Oven, Dryer, Vacuum Dryer, 500°C High-Temperature Oxygen-Free Oven

Oxygen-Free Oven

Application Scope:

Primarily used for non-oxidative drying, baking, and heat treatment requirements in scientific research departments of aviation, aerospace, petroleum, chemical industry, electronics, telecommunications, and shipping. The non-oxidative oven, during operation, fills the working chamber with inert gases CO2 and N2 to prevent oxidation of materials during baking. Applications of the non-oxidative oven in industry: IC packaging, LCDs, transistors, sensors, diodes, quartz crystal oscillators, hybrid integrated circuit boards, etc.

I. Container Structure Features

The test chamber consists of five major parts: a pressure-insulated body, a vacuum system, a nitrogen filling system, a control system, and a safety protection system. It features an easy-to-move, integrated design, ready for use once installed and powered on.

2. Exterior Material: Cold-rolled steel plate with baked paint finish.

3. The inner wall of the box is made of stainless steel plate, all seams are continuously welded to ensure no leakage after long-term testing. The outer wall is reinforced with a cruciform steel frame, and an internal sample holder is included.

4. Insulation Material: Insulation medium is ceramic fiber cotton.

5. Cavity Door Sealing: Utilizes high-temperature-resistant silicone rubber sealing rings, which are made with a seamless, one-piece molding process to ensure high vacuum inside the box. The outer circumference of the sealing ring is equipped with a water-cooling pipeline system for door sealing temperature reduction. Optional Fluorine rubber sealing rings are available.

6. The test and control boxes are an integrated, top-to-bottom structure, with the power distribution control cabinet on the right side.

7. The bottom of the cabinet is equipped with mobile casters and positioning cups for easy movement and positioning of the machine.

8. Laboratory with built-in air conditioning room, heating section, and recirculating air ducts, horizontal air supply method (left and right air return method).

9. The box door features a single-hinged collision-proof design with a reinforced floating chain, ensuring smooth opening and closing. It's equipped with an eccentric locking mechanism for quick and easy operation.

10. Nitrogen Filling System: Equipped with a quick vacuum breakdown nitrogen filling system, which rapidly fills nitrogen through a controller set value. Nitrogen filling is controlled by pressure difference (always maintaining a slight positive pressure inside the box to ensure the oxygen content in the box is ≤50PPM).

11. Vacuum System: Optional: Scroll dry vacuum pump, featuring seamless stainless steel bellows connection, used for vacuum extraction.

Control System

1. Heating System:

This system employs distributed heating tubes outside the cavity for heating, utilizes an artificial intelligence PID controller for closed-loop control, and the controller regulates solid-state relays for precise temperature control. High-precision thermistor pt100 is used for temperature measurement.

2. Vacuum System:

Comprised of vacuum pumps, connecting bellows, quick-disconnect clamps, and vacuum gauges, the vacuum controller displays pressure and can adjust pressure values according to process requirements.

3. Nitrogen Filling System

Primarily composed of a nitrogen source, control valve, and nozzle. It acts during the displacement process, gradually diluting air with nitrogen to replace it with oxygen-free space, and can also assist in cooling.

4. Control System:

The control module is the core of this system, responsible for coordinating the actions of various modules to complete the entire process; it consists mainly of a human-machine interface, CPU control center, control interface, output components, and alarms.

The human-machine interface is implemented using Weidmüller touchscreens for displaying parameters and status interfaces, parameter input, and control functions, with a Mitsubishi PLC touchscreen used as well.

The control system can detect the operational status of related components and features self-diagnostic capabilities: standard software is upgradeable, backup software is available, and it offers parameter setting, process program writing functions (5 processes, each with programmable 18 stages), process output, and an alert sound upon process completion.

Note: Optional network port connections require selection (PLC brand varies with different network port connection types)

5. Cooling System

Composed of fan cooling and water cooling circulation systems, the fans employ strong exhaust ventilation to dissipate the heat inside the chamber.

Note: Door seal cooling and interior water cooling circulation require an external industrial chilled water unit.

Oxygen Content Analyzer

High-precision oxygen analyzer from a domestic brand, warm-up period, recorder output range is linear to oxygen concentration.

7. Nitrogen flow tube

The interior bottom is equipped with a nitrogen conduit pipeline.

III. Safety Protection

1. Heating System Protection: Heating tube short-circuit protection, heating tube overload protection, and heating tube and fan interlock protection (no heating if the fan does not operate).

2. Circulating Fan: Overload Protection, Short Circuit Protection.

3. Power Control System: Power Short Circuit Protection, Overload Protection, Reverse Phase Protection for Power Supply, Overload Protection for Control Lines.

4. System Safety Protection: Secure grounding protection device, over-temperature protection and alarm, oxygen content exceeding alarm, low-pressure pressure alarm, leakage protection alarm.

Specification Model (Dimensions are for reference only)