Steam Generation Unit With Integrated Condensate Return
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Solution Overview
Problem
Existing steam generation units for household appliances are not compact and efficient, with separate condensate return systems that can lead to condensate flowing back into the evaporator, affecting steam quality and requiring additional components for level detection and adjustment.
Innovation Solution
A steam generation unit with a continuous-flow heater and integrated level detection unit that serves as both a condensate return, featuring a steam outlet channel merging into a larger steam channel to prevent condensate entrainment, with a flow cross-section ratio of at least 1.5:1, ensuring efficient steam introduction and condensate separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate condensate return system is used, then condensate can be returned to the water supply, but the device complexity increases and more components are required
Solution Approach 1:
The patent combines the level detection unit and condensate return channel into a single integrated structure. The level detection unit serves dual purposes: detecting water levels and returning condensate to the water supply through its integrated condensate return channel, eliminating the need for a separate condensate return system.
Solution Approach 2:
The level detection unit is designed to perform multiple functions simultaneously: it detects water levels in the continuous-flow heater and also serves as the condensate return pathway. This multi-functional design reduces the overall number of components while maintaining reliable condensate return functionality.
2Object-affected harmful factors
If the steam outlet channel has a small flow cross-section, then steam velocity is high preventing condensate entrainment, but the steam channel requires larger cross-section to reduce velocity and allow condensate separation
Solution Approach 1:
The steam transport system is divided into two distinct segments: a steam outlet channel with small flow cross-section for high-velocity steam transport that prevents condensate entrainment, and a steam channel with larger flow cross-section where velocity is reduced to allow condensate separation. This segmentation allows each segment to optimize for its specific function.
Solution Approach 2:
The patent transitions from a single-dimension steam channel to a two-stage system with changing cross-sectional dimensions. The steam outlet channel uses small dimensions for high velocity, while the steam channel uses larger dimensions for low velocity and condensate separation, utilizing dimensional changes to control flow characteristics.
3Reliability
If a separate condensate return system is implemented, then condensate can be managed, but the overall unit size increases reducing compactness
Solution Approach 1:
The condensate return function is merged with the level detection unit, allowing condensate to be returned to the water supply through the same structure used for level detection. This integration eliminates the need for additional separate condensate return components, maintaining reliable condensate management while minimizing unit size.
4Reliability
If multiple separate components are used for level detection and condensate return, then each function can be optimized, but the number of parts increases leading to more wear and defects
Solution Approach 1:
The level detection unit is designed as a multi-functional component that simultaneously performs level detection and condensate return. By making this single component universal, the patent reduces the total number of parts, minimizing potential wear points and defect sources while maintaining both functions' effectiveness.
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 configuration results in a compact design that maintains accurate filling levels, prevents condensate from entering the evaporator, and ensures high-quality steam with minimal water droplets, while eliminating the need for a separate condensate return system and reducing wear and defects.
Implementation Method 1
By means of the evaporator, water fed to it is typically converted into water vapor
Implementation Method 2
water fed to it is typically converted into water vapor
Implementation Method 3
level detection unit which is fluidically connected in parallel with the continuous-flow heater
Implementation Method 4
steam outlet channel merging into a larger steam channel to prevent condensate entrainment, with a flow cross-section ratio of at least 1.5:1
Implementation Method 5
ensures efficient steam introduction and condensate separation
Implementation Method 6
prevents condensate from entering the evaporator
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The steam generation unit (1) has an evaporator (3), particularly instantaneous water heater, a level detection unit (7), which is switched parallel to the evaporator and a condensate reflux. The condensate reflux is integrated to the level detection unit. An independent claim is also included for a method for producing water vapor for equipment.