Dispensing Conduit Drain Line for Residual Liquid Removal
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Solution Overview
Problem
Existing household liquid dispensing systems face issues with the recirculation of residual mixed liquid, which leads to inefficiencies in heating and cooling, and creates a leaky impression due to unintended discharge of relatively hot water through the dispensing opening.
Innovation Solution
A household appliance with separate hot and chilled water systems, a dedicated drain line for residual liquid, and a control unit for precise temperature control and flushing, allowing for efficient mixing and dispensing of liquids without recirculation, thereby preventing unwanted discharge and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If residual liquid is recirculated back to the boiler, then water supply is maintained, but energy is wasted due to reheating cooled water and the system becomes complex requiring pipe interrupters
Solution Approach 1:
The patent extracts the problematic recirculation function from the system by introducing a drain line that completely removes residual liquid from the outlet pipe rather than recirculating it. This eliminates the energy waste of reheating cooled water while maintaining water supply continuity through proper drainage and refilling mechanisms.
2Ease of manufacture
If a pipe interrupter is installed to prevent backflow, then water can be drained through the dispensing opening, but the system becomes complex and requires specific interrupter placement
Solution Approach 1:
The patent removes the pipe interrupter component entirely by using a drain line that branches off from the outlet pipe and directs residual liquid to a drain. This simplifies the system while maintaining the capability to drain residual liquid without requiring complex interrupter mechanisms or specific placement constraints.
3Productivity
If residual water is allowed to drain through the dispensing opening, then the pipe is cleared, but hot water leaks causing poor user impression and potential burns
Solution Approach 1:
The patent extracts the drainage function from the dispensing opening by providing a separate drain line that branches off from the outlet pipe. This separates the pipe clearing function from the water dispensing function, allowing residual liquid to be drained safely without leaking hot water through the dispensing opening, thus eliminating the harmful effect while maintaining clearing efficiency.
4Temperature
If a separate hot water system is used, then temperature control is improved, but the system becomes more complex with separate piping
Solution Approach 1:
The patent segments the water supply system into separate hot and cold water lines that converge at the mixing valve, allowing independent temperature control of each line. This segmentation enables precise temperature control while managing complexity through modular, independent piping sections rather than a completely integrated system.
Data Source
AI summary
The invention relates to a household appliance (1) for dispensing liquid, comprising a dispensing unit (2) for dispensing the liquid, which is a sanitary fitting, a connection device (4) for connecting the household appliance (1) to an external water network (5), and at least one water temperature control system (9) separate from the connection device (4), with which water supplied from the external water network (5) to the water temperature control system (9) can be tempered, wherein the water temperature control system (9) comprises a line unit (17, 27) with which the water temperature control system (9) is connected to the dispensing unit (2), and a line device (6) separate from the line unit (17, 27) with which the water from the external water network (5) can be conveyed directly from the connection device (4) to the dispensing unit (2).wherein the water temperature control system (9) opens into a line (10) of the dispensing unit (2) arranged for conveying tempered water from the water temperature control system (9) containing a liquid, and a separate drain line (29) branches off from the line (10) for draining the remaining liquid remaining in the line (10) after a dispensing process of the liquid.