Motor-Pump Unit Cooling Integration via Suction Inlet
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor-pump units for high-pressure cleaning appliances require costly connecting lines and fittings to establish a flow connection between the cooling housing and the suction inlet, complicating the cooling and operation of the electric motor.
Innovation Solution
A compact connecting device is introduced, positioned laterally alongside the pump, with releasable connections to the cooling housing inflow and outflow, allowing for easy channeling of liquid through a cavity to the suction inlet, enabling both air and liquid cooling of the electric motor without the need for additional modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If costly connecting lines and fittings are used to establish flow connection between cooling housing and suction inlet, then reliable cooling of electric motor is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the cooling liquid flow path with the suction liquid flow path by integrating the cooling housing outflow directly into the suction inlet structure. The cooling housing outflow serves dual purposes: as an exit for cooling liquid and as part of the suction inlet for process liquid, eliminating the need for separate connecting lines and fittings between these components.
Solution Approach 2:
The cooling housing outflow is designed to perform multiple functions: it serves as the outlet for cooling liquid from the motor cooling cavity and simultaneously as part of the suction inlet for the process liquid being pumped. This multi-functionality reduces the number of separate components needed in the system.
2Temperature
If cooling liquid is fed through cavity between motor housing and cooling housing, then electric motor cooling efficiency is improved, but additional connecting lines and fittings are required
Solution Approach 1:
The patent combines the cooling liquid delivery system with the pump housing structure. The cooling housing is integrated into the pump assembly, and the cooling liquid flow path is merged with the suction inlet structure, eliminating the need for external connecting lines and fittings while maintaining effective motor cooling.
3Device complexity
If compact connecting device is used laterally alongside pump, then device complexity is reduced, but connection reliability may be compromised
Solution Approach 1:
The patent merges the cooling housing outflow directly into the suction inlet structure, creating an integrated flow path. This integration eliminates separate connecting devices while maintaining connection reliability, as the cooling liquid and suction liquid paths are unified within the pump housing structure rather than connected through external fittings.
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 solution simplifies the cooling process, reduces production costs and weight, and allows for straightforward operation of the motor-pump unit by eliminating the need for complex connecting lines, while maintaining efficient heat dissipation and pressure delivery.
Implementation Method 1
a cooling liquid can be fed to the cavity between the motor housing and the cooling housing
Implementation Method 2
a liquid, preferably water, can be fed to a pumping chamber via the suction inlet, subjected to pressure and then discharged via the pressure outlet
Data Source
AI summary
The invention relates to a motor-pump unit having an electric motor and a pump, the pump having a suction inlet and a pressure outlet, and the electric motor comprising a motor housing which is enclosed by a cooling housing, whereby a cavity is formed, it being possible for cooling liquid to be fed to the cavity via a cooling-housing inflow and to be conducted away therefrom via a cooling-housing outflow, and the cooling-housing outflow being in flow connection with the suction inlet. In order to develop the motor-pump unit such that, if required, a flow connection can easily be made from the cooling-housing inflow to the suction inlet via the cavity and the cooling-housing outflow, it is proposed that the motor-pump unit has a connecting device which is disposed laterally alongside the pump and has a first connection, which is connected in a releasable manner to the cooling-housing inflow via a first flow channel, and a second connection, which is connected in a releasable manner to the cooling-housing outflow via a second flow channel and is connected to the suction inlet.