Brushless Variable-Speed Fan for Ultra-Low-Temperature Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ultra-low-temperature cooling devices face issues with noise and energy inefficiency due to uncontrolled fan motor operation and oversizing, leading to increased electrical energy consumption and reduced compressor performance.
Innovation Solution
A brushless, speed-controllable DC voltage motor is used for the fan motor, allowing speed adjustment based on operating conditions, with a voltage converter to provide a constant DC voltage and a temperature sensor to regulate fan speed, along with a power factor correction and delay mechanism to prevent refrigerant leaks and optimize compressor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the fan motor is operated at fixed speed and full power to ensure adequate heat dissipation, then the cooling performance is maintained, but the electrical energy consumption increases and energy efficiency decreases
Solution Approach 1:
The fan motor speed is made dynamically adjustable through electronic control rather than fixed operation. The control unit varies the fan speed according to actual cooling requirements, allowing the system to adapt between full power operation during high heat dissipation needs and reduced speed during steady-state operation, thereby reducing overall energy consumption while maintaining adequate cooling performance
Solution Approach 2:
The operating parameters of the fan motor are changed from fixed speed to variable speed control. By adjusting the rotational speed parameter based on actual thermal conditions, the system optimizes the balance between heat dissipation effectiveness and energy consumption, avoiding unnecessary energy waste during periods when full fan power is not required
2Temperature
If the fan motor operates continuously at high speed to maintain optimal cooling conditions, then the cooling performance is ensured, but the noise emission increases
Solution Approach 1:
The fan motor speed is dynamically adjusted based on actual cooling requirements rather than operating continuously at maximum speed. During steady-state operation at target temperature, the fan runs at reduced speed, significantly lowering noise emissions from both the motor and fan blades, while still maintaining adequate heat dissipation and cooling performance
Solution Approach 2:
The fan operation is made periodic and variable rather than continuous and constant. The control system adjusts fan speed in response to changing thermal conditions, allowing the fan to operate at high speed only when necessary for heat dissipation and at low speed or idle when cooling demands are met, thereby reducing overall noise exposure
3Power
If the fan motor is oversized to handle peak cooling demands, then the cooling capacity is sufficient, but the energy efficiency decreases during steady-state operation
Solution Approach 1:
The oversized fan motor's capability is made dynamically可利用 through electronic speed control. During peak cooling demands, the fan operates at full power to utilize the complete cooling capacity. During steady-state operation, the speed is reduced to match actual cooling needs, allowing the system to have sufficient peak capacity without continuously operating at inefficient high power levels, thereby improving overall energy efficiency
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 solution reduces fan noise and electrical power consumption, enhances energy efficiency, and prevents refrigerant leaks by adjusting fan speed according to compressor performance, maintaining optimal air flow and reducing the risk of explosion.
Implementation Method 1
a brushless, speed-controllable DC voltage motor is used for the fan motor
Implementation Method 2
with a voltage converter to provide a constant DC voltage
Implementation Method 3
guide incoming air through an air inlet via the condenser and the compressors to an air outlet and thus ensure favorable or the operating conditions of the units required for cooling operation
Data Source
Figure 1~2
AI summary
The invention relates to a cooling device fan device, in particular for ultra-low temperature cooling devices, having a fan rotor (12) and located in an air duct between an air inlet (16), a cooling device heat exchanger (15) and/or a cooling device compressor (14) and an air outlet (18) that can be provided on or in a cooling device housing (20, 22) and that can be connected to a unit of the cooling device, in particular the cooling device compressor and/or cooling device control electronics, via electrical supply and/or control lines the fan motor (10) is implemented as a brushless, speed-controllable DC voltage motor whose operating speed is controlled or controllable as a function of an operating and/or useful cooling range temperature signal, in particular of the associated or assignable cooling device compressor.