RU2594856C1 - Food cooking boiler with jacket - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention relates to thermal equipment, particularly to food cooking boilers with indirect heating, in which heating and boiling is carried out using water steam jackets, and can be used at catering enterprises for boiling broth, vegetables, side dishes, as well as production of first courses, compotes, beverages, boiling of milk. This is achieved by fact that food cooking boiler includes housing, accommodating a boiling vessel and steam generator, wherein along whole length of annular space between housing and cooking vessel (boiler jacket) elastic vapor impermeable film-membrane is installed, tightly adjacent to vessel and preventing access of air to it from side of jacket. Steam generated by steam generator of boiler is supplied between cooking vessel and membrane, which is under excessive pressure is expanded and pressed to wall of housing, thus condensing without contact with air. Installation in jacket space of boiler elastic membrane separating heating steam from air, ensures preservation of intermediate heat carrier in steam generator, thus excluding losses of heat with releasing of steam into environment and reducing time of food cooking boiler heating by 14 %. At that, food cooking boiler operating in sealed mode, eliminates corrosion of jacket housing, not contacting with heating steam, provides absence of scale formation on surface of electric heaters, increasing service life of device, does not require installation of double safety valve, reduces service personnel labor costs.

EFFECT: higher heat efficiency of food cooking boiler, reduced time of heating by 14 %, lower service personnel labor costs and longer service life.

1 cl, 4 dwg

Description

The invention relates to heating equipment, in particular to indirect heating kettles, in which heating and cooking are done using steam-water shirts, and can be used in catering for cooking broths, vegetables, side dishes, as well as cooking first courses, compotes, drinks, boiling milk.

Closest to the claimed technical solution is a kettle electric kettle KPE-60, containing a cooking tank with a steam-water jacket, for the heating of which tubular electric heaters are used [1].

A disadvantage of the known boiler is the high cost of heat for heating the structure associated with the need to perform the operation of removing air from the jacket space of the apparatus (purge) for each cooking cycle. At the same time, the heating time of the boiler increases, the microclimate in the area of operation of the apparatus deteriorates. In addition, when replenishing losses of the intermediate coolant, corrosive substances enter the jacket space, causing corrosion of the jacket wall and scale formation on the surface of electric heaters, which reduces the life of the boiler.

The invention is aimed at increasing the thermal efficiency of the kettle, reducing the heating time by 14%, reducing the labor costs of maintenance personnel and extending the life of the apparatus.

This is achieved by the fact that the digestion boiler contains a housing, a cooking vessel and a steam generator placed in it, and throughout the annular space between the housing and the cooking capacity (boiler jacket), an elastic vapor-proof film-membrane is installed that is adjacent to the vessel and excludes air access to it from the shirt side. Water vapor produced by the boiler’s steam generator enters between the brewing vessel and the membrane, which, under excessive pressure, inflates and presses against the wall of the cabinet, thereby condensing without contact with air.

The invention is illustrated by drawings, where in FIG. 1, 2, 3, 4 shows a kettle with cuts.

The digestion boiler contains a housing 1 (Fig. 1) surrounded by thermal insulation 2, inside of which there is a cooking vessel 3, closed by a lid 4. The walls of the cooking vessel and the housing form a steam-water jacket 5, to the lower part of which a steam generator with tubular heaters 6 and a level 7 crane are attached . In the annular space between the wall of the housing 1 and the wall of the cooking brewing vessel 3, an elastic vapor-tight membrane 8 of the brand "FORSIL®" [2] is placed, fastened with its upper part to the brewing vessel 3 and the body using flange connections y 1, and the bottom - to the steam generator 6. Membrane "FORSIL®" has the following characteristics: temperature operating range of -60 ° C to + 230 ° C, the conditioned strength of 9 MPa, elongation up to 600%, a thickness of 1 mm. In this case, the membrane 8 on one side is adjacent to the cooking vessel, and on the other side forms an air cavity between itself and the casing 1, communicating with the atmosphere through an opening with a finely porous mesh 9. A level 7 valve with a capillary tube under the base of the cooking vessel is installed on the steam generator 6, a stand 10 with an electric contact pressure gauge 11, a safety device 12 and a filling funnel 13. The flange connections of the elastic membrane 8 with the brewing vessel 3, the housing 1 and the steam generator 6 are rounded s, preventing damage to the material thereof. See FIG. 3, 4.

The boiler operates as follows.

After filling the steam generator 6 with the working fluid through the filling funnel 13 to the norm, the level 7 tap and the filling tap 14 are closed. In this case, the residual air is almost completely removed from the steam generator 6 through the capillary tube of the level 7 tap. The tubular heaters of the steam generator 6 are turned on. As the heating medium and the heat carrier evaporate, its vapor is pressed out of the membrane 8 from the surface of the cooking vessel 3 and the cavity formed is filled, giving away the hidden cavity the heat of vaporization of the walls of the vessel 3, see FIG. 2. Expanding, the membrane 8 is pressed against the walls of the housing 1, forcing air out of the jacket space through the opening 9 into the atmosphere, and the air leaving the jacket space does not come into contact with steam. Then begins the heat treatment of the contents of the cooking vessel. When the boiler is turned off and cooled in the cavity between the cooking vessel 3 and the elastic membrane 8, a vacuum is formed due to steam condensation, as a result of which the membrane 8 is pressed back against the cooking vessel. In the subsequent cycle of operation, the kettle does not require replenishment of the intermediate coolant, i.e. the boiler will work in hermetic mode.

The installation in the boiler jacket space of an elastic membrane separating the heating steam from the air ensures the preservation of the intermediate heat carrier in the steam generator, thereby eliminating the loss of heat with the release of steam into the environment and reducing the heating time of the digestion boiler by 14%. In addition, this design of the hermetic boiler operating in a sealed mode eliminates corrosion of the jacket body, which is not in contact with heating steam, ensures that there is no scale formation on the surface of electric heaters, increasing the service life of the apparatus, does not require the installation of a double safety valve, and reduces labor costs for maintenance personnel.

List of literary sources

1. Botov M.I. Thermal and mechanical equipment of trade and public catering enterprises: a textbook for the beginning. prof. education / M.I. Botov, V.D. Elkhina, O.M. Golovanov. - 5th ed. - M.: Publishing Center "Academy", 2012. - 496 p.

2. [Electronic resource] // http://forkom.ru URL: http://forkom.ru/catalog/silikon/silikonovie_membrani/?post_id=199

Claims (1)

A digestion boiler containing a housing, a cooking vessel and a steam generator, characterized in that throughout the annular space between the housing and the cooking vessel there is an elastic vapor-proof membrane attached with its upper part to the cooking vessel and the housing with flange connections, and the lower to the steam generator, moreover, adjacent to the vessel and excluding access to it from the side of the shirt.

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