WO1999049725A1 - Refroidisseur de lait equipe d'un dispositif d'agitation - Google Patents
Refroidisseur de lait equipe d'un dispositif d'agitation Download PDFInfo
- Publication number
- WO1999049725A1 WO1999049725A1 PCT/FR1999/000734 FR9900734W WO9949725A1 WO 1999049725 A1 WO1999049725 A1 WO 1999049725A1 FR 9900734 W FR9900734 W FR 9900734W WO 9949725 A1 WO9949725 A1 WO 9949725A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tank
- blade
- zone
- milk
- milk cooler
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J9/00—Milk receptacles
- A01J9/04—Milk receptacles with cooling arrangements
Definitions
- the present invention relates to a milk cooler with cover and agitator, of the type known as "on the farm”.
- the milk is collected from the farms by tanker truck rounds, the frequency of which depends on the quantity of milk collected at each milking; meanwhile the milk should be cooled and kept under intermittent stirring.
- Milk coolers are used for this purpose, comprising a vertical cylindrical tank provided with a cover allowing access to the tank for cleaning or inspection, the bottom of the tank being inclined in order to facilitate the flow of milk by a drain port located at the bottom of the cooler.
- the articulation of the cover on the tank can either be placed above the drain or be diametrically opposite it. But, when this articulation is located above the emptying orifice, it is then necessary to free up space all around the tank in order to allow easy access, both for emptying the milk and for opening the lid. .
- the option consisting in placing the articulation of the cover in a position diametrically opposite to the drain orifice makes it possible to place the tank against a wall or in a corner, so that the drain orifice is accessible. It is therefore the most advantageous solution with regard to the space taken up on the ground and the ease of use of the milk coolers.
- the tanks are also provided, on the one hand, with a cooling system, and on the other hand, a stirring device whose main function is to ensure the homogeneous distribution of the various components of the milk (material fat, protein matter, etc.) and to guarantee the good performance of the cooling system.
- the stirring device, integrally connected to the cover is, in principle, made up of a shaft passing through said cover and ending in a blade.
- the stirring device can then be envisaged. It can be positioned in the center of the tank, it can also be positioned between the drain orifice and the axis of the tank, or even, it can be positioned between the axis of the tank and the articulation of the cover. .
- the first arrangement has major drawbacks. Indeed, it results in a limitation of the width of the stirrer blade which must not come up against the internal wall of the tank when the lid is opened. If it is nevertheless essential that the blade has a relatively large diameter, then a special mechanical device for hinging the cover must be provided, which clearly increases the cost and complexity of the cooler.
- the second arrangement has exactly the same drawbacks, with an additional cost and an even greater complexity.
- the third arrangement does not have any of the aforementioned drawbacks, but poses other problems in terms of the quality of agitation as a function of the level of filling of the tank. Indeed, if one opts for a blade of large dimension of the type of that present in the device of the prior art of FIGS. 1 and 2, the agitation is sufficient when the tank is filled, but it is too vigorous when 'it is only weakly. In addition, it is necessary to reach a filling level of the order of 25% of the tank capacity before the milk covers the paddle, which can cause churning and aeration of the milk.
- the blade is of small size, such as that present in the device of the prior art of FIGS. 3 and 4, it is covered at a relatively low filling level, but the agitation is too weak when the tank is filled to its nominal capacity, which in particular results in poor homogenization of the fat.
- the main object of the present invention is therefore to remedy the aforementioned drawbacks of milk coolers with a lid provided with a stirring device.
- the milk cooler according to the invention comprises a vertical cylindrical tank of internal diameter D with a bottom inclined towards a drainage orifice, provided with a cover connected to the body of the tank by an articulation situated on the shallowest side.
- a stirring device consisting, on the one hand, of a substantially vertical shaft located between said articulation and the vertical axis of the tank, at a distance e from said axis, and , on the other hand, of a blade of diameter d, and is characterized in that said blade has a central zone recessed on its upper part symmetrically on either side of the shaft, and two zones of end.
- This blade allows it to be covered by milk at a low filling level, thus avoiding churning and aeration of the milk. In addition, it provides increased agitation efficiency even when the cooler is filled to its maximum capacity.
- Figure 2 is a schematic top view of the device of Figure 1;
- FIG. 3 is an axial sectional view of a second milk cooler of the prior art
- Figure 4 is a schematic top view of the device of Figure 3;
- the cooler according to the invention comprises a cylindrical tank body 9 having vertical walls and a bottom plate 8.
- this tank body there is an inner cylindrical tank 1 with vertical walls having an inclined bottom 2, the deepest zone of the tank 1 being situated on the side of a drain pipe provided with an orifice 3, which opens out from the tank body 9.
- An integrated type evaporator is composed by the inclined bottom 2 and another sheet metal plate delimiting an enclosure in communication with a pipe 11 and in which a refrigerant circulates.
- a cover 4 closes the inner tank 1 and is connected to the tank body 9 by means of a hinge 5.
- a stirring device comprising a vertical shaft 6, integral with the cover 4, is positioned in the shallowest part of the tank.
- This shaft 6 ends with a blade 7 of new shape.
- the free end of the shaft 6 is coupled to a motor shaft belonging to the electric geared motor 10 which makes it possible to rotate the entire stirring device.
- the shaft 6 is perpendicular to the inclined bottom 2 of the inner tank 1.
- the blade 7 has a central zone (Y) hollowed out on its upper part symmetrically on either side of the shaft 6, as well as two end zones (X) and (Z).
- the two end zones (X) and (Z) are mutually parallel and inclined at an angle ⁇ relative to the hollow zone (Y), as can be seen in FIG. 6.
- the angle ⁇ here is approximately 14 °.
- the blade 7 of FIGS. 5 and 6 is characterized by a d / D ratio of the order of 0.6.
- the blade 7 has a ratio of the height h x of the area (X) , respectively of the height hz of the area (Z) , to the height h ⁇ of the area
- the agitator blades give the liquid to be agitated a rotational movement in the cylindrical tank and vertical movements allowing the liquid to be mixed between the upper part and the lower part of the content.
- the ratio of the height hx of the zone (X), respectively of the height hz of the zone (Z) , to the height h ⁇ of the zone (Y) is chosen between 2 and 50 in depending on the desired recess and the area for transmitting the desired energy.
- the ratio of the radius rx of the zone (X) , respectively of the radius r z of the zone (Z) , to the diameter of the blade d is preferably equal to 0 , 2 to 0.3, which allows the radius of the area (Y) to be determined by difference.
- the blade 7 as a whole is substantially wider than the blades of the prior art, which makes it possible to enlarge the areas (X) and (Z) by the same amount, in order to preserve a energy transmission surface which remains sufficient. This also makes it possible to cause shearing of the liquid, since the speed of these areas of the blade is greater than the speed of rotation of the liquid in the tank.
- a d / D ratio of between 0.4 and 0.7 is chosen for this.
- the identical inclination of the zones (X) and (Z) relative to the zone (Y) further increases, for its part, the efficiency of this new blade.
- the angle ⁇ formed respectively by the zones (X) and (Z) with respect to the zone (Y) is chosen between 5 ° and 30 °.
- the lower walls of the whole of the area (X) and of the part of the area (Y) between the area (X) and the shaft 6 are extended by a first strip of material making an angle of 90 to 140 ° with said walls, the strip being located in front of this first half of the blade 7 and having a narrow width.
- the lower walls of the whole of the zone (Z) and of the part of the zone (Y) comprised between the zone (Z) and the shaft 6 are also extended by a second strip of material making a angle of 90 to 140 ° with said walls, the strip being located in front of this second half of the blade 7 and having a small width.
- the first and second bands are symmetrical with respect to the plane passing through the zones (X) and (Z) of the blade 7.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU29408/99A AU2940899A (en) | 1998-03-30 | 1999-03-30 | Milk cooler equipped with stirring device |
PL99343168A PL343168A1 (en) | 1998-03-30 | 1999-03-30 | Milk cooler equipped with stirring device |
EP99910458A EP1065924A1 (fr) | 1998-03-30 | 1999-03-30 | Refroidisseur de lait equipe d'un dispositif d'agitation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR98/03893 | 1998-03-30 | ||
FR9803893A FR2776471B1 (fr) | 1998-03-30 | 1998-03-30 | Refroidisseur de lait equipe d'un dispositif d'agitation |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999049725A1 true WO1999049725A1 (fr) | 1999-10-07 |
Family
ID=9524634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/000734 WO1999049725A1 (fr) | 1998-03-30 | 1999-03-30 | Refroidisseur de lait equipe d'un dispositif d'agitation |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1065924A1 (fr) |
AU (1) | AU2940899A (fr) |
FR (1) | FR2776471B1 (fr) |
PL (1) | PL343168A1 (fr) |
WO (1) | WO1999049725A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014027335A2 (fr) * | 2012-08-17 | 2014-02-20 | Vaz Camara Eloy | Système électrique-mécanique de nixtamalisation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1456029A (fr) * | 1965-09-06 | 1966-05-20 | Westfalia Separator France | Cuve à lait réfrigérante |
DE2041811A1 (de) * | 1970-08-22 | 1972-02-24 | Gustav Kunz | Vorrichtung zum Kuehlen von Milch |
EP0755623A1 (fr) * | 1995-07-25 | 1997-01-29 | Prominox S.A. | Refroidisseur de lait à couvercle et agitateur |
-
1998
- 1998-03-30 FR FR9803893A patent/FR2776471B1/fr not_active Expired - Fee Related
-
1999
- 1999-03-30 PL PL99343168A patent/PL343168A1/xx unknown
- 1999-03-30 AU AU29408/99A patent/AU2940899A/en not_active Abandoned
- 1999-03-30 WO PCT/FR1999/000734 patent/WO1999049725A1/fr not_active Application Discontinuation
- 1999-03-30 EP EP99910458A patent/EP1065924A1/fr not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1456029A (fr) * | 1965-09-06 | 1966-05-20 | Westfalia Separator France | Cuve à lait réfrigérante |
DE2041811A1 (de) * | 1970-08-22 | 1972-02-24 | Gustav Kunz | Vorrichtung zum Kuehlen von Milch |
EP0755623A1 (fr) * | 1995-07-25 | 1997-01-29 | Prominox S.A. | Refroidisseur de lait à couvercle et agitateur |
Also Published As
Publication number | Publication date |
---|---|
FR2776471B1 (fr) | 2000-06-02 |
FR2776471A1 (fr) | 1999-10-01 |
PL343168A1 (en) | 2001-07-30 |
EP1065924A1 (fr) | 2001-01-10 |
AU2940899A (en) | 1999-10-18 |
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