JPH08200883A - Absorptive freezer - Google Patents

Abstract

PURPOSE: To restrict noise that is produced by a fact that many air bubbles are produced owing to vapor being entrained in a solution flowing down along a down pipe of a regenerator and are condensed and corrupsed in the course of their flowing down along the lowering pipe. CONSTITUTION: A distributor 40 is disposed at inlets of solution lowering pipes 23, 29 of regenerators 21, 24, and a solution 43 is lowered while turning along an inner peripheral wall 42 of the distributor 40. Thereupon, vapor 45 evaporated from the solution 43 is returned into the regenerators 21, 24 after passage through a central space part 44.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an absorption refrigerator.

[0002]

2. Description of the Related Art In a conventional absorption refrigerator, as shown in FIG. 2, a boiling solution 02 stored in the bottom of the regenerator 01 is lowered vertically connected to the bottom of the regenerator 01. Although it flows out through the pipe 03 as shown by the white arrow, the vapor on the liquid surface of the solution 02 flows down the downcomer pipe 03 at this time.
It is trapped inside and becomes a bubble 04 and flows out along with the solution 02.

When the solution 02 is cooled while the solution 02 flows down the downcomer 03, the bubbles 04 are condensed and crushed, which causes a large noise.

[0004]

SUMMARY OF THE INVENTION The present invention has been invented to solve the above-mentioned problems, and the gist thereof is an absorption type composed of a regenerator, a condenser, an evaporator, an absorber and the like. In the refrigerator, there is provided a distribution refrigerator at the inlet of the solution descending pipe of the regenerator, which is provided with a distributor that separates gas and liquid by causing the solution to flow down while swirling along the inner peripheral wall.

[0005]

In the present invention, the boiling solution stored in the bottom of the regenerator enters the distributor, and the bubbles in the solution are separated in the process of flowing down while swirling along the tube wall. The separated bubbles return to the regenerator through the central space of the distributor, and the solution separated from the bubbles flows out through the downcomer.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A system diagram of an absorption refrigerator according to an embodiment of the present invention is shown in FIG. Evaporator kept in high vacuum
10 A concentrated solution consisting of a refrigerant such as LiBr and an absorbent such as water stored in the inner bottom is extracted by a pump 11, sprayed from a nozzle 12 to a heat transfer tube 13 from above, and circulated in the heat transfer tube 13. It evaporates by exchanging heat with cold water to cool it. The cooled cold water is supplied to the low temperature load.

The refrigerant vapor evaporated in the evaporator 10 is absorbed by the absorber 14
Nozzle 15 located in the upper part of absorber 14
It becomes a dilute solution by being absorbed by the absorbing solution sprayed from. The reaction heat at this time is taken out by the cooling water circulating in the heat transfer tube 16 and supplied to the high temperature load.

The dilute solution accumulated at the bottom of the absorber 14 is pumped
After being extracted by 17, and heated in the process of flowing through the low temperature heat exchanger 18, the heat recovery device 19, and the high temperature heat exchanger 20 in this order,
By entering the high pressure regenerator 21 and exchanging heat with the heat source vapor flowing through the heat transfer tube 22, a part of the refrigerant in the dilute solution is evaporated and separated from the absorbing liquid.

The dilute solution stored in the bottom of the high pressure regenerator 21 flows out through the downcomer 23, is cooled in the process of passing through the high temperature heat exchanger 20, and then enters the low pressure regenerator 24. On the other hand, the refrigerant vapor separated from the absorbing liquid in the high pressure regenerator 21 is the low pressure regenerator 24.
It enters into the heat transfer tube 25 disposed in the lower part of the inner part, and is cooled by heating the dilute solution outside the tube in the process of flowing through the heat transfer tube 25 to become a liquid refrigerant.

As a result, the refrigerant evaporates and is separated from the dilute solution, and the dilute solution becomes almost only the absorbing liquid. Most of the separated refrigerant vapor enters the condenser 26, but part of it
Sent to 10.

On the other hand, the liquid refrigerant flowing out of the heat transfer tube 25 is sprayed from the nozzle 27 provided in the upper part of the condenser 26 to the heat transfer tube 28 from the upper part thereof, accompanied by the refrigerant vapor in the process of descending in the condenser 26. In the process of passing through the outer surface of the heat transfer tube 28, the refrigerant vapor is condensed by being cooled by the cooling water circulating in the tube.

The dilute solution stored in the bottom of the low-pressure regenerator 24 flows down the downcomer 29, is urged by the pump 30, cooled by the low-temperature heat exchanger 18, and then disposed in the absorber 14. Sprayed from nozzle 15.

The heat source vapor is condensed by passing through the heat transfer tube 22, passes through the steam trap 32 and the heat recovery device 19, becomes drain, and flows out of the system. A part of the dilute solution flowing out from the low temperature heat exchanger 18 is sent to the low pressure regenerator 24 via the pipe 33.

A distributor 40 is installed at the inlets of the downcomers 23 and 29, and the details of the distributor 40 are shown in FIG. The upper ends of the downcomers 23 and 29 are regenerators 2.
It is connected vertically to the bottom plate 35 of 1, 24. This downcomer 2
The lower part of a cylindrical distributor 40 is inserted into the inlets of 3 and 29, and the upper part thereof projects into the regenerators 21 and 24.

A plurality of (two in the figure) slits 41 are formed on the projecting portion of the distributor 40 over substantially the entire length thereof, and the slits 41 are inside the distributor 40 as shown in FIG. 1 (B). It extends tangentially to the peripheral wall 42.

However, the solution 43 in the boiling state stored in the inner bottom portions of the regenerators 21 and 24 flows into the distributor 40 through the plurality of slits 41 and descends while swirling along the inner peripheral wall 42 thereof. A space 44 is formed in the space. solution
The vapor 45 separated from the solution 43 by the contact of 43 with the inner peripheral wall 42 and cooling enters the central space portion 44, and this space portion
Ascends 44 and returns to the regenerators 21 and 24.

Thus, the vapor on the liquid surface of the solution 43 stored at the inner bottoms of the regenerators 21 and 24 can be prevented from being caught in the solution 43 and flowing into the downcomers 23 and 29 as in the conventional case, and descending. The vapor evaporated from the solution 43 in the process of flowing through the pipes 23 and 29 is also discharged through the central space 44, so the downcomer pipe 2
The number of bubbles 45 flowing through the insides of 3 and 29 is greatly reduced, so that the noise generated by the bubbles 45 condensing and collapsing can be reduced.

The case where the present invention is applied to an absorption refrigerator is described above, but the present invention is an exothermic reactor, an absorption reactor, a saturator, a cooler, a heating device, a heat recovery device, a pure medium liquid tank ,
It can also be applied to an absorption heat pump including a mixed medium liquid tank, and in this case, a distributor 40 similar to the above may be installed at the heat transfer tube liquid inlet of the vertical heat exchanger.

[0019]

According to the present invention, in the process in which the solution stored in the inner bottom of the regenerator descends while swirling along the inner peripheral wall of the distributor, the bubbles in the solution are separated and the separated bubbles are separated from the center of the distributor. Since it returns to the inside of the regenerator through the space formed in, the bubbles in the solution descending in the downcomer can be greatly reduced, and as a result, the noise caused by the bubbles can be reduced.

[Brief description of drawings]

1 shows an embodiment of the present invention, (A) is a longitudinal sectional view of an inlet portion of a downcomer pipe, (B) is a sectional view taken along line BB of (A).

FIG. 2 is a vertical sectional view corresponding to FIG. 1 (A) of a conventional absorption refrigerator.

FIG. 3 is a system diagram of an absorption refrigerator.

[Explanation of symbols]

 21, 24 Regenerator 23, 29 Downcomer 40 Distributor 41 Slit 43 Solution 44 Space 45 Air bubble

Claims (1)

[Claims] 1. An absorption refrigerating machine comprising a regenerator, a condenser, an evaporator, an absorber and the like, wherein the solution is swirled down along the inner peripheral wall at the inlet of the solution downcomer pipe of the regenerator, and vaporized. An absorption refrigerator that has a distributor for liquid separation installed.