Outdoor Unit Snowfall Detection for Air Discharge Reliability
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Solution Overview
Problem
Existing air conditioners face efficiency issues due to snow accumulation on outdoor units, which can block air discharge passages and deteriorate performance, and existing snowfall detection systems are prone to damage and unstable installation as they directly contact snow.
Innovation Solution
A non-contact snowfall detection device is mounted on the grill of the outdoor unit, using sensors to detect snow accumulation from above, with a stable fixation mechanism to prevent damage and ensure reliable operation, and a control system to manage snow removal based on temperature and sensor data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a snowfall detection part directly contacts snow to detect snowfall amount, then detection function is achieved, but the detection part may be damaged or have difficulty in stable installation and fixation
Solution Approach 1:
The patent introduces an intermediary structure (grill) between the snowfall detection part and the snow. The detection part is positioned behind the grill, detecting snow accumulation indirectly through the grill structure rather than direct contact. This intermediary approach allows the detection function to be maintained while protecting the detection part from damage and ensuring stable installation.
Solution Approach 2:
The detection part is positioned in a different spatial dimension (behind the grill) rather than directly exposed to snow. By changing the detection dimension from direct front-facing contact to indirect detection through the grill structure, the system achieves both detection accuracy and reliability.
2Productivity
If snow accumulates on the outdoor unit, then air discharge passage is blocked and air discharge efficiency deteriorates, but the outdoor unit continues to operate
Solution Approach 1:
The snowfall detection part detects snow accumulation before it completely blocks the air discharge passage. By detecting snowfall in advance and triggering the snow removal operation proactively, the system prevents complete blockage and maintains air discharge efficiency. The control unit initiates fan motor operation to remove snow before it reaches a critical level.
Solution Approach 2:
The system implements a feedback mechanism where the snowfall detection part continuously monitors snow accumulation on the outdoor unit. When snow accumulation reaches a threshold level, the control unit receives this information and automatically activates the snow removal operation by controlling the fan motor. This closed-loop feedback ensures timely intervention to maintain productivity.
3Ease of operation
If the outdoor unit operates in snowy conditions, then heating/cooling function is maintained, but snow accumulation blocks air discharge and reduces efficiency
Solution Approach 1:
The system implements periodic snow removal operations based on detected snowfall conditions. When the snowfall detection part identifies snow accumulation, the control unit periodically activates the fan motor to remove snow, then returns to normal operation. This periodic intervention allows the outdoor unit to maintain continuous heating/cooling functionality while periodically clearing snow blockages to preserve air discharge efficiency.
Data Source
AI summary
An air conditioner may have a structure in which a snowfall detection device is attached to a grill and a case, and an amount of snow accumulated on the grill is detected in a non-contact manner to control an operation of the air conditioner. The snowfall may be more stably and reliably detected, and also the air conditioner may more stably and reliably operated.