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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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公开(公告)号：US20200080756A1
公开(公告)日：2020-03-12
申请号：US16498281
申请日：2018-03-05
摘要： The purpose of the present invention is to provide a refrigeration machine wherein lubricating oil supplied to a bearing, etc. in a turbo compressor is capable of being cooled by a simple configuration. This refrigeration machine (1) comprises: a refrigeration cycle in which a refrigerant circulates, the refrigeration cycle being provided with a turbo compressor (2) having a compression mechanism driven by a motor, the refrigeration cycle being further provided with a condenser (3) and an evaporator (8); an oil tank (23) in which lubricating oil is stored; a lubricating oil supply line (22) for supplying lubricating oil from the oil tank (23) into a motor housing (31) containing the motor; and a liquid refrigerant supply line (24) for supplying a refrigerant from the condenser (3) into the motor housing (31).
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公开(公告)号：US10443899B2
公开(公告)日：2019-10-15
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
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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公开(公告)号：US10408518B2
公开(公告)日：2019-09-10
申请号：US15574612
申请日：2016-06-30
IPC分类号： F25B49/02 , F25B1/00 , F25B43/04 , F25B47/00 , F25B49/00 , F25B25/00 , F25B1/053 , F25B39/04
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：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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