IEC60068-2-1 Walk-in Temperature And Humidity Environmental Testing Chamber 12m³

20%RH～98%RH

Refrigeration: 4.5KW*2 pcs = 9 KW

Heating: 12KW

Humidification: 12KW

Motor: 0.75KW*6=4.5W

Others: ≈1.5KW

Total installed power: Pmax≤39KW (subject to final design)

Method: Water cooling. It’s stable and low noise. Domestic well-known brand.

Flowmeter: 15T/h

Tap water requirements: Water pipe: 1/2 "water pressure: 0.3 ~ 0.6Mpa

Ambient temperature: 5℃~+35℃, relative humidity: ≤90% RH

There should not be high concentrations of components, corrosive gases and flammable and explosive atmospheres around

AC380V±10%, 50HZ±1HZ, three-phase five-wire system

The power cable lead hole is at the lower right rear of the test chamber

The test chamber and the refrigeration unit are of split design. After the equipment is installed in place, the refrigeration pipeline and electrical circuit are connected and checked before starting the machine.

The controller adopts an independent control cabinet and is installed on the right side of the laboratory.

The equipment adopts a split type, and the refrigeration unit and electrical control cabinet are installed on the right side of the equipment.

The connection between the box body and the unit adopts explosion-proof junction box and galvanized steel pipe, and the connection process conforms to the relevant national standards for explosion-proof.

The inner wall is made of 1.2mm SUS304 stainless steel plate, and all unsealed TIG are continuously welded to ensure no leakage after long-term test.

The bottom plate is a stainless-steel pattern anti-skid plate with a load-bearing capacity of ≥300kg/m2 (uniform load).

The bottom of the box bottom is partially treated and solidified. Reinforced bottom structure. The thermal insulation performance of the floor thermal insulation layer and the box wall. The top plate is consistent, and drainage ditches are reserved at the bottom.

The air duct is located behind the studio:

The explosion-proof motor is installed on the top of the box, the aluminum centrifugal fan impeller is installed on the top of the test box, and the air is evenly supplied through the air outlet of the volute to meet the requirements of temperature uniformity.

1. Set up 2 split doors, the size of the door opening (800+800) W×2000Hmm

2. The door is sealed with double-layer high and low temperature resistant soft silicone rubber sealing strip

3. Rotary hinge can ensure the door opening angle ≥ 120 degrees

4. The inner edge of the door is set with a constant temperature heating belt, and the control system automatically turns on the heating belt to defrost according to the studio temperature.

Two sets of visual observation windows (400×500mm) are installed on the gate. The observation window glass is made of multi-layer insulating glass coated with electric heating film. The observation window has high light transmittance, good heat insulation effect, and no resistance wire on the glass surface. Observation and other advantages, when the studio temperature is lower than the ambient temperature, the control automatically turns on the defogging function of the observation window.

1. The motor adopts professional motor: 0.75KW, 6 sets of IP55

2. The fan volute is made of aluminum to prevent sparks from friction between the impeller and the volute;

3. Both the inner and outer casings are provided with reliable grounding lines, and the surface of the equipment is sprayed with conductive anti-static paint to ensure that no static electricity can accumulate on the surface of the equipment casing.

4. The temperature sensor (PT100) adopts explosion-proof sensor.

5. The heating device is a stainless-steel heater without an open flame.

6. The wiring of explosion-proof electrical appliances meets the national explosion-proof requirements.

7. Set up an independent over-temperature protector, that is, a two-section temperature protection instrument, to prevent the danger of overshooting of the temperature in the work room.

1. Nickel-chromium alloy heating wire heater

2. Heater control mode: non-contact equal period pulse width adjustment, SSR (solid state relay)

3. Heater power: ≤12.0KW

The automatic water replenishment device is adopted. After connecting the tap water with a 1/2" water pipe, the water supply device is an international famous brand, which can automatically filter and deionize the water.

Demineralized water flow: 10L/h

Water pressure: 0.1～0.25Mpa

Water hardness: ≤0.03mol/L (1.5mg/L, calculated as CaCO3) m, the national standard for humidification water, to provide the deionized water required for the humidification part of the equipment

New refrigerants that meet international environmental protection requirements:

1. High temperature grade: R404A

2. Low temperature grade: R23

1. The main configuration of the refrigeration system adopts imported components from Europe and the United States. For the specific configuration, see the main configuration list of the equipment;

2. Danfoss stainless steel brazed plate heat exchanger is used as the evaporative condenser of the cascade refrigeration system, with small heat transfer temperature difference, high heat exchange efficiency and compact appearance;

3. In order to prevent the defrosted water on the compressor from flowing freely, a water receiving tray is installed under the compressor, which is collected and discharged in a centralized manner;

4. Equipped with a pressure gauge to display the system pressure, which is convenient for the inspection and maintenance of the refrigeration system

In order to reduce the noise in the laboratory, a comprehensive scheme of internal noise reduction of the unit and shock absorption of the compressor is adopted.

1. Compressor damping

1.1 Install shock-absorbing springs and rubber pads at the bottom of the compressor to reduce the transmission of compressor vibration to the unit frame through the base;

1.2 The compressor suction and exhaust pipes use metal shock-absorbing hoses from American Packless or Italian Castel to reduce vibration transmission through the pipes.

1.3 Compressor process pipeline adopts shock-absorbing bend and distal fixation to avoid resonance

2. Muffler in the unit;

The unit enclosure is pasted with sound-absorbing cotton. Since the interior of the unit needs ventilation and heat dissipation, in order to reduce the air transmission of noise, sound baffles with oil-absorbing sound-absorbing cotton are installed at the air inlet and outlet to reduce the transmission of sound waves to the room through the ventilation holes.

1. The heating device is explosion-proof armored heater

2. The solid-state relay is used for non-contact zero-crossing start-up to drive the heater to work, without contact sparks and noise, and has a long service life.

Using Korean "Sanyuan" TEIM 2700 color touch screen controller, the main features are as follows:

1. 7-inch TFT true color touch screen, the man-machine interface can be selected in Chinese or English, and the menu operation method makes it easy for users to master the operation method of the equipment;
2. Display accuracy: temperature 0.1℃; time 0.1min
3. Two test methods can be selected: constant temperature (manual operation) or program (ie, preset program automatic operation)
4. The equipment operation has a high degree of automation. Set the target temperature or preset equipment operation procedures. After the operation button is activated, the system can automatically determine whether to open the refrigeration unit, heater or blower. Colleagues can automatically adjust the heating output without excessive user operations or monitoring, the ideal test process curve can be obtained.
5. The preset program running function provides users to preset 1000 program curves, each curve can be set up to 100 steps, 6 groups of small cycles, and 10 different programs can be linked, and the program can be retrieved and stored for the next test. can be called directly.
6. During the test, important reference parameters such as current target temperature, measured temperature, heating output, running time, and program running process can be displayed in real time.
7. It can store temperature curves and data for 600 days.
8. Fault self-diagnosis function, when the equipment fails, it will automatically alarm and cut off the power supply. Colleagues will display the fault phenomenon and simple fault description on the controller, and users can easily find the cause according to the fault.

1. USB data recording function:

2. You can directly insert any U disk anywhere in the history record file, and perform operations such as reading and analysis on the computer.

3. Powerful PC software functions, standard 10M/100M Ethernet interface, automatic IP address acquisition, network identification, and easy control.

3.1. Host computer:

The host computer is directly connected to a test box through a network cable

3.2 LAN:

Multiple computers and multiple UMC1000 control area LAN connections

3.3 WEB SERVER remote synchronization;

Remote monitoring can be performed through the INTERNET NET test.

1. Personnel safety

1.1 leakage protection

2. Equipment safety:

2.1 power supply phase loss, phase error, voltage instability protection;

2.2 Control loop current limiting protection

2.3 Fan motor overload protection

2.4 Compressor current overload protection

2.5 compressor overheating protection

2.6 Compressor high pressure protection

2.7 heater short circuit protection

2.8 Equipment leakage protection

2.9 Secondary independent over-temperature protection function

Temperature: 5℃～35℃

Relative humidity: ≤85

Atmospheric pressure: 80-106 kPa

There is no strong vibration around;

No direct sunlight or direct radiation from other heat sources;

No strong air flow: when the surrounding air needs to be forced to flow, no air flow is directly blown to the box;

There is no strong electromagnetic field around;

There is no high concentration of dust and corrosive substances around.

Voltage and frequency: AC380V±10%, 50Hz, three-phase four-wire + protective ground wire

Grounding resistance of protective ground wire: The grounding resistance of protective ground wire is less than 4Ω