High and low temperature environment test chamber

Automotive high and low temperature environment test chamber Acceptance andsatisfiableStandard:GB2423.1-93 Basic Environmental Testing Procedures for Electrical and Electronic Products - Test A: Low Temperature Test Method、GB2423.2-93 Basic Environmental Testing Procedures for Electrical and Electronic Products - Test B: High Temperature Test Method、GB2423.3-93 "Basic Environmental Testing Procedures for Electrical and Electronic Products" Test Ca: Constant Damp Heat Test Method.

The technical level of the high and low temperature environment test chamber is determined by the configuration of the refrigeration system, control accuracy, and structural design. The selection should comprehensively consider the temperature range, uniformity index, and reliability requirements to ensure that the equipment performance matches the testing requirements accurately. The choice of core component brand directly affects the lifespan and long-term stability of the equipment.

1、 Core system composition

1. Structural system

Studio material: SUS304 stainless steel plate, thickness 1.2mm

Shell material: cold-rolled steel plate with double-layer epoxy resin spray coating, thickness 1.0mm

Insulation layer: high-density glass fiber cotton, thickness 100mm

Sealing design: High and low temperature resistant silicone rubber sealing strip

Observation window: Three layer hollow electric heating membrane anti frost glass

Test hole: diameter 50mm, with sealing cover

Cable interface: Waterproof gland head

2. Refrigeration system

Refrigeration method: mechanical compression refrigeration

Refrigeration cycle:

Single stage compression refrigeration (-20 ℃~+150 ℃)

Cascade compression refrigeration (-40 ℃~-70 ℃)

Compressor: Semi closed piston compressor

Condenser: air-cooled finned heat exchanger

Evaporator: Copper tube aluminum fin heat exchanger

Throttle device: thermal expansion valve

Refrigerant: R404A/R23

3. Heating system

Heating element: Nickel chromium alloy electric heating wire

Installation method: Stainless steel protective sleeve

Control method: SSR solid-state relay PID regulation

Safety protection: Fused over temperature protection

4. Air circulation system

Fan type: Multi blade centrifugal fan

Motor power: 90W

Blade diameter: 200mm

Wind speed: adjustable from 0.5-1.5m/s

5. Control system

Main controller: Programmable temperature controller

Display interface: 7-inch color touch screen

Temperature sensor: PT100 platinum resistor

Control algorithm: PID control (with self-tuning function)

Program capacity: 120 sets of programs, with 100 segments per set

Communication interface: USB, RS-485

Data recording: Built in storage, supports USB drive export

2、 Main technical parameters

1. Temperature parameters

Temperature range: -70 ℃ to+150 ℃

Temperature fluctuation: ± 0.5 ℃

Temperature uniformity: ± 2.0 ℃

Heating time:+25 ℃ →+150 ℃ ≤ 45 minutes

Cooling time:+25 ℃ → -70 ℃ ≤ 90min

2. Structural parameters

Internal volume: 80L-1000L (standard series)

Internal dimensions: customized according to volume

Power supply voltage: AC220V/380V ± 10% 50Hz

Maximum power: 4.5-25kW

Weight: 280-800kg

3、 Performance indicators

1. Temperature performance

Stability: Continuous operation for 24 hours, temperature fluctuation ≤ 0.5 ℃

Uniformity: 9-point test in workspace, temperature difference ≤ 2.0 ℃

Accuracy: The deviation between the displayed value and the measured value is ≤± 1.0 ℃

2. Reliability indicators

Average time: ≥ 5000 hours

Compressor lifespan: ≥ 50000 hours

Continuous operation capability: ≥ 720 hours

3. Security protection system

Electrical safety:

Leakage protection switch

Overcurrent protector

short circuit protection

Equipment safety:

Compressor overpressure/overheat protection

Heater overheat protection

Fan overload protection

Cooling fan interlock protection

Sample safety:

Independent over temperature protector

Temperature upper limit protection

Temperature lower limit protection

4、 Manufacturing and Inspection Standards

1. Design standards

GB/T 10592-2008 Technical Conditions for High and Low Temperature Test Chambers

IEC 60068-2-1 Test A: Low Temperature

IEC 60068-2-2 Test B: High Temperature

2. Inspection items

Insulation resistance test: ≥ 2M Ω

Voltage endurance test: 1500V/10mA/60s

Leakage current test: ≤ 3.5mA

Grounding resistance test: ≤ 0.1 Ω

Temperature performance test (empty/full load)

Security protection function verification

5、 Environmental requirements for use

Environmental temperature:+5 ℃~+35 ℃

Environmental humidity: ≤ 85% RH

Power supply fluctuation: ± 10% of rated voltage

Ventilation requirement: A space of ≥ 500mm around the equipment

Ground bearing capacity: ≥ 500kg/m?

High and low temperature environment test chamberperformance metrics：

1. Temperature range: A: -20 ℃~150 ℃ B: -40 ℃~150 ℃ C: -60 ℃~130 ℃ D: -60 ℃~130 ℃

2. Humidity range: 20~98% R.H

3. Fluctuations/Uniformity: ≤± 0.5 ℃/± 2 ℃

4. Temperature deviation:+2%, -3% R.H

5. Heating time: 2 ℃~3 ℃/min (no load)

6. Cooling time: 0.7 ℃~1 ℃/min (no load)

High and low temperature environment test chamberRange of degrees

A型：0℃～+100℃(+150℃)

Type B：-20℃～+100℃(+150℃)

Type C：-40℃～+100℃(+150℃)

D-type：-70℃～+100℃(+150℃)

High and low temperature environment test chamberDegree control system：

1. Controller: Imported "TEMI880" microcomputer temperature integrated controller (temperature directly displays percentage)

2. Accuracy range: Temperature ± 0.1 ℃

3. Temperature sensor: Platinum resistance PT100 Ω

4. Heating system: Nickel chromium alloy electric heating heater

5. Refrigeration system: Fully enclosed air-cooled single-stage compression refrigeration/Original French "Taikang"/Fully enclosed air-cooled cascade compression refrigeration

6. Circulating system: High temperature resistant and low-noise centrifugal motor, multi blade centrifugal fan

High and low temperature environment test chamberBox material：

1. Outer box material: A3 steel plate, surface phosphating electrostatic spraying

2. Inner box material: SUS304 stainless steel 2B grade light plate

3. Insulation material: Ultra thin and ultra-fine glass fiber

4. Door frame insulation: double-layer high and low temperature aging resistant silicone rubber door sealing strip

Automotive high and low temperature environment test chamberPurpose:Also known as high and low temperature aging chamber,Used for reliability testing of industrial products at high and low temperatures. Inspect the performance indicators of components and materials of electronic and electrical products, automobiles and motorcycles, aerospace, ships, universities, research institutions and other related products under high and low temperature (alternating) cyclic changes.