Pump and dishwasher including the same
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Solution Overview
Problem
Conventional dishwashers face issues with heater overheating, reduced heat exchange efficiency, and corrosion due to direct contact with wash water, and require water level control to prevent these problems, while also consuming excess water for heating and steam generation.
Innovation Solution
A pump with a partitioned body, a detachable heater, and a steam discharge port that allows for efficient heat exchange and water circulation, minimizing water usage and preventing heater overheating by separating the heater from direct contact with wash water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the heater is exposed in the sump to heat wash water, then heat exchange efficiency is improved, but the heater overheats and durability is reduced
Solution Approach 1:
The patent introduces a water level control mechanism that acts as an intermediary between the heater and the wash water. The control mechanism maintains an optimal water level that ensures sufficient heat exchange while preventing the heater from being completely exposed, thus balancing heat exchange efficiency with heater durability and preventing overheating.
2Temperature
If the heater contacts wash water for heating, then hot water generation is achieved, but foreign matter attaches to the heater surface reducing efficiency
Solution Approach 1:
The water level control mechanism serves as an intermediary that maintains a protective layer of wash water over the heater surface. This controlled contact allows necessary heat exchange for hot water generation while preventing excessive foreign matter accumulation that would reduce heater efficiency over time.
Solution Approach 2:
The system utilizes the wash water itself to protect the heater. By maintaining an appropriate water level, the wash water continuously flows over the heater surface, creating a self-cleaning effect that prevents excessive foreign matter attachment and maintains heater efficiency.
3Reliability
If water level is controlled to prevent heater overheating, then heater reliability is improved, but device complexity increases
Solution Approach 1:
The water level control mechanism is designed to operate automatically using the existing wash water in the sump. The system leverages the natural presence and movement of wash water to maintain appropriate levels, eliminating the need for complex external control systems while ensuring heater reliability.
4Use of energy by moving object
If excess wash water is supplied for hot water and steam generation, then heating efficiency is improved, but water consumption increases
Solution Approach 1:
The water level control mechanism incorporates feedback from the actual water level in the sump to regulate water supply. This feedback system ensures that only the necessary amount of wash water is supplied for effective heating and steam generation, preventing excessive water consumption while maintaining heating efficiency.
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 pump simultaneously heats and circulates wash water, maintains heater efficiency and durability, and reduces water consumption for hot water and steam generation without requiring water level control, enhancing the dishwasher's performance.
Implementation Method 1
a heater configured to heat the housing
Implementation Method 2
a steam discharge port formed through the first chamber to allow steam to be discharged therethrough
Data Source
AI summary
A pump (8) is disclosed. The pump (8) includes a partition wall (84) configured to divide the interior of a body into two spaces, a first chamber (C1) located under the partition wall (84), the first chamber (C1) having an introduction portion (841), through which water is introduced, a second chamber (C2) located above the partition wall (84), the second chamber (C2) having a discharge portion (849), through which water is discharged, a communication hole (86) formed through the partition wall (84) to allow the first chamber (C1) and the second chamber (C2) to communicate with each other therethrough, an impeller (85) provided in the second chamber (C2) to move water to the discharge portion (849), a housing configured to define the bottom surface of the first chamber (C1), the housing being made of a conductor, a heater (H) configured to heat the housing (81), and a steam discharge (843) port formed through the first chamber (C1) to allow steam to be discharged therethrough.