high and low temperature test chamber

Technical proposal of high and low temperature test chamber WSD-8101

First, performance indicators:

1. Product name: high and low temperature alternating humidity and heat test chamber

2. Sample restrictions:

This test equipment is prohibited:

Test and storage of samples of flammable, explosive and volatile substances

Testing and storage of corrosive substance samples

Testing or storage of biological samples

Test and storage of samples from strong electromagnetic emission sources

3. Volume and size:

3.1 Nominal content product (L) : 225L

3.2 Nominal inner box size (mm) : D600×W800XH850

3.3 Water: The back of the box will automatically add water (the water pressure is controlled at about 3 kg) or open the water tank manually

4. Performance:

4.1 Test Environment Conditions:

The airflow around the equipment is smooth, no high concentration dust, no corrosive or flammable and explosive gas

Ambient temperature: 5 ~ 28℃

Relative humidity ≤85%RH

4.2 Test Method:

4.2.1 Temperature limit range: -40℃ ~ +150℃

The recommended long-term operating temperature range is -30 ° C to 120 ° C

4.2.2 Temperature fluctuation: ±0.5℃

4.2.3 Temperature deviation: ±2.0℃

4.2.4 Temperature change rate:

4.2.4.1 Heating rate: 3℃~4℃/ min (non-linear no-load)

4.2.4.2 Cooling Rate: 0.7℃~1℃/ min (nonlinear no-load)

4.2.5 Humidity range: 30% ~ 98%RH (+20℃~+85℃) (refer to the controllable temperature and humidity range shown in the figure below)

4.2.6 Relative humidity deviation:

±3.0%RH (humidity > 75%RH)

±5.0%RH (humidity ≤ 75%RH)

The above indicators are tested without sample load in the box (except for special instructions).

4.2.7 Meet the test standards:

GB/T2423.1-2001 Test A: Low temperature test method

GB/T2423.2-2001 Test B: High temperature test method

GB/T2423.3-1993 Test Ca: Constant damp heat test

GJB150.3-1986 High temperature test

GJB150.4-1986 Low temperature test

Second, function introduction:

1. Structural features:

1.1 Insulation enclosure structure:

Outer wall: high-grade steel spray

Inner wall: SUS304 stainless steel plate

Insulation material: ultrafine glass fiber

1.2 Air conditioning channels:

Fan, heater, evaporator (and dehumidifier), drainage device, humidifier, dry burning preventer, wet bulb temperature, sensor, wet bulb sink

1.3 Standard configuration of laboratory body:

1.3.1 Single door opening

1.3.2 The door is equipped with an electrically heated anti-condensation hollow glass observation window

1.4 Control Panel (on the distribution control cabinet) :

Temperature (humidity) control display, operation button, overtemperature protection setting device, lighting switch

1.5 Machinery Room:

The mechanical room includes: refrigeration unit, drainage device, fan, distribution control cabinet, humidification and humidity measuring water control device

1.6 Distribution control cabinet:

Heat dissipation fan, buzzer, power distribution board, temperature and humidity recorder (optional), RS-232 physical interface (to be purchased with centralized monitoring software)

1.7 Heater:

1.7.1 Heater material: stainless steel fin seamless heating tube

1.8 Humidifier:

1.8.1 Humidification Method: Use an external humidifier

1.8.2 Humidifier quality: stainless steel

1.8.3 Humidifier control mode: contactless periodic pulse width adjustment, SSR (solid state relay)

1.8.4 Humidifier device: water level control device, heater anti-dry burning device

2. Refrigeration system:

2.1 Working mode: air-cooled mechanical compression single-stage refrigeration

2.2 Refrigeration compressor: piston compressor

2.3 Evaporator: finned heat exchanger (double as dehumidifier)

2.4 Evaporative condenser: brazed plate heat exchanger

2.5 Control mode of refrigerator:

2.5.1 The touch screen (programmable logic controller) automatically adjusts the operating conditions of the refrigerator according to the test conditions

2.6 Refrigerant: R404A/R23 (ozone loss index is 0)

2.7 Others:

2.7.1 The main components are made of international high-quality brand products

2.7.2 Compressor cooling fan

3. Electrical control system:

3.1 Temperature and Humidity controller (model) : Taiwan "Velen" TH4310

3.2 Display: 4.3-inch true color LCD display

3.3 Operation mode: program mode, fixed value mode

3.4 Setting Mode: Chinese menu, touch screen input

3.5 Program Capacity: Editable: 20 programs. Each program has a maximum of 50 steps and can have 20 loops

(Maximum 99 cycles per cycle step)

Fixed: 10 programs, programs can be linked

3.6 Setting Range: Temperature: Adjust according to the temperature working range of the equipment (upper limit +5℃, lower limit -5℃)

Humidity: (0 ~ 100) % RH(Temperature and humidity test equipment)

3.7 Resolution: Temperature: 0.1℃; Time: 0.1min;

Humidity: 0.1% RH(temperature and humidity test equipment)

3.8 Input: Thermocouple

3.9 Communication Function (Optional) : RS-485 interface,

3.10 Auxiliary functions: fault alarm and cause, processing prompt function, power off protection function, upper and lower limit temperature protection function, timing function (automatic stop operation).

3.11 Temperature and humidity measurement: Temperature: PT100 thermocouple; Humidity: Wet and dry bulb thermometer method (wet and hot type)

4. Supply water to the hot and humid system

4.1 External water supply: distilled water, pure water, deionized water (resistivity greater than 500Ω·m) (user provided)

4.2 Internal Water Supply: Lift the water pump

4.3 Location of the water supply device: Connect the pipe at the back of the box or manually add water directly

4.4 Water storage tank volume: 10L

5. Safety protection device

5.1 Refrigeration system:

5.1.1 Compressor Overpressure

5.1.2 Compressor motor Overheats

5.1.3 Compressor motor overcurrent

5.2 Humidification system:

5.2.1 Dry burning of heating tube

5.2.2 Abnormal Water Supply

5.2.3 Abnormal Drainage

5.3 Laboratory:

5.3.1 Adjustable overtemperature protection

5.3.2 The limit Overtemperature of the air conditioning channel

5.3.3 Fan motor overheating

5.4 Others:

5.4.1 Total power supply phase sequence and phase loss protection

5.4.2 Leakage protection

5.4.3 Load Short-circuit Protection

6. Other configuration:

Power cable: 5-core (4-core cable + protective ground cable) 1 cable (2.5m long)

7. Purchase accessories (functions) : when necessary, the contract or technical agreement is specifically stated

7.1 Lead hole: The lead hole has a diameter of φ50mm, the number of 1, its position can be allowed in the box structure and does not affect the performance of the condition can be customized according to user requirements.

8. Conditions of Use (The User guarantees the following conditions) :

8.1 Venue:

8.1.1 Ground level, good ventilation, free of flammable, explosive, corrosive gases and dust

8.1.2 There is no source of strong electromagnetic radiation nearby

8.1.3 There is a floor drain near the equipment (within 2 meters from the refrigeration unit)

8.1.4 Ground bearing capacity: not less than 500kg/m2

8.1.5 Reserve proper maintenance space around devices

8.2 Environmental Conditions:

8.2.1 Temperature: 5℃ ~ 28℃

8.2.2 Relative humidity: ≤ 85%RH

8.2.3 Air pressure: 86 ~ 106kpa

8.3 Power Supply: AC380V three-phase four-wire + PGND cable

8.3.1 Allowable voltage fluctuation range: AC (1±10%) 380V

8.3.2 Allowed frequency fluctuation range: (1±1%) 50Hz

8.3.3 The grounding resistance of the PGND cable is less than 4 OhMs. Power supply in TN-S mode or TT mode

8.3.4 The user is required to configure the air or power switch of the corresponding capacity for the device at the installation site, and the switch must be independent and dedicated for the device

8.3.5 Power Capacity: 4.5KVA

8.4 Requirements for the Storage Environment:

8.4.1 When the device is not working, the ambient temperature should be kept within +0 ° C to 35 ° C

High and low temperature alternating wet heat test chamber main parts detail

NO.

Part name

Gauge lattice

brand

1

Temperature and humidity controller

TH4310

Taiwan screen

2

compressor

Model 2480 or 2511

Taican

3

refrigerant

R404a Environmental refrigerant

Honeywell USA

4

capillaries

Inside diameter 1.0

Kawamura

5

Solenoid valve

1028/3

Italian CASTEL

6

Filter dryer

EK-083S

Emerson

7

condenser

custom

Taiwan Zhongli

8

evaporator

custom

Taiwan Zhongli

9

humidifier

1.5KW stainless steel

Nantong Baiyun

10

Humidifier anti-dry burn switch

TS-120SF-C

South Korean RAINBOW

11

Solid-state relay

SSR-40DA

Goodall

12

Air switch

C65

Chint

13

relay

MY2N1 AC220V

Japanese Omron

14

Ac contactor

LC1-E Series

Chint

15

Thermal relay

LRE Series

Chint

16

Platinum sensor

PT100 ￠5 SUS304

Shanghai Shengmin

17

Antifreeze observation window

Transparent electrothermal film hollow tempered glass

Humen Teli

18

Test hole assembly

Diameter 50mm

Qidong white cloud

19

Refrigerant oil

3GS

American ice bear

20

Oil separator

S4004

ESK Germany