Constant temperature and humidity laboratory is a laboratory through some special equipment and technical methods, so that its indoor temperature and humidity meet the requirements of a certain humidity control and test standard atmosphere. Constant temperature and humidity laboratory is the infrastructure for product quality inspection and control of production enterprises and commodity quality inspection and control in the field of circulation. Constant temperature and humidity laboratory is widely used in cotton spinning, wool spinning, chemical fiber, paper, packaging, tobacco production enterprises and quality inspection, fiber inspection and other departments, in accordance with ISO and GB standards, textiles, textile raw materials, paper, paper products and cartons and other commodities physical items inspection must be carried out under standard atmospheric conditions. In addition to the regular temperature and humidity of the constant temperature and humidity laboratory, there are other special 5-18℃ low temperature, 30-80℃ high temperature, relative humidity requirements less than 40%RH low humidity, relative humidity higher than 80%RH high humidity and other special requirements of the constant temperature and humidity laboratory.

Constant temperature and humidity laboratory overall design planning points:

1) Temperature and humidity control range

2) Temperature and humidity control accuracy

3) Cleanliness requirements

4) Illumination requirement

5) Heat and humidity range of the equipment

6) Air conditioning return air mode

7) Air pressure balance measures

8) The necessity of introducing fresh air

9) The necessity of system exhaust

10) Thermal insulation measures

11) Configuration of facilities and power

12) Static electricity, vibration and noise

13) Equipment space and air conditioning room

14) Arrangements for access and changing buffer zones

15) Adequate maintenance space

16) Indoor net height and floor load

17) Public hazards, pollution and disaster prevention

18) Measurement of installation and operating costs

19) Aesthetic requirements

20) Installation cost/schedule control

21) Operating costs

22) Maintenance & elasticity and other factors