Patents by Inventor Defang Guo

Defang Guo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11146776
    Abstract: The present invention relates to a device and method for 3D laser imaging with a longitudinal range. An optical sensor array detects a 3D image of a target through a delay difference of laser transmission between pixels. During detection, two or more identical laser pulses are sequentially emitted to the target. Each time when a pulse is emitted, a gray image of the target is formed, and multiple pulses form multiple images. By controlling a shutter, the laser pulse returned in each imaging is truncated to varying degrees, and several charge coupled device (CCD) images with different exposures are obtained. A time-varying gray curve of each pixel is extracted, and a waveform of the corresponding laser pulse is restored. A position of a pulse peak of each pixel on a time coordinate is determined to obtain the distribution of the laser delay difference between the pixels, thereby realizing 3D imaging.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: October 12, 2021
    Inventors: Shiyu Wang, Defang Cai, Mengyao Wu, Zhen Guo
  • Publication number: 20210262690
    Abstract: The present application discloses a multi-split air conditioner and a control method thereof. The multi-split air conditioner includes a plurality of outdoor heat exchangers connected in parallel to a refrigerant main circulation passage, wherein a parallel branch in which each of the plurality of outdoor heat exchangers is located is provided with a branch control valve capable of controlling a flow rate of refrigerant flowing through the parallel branch. The control method includes: determining a current superheat degree of the multi-split air conditioner; when the current superheat degree of the multi-split air conditioner deviates from a set target superheat degree, controlling and regulating the flow rate of the refrigerant flowing through the branch control valve; and controlling and regulating the flow rate of the refrigerant flowing through the air supplement control valve according to the flow rate of the refrigerant flowing through each of branch control valves.
    Type: Application
    Filed: May 28, 2019
    Publication date: August 26, 2021
    Inventors: Jingsheng Liu, Qiang Song, Tao Ren, Qingliang Meng, Yinyin Li, Jiangbin Liu, Defang Guo, Xueyan Tan
  • Publication number: 20210167990
    Abstract: A relay device and a multi-split control system that achieve reliable communication between an outdoor air conditioning unit and multiple indoor units under the condition that the length of a communication bus is limited. The system expands the communication distance by a cascade path formed by a plurality of relay devices. The cascade path transmits control signals sent by a master control device/a specific slave control device (i.e. a slave control device communicating with the master control device or certain relay device) to corresponding slave control devices one by one, and the corresponding slave control devices transmit the signals to the master control device/specific slave control device according to a response signal fed back by the control signal, where the relay devices may respectively communicate with a source node device and a destination node device on the basis of the master-slave type communication mode.
    Type: Application
    Filed: January 21, 2019
    Publication date: June 3, 2021
    Applicants: Qingdao Haier Air-conditioning Electronic Co., Ltd, Haier Smart Home Co., Ltd.
    Inventors: Defang GUO, Benhai YUAN, Ruigang ZHANG, Bin SHI, Baitian ZHUO, Shaojiang CHENG, Jun WANG
  • Publication number: 20210041148
    Abstract: An oil return control method for a multi-split air conditioner and a system accomplishing the same includes: calculating an average exhaust pressure within an oil return period Pd_AVG; determining whether the average exhaust pressure Pd_AVG?the set threshold Pdthreshold; if Pd_AVG?Pdthreshold, maintaining the multi-split air conditioner working in heating mode to ensure an acceptable oil return performance without affecting the air conditioning effect of indoor unit in heating mode; if Pd_AVG<Pdthreshold, switching the multi-split air conditioner to cooling mode, stopping a fan within those power-on indoor units and entering into a cooling oil return process and switching the multi-split air conditioner back to heating mode until the cooling oil return process ends.
    Type: Application
    Filed: January 28, 2019
    Publication date: February 11, 2021
  • Publication number: 20200056798
    Abstract: The present disclosure discloses a control device for an outdoor fan of an air conditioner. The device includes: an outdoor environment temperature detection unit configured to detect an outdoor environment temperature; a first temperature detection unit and a second temperature detection unit configured to detect an outdoor condenser coil temperature; a calculation unit configured to calculate a target rotational speed of the outdoor fan according to the outdoor environment temperature and the outdoor condenser coil temperature; and a control unit configured to control the outdoor fan to operate at the target rotational speed. The present disclosure further discloses a control method for an outdoor fan of an air conditioner.
    Type: Application
    Filed: April 9, 2018
    Publication date: February 20, 2020
    Inventors: Gongzeng Yang, Chao Gu, Defang Guo