DE8715955U1 - Dispenser for sensitive liquids that tend to separate, especially fresh milk - Google Patents

Description

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The invention relates to a dispensing machine for sensitive*

liquids that tend to segregate, especially for

Milk which has a liquid container, a

Homogenization device for the fresh milk, a

Liquid conveying device and a dispensing device

includes. I

The sales methods for fresh milk were subject to

has undergone constant change in recent decades. The If

t· Milk about 40 years ago from cans into open containers j

refilled and about 30 years ago the first experiments for E

S bottling was undertaken* About 15 years ago |

the milk is bottled in disposable packaging. |

Recently, due to the increasing importance |

of environmental protection, start again with the milk in |

the dairy into reusable glass containers, although &psgr;

so that milk is about a third more expensive^ than |

in disposable cardboard packaging. |

But also the filling of milk in reusable glass containers I-

was not without criticism; because the chemical alkalis, with f

which the reusable glass containers are cleaned =

the water strongly. In addition, since the bottling locations are often several k

Hundreds of kilometers away from the sales outlets, > | long journeys are required for the transport of full and _empty milk crates . In addition, many bottles end up in the waste bin after rinsing because they are damaged or
have stubborn residues.

Further experiments were carried out with small milk vending machines
undertaken where the milk is in a disposable container

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* which consists of a plastic bag* However, there are significant problems with the hygienic transport*

Furthermore, a dispensing machine of the type mentioned above is known under the name "steel cow". This is a milk dispensing machine that can be set up in grocery stores. The customer buys a specially developed reusable bottle and dispenses his or her own fresh milk from the machine.* A special milk truck delivers the milk from the dairies and fills the dispensing machines. The dispensing machine itself consists of a container that can hold around 500 to 600 liters of milk. In order to keep the milk in a homogeneous state, there is an agitator inside the container. If milk is needed, it is pumped into a small dispensing container using a pump that sucks the milk from the bottom of the container, from which it can be poured into the reusable bottle using a dispensing device. The filling container also has an outlet opening, with the help of which unused milk can be returned to the main container to be subjected to the homogenization process again. Due to the high capacity of this dispenser, a special cleaning and tank truck is required, which means that very high investment costs are required. Since the dispensers are filled with around 500 to 600 liters of fresh milk, they are only suitable for large supermarkets or the like. It is very difficult to match supply and demand.

It is therefore the object of the invention to propose a dispensing machine of the type described above, which, while complying with hygiene requirements, is also suitable for small

From then on, fresh milk was suitable.

This object is achieved by the characterizing features of claim 1*

Advantageous embodiments of the invention are the subject of subclaims 2 to 6;

According to the invention, a standardized KEG barrel with a capacity of 30, 50 and 100 liters is used as the milk container. These barrels made of stainless steel have been used for 20 years to fill draft beer and are also physiologically safe for fresh milk. By combining different barrel sizes, a good adaptation to the demand for fresh milk can be achieved. This means that a daily requirement of 30, 50, 60, 80, 100 liters, etc. can be met. In addition, the costs for such barrels are relatively low due to the high number of units.

Because the blade that can be inserted into the standardized barrel has a guide device, the compressed air used to convey the fresh product can simultaneously ensure its homogenization.

The invention is explained in more detail below with reference to the embodiment shown in the drawing.

Fig. 1 the basic structure of the

milk dispensers;

Fig. 2 the structure of the milk container

used sword and

Fig. 3 the guide apparatus in section in the

Ebane of its air vents.

As shown in the figure, the milk dispenser essentially consists of a milk container (which is a standardized barrel (KEG) made of stainless steel) that is installed in a closed housing (1-4) and a can (2) that can be inserted into the container (1) and is used to supply compressed air from a compressed air blower (11).

r and transporting the milk from the barrel to the dispensing device

fs ■ ^a

H (13). The dispensing device (13) consists of a

.; Fiaacnenaufnehme (17) And a uinriofrturiu (18) to

5| Mvü-ngen regulation And is in a on the housing (14)

I arranged attachment (15). In the housing (14)

f a cooling unit (16) is also provided, which

1 Tempering the milk to values below +10 ⁰ C serves to

I Compressed air blower (11) is an absolute filter (12)

} . arranged downstream so that the milk in the milk container (1)

|I incoming air has a corresponding sterility.

I With reference to Fig. 2, the structure of the

i The above-mentioned sword and the homogenization

% facility explained in more detail.

The sword (2) that can be inserted into the middle of the milk container (l) consists of a coaxial pair of tubes, i.e. an inner tube (4) and a

Outer tube (3). If the sword is inserted into the milk container (1) I, the inner tube (4) opens just above the

I bottom (9) of the power container (1), whereas the other

S End of the inner tube (4) on the top of the bench

protrudes and represents a connection for the hose line connected to the dispensing device (13). One end of the outer tube (3), however, is at a greater distance from the bottom of the container than the corresponding end of the inner tube f«' ¹ -df when the dispensing device is inserted into the milk container (1), whereas the end located on the outside of the container is connected via a line to the absolute filter (12) and the compressed air blower (11).

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A guide device (5) is attached to the end of the outer tube (3) facing the bottom of the container. This guide device serves to homogenize the milk and deflects the air flowing along the outer tube (3) by 90° towards the side wall of the container (8). The directions of the air ejection openings (10) have a tangential component with respect to the side wall of the container, so that the milk in the container (1) is subjected to a rotary movement, among other things. Fig. 3 shows a horizontal section through the guide device (5), which illustrates the arrangement of the air ejection openings (10). The guide device (5) is designed as a circular disk and has a hole (20*) in the middle that corresponds to the outside diameter of the inner tube (4). When attached, the inner peripheral surface of the bore is in sealing contact with the outer periphery of the inner tube (4), while the outer edge of the end face of the guide device (5) facing the outer tube (3) is in sealing contact with the end of the wall of the outer tube (3) facing the container bottom. This ensures that the air fed into the milk container via the outer tube can only flow into the liquid or milk via the air ejection openings (10) of the guide device (5).

In the area of the container cover 19, the outer tube 3 has a small opening 20 for pressure equalization.

The above-mentioned sword with guide device achieves the following:

The compressed air generated by the compressed air source (11) flows through the absolute filter (12) into the circular cross-section of the outer pipe (3) and exits tangentially and horizontally at the guide device (5). The resulting injection effect condenses the liquid or milk. The resulting flow, which causes homogenization of the milk and is shown schematically in Fig. 2 using lines A, ^A1 , is three-dimensional, ie tangential in the respective direction.

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the direction of rotation specified by the guide device (5), directed vertically upwards on the side wall of the container and directed vertically downwards in the middle of the container. The increase in pressure caused by the introduction of compressed air into the container ensures that when the shut-off device of the quantity regulation device (18) is opened, the homogenized milk can flow through the end of the inner tube (4) that opens just above the bottom of the container (9) to the dispensing device (13) and from there into the milk bottle provided.

The following special features arise as a result of the small opening (20) provided in the outer tube (3) in the area of the container cover (19). When the blower (11) is switched off, the liquid in the outer tube (3) is at the same level as the liquid level in the container (1). When the blower (11) is switched on, pressure acts on the liquid column in the eel (2), causing it to move downwards. As a result, the liquid exits at the guide device (5) and sets the aforementioned flow. The following air follows this flow, whereby the air exit at the small opening (20) is very small. When the blower is switched off, the flow comes to a standstill. As a result of the excess pressure now present, without the opening (2θ), the liquid in the outer tube (3) would rise upwards and exit via the end of the outer tube (3) located on the outside. With the help of the small opening (2Oj), a pressure equalization is established between the interior of the container and the interior of the outer tube (3).

If air were to escape from the guide device (5) immediately after switching on the fan _, no reasonable homogenization would result, since the air would immediately rise to the top due to the buoyancy.

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This can be prevented by specifying the flow direction using the liquid initially in the outer tube (3).

Furthermore, an electrical control is provided which automatically starts the compressed air blower (11) if no milk is removed within a predetermined period of time, e.g. 10 minutes. In this way, the milk is always kept in a homogenized state, regardless of the time intervals between milk removal.

The shut-off device preferably consists of a squeezable piece of hose, as this allows a high flow rate and - what is particularly important - optimal cleaning, as there are no dead spaces in conventional shut-off devices.

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Claims (6)

Expectations: Dispenser for sensitive liquids that tend to separate, especially for fresh milk, with - a liquid container, - a homogenization device, - a liquid conveying device and - a dispensing device, characterized , ·- that the liquid container (1) is a standardised barrel made of stainless steel, - that the liquid conveying device has a spigot (2) that can be inserted into the standardized barrel and consists of a coaxial pair of pipes, whereby the end of the inner pipe (4) located inside the container opens out at the container bottom (9) and the end of the inner pipe (4) located on the outside of the container is connected to the dispensing device (13) and whereby the end of the outer pipe (3) located on the outside of the container is connected to a blower (11) and the end of the outer pipe (3) facing the container bottom (9) is at a greater distance from the container bottom (9) than the end of the inner pipe (4) located inside the container, - that the section of the outer tube (3) located inside the container has a small opening (20) in the area of the container cover (19), and - that the homogenization device is designed as a guide device (5) which is attached to the end of the outer tube (3) located inside the container and has air outlet openings (10) aligned with the inner side wall of the container, the ends of which facing the tube pair axis are connected to the blower (H) via the outer tube. § tt OiIiIl ₁ &idigr; *·*··* 14* I H * » »*4J·· *« II« III 2. Automatic dispensing machine according to claim 1, characterized in that the standardized container (1) is a KEG barrel made of stainless steel otherwise used for draft beer. 3. Automatic dispensing machine according to claim 1 or 2, characterized in that the longitudinal axes of the openings of the guide device (5) run at right angles to the axis of the sword (2) and have a tangential component with respect to the container side wall. 4. Automatic dispensing machine according to one of claims 1 to 3, characterized in that the liquid container (1) is surrounded by a housing (14) in which a cooling unit (16) is located. 5. Dispenser according to claim 4, characterized characterized in that on the housing (14) an attachment is arranged which can accommodate the dispensing device (13). 6. Dispenser according to one of claims 1 to 5, characterized in that the dispenser (13) contains a pipe section which consists of a flexible, squeezable hose to prevent the delivery of liquid.