行业应用

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    制冷机架/机组和过程冷却装置

    Danfoss制冷专用型变频器防护等级可达IP65/66(选项),以确保应用于严苛环境和高等级清洁过程。内置回油管理功能可确保油流回流至曲轴箱,从而显著提高了系统可靠性。该功能可根据工况以不同方式自启。

    压缩机专用功能可在头端压力达到临界值之前及时降容,以确保制冷系统稳定运行,最大限度延长系统正常运行时间,保证食品安全。变频器可使压缩机在短暂停电时仍继续运行,确保食品安全和过程连续性。

    智能逻辑控制器可实现多活塞式压缩机或螺杆式压缩机容量的智能控制,提高 COP。 

    冷凝器和蒸发器/空气处理设备

    VLT® Refrigeration Drive 具有调节冷凝温度的功能,能够根据环境温度和货物负荷的变化情况自动降低冷凝温度,或提升蒸发器温度,优化 COP。这种功能可提高冷却性能,降低功耗,优化制冷系统性能,并缓解压缩机的磨损。

    Danfoss变频器根据过程需要减低蒸发器风扇的速度,以提升空气控制性能,节约能源,降低损耗,提高制冷设备冷藏水果、蔬菜和肉制品等易腐物品的冷藏性能。

    Danfoss制冷专用型变频器内置四个带有独立反馈和给定值的PID 控制器。该特性可在无需外部控制器的前提下,在对驱动器连接的蒸发器风扇电机进行闭环控制之外,对三个外部装置(如阻尼器、阀门和其他外部设备)采用闭环控制,从而有效降低实际成本。

    Danfoss 变频器能够处理传感器的逻辑规则与输入,实时功能和与时间相关的操作。因此,变频器能够控制许多功能,如周末和工作日运行切换,温度控制和带监控的串级P-PI

    自动能量优化(AEO)可另外节省最多5%的能量。此功能可将输入电流与电动机实际速度和负载相匹配,仅消耗电动机励磁及以该负载运行所必需的功率。这将避免电动机中出现更多热损失。

    Danfoss变频器效率值最高可达99%,功率因数大于0.9。该指标已考虑额定状态下电抗器和滤波器的损失。这不仅可降低变频器自身的直接能量成本,而且还可以降低制冷或热排放相关成本。

    采用变频驱动控制可在管道泄漏或断裂时,仍确保连续供水或乙二醇。例如,通过降低变频器速度来防止过载,以较低流量保证供应。

    如果泵虽在运行但未达到所要求的压力,如管道泄漏,则Danfoss变频器可利用其干式泵保护和曲线临界值功能启动报警、关闭泵或者执行其他预先设置的操作。

    通过对风机/泵系统进行流量补偿,可以大幅节能并降低安装成本。安装在风机或泵附近的压力传感器提供了一个参考值,这可使系统排放末端的压力保持恒定。变频器不断调节压力参考值,以跟从系统曲线。

    一般情况下,对于正在运行的泵,根据泵和应用设计确定的曲线,运行速度越快,耗能将越大。变频器的无流量/低流量功能可检测泵快速运转但未满载的情况。这可能表明水循环停止、泵干转或管道泄漏。该功能可在管道泄漏或断裂时,仍确保连续供应液体。例如,通过降低变频器速度来防止过载,以较低流量保证供应。

    自动能量优化(AEO)可另外节省最多5%的能量。此功能可将输入电流与电动机实际速度和负载相匹配,仅消耗电动机励磁及以该负载运行所必需的功率。这将避免电动机中出现更多热损失。

    Danfoss变频器效率值最高可达99%,功率因数大于0.9。该指标已考虑额定状态下电抗器和滤波器的损失。这不仅可降低变频器自身的直接能量成本,而且还可以降低制冷或热排放相关成本。

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