Air Conditioner Blade Guide Redirecting Cold Air to Prevent Dew
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Solution Overview
Problem
Dew formation occurs at the upper side of the blade in air conditioners when the rotary shaft is positioned there, leading to inefficient air discharge and potential moisture issues.
Innovation Solution
The rotary shaft of the blade is positioned in the upper portion of the discharging port, and a guide unit is integrated with the drainage tray to direct cold air discharge to the lower side of the blade, preventing dew formation by ensuring air is not discharged to the upper side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the rotary shaft of the blade is provided in an upper portion of the discharging port, then the blade structure is simplified and easier to manufacture, but dew formation occurs at the upper side of the blade due to cold air discharge
Solution Approach 1:
A guide unit is introduced as an intermediary component between the blade and the discharging port. The guide unit has a guiding surface that directs cold air flow toward the lower side of the blade, preventing direct contact between cold air and the upper side of the blade where the rotary shaft is located. This mediator structure resolves the dew formation issue while maintaining the simplified upper-positioned rotary shaft configuration.
Solution Approach 2:
The guide unit creates a localized airflow control zone at the discharging port. By shaping the guiding surface with specific curvature and inclination, the patent locally modifies the cold air flow characteristics to redirect it away from the upper side of the blade. This local quality change allows the upper rotary shaft position to be maintained without causing dew formation.
2Object-affected harmful factors
If the rotary shaft is positioned in the center portion of the discharging port, then dew formation is prevented, but the blade structure becomes more complex and air discharge efficiency decreases
Solution Approach 1:
The guide unit serves as a mediator that enables the use of a simpler upper-positioned rotary shaft while achieving the same dew prevention effect as the center-positioned shaft. The guide unit's guiding surface redirects airflow to compensate for the shifted shaft position, maintaining effective dew prevention without the complexity of a center-mounted rotary shaft mechanism.
Solution Approach 2:
Instead of positioning the rotary shaft in the center to prevent dew formation, the patent inverts the approach by positioning the rotary shaft in the upper portion and using a guide unit to redirect airflow. This inverse configuration achieves the same protective effect while simplifying the blade structure and improving air discharge efficiency.
3Device complexity
If cold air is discharged through the upper side of the blade, then the blade structure is simpler, but dew formation occurs and air discharge efficiency is reduced
Solution Approach 1:
The guide unit acts as a mediator that redirects cold air flow away from the upper side of the blade while maintaining the simple upper-positioned rotary shaft structure. By controlling the airflow direction through its guiding surface, it prevents dew formation and maintains optimal air discharge efficiency without complicating the blade structure.
Solution Approach 2:
The guide unit modifies the airflow parameters (direction, velocity distribution) by shaping its guiding surface. This parameter change redirects the cold air toward the lower side of the blade, preventing dew formation and maintaining high air discharge efficiency while keeping the blade structure simple with the upper rotary shaft position.
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 effectively prevents dew formation at the upper side of the blade by ensuring cold air is discharged to the lower side, maintaining efficient air flow and reducing moisture issues within the air conditioner.
Implementation Method 1
a heat exchanger that cools indoor air sucked through the suction port
Implementation Method 2
a cross flow fan that enables the indoor air to be sucked through the suction port, and enables cold air cooled by the heat exchanger to be discharged into a room through the discharging port
Implementation Method 3
a guide unit that protrudes towards the blade from the stabilizer unit to prevent the cold air from being discharged through a gap between the blade and the stabilizer unit in a state in which the blade is opened
Data Source
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Figure 6~7
AI summary
An indoor unit including a heat exchanger that cools indoor air sucked through a suction port, a cross flow fan that enables the indoor air to be sucked through the suction port, and enables cold air cooled by the heat exchanger to be discharged into a room through a discharging port, a drainage tray unit that is disposed below the heat exchanger to collect condensate water generated in the heat exchanger, and a blade that is rotatably coupled to the drainage tray unit to open the discharging port, and whose rotary shaft is formed in an upper portion of the discharging port. The drainage tray unit includes a guide unit that prevents the cold air from being discharged to an upper side of the blade so that the cold air is discharged to a lower side of the blade when the blade is opened.