JPS6023264B2 - Air-cooled absorption refrigerator that removes absorbed heat using absorption liquid as a heat medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air-cooled absorption refrigerator that removes absorbed heat using an absorption liquid as a heat medium.

In conventional absorption refrigerators, the highly concentrated absorption liquid flowing down the outer surface of the absorber tube group decreases in concentration as it absorbs the soot vapor evaporated in the evaporator, generating absorption heat. .

Therefore, the absorption liquid is cooled by flowing cooling water from a cooling tower or the like into the tubes of the absorber tube group while replenishing the insufficient amount due to evaporation from the outside. However, such conventional methods are not suitable for areas where cooling water is difficult to obtain, such as where water resources are scarce or the water quality is dirty.

This invention does not rely on such conventional water cooling method,
An absorption liquid air-cooling section is installed in the absorption liquid circulation system from the absorber to the upper absorption liquid dispersion device, and a regenerator is installed in the pipe line that diverts a part of the absorption liquid circulation amount. The heated and concentrated absorption liquid is returned to the absorption liquid circulation system, and the cold soot that has been evaporated and separated in the regenerator is cooled and condensed through the cold soot condensation air cooling section. By returning the cooling liquid to the cooling liquid circulation system leading to the equipment, the condenser that uses cooling water can be omitted, and the absorption liquid itself can be used as a heat medium instead of cooling water to radiate absorbed heat to the atmosphere, making it easier to cool the absorption liquid. In addition, the concentration of the absorption liquid in the absorber can be maintained at a predetermined value.

The present invention will be explained below with reference to embodiments shown in the drawings.

The drawing shows a structural system diagram of the present invention, in which a refrigerating liquid such as water accumulated in a saucer 2 provided over almost the entire length of the body in a closed container 1 made of a hollow body is provided in a conduit 4. The refrigeration pump 3 passes through the pipe 4 to the spraying device 16, where it is sprayed onto the outer surface of the tubes of the evaporator 6 located above the receiver tray 2, and flows into the pipe from the pipe 5 to be distributed. Conduit 1
7 shows the refrigeration effect in which the cold water flowing out is cooled by the heat of vaporization of the cold soot.

This cold water is used for cooling, freezing, and other purposes. That is, the refrigerant liquid itself evaporates at an evaporation temperature corresponding to the pressure within the evaporator. In order to provide a mechanism for performing such an evaporation action, the evaporator 6 is placed in a closed container 1 that is maintained at a high degree of vacuum. At the bottom of the density container 1, there is provided a reservoir 7 for an absorbing liquid such as an aqueous lithium bromide solution, and the absorbing liquid is discharged into a pipe 18. The absorption liquid passes through the air cooling section 9, passes through the pipe line 19, and is disposed in the space above the tray-shaped absorber 11, which has a large number of through holes formed in multiple stages at a required interval above the reservoir 7. It is made to be distributed widely.

Therefore, the cold soot vapor from the evaporator 6 described above can be absorbed. In the present invention, first, the circulation amount of the absorption liquid is increased. While the absorber 11 is absorbing the soot vapor, it is not cooled with cooling water, but its own temperature rises due to the absorbed heat. This is to keep the increase to a minimum. The absorption liquid is cooled by atmospheric air using a cooler such as the absorption liquid air cooling section 9, and then transferred to the spraying device 1.
Bring back the river. On the other hand, a part of the absorption liquid in the absorption liquid reservoir 7 flows into the separation skin pipe line from the pipe line 18 by the absorption liquid pump 8, and the flow rate is adjusted by the flow rate adjustment device 12 having a control valve, and the heat exchanger 13 is controlled. The absorption liquid is then supplied to the regenerator 14, where the absorption liquid is heated and boiled using the heat source 21 or a heat medium from the outside. In the conventional method, the generated cold soot vapor is cooled and liquefied in a condenser using cooling water, but in the present invention, the refrigerant vapor is passed through a pipe 22 and cooled and liquefied in an air-cooled condenser, that is, a cold soot condensing air cooling section 15. and pipe 2
3 to the saucer 2 below the evaporator 6, etc., to the soot liquid circulation system as appropriate. The absorption liquid itself increases in concentration in the regenerator 14, passes through the pipe line 24, passes through the heat exchanger 13, and then returns to the regenerator 1.
Heat is applied to the absorption liquid sent to the absorption liquid circulation system 4, and the absorption liquid is returned to the absorption liquid circulation system as appropriate, such as in the space above the reservoir 7, to maintain the concentration of the absorption liquid circulation system.

As mentioned above, since there is no need to cool the absorption liquid in the absorber 11, it is only necessary to expect good gas-liquid contact between the absorption liquid and the refrigerant vapor in the absorber 11. Although a filling shelf is shown as an example, the absorber may be filled with a plastic filling for gas-liquid contact formed in a honeycomb shape with a circular cross section, a square cross section, or any other arbitrary shape.

As is clear from the description of the above embodiments, according to the configuration of the present invention, the flow rate of the absorption liquid in the absorber is increased, the rise in absorption heat generated when refrigerant vapor is absorbed is suppressed as much as possible, and the temperature rise is The absorbed liquid is cooled by radiating heat to the atmosphere in the absorption liquid air-cooling section installed in the absorption liquid circulation system, and then returned to the spraying equipment.Therefore, there is no need to use cooling water at all as in the conventional method, so cooling is possible. Ideal for use in areas where water is difficult to obtain. In addition, since a part of the circulating amount of absorption liquid is concentrated in the regenerator and returned to the absorption liquid circulation system, the concentration of absorption liquid in the absorber can be maintained at a predetermined value, which eliminates the risk of reducing the absorption capacity. Nor. Furthermore, the refrigerant that is heated by the heat medium and evaporated and separated in the regenerator is cooled and liquefied by radiating heat to the atmosphere in the refrigerant condensing air cooling section, and is returned to the soot liquid circulation system from the evaporator to the dispersion equipment above it. Therefore, unlike the cooling method using cooling water in the secondary condenser, no cooling water is required.

[Brief explanation of the drawing]

The drawing is a structural system diagram showing one embodiment of the present invention. 1...Airtight container, 2...Saucer, 3...
... Refrigerated pump, 4, 5, 17, 18, 19, 20, 2
2, 23, 24... Pipeline, 6... Evaporator, 7... Reservoir, 8... Absorbent pump,
9... Absorption liquid air cooling section, 10, 16... Spraying device, 11... Absorber, 12... Flow rate adjustment device, 1
3... Heat exchanger, 14... Regenerator, 15...
... Cold soot condensation air cooling section, 21 ... Heat source.

Claims (1)

[Scope of Claims] 1. Absorption liquid air cooling for increasing the amount of absorption liquid flowing through the absorber and cooling the absorption liquid whose temperature has risen due to absorption heat generated during absorption of refrigerant vapor from the evaporator by radiating heat to the atmosphere. An air-cooled absorption refrigerator that removes absorbed heat using an absorption liquid as a heat medium, characterized in that a part is provided in an absorption liquid circulation system from an absorber to a dispersion device. 2. The absorption liquid according to claim 1 is filled with a filler configured to increase the gas-liquid contact area so as to efficiently absorb the refrigerant vapor generated from the evaporator. Air-cooled absorption refrigerator that removes absorbed heat as a medium. 3. The absorption liquid air-cooling section is arranged in a group of tubes having fins on the outer surface, and the absorption liquid is flowed inside the tubes and air is passed outside the tubes to cool the absorption liquid and lower the temperature.
An air-cooled absorption refrigerator that removes absorbed heat using the absorption liquid described in item 1 or 2 as a heat medium. 4 Increase the amount of absorption liquid flowing through the absorber, and distribute the absorption liquid air-cooling section from the absorber to cool the absorption liquid, whose temperature has risen due to absorption heat generated when absorbing refrigerant vapor from the evaporator, by releasing heat to the atmosphere. A branch pipe is installed in the absorption liquid circulation system leading to the device, and a branch pipe is provided to divert a part of the circulation amount of the absorption liquid to the circulation system. An air-cooled absorption refrigerator that removes absorption heat using the absorption liquid as a heat medium, characterized in that the absorption liquid concentrated in the regenerator is returned to the absorption liquid circulation system. 5. A patent claim in which the refrigerant heated by the heating medium and evaporated and separated in the regenerator is returned to the refrigerant liquid circulation system from the evaporator to the dispersion device through a refrigerant condensing air cooling section for radiating heat to the atmosphere and cooling and liquefying the refrigerant. An air-cooled absorption refrigerator that removes absorbed heat using the absorption liquid according to item 4 as a heat medium.