JPH0478904B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an absorption refrigerator having an absorber below an evaporator.

[Conventional technology]

As shown in Figure 3, some absorption refrigerators have an evaporator 2 in the upper part and an absorber 1 in the lower part in one can body, and the refrigerant vapor generated in the evaporator 2 is It descends and enters the absorber 1, where it is absorbed by a solution that is sprayed and cooled by heat transfer tubes.

[Problems to be Solved by the Invention] However, in order to maintain a high heat transfer coefficient of the heat transfer tubes of the absorber, it is desirable to efficiently remove non-condensable gas from the absorber.

However, in the absorber 1 of the conventional absorption refrigerator described above, non-condensable gas accumulates near the upper center in the width direction of the heat exchanger tube array, resulting in a problem that efficient heat transfer is not performed.

The present invention aims to solve this problem, and aims to provide an absorption refrigerator equipped with an absorber that can efficiently eliminate non-condensable gas and efficiently transfer heat.

[Means for solving problems]

The present invention forms an absorption refrigeration cycle with an evaporator, an absorber, a regenerator, a condenser, a solution heat exchanger, a solution path and a refrigerant path connecting these, and the evaporator is placed below the evaporator in one can body. In the absorption refrigerator in which the absorber is arranged, a substantially vertically vertical partition plate parallel to the longitudinal direction of the heat transfer tube row is provided in the widthwise center of the heat transfer tube row in the absorber, and a gas flow path is provided. The gas flow path was divided into two parts, and the upper cross-sectional area was large and the lower cross-sectional area was small in each horizontal cross section, and a bleed pipe was arranged below the heat transfer tube group on the dilute solution surface. This is an absorption refrigerator characterized by the following.

〔Example〕 Embodiments of the present invention will be described using the drawings.

In Figure 1, 1 is an absorber, 2 is an evaporator, and 3
4 is a regenerator, 4 is a condenser, and 5 is a heat exchanger. These are connected by a solution path and a refrigerant path to form an absorption refrigeration cycle. 6 is a solution pump, and 7 is a refrigerant pump.

The absorber 1 and the evaporator 2 are formed in one can body, with the evaporator 2 in the upper part and the absorber 1 in the lower part.

The absorber 1 is provided with a substantially perpendicular partition plate 9 parallel to the heat exchanger tube rows at approximately the center in the width direction of the heat exchanger tube rows in the absorber 1, dividing the gas flow path into two. The lower end of the partition plate 9 is provided so as to be constantly immersed in the solution.

One partition plate 10 is provided on each side of the heat transfer tube group in the width direction of the heat transfer tube row.
The spacing of 0 is inclined so that the spacing at the top is large and the spacing at the bottom is small, so that the gas flow path has a large cross-sectional area at the top and a small cross-sectional area at the bottom in a horizontal section. Partition plate 10,1
The upper end of the 0 is located close to the can body, and the lower end is always immersed in a dilute solution.

Bleeding pipes 8 are provided below the heat transfer tube groups of each gas flow path formed by partition plates 9, 10, and 10, respectively, to extract noncondensable gas.

In this embodiment, the partition plates 9, 10, and 10 create an effective gas flow within the absorber 1, so that
Therefore, since the non-condensable gas can be effectively caused to flow down and removed, the heat transfer coefficient of the heat transfer tube group can be maintained at a high level. In other words, since the gas flow path is divided into two, a wide range of turbulent flow does not occur, and a nearly orderly flow occurs in the divided flow path, which prevents the accumulation of non-condensable gas, resulting in efficient heat transfer. It will be done.

In particular, non-condensable gas that tends to accumulate near the center top of the absorber 1 is difficult to accumulate because the flow path width is narrowed by the partition plate 9 and the gas flow flows smoothly over the entire cross section, making it more efficient than the bleed pipes 8 and 8. It is often excluded.

In addition, by immersing the partition plates 9, 10, and 10 in a dilute solution, it is possible to prevent the gas flow between the divided channels and to prevent the gas from entering through the gap between the partition plate 10 and the can body wall. is oriented in a constant direction from above to below, and the non-condensable gas can be collected in the vicinity of the bleed pipes 8, 8 and can be effectively extracted.

FIG. 2 shows an example in which, in place of the partition plates 10, 10 of FIG. 1, both sides of the absorber 1 have inclined walls 10', 10'.

Note that the partition plates 9, 10, and 10 do not necessarily need to be immersed in the dilute solution. Further, since the air bleed pipe 8 is not provided in each flow path, one may be provided in the center.

Although an embodiment of a so-called single-effect refrigeration cycle has been described above, it goes without saying that the present invention can also be applied to a multiple-effect type having a plurality of regenerators.

〔Effect of the invention〕

The present invention provides a partition plate parallel to the longitudinal direction of the heat exchanger tube row and substantially perpendicular to the upper and lower sides at approximately the center in the width direction of the heat exchanger tube row in the absorber to divide the gas flow path into two, and In the horizontal cross-section, each gas flow path has a large cross-sectional area at the top and a small cross-sectional area at the bottom, and a bleed pipe is placed above the dilute solution surface below the heat transfer tube group, so that the gas flow is divided and absorbed into the absorber. An orderly gas flow is generated parallel to the heat transfer tube group, preventing the accumulation of non-condensable gas, and also preventing the gas flow from going around between the divided flow channels, allowing air to be extracted, and the gas flow is from the top to the bottom. The non-condensable gas can be collected and extracted effectively, and the absorber can be made into an absorber in which the non-condensable gas is difficult to accumulate, so the heat transfer coefficient can be maintained at a high level, which has a remarkable effect in practical use. I can do it.

[Brief explanation of the drawing]

1 and 2 are an overall flow diagram and a partial flow diagram of different embodiments of the present invention, respectively, and FIG. 3 is a partial flow diagram of a conventional example. 1...absorber, 2...evaporator, 3...regenerator,
4... condenser, 5... heat exchanger, 6... solution pump, 7... refrigerant pump, 8... bleed pipe, 9... partition plate, 10... partition plate, 10'... inclined wall.

Claims (1)

[Claims] 1 evaporator 2, absorber 1, regenerator 3, condenser 4, and solution heat exchanger 5, and a solution path connecting these;
In an absorption refrigerator in which an absorption refrigeration cycle is formed in a refrigerant path and the absorber 1 is disposed below the evaporator 2 in one can body, approximately the center in the width direction of a row of heat transfer tubes in the absorber 1 is provided with substantially vertically vertical partition plates 9 parallel to the longitudinal direction of the heat exchanger tube row,
The gas flow path is divided into two parts, each of which has a large upper cross-sectional area and a lower lower cross-sectional area in a horizontal cross-section, and a bleed pipe is placed above the dilute solution surface below the heat transfer tube group. An absorption refrigerator characterized by being equipped with 8.