What is the high-precision constant temperature and humidity air conditioning control logic like

High precision constant temperature and humidity air conditioning, mostly used in climate room, plant room, laboratory, three coordinate room, national laboratory, measurement institute and other laboratories with high stability requirements for temperature and humidity, therefore, the industry is also used to call it laboratory air conditioning.

A complete set of high precision constant temperature and humidity air conditioning system, in fact, including constant temperature and humidity air conditioning unit, air flow organization, envelope insulation sealing and other three aspects. Let's mainly talk about the equipment level first today. Steady temperature and humidity air conditioning can meet the requirements of high standards, in addition to the control logic, but also rely on hardware support, such as:

1. choose a high sensitivity temperature and humidity sensor;

2. cold air ratio matching reasonable (specific for the wind volume small enthalpy difference design, but can not blindly pursue the wind volume, which will make the unit lose a large degree of dehumidification capacity);

3. use the electronic expansion valve and differential pressure controller and a series of refrigeration components and soon.

Just now we talked about the control logic of high precision constant temperature and humidity air conditioning, there are three main uses in the market:

• Adopt multi-stage refrigeration, multi-stage heating, PID humidification;

• VRV system: using electronic expansion valve + frequency conversion vortex compressor. The adjustment quality of this continuous control mode is far better than that of the intermittent control based on the solenoid valve switch.

• analog volume water valve + frozen water system: through to the control of the opening of the water valve, easy to achieve 0% to 100% refrigeration capacity stepless adjustment.