JPH1114181A - Absorption refrigeration equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To condense a part of a refrigerant vapor by utilizing a property that an absorbent component contained in a refrigerant is condensed earlier than a refrigerant, thereby forming a condensed liquid containing a large amount of an absorbent component. By taking it out, the purity of the circulating refrigerant is improved. In A absorption refrigerating apparatus, a part of the heat possessed by the high-temperature refrigerant vapor g ₁ derived from the generator 2 from the absorber 8 of the absorbent concentrated solution l ₂ to be guided to the generator 2 heat recovery Concentrated solution l ₂ bypassing the solution heat exchanger 9
A heat recovery air-liquid heat exchanger 13 for recovering the, and a second gas-liquid separator 14 for separating the absorbent component contained in the refrigerant vapor g ₁ derived from the heat recovery gas-liquid heat exchanger 13 In addition, the second gas-liquid separator 14 condenses and separates the absorbent component contained in the refrigerant vapor g ₁ , whereby the condenser 4
To improve the purity of the refrigerant vapor g ₁ supplied to the heater 2, and the amount of heat of the high-temperature refrigerant vapor g ₁ introduced from the generator 2 is reduced by the absorption concentrated solution l ₂ introduced to the generator 2 from the absorber 8. Some parts can be collected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigeration system.

[0002]

2. Description of the Related Art For example, as shown in FIG. 4, an absorption refrigerating apparatus using an alternative refrigerant such as R407c having no chlorine atom as a refrigerant and using a refrigerating machine oil or the like as an absorbing liquid has a heating means (for example, a gas burner). It is heated by 1), and generator 2 for generating a high-temperature refrigerant vapor g _1, a gas-liquid separator 3 for separating the absorbent component contained in the high-temperature refrigerant vapor g ₁ generated by the generator 2, cooling reduced pressure and the condenser 4 for condensing and liquefying the hot refrigerant vapor g ₁ derived from gas-liquid separator 3 at the time of operation, a pressure reducing mechanism 5 for decompressing the refrigerant condensed and liquefied by the condenser 4, by the pressure reducing mechanism 5 an evaporator 6, the absorption heat generated when is absorbed into the absorbent dilute solution l ₁ led the cryogen vapor g ₂ which is vaporized by the evaporator 6 from the generator 2 recovery of refrigerant vaporized which is Absorption heat exchanger 7 And air-cooled absorber 8 to further absorb the refrigerant vapor into the solution derived from said absorber heat exchanger 7, wherein from the generator 2 from the air-cooling absorber 8 to absorb concentrated solution l ₂ of the course to be guided to the generator 2 It is constituted by a heat-recovery solution heat exchanger 9 for recovering heat held by the absorption heat exchanger in the course 7 is guided to the absorbent dilute solution l _1. Code 10
Is a pump for pumping the concentrated solution l ₂ , 11 is a pump 1
0 subcooler for subcooling the concentrated solution l ₂ in order to protect the,
12 is a pressure reducing mechanism for reducing the pressure of the dilute solution l ₁ from the generator 2.

[0003]

[SUMMARY OF THE INVENTION Incidentally, in the absorption refrigerating apparatus having the above structure, when a combination of a relatively small refrigerant boiling difference absorbing agent, the absorption of the small amount of high-temperature refrigerant vapor g ₁ from the generator 2 Agent components. Such high-temperature refrigerant vapor g ₁ as it condenses, there is a problem that will reduce the refrigeration capacity by Evaporation ebullioscopic.

The present invention has been made in view of the above points, and utilizes a property that an absorbent component contained during refrigerant evaporation condenses before a refrigerant to condense a part of refrigerant vapor. By taking out the condensate containing a lot of absorbent components,
The purpose is to improve the purity of the circulating refrigerant.

[0005]

According to the basic configuration of the present invention (the invention of claim 1), as a means for solving the above-mentioned problems, a generator which is heated by the heating means ₁ and generates a high-temperature refrigerant vapor g1 is provided. 2 and a _first for separating an absorbent component contained in the high-temperature refrigerant vapor g ₁ generated by the generator 2.
A gas-liquid separator 3, a condenser 4 for condensing and liquefying the high-temperature refrigerant vapor g ₁ guided from the gas-liquid separator 3, a decompression mechanism 5 for decompressing the refrigerant condensed and liquefied by the condenser 4, An evaporator 6 for evaporating and evaporating the refrigerant depressurized by the mechanism 5;
The absorption heat exchanger 7 for recovering heat of absorption generated when absorbing a low-temperature refrigerant vapor g ₂ which is vaporized in the absorbing dilute solution l ₁ derived from the generator 2 by the evaporator 6, the absorption heat exchanger vessel and absorber 8 to absorb absorbent concentrated solution l further refrigerant vapor g _{2 2} derived from 7, the absorber 8 the generator 2 to the absorbent concentrated solution l ₂ of the course to be guided to the generator 2 from
Dilute solution l on the way to the absorption heat exchanger 7
_In the absorption refrigeration system including the heat recovery solution heat exchanger 9 for recovering the heat held by the heat recovery steam generated by the high-temperature refrigerant vapor g ₁ guided from the generator 2, the heat generated by the absorber 8 is generated. A gas-liquid heat exchanger 13 for heat recovery, which is a part of the concentrated solution l ₂ guided to the vessel 2 and which is recovered to the concentrated solution l ₂ bypassing the solution heat exchanger 9 for heat recovery; It is attached and the second gas-liquid separator 14 for separating the absorbent component contained in the refrigerant vapor g ₁ derived from use gas-liquid heat exchanger 13.

[0006] By the structure described above, the cooling temperature refrigerant vapor g ₁ derived from the first gas-liquid separator 3 by heat exchange with the absorption concentrated solution l ₂ in the heat-recovery gas-liquid heat exchanger 13 is, it becomes possible to absorbent component contained in the refrigerant vapor g ₁ in the second gas-liquid separator 14 is condensed and separated, the purity of the refrigerant vapor g ₁ supplied to the condenser 4 is improved. Moreover, it becomes possible amount of heat held by the high-temperature refrigerant vapor g ₁ derived from the generator 2 is collected in a part of the absorbent concentrated solution l ₂ is guided to the generator 2 from the absorber 8, the heat recovery efficiency is efficiency.

[0007] As in the second aspect of the present invention, the second
When the condensate l ₃ containing a large amount of the absorbent component separated in the gas-liquid separator 14 is combined with the absorption dilute solution l ₁ supplied from the generator 2 to the solution heat exchanger 9 for heat recovery, enthalpy held by the condensate l ₃ containing a large amount of absorbent component can be effectively used.

[0008] As in the third aspect of the present invention, the second
The heat of the refrigerant vapor g ₁ guided from the gas-liquid separator 14 is transferred to the refrigerant vapor g ₂ on the way to the absorption heat exchanger 7.
A heat recovery steam heat exchanger 15 to recover, the annexed a third gas-liquid separator 16 for separating the absorbent component contained in the refrigerant vapor g ₁ derived from the heat recovery steam heat exchanger 15 In this case, the refrigerant vapor g ₁ guided from the second gas-liquid separator 14
Absorption agent component contained in the will be further condensed and separated, the purity of the refrigerant vapor g ₁ supplied to the condenser 4 is improved in. Moreover, the temperature of the cryogen vapor g ₂ to be supplied to the absorber heat exchanger 7, becomes possible is raised by heat exchange with the hot refrigerant vapor g ₁ in the heat-recovery steam heat exchanger 15, absorbing heat exchanger 7 The heat recovery in the process is further improved.

[0009] As in the invention of claim 4, the third
If the condensate l ₄ of the gas-liquid separator 16 containing a large amount of separated absorber component is combined into condensate l ₃ containing a large amount of absorbent component derived from said second gas-liquid separator 14,
The enthalpies of the condensates l ₃ and l ₄ containing a large amount of the absorbent component can be effectively used.

As in the invention of claim 5, the second
Of the gas-liquid separator 14 condensate l ₃ containing a large amount of separated absorber component is vacuum vaporized in, the subcooler 18 to the condensed liquid refrigerant l ₅ guided by cold heat generated from the condenser 4 to the supercooled as well as attached, if the refrigerant vapor g ₂ derived from supercooled 18 was fed to the absorber heat exchanger 7, from where it is possible to lower the temperature of the condensed liquid refrigerant l ₅ supplied to the evaporator 6 , together with the cooling capacity is improved in the evaporator 6, the temperature of the refrigerant vapor g ₂ to be supplied to the absorber heat exchanger 7 from where you can raise, also improved absorption heat recovery in the absorber heat exchanger 7.

As in the invention of claim 6, a second subcooler 19 is provided in parallel with the subcooler 18, and the second subcooler 19 is provided.
The subcooler 19, and a portion of the condensed liquid refrigerant l ₅ guided refrigerant vapor g ₂ derived from the evaporator 6 from the condenser 4 when is heat exchangeably circulation, the evaporator 6 Since the temperature of the supplied condensed liquid refrigerant ₁₅ can be further reduced, the cooling capacity of the evaporator 6 is further improved, and the refrigerant vapor g ₂ supplied to the absorption heat exchanger 7 is further increased.
Can be increased, so that the absorption heat recovery in the absorption heat exchanger 7 is also improved.

As in the invention of claim 7, the second
The heat of the refrigerant vapor g ₁ guided from the gas-liquid separator 14 is transferred to the refrigerant vapor g ₂ on the way to the absorption heat exchanger 7.
Attached a heat-recovery steam heat exchanger 15 to recover, and the third gas-liquid separator 16 for separating the absorbent component contained in the refrigerant vapor g ₁ derived from the heat recovery steam heat exchanger 15 in , The refrigerant vapor g guided from the second gas-liquid separator 14
It becomes the absorbent component contained in ₁ is further condensed and separated, the purity of the refrigerant vapor g ₁ supplied to the condenser 4 is improved. Moreover, the temperature of the cryogen vapor g ₂ to be supplied to the absorber heat exchanger 7, becomes possible is raised by heat exchange with the hot refrigerant vapor g ₁ in the heat-recovery steam heat exchanger 15, absorbing heat exchanger 7 The heat recovery in the process is further improved.

As in the invention of claim 8, the third
If the condensate l ₄ of the gas-liquid separator 16 containing a large amount of separated absorber component is combined into condensate l ₃ containing a large amount of absorbent component derived from said second gas-liquid separator 14,
Since the temperature of the condensed liquid refrigerant ₁₅ supplied to the evaporator 6 can be further reduced, the cooling capacity of the evaporator 6 is further improved, and the refrigerant vapor g ₂ supplied to the absorption heat exchanger 7 is reduced. Since the temperature can be raised, the absorption heat recovery in the absorption heat exchanger 7 is also improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First Embodiment (Corresponding to Claims 1 to 4) FIG. 1 shows a refrigerant circuit of an absorption refrigeration apparatus according to a first embodiment of the present invention.

This absorption refrigerating apparatus uses an alternative refrigerant such as R407c having no chlorine atom as a refrigerant and uses an organic solvent such as diethylene glycol dimethyl ether or a refrigerating machine oil as an absorbing liquid. similar to that, the heating means (e.g., gas burner 1) is heated by high-temperature refrigerant vapor g ₁ generator 2 for generating, absorbing agent contained in the high-temperature refrigerant vapor g ₁ generated by the generator 2 A first gas-liquid separator 3 for separating components, a condenser 4 for condensing and liquefying a high-temperature refrigerant vapor g ₁ guided from the first gas-liquid separator 3 during a cooling operation, and condensing by the condenser 4 a pressure reducing mechanism 5 for decompressing the liquefied refrigerant, the pressure reducing mechanism and an evaporator 6 for evaporating vaporizing the refrigerant decompressed by the 5, cryogen vapor g ₂ which is vaporized by the evaporator 6 The absorption heat exchanger 7 for recovering heat of absorption generated when is taken up in the absorption dilute solution l ₁ derived from the generator 2, air-cooled absorption to further absorb the refrigerant vapor into the solution derived from said absorber heat exchanger 7 And a concentrated solution 1 which is being guided from the air-cooled absorber 8 to the generator 2.
It is composed from said generator 2 to ₂ and a heat-recovery solution heat exchanger 9 for recovering heat held by the absorbing dilute solution l ₁ of the course to be guided to the absorber heat exchanger 7. Pump for code 10 for pumping the absorbent concentrated solution l _2, 11 is a pump 1
0 subcooler for subcooling the absorbent concentrated solution l ₂ in order to protect the, 12 is a pressure reducing mechanism for reducing the pressure of the absorption dilute solution l ₁ from the gas-liquid separator 3.

In this absorption refrigeration apparatus, the heat of the high-temperature refrigerant vapor g ₁ introduced from the gas-liquid separator 3 is transferred to the absorption concentrated solution introduced from the absorber 8 to the gas-liquid separator 3. l _{2 and} the heat recovery solution heat exchanger 9
Heat-recovery gas-liquid heat exchanger 13 for recovering the absorbent concentrated solution l ₂ to bypass is attached to.

Further, the second gas-liquid separator 14 for separating the absorbent component contained in the refrigerant vapor g ₁ derived from the heat recovery gas-liquid heat exchanger 13, the second gas-liquid separator A heat recovery steam heat exchanger 15 for recovering the heat retained by the refrigerant vapor g ₁ guided from the heat exchanger 14 into the refrigerant vapor g ₂ being guided to the absorption heat exchanger 7, and a heat recovery steam heat exchanger 15. a third gas-liquid separator 16 for separating the absorbent component contained in the refrigerant vapor g ₁ derived from is attached.

The condensates l ₃ and l ₄ containing a large amount of the absorbent component separated in the second gas-liquid separator 14 and the third gas-liquid separator 16 are joined to form the first gas-liquid separation. absorbing liquid derived from vessel 3 (i.e., absorption dilute solution of a high temperature) l ₁
To join. In other words, the condensates l ₃ and l ₄ merge with the high-temperature absorbing dilute solution l ₁ and are supplied to the heat recovery solution heat exchanger 9.

The absorption refrigeration system configured as described above operates as follows.

The thin absorbent liquid from a heated generator 2 of the high-temperature refrigerant vapor g ₁ and the refrigerant concentration by gas burner 1 (i.e., high temperature of the absorbent dilute solution l ₁₎ mixture of is made to occur, the first gas-liquid separator is separated into the high-temperature refrigerant vapor g ₁ hot and absorption dilute solution l ₁ in vessel 3. The thus obtained high-temperature refrigerant vapor g ₁ is supplied to the condenser 4 by external cooling substance (e.g., air or water) will be condensed and liquefied is cooled by, in the heat-recovery gas-liquid heat exchanger 13 before it Heat-exchanges with a part of the concentrated solution l ₂ led from the air-cooled absorber 8,
It contributes to the temperature rise of the concentrated solution l ₂ (that is, the amount of heat held by the high-temperature refrigerant vapor g ₁ is recovered by the concentrated solution l ₂ ) and is cooled by itself and absorbed in the second gas-liquid separator 14. The low temperature refrigerant vapor g ₂ guided from the evaporator 6 in the heat recovery vapor heat exchanger 15 is then separated.
A heat exchanger, itself is further cooled contributes to the temperature rise of the low-temperature refrigerant vapor g _2, absorber component is separated in a third gas-liquid separator 16. Thus, the purity of the refrigerant vapor g ₁ supplied to the condenser 4 becomes possible to greatly improve, it is unnecessary to cause a decrease in the refrigerating capacity.

The condensed liquids l ₃ and l ₄ containing a large amount of the absorbent component separated in the second and third gas-liquid separators 14 and 16 are absorbed by the first gas-liquid separator 3. after having been mixed with the dilute solution l _1, will be supplied to the heat recovery solution heat exchanger 9, condensate l _3, the enthalpy held by the l ₄ can be effectively utilized.

Further, the temperature of the low-temperature refrigerant vapor g ₂ supplied to the absorption heat exchanger 7 is determined by the heat recovery steam heat exchanger 15.
Is increased by heat exchange with the high-temperature refrigerant vapor g _{1 in the above,} and the absorption heat recovery in the absorption heat exchanger 7 is further improved.

By the above-described operation, the coefficient of performance (ie, COP) in the absorption refrigeration system is improved, and the running cost can be reduced.

On the other hand, the absorption dilute solution l ₁ separated in the first gas-liquid separator 3 is fed from the evaporator 6 is supplied to the absorber heat exchanger 7 through the heat-recovery solution heat exchanger 9 absorb cryogen vapor g _2.

[0026] are condensed in the condenser 4 as described above refrigerant, the low temperature refrigerant vapor g ₂ next is vaporized in the evaporator 6 after being decompressed by the decompression mechanism 5 by exchanging heat with indoor air, the aforementioned Is supplied to the absorption heat exchanger 7. Here, in the evaporator 6, the room air is cooled and provided for cooling.

In the absorption heat exchanger 7, the low-temperature refrigerant vapor g ₂ supplied from the evaporator 6 is supplied from the generator 2 via the heat recovery solution heat exchanger 9.
Absorbed by ₁ .

[0028] Since only the absorption heat exchanger 7 inadequate absorption into absorbent dilute solution l ₁ of the low-temperature refrigerant vapor g _2, air-cooled absorber the refrigerant vapor and absorption solution leaving the absorber heat exchanger 7 8
The feed, so as to obtain the concentrated solution l ₂ further performs the absorption of the refrigerant vapor.

[0029] After being completely liquefied by absorption of concentrated solution l ₂ are subcooler 11 exiting the air-cooled absorber 8, is sent to the absorption heat exchanger 7 by the pump 10, the heat of absorption is recovered as described above, Further, in the solution heat exchanger 9 for heat recovery and the gas-liquid heat exchanger 13 for heat recovery, heat is recovered from the high-temperature absorbing dilute solution l ₁ and the refrigerant vapor g _1, and thereafter, is returned to the generator 2.

Second Embodiment (Claims 1, 2, 5,
FIG. 2 illustrates a refrigerant circuit of an absorption refrigeration apparatus according to a second embodiment of the present invention.

In this case, after the condensed liquids l ₃ and l ₄ containing a large amount of the absorbent component separated in the second gas-liquid separator 14 and the third gas-liquid separator 16 are combined, the decompression mechanism 17 A sub-cooler 18 is provided for sub-cooling the condensed liquid refrigerant ₁₅ guided from the condenser 4 by evaporating under reduced pressure and generated cold. Refrigerant vapor g guided from the subcooler 18
₂ is to be supplied to the absorption heat exchanger 7 via the heat recovery steam heat exchanger 15 after merging with the low-temperature refrigerant vapor g ₂ guided from the evaporator 6. By doing so, the temperature of the condensed liquid refrigerant ₁₅ supplied to the evaporator 6 can be reduced, and the cooling capacity of the evaporator 6 can be improved. The other configuration and operation and effect are the same as those in the first embodiment, and the description is omitted.

Third Embodiment (Claims 1, 2, 5 to 8)
FIG. 3 shows a refrigerant circuit of an absorption refrigeration apparatus according to a third embodiment of the present invention.

In this case, a second subcooler 19 is provided in parallel with the subcooler 18 in the second embodiment,
Of the refrigerant vapor g ₂ guided from the evaporator 6 to the supercooler 19
And a part of the condensed liquid refrigerant ₁₅ guided from the condenser 4 is circulated in a heat-exchangeable manner. In this way, the temperature of the condensed liquid refrigerant ₁₅ supplied to the evaporator 6 can be lowered, so that the cooling capacity of the evaporator 6 is improved and the refrigerant vapor supplied to the absorption heat exchanger 7 from where it is possible to raise the temperature of g _2, also improves the absorption heat recovery in the absorber heat exchanger 7. The other configuration, operation, and effect are the same as those in the first and second embodiments, and thus description thereof is omitted.

In a CFC-based or ammonia-based absorption refrigeration system, a concentrated solution contains a large amount of chlorofluorocarbon or ammonia, and a dilute solution represents a solution containing a small amount of chlorofluorocarbon or ammonia. In the case of the apparatus, a concentrated solution contains a large amount of LiBr, and a dilute solution contains LBr.
Express a solution with low iBr.

[0035]

According to the invention of the present application (the invention of claim 1),
Is heated by the heating means 1, a generator 2 for generating a high-temperature refrigerant vapor g _1, the first gas-liquid separator for separating the absorbent component contained in the high-temperature refrigerant vapor g ₁ generated by the generator 2 3. High-temperature refrigerant vapor g introduced from the gas-liquid separator 3
A condenser 4 for condensing and liquefying a _1, a pressure reducing mechanism 5 for decompressing the refrigerant condensed and liquefied by the condenser 4, an evaporator 6 for evaporating vaporizing the reduced pressure refrigerant by the pressure reducing mechanism 5, the evaporator 6 the absorption heat exchanger 7 for recovering heat of absorption generated when absorbing a low-temperature refrigerant vapor g ₂ which is vaporized in the absorbing dilute solution l ₁ derived from the generator 2, the guide from the absorption heat exchanger 7 the absorber 8 to absorb absorbent concentrated solution l further refrigerant vapor g _{2 2} wither, the absorption heat exchanger from the generator 2 to the absorbent concentrated solution l ₂ of the course to be guided to the generator 2 from the absorber 8 in the absorption refrigerating apparatus that includes a heat-recovery solution heat exchanger 9 for recovering heat held by the absorbing dilute solution l ₁ of the middle led to 7, holding the hot refrigerant vapor g ₁ derived from the generator 2 Heat generated from the absorber 8 to the generator 2 A heat recovery air-liquid heat exchanger 13 which is a part of the liquid l ₂ recovered to absorb the concentrated solution l ₂ to bypass the heat recovery solution heat exchanger 9, heat recovery gas-liquid heat exchanger 13 second by attaching a gas-liquid separator 14 for separating the absorbent component contained in the refrigerant vapor g ₁ derived from, the absorbent component in the second gas-liquid separator 14 contained in the refrigerant vapor g ₁ Can be condensed and separated.
The purity of the refrigerant vapor g ₁ supplied becomes possible to improve the, there is excellent effect that a reduction in refrigerating capacity can be prevented. Moreover, it becomes possible amount of heat held by the high-temperature refrigerant vapor g ₁ derived from the generator 2 is collected in a part of the absorbent concentrated solution l ₂ is guided to the generator 2 from the absorber 8, that the heat recovery efficiency is efficiency There is also an effect.

As in the second aspect of the present invention, the second
When the condensate l ₃ containing a large amount of the absorbent component separated in the gas-liquid separator 14 is combined with the absorption dilute solution l ₁ supplied from the generator 2 to the solution heat exchanger 9 for heat recovery, enthalpy held by the condensate l ₃ containing a large amount of absorbent component can be effectively used.

As in the third aspect of the present invention, the second
The heat of the refrigerant vapor g ₁ guided from the gas-liquid separator 14 is transferred to the refrigerant vapor g ₂ on the way to the absorption heat exchanger 7.
A heat recovery steam heat exchanger 15 to recover, the annexed a third gas-liquid separator 16 for separating the absorbent component contained in the refrigerant vapor g ₁ derived from the heat recovery steam heat exchanger 15 In this case, the refrigerant vapor g ₁ guided from the second gas-liquid separator 14
Absorption agent component contained in the will be further condensed and separated, the purity of the refrigerant vapor g ₁ supplied to the condenser 4 is improved in. Moreover, the temperature of the cryogen vapor g ₂ to be supplied to the absorber heat exchanger 7, becomes possible is raised by heat exchange with the hot refrigerant vapor g ₁ in the heat-recovery steam heat exchanger 15, absorbing heat exchanger 7 The heat recovery in the process is further improved.

As in the fourth aspect of the present invention, the third
If the condensate l ₄ of the gas-liquid separator 16 containing a large amount of separated absorber component is combined into condensate l ₃ containing a large amount of absorbent component derived from said second gas-liquid separator 14,
The enthalpies of the condensates l ₃ and l ₄ containing a large amount of the absorbent component can be effectively used.

As in the fifth aspect of the present invention, the second
Of the gas-liquid separator 14 condensate l ₃ containing a large amount of separated absorber component is vacuum vaporized in, the subcooler 18 to the condensed liquid refrigerant l ₅ guided by cold heat generated from the condenser 4 to the supercooled as well as attached, if the refrigerant vapor g ₂ derived from supercooled 18 was fed to the absorber heat exchanger 7, from where it is possible to lower the temperature of the condensed liquid refrigerant l ₅ supplied to the evaporator 6 , together with the cooling capacity is improved in the evaporator 6, the temperature of the refrigerant vapor g ₂ to be supplied to the absorber heat exchanger 7 from where you can raise, also improved absorption heat recovery in the absorber heat exchanger 7.

As in the sixth aspect of the present invention, a second subcooler 19 is provided in parallel with the subcooler 18,
The subcooler 19, and a portion of the condensed liquid refrigerant l ₅ guided refrigerant vapor g ₂ derived from the evaporator 6 from the condenser 4 when is heat exchangeably circulation, the evaporator 6 Since the temperature of the supplied condensed liquid refrigerant ₁₅ can be further reduced, the cooling capacity of the evaporator 6 is further improved, and the refrigerant vapor g ₂ supplied to the absorption heat exchanger 7 is further increased.
Can be increased, so that the absorption heat recovery in the absorption heat exchanger 7 is also improved.

As in the seventh aspect of the present invention, the second
The heat of the refrigerant vapor g ₁ guided from the gas-liquid separator 14 is transferred to the refrigerant vapor g ₂ on the way to the absorption heat exchanger 7.
Attached a heat-recovery steam heat exchanger 15 to recover, and the third gas-liquid separator 16 for separating the absorbent component contained in the refrigerant vapor g ₁ derived from the heat recovery steam heat exchanger 15 in , The refrigerant vapor g guided from the second gas-liquid separator 14
It becomes the absorbent component contained in ₁ is further condensed and separated, the purity of the refrigerant vapor g ₁ supplied to the condenser 4 is improved. Moreover, the temperature of the cryogen vapor g ₂ to be supplied to the absorber heat exchanger 7, becomes possible is raised by heat exchange with the hot refrigerant vapor g ₁ in the heat-recovery steam heat exchanger 15, absorbing heat exchanger 7 The heat recovery in the process is further improved.

As in the eighth aspect of the present invention, the third
If the condensate l ₄ of the gas-liquid separator 16 containing a large amount of separated absorber component is combined into condensate l ₃ containing a large amount of absorbent component derived from said second gas-liquid separator 14,
From where it is possible to reduce further the temperature of the condensed refrigerant l ₅ supplied to the evaporator 6, the cooling capacity is further improved in the evaporator 6, the temperature of the refrigerant vapor g ₂ to be supplied to the absorber heat exchanger 7 Can be raised, so that the absorption heat recovery in the absorption heat exchanger 7 is also improved.

[Brief description of the drawings]

FIG. 1 is a refrigerant circuit diagram of an absorption refrigeration apparatus according to a first embodiment of the present invention.

FIG. 2 is a refrigerant circuit diagram of an absorption refrigeration apparatus according to a second embodiment of the present invention.

FIG. 3 is a refrigerant circuit diagram of an absorption refrigeration apparatus according to a third embodiment of the present invention.

FIG. 4 is a refrigerant circuit diagram of a conventional absorption refrigeration apparatus.

[Explanation of symbols]

1 is a heating means (gas burner), 2 is a generator, 3 is a first gas-liquid separator, 4 is a condenser, 5 is a decompression mechanism, 6 is an evaporator,
7 is an absorption heat exchanger, 8 is an absorber (air-cooled absorber), 9 is a solution heat exchanger for heat recovery, 13 is a gas-liquid heat exchanger for heat recovery, 1
4 is a second gas-liquid separator, 15 is a steam heat exchanger for heat recovery,
16 a third gas-liquid separator, the pressure reducing mechanism 17, 18 subcooler, a second subcooler 19, g ₁ is the high-temperature refrigerant vapor, g ₂
Is a low-temperature refrigerant vapor, l ₁ is an absorption dilute solution, l ₂ is an absorption concentrated solution,
l ₃ and l ₄ are condensed liquids, and l ₅ is a condensed liquid refrigerant.

Claims (8)

[Claims] 1. A is heated by a heating means (1), the high-temperature refrigerant vapor (g ₁₎ generator for generating a (2), the hot refrigerant vapor (g ₁₎ which is generated by the generator (2) A first gas-liquid separator (3) for separating contained absorbent components;
High-temperature refrigerant vapor (g ₁ ) guided from the gas-liquid separator (3)
(4) for condensing and liquefying the refrigerant, a decompression mechanism (5) for decompressing the refrigerant condensed and liquefied by the condenser (4), and an evaporator for evaporating the refrigerant decompressed by the decompression mechanism (5) (6) and absorption heat generated when the low-temperature refrigerant vapor (g ₂ ) vaporized and vaporized by the evaporator (6) is absorbed by the absorbing dilute solution (l ₁ ) led from the generator (2). An absorption heat exchanger (7) to be recovered, an absorber (8) for further absorbing a refrigerant vapor (g ₂ ) into a solution led from the absorption heat exchanger (7), and the generation from the absorber (8). The heat retained by the absorbing dilute solution (l ₁ ) on the way from the generator (2) to the absorption heat exchanger (7) is recovered into the absorbing concentrated solution (l ₂ ) on the way to the vessel (2). An absorption refrigeration system comprising a heat recovery solution heat exchanger (9), which is guided by said generator (2). Heat the absorber held in the high-temperature refrigerant vapor (g ₁₎ (8) the generator (2) absorbing dark led to the solution (l ₂₎ the heat recovery solution heat exchanger a part of the ( The gas-liquid heat exchanger (13) for heat recovery for recovering the concentrated solution (l ₂ ) bypassing 9) and the refrigerant vapor (g ₁ ) led from the gas-liquid heat exchanger (13) for heat recovery An absorption refrigeration apparatus, further comprising a second gas-liquid separator (14) for separating contained absorbent components. 2. A heat recovery solution heat exchanger (1) from the generator (2) with a refrigerant condensate (l ₃ ) containing a large amount of absorbent component separated in the second gas-liquid separator (14). 9)
2. The absorption refrigeration apparatus according to claim 1, wherein the absorption refrigeration apparatus is joined to the absorption dilute solution (l ₁ ) supplied to the apparatus. 3. The heat of the refrigerant vapor (g ₁ ) guided from the second gas-liquid separator (14) is transferred to the refrigerant vapor (g ₂ ) on the way to the absorption heat exchanger (7). A heat recovery steam heat exchanger (15) to be recovered, and a third gas-liquid separation for separating the absorbent component contained in the refrigerant vapor (g ₁ ) guided from the heat recovery steam heat exchanger (15) 3. The absorption refrigeration system according to claim 1, further comprising a vessel (16). 4. An absorbent component derived from the second gas-liquid separator (14) with the condensate (l ₄ ) containing a large amount of the absorbent component separated in the third gas-liquid separator (16). 4. The absorption refrigeration system according to claim 3, wherein the condensate (l ₃ ) containing a large amount of is combined. 5. A condensate (l ₃ ) containing a large amount of an absorbent component separated in the second gas-liquid separator (14) is vaporized under reduced pressure, and is led from the condenser (4) by generated cold heat. A subcooler (18) for subcooling the condensed liquid refrigerant (l ₅ )
_2. The absorption refrigeration system according to claim 1, wherein refrigerant vapor (g ₂ ) led from the subcooler (18) is supplied to the absorption heat exchanger (7). 3. 6. A second subcooler (19) is provided in parallel with the subcooler (18), and the second subcooler (19) is guided from the evaporator (6). 6. The absorption refrigeration system according to claim 5, wherein the refrigerant vapor (g ₂ ) and a part of the condensed liquid refrigerant (l ₅ ) led from the condenser (4) are circulated in a heat-exchangeable manner. . 7. The heat of the refrigerant vapor (g ₁ ) guided from the second gas-liquid separator (14) is transferred to the refrigerant vapor (g ₂ ) on the way to the absorption heat exchanger (7). A heat recovery steam heat exchanger (15) to be recovered, and a third gas-liquid separation for separating the absorbent component contained in the refrigerant vapor (g ₁ ) guided from the heat recovery steam heat exchanger (15) The absorption refrigeration apparatus according to any one of claims 5 and 6, further comprising a vessel (16). 8. An absorbent component derived from the second gas-liquid separator (14) with a condensate (l ₄ ) containing a large amount of the absorbent component separated in the third gas-liquid separator (16). 8. The absorption refrigeration system according to claim 7, wherein the refrigeration system is combined with a condensate (l ₃ ) containing a large amount of.