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公开(公告)号：US10858951B2
公开(公告)日：2020-12-08
申请号：US14784821
申请日：2014-04-09
发明人： Yasushi Hasegawa , Kenji Ueda , Akimasa Yokoyama
IPC分类号： F01D11/20 , F04D29/058 , F04D29/051 , F04D29/46 , F04D29/048 , F04D29/041 , F04D29/042 , F04D29/052
摘要： The purpose of the present invention is to provide: a turbo compressor which is provided with an open impeller and has the minimal gap between the shroud and the impeller such that efficiency is improved and the safe operating region is enlarged; and a turbo chiller using the same. The turbo compressor is provided with an open impeller with a shroud provided on the side of a casing, and the rotary shaft is supported by a radial magnetic bearing and a magnetic thrust bearing. The turbo compressor is provided with a control unit that comprises: a load calculating means that calculates the axial thrust load generated by the pressure distribution of the compressor; and an axial support position control means that controls a gap between the impeller and the shroud to be a target gap by varying, on the basis of the axial thrust load, the axial support position of the rotary shaft due to the magnetic thrust bearing.
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公开(公告)号：US10465959B2
公开(公告)日：2019-11-05
申请号：US14914519
申请日：2014-10-23
摘要： A heat pump device and an organic Rankine cycle device that are capable of maintaining a stable thermal cycle even when an HFO or HCFO is used as the refrigerant. The refrigerant circulation device uses a refrigerant, wherein the refrigerant includes a hydrofluoroolefin or hydrochlorofluoroolefin having a carbon-carbon double bond within the molecular structure, and a reaction suppression unit which suppresses an isomerization reaction of the refrigerant is provided within the refrigerant circulation circuit.
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公开(公告)号：US10174986B2
公开(公告)日：2019-01-08
申请号：US15024616
申请日：2014-11-05
摘要： The present invention has an object to suppress an overshoot in the outlet temperature of a heat medium. A heat source machine controlling apparatus includes a computing unit and a set temperature changing unit. The computing unit calculates a load change rate using a predetermined arithmetic expression. The set temperature changing unit determines whether or not the load change rate calculated by the computing unit exceeds a predetermined threshold value. In the case where the load change rate exceeds the predetermined threshold value, the set temperature changing unit changes a set chilled water outlet temperature so as to suppress a change in a chilled water outlet temperature. For example, in the case where the chilled water outlet temperature is on a falling trend, if the set chilled water outlet temperature is set to a relatively high value, the heat source machine load decreases, and the chilled water outlet temperature is controlled to coincide with the set chilled water outlet temperature after the change. Consequently, an overshoot can be suppressed.
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公开(公告)号：US10139815B2
公开(公告)日：2018-11-27
申请号：US15107363
申请日：2015-02-24
发明人： Takaaki Miura , Kenji Ueda , Yoshie Kanki , Minoru Matsuo
IPC分类号： G05B23/02 , F25B1/10 , F25B25/00 , F25B40/02 , F25B41/04 , F25B49/02 , F25B1/053 , F25B31/02 , F25B49/00
摘要： This chiller control device (74) is provided with: a storage unit (18) which stores operation data detected at each site in a turbo chiller; a compression unit (34) which, when the size of the operation data accumulated over time in the storage unit (18) becomes too large, converts the operation data each time a condition depending on the type of operation data is met, thereby compressing the data size; and a diagnostic unit (36) which evaluates the state of the turbo chiller on the basis of the operation data converted by the compression unit (34). By this means, the state of the chiller can be diagnosed without increasing the storage capacity of the storage medium that stores operation data of the turbo chiller.
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公开(公告)号：US10126028B2
公开(公告)日：2018-11-13
申请号：US15505380
申请日：2015-08-20
发明人： Naoya Miyoshi , Kenji Ueda , Yasushi Hasegawa
摘要： This turbo chiller includes a shell-and-tube condenser; a header along a length direction of a shell is installed on a refrigerant inlet of the condenser, and openings are formed at least on both end portions of the header in the length direction, which allows high-temperature and high-pressure refrigerant gas from a compressor to be smoothly and evenly distributed to both length-direction end areas in the shell of the condenser through the header.
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公开(公告)号：US09856885B2
公开(公告)日：2018-01-02
申请号：US14768326
申请日：2014-02-13
IPC分类号： F04D29/063 , F25B1/053 , F04D29/42 , F25B31/00 , F04D29/58
CPC分类号： F04D29/063 , F04D29/4206 , F04D29/584 , F04D29/5853 , F25B1/053 , F25B31/002 , F25B2500/16
摘要： Provided is an oil tank of a turbo chiller compressor whose heater can be replaced or checked without removing oil from an oil tank and removing refrigerant from a turbo chiller, and a turbo chiller compressor. An oil tank (10) of a turbo chiller compressor (3A) includes a bottom plate (11) and side plates (12, 13) standing upright so as to extend upward from an outer peripheral edge portion of the bottom plate (11). The oil tank (10) forms a bottom portion of a casing (14) forming the turbo chiller compressor (3A), a through-hole (21) is formed so as to penetrate the side plate (12) in a plate thickness direction, a protective tube (22) closed at a tip end thereof is inserted into the through-hole (21), and a rod-shaped heater (26) configured to be able to be pulled out from the protective tube (22) and be inserted into the protective tube (22) is inserted into the protective tube (22).
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公开(公告)号：US11441821B2
公开(公告)日：2022-09-13
申请号：US16489622
申请日：2018-06-28
发明人： Ryosuke Suemitsu , Kenji Ueda , Yasushi Hasegawa , Kazuki Wajima , Yoshinori Akamatsu , Fuyuhiko Sakyu , Kanako Osafune
摘要： It is an object of the present invention to provide a heat pump that can use, as a refrigerant, a substance with which a geometric isomer exists, and a method for designing the same. The present invention is a method for designing a heat pump (1) whose closed circuit configured by connecting a compressor (2), a condenser (3), an expansion valve (4), and an evaporator (5) in this order is filled with a refrigerant containing a refrigerant substance with which a geometric isomer may exist, the method including obtaining an upper limit of stable temperature at which isomerization of the refrigerant substance does not proceed, and setting an upper limit usage temperature of the heat pump (1) so as not to exceed the upper limit of the stable temperature.
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公开(公告)号：US11774146B2
公开(公告)日：2023-10-03
申请号：US16982934
申请日：2019-03-19
发明人： Yasushi Hasegawa , Kenji Ueda , Shintaro Omura
IPC分类号： F25B1/053 , F04D29/058 , F25B9/06
CPC分类号： F25B1/053 , F04D29/058 , F25B9/06
摘要： Provided are a turbo compressor and a centrifugal chiller comprising the same with which the length of a shaft in an axial direction can be shortened, rotational shake accompanying rotation of the shaft is suppressed, and a device can be made small. A turbo compressor comprising: a compressor part which compresses refrigerant; a shaft (15) which drives the compressor part around an axis of rotation X; a magnetic bearing (30A) which has provided thereto an iron core part (32) comprising a plurality of teeth parts (34) formed at equiangular intervals around the axis of rotation X, and, a plurality of coils (36) respectively wound around the plurality of teeth parts (34), and said magnetic bearing (30A) allows the shaft (15) to pass through and supports said shaft (15) without contacting the same; an auxiliary bearing which allows the shaft (15) to pass through; and a displacement sensor (50) which detects displacement of the shaft (15), wherein the displacement sensor (50) is provided between neighboring coils (36).
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公开(公告)号：US10571190B2
公开(公告)日：2020-02-25
申请号：US15538094
申请日：2015-12-24
发明人： Toyotaka Hirao , Kenji Ueda , Yasushi Watanabe
摘要： A liquefied gas cooling apparatus including: a gas flow path for carrying a liquefied gas that is liquefied by cooling; and a refrigeration unit including a refrigerating cycle formed by an evaporator for cooling the liquefied gas flowing through the gas flow path, a compressor, a condenser, and a throttle expansion unit. The compressor is driven through an electric motor contained in a sealed housing together with a compressor mechanism.
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公开(公告)号：US10408500B2
公开(公告)日：2019-09-10
申请号：US15571075
申请日：2016-08-04
发明人： Naoya Miyoshi , Kenji Ueda , Noriyuki Matsukura
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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