冷冻式干燥机是利用冷冻原理制成的压缩空气除水净化设备，来自管网上游含有大量饱和水汽的压缩空气经过冷却处理后，绝大部分水蒸汽冷凝成液态水滴，经气水分离后被除去，所获的干燥压缩空气能够满足绝大部分工业的需要，与吸附式干燥机不同的是，冷冻式干燥机在除水过程中，能顺便除去压缩空气中的一部分油雾。它对压缩空气的前置预处理要求没吸附式干燥机那样严格。冷冻干燥机由于工作可靠、管理方便、运行费用低廉而成为各行业空压站房净化设备的首选机种。

    Refrigerated compressed air dryer is a water removing and purification device ,which use the principle of refrigerating. Saturated compressed air coming from upstream Pipe is cooled .Most condensated water is drained after being seperated with gas .Dried compressed air then can meet most industrial requirements. Compared to desiccant absorptive compressed air dryer , refrigerated one can remove part of the oil mist in compressed air ,and  requirment for lead pretreatment is not as strict as desiccant one . For its reliabilty 、convenient management and loww cost , it becomes a first choice for purification equipment in air compressor station in various industries .

   冷冻式干燥机本质上是一种热交换设备，任何型式的冷冻式干燥机都是由空气热交换系统、制冷系统、气水分离系统及电气控制系统等部分组成。制冷系统由冷媒压缩机、蒸发器、冷凝器及节流组件（毛细管或膨胀阀）等组成。含有大量水蒸汽的压缩空气主要在蒸发器里完成汽—液冷凝相变，在气水分离器里完成液态水的凝聚与排出。从而获得干燥的压缩空气。所以制冷系统的工作状况直接决定了冷冻式干燥机的运行情况，而气水分离器的结构与效率对成品气的干燥程度（用压力露点来表示）有至关重要的影响。空气热交换器的设计关系到冷冻式干燥机的节能运行，并使压缩空气成品气不致于在机器出口管道内结露。

    Essentially , it is a kind of heat exchanger device . All types are composed by air heat exchanger 、refrigerating system 、condensator and Throttling components ( capillary 、expansion valve) . Gas and liquid state exchange is mainly realized in condensator where liquid water condensate before being drained . Therefore , working condition of refrigerating system directly decide the dryer’s working condition , while the structure and efficiency of gas liquid separator affect the dew point of outlet compressed air . Design of air heat exchanger affect the dryer’s energy saving operation ,and also prevent the outlet compressed air from moisture condensation

    按制冷系统中冷凝器工作时的冷却方式的不同，冷冻式干燥机可分为风冷式与水冷式两种。

Classified by refrigerating way of condensator in refrigerating system , there are two types of refrigerated compressed air dryers : water cooled and wind cooled .

    当进气温度过高时，饱和水蒸汽含量急剧升高，此时必须对进气预先降温后才能进入冷干机的制冷系统。通常在冷干机前增加后部冷却器，当进气温度≥45℃时可选用本公司高温型冷干机。

When inlet air temperature is too high , saturated water mist content will increase sharply . On this case , inlet air must be Cooled before entering dryer .Usually a after cooler is needed before dryer ,users can choose high temperature refrigerated compressed air dryer if the inlet air is not less than 45℃ ,.

    冷干机主要由三大部分构成：气路系统、制冷系统、电气控制系统

Refrigerated compressed air dryer is mainly composed by three parts: Pneumatic system 、refrigeration system、electric control system
1. Pneumatic system is mainly composed by air-air heat exchanger 、condensator and gas liquid separator .

（1）空气－空气换热器air-air heat exchanger

本公司提供空气换热器采用板翅式换热器。

HOLYSUN provides air heat exchanger with fin type heat exchanger.

 （2）气水分离器gas liquid separator

    压缩空气在蒸发器中被强制冷却后，有大量的冷却水析出。颗粒水珠在作水平运动时，由于悬浮速度小于空气气速（重力作用），因此在蒸发器中就被分离，而细小的水珠悬浮速度大于空气流速而被带出蒸发器。本公司生产的冷干机在蒸发器末端，除装有常规的挡板外，另外装有旋风分离器。它利用离心分离原理，当压缩空气通过气水分离器内的特制挡板后发生急速旋转，液态水被甩出并沿筒壁下流经排水口排出，充分降低吸干机的入口含水量。

    A lot of  condensated water are drained after the compressed air in the evaporator is refrigerated . Water particles is seperated in evaporator when doing horizontal movement ( because its suspended velocity is less than gravity ). While Small water is taken from

evaporator (because suspension speed is more  than gravity ) .At the bottom of the HOLYSUN evaporator ,there is unique cyclone separator beside of common baffle . It uses centrifugal separation principle, when compressed air flow through the baffle in gas liquid separator , compressed air rapidly spin, liquid water was left out and  flows along inner until being drained, therefore fully reduce of the moisture content of

entrance of the desiccant dryer.

2、制冷系统refrigeration system

（1）制冷压缩机Refrigeration compresso

制冷压缩机是冷冻式干燥机的动力源及心脏，为确保产品可靠和稳定的使用效果，避免压缩机漏氟，我公司使用丹佛斯美优乐的全封闭制冷压缩机和台湾汉钟的半封闭螺杆压缩机。

It is dryer’s heart and power producer which ensure reliability and steady effect . To avoid compressors leaking fluorine , we use DANFOSS Maneurop hermetically sealed compressor and TAIWAN Hanbell  hermetic screw compressor .

 （2）冷凝器water cooled condenser    

冷凝器采用板式，结构紧凑，传热效率比管壳式换热器高，板片材料可选用304、316L和SM0254材料，具有耐腐蚀的优点。

The cooling condenser adopt plate type, compact structure, heat transfer efficiency is better than tubular heat exchanger, users can choose 304, 316 L and SM0254 for plate material, it has the advantages of corrosion resistance. in Chinese condensator industry .

（3）干燥过滤器Drying filter  DANFOSS

由于R22的吸水性很小，很少的水份都易在毛细管（膨胀阀）中析出而结冰，从而堵塞，因此R22在进入毛细管（膨胀阀）前必须干燥处理，由于毛细管（膨胀）的孔径都很小，易脏堵，故还必须过滤杂质

Because the water imbibition of R22 is very small .Only few water are prone to  separate out and then freezes  in capillary (expansion valves) , therefore R22 must be dried before entering  capillary (expansion valves), because pore diameter of capillary (inflation) are small, easy dirty transport, we have to filter impurities.

 

（4）节流装置  throttling device   DANFOSS

本公司采用的节流装置为国际知名品牌丹麦丹佛斯公司生产的TKEX系列外平衡式热力膨胀阀，用于调节注入到蒸发器中的制冷剂液体的流量并降低其压力，注入量由制冷剂的过热度来控制，其出口制冷剂的过热度和负荷成比例，TKEX系列热力膨胀阀具有以下特点：

Throttling device  holysun use is  the balanced thermal valve from international famous brand Denmark danfoss TKEX series , it is used to adjust flow rate of refrigerant liquid into evaporator and also reduce the pressure . Refrigerant injectivity is controlled by degree of superheat , The outlet refrigerant degree of superheat and load are  in proportion. TKEX series thermal valve has the following features:

① 温度范围从-25℃~-10℃，任意调整特别适合于冷干机工作工况。The temperature range from 25 ℃ ~-10-℃, any adjustment particularly suitable for work conditions of refrigerated compressed air dryer .

② 过热度可调，能和所有蒸发器匹配，充分发挥蒸发器的效能。 the superheat degreee is adjustable, can match with all kinds of evaporators, help to realize full efficiency of the evaporator.

③ 专利的双接触温度探头（通过压力和温度感应）使制冷剂注入蒸发器的流量和负荷始终恒定，且安装方便和有良好的传热效果。 the patented double contact temperature probe (by the pressure and temperature sensing) make then the refrigerant flow and load into the evaporator always constant, and also turn out to have  convenient installation and  good heat transfer effect.

④ 可换式热力原件。 changable original thermal components

 （5）汽化器vaporizer  FUCO

由于蒸发器回汽中还留有部分液态制冷剂。为了防止压缩机吸入液态氟利昂造成液积，故本公司在压缩机回汽口前加装汽化器，以确保压缩机的使用寿命。

There are some liquid refrigerant  in the evaporator. In order to prevent compressor from liquid accumulation, after Inhaled liquid freon .holysun add vaporizer before back orifice of compressor to ensure that the service life of the compressor

 （6）热气旁通阀  heat bypass valve  DANFOSS

热气旁通阀是一种恒压阀，可根据吸气压力的变化，对制冷压缩机进行部分卸载，以适应热负荷的变化，减少压缩机的开停次数，并使蒸发器内不致于结冰。

Heat bypass valve is a constant pressure valves,  according to pressure changes of inlet air .It reduce pressure of  the refrigerating compressor in order to reduce times of starting and  stopping dryer compressor , And avoid  freezing .in the evaporator .

 （7）自动排水器auto drain乔克JOCK

本公司生产的冷干机和过滤器配套有自动排水器，能自动排去其积存的污水，本公司使用的是本公司特制自动排水器和荷兰乔克的电子排水器。（也可根据可户要求选择其余品牌）。

holysun‘s refrigerated compressed air dryer and filters are all configurate with the automatic drain, which can automatically release  its stockpile of sewage, holysun itself produce  the special automatic drain, and also use the Dutch JOCK electronic drainage device. (users can also choose other brands )