Mask machine high and low temperature testing machine

Part I: the overall composition of the system

The system consists of the following parts: the test chamber is used to provide a constant high and low temperature humidity, alternating high and low temperature humidity test environment; including refrigeration system, heating system, humidification / dehumidification / water system, Road system, control system, system safety protection device, etc .

Part II: Main technical indicators of the test chamber

· Studio size: 500x500x600mm (depth x width x height);

· Dimensions: 1030 * 1070 * 1500mm (depth x width x height)

· Temperature range: -20 ℃-+ 150 ℃;

· Temperature fluctuation: ≤ ± 0.5 ° C;

· Temperature uniformity: ≤ ± 1 ℃;

· Temperature deviation: ≤ ± 2 ℃;

· Temperature rising and falling rate: from + 20--40 ℃, about 60min from + 20100 ℃, about 40min

· Humidity range: 20% 98% R. H (AT + 25 ℃ ~ + 85 ℃)

· Humidity error: + 2 / -3% R. H (up to 75% R. HL), + 5% R. H (below 75% R. H)

· Wind speed: 1. 7-2. 5m / s;

The above indicators are measured under ambient temperature ≤25 ℃, normal pressure, no load, and 1/6 space from the inner wall of the box;

· Power: about 3. 8Kw;

· Power supply: 220V ± 10% V; 50Hz;

Meet relevant standards and test methods:

· GB / T2423. 22-87Nb

· GJB1032-90

· MIL-STD-2164 / (E / C)

· GB / T2423. 4-93

· GB / T2423. 34-86

· GJB150. 9-86

Part III Description of the design and manufacturing program of the programmable high and low temperature damp heat test box

Test box body:

Structure

Integral structure, that is, the test box, refrigeration system, heating / humidification system, air conditioning system, electrical control cabinet, and refrigeration unit as a whole. The refrigeration unit is located at the bottom of the cabinet, and the electrical control part is placed on the side of the test box, which is convenient operating.

Cabinet

a) In the air duct interlayer at one end of the working room, heating / humidifier, refrigeration evaporator, blower motor, fan blade and other devices are distributed;

b) There is one cable threading hole on the side of the test box, the size is Φ50mm; m

c) The test chamber studio is made of 1mm thick SUS304 stainless steel plate, and the cabinet shell is made of 1mm thick high-quality stainless steel.

d) The insulation material is made of polyurethane foam with a thickness of 100mm, which has a good thermal insulation effect.

e) The studio is equipped with two layers of adjustable stainless steel strip shelves;

f) The box body is equipped with condensate drain.

Gate

For single-open doors, double-line silicone rubber sealing strips are used for door sealing

Observation and lighting device

A multi-layer insulating glass observation window is installed on the gate, with a size of about 300x275mm, and a heating and frost protection device. Install a (AC12V) 20W halogen lamp on the door of the test chamber.