CN217876522U - Double-machine double-stage compression refrigeration system of coupling ejector - Google Patents

Abstract

The utility model relates to a double-machine double-stage compression refrigeration system of a coupling ejector, wherein the outlet of a first gas-liquid separator is connected with a first compressor, the outlet of the first compressor is connected with a first condenser, the outlet of the first condenser is connected with a first heat regenerator, the heat flow side outlet of the first heat regenerator is connected with a second heat regenerator, and the heat flow side outlet of the second heat regenerator is connected with the ejector; the outlet of the ejector is connected with the separation tank; an e port of the separation tank is connected with a cold flow side of the first heat regenerator, and a cold flow side outlet of the first heat regenerator is connected with an inlet of the first gas-liquid separator; the g port is connected with a cold flow side inlet of the second regenerator, and a cold flow side outlet of the second regenerator is connected with a b port of the ejector; the refrigerating system enables refrigerants in different states flowing out of the separating tank to provide a basis for continuous refrigeration circulation, so that the refrigerating capacity of the whole refrigerating system is improved, and a feasible direction is provided for efficient refrigeration jointly by combining the double compressors and the ejector.

Description

Double-machine double-stage compression refrigeration system of coupling ejector

Technical Field

The utility model relates to a refrigeration technology field, concretely relates to duplex class doublestage compression refrigerating system of coupling sprayer.

Background

The commonly used refrigeration technology is a method for generating temperature reduction by changing the physical state (phase state change) of a working medium, and besides being widely used in industry, the refrigeration technology also enters the daily life of people.

The ejector has the advantages of special structure, no moving part, long service life and the like, and is gradually an indispensable part in a refrigeration system; in a traditional refrigeration system, traditional components such as a compressor, an evaporator, a condenser, a throttling device and the like are often adopted for refrigeration, and with the continuous development of science and technology, the combination of an ejector and the compressor for common refrigeration becomes a new refrigeration mode, however, how to combine the ejector and the compressor together to fully play respective functions and efficiently obtain cold is always a key point of research in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a double-machine class doublestage compression refrigerating system of coupling sprayer provides a feasible direction with common high-efficient refrigeration for how compressor and sprayer inter combination.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a double-machine double-stage compression refrigeration system of a coupling ejector comprises a first gas-liquid separator, a first compressor, a first condenser, a first heat regenerator, a second heat regenerator, an ejector, a separation tank, a first evaporator, a third heat regenerator, a second gas-liquid separator, a second compressor, a second condenser and a second evaporator; the outlet of the first gas-liquid separator is connected with the inlet of the first compressor, the outlet of the first compressor is connected with the inlet of the first condenser, the outlet of the first condenser is connected with the hot-flow-side inlet of the first regenerator, the hot-flow-side outlet of the first regenerator is connected with the hot-flow-side inlet of the second regenerator, and the hot-flow-side outlet of the second regenerator is connected with the port a of the ejector; the outlet of the ejector is connected with the d port of the separation tank;

the outlet of the separation tank is divided into an e port, an f port and a g port; the e port is connected with a cold flow side inlet of the first heat regenerator, and a cold flow side outlet of the first heat regenerator is connected with an inlet of the first gas-liquid separator; the f port is connected with an inlet of the first evaporator, an outlet of the first evaporator is connected with a cold flow side inlet of the third regenerator, a cold flow side outlet of the third regenerator is connected with an inlet of the second gas-liquid separator, an outlet of the second gas-liquid separator is connected with an inlet of the second compressor, an outlet of the second compressor is connected with an inlet of the second condenser, an outlet of the second condenser is communicated with a hot flow side inlet of the third regenerator, a hot flow side outlet of the third regenerator is connected with an inlet of the first throttle valve, an outlet of the first throttle valve is connected with an inlet of the second evaporator, and an outlet of the second evaporator is connected with the b port of the ejector; and the g port is connected with an inlet of the second throttling valve, an outlet of the second throttling valve is connected with a cold flow side inlet of the second regenerator, and a cold flow side outlet of the second regenerator is connected with the b port of the ejector.

The utility model has the advantages that:

in the refrigeration system, the supercooling degree of a refrigerant from a first compressor is increased in a first regenerator and a second regenerator for two degrees, the refrigerant enters an ejector and then enters a knockout drum, and the refrigerant flowing out of an e port in the knockout drum directly participates in heat exchange of the first regenerator to ensure the first heat exchange effect of a main path refrigerant; the refrigerant flowing out of the f port in the separating tank firstly dissipates cold in the first evaporator to realize primary refrigeration, and then passes through the second compressor, and a third heat regenerator arranged on a branch path where the refrigerant flowing out of the f port is located exchanges heat between the refrigerant passing through the second compressor and the refrigerant not passing through the second compressor to ensure the subsequent cold dissipation effect in the second evaporator; the refrigerant flowing out of the port g directly participates in the heat exchange work of the second heat regenerator, enters from a port b of the ejector after mutually converging the refrigerant which passes through the second heat regenerator and is subjected to cold dissipation from the second evaporator and participates in the circulation again, and the whole refrigeration system performs three-time heat exchange and secondary refrigeration; and the connection relation among the first compressor, the second compressor, the first heat regenerator, the second heat regenerator, the third heat regenerator and the ejector is reasonably arranged, so that refrigerants in different states flowing out of the e port, the f port and the g port in the separation tank can exert the characteristics of the refrigerants, a foundation is provided for continuous circulation of refrigeration, the refrigerating capacity of the whole refrigerating system is improved, and a feasible direction is provided for the joint high-efficiency refrigeration of the compressor and the ejector.

Drawings

Fig. 1 is a schematic view of the structure principle of the utility model.

Names corresponding to the marks in the figure:

1. the system comprises a first gas-liquid separator, 2, a first compressor, 3, a first condenser, 4, a first regenerator, 5, a second regenerator, 6, an ejector, 7, a separation tank, 8, a first evaporator, 9, a third regenerator, 10, a second gas-liquid separator, 11, a second compressor, 12, a second condenser, 13, a second evaporator, 14, a first throttle valve, 15 and a second throttle valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

The embodiment of the utility model provides a:

as shown in fig. 1, a dual-class dual-stage compression refrigeration system of a coupled ejector includes a first gas-liquid separator 1, a first compressor 2, a first condenser 3, a first regenerator 4, a second regenerator 5, an ejector 6, a separation tank 7, a first evaporator 8, a third regenerator 9, a second gas-liquid separator 10, a second compressor 11, a second condenser 12, a second evaporator 13, a first throttle valve 14, and a second throttle valve 15.

An outlet of the first gas-liquid separator 1 is connected with an inlet of a first compressor 2, an outlet of the first compressor 2 is connected with an inlet of a first condenser 3, an outlet of the first condenser 3 is connected with a hot flow side inlet of a first regenerator 4, a hot flow side outlet of the first regenerator 4 is connected with a hot flow side inlet of a second regenerator 5, and a hot flow side outlet of the second regenerator 5 is connected with an a port of an ejector 6; the port c of the ejector 6 is connected to the port d of the separation tank 7.

The outlet of the separating tank 7 is divided into an e port, an f port and a g port; the port e is connected with a cold flow side inlet of the first heat regenerator 4, and a cold flow side outlet of the first heat regenerator 4 is connected with an inlet of the first gas-liquid separator 1; the f port is connected with an inlet of the first evaporator 8, an outlet of the first evaporator 8 is connected with a cold flow side inlet of the third regenerator 9, a cold flow side outlet of the third regenerator 9 is connected with an inlet of the second gas-liquid separator 10, an outlet of the second gas-liquid separator 10 is connected with an inlet of the second compressor 11, an outlet of the second compressor 11 is connected with an inlet of the second condenser 12, an outlet of the second condenser 12 is communicated with a hot flow side inlet of the third regenerator 9, a hot flow side outlet of the third regenerator 9 is connected with an inlet of the first throttle valve 14, an outlet of the first throttle valve 14 is connected with an inlet of the second evaporator 13, and an outlet of the second evaporator 13 is connected with the b port of the ejector 6; the g port is connected with an inlet of a second throttle valve 15, an outlet of the second throttle valve 15 is connected with a cold flow side inlet of a second regenerator 5, and a cold flow side outlet of the second regenerator 5 is connected with a b port of the ejector 6.

The working principle is as follows:

the high-temperature and high-pressure gas refrigerant discharged from the first compressor 2 first passes through the first condenser 3, and is cooled to be in a liquid state in the first condenser 3; the liquid refrigerant discharged from the first condenser 3 is marked as a main refrigerant, the main refrigerant enters from a hot flow side inlet of the first heat regenerator 4 and then flows out from a hot flow side outlet of the first heat regenerator 4, and meanwhile, the heat exchange operation is completed in the first heat regenerator 4, so that the temperature of the first heat regenerator is reduced, and the supercooling degree is improved; the main refrigerant discharged from the hot flow side outlet of the first regenerator 4 enters the second regenerator 5 from the hot flow side inlet of the second regenerator 5 to further increase the supercooling degree in the second regenerator 5, and is discharged from the hot flow side outlet of the second regenerator 5 after heat exchange is completed, the subsequent main refrigerant enters the ejector 6 from the port a of the ejector 6 and is ejected from the port c of the ejector 6, the ejected main refrigerant enters the knockout drum 7, the main refrigerant entering the knockout drum 7 is discharged from the port e, the port f and the port g in different forms, for convenience of description, the discharged main refrigerant corresponding to the port e, the port f and the port g are respectively marked as a first sub refrigerant, a second sub refrigerant and a first sub refrigerant, wherein the first sub refrigerant is in a gaseous state, enters the first regenerator 4 from the hot flow side inlet through a pipeline, and is discharged from the cold flow side outlet of the first regenerator 4, and is discharged from the first sub-refrigerant separator 4, and the first sub-refrigerant completes the heat exchange cycle from the first gas-liquid separator 4 through the first gas-liquid separator 1; the second split refrigerant is in a liquid state, enters the first evaporator 8 through a pipeline, is subjected to cooling dissipation therein, then enters the third regenerator 9 from a cold flow side inlet, is discharged from a cold flow side outlet and enters the second compressor 11 through the second gas-liquid separator 10, and the second split refrigerant discharged from the second compressor 11 enters the third regenerator 9 from a hot flow side inlet of the third regenerator 9 after being condensed by the second condenser 12; in the third heat regenerator 9, the temperature of the second split refrigerant passing through the cold flow side channel is raised, the degree of superheat is improved, the risk of liquid slugging of the second compressor 11 is reduced, while the temperature of the second split refrigerant passing through the hot flow side channel is reduced, the degree of supercooling of the second split refrigerant is increased, and the efficiency of the system is improved; then enters the second evaporator 13 through the first throttle valve 14, is cooled down in the second evaporator 13, is finally discharged from the second evaporator 13, enters from the port b of the ejector 6 and completes the cycle; the third split-flow refrigerant is in a liquid state, is discharged from a g port of the separation tank 7, is throttled and depressurized by the second throttle valve 15, is changed into a low-temperature and low-pressure gas-liquid two-phase state, enters from a cold-flow-side inlet of the second regenerator 5, is discharged from a cold-flow-side outlet of the second regenerator 5, and completes heat exchange with the main-path refrigerant in the second regenerator 5; and finally flows into the ejector 6 together with the second divided refrigerant discharged from the second evaporator 13 in confluence, completing the cycle.

Claims (1)

1. The utility model provides a duplex class doublestage compression refrigerating system of coupling ejector which characterized in that: the system comprises a first gas-liquid separator, a first compressor, a first condenser, a first heat regenerator, a second heat regenerator, an ejector, a separating tank, a first evaporator, a third heat regenerator, a second gas-liquid separator, a second compressor, a second condenser, a second evaporator, a first throttle valve and a second throttle valve;

an outlet of the first gas-liquid separator is connected with an inlet of the first compressor, an outlet of the first compressor is connected with an inlet of the first condenser, an outlet of the first condenser is connected with a hot flow side inlet of the first regenerator, a hot flow side outlet of the first regenerator is connected with a hot flow side inlet of the second regenerator, and a hot flow side outlet of the second regenerator is connected with an a port of the ejector;

the port c of the ejector is connected with the port d of the separation tank;

the outlet of the separation tank is divided into an e port, an f port and a g port; the e port is connected with a cold flow side inlet of the first heat regenerator, and a cold flow side outlet of the first heat regenerator is connected with an inlet of the first gas-liquid separator; the f port is connected with an inlet of the first evaporator, an outlet of the first evaporator is connected with a cold flow side inlet of the third regenerator, a cold flow side outlet of the third regenerator is connected with an inlet of the second gas-liquid separator, an outlet of the second gas-liquid separator is connected with an inlet of the second compressor, an outlet of the second compressor is connected with an inlet of the second condenser, an outlet of the second condenser is connected with a hot flow side inlet of the third regenerator, a hot flow side outlet of the third regenerator is connected with an inlet of the first throttle valve, an outlet of the first throttle valve is connected with an inlet of the second evaporator, and an outlet of the second evaporator is connected with the b port of the ejector; and the g port is connected with an inlet of the second throttle valve, an outlet of the second throttle valve is connected with a cold flow side inlet of the second regenerator, and a cold flow side outlet of the second regenerator is connected with the b port of the ejector.

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