JPH11118276A - Absorption refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorption refrigerator that has a less number of components, has a simple structure and can be manufactured easily, and is compact, lightweight, and less expensive. SOLUTION: In an absorption refrigerator where an absorber, an evaporator, a reproducer, a condenser, and a heat exchanger are accommodated in one can drum, they have a group of heat transfer pipes consisting of a number of heat transfer pipes that form straight pipes each and at the same time a group of heat transfer pipes are fixed to the pipe plate of both edges of the can drum, and a coolant is allowed to flow from a group of heat transfer pipes of the absorber into those of the evaporator, one water room 18 for connecting one edge of a group of heat transfer pipes 17 of an absorber A to that of a group of heat transfer pipes 14 of a condenser C is provided outside a can drum 1, and a water room 18 is used as the channel of a coolant that flows from a group of heat transfer pipes 17 of the absorber A to a group of heat transfer pipes 14 of the condenser C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an absorption refrigerator.
In particular, the present invention relates to improvement of a flow path of cooling water flowing from an absorber constituting an absorption refrigerator to a condenser.

[0002]

2. Description of the Related Art FIG. 3 is a diagram showing an example of a schematic sectional structure of a conventional absorption refrigerator of this type. As shown in the figure, an absorber A, an evaporator E, a regenerator G, and a condenser C are housed in one rectangular can body 1. That is, an absorber A is arranged at the lower part of the can body 1, an evaporator E is arranged at an oblique upper part of the absorber A, a condenser C is arranged at the upper part, and a regenerator is arranged at the upper part of the condenser C. G is arranged. Then, the low-pressure side of the absorber A and the evaporator E and the high-pressure side of the regenerator G and the condenser C are divided by the diagonal partition walls 2 arranged obliquely. A passage 3 through which refrigerant vapor flows is disposed, and a passage 4 through which refrigerant vapor flows from the evaporator E to the absorber A is disposed below the diagonal partition wall 2.

In the absorption refrigerator having the above structure, the absorber A
Absorbs the refrigerant vapor from the evaporator E into the concentrated solution sprayed by the spray pipe 11, and the concentrated solution having absorbed the refrigerant vapor becomes a dilute solution. The dilute solution is sprayed into the regenerator G from the spray pipe 13 through the pipe 5, the heated side of the heat exchanger X and the pipe 6 by the solution pump SP. The sprayed dilute solution is heated by a heat source flowing in the heat transfer tube group 12, and the refrigerant evaporates to a concentrated solution. The concentrated solution is sprayed into the absorber A from the spray tube 11 through the tube 7 through the heating side of the heat exchanger X and the tube 8. Thereby, the dilute solution in the absorber A circulates. In addition, 17 is a heat transfer tube group of the absorber A.

The refrigerant vapor evaporated in the regenerator G passes through the passage 3, is cooled in the condenser C by the cooling water flowing in the heat transfer tube group 14, becomes a refrigerant liquid, and flows into the evaporator E from the pipe 9. In the evaporator E, the refrigerant liquid is sprayed from the spray pipe 15 through the pipe 10 by the refrigerant pump RP. The sprayed refrigerant liquid removes heat from the cold water flowing in the heat transfer tube group 16 and evaporates to become refrigerant vapor. The cold water deprived of heat and having a low temperature is supplied for cooling or the like. The evaporated refrigerant vapor flows into the absorber A through the passage 4 and is absorbed by the concentrated solution sprayed from the spray pipe 11 as described above.

In the absorption refrigerator having the above structure, the absorber A
The heat transfer tube group 17 and the heat transfer tube group 14 of the condenser C and the like are constituted by a large number of heat transfer tube groups forming a straight tube, through which an external fluid such as cooling water flows, and a cycle fluid (refrigerant, absorption solution) of the absorption refrigerator. Heat exchange is performed between the heat transfer tube group 17 and the heat transfer tube group 14 so that the flow rate of the cooling water flowing through the heat transfer tube group 17 and the heat transfer tube group 14 is adjusted to an appropriate value of about 2 to 3 m / s. There is a need to. For this purpose, the heat transfer tube group is divided into several parts and configured in multiple passes.

In the case where the heat transfer tube group is divided into several parts as described above and configured in multiple passes, the cooling water is introduced into the first pass of the absorber A, and then flows through the second pass and the third pass sequentially, and from there. It is necessary to make it flow to the first pass of the condenser C. Therefore, conventionally, as shown in FIG. 4, a water chamber 31 and a water chamber 32 are provided outside the can bodies of the absorber A and the condenser C, respectively, and both ends of the heat transfer pipe divided into the multi-pass are connected to the water chamber. At the same time, the water chamber is appropriately divided into a plurality of partitions by a partition plate so that the cooling water flows sequentially from the first pass to the second pass and the third pass. The water chamber 32 was connected by a connecting pipe.

[0007]

SUMMARY OF THE INVENTION Absorber A and condenser C
When the above-described configuration is adopted to introduce the cooling water into the heat transfer tube group 17 and the heat transfer tube group 14, even if the absorber A and the condenser C are adjacent to each other as shown in FIG. A water chamber 31 communicating with the heat transfer tube group 17 of the absorber A and a water chamber 32 communicating with the heat transfer tube group 14 of the condenser C are provided on the outer wall of the can body 1, and the water chamber 31 and the water chamber 32 are connected. A structure of connecting with a pipe (not shown) is adopted. As a result, the number of components increases, the number of man-hours increases, and the cost increases.At the same time, the connecting pipe connecting the water chambers protrudes in the longitudinal direction of the can body, which increases the size of the absorption refrigerator and reduces the size. In addition, there is a problem that it becomes an obstacle to weight reduction.

FIGS. 4A and 4B show the appearance of the absorption refrigerator. FIG. 4A is a front view, FIG. 4B is a left side view, and FIG. 4C is a right side view. Reference numeral 34 denotes a steam chamber of the regenerator G, and reference numeral 33 denotes a water chamber of the evaporator E.

The present invention has been made in view of the above points, and solves the above-mentioned problems, has few constituent members, has a simple structure, is easy to manufacture, and is suitable for miniaturization, weight reduction, and cost reduction. It is an object to provide a simple absorption refrigerator.

[0010]

In order to solve the above-mentioned problems, the present invention is to dispose an absorber at a lower part in one rectangular can body, and arrange an evaporator at an oblique upper part of the absorber. A condenser is arranged at the top, and a regenerator is further arranged at the top of the condenser. The absorber, evaporator, regenerator and condenser have a heat transfer tube group consisting of a number of heat transfer tubes each forming a straight tube. The heat transfer tube group is fixed to tube plates at both ends of the can body, and cooling water flows from the heat transfer tube group of the absorber to the heat transfer tube group of the evaporator. A water chamber for communicating one end of the heat transfer tube group of the condenser with the other end of the heat transfer tube group of the condenser, and passing the water chamber through a plurality of paths of the heat transfer tube group of the absorber to a path of the heat transfer tube group of the condenser. A partition plate is provided in the water chamber so as to form a flow path of cooling water to flow.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an absorber and a condenser of the absorption refrigerator of the present invention. As shown in the drawing, an absorber A is disposed at a lower portion of the can body 1, and a condenser C is disposed adjacent to the upper portion thereof. The absorber A includes a heat transfer tube group 17 including a number of straight heat transfer tubes, and the condenser C includes a heat transfer tube group 14 including a number of straight heat transfer tubes.

The heat transfer tubes of the heat transfer tube group 17 of the absorber A and the heat transfer tubes of the heat transfer tube group 14 of the condenser C are fixed to the tube plates 1a and 1b on both sides of the can body 1, respectively. The heat transfer tube group 17 of the absorber A is divided into a plurality of paths such as a first path 17-1, a second path 17-2, and a third path 17-3. Further, the heat transfer tube group 14 of the condenser C forms one path 14-1. In addition, a water chamber 19 is provided in one of the tube sheets 1a in the absorber A portion, to which one end of the heat transfer tube group 17 communicates, and one end of the heat transfer tube group 14 is in communication with one tube sheet 1a in the condenser C portion. A water chamber 20 is provided.

The other tube sheet 1b of the absorber A portion and the condenser C portion is provided with one water chamber 18 in which one end of the heat transfer tube group 17 and one end of the heat transfer tube group 14 communicate with each other. . Further, a cooling water inlet 21 is provided in the water chamber 19, and the cooling water flowing from the cooling water inlet 21 flows into the first path 17-1 and the cooling water flowing out from the second path 17-2. A partition plate 23 is provided so that water flows into the third path 17-3. The cooling water flowing out of the first path 17-1 flows into the second path 17-2 inside the water chamber 18, and the cooling water flowing out of the third path 17-3 flows into the heat transfer tube 14 of the condenser C. A partition plate 22 is provided so as to flow through the path 14-1. Further, the water chamber 20 is provided with a cooling water outlet 24.

From the cooling water inlet 21 to the partition plate 23 of the water chamber 19
The cooling water that has flowed into one of the chambers 19-1, which is divided by the first path 17-1 of the heat transfer tube group 17 of the absorber A, passes through the water chamber 1.
8 flows into one of the chambers 18-1 divided by the partition plate 22, and further passes through the second path 17-2 and the other chamber 19- of the water chamber 19.
2. The other chamber 18-2 of the water chamber 18, the path 14 of the condenser C
-1, flows through the water chamber 20 and the cooling water outlet 24; That is, from the heat transfer tube group 17 of the absorber A to the heat transfer tube group 1 of the condenser C
The flow path of the cooling water flowing into 4 is constituted by one water chamber. In addition, the number of passes of the absorber A and the number of passes of the condenser C are not limited to the above example, and may be appropriately determined in consideration of the flow velocity of the flowing cooling water. In addition, the number of partition plates provided in the water chambers 18, 19, 20 is determined according to the number of passes.

By adopting the above structure, the portion of the absorber A of the tube sheet 1b and the condenser C as shown in FIG.
The water chamber 31 and the water chamber 32 are provided in each of the parts, and the number of constituent members is reduced, the structure is simplified, the manufacturing man-hour is reduced, and the cost is reduced, as compared with a structure in which both water chambers are connected by a connecting pipe. Down can be achieved. Further, since the connecting pipe is not used, the size of the can body of the absorption refrigerator in the longitudinal direction is reduced, so that the size can be reduced and the weight can be reduced.

FIG. 2 is a view showing the appearance of the absorption refrigerator of the present invention. FIG. 2 (a) is a front view, FIG. 2 (b) is a left side view, and FIG. 2 (c) is a right side view. As shown in the drawing, one water chamber 18 is provided on the outside (tube sheet) of the can body 1 where the absorber A and the condenser C are located, and the inside thereof is the heat transfer tube group of the absorber A as shown in FIG. One end of 17 and one end of the heat transfer tube group 14 of the condenser C communicate with each other. Reference numeral 34 denotes a steam chamber of the regenerator G, and reference numeral 33 denotes a water chamber of the evaporator E.

[0017]

As described above, according to the present invention, one water chamber for connecting one end of the heat transfer tube group of the absorber and one end of the heat transfer tube group of the condenser to each other is provided outside the can body. The partition plate is provided in the water chamber so that the cooling water flows through the plurality of paths of the heat transfer tube group of the absorber to the path of the heat transfer tube group of the condenser. An excellent effect is obtained that it is possible to provide an absorption refrigerator that is simple, easy to manufacture, and suitable for miniaturization, weight reduction, and cost reduction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an absorber and a condenser of an absorption refrigerator of the present invention.

FIG. 2 is a view showing the appearance of an absorption refrigerator of the present invention, wherein FIG. 2 (a) is a front view, FIG. 2 (b) is a left side view, and FIG. 2 (c) is a right side view.

FIG. 3 is a diagram showing a schematic cross-sectional structure example of a conventional absorption refrigerator.

4 (a) is a front view, FIG. 4 (b) is a left side view, and FIG. 4 (c) is a right side view.

[Explanation of symbols]

 Reference Signs List A absorber E evaporator G regenerator C condenser SP solution pump RP refrigerant pump 14 heat transfer tube group 17 heat transfer tube group 18 water chamber 19 water chamber 20 water chamber 21 cooling water inlet 22 partition plate 23 partition plate 24 cooling water outlet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobutaka Matsuda 11-1 Haneda Asahimachi, Ota-ku, Tokyo Inside Ebara Works Co., Ltd. (72) Inventor Teruo Shiraishi 11-1 Haneda Asahimachi, Ota-ku, Tokyo Inside Ebara Corporation (72) Inventor Jun Murata Inside Ebara Corporation, 11-1 Asahi-cho, Haneda, Ota-ku, Tokyo

Claims (1)

[Claims] 1. An absorber is disposed at a lower part in one rectangular can body, and an evaporator is disposed at an oblique upper part of the absorber.
A condenser is arranged at the top, and a regenerator is further arranged at the top of the condenser. The absorber, evaporator, regenerator and condenser have a heat transfer tube group consisting of a number of heat transfer tubes each forming a straight tube. And the heat transfer tube group is fixed to tube plates at both ends of the can body, and the cooling water flows from the heat transfer tube group of the absorber to the heat transfer tube group of the evaporator. One water chamber for connecting one end of the heat transfer tube group and one end of the heat transfer tube group of the condenser to each other is provided outside the can body,
A partition plate is provided in the water chamber so that the water chamber passes through a plurality of paths of the heat transfer tube group of the absorber and serves as a flow path of cooling water flowing to a path of the heat transfer tube group of the condenser. Absorption refrigerator.