Homemade nitrogen gas cabinet

1.1 Purpose

    The function of the intelligent self-made nitrogen gas cabinet is to provide a closed storage space with normal temperature, low humidity and low oxygen, which is moisture-proof, dry, and anti-oxidation and meets the requirements of related storage products, in line with the international IPC/JEDECJ-STD-033B standard, and better for long-term preservation. It is suitable for storage of various types of processing and assembly, MSD packaging, SMT semiconductors, wafer chips, electrical engineering, electronic products, chemical medicine, scientific research institutions, laboratories, weapons industry, nuclear industry, aerospace, etc.

1.2 System

   The N2 storage cabinet includes a cabinet, a temperature and humidity display control system, a self-made nitrogen system, a dehumidification module, automatic nitrogen replenishment, a controller calibration reminder, a safety protection device, etc. Memory temperature control dehumidification, data storage, and a dual sensor control system can also be selected according to actual needs.

1.3 Features

    Amester has mastered the core technology, engineers have accumulated many years of R&D experience, and the control system is developed by itself. The intelligent control system is designed and manufactured using good environmental model technology, dual humidity sensors, and energy-saving adjustment technology. Compared with ordinary N2 cabinets, it can save 100% of nitrogen consumption, has good sealing, easy maintenance, and beautiful box; it has the advantages of simple operation, high degree of automation of the control system, stable system operation, and long trouble-free operation time.

1.4 Introduction

    Our company is committed to moisture-proof drying, anti-oxidation storage, intelligent baking, environmental temperature and humidity testing of various products. The main products include moisture-proof boxes, drying cabinets, constant temperature and humidity boxes, temperature and humidity control cabinets, low-temperature storage cabinets, constant temperature storage cabinets, programmable constant temperature and humidity test chambers, drying storage boxes, anti-oxidation storage cabinets, intelligent ovens, clean ovens, oxygen-free ovens, vacuum ovens, vacuum drying and degassing boxes and other multifunctional intelligent equipment; for many years, we have served major well-known domestic and foreign companies, universities, quality inspection institutions and have been recognized and praised by users.

    We firmly believe that only by insisting on good quality can we win the future. We use first-line brands for core components, strictly control the supply channels, and manage production to the extreme. We insist on using quality to win the market and serve global users.  

1.5 Various types of compliance standards

IPC/JEDECJ-STD-033B Humidity Sensitive Storage Standard

1.6 Model Overview

Model: AMST-1400ZN-4

Other models available: AMST-240ZN, AMST-320ZN, AMST-450ZN, AMST-540ZN, AMST-730ZN, AMST-900ZN, AMST-1400ZN-4, AMST-1400ZN-6

1.7 Recommended usage conditions

Ambient temperature: 0℃～40℃

There should be no strong airflow, high concentration of dust, corrosive gas, etc. around.

Voltage: AC 220V±10%; Frequency: 50Hz±5%;

Meet the equipment installed capacity requirements

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2.1 Studio Capacity

 1196mm×670mm×1700mm (W×D×H)

2.2 Dimensions

 1200mm×700mm×1880mm (W×D×H)

2.3 Humidity control range

 1～60%RH (fixed point adjustable)

2.4 Humidity display accuracy

 ±3.0%RH

2.5 Temperature display range

 -9℃～99.9℃

2.6 Temperature display accuracy

 ±1.0℃

2.7 Humidity display range

 1～99.9%RH

2.8 Humidity sensitivity

 0.1%RH

2.9 Temperature sensitivity

 0.1℃

2.10 Average Power

 About 80W

2.11 Power Supply

 220V±10%V；50Hz；

2.12 Power Cord

 1.8 m

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3.1 Structural method

The box is made of anti-static painted steel plate or stainless steel, with partitions inside. The front of the door is a tempered glass window, with a pressurized flat lock installed on the door. There are movable storage partitions inside, and an integrated universal mobile static caster at the bottom. The top is a temperature and humidity display control device, and the back is a dehumidification module system.

3.2 Material composition

The cabinet is made of Baosteel steel plate with anti-rust treatment and anti-static double-sided paint, high-strength cabinet body, overlapping structure design, and good sealing performance. The static resistance value is 106~109 ohms, with strong corrosion resistance, avoiding static electricity generated by low humidity to better protect the product.

3.3 Structural strength

The overall load-bearing capacity of the equipment is ≥600Kg (uniform load).

3.4 Gate

1) The main door of the studio is a suction door that opens to the left at the front.

2) The door frame is surrounded by magnetic sealing strips to ensure the box is sealed.

3.5 layer board

The movable shelves can adjust the height between each shelf at will.

3.6 Bottom structure

Install 360° swivel universal electrostatic casters, and the two sets of casters on the front have brake function.

3.7 Lighting

The box is equipped with LED energy-saving lighting, which is controlled by the upper central control switch, making it convenient to take and put items at night or in dark places (optional).

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4.1 Automatic nitrogen filling

Automatic program-controlled sensing system, real-time data in the cabinet is transmitted to the screen. When the value in the nitrogen cabinet reaches the set value, the system automatically cuts off the nitrogen supply. When it exceeds the upper limit of the set value, the system automatically opens the nitrogen supply. Balanced point-type gas supply is evenly distributed to improve protection.

4.2 Pressure Control

Equipped with a pressure reducing device, with pressure display and pressure control, real-time data presentation. Adjust the gas pressure and flow entering the N2 cabinet, balance the slight pressure difference inside and outside the cabinet to maintain the positive pressure state inside the cabinet, and improve the product's anti-oxidation performance.

4.3 Electromagnetic switch

The solenoid valve adopts the Japanese imported brand SMC, 24V safe low voltage design, precise control without heating, ultra-long life and stable operation.

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5.1 Temperature and humidity sensor

Honeywell, an original American brand

5.2 Intelligent Controller

1. Touch panel control, light-sensing signal transmission mode

2. One-button start-up, automatic program operation, no human intervention required

3. Multifunctional integrated screen: power switch indication, function parameter modification, up and down key adjustment, temperature and humidity display, dual sensor control, host working status prompts (valve switch indication/humidification display/dehumidification display/humidification display), data storage, abnormal display of exceeding the standard, alarm prompt, display value calibration, annual calibration reminder, etc. are all displayed on the screen. The humanized design truly achieves fully automatic operation and various function displays.

6.1 Principles of Homemade Nitrogen

No external nitrogen is required, achieving 100% nitrogen saving. Nitrogen purity: 95%-99.9%, outlet pressure: 0.01-0.3Mpa, nitrogen flow rate 5L~15L/Min, nitrogen outlet dew point ≤ (-60℃), compact design, high safety performance. No phthalates, no organic steam nitrogen generator. Pressure swing adsorption nitrogen production (PSA nitrogen production for short) is an advanced gas separation technology. It uses high-quality carbon molecular sieve (CMS) as adsorbent and uses the pressure swing adsorption principle (PSA) at room temperature to separate air and produce high-purity nitrogen. The diffusion rates of oxygen and nitrogen gases on the surface of molecular sieves are different. Gas molecules with smaller diameters (O2) diffuse faster and enter more of the carbon molecular sieve micropores. Molecules with larger diameters, N2, diffuse slower and enter less of the carbon molecular sieve micropores. By utilizing the difference in the selective adsorption of nitrogen and oxygen by carbon molecular sieves, when compressed air passes through the carbon molecular sieve adsorption tower, oxygen is enriched in the adsorption phase and nitrogen is enriched in the gas phase, which can separate oxygen and nitrogen and continuously produce nitrogen under PSA conditions. The homemade nitrogen device has the characteristics of no phase change during the separation process, small nitrogen pressure loss, low energy consumption, simple operation, and no moving parts. It can work continuously and stably, and the nitrogen flow rate can be adjusted as needed. The temperature and humidity display controller has an operation interface, and an optional software recording port can be used to process and store data. The equipment has stable performance and a long service life.

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7.1 Controller

1) 5V safety voltage

2) Overpressure protection of electric control board

3) Timeout calibration reminder

7.2 Humidity Control System

1) Alarm when exceeding the standard, automatically release when reaching the standard

2) Electrical thermal overcurrent protection

7.3 Power System

1) Power supply fuse protection

2) Electrical thermal overcurrent protection

7.4 Others

1) Shell grounding protection