KR20220125561A - Absorption type cooler - Google Patents

Abstract

The problem to be solved by the present invention is to increase the regeneration performance by lowering the temperature and concentration of absorption liquid flowing from a high-temperature regenerator to a low-temperature regenerator. According to the present invention, an absorption chiller comprises: an evaporator to evaporate a refrigerant; an absorber for absorbing the refrigerant evaporated in the evaporator into the absorption liquid; a regenerator for regenerating the absorption liquid that has absorbed the refrigerant in the absorber; and a condenser condensing the refrigerant separated from the absorption liquid in the regenerator. The regenerator includes a first regenerator for regenerating the absorption liquid discharged into the absorber, and a second regenerator for regenerating the absorption liquid regenerated in the first regenerator, and further includes an absorbent liquid branch pipe for supplying a part of the absorption liquid discharged from the absorber to the second regenerator.

Description

Absorption type cooler

The present invention relates to a regenerator and an absorption refrigerator including the same, and more particularly, to an absorption refrigerator for improving efficiency.

An absorption refrigerator is a device that can perform cooling or heating by operating a cycle consisting of an absorption solution and a refrigerant by using fuel such as oil or gas as an energy source.

The absorption type refrigerator uses the principle that the refrigerant evaporated in the evaporator is absorbed by the absorbent in the absorber, the refrigerant is evaporated while the absorbent liquid that has absorbed the refrigerant passes through the regenerator, and the refrigerant evaporated through the condenser is condensed, cooling or heating can be performed. Absorption refrigerators can be classified into single-effect, double-effect, triple-effect and more depending on the number of regenerators, and the double-effect system is commonly used.

The conventional absorption refrigerator uses a high-temperature regenerator and a low-temperature regenerator, and includes a heat exchanger for exchanging an absorption liquid discharged from the absorber with a refrigerant discharged from the high-temperature regenerator. In this case, there is a problem in that the regeneration efficiency is lowered in each regenerator, and ultimately the efficiency of the entire system is lowered.

KR 10-1997-0028253 (Published date: June 24, 1997) Title of invention: absorption chiller

The problem to be solved by the present invention is to increase the regeneration performance by lowering the temperature and concentration of the absorption liquid flowing from the high-temperature regenerator to the low-temperature regenerator.

In addition, the problem to be solved by the present invention is to increase the regeneration performance by lowering the temperature and concentration of the absorbent liquid flowing from the high-temperature regenerator to the medium-temperature regenerator and the absorbent liquid flowing from the medium-temperature regenerator to the low-temperature regenerator.

In addition, the problem to be solved by the present invention is to prevent the cold water pipe from being ruptured due to supercooling of the cold water when the cold water is cut off.

In addition, an object of the present invention is to provide an absorption refrigerator in which at least a portion of the refrigerant of the regenerator is automatically supplied to an evaporator or an absorber when a cold water level is detected.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

The absorption refrigerator according to an embodiment of the present invention for achieving the above object is characterized in that a part of the absorption liquid discharged from the absorber is mixed with the absorption liquid flowing from the high-temperature regenerator to the low-temperature regenerator.

Specifically, the present invention relates to an evaporator for evaporating a refrigerant, an absorber for absorbing the refrigerant evaporated in the evaporator into an absorption liquid, a regenerator in which the absorbent liquid that has absorbed the refrigerant in the absorber is regenerated, and the refrigerant separated from the absorption liquid in the regenerator is condensed and a condenser comprising: a first regenerator for regenerating the absorbent liquid discharged to the absorber; and a second regenerator for regenerating the absorbent liquid regenerated in the first regenerator; It characterized in that it further comprises an absorption liquid branch pipe for supplying a part of the absorption liquid to the second regenerator.

The first regenerator may regenerate the absorbent liquid at a higher temperature than the second regenerator.

It may further include an absorption liquid opening/closing valve for opening and closing the absorption liquid branch pipe.

One end of the absorption liquid branch pipe may be connected to a pipe connecting the absorber and the first regenerator, and the other end of the absorbent liquid branch pipe may be connected to a pipe connecting the first regenerator and the second regenerator.

and a heat exchanger for exchanging heat between the absorbent liquid discharged from the absorber and the absorbent liquid regenerated by the first regenerator.

One end of the absorption liquid branch pipe may be connected to a pipe connecting the absorber and the heat exchanger, and the other end of the absorption liquid branch pipe may be connected to a pipe connecting the heat exchanger and the second regenerator.

In addition, the present invention may further include a cold water line for supplying cold water to the evaporator, a freeze prevention pipe for supplying at least a portion of the refrigerant discharged from the regenerator to the evaporator, and a freeze on/off valve for opening and closing the freeze prevention pipe. .

One end of the freezing equipment pipe may be connected to a pipe connecting the regenerator and the condenser, and the other end of the freezing prevention pipe may be connected to a pipe connecting the evaporator and the condenser.

In addition, the present invention provides an evaporator for evaporating a refrigerant, an absorber for absorbing the refrigerant evaporated in the evaporator into an absorption liquid, a regenerator in which the absorbent liquid that has absorbed the refrigerant in the absorber is regenerated, and condensing the refrigerant separated from the absorption liquid in the regenerator and a condenser, wherein the regenerator comprises: a first regenerator for regenerating the absorbent liquid discharged to the absorber; a second regenerator for regenerating the absorbent liquid regenerated in the first regenerator; a third regenerator for regenerating It may further include a second absorbent liquid branch pipe.

The first regenerator may regenerate the absorbent liquid at a higher temperature than the second regenerator, and the second regenerator may regenerate the absorbent liquid at a higher temperature than the third regenerator.

In addition, the present invention may further include a first absorbent liquid on-off valve for opening and closing the first absorbent liquid branch pipe and a second absorbent liquid on-off valve for opening and closing the second absorbent liquid branch pipe.

In addition, the present invention provides a first heat exchanger for exchanging heat between the absorbent liquid discharged from the absorber and the absorbent liquid regenerated in the second regenerator, and the absorbent liquid discharged from the first heat exchanger and the absorbent liquid regenerated by the first regenerator. It may further include; a second heat exchanger for heat exchange.

One end of the first absorbent liquid branch pipe may be connected to a pipe connecting the absorber and the first heat exchanger, and the other end of the first absorbent liquid branch pipe may be connected to a pipe connecting the first heat exchanger and the third regenerator. .

One end of the second absorption liquid branch pipe may be connected to a pipe connecting the first heat exchanger and the second heat exchanger, and the other end of the second absorption liquid branch pipe may be connected to the first heat exchanger and the second regenerator.

The refrigerant may form a first cycle circulating the absorber, the first regenerator, the second regenerator and the third regenerator.

The details of other embodiments are included in the detailed description and drawings.

According to the present invention, there are the following effects.

The present invention has the advantage of improving the regeneration performance by lowering the temperature and concentration of the absorption liquid flowing into the low-temperature regenerator from the high-temperature regenerator, and increasing the efficiency of the absorption chiller.

In addition, the present invention has the advantage of improving regeneration performance and increasing the efficiency of the absorption chiller by lowering the temperature and concentration of the absorbent liquid flowing from the high-temperature regenerator to the medium-temperature regenerator and the absorbent liquid flowing from the intermediate-temperature regenerator to the low-temperature regenerator.

According to the present invention, the hot refrigerant of the regenerator is supplied to the absorber or the evaporator to prevent overcooling of the evaporator when the cold water is cut off.

In addition, the present invention detects a power cut of the cold water and automatically supplies the refrigerant of the regenerator to the evaporator or absorber, so that damage to the evaporator and freezing of the cold water that occur when the cold water is cut off can be prevented without user control.

In the present invention, by adding the configuration of the auxiliary absorber and the auxiliary regenerator, a cycle in which the absorbent liquid circulates through the auxiliary absorber and the auxiliary regenerator is additionally formed, so that two cycles can be simultaneously formed or only one cycle can be formed.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the description of the claims.

1 is a view showing the configuration of an absorption refrigerator according to an embodiment of the present invention.
2 is a view when the absorption chiller according to the embodiment of the present invention is operated under a full cooling load.
Fig. 3 is an enlarged view of a portion X of Fig. 2;
4 is a view when the absorption chiller according to the embodiment of the present invention is operated with a partial cooling load.
Fig. 5 is an enlarged view of a portion X of Fig. 4;
6 is a view showing the configuration of an absorption refrigerator according to another embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Regardless of the reference numerals, the same or similar components are assigned the same reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "module" and "part" for components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have distinct meanings or roles by themselves. Accordingly, the terms “module” and “unit” may be used interchangeably.

In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprises” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

1 is a view showing the configuration of an absorption refrigerator according to an embodiment of the present invention.

Referring to FIG. 1 , the absorption refrigerator according to the present invention may be a two-stage absorption refrigerator. The absorption chiller includes an evaporator (1), an absorber (10), a regenerator, a condenser (40), a freeze prevention pipe, and a freeze on/off valve.

The absorption refrigerator according to another embodiment of the present invention may be a two-stage absorption refrigerator. The absorption chiller includes an evaporator (1), an absorber (10), a first regenerator (20), a second regenerator (30), a condenser (40), an auxiliary absorber (50), an auxiliary regenerator (60), and a high-temperature heat exchanger (70) and a low-temperature heat exchanger 80 and an auxiliary heat exchanger 90 .

The absorption chiller may be provided in the first shell 2 in which the evaporator 1 and the absorber 10 are one shell so that the refrigerant evaporated in the evaporator 1 flows to the absorber 10 easily. The interior of the first shell 2 may include an evaporation area in which the liquid refrigerant is evaporated by heat exchange with cold water, and an absorption area in which the gaseous refrigerant moved from the evaporation area is absorbed by the absorption liquid. A first eliminator 4 may be disposed inside the shell 2 to partition an evaporation area and an absorption area, and through which gaseous refrigerant in the evaporation area flows into the absorption area.

The evaporator 1 includes a refrigerant injector 6 for injecting a refrigerant to the evaporation region, and a cold water pipe 7 located in the vaporization region and through which cold water exchanged heat with the gaseous refrigerant sprayed from the refrigerant injector 6 passes.

The absorption chiller may further include a cold water line 5 for supplying cold water F to the evaporator 1 . The cold water line 5 may be connected to the evaporator 1 , in particular a cold water pipe 7 . The cold water line 5 is connected to the cold water pipe 7 of the evaporator 1, and cold water (for example, a temperature of 13° C.) is obtained through the cold water pipe 7 of the evaporator 1, a cold water line 5A and , connected to the cold water pipe 7 of the evaporator 1 to guide the cold water discharged from the cold water pipe 7 of the evaporator 1 (eg, 8 ° C.) may include a cold water outlet line 5B. .

The cold water flowing into the cold water pipe 7 of the evaporator 1 through the cold water line 5A may exchange heat with the refrigerant of the evaporator 1 , and may be cooled by losing heat to the refrigerant of the evaporator 1 . The cold water cooled by the evaporator 1 as described above may flow to the cold water export line 5B. The cold water F flowing to the cold water export line 5B may be supplied to a cold water demanding destination (eg, a building, etc.) to cool the cold water demanding destination.

The evaporator 1 may further include a pumping passage 8 for guiding the liquid refrigerant that has fallen to the lower part of the evaporation region to the refrigerant injector 6 and a refrigerant pump 9 installed in the pumping passage 8 . The refrigerant injected from the refrigerant injector (6) to the evaporation region is heat-exchanged with the cold water pipe (7) and is changed to a gaseous refrigerant while taking heat from the cold water pipe (7), and this gaseous refrigerant is transferred to the first eliminator (4) It can pass through and move to the absorption zone.

The absorber 10 absorbs the vapor-phase refrigerant evaporated in the evaporator 1 into the absorption liquid, and includes an absorption liquid injector 16 that sprays the absorption liquid into the absorption region, and a cooling water pipe 17 located in the absorption region and through which the coolant passes. include

The gas-phase refrigerant moved from the evaporation region to the absorption region may be absorbed by the absorption liquid sprayed from the absorption liquid injector 16 , and heat generated when the gas-phase refrigerant is absorbed into the absorption liquid passes through the cooling water pipe 17 of the absorber 10 . can be transferred to the cooling water.

The regenerator regenerates the absorbent liquid that has absorbed the refrigerant in the absorber. The regenerator is a first regenerator 20 in which the absorbent liquid that has absorbed the refrigerant in the absorber is primarily regenerated, and a second regenerator in which the absorbent liquid regenerated in the first regenerator 20 is regenerated again. It may include a regenerator 30 . The ash regenerator can be operated at a higher temperature than the ash regenerator.

The absorbent liquid C sprayed from the absorbent liquid injector 16 may absorb the gaseous refrigerant in the absorption region and be changed into a dilute solution, and then move to the first regenerator 20 and primary separation from the refrigerant in the first regenerator 20 . can be

The absorption refrigerator includes a first regenerator 20 and an auxiliary regenerator 60 so that the refrigerant separated from the absorption liquid in the first regenerator 20 and the refrigerant separated from the auxiliary absorption liquid in the auxiliary regenerator 60 easily flow to the condenser 40 and The condenser 40 may be provided in the second shell 22 which is one shell.

In detail, inside the second shell 22, a first regenerator ( 20), the auxiliary regenerator 60 disposed in the auxiliary regeneration area where the dilute solution absorbing the refrigerant in the auxiliary absorber 50 is heat-exchanged with hot water to evaporate the refrigerant into a concentrated solution, and the first regeneration area A condenser 40 disposed in the condensing area in which the gaseous refrigerant and the gaseous refrigerant moved from the auxiliary regeneration area are condensed by the cooling water may be provided. A second eliminator 24 may be disposed inside the second shell 22 to partition the condensation region from the first regeneration region and the auxiliary regeneration region, and through which gaseous refrigerant flows into the condensation region.

The first regenerator 20 includes an absorption liquid injector 26 through which an absorption liquid (C) in a dilute solution state, which has absorbed the refrigerant in the absorber 10, is injected into the first regeneration area, and a hot water pipe 27 through which hot water passes. can do.

The absorption chiller may be provided in a third shell 32 in which the second regenerator 30 and the auxiliary absorber 50 are one shell so that the refrigerant evaporated in the second regenerator 30 easily flows into the auxiliary absorber 50 . have.

Inside the third shell 32, the absorbent liquid firstly separated from the refrigerant in the first regenerator 20 is heat-exchanged with hot water to evaporate the refrigerant secondarily and secondarily to the second regeneration area which is changed into a concentrated solution. The regenerator 30 and the auxiliary absorber 50 disposed in the auxiliary absorption area in which the auxiliary absorption liquid (D) separated from the refrigerant in the auxiliary regenerator 60 absorbs the vapor phase refrigerant evaporated in the second regeneration area may be provided. . In detail, the second regenerator 30 may be disposed on the inner upper portion of the third shell 32 , and the auxiliary absorber 50 may be disposed on the inner lower portion of the third shell 32 . Through this, the vapor phase refrigerant evaporated from the second regenerator 30 may be absorbed in the auxiliary absorption liquid of the auxiliary absorber 50 .

The absorbent liquid receiver 33 containing the absorbent liquid C changed to the concentrated liquid in the second regeneration region may be installed inside the third shell 32 .

The second regenerator 30 includes a second absorption liquid injector 36 through which the absorbent liquid that is primarily separated from the refrigerant in the first regenerator 20 is sprayed, and hot water for heat exchange between the absorbent liquid sprayed from the second absorption liquid injector 36 and heat exchange. It may include a hot water pipe 37 flowing therein.

The condenser 40 condenses the refrigerant separated from the absorption liquid in the regenerator. The condenser 40 may include a cooling water pipe 47 in which the gaseous refrigerant moved from the first regenerator 20 and the gaseous refrigerant moved from the auxiliary regenerator 30 are heat exchanged.

The auxiliary absorber 50 includes an auxiliary absorption liquid injector 56 through which the auxiliary absorption liquid D is injected into the auxiliary absorption region, and a cooling water pipe 57 through which the cooling water passes.

The gaseous refrigerant evaporated in the second regenerator 50 and then moved to the auxiliary absorption region may be absorbed by the auxiliary absorption liquid D sprayed from the auxiliary absorption liquid injector 56 , and the auxiliary absorption liquid injected from the auxiliary absorption liquid injector 56 . (D) may be diluted by absorbing the gaseous refrigerant, and the heat generated when the gaseous refrigerant is absorbed in the auxiliary absorption liquid (D) may be transferred to the cooling water passing through the cooling water pipe 57 of the auxiliary absorber 50. .

Meanwhile, the auxiliary absorber 50 may further include a gaseous refrigerant inlet 58 into which the gaseous refrigerant flowing from the flash tank 200 to be described later is introduced. The gaseous refrigerant inlet 58 may be formed in the third shell 32 , and may be formed at a position of the auxiliary absorption region among the third shell 32 .

In addition, the auxiliary absorption liquid D diluted by absorbing the gaseous refrigerant in the auxiliary absorber 50 may move to the auxiliary regeneration area. In this case, the auxiliary regenerator 60 includes an auxiliary absorption liquid injector 66 for spraying the auxiliary dilute solution D, which has absorbed the gaseous refrigerant in the auxiliary absorber 50, to the auxiliary regeneration area, and a hot water pipe 67 through which the hot water passes. may include

The heat exchanger exchanges heat with the absorbent liquid discharged from the absorber (10) and the absorbent liquid regenerated by the first regenerator (20). A plurality of heat exchangers may be provided. For example, the heat exchanger may include a high-temperature heat exchanger 70 and a low-temperature heat exchanger 80 .

The high-temperature heat exchanger 70 includes a third flow path 71 through which the dilute solution flowing in a first flow path 81 to be described later of the low-temperature heat exchanger 80 passes, and a concentrated solution flowing in the first regenerator 20 . It may include a fourth flow path 72 passing therethrough. The dilute solution passing through the third flow path 71 and the concentrated solution passing through the fourth flow path 72 may exchange heat with each other in the high-temperature heat exchanger 70 .

The low-temperature heat exchanger 80 may include a first flow path 81 through which the dilute solution flowed from the absorber 10 passes, and a second flow path 82 through which the concentrated solution flowed from the second regenerator 30 passes. can The dilute solution passing through the first flow path 81 and the concentrated solution passing through the second flow path 82 may exchange heat with each other in the low-temperature heat exchanger 80 .

The auxiliary heat exchanger 90 may include a fifth flow path 91 through which the dilute solution flowing from the auxiliary absorber 50 passes, and a sixth flow path 92 through which the concentrated solution flowing from the auxiliary regenerator 60 passes. can The dilute solution passing through the fifth flow path 91 may exchange heat with the concentrated solution passing through the sixth flow path 92 in the auxiliary heat exchanger 90 .

The absorption chiller further includes a refrigerant line 100 , a cooling water line 110 , a first absorption liquid line 120 , a second absorption liquid line 130 , a hot water line 150 , and a bypass passage 301 . can do.

The refrigerant line 100 may guide the refrigerant A so that the refrigerant A passes from the condenser 40 to the evaporator 1 in order. A flash tank 200 to be described later may be installed in the refrigerant line 100 , and the flash tank 200 may constitute a part of the refrigerant line 100 .

Specifically, the refrigerant line 100 includes a flash tank inlet line 102 between the condenser 40 and the flash tank 200 and a flash tank outlet line 104 between the flash tank 200 and the evaporator 1 . can do.

The flash tank inlet line 102 may have one end connected to the condenser 40 , particularly the second shell 22 , which is a shell constituting the condenser 40 , and the other end may be connected to the flash tank 200 .

One end of the flash tank outlet line 104 may be connected to the flash tank 200, and the other end of the evaporator 1, in particular, is a shell constituting the evaporator 1, at least of the first shell 2 and the pumping line 8. can be connected to one.

The cooling water line 110 may be connected so that the cooling water B passes through the absorber 10 , the auxiliary absorber 50 , and the condenser 40 in this order. The cooling water line 110 may include a cooling water inlet line 111 connected to the cooling water pipe 17 of the absorber 10 to guide the cooling water to the cooling water pipe 17 of the absorber 10 .

The cooling water line 110 is connected to the cooling water pipe 17 of the absorber 10 and the cooling water pipe 57 of the auxiliary absorber 50, so that the cooling water passing through the cooling water pipe 17 of the absorber 10 is the auxiliary absorber 50 ) may further include an absorber-auxiliary absorber connection line 112 guided to the cooling water pipe 57 .

In addition, the cooling water line 110 is connected to the cooling water pipe 57 of the auxiliary absorber 50 and the cooling water pipe 47 of the condenser 40 so that the cooling water passing through the cooling water pipe 57 of the auxiliary absorber 50 is condenser The auxiliary absorber guided to the cooling water pipe 47 of the 40-condenser connection line 113 may be further included.

In addition, the cooling water line 110 is connected to the cooling water pipe 47 of the condenser 40, and the cooling water passing through the cooling water pipe 47 of the condenser 40 is discharged to the outside. can

In the first absorption liquid line 120, the absorption liquid C is divided into the absorber 10, the low-temperature heat exchanger 80, the high-temperature heat exchanger 70, the first regenerator 20, the high-temperature heat exchanger 70, and the second regenerator ( 50), the low-temperature heat exchanger 80, and the absorber 10 may be cyclically connected in order.

The first absorption liquid line 120 is connected to the first flow path 81 of the absorber 10 and the low-temperature heat exchanger 80 so that the absorbent liquid absorbing the refrigerant in the absorber 10 is transferred to the first flow path of the low-temperature heat exchanger 80 . It may include an absorber-low temperature heat exchanger connecting line 121 guided to (81). A first pump 19 may be installed in the absorber-low temperature heat exchanger connection line 121 .

In addition, the first absorption liquid line 120 is connected to the first flow path 81 of the low-temperature heat exchanger 80 and the third flow path 71 of the high-temperature heat exchanger 70 , and the first flow path of the low-temperature heat exchanger 80 . A low-temperature heat exchanger-high-temperature heat exchanger connection line 122 through which the absorption liquid having passed through 81 is guided to the third flow path 71 of the high-temperature heat exchanger 70 may be further included.

In addition, the first absorption liquid line 120 is connected to the third passage 71 of the high temperature heat exchanger 70 and the absorption liquid injector 26 of the first regenerator 20, and the third passage of the high temperature heat exchanger 70 ( 71) may further include a high-temperature heat exchanger-first regenerator connecting line 123 in which the absorbent liquid is guided to the absorbent liquid injector 26 of the first regenerator 20.

In addition, the first absorption liquid line 120 is connected to the fourth flow path 72 of the first regenerator 20 and the high-temperature heat exchanger 70 so that the absorption liquid first separated from the refrigerant in the first regenerator 20 is subjected to high-temperature heat exchange. A first regenerator-high temperature heat exchanger connection line 124 guided to the fourth flow path 72 of the unit 70 may be further included. A second pump 29 may be installed in the first regenerator-high temperature heat exchanger connection line 124 .

In addition, the first absorption liquid line 120 is connected to the fourth passage 72 of the high temperature heat exchanger 70 and the absorption liquid injector 36 of the second regenerator 30, and the fourth passage 72 of the high temperature heat exchanger (70). It may further include a high-temperature heat exchanger-second regenerator connection line 125 in which the absorbent liquid passing through is guided to the absorbent liquid injector 36 of the second regenerator 30 .

In addition, the first absorption liquid line 120 is connected to the absorption liquid receiver 33 of the second regenerator 30 and the second flow passage 82 of the low-temperature heat exchanger 80 , and the absorption liquid receiver 33 of the second regenerator 30 . ) may further include a second regenerator-low-temperature heat exchanger connection line 126 through which the absorption liquid accommodated in the low-temperature heat exchanger 80 is guided to the second flow path 82 of the low-temperature heat exchanger 80 . A third pump 39 may be installed in the second regenerator-low temperature heat exchanger connection line 126 .

In addition, the first absorption liquid line 120 is connected to the second passage 82 of the low-temperature heat exchanger 80 and the absorption liquid injector 16 of the absorber 10, and the second passage 82 of the low-temperature heat exchanger 80 . It may further include a low-temperature heat exchanger-absorber connection line 127 in which the absorbent liquid passing through is guided to the absorbent liquid injector 16 of the absorber 10 .

The second absorption liquid line 130 is such that the auxiliary absorption liquid (D) is circulated in order to the auxiliary absorber 50 , the auxiliary heat exchanger 90 , the auxiliary regenerator 40 , the auxiliary heat exchanger 90 and the auxiliary absorber 10 . can be connected

The second absorption liquid line 130 is connected to the fifth flow path 91 of the auxiliary absorber 50 and the auxiliary heat exchanger 90 so that the auxiliary absorption liquid absorbing the gaseous refrigerant in the auxiliary absorber 50 is transferred to the auxiliary heat exchanger 90 . It may include an auxiliary absorber-auxiliary heat exchanger connection line 131 guided to the fifth flow path 91 of the . A fourth pump 59 may be installed in the auxiliary absorber-auxiliary heat exchanger connection line 131 .

In addition, the second absorption liquid line 130 is connected to the fifth passage 91 of the auxiliary heat exchanger 90 and the auxiliary absorption liquid injector 66 of the auxiliary regenerator 60, and the fifth passage of the auxiliary heat exchanger 90 ( An auxiliary heat exchanger-auxiliary regenerator connection line 132 through which the auxiliary absorption liquid passing through 91 is guided to the absorption liquid injector 66 of the auxiliary regenerator 60 may be further included.

In addition, in the second absorption liquid line 130 , the auxiliary regenerator 60 and the auxiliary absorption liquid are connected to the sixth flow path 92 of the auxiliary heat exchanger 90 , so that the auxiliary absorption liquid obtained by evaporating the gaseous refrigerant in the auxiliary regenerator 60 is auxiliary. The auxiliary regenerator-auxiliary heat exchanger connection line 133 guided to the sixth flow path 92 of the heat exchanger 90 may be further included.

In addition, the second absorption liquid line 130 is connected to the sixth passage 92 of the auxiliary heat exchanger 90 and the absorption liquid injector 56 of the auxiliary absorber 50 , and the sixth passage 92 of the auxiliary heat exchanger 90 . ) may further include an auxiliary heat exchanger-auxiliary absorber connection line 134 in which the auxiliary absorption liquid passing through is guided to the absorption liquid injector 56 of the auxiliary absorber 50 .

The hot water line 150 may be connected so that the hot water E passes through the first regenerator 20 , the auxiliary regenerator 40 , and the second regenerator 50 in this order.

The hot water line 150 may include a hot water inlet line 151 connected to the hot water pipe 27 of the first regenerator 20 to guide hot water to the hot water pipe 27 of the first regenerator 20 . The hot water received through the hot water inlet line 151 may be hot water supplied from a hot water supply source (district heating corporation, etc.).

In addition, the hot water line 150 is connected to the hot water pipe 27 of the first regenerator 20 and the hot water pipe 67 of the auxiliary regenerator 60 to pass through the hot water pipe 27 of the first regenerator 20 . It may further include a first regenerator-auxiliary regenerator connection line 152 for guiding the hot water to the hot water pipe 67 of the auxiliary regenerator 60 .

In addition, the hot water line 150 is connected to the hot water pipe 67 of the auxiliary regenerator 60 and the hot water pipe 37 of the second regenerator 30 , and the hot water passing through the hot water pipe 67 of the auxiliary regenerator 60 . It may further include an auxiliary regenerator-second regenerator connection line 153 for selectively guiding the to the hot water pipe 37 of the second regenerator 30 .

In addition, the hot water line 150 is connected to the hot water pipe 37 of the second regenerator 30, and a hot water outlet line 154 that discharges the hot water passing through the hot water pipe 37 of the second regenerator 30 to the outside. may further include.

In addition, the hot water line 150 may include a bypass flow path 301 to selectively convert the hot water inflow into the second regenerator 30 .

In detail, the bypass flow path 301 is arranged to connect the auxiliary regenerator-regenerator connection line 153 and the hot water outlet line 154 of the hot water line 150 to each other, so that the auxiliary regenerator-regeneration is connected to the hot water from the connection line 154 . It is possible to selectively flow hot water to the water outlet line 154 .

In addition, the hot water conversion valve 300 may be disposed in the bypass flow path 301 . The hot water conversion valve 300 is a valve capable of controlling the flow of hot water so that the hot water can selectively flow through the bypass flow path 301 .

In detail, the hot water conversion valve 300 may be a three-way valve having three input and output portions. In more detail, when there is a flow of the auxiliary absorption liquid in the auxiliary absorber-auxiliary heat exchanger connection line 131, the three input and output portions formed in the hot water conversion valve 300 pass through the hot water pipe 37 of the second regenerator 30. A first inlet and outlet 300a through which one hot water can be introduced, a second inlet and outlet connected to the hot water outlet line 154 to guide the hot water passing through the first inlet and outlet 300a to the hot water outlet line 154 ( 300c) and when there is no flow of the auxiliary absorption liquid in the auxiliary absorber-auxiliary heat exchanger connection line 131 , the third inlet and outlet 300b through which hot water flows through the bypass passage 301 without going through the second regenerator 30 . ) may be included.

The flow of hot water according to the operation of the hot water conversion valve 300 will be described in detail. In a state in which the hot water conversion valve 300 is turned off, that is, the third input/output part 300b is closed, and the first input/output part 300a and the second input/output part 300c are open, The hot water flowing through the auxiliary regenerator-regenerator connection line 153 passes through the hot water pipe 37 of the second regenerator 30 and passes through the first inlet and outlet 300a and the second inlet and outlet 300c to be hot water outlet water. discharged to line 154 . In addition, in the process in which the hot water is discharged to the hot water outlet line 154 , it may exchange heat with the absorbent liquid sprayed from the second absorbent liquid injector 36 .

Conversely, in a state in which the hot water conversion valve 300 is on, that is, the first input/output part 300a is closed, and the third input/exit part 300b and the second entry/exit part 300c are open. In this state, the hot water flowing through the auxiliary regenerator-regenerator connection line 153 does not pass through the hot water pipe 37 of the second regenerator 30 through the bypass flow path 301, and the third input/output unit 300b and It may be discharged to the hot water outlet line 154 through the second inlet/outlet 300c. In addition, since the hot water does not pass through the hot water pipe 37 of the second regenerator 30 while the hot water is discharged to the hot water outlet line 154 , heat exchange in the hot water pipe 37 is not performed.

On the other hand, in the absorption refrigerator, the absorption liquid (C) includes the absorber 10, the first flow path 81 of the low-temperature heat exchanger 80, the third flow path 71 of the high-temperature heat exchanger 70, and the first regenerator ( 20), the fourth flow path 72 of the high-temperature heat exchanger 70, the second regenerator 30, and the second flow path 82 of the low-temperature heat exchanger 80 sequentially pass through the absorber 10 It may have a first cycle introduced into the In addition, in the absorption chiller, the auxiliary absorption liquid (D) is the auxiliary absorber 50 , the fifth passage 91 of the auxiliary heat exchanger 90 , the auxiliary regenerator 60 , and the sixth passage of the auxiliary heat exchanger 90 . After sequentially passing through 92 , it may have a second cycle introduced into the auxiliary absorber 50 .

Then, the refrigerant (A) evaporated in the evaporator (1) is mixed with the absorption liquid (C) in the absorber (10), and the first flow path (81) of the low-temperature heat exchanger (80) together with the absorption liquid (C), high-temperature heat exchange After sequentially passing through the third flow path 71 of the group 70, it can flow to the first regenerator 20, and a part of it can be separated from the absorption liquid C through heat exchange in the first regenerator 20. can The refrigerant (A) separated from the absorption liquid (C) in the first regenerator (20) flows to the condenser (40), is condensed, and then flows into the flash tank (200) to be described later.

Meanwhile, the remaining refrigerant not separated from the absorption liquid C in the first regenerator 20 may be evaporated in the second regenerator 30 to be separated from the absorption liquid C. In this case, the refrigerant (A) separated from the absorption liquid (C) in the second regenerator (30) is absorbed in the auxiliary absorption liquid (D) disposed in the auxiliary absorber (50) in the auxiliary absorption region, and is auxiliary together with the auxiliary absorption liquid (D). It may pass through the fifth flow path 91 of the heat exchanger 90 , and may be separated from the auxiliary absorption liquid D in the auxiliary regenerator 60 . On the other hand, the refrigerant (A) separated from the absorption liquid (C) in the auxiliary regenerator ( 60 ) may flow into the condenser ( 40 ) and be condensed and then introduced into the flash tank ( 200 ).

In the absorption chiller, the inside of the second shell 22 where the condenser 40 is located is high pressure (P1), the first shell 2 where the evaporator 1 is located is low pressure (P3), the second regenerator 30 and the auxiliary The inside of the third well 32 in which the absorber 50 is located may have an intermediate pressure P2 between the high pressure P1 and the low pressure P3 . That is, the pressure magnitude can be determined in the order of the internal pressure P1 of the second shell 22, the internal pressure P2 of the third shell 32, and the internal pressure P3 of the first shell 2, If this is summarized in a simple formula, it can be a relationship of P1>P2>P3.

The absorption chiller is installed in the refrigerant line 100 between the condenser 40 and the evaporator 10 to supply liquid refrigerant to the evaporator 10, and a flash tank 200 for supplying gaseous refrigerant to the auxiliary absorber 50. may include

The auxiliary regenerator-second regenerator connection line 153 may be defined as a first connection line, and the auxiliary absorber-auxiliary heat exchanger connection line 131 and the auxiliary heat exchanger-auxiliary regenerator connection line 132 are integrated into the second It can be defined as a connecting line.

In addition, the present invention may further include an absorbent liquid branch pipe (191). The absorption liquid branch pipe 191 supplies a portion of the absorption liquid discharged from the absorber 10 to the second regenerator 30 . If the temperature and concentration of the absorbent liquid flowing into the second regenerator 30 through the absorbent liquid branch pipe 191 is lowered, regeneration performance is improved and the efficiency of the entire system is improved.

For example, one end of the absorption liquid branch pipe 191 is connected to a pipe connecting the absorber 10 and the first regenerator 20 , and the other end of the absorption liquid branch pipe 191 is connected to the first regenerator 20 and the second regenerator 20 . It may be connected to a pipe connecting the regenerator 30 .

Specifically, one end of the absorption liquid branch pipe 191 is connected to the pipe 122 connecting the absorber 10 and the heat exchanger, and the other end of the absorption liquid branch pipe 191 is a pipe connecting the heat exchanger and the second regenerator 30 . (125) can be connected.

More specifically, one end of the absorption liquid branch pipe 191 is connected to the low-temperature heat exchanger-high-temperature heat exchanger connection line 122, and the other end of the absorption liquid branch pipe 191 is connected to the high-temperature heat exchanger-second regenerator connection line 125. can be connected to

The amount of the absorption liquid flowing into the absorption liquid branch pipe 191 can be adjusted by a difference in cross-sectional area between the low-temperature heat exchanger-high-temperature heat exchanger connection line 122 and the absorption liquid branch pipe 191 . The cross-sectional area ratio of the absorption liquid branch pipe 191 and the low-temperature heat exchanger-high-temperature heat exchanger connection line 122 is preferably 1:2-4.

In addition, the absorption liquid branch pipe 191 may further include an absorption liquid opening/closing valve 192 for opening and closing the absorption liquid branch pipe 191 . The absorption liquid opening/closing valve 192 may include an electromagnetic expansion valve. By adjusting the opening value of the absorption liquid opening/closing valve 192 , the amount of the absorption liquid flowing into the high-temperature heat exchanger-second regenerator connection line 125 can be adjusted.

The present invention may further include a flow rate sensor 409 for detecting the flow rate of the cold water line (5). The flow rate sensor 409 detects the flow rate in the cold water line 5 and provides it to a controller (not shown).

The freezing prevention pipe 401 supplies at least a portion of the refrigerant discharged from the regenerator to the evaporator 1 . The anti-freezing pipe 401 supplies the high-temperature refrigerant of the regenerator to the evaporator 1 to prevent the temperature of the evaporator 1 from being excessively lowered, thereby preventing freezing of the cold water line 5 .

The freezing prevention pipe 401 may supply a portion of the gas phase refrigerant of the regenerator to the evaporator 1 , and may supply a portion of the absorption liquid of the regenerator to the evaporator 1 . The refrigerant may include a gaseous refrigerant and an absorption liquid.

One end of the anti-freezing pipe 401 may be connected to the regenerator, and the other end of the anti-freezing pipe 401 may be connected to the evaporator 1 .

As another example, one end of the freezing prevention pipe 401 is connected to a pipe connecting the regenerator and the condenser 40, and the other end of the freezing prevention pipe 401 is connected to a pipe connecting the evaporator 1 and the condenser 40. can

Specifically, one end of the freezing prevention pipe 401 may be connected to a pipe connecting the regenerator and the condenser 40 , and the other end of the freezing prevention pipe 401 may be connected to the refrigerant injector 6 .

More specifically, one end of the freezing prevention pipe 401 may be connected to the first regenerator 20-high temperature heat exchanger connection line 124 connecting the first regenerator 20 and the second regenerator 30 .

As another example, although not shown in the drawings, one end of the anti-freezing pipe 401 may be connected to the first shell 2 and the other end of the anti-freezing pipe 401 may be connected to the third shell 32 .

The freeze opening/closing valve 402 is disposed on the freeze prevention pipe 401 to open and close the freeze prevention pipe 401 . The freeze on/off valve 402 is opened when the flow rate of the cold water detected by the flow rate sensor is less than a preset flow rate, and is closed when the flow rate of the cold water detected by the flow rate sensor is greater than or equal to the preset flow rate.

Specifically, when the controller determines that the flow rate of the cold water detected by the flow rate sensor is cut off, the freezing/closing valve 402 is closed. The controller may open the freeze on/off valve 402 after 30 minutes to 1 hour have elapsed.

In addition, when it is determined that the cold water is cut off, the controller may stop the absorption chiller and close the freezing on/off valve 402 .

Hereinafter, the operation of the two stages of the absorption chiller according to the embodiment of the present invention will be described.

First, in order to maximize the heat exchange efficiency of the cold water, the cooling operation in the full cooling load operation state will be described.

2 and 3 , first, the refrigerant of the evaporator 1 flows into the refrigerant injector 6 through the pump passage 8 by the refrigerant pump 9 and is sprayed from the refrigerant injector 6 . The injected refrigerant evaporates through heat exchange with the refrigerant of the cold water pipe 7 and changes to a gaseous refrigerant state.

The changed gaseous refrigerant is moved to the absorption region through the first eliminator 4 , and the moved gaseous refrigerant is absorbed by the absorbent liquid sprayed from the absorbent liquid injector 16 of the absorber 10 . The absorption liquid whose concentration is lowered by absorbing the gaseous refrigerant is introduced into the first flow path 81 of the low-temperature heat exchanger 80 through the absorber 10-low-temperature heat exchanger connection line 121 by the first pump 19, It can exchange heat with the absorbent liquid flowing in from the absorbent liquid receiver 33 . Thereafter, the diluted solution passes through the third flow path 71 of the high-temperature heat exchanger 70 and undergoes heat exchange with the absorbent liquid regenerated from the first regenerator 20, and then the absorbent liquid in the first regenerator 20 in a lowered state. It may be injected through the injector 26 . The injected dilute solution may be separated into a refrigerant and an absorption liquid previously absorbed while being sprayed on the hot water pipe 27 . This is defined as primary separation.

The primary separated gaseous refrigerant may be condensed by the cooling water pipe 47 disposed in the condenser 40 . In addition, the condensed refrigerant may be introduced into the flash tank 200 through the flash tank inlet line 102 , and may be separated from the flash tank 200 into a liquid refrigerant and a gaseous refrigerant. This is because most of the condensed refrigerant is in the form of a liquid refrigerant, but some gaseous refrigerants may exist depending on the condensation rate.

The separated liquid refrigerant flows into the evaporator 1 through the tank outlet line 104, and the separated gaseous refrigerant flows into the auxiliary absorption area through the first refrigerant outlet pipe 230 and the gaseous refrigerant inlet 58. can

On the other hand, the absorbent liquid first separated from the first regenerator 20 is transferred by the second pump 29 to the first regenerator 20-high-temperature heat exchanger connection line 124 and the fourth flow path of the high-temperature heat exchanger 70 ( 72) and the high-temperature heat exchanger-second regenerator 30 through the connection line 125 to move to the second absorbent liquid injector 36 of the second regenerator 30 to be sprayed.

In this case, hot water flows through the auxiliary regenerator-second regenerator 30 connection line 153 , the hot water pipe 37 of the second regenerator 30 , and the hot water outlet line 154 . This is because the flow conversion valve 300 is in an on state, that is, the first input/output part 300a and the second input/exit part 300c are open, and the third input/output part 300b is closed. This is because, as it passes through the part 300a and the second entry/exit part 300c, it does not flow to the bypass flow path 301, but flows toward the hot water pipe 37.

The firstly separated absorbent liquid sprayed through the second absorbent liquid injector 36 may be secondarily separated into a gaseous refrigerant and an absorbent liquid while passing through heat exchange with the hot water pipe 37 . The secondly separated absorption liquid is accommodated in the absorption liquid receiver 33, and the second regenerator 30-low temperature heat exchanger connection line 126, the low temperature heat exchanger 80 and the low temperature heat exchanger-absorber 10 connection line 127 ) through the absorbent liquid injector 16 and may be sprayed into the absorber 10 .

That is, in the absorption refrigerator, the absorption liquid flows from the absorber 10 to the first flow path 81 of the low-temperature heat exchanger 80, the third flow path 71 of the high-temperature heat exchanger 70, the first regenerator 20, and the high-temperature coupling exchanger. After sequentially passing through the fourth flow path 72 of 80, the second regenerator 30, and the second flow path 82 of the low-temperature heat exchanger 82, the first cycle reintroduced into the absorber 10 is performed. can have

On the other hand, the auxiliary absorbent liquid flowing into the auxiliary absorbers 10 and 50 is transferred by the fourth pump 59 to the auxiliary regenerator-auxiliary heat exchanger connection line 133 and the fifth flow path 91 of the auxiliary heat exchanger 90 . And it may flow to the auxiliary absorption liquid injector 66 through the auxiliary heat exchanger-auxiliary regenerator connection line 132 , and may be injected into the auxiliary regenerator 60 through the auxiliary absorption liquid injector 66 .

The auxiliary absorption liquid injected into the auxiliary regenerator 60 may be first separated by heat exchange with the hot water flowing in the hot water pipe 67 of the auxiliary regenerator 60 . In this case, the auxiliary absorption liquid may be separated into a primary separated auxiliary absorption liquid and a gaseous refrigerant, and the separated gaseous refrigerant may be condensed by the condenser 40 .

In addition, the primary separated auxiliary absorption liquid is the auxiliary regenerator-auxiliary heat exchanger connection line 133, the sixth flow path 92 of the auxiliary heat exchanger 90, and the auxiliary heat exchanger-auxiliary absorber 10 connection line 134. It may move to the auxiliary absorbent liquid injector 56 through the auxiliary absorber 10 and may be sprayed into the auxiliary absorber 10 and 50 . The primary separated auxiliary absorption liquid injected from the auxiliary absorption liquid injector 56 is separated from the gaseous refrigerant generated in the second regenerator 30 by heat exchange between the hot water in the hot water pipe 37 and the firstly separated absorption liquid and secondary separation. , it is possible to absorb the gaseous refrigerant flowing from the flash tank 200 through the gaseous refrigerant inlet 58 .

That is, in the absorption chiller, the auxiliary absorption liquid (D) is the auxiliary absorber (10) (50), the fifth flow path (91) of the auxiliary heat exchanger (90), the auxiliary regenerator (60), and the auxiliary heat exchanger (90). After sequentially passing through the sixth flow path 92 , the second cycle may be introduced into the auxiliary absorbers 10 and 50 .

Both the first cycle and the second cycle may operate in the cooling operation state in the full cooling load operation state of the absorption chiller. That is, by using both the absorbent liquid (C) and the auxiliary absorbent liquid (D), the absorption efficiency of the absorbent liquid (C) is increased, and ultimately, the heat exchange efficiency of cold water is increased to enable rapid freezing.

Second, the cooling operation in the partial cooling load operation state to lower the heat exchange efficiency of the cold water and reduce power consumption will be described. In the following, compared with the operation in the full cooling load operation state, only the parts that are different will be described, and the operation in the fully cooling load operation state is used for the other parts.

4 and 5 , the second cycle of the absorption chiller does not operate in the partial cooling load operation state. That is, the configuration of the auxiliary absorbers 10 and 50, the auxiliary heat exchanger 90, and the auxiliary regenerator 60 is stopped.

In detail, as the operation of the fourth pump 59 is stopped, the flow of the auxiliary absorption liquid circulating from the auxiliary absorbers 10 and 50 to the auxiliary heat exchanger 90 and the auxiliary regenerator 60 is stopped and not operated.

In addition, in the first cycle, the following configuration may be different from that of the first cycle in the fully cooling load operation state.

The absorbent liquid primarily separated from the first regenerator 20 is transferred by the second pump 29 to the first regenerator 20-high temperature heat exchanger connection line 124 and the fourth flow path 72 of the high temperature heat exchanger 70 . and the high-temperature coupling exchanger-second regenerator 30 may be moved to the second absorbent liquid injector 36 of the second regenerator 30 through the connection line 125 , and may be sprayed onto the second regenerator 30 .

In this case, the flow conversion valve 300 operates in an on state, so that the hot water flowing along the auxiliary regenerator-second regenerator 30 connection line 153 passes through the bypass flow path 301 to the third input/output. It flows into the part 300b and is discharged to the hot water outlet line 154 through the second input/output part 300c. That is, the hot water may be directly discharged through the hot water outlet line 154 without passing through the hot water pipe 37 of the second regenerator 30 .

In addition, through this, the absorbent liquid primarily regenerated from the first regenerator is not regenerated secondarily in the second regenerator 30 , but directly flows into the absorber 10 through the absorbent liquid receiver 33 of the second regenerator 30 . have. That is, in the first cycle, only the first regeneration of the absorbent liquid (C) is performed. This is because the partial cooling load operation aims to reduce power consumption rather than cooling efficiency.

In the case of partial cooling load operation, as the hot water does not pass through the hot water pipe 37 of the second regenerator 30, the following effects are obtained.

In the case of the conventional full cooling load operation, since the second cycle operates, the auxiliary absorption liquid (D) absorbs some refrigerant in the auxiliary absorbers (10, 50), and the auxiliary absorption liquid (D) absorbing the refrigerant is auxiliary Since it flows into the auxiliary regenerator 60 through the fifth flow path 91 of the heat exchanger 90 and the absorbed refrigerant can be condensed, the refrigerant can circulate normally along the cooling cycle.

However, in the case of the partial cooling load operation, the second cycle is not performed because the fourth pump 59 is not operated. That is, the auxiliary absorption liquid D of the auxiliary absorbers 10 and 50 does not flow to the auxiliary regenerator 60 . In this case, when the hot water passes through the hot water pipe 37 of the second regenerator 30 , the firstly regenerated absorbent liquid flowing in through the second regenerator 30 is regenerated through the second regenerator 30 . do. In the process in which the first regenerated absorbent liquid is secondarily regenerated, the refrigerant is separated, and the separated refrigerant is absorbed in the auxiliary absorbent liquid (D) of the auxiliary absorbers (10) and (50).

However, since the fourth pump 59 is off, the auxiliary absorption liquid D does not circulate, and accordingly, the refrigerant absorbed in the auxiliary absorption liquid D is not circulated and the auxiliary absorbers 10 and 50 are not circulated. ), and there is a problem that the refrigerant required for the entire cycle is insufficient.

6 is a view showing the configuration of an absorption refrigerator according to another embodiment of the present invention.

Referring to FIG. 6 , in the absorption chiller according to another embodiment of the present invention, as compared with the embodiment of FIG. 1 , one regenerator is added, and there is a difference in the arrangement of the heat exchanger and the arrangement of the absorption liquid branch pipe.

The absorption chiller of another embodiment includes an evaporator, an absorber 10, a regenerator, and a condenser, and the regenerator includes a first regenerator 20a, a second regenerator 30a, and a third regenerator 30b, and a first heat exchange It may include a group 70a and a second heat exchanger 80a. The refrigerant forms a first cycle that circulates through the absorber 10, the first regenerator 20a, the second regenerator 30a and the third regenerator 30b. In FIG. 6, only the circulation of the absorbent liquid is schematically illustrated.

The regenerator includes a first regenerator 20a in which the absorbent liquid discharged to the absorber 10 is regenerated, a second regenerator 30a in which the absorbent liquid regenerated in the first regenerator 20a is regenerated, and a second regenerator 30a. and a third regenerator 30b for regenerating the regenerated absorbent liquid.

The first regenerator 20a may regenerate the absorbent liquid at a higher temperature than the second regenerator 30a, and the second regenerator 30a may regenerate the absorbent liquid at a higher temperature than the third regenerator 30b.

The first heat exchanger 70a exchanges heat with the absorbent liquid discharged from the absorber 10 and the absorbent liquid regenerated by the second regenerator 30a. The second heat exchanger 80a exchanges heat between the absorbent liquid discharged from the first heat exchanger 70a and the absorbent liquid regenerated by the first regenerator 20a.

The absorber 10 and the first heat exchanger 70a are connected by a first pipe 501 , and the first heat exchanger 70a and the second heat exchanger 80a are connected by a second pipe 502 , and , the second heat exchanger 80a and the first regenerator 20a are connected by a third pipe 503 , and the absorbent liquid discharged from the first regenerator 20a is connected to the second heat exchanger by a fourth pipe 504 . 80a, the second heat exchanger 80a and the second regenerator 30a are connected by a fifth pipe 505, and the second regenerator 30a and the first heat exchanger 70a are connected to the sixth connected by a pipe 506 , the first heat exchanger 70a and the third regenerator 30b are connected by a seventh pipe 507 , and the third heat exchanger and the absorber 10 are connected through an eighth pipe 508 . connected by

The first absorbent liquid branch pipe 191a supplies a portion of the absorbent liquid discharged from the absorber 10 to the third regenerator 30b. For example, one end of the first absorption liquid branch pipe 191a is connected to the first pipe 501 connecting the absorber 10 and the first heat exchanger 70a, and the other end of the first absorbent liquid branch pipe 191a is connected. may be connected to a seventh pipe 507 connecting the first heat exchanger 70a and the third regenerator 30b.

The second absorbent liquid branch pipe 191b supplies a portion of the absorbent liquid discharged from the absorber 10 to the second regenerator 30a. For example, one end of the second absorption liquid branch pipe 191b is connected to the second pipe 502 connecting the first heat exchanger 70a and the second heat exchanger 80a, and the second absorption liquid branch pipe 191b ) may be connected to a fifth pipe 505 connecting the second heat exchanger 80a and the second regenerator 30a.

The amount of the absorbent liquid flowing into the first absorbent liquid branch pipe 191a may be adjusted by a difference in cross-sectional area between the first pipe 501 and the first absorbent liquid branch pipe 191a. The cross-sectional area ratio of the first absorption liquid branch pipe 191a and the first pipe 501 is preferably 1:2-4.

The amount of the absorbent liquid flowing into the second absorption liquid branch pipe 191b may be adjusted by a difference in cross-sectional area between the second pipe 501 and the second absorbent liquid branch pipe 191b. The cross-sectional area ratio of the second absorption liquid branch pipe 191b and the second pipe 502 is preferably 1:2-4.

In addition, the first absorption liquid branch pipe 191a may further include a first absorption liquid opening/closing valve 192a for opening and closing the absorption liquid branch pipe. The first absorption liquid opening/closing valve 192a may include an electromagnetic expansion valve. By adjusting the opening value of the first absorption liquid opening/closing valve 192a, the amount of absorption liquid flowing into the third regenerator 30b may be adjusted.

In addition, the second absorption liquid branch pipe 191b may further include a second absorption liquid opening/closing valve 192b for opening and closing the absorption liquid branch pipe. The second absorption liquid opening/closing valve 192b may include an electromagnetic expansion valve. By adjusting the value of the opening of the second absorption liquid opening/closing valve 192b, the amount of the absorption liquid flowing into the second regenerator 30a can be adjusted.

In addition, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the claims In addition, various modifications are possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

Claims (15)

an evaporator for evaporating the refrigerant;
an absorber for absorbing the refrigerant evaporated in the evaporator into the absorption liquid;
a regenerator for regenerating the absorbent liquid that has absorbed the refrigerant in the absorber; and
and a condenser for condensing the refrigerant separated from the absorption liquid in the regenerator,
The regenerator includes a first regenerator for regenerating the absorbent liquid discharged to the absorber, and a second regenerator for regenerating the absorbent liquid regenerated in the first regenerator;
The absorption refrigerator further comprising an absorption liquid branch pipe for supplying a portion of the absorption liquid discharged from the absorber to the ash regenerator. According to claim 1,
The first regenerator regenerates the absorption liquid at a higher temperature than the second regenerator. According to claim 1,
The absorption refrigerator further comprising an absorption liquid opening/closing valve for opening and closing the absorption liquid branch pipe. According to claim 1,
One end of the absorbent liquid branch pipe is connected to a pipe connecting the absorber and the first regenerator,
The other end of the absorption liquid branch pipe is connected to a pipe connecting the first regenerator and the second regenerator. According to claim 1,
and a heat exchanger for exchanging heat between the absorbent liquid discharged from the absorber and the absorbent liquid regenerated by the first regenerator. 6. The method of claim 5,
One end of the absorption liquid branch pipe is connected to a pipe connecting the absorber and the heat exchanger,
The other end of the absorption liquid branch pipe is connected to a pipe connecting the heat exchanger and the second regenerator. According to claim 1,
a cold water line for supplying cold water to the evaporator; and
a freeze prevention pipe for supplying at least a portion of the refrigerant discharged from the regenerator to the evaporator; and
Absorption refrigerator further comprising a freeze on/off valve for opening and closing the freeze prevention pipe. 8. The method of claim 7,
One end of the freezing equipment pipe is connected to a pipe connecting the regenerator and the condenser,
The other end of the antifreeze pipe is an absorption refrigerator that is connected to a pipe connecting the evaporator and the condenser. an evaporator for evaporating the refrigerant;
an absorber for absorbing the refrigerant evaporated in the evaporator into the absorption liquid;
a regenerator for regenerating the absorbent liquid that has absorbed the refrigerant in the absorber; and
and a condenser for condensing the refrigerant separated from the absorption liquid in the regenerator,
the regenerator,
a first regenerator for regenerating the absorbent liquid discharged into the absorber, a second regenerator for regenerating the absorbent liquid regenerated in the first regenerator, and a third regenerator for regenerating the absorbent liquid regenerated from the second regenerator. do,
a first absorbent liquid branch pipe for supplying a portion of the absorbent liquid discharged from the absorber to the third regenerator; and
The absorption refrigerator further comprising a second absorption liquid branch pipe for supplying a portion of the absorption liquid discharged from the absorber to the second regenerator. 10. The method of claim 9,
The first regenerator regenerates the absorbent liquid at a higher temperature than the second regenerator,
The second regenerator regenerates the absorption liquid at a higher temperature than the third regenerator. 10. The method of claim 9,
a first absorption liquid opening/closing valve for opening and closing the first absorption liquid branch pipe; and
The absorption refrigerator further comprising a second absorption liquid opening/closing valve for opening and closing the second absorption liquid branch pipe. 10. The method of claim 9,
a first heat exchanger for exchanging heat between the absorbent liquid discharged from the absorber and the absorbent liquid regenerated by the second regenerator; and
and a second heat exchanger exchanging heat between the absorbent liquid discharged from the first heat exchanger and the absorbent liquid regenerated by the first regenerator. 13. The method of claim 12,
One end of the first absorption liquid branch pipe is connected to a pipe connecting the absorber and the first heat exchanger,
The other end of the first absorption liquid branch pipe is connected to a pipe connecting the first heat exchanger and the third regenerator. 13. The method of claim 12,
One end of the second absorption liquid branch pipe is connected to a pipe connecting the first heat exchanger and the second heat exchanger,
The other end of the second absorption liquid branch pipe is connected to a pipe connecting the second heat exchanger and the second regenerator. 10. The method of claim 9,
and the refrigerant forms a first cycle in which the refrigerant circulates through the absorber, the first regenerator, the second regenerator and the third regenerator.

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