Kollmorgen 控制传输速度 DBL3H-0102000000000-00420R
空气流量：
VAV代表可变风量，VAV箱可以是空气处理系统的一部分。它们位于
空气到达指定空间之前的管道系统。来自空气处理装置的一次空气被推向下游
至VAV箱。就在变风量箱之前，有一组风门（C）。这些风门由空气控制
流量传感器（B）或空间恒温器（G），其将命令致动器（D）打开或关闭，以调整
推动穿过加热线圈的空气量（可选）。当空气进入VAV时，加热线圈在内部
必要时将加热空气。当空气被加热时，它被推出VAV箱，并被输送到空间
二次空气。如果不需要加热，则接触器将不会启动加热线圈，空气随之流动
没有暖气。
系统变化：
1.加热线圈可能不存在于每个单元中。
2.风扇可位于VAV内部，以在风量较低时增加空气速度。
3.在某些情况下，可能存在加湿器。
直接膨胀（DX）独立空调系统
组件/布局：
电容线圈
风扇
压缩机
膨胀阀
蒸发器盘管
恒温器
B
E
F
D
格特
C
A.
外屋
T
暖湿空气
冷气
暖湿空气
干热空气
A、B、B
C
D
E
F
答：
B：
C：
D：
E：
F：
G：
答：
B：
C：
D：
E：
F：
IPI在环境中实施可持续节能战略的方法（2017年）
15
空气流量：
在空间内，空气通过装置的侧面吸入。空气被推过蒸发器（冷却）
盘管，将其冷却至房间所需温度，并将风门推到
单元该系统设计用于合理地冷却通过的空气，任何可能发生的除湿都是
这一行动。空气经过处理后，可能会在处理过程中失去一些水分，但排出的较冷空气会
相对湿度高于进入的空气。
在装置的外部，外部空气从装置的侧面吸入。空气由风扇推动
穿过冷凝器盘管，通过的空气将吸收盘管的热量并从后部排出
单位的。排出的空气将比外部空气更热、更干燥。
制冷剂/冷却剂循环：
就在膨胀阀（D）之后，制冷剂开始作为低温低压液体。
在这种低压条件下，制冷剂具有低沸点。制冷剂通过
蒸发器盘管（E），其从流经盘管的热空气中吸收热量。吸收的热量
热空气使制冷剂沸腾并变成蒸汽。制冷剂继续通过系统
朝向压缩机（C）。当制冷剂进入压缩机时，制冷剂处于低温、低压状态
水蒸气
制冷剂进入压缩机，在那里被加压成高温高压蒸汽。这个
制冷剂现在处于非常高的压力下并且具有高沸点。在这些条件下，制冷剂可以
容易浓缩。当制冷剂通过冷凝器盘管（A）时，装置内的风扇推动空气
穿过线圈。当风扇推动空气通过散热片时，制冷剂将热量排出到通过的空气中。这个
通过的空气将吸收热量，使制冷剂冷却并冷凝成液体。高压
液体流向冷凝器的出口，即膨胀阀（D）。制冷剂将进入阀门
Kollmorgen 控制传输速度 DBL3H-0102000000000-00420R
Kollmorgen 控制传输速度 DBL3H-0102000000000-00420R
Air Flow:
VAV stands for variable air volume, and VAV boxes may be a part of an air handling system. They are located in
ductwork before the air reaches a designated space. Primary air from the air handling unit is pushed downstream
to a VAV box. Just before the VAV box there are a set of dampers (C). These dampers are controlled by an air
flow sensor (B) or a space thermostat (G) that will command the actuator (D) to open or close to adjust the
volume of air that is pushed across the heating coils (optional). When air enters a VAV the heating coils inside
will heat the air if necessary. As the air is heated it is pushed out of the VAV box and delivered to the space as
secondary air. If no heating is required the contactor will not activate the heating coils and the air passes on with
no heating.
System Variations:
1. A heating coil may not be present in every unit.
2. A fan may be located inside the VAV to increase air velocity when air volume is low.
3. In some cases a humidifier may be present.
Direct Expansion (DX) Individual Air Conditioning System
Components/Layout:
Condenser Coil
Fans
Compressor
Expansion Valve
Evaporator Coil
Thermostat
B
E
F
D
G T
C
A
OUTSIDE ROOM
T
Warm Moist Air
Cool Air
Warm Moist Air
Hot Dry Air
A B B
C
D
E
F
A:
B:
C:
D:
E:
F:
G:
A:
B:
C:
D:
E:
F:
IPI’s Methodology for Implementing Sustainable Energy-Saving Strategies in Collections Environments (2017)
15
Air Flow:
Inside the space air is drawn in through the sides of the unit. This air is pushed across the evaporator (cooling)
coils where it is cooled to the desired temperature for the room and pushed out the dampers on the front of the
unit. The system is designed to sensibly cool the passing air, any dehumidification that may occur is a byproduct of
this action. As the air is treated it may lose some of its moisture in the process, but the exiting cooler air will have
higher relative humidity than the entering air.
On the outside portion of the unit, outside air is drawn in from the sides of the unit. This air is pushed by a fan
across the condenser coils where the passing air will absorb the heat from the coils and be expelled out the rear
of the unit. The expelled air will be hotter and drier than the outside air.
Refrigerant/Coolant Cycle:
Beginning just after the expansion valve (D) the refrigerant starts off as a low temperature, low pressure liquid.
Under this low pressure condition the refrigerant has a low boiling point. The refrigerant is pushed through the
evaporator coil (E) where it absorbs heat from the warm air that is passing over the coils. The heat absorbed by
the warm air causes the refrigerant to boil and become a vapor. The refrigerant continues through the system
toward the compressor (C). As it enters the compressor the refrigerant is now a low temperature, low pressure
vapor.
The refrigerant enters the compressor where it is pressurized into a high temperature, high pressure vapor. The
refrigerant is now under very high pressure and has a high boiling point. At these conditions, the refrigerant can
condense easily. As the refrigerant moves through the condenser coil (A) the fan inside the unit is pushing air
across the coils. The refrigerant will expel heat to the passing air as it is pushed though the fins by the fan. The
passing air will absorb the heat, causing the refrigerant to cool and condense into a liquid. The high-pressure
liquid moves towards the outlet of the condenser, the expansion valve (D). The refrigerant will enter the valve
Kollmorgen 控制传输速度 DBL3H-0102000000000-00420R
