Constant temperature and humiditytemperatureandhumidityyesconstantConstant.However, many factors will affect the temperature and humidity. Therefore, in most cases, constant temperature and humidity refers to the control of temperature and humidity within a certain range. For example, temperature 20 ± 1 ℃ and humidity 50 ± 3% can be called constant temperature and humidity.
Chinese name
Constant temperature and humidity
Constant temperature and humidity grid
10-120
Classification of constant temperature and humidity
Designed and produced in strict accordance with GB 10592-2008 Technical Conditions for High and Low Temperature Test Chambers and GB10586-2006 Technical Conditions for Humid Heat Test Chambers
1. Laboratory decoration: strict thermal and moisture insulation performance is required, and it is recommended to use four facades of the laboratoryColor steel composite platePE insulation board is used on the top and bottom for heat and moisture insulation;For perspective window, double layer is requiredvacuumcasement window.
2. Laboratory air conditioning: laboratory air conditioning is the heart of temperature and humidity control, requiring high precision and low failure rate.Therefore, the air conditioner must be able to adjust the cooling capacity. There are two ways on the market: one isfrequency conversionRegulation;The other is chilled water regulation.
Variable frequency regulation: in fact, it is to change the power of the compressor by changing the nature of the power supply, so that the compressor can work under low load or overload, and at the same time adjust the flow savings of the refrigeration system. Therefore, a lot of tedious links must be added, and each link must be perfectly matched, or failure will occur.It is true that the failure rate is very high, and its representative brand is "Yoton".
Chilled water type unit: cold water of about 7 ℃ is used as the cold source, and the water flow is controlled by turning the electric valve on or off, so that the cooling capacity can be easily controlled. The electric valve structure is as simple as a household tap, so the failure rate is almost zero, and the control effect is the most stable.The air volume, cooling capacity, heating capacity and humidification capacity are matched by reasonably calculating the heat and humidity load and air dew point of the roomPLC controlThe stepless regulation of each component can achieve a temperature of ± 0.1 ℃ and a humidity of ± 1% when selecting sensors with high sensitivity and good linearity.This method needs to calculate and match by the actual area and load of each laboratory, so there is no standard forming unit, and they are all customized processing type.Generally, it is realized by the combination ratio of the combined air conditioning box, so the disadvantage is that it occupies a large area.
3. Ventilation mode
The ventilation mode has gone through several historical stages, from the initial bottom air outlet, to the natural air supply, to the topDiffuserThe air supply is from the most advanced upper air duct+microporous ceiling to the lower floor air return mode. The air supply in the whole laboratory is soft and uniform, and the temperature and humidity control is very stable.
4. Fresh air system
The primary function of the fresh air system is to provide physiological fresh air for the staff, which also contributes to the stability of the temperature and humidity of the laboratory, and is also an essential equipment: in order to protect the laboratory from external interference, fresh air must be provided to the laboratory to keep the laboratory air pressure positive, so that external air cannot enter the laboratory,Ensure that the temperature and humidity of the laboratory are stable throughout the year.
Design Criteria
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GB2423.1-2008 Test A Low Temperature Test Method;
GB2423.2-2008 Test B High Temperature Test Method;
GB2423.3-2006 Test Ca Constant Damp Heat Test Method;
GB2423.4-2008 Test Db Alternating Damp Heat Test Method and other national standards, as well as the requirements of other relevant standards.
It is designed and produced in strict accordance with GB 10592-2008 Technical Conditions for High and Low Temperature Test Chambers and GB10586-2006 Technical Conditions for Humid Heat Test Chambers.
Features and Application
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With the increasingly strict requirements for quality control, the demand for constant temperature and humidity environment is growing, and the application field is also becoming wider and wider.
With the development of modern society and economy, people have higher and higher requirements for air temperature and humidity in industrial environment, and constant temperature and humidity environment control equipment should be used in more and more fields.Ling YuSelection of industrial constant temperature and humidity air conditioners
International brand compressors, refrigeration accessories and electrical control elements are designed and manufactured in full accordance with European industrial standards, which are reliable, efficient, and controlled.
The unit is widely used in workshops, workshopsExhibition Hall, archives, laboratories, professional creation of precision constant temperature and humidity industrial air conditioning environment.
Model Selection Description
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1. Industrial production spaceRelative humidity of airIndustrial constant temperature and humidity air conditioning products can be selected when the requirements for temperature control clarity are high at the same time.
2. The set range of this series group: temperature 18-28 degrees plus or minus 1 degree, relative humidity 40-70% plus or minus 5%.
3. Determine the rated air volume.
4. Determine cooling, heating and temperature loads.
5. Determine the base model.
6. Determine the condensation mode.
7. Determine the air supply structure type.
Purpose:
High precision microcomputer touch control of temperature and humidity is adopted, which is matched with platinum thermometric antibody of high stability and wind speed circulation system of temperature visibility test to achieve uniform, accurate and stable temperature and humidity control.There is also a completely independent heating, cooling, humidification, cooling and dehumidification system, which can be used for different environmental tests at high temperature, low temperature and constant temperature and humidity.
Technical specifications:
Inner box size cm
40×50×40
Temperature range and accuracy
-40~ +150℃
Humidity range and accuracy
20%RH~98%RH
Temperature and humidity control
Japan UMS-1200 programmable touch screen controller
circulatory system
Forced circulation mode of fan
heating system
SUS #304, Stainless steel heater.
Humidification system
Surface evaporation mode, transparent structure.
Cooling system
Fan cooling mode, high efficiency fully enclosed compressor.
Water supply system
Fully automatic control
Dehumidification system
Cooling latent heat dehumidification mode
Safety devices
electric leakage
Standard equipment
0~999.9H power failure memory type
Power Supply
Single phase AC220V/50 or 60Hz.
Troubleshooting
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In the constant temperature and humidity humidity and heat test, the actual humidity will reach 100% or the actual humidity is much lower than the target humidity. The former phenomenon may be caused by the drying of the gauze on the wet bulb sensor. Then check whether the water tank of the wet bulb sensor is short of water. The water level in the tank is determined byWater level controllerFor automatic control, check whether the water supply system of the water level controller supplies water normally and whether the water level controller works normally.Another possibility is that the wet ball gauze will become hard due to its long use time or the purity of the water supply quality, making the gauze unable to absorb water and dry. As long as the gauze is replaced or cleaned, the above phenomenon can be eliminated.The latter phenomenon is mainly that the humidification system does not work. Check the water supply system of the humidification system, whether there is a certain amount of water in the water supply system, whether the water level control of the humidification boiler water level is normal, and whether the water level in the humidification boiler is normal.If all the above is normal, check the electrical control system, and ask professional maintenance personnel for maintenance.
When the constant temperature and humidity test equipment suddenly fails during the test operation, the corresponding fault display prompt and audible alarm prompt will appear on the control instrument.The operator can quickly check the type of fault according to the chapter of troubleshooting in the operation and use of the equipment, and then ask professionals to quickly eliminate the fault to ensure the normal progress of the test.There will be other phenomena in the use of other environmental test equipment, so specific phenomena should be analyzed and eliminated.
Air conditioning equipment
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Temperature: 10-50 ± 1 ℃ (and higher precision)
Humidity: 20-80% ± 2 (and higher)
Temperature control, humidity and precision can reach the national A-level standard.
twoTemperature and humidity control performance:
The equipment has refrigeration, heating, humidification, dehumidification and other functions, and can automatically adjust the indoor temperature and humidity according to customer requirements.
