JP3443786B2 - Absorption refrigerator - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an absorption refrigerator,
Particularly, it relates to an absorption refrigerator using a bellows fin on the heat transfer surface of a high temperature regenerator.

[0002]

2. Description of the Related Art A corrugated bellows fin formed by continuously bending a thin plate in a high temperature regenerator of an absorption refrigerator, and a seal plate for sealing a chamber formed by the peaks and valleys of the bellows fin at an end surface. What is constituted by
-256536.

The high temperature regenerator disclosed in the above publication has a structure as shown in FIGS. 5 is a vertical sectional view thereof, and FIG. 6 is a horizontal sectional view taken along the line AA.

The high temperature regenerator shown in the figure is formed by continuously bending a thin plate having good thermal conductivity and is arranged with its surfaces parallel to the vertical direction. One side is a flow path for combustion gas and the other side is A bellows fin 21 which is a corrugated heat transfer surface having a dilute solution flow path, and a lower end seal plate which seals the lower end surface to secure a chamber formed by the peaks and valleys of the bellows fin 21; An upper end seal plate for sealing the upper end of the bellows fin 21 on the combustion gas flow path side;
Of the fuel combustion burner 1 connected to the lower part of the combustion gas flow path side, and the dilute solution flowing from the bellows fin 21 absorber through the solution heat exchanger in the vertical direction of the upper end seal plate. A dilute solution inlet 3 that is provided in the upper part and guides the dilute solution to the surface of the bellows fin 21 on the dilute solution flow path side, an outer shell 7 for forming a solution-side heat exchange chamber by the bellows fin 21, and a lower part of the outer shell 7. The concentrated solution outlet 4 formed on the outer shell 7 is discharged to the concentrated solution after the diluted solution is heat-exchanged with the combustion gas to generate a refrigerant vapor and then becomes a concentrated solution. The demister 6 for separating the solution entrained in the air, the exhaust pipe 8 for connecting the upper part of the bellows fin 21 on the combustion gas flow path side and discharging the combustion gas as exhaust gas, and the bellows fin 21. Flow path through which combustion gas passes And side plates that form the diluted solution inlet 3
The dipping solution 9 provided so that the dilute solution flowing in from the above forms a thin liquid film on the side wall of the dilute solution flow path of the bellows fin 21.
It is configured to include and.

The high temperature regenerator thus constructed also functions as a separator. The dilute solution that has flowed in from the dilute solution inlet 3 is dropped onto the wall surface of the bellows fin 21 by the dispersion drip unit 9 to form a thin liquid film, and the bellows fin 21 is used as a heat transfer surface to exchange heat with the combustion gas to form a refrigerant vapor. It is generated and is concentrated into a concentrated solution. This concentrated solution is discharged from a concentrated solution outlet 4 provided below the high temperature regenerator. The generated refrigerant vapor is separated from the solution by the demister 6 and discharged from the refrigerant vapor outlet 5.

[0006]

However, in such a high temperature regenerator, the bellows fin 2 which is a heat transfer surface is used.
In order to form a liquid film uniformly on the entire surface of No. 1, its wettability is required to be good. That is, the wettability of the surface of the bellows fins 21 is a major factor in heat exchange performance, and surface processing and surface treatment are required to improve the wettability of the heat transfer surface, which makes it difficult to reduce the cost. .

The present invention has been made to solve the above problems, and an object thereof is to improve the heat exchange efficiency of a high temperature regenerator and to reduce the cost.

[0008]

In order to achieve the above object, the present invention provides a high temperature regenerator, a separator, a condenser, an evaporator,
In an absorption refrigerator in which a refrigeration cycle is formed by connecting a pipe to an absorber, the high temperature regenerator is a corrugated bellows fin processed by continuous bending of a thin plate as a heat transfer surface,
A heat exchanger including a seal plate that seals a chamber formed by a peak portion and a valley portion of the bellows fin with an end surface, and one side of the bellows fin serves as a flow path of a heating medium, A partition plate is disposed on the other side of the bellows fin so as to face the surface of the other side, and a partition for storing a dilute solution is formed using the partition plate and the other side surface of the bellows fin as a wall surface.
The solution heated by the heating medium via the bellows fins is allowed to flow out of the compartment over the upper end of the partition plate.

A combustion chamber is arranged below the bellows fins,
While using combustion gas as a heating medium, a liquid jacket is formed around the combustion chamber to provide an inlet for the dilute solution in the liquid jacket, and a compartment for storing the dilute solution and an inlet for the dilute solution are provided as a liquid jacket. You may make it communicate via.

According to the above construction, the dilute solution supplied to the high temperature regenerator exchanges heat with the combustion gas while being stored in the compartment having the bellows fin, which is the heat transfer surface, as one wall surface.
The entire bellows fin participates in heat exchange as a heat transfer surface. Therefore, the surface treatment and surface treatment for improving the wettability for uniformly forming the liquid film on the bellows fin are unnecessary, and the manufacturing cost is reduced without impairing the heat exchange performance. Further, if a liquid jacket is formed around the combustion chamber and the dilute solution is supplied to the compartment through this liquid jacket, heat is not released from the combustion chamber to the outside, and the heat is effectively recovered and heat exchanged. Performance can be improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An absorption refrigerator according to a first embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 4. As shown in FIG. 4, the absorption refrigerator according to the present embodiment uses a solution using, for example, lithium bromide as an absorbing liquid and water as a refrigerant. A solution that has sufficiently absorbed the refrigerant becomes a dilute solution. The absorption chiller of the present embodiment includes a high temperature regenerator 10 that heats this dilute solution with a heating source to generate a refrigerant vapor to make a concentrated solution, and the refrigerant vapor generated in this regenerator is liquefied into a refrigerant liquid. Condenser 26, an evaporator 34 for spraying the refrigerant liquid from the condenser to the evaporation coil 32 and evaporating it to obtain cold water by utilizing heat of vaporization at that time, and the high temperature regenerator 1
An absorber 44, which absorbs the refrigerant vapor vaporized in the evaporator 34 by spraying the concentrated solution which exchanges heat from 0 to the separator 16 and the high temperature solution heat exchanger 36, and the absorber 44.
The solution circulating pump 54 that sends the diluted solution that has absorbed the refrigerant to the high temperature regenerator 10 via the low temperature solution heat exchanger 42 and the high temperature solution heat exchanger 36. The present embodiment is an absorption refrigerator having such a configuration, and particularly relates to a high temperature regenerator thereof. Note that, in FIG. 4, the high temperature regenerator 10 and the separator 16 are separate bodies, but in the present embodiment, they are integrally formed as in the case of the prior art. The details will be described below.

FIG. 1 is a vertical cross-sectional view showing a schematic structure of a high temperature regenerator in which bellows fins are vertically arranged.
[Fig. 2] is a transverse sectional view taken along the line AA of Fig. 1. 1 and 2
The high temperature regenerator shown in FIG. 6 differs from the high temperature regenerator shown in FIGS. 5 and 6 in that the partition plate between the bellows fin 21 and the outer case 7 has a height reaching from the vicinity of the lower end seal plate to the upper end of the bellows fin 21. 70 is arranged, the partition plate 70 and the bellows fin 21
A partition 71 for storing the dilute solution is formed between them, a dilute solution inlet 3 for introducing the dilute solution into the partition 71 is connected to the lower part of the partition plate 70, and the dilute solution is provided above the upper end seal plate. The inlet is not provided, and the heated dilute solution flows over the upper end of the partition plate 70 and flows into the space 72 between the partition plate 70 and the outer case 7. The partition plate 70 is arranged in contact with the crests of the bellows fins 21 so as to separate a plurality of channels formed by the peaks and valleys of the bellows fins 21, but the dilute solution inlet 3 has the bellows fins 21. It is formed so as to be commonly connected to a plurality of flow paths formed by the peaks and valleys. Other configurations are shown in FIG.
Since it is the same as that shown in FIG. 6, description thereof will be omitted. The demister 6 is arranged above the space 72.

The dilute solution is introduced into the compartment 71 through the dilute solution inlet 3 at the lower portion and stored therein. In the state where the diluted solution is stored in the compartment 71 and the diluted solution is continuously introduced into the compartment 71 from the lower diluted solution inlet 3, the bellows fin 2
Heat exchange is performed between the combustion gas and the dilute solution with 1 as the heat transfer surface. In heat exchange, the entire bellows fin 21 below the liquid surface at that time is effectively used as a heat transfer surface. As a result, the surface treatment and surface processing of the bellows fin 21 required for ensuring the wettability of the heat transfer surface are not required, and the manufacturing process is simplified and the manufacturing cost is reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. The high temperature regenerator of the embodiment shown in FIG.
The difference from the high temperature regenerator of the embodiment is that the lower end seal plate seals the lower end of the bellows fin 21 on the side that is the bottom of the compartment 71, and the lower end of the bellows fin 21 that is the flow path of the combustion gas. Is open, combustion burner 1
The combustion chamber 73 is disposed below the bellows fin 21, and the liquid jacket 74 is formed around the combustion chamber 73.
The liquid jacket 74 and the bottom of the compartment 71 are communicated with each other, and the dilute solution inlet 3 is connected to the liquid jacket 74. With this configuration, the heat released from the combustion chamber to the surroundings is recovered in the dilute solution in the liquid jacket, and the heat exchange performance is improved.

Further, in the example shown in FIG. 2, the partition plate 70
May be disposed in contact with the peaks of the bellows fins 21 and away from the peaks of the bellows fins 21 so that the plurality of channels formed by the peaks and valleys of the bellows fins 21 are not separated.

In each of the above embodiments, the high temperature regenerator has a structure including the function of a separator, but the separator may be separated and formed as a separate body.

[0017]

As described above, according to the absorption refrigerator of the present invention, the working process of the high temperature regenerator can be simplified, and the working cost can be reduced without impairing the heat exchange performance.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a schematic configuration of a high temperature regenerator of a first embodiment of an absorption refrigerator according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a vertical cross-sectional view showing a schematic configuration of a high temperature regenerator of a second embodiment of an absorption refrigerator according to the present invention.

FIG. 4 is a system configuration diagram showing an overall configuration of an absorption refrigerator according to an embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view showing a conventional example of a high temperature regenerator.

6 is a transverse cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

1 Burner 3 Dilute Solution Inlet 4 Concentrated Solution Outlet 5 Refrigerant Vapor Outlet 6 Demister 7 Outer Body 8 Exhaust Stack 9 Dispersion Dropper 10 High Temperature Regenerator 21 Bellows Fin 26 Condenser 32 Absorber 34 Evaporator 36 High Temperature Solution Heat Exchanger 42 Low Temperature Solution heat exchanger 54 Solution circulation pump 70 Partition plate 71 Partition for storing dilute solution 72 Space between outer shell and partition plate 73 Combustion chamber 74 Liquid jacket

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F25B 33/00

Claims (2)

(57) [Claims] 1. A high temperature regenerator, a separator, a condenser, an evaporator,
In an absorption refrigerator in which a refrigeration cycle is formed by connecting a pipe to an absorber, the high temperature regenerator is a corrugated bellows fin processed by continuous bending of a thin plate as a heat transfer surface,
A heat exchanger including a seal plate that seals a chamber formed by a peak portion and a valley portion of the bellows fin with an end surface, and one side of the bellows fin serves as a flow path of a heating medium, A partition plate is disposed on the other side of the bellows fin so as to face the surface of the other side, and a partition for storing a dilute solution is formed using the partition plate and the other side surface of the bellows fin as a wall surface.
The absorption chiller characterized in that the solution heated by the heating medium via the bellows fins flows out from the compartment over the upper end of the partition plate. 2. The absorption refrigerator according to claim 1, wherein a combustion chamber is arranged below the bellows fins, the combustion gas is used as a heating medium, and a liquid jacket is formed around the combustion chamber. An absorption refrigerator, wherein a jacket is provided with an inlet for a dilute solution, and a compartment for storing the dilute solution is communicated with an inlet for the dilute solution through a liquid jacket.