Water-Cooled Brushless Motor Pump Assembly Heat Dissipation
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Solution Overview
Problem
Current hand-held pressure washers with air-cooled brush motors face safety and performance issues due to low waterproofing, inefficiency, excessive heat, and poor cooling, while their transmission systems suffer from poor lubrication, noise, and heat generation, failing to meet user performance needs.
Innovation Solution
A pump assembly with a heat dissipating portion that uses a water flow passage and metal heat dissipating ribs to transfer heat away from the motor and transmission assembly, enhancing cooling and waterproofing through a sealed structure and efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air-cooled brush motor is used, then the motor structure is simple and cost is low, but the waterproof level is low and safety regulation can't be met
Solution Approach 1:
The patent replaces the traditional air-cooled brush motor with a water-cooled brushless motor. This substitution achieves IPX5 waterproof rating by using a sealed motor structure with water cooling channels, eliminating the need for air intake openings while effectively dissipating heat through water circulation.
Solution Approach 2:
The patent introduces a water cooling system with water inlet and outlet channels integrated into the motor structure. Water flows through these channels to absorb and carry away heat generated by the motor, achieving both cooling and waterproofing functions simultaneously.
2Use of energy by moving object
If air-cooled brush motor is used, then the motor efficiency is low, but the structure is simpler
Solution Approach 1:
The patent replaces the air-cooled brush motor with a water-cooled brushless motor. The brushless motor design eliminates mechanical brushes and commutators, reducing energy loss and improving efficiency. The water cooling system provides superior heat dissipation compared to air cooling, further enhancing motor efficiency and performance.
3Reliability
If grease lubrication is used in transmission system, then the structure is simple, but the lubrication is poor and noise is high
Solution Approach 1:
The patent replaces grease lubrication with water lubrication in the transmission system. Water is introduced into the transmission cavity where it provides effective lubrication for the planetary gears and other moving parts. This hydraulic lubrication approach reduces friction and wear while significantly lowering operating noise compared to traditional grease lubrication.
Solution Approach 2:
The water introduced into the system serves multiple functions: it provides cooling for the motor and transmission, provides lubrication for the transmission components, and acts as a cleaning agent. This multi-functional use of water simplifies the overall system while improving performance.
4Temperature
If grease lubrication is used in transmission system, then the structure is simple, but heat generation is high
Solution Approach 1:
The patent implements a water cooling system where water flows through channels in the transmission housing and directly contacts the planetary gears and other heat-generating components. This hydraulic cooling approach efficiently absorbs and removes heat from the transmission system, maintaining lower operating temperatures compared to air cooling or grease lubrication.
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 dissipates heat generated by the transmission structure, improving the pump assembly's performance, meeting safety and performance requirements, and extending the service life of the high-pressure cleaning apparatus.
Implementation Method 1
a heat dissipating portion connected to the sealing portion for transferring heat with the sealing portion
Implementation Method 2
The heat dissipating portion has a water inlet and a water outlet both for water passing to dissipate heat generated by the transmission mechanism
Implementation Method 3
a plurality of metal heat dissipating ribs are disposed in the water passage
Implementation Method 4
metal heat dissipating ribs are uniformly distributed in the water passage
Implementation Method 5
the motor has a motor water passage for water passing to dissipate heat
Data Source
AI summary
The invention provides a pump assembly and high-pressure cleaning apparatus. The pump assembly comprises a motor, a transmission assembly driven by the motor, a water pump connected with the transmission assembly, and a water flow passage. The transmission assembly comprises a sealing portion, a heat dissipating portion capable of dissipating heat to the sealing portion, and a transmission structure arranged in the sealing portion. A lubricating medium is injected in the sealing portion, and the heat dissipating portion is in fluid communication with the water flow passage. The pump body is provided with a heat dissipating portion capable of dissipating heat to the sealing portion, so that the heat generated by the transmission structure in the sealing portion can be dissipated through flowing-out of water in the heat dissipating portion to achieve a heat dissipating effect of the pump assembly.