CN113883741B - Absorption refrigeration system - Google Patents

Absorption refrigeration system Download PDF

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Publication number
CN113883741B
CN113883741B CN202111199267.4A CN202111199267A CN113883741B CN 113883741 B CN113883741 B CN 113883741B CN 202111199267 A CN202111199267 A CN 202111199267A CN 113883741 B CN113883741 B CN 113883741B
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solution
heat insulation
generator
jet type
absorption
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CN113883741A (en
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盛凯
石靖峰
陈见兴
矫晓龙
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Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
    • F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
    • F25B49/043—Operating continuously
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

The invention discloses an absorption refrigeration system, which comprises a generator, a condenser, a throttling component, an evaporator, a first jet type heat insulation absorber, a second jet type heat insulation absorber, a cooler, an exchanger, a first solution pump and a second solution pump; the generator is also connected with a heat collector, working fluid in the generator is heated and boiled by the heat collector and then is conveyed into the generator, the expansion work of the high-temperature and high-pressure solution is recovered by utilizing a heat insulation absorption refrigeration mode of the double ejectors, the heat transfer medium in the absorption process is reinforced in a segmented mode, the absorption pressure is increased, the solution absorption effect is enhanced, the stepped segmented absorption of the concentrated solution is realized, and the purposes of saving high-grade electric energy, reducing the volume of a unit, improving the refrigeration efficiency and expanding the applicable temperature range of the air-cooled absorption refrigeration cycle are achieved; the generator is externally connected with the heat collector, and absorbs and utilizes solar energy, factory waste heat energy or underground water source heat energy absorbed by the heat collector, so that the energy utilization rate is effectively improved, and sustainable development is facilitated.

Description

Absorption refrigeration system
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an absorption refrigeration system.
Background
A refrigeration system refers to any system that uses external energy to transfer heat from a substance or environment at a low temperature to a substance or environment at a higher temperature. Generally undergo four processes of compression, condensation, expansion and evaporation to form the most basic configuration depending on the refrigeration cycle, and can be classified into a compression refrigeration system, an absorption refrigeration system, a vapor-injection refrigeration system and the like according to the form of a device.
The absorption refrigeration is a refrigeration technology which uses heat energy consumption, relies on liquid refrigerant to vaporize and absorb heat in an evaporator to force the heat to be continuously transmitted by low temperature Xiang Gaowen, is one of common refrigeration methods, adopts binary solution composed of two substances with different boiling points and mutually soluble as working medium (the high boiling point is used as absorbent and the low boiling point is used as refrigerant), and utilizes the characteristic that the saturated concentration of the solution changes with temperature and pressure to perform refrigeration cycle.
Compared with compression refrigeration technology, absorption refrigeration technology has the advantages of low consumption of mechanical energy, direct refrigeration by using heat energy, less moving parts, low noise and the like, and meanwhile, liBr/H is commonly used 2 0 or H 2 The salt solution such as O is used as working medium, is energy-saving and environment-friendly, and is one of better refrigeration modes for replacing the electric compression refrigeration technology.
The absorption refrigerator is divided into a water cooling mode and an air cooling mode from a cooling mode, the COP of the water cooling type absorption refrigerator is higher than that of the air cooling type absorption refrigerator, however, the air cooling type absorption refrigerator has the advantages of cleanness, environment friendliness, safety, sanitation, water resource conservation, convenience in installation, wide application range and the like, but the existing air cooling type single-effect absorption type circulation has the problems of higher occurrence temperature, overlarge solution circulation rate, smaller refrigeration temperature area and overlarge unit volume in the working process, so that the absorption type refrigerant has insufficient utilization rate of energy sources in the specific working process, and heat loss exists.
Patent document CN103423912 a discloses a small air-cooled absorption refrigerator, which comprises a generator, an air-cooled condenser, a throttle valve, an evaporator, an absorber, a first solution pump, an air-cooled precooler, a mixer, a solution heat exchanger and a flow divider, and is characterized in that a non-adiabatic absorber, an air-cooled precooler and a flow divider are adopted, so that the refrigerating performance of the system is improved; but the heat and mass transfer area required by the system is increased, the volume is increased, and the refrigeration performance and the temperature adaptation area of the system are still to be improved.
Disclosure of Invention
The invention aims to provide an absorption refrigeration system, which solves the problems of higher generation temperature, overlarge solution circulation multiplying power, overlarge system refrigeration efficiency and the like in the working process of the existing air-cooled single-effect absorption circulation in the prior art.
In order to achieve the aim of the invention, the invention is realized by adopting the following technical scheme:
an absorption refrigeration system, comprising:
the device comprises a generator, a condenser, a throttling component, an evaporator, a first jet type heat insulation absorber, a second jet type heat insulation absorber, a cooler, a solution heat exchanger, a first solution pump and a second solution pump;
the solution outlet of the generator is connected with the working fluid inlet of the first jet type heat insulation absorber, the outlet of the first jet type heat insulation absorber is connected with the inlet of the second solution pump, the outlet of the second solution pump is connected with the inlet of the cooler, the outlet of the cooler is connected with the working fluid inlet of the second jet type heat insulation absorber, the outlet of the second jet type heat insulation absorber is divided into two paths, one path is connected with the solution inlet of the generator through the second solution pump, and the other path is connected with the inlet of the second solution pump together with the outlet of the first jet type heat insulation absorber;
the steam outlet of the generator is respectively connected with the steam inlet of the first jet type heat insulation absorber and the steam inlet of the second jet type heat insulation absorber after passing through the condenser, the throttling component and the evaporator.
In some embodiments of the present application, a regulating valve is provided in series on the line between the outlet of the second ejector and the inlet of the second solution pump.
In some embodiments of the present application, the generator is further formed with a circulating water outlet and a circulating water inlet, the circulating water is output from the circulating water outlet, enters the heat collector through the circulating water pump, and is transported back to the generator from the circulating water inlet after being heated and boiled by the heat collector.
In some embodiments of the present application, the working fluid line between the solution outlet of the generator and the working fluid inlet of the first ejector heat-insulating absorber exchanges heat with the working fluid line between the outlet of the first solution pump and the solution inlet of the generator through a solution heat exchanger.
In some embodiments of the present application, the first ejector heat-insulating absorber and the second ejector heat-insulating absorber each comprise a mixing absorption chamber, a constant pressure absorption chamber, and a diffusion absorption chamber.
In some embodiments of the present application, the throttling component is a thermal expansion valve, a capillary valve, or an electronic expansion valve.
In some embodiments of the present application, the energy of the heat collector is derived from one or more of solar energy, plant waste heat energy, and groundwater source heat energy.
In some embodiments of the present application, the solution heat exchanger is a plate heat exchanger, a double pipe heat exchanger, or a shell and tube heat exchanger.
In some embodiments of the present application, the evaporator is a plate heat exchanger, a double tube heat exchanger, or a shell and tube heat exchanger.
In some embodiments of the present application, the condenser is an air-cooled condenser, the cooler is an air-cooled cooler, and both the condenser and the cooler are fin heat exchangers.
Compared with the prior art, the invention has the advantages and positive effects that:
the absorption refrigeration system is provided with a first jet type heat insulation absorber and a second jet type heat insulation absorber, the expansion work of high-temperature and high-pressure solution is recovered by utilizing a heat insulation absorption refrigeration mode of double jet type ejectors, the heat transfer medium in the absorption process is reinforced in sections, the absorption pressure is increased, the solution absorption effect is enhanced, and the stepped section absorption of concentrated solution is realized.
The generator is externally connected with the heat collector, and absorbs and utilizes solar energy, factory waste heat energy or underground water source heat energy absorbed by the heat collector, so that the energy utilization rate is effectively improved, and sustainable development is facilitated.
Other features and advantages of the present invention will become apparent upon review of the detailed description of the invention in conjunction with the drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structural principle of one embodiment of an absorption refrigeration system according to the present invention;
FIG. 2 is a schematic diagram of a first or second ejector heat insulating absorber;
in the drawing the view of the figure,
10. a generator;
11. a heat collector;
12. a circulating water pump;
20. a condenser;
30. a throttle member;
40. an evaporator;
51. a first ejector type heat insulation absorber;
52. a second ejector type heat insulation absorber;
501. a mixing absorption chamber;
502. a constant pressure absorption chamber;
503. a diffusion absorption chamber;
60. a cooler;
71. a first solution pump;
72. a second solution pump;
80. a regulating valve;
90. a solution heat exchanger.
Description of the embodiments
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be mechanically coupled, directly coupled, or indirectly coupled via an intermediate medium. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.
The air cooling cooler and the heat insulation absorber are adopted to replace an air cooling pipe inner falling film absorber in the traditional air cooling type absorption refrigerator, so that the problems of large air cooling type absorption refrigerator and low energy efficiency can be effectively solved.
The absorption mass transfer process is carried out in the heat insulation absorber, the heat transfer process is carried out in the air cooling cooler, and the heat transfer mass transfer process is reinforced in stages, so that the refrigeration efficiency of the traditional air cooling type absorption refrigerator can be effectively improved, and the unit volume is reduced; however, with the decrease of the occurrence temperature and the increase of the environmental temperature, the refrigerating efficiency of the unit is rapidly reduced to be invalid, and the refrigerating temperature, the refrigerating efficiency and the adaptation temperature area of the air-cooled adiabatic absorption refrigerator still need to be broken through.
As shown in fig. 1, the present application proposes an absorption refrigeration system including a generator 10, a condenser 20, a throttle member 30, an evaporator 40, a first ejector-type heat-insulating absorber 51, a second ejector-type heat-insulating absorber 52, a cooler 60, a solution heat exchanger 90, a first solution pump 71, and a second solution pump 72; the generator 10 is externally connected with a heat collector 11 and a circulating water pump 12, wherein the heat collector 11 is used for heating and boiling the low-temperature dilute solution in the generator 10 to generate high-temperature high-pressure concentrated solution.
Specifically, the generator 10 is further provided with a circulating water outlet and a circulating water inlet, and circulating water is output from the circulating water outlet, enters the heat collector 11 through the circulating water pump 12, is heated and boiled by the heat collector 11, and is then returned to the generator 10 from the circulating water inlet.
The solution outlet of the generator 10 is connected to the working fluid inlet of the first ejector heat-insulating absorber 51, the outlet of the first ejector heat-insulating absorber 51 is connected to the inlet of the second solution pump 72,
the outlet of the second solution pump 72 is connected to the inlet of the cooler 60, the outlet of the cooler 60 is connected to the working fluid inlet of the second ejector heat-insulating absorber 52, the outlet of the second ejector heat-insulating absorber 52 is divided into two paths, one path is connected to the solution inlet of the generator 10 via the first solution pump 71, and the other path is connected to the inlet of the second solution pump 72 together with the outlet of the first ejector heat-insulating absorber 51.
The working fluid line between the solution outlet of the generator 10 and the working fluid inlet of the first ejector heat-insulating absorber 51 exchanges heat with the working fluid line between the outlet of the first solution pump 71 and the solution inlet of the generator 10 through the solution heat exchanger 90.
A regulating valve 80 is provided in series with the line between the outlet of the second ejector 52 and the inlet of the second solution pump 72 for regulating the flow ratio between the two flow paths output from the second ejector 52.
The specific flow process of the working fluid and the steam is as follows: the high-temperature and high-pressure concentrated solution generated by the heat collector 11 of the generator 10 after being heated and boiled is outputted from the solution outlet of the generator 10, and is subjected to heat exchange with the low-temperature diluted solution from the first solution pump 71 in the solution heat exchanger 90.
The concentrated solution with heat release and temperature reduction is taken as working fluid, enters the first jet type heat insulation absorber 51 from a working fluid inlet of the first jet type heat insulation absorber 51, and the saturated steam is output by the ejector evaporator 40 in the process that the working fluid flows in the first jet type heat insulation absorber 51, and the solution and the steam are fully mixed in the first jet type heat insulation absorber 51 and sequentially complete the pressurization synergy and heat insulation absorption process to generate the saturated solution.
The saturated solution output by the first jet type heat insulation absorber 51 is fully mixed with the recycled solution output by the second jet type heat insulation absorber 52, the mixture enters the second solution pump 72 to be pressurized, then enters the air cooling cooler 60 to release heat and cool down, then enters the second jet type heat insulation absorber 52 as working fluid, the ejector evaporator 40 outputs saturated steam into the second jet type heat insulation absorber 52, the solution and the steam are fully mixed in the second jet type heat insulation absorber 52, and the pressurizing synergy and heat insulation absorption processes are sequentially completed to generate saturated solution.
The saturated solution output by the second jet type heat insulation absorber 52 is divided into two paths, one path enters the first solution pump 71 for pressurization, then enters the solution heat exchanger 90 for heat exchange with the high-temperature high-pressure concentrated solution at the outlet of the generator 10, the dilute solution with heat absorption and temperature rise enters the generator 10 for reheating and boiling by the solar heat collection subsystem, and the other path enters the second solution pump 72 for pressurization after being mixed with the saturated solution output by the first jet type heat insulation absorber 51.
The generator 10 outputs high-temperature and high-pressure refrigerant vapor, enters the condenser 20 to exchange heat with the external environment, and saturated liquid after heat release and condensation enters the throttling part 30, and the refrigerant vapor is adiabatically throttled in the throttling part 30 to be refrigerant wet vapor under evaporation pressure.
The wet steam enters the evaporator 40 to exchange heat with the chilled water, and the evaporation absorbs heat to be saturated steam. The saturated steam at the outlet of the evaporator 40 is divided into two paths which are used as injection fluid and respectively enter the first jet type heat insulation absorber 51 and the second jet type heat insulation absorber 52 to complete the boosting and heat insulation absorption process and is absorbed by solution in a heat insulation way.
The high-temperature high-pressure concentrated solution at the outlet of the generator 10 is supercooled through the solution heat exchanger 90, and enters the first jet type adiabatic absorber 51 as working fluid, and the jet evaporator 40 outputs saturated steam to complete the first adiabatic absorption process of the solution.
The saturated solution at the outlet of the first jet type heat insulation absorber 51 is fully mixed with the recycled solution at the outlet of the second jet type heat insulation absorber 52, the mixture is pressurized by the second solution pump 72 and then enters the air-cooled cooler 60 to be cooled, the mixture enters the second jet type heat insulation absorber 52 as working fluid, the saturated steam at the outlet of the evaporator 40 is ejected, the second heat insulation absorption process of the solution is completed, and the step sectional absorption of the solution is realized.
The generator 10, the solution heat exchanger 90, the first jet heat insulation absorber 51, the second solution pump 72, the cooler 60, the second jet heat insulation absorber 52, and the first solution pump 71 are connected in series in this order; the generator 10, the condenser 20, the throttle member 30, and the evaporator 40 are sequentially connected in series.
The saturated refrigerant vapor generated by the evaporator 40 is divided into two paths, and is used as injection fluid, and enters the first injection type heat insulation absorber 51 and the second injection type heat insulation absorber 52 respectively, and is fully absorbed by the solution.
The first jet type heat insulation absorber 51 and the second jet type heat insulation absorber 52 are integrated with each other, and can respectively realize boosting effect of injection fluid and heat insulation absorption process of working fluid.
As shown in fig. 2, specifically, each of the first jet type heat insulation absorber 51 and the second jet type heat insulation absorber 52 includes a mixing absorption chamber 501, a constant pressure absorption chamber 502, and a diffusion absorption chamber 503, where the mixing absorption chamber 501 is configured to mix a working fluid input from a working fluid inlet and saturated steam input from a steam inlet, and the mixed fluid passes through the constant pressure absorption chamber 502 and the diffusion absorption chamber 503 to complete a boosting and heat insulation absorption process, form a saturated solution, and is transported forward.
The throttle 30 is any one of a thermal expansion valve, a capillary valve, or an electronic expansion valve.
The heat source of the solar heat collection subsystem mainly is solar energy, and can also be one or more of mixed energy such as waste heat generated by a factory, underground water source heat energy and the like.
The heat exchangers such as the solution heat exchanger 90 and the evaporator 40 are plate heat exchangers, double pipe heat exchangers or shell-and-tube heat exchangers.
The working medium of the solar heat collection subsystem is water or industrial waste heat; the working medium of the absorption-injection composite circulation subsystem is LiBr/H 2 O。
The condenser 20 is an air-cooled condenser 20, the cooler 60 is an air-cooled cooler 60, and the condenser 20 and the cooler 60 are both fin heat exchangers.
The absorption refrigeration system related by the application utilizes a heat-insulating absorption refrigeration mode with double ejectors to recover the expansion work of high-temperature and high-pressure solution, strengthen the heat transfer and mass transfer section by section in the absorption process, increase the absorption pressure and strengthen the absorption effect, realize the step section absorption of concentrated solution, solve the problems of higher generation temperature, overlarge solution circulation multiplying power, overlarge refrigeration efficiency of the system, smaller refrigeration temperature area and overlarge unit volume existing in the traditional air-cooled single-effect absorption circulation, achieve the purposes of saving high-grade electric energy, reducing the unit volume, improving the refrigeration efficiency and expanding the applicable temperature area of the air-cooled absorption refrigeration circulation, and meet the demands on low-temperature cold water in life or production.
In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative embodiments of the present invention, and the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be covered by the present invention, and the scope of the present invention shall be defined by the appended claims.

Claims (9)

1. An absorption refrigeration system, comprising:
the device comprises a generator, a condenser, a throttling component, an evaporator, a first jet type heat insulation absorber, a second jet type heat insulation absorber, a cooler, a solution heat exchanger, a first solution pump and a second solution pump;
the solution outlet of the generator is connected with the working fluid inlet of the first jet type heat insulation absorber, the outlet of the first jet type heat insulation absorber is connected with the inlet of the second solution pump, the outlet of the second solution pump is connected with the inlet of the cooler, the outlet of the cooler is connected with the working fluid inlet of the second jet type heat insulation absorber, the outlet of the second jet type heat insulation absorber is divided into two paths, one path passes through the first solution pump to be connected with the solution inlet of the generator, and the other path is connected with the inlet of the second solution pump together with the outlet of the first jet type heat insulation absorber;
the steam outlet of the generator is respectively connected with the steam inlet of the first jet type heat insulation absorber and the steam inlet of the second jet type heat insulation absorber after passing through the condenser, the throttling component and the evaporator;
and a regulating valve is arranged on a pipeline between the outlet of the second jet type heat insulation absorber and the inlet of the second solution pump in series.
2. An absorption refrigeration system according to claim 1 wherein,
the generator is also provided with a circulating water outlet and a circulating water inlet, circulating water is output from the circulating water outlet, enters the heat collector through the circulating water pump, is heated and boiled by the heat collector, and is conveyed back into the generator from the circulating water inlet.
3. An absorption refrigeration system according to claim 1 wherein,
and a working medium pipeline between a solution outlet of the generator and a working fluid inlet of the first jet type heat insulation absorber exchanges heat with a working medium pipeline between an outlet of the first solution pump and a solution inlet of the generator through a solution heat exchanger.
4. An absorption refrigeration system according to claim 1 wherein,
the first jet type heat insulation absorber and the second jet type heat insulation absorber comprise a mixing absorption chamber, a constant pressure absorption chamber and a diffusion absorption chamber.
5. An absorption refrigeration system according to claim 1 wherein,
the throttling component is a thermal expansion valve, a capillary valve or an electronic expansion valve.
6. An absorption refrigeration system according to claim 2 wherein,
the energy of the heat collector is derived from one or more of solar energy, factory waste heat energy and groundwater source heat energy.
7. An absorption refrigeration system according to claim 3 wherein,
the solution heat exchanger is a plate heat exchanger, a sleeve heat exchanger or a shell-and-tube heat exchanger.
8. An absorption refrigeration system according to claim 1 wherein,
the evaporator is a plate heat exchanger, a sleeve heat exchanger or a shell-and-tube heat exchanger.
9. An absorption refrigeration system according to claim 1 wherein,
the condenser is an air-cooled condenser, the cooler is an air-cooled cooler, and the condenser and the cooler are both fin type heat exchangers.
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