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    METHOD AND APPARATUS FOR DETECTING LOW REFRIGERANT CHARGE
    61.
    发明申请
    METHOD AND APPARATUS FOR DETECTING LOW REFRIGERANT CHARGE 有权
    用于检测低制冷剂充电的方法和装置

    公开(公告)号：US20020121100A1

    公开(公告)日：2002-09-05

    申请号：US09798315

    申请日：2001-03-02

    发明人： Roy M. Yabuki ,  Derek Y. Kamemoto ,  Virender Jain ,  Richard L. Kenyon

    IPC分类号： F25B045/00 ,  F25B001/00

    CPC分类号： F25B49/005 ,  F25B49/027 ,  F25B2341/0653 ,  F25B2500/222 ,  F25B2600/21 ,  F25B2700/195 ,  F25B2700/197 ,  F25B2700/21174 ,  F25B2700/21175 ,  Y02B30/72

    摘要： Apparatus for detecting low charge of a working fluid in a heat transfer system of the type having a fluid circuit comprising a compressor for pressurizing working fluid received from an evaporator, a condenser and condenser fan for cooling the working fluid received from the compressor, and an expansion device for controlling flow of the working fluid between the condenser and the evaporator, the apparatus comprising: a working fluid state sensor operative in response to a control signal and disposed in the fluid circuit on the outlet side of the evaporator to produce a working fluid state signal; and a control circuit for providing the control signal to the sensor and for controlling operation of the heat transfer system based on a comparison of the working fluid state signal with a state set point; the control circuit detecting a low charge condition of the working fluid when the state signal indicates the working fluid superheat exceeds a first predetermined threshold over a first predetermined time with the expansion device in a fully open condition.

    摘要翻译： 用于检测在具有流体回路的传热系统中的低工作流体的装置，该流体回路包括用于对从蒸发器接收的工作流体加压的压缩机，用于冷却从压缩机接收的工作流体的冷凝器和冷凝器风扇， 膨胀装置，用于控制冷凝器和蒸发器之间的工作流体的流动，该装置包括：工作流体状态传感器，其响应于控制信号而工作并且设置在蒸发器出口侧的流体回路中，以产生工作流体 状态信号; 以及控制电路，用于根据所述工作流体状态信号与状态设定点的比较，向所述传感器提供所述控制信号并控制所述传热系统的操作; 当所述状态信号指示所述工作流体过热时，所述控制电路在所述膨胀装置处于完全打开状态的情况下，在第一预定时间内超过第一预定阈值时，检测所述工作流体的低充电状态。

    Refrigerant loss detection
    63.
    发明授权
    Refrigerant loss detection 失效
    制冷剂损失检测

    公开(公告)号：US06330802B1

    公开(公告)日：2001-12-18

    申请号：US09510703

    申请日：2000-02-22

    申请人： Robert W. Cummings ,  Thien D. Ta

    发明人： Robert W. Cummings ,  Thien D. Ta

    IPC分类号： F25B4902

    CPC分类号： B60H1/00978 ,  B60H1/3225 ,  F25B49/005 ,  F25B2500/222 ,  F25B2700/195 ,  F25B2700/21174 ,  F25B2700/21175

    摘要： A method for detecting a low level of refrigerant circulating through a motor vehicle refrigerant circuit having a compressor (12), a condenser (14), an evaporator (16), and an accumulator (18), includes detecting a partial loss of a refrigerant fluid by measuring the temperature difference of the refrigerant fluid between an evaporator inlet and an evaporator outlet. The method further includes detecting a complete loss of refrigerant by measuring the pressure of the refrigerant in the liquid phase between the condenser (14) and the evaporator (16). The temperature and pressure measurements are converted to engineering units and then compared to predetermined engineering units that correspond to separate ranges of ambient temperatures for determining the if the refrigerant level is low.

    摘要翻译： 一种用于检测通过具有压缩机（12），冷凝器（14），蒸发器（16）和蓄能器（18）的机动车辆制冷剂回路循环的低水平制冷剂的方法，包括检测制冷剂的部分损失 流体，通过测量蒸发器入口和蒸发器出口之间的制冷剂流体的温差。 该方法还包括通过测量在冷凝器（14）和蒸发器（16）之间的液相中的制冷剂的压力来检测制冷剂的完全损失。 将温度和压力测量值转换为工程单位，然后与对应于单独的环境温度范围的预定工程单位进行比较，以确定制冷剂水平是否低。

    Incrementally adjustable electronic expansion valve
    66.
    发明授权
    Incrementally adjustable electronic expansion valve 失效
    增量式电子膨胀阀

    公开(公告)号：US4523436A

    公开(公告)日：1985-06-18

    申请号：US564543

    申请日：1983-12-22

    申请人： John W. Schedel ,  Richard G. Lord

    发明人： John W. Schedel ,  Richard G. Lord

    IPC分类号： F25B1/00 ,  F25B41/06 ,  G05D23/20 ,  F25B41/04 ,  F16K31/02

    CPC分类号： F25B41/062 ,  F25B2341/0653 ,  F25B2700/21174 ,  F25B2700/21175 ,  Y02B30/72 ,  Y10S251/90

    摘要： An incrementally adjustable electronic expansion valve for precisely controlling refrigerant flow through the valve is disclosed. Basically, the expansion valve includes a stepper motor, a sleeve member, and an orifice assembly. The sleeve member is incrementally moved over a slot(s) in the orifice assembly by operation of the stepper motor to control refrigerant flow between an inlet and an outlet of an expansion valve. A control system provides electronic digital control signals to the stepper motor to control operation of the motor in response to superheat of refrigerant flowing from an evaporator to a compressor of the refrigeration system. The electronic expansion valve may also include sealing means to substantially prevent refrigerant flow through the valve when the sleeve member is in its fully closed position.

    摘要翻译： 公开了一种用于精确控制通过阀门的制冷剂流量的可递增调节的电子膨胀阀。 基本上，膨胀阀包括步进马达，套筒构件和孔组件。 套筒构件通过步进电机的操作在孔组件中的槽上逐渐移动以控制膨胀阀的入口和出口之间的制冷剂流动。 控制系统向步进电机提供电子数字控制信号，以响应于从蒸发器流到制冷系统的压缩机的制冷剂的过热来控制电动机的运行。 电子膨胀阀还可以包括当套筒构件处于其完全关闭位置时基本上防止制冷剂流过阀的密封装置。