DE1501383A1 - Device for cooling objects - Google Patents

Description

HAMAG-HANSEILA GMBH, Viersen.

Device for cooling objects

The invention relates to a device for cooling sugar confectionery, with a housing that is divided into a first cooling zone, into which the items arrive first, and a second cooling zone is divided, and with conveyors that carry the items contrary to air currents with each cooling zone different Temperature lead.

When sugar products, such as sweets, come from the embossing machine, they have a temperature of around 80 to 90 ^° C. Until now, it has been customary to bring the v / are in this state onto open cooling tracks, which consist of a slowly running conveyor belt, on which the goods are distributed. Room air or outside air is blown onto this cooling path through air nozzles. This air cools the goods and absorbs the heat contained in the goods. The heated air flows into the room in which the cooling tracks are arranged.

Devices for drying agricultural products, for example green fodder, have become known (German patents 971 317 and 970 862), in which a housing is divided into an initial, a pre-drying and a finished drying zone. By

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J Documents (Art. 7, Paragraph 1, Paragraph 2, No. 1, Sau 3 des Ämierungee ··· v. 4, λ 19671

the single, differently tempered zones lead elevators and belt conveyors the material to be dried.

The object of the invention is to provide a device for cooling sugar confectionery, which can be used with relatively little production and Operating costs a flawless and for the V / are compatible cooling. At the same time it should be possible to use the The space in which the device is located, either completely free of the air heated in the cooling device, or this To heat the room more or less with this air. Another aim of the invention is to ensure that the temperature difference between the goods to be cooled and the cooling air above it is kept almost constant.

This object is achieved according to the invention in that the air flow running in the first cooling zone from room or Outside air and the air flow running in the second cooling zone is formed from cooled air.

The cooling device according to the invention, which is divided into two zones is, works extremely economically. The temperature gradient between the sugar confectionery to be cooled and the ambient air brought in is so high in the area of the first cooling zone that that an effective pre-cooling of the goods by untreated, the device or the room in which the device is installed, surrounding air is reached without any energy other than that required for blowing through. In the second zone, the goods are then supplied with energy cooled down to the set temperature for heat exchange.

Another advantage is that due to the moderate heat gradient between the hot treated sugar confectionery and the supplied air is avoided that the goods through only accordingly moderate temperature stresses do not receive any cracks.

If the exhaust air duct of the first cooling zone has a branch pipe leading into the work room, the work can be done during the cold season.

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workroom can be heated by diverting the heated exhaust air.

An embodiment of the invention is shown in the drawing Longitudinal section is shown in simplified form and is described in more detail below.

In the cooling device shown, the temperatures of the cooling air are in circles and those of the goods to be cooled are in rectangles indicated at the respective points, namely as they occur, for example, when cooling sweets made by an embossing machine be fed via a distribution conveyor belt 1 and a chute of the device.

In a housing 3 which is closed on all sides, three conveyor belts 6, 9 and 12 run one above the other. The conveyor belts] around deflection rollers A ₁ 5; 7, 8 or 10, 11, of which at least one of each pair, preferably the pulleys 5, 7 and 11 are driven. The direction of movement of the conveyor belts 6, 9 and 12, which rise from left to right in the drawing, is indicated in the drawing by arrows above the upper run of the belts. The pulleys 4, 5; 7, 8 and 10, 11 of the 'conveyor belts 6, 9 ^s i ^{n <} * 12 are arranged outside the housing 3. Of course, these pulleys could also be arranged inside the housing. It is advantageous in the illustrated arrangement of the deflection wheels that their bearing mechanism is freely accessible outside the housing, and that the passage of the goods from belt to belt outside of the housing 3 can be observed.

From the conveyor belt 6, the goods pass through a slide 13 to the conveyor belt 9 and from there through a second slide 14 to the conveyor belt Conveyor belt 12. At the end of the conveyor belt 12, another rod is arranged before 15, over which the finished cooled goods leaves the device.

The upper two conveyor belts 6 and 9 lead through a

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first cooling zone. This cooling zone is in the area of the outlet of the conveyor belt 9 through an inlet opening 16 on the housing 3 at normal temperature air from the room or via a not shown line supplied from outside. This air passes through the first cooling zone in the direction of the arrows A against the conveying direction of conveyor belts 6 and 9. In the area of the inlet The goods are followed by an exhaust air duct 17 on the housing 3 above the conveyor belt 6, in which a fan 20 is seated. The exhaust duct 17 branches off at its end into a branch channel 18 opening into the open air and one into the space in which the cooling device is located According to the invention, the leading branch channel 19 · With a control flap 21 in the branch, the channel 18 or the channel 19 can be completely or partially closed, so that the air flow A to selectable large parts into the open air and in the room is guided. Instead of the adjustable flap 21 which can be operated from the outside, a valve can also be provided.

Between the conveyor belts 6 and 9 is one of several parts existing partition in the housing 3, which has a passage for the air flow A only at the end of the conveyor belt 6.

Another partition between the conveyor belts 9 and 12 separates the upper, first cooling zone from a second, below located. Beginning and end of the second cooling zone, in which the upper run of the conveyor belt 12 runs, are connected via a circulation channel 22 in which a Fan 25 is arranged. In the circulation channel, a second air flow is generated by the fan 25, which the arrows B indicate. Further A cooling unit (evaporator) 24, with which the air flow B is cooled, and an air filter 23 are used in the circulation channel 22.

The device according to the invention works as follows; Coming from the embossing machine sweets, including a temperature, have between 80 and 9O ⁰ C are fed via the conveyor belt 1 and pass via the slide 2 to the beginning of

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Conveyor belt 6. The conveyor belt 6 conveys the sweets against the air flow A through the housing 3 and releases it onto the slide 13. From there the candies go to the Conveyor belt 9 »which in turn guides the sweets against the air flow A through the housing 3 and transfers them to the end of the chute 14.

In this first cooling zone that air enters through the opening 16 at normal temperature air, with a temperature of about 2O ⁰ C. The air is sucked in by the fan 20 in the exhaust air duct 17 and sweeps over the sweets against the conveying direction. At the beginning of the conveyor belt 6, the air has already been heated to about 45 ^° C. by the sweets. Since the candies have a temperature of about 85 ⁰ C here, the temperature difference 40 °, which can bear to take the candy without damage. ^{The air flow A has a temperature of about 35 °} C. at the transition from the conveyor belt 6 to the conveyor belt 9. Here the sweets have a temperature of 65 ^° C. The temperature difference here is about 30 ^° C. At the end of the conveyor belt 9 and in front of the chute 14 the sweets still have a temperature of 50 ⁰ C, while the air stream A has its initial temperature of 20 ⁰ O here. Here, too, the temperature difference is only about 30 ^° C.

Note that this first cooling the candy is achieved of about 85 ⁰ C to about 50 ⁰ C, to be spent without special energy for a cooling unit must · The only energy required is the expenditure for the fan 20th

In the warm season of the year , the air flow A discharged via the exhaust air duct 17 will be conducted directly into the open via the branch line 18. On the other hand, in the cold season, a more or less large part of this air flow A can be guided via the branch line 19 into the room in which the cooling device is located, and this room can thereby be heated.

For the first cooling zone , the air for the air flow A can either be taken from the room in which the device is set up, or a line to the outside of this room can be

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mes be provided to provide fresh air for the first cooling zone of outside. Of course, a branch can also be provided at the opening 16, as is the case at the end of the exhaust air duct 17 is arranged, and also arrange an actuator in this branch in order to be introduced into the first cooling zone To take airflow either from outside or from the room, or from outside as well as from the room.

The cooling air flow B in the second cooling zone is through the fan 25 kept in circulation. Here, energy is expended in the cooling unit 24 in order to continuously cool this cooling air flow B.

The candies have at the input of the second cooling zone has a temperature of about 5O ⁰ C. The flowing past the candies in countercurrent to the direction of movement of the conveyor belt 12 air flow B here has a temperature of at most 30 ⁰ C. In contrast, the sweets just before leaving the cooling device brushed by the freshly supercooled air stream of about 10 ^° C. in the evaporator 24. The candies experience a final cooling here, so that they leave the cooling device at a temperature of about 30 ^° C.

Of course, the temperature information given here is only meant as an example.

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Claims (5)

HAMAC-HANSELLA GMBH, Viersen patent claims 1. Device for cooling sugar confectionery with a housing, that is divided into a first cooling zone, into which the items arrive first, and a second cooling zone, and with conveying devices that guide the objects against air currents with different temperatures in each cooling zone, characterized in that the one running in the first cooling zone Air flow (A) from room or outside air and the air flow (B) running in the second cooling zone from cooled air Air is formed. 2. Device according to claim 1, characterized in that the first cooling zone above the second cooling zone in the housing (3) is arranged. 3. Device according to one of claims 1 and 2, characterized by an air inlet opening (16) in the housing (3) for Room or outside air at the end of the first cooling zone, through an exhaust air duct (17) with a fan (20) at the beginning of the first cooling zone and through a circulation channel (Ä2) connecting the beginning and end of the second cooling zone, into which a cooling 9098A9 / 0211 " ² ~ Documents ' / ■ '■■ ^: .-.' ■■ '' ^ - · SaU: -> dea Änueruuyiyeü. ν. Ή. unit (24) and a fan (25) are switched on. 4. Apparatus according to claim 3, characterized in that the exhaust duct (17) of the first cooling zone at his The end branches into a branch line (19) leading into the working space and a branch line (18) leading into the open, and that at the branching point a control flap (21) is arranged with which the to the branch lines (18, 19) guided airflow can be controlled. 5. Apparatus according to claim 3, characterized in that the air inlet point (16) to the first cooling zone both is provided with a connection line for outside air as well as with a connection line for room air and that on this Point (16) a control member is provided with which the introduced into the first cooling zone portion of the outside air and the room air can be regulated.