Constant temperature and humidity laboratory

(A), constant temperature and humidity laboratory definition
The constant temperature and humidity laboratory is used in important places for product development, research, testing (experiment) and testing. The principle is: using constant temperature and humidity air conditioning technology to heat up, cool down, humidify and dehumidify the laboratory, and then the temperature and humidity of the precision control laboratory are stable within a certain control range. The constant temperature and humidity laboratory designed and built by Nanjing Hengbiao Company is the highest. Accuracy has reached: constant temperature ± 0.1 ° C, constant humidity ± 1% RH, is now in the industry leader!
(II) Application range of constant temperature and humidity laboratory
The constant temperature and humidity laboratory is the infrastructure for the quality inspection and control of the production enterprise and the quality inspection of the goods in the field of circulation. Constant temperature and humidity laboratory is widely used -Cotton spinning, wool spinning, knitting, fabrics, chemical fiber, paper, packaging, leather, composite materials, coatings, tobacco manufacturers and quality inspection, fiber inspectionIn accordance with the relevant standards of ISO and GB, the inspection of physical and physical items of textiles, textile raw materials, paper, paper products and cartons must be carried out under standard atmospheric conditions. The standard atmosphere for textile and textile raw materials inspection is in accordance with ISO139 and GB6529 standards, temperature 20±1°C, relative humidity 65%±2%; standard atmosphere for paper, paper and carton inspection according to ISO187 and GB10739 standards, temperature 23 ±1 ° C, relative humidity 50% ± 2%. In addition to the constant temperature and humidity laboratory of conventional temperature and humidity, there are other special requirements such as low temperature of 5-18 °C, high temperature of 30-80 °C, low humidity of relative humidity requirement of less than 40% RH, and high humidity of relative humidity higher than 80% RH. Constant temperature and humidity laboratory. With the application of constant temperature and humidity laboratory more and more widely, it is currently used in various production enterprises for quality testing, biological cultivation, edible fungus cultivation, testing and measuring institutions, three-coordinate measurement, biochemical experiments and other fields.
 (three), constant standardConstant temperature and humiditylaboratory

(four),Some industries test temperature and humidity standards

 

(5) High-precision constant temperature and humidity laboratory designed by HengbiaoHas the following characteristics

1. High precision: The accuracy of the laboratory environment is the biggest factor affecting the test results. Therefore, the precise control of the equipment is the primary consideration for our design of constant temperature and humidity laboratory.
Constant standard for the constant temperature and humidity laboratory using variable frequency integrated machine control, using DC inverter compressor: dynamic refrigeration, variable capacity output cooling capacity, 20% energy saving than AC frequency conversion; 50% energy saving than fixed frequency unit; DC inverter compressor Energy efficiency ratio up to 4.8; electronic expansion valve: precise adjustment of the superheat of the refrigeration system; EC fan: air volume can be continuously adjusted, energy saving 30% than the AC fan.
Constant standard for ultra-high-precision, non-standard constant temperature and humidity laboratory using DDC or PLC intelligent control, the controller generally uses Siemens or Mitsubishi and other brands, according to the signal feedback from the indoor sensor to make the corresponding action, intelligent high, easy to operate Fast and accurate ultra-high precision constant temperature and humidity air conditioning technology, which can accurately control the humidity and balance the temperature. 2. Stability: The stability of the constant temperature and humidity unit is an important factor affecting the operation of the constant temperature and humidity laboratory. The laboratory air conditioner needs long-term uninterrupted operation. This requires strict requirements for all parts of the precision air conditioner. The constant temperature and humidity laboratory special air conditioner can run 24 hours a year, the mature and stable constant temperature and humidity product core control technology research and development, and each component has been optimized, finely crafted, for the production enterprise product testing and product quality Provide a stable constant temperature and humidity laboratory.
3, environmental protection and energy conservation: laboratory energy conservation is the top priority of the current development, is a favorable guarantee for the long-term operation of the laboratory. Constant standard adopts the latest temperature and humidity compensation system technology, so that the constant temperature and humidity precision air conditioner not only guarantees the accuracy and stability of temperature and humidity control, but also reduces the energy consumption by more than 65%, which is obvious with the high-power equipment of traditional constant temperature refrigeration and dehumidification. The advantage is greatly reduced the operating cost of the entire system.
4, fool-type operation: the more intelligent system, the simpler the operation should be, the laboratory staff is not HVAC professional and technical personnel, so the constant temperature design of the constant temperature and humidity unit operation interface is simple and user-friendly, operating fool, set the temperature The humidity range can be automatically operated, and an abnormal situation will send a text message reminder, without special maintenance.
Constant standard design complete constant temperature and humidity laboratory including planning layout and decoration system, air conditioning system, ventilation system, water supply and drainage system, control system, indoor lighting socket distribution system, laboratory furniture and supporting user training, maintenance and other integrated components .
(6) The complete laboratory shall include the integration of building layout and decoration system, air conditioning system, ventilation system, water supply and drainage system, control system, indoor lighting distribution system, laboratory furniture and supporting user training and maintenance.
________________________________________
1.3. Constant temperature and humidity laboratory overall system composition
1.3.1. Applying a construction material with good thermal insulation and moisturizing effect, and constructing a space that is conducive to the stability of the constant temperature and humidity system (library)

1.3.2. Application of temperature and humidity 焓 difference relationship and temperature and humidity compensation method The indoor temperature, humidity, reduction and compensation relationship are calculated by temperature and humidity ratio.
1.3.3. Use the engineering method to adjust the indoor temperature and humidity to a moderately accurate adjustment of the indoor air flow, air flow relationship, replenishment amount, positive pressure and negative pressure.
1.3.4. Accurate precision adjustment using high-precision sensors, high-precision temperature and humidity compensation systems, and running software.
2. Composition of constant temperature and humidity laboratory engineering
2.1. Insulation and moisturizing enclosure construction (laboratory moisturizing warehouse), also known as laboratory decoration system.
2.2. Constant temperature and humidity system equipment (unit, pipeline)
2.3. Return to the wind pipe system
2.4. Constant temperature and humidity control system
2.5 Auxiliary Power Control and Lighting System Engineering
2.6. Intelligent remote control system
3. The basic matching room of the standard constant temperature and humidity laboratory:
It should include buffer rooms, laboratory rooms and air-conditioned rooms.
4. Constant temperature and humidity laboratory decoration system:
The constant temperature and humidity laboratory has strict requirements on the decoration materials. The overall warehouse materials require insulation to ensure the influence of the outside air on the laboratory environment. The constant temperature and humidity laboratory enclosure materials require strict insulation and moisture barrier performance, and pay attention to fire prevention. .
(1) Insulation board: Generally, foam color steel plate (chemical name is polystyrene color steel plate), rock wool color steel plate, polyurethane color steel plate, glass magnesium color steel plate, etc. are used. Generally, the thickness is 50mm, 75mm or 100mm. The higher the precision, the higher the requirement is.
(2) In order to ensure airtightness, arc seals are applied to the four corners of the roof and the wall, and the four corners of the door and the corner line are sealed by aluminum alloy.
(3) Doors and windows adopt special sealing doors and closed windows for constant standard. Closed windows require double-layer insulated fixed glass windows. For the perspective window, for observation, to reduce the movement of people affecting the indoor environment.
(4) Ground treatment: Waterproof treatment must be done, and the ground insulation performance must meet the requirements; generally 600*600 anti-static high floor is laid.
(5) Lighting: Reasonably arrange lighting fixtures for different indoor requirements, all of which are mainly environmental protection and energy saving.
LED energy-saving lamps are generally used.
5. Constant temperature and humidity laboratory airflow organization:
The indoor air supply needs to design the ventilation and ventilation cycle mode according to the accuracy of constant temperature and humidity. Ordinary generally adopts the upper side. The constant temperature and humidity pipeline part includes the air pipe and the water pipe and the copper pipe, and the excess energy in the body is transferred to the outdoor, and the air pipe uses the cold heat generated by the constant temperature and humidity device, and then is sent into the room, so the heat preservation performance is high. The constant temperature and humidity engineering with different precision requirements has different airflow organization design. In the system with common accuracy requirements, it is generally used to send the lower side back; in high-precision constant temperature and humidity engineering (such as temperature accuracy ± 0.2) , 0.1 ° C), must use the orifice plate to supply air, the lower part of the uniform return air, in order to meet the required temperature and humidity precision control. Different temperature and humidity accuracy requirements, design air supply temperature difference is different, ± 2 ° C constant temperature and humidity project, the number of air changes is about 10 ~ 15 times / h, ± 1 ° C constant temperature and humidity project, the number of air changes about 15 to 20 times /h;±0.5°C constant temperature and humidity project, the number of air changes is about >20 times/h; the constant temperature and humidity project of ±0.2°C, the number of air changes is about 30 times/h (the actual consultation of the standard engineer needs to be calculated in detail) ).
6. Constant temperature and humidity laboratory fresh air system
The first function of the fresh air system is to provide the staff with physiological fresh air, which is also indispensable for the stability of the laboratory temperature and humidity. It is also an indispensable equipment: in order to protect the laboratory from external interference, it must be directed to the laboratory. Provide fresh air to keep the laboratory air pressure positive, so that the outside air can not enter the laboratory, ensuring that the laboratory's long-term temperature and humidity are stable.
Case:
Construction unit: a corporate textile testing laboratory
Project content: constant temperature and humidity laboratory engineering and other supporting equipment of the laboratory, the overall construction.
Project status: The total laboratory area is about 50m2, the height is 2.6m, the temperature is 20±1°C: the humidity is 65±2% RH.
Laboratory layout