Wall-Mounted AC Suction Layout for Stable Vortex Airflow
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Solution Overview
Problem
Prior wall-mounted air-conditioning apparatuses face issues with reduced suction opening area, increased ventilation resistance, generation of separation vortices, rotation noise, and back-flow phenomena, leading to instability in circulation vortex behavior and frequent filter cleaning due to uneven dust accumulation.
Innovation Solution
A wall-mounted air-conditioning apparatus with an upper suction port and inclined air guide wall in the front grill, positioned between specific lines passing through the impeller and stabilizer, to stabilize the circulation vortex and prevent back-flow, while maintaining a uniform air flow across heat exchangers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the suction opening area in the front grill is reduced and wall faces are added to improve design aesthetics, then the visual appearance is improved, but ventilation resistance increases and air amount decreases
Solution Approach 1:
The suction opening is divided into multiple segments: the front grill suction opening (with wall faces for aesthetics) and the upper suction port (larger opening). This segmentation allows the front grill to maintain its aesthetic design with reduced opening area while the upper suction port compensates by providing additional air intake to maintain overall air amount.
2Stability of the object's composition
If the suction opening is directed upward to prevent straight flow to heat exchanger, then uniform air flow across heat exchangers is improved, but separation vortexes are generated causing rotation noise
Solution Approach 1:
An air flow guide is introduced as an intermediary component between the upward-directed suction opening and the heat exchanger. This guide modifies the flow path to prevent straight flow to the heat exchanger (maintaining uniform air flow) while also reducing the generation of separation vortexes that cause rotation noise.
3Reliability
If the circulation vortex behavior becomes unstable due to dust accumulation on filter, then ventilation resistance increases, but back-flow phenomenon occurs causing condensation and respiration noise
Solution Approach 1:
The air flow guide is positioned to preliminarily guide air flow before it reaches the filter and heat exchanger areas. This preliminary action maintains stable circulation vortex behavior even when dust accumulates on the filter, preventing the back-flow phenomenon that would otherwise occur due to increased ventilation resistance.
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 solution secures a sufficient air amount for stable suction, reduces noise, prevents condensation on the blow-out port, and minimizes dust accumulation, resulting in a silent and energy-efficient air-conditioning system with reduced filter cleaning frequency.
Implementation Method 1
a cross flow fan having an impeller disposed inside the main body
Implementation Method 2
a front-face heat exchanger arranged on the main-body front face side of the air-conditioning apparatus main body, a heat exchanger arranged on the main-body back face side
Implementation Method 3
a stabilizer which separates the inside of the main body into an impeller suction region and an impeller blow-out region
Implementation Method 4
an arc-shaped guide wall disposed on the impeller blow-out region side and which sucks air from the impeller suction region and blows out the sucked air into the impeller blow-out region
Data Source
AI summary
An upper suction port is formed in a main-body upper part of an air-conditioning apparatus main body, a suction opening part is formed in a front grill disposed on a main-body front face of the air-conditioning apparatus, a suction opening whose opening is directed upward is formed by consecutively providing an air guide wall inclined downward inside the main body on the upper edge of the suction opening, and the suction opening is located between a part, in the main-body height direction, lower than a straight line passing through a rotation center of an impeller and a closest contact point between the impeller and a front-face heat exchanger and a part, in the main-body height direction, higher than a straight line parallel with the straight line and passing through the impeller and a tongue part of a stabilizer.