Electric motor assembly and surface cleaning apparatus
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Solution Overview
Problem
Wet cleaning devices face issues with water vapor entering the motor assembly, leading to contamination and noise during suction, which affects the appearance and service life of the device.
Innovation Solution
A motor assembly with a cyclone bracket that guides airflow to condense water vapor into liquid on the inner side wall of the housing, using noise-reducing mesh plates to separate and discharge water vapor effectively, while reducing noise through multiple noise-reducing cavities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fan is used to suck in wastewater during wet cleaning, then cleaning capability is improved, but water vapor enters the motor assembly causing contamination and noise
Solution Approach 1:
The housing is divided into separate functional zones: a first housing portion for air outlet and a second housing portion for water outlet. The cyclone bracket creates separate flow paths that segment the mixed airflow into distinct air and water vapor streams, allowing independent discharge of each component.
Solution Approach 2:
The cyclone bracket extracts water vapor from the mixed airflow by generating centrifugal force. The water vapor is separated and directed to the second housing portion for discharge, while clean air exits through the first housing portion, effectively removing the harmful component.
2Reliability
If water vapor accumulates inside the motor assembly housing, then the appearance is adversely affected, but no immediate functional failure occurs
Solution Approach 1:
The cyclone bracket acts as an intermediary device between the motor body and the housing. It intercepts water vapor in the airflow and redirects it through a separate discharge path, preventing direct contact with the motor assembly and housing interior surfaces.
3Productivity
If the fan operates at high speed to improve cleaning efficiency, then productivity increases, but noise generation increases significantly
Solution Approach 1:
The noise-reducing mesh plates extract high-frequency noise components from the airflow. By placing multiple mesh plates at different locations in the airflow path, the system filters out noise while maintaining the cleaning function.
Solution Approach 2:
Different sections of the housing have different noise reduction characteristics. The first and second housing portions are designed with specific mesh plate configurations tailored to their respective functions, creating localized noise reduction zones without compromising overall cleaning performance.
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
The solution effectively separates water vapor into liquid for discharge, preventing contamination and prolonging the service life of the motor assembly while significantly reducing operational noise.
Implementation Method 1
the working airflow carrying water vapor is condensed into liquid on an inner side wall of the housing through the cyclone bracket
Implementation Method 2
a cyclone bracket, arranged between the motor body and the housing and configured to guide a working airflow
Implementation Method 3
a first noise-reducing mesh plate, arranged on the cyclone bracket and surrounding an outer side of the bracket vanes; and a second noise-reducing mesh plate, arranged on a side of the cyclone bracket away from the bracket vanes
Data Source
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AI summary
Disclosed in the embodiments of the present disclosure are an electric motor assembly and a surface cleaning apparatus. The electric motor assembly comprises: a shell, which comprises an air outlet and a water outlet; an electric motor body, which is arranged inside the shell and is configured to provide working power; and a cyclone bracket, which is arranged between the electric motor body and the shell and is configured to guide working airflow, wherein the cyclone bracket, the electric motor body and the shell are approximately arranged in a coaxial manner; the working airflow carrying moisture is discharged from the electric motor body, then flows through the cyclone bracket, and is condensed into liquid on an inner side wall of the shell, and finally the liquid is discharged from the water outlet; and the working airflow which is not condensed into liquid is discharged from the air outlet. The electric motor assembly provided in the embodiments of the present disclosure is provided with a water discharge path and an air discharge path, such that the working airflow entering the fan can be subjected to water-air separation; and the air and water are simultaneously discharged from the electric motor assembly, such that the use of the electric motor assembly is optimized.