Electric Suction Head Cooling Air Routing for Stronger Vacuum Flow
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Solution Overview
Problem
Existing electric suction heads face inefficiencies in both suction and energy efficiency due to reduced air flow and negative pressure for cooling, which compromises the suction effect and leads to potential overheating of the electric motor, especially under high power consumption.
Innovation Solution
The air outlet openings are strategically arranged on the underside of the housing to direct cooling air towards the suction mouth edges, enhancing the total suction air flow while ensuring adequate cooling, with multiple openings and adjustable cross-sections to prevent clogging and maintain tight seals, and an optional bypass for emergency cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If secondary air flow is used for cooling the electric motor, then the motor cooling is improved, but the suction-effective amount of air is reduced
Solution Approach 1:
The patent merges the cooling air flow and suction air flow into a single unified flow path. The cooling air that passes over the motor is directed through the suction mouth to the cyclone separator, where it combines with the suction air. This integration allows the cooling function to contribute to the suction function rather than competing with it, resolving the contradiction between motor cooling and suction effectiveness.
Solution Approach 2:
The secondary air flow serves dual functions: it cools the electric motor by passing over it and simultaneously contributes to the suction effect by entering the suction mouth and being processed by the cyclone separator. This multi-functionality eliminates the waste of having separate cooling and suction air flows, maximizing the utility of each air molecule.
2Temperature
If cooling air openings are provided in the housing, then motor cooling is improved, but seal tightness deteriorates
Solution Approach 1:
The patent extracts the cooling air intake function from the sealed housing structure. Instead of providing cooling openings in the housing that would compromise the seal, the cooling air is introduced through the existing suction mouth opening. This separates the cooling function from the housing seal integrity, allowing both to coexist without compromise.
Solution Approach 2:
The suction mouth serves dual purposes: it is the primary entry point for suction air and simultaneously functions as the intake for cooling air. This multi-functionality eliminates the need for separate cooling openings in the housing, thereby maintaining seal tightness while ensuring adequate motor cooling.
3Temperature
If large flow cross sections are provided for cooling air, then motor cooling is improved, but device complexity increases
Solution Approach 1:
The patent utilizes existing structural spaces for cooling air flow rather than adding dedicated cooling channels. The motor compartment space and the suction mouth are repurposed to accommodate cooling air flow, eliminating the need for complex additional cooling channel structures while ensuring adequate cooling.
Solution Approach 2:
The cooling air flow path is merged with the existing suction air path components (motor compartment, suction mouth, cyclone separator). This integration allows the cooling function to utilize already-present structural elements, avoiding the need for separate complex cooling channel infrastructure.
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 significantly improves suction efficiency and energy efficiency, allowing the electric motor to handle high power consumption without overheating, while maintaining a tight seal to minimize leakage.
Implementation Method 1
the waste heat from the electric motor must be dissipated in order to avoid overheating and a malfunction caused thereby
Implementation Method 2
the negative suction pressure generated by a vacuum cleaner in order to direct a secondary air flow over the engine compartment of the electric motor for cooling
Implementation Method 3
the cooling air emerging from the air outlet opening during operation of the electric suction head reaches the suction mouth via at least one of the suction mouth edges
Data Source
Figure 1
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Figure 3
AI summary
The head (1) has a cleaning device (5) driven by an electric motor (4) positioned within a housing (2) in a motor chamber (3). A vacuum mouth on an underside of the housing is delimited by vacuum mouth edges, and a vacuum connector (12) is connected to the housing. The chamber has an air entry opening (11) for entry of air to cool the motor, and an air exit opening is positioned on the underside of the housing such that the cooling air that exits from the air exit opening during operation of the head enters into the vacuum mouth by way of one of the vacuum mouth edges.