| Product name | Walk-in Constant Temperature and Humidity Test Chamber |
| Mode | SN881-22m3 |
| Effective volume | 22m³ |
| Inner box size | W4500 mm*H2270 mm*D2200mm |
| Outer box size | About W5100 mm*H3700 mm*D2800 mm(Excluding unit size) Reminder: Please refer to the final design and confirm the three
views for the external dimensions |
| Performance |
| Cooling method | Water cooling |
| Temperature range | 10°～ 80℃ |
| Humidity range | 20%-90%RH |
| Temperature /humidity fluctuation | ±2℃ / ±2.0%RH |
| Temperature control accuracy | +/- 0.5C |
| Humidity control accuracy | +/- 3% |
| Temperature uniformity | ≤2℃ |
| Heating time | From 10°C to 80°C, full-scale non-linearity averages about
2K/minute without load |
| Cooling time | From 80°C to 10°C, full scale non-linearity averages about
2K/minute without load |
| Temperature rise and fall overshoot | ≤±1℃ |
| Schematic diagram of temperature and humidity | 
PS: Standard humidity 20%~95%HR |
| Structure and material |
| Outer box material | Adopt advanced cold and hot steel plate non-static nano-baking
paint |
| Inner box material | SUS304 stainless steel plate |
| Thermal insulation materials | High temperature and fire-resistant rigid polyurethane foam |
| Door frame sealing strip | Silicone rubber sealing strip |
| Chamber door | Double-leaf doors open outside, the door frame and the edge of the
door panel are equipped with electric heating devices and overflow
ditch |
| Electric heating glass observation window | Quantity: 2 Location: On the door of the test room (or the place designated by
the customer) Form: 3-layer vacuum strengthened glass with built-in anti-fogging
heating element |
| Lighting | High and low temperature resistant explosion-proof energy-saving
lamp |
| Pressure balance port | All aluminum alloy with anti-sweat line 4 sets of self-resetting
pressure windows |
| Weight bearing | Laboratory load: 500KG |
| Sample hole |
A hole with a diameter of φ100mm on the left side chamber wall and
equipped with a rubber isolation plug and a rubber cover at the
same time.
|
| Non-slip floor |
The floor adopts a 4.0mm stainless steel non-slip design to prevent
personnel from being injured during internal operations.
|
| Drainage | The floor is designed with a drainage tank, and the test chamber has no water inside after the end of high
temperature and humidity test |
| Foot cup |
The foot cup of the electric box adopts silica gel pad to absorb
shock and protect the compressor and copper pipe welding
|
| Noise of the whole machine | ≦80dB |
| Air conditioning system |
| Constant temperature method | Adopt cold balance method |
| Air cooling method | Cascade compressor refrigeration |
| Circulating motor | Taiwan Tatung Low Voltage Induction Motor |
| Sensor | With temperature and humidity measurement sensor and controller PT100 platinum resistance sensor |
| Wind wheel | Multi-wing centrifugal circulating fan, high and low temperature
resistant aluminum alloy blade |
| Refrigerating system |
| Cooling method | Original imported cascade silent type, high efficiency and energy
saving compressor |
| Compressor |
Original imported German Bitzer semi-hermetic compressor. 2 sets of 6HP compressors
|
| Refrigerant |
Non-fluorine environmental protection HFC404A (Honeywell) and
DuPont R23 refrigerant
|
| Condenser |
High-efficiency shell and tube type (water cooling)
Equipped with cooling water tower (well-known brand) and pipeline
|
| Evaporator | High-efficiency multi-section fin evaporator with hydrophilic
membrane (thickened fin)
|
| Oil separator |
Emerson AW
|
| Expansion valve |
Danfoss Thermal Expansion Valve
|
| Solenoid valve |
Japan Saginomiya and Danfoss
|
| Other accessories |
All high-quality products of the first international brand
(pictured on the right: drying filter)
|
| Dehumidification | Freezing and dehumidifying by the refrigeration system (the air in
the box passes through the evaporator below the dew point
temperature, and water is precipitated). *Choose evaporator fins with hydrophilic membrane treatment, better
dehumidification performance, because the water tension of the
hydrophilic membrane aluminum fins is small, the water droplets
from air condensation are easy to slip off, and it is not easy to
produce obstructive water bridges in the fin gap. Thereby greatly
improving the dehumidification efficiency!
|
| Heating and humidification system |
| Heating method | Electric heating |
| Steam supply method | Open direct injection, the inside of the generator is directly
connected to the test chamber, keeping the internal pressure close
to zero |
| Heating tube | Stainless steel finned nickel-chromium alloy electric heating tube,
heating tube anti-MC adhesion design, heater connection,
heat-resistant wire is used, the heater is placed in the
circulating air duct on the top of the box, and fire-resistant and
heat-insulating materials are added around it
|
| Humidification tube |
A) The humidification cylinder (boiler method) is used for
humidification, which is faster than the traditional surface
humidification (water pan type) and has higher control accuracy. In the box It will not produce impurity pollution such as scale, has good
low-humidity performance, and is easy to clean. B) The humidification tube adopts all stainless-steel seamless
casing, the insulation resistance is greater than 50MΩ, and has a
dry-burn prevention controller C) The humidification cylinder is made of stainless steel and has a
water level observation window. D) Low temperature with dry air
|
| Humidification boiler | Installed inside the machine room |
| Humidification water treatment | Equipped with a dedicated water softening device, which can
effectively remove impurities in the water (1 set of pure water
recovery system device, with activated carbon filter to filter
water impurities). |
| The main components of the control circuit |
The main components of the control circuit are all high-quality
brands
|
