RU2453779C1 - Device for poultry chilling by carbon dioxide - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: proposed device comprises isolated casing, conveyor, device to feed carbon dioxide directly into poultry, line of nozzles communicated with carbon dioxide gas feed pipeline and blowers arranged at device top section to create intensive circulation of air-gas medium.

EFFECT: reduced consumption of coolant, increased intensity of heat exchange.

8 dwg

Description

The invention relates to refrigeration, and in particular to devices for the refrigeration processing of poultry carcasses. An advantageous object of the invention is the refrigeration treatment of poultry carcasses with carbon dioxide by feeding it in a snowy phase into the internal cavity of the bird and gaseous CO ₂ on the surface of the carcasses.

A known apparatus for the refrigeration processing of food products with carbon dioxide, including a thermally insulated body, pipelines with installed nozzles for supplying carbon dioxide, a fan for creating air-gas medium circulation in the chamber and a conveyor for moving the product [1].

The closest in technical essence and the achieved effect is a device for cooling poultry carcasses with carbon dioxide, consisting of a throttle device and a device for supplying CO ₂ directly to the product [2].

The disadvantages of the known inventions are the increased consumption of carbon dioxide, due to its inefficient use, low heat transfer rate, leading to an increase in the time of refrigeration processing.

An object of the invention is to reduce the consumption of carbon dioxide during refrigeration and increase the intensity of heat transfer.

In order to implement the technical task, namely to reduce the consumption of carbon dioxide during refrigeration processing, a comprehensive treatment of poultry carcasses with carbon dioxide in the apparatus is provided. Its supply in a snowy phase to the internal cavity of the carcasses through a metering generator and gaseous CO ₂ to the surface of the carcasses through nozzles, and axial fans are provided in the apparatus to increase the heat transfer rate.

Figure 1 shows the proposed apparatus, a General view; figure 2 shows a section of the apparatus aa; figure 3 presents the mechanism for supplying carbon dioxide into the carcass in position in the absence of product; figure 4 shows the mechanism for supplying CO ₂ in position with the failed product; figure 5 shows an image of the nozzle used in this invention for supplying gaseous CO ₂ to the apparatus; figure 6 shows a diagram of temperature control and supply of carbon dioxide for this unit.

The device consists of a stationary insulated housing (1). The inner casing is made of stainless steel sheet, and the outer casing is made of aluminum sheet. Thermal insulation is laid between the casing. On two opposite sides of the apparatus body there are windows equipped with flexible shutters located inside (16) and outside the chamber (15), through which the overhead conveyor is fed and exited. The conveyor has a guide (2) along which the carcasses of the bird (3) are moved, suspended on the carriages (4) by means of a chain transmission (5).

To feed snowy carbon dioxide into the internal cavity of the carcass inside the chamber on a movable rod (6), dispenser generators (9) are installed, to which carbon dioxide is supplied via a pipeline (8). Controlled feeding of CO ₂ is a solenoid valve (7), which is controlled via a time relay (17).

Gaseous carbon dioxide is supplied to the apparatus through a series of nozzles (14) installed on pipelines laid along the entire length of the insulated casing (11). To create an air-gas medium circulation, axial fans (12) are provided in the upper part of the apparatus, the drives of which are driven by electric motors (13).

The device operates as follows.

The pre-gutted bird carcass (3) is fixed in the suspension (4) and, through a chain transmission (5), is fed along the guide (2) through the outer and inner flexible curtains (16, 15) into a heat-insulated chamber (1). When the product moves along the conveyor (2), the carcasses of the bird fall into the plane of action of the photocell (36), while the conveyor stops. From the photocell (36), a signal is sent to the time relay (17), which opens the solenoid valve (7) mounted on the liquid pipe (10), and sends a signal to the stepper motor (29), which moves the nut using a flexible element (30) (32). The nut (32), overcoming the action of the spring (35), exerts pressure on the edges of the plates (31), which have grooves in which the slots (34) are installed, fixed on the device (33) with a pin. The plates (31) on the opposite side open.

At the same time, liquid carbon dioxide is supplied through an open solenoid valve (7) to a device for introducing a metering generator into the product (6). In the cavity (19) through the liquid pipe (18) under pressure greater than the total force of the springs (24), carbon dioxide is supplied, under the action of which the piston (22) moves to the product (3). The piston (22) is connected through a pipeline to the fitting (26) of the metering generator (9). When the dispensing generator (9) reaches the required depth, the pushers (20) interact with the stops (23), opening the valves (21), as a result of which carbon dioxide is supplied to the throttle washer (27), passes through a T-shaped hole, throttled and snowy СО _{2 is} emitted into the cavity of the bird carcass (3) through the device for supplying СО ₂ (33). After passing the interval specified by the time relay, the valve (7) closes, thereby blocking the flow of liquid CO ₂ to the throttle washer (27). At the same time, the time relay turns off the stepper motor (29), and the spring (35) ensures that the plates (31) are in contact with the device body (33) in the initial position.

Through the check valve (25), pressure is released from the cavity, and under the action of the springs (24), the piston (22) with the dispensing generator (9) returns to its original position. A time relay (17) sends a signal to start the conveyor (2), and the bird carcass (3) leaves the plane of action of the photocell (36). This position of the carbon dioxide supply mechanism inside the product is shown in FIG.

Further, the carcasses of the bird, moving by a conveyor (2) inside the chamber (1), are treated with gaseous carbon dioxide supplied through a series of nozzles (14). Carbon dioxide in the gas phase enters a series of nozzles (14) through a pipeline (11).

The nozzles are shown in FIG. 5, they include a cylindrical cavity (37), inside of which in the upper part there are radially guiding channels (42), which direct CO ₂ to the axial hole (43). The hole consists of three sections of a cone-shaped configuration, which allows you to change the angle of gas exit and change its speed (45). A crushing device (38) is screwed into the cylindrical cavity (37). The crushing device has longitudinal channels (39), into which CO ₂ is supplied.

Carbon dioxide, moving along the longitudinal channels (39), enters the radially inlet windows (40), which end with an annular cavity (41) directly connected with the radial-guiding channels (42).

The gas sprayed from a number of nozzles (14) with particles of solid CO ₂ will come into contact with the outer surface of the carcass and thereby will intensify the freezing process.

The problem of regulating the flow and undesired throttling in the nozzles (14) with the formation of solid carbon dioxide, clogging the nozzle through section, is solved by the automatic control of carbon dioxide supply and temperature in the chamber shown in Fig. 5.

Automatic temperature control of the mixture is carried out using a temperature controller (51), as well as two solenoid valves (53, 54). The solenoid valve (54) is installed on the liquid line (57), and the valve (53) on the gas line (49).

If in the heat-insulated chamber (1) the temperature of the air-gas mixture reaches its lower limit minus 73 ° C, then the temperature controller (51) acts on the solenoid valve (53) and it opens. At the same time, the valve (54) closes from the pulse of the temperature controller (51), stopping the flow of liquid carbon dioxide from the tank. For a period of time, the time relay (52) leaves the solenoid valve (54) open; high pressure is maintained in the manifolds (11) and nozzles (14), which also guarantees the removal of liquid carbon dioxide from the system into the chamber (1) and the nozzles (14) are purged with gas. After the installation time has passed, the time relay (52) also closes the solenoid valve (53). When the temperature of the air-gas mixture in the insulated chamber (1) increases to minus 65 ° C, the temperature controller (51) opens the solenoid valve (53). The pressure in the manifolds (11) and nozzles (14) increases, and the nozzles are again purged with gas. The time relay (52) closes the solenoid valve (53) and opens the solenoid valve (54), supplying liquid carbon dioxide to a number of nozzles (14).

To create a uniform temperature field and increase the speed of freezing poultry carcasses in a freezer, fans (12) powered by electric motors (13) are used.

After the zone of poultry refrigeration treatment has been passed through carbon dioxide supplied through a series of nozzles, the carcasses fixed in the suspension (4) are discharged by a conveyor (5) through a conveyor (2) through an inner and outer flexible curtain (15, 16) from a heat-insulated chamber (1) )

The proposed device provides a reduction in the consumption of carbon dioxide and the time of refrigeration processing of poultry. The design of the device allows you to integrate into existing traditional processing lines for poultry processing.

Information sources

1. US patent 3708995, F25d 13/06, 1973.

2. The patent of Germany 2608815 A1, F25D 3/10, publ. 09/16/1976.

3. RF patent No. 2320181. - Publ. 03/27/2008. Bull. No. 9.

Claims (1)

A device for refrigerating processing poultry carcasses with carbon dioxide, consisting of an insulated casing, conveyor, device for supplying CO ₂ directly to the product, characterized in that for the complex processing of the product with a refrigerant - CO ₂ it has a number of nozzles connected to the pipeline for supplying carbon dioxide gas , and fans installed in the upper part of the apparatus to create an intensive circulation of the air-gas medium, which allows to reduce the flow of refrigerant and increase the intensity of loobmena.

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