Pump Motor Socket Sealing to Prevent Moisture-Induced Tracking
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Solution Overview
Problem
Pump motors in household appliances that use water, such as washing machines, are prone to moisture ingress, leading to short-circuiting and tracking phenomena, which can result in fires due to electrical connections being compromised by moisture.
Innovation Solution
A pump motor design that includes a case with a socket part and a detachable cover part, featuring a moisture blocking member along the edge of the socket part and barriers between terminals, along with drain holes to prevent moisture ingress and facilitate its discharge, thereby preventing tracking and potential fires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pump motor is provided inside the household appliance using water, then the appliance can discharge used water effectively, but moisture may be introduced into the terminal part causing short-circuiting or tracking phenomenon
Solution Approach 1:
The pump motor is divided into separate functional sections: a motor housing containing the electrical components and a pump housing containing the water handling components. The motor housing is further segmented into an upper section and a lower section connected by a ridge, creating distinct zones for different functions. This segmentation isolates electrical components from moisture exposure while maintaining water discharge functionality.
Solution Approach 2:
A ridge structure acts as an intermediary element connecting the upper and lower sections of the motor housing. This ridge serves as both a structural connector and a functional barrier that prevents moisture from the pump section from reaching the terminal part in the motor section, thereby protecting electrical connections while maintaining structural integrity.
2Ease of repair
If a detachable cover part is added to open and close the socket part, then maintenance access is improved, but the complexity of the device structure increases
Solution Approach 1:
The cover part serves multiple functions simultaneously: it provides maintenance access to the terminal part, seals the socket part to prevent moisture ingress, and structurally connects to the motor housing. By combining these functions into a single component, the design avoids adding excessive complexity while achieving ease of repair and protection.
Solution Approach 2:
The detachable cover part is designed as a multi-functional element that performs sealing, protection, and access provision. This universal component addresses multiple requirements (maintenance accessibility, moisture protection, structural support) without requiring separate dedicated parts for each function, thereby managing device complexity effectively.
Data Source
AI summary
A pump motor is disclosed. The pump motor includes a case; a socket part disposed in a portion of the case and provided with a terminal part thereinside; and a cover part detachably coupled to the case and configured to open and close the socket part, wherein the socket part includes a moisture blocking member configured to block a gap between the case and the cover part.