SU1545046A1 - Apparatus for cooling and freezing foodstuffs - Google Patents

Abstract

The invention relates to refrigeration and cryogenic engineering, namely to refrigerators with additional cooling of the coolant using liquid nitrogen. The aim of the invention is to increase the intensification of the cooling process and increase the reliability of the device in operation. The flow of liquid nitrogen through the regulating valve 9 is supplied to the bubbler 2 installed in the section of the inlet refrigerant 6 between the evaporator 5 and the tank 1, and through the regulating valve 10 to the bubbler 3 in the spiral-shaped section 7 of the inlet refrigerant 6. The holes for the output of the coolant in the latter are placed coaxially with the nitrogen outlets from the bubbler 3. Thus, the cooling medium is additionally intensively cooled in the tank 1. 2 Il.

Description

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The invention relates to refrigeration and cryogenic engineering, namely to refrigerators with additional refrigerant coolant using liquid nitrogen.

The purpose of the invention is to intensify the cooling process and increase the reliability of the device in operation,

Figure 1 shows a diagram of the proposed device; figure 2 - section aa in figure 1.

The device for cooling and freezing products contains a thermally insulated container 1 for the product and coolant, a cooling system for the coolant with liquid nitrogen with two bubblers 2 and 3, a horizontal perforated plate 4 installed in the lower suit capacity 1, and a refrigeration unit with an evaporator 5. At the same time, the capacity I for the coolant is communicated to the supply 6 and the discharge 7 cooling lines with the evaporator 5 of the refrigeration unit. The inlet cold pipeline 6 has a current of 7, made in the form of a spiral and placed between the bottom and the perforated plate A.

Bubbler 2 is installed in the area of the inlet refrigerant line 6 between the evaporator 5 and the tank 1, and the bubbler 3 is installed in the spiral-shaped section 7 of the inlet refrigerant line 6. The holes 8 for the output of the coolant are placed coaxially with the holes for nitrogen inlet from the bubbler 3. The devices have pipelines for supplying liquid nitrogen to bubblers 2 and 3, respectively, with control valves 9 and 10, a tank 11 with liquid nitrogen, a branch 12 and an evaporator 13.

The device works as follows.

The refrigeration unit cools the coolant, for example an aqueous solution of NaCl or CaC12, which in the tank 1 cools and freezes the products immersed in it. To remove the peak load when the warm product is loaded, to increase the intensity of the cooling process, a coolant cooling system with liquid nitrogen is used.

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The flow of liquid nitrogen through the control valve 9 is fed to the bubbler 2 and through the control valve 10 to the bubbler 3. Additional input of nitrogen through the bubblers 2 and 3 allows the required cooling of the coolant in the tank 1. The intensity of the cooling process is controlled by changing the flow rate of liquid nitrogen supplied from tank 11 to bubblers 2 and 3.

The installation of the bubbler 2 in the inlet cooling pipe b, and the bubbler 3 in the spiral-shaped section 7 increases the coolant flow rate and leads to additional turbulence, which ensures the disruption of solid particles in the form of NaCl or CaC1.2 crystals from the surface of the bubblers 2 and 3, improves the mixing of bubbling nitrogen with coolant, and thereby intensifies the cooling process and increases the reliability of the device in operation.

Claims (1)

Invention Formula A device for cooling and freezing products, containing a thermally insulated container for the product and coolant, cooling system for the coolant with liquid nitrogen with two bubblers, characterized in that, in order to intensify the cooling process and increase reliability in operation, the device is equipped with a horizontal perforated plate installed in the lower part capacity, and the refrigeration unit, while the capacity for the coolant is communicated by the inlet and outlet refrigerant lines with the evaporator of the refrigeration unit, moreover, the inlet refrigerant has a section made in the form of a spiral and placed between the bottom and the perforated plate, one bubbler is installed on the section of the inlet refrigerant pipe so that the openings for the outlet of the coolant in the latter are coaxial with the openings for nitrogen to escape from the bubbler. Compiled by V. Konstantinov Editor A. Kozoriz Tehred M. Khodanych Proofreader N. Korol Order 483 Circulation Y8 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab., T./5 Production and Publishing Combine Patent, Uzhgorod, Gagarin st., 101 FIG. 2 Subscription