Ventilating device
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Solution Overview
Problem
Conventional ventilation devices lack the ability to dynamically adjust air flow distribution within a building to meet varying occupancy and comfort needs, such as during sleep, which can lead to inefficient air pressure management and ventilation effectiveness.
Innovation Solution
An adjustable branching device on the supply line directs air flow to additional supply air openings, and an operatively connected throttle device on the discharge line adjusts exhaust air flow to maintain pressure neutrality, allowing for two distinct operational modes: a higher air volume flow during occupancy and a lower flow during sleep, utilizing a common actuator for both devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional ventilation device operates with a fixed air flow rate, then the system structure is simple, but the ventilation effectiveness and pressure management cannot adapt to varying occupancy and comfort needs
Solution Approach 1:
The patent applies dynamics by making the air flow rate adjustable through a control unit that regulates the supply air fan based on detected occupancy levels. The system transitions from a fixed flow rate to a variable flow rate that adapts to different situations (occupancy, sleep mode, away mode), resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
The patent changes the parameter of air flow rate from constant to variable. The control unit adjusts the supply air flow rate between different levels (e.g., first flow rate for occupancy, second flow rate for sleep mode, third flow rate for away mode) based on detected conditions, enabling the system to adapt ventilation effectiveness without requiring complete structural redesign.
2Productivity
If the supply air flow rate is increased to meet occupancy needs, then ventilation effectiveness improves, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the supply air flow rate based on detected occupancy and mode conditions. During occupancy, a higher first flow rate provides adequate ventilation effectiveness. During sleep mode or away mode, the system reduces to lower flow rates (second or third flow rate), significantly reducing power consumption while maintaining acceptable ventilation levels.
Solution Approach 2:
The control unit periodically evaluates detected information (occupancy status, mode selections) and adjusts the air flow rate accordingly. This periodic adjustment between high and low flow rates based on changing conditions optimizes the balance between ventilation effectiveness and energy consumption over time.
3Use of energy by moving object
If the ventilation device operates in low flow mode during sleep, then power consumption is reduced, but maintaining pressure neutrality becomes more difficult
Solution Approach 1:
The control unit continuously monitors the operational mode and detected occupancy information, then adjusts the supply air flow rate to maintain pressure neutrality. When in sleep mode with reduced flow, the control unit compensates by adjusting the exhaust air flow or modifying supply/exhaust timing to ensure that pressure neutrality is maintained despite the lower overall air flow, thus maintaining reliability.
Data Source
Figure 1~2
AI summary
The invention relates to a ventilation device comprising a supply line (1) with an outside air opening (1.1) opening outside a building and an inside air supply opening (1.2), and an exhaust line (2) with an inside air supply opening (2.1) and an outside air exhaust opening (2.2). According to the invention, an adjustable branch device (3) is provided on the supply line (1), from which a branch line (3.1) leads to an additional inside air supply opening (3.2), and an adjustable throttling device (4) is provided on the exhaust line (2) and is operatively connected to the branch device (3).