A list of the contents of this article:
- 1 、How to buy programmable constant temperature and humidity machine key points, where can I understand?
- 2 、What is the principle of the detector in their hands at the explosion-proof gate of the airport?
- 3 、What is the principle of airport security and explosion protection?
How to buy programmable constant temperature and humidity machine key points, where can I understand?
Constant temperature and humidity machine (constant temperature and humidity test chamber | programmable constant temperature and humidity testing machine | high and low temperature alternating humid heat test chamber) mainly provides constant humid heat, complex high and low temperature alternating test environment and test conditions for electronic components, industrial materials, finished products in research and development, production and inspection, suitable for electronic and electrical appliances, communications, chemical, hardware, rubber, toys and other industries. The constant temperature and humidity machine system operates through three interrelated systems: refrigerant circulation system, air circulation system and electrical automatic control system. In the refrigerant circulation system, 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 evaporated into a low-temperature and low-pressure gaseous state, which is then inhaled and compressed by the compressor (pressure and temperature increase). The gaseous refrigerant absorbs heat through the condenser (air-cooled / water-cooled) and condenses into a liquid. After throttling through the expansion valve (or capillary), it becomes a low-temperature and low-pressure refrigerant into the evaporator to complete the refrigerant cycle process. Constant humidity machine temperature range: 0 ℃ ~ 150 ℃, humidity range: 30% 98% RH, according to test requirements can be divided into two types: vertical and desktop.
Chinese name
Constant temperature and humidity machine
Observation window size
310 × 270mm
Sample frame load-bearing
≤ 30kg/ layer
Doorknob
Use non-reaction door knob
fast
Navigation
Characteristics of auxiliary structural products characteristics of product selection national standard sheet metal structural equipment characteristics detailed introduction of humidification and dehumidification air supply through bad circuit control safety protection working principle professional terminology implementation standard
Specifications and models
Model one
Model specification
Studio size mm
Form factor mm
Temperature range
DHS-100
450 × 450 × 500
1150 × 1050 × 1750
Azur 20 ℃ ~ 150 ℃
DHS-225
500 × 600 × 750
1200 × 1100 × 1900
Balu 40 ℃ ~ 150 ℃
DHS-500
700 × 800 × 900
1450 × 1400 × 2150
CURV 60 ℃ ~ 150 ℃
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Model two
Volume (in L)
Studio size (D*W*H) mm
Exterior size (D*W*H) mm
100-LH
450 × 450 × 500
1200 × 1000 × 1650
225-LH
500 × 600 × 750
1300 × 1150 × 1900
504-LH
700 × 800 × 900
1450 × 1400 × 2100
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Auxiliary structure
1. Temperature circulation system: the test chamber adopts a special air-conditioned low-noise long-shaft fan motor, which is resistant to high and low temperature stainless steel multi-wing impellers to achieve strength.
Degree convection vertical diffusion cycle
FR constant temperature and humidity testing machine
2. Auxiliary structure: seal: a double-layer high temperature resistant and high tension sealing strip is used between the door and the box to ensure the tightness of the test area.
Door handle: use non-reaction door handle to make it easier to operate
Casters: high quality fixed PU movable wheels are used at the bottom of the machine
3. Observation window (effective field of view): the observation window adopts multi-layer hollow toughened glass, and the inside laminated conductive film is heated for defrosting (clearly observe the test process)
Observation window size: 310 × 270 mm (corresponding volume: 101L, 225L) 430 × 440 mm (corresponding volume: 504L, 800L, 1000L)
4. Test chamber standard configuration: test hole: install 50mm on the left side of the machine for external test power cord or signal cable (aperture and number of holes should be specified separately before ordering)
Second floor of standard sample rack
Sample rack load bearing: ≤ 30kg/ layer
FR constant temperature and humidity testing machine
Equipped with condensed water tray and excluded from the tank
Product characteristics
1. Own independent intellectual property rights and design patents and master the core technology of environmental test chamber
2. The control instrument adopts “you easy to control” UMC1200 imported from Japan, which can be monitored remotely.
3. The refrigeration system adopts the original French Taikang compressor unit, and is equipped with condensate water connecting plate.
4. The core electrical components adopt imported well-known brands such as Schneider.
5. Follow the advanced design concept of foreign environmental test equipment, hydropower separation.
6. shallow trough humidification, novel and unique, drawer type water filling mode, super large water tank design.
7. Front drawer supply water tank: large capacity 50L (portable), including high and low water level indication, removable cleaning.
8. The bottom of the studio is designed with a drainage trough to prevent steam condensation and maximize the protection of the test workpiece.
9. The lighting system adopts Philips kit, the observation window adopts funnel-shaped design, and the observation field is wider.
10. Unique leakage protection design, safer operation
11. Keep improving, focus on every detail, and be more devoted to it
Product selection
Constant temperature and humidity machine is a very professional air purification equipment, non-professionals lack of awareness of it, in the selection often according to the area of the dehumidification place for simple selection. The use places of constant temperature and humidity machines (such as advanced laboratories, purification workshops, etc.) have strict requirements on the temperature and humidity fluctuation range of their equipment. Therefore, the air purification equipment such as constant temperature and humidity machine can not be selected simply according to the area of the site, and the professional supplier of constant temperature and humidity machine represented by Shanghai Shangdai is selected according to the overall wet load of the site. Specifically, the total enthalpy difference and unit time dehumidification / humidification capacity are calculated according to its area, layer height, initial humidity value, target humidity value, indoor tightness, moisture dispersion source, fresh air supply and other comprehensive factors. and the key parameters such as cooling capacity / heating capacity are used for comprehensive selection and matching of constant temperature and humidity machine.
National standard
GB/T2423.3-2006
Sheet metal structure
The box body is machined by CNC machine tool, the shape is beautiful and generous, novel and non-reaction handle, easy to operate.
The inner tank of the box is made of imported advanced stainless steel (SUS304) mirror panel or 304B argon arc welding, and the outer tank of the box is made of A3 steel plate.
The microcomputer temperature and humidity controller is used to control temperature and humidity accurately and reliably.
Large observation windows with lights to keep the box bright, and the use of multi-layer glass, at any time a clear observation of the situation in the box.
It is equipped with an independent temperature limit alarm system, which is automatically interrupted when the temperature exceeds the limit, which ensures the safe operation of the experiment without accidents.
Optional recorder, printer can print and record setting parameters and scan temperature and humidity change curve, 4~20mA standard signal.
What is the principle of the detector in their hands at the explosion-proof gate of the airport?
Current technologies that can achieve early warning by directly identifying explosive molecules include ion mobility spectroscopy, mass spectrometry and fluorescence amplified polymers:
Mass spectrometry explosion detection needs a vacuum environment, can not achieve hand-held or now flexible defense; fluorescence amplification polymer can only react to pre-set explosives such as TNT, DNT, can not fully ensure the safety of the site, can not be used independently in important occasions.
Therefore, although the latter two technologies have certain advantages in sensitivity, their fatal shortcomings limit their commercial development and popularization. Explosive detection equipment based on particle migration spectrum technology is the main explosive detection equipment used in airports and stations.
The sampling methods of ion migration spectrum explosion detection equipment are mainly divided into two kinds: wipe sampling and inspiratory sampling, the basic principle is similar. Any substance in nature has a certain volatility, in any environment, there will be trace molecules emitted into the air, but there are differences in the amount of emission, such as the volatility of sulfuric acid is higher, while the volatility of water is relatively low. the volatility of solids is lower. The target of ion mobility spectrometry detection is the trace explosive molecules volatilized into the air. The detection accuracy can reach the pico level (1 pico = 10-12 grams)
As dangerous goods carriers in the production, handling process, there are bound to be trace dangerous goods molecules left in the hands, and then by passing the explosive molecules to the suitcase handle, pockets and so on. By wiping the brush to wipe the handle of the luggage, passengers’ pockets and other parts of the wipe sample, the instrument can detect dangerous goods molecules, and issue an alarm. The advantage of wiping sampling is that the missing report rate is relatively low, which can quickly identify the carriers of dangerous goods, but the inspection process is relatively tedious, which will slow down the passenger flow speed at the security checkpoint. Inspiratory sampling can ensure the flow rate, but it is more difficult to obtain explosive molecules by inhaling than wiping, so the safety is lower than that of wiping sampling. Both methods require a data analysis process of about 2 to 10 seconds, and once dangerous goods are detected, passengers in front of them need to be recalled to unpack.
To put it simply, the ion transfer spectrum technology means that the time of migration in the electric field and the instantaneous speed of migration to the sensor at the end of the electric field will be different due to the difference of mass and charge of different molecules after ionization. according to the parameters of time and speed, it can be compared with the database to detect whether the ion belongs to dangerous goods ion.
In fact, ion mobility spectrometry technology not only detects explosives, but also detects all dangerous goods, including explosives, drugs and so on. Generally speaking, the drug is a positive charge and the explosive is a negative charge, so the explosion detector is usually designed with two channels, resulting in longer detection time.
What is the principle of airport security and explosion protection?
Mass spectrometry explosion detection needs a vacuum environment, can not achieve hand-held or now flexible defense; fluorescence amplification polymer can only react to pre-set explosives such as TNT, DNT, can not fully ensure the safety of the site, can not be used independently in important occasions.
Therefore, although the latter two technologies have certain advantages in sensitivity, their fatal shortcomings limit their commercial development and popularization. Explosive detection equipment based on particle migration spectrum technology is the main explosive detection equipment used in airports and stations.
The sampling methods of ion migration spectrum explosion detection equipment are mainly divided into two kinds: wipe sampling and inspiratory sampling, the basic principle is similar. Any substance in nature has a certain volatility, in any environment, there will be trace molecules emitted into the air, but there are differences in the amount of emission, such as the volatility of sulfuric acid is higher, while the volatility of water is relatively low. the volatility of solids is lower. The target of ion mobility spectrometry detection is the trace explosive molecules volatilized into the air. The detection accuracy can reach the pico level (1 pico = 10-12 grams)
As dangerous goods carriers in the production, handling process, there are bound to be trace dangerous goods molecules left in the hands, and then by passing the explosive molecules to the suitcase handle, pockets and so on. By wiping the brush to wipe the handle of the luggage, passengers’ pockets and other parts of the wipe sample, the instrument can detect dangerous goods molecules, and issue an alarm. The advantage of wiping sampling is that the missing report rate is relatively low, which can quickly identify the carriers of dangerous goods, but the inspection process is relatively tedious, which will slow down the passenger flow speed at the security checkpoint. Inspiratory sampling can ensure the flow rate, but it is more difficult to obtain explosive molecules by inhaling than wiping, so the safety is lower than that of wiping sampling. Both methods require a data analysis process of about 2 to 10 seconds, and once dangerous goods are detected, passengers in front of them need to be recalled to unpack.
To put it simply, the ion transfer spectrum technology means that the time of migration in the electric field and the instantaneous speed of migration to the sensor at the end of the electric field will be different due to the difference of mass and charge of different molecules after ionization. according to the parameters of time and speed, it can be compared with the database to detect whether the ion belongs to dangerous goods ion.
In fact, ion mobility spectrometry technology not only detects explosives, but also detects all dangerous goods, including explosives, drugs and so on. Generally speaking, the drug is a positive charge and the explosive is a negative charge, so the explosion detector is usually designed with two channels, resulting in longer detection time.
This is the end of the introduction of the explosion-proof box opener. Thank you for taking the time to read the contents of this site. Don’t forget to look for more information about the manufacturer and price of the explosion-proof chassis and the explosion-proof box opener on this site.