Room air conditioning system
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Solution Overview
Problem
Conventional room air conditioning systems with human body sensors to detect presence under multiple target areas become complex and expensive due to the need to cover multiple detection zones.
Innovation Solution
A room air conditioning system with multiple indoor units installed on a ceiling, each equipped with rotatable flaps in blow-off openings that can independently change airflow angles and human body sensors, allowing the controller to perform airflow control and temperature evenness control by adjusting flap angles based on sensor data to avoid blowing air directly into individuals and reduce temperature unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If human body sensors are installed to detect persons in multiple target areas, then person detection accuracy is improved, but device complexity increases and cost increases
Solution Approach 1:
A single human body sensor is designed to detect persons across multiple target areas by rotating its detection beam or positioning mechanism, allowing one sensor to perform the function of multiple sensors would have provided, thereby reducing system complexity while maintaining detection coverage
Solution Approach 2:
The human body sensor is made rotatable or movable to dynamically change its detection direction, enabling it to cover different target areas at different times. This dynamic capability allows one sensor to replace multiple fixed sensors, reducing device complexity while preserving comprehensive person detection accuracy
2Productivity
If air is blown directly into target areas, then cooling efficiency is improved, but comfort deteriorates when persons are present
Solution Approach 1:
The system uses human body sensor feedback to detect the presence of persons in target areas and dynamically adjusts the airflow direction accordingly. When a person is detected, the flap mechanism redirects airflow away from the person, preventing discomfort while maintaining overall cooling efficiency through coordinated control of multiple indoor units
Solution Approach 2:
The flap mechanisms in the blow-off openings are made rotatable to dynamically change airflow directions based on real-time person detection. This allows the system to adapt airflow patterns continuously, maintaining high cooling efficiency by directing air to unoccupied areas while avoiding direct airflow onto persons, thus eliminating discomfort
3Manufacturing precision
If multiple flaps are installed in blow-off openings to control airflow directions, then airflow control precision is improved, but device complexity increases
Solution Approach 1:
The airflow control function is segmented across multiple independent indoor units, each with its own flap mechanism. Rather than one complex centralized system, each unit has simplified flap structures that independently control airflow for their respective target areas, reducing individual component complexity while achieving precise overall airflow control through coordinated operation
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 system effectively reduces room temperature unevenness without directly blowing air into people by using independent airflow control and temperature evenness control strategies, simplifying the sensor configuration and reducing system complexity while maintaining effectiveness.
Implementation Method 1
The plurality of flaps are rotatably disposed in the respective blow-off openings and are capable of independently changing vertical angles of airflows
Implementation Method 2
The human body sensor detects whether a person is present below a corresponding one of the plurality of indoor units
Implementation Method 3
the controller causes a corresponding one of the indoor units that detects the absence to perform the temperature evenness control
Data Source
AI summary
A room air conditioning system includes a plurality of indoor units and a controller. Each of the plurality of indoor units includes: an air conditioner main body having a plurality of blow-off openings formed therein; a plurality of flaps rotatably that are disposed in the respective blow-off openings and that can independently change vertical angles of airflows; and a human body sensor that detects whether a person is present below a corresponding one of the plurality of indoor units. When at least one of the human body sensors in the plurality of indoor units detects the absence of a person in a state of selecting the airflow control, the controller causes a corresponding one of the indoor units that detects the absence to perform the temperature evenness control. This room air conditioning system successfully reduces unevenness of room temperature.