Shower Device Dual Flow Path Pressure Compensation
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Solution Overview
Problem
Conventional shower devices with multiple flow modes lack the ability to maintain regulated water flow across different pressure systems and often require larger components to accommodate high flow rates, leading to inefficiencies and potential accidental activation in high flow modes.
Innovation Solution
A shower device with a primary flow path and a supplemental flow path, regulated by pressure compensating devices, allows for a low flow mode and a high flow mode by opening the supplemental path with a user-actuated button, ensuring efficient water use and preventing accidental high flow activation through design features like a flush or recessed button.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a shower device provides multiple flow modes including high flow mode, then the showering performance and versatility are improved, but the device complexity and risk of accidental activation increase
Solution Approach 1:
The shower device is segmented into a main body and a removable handheld showerhead assembly. The flow mode selection mechanism is integrated into the handheld assembly, allowing it to be separated from the main body. This segmentation reduces the complexity of the main device while maintaining multiple flow modes in the handheld unit, and prevents accidental activation by requiring deliberate user action to engage high flow mode.
Solution Approach 2:
A mode selector mechanism acts as an intermediary between the user and the flow control system. This intermediary component requires deliberate user interaction (rotating or pressing) to switch between flow modes, preventing accidental activation while maintaining versatility. The mode selector is integrated into the handheld showerhead assembly, keeping the control mechanism separate from the main device.
2Productivity
If conventional shower devices are designed to accommodate high flow rates, then high flow mode capability is achieved, but the component size increases
Solution Approach 1:
The shower device employs dynamic flow control where the flow path and cross-sectional area can change based on the selected mode. In low flow mode, the device uses a restricted flow path with smaller effective cross-section. When high flow mode is activated, the flow path is dynamically opened to accommodate larger flow rates. This dynamic adaptation allows the device to provide high flow capability when needed while maintaining a compact size for normal operation.
Solution Approach 2:
The device changes flow parameters (flow rate, pressure, cross-sectional area) based on the selected mode. The flow control mechanism adjusts the effective flow area and resistance to match the desired flow rate. This parameter adjustment allows the same physical components to accommodate both low and high flow rates without requiring oversized components designed for maximum flow capacity.
3Measurement precision
If pressure compensating devices are added to regulate flow, then flow regulation accuracy is improved, but the device complexity increases
Solution Approach 1:
The pressure compensating function is merged with the flow control valve mechanism. The same component that regulates flow rate also compensates for pressure variations, eliminating the need for separate pressure compensation devices. This integration maintains flow regulation accuracy while reducing overall device complexity compared to having separate pressure compensation and flow control mechanisms.
Solution Approach 2:
The flow control mechanism is designed to automatically compensate for pressure variations without requiring external control systems. The valve design incorporates pressure-compensating features that self-regulate the flow rate based on incoming water pressure, maintaining consistent flow rates across different pressure conditions without adding complex control electronics or additional active components.
4Adaptability or versatility
If a supplemental flow path is added for high flow mode, then flow rate versatility is improved, but the device complexity and potential for accidental activation increase
Solution Approach 1:
The mode selector is designed to require deliberate preliminary action (rotation or pressing) before the supplemental flow path can be activated. This preliminary action serves as a confirmation step that prevents accidental activation. The supplemental flow path remains closed by default and only opens when the user has intentionally engaged the high flow mode through the mode selector mechanism.
Solution Approach 2:
The supplemental flow path control mechanism is nested within the handheld showerhead assembly, with the mode selector integrated into the handle. The supplemental flow path is hierarchically controlled - it requires activation of the mode selector, which is itself integrated into the removable handheld assembly that must be attached to the main device. This nested structure creates multiple levels of protection against accidental activation.
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 device provides a water-saving low flow mode with a momentary high flow option, suitable for various showering tasks, while maintaining regulated flow rates in both pressurized and gravity-fed systems, reducing component size and preventing unintended high flow usage.
Implementation Method 1
the flexible membrane flexing between a first position, in which the supplemental flow path is closed, and a second position, in which the supplemental flow path is open
Implementation Method 2
A valve may be positioned in the supplemental flow path and configured to be normally closed by a pressure of the second portion of the water flow
Data Source
AI summary
A shower device, such as a hand shower, includes a housing having an inlet and an outlet, the housing defining a first flow path and a second flow path between the inlet and the outlet, a first flow regulator positioned in the first flow path and limiting a flow of water therethrough to a first flow rate, and a second flow regulator upstream of the first flow regulator and limiting a flow of water therethrough to a second flow rate, the first flow path and the second flow path passing through the second flow regulator. A valve may be positioned in the second flow path and biased to close the second flow path and an actuator may be coupled to the valve and operable to open the valve, the actuator being positioned on the housing flush with or recessed from the housing surface.