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    REFRIGERATION APPARATUS
    1.
    发明申请
    REFRIGERATION APPARATUS 审中-公开

    公开(公告)号：US20190242632A1

    公开(公告)日：2019-08-08

    申请号：US16342351

    申请日：2017-10-17

    申请人： DAIKIN INDUSTRIES, LTD.

    发明人： Satoru SAKAE ,  Takahito NAKAYAMA ,  Takenori MEZAKI

    IPC分类号： F25B49/02

    CPC分类号： F25B49/02 ,  F25B1/00 ,  F25B2500/222 ,  F25B2600/11 ,  F25B2700/1933 ,  F25B2700/21152 ,  F25D11/00 ,  F25D13/00

    摘要： Provided is a refrigeration apparatus that secures safety while suppressing an increase in cost. A refrigeration apparatus performs a refrigeration cycle in a refrigerant circuit including a compressor, a heat source-side heat exchanger, and a usage-side heat exchanger. The refrigeration apparatus comprises a usage-side fan providing an air flow, and a controller. The usage-side fan is disposed in a target space where inside air is cooled. The controller performs a refrigerant leak determination process to determine whether a refrigerant leak occurs, based on a state of a refrigerant in the refrigerant circuit. When the controller performs the refrigerant leak determination process to determine that a refrigerant leak occurs, then the controller performs leakage refrigerant agitation control to operate the usage-side fan so as to suppress local emergence of a region where the refrigerant leaks at a high concentration in the target space.

    REFRIGERATION APPARATUS
    2.
    发明申请
    REFRIGERATION APPARATUS 审中-公开

    公开(公告)号：US20190203997A1

    公开(公告)日：2019-07-04

    申请号：US16329972

    申请日：2017-09-01

    申请人： DAIKIN INDUSTRIES, LTD.

    发明人： Satoru SAKAE ,  Azuma KONDOU ,  Masaaki TAKEGAMI ,  Kazuyoshi NOMURA

    IPC分类号： F25B49/02

    CPC分类号： F25B49/022 ,  F25B1/00 ,  F25B49/02 ,  F25B2500/222 ,  F25B2600/0253 ,  F25B2600/111 ,  F25B2600/2513

    摘要： Provided is a refrigeration apparatus capable of, even in occurrence of a refrigerant leak, suppressing the extent of the refrigerant leak in continuously operating a usage unit other than a usage unit at which the refrigerant leak occurs. When one of a first usage unit and a second usage unit connected in parallel via a liquid-refrigerant connection pipe and a gas-refrigerant connection pipe is in a refrigerant leak situation satisfying a predetermined condition, a controller closes an on-off valve of a leak unit, the on-off valve being disposed on the side of the liquid-refrigerant connection pipe with respect to a usage-side heat exchanger, continues to open an on-off valve of a non-leak unit, the on-off valve being disposed on the side of the liquid-refrigerant connection pipe with respect to a usage-side heat exchanger, and reduces a refrigerant pressure at a portion on the side of the liquid-refrigerant connection pipe with respect to each on-off valve below a refrigerant pressure at the portion at a time when the refrigerant leak situation satisfies the predetermined condition.

    Electrochemical compressor refrigeration appartus with integral leak detection system
    4.
    发明授权
    Electrochemical compressor refrigeration appartus with integral leak detection system 有权

    公开(公告)号：US10024590B2

    公开(公告)日：2018-07-17

    申请号：US15418851

    申请日：2017-01-30

    申请人： Xergy Inc.

    发明人： Bamdad Bahar

    IPC分类号： F25B49/00 ,  F25B31/00 ,  F25B49/02 ,  C25B9/00

    CPC分类号： F25B49/005 ,  C25B9/00 ,  F04B39/121 ,  F25B31/00 ,  F25B41/02 ,  F25B49/022 ,  F25B2500/222

    摘要： An electrochemical compressor system, such as an electrochemical refrigeration system includes a sealed vessel that reduces leak issues related to the electrochemical cell. The sealed vessel may be molded or formed from a polymer or a composite polymer having reinforcing materials, such as fibers therein. The sealed vessel may be plated with metal to reduce gas permeation through the wall of the vessel and to accommodate and improve the attachment of conduits, including metal conduits thereto. A metal conduit may be brazed onto a vessel and the brazing material may be selected for polymer to metal joining and for reduced contamination potential of the system. The electrochemical compressor system incorporates a leak sensor configured at least partially within the sealed rigid vessel that measures the pressure within the vessel.

    AIR CONDITIONING MACHINE
    6.
    发明申请
    AIR CONDITIONING MACHINE 审中-公开

    公开(公告)号：US20180142931A1

    公开(公告)日：2018-05-24

    申请号：US15576207

    申请日：2016-06-29

    申请人： DAIKIN INDUSTRIES, LTD.

    发明人： Motoki TAKAGI

    IPC分类号： F25B49/02 ,  F25B9/00 ,  F25B1/04

    CPC分类号： F25B49/022 ,  F24F11/36 ,  F25B1/04 ,  F25B9/004 ,  F25B13/00 ,  F25B41/04 ,  F25B49/005 ,  F25B49/02 ,  F25B2400/12 ,  F25B2500/222 ,  F25B2600/2519

    摘要： An air conditioning machine is provided by which a refrigerant collected into an outdoor heat exchanger can be suppressed from counter-flowing through a discharge hole of a compressor toward a side of an indoor heat exchanger in a refrigerant circuit after an end of a pump down operation. The air conditioning machine includes a refrigerant circuit, a refrigerant leakage sensing unit that senses leakage of the flammable refrigerant from the refrigerant circuit, and a pump down operation control unit that carries out the pump down operation for accumulating the flammable refrigerant in the outdoor heat exchanger in the refrigerant circuit when the refrigerant leakage sensing unit senses the leakage of the flammable refrigerant. The compressor includes a cylinder chamber, a compression member that is placed in the cylinder chamber and that compresses the flammable refrigerant, and a discharge hole through which the flammable refrigerant compressed in the cylinder chamber is discharged. At the end of the pump down operation, the pump down operation control unit controls the compressor so that the compression member stops at a position where the compression member overlaps at least a portion of the discharge hole when viewed in an axial direction of the cylinder chamber.

    REFRIGERATION CYCLE APPARATUS AND REFRIGERATION CYCLE SYSTEM
    7.
    发明申请
    REFRIGERATION CYCLE APPARATUS AND REFRIGERATION CYCLE SYSTEM 审中-公开

    公开(公告)号：US20180094844A1

    公开(公告)日：2018-04-05

    申请号：US15534725

    申请日：2015-11-27

    申请人： Mitsubishi Electric Corporation

    发明人： Yasuhiro SUZUKI

    IPC分类号： F25B49/02 ,  F25B49/00

    CPC分类号： F25B49/02 ,  F25B13/00 ,  F25B49/005 ,  F25B2313/027 ,  F25B2313/02741 ,  F25B2313/0293 ,  F25B2500/222

    摘要： Provided is a refrigeration cycle apparatus including: a refrigeration cycle configured to circulate refrigerant; a heat exchanger unit configured to accommodate at least a heat exchanger of the refrigeration cycle; and a controller configured to control the heat exchanger unit, in which: the heat exchanger unit includes: an air-blowing fan; and a refrigerant detection unit configured to detect a concentration of leaked refrigerant and to output a detection signal to the controller; and the controller is configured to operate the air-blowing fan when detecting leakage of the refrigerant, and to stop the air-blowing fan triggered by becoming positive from negative of a temporal change of the concentration of the leaked refrigerant.

    METHOD OF AND SYSTEM FOR DETECTING LOSS OF REFRIGERANT CHARGE
    10.
    发明申请
    METHOD OF AND SYSTEM FOR DETECTING LOSS OF REFRIGERANT CHARGE 审中-公开

    公开(公告)号：US20170219262A1

    公开(公告)日：2017-08-03

    申请号：US15014286

    申请日：2016-02-03

    申请人： Lennox Industries Inc.

    发明人： LiYing Guo ,  David Omlor

    IPC分类号： F25B45/00 ,  F24F11/00

    CPC分类号： F24F11/30 ,  F24F11/36 ,  F24F11/62 ,  F24F2140/20 ,  F25B13/00 ,  F25B49/005 ,  F25B2313/0314 ,  F25B2313/0315 ,  F25B2500/222 ,  F25B2700/2106 ,  F25B2700/21152

    摘要： A method of determining loss of refrigerant charge in a heating, ventilation, and air conditioning (HVAC) system. The method includes receiving, using a controller, a plurality of temperature values from a plurality of temperature sensors placed at multiple locations within the HVAC system and calculating, using the controller using the plurality of temperature values, a plurality of temperature-dependent values. The method further includes determining, using the controller, whether a first temperature-dependent value of the plurality of temperature-dependent values is above a first predetermined temperature value and responsive to a determination that the first temperature-dependent value is above the first predetermined temperature value, transmitting, using the controller to a user interface, a notification indicating that the HVAC system is operating with low refrigerant charge.