Refrigerant loss detection
    1.
    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

    IPC分类号: F25B4902

    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。

    Temperature control using infrared sensing
    2.
    发明授权
    Temperature control using infrared sensing 失效
    使用红外感测的温度控制

    公开(公告)号:US06840053B2

    公开(公告)日:2005-01-11

    申请号:US10351585

    申请日:2003-01-27

    摘要: A system and method for sensing and controlling the temperature of a heating, ventilation and air conditioning (HVAC) system utilizes an infrared sensor. The infrared sensor is used to detect temperature over several different areas on an evaporator surface on which a cold spot may occur. More preferably, the infrared sensor continuously scans the whole surface on the air outlet side of the evaporator. The sensed temperature is used to detect any cold spots that may dynamically form on the evaporator surface. The system is controlled in response to the detected temperature.

    摘要翻译: 用于感测和控制加热,通风和空调(HVAC)系统的温度的系统和方法利用红外传感器。 红外传感器用于检测蒸发器表面上可能发生冷点的几个不同区域的温度。 更优选地,红外传感器连续地扫描蒸发器的出气侧的整个表面。 感测到的温度用于检测可能在蒸发器表面上动态形成的任何冷点。 响应于检测到的温度来控制系统。