Systems and methods for detecting the discharge outlet of a washing machine.

By combining the water level detection system and the controller, the problem of washing fluid backflow caused by the raising of the external discharge port in the washing machine was solved, achieving more precise washing fluid control and water conservation.

CN116234952BActive Publication Date: 2026-07-17QINGDAO HAIER WASHING MASCH CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO HAIER WASHING MASCH CO LTD
Filing Date
2021-07-16
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In traditional washing machines, if the drain hose is particularly long or the riser is too high, the drain pump cannot completely discharge the washing fluid, causing residual fluid to flow back, resulting in either an overfilled washing tub or insufficient washing fluid supply.

Method used

A water level detection system and controller are used to measure the pressure in the storage tank, control the operation of the supply valve and discharge components, determine whether the external discharge port is being raised, and take corresponding compensation measures to ensure that the pressure in the storage tank reaches the target value.

Benefits of technology

Precisely adjust the amount of washing fluid to avoid backflow of residual fluid, thereby improving washing effect and water resource utilization efficiency.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN116234952B_ABST
    Figure CN116234952B_ABST
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Abstract

A washing machine includes a reservoir for collecting washing fluid, a supply valve for supplying the washing fluid, a discharge assembly for discharging the washing fluid from the reservoir, and a water level detection system for measuring the reservoir pressure / fill level. A controller is configured to perform an initial filling cycle and determine a first volume of washing fluid required to reach a target pressure. The discharge assembly then discharges the reservoir, and the process is repeated to determine a second volume of washing fluid required to reach the target pressure. The difference between the first and second volumes is at least partially due to washing fluid that the discharge assembly cannot discharge through the discharge hose. If the difference between the first and second volumes exceeds a predetermined threshold, the controller can determine that an external discharge port is being raised and compensate accordingly.
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