Washing Machine Motor Assembly With Heat Sink Mounted Control Board
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Solution Overview
Problem
The separation of the synchronous electric motor and its electronic control board in washing machines requires complex wiring, making assembly difficult and increasing maintenance costs due to the need for extensive wiring connections.
Innovation Solution
The heat sink element is mounted on the stator in an axial extension, with the electronic control board supported on the heat sink facing the stator, allowing for a reduced wiring connection through direct clutch connectors and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the electronic control board is separated from the synchronous electric motor, then the motor assembly is simplified and cooling is improved, but the wiring complexity increases and assembly difficulty increases
Solution Approach 1:
The heat sink element serves as an intermediary component that mechanically and electrically connects the electronic control board to the motor assembly. By mounting the control board on the heat sink element rather than directly integrating it into the motor, the patent creates a modular intermediate structure that simplifies both cooling and electrical connections while reducing wiring complexity
Solution Approach 2:
The patent merges the cooling function and electrical connection function into a single integrated component - the heat sink element. This element simultaneously provides thermal management for the electronic control board and serves as the mounting structure and electrical interface, thereby reducing the number of separate components and wiring connections needed
2Device complexity
If the electronic control board is integrated inside the motor, then wiring is reduced, but the motor trim modification cost increases and assembly complexity increases
Solution Approach 1:
The patent segments the motor system into distinct functional modules: the synchronous electric motor, the heat sink element, and the electronic control board. This segmentation allows each component to be manufactured and assembled separately without requiring modifications to the motor trim, while still achieving reduced wiring complexity through the modular connection structure
Solution Approach 2:
The heat sink element acts as an intermediary that provides a standardized mounting interface between the electronic control board and the motor assembly. This intermediate structure eliminates the need to modify the motor trim for board integration, as the heat sink element provides the necessary mechanical and electrical interface in a separate, easily manufacturable component
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 simplifies the assembly of the electric motor, reduces wiring complexity, and lowers maintenance costs by allowing direct electrical connection without modifying the stator, while maintaining effective cooling and protection of the electronic board.
Implementation Method 1
a heat sink element associated with the electronic board
Implementation Method 2
heat sink element... that can possibly be cooled with ease
Data Source
AI summary
Synchronous electric motor (3) for washing-machines (1) and similar household appliances with rotary drum (2), of the type comprising an inner stator (5) having relative stator windings (9) mounted fixed on a central axis (10), an electronic control board (18) electrically connected to the stator, and a heat sink element (20) associated with the electronic board (18). The heat sink element (20) is mounted on the stator (5) in an axial extension thereof and spaced therefrom. The electronic control board (18) is supported by the heat sink (20) on a side facing the stator (5).