Communication Interface PCB Layout for Air Conditioner ESD Discharge
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Solution Overview
Problem
The existing air conditioner designs that incorporate a resin housing for the connector body require additional components like a spring-like metal plate, screw, and ground path to manage static electricity, leading to increased complexity and part count.
Innovation Solution
An air conditioner with a communication interface featuring a resin housing that includes a pattern wiring on the control board for electrostatic discharge, connected to the ground via wiring, which discharges static electricity before the communication module is electrically connected, simplifying the configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a resin housing is used for the connector body, then the housing can be made lighter and more cost-effective, but additional components (spring-like metal plate, screw, ground path) are required to manage static electricity, increasing device complexity
Solution Approach 1:
The patent combines multiple functions into the control board: it serves as both the electrical connection interface (via the first connector) and the static electricity discharge path (via the pattern wiring to ground). This integration eliminates the need for separate ground path components while maintaining static electricity discharge capability.
Solution Approach 2:
The control board acts as an intermediary element that provides both electrical connection and static electricity discharge functions. The pattern wiring on the control board serves as a mediator to discharge static electricity from the communication module to ground before the module is fully connected to the first connector.
2Ease of manufacture
If a resin housing is used for the connector body, then manufacturing cost is reduced, but the number of parts increases due to required static electricity management components
Solution Approach 1:
The control board integrates multiple functions: electrical connection through the first connector and static electricity discharge through the pattern wiring. This merging of functions reduces the total number of parts while maintaining both electrical connectivity and electrostatic discharge capabilities.
Solution Approach 2:
The control board is designed to perform multiple functions simultaneously: it provides electrical connection for data communication and serves as a ground path for static electricity discharge. This multi-functionality eliminates the need for dedicated separate components for each function.
3Reliability
If additional components are added for static electricity discharge, then static electricity can be effectively removed, but the configuration becomes more complicated
Solution Approach 1:
The control board combines electrical connection and static electricity discharge functions into a single integrated component, eliminating the need for separate ground path components and simplifying the overall configuration while maintaining reliable static electricity discharge capability.
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 removes static electricity with a simpler structure, preventing damage to semiconductor elements and circuit malfunctions even when the housing is made of resin.
Implementation Method 1
a pattern wiring 42 for discharging static electricity from the communication module 200 before the communication module 200 is electrically connected to the first connector 41
Data Source
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AI summary
An air conditioner includes an indoor equipment, a wiring (13) connected to the indoor equipment at one end, and a communication interface (100) connected to another end of the wiring (13) and electrically connected to the indoor equipment via the wiring (13). The communication interface (100) includes a housing (101) made of resin, an insertion hole formed in the housing (101) and into which a communication module (200) of a cartridge type is inserted, and a control board (40) provided inside the housing (101). The communication interface (100) includes a first connector (41) provided on a board surface (401) of the control board (40) and electrically connected to the communication module (200). The communication interface (100) includes a pattern wiring (42) provided on the board surface (401) and discharging static electricity from the communication module (200) before the communication module (200) is electrically connected to the first connector (41).