SU1191699A2 - Container for transportation of perishable foodstuff - Google Patents

Abstract

CONTAINER FOR TRANSPORTATION OF SPORISHING FOOD PRODUCTS by bus. St. 823191, characterized in that, in order to improve the quality of frozen products, it is equipped with a device for spraying liquefied gas, containing a manifold connected to the supply system of liquefied coolant gas through a control valve, connected to the collector vertical tubes. horizontal gaps between the branches of the branches of the trays, the flow cross section of which increases as they move away from the collector.

Description

Ch15F1K .1

L

cl

with

The invention relates to refrigeration equipment, namely, containers for the transport of perishable foodstuffs. The purpose of the invention is to increase the quality of frozen foods. FIG. 1 schematically shows the proposed container, the general view; in fig. 2 shows section A-A in FIG. 1. Container for transportation of perishable foodstuffs contains a heat-insulated body 1 with a door 2, a heat-insulated partition 3 fixed in the body 1 to form a horizontal channel 4 in which the fan 5 is placed, gratings 6 and a spray nozzle 7. In the body 1 is fixed a partition 8 with guide plates 9 and rows of slots 10 that coincide with horizontal gaps between the trays 11 that are regularly located and mounted on the trolley 12. In the communication zone of channels 4 and 13 a temperature sensor 14 is located, connected signal-conducting means with a temperature setting device 15 and a pulsed link in the control circuit of the solenoid valve 16 installed in the refrigerant supply pipe 17 from the vessel 18 to the nozzle 7. The trolley 12 consists of a platform 19 and vertical fences on four sides surrounding the package trays 11 having a mesh bottom. The side fence 20 and one of the end guards 21 are rigidly attached to the platform 19, the other front fence 22 is hinged on the side fence 20, and the side fence 23 is made removable and connected to the barriers 21 and 22 by means of hooks 24. Such a design of the trolley 12 allows you to remove trays 11 with the product to the platform 19 on the platform 19 when removing the fence 23 and folding the fence 22 without obstacles. Removable fence 23 is equipped with an additional device for spraying liquefied gas containing a ring torus 25 connected via a quick-detachable connector 26 to the refrigerant supply pipe 27 from vessel 18. Vertical tubes 28 connected to manifold 25, connected to branches 29 placed in horizontal gaps between the troughs of trays 11, and the flow area of branches 29 increases as they a distance from the collector 25. In the pipe 27, a control valve 30 is installed connected to a temperature sensor in contact with the product to be frozen. The vessel 18 for the refrigerant is equipped with filling and discharge pipelines 31 and 32, respectively. Pipeline 32 gas release communicated with the nozzle 7 through the pipe 33. The door of the freezer is equipped with a safety valve 34. The proposed container works as follows. Through conduit 31, vessel 18 is filled with liquefied gas, such as liquid nitrogen. The resulting nitrogen vapor is released into the atmosphere through conduit 32 or through conduit 33 into the container, pre-cooling it. After the cart 12 with side guards 20-23 loaded with the trays 11 with the product to be frozen is installed in the container and the additional liquefied gas atomizer mounted on it is connected to the pipeline 27 into the air flow created by the fan 5, liquid refrigerant is injected through the nozzle 7, which evaporates and moves intensively in the stream. The temperature of the gas stream during the cooling of the product before the pre-cocroscopic point is set by the sensor 14, which controls the operation of the solenoid valve 16 by means of the temperature setter 15, controlling the amount of refrigerant entering the nozzle. The resulting cooling gas flow enters the vertical channel 13 and is guided by the flaps 9 through the slots 10 into the gaps between the trays 11, blowing them from the top and bottom, cools the product, then along the door 2 is fed into the horizontal channel 4 for further cooling. The pressure in the container is automatically maintained by the valve 34, the opening of which occurs at a pressure of 2-10 Pa, since the water-holding capacity of the tissues of products of both vegetable and animal origin increases with increasing pressure of the cooling gas, and the freezing rate of the products is intensified, resulting in small ice crystals. When the product reaches its near-cryoscopic temperature, the control valve 30 opens and a manifold 25 enters the manifold 25, and then refrigerant flows into the tubes 28 and 29. In this case, the pre-cooled product is vented by a coolant, for example liquid nitrogen. When the temperature of the product drops below the cryoscopic phase transition in the product is completed, the control valve 30 closes and further cooling of the product to the optimum temperature of the storage occurs due to the flow of the cooling gas through it.

The proposed container allows obtaining a wide range of frozen products with high quality and thereby reducing the quantitative and qualitative product losses after defrosting.

29

25

FIG ..

Claims (1)

CONTAINER FOR TRANSPORT OF PERISHABLE FOOD PRO DUKTOV by author St. No. 823191, characterized in that, in order to improve the quality of frozen products, it is equipped with a device for spraying liquefied gas containing a manifold connected to a system for supplying liquefied cooling gas through a control valve, vertical tubes connected to the collector in communication with horizontal gaps between tiers of trays branches, the bore of which increases as they move away from the collector. with SO with ί