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公开(公告)号：US20180066871A1
公开(公告)日：2018-03-08
申请号：US15559598
申请日：2016-03-28
发明人： Noriyuki MATSUKURA , Kenji UEDA , Naoki KOBAYASHI , Ryosuke SUEMITSU , Norihisa HORAGUCHI , Satoru OKAMOTO , Yoshio NISHIGUCHI
CPC分类号： F25B1/10 , C09K5/04 , C09K5/041 , C09K5/044 , C09K5/045 , C09K2205/126 , F04D17/12 , F25B1/053 , F25B43/003 , F25B45/00 , F25B2400/13
摘要： An object of the present invention is to provide a refrigerant circulation device and method that can suppress acid generation caused by decomposition of a refrigerant containing an HFO or HCFO. The refrigerant circulation device has a compressor, a condenser, expansion valves and an evaporator connected by a main pipe to form a refrigerant circulation circuit through which a refrigerant is circulated, the refrigerant circulation circuit being filled with a refrigerant containing a hydrofluoroolefin or a hydrochlorofluoroolefin having a carbon-carbon double bond within the molecular structure, wherein the refrigerant circulation device includes a drive that drives the compressor via a speed increaser, and a drive cooling unit that cools the drive with the refrigerant condensed in the condenser, and a desiccant that can trap moisture is disposed in the evaporator or the drive cooling unit.
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2.发明公开公开(公告)号：US20230259111A1
公开(公告)日：2023-08-17
申请号：US18010630
申请日：2021-07-12
发明人： Yuki NISHIZAKI , Satoshi NIKAIDO , Noriyuki MATSUKURA , Tatsuo ISHIGURO , Katsuaki MORITA , Ryuji IKEDA , Hirotaka OKA , Kenichi NAGAHARA
CPC分类号： G05B23/0243 , F25B49/027 , F25B49/022
摘要： The purpose of the present invention is to provide an abnormality detection system and refrigerator, an abnormality detection method, and an abnormality detection program which can improve the accuracy of abnormality detection. The abnormality detection system comprises: an acquisition unit which acquires driving data of a refrigerator (11); a creation unit which creates a model capable of estimating a prescribed driving state of the refrigerator (11) on the basis of the driving data, when the driving data is non-trained data; a determination unit which compares an estimation value of the driving state, the estimation value being estimated by the model, with an actual measurement value corresponding to the driving state, and determines whether the driving data is an outlier; and an abnormality detection unit which performs, on the basis of the model, abnormality detection on the refrigerator (11), when the driving data is not determined to be the outlier.
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公开(公告)号：US20220136744A1
公开(公告)日：2022-05-05
申请号：US17523239
申请日：2021-11-10
IPC分类号： F25B31/00 , F04D29/058 , F04D25/06 , F04D17/12 , F04D29/056 , F04D29/58 , F16C37/00 , F16C33/04 , F16C33/10 , F25B1/053 , F04D17/10 , F04D25/02 , F04D29/053 , F04D29/063 , F04D29/28 , F25B31/02 , F25B43/00
摘要： A turbo chiller that has an oil-free configuration, which reduces the frequency of maintenance and maintenance-induced release of refrigerant, and can achieve a reduced environmental impact by utilizing the characteristics of the low-pressure refrigerant R1233zd(E) that reaches negative pressure at a saturation temperature of 18° C. or lower. The turbo chiller comprises a refrigeration cycle that includes a turbo compressor, a condenser, a decompression device, and an evaporator connected in sequence via piping and is filled with a refrigerant; wherein the refrigerant is a low-pressure refrigerant R1233zd(E) refrigerant with low global warming potential and low ozone depletion potential; the turbo compressor has a direct drive configuration in which a rotating shaft of impellers is directly joined to a motor; and the rotating shaft is supported by magnetic bearings.
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公开(公告)号：US20180209709A1
公开(公告)日：2018-07-26
申请号：US15574612
申请日：2016-06-30
摘要： This refrigerating machine is equipped with: a turbocompressor which compresses a refrigerant; a condenser which is equipped with one or more pipe groups configured from a plurality of heat transfer pipes through which cooling water flows, and condenses the refrigerant compressed by the turbocompressor; an expansion valve which causes the refrigerant condensed by the condenser to expand; an evaporator which causes the refrigerant expanded by the expansion valve to evaporate; a temperature sensor which detects cooling water exit temperature, which is the temperature of the cooling water flowing from at least one of the heat transfer pipes constituting the pipe group(s); and a control unit which determines, on the basis of the detection temperature of the temperature sensor, air bleeding start conditions for starting an air bleeding operation to bleed and discharge air to the outside.
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公开(公告)号：US20180135893A1
公开(公告)日：2018-05-17
申请号：US15571075
申请日：2016-08-04
发明人： Naoya MIYOSHI , Kenji UEDA , Noriyuki MATSUKURA
CPC分类号： F25B1/053 , F25B1/10 , F25B41/04 , F25B2400/075 , F25B2400/121 , F25B2400/13 , F25B2400/23 , F25B2500/01 , F25B2600/021 , Y02B30/741
摘要： The purpose of the present invention is to install an economizer having a sufficient internal volume in a compact turbo refrigeration apparatus specifically using a low-pressure refrigerant, and reduce refrigerant pressure loss and enhance efficiency in the turbo refrigeration apparatus. The turbo refrigeration apparatus according to the present invention comprises: a turbo compressor which compresses a refrigerant; a condenser which condenses the compressed refrigerant; a control valve which causes the condensed refrigerant to expand; an evaporator which causes the expanded refrigerant to evaporate; and an economizer which is installed in such a manner as to be sandwiched between the condenser and the evaporator, and separates the refrigerant expanded by the control valve into gas and liquid. The economizer is installed adjacent to a curved wall, having a drum shell shape, of the condenser and/or the evaporator, the curved wall being shared with the structural wall of the economizer. The economizer has a height (H) greater than the maximum width (W) thereof when viewed in the longitudinal direction thereof.
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公开(公告)号：US20180347860A1
公开(公告)日：2018-12-06
申请号：US15780844
申请日：2017-02-09
发明人： Kazuki WAJIMA , Noriyuki MATSUKURA , Kenji UEDA , Naoki KOBAYASHI , Ryosuke SUEMITSU , Yoshinori AKAMATSU , Fuyuhiko SAKYU , Kanako OSAFUNE , Masanori TAMURA , Hiroyuki SUDA , Junji MIZUKADO , Kenji TAKIZAWA , Liang CHEN , Heng-dao QUAN
摘要： An object of the present invention is to provide a heat source machine that can reduce the environmental load and can output the thermal energy with high temperature, and a method for operating the heat source machine. A heat source machine of the present invention includes a centrifugal compressor, condensers, expansion valves, and an evaporator, in which a refrigerant enclosed in a refrigerant circulation circuit configured by sequentially connecting the centrifugal compressor, the condensers, the expansion valves, and the evaporator contains a composition A, a composition B, or a composition C, the composition A has 4 or 5 carbon atoms, 6 or more fluorine atoms, and one or more oxygen atoms, the composition B has 4 or 5 carbon atoms and 6 or more fluorine atoms, the composition C has 3 carbon atoms, 2 chlorine atoms, 3 fluorine atoms, and an intramolecular double bond, and the composition A, the composition B, or the composition C has a boiling point of 20° C. or more and a critical temperature of 180° C. or more.
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公开(公告)号：US20180187932A1
公开(公告)日：2018-07-05
申请号：US15736130
申请日：2016-09-06
CPC分类号： F25B39/00 , F22B37/30 , F25B1/00 , F25B1/053 , F25B39/02 , F25B2339/0242 , F25B2341/0662 , F25B2400/13 , F25B2400/23 , F28C1/16 , F28D1/04 , F28D7/16 , F28D7/1607 , F28D7/1646 , F28F9/02 , F28F9/0278 , F28F9/028 , F28F9/24 , F28F2009/226
摘要： Provided is an evaporator capable of, in a centrifugal chiller using a low pressure refrigerant used at a maximum pressure of less than 0.2 MPaG, preventing dry-out of a group of heat transfer pipes in an evaporator to increase heat transfer performance and to suppress reduced efficiency due to carryover of the low pressure refrigerant in a liquid phase to a turbo compressor side and a centrifugal chiller provided with same. An evaporator (7) comprises a pressure container (21) into which a refrigerant is compressed and introduced, a refrigerant inlet (22) provided on a lower portion of the pressure container, a refrigerant outlet (23) provided on an upper portion of the pressure container, a group of heat transfer pipes (25) that exchange heat with the refrigerant through the interior of the pressure container and a tabular refrigerant distribution plate (26) installed between the refrigerant inlet and the group of heat transfer pipes and in which refrigerant flow holes (26a) are drilled. The surface ratio of the refrigerant flow holes per unit area on the refrigerant distribution plate in an area (A1) corresponding to a position near the upstream side of the group of heat transfer pipes is greater than that in another area (A2).
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公开(公告)号：US20170146271A1
公开(公告)日：2017-05-25
申请号：US15322014
申请日：2015-07-27
IPC分类号： F25B31/00 , F04D29/28 , F04D29/053 , F04D29/058 , F25B43/00 , F04D29/063 , F04D29/58 , F25B1/053 , F25B31/02 , F04D17/10 , F04D25/02
摘要： A turbo chiller that has an oil-free configuration, which reduces the frequency of maintenance and maintenance-induced release of refrigerant, and can achieve a reduced environmental impact by utilizing the characteristics of the low-pressure refrigerant R1233zd(E) that reaches negative pressure at a saturation temperature of 18° C. or lower. The turbo chiller comprises a refrigeration cycle that includes a turbo compressor, a condenser, a decompression device, and an evaporator connected in sequence via piping and is filled with a refrigerant; wherein the refrigerant is a low-pressure refrigerant R1233zd(E) refrigerant with low global warming potential and low ozone depletion potential; the turbo compressor has a direct drive configuration in which a rotating shaft of impellers is directly joined to a motor; and the rotating shaft is supported by magnetic bearings.
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公开(公告)号：US20190017730A1
公开(公告)日：2019-01-17
申请号：US16065918
申请日：2017-02-02
摘要： A refrigerating machine which is equipped with: a turbocompressor 2 that compresses a refrigerant; a condenser 3 that condenses the refrigerant compressed by the turbocompressor 2; an intermediate cooler 4 that is a plate heat exchanger which performs heat exchange between the liquid refrigerant introduced from the condenser 3 and the two-phase refrigerant obtained by expanding, with a sub-expansion valve 13, part of the liquid refrigerant introduced from the condenser 3; a main expansion valve 5 that expands the liquid refrigerant introduced from the intermediate cooler 4; and an evaporator 7 that evaporates the refrigerant introduced from the main expansion valve 5. The plate heat exchanger includes 80 or more laminated plates, the width of which is 100-400 mm and the height of which is 300-1000 mm.
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公开(公告)号：US20180252233A1
公开(公告)日：2018-09-06
申请号：US15756622
申请日：2017-01-12
IPC分类号： F04D29/58 , F04D29/056 , F04D29/62 , F25B1/053 , F04D29/052
CPC分类号： F04D29/5806 , F04D17/122 , F04D29/052 , F04D29/056 , F04D29/057 , F04D29/059 , F04D29/62 , F16C17/02 , F16C17/22 , F16C19/163 , F16C21/00 , F16C33/103 , F16C33/1045 , F16C35/10 , F16C35/12 , F16C2360/44 , F25B1/053
摘要： The object of the present invention is to suppress a mechanical loss caused by thermal elongation or rotational vibration of a rotary shaft of a turbo compressor for compressing a low pressure refrigerant used at a maximum pressure of less than 0.2 MPaG so as to enhance the efficiency of a turbo chilling apparatus. The turbo compressor is a turbo compressor for compressing a low pressure refrigerant used at a maximum pressure of less than 0.2 MPaG, the turbo compressor including: a rotary shaft; an electric motor coaxially disposed on an intermediate portion of the rotary shaft so a to rotationally drive the rotary shat impellers fixed to one end of the rotary shaft and forming a compression portion; a first bearing pivotally sporting the rotary shaft between the electric motor and the impellers; and a second bearing pivotally supporting the other end of the rotary shaft, wherein the first bearing is formed of a rolling bearing, and the second bearing is formed of a sliding bearing.
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