Method for controlling a single-flow ventilation system
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Solution Overview
Problem
Conventional mechanical ventilation systems in residential buildings lack the ability to accurately identify pollution sources, leading to overconsumption and over-extraction of air in rooms that do not require ventilation, and result in a complexification of the system with multiple controls and vents.
Innovation Solution
A method for controlling a single-flow ventilation system that involves measuring pollution in both main and technical rooms using dedicated sensors, comparing these measurements with a central control unit, identifying air extraction needs, and adjusting fan motor speed and regulator operation to optimize air distribution and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pollution sensors are positioned only in utility rooms, then the system structure is simple, but the ventilation system cannot accurately identify pollution sources leading to overconsumption and over-extraction of air
Solution Approach 1:
The patent segments the sensor deployment by positioning pollution sensors in both utility rooms and main rooms, allowing differentiated measurement of pollution sources. This segmentation enables the system to identify which specific room generates pollution, preventing unnecessary ventilation in unaffected areas and reducing overall energy consumption.
Solution Approach 2:
The patent implements local quality by enabling the ventilation system to respond locally to pollution sources. When a sensor detects pollution in a specific room, only the ventilation system serving that room is activated, rather than activating the entire building's ventilation system, thus reducing energy waste in unaffected areas.
2Reliability
If exhaust vents are added to main rooms, then indoor air quality in main rooms is improved, but the system complexity and number of controls increase
Solution Approach 1:
The patent applies universality by enabling utility room exhaust vents to serve dual functions: they extract air from utility rooms and also provide ventilation for adjacent main rooms when pollution is detected there. This eliminates the need for separate exhaust vents in main rooms, maintaining air quality improvement while reducing system complexity.
Solution Approach 2:
The patent merges the ventilation function for main rooms into the existing utility room exhaust system. By allowing utility room vents to handle pollution from both utility rooms and adjacent main rooms, the system combines multiple functions into a single infrastructure, avoiding the need for additional vents and controls in main rooms.
3Reliability
If the fan motor speed is increased to ensure sufficient vacuum, then the proper functioning of the installation is maintained, but the energy consumption increases
Solution Approach 1:
The patent implements dynamics by enabling the fan motor speed to vary dynamically based on actual system needs. The control system adjusts the fan speed according to the operating state of regulators and actual pollution levels, rather than maintaining constant high speed, thus ensuring proper installation functioning while minimizing energy consumption.
Solution Approach 2:
The patent applies parameter changes by adjusting the fan motor speed parameter according to system conditions. The control system modifies the fan speed parameter to maintain sufficient vacuum for regulator operation while optimizing energy consumption, adapting the parameter to match actual ventilation requirements rather than using a fixed high value.
Data Source
Figure 1
AI summary
The invention relates to a method for controlling a single-flow ventilation system (1), characterized in that it comprises the following steps: - Step A: Pollution measurement in at least one main room (12) of the residential building (10) by means of at least one main room pollution sensor (3), - Step B: Pollution measurement in at least one technical room (11) of the residential building (10) by means of at least one technical room pollution sensor (2), - Step C: Comparison of the measurements carried out in step A and in step B by means of a computer (7) of a central control unit (4), - Step D: Identification of the air extraction requirements for each technical room (11) and/or each main room (12) by means of the computer (7) of the central control unit (4), - Step E: Control of the air distribution according to the requirements identified in step D from the central control unit (4) to at least one controller (8).Air distribution is achieved using a self-learning mode of the central control unit (4). - Step F: Actuation of at least one regulator 8 associated with an extraction branch (6) according to the distribution command of step E, - Step G: Control of the fan motor speed (9).