FI123987B - Catering Casserole - Google Patents

Description

Catering Boiler

The present invention relates to a commercial boiler for mixing and / or preparing foodstuffs, which has a vertical mixing shaft and a housing for a mixing shaft arranged inside the boiler.

Commercial boilers are large heated containers that can have a volume of about 40 to 500 I. Typically, the outside of the pot is a double diaper structure where food is heated by passing steam from the inside and outside, or by generating steam directly between the diapers. The same space is quite commonly used to cool the kettle by passing cold liquid there. These boilers often use a mixing tool during the cooking or cooling phase of the food, which is attached to a vertical or horizontal mixing shaft arranged inside the boiler. In addition to the actual mixing result, mixing provides improved heat transfer during both heating and cooling.

It is an object of the present invention to provide an improved boiler structure which provides enhanced cooling and heating of food to be prepared and / or of food ingredients to be mixed.

To achieve this object, a commercial boiler according to the invention is characterized in that the mixing shaft housing is formed as a double jacket g having a space between the outer jacket and the inner jacket which can be used for heating and / or cooling g and a separate pipe c3. for removing the heating or cooling fluid from the housing or optionally into the housing and / or to remove excess air from the housing.

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LO The solution according to the invention provides several advantages: 30

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2 1) Cooling and heating speeds up as the heating and / or cooling surface area increases by about 10%.

2) Cooling speeds up as cold is transferred from both the center of the pan and the edges to the food. Cooling is possible because a separate pipe is introduced into the housing for removal (or supply) of coolant. If the cooling were to take place only with the shaft housing being double-jacketed, the high flow required for efficient operation would not be possible and thus the cooling would not be as effective.

3) Cooling is also accelerated because the other structure of the kettle and the agitator motor no longer transfer heat through the shaft to the food.

4) Heating speeds up as heat is transferred from both the center of the pan and the edges to the food. Heating is efficient because a separate pipe is introduced into the housing for air removal. If the heating were only done with a double-jacketed pipe, air would remain in the top of the pipe and the heating would not be as efficient (steam is not saturated).

The structure according to the invention is advantageous compared to known solutions because they typically have a movable and cooled / heated agitator member with its axes. In the solution according to the invention, the tubular housing remains in place 20 and only the conventional mixer element without cooling / heating rotates.

The invention will be further described with reference to the accompanying drawing, in which: δ

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Figure 25 is a schematic cross-sectional view of a vertical mixing section according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of a vertical agitator boiler with a vertical agitator shaft according to another embodiment of the present invention.

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The commercial boiler 10 according to the exemplary embodiment shown in Figure 1 comprises a double-shell body having an outer sheath 1, an inner sheath 2 and an empty space 3 therebetween which can be supplied with heating or cooling medium. In the center of the boiler is a mixing shaft housing, which also has a double-shell 5 having an outer shell 4 and an inner shell 5 between which an empty space 6 is formed, in which heating or cooling medium can be introduced. In the embodiment of Figure 1, spaces 3 and 6 are in fluid communication with one another. Inside the inner jacket 4 is a space for the actual mixing shaft 7 to which the mixing member is attached. The agitator shaft is coupled at its lower end to the agitator 10 motor (not shown) in a conventional manner to drive it.

Heating or cooling fluid, e.g. steam or cold water, is supplied to the mixer shaft housing 6 via valve 11, and the fluid is discharged through a separate conduit 8 as well as through outlet bricks 9 in the region of the top of the boiler. By means of the outlet pipes at the top of the boiler and the outlet pipe 8 located in the housing of the mixing shaft, an efficient cooling medium circulation is achieved. When steam is formed in the fluid space 3 of the boiler mantle by heating the water in the space 3, the tube 8 can be utilized to remove excess air therefrom during the initial heating phase. This 20 enhances heating when the air at the top of the enclosure is removed to reduce heat transfer from the enclosure to the food.

The agitator device may also be implemented using a horizontal shaft structure.

S 25 i oj The cooling or heating cycle of the mixer shaft housing can also be performed separately from the cooling cycle of the boiler shell part by connecting the mixer shaft housing σ> Ion outer shell 4 directly to the boiler outer shell 1 of FIG.

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in accordance with. The outer jacket of the housing passes through the inner jacket of the boiler, being securely connected to the inner jacket. The space 6 is provided with a separate feed tube and / or valve means 13 and the tube 8 is used as an outlet tube 6. At the lower end of the tube 8 there are valve means 12 for controlling the fluid discharge. In this case, it is also possible to use more efficient cooling media, such as freon, in which case the casing can in principle be frozen and thus greatly enhance the cooling of the food. The boiler jacket is typically cooled with water.

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Claims (4)

A commercial boiler (10) for mixing and / or preparing food ingredients having a vertical mixing shaft 5 and a housing for the mixing shaft, characterized in that the housing for the mixing shaft is formed as a double shell having a space between the outer shell (4) and the inner shell (5). (6) that can be used for heating and / or cooling, and that a separate conduit (8) is provided inside the housing for conducting the heating or cooling fluid out of the housing or optionally into the housing and / or to remove excess air from the housing. 2. A utility boiler according to claim 1, characterized in that the heating medium introduced into the space (6) is a heated heat transfer medium and / or steam. 15 3. A commercial boiler according to claim 1, characterized in that the cooling medium introduced into the space (6) is a cold fluid. Industrial utility boiler according to claim 3, characterized in that the fluid is water. C \ J δ {M co o o (M X en CL O) o CO m {M δ {M