Dual-Impeller Water Pump Layout Without a Shunt Valve
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Solution Overview
Problem
Intelligent toilet water pumps with a shunt valve have complex structures, high production costs, and require additional detection devices for diversion, leading to increased maintenance and production costs.
Innovation Solution
A one-inlet and two-outlet water pump design featuring two impellers with opposite rotation directions and two outlets, eliminating the need for a shunt valve by directly pressurizing liquid through the impellers for diversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a shunt valve is used to divert water flow to different flushing paths, then the flushing system can control flow rate and duration, but the structure becomes complex with many internal components and high production costs
Solution Approach 1:
The invention extracts and removes the shunt valve from the system entirely. Instead of using a valve to divert water, the pump itself is designed with two separate outlets that directly connect to the different flushing paths. This eliminates the need for internal valve components and their associated complexity while maintaining the ability to control flow to different paths.
Solution Approach 2:
The pump is segmented into two separate pumping circuits within a single pump body. Each circuit has its own outlet and can independently control flow to different flushing paths. This segmentation allows flow control without requiring a complex shunt valve, as each outlet can be controlled separately by its own impeller.
2Adaptability or versatility
If a shunt valve with complex internal path is used for water diversion, then flow routing is achieved, but local loss increases and requires higher pump lift
Solution Approach 1:
The invention removes the shunt valve and its complex internal flow paths from the system. By using direct outlets from the pump body, the water flow follows simpler, more direct paths to the flushing paths, minimizing local losses and energy dissipation that would occur in valve internal passages.
3Extent of automation
If a shunt valve with detection device is used to detect valve spool position, then diversion control is achieved, but production and maintenance costs increase
Solution Approach 1:
The invention removes the shunt valve and its detection device from the system. With the valve eliminated, the need for detecting valve spool position disappears entirely. The two-outlet pump design provides inherent flow control capability without requiring additional sensors or detection mechanisms, thereby reducing production and maintenance costs.
4Device complexity
If a single impeller pump is used, then the pump structure is simple, but it cannot meet the different flow rate and lift demands of two flushing paths
Solution Approach 1:
The pump is segmented into two independent pumping circuits, each with its own impeller (first impeller and second impeller). Each impeller can be independently controlled to meet the specific flow rate and lift requirements of different flushing paths. This segmentation provides the necessary adaptability while keeping each individual circuit relatively simple.
Solution Approach 2:
The pump body is designed to perform multiple functions simultaneously - it can pump water to different flushing paths with different requirements through its two outlets. The dual-impeller design allows the single pump unit to adapt to varying flow rate and lift demands of different flushing paths, providing multi-functionality.
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
Reduces production and maintenance costs by simplifying the structure and eliminating the need for a shunt valve, while meeting the flow rate and lift demands of both flushing paths in intelligent toilets.
Implementation Method 1
the motor assembly, in response to being excited, drives the impeller assembly to rotate, causing the liquid to flow into the hollow cavity from the inlet, and flow out of the first outlet and the second outlet after being pressurized by the first impeller and the second impeller
Data Source
AI summary
This application discloses a one-inlet and two-outlet water pump which comprises a pump body, and an impeller assembly and a motor assembly set inside the pump body. The motor assembly is connected to the impeller assembly. The impeller assembly comprises the first impeller and the second impeller connected to each other, with a hollow cavity formed between the first impeller and the second impeller. The design rotation direction of the first impeller blade is opposite to that of the second impeller blade. An inlet is set at one end of the pump body, corresponding to one end of the first impeller away from the second impeller. A first outlet and a second outlet are set on a side wall of the pump body, with the first outlet and the second outlet offset by a certain angle along a circumferential direction.