Patents by Inventor Chengfeng JIANG

Chengfeng JIANG 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: 11271404
    Abstract: This application provides a photovoltaic power optimizer and a method and apparatus for controlling same, and a photovoltaic power generation system. The photovoltaic power optimizer includes: a power optimization module, a bypass module, and a control module, where the bypass module is connected to an input end of the power optimization module, an output end of the power optimization module, and the control module, and the control module is connected to the power optimization module; and when detecting that the power optimization module is faulty, the control module is configured to control the bypass module to be on, to bypass the faulty power optimization module, so that the photovoltaic battery component can be directly connected to other battery groups in the photovoltaic power generation system, and connected to an inverter.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: March 8, 2022
    Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
    Inventors: Feng Yang, Chengyong Liu, Chengfeng Jiang
  • Publication number: 20210328436
    Abstract: A photovoltaic converter string is provided, to control, one of switching transistors in a buck/boost circuit of the photovoltaic converter to be conducted, wherein the switching transistors are connected in parallel to a bypass diode; and control the other switching transistors in the buck/boost circuit to be cut off. Therefore, an output voltage of the photovoltaic converter is applied to both ends of the non-conducted switching transistor in the switching transistors connected in parallel to the bypass diode, and after the output voltage of the photovoltaic converter reaches a breakdown voltage of the non-conducted switching transistor, an avalanche breakdown occurs on the non-conducted switching transistor, and a voltage of both ends of the bypass diode connected to a positive output end and a negative output end of the photovoltaic converter is clamped to be less than or equal to the breakdown voltage of the switching transistor.
    Type: Application
    Filed: June 29, 2021
    Publication date: October 21, 2021
    Inventors: Yongbing GAO, Panpan WANG, Chengfeng JIANG
  • Publication number: 20210198807
    Abstract: Disclosed are methods for preparing a DNA library directly from a stool sample. The method comprises applying the stool sample directly to a buffer, heating and cooling the buffer, separating a supernatant within the buffer from a precipitate using centrifugation, and transferring the supernatant into a first reaction vessel containing a first reagent mixture to yield a first reaction mixture. The method also comprises subjecting the first reaction mixture to a first PCR protocol, purifying amplicons within the first reaction vessel through a first purification procedure to yield a purified target amplicon solution, transferring the purified target amplicon solution to a second reaction vessel comprising a second reagent mixture to yield a second reaction mixture, and subjecting the second reaction mixture to a second PCR protocol. The method further comprises purifying index-tagged amplicons within the second reaction vessel through a second purification procedure to yield the DNA library.
    Type: Application
    Filed: March 17, 2020
    Publication date: July 1, 2021
    Applicant: URIT Medical Electronic Co., Ltd.
    Inventors: Tom Cheng XU, Chengfeng JIANG, Jinlan XU, Chunyan LIAO
  • Patent number: 10917014
    Abstract: A free-wheeling diode control method includes determining whether a sum of a first pulse width value of a free-wheeling diode obtained according to an inductance current law and a third pulse width value of a main control tube meets a first preset condition, obtaining a determining result, and controlling, according to the determining result, conduction of the free-wheeling diode according to the first pulse width value or a second pulse width value of the free-wheeling diode obtained according to a volt-second balance law.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: February 9, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Chengfeng Jiang, Hongfeng Liang
  • Publication number: 20200266630
    Abstract: A physical address determining method, apparatus, and device, and a storage medium, and belongs to the field of solar power generation, includes: controlling at least two slave nodes to sequentially start up, and detecting a change status of an input voltage of the master node; dividing a photovoltaic power generation system into a plurality of photovoltaic strings; and for each candidate photovoltaic string, controlling any slave node located in the candidate photovoltaic string to start up and other slave nodes to shut down, and using the physical address as a physical address of the candidate photovoltaic string. This disclosure provides a manner of automatically determining a physical address of a photovoltaic string, thereby implementing photovoltaic-string locating and expanding a system function range. When an anomaly occurs, the anomaly can be eliminated in a timely manner, thereby improving system stability.
    Type: Application
    Filed: May 6, 2020
    Publication date: August 20, 2020
    Inventors: Chengfeng JIANG, Chengyong LIU, Qingyuan WANG
  • Publication number: 20200204077
    Abstract: A free-wheeling diode control method includes determining whether a sum of a first pulse width value of a free-wheeling diode obtained according to an inductance current law and a third pulse width value of a main control tube meets a first preset condition, obtaining a determining result, and controlling, according to the determining result, conduction of the free-wheeling diode according to the first pulse width value or a second pulse width value of the free-wheeling diode obtained according to a volt-second balance law.
    Type: Application
    Filed: February 28, 2020
    Publication date: June 25, 2020
    Inventors: Chengfeng Jiang, Hongfeng Liang
  • Publication number: 20200185923
    Abstract: This application provides a photovoltaic power optimizer and a method and apparatus for controlling same, and a photovoltaic power generation system. The photovoltaic power optimizer includes: a power optimization module, a bypass module, and a control module, where the bypass module is connected to an input end of the power optimization module, an output end of the power optimization module, and the control module, and the control module is connected to the power optimization module; and when detecting that the power optimization module is faulty, the control module is configured to control the bypass module to be on, to bypass the faulty power optimization module, so that the photovoltaic battery component can be directly connected to other battery groups in the photovoltaic power generation system, and connected to an inverter.
    Type: Application
    Filed: February 18, 2020
    Publication date: June 11, 2020
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Feng Yang, Chengyong Liu, Chengfeng Jiang
  • Publication number: 20190086144
    Abstract: Provided are a refrigeration device and a cold water temperature control method for same. The control method comprises the following steps: controlling a refrigeration device to enter a heat preservation state (S1); detecting a water temperature in a water tank (10) in the refrigeration device (S2); and if the water temperature is greater than a first pre-set temperature, controlling the refrigeration device to carry out a refrigeration operation for a pre-set time so that the water temperature is less than a second pre-set temperature, and controlling the refrigeration device to stop the refrigeration operation after the pre-set time (S3), wherein the second pre-set temperature is less than or equal to the first pre-set temperature. The water temperature control is realized by means of a pre-set time, so that the temperature of cold water can be more precisely controlled.
    Type: Application
    Filed: April 30, 2015
    Publication date: March 21, 2019
    Inventors: Jianzhou Xie, Caixia Wang, Xingfan Li, Chengfeng Jiang
  • Patent number: 9909184
    Abstract: Disclosed are methods, compositions, and diagnostic kits for the rapid detection of certain types of ?-thalassemia and ?-thalassemia. In some embodiments, a diagnostic kit, reagents, and methods are disclosed for the rapid detection of various ?-thalassemia and ?-thalassemia genotypes in multiple patient samples using real-time PCR. More specifically, in certain embodiments, diagnostic kits, reagents, and methods are disclosed for the rapid detection of up to seven different ?-thalassemia genotypes and twenty different ?-thalassemia genotypes in one single multiplex real-time PCR reaction.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: March 6, 2018
    Assignee: URIT Medical Electronic Co., Ltd.
    Inventors: Tom Cheng Xu, Jun Liu, Chengfeng Jiang, Jinlan Xu, Lili Sun
  • Publication number: 20180057880
    Abstract: Disclosed are methods, compositions, and diagnostic kits for the rapid detection of certain types of ?-thalassemia and ?-thalassemia. In some embodiments, a diagnostic kit, reagents, and methods are disclosed for the rapid detection of various ?-thalassemia and ?-thalassemia genotypes in multiple patient samples using real-time PCR. More specifically, in certain embodiments, diagnostic kits, reagents, and methods are disclosed for the rapid detection of up to seven different ?-thalassemia genotypes and twenty different ?-thalassemia genotypes in one single multiplex real-time PCR reaction.
    Type: Application
    Filed: August 23, 2017
    Publication date: March 1, 2018
    Applicant: URIT Medical Electronic Co., Ltd.
    Inventors: Tom Cheng XU, Jun LIU, Chengfeng JIANG, Jinlan XU, Lili SUN
  • Patent number: 9856127
    Abstract: Provided is a water supply apparatus (100) including: a cooling tank (1), a refrigerating systems and a heat exchange device (4). The cooling tank is provided with a cold water outlet (11) and suitable to connected to water source; the refrigeration system comprises a compressor (31), a condenser (32), a throttling device (33) and the evaporator (34). The heat exchange device (4) is arranged outside the cooling tank (1) and provided with a water inlet (41) and a water outlet (42) communicating with the inside of the cooling tank (1), wherein the heat exchange device (4) is constructed such that water in the cooling tank (1) flows into the heat exchange device (4) from the water inlet (41) and performs a heat exchange with the evaporator (34), the water after the heat exchange flows out from the water outlet (42) and flows back to the cooling tank (1).
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: January 2, 2018
    Assignees: FOSHAN MIDEA CHUNGHO WATER PURIFACTION EQUIPMENT CO., LTD., MIDEA GROUP CO., LTD.
    Inventors: Chengfeng Jiang, Yong Gao, Xingfan Li, Jianzhou Xie
  • Publication number: 20170008749
    Abstract: Provided is a water supply apparatus (100) including: a cooling tank (1), a refrigerating systems and a heat exchange device (4). The cooling tank is provided with a cold water outlet (11) and suitable to connected to water source; the refrigeration system comprises a compressor (31), a condenser (32), a throttling device (33) and the evaporator (34). The heat exchange device (4) is arranged outside the cooling tank (1) and provided with a water inlet (41) and a water outlet (42) communicating with the inside of the cooling tank (1), wherein the heat exchange device (4) is constructed such that water in the cooling tank (1) flows into the heat exchange device (4) from the water inlet (41) and performs a heat exchange with the evaporator (34), the water after the heat exchange flows out from the water outlet (42) and flows back to the cooling tank (1).
    Type: Application
    Filed: April 30, 2015
    Publication date: January 12, 2017
    Inventors: Chengfeng JIANG, Yong GAO, Xingfan LI, Jianzhou XIE