Precision Forced Convection Drying Oven DHG9140HA

The DHG9000HA series precision forced convection drying oven is the result of years of research by our factory's technical team, incorporating the advantages of German drying ovens, and currently offers the highest uniformity. The cabinet features a modern and aesthetically pleasing design with a spray-painted exterior, and the control system is located at the bottom of the unit.

The control instrument utilizes a fully programmable automatic meter capable of regulating heating speed, temperature rise, constant temperature, and multi-segment curve settings. The PID+SSR system ensures synchronous and coordinated control, enabling consistency and reproducibility for any test or experiment. The instrument is equipped with a secondary over-temperature automatic protection function, ensuring reliable control and safe operation. The stainless steel electric heater, located at the bottom of the chamber, emits heat upward through a three-sided air duct. After passing over the drying material, the air is drawn in by the centrifugal fan at the bottom, forming a rational airflow path that facilitates full convection of hot air, maximizing temperature uniformity within the chamber. Under these conditions, the uniformity at various points in the effective space inside the chamber reaches up to ±1°C, comparable to drying ovens from Japan and Germany. It is particularly suitable for industries such as electronic components, rubber, plastics, and decorative materials that require strict temperature uniformity in testing.

Product Technical Parameters:

1.1 Temperature Range: RT+10°C to 300°C

1.2 Fluctuation: ±1°C;

1.3 Display Accuracy: 1°C;

1.4 Uniformity: ±1%

1.5 Working Chamber Dimensions: 450*550*550 MM

1.6 Approximate External Dimensions: 600*790*990 MM

1.7 Heating Rate: ≤8°C/min (adjustable to any speed below 8°C/min)

1.8 Heating Power: 1500W;

1.9 Power Supply: 220V, 50Hz;

1.10 Shelf Configuration: 2 pieces

1.11 Net Weight: Approx. 116 KG

1.12 Gross Weight with Wooden Case: Approx. 140 KG

1.13 Packaging Dimensions: Approx. 750*880*1180 (Depth*Width*Height mm)

Temperature Control System and Features

2.1 Temperature Measurement: PT100 high-precision sensor

2.2 Control System: LTDE fully automatic programmable instrument, PID adjustment, display accuracy 1°C

2.3 Complete Electrical Components: Utilizes branded contactors, cooling fans, and solid-state relays

2.4 Time Control: Can set heating time, constant temperature time control; automatic shutdown when constant temperature time is reached

2.5 Over-Temperature Protection: Built-in secondary over-temperature protection device for dual safety

2.6 Operation Mode: Full range adjustable constant temperature, constant operation program operation

Cabinet Structure and Materials

3.1 Outer Cabinet Material: High-quality cold-rolled steel plate treated with phosphating film and high-temperature spray painting, color: computer gray

3.2 Working Chamber Material: Stainless steel inner liner, removable stainless steel electropolished shelves, tempered glass viewing window

3.3 Internal Structure: Specially designed heating chamber at the bottom of the cabinet, rational air duct structure, airflow circulation design, fan-forced circulation. The air inside the chamber is drawn into the heating chamber by the fan motor and circulated back into the working chamber through air ducts from the sides and rear via distributed heat dissipation vents, then back into the heating chamber, repeating the cycle to achieve comprehensive three-dimensional heating effect, ensuring maximum air uniformity inside the chamber. Unique geometric cavity clean design; two shelves can be adjusted to any height as per user requirements

3.4 Insulation Material: High-density glass fiber wool filled in the front, rear, left, right, top, and bottom layers for insulation

3.5 Sealing Material: High-temperature resistant expansive silicone rubber sealing strip between the door and the working chamber to ensure sealing; the inner door panel is made of stainless steel. A double-layer tempered glass observation window is located on the door for transparent heat insulation to observe changes in samples inside the chamber. A safety ventilation hole is located at the rear of the cabinet.

3.6 Temperature Measurement Port: PT100 sensor enters from the upper rear of the cabinet;

3.7 Terminal Blocks: Heating element terminal blocks located at the lower rear of the cabinet;

3.8 Controller: Located below the cabinet, built-in control system, compensation wires connected to PT100 sensor

3.9 Heating Element: Stainless steel electric heater

3.10 Total Weight: Approx. 116 KG

3.11 Standard Packaging: Wooden case

Heating System

4.1 Stainless steel heater located in the heating chamber inside the cabinet, controlled by the PT100 sensor responsive control system

4.2 Heating output of the stainless steel heater is controlled by the microcomputer in the LTDE fully automatic instrument

Air Circulation System

5.1 Circulation fan located in the center of the annular stainless steel heater in the heating chamber

5.2 Utilizes a long-shaft fan motor and multi-wing aluminum alloy fan blades to forcibly draw air from the working chamber into the heating chamber, then automatically circulate it back into the working chamber through air ducts on the left, right, and rear sides, continuously repeating the cycle to achieve uniform and stable hot air temperature inside the chamber

Safety Protection System

6.1 Non-fuse protector

6.2 Working chamber over-temperature protector, upper limit over-temperature alarm and heating stop

6.3 Leakage protection, electric shock protection to ensure safety

6.4 Fan over-current protection

Included Technical Documentation and Accessories

7.1 Operation Manual

7.2 Product Warranty Card

7.3 Certificate of Conformity

After-Sales Service

8.1 Provide remote technical guidance to users

8.2 Timely supply of equipment spare parts and accessories

8.3 Provide technical consultation and support during equipment use

8.4 Respond within 8 working hours upon receiving customer fault notification