Air conditioning apparatus and electric control box
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Solution Overview
Problem
In air conditioning systems, the high temperatures within electric control boxes can cause condensation of air into water, which may short-circuit or damage electronic elements and potentially lead to fires due to the flow of condensed water to sensitive components.
Innovation Solution
An electric control box design featuring a heat dissipation member with a heat exchanging body and a fluid-collecting tube assembly, where the mounting plate separates the chambers to prevent condensed water from flowing into the area with electronic elements, and a heat dissipation member is thermally connected to the electronic elements to manage heat effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipation member is used to cool the electric control box, then the temperature inside the box is reduced, but condensed water may form and flow to electronic elements causing short-circuits or damage
Solution Approach 1:
The electric control box is divided into two separate chambers by a mounting plate: a first chamber for the heat dissipation member and a second chamber for electronic elements. This segmentation prevents condensed water formed during heat dissipation from reaching the electronic elements, thus maintaining reliability while achieving effective cooling.
Solution Approach 2:
The mounting plate acts as an intermediary barrier between the heat dissipation member and electronic elements. It physically separates the two components, preventing direct contact between condensed water and electronic elements while still allowing the heat dissipation function to operate effectively.
2Productivity
If the heat dissipation member is placed directly among electronic elements for efficient heat dissipation, then heat dissipation efficiency is improved, but the risk of condensed water damaging electronic elements increases
Solution Approach 1:
By segmenting the electric control box into separate chambers, the design maintains efficient heat dissipation in the first chamber while protecting electronic elements in the second chamber from condensed water damage. The separation ensures that heat dissipation functionality is preserved without exposing electronics to moisture risks.
Solution Approach 2:
The electronic elements are extracted from the heat dissipation environment and placed in a separate second chamber. This extraction removes them from the harmful condensed water zone while maintaining their thermal management needs through the designed thermal connection via the mounting plate.
3Reliability
If the electric control box is sealed to protect electronic elements from condensed water, then electronic element protection is improved, but heat dissipation efficiency deteriorates
Solution Approach 1:
The sealed enclosure is segmented into two chambers, allowing the first chamber to be sealed for protecting electronic elements from condensed water while the second chamber maintains thermal connection for effective heat dissipation. This segmentation enables simultaneous achievement of protection and heat dissipation efficiency.
Solution Approach 2:
The mounting plate serves as a thermal intermediary that enables heat transfer from electronic elements to the heat dissipation member while maintaining the sealed separation. This intermediary structure allows thermal communication without physical mixing of the two chambers, preserving both protection and heat dissipation functionality.
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 design effectively prevents water from reaching sensitive components, reducing the risk of short-circuits and fires while enhancing heat dissipation, thus ensuring the reliability and safety of the air conditioning system.
Implementation Method 1
at least part of the heat exchanging body is received in the first cavity and is thermal-conductively connected to the electronic element
Implementation Method 2
When the air that is in the electric control box and is in a high temperature contacts the heat dissipation member, the air may be condensed into water
Data Source
AI summary
The electric control box includes a box body, a mounting board, an electronic component, and a heat sink, the box body being provided with a mounting cavity; the mounting plate is disposed in the mounting cavity and the mounting cavity forms a first cavity and a second cavity located on the two sides of the mounting board; the electronic component is arranged in the second cavity; the heat sink comprises a heat exchange body and a header assembly; the header assembly is used for providing refrigerant flow to the heat exchange body; at least part of the heat exchange body is arranged in the first cavity, and is heat-conductively connected to the electronic component; the mounting board is used for blocking the condensed water on the heat sink from flowing into the second cavity.