Electromagnetic Relay Venting Structure for Moisture Release
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Solution Overview
Problem
Existing electromagnetic relays face challenges in effectively releasing moisture while preventing the entry of foreign matter and contaminants, particularly due to limited ventilation routes that can lead to contact failures.
Innovation Solution
The electromagnetic relay incorporates a ventilation route at the joint area between a plate and a case, which communicates the inside with the outside, utilizing grooves and holes to enhance moisture release while minimizing the entry of contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vent area is increased to increase ventilation efficiency, then moisture release is improved, but foreign matter such as bugs and dust can easily enter the electromagnetic relay
Solution Approach 1:
The ventilation route is divided into multiple sections: the first groove in the plate, the second groove in the case, and connecting holes. This segmentation allows the total vent area to be distributed across multiple locations, improving moisture release efficiency while each individual opening remains small enough to prevent foreign matter entry.
Solution Approach 2:
The ventilation route transitions from simple planar vents to a three-dimensional path through grooves and holes. The route extends through the thickness of the plate and case, creating a longer, more tortuous path that prevents direct entry of foreign matter while maintaining effective moisture ventilation.
2Reliability
If vents are provided in slits of the case member through which terminals are inserted, then ventilation is achieved, but contaminants such as grease and silicone can adhere to terminals and flow along them into the electromagnetic relay
Solution Approach 1:
The ventilation function is extracted from the terminal insertion slits and relocated to dedicated grooves and holes in the plate and case. This separation ensures that the ventilation route is independent of the terminal pathways, preventing contaminants from traveling along terminals into the relay.
Solution Approach 2:
The ventilation route acts as an intermediary pathway that is physically separated from the terminal insertion paths. By providing a dedicated ventilation channel through grooves and holes rather than using the terminal slits, the design prevents direct communication between the external environment and the internal space through contaminant-prone terminal paths.
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 releases moisture while reducing the entry of foreign matter and contaminants, maintaining the relay's functionality and reducing the risk of contact failures.
Implementation Method 1
a ventilation route at a fitting part that contacts with the plate when the case is fitted to the plate, the ventilation route communicating an inside of the electromagnetic relay, in which the functional unit is present, with an outside of the electromagnetic relay
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
An electromagnetic relay (1) includes a functional unit (10; 20; 30) configured to execute an electromagnetic relay process, a plate (40) having a flat shape, the functional unit (10; 20; 30) being mounted on the plate (40), and a case (50) having a box shape and covering the functional unit (10; 20; 30) when fitted to the plate (40). The case (50) has a ventilation route (52; 54; 55) at a fitting part (51) that contacts with the plate (40) when the case (50) is fitted to the plate (40), the ventilation route (52; 54; 55) communicating an inside of the electromagnetic relay (1), in which the functional unit (10; 20; 30) is present, with an outside of the electromagnetic relay (1).