Method for controlling air speed in sterilizing tunnel during heating phase
A technology of heating stage and air flow control, applied in the field of air velocity control in the heating stage in the disinfection channel, which can solve the problems of large load of filter elements and high technical cost, etc.
Inactive Publication Date: 2004-08-25
ROBERT BOSCH GMBH
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Problems solved by technology
However, at the beginning of the heating phase, the filter elements arranged in the suction or exhaust area of the exhaust fan are subjected to a high load due to the high air velocity and the resulting atmospheric flow
In addition, the exhaust fan must be appropriately reinforced for the large air flow
This method therefore requires a relatively high technical outlay for the installation
Method used
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Embodiment Construction
[0012] figure 1 The sterilization tunnel 10 shown in is used to process pharmaceutical containers 11 such as ampoules, vials or the like before they are filled. Sterilization of the provided sterile container 11 is required for this purpose. In the disinfection tunnel 10 it is carried out like this, the container 11 that wets and cleans before is sent in the disinfection tunnel 10, and in the tunnel, they are at first by means of a conveyor belt 12 of a horizontal circulation, continuously moving in a not shown The inlet zone is preheated to a temperature of approximately 40 °C. Immediately after container 11 arrives figure 1 The region of the heating section 13 shown in , where the container 11 is further heated to about 350° C., wherein bacteria or the like are killed by heating and hot air flow. Finally, the containers 11 are cooled back to room temperature in a cooling zone, also not shown, from which they are conveyed on to a filling plant.
[0013] The sterilization ...
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In a tunnel-shaped area (14) of a sterilizing tunnel (10) containers (11) are transported by means of a conveyor device (12). Sterilization is accomplished by a vertical, heated air stream generated by means of a ventilator (21) and a heating device (20) in the area of the containers (11). To prevent particles from being torn from a sterile filter (23) during the heating phase, the invention provides for the number of revolutions per minute of the ventilator (21) to be adjusted during said heating phase. According to the invention, the rpm adjustment is carried out by predetermining the ventilator (21) rpm required at room temperature and at sterilization temperature. The control unit for the sterilizing tunnel (10) then increases the ventilator (21) rpm in accordance with a preset functional relationship as the temperature rises.
Description
technical field [0001] The invention relates to a method for controlling the velocity of the air flow during the heating phase in a disinfection channel. Background technique [0002] This type of sterilization tunnel is especially used for the sterilization of ampoules, vials or similar in the pharmaceutical packaging industry. A filter element is arranged in the disinfection channel to purify the air circulated in the disinfection channel. In order for these filter elements not to be damaged on the one hand and on the other hand to have an optimum cleaning effect without particles being torn off from the filter elements, a constant air velocity is required to flow through the filter elements. [0003] In such a known method, in order to achieve an almost constant air velocity at different temperatures during the heating phase in the disinfection channel, a speed measuring device is provided, which are connected to an exhaust fan through a controller, and the number of rev...
Claims
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IPC IPC(8): B65B55/06B65B55/02B65B55/10
CPCB65B55/10B65B55/025
Inventor 英格波特·彭尼坎普克劳斯·希勒布兰德
Owner ROBERT BOSCH GMBH