A dishwasher with improved washing effectiveness
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Solution Overview
Problem
Existing dishwashers with additional spray arms struggle to efficiently wash extensively dirty dishes due to complex structures that increase production costs and reduce effectiveness.
Innovation Solution
A dishwasher design featuring an additional spray arm that rotates under the main spray arm, utilizing water pressure to sweep a region of the rack effectively, with a transfer means and headpiece that rotate to distribute water efficiently, and a valve system to alternate water supply between the main and additional spray arms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional spray arms are added to spray extra water to dirty regions, then washing effectiveness is improved, but device complexity and production costs increase
Solution Approach 1:
The additional spray arm is designed to rotate dynamically under the influence of water pressure rather than being stationary. The water pressure automatically drives the spray arm to rotate and sweep across dirty regions, providing adaptive washing coverage without complex mechanical actuators or control systems.
Solution Approach 2:
The additional spray arm utilizes the water pressure from the washing system itself to power its rotation and sweeping motion. The water flow that would otherwise be wasted directly drives the spray arm's movement, eliminating the need for separate power sources or complex control mechanisms.
2Area of stationary object
If additional spray arms with complex structures are used to target dirty regions, then washing coverage is improved, but production costs increase
Solution Approach 1:
The spray arm rotates dynamically under water pressure to cover a larger area rather than being fixed in one position. This dynamic movement expands the effective washing coverage without requiring multiple complex stationary spray arms.
Solution Approach 2:
The invention extracts and utilizes the existing water pressure from the washing system to power the additional spray arm's rotation, rather than adding complex mechanical drive systems. This simplifies the structure and reduces manufacturing costs.
3Reliability
If additional spray arms are installed to improve washing of dirty regions, then washing effectiveness is improved, but the spray arms cannot efficiently target the region
Solution Approach 1:
The additional spray arm rotates dynamically under water pressure to actively sweep across dirty regions rather than spraying from a fixed position. This dynamic movement allows the spray arm to efficiently cover and target multiple dirty areas sequentially.
Solution Approach 2:
The invention uses hydraulic pressure from the water supply to directly drive the rotation and sweeping motion of the spray arm. The water pressure itself becomes the driving force, enabling efficient and automatic targeting of dirty regions without mechanical actuators.
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 additional spray arm enhances washing effectiveness by ensuring more water is sprayed to dirty regions, improving cleaning efficiency while maintaining cost-effectiveness.
Implementation Method 1
an additional spray arm that is disposed under the spray arm, that extends almost parallel to the base plane, that can rotate around its axis for a limited distance as a result of the pressure of the water pumped thereinto
Implementation Method 2
By means of the hole spraying water to the left side of the additional spray arm, the transfer means rotates towards the right in accordance with the action-reaction principle
Data Source
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AI summary
The present invention relates to a dishwasher (1) comprising a tub (2) having a base (3), a rear wall (4) and two side walls (5) surrounding the base (3); a door (6) providing access to the tub (2), connected to the tub (2) from its lower side and opening by tilting forward; a rack (7) having a washing position wherein it is placed on the base (3) so as to entirely remain inside the tub (2) and a loading position wherein it is positioned on the inner surface of the door (6) by being moved forward when the door (6) is open and wherein loading-unloading can be performed; and a spray arm (8) that extends from the base (3) into the tub (2), that remains under the rack (7) when the rack (7) is in the washing position and that sprays water into the rack (7) by rotating around itself.