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公开(公告)号：US10088209B2
公开(公告)日：2018-10-02
申请号：US13733738
申请日：2013-01-03
Applicant: Fujitsu General Limited
Inventor： Keito Kawai , Hideya Tamura , Takahiro Matsunaga , Shinju Watanabe , Takashi Kimura , Kotaro Toya , Yasuhiro Oka , Ken Nakashima
Abstract: An air conditioner 1 of the embodiment of the present invention, when all compressors 21a-21c have been stopping for a given time or more, starts an air conditioning operation without performing pressure equalizing control in switch units 6a-6d with starting the operation of the air conditioner 1. Also, when the stopping time of all compressors 21a-21c is less than the given time, the air conditioner 1 performs the pressure equalizing control by controlling switch units 6a-6d with starting the operation of the air conditioner 1. In this case, when the stopping time reaches the given time during execution of the pressure equalizing processing control, the pressure equalizing processing control being executed is stopped and the air conditioning operation is started.
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公开(公告)号：US11125473B2
公开(公告)日：2021-09-21
申请号：US16485283
申请日：2018-02-05
Applicant: FUJITSU GENERAL LIMITED
Inventor： Hideya Tamura , Shinju Watanabe , Shinya Asano , Takashi Kimura , Kotaro Toya , Yoshiki Tanaka , Yuki Watanabe
Abstract: There is provided an air conditioner capable of displaying sufficient cooling ability in each indoor unit by allowing a sufficient amount of refrigerant to flow into indoor units where cooling ability cannot be displayed. By executing refrigerant amount balance control, since degrees of opening of indoor expansion valves are narrowed in indoor units whose refrigerant superheating degrees are smaller than an average refrigerant superheating degree, amounts of refrigerant flowing into the indoor expansion valves are decreased. In the indoor unit where the refrigerant superheating degree is higher than the average refrigerant superheating degree, since refrigerant pressure on a downstream side of the indoor expansion valve is also decreased due to the degrees of opening of the indoor expansion valves being narrowed, the difference in pressure between the upstream side and the downstream side of the indoor expansion valve increases and an amount of refrigerant flowing into the indoor unit is increased.
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公开(公告)号：US09909784B2
公开(公告)日：2018-03-06
申请号：US14681299
申请日：2015-04-08
Applicant: FUJITSU GENERAL LIMITED
Inventor： Kotaro Toya , Makoto Shimotani , Hideya Tamura , Takahiro Matsunaga , Shinju Watanabe , Koji Ogata , Masaki Arai , Yasuhiro Oka , Ken Nakashima , Toshihiro Takahashi , Masakazu Sato
CPC classification number: F25B5/04 , F25B13/00 , F25B2313/006 , F25B2313/0231 , F25B2313/0233 , F25B2313/0252 , F25B2313/0253 , F25B2313/02742 , F25B2313/029
Abstract: An outdoor unit of an air conditioner coupled to an indoor unit by a liquid pipe and a gas pipe, includes: a compressor; an outdoor heat exchanger; a discharge pipe coupled to a refrigerant discharge side of the compressor; an intake pipe coupled to a refrigerant intake side of the compressor; an outdoor-unit high-pressure gas pipe coupled to the discharge pipe; an outdoor-unit low-pressure gas pipe coupled to the intake pipe; an outdoor-unit liquid pipe that couples a first refrigerant entry/exit opening of the outdoor heat exchanger and the liquid pipe together; a bypass pipe coupled to the outdoor-unit liquid pipe; a first flow-passage switcher coupled to a second refrigerant entry/exit opening of the outdoor heat exchanger, the discharge pipe, the intake pipe, and the bypass pipe; and a second flow-passage switcher coupled to the gas pipe, the outdoor-unit high-pressure gas pipe, and the outdoor-unit low-pressure gas pipe.
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Patent Agency Ranking
公开(公告)号：US20140026603A1
公开(公告)日：2014-01-30
申请号：US13943098
申请日：2013-07-16
Applicant: FUJITSU GENERAL LIMITED
Inventor： Kotaro Toya , Hideya Tamura , Takahiro Matsunaga , Shinju Watanabe , Takashi Kimura , Yasuhiro Oka , Ken Nakashima
IPC: F25B49/02
CPC classification number: F24F11/022 , F24F1/0003 , F24F1/06 , F24F3/065 , F24F11/30 , F24F11/72 , F24F11/83 , F24F2110/00 , F24F2140/12 , F24F2140/20 , F25B49/02
Abstract: An outdoor unit for an air-conditioning apparatus includes an outdoor heat exchanger; a compressor; a refrigerant pipe configured to couple the outdoor heat exchanger and the compressor with an indoor unit including an indoor heat exchanger; and a control unit that determines whether the heating capacity of the indoor unit performing a heating operation is decreased by the refrigerant stagnated in the indoor heat exchanger.
Abstract translation: 一种空气调节装置的室外机，具备室外热交换器， 压缩机 制冷剂配管，其将室外热交换器和压缩机与包括室内热交换器的室内机连接; 以及控制单元，其通过停滞在室内热交换器中的制冷剂来确定进行制热运转的室内机的加热能力是否降低。
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公开(公告)号：US20140007601A1
公开(公告)日：2014-01-09
申请号：US13933608
申请日：2013-07-02
Applicant: FUJITSU GENERAL LIMITED
Inventor： Hideya Tamura , Takahiro Matsunaga , Shinju Watanabe , Keito Kawai , Takashi Kimura , Kotaro Toya , Yasuhiro Oka , Ken Nakashima
IPC: F25B29/00
CPC classification number: F25B29/003 , F24F1/20 , F24F1/46 , F24F11/30 , F24F11/62 , F24F2110/12 , F24F2140/12
Abstract: An outdoor unit for an air-conditioning apparatus includes: a compressor; an outdoor fan; a plurality of outdoor heat exchangers coupled to a plurality of indoor units; a switching member configured to switch functions of the outdoor heat exchangers to either condensers or evaporators by switching of coupling states between the compressor and the outdoor heat exchangers; and a control unit configured to calculate a low pressure saturation temperature during a cooling operation or a cooling-main operation, and configured to cause all of the plurality of outdoor heat exchangers to serve as condensers by controlling the switching member when a state in which an open-air temperature is lower than the low pressure saturation temperature continues for a predetermined time.
Abstract translation: 一种空气调节装置的室外机，具备：压缩机; 户外风扇 耦合到多个室内单元的多个室外热交换器; 开关构件，其通过切换压缩机和室外热交换器之间的联接状态来将室外热交换器的功能切换到冷凝器或蒸发器; 以及控制单元，被配置为在制冷操作或冷却主操作期间计算低压饱和温度，并且被配置为当所述多个室外热交换器中的 露天温度低于低压饱和温度持续预定时间。
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公开(公告)号：US09739521B2
公开(公告)日：2017-08-22
申请号：US13733697
申请日：2013-01-03
Applicant: Fujitsu General Limited
Inventor： Keito Kawai , Hideya Tamura , Takahiro Matsunaga , Shinju Watanabe , Takashi Kimura , Kotaro Toya , Yasuhiro Oka , Ken Nakashima
CPC classification number: F25D21/06 , F25B13/00 , F25B31/004 , F25B43/043 , F25B47/025 , F25B2313/0231 , F25B2313/0253 , F25B2313/02532 , F25B2313/027 , F25B2313/0314 , F25B2313/0315 , F25B2700/1931 , F25B2700/1933 , F25B2700/2104 , F25B2700/2106 , F25B2700/21151 , F25B2700/21152
Abstract: When the temperatures of outdoor heat exchangers 23a and 23b detected by outdoor heat exchanger temperature sensors 57a and 57b become equal to or higher than 5 degrees C. and the sucking superheating degrees of compressors 21a and 21b become equal to or lower than 0 degrees C. while an air conditioning apparatus 1 is performing the reverse defrosting operation, the reverse defrosting operation is stopped and the heating dominant operation is resumed. At this time, the total operating times of the compressors 21a and 21b are reset. The sucking superheating degrees of the compressors 21a and 21b are obtained by subtracting the low pressure saturation temperatures calculated from the sucking pressures of the compressors 21a and 21b, from the temperatures of the refrigerants sucked into the compressors 21a and 21b which temperatures are detected by the sucking temperature sensors 54a and 54b.
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公开(公告)号：US09518755B2
公开(公告)日：2016-12-13
申请号：US13943098
申请日：2013-07-16
Applicant: FUJITSU GENERAL LIMITED
Inventor： Kotaro Toya , Hideya Tamura , Takahiro Matsunaga , Shinju Watanabe , Takashi Kimura , Yasuhiro Oka , Ken Nakashima
CPC classification number: F24F11/022 , F24F1/0003 , F24F1/06 , F24F3/065 , F24F11/30 , F24F11/72 , F24F11/83 , F24F2110/00 , F24F2140/12 , F24F2140/20 , F25B49/02
Abstract: An outdoor unit for an air-conditioning apparatus includes an outdoor heat exchanger; a compressor; a refrigerant pipe configured to couple the outdoor heat exchanger and the compressor with an indoor unit including an indoor heat exchanger; and a control unit that determines whether the heating capacity of the indoor unit performing a heating operation is decreased by the refrigerant stagnated in the indoor heat exchanger.
Abstract translation: 一种空气调节装置的室外机，具备室外热交换器， 压缩机 制冷剂配管，其将室外热交换器和压缩机与包括室内热交换器的室内机连接; 以及控制单元，其通过停滞在室内热交换器中的制冷剂来确定进行制热运转的室内机的加热能力是否降低。
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公开(公告)号：US09175890B2
公开(公告)日：2015-11-03
申请号：US13933608
申请日：2013-07-02
Applicant: FUJITSU GENERAL LIMITED
Inventor： Hideya Tamura , Takahiro Matsunaga , Shinju Watanabe , Keito Kawai , Takashi Kimura , Kotaro Toya , Yasuhiro Oka , Ken Nakashima
CPC classification number: F25B29/003 , F24F1/20 , F24F1/46 , F24F11/30 , F24F11/62 , F24F2110/12 , F24F2140/12
Abstract: An outdoor unit for an air-conditioning apparatus includes: a compressor; an outdoor fan; a plurality of outdoor heat exchangers coupled to a plurality of indoor units; a switching member configured to switch functions of the outdoor heat exchangers to either condensers or evaporators by switching of coupling states between the compressor and the outdoor heat exchangers; and a control unit configured to calculate a low pressure saturation temperature during a cooling operation or a cooling-main operation, and configured to cause all of the plurality of outdoor heat exchangers to serve as condensers by controlling the switching member when a state in which an open-air temperature is lower than the low pressure saturation temperature continues for a predetermined time.
Abstract translation: 一种空气调节装置的室外机，具备：压缩机; 户外风扇 耦合到多个室内单元的多个室外热交换器; 开关构件，其通过切换压缩机和室外热交换器之间的联接状态来将室外热交换器的功能切换到冷凝器或蒸发器; 以及控制单元，被配置为在制冷操作或冷却主操作期间计算低压饱和温度，并且被配置为当所述多个室外热交换器中的 露天温度低于低压饱和温度持续预定时间。
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