Filter Head Bypass Channel for Leak-Free Exchange
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Solution Overview
Problem
Existing filter heads require the entirety of water to pass through the filter, leading to shortened filter life span and increased maintenance costs, and users face inconvenience during filter exchange due to the need for selective flow control and potential water leaks.
Innovation Solution
A filter head design with an inflow and outflow passage system that includes a bypass flow channel, allowing a partial flow to bypass the filter, and first and second opening and closing units that adjust to control fluid flow, preventing leaks during filter exchange and extending filter life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entirety of water is supplied to the filter, then water quality standards are met, but the life span of the filter is shortened
Solution Approach 1:
The water flow is segmented into two separate paths: a first path through the filter and a second path bypassing the filter. This segmentation allows selective filtration of only the necessary portion of water, reducing the total volume passing through the filter while still meeting water quality requirements.
Solution Approach 2:
A flow control valve is introduced as an intermediary device to regulate and divide the water flow between the filtration path and the bypass path. This valve acts as a mediator that enables dynamic control over the proportion of water filtered, optimizing both water quality and filter longevity.
2Ease of operation
If a selective flow control unit is installed in the head, then raw water can be controlled during filter exchange, but unit cost and fabrication process are increased
Solution Approach 1:
The flow control valve is designed to be automatically actuated by the insertion or removal of the filter cartridge itself. When the filter is inserted, it automatically closes the bypass; when removed, the bypass opens. This self-service mechanism eliminates the need for separate manual control operations during filter exchange.
Solution Approach 2:
The flow control function is merged with the filter cartridge installation process. The act of inserting or removing the filter directly controls the flow path selection, combining two functions (filter replacement and flow control) into a single operational action.
3Ease of operation
If an opening and closing rotation member is provided, then raw water introduction can be controlled, but user inconvenience increases and the member may be abraded causing water leak
Solution Approach 1:
The complex rotational mechanical control system is replaced with a simpler linear push-button mechanism. The push button directly actuates the flow control valve without requiring rotation or complex mechanical linkages, reducing wear and improving reliability.
Solution Approach 2:
The push button is designed as a simple, low-cost component that can be easily replaced if needed. Its simple structure minimizes wear points and potential failure modes compared to complex rotational mechanisms with multiple moving parts.
4Reliability
If the guide passage is blocked during filter exchange, then water leak is prevented, but user convenience is reduced
Solution Approach 1:
The flow control valve automatically performs the function of blocking the guide passage during filter exchange without requiring user intervention. The system self-regulates the flow path based on the presence or absence of the filter cartridge.
Solution Approach 2:
The flow control valve is positioned and configured to automatically close the bypass path before the filter is fully inserted, and open it after removal. This preliminary action prevents potential leaks without requiring users to manually block passages during the exchange process.
Data Source
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AI summary
The filter head having a filter head main body includes: an inflow passage communicating with an inflow portion; an outflow passage communicating with an outflow portion; a filter introduction hole communicating with the inflow passage, to which an introduction portion of a filter is connected when the filter is mounted; a filter discharge hole communicating with the outflow passage, to which a discharge portion of the filter is connected when the filter is mounted; and a bypass flow channel connecting the inflow passage and the outflow passage and allowing the remaining flow of the fluid introduced through the inflow portion to pass therethrough so as to be expelled together with the fluid which has passed through the filter, through the outflow portion.