SU861886A1 - Method of producing ejector-type refrigeration machine - Google Patents

Description

I

The invention relates to refrigeration engineering, in particular to a method for obtaining low temperatures.

A method of obtaining cold in an ejector cooling mat is known by evaporating the refrigerant when the coolant is supplied from an external source, ejection of liquid refrigerant vapor formed, followed by condensing the mixture and separating the refrigerant with one part to evaporate, and the second to eject 11.

The disadvantage of this method is the relatively low efficiency in obtaining low-temperature cold.

The purpose of the invention is to increase the efficiency in obtaining low-temperature cold.

This is achieved by the fact that the process of obtaining cold is carried out in several cascades, and that is, it is more intense when the mixture condenses.

interstitial cascade, used to preheat the second part of the refrigerant i supplied to the ejection in the previous cascade and to evaporate the liquid refrigerant in the subsequent cascade.

The drawing shows a diagram of the refrigeration machine in which this method can be implemented.

The machine contains a generator 1, connected to an ejector 2 connected through a control valve 3 with an evaporator 4 and a condenser 5, which is connected through 6 to a generator 1. A generator 7 is connected to an ejector

IS 8, connected through a control valve 9 with an evaporator 10 and a condenser 11, which through pump 12 is connected to a generator 7. A generator 13 is connected to an ejector 14 connected

Claims (1)

20 through a control valve 15 with an isp, a vaporizer 16 and a condenser 17, which is connected via pump 18 to generator 13. The evaporator 4, condenser 11 and generator 13 are combined into one unit. The refrigerant of the upper cascade due to the heat of the external source evaporates in the generator 1 and is directed to the ejector 2, where the working steam expands, sucks the refrigerant vapor from the evaporator 4. Next, the vapor mixture is injected into the condenser 5, where they are condensed, giving part heat to the refrigerant of the middle cascade, which enters generator 7, and the second part is taken away from the surrounding medium. After condenser 5, the liquid refrigerant is divided into two streams: the first stream is choked in the regulating valve 3 and directed to the evaporator 4, the second stream by the freon pump 6 is fed to the generator 1 The medium stage refrigerant is evaporated in the generator of the upper stage refrigerant in the generator 7 , after which the working steam enters the ejector 8 and the mixture of vapors — working and injected — is pushed into the condenser 11. In the condenser 1I, the refrigerant releases heat of condensation to the refrigerant of the upper stage in the evaporator 4 and the refrigerant There is a cascade in generator 13. Condenser 11, evaporator 4 and generator 13 are interrupted into one unit. After condenser 11, the liquid is divided into two streams: the first flow, throttled in control valve 9, enters the evaporator 10, the second flow is freon pump 12 is supplied to the Generator 7. The lower cascade unit, for counting part of the heat of condensation of the coolant of the middle cascade, is evaporated in the generator 13 and the ejector 14, the mixture of working and injected vapors, compressed to condensing pressure, is injected into the lower stage condenser 17. The condensation of the lower stage refrigerant is perceived by the refrigerant in the middle cascade in the evaporator 10. Part of the liquid after condenser 17, throttled in the control valve 15, is directed to the evaporator 16, where it evaporates, takes heat from the cooled object. The second part of the liquid refrigerant by the freon pump 18 is supplied to the generator 13. The preloaded method of operation of the cold cascade allows the use of heat-using refrigerating machines as cascades, which leads to a number of technical and economic advantages compared to the known method of operating the cascade refrigerating machine, for example the possibility of obtaining low temperatures without the cost of electricity and a lower cost of 1 kWh of cold. Claims The method of obtaining cold in an ejector chiller by evaporating refrigerant when supplying coolant from an external source, ejecting the formed liquid refrigerant vapors followed by condensing the mixture and separating the refrigerant with one part to evaporate, and the second to eject, characterized by in order to increase the cost-effectiveness in obtaining low-temperature cold, the process of obtaining cold is carried out in several cascades, and the heat generated during condensation with The intermediate tank mixes are used to preheat the second part of the refrigerant supplied to the ejection in the previous cascade and to evaporate the liquid refrigerant in the subsequent cascade. Sources of information taken into account in the examination. 1. USSR author's certificate No. 675282, cl. F 25 B 1/06, 1977.