Waterproof Control Apparatus Ventilation Filter Mounting
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Solution Overview
Problem
Existing waterproof control apparatuses face challenges in withstanding direct water pouring during high-pressure washing, especially when the water-repellent filter is mounted on the cover, which leads to complex and expensive ventilation structures, or when mounted on the base, where it is difficult to bond and fix the filter due to material constraints, and the filter cannot effectively radiate heat.
Innovation Solution
A waterproof control apparatus with a water-repellent filter mounted inside the connector housing, featuring a porous material with fine pores that prevents water intrusion and allows air passage, integrated with a respiratory ventilation hole that communicates with the outer air, and a waterproof packing to prevent water entry, allowing for simple and cost-effective mounting on various surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the water-repellent filter is mounted on the cover, then the ventilation function is achieved, but the structure becomes complex and expensive due to high-pressure washing resistance requirements
Solution Approach 1:
The patent extracts the water-repellent filter from the cover and relocates it to the base, specifically to a position away from direct water spray paths. This separation removes the need for complex high-pressure washing resistant structures on the cover while maintaining the ventilation function through the base.
2Object-affected harmful factors
If the water-repellent filter is mounted on the back-side portion of the base, then direct water pouring resistance is improved, but bonding and fixing becomes difficult on sheet metal or aluminum die-cast bases
Solution Approach 1:
The patent applies local quality by providing a resin coating layer only at the specific mounting position on the base where the water-repellent filter is installed. This localized resin layer enables bonding without requiring the entire base to be made of resin, thus facilitating easy fixing on sheet metal or aluminum die-cast bases while maintaining water resistance at the filter location.
3Ease of manufacture
If the water-repellent filter is mounted on the resin base, then bonding and fixing is easy through thermal welding, but heat radiation through the base is reduced
Solution Approach 1:
The patent uses local quality by applying the resin coating layer only at the filter mounting position rather than making the entire base of resin. This allows the base to maintain its original material properties for heat radiation while providing easy bonding capability only where needed for the filter attachment.
4Object-affected harmful factors
If a complex ventilation structure is designed to withstand direct water pouring, then water resistance is improved, but the cost increases
Solution Approach 1:
The patent extracts the ventilation function from the water-exposed cover area and relocates it to the base where water exposure is minimal. This allows the use of a simple ventilation structure without complex high-pressure washing resistance features, thereby reducing cost while maintaining water resistance.
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 enables the apparatus to withstand direct water pouring without complex mounting structures, allows for functional testing, reduces pressure differences, and facilitates heat radiation, making it suitable for various mounting angles and environments.
Implementation Method 1
a water-repellent filter which is formed of a porous material including a plurality of fine pores for preventing water drops from intruding into the case and for letting the air freely pass therethrough
Implementation Method 2
a respiratory ventilation structure that equalizes an air pressure between an inside and an outside of the case by exposing air inside the case to the outer air through the water-repellent filter
Implementation Method 3
a heat-generating component, and in which a temperature rise in the heat-generating component causes an air-pressure difference between respective air pressures in inside and outside of the case
Data Source
AI summary
A case configured with a base and a cover watertightly contains a circuit board, and a connector housing having a diaphragm is mounted in the circuit board so that the inside and the outside of the case are electrically connected with each other; an outer ring-shaped circumferential wall is provided on the outer surface of the diaphragm, and a protrusion portion having first and second ventilation holes is provided at the side surface of the outer ring-shaped circumferential wall; one end of each of the first and second ventilation holes communicates with the outer surface portion of a water-repellent filter provided on the inner wall surface of the diaphragm, and the other end thereof communicates with the inside of a recess portion that is situated at a side of a mating connector and fits with the protrusion portion.