High-Pressure Cleaning Device Pressure Relief Valve
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Solution Overview
Problem
Existing high-pressure cleaning devices face difficulties in opening the liquid dispensing element after it has been closed, due to the high pressure in the liquid dispensing line, which requires significant force to overcome the pressure and reopen the valve.
Innovation Solution
The introduction of a pressure relief valve that opens a flow path from the pressure line downstream of the check valve to the suction line when the pressure exceeds a predetermined limit, reducing the pressure in the system and facilitating the reopening of the liquid dispensing element with minimal actuating force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the liquid dispensing device is closed to stop liquid dispensing, then the flow resistance increases and liquid dispensing stops, but the pressure in the pressure line increases significantly making it difficult to reopen the device
Solution Approach 1:
A bypass valve is introduced as an intermediary component that provides an alternative flow path from the pressure line to the suction line. When the liquid dispensing device is closed, the bypass valve opens automatically due to pressure differential, allowing cleaning fluid to circulate through the bypass line and preventing excessive pressure buildup in the pressure line, thereby facilitating easier reopening of the dispensing device.
Solution Approach 2:
The harmful high pressure in the pressure line is extracted or removed by diverting the cleaning fluid flow through the bypass valve and bypass line back to the suction line. This extraction of excess pressure prevents the problematic high-pressure state that makes reopening the liquid dispensing device difficult.
2Reliability
If the bypass valve is designed with automatic pressure-controlled actuation, then the pressure relief function is improved, but the device complexity increases
Solution Approach 1:
The bypass valve is designed to actuate automatically based on the pressure differential between the pressure line and suction line. The pressure differential itself serves as the actuating force, moving the bypass valve body between closed and open positions without requiring external control systems, sensors, or complex actuation mechanisms. This self-service approach improves reliability while minimizing device complexity.
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 allows for easier reopening of the liquid dispensing element by reducing the pressure in the system, thereby reducing the required actuating force and simplifying the structural complexity of the high-pressure cleaning device.
Implementation Method 1
the bypass valve body (48), in a closed position, seals against a bypass valve seat (49), and its position relative to the bypass valve seat (49) can be controlled by an actuator (45) depending on the pressure of the cleaning fluid prevailing in the pressure line (30)
Implementation Method 2
a check valve (34) is arranged in the pressure line (30)
Implementation Method 3
the pump has at least one pump chamber (18) into which a reciprocating piston (20) is immersed
Data Source
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AI summary
The invention relates to a high-pressure cleaning device (10) comprising a pump (14) which has a suction line (24) and a pressure line (30), said pressure line (30) being equipped with a nonreturn valve (34), and comprising an overflow valve (62) which is arranged in an overflow line (46) that connects the pressure line (30) upstream of the nonreturn valve (34) to the suction line (24) and which has an overflow valve element (64), the position of said valve element being controllable relative to a paired overflow valve seat (72) by means of an actuator (80) depending on the cleaning fluid pressure in the pressure line (30). The aim of the invention is to develop the high-pressure cleaning device (10) such that the opening process of a liquid dispensing element is simplified. According to the invention, this is achieved in that the high-pressure cleaning device (10) has a pressure relief valve (102), via which a flow path from the region of the pressure line (30) downstream of the nonreturn valve (34) to the suction line (24) can be released when a specified threshold pressure is exceeded.