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Title:
RAISING/LOWERING SYNCHRONIZATION SYSTEM FOR REFRIGERATOR RACK AND CONTROL METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2018/086504
Kind Code:
A1
Abstract:
Provided are a raising/lowering synchronization system (10) for a refrigerator rack and a control method thereof. The system comprises: a controller, a rack body (11), and at least two raising/lowering mechanisms (12). Each raising/lowering mechanism (12) comprises: a motor (121); a drive screw (122); a guide rod (123) provided thereon with a top limiting device (126) and a bottom limiting device (127); and a connecting member (124) provided thereon with a sliding nut (125) that is raised or lowered to drive the connecting member (124) and the rack body (11) to move along the guide rod (123). When the connecting member (124) touches the top limiting device (126) or the bottom limiting device (127), the top limiting device (126) or the bottom limiting device (127) feeds back a position signal of the connecting member (124) to a controller; the controller is configured to control the motor to stop operating according to the position signal fed back by the top limiting device (126) or the bottom limiting device (127). The method comprises: a sensor collects rotation speed and step number signals of each motor (121) and feeds back the signals to a controller; when the controller analyzes that the rotation speed and step number signals of different motors (121) are different, the controller issues a control signal to each motor (121) to adjust rotation speeds and step numbers of all the motors (121) until all the motors (121) operate synchronously.

More Like This:
WO/2018/174432REFRIGERATOR
Inventors:
TANG, Haidong (Haier Industry Park, Haier Road No. 1 Laoshan Distric, Qingdao Shandong 1, 266101, CN)
LIU, Mingyong (Haier Industry Park, Haier Road No. 1 Laoshan Distric, Qingdao Shandong 1, 266101, CN)
WU, Guangrui (Haier Industry Park, Haier Road No. 1 Laoshan Distric, Qingdao Shandong 1, 266101, CN)
ZHANG, Heng (Haier Industry Park, Haier Road No. 1 Laoshan Distric, Qingdao Shandong 1, 266101, CN)
WANG, Ning (Haier Industry Park, Haier Road No. 1 Laoshan Distric, Qingdao Shandong 1, 266101, CN)
Application Number:
CN2017/109668
Publication Date:
May 17, 2018
Filing Date:
November 07, 2017
Export Citation:
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Assignee:
QINGDAO HAIER JOINT STOCK CO., LTD. (Haier Industry Park, Haier Road No. 1 Laoshan Distric, Qingdao Shandong 1, 266101, CN)
International Classes:
F25D25/02; F25D29/00; H02P6/04
Foreign References:
CN106595211A2017-04-26
CN106568291A2017-04-19
CN102667377A2012-09-12
CN104006598A2014-08-27
CN1740712A2006-03-01
CN202511557U2012-10-31
KR20140059018A2014-05-15
CH688246A51997-06-30
DE102005043356A12007-03-15
Attorney, Agent or Firm:
SUZHOU WISPRO INTELLECTUAL PROPERTY AGENCY (XIE Anne, Apt 506 Building 99999 Xinghu Street, Suzhou Industrial Par, Suzhou Jiangsu 8, 215028, CN)
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