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风冷热泵的除霜控制方法
(1) 较早采用的是定时除霜控制，这种控制往往按照最恶劣的环境条件来设定时间，因此在不同的环境条件下必然产生不必要的能源浪费。
(1) Timed defrosting control was used earlier, and this control is often set according to the worst environmental conditions, so unnecessary energy waste will inevitably occur in different environmental conditions.
(2) 时间温度控制方法，这是目前普遍采用的方法，通过在时间量的基础上考虑了温度量，比单纯的时间法有进步，同时部分地考虑了机组工作环境的影响,但是仍不能很好地反映热泵机组在各种工况下公道除霜的题目。
(2) Time and temperature control method, which is widely used at present, is more advanced than the simple time method by considering temperature on the basis of time. At the same time, the influence of unit working environment is partially considered, but it still can not well reflect the problem of fair defrosting of heat pump unit under various working conditions.
(3) 通过吸气管上的吸气压力可以得到饱和蒸发温度，当在蒸发器表面结霜严重时，蒸发温度与大气温度的差会加大，以饱和蒸发温度与环境温度的差值能较好的反映结霜情况，但是对于环境温度变化剧烈的场合仍会有误动作产生。
(3) The saturated evaporation temperature can be obtained by the suction pressure on the suction pipe. When the surface of the evaporator is frosted seriously, the difference between the evaporation temperature and the atmospheric temperature will increase. The difference between the saturated evaporation temperature and the ambient temperature can better reflect the frosting situation, but there will still be miscarriage of production when the ambient temperature changes dramatically. Life.
(4) 由于蒸发器表面结霜，会增大蒸发器两侧的空气压差，通过检测蒸发器两侧的空气压差来确定是否需要除霜，这种方法可以实现根据需要除霜，但在蒸发器表面有异物或严重积灰时会误动作，而且微压差传感器的价格较高。
(4) Because of the frosting on the evaporator surface, the air pressure difference on both sides of the evaporator will be increased. The air pressure difference on both sides of the evaporator can be detected to determine whether defrosting is needed. This method can be used to defrost the evaporator according to the need, but it will malfunction when there is foreign matter on the surface of the evaporator or serious ash accumulation, and the price of the micro-pressure sensor is higher.
(5) 以上的方法由于参变量较少，只能适用于某些工况，而在另一些工况时会产生误操纵。可以通过引进参数如环境温度、环境湿度、翅片盘管表面温度( 或通过压力传感器得到盘管蒸发温度) 、制热运行时间、翅片盘管表面温度与环境温度的差值( 或盘管蒸发温度与环境温度的差值) 及翅片盘管温度的变化率( 或盘管蒸发温度的变化率) 等来综合考虑以达到降低不必要除霜的误动作。
(5) The above method can only be applied to some working conditions because of its few parameters, but it will lead to misoperation in other working conditions. Parameters such as ambient temperature, ambient humidity, finned coil surface temperature (or evaporation temperature from pressure sensors), heating operation time, finned coil surface temperature and ambient temperature difference (or the difference between evaporation temperature and ambient temperature) and finned coil temperature change rate (or coil). Comprehensive consideration should be taken to reduce the unnecessary action of defrosting.
(1) Timed defrosting control was used earlier, and this control is often set according to the worst environmental conditions, so unnecessary energy waste will inevitably occur in different environmental conditions.
(2) 时间温度控制方法，这是目前普遍采用的方法，通过在时间量的基础上考虑了温度量，比单纯的时间法有进步，同时部分地考虑了机组工作环境的影响,但是仍不能很好地反映热泵机组在各种工况下公道除霜的题目。
(2) Time and temperature control method, which is widely used at present, is more advanced than the simple time method by considering temperature on the basis of time. At the same time, the influence of unit working environment is partially considered, but it still can not well reflect the problem of fair defrosting of heat pump unit under various working conditions.
(3) 通过吸气管上的吸气压力可以得到饱和蒸发温度，当在蒸发器表面结霜严重时，蒸发温度与大气温度的差会加大，以饱和蒸发温度与环境温度的差值能较好的反映结霜情况，但是对于环境温度变化剧烈的场合仍会有误动作产生。
(3) The saturated evaporation temperature can be obtained by the suction pressure on the suction pipe. When the surface of the evaporator is frosted seriously, the difference between the evaporation temperature and the atmospheric temperature will increase. The difference between the saturated evaporation temperature and the ambient temperature can better reflect the frosting situation, but there will still be miscarriage of production when the ambient temperature changes dramatically. Life.
(4) 由于蒸发器表面结霜，会增大蒸发器两侧的空气压差，通过检测蒸发器两侧的空气压差来确定是否需要除霜，这种方法可以实现根据需要除霜，但在蒸发器表面有异物或严重积灰时会误动作，而且微压差传感器的价格较高。
(4) Because of the frosting on the evaporator surface, the air pressure difference on both sides of the evaporator will be increased. The air pressure difference on both sides of the evaporator can be detected to determine whether defrosting is needed. This method can be used to defrost the evaporator according to the need, but it will malfunction when there is foreign matter on the surface of the evaporator or serious ash accumulation, and the price of the micro-pressure sensor is higher.
(5) 以上的方法由于参变量较少，只能适用于某些工况，而在另一些工况时会产生误操纵。可以通过引进参数如环境温度、环境湿度、翅片盘管表面温度( 或通过压力传感器得到盘管蒸发温度) 、制热运行时间、翅片盘管表面温度与环境温度的差值( 或盘管蒸发温度与环境温度的差值) 及翅片盘管温度的变化率( 或盘管蒸发温度的变化率) 等来综合考虑以达到降低不必要除霜的误动作。
(5) The above method can only be applied to some working conditions because of its few parameters, but it will lead to misoperation in other working conditions. Parameters such as ambient temperature, ambient humidity, finned coil surface temperature (or evaporation temperature from pressure sensors), heating operation time, finned coil surface temperature and ambient temperature difference (or the difference between evaporation temperature and ambient temperature) and finned coil temperature change rate (or coil). Comprehensive consideration should be taken to reduce the unnecessary action of defrosting.
