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公开(公告)号：US11175078B2
公开(公告)日：2021-11-16
申请号：US16466210
申请日：2017-09-21
Applicant: FUJITSU GENERAL LIMITED
Inventor： Takashi Kimura , Kazuki Suda
Abstract: In an air conditioner, an inlet pipe penetrates a location that is offset towards an outer circumferential side from an apex portion of a top portion. The suction pipe penetrates a location that is offset towards the outer circumferential side from an apex portion of a bottom portion and is inserted into the interior of the main body portion, and the suction inner pipe, which constitutes a portion of the suction pipe that lies in the interior of the main body portion, extends as far as an upper portion of the main body portion so that an inlet port is disposed in a space defined by the top portion. Then, the suction inner pipe includes a bend portion that is bent from a location lying slightly above a location where the suction pipe penetrates the bottom portion as an originating point.
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公开(公告)号：US09651294B2
公开(公告)日：2017-05-16
申请号：US14198974
申请日：2014-03-06
Applicant: FUJITSU GENERAL LIMITED
Inventor： Takashi Kimura , Kuniko Hayashi
CPC classification number: F25D21/004 , F24F1/06 , F24F11/30 , F24F11/41 , F24F11/42 , F24F2110/12
Abstract: An outdoor unit of an air conditioner includes: an outdoor fan; an outdoor air temperature detector; and a controller, wherein the controller performs: a fan defrost operation to circulate the refrigerant in the same order as in the case of a cooling operation and rotate the outdoor fan when the outdoor air temperature is within a predetermined temperature range, a fan defrost operation over a period of a first fan defrost operation time when the outdoor air temperature is lower than a first predetermined temperature, and a fan defrost operation over a period of a second fan defrost operation time that is longer than the first fan defrost operation time when the outdoor air temperature is equal to or higher than a second predetermined temperature that is higher than the first predetermined temperature.
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3.发明授权公开(公告)号：US10197317B2
公开(公告)日：2019-02-05
申请号：US14903744
申请日：2014-01-22
Applicant: FUJITSU GENERAL LIMITED
Inventor： Takashi Kimura , Kuniko Hayashi
Abstract: An outdoor unit control unit has a defrosting operation condition table that defines an activation rotational speed based on the total sum of the rated capacity of indoor units and a refrigerant pipe length that is the length of a liquid pipe or of a gas pipe. The outdoor unit control unit uses the total sum of the rated capacity of the indoor units and refers to the defrosting operation condition table, so as to determine the activation rotational speed, and then the outdoor unit control unit activates a compressor at the determined activation rotational speed when starting a defrosting operation, maintains this activation rotational speed for a predetermined time (one minute) from the start of the defrosting operation, and drives the compressor.
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公开(公告)号：US10041714B2
公开(公告)日：2018-08-07
申请号：US14909997
申请日：2014-01-22
Applicant: FUJITSU GENERAL LIMITED
Inventor： Takashi Kimura , Kuniko Hayashi
CPC classification number: F25B49/022 , F24F11/30 , F25B13/00 , F25B41/046 , F25B47/025 , F25B2313/005 , F25B2313/0314 , F25B2313/0315 , F25B2600/0253 , F25B2700/1931 , F25B2700/1933 , F25B2700/2106 , F25B2700/21151 , F25B2700/21152 , Y02B30/741
Abstract: A rotational speed Cr of a compressor 21 during a defrosting operation is controlled within a control range that corresponds to a capacity ratio P, a total sum Pi of rated capacity of an indoor unit, or a refrigerant pipe length Lr. Accordingly, even in the case where a refrigerant circulation amount during the defrosting operation is reduced due to an installation state of an air conditioner 1, it is possible to prevent suction pressure from being significantly reduced and falling below a performance lower limit value of the compressor 21. Thus, damage to the compressor 21 can be prevented. In addition, it is possible to prevent a case where the suction pressure falls below the performance lower limit value of the compressor 21 and thus low-pressure protection control is executed. Therefore, a case where the restoration of the heating operation is delayed does not occur.
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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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Patent Agency Ranking
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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公开(公告)号：US20150040592A1
公开(公告)日：2015-02-12
申请号：US14198974
申请日：2014-03-06
Applicant: FUJITSU GENERAL LIMITED
Inventor： Takashi Kimura , Kuniko Hayashi
IPC: F25D21/00
CPC classification number: F25D21/004 , F24F1/06 , F24F11/30 , F24F11/41 , F24F11/42 , F24F2110/12
Abstract: An outdoor unit of an air conditioner includes: an outdoor fan; an outdoor air temperature detector; and a controller, wherein the controller performs: a fan defrost operation to circulate the refrigerant in the same order as in the case of a cooling operation and rotate the outdoor fan when the outdoor air temperature is within a predetermined temperature range, a fan defrost operation over a period of a first fan defrost operation time when the outdoor air temperature is lower than a first predetermined temperature, and a fan defrost operation over a period of a second fan defrost operation time that is longer than the first fan defrost operation time when the outdoor air temperature is equal to or higher than a second predetermined temperature that is higher than the first predetermined temperature.
Abstract translation: 空调的室外机包括：室外风扇; 室外空气温度检测器; 以及控制器，其中所述控制器执行：风扇除霜操作，以与制冷操作相同的顺序循环制冷剂，并且当室外空气温度在预定温度范围内时旋转室外风扇，风扇除霜操作 在室外空气温度低于第一规定温度的第一风扇除霜运转时间的期间，以及比第一风扇除霜运转时间长的第二风扇除霜运转时间的风扇除霜运转时间 室外空气温度等于或高于高于第一预定温度的第二预定温度。
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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：US09951983B2
公开(公告)日：2018-04-24
申请号：US15021179
申请日：2014-01-22
Applicant: FUJITSU GENERAL LIMITED
Inventor： Takashi Kimura , Kuniko Hayashi
CPC classification number: F25B47/025 , F24F3/065 , F24F11/42 , F24F11/64 , F24F11/70 , F24F11/85 , F25B49/02 , F25B2313/006 , F25B2313/0233 , F25B2313/0293 , F25B2313/0294 , F25B2313/0314 , F25B2313/0315 , F25B2600/025 , F25B2700/00 , F25B2700/1931 , F25B2700/1933 , F25B2700/21151 , F25B2700/21152
Abstract: An outdoor unit control unit 200 has a defrosting operation condition table 300a that defines an activation rotational speed Cr in accordance with a total sum of flow rate coefficients Cva that is a total sum of flow rate coefficients Cv representing capacities of indoor expansion valves 52a to 52c. The outdoor unit control unit 200 calculates the total sum of the flow rate coefficients Cva by adding the flow rate coefficient Cv of each of the indoor expansion valves 52a to 52c, and refers to the defrosting operation condition table 300a, so as to determine the activation rotational speed Cr. Then, the outdoor unit control unit 200 activates a compressor 21 at the determined activation rotational speed Cr when starting a defrosting operation, maintains this activation rotational speed Cr for a predetermined time from the start of the defrosting operation, and drives the compressor 21.
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