SU1701167A1 - Device for storage of perishable food-stuffs - Google Patents

Abstract

This invention relates to refrigerated storage of products under conditions of low oxygen content. The purpose of the invention is to reduce energy costs. The device contains a refrigerating chamber 1, a main 2 and an additional 3 membrane gas separation devices, fans 4, a vacuum pump 5 and pipelines 6 connecting the supramembrane cavity 7 of the main apparatus 2 with the chamber 1, the submembrane cavity 8 of the additional apparatus 3 - with a vacuum pump 5, as well as additional 3 and main 2 devices through fan 4 among themselves, with chamber 1 and with atmosphere. Submembrane cavity 9 of main apparatus 2 by pipe 6 through fan 4 is connected in a closed loop to the inlet of supramembrane cavity 10 of an additional apparatus 3. Shut-off valves 11, 12, 13 and 14 are installed on pipelines 6. the cavity 9 of the main apparatus 2 receives air enriched with nitrogen, reduces the flow of oxygen into chamber I and reduces the excretion of nitrogen from the chamber. 1 tab., 1 Il. SS (L

Description

The invention relates to refrigerated storage of products under conditions of low oxygen content.

The purpose of the invention is to reduce energy consumption.

The drawing shows a device for storing perishable products in a controlled gaseous environment.

The device contains a refrigerating chamber 1, a main 2 and an additional 3 membrane gas separation devices, fans 4, a vacuum pump 5 and pipelines 6 connecting the supramembrane cavity 7 of the main apparatus 2 with the chamber 1, the submembrane cavity 8 of the additional apparatus 3 - with a vacuum pump 5, as well as an additional 3 and main 2 devices through the fan 4 between them, with the camera 1 1 with the atmosphere.

The submembrane cavity 9 of the main apparatus 2 at the inlet is connected to the outlet

from the submembrane cavity 10 of the additional apparatus 3, and the output of the submembrane cavity 9 of the main apparatus 2 by pipe 6 through the fan 4 is connected in a closed circuit to the input of the submembrane cavity 10 of the additional apparatus 3. On the pipelines 6 the shut-off valves 11, 12, 13 and.

The device works as follows.

After loading the fruits in the refrigerating chamber 1 create a gas environment with low oxygen content. To do this, turn on the vacuum pump 5, the fans 4 and open the valve 13. The gas medium of the chamber 1 circulates through the supermembrane cavity 7 of the main membrane gas separation apparatus 2. At the same time, the gas medium is circulated through the closed circuit between the submembrane cavity of the main apparatus and the supermembrane J

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10 additional space is i a 3.

The flow rate of the circulating gas medium through the apparatus 2 and 3 is regulated by a valve 13

When products are stored in chamber 1, the composition of the medium is maintained according to the content of nitrogen and oxygen in it, and carbon dioxide emitted from it during storage is withdrawn from it.

In the process of circulating gas streams, the concentration of nitrogen in the gas coming from the supramembrane cavity 10 of the additional apparatus 3 to the submembrane cavity 9 of the main apparatus 2 is changed. 1 oxygen and carbon dioxide and nitrogen is introduced into the gas mixture circulating in the supermembrane cavity 7 of the apparatus 2. A constant amount of the gas mixture in chamber 1 is maintained by valve 1 1. Through valve 14, the gas mixture of a given composition is fed into parallel but connected cold rooms.

In order to create an increased concentration of nitrogen in the kazovo mixture, the circulating stream from the submembrane cavity 9 of the main apparatus 2 is fed through the valve 12 directly into the supermembrane cavity 10 of the additional apparatus 3.

The flow into the submembrane cavity 9 of the main apparatus 2 enriched with nitrogen reduces the flow of oxygen into chamber 1 and reduces the excretion of nitrogen from the chamber due to a decrease in the difference in their partial pressures on both sides of the membrane in the apparatus.

This reduces the selectivity requirements of the membrane and keeps the concentration of oxygen and carbon dioxide at a lower level.

The table shows data on the dependence of the required selectivity of the membrane for CO2 / O2 on the concentration of nitrogen supplied to the main unit, and on the composition of the gaseous medium in the chamber.

The device allows the chamber to regulate and maintain a given reduced oxygen concentration of less than 2%.

This makes it possible to reduce the losses of fruits arising from microbiological and physiological diseases, as compared with the known device in the period of formation and maintenance of a given composition of the gaseous medium in refrigerators.

Claims (1)

Invention Formula A device for storing perishable products in a controlled gaseous environment, containing a sealed refrigerating chamber, primary and secondary membrane gas separation devices, the fan, the vacuum pump and the piping connecting the supermembrane cavity of the main apparatus with the chamber, the submembrane cavity of the additional apparatus with the vacuum pump, as well as the supplementary and main apparatus through the fan between themselves, with the chamber and with the atmosphere characterized in that In order to reduce energy consumption, the submembrane cavity of the main apparatus at the inlet is connected to the exit from the supramembrane cavity of an additional 5 of the apparatus, and the output of the submembrane cavity of the main apparatus by pipeline through the fan in a closed circuit - with the entrance of the supramembrane cavity of the additional apparatus. 111 2 7 & -four -five tt -Os} - .-5 L-4 F  four