
If electric motor groups operate at low speeds, then blade rotation control is improved, but motor efficiency deteriorates
Solution Approach 1:
The patent employs dynamic control through electronic speed regulation of the motor, allowing the motor to operate efficiently at higher speeds while the blade group rotates at the required low speed. The system adapts the motor operating point to maintain high efficiency across varying load conditions and rotational requirements.
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 solution achieves high efficiency air movement with reduced vortex formation, maintaining component durability and efficiency up to 90%, while allowing for flexible power supply connections and compact design suitable for large-diameter rotors.
Implementation Method 1
electric motor group (4) supporting said blade group (3) and supported by said support frame (2)
Implementation Method 2
suitable for moving elevated air masses contained in said industrial environments in such a way as to cause a change in its state
Implementation Method 3
with the motor and command electronics integrated within the air flow to enhance cooling and protection from environmental factors
Data Source
AI summary
A destratification fan assembly of an industrial environment includes a support frame fixable to the ceiling of the industrial environment, a blade group rotatable about a main axis (X-X) and an electric motor group supporting the blade group and supported by the support frame. The electric motor group includes a drive shaft having a blade end to which the blade group is solidly connected, an electric motor operatively connected to the drive shaft to guide it in rotation, and an electronic command device of the electric motor for commanding the electric motor. In some embodiments, the electric motor includes a rotor and a stator, wherein the rotor is of the external rotor type.