冷冻式干燥机
达到 +3 °C 压力露点的标准、低成本做法。
技术参数
- 容积流量（FAD）
- 10.0 – 383.3 m³/min
- 工作压力
- 13 – 16 bar g
- 电机功率
- 1 – 32 kW
- 重量
- 134 – 2,410 kg
概述
A refrigerant dryer chills the compressed air until the water in it condenses, then drains that water away and reheats the air. It is the simplest and cheapest form of drying and it covers the large majority of industrial applications.
It will get you to a pressure dew point of about +3 °C, which means no liquid water in your pipework as long as the pipes do not run somewhere colder than that. For general workshop, packaging and machine air, that is exactly what you need.
主要优势
Low running cost
Typically 1 – 2% of the compressor's power, versus 15 – 20% for a heatless desiccant dryer.
No consumables
No desiccant beads to replace every three years. Filters and a drain, and that is all.
Cycling control
Cycling models switch the refrigerant circuit off at low load instead of running continuously.
Sized for Gulf ambients
Selected against 45 °C ambient and 45 °C inlet, not the 25 °C figure that makes a datasheet look good.
机器是怎么造的
冷冻式干燥机把空气冷却到其中的水分凝结出来，把水排走，再用进来的空气把它回温。最后这一步，正是下游管路不再"出汗"的原因，也是把大部分压降找回来的办法。
品质高低体现在换热器上。一台尺寸充裕的换热器能在报价时承诺的压降下给出稳定的露点；一台偏小的换热器，只有在凉爽的日子才给得出样本上的露点。
循环型机型在低负荷时把制冷回路停下来，而不是让它连续运转；在轻载的工厂里，大部分节能正是从这里来的。
- 空气对空气与空气对制冷剂换热器
- 额定流量下压力露点稳定
- 干燥机两端压降低
- 轻载工厂可用循环控制
- 按高环境温度选型
- 标配电子排水阀
- 可选零气损排水阀
- 制冷剂符合现行法规
控制器做的事
它显示的是压力露点，而不是一盏指示灯，因为看得见的露点才是能拿给审核员看的露点。
在循环型机型上，它决定什么时候让制冷回路歇一歇。在轻载的工厂里，这是一天中的大部分时间，也正是买它的全部理由。
排水是受控的，不是定时的。定时排水阀要么浪费空气，要么留下积水，而两者的代价都比排水阀本身贵。
- 显示压力露点，而不是一盏指示灯
- 轻载工况下的循环控制
- 电子控制排水阀
- 露点过高报警
- 以小时计的保养倒计时
- 故障记录保存在机组上
- 用于工厂报警系统的无源触点
- 断电后自动重启
配件与保养套件
保养清单很短：清洗冷凝器、保养排水阀、检查制冷剂——而其中第一项才是真正导致故障的那一项。
冷凝器堵塞会悄悄抬高露点。干燥机照常运转，空气照常流动，而水跑到下游的用气点，最后被人在产品里发现。
我们在与压缩机同一次上门时保养干燥机，这是合理的做法，也是多数客户把两者放进同一份服务方案的原因。
- 冷凝器清洗列入保养计划
- 排水阀保养套件
- 制冷剂检查与补充
- 保养后验证露点
- 与压缩机在同一次上门中一并保养
- 配件本地有库存
- 服务方案下固定价格
- 服务车上常备备用排水阀
机型范围
- 16 bar g
- 10.00 m³/min
- 重量
- 134 kg
- 外形尺寸 长 x 宽 x 高
- 720 × 750 × 1360 mm
- 13 bar g
- 13.00 m³/min
- 重量
- 164 kg
- 外形尺寸 长 x 宽 x 高
- 720 × 750 × 1361 mm
- 13 bar g
- 15.83 m³/min
- 重量
- 168 kg
- 外形尺寸 长 x 宽 x 高
- 720 × 750 × 1362 mm
- 14 bar g
- 25.00 m³/min
- 重量
- 234 kg
- 外形尺寸 长 x 宽 x 高
- 806 × 1012 × 1539 mm
- 14 bar g
- 43.33 m³/min
- 重量
- 290 kg
- 外形尺寸 长 x 宽 x 高
- 806 × 1012 × 1539 mm
- 14 bar g
- 80.00 m³/min
- 重量
- 465 kg
- 外形尺寸 长 x 宽 x 高
- 880 × 1819 × 1796 mm
- 13 bar g
- 100.00 m³/min
- 重量
- 780 kg
- 外形尺寸 长 x 宽 x 高
- 1510 × 1500 × 1555 mm
- 13 bar g
- 191.67 m³/min
- 重量
- 1,205 kg
- 外形尺寸 长 x 宽 x 高
- 2270 × 1590 × 1570 mm
- 13 bar g
- 383.33 m³/min
- 重量
- 2,410 kg
- 外形尺寸 长 x 宽 x 高
- 4600 × 1590 × 1570 mm
容积流量按 ISO 1217 第四版附录 C 与 E 实测，进气 1 bar(a)、20°C、湿度 0%。噪声按 ISO 2151 在自由场条件下测量，公差 ± 3 dB(A)。每款机型均有水冷版本，可向我们索取其数据表。
常见问题
How does a refrigerant dryer work?
It chills the compressed air until the water in it condenses, drains that water away, then reheats the air on the way out so the pipework does not sweat.
What dew point does it give me?
About +3 °C. That means no liquid water anywhere your pipework stays warmer than that, which covers most indoor factory installations.
Can it freeze?
A correctly controlled one cannot, because it is designed to stop just above 0 °C. If a dryer ices up, the control or the load is wrong, not the technology.
How much power does it use?
One to two percent of the compressor's power. Compared with a heatless desiccant dryer taking 15–20% of your air as purge, it is very cheap to run.
What is a cycling dryer?
One that switches the refrigerant circuit off at low load instead of running continuously. Worth it where the compressor spends much of the day lightly loaded.
Why did mine stop drying in summer?
Almost always a dirty condenser or a dryer sized at 25 °C conditions sitting in a 45 °C plant room. Condenser cleaning is the single most valuable dryer maintenance task in this climate.
Do I need filters with it?
A coalescing filter before it to protect it, and a particulate filter after. Fitting the dryer alone and skipping the pre-filter is how they get contaminated early.
What size do I need?
Rated on the compressor's delivered flow, then corrected for inlet and ambient temperature. A dryer rated at 25 °C loses roughly a third of its capacity at 45 °C.
How long does a refrigerant dryer last?
Ten years or more if the condenser is kept clean and the drain works. The compressor inside it is the same kind used in refrigeration and fails for the same reasons.
Is there any consumable cost?
Almost none: no desiccant to replace, just filters and drain servicing. That is the main reason it is the default choice.
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