Fan Speed Control for Timed Temperature Achievement
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Solution Overview
Problem
Existing air conditioning systems in pre-cooling mode often fail to achieve the set temperature by the designated time due to inadequate consideration of fan rotation speed and air volume settings, leading to potential user discomfort and inefficiency.
Innovation Solution
A control device and method that calculates the required operation time for achieving a set temperature by varying fan rotation speeds, selecting the optimal speed to ensure the temperature is reached by the desired time, and adjusting speeds as necessary to minimize power consumption or ensure timely completion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the indoor unit fan is operated without changing air volume settings from the previous stop, then the operation is simple and energy-consuming is reduced, but the setting temperature cannot be achieved by the setting time
Solution Approach 1:
The control device performs preliminary calculation of the required operation time for achieving the setting temperature at each fan rotation speed before actually operating the fan. This allows the system to pre-determine the optimal rotation speed that will achieve the setting temperature by the setting time, rather than simply maintaining the previous speed setting.
Solution Approach 2:
The fan rotation speed is made dynamic and adjustable based on calculated requirements. Instead of operating the fan at a fixed speed from previous settings, the control device calculates and selects from multiple possible rotation speeds to optimize the cooling performance and ensure the setting temperature is achieved within the required time.
2Productivity
If the fan rotation speed is increased to achieve the setting temperature faster, then the cooling performance is improved, but the power consumption increases
Solution Approach 1:
The control device changes the fan rotation speed parameter based on calculated requirements. By calculating the operation time needed at each rotation speed and comparing it with the time remaining until the setting time, the system selects the appropriate rotation speed that achieves the setting temperature efficiently without unnecessarily high power consumption.
Solution Approach 2:
The control device uses feedback from the calculated operation times to determine the optimal fan rotation speed. The calculation unit computes how long it will take to achieve the setting temperature at each rotation speed, and this feedback information is used to select the most appropriate speed that balances cooling performance with energy efficiency.
Data Source
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AI summary
Provided is a control method for a fan of a heat source device capable of achieving a set temperature by a set time. The control device comprises: a setting reception unit that receives setting of a set temperature for a target whose temperature is adjusted by a heat source device and a set time when the set temperature should be achieved; a calculation unit that calculates, for each of a plurality of rotation speeds, an operation time required to achieve the set temperature when a fan provided to the heat source device is operated at a prescribed one of the rotation speeds, and selects the rotation speed at which the set temperature can be achieved by the set time, among the plurality of the rotation speeds, on the basis of the operation time calculated for each of the rotation speeds; and a control unit that operates the heat source device while rotating the fan at the selected rotation speed.