Cleaner head and cleaner comprising same
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Solution Overview
Problem
The existing cleaner head designs are prone to overheating of the drive motor due to increased load, which can lead to motor failure or fire, and the use of a thermostat to cut off power does not effectively manage size constraints.
Innovation Solution
A cleaner head design with a drive assembly that includes a drive motor, a drive housing, a thermostat to cut off power, and a heat transfer structure to manage heat from the drive motor, where the thermostat is spaced apart from the drive motor and the heat transfer structure efficiently transfers heat to the thermostat, preventing overheating and maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thermostat is attached to the surface of the drive motor to cut off power according to temperature, then overheating protection is improved, but the size of the brush drum increases due to the thickness of the thermostat
Solution Approach 1:
The patent relocates the thermostat from a direct surface attachment to a position spaced apart from the drive motor along the rotation axis direction. This dimensional repositioning allows the thermostat to be integrated into the drive assembly structure without increasing the radial thickness of the brush drum, thus maintaining compact size while achieving overheating protection through thermal conduction from the motor to the thermostat via the spaced arrangement
Solution Approach 2:
The thermostat is integrated within the drive assembly structure, nested among other components such as the drive motor and drive housing. This nesting approach allows the thermostat to occupy space within the existing assembly volume rather than adding external thickness, thereby protecting against overheating without increasing the overall brush drum size
2Volume of moving object
If the drive motor is positioned closer to the brush drum to reduce size, then compactness is improved, but heat management becomes more difficult leading to overheating risks
Solution Approach 1:
The drive housing serves as an intermediary thermal management structure between the drive motor and the brush drum. It provides a controlled thermal pathway that allows heat dissipation while maintaining the compact integration of components. The housing acts as a thermal mediator that prevents direct heat transfer to critical areas while still allowing the thermostat to monitor and respond to motor temperature through the spaced arrangement
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 prevents overheating of the drive motor and maintains a compact size for the brush drum, reducing the risk of motor failure and fire while ensuring efficient operation.
Implementation Method 1
a heat transfer structure configured to transfer heat from the drive motor to the thermostat
Data Source
AI summary
A cleaner head is provided. The cleaner head includes a brush drum rotatable about a rotation axis, a brush case rotatably supporting the brush drum, and a drive assembly arranged inside the brush drum and configured to provide a rotational force to the brush drum, wherein the drive assembly includes a drive motor, a drive housing that accommodates the drive motor, is arranged between an inner circumferential surface of the brush drum and an outer circumferential surface of the drive motor, and is supported by an end of the brush case, a thermostat that is configured to cut off power supplied to the drive motor according to a temperature, and is arranged to be spaced apart from the drive motor in a direction of the rotation axis, and a heat transfer structure configured to transfer heat from the drive motor to the thermostat.