DE2052152B2 - DEVICE FOR FREEZING FOOD IN A CONTACT FREEZER - Google Patents

Description

The invention relates to a device for freezing food in a contact freezer with higher floors by means of cargo carriers for the to

65 freezing food between contact plates, the inner cavity of which is flowed through by a cooling medium in the circuit via a refrigeration machine, the contact freezer arranged behind a central filling point having height-adjustable contact plates which can be lifted from their lateral support devices periodically by means of lifting crossbars arranged below the plates and with the interposition of the frozen food are compressible, and the contact freezer has sliding rails arranged in layers one above the other on both long sides as lateral support devices for the goods carriers between the height-adjustable contact plates, the goods carriers being slidable on their sliding rails each time after lifting the contact plates without touching the contact plates by a Guisträger length and after passing through at intervals all floors in alternating directions with the help of lowering devices on the front - via a central unloading station to the central one Filling point are returned according to patent 20 10 537.7.

Ej has already been suggested so far To a large extent automate the manually operated food freezing process (DT-PS 20 10 537). This is achieved by the fact that the material carriers in the course of a partially continuous movement cycle loading and unloading at a central point and through the individual levels of the contact freezer on slideways with periodic lifting of the contact plates arranged between slideways and with implementation the front sides of the contact freezer moved from one floor to the next from the loading to the unloading station will.

During the time the contact plates are pressed against the material carriers, some material carriers always remain open the lowering devices arranged on both front sides of the contact freezer stand, which then do not come through the contact plates are cooled. This results in interrupted cooling times. This diminishes the The throughput of such a contact freezer is considerable.

The invention is based on the object of providing a contact freezer with a high throughput create.

This object is achieved according to the invention in that the lifting times of the contact plates for movement the material carriers are each shorter than the pressing times of the contact plates on the material carriers and that all material carriers are in the plate stack during the pressing times of the contact plates, while the Lowering devices on the front sides of the contact freezer are free of material carriers.

The pressing time of the contact plates on the material carriers is at least 20 seconds and the lifting time of the contact plates from the material carriers for their transport movement is 10 to 20 seconds.

It proves to be particularly advantageous if slide-in devices each have one for displacement Goods carrier between two contact plate pressings in the stacking levels with even numbers back to front, or in the stacking levels with odd numbers from front to back, provided are and if lowering devices are provided, which the excavated material carriers in each case in the next Move right floor.

In the case of smaller units, it is also possible, if necessary, to provide a contact freezer in this way that for Gutsträgertransport through the contact freeze

'■ f

an insertion device for moving one material carrier in each floor, from the entry above beginning to the opposite side and from there to the transfer to the next lower one Floor or exit is provided

A preferred embodiment of the device is to be based on FIG. 1 to 5, for example, closer explained.

Fig. La) b) is a side view of the entire Facility;

Fig.2 is a section along the line 11-11 in Fig. La with raised contact plates;

Fig..3 is a section along the line III-1II in Fig. La with pressed contact plates;

4 is a diagram of a device according to Claim 3;

FIG. 5 is a diagram of a device according to claim 4.

The material carrier 2 is provided at the central filling point 1. The Gutträger can be used as a bowl with or be designed without a cover. With the help of a scale 3, the portion to be filled is weighed and over the Chute 4 introduced into the gut carrier

However, already packaged portions can also be placed in the tray in a specific formation will. In this case the automatic loading device 5 is used. The packaged portions are pushed over the sheet 6 into the material carrier.

The filled material carrier arrives through an elevator 7 in the height of the uppermost slide and is through the Pushing device 8 pushed into the top tier of the contact freezer 10.

In this way, the trays are dried by means of heated contact plates 9 or also correspondingly heated fans.

The contact plates 11, the inner cavity of which is circulated by a coolant via a refrigerating machine is traversed, during the transport route corresponding to a material carrier with the aid of the hydraulically actuated lifting beams 12 lowered down. Each of the individual contact plates lies down a support 13 so that the position of each plate is precisely fixed.

On the contact plates slide rails 14 are attached laterally, on which the shells 2 with corresponding Slide shoes 15 rest in the open state (Fig. 2).

This creates between two contact plates 11 a certain gap that allows the shells to rest on the two contact surfaces during sliding prevented. If the pushing process is ended, the lifting cross member 12 is moved upwards again until the Contact plates rest firmly against the shells 2 (FIG. 3). The contact remains until the next insertion takes place

The shells 2 are moved from one floor to the next by hydraulically operated lowering devices 16 and 17 on both ends of the contact freezer.

The lateral displacement of the individual material carriers on the slideways is carried out by the insertion devices 18 and 19 also from both ends of the contact freezer.

At the end of the passage of the goods carriers through all the levels of the contact freezer, the Good carriers slightly thawed by heated contact plates 20. A subsequent transport device 21 conveys the trays to the unloading point 22, with a rotation of the goods carriers by 180 ° at the same time is performed. A vibrating device 23 is used for emptying. The emptied frozen food arrives z. B. on the conveyor belt of the unloading point 22 indicated here.

The emptied bowl then arrives at the cleaning station 24 and from there it is turned again brought back by 180 ° to filling point 1

Naturally, other types of construction for loading and unloading the goods carriers etc. are also possible. E.g. it is possible to have fans arranged on the side to improve the heat transfer (cold air circulation) to be provided.

The insertion device 19 on the rear face of the contact freezer is now in a special way extended insertion arms 19 'and provided with a double insertion stroke. So can accordingly the scheme of FIG. 4 after pressing (process P) and lifting off the contact plates (process A) with the insertion device 19 initially on the floors with even numbers 2 '4', 6 '... (from above beginning with numbered) the rearmost crop carrier is pushed forward by one crop carrier length (process 1 "), so that there are gaps at the back on these floors.

The foremost material carriers of these floors are thereby moved forward onto the lowering device 16 pushed out (1 "), then lowered (2") and from the insertion device 18 into the respective underneath lying floors 3 ', 5' ... pushed in (3 ").

At the same time, a new material carrier is pushed in at the top (3 ").

This means that on floors Γ, 3 ', 5' ... the last The crop carrier is pushed out onto the lowering device 17 (3 ") at the rear.

Subsequently, the lowering device 17 is lowered (process 4 ″) and the material carriers are by means of a normal stroke of the insertion device 19 in the gaps created during operation 1 "on floors 2 ', 4', 6 '... of the plate stack pushed in (5 ").

In this way it is possible to get by with relatively short transport times for the goods carriers, so that the pressing times of the contact plates on the material carriers make up the greater part of the total time. This significantly increases the throughput of the system. Such a device can now with a daily output of around 501 frozen goods can be provided.

For smaller units or special cases, it can also be advantageous to use a different flow chart for the Contact freezer according to FIG. 5 to be provided.

Then after lifting the contact plates from the material carriers on the top floor Γ a Fresh product carrier pushed in (process 1 '") and thus a product carrier at the back of the lowering device 17 extended. This is lowered (2 '") and the material carrier from behind by means of the insertion device 19 pushed into the floor 2 '(3' ").

The (3 '") material carrier, which is pushed out at the same time, is lowered (4'") and to the next floor below pushed in (S '") etc. until a fully cooled material carrier is pushed out on the lowest floor (H'"), the is then passed on for defrosting, emptying, rinsing, filling, etc., as described above.

For this purpose 4 sheets of drawings

Claims (4)

Patent claims: 1. Device for freezing food in a contact freezer with several levels by means of carriers for the food to be frozen between contact plates, the inner A cooling medium flows through the cavity in the circuit via a refrigeration machine, the has height-adjustable contact plates arranged behind a central filling point, which are lifted from their lateral support devices by means of lifting beams arranged below the plates are periodically liftable and can be compressed with the interposition of the frozen food, and the Contact freezer, one on top of the other, on both long sides as sliding rails Lateral support devices for the material carriers »wipe the height-adjustable contact plates • It has the goods carriers on their sliding rails after the contact plates have been lifted off are slidable without touching the contact plates by a good carrier length and - after step through all floors in alternating directions with the help of frontal On the other lowering devices - via a central unloading station to the central filling station are according to patent 20 10 537.7, characterized in that the lifting times of the Contact plates (11) for moving the material carrier (2) each shorter than the pressing times of the Contact plates (11) on the material carriers (2) are and ate themselves during the pressing times of the contact plates (11) all material carriers (2) are in the plate stack, while the lowering devices (16,17) are on the front sides of the contact freezer free of Good carriers (2) are. 2. Device according to claim 1, characterized in that that the pressing time of the contact plates (11) in the material carriers (2) in each case at least 20 Seconds and the lifting time of the contact plates (11) from the material carriers (2) for their transport movement 10 to 20 seconds. 3. Device according to claim 1 or 2, characterized in that insert devices (19,18) for the displacement of one material carrier each, two contact plate pressings in the Stacking levels with even numbers (2 ', 4', 6 ', ...) from back to front, or in the stacking levels with odd numbers (Γ, 3 ', 5', ...) from front to back, are provided and that lowering devices (16, 17) are provided, each of which moves the extended goods carriers to the next lower level offset. 4. Device according to one of claims 1 to 3, characterized in that the material carrier transport through the contact freezer insert devices (18, 19) for shifting one at a time Gutträgers (2) in each egg: age starting from the entry at the top to the opposite side and from there intended for relocation to the next floor or exit are.