Dishwasher
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Solution Overview
Problem
Existing dishwasher designs limit the movement range of the cover panel, restricting space utilization and stable opening/closing of the door due to insufficient force and restricted movement caused by link structures.
Innovation Solution
A dishwasher with a link module comprising a first link, second link, and third link, where the first link moves from the rear to the front upper side of the door rotating shaft, increasing the cover panel's movement range, and a door bracket system that stabilizes the door's opening with a force opposite to the load, allowing for enhanced space utilization and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a link structure is used to move the panel when the door rotates, then the panel can be moved to reduce the space occupied in the lower side of the tub, but the movement range of the panel is restricted and the force acting on the panel is insufficient
Solution Approach 1:
The link structure is divided into multiple segments (first link, second link, third link) that can move relative to each other, allowing the panel to achieve greater movement range while maintaining compact space utilization when closed
Solution Approach 2:
The link structure transitions from a fixed rigid connection to a dynamic multi-segment mechanism that adapts its configuration during door rotation, enabling the panel to move through a larger arc while maintaining stability in both open and closed positions
2Force
If a link structure with certain radius is used to pull the panel upward, then the panel movement is achieved, but the force acting on the panel is relatively insufficient
Solution Approach 1:
The link mechanism utilizes curved motion paths and rotational joints that provide mechanical advantage, allowing the door's weight and gravity to contribute to pulling the panel upward rather than requiring additional active force
Solution Approach 2:
The link structure is designed to utilize the door's own weight as a counterbalance, where the rotational motion of the door creates gravitational force that assists in moving the panel upward, reducing the need for additional pulling force
3Length of moving object
If the link moves to the lower side of the front when the door rotates, then the panel can be moved, but the movement does not take into account the rotation range according to the opening of the door
Solution Approach 1:
The link mechanism is designed with dynamic geometry that changes its configuration based on the door's rotation angle, automatically adapting the panel's movement path and distance to match the door's opening range
Solution Approach 2:
The mechanism changes geometric parameters (link angles, connection positions) as the door rotates, allowing the panel movement to be proportional and adaptive to the door's rotation range rather than following a fixed path
Data Source
AI summary
A dishwasher includes a tub, a base in a lower side of the tub, a door, a cover panel that covers the door and the base, and a link module connected to the door and the cover panel and configured to move the cover panel in a length direction of the door. The link module includes a first link having a first link-bracket connection portion connected to the door and spaced apart from a door rotating shaft, a second link disposed in a rear of the first link and rotatably connected to the first link and the tub, and a third link disposed in front of the first link and rotatably connected to the first link and the cover panel. When the door is opened, the first link-bracket connection portion moves from a rear of the door rotating shaft to a front upper side of the door rotating shaft.