Method for controlling washing machine
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing washing machine control methods fail to accurately control the spray time of direct water nozzles in conjunction with the rotation speed of the circulation pump, leading to inconsistent spray patterns when both circulation and direct water nozzles are used simultaneously.
Innovation Solution
A method that involves controlling the rotation speed of the pump during drum rotation to synchronize the spray time of the direct water nozzle with the rotation speed, using a spray valve to regulate the direct water supply, ensuring a uniform spray pattern by opening the valve when the pump reaches a preset speed, allowing simultaneous operation with circulation nozzles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the circulation pump operates without controlling the spray time of the direct water nozzle, then the system is simple to operate, but the spray form cannot be controlled constantly when both nozzles spray simultaneously
Solution Approach 1:
The control system monitors the rotation speed of the circulation pump and uses this feedback signal to determine when to activate the direct water nozzle. When the pump reaches a predetermined rotation speed, the controller automatically opens the direct water nozzle for a predetermined time period, ensuring consistent spray form while maintaining operational simplicity.
2Manufacturing precision
If the direct water nozzle spray time is not controlled accurately based on pump rotation speed, then the control system is simpler, but the spray pattern becomes inconsistent when both circulation and direct water nozzles operate simultaneously
Solution Approach 1:
The control system is pre-programmed with the optimal spray timing parameters. When the circulation pump reaches the predetermined rotation speed, the controller automatically activates the direct water nozzle for the predetermined time period without requiring real-time calculation or adjustment, thus maintaining spray pattern consistency while minimizing control coordination time.
3Manufacturing precision
If the circulation pump rotation speed is not controlled during drum rotation, then the system is easier to operate, but the spray pattern cannot be synchronized with laundry movement
Solution Approach 1:
The control system continuously monitors the rotation speed of the circulation pump and uses this feedback to synchronize the direct water nozzle activation with the drum rotation and laundry movement patterns, achieving precise spray pattern synchronization while maintaining ease of operation through automatic control.
Solution Approach 2:
The system automatically adjusts the direct water nozzle spray timing based on the circulation pump's rotation speed without requiring manual intervention. The controller self-regulates the spray coordination, making the system easy to operate while achieving precise synchronization between spray patterns and laundry movement.
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 method enables precise control of the spray pattern, ensuring consistent water distribution through both circulation and direct water nozzles, enhancing laundry soaking and rinsing efficiency and allowing for more sophisticated algorithmic control of the washing process.
Implementation Method 1
a circulation pump configured to circulate water discharged from the water tank
Implementation Method 2
a direct water nozzle for spraying source water supplied from an external water source into the drum
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed is a method for controlling a washing machine, and a corresponding washing machine, having a tub (31) with an entry hole (12h) formed therein, a drum (32) rotating in the tub, a ring-shaped gasket (50) installed at a circumference of the entry hole (12h), a pump (36) configured to circulate water discharged from the tub (31), and at least one circulation nozzle (62b, 62c, 62d, 62e) provided in the gasket (50) and configured to spray the water pumped by the pump (36) into the drum (32), the method comprising: a step (a) of supplying water into the tub (31); a step (b) of rotating the drum (32); a step (c) of accelerating rotation of the pump (36) while the drum (32) rotates; and a step (d) of, when a rotation speed of the pump (36) reaches a preset value during the acceleration of the pump (36), opening a spray valve (75) such that water supplied from an external water source is sprayed into the drum (32) through a direct water nozzle (62a).