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    FROZEN EVAPORATOR COIL DETECTION AND DEFROST INITIATION
    1.
    发明申请
    FROZEN EVAPORATOR COIL DETECTION AND DEFROST INITIATION 有权
    冷冻蒸发器线圈检测和除霜启动

    公开(公告)号：US20150204589A1

    公开(公告)日：2015-07-23

    申请号：US14418259

    申请日：2013-07-29

    Applicant: Carrier Corporation

    Inventor： Lucy Yi Liu

    IPC: F25B47/02

    CPC classification number: F25B47/02 ,  F25B1/10 ,  F25B41/04 ,  F25B2347/023 ,  F25B2400/13 ,  F25B2700/1933 ,  F25B2700/21161 ,  F25B2700/21171

    Abstract: A method is disclosed or detecting a frozen evaporator coil of a refrigerant vapor compression system for supplying conditioned air to a temperature controlled space before ice build-up on the evaporator coil becomes so excessive as to result in an undesirable on-off cycling of the refrigerant vapor compression system compressor when operating to a frozen temperature maintenance mode. The method may also include initiating a defrost of a frozen evaporator coil of the refrigerant vapor compression system before ice build-up on the evaporator coil becomes so excessive as to result in an on-off cycling of the refrigerant vapor compression system compressor when operating to a frozen temperature maintenance mode.

    Abstract translation: 公开了一种方法，或者检测用于将调节空气供给到温度控制空间的制冷剂蒸气压缩系统的冷冻蒸发器盘管，该冷冻蒸发器盘管在蒸发器盘管上的积冰之前变得过大，导致制冷剂的不期望的开关循环 蒸汽压缩系统压缩机运行到冻结温度维持模式时。 该方法还可以包括在制冷剂蒸气压缩系统的冷冻蒸发器盘管的启动时，在蒸发器盘管上积冰之前的积雪变得过大，从而导致制冷剂蒸气压缩系统压缩机在运行时的开 - 关循环 冷冻温度维持模式。

    Method For Detection Of Loss Of Refrigerant
    7.
    发明申请
    Method For Detection Of Loss Of Refrigerant 有权
    检测制冷剂损失的方法

    公开(公告)号：US20150007591A1

    公开(公告)日：2015-01-08

    申请号：US14376890

    申请日：2013-02-04

    Applicant: Carrier Corporation

    Inventor： Lucy Yi Liu ,  Jian Sun

    IPC: F25B45/00 ,  F25B49/00 ,  G01K13/02

    CPC classification number: F25B45/00 ,  F25B49/00 ,  F25B49/005 ,  F25B2345/003 ,  F25B2400/13 ,  F25B2500/222 ,  F25B2600/024 ,  F25B2600/026 ,  F25B2600/2513 ,  F25B2700/151 ,  F25B2700/171 ,  F25B2700/1931 ,  F25B2700/1933 ,  F25B2700/21151 ,  F25B2700/21152 ,  F25B2700/21172 ,  F25B2700/21173 ,  G01K13/02

    Abstract: A method is provided for detecting in real-time a refrigerant charge loss in a refrigerant vapor compression system. If both a sensed evaporator outlet superheat exceeds a target evaporator outlet superheat by at least a preset amount of superheat and a sensed degree of openness of an electronic expansion valve exceeds a preset degree of openness for a preset time of period, and a sensed air temperature of either a flow of supply air having traversed the evaporator or a flow of return air returning to the evaporator is changing at a rate less than preset air temperature rate of change, a service alarm is generated indicating a loss of charge warning.

    Abstract translation: 提供一种用于实时检测制冷剂蒸汽压缩系统中的制冷剂充量损失的方法。 如果感测到的蒸发器出口过热器超过目标蒸发器出口过热至少预定量的过热，并且电子膨胀阀的感测到的开度大于预设的开启程度超过预设的时间段，并且感测到的空气温度 已经穿过蒸发器的供应空气流或返回到蒸发器的返回空气流以小于预设空气温度变化率的速率变化，产生指示充电警告的损失的服务警报。

    Method for detecting a loss of refrigerant charge of a refrigeration system
    9.
    发明授权
    Method for detecting a loss of refrigerant charge of a refrigeration system 有权

    公开(公告)号：US11022346B2

    公开(公告)日：2021-06-01

    申请号：US15776417

    申请日：2016-11-17

    Applicant: Carrier Corporation

    Inventor： Jian Sun ,  Lucy Yi Liu

    IPC: F25B9/00 ,  F25B1/10 ,  F25B49/02

    Abstract: A method of determining charge loss of a refrigeration system includes the steps of inputting an ambient temperature, a box temperature, and a compressor speed into an electronic controller of the refrigeration system, and calculating a first air side temperature difference across an evaporator by applying an algorithm having a first T-Map representative of normal operating conditions. The controller may then confirm a detection prerequisite is satisfied. Upon confirmation, the controller calculates a second air side temperature difference across the evaporator by applying the algorithm having a second T-Map representative of a loss of refrigerant charge. An action may then be taken from the controller if the first air side temperature difference is less than the second air side temperature difference.

    Transcritical refrigerant vapor compression system high side pressure control
    10.
    发明授权
    Transcritical refrigerant vapor compression system high side pressure control 有权

    公开(公告)号：US10451325B2

    公开(公告)日：2019-10-22

    申请号：US14423254

    申请日：2013-08-20

    Applicant: Carrier Corporation

    Inventor： Jian Sun ,  Lucy Yi Liu

    IPC: F25B49/02 ,  F25B9/00 ,  F25B1/10

    Abstract: Operation of a transcritical refrigerant vapor compression system is controlled, when operating in a high capacity mode, through control of the refrigerant pressure in the refrigerant heat rejection heat exchanger (40) or the compressor (30) discharge pressure, also referred to herein as the high side pressure, so as to optimize energy efficiency. When operating in unloaded low capacity mode, such as for chilling perishable product during temperature maintenance operation, the high side pressure is controlled so that the system can operate in a continuous running mode.

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