Air Conditioner Outdoor Unit Heat Exchanger Path for EMI Discharge
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Solution Overview
Problem
The outdoor unit of air conditioners generates electromagnetic noise due to the control box's connection terminal, which is not efficiently discharged, leading to potential interference.
Innovation Solution
A current carrying path, comprising a metal tape and connection clip, electrically connects the control box to the outdoor heat exchanger, allowing electromagnetic noise to be discharged to the air through the heat exchanger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control box is formed of metal material for fire resistance, then fire resistance is improved, but electromagnetic noise is generated and not efficiently discharged
Solution Approach 1:
The patent introduces a current carrying path as an intermediary component between the control box and the outdoor heat exchanger. This path includes a metal tape and connection clips that conduct electromagnetic noise from the control box to the heat exchanger, which then dissipates it into the air. This mediator resolves the contradiction by providing a dedicated channel for noise discharge while maintaining the metal control box for fire resistance.
Solution Approach 2:
The patent converts the harmful electromagnetic noise generated by the metal control box into a benefit by directing it through the current carrying path to the outdoor heat exchanger. The heat exchanger, being connected to the air flow system, effectively dissipates the noise into the surrounding air, transforming the harmful noise into a harmless environmental discharge.
2Object-generated harmful factors
If a current carrying path is added to discharge electromagnetic noise, then electromagnetic interference is reduced, but device complexity increases
Solution Approach 1:
The patent makes the outdoor heat exchanger serve multiple functions: its original heat exchange function plus an additional function of dissipating electromagnetic noise into the air. By utilizing the existing air flow path and the heat exchanger's metallic structure, the system eliminates the need for a separate noise discharge component, thereby reducing overall device complexity while still achieving EMI reduction.
Solution Approach 2:
The patent merges the noise discharge function with the existing heat exchanger and air flow system. The current carrying path is integrated into the existing structural components (using metal tape and connection clips attached to existing parts), combining the noise discharge pathway with the thermal exchange pathway, thus avoiding additional independent systems and reducing 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
Effectively reduces electromagnetic interference by transmitting noise from the control box to the outdoor heat exchanger, where it is dissipated into the air, enhancing the operational efficiency and reducing interference.
Implementation Method 1
a current carrying path to electrically connect the control box and the outdoor heat exchanger
Implementation Method 2
an outdoor heat exchanger to exchange heat with outdoor air
Data Source
AI summary
An outdoor unit of an air conditioner includes a current carrying path formed between a control box and an outdoor heat exchanger, and electromagnetic noise generated in the control box is transmitted to the outdoor heat exchanger and efficiently discharged to air through the outdoor heat exchanger.