SK110896A3 - Process and device for deep-freezing conical minced meat products, especially donair kebab cones and device for carrying out this method - Google Patents

Abstract

The process is distinguished in that a stainless steel tube (12) is inserted into the longitudinal axis of the minced meat product (10) to be frozen, the product (10) is inserted into a freezing chamber (1) so that about half of it is immersed into a coolant and is then deep-frozen both internally and externally at the same time, whereby the coolant is conducted by the inserted stainless steel tube (12) and the part of the product (10) not immersed in the coolant is sprinkled with coolant. The device consists of a heat-insulated freezing chamber (1) with a floor (2), four wall sections (3, 4, 5, 6), a hinged cover (7) and a coolant inlet (9) and outlet (11). The upper end of the stainless steel tube (12) is connected to a coolant sprinkler (13) and the lower end is connected via a coupling (14) to the coolant inlet (9). At the start of the deep-freezing process the freezing chamber (1) is about half-filled with coolant. Alternatively, use is made of loading frames consisting of a tubular frame structure with a continuous internal cross-section with a central coupling fitted at its top and bottom.

Description

Method and apparatus for deep-freezing cone-shaped minced meat products, in particular Doner's kebab meat cones

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a method and apparatus for deep-freezing cone-shaped minced meat products, in particular Doner kebab meat cones, the apparatus comprising a thermally insulated bottom-freezing chamber, four wall panels, a hinged lid and a refrigerant supply line and from the coolant drain line.

BACKGROUND OF THE INVENTION

Methods and apparatus for deep-freezing meat are generally known. The pieces of meat are brought into direct or indirect contact with the coolant.

According to Council Directive of the European Communities no. 88/657 / EEC of 14 December 1988, the meat and meat preparations to be marketed in deep-frozen form must reach a core temperature of less than -18 ° C at the latest after four hours.

Given the volume of Doner's kebab meat cones, deep freezing using known methods and equipment is very expensive on the one hand and on the other hand the above-mentioned standards of the Council of the European Communities are not feasible.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for deep-freezing conical minced meat products, in particular Doner kebab meat cones, which guarantee economically advantageous deep-freezing, while respecting the criteria of EC Directive No. 88/657 / EEC.

SUMMARY OF THE INVENTION

According to the present invention, the method of deep-freezing conical minced meat products, in particular Dereer kebab meat cones, consists in inserting a stainless steel pipe into the longitudinal axis of the conical minced meat product to be cooled, and placing the minced meat product into the freezing chamber so that it is about half-immersed in the coolant and the minced meat product is then deep-frozen at the same time inside and out no later than four hours at a core temperature of at least -18 ° C by passing the coolant through an inlet pipe The non-immersed portion of the minced meat product is sprinkled with the refrigerant, and nitrogen gas is pumped into the free space of the freezing chamber above the level of the refrigerant before taking the deep-frozen minced meat products.

The principle of the method is furthermore to place a stainless steel tube in the longitudinal axis of the conical minced meat product to be cooled, to place the minced meat product in the freezing chamber, and then to deep-freeze within four hours at the same time with a core temperature of at least -18 ° C in such a way that the outer surface of the minced meat product and from the top into the stainless steel tube are sprayed, respectively, with the aid of a nozzle. Liquid ethanol is injected and nitrogen gas is pumped into the free chamber of the freezing chamber above the level of the refrigerant before taking the deep-frozen minced meat products.

It is also an object of the invention that liquid ethanol or nitrogen is preferably used as the cooling agent.

The invention also relates to a device for deep-freezing conical minced meat products, in particular Doner kebab meat cones, consisting of a thermally insulated freezer chamber with a bottom part, four wall parts, a hinged lid as well as a coolant supply line and a coolant outlet line means, characterized in that the longitudinal axis of the conical minced meat product is a stainless steel tube, the upper end of which is connected to a spray-cooling means for spraying a coolant and the lower end of which is connected to a coolant supply line via a coupling and that over the coolant spraying device is formed a pin which engages a longitudinal bore in the bearing rack which is arranged above the coolant spraying device on the longitudinal wall of the freezing chamber, the longitudinal rotation of the the raft is formed as a closable hinged circular segment piece and that the freezing chamber is about half-filled with coolant at the beginning of deep freezing, as well as alternatively a tubular, frost-resistant plastic foil arranged on the top and bottom is arranged around the conical minced meat product. the lower end of the stainless steel tube sealed by the coolant inlet collar, is further characterized by a charging frame consisting of a tubular frame structure with a passage internal cross-section, on the upper and lower sides of which they are arranged one central and one respectively. the lower side has two pairs of wheels and two opposite spacers and two brackets are attached to the front sides.

The advantages achieved by the invention are that by introducing a stainless steel pipe connected to a coolant supply line into the longitudinal axis of the conical minced meat product, using a coolant spraying device and immersing it in a freezing chamber half filled with coolant, the minced meat product at the same time freezes deep inside and out. This will allow economically advantageous deep freezing, while complying with EC standards.

The invention is explained in more detail below with reference to an exemplary embodiment. In the respective drawings, they show:

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a cross-sectional front view of the device according to the invention;

Fig. 2 is section A-A of Fig. 1;

3 shows two stacked, movable charging stands.

DETAILED DESCRIPTION OF THE INVENTION

As seen in Figs. 1 and 2, the device according to the invention for deep-freezing conical minced meat products, in particular Doner Kebab meat cones, consists of a thermally insulated freezer chamber 1 with a bottom part 2, two transverse walls 3 and 4, two longitudinal walls 5 and 6, as well as a hinged lid 7, which is provided with a heated pressure-equalizing valve 8 and with heating of the lid frame. The lower part of the transverse wall 3 is a coolant supply line 9 which extends along the lower part 2 and is equipped with branches and couplings 14 to each of the vertically standing conical products 10 of minced meat.

The lower part of the transverse wall 4 is a conduit 11 for coolant flow. The coolant supply line 9 and the coolant outlet line 11 are connected in a known manner to a circulation device and a cascade cooling device in which the coolant is cooled to the temperature at which it is introduced into the chamber, -30 to -70 ° C.

To treat Doner's kebab, a cardboard tube with a diameter of about 22 mm is located in the longitudinal axis of the meat cone.

When preparing deep-freezing, a stainless steel tube 12 is inserted in the minced meat product 10 instead of the cardboard tube. Further, at the upper end of the stainless steel tube 12, a roof-shaped device 13 is provided for spraying with coolant, on the roof of which a pin 15 is formed.

Above the coolant spraying device 13 on the longitudinal wall 5, respectively. 6, a bearing rack 16 is provided in each case in the freezing chamber 1, which has a longitudinal opening in its front part into which the pin 15 and the folding segment segment are engaged.

Deep freezing of the conical minced meat products 10 is carried out as follows:

The lid 7 of the freezing chamber 1 is opened and the minced meat products 10, equipped with a stainless steel tube 12 and a coolant spraying device 13, are individually inserted into the freezing chamber 1, which is about half filled with coolant.

Liquid refrigerants which are commonly used in refrigeration technology, but preferably liquid ethanol or nitrogen, can be used as the refrigerant.

When the minced meat products 10 thus prepared are placed in the freezing chamber 1, the lower part of the stainless steel tube 12 engages the coupling 14 and the upper part of the stainless steel tube 12 is placed in the longitudinal opening of the bearing rack 16.

The hinged ring segment piece on the front portion of the bearing frame 16 is closed with a closure to create a hole corresponding to the diameter of the pin 15. In this way, the minced meat product 10 is secured against overturning from a vertical position.

The individual deposition of the minced meat products 10 into the freezing chamber 1 described above is of course expedient only when a relatively small number of conical minced meat products 10 are to be frozen at the same time.

In order to avoid the disadvantageous consequences of the longer opening of the lid 7, in particular in the deep freezing of a plurality of pieces of minced meat products 10, the mobile charging stands 18 shown in FIG.

These charging stands 18 consist of a tubular frame structure 19 with an internal cross-section which is passable. Several rows of minced meat products 10 are arranged within the charging rack 18 in the manner shown. At the bottom and top of such a charging stand 18, the tubular frame structure 19 is provided with one central connector 20 and 21 each.

Further, the underside of the charging stand 18 has two wheel pairs 22 and the fronts have two opposite spacers 23.

The charging stands 18 are shaped so that they can be folded on top of each other, with the two holders 24 and 25 fixed at each end to ensure sufficient adjustment.

The minced meat products 10 filled with the charging racks 18 are inserted into the freezing chamber by means of the lifting technique.

1. In this case, the central coupling 20 of the first charging stand 18 engages the coupling 14 of the coolant supply line 9 so that coolant can flow through the entire tubular frame structure 19.

The spacers 23 rest on the transverse walls 3 and 4 of the freezing chamber 1, thus ensuring a precise adjustment of the previously inserted charging rack 18.

If a second charging stand 18 is now mounted on the first charging stand 18, its lower central connector 20 engages the upper central connector 21 of the first charging stand 18 so that coolant can also flow through the tubular frame structure 19 of the second charging stand 18.

Depending on the size of the freezing chamber 1, not only a plurality of charging racks 18 can be inserted one above the other, but also one after the other.

After the freezing chamber 1 has been loaded, the lid 7 is closed and the coolant supply line 9 is opened. The coolant is discharged from the coolant supply line 9 through the stainless steel tube 12 to the coolant spraying device 13 by spraying the upper portion of the minced meat product 10 which is not immersed in the coolant.

According to one variant of the method, after the freezing chamber 1 has been introduced with the minced meat products 10 and the lid 7 or the front longitudinal wall has been closed, the doors formed on the outer surfaces of the minced meat products 10 and through the coolant supply line 9 minced meat, by means of a nozzle into the stainless steel tube 12, inject respectively.

injects liquid ethanol. In this variant, the coolant spraying device 13 is dispensed with.

When spraying or spraying as well as dipping the minced meat product 10 into the coolant level present in the freezing chamber 1, an ice layer is formed immediately so that the coolant is no more in direct contact with the deep freezing process product of 10 minced meat.

In order to prevent health or qualitative impact of the minced meat product 10 by direct contact with the coolant, which cannot be excluded with the use of valuable coolants, a tubular, frost-proof foil 17 of plastic is arranged around the minced meat product 10 before being placed in the freezing chamber. The material is sealed at the upper and lower ends of the stainless steel tube 12 by means of a collar to prevent the ingress of coolant.

Upon completion of the deep freezing, the coolant supply line 9 closes again, the lid 7 is opened, in the case of individually stored minced meat products 10, the closure on the tilting ring segment is released and the deep-frozen minced meat product 10 is removed from the freezing chamber 1.

When the charging racks 18 are used, these are lifted out of the freezing chamber 1 by means of a lifting technique after the lid 7 has been opened and the deep-frozen minced meat products 10 are removed from the charging racks 18 as prescribed.

The stainless steel tube 12 is then heated briefly by means of hot steam or a heating rod, pulled out of the minced meat product 10 and the cardboard tube is inserted therein.

When the lid 7 of the freezing chamber 1 is opened, the coolant used comes into contact with air containing moisture. As a result, ice crystals can form in the coolant, affecting the coolant flow.

To prevent this, a filter for collecting ice crystals, not shown in the figure, is provided outside the freezing chamber 1 in the coolant drain line 11.

In order to prevent or at least reduce the formation of ice crystals, it has proven expedient to inflate nitrogen gas into the free space of the freezing chamber 1 above the coolant level before opening the lid 7. Since nitrogen is heavier than air, a protective layer is formed above the coolant level.

Claims (4)

PATENT CLAIMS Method for deep-freezing conical minced meat products, in particular Doner kebab meat cones, characterized in that a stainless steel tube is inserted into the longitudinal axis of the conical minced meat product to be cooled, and the minced meat product is introduced into the minced meat freezing chamber so that it is about half-immersed in the coolant, and the minced meat product is then deep-frozen at the same time inside and out no later than four hours at a core temperature of at least -18 ° C by passing the coolant through the stainless steel pipe; a portion of the minced meat product immersed in the coolant is sprinkled with coolant, and nitrogen gas is pumped before the deep-frozen minced meat products are taken into the free space of the freezing chamber above the coolant level. Method for deep-freezing conical minced meat products, in particular Doner's kebab meat cones, characterized in that a stainless steel tube is inserted into the longitudinal axis of the conical minced meat product to be cooled, and the minced meat product is introduced into the minced meat freezing chamber and then simultaneously inside and out at the latest ?? deep freeze within four hours with a core temperature of at least -18 ° C in such a way that the outer surface of the minced meat product and from above into the stainless steel tube are sprayed with a nozzle, respectively. Liquid ethanol is injected and nitrogen gas is pumped into the free chamber of the freezing chamber above the level of the refrigerant before taking the deep-frozen minced meat products. Method according to claim 1, characterized in that liquid ethanol or nitrogen is preferably used as the cooling agent. 4. Apparatus for deep-freezing conical minced meat products, in particular Doner's kebab meat cones, consisting of a thermally insulated freezer chamber with a bottom panel, four wall panels, a hinged lid as well as a coolant supply line and a coolant outlet line; characterized in that the longitudinal axis of the conical minced meat product (10) is a stainless steel tube (12), the upper end of which is connected to a spray-cooling device (13) and the lower end of which is via the coupling (14) ) in conjunction with a coolant supply line (9) and that a pin (15) is formed above the coolant spraying device (13) to engage a longitudinal bore in the bearing rack (16) disposed above the device (13). ) for spraying coolant on the longitudinal wall (5, 6) of the freezing chamber (1) at wherein the longitudinal opening is made closable by a foldable circular segment piece, and that the freezing chamber (1) is about half-filled with coolant at the beginning of the deep freezing, and alternatively a tubular, frost-proof foil is arranged around the conical minced meat product (10). (17) of plastic material, which is sealed at the upper and lower ends of the stainless steel tube (12) by means of a coolant collar, further characterized by a charging frame (18) consisting of a tubular frame structure (19) with a through inner a cross-section, at the top and bottom of which are arranged one central coupling (20, respectively). 21), as well as the underside thereof, has two wheel pairs (22) and two opposing spacers (23) and two brackets (24 and 25) are attached to the end faces.