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    • 2. 发明授权
    • Determining method of high pressure of refrigeration cycle apparatus
    • 制冷循环装置高压确定方法
    • US06854283B2
    • 2005-02-15
    • US10658421
    • 2003-09-10
    • Kazuo NakataniYoshikazu KawabeNoriho OkazaYuji InoueAkira Hiwata
    • Kazuo NakataniYoshikazu KawabeNoriho OkazaYuji InoueAkira Hiwata
    • F25B1/00F25B9/00F25B9/06F25B11/02F25B13/00F25B40/00F28B9/00
    • F25B9/008F25B9/06F25B13/00F25B40/00F25B2309/061F25B2400/04F25B2600/17F25B2600/2501
    • It is an object of the present invention to reduce the constraint that the density ratio is constant as small as possible, and to obtain high power recovering effect in a wide operation range by using an expander which is operated in accordance with a flowing direction of refrigerant. A determining method of a high pressure of a refrigeration cycle apparatus in which a refrigeration cycle uses carbon dioxide as refrigerant and has a compressor, an outdoor heat exchanger, an expander and an indoor heat exchanger, and the refrigeration cycle including a bypass circuit provided in parallel to said expander, and a control valve which adjusts a flow rate of refrigerant flowing through said bypass circuit, said compressor being driven by power recover by said expander, wherein if an optimal high pressure of a first refrigeration cycle flowing through said expander and a second refrigeration cycle flowing through said bypass circuit is defined as Ph, and a bypass amount ratio flowing through said bypass circuit in said Ph is defined as Rb0, and a maximum refrigeration cycle efficiency of said first refrigeration cycle in said Ph is defined as COPe, and a maximum refrigeration cycle efficiency of said second refrigeration cycle in said Ph is defined as COPb, the optimal high pressure Ph which maximizes (1−Rb0)×COPe+Rb0×COPb is determined.
    • 本发明的一个目的是减小密度比恒定的约束尽可能小,并且通过使用根据制冷剂的流动方向操作的膨胀机在宽的运行范围内获得高功率回收效果 。 一种制冷循环装置的高压确定方法,其中制冷循环使用二氧化碳作为制冷剂,并具有压缩机,室外热交换器,膨胀机和室内热交换器,并且制冷循环包括设置在旁路回路 平行于所述膨胀机的调节阀,调节流过所述旁通回路的制冷剂的流量的控制阀,所述压缩机由所述膨胀机的功率回收驱动,其中如果流过所述膨胀机的第一制冷循环的最佳高压和 流过所述旁路回路的第二制冷循环被定义为Ph,并且流过所述Ph中的所述旁路回路的旁路量比定义为Rb0,并且将所述Ph中的所述第一制冷循环的最大制冷循环效率定义为COPe, 并且所述Ph中的所述第二制冷循环的最大制冷循环效率被定义为COPb,最佳的高 确定使(1-Rb0)xCOPe + Rb0xCOPb最大化的h压力Ph。
    • 5. 发明申请
    • ROTARY COMPRESSOR
    • 旋转式压缩机
    • US20140099218A1
    • 2014-04-10
    • US14124494
    • 2012-06-06
    • Akira HiwataTakeshi Ogata
    • Akira HiwataTakeshi Ogata
    • F04C28/24F04C18/46
    • F04C18/46F04C18/356F04C23/008F04C28/24F04C28/26F04C29/12F04C29/128
    • A rotary compressor 100 of the present invention includes a compression mechanism 3, a motor 2, a suction path 14, a communication passage 16 and an on-off valve 32 as a control mechanism 30. The rotary compressor 100 further includes an interior space 28, a first check valve 35a and a second check valve 35b. If the on-off valve 32 opens, a volume of the operation chamber 25 is reduced and with this reduction in the volume, the first check valve 35a opens. Pressure in the operation chamber 25 does not rise. At this time, the rotary compressor 100 is operated with substantially zero suction volume. If the on-off valve 32 is closed, the rotary compressor 100 is operated with a normal suction volume.
    • 本发明的旋转压缩机100包括作为控制机构30的压缩机构3,电动机2,吸入路径14,连通路16和开关阀32.旋转式压缩机100还具有内部空间28 第一止回阀35a和第二止回阀35b。 如果开关阀32打开,则操作室25的容积减小,并且随着体积的减小,第一止回阀35a打开。 操作室25中的压力不升高。 此时,旋转式压缩机100的吸入体积基本为零。 如果开关阀32关闭,则旋转式压缩机100以正常抽吸量运转。
    • 10. 发明申请
    • ROTARY COMPRESSOR
    • 旋转式压缩机
    • US20130343942A1
    • 2013-12-26
    • US14004041
    • 2012-02-23
    • Takeshi OgataYu ShiotaniAkira HiwataHiroshi Hasegawa
    • Takeshi OgataYu ShiotaniAkira HiwataHiroshi Hasegawa
    • F01C21/18
    • F04C28/26F04C18/3564F04C23/001F04C23/008F04C28/08F04C2240/403
    • A rotary compressor (100) includes a compression mechanism (3), a motor (2), a suction path (14), a back-pressure chamber (18), a return path (16), an inverter (42), and a controller (44). A check valve (73) of a reed valve type for opening and closing a return port (3c) of the compression mechanism (3) is disposed in the back-pressure chamber (18). The return path (16) functions to return a working fluid to the suction path (14) from the back-pressure chamber (18). A volume-varying valve (17) is provided in the return path (16). The volume-varying valve (17) allows the working fluid to flow through the return path (16) when the suction volume of the compression mechanism (3) should be set relatively small, and precludes the working fluid from flowing through the return path (16) to increase the pressure in the back-pressure chamber (18) when the suction volume of the compression mechanism (3) should be set relatively large.
    • 旋转式压缩机100包括压缩机构3,马达2,吸入路14,背压室18,返回通路16,逆变器42和 控制器(44)。 用于打开和关闭压缩机构(3)的返回口(3c)的簧片阀类型的止回阀(73)设置在背压室(18)中。 返回路径(16)用于从背压室(18)将工作流体返回到吸入路径(14)。 在返回路径(16)中设置有体积变化阀(17)。 当压缩机构(3)的吸入容积应相对较小时,容积变化阀(17)允许工作流体流过返回路径(16),并且排除工作流体流过返回路径( 16),当压缩机构(3)的吸入容积应相对较大时,增加背压室(18)中的压力。