CN116123749B - Pump-driven jet boosting diffusion absorption type heat converter - Google Patents

Abstract

The invention provides an injection boosting diffusion absorption type heat converter without electric pump driving, which comprises a working vapor generator, an injector, a working vapor condenser, a buffer separator, a first stop valve, a second stop valve, a buffer liquid storage device, a third stop valve and a fourth stop valve; the refrigerant generating and absorbing module comprises a refrigerant generator, a riser, a solution separator, a refrigerant condenser, a refrigerant separator, an evaporator, an absorber, a liquid reservoir and a solution heat exchanger; the ejector is adopted to eject the diffusion gas, so that the problem that the traditional absorption type heat converter needs to input extremely high-grade electric energy is solved, full-heat driving is realized, a heat driving pump is used for pumping and separating the refrigerant and the solution, the corrosion problem can be avoided, and the system circulation structure is simplified.

Description

A pumpless jet-boosted diffusion-absorption heat exchanger

Technical Field

The invention relates to the technical field of absorption heat converters, in particular to an injection-pressurization-diffusion absorption heat converter without pump drive.

Background technique

The absorption heat converter inputs medium-temperature heat sources such as solar energy, geothermal energy, and industrial waste heat into the generator and evaporator, and releases part of the low-temperature heat to the environment through the condenser, in order to obtain part of the high-temperature heat in the absorber, which accounts for about 50% of the input heat. The absorption heat converter can be driven by low-grade heat sources, and can effectively utilize low-grade heat sources such as industrial waste heat, geothermal energy, and solar energy to achieve energy conservation, emission reduction, and consumption reduction; and it mostly uses natural working fluids such as _H2O -LiBr solution, which is environmentally friendly, so it is of great significance to energy conservation and environmental protection. However, although the traditional absorption heat converter can realize the utilization of low-grade heat, power consumption still exists, and the solution pump also faces the problem of high-temperature corrosion, especially for systems using lithium bromide aqueous solution as the working fluid.

In order to achieve zero electrical input, diffusion absorption heat converter technology has been developed. By adding and separating diffusion gas, the system can be operated under near-isobaric conditions, which makes the application of bubble pumps possible. The diffusion absorption heat converter combines the principles of diffusion absorption and bubble pumps with traditional absorption heat converters, including a diffusion gas generation module and a refrigerant generation absorption module. The chemical potential difference of the refrigerant in the system replaces the refrigerant pressure difference in the traditional absorption heat converter, and a heat-driven bubble pump is used to replace the original solution pump and refrigerant pump and other electric-driven pumps to achieve simultaneous pumping and separation of absorbent solution and refrigerant. It does not consume any electrical energy and has no mechanical moving parts, avoiding the high-temperature corrosion problem of electric-driven pumps and is more free in the choice of working fluid.

The most researched one at present is the diffusion absorption heat converter with double bubble pump. However, since the theoretical analysis of bubble pump is not perfect and the actual performance of bubble pump is affected by many factors, the use of two bubble pumps exacerbates and amplifies the uncertainty of the operation of this diffusion absorption heat converter, making the heating performance of the system greatly restricted by the performance of bubble pump. Ultimately, the performance analysis of this diffusion absorption heat converter is not accurate enough and the experimental results are restricted by many operating parameters, so the heating capacity of the diffusion absorption heat converter cannot be fully utilized.

Summary of the invention

In view of the above technical problems, a pumpless injection-pressurization-diffusion-absorption heat converter is provided.

The technical means adopted by the present invention are as follows:

An injection-pressurized diffusion-absorption heat converter driven by no electric pump, the heat converter comprising a diffusion gas injection-pressurized module and a refrigerant generation-absorption module;

The diffusion gas injection supercharging module includes a working steam generator, an ejector, a working steam condenser, a buffer separator and a buffer liquid reservoir;

The buffer reservoir liquid outlet of the buffer reservoir is connected to the working steam generator liquid inlet of the working steam generator through a third stop valve; the steam outlet of the working steam generator is connected to the ejector air inlet of the ejector, and the steam outlet of the working steam generator is connected to the buffer reservoir liquid inlet of the buffer reservoir through a fourth stop valve; the ejector port of the ejector is connected to the working steam condenser inlet of the working steam condenser, the buffer reservoir air outlet of the buffer reservoir is connected to the working steam condenser inlet through a second stop valve, and the working steam condenser outlet of the working steam condenser is connected to the buffer separator inlet of the buffer separator; the buffer separator liquid outlet of the buffer separator is connected to the buffer reservoir liquid inlet of the buffer reservoir through a first stop valve;

The refrigerant generation and absorption module includes a refrigerant generator, a riser, a solution separator, a refrigerant condenser, a refrigerant separator, an evaporator, an absorber, a liquid storage device, and a solution heat exchanger;

The liquid reservoir outlet of the liquid reservoir is connected to the first inlet of the solution heat exchanger, the first outlet of the solution heat exchanger is connected to the refrigerant generator liquid inlet of the refrigerant generator, the refrigerant generator air inlet of the refrigerant generator is connected to the buffer separator air outlet of the buffer separator, the refrigerant generator outlet of the refrigerant generator is connected to the bottom end of the lifting pipe, the top end of the lifting pipe is connected to the solution separator inlet of the solution separator, the solution separator air outlet of the solution separator is connected to the condensation inlet of the refrigerant condenser, the condensation outlet of the refrigerant condenser is connected to the refrigerant separator inlet of the refrigerant separator, the refrigerant separator air outlet of the refrigerant separator is connected to the injection port of the ejector, the refrigerant separator liquid outlet of the refrigerant separator is connected to the evaporation inlet of the evaporator, the evaporation outlet of the evaporator is connected to the absorber first inlet of the absorber, and the absorber outlet of the absorber is connected to the liquid reservoir inlet of the liquid reservoir; the solution separator liquid outlet of the solution separator is connected to the first inlet of the solution heat exchanger, and the second outlet of the solution heat exchanger is connected to the absorber second inlet of the absorber.

The dilute solution stored in the liquid storage device is precooled by the solution heat exchanger under the action of gravity and then enters the refrigerant generator. The dilute solution includes a refrigerant and an absorbent. The refrigerant is heated in the refrigerant generator, diffuses and evaporates into the diffusion gas to form a mixed gas. The mixed gas carries part of the dilute solution and is lifted in the lifting pipe and enters the solution separator for separation. The separated mixed gas enters the refrigerant condenser and condenses, and then enters the refrigerant separator. The refrigerant becomes liquid and is separated from the diffusion gas which is still in a gaseous state. The liquid refrigerant flows into the evaporator by gravity to evaporate and become gaseous again, and then enters the absorber.

The liquid separated by the solution separator is a concentrated solution containing the refrigerant and the absorbent. The concentrated solution enters the solution heat exchanger by gravity for heat exchange and preheating, then enters the absorber to absorb the refrigerant that has become gaseous and releases heat, and the concentrated solution becomes a dilute solution again. The dilute solution flows into the liquid reservoir by gravity, and the liquid in the liquid reservoir flows into the solution heat exchanger by gravity for heat exchange and cooling, and then re-enters the refrigerant generator;

The working steam generated by the working steam generator enters the ejector from the steam outlet of the working steam generator as the working fluid of the ejector, and the ejector draws the diffused gas from the refrigerant separator, and the ejector ejects the working steam and the diffused gas from the working steam condenser inlet of the working steam condenser into the working steam condenser for condensation, and after condensation, the diffused gas enters the buffer separator for separation, and the diffused gas re-enters the refrigerant generator from the buffer separator;

The working steam entering the buffer separator becomes liquid, and the buffer separator liquid outlet at the bottom of the buffer separator is connected to the buffer reservoir liquid inlet of the buffer reservoir through the first stop valve; the bottom outlet of the buffer reservoir is connected to the working steam generator liquid inlet of the working steam generator through the third stop valve, and the steam outlet is connected to the buffer reservoir liquid inlet of the buffer reservoir through the fourth stop valve. The buffer reservoir exhaust port at the top of the buffer reservoir is connected to the working steam condenser inlet of the working steam condenser through the second stop valve.

The diffusion gas injection booster module has two working modes:

Liquid storage mode: the first stop valve and the second stop valve are opened, and the third stop valve and the fourth stop valve are closed;

Liquid return mode: the third stop valve and the fourth stop valve are opened, and the first stop valve and the second stop valve are closed.

Preferably, the refrigerant condenser is located at the highest position of the heat converter, the refrigerant separator is lower than the refrigerant condenser, the evaporator is lower than the refrigerant separator, the absorber is lower than the evaporator, the liquid reservoir is lower than the absorber, the solution heat exchanger is lower than the liquid reservoir, the solution separator is lower than the refrigerant condenser, the riser is lower than the solution separator, the refrigerant generator is lower than the riser, the solution separator outlet of the solution separator is higher than the absorber second inlet of the absorber; the buffer separator is lower than the working steam condenser, the buffer reservoir is lower than the buffer separator and lower than the ejector; the working steam generator is lower than the buffer reservoir.

Preferably, the refrigerant used in the heat converter is one or more of water, hydrocarbons, hydrocarbon halides, alcohols or ethers.

Preferably, the absorbent used in the heat converter is one or more of salts, alcohols or ethers, ketones, amines, aldehydes or ionic liquids.

Preferably, the diffuser gas molecules should be as small as possible, the boiling point should be much lower than the boiling point of the refrigerant, and it should be insoluble in the refrigerant, absorbent and liquid working vapor. The diffuser used in the heat converter is hydrogen, inert gas, hydrocarbons, hydrocarbon halides or carbon dioxide.

Preferably, the working steam should be selected to have a suitable saturated vapor pressure at the corresponding temperature, and the diffusion gas that meets the delivery volume and pressure requirements can be injected into the ejector. At the same time, the amount of the diffusion gas entering the refrigerant generator together with the diffusion gas should be minimized to avoid affecting the refrigerant generation process.

Compared with the prior art, the present invention has the following advantages:

1. The absorbent and refrigerant are pumped simultaneously using a heat-driven bubble pump, which consumes no electrical energy.

2. There are no moving parts, which solves the corrosion problem of the solution pump at high temperature and improves the reliability of system operation.

3. The introduction of an ejector to boost the diffusion gas injection avoids the uncertainty and performance limitations of the system performance caused by the use of multiple bubble pumps.

Based on the above reasons, the present invention can be widely promoted in the fields of diffusion absorption heat exchanger and the like.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic structural diagram of a pump-free jet-boosted diffusion-absorption heat converter in a specific embodiment of the present invention.

FIG. 2 is a schematic diagram of the structure of an ejector in a specific embodiment of the present invention.

Detailed ways

It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and/or combinations thereof.

Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

As shown in Fig. 1 and Fig. 2, a jet-pressurized diffusion-absorption heat converter driven by no electric pump, the heat converter comprises a diffusion gas jet-pressurized module and a refrigerant generation absorption module;

The diffusion gas injection boosting module includes a working steam generator 1, an ejector 2, a working steam condenser 3, a buffer separator 4, a first stop valve 5, a second stop valve 6, a buffer liquid reservoir 7, a third stop valve 8, and a fourth stop valve 9; the refrigerant generation and absorption module includes a refrigerant generator 10, a riser 11, a solution separator 12, a refrigerant condenser 13, a refrigerant separator 14, an evaporator 15, an absorber 16, a liquid reservoir 17, and a solution heat exchanger 18;

The pipe connection method is as follows:

The buffer reservoir liquid outlet 7c of the buffer reservoir 7 is connected to the working steam generator liquid inlet 1b of the working steam generator 1 through the third stop valve 8; the steam outlet 1a of the working steam generator 1 is connected to the injector air inlet 2a of the injector 2, and the steam outlet 1a of the working steam generator 1 is connected to the buffer reservoir liquid inlet 7a of the buffer reservoir 7 through the fourth stop valve 9; the injection port 2c of the injector 2 is connected to the working steam condenser inlet 3a of the working steam condenser 3, the buffer reservoir exhaust port 7b of the buffer reservoir 7 is connected to the working steam condenser inlet 3a through the second stop valve 6, and the working steam condenser outlet 3b of the working steam condenser 3 is connected to the buffer separator inlet 4a of the buffer separator 4; the buffer separator liquid outlet 4c of the buffer separator 4 is connected to the buffer reservoir liquid inlet 7a of the buffer reservoir 7 through the first stop valve 5;

The liquid storage outlet 17b of the liquid storage tank 17 is connected to the first inlet 18a of the solution heat exchanger 18, the first outlet 18b of the solution heat exchanger 18 is connected to the refrigerant generator liquid inlet 10c of the refrigerant generator 10, the refrigerant generator air inlet 10a of the refrigerant generator 10 is connected to the buffer separator air outlet 4b of the buffer separator 4, the refrigerant generator outlet 10b of the refrigerant generator 10 is connected to the bottom end of the riser 11, the top end of the riser 11 is connected to the solution separator inlet 12a of the solution separator 12, the solution separator air outlet 12b of the solution separator 12 is connected to the condensation inlet 13a of the refrigerant condenser 13, and the condensation outlet 13b of the refrigerant condenser 13 is connected to the bottom end of the riser 11, the top end of the riser 11 is connected to the solution separator inlet 12a of the solution separator 12, the solution separator air outlet 12b of the solution separator 12 is connected to the condensation inlet 13a of the refrigerant condenser 13, and the condensation outlet 13b of the refrigerant condenser 13 is connected to the The refrigerant separator inlet 14a of the refrigerant separator 14 is connected, the refrigerant separator air outlet 14c of the refrigerant separator 14 is connected to the injection port 2b of the ejector 2, the refrigerant separator liquid outlet 14b of the refrigerant separator 14 is connected to the evaporation inlet 15a of the evaporator 15, the evaporation outlet 15b of the evaporator 15 is connected to the absorber first inlet 16a of the absorber 16, and the absorber outlet 16b of the absorber 16 is connected to the liquid reservoir inlet 17a of the liquid reservoir 17; the solution separator liquid outlet 12c of the solution separator 12 is connected to the first inlet 18c of the solution heat exchanger 18, and the second outlet 18d of the solution heat exchanger 18 is connected to the absorber second inlet 16b of the absorber 16.

The upper and lower position relationship is as follows:

The refrigerant condenser 13 is located at the highest position of the heat converter, the refrigerant separator 14 is lower than the refrigerant condenser 13, the evaporator 15 is lower than the refrigerant separator 14, the absorber 16 is lower than the evaporator 15, the liquid reservoir 17 is lower than the absorber 16, the solution heat exchanger 18 is lower than the liquid reservoir 17, the solution separator 12 is lower than the refrigerant condenser 13, the riser 11 is lower than the solution separator 12, the refrigerant generator 10 is lower than the riser 11, and the solution separator liquid outlet 12c of the solution separator 12 is higher than the absorber second inlet 16b of the absorber 16; the buffer separator 4 is lower than the working steam condenser 3, the buffer liquid reservoir 7 is lower than the buffer separator 4, and lower than the ejector 2; the working steam generator 1 is lower than the buffer liquid reservoir 7.

The medium used in the heat converter is as follows:

The refrigerant used in the heat converter is one or more of water, hydrocarbons, hydrocarbon halides, alcohols or ethers. The absorbent is one or more of salts, alcohols or ethers, ketones, amines, aldehydes or ionic liquids. The diffuser is hydrogen, inert gas, hydrocarbons, hydrocarbon halides or carbon dioxide. The diffuser gas molecules should be as small as possible, the boiling point should be much lower than the boiling point of the refrigerant, and it should be insoluble in the refrigerant, absorbent and liquid working vapor.

The structure of the components in the heat converter is described as follows:

The lifting pipe 11 mainly serves to lift the solution and drive the solution circulation, and can be a general metal pipe or a pressure-resistant hose; the buffer separator 4, solution separator 12 and refrigerant separator 14 are used to balance the two-phase mixture entering therein, with the gas phase flowing out from the top and the liquid phase flowing out from the bottom. The steam generator 1, working steam condenser 3, refrigerant generator 10, refrigerant condenser 13, evaporator 15, absorber 16 and solution heat exchanger 18 are all heat exchangers, which can be spray-type or immersion-type, or can be sleeve-type or other forms, and the heat exchange tubes can be ordinary tubes or enhanced tubes.

The heat converter can be divided into low-temperature heat source (environment, about 30°C), medium-temperature heat source (i.e., input heat source of refrigerant generator 10 and evaporator 15, about 90°C), and high-temperature heat source (i.e., high-temperature heat released in absorber 16, about 120°C). The system is driven entirely by thermal energy, and the quality of thermal energy is improved without consuming any electrical or mechanical energy. It has good application prospects in recycling medium- and low-temperature thermal resources and improving energy utilization.

In this specific implementation, water is used as the refrigerant, lithium bromide is used as the absorbent, helium is used as the diffusion gas, and cyclopentane is used as the working vapor.

The flow of water, lithium bromide and helium in the refrigerant generation absorption module is as follows:

The lithium bromide dilute solution stored in the liquid storage tank 17 enters the refrigerant generator 10 after being cooled by the solution heat exchanger 18 under the action of gravity. At the same time, the helium from the buffer separator 4 also enters the refrigerant generator 10. The gas phase composition in the refrigerant generator 10 changes, so that the chemical potential of the refrigerant water in the lithium bromide aqueous solution will be greater than its chemical potential in the gas phase. Therefore, the refrigerant water in the lithium bromide solution diffuses and evaporates into the diffusion gas helium, the concentration of the lithium bromide solution increases, water is generated and mixed into the diffusion gas helium to form a mixed gas, and at the same time, the outside world inputs a certain amount of medium-temperature heat into the refrigerant generator 10 to supply the energy required for the evaporation of water and the energy required for the heating of the diffusion gas, thereby completing the diffusion generation process of the refrigerant.

The mixed gas formed by water vapor and helium carries part of the lithium bromide concentrated solution in the refrigerant generator 10 into the riser 11. According to the thermal siphon effect of the bubble pump, the mixed gas carries the lithium bromide concentrated solution into the solution separator 12 for separation. After the separated mixed gas enters the refrigerant condenser 13 for condensation, the water vapor will condense into liquid water and release low-temperature condensation heat to the environment, and the helium will remain in a gaseous state, and then enter the refrigerant separator 14 for separation. The liquid water flows into the evaporator 15 by gravity to evaporate, and is heated by an external medium-temperature heat source to evaporate to form water vapor, and then enters the absorber 16;

The lithium bromide concentrated solution separated by the solution separator 12 enters the solution heat exchanger 18 by gravity for heat exchange and preheating, and then enters the absorber 16. In the absorber 16, the lithium bromide concentrated solution meets gaseous water. However, unlike the environment in which they exist in the refrigerant generator 10, there is no longer any diffused gas helium in the absorber 16. The gas phase is almost entirely water vapor with an extremely high chemical potential. The chemical potential of water in the lithium bromide concentrated solution will be lower than the chemical potential of gaseous water from the evaporator 15. The lithium bromide solution will restore its water absorption capacity that was previously suppressed by the diffused gas helium, absorb water vapor from the evaporator 15, and release a large amount of high temperature for use. This is the most important manifestation of the system's heating function. The absorbent that absorbs the refrigerant flows into the liquid reservoir 17 by itself, and the liquid in the liquid reservoir 17 flows into the solution heat exchanger 18 for heat exchange and cooling, and then re-enters the refrigerant generator 10; it should be noted that the heat exchange in the solution heat exchanger 18 refers to the heat exchange between the high-temperature absorbent flowing out of the liquid reservoir 17 and the low-temperature absorbent flowing out of the solution separator 12.

The flow of cyclopentane and helium in the diffusion gas injection booster module is as follows:

The diffusion gas injection booster module has two working modes:

Liquid storage mode: the first stop valve 5 and the second stop valve 6 are opened, and the third stop valve 8 and the fourth stop valve 9 are closed; a medium-temperature heat source is input into the working steam generator 1 to generate high-pressure working steam, which enters the ejector 2 and then injects the low-temperature and low-pressure diffusion gas from the refrigerant separator 14, and after mixing, a medium-temperature and medium-pressure mixed gas is formed. After entering the working steam condenser 3, the working steam is condensed into a low-temperature and medium-pressure liquid and enters the buffer separator 4, and then enters the liquid storage tank 7; the low-temperature and low-pressure diffusion gas re-enters the refrigerant generator 10.

Liquid return mode: the third stop valve 8 and the fourth stop valve 9 are open, and the first stop valve 5 and the second stop valve 6 are closed. In order to allow the medium-pressure cyclopentane liquid to enter the high-pressure working steam generator 1, part of the high-pressure working steam is released into the buffer reservoir 7 to balance the pressure therein, and the liquid in the buffer reservoir 7 flows into the steam generator 1 under the action of gravity. At the same time, the generated cyclopentane gas is still used as a working fluid to induce helium, and the helium is not affected by the supply of helium to the refrigerant generator as a diffusion gas, while the cyclopentane liquid condensed in the working steam condenser 3 is temporarily stored in the buffer separator 4. When all the cyclopentane liquid in the buffer reservoir 4 flows into the steam generator, the liquid storage mode is restored.

The present invention proposes a jet-boosted diffusion-absorption heat converter cycle driven by no electric pump, in which the diffusion gas is pressurized by an ejector 2 using gravity liquid supply, and the flow of the refrigerant and its solution utilizes the thermal siphon principle of a bubble pump, thereby realizing an innovative improvement to the diffusion-absorption heat converter. By changing the phase equilibrium relationship of the absorbent, refrigerant and diffusion gas mixture at different temperatures and concentrations, different chemical potential differences of the refrigerant in the absorbent solution and gas phase are created under near-isobaric conditions, so that the temperature of the absorption process is higher than the temperature of the generation process, and finally the production of high-temperature heat is realized. The entire system organically combines the ejector 2, the bubble pump and the absorption system, all of which are driven by thermal energy, and achieves an improvement in thermal energy quality without consuming any electrical energy or mechanical energy, thereby improving the reliability of operation. It has good application prospects in recycling and utilizing medium and low temperature thermal resources and improving energy utilization.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims (5)

1. A pump-free jet-pressurized diffusion-absorption heat converter, characterized in that the heat converter comprises a diffusion gas jet-pressurized module and a refrigerant generation and absorption module; The refrigerant generation and absorption module comprises a refrigerant generator (10), a riser (11), a solution separator (12), a refrigerant condenser (13), a refrigerant separator (14), an evaporator (15), an absorber (16), a liquid storage device (17), and a solution heat exchanger (18); The dilute solution stored in the liquid storage device (17) is precooled by the solution heat exchanger (18) under the action of gravity and then enters the refrigerant generator (10). The dilute solution includes a refrigerant and an absorbent. The refrigerant is heated in the refrigerant generator (10), diffuses and evaporates into the diffusion gas to form a mixed gas. The mixed gas carries part of the absorbent and is lifted in the lifting pipe (11) and enters the solution separator (12) for separation. The separated mixed gas enters the refrigerant condenser (13) for condensation and then enters the refrigerant separator (14). The refrigerant becomes liquid and is separated from the diffusion gas which is still in a gaseous state. The liquid refrigerant flows into the evaporator (15) by gravity to evaporate and become gaseous again, and then enters the absorber (16). The liquid separated by the solution separator (12) is a concentrated solution containing the refrigerant and the absorbent. The concentrated solution enters the solution heat exchanger (18) by gravity for heat exchange and preheating, then enters the absorber (16) to absorb the refrigerant that has become gaseous and releases heat. The concentrated solution that has absorbed the refrigerant becomes a dilute solution again. The dilute solution flows by gravity into the liquid storage device (17). The liquid in the liquid storage device (17) flows by gravity into the solution heat exchanger (18) for heat exchange and cooling, then re-enters the refrigerant generator (10); The diffusion gas injection boosting module comprises a working steam generator (1), an ejector (2), a working steam condenser (3), a buffer separator (4) and a buffer liquid storage tank (7); The working steam generated by the working steam generator (1) enters the ejector (2) from the steam outlet (1a) of the working steam generator (1) and serves as the working fluid of the ejector (2). The ejector (2) ejects the diffused gas from the refrigerant separator (14). The ejector (2) ejects the working steam and the diffused gas from the working steam condenser inlet (3a) of the working steam condenser (3) into the working steam condenser (3) for condensation. After condensation, the diffused gas enters the buffer separator (4) for separation. The diffused gas re-enters the refrigerant generator (10) from the buffer separator (4). The working steam entering the buffer separator (4) changes into a liquid state, and the buffer separator liquid outlet (4c) at the bottom of the buffer separator (4) is connected to the buffer reservoir liquid inlet (7a) of the buffer reservoir (7) through a first stop valve (5); the bottom outlet of the buffer reservoir (7) is connected to the working steam generator liquid inlet (1b) of the working steam generator (1) through a third stop valve (8), the steam outlet (1a) is connected to the buffer reservoir liquid inlet (7a) of the buffer reservoir (7) through a fourth stop valve (9), and the buffer reservoir exhaust port (7b) at the top of the buffer reservoir (7) is connected to the working steam condenser inlet (3a) of the working steam condenser (3) through a second stop valve (6); The diffusion gas injection booster module has two working modes: Liquid storage mode: the first stop valve (5) and the second stop valve (6) are opened, and the third stop valve (8) and the fourth stop valve (9) are closed; Liquid return mode: the third stop valve (8) and the fourth stop valve (9) are opened, and the first stop valve (5) and the second stop valve (6) are closed. 2. A pumpless jet-boosted diffusion-absorption heat exchanger according to claim 1, characterized in that the refrigerant condenser (13) is located at the highest position of the heat exchanger, the refrigerant separator (14) is lower than the refrigerant condenser (13), the evaporator (15) is lower than the refrigerant separator (14), the absorber (16) is lower than the evaporator (15), the liquid reservoir (17) is lower than the absorber (16), the solution heat exchanger (18) is lower than the liquid reservoir (17), and the solution separator (12) is lower than the A refrigerant condenser (13), the riser (11) is lower than the solution separator (12), the refrigerant generator (10) is lower than the riser (11), the solution separator liquid outlet (12c) of the solution separator (12) is higher than the absorber second inlet (16b) of the absorber (16); the buffer separator (4) is lower than the working steam condenser (3), the buffer liquid reservoir (7) is lower than the buffer separator (4) and lower than the ejector (2); and the working steam generator (1) is lower than the buffer liquid reservoir (7). 3. A pumpless jet-boosted diffusion-absorption heat converter according to claim 1, characterized in that the refrigerant is one or more of water, hydrocarbons, hydrocarbon halides, alcohols or ethers. 4. A pumpless jet-boosted diffusion-absorption heat converter according to claim 1, characterized in that the absorbent is one or more of salts, alcohols or ethers, ketones, amines, aldehydes or ionic liquids. 5. A pumpless jet-boosted diffusion-absorption heat converter according to claim 1, characterized in that the diffusion gas is hydrogen, inert gas, hydrocarbons, hydrocarbon halides or carbon dioxide.