恒温恒湿机除了调节空气温度以外，还具有湿度调节、除尘等功能。与普通空调相比，恒温恒湿精密空调要求能常年不停机地运行，因而其可靠性非常高。恒温恒湿机的送风系统有多种选择。常见的有下送上回、上送下回、上送侧回等。标准型的恒温恒湿机采用中效过滤装置来清洁室内空气。根据客户需要，可以选择亚高效的空气过滤器。

In addition to adjusting the air temperature, the constant temperature and humidity machine also has the functions of humidity adjustment and dust removal. Compared with ordinary air-conditioners, the constant temperature and humidity precision air conditioning system can run all the year round without stopping, so its reliability is very high. There are many options for the air supply system of constant temperature and constant humidity machine. The common ones include the down delivery, the upper and the lower, and the upper side. The standard type constant temperature and humidity machine adopts medium efficiency filter to clean indoor air. According to customer needs, sub efficient air filters can be selected.
 

恒温恒湿机组特点：

Characteristics of constant temperature and constant humidity unit:

1.制冷量一般在10HP-200HP之间；

1. the cooling capacity is generally between 10HP-200HP;

 

2.配置了电加热和电极式加湿，加热量一般富裕量较大，空调机配置加湿量均偏小，需要重新计算，一般需要加大一个型号或多配置一台；

2. configuration of electric heating and electrode humidification, the heating amount is generally rich, air conditioner configuration humidification is small, need to be recalculated, the general need to increase a model or multi - configuration one;

 

3.有额定的风量要求；

3. the rated air volume requirements;

 

4.有额定的冷却水量要求；

4. the rated cooling water requirements;

 

5.冷凝器的阻力一般在0.82-3.45mH2O；

5. the resistance of the condenser is generally at 0.82-3.45mH2O;

 

6.空调机组尺寸较小；

6. the size of the air conditioning unit is small;

 

7.温控范围：18～25，灵敏度：±1；湿控范围：50～70，灵敏度：±5；

7. temperature control range: 18~25, sensitivity: + 1; humidity control range: 50~70, sensitivity: + 5;

 

8.机外静压一般在100～550之间；

 8. machine is generally between 100~550.

 

9.设计条件：进风干球温度23℃，湿球温度17℃；冷却水进水温度30℃，出水温度35℃；

9. design conditions: intake air dry bulb temperature 23 C, wet bulb temperature 17 centigrade, cooling water inlet temperature 30 C, effluent temperature 35 C;

 

一般适用在有温湿度控制或整个设计面积不大的情况下。如果该工程面积较大，系统划分较多，空调机房位置相对分散，管理和系统的控制就会带不便，也不利于能量统一分配，能源浪费较严重。在这种情况下，一般面积在大于2000m2，建议采用冷水机组+组合式空气处理机组的设计形式。

Generally, it is suitable for temperature and humidity control or the whole design area is not large. If the area is large, the system is divided more, the position of the air conditioning machine room is relatively scattered, the management and system control will be inconvenient, and it is not conducive to the unified distribution of energy, and the waste of energy is more serious. In this case, the general area is greater than 2000m2, and the design of chiller + combined air handling unit is recommended.

 

恒温恒湿机组的用途分为两块：

The use of constant temperature and constant humidity unit is divided into two pieces.

 

1、恒温恒湿车间，但无净化要求；

1, constant temperature and constant humidity workshop, but no purification requirements;

 

2、既有恒温恒湿要求，又需要净化等级控制；

2, both constant temperature and humidity requirements, and the need for purification level control;

 

房间的情况：

The situation of the room:

 

1.）房间内显热较大；

1.) the heat in the room is larger.

 

2. ）房间内显热较小；针对以上两点进行分析：

2.) the sensible heat in the room is small;

 

a.从负荷方面考虑：

A. consideration of the load:

 

系统的送风量是与房间内的显热和送风温差决定的,而不是根据系统总制冷量(房间的显热和潜热)计算得出的。恒温恒湿机组制冷量一般显热占50%，潜热占50%，相当于新风占整个送风量的20%左右。当房间内显热较大，而新风量不大时，计算的送风量较大，就不能根据总制冷量选择恒温恒湿机组标定的制冷量来确定。

The air volume of the system is determined by the sensible heat and air temperature difference in the room, not by the total refrigerating capacity of the system (the sensible heat and latent heat of the room). The cooling capacity of constant temperature and humidity unit is 50%, and latent heat is 50%, which is equivalent to 20% of the fresh air volume. When the heat is larger in the room, and when the new air volume is small, the amount of air supply is larger, and it can not be determined according to the refrigerating capacity of the constant temperature and constant humidity unit.

 

b.从机外余压考虑：

B. from external pressure consideration:

 

恒温恒湿，但无净化要求系统对空调机组的机外余压要求不高，主要克服送回风管道、阀门、散流器、初效过滤器等，常规的机组即可满足要求；

Constant temperature and humidity, but no purification requirements of the system for air conditioning units outside pressure requirements are not high, mainly to overcome the air supply and return pipes, valves, diffuser, initial filter, and other conventional units can meet the requirements;

 

既有恒温恒湿要求，又需要净化等级控制的系统对空调机组的机外余压要求较高，一般系统总阻力在1100Pa～1400Pa之间，主要克服送回风管道、阀门、散流器、初效过滤器（初阻力50Pa，终阻力100Pa）、中效过滤器（初阻力150Pa，终阻力300Pa）、高效过滤器（初阻力250Pa，终阻力500Pa）等，常规的机组就无法满足要求。如系统需要设置二次回风，洁净式恒温恒湿机组就无法选用；一次回风的情况，恒温恒湿机组+加压箱的设计形式，由于在选择加压风机的型号时无法与恒温恒湿机组内的风机很难匹配，不同型号、不同功率的风机在串联或并联时总风量不是简单的相加，计算相对较复杂；建议在一般设计过程中尽量设计为单风机系统。

The system not only has the requirement of constant temperature and humidity, but also needs the system of purifying grade control to have high external pressure requirement for air conditioning unit. The general system resistance is between 1100Pa and 1400Pa, which mainly overcomes the air supply and return pipe, valve, diffuser, initial effect filter (initial resistance 50Pa, final resistance 100Pa), middle effect filter (initial resistance 150Pa, final). Resistance 300Pa), high efficiency filter (initial resistance 250Pa, final resistance 500Pa) and so on, conventional units can not meet the requirements. If the system needs to set two return air, the clean type constant temperature and constant humidity unit can not be selected; the first return air condition, the design form of the constant temperature and constant humidity unit + pressurization box, because it is difficult to match the fan in the constant temperature and humidity unit when choosing the type of the pressure fan, the different type and different power fan are in series or parallel. When the total air volume is not simply added, the calculation is relatively complex. It is suggested that the single fan system should be designed as far as possible in the general design process.

 

系统的运作原理

The operating principle of the system

恒湿恒湿机系统的运作是通过三个相互联系的系统：制冷剂循环系统、空气循环系统、电器自控系统;

The operation of the constant humidity and humidity machine system is based on three interrelated systems: refrigerant circulation system, air circulation system, and electrical appliance automatic control system.

 

1，制冷剂循环系统

1, refrigerant circulation system

 

蒸发器中的液态制冷剂吸收空气的热量（空气被降温及除湿）并开始蒸发，比较终制冷剂与空之间形成一定的温度差，液态制冷剂亦完全蒸发变为气态，后被压缩机吸入并压缩（压力和温度增加）,气态制冷剂通过冷凝器（风冷/水冷）吸收热量，凝结成液体。通过膨胀阀（或毛细管）节流后变成低温低压制冷剂进入蒸发器，完成制冷剂循环过程。

The liquid refrigerant in the evaporator absorbs the heat of the air (the air is cooled and dehumidified) and begins to evaporate, eventually forming a certain temperature difference between the refrigerant and the air, and the liquid refrigerant is completely vaporized into the gaseous state, then the compressor is inhaled and compressed (pressure and temperature increases), and the gaseous refrigerant passes the condenser (air cooling / water). Cold) absorbs heat and condenses into a liquid. Through the expansion valve (or capillary) throttling, the cryogenic low pressure refrigerant enters the evaporator to complete the refrigerant circulation process.

 

2，空气环系统

2, air loop system

 

风机负责将空气从回风口吸入，空气经过蒸发器（降温、除湿），加湿器，电加热器（升温）后经送风口送到用户需的空间内，送出的空气与空间内的空气混合后回到回风口。

The fan is responsible for inhaling the air from the air inlet. The air passes through the evaporator (cooling, dehumidification), humidifier and electric heater (Sheng Wen). The air is sent to the user's space after the air inlet. The air sent out and the air in the space will be mixed back to the air vent.

 

3，电器自控系统

3, electrical automatic control system

 

包括电源部分和自动控制部分。电源部分通过接触器，对压缩机、风扇、电加器器，加湿器等供应电源自动控制分部分又分为温、湿度控制及故障保护部分:温、湿度控制是通过温、湿度控制器，将回风的温湿度与用户设定的温湿作对比，自动运行压缩机（降温、除湿），加湿器，电加热（升温）等元件，实现恒温恒湿的自动控制

It includes the power supply part and the automatic control part. Through the contactor, the power supply is divided into the temperature, humidity control and the fault protection parts of the compressor, the fan, the adder and the humidifier. The temperature and humidity control is through the temperature and humidity control, and the temperature and humidity of the return air is compared with the temperature and humidity set by the user, and the compressor is automatically run. Temperature, dehumidification, humidifier, electric heating (Sheng Wen) and other components to achieve automatic control of constant temperature and humidity.