Patents by Inventor Liu Huazhao
Liu Huazhao 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: 9423190Abstract: A refrigerant distributor for a heat exchanger is disclosed. The refrigerant distributor comprises: a pipe for distributing a refrigerant, the pipe having a channel therein in which the refrigerant flows. The channel has at least one portion having reduced cross-section area. With the above configuration, the distributor relieves the layering of refrigerant flowing in a distributing pipe and mixes the vapor-liquid refrigerant relatively uniformly.Type: GrantFiled: March 31, 2010Date of Patent: August 23, 2016Assignees: Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Danfoss A/SInventors: Liu Huazhao, Lin-jie Huang
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Patent number: 9291407Abstract: A micro-channel heat exchanger includes an inlet manifold fluidly connected with an outlet manifold by a plurality of generally parallel tubes, further defining a plurality of generally parallel micro-channels therethrough. Refrigerant is introduced to the heat exchanger through a distributor tube disposed within the inlet manifold. The distributor tube includes a plurality of non-circular openings disposed along the length thereof which act as an outlet for refrigerant flow into the inlet manifold and eventually into and through the tubes and micro-channels. The openings are preferably slots arranged along the length of the distributor tube at an angle relative to the longitudinal direction of the distributor tube and oriented within the inlet manifold for a general direction of refrigerant flow at an angle relative to the general direction of refrigerant flow through the tubes. Alternative shapes for the openings are also considered.Type: GrantFiled: August 4, 2009Date of Patent: March 22, 2016Assignees: Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Danfoss A/SInventors: Liu Huazhao, Jiang Jianlong, Lin-Jie Huang
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Publication number: 20150377566Abstract: A micro-channel heat exchanger includes an inlet manifold fluidly connected with an outlet manifold by a plurality of generally parallel tubes, further defining a plurality of generally parallel micro-channels therethrough. Refrigerant is introduced to the heat exchanger through a distributor tube disposed within the inlet manifold. The distributor tube includes a plurality of non-circular openings disposed along the length thereof which act as an outlet for refrigerant flow into the inlet manifold and eventually into and through the tubes and micro-channels. The openings are preferably slots arranged along the length of the distributor tube at an angle relative to the longitudinal direction of the distributor tube and oriented within the inlet manifold for a general direction of refrigerant flow at an angle relative to the general direction of refrigerant flow through the tubes. Alternative shapes for the openings are also considered.Type: ApplicationFiled: September 8, 2015Publication date: December 31, 2015Inventors: Liu Huazhao, Jiang Jianlong, Lin-Jie Huang
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Patent number: 9115939Abstract: The present invention discloses a micro-channel heat exchanger comprising manifolds, a plurality of micro-channel flat tubes connected to the manifolds, and a plurality of rows of fins spaced apart by the micro-channel flat tubes. The micro-channel heat exchanger is provided with at least one bend designed to avoid the deformation of the fins on two inner sides adjacent to the bend due to crushing and meanwhile maintaining the ventilation and heat exchange functionalities of the bend. For example, the bend may include at least one row of fins where the width of the fins are less than the width of the fins on two sides adjacent to the bend. Alternatively, the gap between the fins in the bend can be greater than the gap between the fins on two sides adjacent to the bend. Still alternatively, the bend can be formed with a space for separating cores of the heat exchanger.Type: GrantFiled: October 22, 2013Date of Patent: August 25, 2015Assignees: Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Danfoss A/SInventors: Liu Huazhao, Wang Feng, Lin-Jie Huang, Gao Yuan
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Publication number: 20140041841Abstract: The present invention discloses a micro-channel heat exchanger comprising manifolds, a plurality of micro-channel flat tubes connected to the manifolds, and a plurality of rows of fins spaced apart by the micro-channel flat tubes. The micro-channel heat exchanger is provided with at least one bend designed to avoid the deformation of the fins on two inner sides adjacent to the bend due to crushing and meanwhile maintaining the ventilation and heat exchange functionalities of the bend. For example, the bend may include at least one row of fins where the width of the fins are less than the width of the fins on two sides adjacent to the bend. Alternatively, the gap between the fins in the bend can be greater than the gap between the fins on two sides adjacent to the bend. Still alternatively, the bend can be formed with a space for separating cores of the heat exchanger.Type: ApplicationFiled: October 22, 2013Publication date: February 13, 2014Inventors: Liu Huazhao, Wang Feng, Lin-jie Huang, Gao Yuan
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Publication number: 20110061844Abstract: A heat exchanger is disclosed, which comprises an inlet header defining a refrigerant chamber therein; an outlet header spaced apart from the inlet header; a plurality of tubes, two ends of each tube being connected to and communicating with the inlet and outlet headers respectively; a plurality of fins, each of which is interposed between adjacent tubes; and a distribution tube disposed outside the refrigerant chamber and formed with a distribution opening, through which the distribution tube communicates with the refrigerant chamber. According to the present invention, the distribution tube is easy to assemble, disassemble and maintain. The refrigerants in the inlet header and the distribution tube do not disadvantageously affect each other, thus enhancing distribution of refrigerant.Type: ApplicationFiled: August 31, 2010Publication date: March 17, 2011Applicant: Danfoss Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd.Inventors: Jiang Jianlong, Wang Feng, Liu Huazhao, Lin-jie Huang
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Publication number: 20110017438Abstract: A micro-channel heat exchanger includes an inlet manifold fluidly connected with an outlet manifold by a plurality of generally parallel tubes, further defining a plurality of generally parallel micro-channels therethrough. Refrigerant is introduced to the heat exchanger through a distributor tube disposed within the inlet manifold. The distributor tube includes a plurality of non-circular openings disposed along the length thereof which act as an outlet for refrigerant flow into the inlet manifold and eventually into and through the tubes and micro-channels. The openings are preferably slots arranged along the length of the distributor tube at an angle relative to the longitudinal direction of the distributor tube and oriented within the inlet manifold for a general direction of refrigerant flow at an angle relative to the general direction of refrigerant flow through the tubes. Alternative shapes for the openings are also considered.Type: ApplicationFiled: August 4, 2009Publication date: January 27, 2011Applicant: Danfoss Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd.Inventors: Liu Huazhao, Jiang Jianlong, Lin-Jie Huang
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Publication number: 20100252243Abstract: A refrigerant distributor for a heat exchanger is disclosed. The refrigerant distributor comprises: a pipe for distributing a refrigerant, the pipe having a channel therein in which the refrigerant flows. The channel has at least one portion having reduced cross-section area. With the above configuration, the distributor relieves the layering of refrigerant flowing in a distributing pipe and mixes the vapor-liquid refrigerant relatively uniformly.Type: ApplicationFiled: March 31, 2010Publication date: October 7, 2010Inventors: Liu Huazhao, Lin-jie Huang
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Publication number: 20100243226Abstract: The present invention discloses a fin for a heat exchanger, the fin is formed with louvers, and air, which is used as heat exchange medium, successively flows through said louvers when the heat exchanger operates. The louver gap of the louvers changes in the air flow direction, such that a louver gap at a certain portion of the louvers matches with an amount of frost formed at that portion. With the technical solution of the invention, the louver gap at a certain portion of the louvers is made to match with the amount of frost formed at that portion, such that a sufficient space is still left between adjacent louvers for the air to flow through. As a result, the wind resistance will not increase substantially to decrease the amount of air flowing through, and thus the heat exchange performance of the fin can be utilized completely.Type: ApplicationFiled: March 25, 2010Publication date: September 30, 2010Inventors: Liu Huazhao, Lin-jie Huang
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Publication number: 20100181058Abstract: The present invention discloses a micro-channel heat exchanger comprising manifolds, a plurality of micro-channel flat tubes connected to the manifolds, and a plurality of rows of fins spaced apart by the micro-channel flat tubes. The micro-channel heat exchanger is provided with at least one bend designed to avoid the deformation of the fins on two inner sides adjacent to the bend due to crushing and meanwhile maintaining the ventilation and heat exchange functionalities of the bend. For example, the bend may include at least one row of fins where the width of the fins are less than the width of the fins on two sides adjacent to the bend. Alternatively, the gap between the fins in the bend can be greater than the gap between the fins on two sides adjacent to the bend. Still alternatively, the bend can be formed with a space for separating cores of the heat exchanger.Type: ApplicationFiled: January 20, 2010Publication date: July 22, 2010Inventors: Liu Huazhao, Wang Feng, Gao Yuan, Lin-jie Huang