Blower and air-conditioning indoor unit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Air conditioners with existing blowers often cause discomfort due to airflow hitting local body parts, as the airflow speed varies significantly across different heights, leading to uneven air distribution.
Innovation Solution
A blower with an airflow adjusting mechanism that adjusts the blow-out airflow to ensure equal average speeds in upper and lower ranges and a ratio less than 1.5 to the central range, reducing variation and directing airflow uniformly across the body, using blades that spread airflow downward and upward due to the Coanda effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the blow-out airflow is directed straight forward without adjustment, then the airflow speed in the central range is high, but the airflow speed varies significantly across different heights causing uneven air distribution and user discomfort
Solution Approach 1:
The airflow adjusting mechanism divides the single blow-out airflow into three separate airflow paths corresponding to upper, central, and lower ranges. This segmentation allows independent control of airflow speed in each height range, enabling the central range to maintain high speed while upper and lower ranges are adjusted to achieve more uniform distribution across the user's body.
Solution Approach 2:
Different airflow speeds are assigned to different height ranges based on local requirements. The central range maintains high airflow speed for effective cooling/heating, while the upper and lower ranges are adjusted to provide complementary airflow. This local quality approach ensures that each part of the user's body receives appropriate airflow intensity, resolving the contradiction between central airflow speed and overall distribution uniformity.
2Speed
If the airflow is concentrated in a narrow vertical range, then the airflow speed in the central range is high, but the air distribution coverage is limited and does not cover the whole body uniformly
Solution Approach 1:
The airflow adjusting mechanism segments the airflow into three vertical zones (upper, central, lower ranges) that can be independently controlled. This segmentation expands the effective coverage area from a narrow central stream to a broader vertical distribution that covers the user's head, torso, and lower body, while maintaining high speed in the central range for effective thermal impact.
Solution Approach 2:
The invention transitions from a two-dimensional airflow pattern (horizontal spread only) to a three-dimensional pattern by adding vertical dimension control through the airflow adjusting mechanism. This allows the airflow to cover a much larger spatial volume, expanding from a narrow horizontal stream to a comprehensive three-dimensional distribution that envelops the user's entire body.
3Stability of the object's composition
If multiple airflow direction adjustment mechanisms are added to achieve uniform distribution, then airflow distribution improves, but the device complexity increases
Solution Approach 1:
The airflow adjusting mechanism serves multiple functions simultaneously: it divides the airflow into three ranges, adjusts the direction of each range independently, and controls the airflow speed distribution. This multi-functionality achieves uniform airflow distribution across the user's body without requiring separate adjustment mechanisms for each function, thereby limiting the increase in device complexity.
Solution Approach 2:
The invention merges the airflow division, direction control, and speed adjustment functions into a single integrated airflow adjusting mechanism. By combining these functions that would otherwise require separate mechanisms, the design achieves uniform airflow distribution while minimizing the increase in device complexity.
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 configuration reduces airflow speed variation, minimizing discomfort by ensuring a consistent airflow distribution across the body, improving user comfort and reducing temperature variation, thus enhancing cooling or heating efficiency and reducing power consumption.
Implementation Method 1
a control unit executes a Coanda effect utilization mode, whereby outlet air whose air direction has been adjusted by a first air direction adjustment plate can be changed to a Coanda air flow which, because of the Coanda effect, flows along an undersurface of a second air direction adjustment plate
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A suction port (14) and a blow-out port (15) are formed in a casing (11). A fan (12) is provided in the casing (11). Under a test condition that a blower is provided in such a way that a reference position (Q) of the blow-out port (15) is a position that is separated by 2000 mm upward from a floor, an airflow adjusting mechanism (20) adjusts, in a wide mode, a flow of air blown out from the blow-out port (15) so that an average airflow speed in a first range (R11) and an average airflow speed in a second range (R12) are approximately equal to each other and so that a ratio of an average airflow speed in a third range (R13) to the average airflow speed in the first range (R11) is less than 1.5.