Dishwasher Pump Heating Tube Layout for Compact Leak-Resistant Flow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional dishwasher pumps have a vertical pressure connection that increases radial dimensions, requiring more installation space and reducing usable volume, and their small heating surfaces lead to premature aging and leaks due to high heat output.
Innovation Solution
The pressure port is arranged in the housing cover, allowing for a compact design with a tubular heating device and reduced external dimensions, using a metal tube for efficient heat transfer and a plastic housing for cost-effectiveness and reduced weight, with the suction and pressure connections optimized for uniform heating and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pressure connection is arranged vertically protruding from the pump housing, then the connection is structurally simple, but the radial dimensions of the pump increase and installation space is consumed
Solution Approach 1:
The pressure connection is repositioned from a vertical arrangement to a horizontal arrangement within the housing cover plane, changing the spatial dimension of connection orientation. This allows the pressure port to be integrated into the cover structure without protruding radially, thereby reducing the pump's external dimensions while maintaining connection functionality
2Volume of moving object
If a ring-shaped heating device with perforations is used, then the heating surface is compact, but the heating surface area is reduced and production complexity increases
Solution Approach 1:
Instead of using a perforated ring structure that reduces heating surface area, the invention inverts the approach by using a closed tubular structure without perforations. The heating element is positioned externally to heat the liquid as it flows through the tube, eliminating the need for perforations and maximizing the heating surface area while simplifying production
3Loss of time
If high heat output is used to heat rinsing liquid quickly, then heating time is reduced, but premature aging and leaks occur due to high temperatures
Solution Approach 1:
The heating system uses a high-efficiency heat exchanger with large surface area to increase the heat transfer coefficient, allowing effective heating at lower temperature differentials. This changes the thermal parameters from high-temperature rapid heating to efficient heat transfer at controlled temperatures, preventing material degradation while maintaining quick heating performance
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 design reduces installation space, increases usable dishwasher volume, ensures efficient and uniform heating with minimal energy loss, and prevents leaks by using a tubular heating device with a metal tube and plastic housing, while maintaining a compact and cost-effective structure.
Implementation Method 1
The tube of the heating device is made of metal because it transmits a maximum of the heating energy to the rinsing liquid due to its good thermal conductivity.
Implementation Method 2
Plastic is also a poor conductor of heat, so that the heated rinsing liquid can be transported in the pump with almost no loss of energy.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Proposed is a pump (10, 110), in particular for dishwashers, with a housing consisting of a housing base (28, 128), a housing cover (16, 116) and a heating device (30, 130, 36, 136) arranged between them for heating a Flushing liquid, which forms an annular side wall (30, 130) of the housing, with an impeller (40, 140) arranged in the housing, with a suction connection ( 18, 118), and with a pressure connection (20, 120), the pressure connection (20, 120) being arranged in the housing cover (16, 116), the heating device (30, 130, 36, 136) having a tube (30, 130) with a closed circular cross-section.