FR2581169A1 - Dehumidification system for chamber for storing and fermenting bread doughs - Google Patents

Abstract

This system comprises at least one turbine 13 capable of blowing outside air into the chamber 2 for storing and fermenting during the fermentation phase. Application to the production of bakery equipment.

Description

SYM; rEIF TsM1E DEHUMIDIFICATION
FOR STORAGE AND FERMENTATION CHAMBER
BREAD PASTA.

 The present invention relates to a dehumidification system for a preservation and fermentation chamber for bread doughs.

In such chambers, the temperature is first maintained between 3 and 50C to prevent fermentation of the dough and is then increased to 20 to 250C to allow fermentation.

 In order to avoid the formation of a dry crust on the dough pieces during fermentation, a minimum humidity is maintained in the room, especially during storage, and adequate ventilation is ensured in all parts of the enclosure.

 To this end, a chamber of this type, moreover already described in patent No. 7341347 in the name of the applicant and in its addition No. 7832859, comprises a circuit for cooling the chamber consisting of a refrigeration unit whose evaporator is located in the room itself, at least one fan and ducts to ensure the ventilation of the air, heating means, a water spray bar to maintain the minimum humidity and automatic means for regulating the temperature and hygrometry.

 However, when the chamber passes from the blocking phase to the fermentation phase, that is to say from a temperature of the order of + 40C to a temperature of the order of + 200C, it occurs on the walls a significant condensation which can cause at the end of fermentation a real runoff of water, which, mixed with the flour dust, forms a kind of molasses.

 The present invention aims to remedy these drawbacks by providing a dehumidification system for the storage and fermentation chamber for bread doughs, with or without air ventilation ducts.

 To this end, the system it relates to comprises at least one turbine capable of blowing the outside air into the chamber during the fermentation phase. In this way, the outside air taken from the bakehouse, generally hot (about 25 "C) and dry (about 50% humidity), is recycled inside the chamber and dries the atmosphere of it. This system also makes it possible to achieve heating savings since the outside air taken up is at substantially the same temperature as that desired inside the chamber at the time of fermentation, which limits the consumption of electricity for supply of the room heating resistors.

 In the case of the application of this system to the equipment of a room of the aforementioned type comprising two ducts ensuring the ventilation of the air, each turbine is provided so as to breathe the air taken from inside. cladding in the upper part of the room.

 Each turbine in this dehumidification system can be mounted outside the fermentation chamber. This arrangement is advantageous when this system is added to an already existing chamber, since it then suffices to drill a hole for the passage of the end of the scroll of the turbine.

 According to another embodiment, each turbine is placed inside the fermentation chamber, directly in the cladding.

 Advantageously, decompression valves are provided on the top of the fermentation chamber, in order to eliminate the overpressure.

 In addition, provision may be made to incorporate a heating resistor directly at the outlet of each turbine, in order to heat the outside air taken up by this turbine and thus lower its humidity level, which further improves the efficiency of the system. . In this case, the traditional heating resistors can be omitted, which again constitutes a saving.

 In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended drawing representing, by way of nonlimiting examples, two embodiments of this dehumidification system - Figure 1 is a sectional view along a vertical plane of a bread dough preservation and fermentation chamber, equipped with a first dehumidification system; - Figure 2 is a horizontal sectional view along 2-2 of Figure 1; - Fig. 3 and 4 are two views corresponding respectively to those of FIGS. 1 and 2, in the case of a second dehumidification system.

 The controlled fermentation chamber (2) comprises an enclosure constituted by side walls (3), a ceiling (4), a bottom wall (5) and two doors (6). At the upper part of the enclosure is fixed a casing (7), in an opening (8) of which are housed two fans (9) ensuring the circulation of air in the chamber. The air, taken inside the chamber, is brought by the fans (9) in ventilation ducts (10,11), extending horizontally from the casing (7) towards the side walls, then along these, and comprising lateral openings (12) intended to ensure a regular distribution of the air flow throughout the chamber.

 In a first embodiment of the dehumidification system shown in Figures 1 and 2, two turbines (13) are mounted outside the chamber (2) on the ceiling (4). Each turbine is placed inside a cover (14) provided with a screened opening (15) for the air intake. Each turbine (13) communicates with the interior of the chamber (2) via a ventilation duct (16), of the same dimensions as the end of the volute, introduced into an opening (17) corresponding to the ceiling of the chamber and sinking enough into the duct (11) so that the air leaving the turbine is directed into this duct, so as to ensure adequate circulation of the air in the ducts (10,11) and inside the chamber (2), in order to reduce the humidity in the latter. Pressure relief valves (18) are placed in the ceiling (4) to eliminate the overpressure of the chamber.

 In a second embodiment of this system shown in Figures 3 and 4, in which the same references designate the same elements, two turbines (19) are mounted inside the chamber (2) against a wall (3) of this room. Each turbine (19) communicates with the outside by means of an opening (20) made in the ceiling (4) and protected by a cover (21) provided with a screened opening (22) for the entry of the air. A cover (23), fixed to the ceiling (4) beyond the opening (20) and to the side wall (3), surrounds each turbine (19), is provided at its lower part with an opening (24 ) whose dimensions correspond to those of the end of the scroll of the turbine and is provided so as to ensure a guiding of the air emitted by the turbine towards the vertical duct (11), in order to dry the walls of the bedroom.

 As in the first embodiment, pressure relief valves (18) are placed in the ceiling (4) to eliminate the overpressure.

 In both embodiments, heating resistors (25) can also be placed at the outlet of each turbine (13,19), in order to heat the outside air taken up by this turbine.

 As it goes without saying, the invention is not limited to the sole embodiments of this system described above by way of examples, on the contrary it embraces all of the variant embodiments thereof.

 Thus, this dehumidification system can just as easily be installed in a preservation and fermentation chamber for bread doughs which do not include sheaths, to ensure uniform ventilation of the air in the chamber, without the this goes beyond the scope of the invention.

Claims (6)

- CLAIMS  1. Dehumidification system for storage and fermentation chamber for bread doughs, characterized in that it comprises at least one turbine (13,19) capable of blowing the outside air into the chamber (2) during the phase of fermentation.  2. Dehumidification system according to claim I for the storage and fermentation chamber of bread doughs, of the type comprising two ducts for ensuring the ventilation of the air in the chamber, characterized in that each turbine (13,19) is provided so as to breathe the air taken outside inside the cladding (10,11) in the upper part of the chamber (2).  3. Dehumidification system according to one of claims 1 or 2, characterized in that each turbine (13,19) is mounted outside the fermentation chamber (2).  4. Dehumidification system according to one of claims 1 or 2, characterized in that each turbine (13,19) is placed inside the fermentation chamber directly in the cladding (10,11).  5. Dehumidification system according to any one of claims 1 to 4, characterized in that pressure relief valves (18) are provided on the top of the fermentation chamber.  6. Dehumidification system according to any one of claims 1 to 5, characterized in that a heating resistor (25) is placed directly at the outlet of each turbine (13,19).