Convection type clean oven

Abstract

The invention relates to the technical field of drying medicines, chemicals, foods and pharmaceutical raw materials, and in particular to a convection type clean oven comprising an oven main unit (1) and an oven auxiliary unit (2). The left and right sides of the oven main unit (1) are respectively provided with a main unit air inlet (2-1) and a main unit air returning port (12-1). The interior of the oven auxiliary unit (2) is divided into three independent spaces through partitions, a first space is provided with a high-efficient filter (20) on the perpendicular direction, two sides of the high-efficient filter (20) are respectively provided with na oven auxiliary unit air outlet (2-2) and a circulating fan air outlet, a second space is provided with a medium-efficient filter (18) on the horizontal direction, the lower end of the medium-efficient filter (18) on the side wall of the oven auxiliary unit is provided with an oven auxiliary unit air returning port (12-2), the lower horizontal plane of a third space is provided with a heat exchanger (19), and the side wall of the oven auxiliary unit in the third space is provided with a circulating fan air inlet; the outer walls of the oven auxiliary unit (2) are provided with a wet exhaust fan (5), a circulating fan (6) and a fresh air inlet (8).

Description

technical field [0001] The invention relates to the drying technical field of medicine, chemical industry, food and raw materials, in particular to a convection type clean oven. Background technique [0002] Ovens can be divided into programmable ovens, precision ovens, nitrogen-filled ovens, vacuum ovens, explosion-proof ovens, electric blast ovens, hot air circulation ovens, etc. according to their performance. Fangpan is suitable for components in all walks of life that need to be dried and heated. At present, the forms of hot air circulation ovens of similar products on the market are: 1. Oven finned heat exchangers (heat exchangers for steam, hot water, heat transfer oil, electric heating, etc.) are generally designed and installed on both sides or top of the box. 2. The circulation fan is installed inside the oven body; 3. The air filter is installed in the air duct inside the box. [0003] At present, the defects of hot air circulation ovens of similar products on t...

AI Technical Summary

Problems solved by technology

[0003] At present, the defects of hot air circulation ovens of similar products on the market are 1. The hot air in the oven circulates repeatedly in the left, right and top air ducts. When passing through the surface of the finned heat exchanger, the fine powder is easily adsorbed on the surface of the heat exchanger. After being heated for a long time, this part of the fine powder will be carbonized or coked to form a dark brown fine powder. Once it falls off, it will pass through the material in the baking tray with the circulating air. 2. The finned heat exchanger is located on the side of the box and it is difficult to clean. If the cleaning is not complete, residual impurities will form a pollution source; 3. The top air duct is due to the design structure The reason is that it is impossible to clean here. The fine powder carried away by the circulating air passes through here, and the materials adsorbed or left in this air duct will also be carbonized or coked to form dark brown fine powder after being heated for a long time. When the circulating air passes through the material in the drying tray, it will pollute the material (raw material or finished drug); 4. The built-in radiator, filter and fan of this type of oven are easy to cause secondary pollution

The above four defects all have great pollution risks, and cannot fully meet the requirements of the current GMP and CGMP standards for drug production management

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