The invention relates to a method (500) for defrosting an external heat exchanger (18) of a refrigeration device (10) of a motor vehicle, said external heat exchanger operating as an air heat pump evaporator, said refrigeration device (10) comprising: a refrigerant compressor (12) which can be or is connected to a main line (14) and a secondary line (16); an external heat exchanger (18) arranged in the main line (14); an evaporator (22) arranged in the main line (14); a heating regulator (26) arranged in the secondary line (16); a main line valve (A4) arranged between the refrigerant compressor (12) and the external heat exchanger, which is closed during operation of the air heat pump; a secondary line valve (A3) arranged between the refrigerant compressor (12) and the heating regulator (26), which opens during operation of the air heat pump; wherein the method comprises the steps of: closing (S502) the secondary line valve (A3); opening (S503) the main line valve (A4) such that the refrigerant flows directly from the refrigerant compressor (12) to the external heat exchanger (18); the inlet-side pressure level of the refrigerant on the external heat exchanger (18) is adjusted (S504) to a target pressure corresponding to a condensation temperature (Tkond) of the refrigerant in the following range: 2 DEG C < = Tkond < = 20 DEG C, in particular 4 DEG C < = Tkond < = 10 DEG C.

    本发明涉及一种用于对机动车的制冷设备(10)的作为空气热泵蒸发器运行的外部换热器(18)进行除霜的方法(500),其中,制冷设备(10)具有:制冷剂压缩机(12),其与主管线(14)和次级管线(16)能连接或连接;布置在主管线(14)中的外部换热器(18);布置在主管线(14)中的蒸发器(22);布置在次级管线(16)中的加热调节器(26);布置在制冷剂压缩机(12)与外部换热器之间的主管线阀(A4),其在空气热泵运行中关闭;布置在制冷剂压缩机(12)与加热调节器(26)之间的次级管线阀(A3),其在空气热泵运行中打开;其中,该方法包括以下步骤:关闭(S502)次级管线阀(A3);打开(S503)主管线阀(A4),使得制冷剂直接从制冷剂压缩机(12)流向外部换热器(18);将制冷剂在外部换热器(18)上的入口侧压力水平调节(S504)到如下目标压力,该目标压力相当于制冷剂在下列范围内的冷凝温度(Tkond):2℃≤Tkond≤20℃,特别是4℃≤Tkond≤10℃。


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    Titel :

    Method for defrosting external heat exchanger of refrigeration device of motor vehicle, said external heat exchanger operating as air heat pump, refrigeration device, and motor vehicle having such refrigeration device


    Weitere Titelangaben:

    对机动车制冷设备的作为空气热泵运行的外部换热器除霜的方法、制冷设备和具有这种制冷设备的机动车


    Beteiligte:

    Erscheinungsdatum :

    2022-11-04


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht



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