High Pressure Cleaning Device Valve Control Logic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-pressure cleaning devices with existing bypass valves and hydraulically controlled tappets require significant operator force to open the ejection opening due to high pressure in the pressure line, leading to complex design and high wear on components.
Innovation Solution
Designing the high-pressure cleaning device such that the engine's operating state can only be adjusted when the valve is open, preventing high pressure from being exerted on the valve during state changes, allowing for lower pressure design and reduced wear, with electrical signal control for motor operation independent of pressure conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor is switched on while the valve is closed, then high pressure is exerted on the valve during pumping, but this causes high wear on the valve and requires significant force to open the valve
Solution Approach 1:
The control unit is programmed to require the valve to be in the open position before allowing the motor to be switched on. This preliminary action prevents high pressure from building up on the closed valve, eliminating the need for significant force to open it and reducing wear on valve components.
Solution Approach 2:
The patent replaces the traditional mechanical interlocking mechanism with an electronic control system. The control unit uses electrical signals to manage the sequence of operations, substituting mechanical complexity with electronic control to achieve the same protective function.
2Reliability
If a bypass valve and hydraulic tappet are used to control pressure, then the pump can be switched off, but high pressure remains in the pressure line requiring complex design and causing high wear
Solution Approach 1:
The patent extracts and eliminates the bypass valve and hydraulic tappet components from the system. Instead, it uses a simple electronic control mechanism where the motor can only be switched on when the valve is open, achieving pressure control without the complex hydraulic machinery.
Solution Approach 2:
The complex mechanical pressure control system (bypass valve, hydraulic tappet) is replaced with an electronic control system. The control unit uses electrical signals to manage motor operation based on valve position, substituting mechanical complexity with electronic simplicity.
3Productivity
If the valve is closed before the motor is switched off, then pressure builds up in the delivery line, but this causes high wear on components and requires significant force to open the valve
Solution Approach 1:
The control unit is programmed to require the valve to be in the open position before allowing the motor to be switched on. This preliminary action prevents high pressure from building up on the closed valve, eliminating the need for significant force to open it and reducing wear on valve components.
Solution Approach 2:
The control unit continuously monitors the valve position and uses this feedback to control when the motor can be switched on. This feedback mechanism ensures that the motor is only activated when the valve is open, preventing pressure buildup and reducing component wear.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a high-pressure cleaning device (1) comprising a connection (2) for a liquid source (14), a feed pump (3), a motor (4) for driving the feed pump (3), a delivery line (5) through which liquid can be conveyed from the connection (2) to a spray opening (6) of the delivery line (5) by means of the feed pump (3), and a valve (8) arranged in the delivery line (5). The motor (4) has two operating states. The two operating states comprise an off state and an on state. The valve (8) has two valve states, comprising a closed state (20) and an open state (40). In the closed state (20), the valve (8) prevents the flow of liquid through the delivery line (5). In the open state (40), the valve (8) allows the flow of liquid through the delivery line (5).The high-pressure cleaning device (1) is designed in such a way that the adjustment of the operating state of the motor (4) is only possible when the valve (8) is in the open state (40).