Vacuum cavity temperature regulation method

The cavity heating method of the vacuum pretreatment equipment is divided into two types: internal heating and external heating. The external heating is heating outside the cavity, and then the heat is transmitted through the cavity wall. Finally, heat is transferred through heat radiation. The internal heating is performed directly inside the chamber. Compared with the internal heating method, the external heating method has hysteresis, and the internal heating method is more accurate in controlling the temperature than the external heating, so the internal heating method is selected.

The selection of the heater is also very important. The plate-type heating plate that is easy to install is used for internal heating. The surface of the heating plate is a mirror-finished stainless steel, which is more advantageous in terms of flatness than polishing directly by the wall of the cavity, which is more conducive to the conduction of heat by heat radiation.

Because the interior of the equipment cavity is a regular rectangular solid body, the use of one side of the heat radiation method is not ideal, and heat conduction can not reasonably cover the internal space of the entire cavity. After trial and error, a heating plate is installed directly above, directly below, on the left side, and on the right side of the equipment cavity to heat the inside of the cavity by means of surface heat radiation.

Because the equipment adopts the four-way heating method of upper, lower, left, and right sides in a vacuum state, it is much more complicated than simply heating all the way. This is a difficulty in temperature control. Therefore, PID is used for temperature control adjustment, and the temperature control thermocouple is set inside the cavity so that the temperature in the cavity can be better controlled.

High Speed Roll Up Door

Material Selection:

1. Frame: 2MM thicknesses cold-roll Stainless steel.

2. Motor: Germany SEW brake motor (outer), power 0.75KW, power supply 220V.

3. Control system: Imported Japan Mitsubishi converter and PLC to control of electric box (150%1HZ)

4. Opening & closing speed: 0.6-1.5m/s (adjustable).

5. Safety Device: Korea Photocell Sensor, emergency stopping reaction when sensing obstacles.

6. Curtain: France high-density polyester fiber and the surface coating processing, thickness 0.8MM, variety colors can be chose: Red, yellow, blue, green, orange, gray, white, transparent, etc. Tensile strength: 4000/3500N/5cm, tear strength 600/600N. Fire-proofing level: German standard DIN75200 Usage temperature: -30 ° C +70 ° C.

7. Wind resistant: The Aluminium alloy Reinforce Girder to increase wind resistant effect.

8. Curtain replacement function: Aluminium alloy Reinforce Girder is loaded between 2 pieces Curtain, can be replaced easily if any curtain broken, save your cost.

9. Transparent window: 1.2MM thickness transparent PVC window, size and location is up to your request, more safer.

10. Seal: Seal brush are Installed inside the guides, and the special bottom design, to fit any uneven ground.

11. Cotrolling way: Push button + radar sensor, very convenient.

12. Limiting Switch: Mechanical limiting switch, easily and exactly.

13. Emergency STOP: With emergency stop button on control panel, can stop easily by

Hand once disconnect or accident

14 Fault recovery function: All Hongfa's production is with fault recovery function, system will self-recovery after power cut off.

15. Delivery time: About 7 business days with contract and deposit confirmed.

16. Pyament item: 50% before production, and the other 50% before shipment.

17. Warranty Details: We provide 12 months warranty for all doors and accessories (except man-made disasters, Irresistible natural disasters, ect^).

We have many professional engineers with rich experience, qualified products, perfect service system, and good cooperation relationship with many famous companies.

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SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , http://www.hongfarrs.com