Ceiling-Concealed Airflow Control for More Uniform Room Heating
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Solution Overview
Problem
The ceiling-concealed air-conditioning apparatus with an air outlet on the outer side of the air inlet experiences limited air circulation, leading to slower increase in indoor air temperature, especially at positions far from the apparatus, and tends to turn off warm air supply before the whole room is warm, resulting in inefficient heating.
Innovation Solution
A ceiling-concealed air-conditioning apparatus with a blowing direction flap that changes the air flow direction based on temperature detection, allowing the controller to adjust the blowing direction from horizontal to perpendicular during heating, increasing the intake air temperature at which warm air supply is turned off, thus enhancing air circulation and temperature distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the air outlet is formed on the outer side of the air inlet, then the device structure is simplified, but the air circulation range is limited and temperature distribution becomes uneven
Solution Approach 1:
The patent applies a blowing direction flap that can dynamically change orientation between horizontal and perpendicular positions. This dynamic adjustment allows the system to adapt air circulation patterns to different operational needs, resolving the contradiction between simplified structure and temperature distribution by making the airflow direction adjustable rather than fixed.
Solution Approach 2:
The patent changes the blowing direction parameter (angle relative to ceiling surface) based on operational phase. During heating operation, it switches from horizontal blowing to perpendicular blowing, thereby changing the air circulation pattern and expanding the effective heating range despite the outer-side air outlet configuration.
2Productivity
If downward blow is used during heating operation, then air circulation is enhanced, but warm air supply turns off prematurely before the whole room becomes warm
Solution Approach 1:
The system dynamically adjusts the blowing direction flap orientation based on the operational phase and temperature conditions. It transitions from horizontal to perpendicular blowing during heating, and the controller monitors intake air temperature to determine when to maintain or adjust warm air supply, preventing premature shutdown.
Solution Approach 2:
The controller uses feedback from the temperature detector to monitor intake air temperature and determines warm air supply status accordingly. This feedback mechanism ensures that warm air supply continues as long as the room needs heating, even when using perpendicular blowing direction, thereby preventing premature termination of heating.
3Area of stationary object
If perpendicular blowing direction is used, then air circulation range is expanded, but intake air temperature increases causing premature warm air supply turn-off
Solution Approach 1:
The controller continuously monitors intake air temperature via the temperature detector and uses this feedback to determine whether to maintain perpendicular blowing and continue warm air supply. When intake air temperature rises, the controller evaluates whether to adjust the blowing direction or maintain supply based on overall room heating needs, preventing premature turn-off despite temperature increase.
Solution Approach 2:
The system changes the warm air supply control parameter (turn-off temperature threshold) based on the blowing direction being used. When perpendicular blowing is active, the controller adjusts its decision criteria for warm air supply termination, allowing continued supply even when intake air temperature increases, thereby coordinating with the expanded air circulation range.
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 allows for a higher intake air temperature during perpendicular blowing, increasing the indoor air temperature of the whole room without premature warm air supply turn-off, even when the air outlet is on the outer side of the air inlet, ensuring more efficient heating.
Implementation Method 1
a blowing direction flap, which is configured to change a blowing direction of an air blown from the air outlet
Implementation Method 2
a temperature detector, which is configured to detect an intake air temperature of air sucked from the air inlet
Implementation Method 3
during a heating operation, warm air supply, which is a supply of conditioned air, is turned off when an intake air temperature detected by the temperature detector becomes equal to or higher than a predetermined temperature
Data Source
AI summary
Provided is a ceiling-concealed air-conditioning apparatus, including: a casing having an opening; a panel, which is provided to the opening and has an air inlet and an air outlet formed on an outer side of the air inlet; a blowing direction flap, which is configured to change a blowing direction of an air blown from the air outlet; a temperature detector, which is configured to detect an intake air temperature of air sucked from the air inlet; and a controller, which is configured to control the blowing direction flap, wherein the controller is configured to, during a heating operation, turn off warm air supply at an intake air temperature higher in a case in which the blowing direction flap is oriented in a horizontal direction relative to a ceiling surface than in a case where the blowing direction flap is oriented in a perpendicular direction relative to the ceiling surface.