Haier US Appliance Solutions, Inc.

Taehyun Yoon

Wonmyung Seo

Seong Hoon Ryu

A controller is configured to monitor the pressure measurement of the pressure sensor and record an ambient temperature measurement in response to the pressure measurement stabilizing. Activate the pump and a timer in response to a drain cycle starting. The controller also configured to record a turbidity measurement from the turbidity sensor, a conductivity measurement from the conductivity sensor, and a temperature measurement from the temperature sensor and compare the turbidity measurement to a reference turbidity value, the conductivity measurement to a reference conductivity value, and the temperature measurement to the ambient temperature measurement. Then determine either a presence or an absence of fluid in the wash tub based at least in part on the turbidity measurement, the conductivity measurement, and the temperature measurement, and deactivate the pump in response to either the timer expiring or the determination of the absence of fluid in the wash tub.

Systems and methods for drain pump operation in washing machine appliances

A controller is in signal communication with a pressure sensor, a turbidity sensor, a conductivity sensor and a temperature sensor. The controller is configured to monitor the pressure measurement of the pressure sensor and record an ambient temperature measurement in response to the pressure measurement stabilizing. The controller is also configured to record a turbidity measurement from the turbidity sensor, a conductivity measurement from the conductivity sensor, and a temperature measurement from the temperature sensor in response to the pressure measurement incrementing. Additionally, the controller is configured to compare the turbidity measurement to a reference turbidity value, the conductivity measurement to a reference conductivity value, and the temperature measurement to the ambient temperature measurement, and determine either a presence or an absence of fluid in the wash tub based at least in part on the turbidity measurement, the conductivity measurement, and the temperature measurement.

Systems and methods for failure detection of a pressure sensor in washing machine appliances

A pump is configured to drain liquid from the wash basket. A vent line extends between the wash basket and the cabinet. The vent line includes a fan, a humidity sensor proximate the fan, and a controller. The controller is operable to perform a drain cycle. The drain cycle includes activating the pump. Comparing, across a set interval of time, a humidity within the washing machine appliance to a reference humidity. Determining the humidity's proximity to the reference humidity. Detecting a fault in the drain cycle in response to the humidity exceeding the reference humidity. Continuing a rinse cycle in response to the humidity being proximate the reference humidity.

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Gyeonggi, South Korea

Taehyun Yoon