Patents by Inventor Keqin Liu
Keqin Liu 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).
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Patent number: 11811263Abstract: The present invention provides a power conversion method, apparatus, and device, and a medium. The power conversion apparatus comprises: a configurable input interface, a power conversion circuit, and a configurable output interface. The configurable input interface is provided to configure a first electrical connection mode between an input power supply and the power conversion circuit, and to electrically connect the input power supply to the power conversion circuit. The configurable output interface is provided to configure a second electrical connection mode between a load and the power conversion circuit, and to electrically connect the load to the power conversion circuit. The power conversion circuit is provided to perform corresponding power conversion according to a parameter of the input power supply and a parameter of the load.Type: GrantFiled: June 13, 2019Date of Patent: November 7, 2023Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAIInventors: Jing Wang, Shiyong Jiang, Wu Wen, Keqin Liu, Peng Ren
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Patent number: 11796194Abstract: Disclosed is a control parameter determining method for a photovoltaic air conditioning system, specifically including: determining a real-time inductance parameter of a controlled object of the photovoltaic air conditioning system according to real-time grid-connected power of the photovoltaic air conditioning system; substituting the real-time inductance parameter into the controlled object of the control system to calculate a basic control parameter of the control system; presetting a plurality of adjustment parameters corresponding to different grid-connected power respectively; when the real-time grid-connected power is matched with one of the grid-connected power, selecting an adjustment parameter corresponding to the matched grid-connected power to modify the basic control parameter, to obtain a target control parameter. The present disclosure further disclosed a control parameter determining apparatus and a control system for a photovoltaic air conditioning system.Type: GrantFiled: April 18, 2017Date of Patent: October 24, 2023Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAIInventors: Jianhua Li, Hewei Lou, Keqin Liu, Weitao Ni, Jing Wang
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Patent number: 11502511Abstract: A control method for a direct current electrical device and a direct current electrical device. The method includes: acquiring input parameters of a power supply of the direct current electrical device, identifying a type of the power supply according to the input parameters, and determining an operation mode of the direct current electrical device corresponding to the type of the power supply, and controlling an operation of the direct current electrical device according to the operation mode.Type: GrantFiled: July 22, 2019Date of Patent: November 15, 2022Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAIInventors: Jing Wang, Shiyong Jiang, Keqin Liu, Wu Wen, Xuefen Zhang, Peng Ren
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Publication number: 20220123583Abstract: A power conversion method, apparatus, and device, and a medium. The power conversion apparatus includes a configurable input interface, a power conversion circuit, and a configurable output interface. The configurable input interface is provided to configure a first electrical connection mode between an input power supply and the power conversion circuit, and to electrically connect the input power supply to the power conversion circuit. The configurable output interface is provided to configure a second electrical connection mode between a load and the power conversion circuit, and to electrically connect the load to the power conversion circuit. The power conversion circuit is provided to perform corresponding power conversion according to a parameter of the input power supply and a parameter of the load. The embodiments resolve at least the problem in the related art of poor general applicability of a power conversion apparatus, thereby improving the general applicability of the power conversion apparatus.Type: ApplicationFiled: June 13, 2019Publication date: April 21, 2022Applicant: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAIInventors: Jing WANG, Shiyong JIANG, Wu WEN, Keqin LIU, Peng REN
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Publication number: 20210399573Abstract: Disclosed are a photovoltaic and a charging control method, device and circuit thereof, and a storage medium. The charging control circuit includes: a double-relay circuit and a charging relay circuit, wherein the double-relay circuit is arranged between a grid side circuit and a machine side circuit of the photovoltaic electric appliance; and the charging relay circuit is configured to turn on to realize the gradual charging of a bus capacitor when the double-relay circuit is not turned one. A charging relay circuit is added to an alternating-current power supply side, so that when double relays are not closed, a charging relay can be closed to realize the gradual charging of a bus capacitor.Type: ApplicationFiled: August 15, 2019Publication date: December 23, 2021Inventors: Han Liu, Ningning Chen, Xuefen Zhang, Keqin Liu
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Publication number: 20210372652Abstract: This disclosure provides an air-conditioning equipment and an electric energy processing method for the air-conditioning equipment, and relates to the technical field of electric appliance, while the air-conditioning equipment includes: an equipment module; and a power port module connected to the equipment module, and configured to be connected to a bus opened by an energy system, for providing the equipment module with an electric energy output by the energy system via the bus.Type: ApplicationFiled: December 14, 2018Publication date: December 2, 2021Inventors: Keqin Liu, Shiyong Jiang, Jing Wang, Wu Wen, Xuefen Zhang, Peng Ren
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Publication number: 20210344195Abstract: A control method for a direct current electrical device and a direct current electrical device. The method includes: acquiring input parameters of a power supply of the direct current electrical device (S102), identifying a type of the power supply according to the input parameters (S104), and determining an operation mode of the direct current electrical device corresponding to the type of the power supply, and controlling an operation of the direct current electrical device according to the operation mode (S106). The present disclosure improves the universality and operation performance of a direct current electrical device.Type: ApplicationFiled: July 22, 2019Publication date: November 4, 2021Inventors: Jing WANG, Shiyong JIANG, Keqin LIU, Wu WEN, Xuefen ZHANG, Peng REN
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Publication number: 20210249884Abstract: The present disclosure relates to a charging device and a charging system. The charging device includes a Direct Current (DC) bus access terminal configured for electrical connection with a DC bus to electrically connect the charging device to the DC bus a load access terminal configured for electrical connection with a load to be charged, to electrically connect the charging device to the load to be charged; a charging circuit having an input terminal electrically connected to the DC bus access terminal, and an output terminal electrically connected to the load access terminal, to charge electrical energy of the PC bus into the load to be charged; and a control circuit electrically connected to the charging circuit, for controlling the charging circuit to complete a charging process.Type: ApplicationFiled: December 19, 2018Publication date: August 12, 2021Inventors: Ningning Chen, Chongyang Feng, Shiyong Jiang, Keqin Liu, Jing Wang
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Patent number: 11015821Abstract: A method for controlling a photovoltaic air conditioning system. The method comprises: detecting a grid frequency (101); when the detected grid frequency is not equal to a pre-set frequency, calculating and obtaining a control parameter according to the detected grid frequency (102); and controlling a photovoltaic air conditioning by means of the calculated and obtained control parameter (103). Also disclosed is a photovoltaic air conditioning control device.Type: GrantFiled: October 25, 2016Date of Patent: May 25, 2021Inventors: Mingzhu Dong, Zhigang Zhao, Shiyong Jiang, Chongyang Feng, Jiangxi Song, Xuefen Zhang, Keqin Liu, Jing Wang
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Patent number: 10966346Abstract: A method, a device and a system for controlling heat dissipation of an electrical cabinet are provided. The method includes: a heating capacity in the electrical cabinet is predicted; according to the heating capacity predicted, a corresponding heat dissipation capacity is determined; and a rotational speed of a heat dissipation fan is controlled, so that a difference between the heating capacity and the heat dissipation capacity is within a predetermined range.Type: GrantFiled: April 21, 2017Date of Patent: March 30, 2021Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAIInventors: Keqin Liu, Yingshuai You, Chongyang Feng
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Patent number: 10811333Abstract: The disclosure relates to the field of electronic elements, and discloses an Insulated Gate Bipolar Transistor (IGBT) module assembly which comprises a cooling plate and an IGBT module fixedly connected to the cooling plate, wiring terminals are arranged at an end face of the IGBT module, which is away from the cooling plate, the IGBT module comprises a side face adjacent to the end face, and the side face and the cooling plate form a water guiding groove. In the disclosure, the side face and the cooling plate form the water guiding groove, and a great amount of condensed water collected on the cooling plate can be guided to flow out through the water guiding groove instead of flowing to the end face of the IGBT module, on which the wiring terminals are arranged.Type: GrantFiled: April 1, 2017Date of Patent: October 20, 2020Assignee: Gree Electric Appliances, Inc. of ZhuhaiInventors: Jing Wang, Shiyong Jiang, Yu Zhang, Keqin Liu
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Patent number: 10612810Abstract: A method for controlling an air conditioner outdoor unit comprises: acquiring the working mode of the air conditioner outdoor unit; acquiring sensor parameters of the air conditioner outdoor unit according to the working mode, the sensor parameters including wind direction parameters read by a wind direction sensor (163) or temperature parameters read by a temperature sensor (161); determining control parameters for the air conditioner outdoor unit by the working mode and the sensor parameters corresponding to the working mode; driving the rotating speed of a fan (121) and the rotating angle of a wind direction adjusting device (125) by use of the control parameters. In addition, a control system for the air conditioner outdoor unit is also related to.Type: GrantFiled: August 21, 2015Date of Patent: April 7, 2020Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAIInventors: Xuefen Zhang, Zhigang Zhao, Peng Ren, Shiyong Jiang, Keqin Liu, Chongyang Feng, Jinrong Yuan, Yingyi Jiang
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Patent number: 10504065Abstract: An employee compensation modeling approach generates a model from a stored template. The model template may include fields for eligibility rules, performance ratings, guidelines, exchange rates, pay ranges, and other information. A modeling engine then populates that model with specific data from a human resources (HR) database, according to the structure of the template. Examples of HR data stored in an underlying database can include employee names, job codes, pay grades, physical job locations, base salaries, and other compensation-relevant information. The resulting compensation model includes a name, a description, target(s), and other information including allocation(s). The compensation model is displayed on an interface configured to receive further user inputs for purposes of model exploration and/or update.Type: GrantFiled: June 16, 2016Date of Patent: December 10, 2019Assignee: SUCCESSFACTORS, INC.Inventors: Feng Sun, Amy Dines, Tatiana Jordan, Ke Chen, Keqin Liu
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Publication number: 20190219286Abstract: Disclosed is a control parameter determining method for a photovoltaic air conditioning system, specifically including: determining a real-time inductance parameter of a controlled object of the photovoltaic air conditioning system according to real-time grid-connected power of the photovoltaic air conditioning system; substituting the real-time inductance parameter into the controlled object of the control system to calculate a basic control parameter of the control system; presetting a plurality of adjustment parameters corresponding to different grid-connected power respectively; when the real-time grid-connected power is matched with one of the grid-connected power, selecting an adjustment parameter corresponding to the matched grid-connected power to modify the basic control parameter, to obtain a target control parameter. The present disclosure further disclosed a control parameter determining apparatus and a control system for a photovoltaic air conditioning system.Type: ApplicationFiled: April 18, 2017Publication date: July 18, 2019Inventors: Jianhua LI, Hewei LOU, Keqin LIU, Weitao NI, Jing WANG
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Publication number: 20190208663Abstract: A method, a device and a system for controlling heat dissipation of an electrical cabinet are provided. The method includes: a heating capacity in the electrical cabinet is predicted; according to the heating capacity predicted, a corresponding heat dissipation capacity is determined; and a rotational speed of a heat dissipation fan is controlled, so that a difference between the heating capacity and the heat dissipation capacity is within a predetermined range.Type: ApplicationFiled: April 21, 2017Publication date: July 4, 2019Inventors: Keqin Liu, Yingshuai You, Chongyang Feng
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Publication number: 20190131205Abstract: The disclosure relates to the field of electronic elements, and discloses an Insulated Gate Bipolar Transistor (IGBT) module assembly which comprises a cooling plate and an IGBT module fixedly connected to the cooling plate, wiring terminals are arranged at an end face of the IGBT module, which is away from the cooling plate, the IGBT module comprises a side face adjacent to the end face, and the side face and the cooling plate form a water guiding groove. In the disclosure, the side face and the cooling plate form the water guiding groove, and a great amount of condensed water collected on the cooling plate can be guided to flow out through the water guiding groove instead of flowing to the end face of the IGBT module, on which the wiring terminals are arranged.Type: ApplicationFiled: April 1, 2017Publication date: May 2, 2019Applicant: Gree Electric Appliances, Inc. of ZhuhaiInventors: Jing Wang, Shiyong Jiang, Yu Zhang, Keqin Liu
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Publication number: 20180347834Abstract: A method for controlling a photovoltaic air conditioning system. The method comprises: detecting a grid frequency (101); when the detected grid frequency is not equal to a pre-set frequency, calculating and obtaining a control parameter according to the detected grid frequency (102); and controlling a photovoltaic air conditioning by means of the calculated and obtained control parameter (103). Also disclosed is a photovoltaic air conditioning control device.Type: ApplicationFiled: October 25, 2016Publication date: December 6, 2018Inventors: Mingzhu Dong, Zhigang Zhao, Shiyong Jiang, Chongyang Feng, Jiangxi Song, Xuefen Zhang, Keqin Liu, Jing Wang
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Publication number: 20180287557Abstract: A method, an apparatus, and a system for detecting the working state of a photovoltaic panel, and a photovoltaic electrical system are provided. The photovoltaic panel is arranged in a photovoltaic electrical system including a photovoltaic device and a control device. The photovoltaic device includes the photovoltaic panel and a modulator. The control device includes a demodulator. The photovoltaic device is connected to the control device via a direct current bus. The method includes: detecting the operating state of the photovoltaic panel to obtain a state parameter; modulating, through the modulator, the state parameter to obtain a modulated signal, and loading the modulated signal to the direct current bus; transmitting the modulated signal to the demodulator through the direct current bus. The demodulator demodulates the modulated signal to obtain the state parameter.Type: ApplicationFiled: October 25, 2016Publication date: October 4, 2018Applicants: Gree Electric Appliances, INC. of Zhuhai, Gree Electric Appliances, INC. of ZhuhaiInventors: Shiyong Jiang, Chongyang Feng, Xuefen Zhang, Jing Wang, Keqin Liu, Jiangxi Song, Peng Ren, Wu Wen, Baowei Lin
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Publication number: 20180060409Abstract: A method may include: generating, by a controller, a first user interface configured to control selection of a first attribute from a set of attributes; generating, by the controller, a second user interface generated based on the controlled selection of the first attribute, the second user interface configured to enable selection of values with respect to the first attribute; generating, by the controller, a first query to enable querying at the database based on the one or more values with respect to the first attribute; generating, by the controller, a second query for execution at the database, when the first query fails to respond with a match, the second query including a first vector representative of a profile to enable querying the database; and generating, in response to the first query and/or the second query, a third user interface indicative of a result.Type: ApplicationFiled: December 14, 2016Publication date: March 1, 2018Inventors: Dipesh Bhattacharya, Sharosh Rajasekher, Jiandong Shi, Keqin Liu, Li Wei Xu, Kejun Zhu, Biao Hao, Xiaoxin Wu, Taihong Wu, Jiaojiao Wang, Xiao Gao
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Patent number: D933623Type: GrantFiled: September 30, 2020Date of Patent: October 19, 2021Assignee: Shenzhen Qiweiying Technology Co., LTDInventor: Keqin Liu