The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2024
Filed:
Jan. 16, 2020
Qingdao Haier Drum Washing Machine Co., Ltd., Shandong, CN;
Haier Smart Home Co., Ltd., Shandong, CN;
Tao Huang, Shandong, CN;
Yuliang Jiang, Shandong, CN;
QINGDAO HAIER DRUM WASHING MACHINE CO., LTD., Shandong, CN;
HAIER SMART HOME CO., LTD., Shandong, CN;
Abstract
An additive auto-feeding device, including a water supply flow channel; a liquid storage box containing an additive; a suction structure capable of sucking the additive to the flow channel and transferring the additive to a water outlet; and an anti-back suction device at a pressure adjusting opening of the flow channel. When water enters the flow channel, under the pressure effect of flowing water, the anti-back suction device closes the pressure adjusting opening; and when negative pressure is generated in the flow channel, the anti-back suction device opens the pressure adjusting opening for adjusting the pressure in the flow channel. The pressure adjusting device automatically adjusts opening and closing of an air hole to correspondingly adjust the pressure in a tube and avoid existence of negative pressure in the tube, thus achieving a backflow prevention function.