Vehicle Washer Pump Waterproof Membrane Air Vent

Solution Overview

Problem

Existing washer pump apparatuses for vehicles are prone to moisture intrusion and inadequate heat dissipation, particularly in exposed environments, which can lead to electrical device failure.

Innovation Solution

A washer pump apparatus with a waterproof structure featuring a pump housing with a closed lower portion, a terminal cap with a membrane member allowing air passage while blocking water, and a noise filter to prevent moisture and heat-related issues, including a guide member and waterproof O-ring for enhanced sealing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If an air passage is provided for heat cooling from a lower side of the pump housing to an upper side of the pump housing, then heat dissipation is improved, but moisture is likely to enter the motor through the air passage

Engineering Contradiction:

Improveheat dissipationVSAvoidmoisture intrusion

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

A waterproof film is installed in the air passage to create a barrier that prevents moisture from entering the motor while still allowing heat to dissipate through the passage. The flexible film selectively blocks water molecules while permitting thermal energy transfer.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

A porous plug is positioned in the air passage to allow heat dissipation while blocking moisture intrusion. The porous structure permits air flow and heat transfer but prevents water molecules from passing through, resolving the contradiction between cooling and waterproofing.

Inventive Principle:

Principle #31Porous materials

2Adaptability or versatility

If the pump housing is installed in an engine room exposed to moisture, then the apparatus can operate in harsh environments, but moisture can enter the motor or electrical devices

Engineering Contradiction:

Improveenvironmental adaptabilityVSAvoidelectrical device protection

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A waterproof film is installed in the air passage to create a barrier that prevents moisture from entering the motor while still allowing heat to dissipate through the passage. The flexible film selectively blocks water molecules while permitting thermal energy transfer.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

A porous plug is positioned in the air passage to allow heat dissipation while blocking moisture intrusion. The porous structure permits air flow and heat transfer but prevents water molecules from passing through, resolving the contradiction between cooling and waterproofing.

Inventive Principle:

Principle #31Porous materials

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 prevents moisture intrusion and facilitates heat dissipation, ensuring the reliability and longevity of electrical components in the washer pump apparatus, even in harsh conditions.

Implementation Method 1

A membrane member including multiple pores that block water molecules and allow passage of air molecules therethrough is placed in the air vent

Methodology Applied

Scientific EffectSelective permeation: Permeation

Data Source

PatentUS10138905B2Washer pump apparatus for vehicle provided with improved water-proof structure

Publication Date: 2018.11.27 DYAUTO

AI summary

Provided is a washer pump apparatus for a vehicle, the washer pump apparatus having an improved waterproof structure. The water pump apparatus includes a pump housing including a washer liquid inlet, a washer liquid outlet, a closed lower portion, an impeller, and a motor configured to rotate the impeller, a terminal cap coupled to an upper portion of the pump housing and forming a waterproof structure, the terminal including a structure for connection to a waterproof connector, and an air vent for communication of an outer space of the terminal cap with an inner space, wherein a membrane member including multiple pores that block water molecules and allow passage of air molecules therethrough is placed in the air vent.