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公开(公告)号：US10356962B2
公开(公告)日：2019-07-16
申请号：US15024473
申请日：2014-06-25
发明人： Hongbo Li , Hua Liu , Zhiping Zhang , Yu Zhou , Huaican Liu
摘要： The invention discloses a power electronic device cooling system, which includes an air conditioning unit, a coolant pump (31), a bypass throttling element (32) and a cooler. The coolant pump (31) takes liquid from a first condenser (13) of the air conditioning unit, a liquid coolant enters the cooler after being throttled by the bypass throttling element (32), the low-temperature coolant cools a power electronic device at the cooler, and the coolant enters an evaporator (11) of the air conditioning unit to finish a cooling cycle after flowing out of the cooler. The power electronic device cooling system has a good cooling effect, and is high in cooling efficiency, small in equipment size and low in noise, and moreover, the power electronic device may be located in a sealed environment and prevented from influence of dust, and is internally clean and long in operation life.
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公开(公告)号：US10323653B2
公开(公告)日：2019-06-18
申请号：US15103942
申请日：2014-08-05
发明人： Hongxing Wang , Zhiping Zhang , Ruixing Zhong , Nan Jiang , Rong Xie , Caiyun Jiang , Jianfei Liu , Yuhui Chen
摘要： The invention discloses a centrifugal compressor. The centrifugal compressor includes multiple stages of compression units which are communicated in sequence. Each stage of compression unit includes a diffusion cavity (1) and a diffusion adjustment device, wherein the diffusion adjustment device includes a movable member (21) configured to change a radial flow area of the diffusion cavity (1) provided in correspondence thereto, the movable member (21) being movably provided in an axial direction of the centrifugal compressor. The invention also discloses a centrifugal unit having the centrifugal compressor. The movable member of each stage of compression unit of the centrifugal compressor changes the radial flow area of the diffusion cavity of this stage of compression unit, thereby effectively reducing the possibility of surging.
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公开(公告)号：US20170306981A1
公开(公告)日：2017-10-26
申请号：US15516108
申请日：2014-12-26
发明人： Jianfei Liu , Zhiping Zhang , Ruixing Zhong , Nan Jiang , Caiyun Jiang , Rong Xie , Yuhui Chen , Baoqian Huang
IPC分类号： F04D29/62 , F25B31/00 , F04B41/06 , F04B39/06 , F04D25/16 , F25B41/04 , F25B31/02 , F25B41/00
CPC分类号： F04D29/628 , F04B39/066 , F04B41/06 , F04D17/12 , F04D25/16 , F04D29/4206 , F25B31/00 , F25B31/006 , F25B31/02 , F25B41/00 , F25B41/04
摘要： The present application discloses a volute structure, a centrifugal compressor and a refrigeration device. The volute structure comprises: a cabinet (8), a volute casing (1) and a backflow device (5); the volute casing (1) comprises an inner volute and an outer volute separately provided, a fluid flow passage being formed between the inner volute and outer volute, and the inner volute and backflow device (5) being disposed together. The present application increases the length of the first-stage diffuser, improving the diffusion effect of air entering the first-stage diffuser and thus enhancing the unit performance of the centrifugal compressor.
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公开(公告)号：USD754557S1
公开(公告)日：2016-04-26
申请号：US29512817
申请日：2014-12-23
设计人： Hongxing Wang , Zhiping Zhang , Ruixing Zhong , Nan Jiang , Rong Xie , Caiyun Jiang , Jianfei Liu , Yuhui Chen , Baoqian Huang
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公开(公告)号：US11608833B2
公开(公告)日：2023-03-21
申请号：US17295723
申请日：2019-10-24
发明人： Hua Liu , Zhiping Zhang , Hongbo Li , Ruixing Zhong , Yuhui Chen , Wenteng Ye , Jingli Qi , Sheng Liu
IPC分类号： F04D29/051 , F04D17/10 , F04D29/053 , F04D29/44
摘要： The present disclosure relates to a centrifugal compressor and air conditioning equipment. The centrifugal compressor includes: a main shaft; a diffuser, provided with a first thrust bearing at one end away from a diffusion surface; a supporting assembly, provided with a second thrust bearing at one end facing towards the diffuser; and a thrust disk, configured to rotate together with the main shaft, located between the diffuser and the supporting assembly along an axial direction and provided with a thrust portion, a clearance between one side of the thrust portion and the first thrust bearing and a clearance between the other side of the thrust portion and the second thrust bearing being limited through mutual abutting of the diffuser and the supporting assembly.
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公开(公告)号：US20220275976A1
公开(公告)日：2022-09-01
申请号：US17627043
申请日：2020-06-28
发明人： Zhiping Zhang , Wei Zhou , Zhongkeng Long , Chiliang Luo , Haomin Lian , Ningfang Ma
摘要： The present disclosure provides a refrigeration system and a refrigerated storage including the same, relating to the technical field of refrigeration equipment, and solving the technical problems of a high compressor pressure ratio, a reduced refrigeration coefficient and a high exhaust temperature in a refrigerated storage. The refrigeration system includes at least two sets of refrigerant compression devices, a refrigerant evaporation device and a flow path switching valve set, wherein all the refrigerant compression devices are fluidly connected to the flow path switching valve set; the flow path switching valve set is configured to control the refrigerant compression devices by switching the flow path switching valve set to supply a refrigerant to a refrigerant evaporation in an alternative manner or in series. According to the technical solution provided by the present disclosure, double-temperature high-efficiency refrigeration is achieved, and the energy efficiency of the refrigeration system is improved.
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公开(公告)号：US20220268280A1
公开(公告)日：2022-08-25
申请号：US17627001
申请日：2020-06-29
发明人： Hua Liu , Zhiping Zhang , Zhongkeng Long , Rihua Li , Yushi Bi , Xiaokun Wu
摘要： The present disclosure relates to a dual-stage compressor, a control method thereof, and an air conditioning unit. The dual-stage compressor includes a low-pressure stage; a high-pressure stage connected in series with the low-pressure stage; and a volume ratio adjustment mechanism arranged at the high-pressure stage and configured to adjust the volume ratio of refrigerant compression at the high-pressure stage. When the final compression pressure of the compressor is lower or greater than the exhaust pressure, the volume ratio adjustment mechanism is operated to increase or reduce the volume ratio of refrigerant compression at the high-pressure stage so that the final compression pressure of the compressor is equal to the exhaust pressure, and overcompression and undercompression are improved to adapt to changes in external conditions, increase the energy efficiency of the compressor, and reduce the noise of the compressor.
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公开(公告)号：US11365736B2
公开(公告)日：2022-06-21
申请号：US17261203
申请日：2018-12-20
发明人： Yushi Bi , Zhiping Zhang , Zhongkeng Long , Cong Cao , Rihua Li
摘要： The present disclosure is related to a slide valve, a slide valve adjustment mechanism and a screw compressor. The slide valve includes a static slide valve and a moving slide valve, wherein the static slide valve is fixedly installed in a slide valve cavity and provided with an axially-penetrating valve hole; a plurality of bypass holes communicating with the valve hole (110) are formed in the sidewall of the static slide valve, and an exhaust port is formed in the sidewall of one end of the static slide valve. The slide valve may avoid scraping between the slide valve and a screw rotor and the slide valve cavity. Gaps between the slide valve and parts which cooperate with same are reduced, so that the leakage is reduced while the energy efficiency of the compressor is increased.
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公开(公告)号：US11002288B2
公开(公告)日：2021-05-11
申请号：US16466159
申请日：2017-09-25
发明人： Zhiping Zhang , Ruixing Zhong , Nan Jiang , Caiyun Jiang , Yuhui Chen , Zengyue Liu , Liandong Lei , Yi Zhou , Jianfei Liu
摘要： An integrated structure of a return device and a pressure diffuser, and a centrifugal compressor are provided. The structure includes a pressure diffuser portion and a return device portion integrally molded with the pressure diffuser portion. The pressure diffuser portion is configured to form a pressure diffusion flow channel. The return device portion has a return channel. The return channel is in communication with the pressure diffusion flow channel, and is configured to guide gas from the pressure diffusion flow channel. The structure of the present invention eliminates a need of independently installing a return device and a pressure diffuser, and eliminates connection seams caused by assembly and misalignment caused by accumulated errors. Therefore, gas can smoothly flow through the pressure diffusion flow channel into the return channel, such that a gas flow is well guided, and the gas flow uniformity is better.
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公开(公告)号：US10955172B2
公开(公告)日：2021-03-23
申请号：US16195935
申请日：2018-11-20
发明人： Hua Liu , Hongbo Li , Zhiping Zhang , Sheng Wang , Dongjun Sun
摘要： Disclosed is a high-temperature air conditioning device. By changing an arrangement mode of throttle valves, a pressure of refrigerant inside a low-pressure pipeline is made to be lower than a pressure of refrigerant inside a medium-pressure pipeline, thus ensuring that the refrigerant, used for cooling components, inside the low-pressure pipeline has a low pressure, thereby solving a problem in the prior art that a frequency converter, a motor and lubricating oil are not cooled sufficiently or cannot be cooled due to excessively high evaporation pressure.
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