JPH11337227A - Integration type heat exchanger combining evaporator, absorber and supercooler and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method which achieves a higher quality at a lower cost by allowing miniaturization with a higher performance in an integration type heat exchanger combining an evaporator, an absorber and a supercooler. SOLUTION: A manufacturing method of a combined integration type heat exchanger comprises the following processes (1)-(5). (1) At two casing parts composing a casing of the integration type heat exchanger, tanks 3a and 4a and lids 3b and 4b are prepared with communication ports 3c and 4c formed at one side part. (2) There are prepared a first assembly U1 wherein a lid 3b and a core part 5a of an evaporator are integrated by soldering, a second assembly U2 wherein a lid 4b and a core part 6a of an absorber are integrated by soldering, a third assembly U3 wherein a condensed refrigerant atomization tube 9 or the like is soldered on the tank 3a, a fourth assembly U4 wherein a tank 4a, a dense absorbing liquid atomization tube 10 and the like are soldered and a fifth assembly U5 comprising a supercooler 7 is prepared, (3) the assemblies U1 and U2 are integrated by soldering. (4) The assemblies U3 -U5 are mounted on the those and in the process (3) to be temporarily assembled. (5) The mutual contact parts of the assemblies U1 -U2 as temporary assembly in the process (4) are welded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an integrated heat exchanger comprising a combination of an evaporator, an absorber and a subcooler used in an absorption refrigerator, and more particularly to a heat exchanger having excellent heat exchange performance and a compact structure. The present invention relates to an inexpensive and high-quality manufacturing method of a heat exchanger with a combined evaporator, absorber and subcooler that can be made into a single unit.

[0002]

2. Description of the Related Art Conventionally, evaporators, absorbers, subcoolers and the like of absorption refrigerators are often constituted by tubular heat exchangers. ,
Installed inside the body of a single-body or twin-body absorption refrigerator, or installed independently outside the body, between each other,
It is connected by a passage in the fuselage or by piping.

[0003] Therefore, in the production of an absorption refrigerator, heat exchangers such as an evaporator, an absorber, and a subcooler are separately manufactured, and these are individually attached and fixed inside or outside the body. , And then perform the required plumbing,
A lot of additional work is required, such as installing a partition plate.
The production and assembly of these heat exchangers, and the production of the heat exchanger part of the absorption chiller, are troublesome, and furthermore, there have been problems such as an increase in the size and complexity of the structure.

[0004] The applicant of the present invention has previously filed a patent application for the invention of an integrated heat exchanger combining an evaporator, an absorber and a subcooler as described below in order to solve these problems. (Japanese Patent Application No. 9-34963).

That is, according to the present invention, the evaporator, the absorber and the subcooler are each constituted by a multi-plate heat exchanger. A plurality of elements formed by laminating plate-like bodies are overlapped, the space inside each element is used as a passage for passing one heat transfer medium, and the space between each element is passed through the other heat transfer medium. The subcooler is formed integrally with the evaporator or the upper part of the absorber in a continuous manner, and the absorber, the integrally formed evaporator and the subcooler, An evaporator, an absorber and a subcooler are combined and integrated into a multi-plate heat exchanger, which is accommodated in a casing separated by a partition plate, assembled together, and then brazed. .

According to the present invention, the above problems can be solved to a sufficiently satisfactory degree, but on the other hand, the recovery of heat possessed by the evaporated refrigerant (refrigerant vapor) generated in the evaporator is still insufficient. However, since the temperature of the condensed refrigerant exiting the supercooler does not drop sufficiently, the cooling performance of the brine and the absorption performance of the evaporated refrigerant cannot be said to be sufficiently satisfactory, and there is still a point to be improved. .

[0007] Further, a wasteful space is formed above the evaporator or the absorber on the side where the supercooler is not connected to the upper part thereof, and the structure of the heat exchanger is correspondingly increased, so that it is still used. There was room for miniaturization.

Therefore, as a combined heat exchanger of an evaporator, an absorber and a subcooler which can solve these problems, the casing of the heat exchanger is composed of two casing parts, and the two casing parts are Are communicated through an upper communication port, are separated by an insulating gap below the communication port, and an evaporator is housed in one of the two casing parts, and the two casing parts An absorber is housed in the other casing part of the above, and a subcooler is horizontally disposed so as to cross the communication port and to span the upper part of the evaporator and the upper part of the absorber. A structure with a different structure is conceivable.

[0009] The combined heat exchanger of the evaporator, the absorber and the subcooler having such a structure solves the above-mentioned problems, thereby improving the heat exchange performance and reducing the size of the structure, and furthermore, the absorption refrigeration. It is possible to improve the coefficient of performance of the machine and further downsize the structure.

The present invention provides an inexpensive and high-quality manufacturing method of an integrated heat exchanger including a combination of an evaporator, an absorber, and a subcooler having such excellent effects. Make it an issue.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a method for manufacturing a combined heat exchanger comprising an evaporator, an absorber and a subcooler, which solves the above-mentioned problems. In the invention described in the above, the casing of the combined integral heat exchanger is composed of two casing parts, and the two casing parts are communicated through an upper communication port, and a heat insulating gap below the communication port is formed. An evaporator is housed in one of the two casing parts, an absorber is housed in the other of the two casing parts, and a subcooler is A method for manufacturing a combined heat exchanger including a combination of an evaporator, an absorber, and a subcooler, which is horizontally disposed so as to cross over the upper part of the evaporator and the upper part of the absorber across the communication port. In Te is the evaporator, the absorber and the manufacturing method of the subcooler combination integrated heat exchanger, characterized in that comprising the step of the next ~. Two types of tanks, each of which constitutes each of the two casing portions, and a plate that covers the opening of the tank are prepared, and the communication port is formed on one side of each plate. A first assembly in which the plate, which is a component of the one casing portion, and a core portion of the evaporator are integrated by brazing; a plate, which is a component of the other casing portion, and the absorber; The required pipes, such as a condensing refrigerant spray pipe, were integrally fixed by brazing to the second assembly in which the core portion of the above was integrated by brazing and the tank which was a component of the one casing portion. A fourth assembly in which required pipes, such as a spray pipe for a concentrated absorbent and an outlet pipe for a diluted absorbent, are integrally fixed to the third assembly and the tank, which is a component of the other casing part, by brazing.
And the subcooler is composed of a flat heat exchanger integrally assembled by brazing.
And an assembly. The plates of the first assembly and the second assembly face each other, and the two assemblies are fixed together by brazing and assembled. The fifth assembly is disposed so as to cross the communication opening formed in each plate in the integrated assembly of the process, and the remaining third assembly and the fourth assembly are assembled. And temporarily assemble the combined heat exchanger. The abutting portions between the respective assemblies in the temporary assembly in the process are TIG-welded except for the brazed portions.

The first aspect of the present invention is configured as described above, and the combined heat exchanger including the evaporator, the absorber, and the subcooler has the following structure. That is, the casing of the heat exchanger is composed of two casing parts, the two casing parts are communicated through the upper communication port, and are separated through the adiabatic gap below the communication port. An evaporator is accommodated in one of the casing portions, and an absorber is accommodated in the other casing portion of the two casing portions, and a subcooler is provided across the communication port, It is disposed horizontally so as to straddle the upper part of the evaporator and the upper part of the absorber.

As a result, the heat transfer area of the subcooler can be made sufficiently large, and the condensed refrigerant flowing in the subcooler and the evaporative refrigerant generated in the evaporator are cross-flow heat generated in an orthogonally opposed flow. The heat exchange between the evaporator and the absorber can be prevented by the heat insulation between the evaporator and the absorber due to the heat insulating gap below the communication port. The cooling performance of the brine is improved, and the absorption of the evaporated refrigerant in the absorber is promoted, so that the coefficient of performance of the absorption refrigerator is improved.

[0014] Further, no empty space is generated in the space above the evaporator and the absorber, and the space efficiency is improved, and the further structure of the combined heat exchanger of the evaporator, the absorber and the subcooler is integrated. , And further downsizing of the structure of the absorption refrigerator.

[0015] The supercooler, which is disposed horizontally across the communication port of the two casing portions and spans the upper part of the evaporator and the upper part of the absorber, functions as an eliminator. The droplets contained in the evaporative refrigerant generated in the evaporator are separated to prevent the evaporative refrigerant from leaving the evaporator with the droplets. It prevents well from being mixed into the evaporator side by rebound.

Further, a method for manufacturing a combined heat exchanger having a combination of an evaporator, an absorber and a subcooler, which has various effects as described above, is constituted by the above-described steps. As a result, the first to fifth assemblies manufactured using the brazing means are prepared, and the first assembly and the second assembly are integrally fixed by brazing, and then assembled. Assembling the remaining third assembly to fifth assembly with this integrated assembly, temporarily assembling the combined integrated heat exchanger, and performing TIG welding of the abutting portion (excluding the brazed portion). As a result, an evaporator, an absorber and a subcooler can be manufactured at once, so that an integrated heat exchanger can be manufactured.
The productivity is improved, and the manufacturing cost can be reduced.

Further, the main parts constituting the combined heat exchanger of the evaporator, the absorber and the subcooler are integrated into five assemblies, and after these five assemblies are manufactured, these five assemblies are manufactured.
Combining the two assemblies into the final product, the result is an extremely low-reject-rate, robust, and high-quality combined evaporator, absorber and subcooler integrated heat exchanger. Can be

Further, by configuring the invention according to claim 1 as described in claim 2, the evaporator and the absorber are
It consists of a multi-plate heat exchanger.
Since each of the heat exchangers is constituted by an AND tube heat exchanger, it is possible to easily manufacture each of these heat exchangers by using brazing means.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the invention described in claims 1 and 2 of the present application shown in FIGS. 1 to 18 will be described below. FIG. 1 is a front view of a combined integrated heat exchanger of an evaporator, an absorber, and a subcooler in the present embodiment, in which a front cover portion is cut away, and FIG.
1 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG.
FIG. 5 is a partially enlarged view of FIG. 1, and FIG. 6 is a sectional view of a tank which is a component of one of the casings constituting the casing of the combined integrated heat exchanger of FIG. 1. FIG. 7 is a right side view of FIG. 6, and FIG.
9 is a sectional view taken along line VIII-VIII of FIG. 9, FIG. 9 is a longitudinal sectional view of a plate which is a component of the same casing part, FIG. 10 is a right side view of FIG. 9, and FIG. FIG. 12 is a longitudinal sectional view of a tank which is a component of the other casing part constituting the casing of the integrated heat exchanger.
Is a left side view of FIG. 11, and FIG.
FIG. 14 is a cross-sectional view taken along line XIII. FIG. 14 is a longitudinal cross-sectional view of a plate that is a component of the other casing part.
5 is a left side view of FIG. 14, FIG. 16 is a view showing one manufacturing process of the combined integrated heat exchanger of FIG. 1, FIG. 17 is a view showing another manufacturing process, and FIG. FIG. 5 is a partially enlarged view of FIG. 5 showing a joining state by TIG welding.

As shown in FIGS. 1-4,
In the combined integrated heat exchanger 1 of the evaporator, the absorber and the subcooler in the present embodiment, the casing 2 is composed of two casing parts 3, 4, and these two casing parts 3, 4 will be described later. They are communicated via rectangular openings (upper communication ports) 3c, 4c formed above the plates 3b, 4b, and are separated from each other by an insulating gap B below the rectangular openings 3c, 4c.

The two casing parts 3, 4 are, in fact, tanks 3a, 4a, respectively, and these tanks 3a
A plate 3b, 4b that covers the opening of 4a
It consists of a combination with

The tanks 3a, 4a are formed by drawing, and the depth of the tank 4a is deeper than the depth of the tank 3a. The detailed structures of the tanks 3a and 4a are shown in FIGS.
-13.

The plates 3b, 4b have substantially the same shape and the same size, are formed by press working, and in FIG.
As shown better in FIGS. 9, 10, 14 and 15, elongated rectangular openings 3c, 4c are formed. FIGS. 9, 10, 14, and 15 show the detailed structure of the plates 3b, 4b, respectively.

An upright piece 3d is bent at the inner peripheral edge of the opening 3c, and the upright piece 3d just fits into the inner peripheral edge of the opening 4c. Thus, in terms of the presence or absence of the standing piece 3d,
The shapes of the plates 3b, 4b are different, but otherwise there is no difference in the shape of the plates 3b, 4b.

Therefore, as shown in FIG. 1, when the two casing parts 3, 4 are connected such that the plates 3b, 4b are back-to-back, the standing pieces 3d on the inner peripheral edge of the opening 3c. Is fitted into the inner peripheral edge of the opening 4c, and the space region A ₃ above the inside of the casing portions 3, 4
A ₄ is brought directly communicated through the ring shaped upright piece 3d of the inner peripheral edge of the opening 3c.

The wall surfaces of the plates 3b, 4b below the openings 3c, 4c face each other via a heat insulating gap B consisting of a small gap. Reference numerals 20 and 20 denote protrusions formed at two lower portions of the plates 3b and 4b to keep the heat insulating gap B at a predetermined interval (FIG. 1).
0, see FIG. 15).

The evaporator 5 is accommodated in one casing part 3 of the casing 2 assembled from the two casing parts 3 and 4 in this manner, and the absorber 6 is accommodated in the other casing part 4. Is housed. Although not shown in detail, the evaporator 5 and the absorber 6 are constituted by a multi-plate heat exchanger.

The supercooler 7 comprises two casing parts 3,
An opening 3c of a plate 3b corresponding to a communication port above
It is arranged horizontally across the upper part of the evaporator 5 and the upper part of the absorber 6 across 4c. As shown in FIGS. 1 and 2, the subcooler 7 is constituted by a flat radiator type fin-and-tube heat exchanger.

In the subcooler 7, a portion slightly rightward from the center in FIG. 1 is supported by a lower edge of the opening 3c of the plate 3b, and a header portion on the left side is a condensed refrigerant inlet pipe 7a. Is supported on the bottom wall of the tank 4a through
The header portion on the right side is supported on the bottom wall of the tank 3a via an outlet pipe 7b for the condensed refrigerant. An inlet pipe 7a and an outlet pipe 7b for the condensed refrigerant penetrate the bottom walls of the tanks 4a and 3a in an airtight manner.

In one casing portion 3, in the space between the right portion of the subcooler 7 and the evaporator 5, the condensed refrigerant that has exited the subcooler 7 and has been decompressed by the expansion valve 8 is disposed. A spray pipe 9 is attached through the bottom wall of the tank 3a in an airtight manner. As shown in FIG. 3, the spray pipe 9 forms a T-shaped pipe, and the condensed refrigerant is sprayed uniformly onto the evaporator 5 from a pipe part which is vertically branched in FIG.

In the other casing part 4, in the space between the left part of the subcooler 7 and the absorber 6, there is provided a spray pipe of a concentrated absorbent absorbed by leaving a regenerator (not shown). 10 is mounted airtightly through the bottom wall of the tank 4a. As shown in FIG. 3, this spray pipe 10 also forms a T-shaped pipe, and sprays the concentrated absorbent uniformly onto the absorber 6 from a pipe part vertically branched in FIG. .

The brine enters the evaporator 5 through an inlet pipe 11 below it and flows out through an outlet pipe 12 above it.
During this time, the heat of evaporation is taken away by the condensed refrigerant sprayed from the spray pipe 9 and cooled.

The cooling water flows into the absorber 6 from an inlet pipe 13 below it and flows out from an outlet pipe 14 above it. During this time, the concentrated absorbing liquid sprayed from the spray pipe 10 is
While absorbing the evaporative refrigerant (refrigerant vapor) generated in the above, it becomes a rare absorbing liquid and accumulates at the bottom of the casing portion 4. The diluted absorption liquid collected at the bottom is sent to the next-stage regenerator via the outlet pipe 15.

The evaporative refrigerant (temperature of 10 ° C.) generated in the evaporator 5 moves to the next absorber 6 and is first absorbed in the concentrated absorbing liquid before the space region above the casing portion 3. in the a _3, it flows in a direction perpendicular to the condensing refrigerant flowing through the right portion of the subcooler 7, do this and heat exchange.

[0035] Then, in the space above the area A ₄ of the casing part 4, flows in a direction perpendicular to the condensing refrigerant flowing through the left portion of the subcooler 7, do this and heat exchange. In this manner, heat is exchanged between the evaporative refrigerant and the condensed refrigerant by the orthogonal counterflow method.

During this time, the temperature of the condensed refrigerant is reduced from 50 ° C. at the inlet to 35 ° C. at the outlet. This temperature is several degrees lower than in the case where the conventional combined heat exchanger is used, and the cooling performance of the brine in the evaporator 5 is improved accordingly.

On the other hand, the temperature of the evaporative refrigerant exiting the right portion of the subcooler 7 rises to 20 ° C., and then the temperature of the evaporative refrigerant exiting the left portion and going to the absorber 6 rises to 40 ° C. Although the temperature has risen, this temperature is also several degrees lower than in the case where the conventional combined integrated heat exchanger is used, so that the load on the cooling water of the absorber 6 is reduced, and the absorption efficiency is reduced. Have been improved.

In FIG. 3, reference numeral 16 denotes a concentrated absorption liquid spray tube, which is attached at the same height as the spray tube 10;
Is appropriately used when the spray of the concentrated absorbent due to the above does not sufficiently reach the end of the absorber 6.

Reference numeral 17 denotes a boss for attaching and fixing a drain discharge pipe collected at the bottom of the casing portion 3;
Is a boss for mounting and fixing the supporting stays of the evaporator 5 and the absorber 6, and 19 is a boss for mounting the instrument.

Next, a method of manufacturing the combined heat exchanger 1 including the evaporator 5, the absorber 6, and the subcooler 7 in the present embodiment will be described. First, tanks 3a, 4a constituting each of the two casing parts 3, 4, and plates 3b, 4b for covering the openings of the tanks 3a, 4a.
Are prepared, and openings (communication ports) 3c, 4c are formed in one side of the plates 3b, 4b (step).

Next, the tanks 3a and 4a are played.
Using the bases 3b and 4b as a base material and using brazing means,
First assembly U as described below₁Or the fifth assembly
Body U _Five(Process).

That is, as shown in FIG. 16, the core portion 5 of the evaporator 5 is provided at a predetermined position on the plate 3b.
a is integrally fixed and attached by brazing to produce a _first assembly U1. A brine inlet pipe 11 and an outlet pipe 12 are also fixedly attached to the core portion 5a by brazing.

FIG. 16 shows the plate 4b.
So that the core part 6a of the absorber 6 is
The second assemble is fixedly attached by brazing and attached.
Body U _TwoTo manufacture. Into this core portion 6a, cooling water is introduced.
The mouth tube 13 and the outlet tube 14 are also fixed together by brazing.
Attached.

As shown in FIG. 17, necessary pipes such as a condensed refrigerant spray pipe 9 and a drain discharge pipe mounting boss 17 are integrally fixed to the tank 3a by brazing, as shown in FIG. Te, to produce a third assembly U _3.

Further, as shown in FIG. 17, a spray pipe 10 for the concentrated absorbent and an outlet pipe 1 for the diluted absorbent are provided in the tank 4a.
5. The required pipes such as the instrument mounting boss 19 are integrally fixed and attached by brazing to manufacture the _fourth assembly U4.

The first to fourth assemblies U _{1 to} U 4
In parallel with preparation of the assembly U ₄ of the subcooler consisting flat radiator type fin-and-tube heat exchanger, manufactured similarly by using a brazing means, the fifth assembly U Have ₅ ready.

The above brazing employed in the preparation of the first assembly U ₁ to fifth assembly U _5, when construction material is F _e or SUS is C _u brazing or N _i Brazing, and if the component is _Al ,
Normal clad brazing is employed.

As described above, when the first to fifth assemblies U _{1 to} U ₅ are manufactured and prepared, then, as shown in FIG. _first and second of each plate 3b of the assembly U _2, is opposed to 4b comrades, assembled by fixing together both of these assemblies U _1, U ₂ by brazing, integrally assembly (U ₁ + U ₂₎ (Process). In this step, the projections 20, 20 are also brazed.

Next, the fifth assembly U ₅ is arranged so as to cross the openings 3 c, 4 c formed in the plates 3 b, 4 b of the integrated assembly (U ₁ + U ₂ ), and the remaining third assembly U ₅ assembling the assembly U ₃ and a fourth assembly U _4, to pre-assembled combinations integrated heat exchanger 1 as illustrated in Figure 1 (step).

In this temporary assembly, the brine inlet pipe
11, the outlet pipe 12, the condensed refrigerant outlet pipe 7b, the cooling water inlet pipe 13, the outlet pipe 14, and the condensed refrigerant inlet pipe 7a
a, holes 21, 22, 24 (see FIG. 7), tank 4a
Are inserted through holes 25, 26, and 28 (see FIG. 12).

In FIG. 7, the hole 23 is a hole for mounting the spray tube 9 for the condensed refrigerant, in FIG. 12, the hole 27 is a hole for mounting the spray tube 10 for the concentrated absorbent, and the hole 29 is a meter mounting hole. Hole for mounting the boss.

In this way, the combined integrated heat exchanger 1
Provisional when assembled is made, then, the first assembly U ₁ and the contact portion T ₁ through T ₄ of the third assembly U _3, a second assembly U of
₂ and the fourth assembly U ₄ and the contact portion T ₅ through T _8, the third assembly U ₃ of the contact portion T ₉ of the fifth assembly U _5, the fourth assembly U ₄ When subjected to respectively TIG welding to the fifth contact portion T ₁₀ of the assembly U ₅ of (step). Corresponding portion of the contact portion T ₁ through T ₁₀ are, are shown in Figure 1, enlarged view of the contact portion T ₃ is shown in Figure 18. As described above, the combined integrated heat exchanger 1 including the evaporator 5, the absorber 6, and the subcooler 7 is completed.

The integrated heat exchanger 1 comprising the combination of the evaporator 5, the absorber 6, and the subcooler 7 and the method of manufacturing the same according to the present embodiment have the following effects. be able to.

The casing 2 of the combined integrated heat exchanger 1
Consists of two casing parts 3, 4, which are communicated via openings (upper communication ports) 3c, 4c formed in the upper part of the plates 3b, 4b. The subcooler 7 is separated by an adiabatic gap B below the openings 3c and 4c, and crosses the opening 3c while being supported by the upstanding pieces 3d on the inner peripheral edge of the opening 3c.
It is arranged horizontally so as to straddle the upper part of the evaporator 5 and the upper part of the absorber 6.

As a result, the heat transfer area of the subcooler 7 can be made sufficiently large, and the condensed refrigerant flowing in the subcooler 7 and the evaporative refrigerant generated in the evaporator 5 are orthogonally opposed to each other. Heat exchange between the evaporator 5 and the absorber 6 due to the adiabatic gap B below the openings 3c, 4c. The performance is improved, the cooling performance of the brine in the evaporator 5 is improved, and the absorption of the evaporated refrigerant in the absorber 6 is promoted, so that the coefficient of performance of the absorption refrigerator is improved.

Further, no empty space is generated in the space areas A ₃ and A ₄ above the evaporator 5 and the absorber 6.
The space efficiency is improved, and the structure of the combined heat exchanger 1 including the evaporator 5, the absorber 6, and the subcooler 7 can be further reduced in size, and further the absorption refrigerator can be further reduced in size.

[0057] Also, a transversely disposed transversal opening (openings 3c, 4c) of the two casing parts 3, 4 is provided so as to straddle the upper part of the evaporator 5 and the upper part of the absorber 6. The cooler 7 functions as an eliminator, separates droplets contained in the evaporated refrigerant generated in the evaporator 5, and prevents the evaporated refrigerant from leaving the evaporator 5 with the droplets. In addition, the absorption liquid sprayed in the absorber 6 is prevented from being mixed into the evaporator 5 due to the rebound.

Further, a method of manufacturing the combined heat exchanger 1 including the evaporator 5, the absorber 6, and the supercooler 7 having various effects as described above is constituted by the above-described steps.

As a result, the first to fifth assemblies U _{1 to} U ₅ manufactured by using the brazing means are prepared.
After assembling the first assembly U ₁ and the second assembly U ₂ together by brazing together, the remaining third assembly U _{3 to} fifth assembly U ₅ are added to this integrated assembly. Is assembled, and the combined integrated heat exchanger 1 is temporarily assembled, and the abutting portions (excluding the brazed portions) T _{1 to} T ₁₀ are subjected to TIG welding to thereby form the evaporator 5, the absorber 6 and Subcooler 7
Can be manufactured, so that productivity can be improved and manufacturing cost can be reduced.

Further, the evaporator 5, the absorber 6, and the subcooler
Five main parts that make up the combined heat exchanger 1 of 7
Assembly U₁~ U_FiveAnd these five assemblies U₁
~ U _FiveAfter the manufacture of these five assemblies U₁~ U_FiveTo
Combine and finish into the final product, so defective products
Very low incidence, robust and high quality
Is obtained.

The evaporator 5 and the absorber 6 are constituted by a multi-plate heat exchanger.
Since each of the heat exchangers is constituted by an AND-tube heat exchanger, these individual heat exchangers can be easily manufactured by using brazing means.

Further, the opening 3c in the upper part of the plate 3b
An upright piece 3d is formed on the inner peripheral edge of the plate 4b so as to fit into the inner peripheral edge of the opening 4c in the upper part of the plate 4b.
The positioning of b can be facilitated, and the supercooler 7 can be supported without damage.

[Brief description of the drawings]

FIG. 1 is a cutaway front view of a combined heat exchanger of an evaporator, an absorber and a subcooler according to an embodiment of the present invention described in claims 1 and 2 of the present application. FIG.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV of FIG. 1;

FIG. 5 is a partially enlarged view of FIG. 1;

FIG. 6 is a longitudinal sectional view of a tank which is a component of one casing part constituting a casing of the combined integrated heat exchanger of FIG. 1;

FIG. 7 is a right side view of FIG.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 6;

FIG. 9 is a longitudinal sectional view of a plate as a component of the same casing portion.

FIG. 10 is a right side view of FIG. 9;

11 is a longitudinal sectional view of a tank which is a component of the other casing part constituting the casing of the combined integrated heat exchanger of FIG.

FIG. 12 is a left side view of FIG. 11;

FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 11;

FIG. 14 is a longitudinal sectional view of a plate that is a component of the other casing part.

FIG. 15 is a left side view of FIG.

FIG. 16 is a view showing one manufacturing process of the combined integrated heat exchanger of FIG. 1;

FIG. 17 is a view showing another manufacturing process.

FIG. 18 is a partially enlarged view of FIG. 1, showing a joining state by TIG welding.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Combined heat exchanger, 2 ... Casing, 3 ... Casing part, 3a ... Tank, 3b ... Plate, 3c ... Opening, 3d ... Standing piece, 4 ... Casing part, 4a ... Tank, 4b ... Plate, 4c ... Opening, 5: Evaporator, 6: Absorber, 7: Subcooler, 7a: Condensed refrigerant inlet pipe, 7b: Condensed refrigerant outlet pipe, 8: Expansion valve, 9: Condensed refrigerant spray pipe, 10 ...
Spray pipe for concentrated absorbent, 11 ... Brine inlet pipe, 12 ... Brine outlet pipe, 13 ... Cooling water inlet pipe, 14 ... Cooling water outlet pipe, 15 ... Dilution absorbent outlet pipe, 16 ... Spray pipe for concentrated absorbent liquid, 17 ... drain pipe mounting boss portion, 18 ... stay mounting boss, 19 ... instrument mounting boss portion, 20 ... projection, 21 to 29 ... mounting hole, A _3,
A ₄ ... spatial domain, B ... insulation gap, T ₁ ~T ₁₀ ... contact portion (TIG welds), U ₁ ~U ₅ ... first to fifth assembly.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsutomu Wada 3-25-3 Yoyogi, Shibuya-ku, Tokyo Inside Toyo Radiator Co., Ltd. (72) Inventor Mitsuru Ishikawa 1-4-1 Chuo, Wako-shi, Saitama Pref. Inside the Honda R & D Co., Ltd. (72) Inventor Tohru Fukuda 1-4-1, Chuo, Wako-shi, Saitama Prefecture Stock Company Inside the Honda R & D Co., Ltd. (72) Inventor Kazuma Ichikawa 1-4-1, Chuo, Wako-shi, Saitama Stock Company Honda R & D Center

Claims (2)

[Claims] 1. The casing of a combined integral heat exchanger,
The two casing parts are communicated through an upper communication port, and are separated by an insulating gap below the communication port; one of the two casing parts An evaporator is accommodated in the other casing part of the two casing parts, and an absorber is accommodated.A subcooler crosses the communication port, and the upper part of the evaporator and the upper part of the absorber An evaporator disposed horizontally so as to straddle the upper part, a method for manufacturing an integrated heat exchanger combining an absorber and a supercooler, comprising the following steps: A method of manufacturing an integrated heat exchanger combining an absorber and a subcooler. Two types of tanks, each of which constitutes each of the two casing portions, and a plate that covers the opening of the tank are prepared, and the communication port is formed on one side of each plate. A first assembly in which the plate, which is a component of the one casing portion, and a core portion of the evaporator are integrated by brazing; the plate, which is a component of the other casing portion, and the absorber; A second assembly in which the core portion of the first casing is integrated by brazing, and necessary pipes such as a spray pipe of condensed refrigerant are integrally fixed to the tank, which is a component of the one casing portion, by brazing. A fourth assembly in which required pipes such as a spray pipe for concentrated absorption liquid and an outlet pipe for diluted absorption liquid are integrally fixed to a third assembly and the tank which is a component of the other casing part by brazing. An assembly and a fifth assembly in which the supercooler is constituted by a flat heat exchanger integrally assembled by brazing are prepared. The plates of the first assembly and the second assembly face each other, and the two assemblies are fixed together by brazing and assembled. The fifth assembly is disposed so as to cross the communication opening formed in each plate in the integrated assembly of the process, and the remaining third assembly and the fourth assembly are assembled. And temporarily assemble the combined heat exchanger. The abutting portions between the respective assemblies in the temporary assembly in the process are TIG-welded except for the brazed portions. 2. The heat exchanger according to claim 1, wherein the evaporator and the absorber are constituted by a multi-plate heat exchanger, and the subcooler is constituted by a fin-and-tube heat exchanger. 2. A method for producing a combined heat exchanger comprising a combination of an evaporator, an absorber and a subcooler according to 1.