Dishwasher Belt-Driven Vane Assembly for Linear Spray Coverage
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Solution Overview
Problem
Conventional dish washing machines with rotary spray nozzles leave uncovered areas due to the radial spray pattern, while linear-type spray structures face challenges in assembly, cost reduction, and reliability, particularly in the drive unit design for the vane mechanism.
Innovation Solution
A dish washing machine with a linear-type spray structure featuring a vane driving unit that includes a motor, belt, and rail system for efficient movement of the vane to reflect wash water, utilizing a belt holder and pulley system with tension control to ensure reliable operation and ease of assembly, and a sealing mechanism to prevent water leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rotary spray nozzle is used, then the spray structure is simple, but there are uncovered areas due to radial spray pattern
Solution Approach 1:
The patent converts the static rotary nozzle into a dynamic linear reciprocating nozzle system. The nozzle moves back and forth in a straight line while spraying, transforming the radial spray pattern into a linear scanning pattern that covers the entire washing tub area, thereby solving the coverage limitation without complicating the spray structure itself.
Solution Approach 2:
The patent transitions from a two-dimensional radial spray pattern (rotary nozzle) to a three-dimensional coverage by adding linear reciprocating motion. The nozzle travels along a guide rail in one dimension while maintaining spray in another, creating comprehensive coverage through dimensional expansion of the spray path.
2Area of stationary object
If a linear-type spray structure with fixed nozzle and movable vane is used, then washing coverage is improved, but assembly complexity and cost increase
Solution Approach 1:
The patent extracts the drive mechanism from the main body structure and integrates it into the vane assembly itself. The motor and drive components are mounted on the vane, allowing the vane to drive its own movement along the guide rail, thereby simplifying overall assembly and reducing the number of separate drive components needed in the main structure.
Solution Approach 2:
The vane assembly is designed to perform multiple functions: it reflects spray water onto dishes, stores the drive motor and transmission components, and provides its own propulsion mechanism. This multi-functionality reduces the need for separate dedicated drive structures, simplifying assembly and reducing component count.
3Loss of energy
If the outlet of the distribution device faces upward, then pressure loss is minimized for rotary nozzles, but assembly flexibility is reduced for fixed nozzles
Solution Approach 1:
The patent makes the outlet orientation dynamic by mounting the distribution device outlet on the movable vane. As the vane reciprocates along the guide rail, the outlet orientation changes dynamically, allowing the system to adapt to different positions and maintain optimal spray angles without being constrained by a fixed upward-facing outlet configuration.
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 solution ensures comprehensive coverage of the washing tub, reduces assembly and maintenance costs, and enhances the reliability of the dish washing machine by maintaining consistent belt tension and preventing water leakage, thus improving washing efficiency.
Implementation Method 1
a belt connected to a drive pulley and an idle pulley to transfer the driving force of the motor to the vane
Implementation Method 2
the rear holder being coupled to one end of the rail by tension of the belt, and a front holder to rotatably support idle pulley, the front holder being coupled to the other end of the rail by the tension of the belt
Implementation Method 3
a vane to move within the washing tub and reflect the wash water sprayed from the fixed nozzle toward dishes
Data Source
AI summary
A dish washing machine including a drive unit to drive a vane. The drive unit includes a motor to generate driving force, a belt connected to a drive pulley and an idle pulley to transfer the driving force of the motor to the vane the motor, a rail to guide movement of the vane, a rear holder to rotatably support the drive pulley, the rear holder being coupled to one end of the rail by tension of the belt, and a front holder to rotatably support idle pulley, the front holder being coupled to the other end of the rail by the tension of the belt.